/* ══════════════════════════════════════════════
   Deb8er Learn — Premium LMS Roadmap
   Brand palette only: #0B0E14 #111827 #1F2937
   #3ABEFF #a68af9 #22d3ee #E5E7EB #9CA3AF
   #6B7280 #4B5563 #34D399 #F87171
   ══════════════════════════════════════════════ */

/* ─── Screen-reader only (SEO headings) ─── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ─── Gem Icon ─── */
.gem-icon {
  display: inline-block;
  width: 30px;
  height: 30px;
  vertical-align: middle;
  background: url(images/gem.webp) no-repeat center/contain;
  margin: 0 4px;
  flex-shrink: 0;
}
.gem-icon--sm { width: 30px; height: 30px; }
.gem-icon--lg { width: 44px; height: 44px; }
.gem-icon--inline { margin: 0 6px -5px 0; }

/* ─── Design Tokens ─── */
:root {
  --pg-bg: #0B0E14;
  --surface: #111827;
  --border: #1F2937;
  --blue: #3ABEFF;
  --purple: #a68af9;
  --teal: #22d3ee;
  --gradient: linear-gradient(90deg, #a68af9, #3ABEFF);
  --text: #E5E7EB;
  --gray: #9CA3AF;
  --dim: #6B7280;
  --muted: #4B5563;
  --success: #34D399;
  --white: #E5E7EB;
}

/* ══════════════════════════════════════════════
   LAYOUT
   ══════════════════════════════════════════════ */

.learn-section {
  max-width: 960px;
  margin: 0 auto;
  padding: 100px 28px 120px;
  overflow-x: hidden;
}

/* ─── Page Header ─── */
.learn-header {
  margin-bottom: 32px;
}

.learn-heading {
  font-family: var(--heading-font);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
  letter-spacing: -0.02em;
}

.learn-subtitle {
  font-size: 0.82rem;
  color: var(--dim);
  font-weight: 400;
}

/* ══════════════════════════════════════════════
   1. STATS BAR — Minimal header
   ══════════════════════════════════════════════ */

/* ─── Top Section (level card + stats + compact quests) ─── */

#topSection {
  margin-bottom: 32px;
}

.level-card {
  background: linear-gradient(135deg, rgba(58,190,255,0.06) 0%, rgba(166,138,249,0.03) 100%);
  border: 1px solid rgba(58,190,255,0.12);
  border-radius: 14px;
  padding: 20px 24px;
  margin-bottom: 12px;
  backdrop-filter: blur(8px);
  box-shadow: 0 0 24px rgba(58,190,255,0.04);
}

.level-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.level-badge {
  display: flex;
  align-items: center;
  gap: 10px;
}

.level-badge-num {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, #3ABEFF, #a68af9);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.level-badge-title {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--gray);
}

.level-xp-block {
  text-align: right;
}

.level-xp-current {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray);
  display: block;
}

.level-xp-next {
  font-size: 0.68rem;
  color: var(--muted);
}

.level-bar-track {
  position: relative;
  height: 8px;
  background: rgba(58,190,255,0.06);
  border-radius: 99px;
  overflow: visible;
  margin-top: 4px;
}

.level-bar-fill {
  height: 100%;
  border-radius: 99px;
  background: linear-gradient(90deg, #3ABEFF, #a68af9);
  transition: width 0.5s ease;
}

.level-bar-pct {
  position: absolute;
  right: 0;
  top: calc(100% + 4px);
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--muted);
  line-height: 1;
}

/* ─── Top Row: Stats + Quests ─── */

.top-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.stat-card {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, rgba(58,190,255,0.05) 0%, rgba(166,138,249,0.02) 100%);
  border: 1px solid rgba(58,190,255,0.08);
  border-radius: 12px;
  padding: 24px 14px;
  min-width: 0;
  text-align: center;
  backdrop-filter: blur(6px);
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}
.stat-card:hover {
  border-color: rgba(58,190,255,0.18);
  box-shadow: 0 4px 20px rgba(58,190,255,0.06);
  transform: translateY(-2px);
}

.stat-card-icon {
  font-size: 2.2rem;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(58,190,255,0.06);
  color: var(--purple);
  flex-shrink: 0;
  transition: background 0.25s;
}
.stat-card:hover .stat-card-icon {
  background: rgba(58,190,255,0.1);
}

.stat-card-value {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--gray);
  line-height: 1.2;
}

.stat-card-label {
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ─── Compact Quests Card ─── */

.quests-card {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: linear-gradient(135deg, rgba(58,190,255,0.05) 0%, rgba(166,138,249,0.02) 100%);
  border: 1px solid rgba(58,190,255,0.08);
  border-radius: 12px;
  padding: 12px 16px;
  gap: 8px;
  min-width: 200px;
  backdrop-filter: blur(6px);
}

.quests-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.quests-card-header span:first-child {
  display: flex;
  align-items: center;
  gap: 5px;
}

.quests-card-reset {
  font-size: 0.58rem;
  font-weight: 400;
  color: var(--muted);
  text-transform: none;
  letter-spacing: 0;
}

.quests-card-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.qc-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 8px;
  background: rgba(58,190,255,0.03);
  transition: background 0.15s;
}
.qc-item:hover {
  background: rgba(58,190,255,0.05);
}

.qc-item.done { background: rgba(16,185,129,0.06); }
.qc-item.claimed { opacity: 0.5; }

.qc-icon {
  font-size: 0.65rem;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: rgba(58,190,255,0.08);
  color: var(--blue);
  flex-shrink: 0;
}

.qc-body {
  flex: 1;
  min-width: 0;
}

.qc-label {
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--gray);
  line-height: 1.3;
  margin-bottom: 3px;
}

/* ─── Quest Tooltip ─── */

.qc-item[data-tip] {
  position: relative;
}

.qc-item[data-tip]::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.85);
  color: #fff;
  font-size: 0.6rem;
  font-weight: 400;
  padding: 4px 8px;
  border-radius: 6px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease;
  z-index: 100;
}

.qc-item[data-tip]:hover::after {
  opacity: 1;
}

.qc-bar {
  height: 3px;
  background: rgba(255,255,255,0.06);
  border-radius: 99px;
  overflow: hidden;
}

.qc-bar-fill {
  height: 100%;
  border-radius: 99px;
  background: linear-gradient(90deg, #3ABEFF, #a68af9);
  transition: width 0.3s ease;
}

.qc-item.done .qc-bar-fill { background: var(--green); }

.qc-right {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.qc-xp {
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--muted);
  white-space: nowrap;
}

.qc-claimed {
  font-size: 0.6rem;
  color: var(--green);
}

.qc-claim-btn {
  border: none;
  background: rgba(16,185,129,0.1);
  color: var(--green);
  width: 22px;
  height: 22px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 0.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
}

.qc-claim-btn:hover {
  background: rgba(16,185,129,0.2);
}

/* ─── Responsive ─── */

@media (max-width: 700px) {
  .top-row {
    flex-direction: column;
  }
  .stat-card {
    flex: 1 1 auto;
    flex-direction: row;
    gap: 12px;
    padding: 14px 18px;
    text-align: left;
    justify-content: flex-start;
  }
  .stat-card-icon {
    font-size: 1.3rem;
    width: 40px;
    height: 40px;
    border-radius: 10px;
  }
  .stat-card-value {
    font-size: 0.85rem;
  }
  .stat-card-label {
    font-size: 0.6rem;
  }
  .quests-card {
    flex: 1 1 auto;
  }
  .level-card {
    padding: 16px;
  }
  .level-badge-num { font-size: 1.25rem; }
}

.stats-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-bottom: 16px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--border);
}

.stats-divider {
  width: 1px;
  height: 24px;
  background: var(--border);
  flex-shrink: 0;
}

/* ─── XP ─── */
.stats-xp {
  flex: 1;
  min-width: 0;
}

.stats-xp-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 5px;
}

.stats-xp-label {
  font-size: 0.62rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}

.stats-xp-value {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--gray);
  font-variant-numeric: tabular-nums;
}

.stats-xp-bar {
  height: 3px;
  background: rgba(255,255,255,0.04);
  border-radius: 4px;
  overflow: hidden;
}

.stats-xp-fill {
  height: 100%;
  border-radius: 4px;
  background: var(--gradient);
  transition: width 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.stats-xp-next {
  font-size: 0.6rem;
  color: var(--muted);
  margin-top: 3px;
}

/* ─── Streak ─── */
.stats-streak {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.stats-streak-icon {
  font-size: 0.8rem;
  color: var(--blue);
  width: 20px;
  text-align: center;
}

.stats-streak-info {
  display: flex;
  flex-direction: column;
}

.stats-streak-count {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}

.stats-streak-label {
  font-size: 0.55rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--dim);
}

/* ─── Checkmark ─── */
.stats-check {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.stats-check-icon {
  font-size: 0.75rem;
  width: 20px;
  text-align: center;
}

.stats-check-icon.done {
  color: var(--success);
}

.stats-check-icon.pending {
  color: var(--muted);
}

.stats-check-info {
  display: flex;
  flex-direction: column;
}

.stats-check-status {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.2;
}

.stats-check-label {
  font-size: 0.55rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--dim);
}

/* ══════════════════════════════════════════════
   2. MODULE HEADERS
   ══════════════════════════════════════════════ */

.unit {
  margin-top: 36px;
}

.unit:first-of-type {
  margin-top: 28px;
}

.unit-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  position: relative;
  transition: border-color 0.2s;
  border-left: 3px solid transparent;
}

.unit-header::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  border-radius: 10px 0 0 10px;
  background: var(--unit-color, var(--blue));
  opacity: 0.3;
}

.unit-header.complete {
  border-color: rgba(52, 211, 153, 0.12);
}

.unit-header.complete::before {
  background: var(--success);
  opacity: 0.5;
}

.unit-icon-box {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  background: var(--unit-color, var(--blue)) !important;
  color: #0B0E14 !important;
}

.unit-body {
  flex: 1;
  min-width: 0;
}

.unit-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}

.unit-subtitle {
  font-size: 0.7rem;
  color: var(--dim);
  margin-top: 1px;
}

.unit-meta {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  margin-left: auto;
}

/* ─── Progress Ring ─── */
.unit-ring-wrap {
  position: relative;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.unit-ring-pct {
  position: absolute;
  font-size: 0.6rem;
  font-weight: 700;
  color: var(--teal);
  font-variant-numeric: tabular-nums;
}

.unit-ring-pct.dim {
  color: var(--muted);
}

.unit-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.68rem;
  color: var(--success);
  font-weight: 600;
  background: rgba(52, 211, 153, 0.06);
  border: 1px solid rgba(52, 211, 153, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
}

/* ══════════════════════════════════════════════
   3. TIMELINE & LESSON NODES
   ══════════════════════════════════════════════ */

.lesson-chain {
  position: relative;
  margin: 0 0 0 24px;
  padding: 8px 0 4px 32px;
}

.lesson-chain::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 1.5px;
  background: rgba(255,255,255,0.04);
  border-radius: 2px;
}

.lesson-chain.has-progress::before {
  background: linear-gradient(to bottom, var(--blue), rgba(255,255,255,0.03));
}

/* ─── Lesson Node ─── */
.lesson-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  margin-bottom: 6px;
  background: linear-gradient(135deg, rgba(58,190,255,0.03) 0%, rgba(166,138,249,0.015) 100%);
  border: 1px solid rgba(58,190,255,0.06);
  border-radius: 10px;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
}

.lesson-row:last-child {
  margin-bottom: 0;
}

.lesson-row:hover:not(.locked) {
  border-color: rgba(58,190,255,0.2);
  background: linear-gradient(135deg, rgba(58,190,255,0.06) 0%, rgba(166,138,249,0.03) 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(58,190,255,0.06);
}

.lesson-row.active {
  border-color: rgba(58,190,255,0.35);
  background: linear-gradient(135deg, rgba(58,190,255,0.08) 0%, rgba(166,138,249,0.04) 100%);
  box-shadow: 0 0 20px rgba(58,190,255,0.06);
}

.lesson-row.completed {
  border-color: rgba(52, 211, 153, 0.12);
}

.lesson-row.locked {
  opacity: 0.4;
  cursor: default;
}

.lesson-row.daily-limited {
  opacity: 0.65;
  cursor: default;
}

.lesson-row.locked .lesson-name {
  color: var(--muted);
}

.lesson-row.daily-limited .lesson-name {
  color: var(--muted);
}

.lesson-daily-limit {
  color: #FBBF24 !important;
  font-size: 0.62rem;
  font-weight: 600;
}

.lesson-row.locked .lesson-meta span:first-child {
  color: var(--dim);
  font-size: 0.62rem;
}

/* ─── Timeline Dot ─── */
.lesson-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.5rem;
  border: 1.5px solid rgba(58,190,255,0.1);
  background: transparent;
  transition: all 0.2s ease;
  color: var(--muted);
}

.lesson-row.active .lesson-dot {
  border-color: var(--blue);
  background: linear-gradient(135deg, #3ABEFF, #a68af9);
  color: var(--pg-bg);
}

.lesson-row.completed .lesson-dot {
  border-color: var(--success);
  background: linear-gradient(135deg, #34D399, #10B981);
  color: var(--pg-bg);
}

.lesson-row.locked .lesson-dot {
  border-color: rgba(255,255,255,0.03);
}

.lesson-row.daily-limited .lesson-dot {
  border-color: #FBBF24;
  background: linear-gradient(135deg, #FBBF24, #F59E0B);
  color: var(--pg-bg);
}

/* ─── Lesson Content ─── */
.lesson-body {
  flex: 1;
  min-width: 0;
}

.lesson-name {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.3;
}

.lesson-row.locked .lesson-name {
  color: var(--muted);
}

.lesson-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.7rem;
  color: var(--dim);
  margin-top: 2px;
}

.lesson-xp {
  background: linear-gradient(135deg, #3ABEFF, #a68af9);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 600;
}

.lesson-row.completed .lesson-xp {
  color: var(--muted);
}

.lesson-row.locked .lesson-xp {
  color: var(--dim);
}

.lesson-score {
  color: var(--success);
  font-weight: 500;
}

.lesson-resume-tag {
  display: inline-block;
  font-size: 0.6rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--cyan);
  background: rgba(58, 190, 255, 0.1);
  border: 1px solid rgba(58, 190, 255, 0.2);
  border-radius: 4px;
  padding: 2px 6px;
  margin-left: 6px;
  vertical-align: middle;
}

.lesson-review-tag {
  display: inline-block;
  font-size: 0.6rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  padding: 2px 6px;
  margin-left: 6px;
  vertical-align: middle;
}

/* ══════════════════════════════════════════════
   4. LESSON MODAL
   ══════════════════════════════════════════════ */

.lesson-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1001;
  align-items: center;
  justify-content: center;
}

.lesson-modal.open { display: flex; }

/* Debix visibility now controlled by JS via .debix-hidden class */

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.65);
}

.modal-card {
  position: relative;
  width: 100%;
  max-width: 660px;
  max-height: 90vh;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow-y: auto;
  animation: modal-in 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modal-in {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}

.modal-head-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.modal-head-dot {
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--blue);
}

.modal-head-title {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text);
}

.modal-head-unit {
  font-size: 0.6rem;
  color: var(--dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--muted);
  width: 32px;
  height: 32px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease, color 0.15s ease;
}

.modal-close:hover {
  background: rgba(255,255,255,0.04);
  color: var(--text);
}

.modal-body {
  padding: 48px 18px 22px;
}

.q-counter {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-weight: 600;
  margin-bottom: 12px;
}

.q-text {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.6;
  margin-bottom: 22px;
}

.q-opts {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.q-opt {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px 18px;
  color: var(--text);
  font-size: 0.9rem;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
  font-family: inherit;
  line-height: 1.45;
}

.q-opt:hover:not(:disabled) {
  border-color: rgba(58, 190, 255, 0.15);
  background: rgba(58, 190, 255, 0.03);
}

.q-opt:disabled { cursor: default; }

.q-opt.correct {
  border-color: var(--success);
  background: rgba(52, 211, 153, 0.04);
  color: var(--success);
}

.q-opt.wrong {
  border-color: #F87171;
  background: rgba(248, 113, 113, 0.04);
  color: #FCA5A5;
}

.q-explain {
  margin-top: 12px;
  padding: 12px 14px;
  background: rgba(255,255,255,0.01);
  border: 1px solid rgba(255,255,255,0.03);
  border-radius: 6px;
  font-size: 0.78rem;
  color: var(--dim);
  line-height: 1.5;
  animation: fade-up 0.25s ease;
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Phase Indicator ─── */
.modal-section-indicator {
  padding: 8px 18px 0;
  display: flex;
  align-items: center;
}

.phase-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.6rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 10px;
  border-radius: 4px;
}

/* ─── Section: Learn ─── */
.sec-learn { animation: fade-up 0.3s ease; }
.sec-icon {
  font-size: 1.3rem;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}
.sec-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
  line-height: 1.3;
}
.sec-content {
  font-size: 0.85rem;
  color: var(--gray);
  line-height: 1.65;
  margin-bottom: 12px;
}
.sec-bullets {
  list-style: none;
  padding: 0;
  margin: 0;
}
.sec-bullets li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 6px;
  font-size: 0.82rem;
  color: var(--gray);
  line-height: 1.5;
}
.sec-bullets li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--blue);
  opacity: 0.5;
}

/* ─── Section: Example ─── */
.sec-example { animation: fade-up 0.3s ease; }
.ex-good {
  background: rgba(52, 211, 153, 0.03);
  border: 1px solid rgba(52, 211, 153, 0.08);
  border-radius: 6px;
  padding: 12px 14px;
  margin-bottom: 10px;
  font-size: 0.82rem;
  color: var(--gray);
  line-height: 1.55;
}
.ex-bad {
  background: rgba(248, 113, 113, 0.03);
  border: 1px solid rgba(248, 113, 113, 0.08);
  border-radius: 6px;
  padding: 12px 14px;
  margin-bottom: 12px;
  font-size: 0.82rem;
  color: var(--gray);
  line-height: 1.55;
}
.ex-label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 5px;
  display: flex;
  align-items: center;
  gap: 4px;
}
.ex-good .ex-label { color: var(--success); }
.ex-bad .ex-label { color: #F87171; }
.ex-breakdown {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}
.ex-part {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--gray);
}
.ex-part-label {
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  flex-shrink: 0;
  min-width: 70px;
}
.ex-part-text {
  color: var(--dim);
}
.ex-explain {
  background: rgba(162, 138, 249, 0.03);
  border: 1px solid rgba(162, 138, 249, 0.08);
  border-radius: 6px;
  padding: 12px 14px;
  font-size: 0.8rem;
  color: var(--gray);
  line-height: 1.55;
  display: flex;
  gap: 6px;
  align-items: flex-start;
}
.ex-explain i {
  color: var(--purple);
  margin-top: 2px;
  flex-shrink: 0;
}

/* ─── Section: Practice ─── */
.sec-practice { animation: fade-up 0.3s ease; }
.sec-instruction {
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.55;
  margin-bottom: 16px;
  font-weight: 500;
}
.p-opts {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.p-opt {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 16px;
  color: var(--text);
  font-size: 0.82rem;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
  font-family: inherit;
  line-height: 1.4;
}
.p-opt:hover:not(:disabled) {
  border-color: rgba(34, 211, 238, 0.15);
  background: rgba(34, 211, 238, 0.03);
}
.p-opt:disabled { cursor: default; }
.p-opt.correct {
  border-color: var(--success);
  background: rgba(52, 211, 153, 0.04);
  color: var(--success);
}
.p-opt.wrong {
  border-color: #F87171;
  background: rgba(248, 113, 113, 0.04);
  color: #FCA5A5;
}
.p-feedback {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 6px;
  font-size: 0.8rem;
  line-height: 1.5;
  display: flex;
  gap: 6px;
  align-items: flex-start;
  animation: fade-up 0.25s ease;
}
.p-feedback.correct {
  background: rgba(52, 211, 153, 0.04);
  border: 1px solid rgba(52, 211, 153, 0.08);
  color: var(--success);
}
.p-feedback.wrong {
  background: rgba(248, 113, 113, 0.04);
  border: 1px solid rgba(248, 113, 113, 0.08);
  color: #FCA5A5;
}
.p-feedback i { margin-top: 2px; }

/* ─── Section: Quiz ─── */
.sec-quiz { animation: fade-up 0.3s ease; }

/* ─── Lesson Steps (card) ─── */
.lesson-steps {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.6rem;
  color: var(--dim);
  font-weight: 500;
}
.step-type {
  display: inline-flex;
  align-items: center;
  gap: 3px;
}
.step-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  display: inline-block;
}

/* ─── Dots answered state ─── */
.modal-dot.answered {
  background: var(--success);
}

.modal-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 18px 16px;
  border-top: 1px solid var(--border);
}

.modal-dots {
  display: flex;
  gap: 5px;
}

.modal-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  transition: all 0.2s ease;
}

.modal-dot.active { background: var(--blue); }
.modal-dot.correct { background: var(--success); }
.modal-dot.wrong { background: #F87171; }

.btn-next {
  background: var(--gradient);
  border: none;
  color: var(--pg-bg);
  padding: 8px 20px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.78rem;
  cursor: pointer;
  display: none;
  align-items: center;
  gap: 6px;
  transition: opacity 0.15s ease;
}

.btn-next:hover { opacity: 0.85; }

/* ══════════════════════════════════════════════
   5. COMPLETION
   ══════════════════════════════════════════════ */

.completion {
  text-align: center;
  padding: 20px 20px 24px;
  animation: fade-up 0.4s ease;
}

.comp-header {
  margin-bottom: 20px;
}

.comp-ring-wrap {
  position: relative;
  width: 100px;
  height: 100px;
  margin: 0 auto 12px;
}

.comp-ring {
  width: 100%;
  height: 100%;
}

.comp-ring-bg {
  stroke: rgba(255,255,255,0.04);
}

.comp-ring-fill {
  transition: stroke-dashoffset 0.8s cubic-bezier(0.22,1,0.36,1);
}

.comp-ring-icon {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  animation: comp-icon-bounce 0.5s cubic-bezier(0.34,1.56,0.64,1) 0.2s both;
}

@keyframes comp-icon-bounce {
  0% { transform: scale(0); opacity: 0; }
  60% { transform: scale(1.2); }
  100% { transform: scale(1); opacity: 1; }
}

.comp-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 2px;
  animation: fade-up 0.35s ease 0.15s both;
}

.comp-sub {
  font-size: 0.78rem;
  color: var(--dim);
  animation: fade-up 0.35s ease 0.2s both;
}

.comp-review {
  color: var(--muted);
  font-style: italic;
}

.comp-score-area {
  margin-bottom: 16px;
  animation: fade-up 0.35s ease 0.25s both;
}

.comp-score-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
}

.comp-score-total {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--dim);
}

.comp-score-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-top: 2px;
}

.comp-xp-display {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, rgba(58,190,255,0.08), rgba(166,138,249,0.04));
  border: 1px solid rgba(58,190,255,0.15);
  border-radius: 10px;
  padding: 10px 22px;
  margin-bottom: 16px;
  backdrop-filter: blur(4px);
  animation: fade-up 0.35s ease 0.3s both;
}

.comp-xp-num {
  font-size: 1.4rem;
  font-weight: 800;
  background: linear-gradient(135deg, #3ABEFF, #a68af9);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-variant-numeric: tabular-nums;
}

.comp-xp-label {
  font-size: 0.68rem;
  color: var(--gray);
  font-weight: 500;
}

.comp-chips {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0 auto 20px;
  max-width: 280px;
  animation: fade-up 0.35s ease 0.35s both;
}

.comp-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 500;
  backdrop-filter: blur(4px);
  animation: chip-in 0.35s cubic-bezier(0.22,1,0.36,1) backwards;
}

.comp-chip:nth-child(1) { animation-delay: 0.35s; }
.comp-chip:nth-child(2) { animation-delay: 0.42s; }
.comp-chip:nth-child(3) { animation-delay: 0.49s; }
.comp-chip:nth-child(4) { animation-delay: 0.56s; }
.comp-chip:nth-child(5) { animation-delay: 0.63s; }

@keyframes chip-in {
  from { opacity: 0; transform: translateX(-10px); }
  to { opacity: 1; transform: translateX(0); }
}

.comp-chip--streak {
  background: linear-gradient(135deg, rgba(58,190,255,0.06), rgba(58,190,255,0.02));
  border: 1px solid rgba(58,190,255,0.1);
  color: var(--blue);
}

.comp-chip--levelup {
  background: linear-gradient(135deg, rgba(251,191,36,0.06), rgba(245,158,11,0.02));
  border: 1px solid rgba(251,191,36,0.12);
  color: #FBBF24;
}

.comp-chip--achievement {
  background: linear-gradient(135deg, rgba(166,138,249,0.06), rgba(58,190,255,0.02));
  border: 1px solid rgba(166,138,249,0.12);
  color: var(--purple);
}

.comp-chip i {
  font-size: 0.75rem;
  width: 18px;
  text-align: center;
  flex-shrink: 0;
}

.comp-chip-share {
  background: none;
  border: none;
  color: rgba(166,138,249,0.3);
  cursor: pointer;
  font-size: 0.65rem;
  padding: 2px 4px;
  margin-left: auto;
  transition: color .2s, transform .2s;
  line-height: 1;
}

.comp-chip-share:hover {
  color: var(--blue);
  transform: scale(1.15);
}

.review-section {
  margin-top: 16px;
  animation: fade-up 0.35s ease 0.35s both;
}

.review-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  color: var(--dim);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.review-toggle:hover {
  background: rgba(255,255,255,0.07);
  color: var(--white);
  border-color: rgba(255,255,255,0.14);
}

.review-chevron {
  margin-left: auto;
  font-size: 0.65rem;
  transition: transform 0.25s ease;
}

.review-list {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 400px;
  overflow-y: auto;
  padding-right: 4px;
}

.review-list::-webkit-scrollbar {
  width: 4px;
}

.review-list::-webkit-scrollbar-track {
  background: transparent;
}

.review-list::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.12);
  border-radius: 4px;
}

.review-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 10px;
  padding: 12px 14px;
}

.review-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.review-type-badge {
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--cyan);
  background: rgba(58,190,255,0.1);
  border: 1px solid rgba(58,190,255,0.15);
  border-radius: 4px;
  padding: 2px 7px;
}

.review-q-num {
  font-size: 0.65rem;
  color: var(--muted);
  font-weight: 600;
}

.review-question {
  font-size: 0.8rem;
  color: var(--white);
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 10px;
}

.review-answers {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 8px;
}

.review-answer-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.75rem;
  line-height: 1.4;
}

.review-user-wrong {
  color: #F87171;
}

.review-user-wrong i {
  margin-top: 2px;
  flex-shrink: 0;
}

.review-correct {
  color: #34D399;
}

.review-correct i {
  margin-top: 2px;
  flex-shrink: 0;
}

.review-explanation {
  font-size: 0.72rem;
  color: var(--dim);
  line-height: 1.5;
  padding: 8px 10px;
  background: rgba(58,190,255,0.05);
  border-left: 3px solid rgba(58,190,255,0.3);
  border-radius: 0 6px 6px 0;
  margin-top: 4px;
}

.review-explanation i {
  color: #FBBF24;
  margin-right: 4px;
}

.comp-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  animation: fade-up 0.35s ease 0.4s both;
}

.btn-review-page {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  background: rgba(58,190,255,0.08);
  border: 1px solid rgba(58,190,255,0.2);
  border-radius: 10px;
  color: var(--blue);
  font-weight: 600;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--text-font);
}

.btn-review-page:hover {
  background: rgba(58,190,255,0.14);
  border-color: rgba(58,190,255,0.3);
  transform: translateY(-1px);
}

.btn-next-lesson {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 28px;
  background: linear-gradient(135deg, #3ABEFF, #a68af9);
  border: none;
  border-radius: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.2s, box-shadow 0.2s;
  font-family: var(--text-font);
}

.btn-next-lesson:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(58,190,255,0.2);
}

.btn-continue {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  color: var(--gray);
  font-weight: 500;
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--text-font);
}

.btn-continue:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.12);
  color: var(--text);
}
  cursor: pointer;
  transition: opacity 0.15s ease;
  font-family: inherit;
}

.btn-continue:hover { opacity: 0.85; }

/* ══════════════════════════════════════════════
   6. TOASTS
   ══════════════════════════════════════════════ */

.toast-container {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 6px;
  pointer-events: none;
}

.toast {
  padding: 9px 16px;
  border-radius: 6px;
  font-weight: 500;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0;
  transform: translateY(14px);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: auto;
}

.toast.show { opacity: 1; transform: translateY(0); }

.toast.xp {
  background: rgba(58, 190, 255, 0.06);
  border: 1px solid rgba(58, 190, 255, 0.08);
  color: var(--blue);
}

.toast.achievement {
  background: rgba(162, 138, 249, 0.06);
  border: 1px solid rgba(162, 138, 249, 0.08);
  color: var(--purple);
}

.toast.streak {
  background: rgba(58, 190, 255, 0.04);
  border: 1px solid rgba(58, 190, 255, 0.06);
  color: var(--blue);
}

/* ══════════════════════════════════════════════
   7. LOADING / AUTH
   ══════════════════════════════════════════════ */

.learn-loading {
  text-align: center;
  padding: 80px 0;
  color: var(--dim);
  font-size: 0.85rem;
}

.learn-loading i { margin-right: 6px; }

.auth-message {
  padding: 80px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.auth-card {
  max-width: 380px;
  width: 100%;
  margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px 32px 36px;
  text-align: center;
}

.auth-card-icon {
  font-size: 2rem;
  color: var(--blue);
  margin-bottom: 16px;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(58, 190, 255, 0.06);
  border-radius: 14px;
  margin-left: auto;
  margin-right: auto;
}

.auth-card-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.3;
}

.auth-card-desc {
  font-size: 0.82rem;
  color: var(--dim);
  line-height: 1.5;
  margin-bottom: 24px;
}

.auth-card-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.auth-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: opacity 0.15s ease, transform 0.15s ease;
  font-family: inherit;
  cursor: pointer;
}

.auth-btn:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.auth-btn.primary {
  background: var(--gradient);
  color: #0B0E14;
}

.auth-btn.secondary {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  color: var(--gray);
}

.auth-btn.secondary:hover {
  background: rgba(255,255,255,0.05);
  color: var(--text);
}

/* ══════════════════════════════════════════════
   8. DAILY QUESTS
   ══════════════════════════════════════════════ */

.quests-section {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

.quests-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.quests-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.quests-header-left i {
  font-size: 0.9rem;
  color: var(--blue);
}

.quests-header-left h3 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin: 0;
}

.quests-reset {
  font-size: 0.65rem;
  color: var(--dim);
  font-weight: 500;
}

.quests-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.quest-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: border-color 0.2s, background 0.2s;
}

.quest-item.done {
  border-color: rgba(52,211,153,0.08);
}

.quest-item.claimed {
  opacity: 0.55;
}

.quest-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(58,190,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--blue);
  flex-shrink: 0;
}

.quest-item.done .quest-icon {
  background: rgba(52,211,153,0.08);
  color: var(--success);
}

.quest-body {
  flex: 1;
  min-width: 0;
}

.quest-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1px;
}

.quest-item.claimed .quest-label {
  color: var(--muted);
}

.quest-desc {
  font-size: 0.68rem;
  color: var(--dim);
  margin-bottom: 8px;
}

.quest-bar-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.quest-bar {
  flex: 1;
  height: 4px;
  background: rgba(255,255,255,0.04);
  border-radius: 4px;
  overflow: hidden;
}

.quest-bar-fill {
  height: 100%;
  border-radius: 4px;
  background: var(--gradient);
  transition: width 0.4s cubic-bezier(0.16,1,0.3,1);
}

.quest-item.done .quest-bar-fill {
  background: var(--success);
}

.quest-count {
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
  min-width: 26px;
  text-align: right;
}

.quest-right {
  flex-shrink: 0;
  min-width: 80px;
  text-align: right;
}

.quest-xp-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--blue);
}

.quest-claim-btn {
  padding: 6px 14px;
  border: none;
  border-radius: 6px;
  background: var(--gradient);
  color: var(--pg-bg);
  font-family: inherit;
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s ease, transform 0.15s ease;
  white-space: nowrap;
}

.quest-claim-btn:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.quest-claimed-badge {
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--success);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ══════════════════════════════════════════════
   9. INTERACTIVE EXERCISE TYPES
   ══════════════════════════════════════════════ */

/* ─── Fill in the Blank ─── */
.sec-fill-blank { animation: fade-up 0.3s ease; }

.fb-sentence {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.7;
  margin-bottom: 20px;
  padding: 16px 18px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.fb-slot {
  display: inline-block;
  min-width: 70px;
  border-bottom: 2px dashed var(--blue);
  margin: 0 2px;
  padding: 0 4px;
  text-align: center;
  font-weight: 600;
  color: var(--blue);
  transition: all 0.2s ease;
}
.fb-slot[data-filled] {
  cursor: pointer;
}
.fb-slot[data-filled]:hover {
  opacity: 0.6;
  border-bottom-style: solid;
}

.fb-slot.correct {
  border-color: var(--success);
  color: var(--success);
}

.fb-slot.wrong {
  border-color: #F87171;
  color: #F87171;
}

.fb-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.fb-word {
  padding: 8px 16px;
  border-radius: 6px;
  background: rgba(58,190,255,0.06);
  border: 1px solid rgba(58,190,255,0.15);
  color: var(--blue);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.fb-word:hover {
  background: rgba(58,190,255,0.1);
  transform: translateY(-1px);
}

/* ─── Match the Pairs ─── */
.sec-match { animation: fade-up 0.3s ease; }

.match-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.match-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.match-item {
  padding: 11px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.8rem;
  color: var(--gray);
  cursor: pointer;
  transition: all 0.15s ease;
  line-height: 1.4;
}

.match-item-left {
  font-weight: 500;
  color: var(--text);
  border-left: 3px solid var(--purple);
}

.match-item-left:hover,
.match-item-right:hover {
  border-color: rgba(192,132,252,0.2);
  background: rgba(192,132,252,0.02);
}

.match-item.selected {
  border-color: var(--purple);
  background: rgba(192,132,252,0.04);
}

.match-item.matched {
  border-color: var(--success);
  background: rgba(52,211,153,0.04);
  color: var(--success);
  cursor: default;
  opacity: 0.6;
}

.match-item.wrong {
  border-color: var(--error);
  background: rgba(239,68,68,0.06);
  animation: shake 0.3s ease;
}

/* ─── Mobile: pair items vertically ─── */
@media (max-width: 600px) {
  .match-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .match-item {
    font-size: 0.72rem;
    padding: 10px 12px;
  }
}

/* ─── Quiz Timer ─── */
.q-timer-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.q-timer-track {
  flex: 1;
  height: 4px;
  background: #1F2937;
  border-radius: 2px;
  overflow: hidden;
}

.q-timer-bar {
  height: 100%;
  background: #60A5FA;
  border-radius: 2px;
  width: 100%;
}

.q-timer-text {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  min-width: 32px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.match-item.wrong {
  border-color: #F87171;
  background: rgba(248,113,113,0.04);
  animation: shake 0.3s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

/* ─── Put Steps in Order ─── */
.sec-order { animation: fade-up 0.3s ease; }

.order-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.order-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: grab;
  transition: all 0.15s ease;
  font-size: 0.82rem;
  color: var(--gray);
  line-height: 1.4;
  user-select: none;
}

.order-item:hover {
  border-color: rgba(96,165,250,0.15);
  background: rgba(96,165,250,0.02);
}

.order-item.dragging {
  opacity: 0.5;
  border-style: dashed;
}

.order-item.drag-over {
  border-color: #60A5FA;
  background: rgba(96,165,250,0.08);
}

.order-item.correct {
  border-color: var(--success);
  background: rgba(52,211,153,0.04);
  color: var(--success);
  cursor: default;
}

.order-handle {
  color: var(--muted);
  font-size: 0.7rem;
  flex-shrink: 0;
}

.order-text {
  flex: 1;
}

/* ─── Spot the Mistake ─── */
.sec-spot { animation: fade-up 0.3s ease; }

.spot-argument {
  padding: 14px 18px;
  background: rgba(248,113,113,0.03);
  border: 1px solid rgba(248,113,113,0.08);
  border-radius: 8px;
  font-size: 0.88rem;
  color: var(--gray);
  line-height: 1.55;
  margin-bottom: 16px;
  font-style: italic;
  position: relative;
}

.spot-argument::before {
  content: '\f10d';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 0.65rem;
  color: rgba(248,113,113,0.2);
  position: absolute;
  top: 8px;
  left: 8px;
}

.spot-opts {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.spot-opt {
  padding: 11px 16px;
  border-radius: 8px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.82rem;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: all 0.15s ease;
}

.spot-opt:hover:not(:disabled) {
  border-color: rgba(248,113,113,0.15);
  background: rgba(248,113,113,0.02);
}

.spot-opt:disabled { cursor: default; }
.spot-opt.correct {
  border-color: var(--success);
  background: rgba(52,211,153,0.04);
  color: var(--success);
}
.spot-opt.wrong {
  border-color: #F87171;
  background: rgba(248,113,113,0.04);
  color: #FCA5A5;
}

/* ─── Highlight Correct Part ─── */
.sec-highlight { animation: fade-up 0.3s ease; }

.highlight-text {
  padding: 16px 18px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.88rem;
  color: var(--gray);
  line-height: 1.7;
  margin-bottom: 16px;
  cursor: default;
}

.hl-segment {
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 3px;
  transition: all 0.15s ease;
  border: 1px solid transparent;
}

.hl-segment:hover {
  background: rgba(251,191,36,0.04);
  border-color: rgba(251,191,36,0.1);
}

.hl-correct {
  background: rgba(52,211,153,0.06);
  border-color: rgba(52,211,153,0.15);
  color: var(--success);
  font-weight: 500;
}

.hl-wrong {
  background: rgba(248,113,113,0.06);
  border-color: rgba(248,113,113,0.15);
  color: #FCA5A5;
}

/* ─── Build the Argument ─── */
.sec-build { animation: fade-up 0.3s ease; }

.build-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.build-card {
  padding: 10px 14px;
  background: rgba(52,211,153,0.04);
  border: 1px solid rgba(52,211,153,0.1);
  border-radius: 8px;
  font-size: 0.78rem;
  color: var(--success);
  line-height: 1.35;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.build-card:hover {
  background: rgba(52,211,153,0.06);
  border-color: rgba(52,211,153,0.15);
}

.build-card.placed {
  cursor: default;
  padding: 8px 12px;
  font-size: 0.74rem;
}

.build-card.correct {
  border-color: var(--success);
  background: rgba(52,211,153,0.06);
}

.build-card.wrong {
  border-color: #F87171;
  background: rgba(248,113,113,0.04);
  color: #FCA5A5;
}

.build-zones {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.build-zone {
  background: rgba(255,255,255,0.01);
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  min-height: 52px;
  transition: border-color 0.15s ease;
}

.build-zone.active {
  border-color: rgba(52,211,153,0.2);
  background: rgba(52,211,153,0.01);
}

.build-zone-label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 6px;
}

.build-zone-drop {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 24px;
}

/* ─── True or False ─── */
.sec-tf { animation: fade-up 0.3s ease; }

.tf-statement {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.55;
  margin-bottom: 20px;
  padding: 14px 18px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.tf-btns {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.tf-btn {
  flex: 1;
  padding: 14px;
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.tf-btn.true {
  background: rgba(52,211,153,0.04);
  border: 1px solid rgba(52,211,153,0.1);
  color: var(--success);
}

.tf-btn.true:hover:not(:disabled) {
  background: rgba(52,211,153,0.06);
  border-color: rgba(52,211,153,0.15);
}

.tf-btn.false {
  background: rgba(248,113,113,0.04);
  border: 1px solid rgba(248,113,113,0.1);
  color: #FCA5A5;
}

.tf-btn.false:hover:not(:disabled) {
  background: rgba(248,113,113,0.06);
  border-color: rgba(248,113,113,0.15);
}

.tf-btn:disabled { cursor: default; }
.tf-btn.correct {
  box-shadow: 0 0 0 2px var(--success);
  border-color: var(--success);
}
.tf-btn.wrong {
  box-shadow: 0 0 0 2px #F87171;
  border-color: #F87171;
}

/* ─── Mini Scenario ─── */
.sec-scenario { animation: fade-up 0.3s ease; }

.scenario-bubble {
  padding: 14px 18px;
  background: rgba(162,138,249,0.03);
  border: 1px solid rgba(162,138,249,0.08);
  border-radius: 8px;
  font-size: 0.85rem;
  color: var(--gray);
  line-height: 1.55;
  font-style: italic;
  position: relative;
}

.scenario-bubble::before {
  content: '\f10d';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 0.65rem;
  color: rgba(162,138,249,0.15);
  position: absolute;
  top: 8px;
  left: 8px;
}

.scenario-opts {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.scenario-opt {
  padding: 12px 16px;
  border-radius: 8px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.82rem;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: all 0.15s ease;
  line-height: 1.4;
}

.scenario-opt:hover:not(:disabled) {
  border-color: rgba(244,114,182,0.15);
  background: rgba(244,114,182,0.02);
}

.scenario-opt:disabled { cursor: default; }
.scenario-opt.correct {
  border-color: var(--success);
  background: rgba(52,211,153,0.04);
  color: var(--success);
}
.scenario-opt.wrong {
  border-color: #F87171;
  background: rgba(248,113,113,0.04);
  color: #FCA5A5;
}

/* ─── Recap Challenge ─── */
.sec-recap { animation: fade-up 0.3s ease; }

.recap-counter {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 12px;
  text-align: center;
}

.recap-opts {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.recap-opt {
  padding: 12px 16px;
  border-radius: 8px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.82rem;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: all 0.15s ease;
  line-height: 1.4;
}

.recap-opt:hover:not(:disabled) {
  border-color: rgba(52,211,153,0.15);
  background: rgba(52,211,153,0.02);
}

.recap-opt:disabled { cursor: default; }
.recap-opt.correct {
  border-color: var(--success);
  background: rgba(52,211,153,0.04);
  color: var(--success);
}

.recap-opt.wrong {
  border-color: #F87171;
  background: rgba(248,113,113,0.04);
  color: #FCA5A5;
}

/* ══════════════════════════════════════════════
   10. BADGE DISPLAY
   ══════════════════════════════════════════════ */

.badges-section {
  margin-top: 28px;
  padding-top: 28px;
  border-top: 1px solid rgba(58,190,255,0.08);
}

.badges-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.badges-header i {
  font-size: 0.9rem;
  color: var(--blue);
}

.badges-header h3 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin: 0;
}

.badges-header span {
  font-size: 0.65rem;
  color: var(--dim);
  margin-left: auto;
}

.badges-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  width: 72px;
  padding: 10px 6px;
  border-radius: 10px;
  background: rgba(58,190,255,0.02);
  border: 1px solid rgba(58,190,255,0.05);
  transition: border-color 0.2s, background 0.2s;
  cursor: default;
}

.badge-item.earned {
  background: linear-gradient(135deg, rgba(58,190,255,0.06) 0%, rgba(166,138,249,0.03) 100%);
  border-color: rgba(58,190,255,0.12);
}

.badge-item.hidden {
  opacity: 0.3;
}

.badge-item-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  background: rgba(58,190,255,0.04);
  color: var(--muted);
}

.badge-item.earned .badge-item-icon {
  background: rgba(58,190,255,0.12);
  color: var(--blue);
}

.badge-item-label {
  font-size: 0.58rem;
  font-weight: 500;
  color: var(--muted);
  text-align: center;
  line-height: 1.2;
  max-width: 60px;
}

.badge-item.earned .badge-item-label {
  color: var(--gray);
}

.badge-item.hidden .badge-item-label {
  color: var(--muted);
}

.badge-item {
  position: relative;
}

.badge-item[data-tip]::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.85);
  color: #fff;
  font-size: 0.6rem;
  font-weight: 400;
  padding: 4px 8px;
  border-radius: 6px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease;
  z-index: 100;
}

.badge-item[data-tip]:hover::after {
  opacity: 1;
}

/* ══════════════════════════════════════════════
   10. RESPONSIVE
   ══════════════════════════════════════════════ */

@media (max-width: 768px) {
  .learn-section {
    padding: 80px 16px 100px;
  }

  .learn-header {
    margin-top: 0;
    margin-bottom: 24px;
  }

  .learn-heading {
    font-size: 1.2rem;
  }

  .learn-subtitle {
    font-size: 0.75rem;
  }

  .stats-bar {
    padding: 12px 14px;
    gap: 12px;
    flex-wrap: wrap;
  }

  .stats-divider { height: 24px; }

  .stats-streak { gap: 6px; }
  .stats-streak-icon { font-size: 0.72rem; }
  .stats-bar { padding-bottom: 12px; margin-bottom: 20px; gap: 12px; }
  .stats-xp-label { font-size: 0.58rem; }
  .stats-xp-value { font-size: 0.64rem; }
  .stats-xp-next { font-size: 0.55rem; }
  .stats-streak-count { font-size: 0.78rem; }
  .stats-streak-label { display: none; }
  .stats-check-status { font-size: 0.78rem; }
  .stats-check-label { display: none; }

  .unit-header { padding: 12px 14px; }
  .unit-icon-box { width: 30px; height: 30px; font-size: 0.85rem; }
  .unit-title { font-size: 0.82rem; }
  .unit-subtitle { font-size: 0.65rem; }

  .lesson-chain { padding: 6px 0 2px 22px; margin-left: 13px; }
  .lesson-chain::before { left: 6px; }

  .lesson-row { padding: 10px 12px; }
  .lesson-dot { width: 16px; height: 16px; font-size: 0.4rem; }
  .lesson-name { font-size: 0.75rem; }

  .modal-card {
    max-width: 100%;
    max-height: 100vh;
    border-radius: 0;
    border: none;
  }

  .q-text { font-size: 0.88rem; }
  .comp-title { font-size: 1.05rem; }
  .comp-xp-num { font-size: 1.15rem; }

  .lesson-steps { display: none; }

  .sec-learn { padding: 4px 0; }
  .sec-example { padding: 4px 0; }
  .sec-practice { padding: 4px 0; }
  .sec-quiz { padding: 4px 0; }
  .sec-title { font-size: 0.9rem; }
  .sec-content { font-size: 0.8rem; }
  .sec-bullets li { font-size: 0.78rem; }
  .p-opt { font-size: 0.78rem; padding: 8px 12px; }
  .q-text { font-size: 0.88rem; }
  .ex-good, .ex-bad { padding: 10px 12px; font-size: 0.78rem; }
  .ex-part { font-size: 0.75rem; }
  .ex-explain { font-size: 0.75rem; }
  .p-feedback { font-size: 0.75rem; padding: 10px 12px; }
  .q-explain { font-size: 0.75rem; padding: 10px 12px; }
}

@media (max-width: 480px) {
  .stats-bar { gap: 8px; }
  .stats-divider { display: none; }
  .stats-xp-next { display: none; }

  .quests-section { margin-top: 28px; padding-top: 20px; }
  .quest-item { padding: 12px 14px; gap: 12px; }
  .quest-right { min-width: 70px; }
  .quest-claim-btn { font-size: 0.68rem; padding: 5px 12px; }
  .quest-bar-wrap { flex-direction: column; align-items: flex-start; gap: 4px; }
  .quest-count { text-align: left; }

  .badges-grid { gap: 8px; }
  .badge-item { width: 64px; padding: 8px 4px; }
  .badge-item-icon { width: 28px; height: 28px; font-size: 0.7rem; }
  .badge-item-label { font-size: 0.65rem; max-width: 56px; }
}

/* ══════════════════════════════════════════════
   STREAK REMINDER
   ══════════════════════════════════════════════ */

.streak-reminder {
  margin: -16px auto 24px;
  max-width: 640px;
  animation: streak-slide-down .4s cubic-bezier(.22,1,.36,1);
}

.streak-reminder-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(251,191,36,.06);
  border: 1px solid rgba(251,191,36,.15);
  border-radius: 10px;
}

.streak-reminder-icon {
  font-size: 18px;
  flex-shrink: 0;
  animation: streak-pulse 2s ease-in-out infinite;
}

.streak-reminder-icon i {
  color: #FBBF24;
}

.streak-reminder-text {
  flex: 1;
  font-size: .85rem;
  color: var(--gray);
  line-height: 1.4;
}

.streak-reminder-text strong {
  color: var(--white);
  font-weight: 600;
}

.streak-reminder-close {
  background: none;
  border: none;
  color: var(--dim);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
  transition: color .2s ease;
}

.streak-reminder-close:hover {
  color: var(--white);
}

@keyframes streak-slide-down {
  from {
    opacity: 0;
    transform: translateY(-12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes streak-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.12); }
}

/* ══════════════════════════════════════════════
   BADGE SHARE MODAL
   ══════════════════════════════════════════════ */

.badge-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(6, 9, 16, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  transition: opacity .3s ease;
}

.badge-modal-overlay.open {
  opacity: 1;
}

.badge-modal {
  width: 100%;
  max-width: 380px;
  background: #0F1117;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 24px 24px 28px;
  transform: translateY(12px) scale(.96);
  transition: transform .3s cubic-bezier(.22,1,.36,1);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.6);
  position: relative;
}

.badge-modal-overlay.open .badge-modal {
  transform: translateY(0) scale(1);
}

.badge-modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  color: #6B7280;
  cursor: pointer;
  font-size: 13px;
  transition: all .2s ease;
  z-index: 1;
}

.badge-modal-close:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #E5E7EB;
}

.badge-modal-preview {
  margin: 0 -8px 16px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.badge-modal-preview img {
  display: block;
  width: 100%;
  height: auto;
}

.badge-modal-info {
  text-align: center;
  margin-bottom: 20px;
}

.badge-modal-name {
  font-family: "Unbounded", sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: #E5E7EB;
  margin-bottom: 6px;
}

.badge-modal-name i {
  margin-right: 6px;
  background: linear-gradient(135deg, #a68af9, #3ABEFF);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.badge-modal-desc {
  font-size: 13px;
  color: #9CA3AF;
  line-height: 1.5;
}

.badge-modal-share {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 10px;
  background: linear-gradient(90deg, #a68af9, #3ABEFF);
  color: #0B0E14;
  font-family: "Montserrat", system-ui;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: transform .25s cubic-bezier(.22,1,.36,1), box-shadow .25s ease;
}

.badge-modal-share:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(58, 190, 255, 0.3);
}

.badge-modal-share:active {
  transform: scale(.97);
}

/* ══════════════════════════════════════════════
   10. UNIT EXPAND/COLLAPSE
   ══════════════════════════════════════════════ */

.unit-header {
  cursor: pointer;
  user-select: none;
}

.unit-chevron {
  margin-left: 8px;
  color: var(--muted);
  font-size: 0.7rem;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.unit.expanded .unit-chevron {
  transform: rotate(180deg);
  color: var(--gray);
}

.lesson-chain {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.22, 1, 0.36, 1),
              opacity 0.3s ease,
              padding 0.3s ease;
  opacity: 0;
  padding: 0 0 0 28px;
  margin: 0 0 0 17px;
}

.lesson-chain.expanded {
  max-height: 2000px;
  opacity: 1;
  padding: 8px 0 4px 28px;
}

.lesson-chain::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 1.5px;
  background: rgba(255,255,255,0.04);
  border-radius: 2px;
}

.lesson-chain.has-progress::before {
  background: linear-gradient(to bottom, var(--blue), rgba(255,255,255,0.03));
}

.unit-loading {
  padding: 24px 16px;
  text-align: center;
  color: var(--dim);
  font-size: 0.78rem;
}

.unit-loading i {
  margin-right: 6px;
}

/* ─── Complete unit styling ─── */
.unit.complete .unit-header {
  cursor: default;
}

.unit.complete .unit-chevron {
  display: none;
}

/* ══════════════════════════════════════════════
   11. MOBILE — DUOLINGO STYLE
   ══════════════════════════════════════════════ */

@media (max-width: 768px) {
  .learn-section {
    padding: 86px 12px 100px;
  }

  .learn-heading {
    font-size: 1.15rem;
  }

  .learn-subtitle {
    font-size: 0.72rem;
  }

  /* ─── Level Card ─── */
  .level-card {
    padding: 14px 16px;
    margin-bottom: 8px;
  }

  .level-badge-num {
    font-size: 1.15rem;
  }

  .level-badge-title {
    font-size: 0.7rem;
  }

  .level-xp-current {
    font-size: 0.72rem;
  }

  .level-xp-next {
    font-size: 0.58rem;
  }

  .level-bar-track {
    height: 6px;
  }

  /* ─── Top Row Stats ─── */
  .top-row {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 6px;
  }

  .stat-card {
    flex: 1;
    min-width: 0;
    flex-direction: column;
    gap: 4px;
    padding: 12px 6px;
  }

  .stat-card-icon {
    font-size: 1.1rem;
    width: 32px;
    height: 32px;
    border-radius: 8px;
  }

  .stat-card-value {
    font-size: 0.78rem;
  }

  .stat-card-label {
    font-size: 0.65rem;
  }

  .quests-card {
    flex: 1 1 100%;
    min-width: 0;
    padding: 10px 12px;
  }

  /* ─── Unit Headers ─── */
  .unit {
    margin-top: 20px;
  }

  .unit:first-of-type {
    margin-top: 16px;
  }

  .unit-header {
    gap: 10px;
    padding: 12px 14px;
  }

  .unit-icon-box {
    width: 30px;
    height: 30px;
    font-size: 0.82rem;
  }

  .unit-title {
    font-size: 0.78rem;
  }

  .unit-subtitle {
    font-size: 0.62rem;
  }

  .unit-ring-wrap {
    width: 32px;
    height: 32px;
  }

  .unit-ring-wrap svg {
    width: 32px;
    height: 32px;
  }

  .unit-ring-pct {
    font-size: 0.6rem;
  }

  .unit-badge {
    font-size: 0.6rem;
    padding: 1px 6px;
  }

  .unit-chevron {
    font-size: 0.6rem;
  }

  /* ─── Lesson Rows ─── */
  .lesson-row {
    padding: 14px 12px;
    margin-bottom: 3px;
    gap: 10px;
    min-height: 52px;
  }

  .lesson-dot {
    width: 18px;
    height: 18px;
    font-size: 0.55rem;
  }

  .lesson-name {
    font-size: 0.75rem;
  }

  .lesson-meta {
    font-size: 0.58rem;
    gap: 6px;
    flex-wrap: wrap;
  }

  .lesson-xp {
    font-size: 0.58rem;
  }

  .lesson-score {
    font-size: 0.58rem;
  }

  .lesson-steps {
    font-size: 0.55rem;
    gap: 4px;
  }

  .step-type {
    gap: 2px;
  }

  .step-dot {
    width: 4px;
    height: 4px;
  }

  /* ─── Lesson Chain ─── */
  .lesson-chain {
    margin: 0 0 0 14px;
  }

  .lesson-chain.expanded {
    max-height: 2000px;
    padding: 6px 0 2px 20px;
  }

  /* ─── Full-screen modal on mobile ─── */
  .modal-card {
    max-width: 100%;
    max-height: 100vh;
    border-radius: 0;
    border: none;
    height: 100vh;
    height: 100dvh;
    display: flex;
    flex-direction: column;
  }

  .lesson-modal.open {
    align-items: flex-end;
  }

  .modal-backdrop {
    background: rgba(0,0,0,0.85);
  }

  .modal-head {
    padding: 12px 14px;
  }

  .modal-head-title {
    font-size: 0.72rem;
  }

  .modal-head-unit {
    font-size: 0.65rem;
  }

  .modal-close {
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }

  .modal-body {
    padding: 16px 14px;
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
  }

  .modal-foot {
    padding: 10px 14px 14px;
  }

  .btn-next {
    padding: 10px 20px;
    font-size: 0.78rem;
  }

  /* ─── Section content ─── */
  .sec-title {
    font-size: 0.88rem;
  }

  .sec-content {
    font-size: 0.78rem;
  }

  .sec-bullets li {
    font-size: 0.76rem;
  }

  .q-text {
    font-size: 0.85rem;
  }

  .q-opt {
    font-size: 0.78rem;
    padding: 12px 14px;
  }

  .spot-argument {
    font-size: 0.8rem;
    padding: 12px 14px;
  }

  .scenario-bubble {
    font-size: 0.82rem;
    padding: 14px;
  }

  .ex-good, .ex-bad {
    font-size: 0.76rem;
    padding: 10px 12px;
  }

  /* ─── Quest compact card ─── */
  .quests-card-header {
    font-size: 0.62rem;
  }

  .qc-label {
    font-size: 0.62rem;
  }

  .qc-xp {
    font-size: 0.65rem;
  }

  /* ─── Badges ─── */
  .badges-section {
    margin-top: 28px;
    padding-top: 20px;
  }

  .badges-header h3 {
    font-size: 0.82rem;
  }

  /* ─── Completion screen ─── */
  .comp-title {
    font-size: 1rem;
  }

  .comp-sub {
    font-size: 0.72rem;
  }

  .comp-xp-num {
    font-size: 1.1rem;
  }

  /* ─── Auth card ─── */
  .auth-card {
    padding: 28px 20px 24px;
  }

  .auth-card-title {
    font-size: 0.9rem;
  }

  .auth-card-desc {
    font-size: 0.75rem;
  }
}

@media (max-width: 420px) {
  .learn-section {
    padding: 80px 8px 80px;
  }

  .stat-card {
    padding: 8px 4px;
  }

  .stat-card-icon {
    width: 26px;
    height: 26px;
    font-size: 0.9rem;
  }

  .stat-card-value {
    font-size: 0.7rem;
  }

  .lesson-row {
    padding: 12px 10px;
    min-height: 48px;
  }

  .unit-header {
    padding: 10px 12px;
  }
}

/* ══════════════════════════════════════════════
   ACHIEVEMENT CELEBRATION MODAL
   ══════════════════════════════════════════════ */

.achieve-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(8px);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.achieve-overlay.open { opacity: 1; }

.achieve-card {
  position: relative;
  width: 340px;
  max-width: 90vw;
  padding: 48px 32px 36px;
  background: linear-gradient(135deg, rgba(58,190,255,0.08) 0%, rgba(166,138,249,0.04) 50%, rgba(11,14,20,0.95) 100%);
  border: 1px solid rgba(58,190,255,0.15);
  border-radius: 24px;
  text-align: center;
  backdrop-filter: blur(12px);
  transform: scale(0.9) translateY(20px);
  transition: transform 0.4s cubic-bezier(0.22,1,0.36,1);
  overflow: hidden;
}
.achieve-overlay.open .achieve-card {
  transform: scale(1) translateY(0);
}

.achieve-glow {
  position: absolute;
  top: -60%;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(58,190,255,0.15) 0%, rgba(166,138,249,0.08) 40%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: achieve-glow-pulse 2.5s ease-in-out infinite;
}
@keyframes achieve-glow-pulse {
  0%, 100% { transform: translateX(-50%) scale(1); opacity: 0.6; }
  50% { transform: translateX(-50%) scale(1.15); opacity: 1; }
}

.achieve-icon {
  position: relative;
  width: 72px;
  height: 72px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  background: linear-gradient(135deg, rgba(58,190,255,0.12), rgba(166,138,249,0.08));
  border: 1px solid rgba(58,190,255,0.2);
  border-radius: 50%;
  color: #3ABEFF;
  animation: achieve-icon-bounce 0.6s cubic-bezier(0.34,1.56,0.64,1) 0.15s both;
}
@keyframes achieve-icon-bounce {
  0% { transform: scale(0); opacity: 0; }
  60% { transform: scale(1.15); }
  100% { transform: scale(1); opacity: 1; }
}

.achieve-label {
  position: relative;
  font-size: 0.62rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(58,190,255,0.6);
  margin-bottom: 4px;
}

.achieve-name {
  position: relative;
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(135deg, #3ABEFF, #a68af9);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}

.achieve-desc {
  position: relative;
  font-size: 0.78rem;
  color: var(--gray);
  margin-bottom: 28px;
  line-height: 1.4;
}

.achieve-actions {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.achieve-share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  color: var(--gray);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--text-font);
}
.achieve-share-btn:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(58,190,255,0.2);
  color: var(--blue);
}

.achieve-close-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  background: linear-gradient(135deg, #3ABEFF, #a68af9);
  border: none;
  border-radius: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.2s, box-shadow 0.2s;
  font-family: var(--text-font);
}
.achieve-close-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(58,190,255,0.2);
}

@media (max-width: 480px) {
  .achieve-card { padding: 36px 20px 28px; }
  .achieve-icon { width: 60px; height: 60px; font-size: 1.6rem; }
  .achieve-name { font-size: 1.05rem; }
}

/* ══════════════════════════════════════════════
   10. RESOURCES & GUIDES (visible without auth)
   ══════════════════════════════════════════════ */

.resources-section {
  margin-top: 32px;
  margin-bottom: 12px;
}

.resources-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.resources-header i {
  font-size: 0.9rem;
  color: var(--blue);
}

.resources-header h2 {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  margin: 0;
}

.resources-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.resource-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 20px 18px 18px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  text-decoration: none;
  overflow: hidden;
  transition: transform 0.35s cubic-bezier(0.22,1,0.36,1),
              border-color 0.35s ease,
              box-shadow 0.35s ease;
}

.resource-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--purple));
  opacity: 0;
  transition: opacity 0.35s ease;
}

.resource-card:hover {
  transform: translateY(-6px);
  border-color: rgba(58,190,255,0.2);
  box-shadow:
    0 16px 48px rgba(0,0,0,0.3),
    0 0 0 1px rgba(58,190,255,0.06);
}

.resource-card:hover::before {
  opacity: 1;
}

.resource-icon {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(58,190,255,0.1), rgba(166,138,249,0.08));
  color: var(--purple);
  font-size: 1rem;
  margin-bottom: 14px;
  flex-shrink: 0;
  transition: background 0.3s ease, transform 0.3s ease;
}

.resource-card:hover .resource-icon {
  background: linear-gradient(135deg, rgba(58,190,255,0.18), rgba(166,138,249,0.14));
  transform: scale(1.06);
}

.resource-card h3 {
  font-family: var(--heading-font);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
  line-height: 1.3;
}

.resource-card p {
  font-size: 0.7rem;
  color: var(--dim);
  line-height: 1.5;
  margin: 0;
  flex: 1;
}

.resource-card .card-arrow {
  position: absolute;
  bottom: 16px;
  right: 16px;
  font-size: 0.7rem;
  color: rgba(255,255,255,0.15);
  transition: color 0.3s ease, transform 0.3s ease;
}

.resource-card:hover .card-arrow {
  color: var(--blue);
  transform: translateX(3px);
}

@media (max-width: 700px) {
  .resources-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .resource-card {
    padding: 16px 14px 14px;
  }
}

@media (max-width: 480px) {
  .resources-grid {
    grid-template-columns: 1fr;
  }
}