:root {
  --bg: #f3f6f5;
  --surface: #ffffff;
  --surface-2: #edf4f2;
  --surface-3: #e3eeeb;
  --text: #172321;
  --muted: #667672;
  --line: #dce7e4;
  --primary: #0d6b64;
  --primary-strong: #084e49;
  --primary-soft: #d9f3ee;
  --accent: #efb25f;
  --danger: #bd423d;
  --danger-soft: #fde8e6;
  --success: #16835e;
  --success-soft: #def5ea;
  --warning: #9d691e;
  --warning-soft: #fff2d9;
  --shadow-sm: 0 8px 24px rgba(31, 65, 59, .07);
  --shadow-lg: 0 22px 55px rgba(24, 62, 56, .14);
  --radius-sm: 12px;
  --radius: 20px;
  --radius-lg: 28px;
  --sidebar: 270px;
  color-scheme: light;
}

html[data-theme="dark"] {
  --bg: #0c1514;
  --surface: #14201e;
  --surface-2: #1b2a27;
  --surface-3: #21332f;
  --text: #eaf4f1;
  --muted: #9db0ab;
  --line: #2b403b;
  --primary: #55c7b9;
  --primary-strong: #91e5da;
  --primary-soft: #173e39;
  --accent: #f5bf75;
  --danger: #ff8d86;
  --danger-soft: #3c2423;
  --success: #69d2a8;
  --success-soft: #16382e;
  --warning: #f4c778;
  --warning-soft: #392f1c;
  --shadow-sm: 0 8px 24px rgba(0, 0, 0, .18);
  --shadow-lg: 0 22px 55px rgba(0, 0, 0, .32);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}
button, input, select, textarea { font: inherit; }
button { color: inherit; }
button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, a:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--primary) 34%, transparent);
  outline-offset: 2px;
}
img { max-width: 100%; }
svg { display: block; }

.app-shell { min-height: 100vh; }
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sidebar);
  padding: 24px 18px;
  background: var(--surface);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  z-index: 30;
  transition: transform .25s ease;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 4px 8px 24px;
  text-decoration: none;
  color: var(--text);
}
.brand img { box-shadow: var(--shadow-sm); border-radius: 14px; }
.brand span { display: grid; gap: 2px; }
.brand strong { font-size: 1.08rem; letter-spacing: -.02em; }
.brand small { color: var(--muted); font-size: .73rem; }
.nav { display: grid; gap: 7px; }
.nav-item {
  border: 0;
  background: transparent;
  border-radius: 14px;
  padding: 12px 13px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  cursor: pointer;
  text-align: left;
  font-weight: 650;
  transition: background .2s ease, color .2s ease, transform .2s ease;
}
.nav-item:hover { background: var(--surface-2); color: var(--text); transform: translateX(2px); }
.nav-item.active { background: var(--primary-soft); color: var(--primary-strong); }
.nav-icon, .nav-icon svg, .icon-button svg, .menu-toggle svg, .theme-toggle svg { width: 20px; height: 20px; }
.sidebar-foot { margin-top: auto; display: grid; gap: 12px; }
.streak-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--warning-soft), var(--surface));
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--line));
}
.streak-mark {
  width: 36px; height: 36px; border-radius: 50%;
  background: radial-gradient(circle at 50% 70%, var(--accent) 0 25%, transparent 26%), linear-gradient(145deg, transparent 30%, var(--accent) 31% 65%, transparent 66%);
}
.streak-card div { display: grid; }
.streak-card small { color: var(--muted); font-size: .75rem; }
.theme-toggle {
  border: 1px solid var(--line);
  border-radius: 13px;
  padding: 11px 13px;
  display: flex; align-items: center; gap: 10px;
  background: var(--surface);
  cursor: pointer;
}

.main-content { margin-left: var(--sidebar); min-height: 100vh; padding: 0 34px 56px; }
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: 100px;
  display: flex;
  align-items: center;
  gap: 16px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 58%, transparent);
}
.topbar h1 { margin: 2px 0 0; font-size: clamp(1.45rem, 2vw, 2rem); letter-spacing: -.035em; }
.eyebrow { margin: 0; color: var(--primary); font-weight: 720; font-size: .77rem; letter-spacing: .06em; text-transform: uppercase; }
.topbar-actions { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.icon-button, .menu-toggle {
  width: 42px; height: 42px; border-radius: 13px;
  display: grid; place-items: center; border: 1px solid var(--line);
  background: var(--surface); cursor: pointer;
}
.menu-toggle { display: none; }
.profile-chip { display: flex; align-items: center; gap: 10px; padding: 6px 11px 6px 6px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); }
.profile-avatar { width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; color: #fff; background: var(--primary); font-size: .74rem; font-weight: 800; }
.profile-chip > span:last-child { display: grid; line-height: 1.15; }
.profile-chip strong { font-size: .82rem; }
.profile-chip small { color: var(--muted); font-size: .69rem; }

.view { display: none; animation: viewIn .35s ease both; }
.view.active { display: block; }
@keyframes viewIn { from { opacity: 0; transform: translateY(7px); } to { opacity: 1; transform: none; } }

.hero {
  border-radius: var(--radius-lg);
  padding: clamp(24px, 4vw, 44px);
  min-height: 330px;
  background:
    radial-gradient(circle at 82% 25%, rgba(255,255,255,.22) 0 8%, transparent 8.5%),
    radial-gradient(circle at 75% 62%, rgba(255,255,255,.12) 0 14%, transparent 14.5%),
    linear-gradient(135deg, #0d6b64 0%, #0a4e49 65%, #163b4b 100%);
  color: #fff;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, .8fr);
  align-items: center;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.hero-copy { max-width: 650px; }
.hero-badge svg { width: 17px; height: 17px; flex: 0 0 auto; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; padding: 7px 11px; border-radius: 999px; background: rgba(255,255,255,.13); border: 1px solid rgba(255,255,255,.2); font-size: .78rem; font-weight: 700; }
.hero h2 { font-size: clamp(2rem, 4vw, 3.6rem); line-height: .98; letter-spacing: -.055em; margin: 20px 0 16px; }
.hero p { margin: 0; max-width: 620px; color: rgba(255,255,255,.79); line-height: 1.7; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 11px; margin-top: 25px; }
.hero-visual { min-height: 250px; position: relative; display: grid; place-items: center; }
.orbit { width: min(270px, 85%); aspect-ratio: 1; border-radius: 50%; border: 1px solid rgba(255,255,255,.24); position: relative; animation: float 5s ease-in-out infinite; }
.orbit::before, .orbit::after { content: ""; position: absolute; border-radius: 50%; border: 1px solid rgba(255,255,255,.18); inset: 16%; }
.orbit::after { inset: 31%; background: rgba(255,255,255,.12); }
.orbit-card { position: absolute; width: 118px; padding: 14px; border-radius: 18px; background: rgba(255,255,255,.91); color: #123c38; box-shadow: 0 16px 34px rgba(0,0,0,.18); }
.orbit-card strong { display: block; font-size: 1.2rem; }
.orbit-card small { color: #5f7571; }
.orbit-card.one { left: -18px; top: 25px; transform: rotate(-5deg); }
.orbit-card.two { right: -20px; bottom: 31px; transform: rotate(6deg); }
@keyframes float { 50% { transform: translateY(-8px); } }

.btn {
  border: 1px solid transparent;
  border-radius: 13px;
  min-height: 44px;
  padding: 10px 17px;
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-weight: 760;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
  text-decoration: none;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { color: #fff; background: var(--primary); box-shadow: 0 9px 20px color-mix(in srgb, var(--primary) 24%, transparent); }
.btn-primary:hover { background: var(--primary-strong); }
.hero .btn-primary { background: #fff; color: #0a514b; }
.btn-secondary { background: var(--surface); border-color: var(--line); color: var(--text); }
.hero .btn-secondary { background: rgba(255,255,255,.1); color: #fff; border-color: rgba(255,255,255,.28); }
.btn-ghost { background: transparent; border-color: var(--line); }
.btn-danger { background: var(--danger-soft); color: var(--danger); border-color: color-mix(in srgb, var(--danger) 15%, var(--line)); }
.btn-sm { min-height: 36px; padding: 7px 11px; border-radius: 11px; font-size: .82rem; }
.btn svg { width: 18px; height: 18px; }

.section-head { display: flex; justify-content: space-between; align-items: end; gap: 20px; margin: 35px 0 17px; }
.section-head h2, .section-head h3 { margin: 0; letter-spacing: -.03em; }
.section-head p { color: var(--muted); margin: 6px 0 0; }
.link-button { border: 0; background: transparent; color: var(--primary); font-weight: 750; cursor: pointer; }

.stats-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 16px; margin-top: 20px; }
.stat-card { padding: 20px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.stat-top { display: flex; align-items: center; justify-content: space-between; color: var(--muted); font-size: .8rem; }
.stat-icon { width: 38px; height: 38px; border-radius: 12px; display: grid; place-items: center; background: var(--primary-soft); color: var(--primary); }
.stat-icon svg { width: 19px; height: 19px; }
.stat-value { display: block; margin-top: 20px; font-size: 1.75rem; font-weight: 820; letter-spacing: -.04em; }
.stat-caption { margin-top: 4px; color: var(--muted); font-size: .78rem; }

.action-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; }
.action-card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); overflow: hidden; box-shadow: var(--shadow-sm); cursor: pointer; text-align: left; padding: 0; }
.action-card-visual { height: 145px; display: grid; place-items: center; background: linear-gradient(145deg, var(--primary-soft), var(--surface-3)); }
.action-card-visual svg { width: 64px; height: 64px; color: var(--primary); }
.action-card-body { padding: 18px; }
.action-card h3 { margin: 0; font-size: 1rem; }
.action-card p { color: var(--muted); line-height: 1.55; font-size: .84rem; margin: 8px 0 0; }

.toolbar { display: flex; flex-wrap: wrap; gap: 11px; align-items: center; margin-bottom: 20px; }
.search-wrap { flex: 1 1 280px; position: relative; }
.search-wrap svg { position: absolute; left: 14px; top: 50%; width: 18px; height: 18px; color: var(--muted); transform: translateY(-50%); }
.search-wrap input { width: 100%; min-height: 46px; padding: 10px 14px 10px 42px; border-radius: 13px; background: var(--surface); color: var(--text); border: 1px solid var(--line); }
.select { min-height: 46px; padding: 9px 36px 9px 13px; border: 1px solid var(--line); border-radius: 13px; background: var(--surface); color: var(--text); }
.toolbar-meta { color: var(--muted); font-size: .82rem; margin-left: auto; }

.verb-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 16px; }
.verb-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); transition: transform .2s ease, box-shadow .2s ease; }
.verb-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.verb-image-wrap { position: relative; aspect-ratio: 16/10; overflow: hidden; background: var(--surface-2); }
.verb-image { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .4s ease; }
.verb-card:hover .verb-image { transform: scale(1.035); }
.verb-badges { position: absolute; top: 10px; left: 10px; right: 10px; display: flex; justify-content: space-between; pointer-events: none; }
.badge { display: inline-flex; align-items: center; min-height: 25px; padding: 4px 8px; border-radius: 999px; background: color-mix(in srgb, var(--surface) 90%, transparent); color: var(--text); backdrop-filter: blur(8px); font-size: .67rem; font-weight: 780; border: 1px solid color-mix(in srgb, var(--line) 70%, transparent); }
.level-A1 { background: var(--success-soft); color: var(--success); }
.level-A2 { background: var(--primary-soft); color: var(--primary-strong); }
.level-B1 { background: var(--warning-soft); color: var(--warning); }
.level-B2 { background: var(--danger-soft); color: var(--danger); }
.verb-body { padding: 16px; }
.verb-title-row { display: flex; justify-content: space-between; align-items: start; gap: 10px; }
.verb-title-row h3 { margin: 0; font-size: 1.18rem; letter-spacing: -.025em; }
.verb-title-row p { margin: 3px 0 0; color: var(--primary); font-weight: 700; font-size: .86rem; }
.card-icon-button { width: 34px; height: 34px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 11px; background: var(--surface); cursor: pointer; }
.card-icon-button.active { color: var(--danger); background: var(--danger-soft); }
.card-icon-button svg { width: 17px; height: 17px; }
.verb-example { min-height: 43px; margin: 14px 0; color: var(--muted); line-height: 1.5; font-size: .78rem; }
.verb-actions { display: flex; gap: 8px; }
.verb-actions .btn { flex: 1; }
.pagination { display: flex; justify-content: center; gap: 7px; margin-top: 26px; flex-wrap: wrap; }
.page-btn { min-width: 39px; height: 39px; border: 1px solid var(--line); border-radius: 11px; background: var(--surface); cursor: pointer; }
.page-btn.active { color: #fff; background: var(--primary); border-color: var(--primary); }
.empty-state { padding: 50px 20px; text-align: center; border: 1px dashed var(--line); border-radius: var(--radius); background: var(--surface); }
.empty-state svg { margin: 0 auto 14px; width: 44px; height: 44px; color: var(--muted); }
.empty-state h3 { margin: 0; }
.empty-state p { color: var(--muted); }

.practice-layout { display: grid; grid-template-columns: 260px minmax(0,1fr); gap: 20px; }
.mode-panel, .practice-card, .story-list-panel, .story-studio, .progress-panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.mode-panel { padding: 15px; align-self: start; position: sticky; top: 118px; }
.mode-panel h3 { margin: 4px 5px 13px; font-size: .9rem; }
.mode-list { display: grid; gap: 7px; }
.mode-button { border: 1px solid transparent; background: transparent; border-radius: 12px; padding: 11px; text-align: left; cursor: pointer; display: flex; gap: 10px; align-items: center; color: var(--muted); }
.mode-button svg { width: 18px; height: 18px; }
.mode-button.active { background: var(--primary-soft); color: var(--primary-strong); border-color: color-mix(in srgb, var(--primary) 15%, transparent); }
.practice-card { min-height: 530px; padding: clamp(20px, 4vw, 38px); }
.practice-header { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.progress-track { height: 8px; flex: 1; max-width: 430px; background: var(--surface-3); border-radius: 999px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--primary); border-radius: inherit; transition: width .3s ease; }
.practice-count { font-size: .8rem; color: var(--muted); white-space: nowrap; }
.question-area { max-width: 760px; margin: 34px auto 0; }
.question-label { color: var(--primary); text-transform: uppercase; letter-spacing: .08em; font-weight: 800; font-size: .72rem; }
.question-title { font-size: clamp(1.65rem, 3vw, 2.5rem); letter-spacing: -.045em; margin: 9px 0 24px; }
.question-image { width: 100%; max-height: 300px; object-fit: cover; border-radius: 18px; background: var(--surface-2); }
.options { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 11px; margin-top: 20px; }
.option { min-height: 58px; padding: 13px 15px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); cursor: pointer; font-weight: 680; text-align: left; transition: border .18s ease, background .18s ease; }
.option:hover { border-color: var(--primary); background: var(--primary-soft); }
.option.correct { background: var(--success-soft); border-color: var(--success); color: var(--success); }
.option.wrong { background: var(--danger-soft); border-color: var(--danger); color: var(--danger); }
.answer-input-row { display: flex; gap: 10px; margin-top: 20px; }
.answer-input { flex: 1; min-height: 52px; padding: 12px 15px; border: 1px solid var(--line); border-radius: 13px; color: var(--text); background: var(--surface); }
.feedback { display: none; margin-top: 20px; border-radius: 14px; padding: 15px; line-height: 1.55; }
.feedback.show { display: block; animation: viewIn .25s ease; }
.feedback.success { background: var(--success-soft); color: var(--success); }
.feedback.error { background: var(--danger-soft); color: var(--danger); }
.practice-footer { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 22px; }
.score-chip { padding: 8px 11px; border-radius: 999px; background: var(--surface-2); color: var(--muted); font-size: .8rem; }

.story-layout { display: grid; grid-template-columns: 330px minmax(0,1fr); gap: 20px; align-items: start; }
.story-list-panel { max-height: calc(100vh - 135px); overflow: auto; padding: 12px; position: sticky; top: 116px; }
.story-list { display: grid; gap: 8px; }
.story-list-item { width: 100%; padding: 13px; border: 1px solid transparent; border-radius: 14px; background: transparent; text-align: left; cursor: pointer; }
.story-list-item:hover { background: var(--surface-2); }
.story-list-item.active { background: var(--primary-soft); border-color: color-mix(in srgb, var(--primary) 22%, transparent); }
.story-index { color: var(--primary); font-size: .68rem; font-weight: 820; letter-spacing: .08em; text-transform: uppercase; }
.story-list-item h3 { margin: 5px 0 7px; font-size: .91rem; }
.story-meta { display: flex; gap: 7px; flex-wrap: wrap; color: var(--muted); font-size: .69rem; }
.story-studio { padding: clamp(20px, 3vw, 34px); min-height: 680px; }
.story-studio-head { display: flex; justify-content: space-between; gap: 20px; align-items: start; }
.story-studio-head h2 { margin: 4px 0 8px; letter-spacing: -.035em; }
.story-studio-head p { margin: 0; color: var(--muted); }
.player { margin-top: 25px; border: 1px solid var(--line); border-radius: 18px; background: var(--surface-2); padding: 18px; }
.player-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; }
.player-main { width: 48px; height: 48px; border-radius: 50%; border: 0; background: var(--primary); color: #fff; display: grid; place-items: center; cursor: pointer; }
.player-main svg { width: 21px; height: 21px; }
.player-status { margin-left: 4px; min-width: 130px; }
.player-status strong { display: block; font-size: .83rem; }
.player-status small { color: var(--muted); }
.player-controls .select { min-height: 40px; margin-left: auto; }
.sentence-progress { margin-top: 15px; display: flex; gap: 5px; }
.sentence-dot { height: 5px; flex: 1; border-radius: 999px; background: var(--surface-3); }
.sentence-dot.done { background: var(--success); }
.sentence-dot.current { background: var(--accent); animation: pulse 1s infinite; }
@keyframes pulse { 50% { opacity: .45; } }
.dictation-area { margin-top: 24px; }
.dictation-area label { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 9px; font-weight: 760; }
.dictation-area label small { color: var(--muted); font-weight: 500; }
.dictation-textarea { width: 100%; min-height: 250px; padding: 17px; resize: vertical; border-radius: 16px; border: 1px solid var(--line); background: var(--surface); color: var(--text); line-height: 1.75; }
.dictation-actions { margin-top: 13px; display: flex; justify-content: flex-end; gap: 10px; }
.result-panel { display: none; margin-top: 22px; border-top: 1px solid var(--line); padding-top: 22px; }
.result-panel.show { display: block; animation: viewIn .3s ease; }
.result-summary { display: grid; grid-template-columns: 130px 1fr; gap: 18px; align-items: center; }
.accuracy-ring { width: 120px; height: 120px; border-radius: 50%; display: grid; place-items: center; background: conic-gradient(var(--primary) var(--score), var(--surface-3) 0); position: relative; }
.accuracy-ring::before { content: ""; position: absolute; inset: 12px; border-radius: 50%; background: var(--surface); }
.accuracy-ring span { position: relative; z-index: 1; font-size: 1.4rem; font-weight: 850; }
.result-summary h3 { margin: 0 0 8px; }
.result-summary p { color: var(--muted); margin: 0; line-height: 1.55; }
.diff-box { margin-top: 19px; border-radius: 15px; padding: 16px; background: var(--surface-2); line-height: 2.05; }
.diff-token { display: inline; border-radius: 5px; padding: 2px 3px; margin-right: 2px; }
.diff-token.correct { color: var(--text); }
.diff-token.wrong, .diff-token.extra { color: var(--danger); background: var(--danger-soft); text-decoration: line-through; }
.diff-token.missing { color: var(--success); background: var(--success-soft); border-bottom: 2px solid var(--success); }
.translation-block { margin-top: 18px; display: grid; gap: 10px; }
.sentence-pair { padding: 14px; border: 1px solid var(--line); border-radius: 13px; background: var(--surface); }
.sentence-pair .fi { margin: 0; font-weight: 700; line-height: 1.55; }
.sentence-pair .tr { margin: 7px 0 0; color: var(--muted); line-height: 1.5; }
.current-sentence { margin-top: 14px; min-height: 48px; padding: 12px 14px; border-radius: 12px; border: 1px dashed var(--line); color: var(--muted); font-size: .82rem; }
.current-sentence.active { border-style: solid; color: var(--primary-strong); background: var(--primary-soft); }

.progress-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 20px; }
.progress-panel { padding: 22px; }
.progress-panel h3 { margin: 0 0 18px; }
.metric-row { display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: center; margin: 15px 0; }
.metric-row p { margin: 0; font-size: .84rem; }
.metric-row strong { font-size: .82rem; }
.metric-bar { grid-column: 1 / -1; height: 8px; background: var(--surface-3); border-radius: 99px; overflow: hidden; }
.metric-bar span { display: block; height: 100%; background: var(--primary); border-radius: inherit; }
.activity-list { display: grid; gap: 10px; }
.activity-item { display: flex; align-items: center; gap: 11px; padding: 11px; border-radius: 13px; background: var(--surface-2); }
.activity-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--primary); }
.activity-item div { display: grid; flex: 1; }
.activity-item small { color: var(--muted); margin-top: 2px; }
.reset-zone { margin-top: 20px; border-top: 1px solid var(--line); padding-top: 18px; }

.verb-dialog { width: min(660px, calc(100vw - 32px)); padding: 0; border: 1px solid var(--line); border-radius: 24px; color: var(--text); background: var(--surface); box-shadow: var(--shadow-lg); }
.verb-dialog::backdrop { background: rgba(4, 19, 17, .55); backdrop-filter: blur(4px); }
.dialog-image { width: 100%; aspect-ratio: 16/7; object-fit: cover; background: var(--surface-2); }
.dialog-body { padding: 24px; }
.dialog-top { display: flex; justify-content: space-between; align-items: start; gap: 15px; }
.dialog-top h2 { margin: 0; font-size: 2rem; letter-spacing: -.04em; }
.dialog-top p { color: var(--primary); margin: 4px 0 0; font-weight: 750; }
.dialog-close { width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); display: grid; place-items: center; cursor: pointer; }
.dialog-close svg { width: 18px; height: 18px; }
.detail-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 10px; margin: 19px 0; }
.detail-cell { padding: 12px; border-radius: 13px; background: var(--surface-2); }
.detail-cell small { display: block; color: var(--muted); font-size: .68rem; text-transform: uppercase; letter-spacing: .06em; }
.detail-cell strong { display: block; margin-top: 5px; font-size: .85rem; }
.example-box { border-left: 3px solid var(--primary); padding: 11px 14px; background: var(--primary-soft); border-radius: 0 12px 12px 0; }
.example-box p { margin: 0; line-height: 1.55; }
.example-box p + p { margin-top: 6px; color: var(--muted); font-size: .84rem; }
.dialog-actions { margin-top: 20px; display: flex; flex-wrap: wrap; gap: 9px; }

.toast-region { position: fixed; right: 20px; bottom: 20px; z-index: 100; display: grid; gap: 10px; width: min(360px, calc(100vw - 40px)); }
.toast { padding: 13px 15px; border-radius: 13px; background: var(--text); color: var(--surface); box-shadow: var(--shadow-lg); animation: toastIn .25s ease both; font-size: .84rem; }
@keyframes toastIn { from { opacity: 0; transform: translateY(8px); } }

.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; }
.muted { color: var(--muted); }
.kicker { color: var(--primary); font-size: .74rem; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.inline-note { border: 1px solid var(--line); background: var(--surface-2); border-radius: 13px; padding: 12px; color: var(--muted); line-height: 1.5; font-size: .8rem; }

@media (max-width: 1180px) {
  .verb-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
  .stats-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .story-layout { grid-template-columns: 285px minmax(0,1fr); }
}
@media (max-width: 930px) {
  .sidebar { transform: translateX(-102%); box-shadow: var(--shadow-lg); }
  .sidebar.open { transform: none; }
  .main-content { margin-left: 0; padding-inline: 20px; }
  .menu-toggle { display: grid; }
  .hero { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .verb-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .practice-layout, .story-layout, .progress-grid { grid-template-columns: 1fr; }
  .mode-panel, .story-list-panel { position: static; max-height: none; }
  .mode-list { grid-template-columns: repeat(3, minmax(0,1fr)); }
  .story-list { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 650px) {
  .main-content { padding: 0 14px 35px; }
  .topbar { min-height: 82px; }
  .topbar .eyebrow, .profile-chip > span:last-child { display: none; }
  .profile-chip { padding-right: 6px; }
  .hero { min-height: 390px; padding: 25px 21px; }
  .hero h2 { font-size: 2.35rem; }
  .stats-grid, .action-grid, .verb-grid, .story-list, .options { grid-template-columns: 1fr; }
  .mode-list { grid-template-columns: 1fr 1fr; }
  .toolbar > .select { flex: 1 1 140px; }
  .toolbar-meta { width: 100%; margin-left: 0; }
  .practice-card, .story-studio { padding: 18px; }
  .answer-input-row { flex-direction: column; }
  .story-studio-head { flex-direction: column; }
  .player-controls .select { width: 100%; margin-left: 0; }
  .result-summary { grid-template-columns: 1fr; text-align: center; }
  .accuracy-ring { margin: auto; }
  .detail-grid { grid-template-columns: 1fr; }
}

/* Verified, gradual verb lesson system */
.image-pending {
  min-height: 190px;
  display: grid;
  place-items: center;
  padding: 24px;
  text-align: center;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--primary) 8%, transparent), transparent),
    var(--surface-2);
  color: var(--muted);
  font-size: .86rem;
  line-height: 1.45;
}

.lesson-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: linear-gradient(135deg, var(--surface), color-mix(in srgb, var(--primary) 7%, var(--surface)));
  box-shadow: var(--shadow-sm);
}

.lesson-hero h2 {
  margin: 8px 0 10px;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1;
  letter-spacing: -.045em;
}

.lesson-hero p {
  max-width: 760px;
  margin: 0;
  color: var(--muted);
  font-size: 1.03rem;
  line-height: 1.7;
}

.lesson-summary {
  min-width: 190px;
  padding: 22px;
  border-radius: 22px;
  background: var(--primary);
  color: white;
  text-align: center;
}

.lesson-summary strong {
  display: block;
  font-size: 2rem;
}

.lesson-summary span {
  display: block;
  margin-top: 4px;
  opacity: .82;
  font-size: .86rem;
}

.lesson-quality-note {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 18px 0;
  padding: 14px 17px;
  border: 1px solid color-mix(in srgb, var(--success) 34%, var(--line));
  border-radius: 16px;
  background: color-mix(in srgb, var(--success) 9%, var(--surface));
  color: var(--text);
  font-size: .92rem;
}

.lesson-quality-note svg { width: 19px; height: 19px; color: var(--success); flex: 0 0 auto; }

.lesson-map {
  display: grid;
  gap: 16px;
}

.lesson-card {
  display: grid;
  grid-template-columns: 70px minmax(0, 1fr) 180px auto;
  align-items: center;
  gap: 22px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.lesson-card.completed {
  border-color: color-mix(in srgb, var(--success) 45%, var(--line));
}

.lesson-card.locked {
  grid-template-columns: 90px minmax(0, 1fr) auto;
  opacity: .78;
  background: var(--surface-2);
}

.lesson-number {
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border-radius: 18px;
  background: color-mix(in srgb, var(--primary) 11%, var(--surface));
  color: var(--primary);
  font-weight: 850;
}

.lesson-card h3 {
  margin: 4px 0;
  font-size: 1.35rem;
}

.lesson-card p {
  margin: 0;
  color: var(--muted);
}

.lesson-word-row {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 12px;
}

.lesson-word-row span {
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-2);
  font-size: .78rem;
  font-weight: 750;
}

.lesson-word-row.large {
  justify-content: center;
  margin: 24px 0;
}

.lesson-word-row.large span { font-size: .9rem; padding: 9px 12px; }

.lesson-card-photo {
  overflow: hidden;
  height: 112px;
  border-radius: 18px;
  background: var(--surface-2);
}

.lesson-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.lesson-lock {
  max-width: 220px;
  padding: 10px 13px;
  border-radius: 14px;
  background: var(--surface);
  color: var(--muted);
  font-size: .8rem;
  text-align: center;
}

.lesson-player {
  max-width: 980px;
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: var(--shadow-lg);
}

.lesson-player-head,
.lesson-player-foot {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 22px;
}

.lesson-player-head {
  border-bottom: 1px solid var(--line);
}

.lesson-player-head .progress-track { flex: 1; }
.lesson-player-head > span { color: var(--muted); font-weight: 750; white-space: nowrap; }

.lesson-player-foot {
  justify-content: space-between;
  border-top: 1px solid var(--line);
  background: var(--surface-2);
}

.lesson-stage {
  min-height: 610px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 34px clamp(22px, 5vw, 64px);
}

.teach-card {
  display: grid;
  grid-template-columns: minmax(280px, 1.15fr) minmax(240px, .85fr);
  gap: 28px;
  align-items: center;
}

.teach-card > .question-label,
.teach-sentence {
  grid-column: 1 / -1;
}

.teach-photo-wrap {
  position: relative;
  overflow: hidden;
  border-radius: 24px;
  background: var(--surface-2);
}

.teach-photo {
  width: 100%;
  height: 380px;
  object-fit: cover;
  display: block;
}

.photo-source {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(10, 18, 18, .72);
  color: white;
  font-size: .72rem;
  text-decoration: none;
  backdrop-filter: blur(8px);
}

.teach-copy h2 {
  margin: 0;
  font-size: clamp(3rem, 7vw, 5.6rem);
  line-height: .95;
  letter-spacing: -.055em;
}

.teach-copy > strong {
  display: block;
  margin: 12px 0 22px;
  color: var(--primary);
  font-size: 1.45rem;
}

.sound-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid color-mix(in srgb, var(--primary) 35%, var(--line));
  border-radius: 999px;
  background: color-mix(in srgb, var(--primary) 8%, var(--surface));
  color: var(--primary);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.sound-pill svg { width: 19px; height: 19px; }
.sound-pill.centered { align-self: center; margin: -2px auto 20px; }

.teach-sentence {
  display: grid;
  gap: 5px;
  padding: 18px 20px;
  border-left: 4px solid var(--primary);
  border-radius: 0 16px 16px 0;
  background: var(--surface-2);
}

.teach-sentence span { font-size: 1.2rem; font-weight: 800; }
.teach-sentence small { color: var(--muted); font-size: .95rem; }

.photo-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.photo-option {
  position: relative;
  overflow: hidden;
  min-height: 230px;
  padding: 0;
  border: 3px solid transparent;
  border-radius: 20px;
  background: var(--surface-2);
  cursor: pointer;
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.photo-option:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.photo-option.correct { border-color: var(--success); }
.photo-option.wrong { border-color: var(--danger); }
.photo-option:disabled { cursor: default; }

.photo-option-image {
  width: 100%;
  height: 100%;
  min-height: 230px;
  object-fit: cover;
  display: block;
}

.verified-question-image {
  max-width: 760px;
  height: 330px;
  margin: 0 auto 22px;
  border-radius: 22px;
  object-fit: cover;
}

.sentence-learning-card {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 22px;
  align-items: center;
  max-width: 780px;
  margin: 0 auto 24px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface-2);
}

.sentence-photo {
  width: 100%;
  height: 160px;
  border-radius: 15px;
  object-fit: cover;
}

.sentence-learning-card strong { display: block; font-size: 1.45rem; }
.sentence-learning-card small { display: block; margin-top: 9px; color: var(--muted); }

.lesson-complete {
  max-width: 760px;
  min-height: 590px;
  margin: 0 auto;
  display: grid;
  place-items: center;
  align-content: center;
  padding: 44px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--surface);
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.lesson-complete .stat-icon {
  width: 72px;
  height: 72px;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
}

.lesson-complete .stat-icon svg { width: 38px; height: 38px; }
.lesson-complete h2 { margin: 8px 0; font-size: 3.2rem; }
.lesson-complete > p { max-width: 580px; color: var(--muted); line-height: 1.7; }

@media (max-width: 900px) {
  .lesson-card { grid-template-columns: 58px minmax(0, 1fr) auto; }
  .lesson-card-photo { display: none; }
  .lesson-card.locked { grid-template-columns: 58px minmax(0, 1fr); }
  .lesson-card.locked .lesson-lock { grid-column: 2; }
  .teach-card { grid-template-columns: 1fr; }
  .teach-card > .question-label, .teach-sentence { grid-column: auto; }
  .teach-photo { height: 330px; }
}

@media (max-width: 680px) {
  .lesson-hero { grid-template-columns: 1fr; padding: 24px; }
  .lesson-summary { min-width: 0; }
  .lesson-card { grid-template-columns: 48px minmax(0, 1fr); gap: 14px; }
  .lesson-card .btn { grid-column: 1 / -1; width: 100%; }
  .lesson-card.locked { grid-template-columns: 48px minmax(0, 1fr); }
  .lesson-stage { min-height: 540px; padding: 24px 16px; }
  .lesson-player-head, .lesson-player-foot { padding: 14px; }
  .lesson-player-foot { align-items: stretch; flex-direction: column; }
  .lesson-player-foot .btn { width: 100%; }
  .teach-photo { height: 260px; }
  .teach-copy h2 { font-size: 3.5rem; }
  .photo-options { grid-template-columns: 1fr 1fr; gap: 9px; }
  .photo-option, .photo-option-image { min-height: 150px; }
  .verified-question-image { height: 260px; }
  .sentence-learning-card { grid-template-columns: 1fr; }
  .sentence-photo { height: 190px; }
  .lesson-complete { padding: 28px 18px; }
}