/* =====================================================================
   MUNHWAO MASTERY  -  Duolingo 1:1 light UI
   Every class hook the engine uses is kept; only the look changes.
   ===================================================================== */
:root {
  --green: #58cc02;
  --green-dark: #46a302;
  --green-light: #89e219;
  --blue: #1cb0f6;
  --blue-dark: #1899d6;
  --blue-light: #ddf4ff;
  --purple: #ce82ff;
  --red: #ff4b4b;
  --red-dark: #ea2b2b;
  --orange: #ff9600;
  --gold: #ffc800;
  --pink: #ff86d0;
  --teal: #00cd9c;
  --correct-bg: #d7ffb8;
  --wrong-bg: #ffdfe0;
  --bg: #ffffff;
  --bg-light: #ffffff;
  --surface: #f7f7f7;
  --surface2: #eef2f4;
  --surface3: #e5e8ea;
  --border: var(--border);
  --text: #3c3c3c;
  --text-dim: #777777;
  --shadow: rgba(0, 0, 0, 0.10);
  --panel: #ffffff;
  --on-color: #ffffff;
  --border-strong: #d5d5d5;
  --muted: #a9a9a9;
  --disabled: #e5e5e5;
  --disabled-text: #a5a5a5;
  --disabled-border: #d0d0d0;
  --radius: 16px;
  --radius-sm: 12px;
  --radius-xs: 8px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; }
body {
  font-family: 'Nunito', 'DIN Round Pro', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex; flex-direction: column;
  overflow-x: hidden;
}
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; }
.hidden { display: none !important; }

/* tier accent color (shared by skill circles + banner icon) */
[class~="tier1"]  { --tc: var(--green); }
[class~="tier2"]  { --tc: var(--blue); }
[class~="tier3"]  { --tc: var(--purple); }
[class~="tier4"]  { --tc: var(--orange); }
[class~="tier5"]  { --tc: var(--red); }
[class~="tier6"]  { --tc: var(--teal); }
[class~="tier7"]  { --tc: var(--pink); }
[class~="tier8"]  { --tc: var(--gold); }
[class~="tier9"]  { --tc: var(--purple); }
[class~="tier10"] { --tc: var(--blue); }
[class~="tier11"] { --tc: var(--green); }
[class~="tier12"] { --tc: var(--orange); }
[class~="tier13"] { --tc: var(--red); }
[class~="tier14"] { --tc: var(--teal); }
[class~="tier15"] { --tc: var(--pink); }
[class~="tier16"] { --tc: var(--gold); }
[class~="tier17"] { --tc: var(--purple); }
[class~="tier18"] { --tc: var(--blue); }
[class~="tier19"] { --tc: var(--green); }
[class~="tier20"] { --tc: var(--red); }

/* ===== TOP BAR ===== */
.topbar {
  position: relative; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 22px;
  background: var(--panel);
  border-bottom: 2px solid var(--border);
  gap: 12px;
}
.logo { font-weight: 900; font-size: 1.15rem; color: var(--green); letter-spacing: 0.3px; text-transform: uppercase; white-space: nowrap; }
.logo-sub { display: block; font-size: 0.55rem; font-weight: 900; color: var(--text-dim); letter-spacing: 2px; }
.stats { display: flex; gap: 8px; align-items: center; }
.stat-chip {
  display: flex; align-items: center; gap: 5px; padding: 6px 12px;
  background: var(--surface); border: 2px solid var(--border);
  border-radius: 12px; font-weight: 900; font-size: 0.9rem; color: var(--text);
}
.stat-chip svg { width: 16px; height: 16px; flex-shrink: 0; }
.stat-chip.streak { color: var(--orange); border-color: #ffcd9a; }
.stat-chip.xp { color: var(--blue); border-color: #8ad8ff; }
.stat-chip.hearts { color: var(--red); border-color: #ffb0b0; }
.nav-links { display: flex; gap: 6px; }
.nav-link {
  background: var(--panel); border: 2px solid var(--border); color: var(--text);
  padding: 8px 16px; border-radius: 12px; font-weight: 900; font-size: 0.85rem;
}
.nav-link:hover { border-color: var(--blue); color: var(--blue); }
.nav-link.active { border-color: var(--green); color: var(--green); }

/* ===== MAIN / PAGE ===== */
.page { display: none; max-width: 900px; margin: 0 auto; padding: 0 20px 70px; width: 100%; flex: 1; }
.page.active { display: block; }
.page-heading { text-align: center; margin: 24px 0 18px; }
.page-heading h1 { font-size: 1.55rem; font-weight: 900; }
.page-heading p { color: var(--text-dim); margin-top: 6px; font-size: 0.95rem; }

/* ===== BANNER / NEXT-LESSON CARD ===== */
.banner {
  display: flex; align-items: center; gap: 14px; margin: 20px 0 6px;
  background: var(--panel); border: 2px solid var(--border); border-radius: 16px; padding: 14px 18px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.banner-icon {
  width: 54px; height: 54px; border-radius: 50%; flex-shrink: 0;
  color: var(--on-color); font-weight: 900; font-size: 1.15rem;
  display: flex; align-items: center; justify-content: center;
  background: var(--tc, var(--green));
  border-bottom: 4px solid rgba(0,0,0,0.18);
}
.banner-title { font-weight: 900; font-size: 1.02rem; }
.banner-sub { color: var(--text-dim); font-size: 0.85rem; margin-top: 2px; }
.banner-cta { margin-left: auto; }
.placement-box { text-align: center; margin: 12px 0 4px; padding: 10px; }
.placement-box p { color: var(--text-dim); margin-bottom: 10px; font-size: 0.9rem; }

/* ===== SKILL PATH ===== */
.tier { margin-bottom: 16px; }
.tier-label { display: flex; align-items: center; gap: 10px; margin-bottom: 2px; }
.tier-badge {
  padding: 3px 12px; border-radius: 20px; font-weight: 900; font-size: 0.68rem;
  color: var(--on-color); text-transform: uppercase;
}
.tier-title { font-weight: 900; font-size: 1.05rem; }
.tier-desc { color: var(--text-dim); font-size: 0.85rem; margin-bottom: 2px; }
.tier-mastery { margin-left: auto; font-weight: 800; color: var(--green); font-size: 0.82rem; white-space: nowrap; }
.skill-path {
  position: relative;
  display: flex; flex-direction: column; align-items: center;
  padding: 10px 0 2px;
}
.skill-path::before {
  content: ""; position: absolute; top: 14px; bottom: 14px; left: 50%;
  width: 10px; transform: translateX(-50%);
  background: linear-gradient(to bottom,
    var(--green) 0%, var(--green) var(--fill, 0%),
    var(--surface3) var(--fill, 0%), var(--surface3) 100%);
  border-radius: 6px; z-index: 0;
}
.skill-row { display: flex; width: 100%; justify-content: center; position: relative; z-index: 1; flex-wrap: wrap; gap: 4px; }
.skill { display: flex; flex-direction: column; align-items: center; gap: 5px; margin: 10px 8px; cursor: pointer; min-width: 96px; transition: transform 0.12s ease; }
.skill:hover { transform: scale(1.06); }
.skill-circle {
  width: 74px; height: 74px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--panel); font-weight: 900; font-size: 1.6rem;
  border: 6px solid var(--border); box-shadow: 0 2px 6px rgba(0,0,0,0.06);
  color: var(--text-dim);
  position: relative;
}
.skill-circle:not(.done):not(.locked) { border-color: var(--tc, var(--border)); color: var(--tc, var(--text-dim)); }
.skill-circle.done { background: var(--gold); border-color: var(--gold); color: var(--on-color); box-shadow: 0 3px 0 rgba(0,0,0,0.15); }
.skill-circle.locked { background: var(--disabled); border-color: var(--border-strong); color: var(--muted); }
.skill-circle.current { animation: pulseGold 1.6s infinite; }
@keyframes pulseGold {
  0%,100% { box-shadow: 0 0 0 0 rgba(255,200,0,0.6); }
  50% { box-shadow: 0 0 0 12px rgba(255,200,0,0); }
}
.skill-label { font-size: 0.72rem; font-weight: 800; max-width: 112px; text-align: center; line-height: 1.2; }
.skill-label.locked { color: var(--text-dim); }
.skill-meta { font-size: 0.68rem; color: var(--green); font-weight: 800; }
.skill-meta.locked { color: var(--text-dim); }

/* ===== LEGEND ===== */
.legend { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin: 10px 0 18px; }
.legend-item { display: flex; align-items: center; gap: 7px; font-size: 0.78rem; font-weight: 800; color: var(--text-dim); }
.legend-swatch { width: 16px; height: 16px; border-radius: 50%; }
.placement-box.hidden { display: none; }

/* ===== LESSON MODAL (full-screen takeover) ===== */
.modal-overlay {
  position: fixed; inset: 0; z-index: 300;
  background: var(--panel);
  display: none; align-items: stretch; justify-content: stretch; padding: 0;
}
.modal-overlay.active { display: flex; }
.modal {
  background: var(--panel); border-radius: 0; max-width: none; width: 100%;
  height: 100%; max-height: none; overflow-y: auto;
  position: relative; display: flex; flex-direction: column;
}

/* lesson top bar */
.lesson-topbar { display: flex; align-items: center; gap: 14px; padding: 12px 18px; background: var(--panel); border-bottom: 2px solid var(--border); position: relative; z-index: 5; }
.lesson-close {
  background: var(--panel); border: 2px solid var(--border); color: var(--text-dim);
  width: 42px; height: 42px; border-radius: 50%; font-size: 1.25rem; font-weight: 900; line-height: 1;
  display: flex; align-items: center; justify-content: center;
}
.lesson-close:hover { border-color: var(--blue); color: var(--blue); }
.lesson-title { font-weight: 900; font-size: 0.85rem; color: var(--text-dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lesson-progress-bar { flex: 1; height: 16px; background: var(--surface2); border-radius: 20px; overflow: hidden; min-width: 80px; }
.lesson-progress-fill {
  height: 100%; width: 0%; transition: width 0.3s ease;
  background: repeating-linear-gradient(90deg, var(--green) 0 14px, var(--green-light) 14px 20px);
}
.lesson-hearts { color: var(--red); font-weight: 900; font-size: 0.9rem; white-space: nowrap; }
.lesson-skip {
  background: var(--panel); border: 2px solid var(--border); color: var(--text-dim);
  padding: 0 12px; height: 36px; border-radius: 18px; font-weight: 900; font-size: 0.75rem;
  white-space: nowrap; cursor: pointer; margin-left: auto;
}
.lesson-skip:hover { border-color: var(--orange); color: var(--orange); }
.skill-skip {
  display: inline-block; background: none; border: 1px solid var(--border); color: var(--text-dim);
  font-size: 0.55rem; font-weight: 800; padding: 0 6px; margin-top: 2px;
  border-radius: 8px; cursor: pointer; text-transform: uppercase;
}
.skill-skip:hover { border-color: var(--orange); color: var(--orange); }

.lesson-body { padding: 26px 28px 10px; flex: 1; display: flex; flex-direction: column; align-items: center; width: 100%; }

/* prompt + question */
.lesson-prompt {
  color: var(--text-dim); font-weight: 800; font-size: 0.82rem; margin-bottom: 16px;
  letter-spacing: 1.2px; text-transform: uppercase; text-align: center; width: 100%;
}
.lesson-question { font-size: 1.5rem; font-weight: 800; margin-bottom: 22px; text-align: center; line-height: 1.3; }
.lesson-question-hangul { font-size: 2.4rem; font-weight: 900; text-align: center; margin: 10px 0 6px; line-height: 1.2; }
.lesson-phonetics { text-align: center; color: var(--blue); font-weight: 800; font-size: 0.9rem; margin-bottom: 18px; }
.speaker-btn {
  background: var(--panel); border: 2px solid var(--blue); color: var(--blue);
  width: 46px; height: 46px; border-radius: 50%; font-size: 1.25rem; font-weight: 900;
  display: inline-flex; align-items: center; justify-content: center; vertical-align: middle;
}
.speaker-btn:hover { background: var(--blue-light); }
.lesson-question-row { display: flex; align-items: center; justify-content: center; gap: 10px; }

/* options (single column pills) */
.lesson-options { display: grid; grid-template-columns: 1fr; gap: 12px; width: 100%; max-width: 520px; }
.lesson-option {
  display: flex; align-items: center; gap: 12px;
  background: var(--panel); border: 3px solid var(--border); color: var(--text);
  padding: 14px 16px; border-radius: 14px; font-size: 1.02rem; font-weight: 800; text-align: left; line-height: 1.3;
}
.lesson-option:hover { border-color: var(--blue); background: var(--blue-light); }
.lesson-option .opt-key {
  width: 30px; height: 30px; border-radius: 8px; flex-shrink: 0;
  background: var(--panel); border: 2px solid var(--border); color: var(--text-dim);
  display: flex; align-items: center; justify-content: center; font-size: 0.85rem; font-weight: 900;
}
.lesson-option .opt-title { flex: 1; word-break: break-word; }
.lesson-option .opt-flag { margin-left: auto; font-weight: 900; font-size: 0.82rem; }
.lesson-option.selected { border-color: var(--blue); background: var(--blue-light); }
.lesson-option.selected .opt-key { background: var(--blue); border-color: var(--blue); color: var(--on-color); }
.lesson-option.correct { border-color: var(--green); background: var(--correct-bg); }
.lesson-option.correct .opt-key { background: var(--green); border-color: var(--green); color: var(--on-color); }
.lesson-option.correct .opt-flag { color: var(--green-dark); }
.lesson-option.wrong { border-color: var(--red); background: var(--wrong-bg); }
.lesson-option.wrong .opt-key { background: var(--red); border-color: var(--red); color: var(--on-color); }
.lesson-option.wrong .opt-flag { color: var(--red-dark); }
.lesson-option.disabled { pointer-events: none; }

/* listen badge on options */
.opt-play {
  margin-left: 8px; font-size: 0.62rem; font-weight: 800; letter-spacing: 0.06em;
  background: var(--surface); border: 2px solid var(--border); border-radius: 10px;
  padding: 4px 9px; color: var(--blue); cursor: pointer; flex-shrink: 0;
}
.opt-play:hover { background: var(--blue); color: var(--on-color); border-color: var(--blue); }
.lesson-option.selected .opt-play, .lesson-option.correct .opt-play, .lesson-option.wrong .opt-play, .lesson-option.disabled .opt-play { pointer-events: none; opacity: 0.55; }

/* input + keyboard */
.lesson-input {
  width: 100%; max-width: 520px; padding: 15px; font-size: 1.3rem; font-weight: 800;
  background: var(--panel); border: 3px solid var(--border); border-radius: 14px;
  color: var(--text); text-align: center; outline: none;
}
.lesson-input:focus { border-color: var(--blue); background: var(--blue-light); }
.lesson-input.correct { border-color: var(--green); background: var(--correct-bg); }
.lesson-input.wrong { border-color: var(--red); background: var(--wrong-bg); }

.kbd { margin: 16px auto 4px; user-select: none; }
.kbd-row { display: flex; justify-content: center; gap: 5px; margin-bottom: 6px; }
.kbd-key {
  flex: 0 0 auto; min-width: 44px; height: 46px;
  background: var(--panel); border: 2px solid var(--border); border-bottom-width: 4px;
  color: var(--text); border-radius: 10px; font-size: 1.15rem; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
}
.kbd-key:hover { background: var(--blue-light); border-color: var(--blue); color: var(--blue); }
.kbd-key.special { min-width: 58px; font-size: 0.85rem; color: var(--text-dim); }
.kbd-key.active { background: var(--blue); color: var(--on-color); border-color: var(--blue); }
.kbd-sub { text-align: center; font-size: 0.7rem; color: var(--text-dim); margin-top: 2px; font-weight: 700; }

/* sentence builder */
.builder-wordbank { display: flex; flex-wrap: wrap; gap: 9px; justify-content: center; margin: 16px 0; min-height: 46px; max-width: 520px; width: 100%; }
.builder-chip {
  padding: 10px 16px; background: var(--panel); border: 2px solid var(--border); border-bottom-width: 4px;
  border-radius: 12px; font-size: 1.02rem; font-weight: 800; color: var(--text);
}
.builder-chip:hover { border-color: var(--blue); color: var(--blue); }
.builder-chip.used { opacity: 0.30; pointer-events: none; }
.builder-chips {
  display: flex; flex-wrap: wrap; gap: 9px; justify-content: center; margin: 16px 0; min-height: 46px;
  max-width: 520px; width: 100%; border: 2px dashed var(--border); border-radius: 14px; padding: 12px;
}
.builder-answer-chip { display: flex; align-items: center; gap: 6px; background: var(--blue-light); border: 2px solid var(--blue); color: var(--blue-dark); border-bottom-width: 4px; }
.builder-remove { background: none; border: none; color: var(--red); font-size: 1rem; font-weight: 900; }

/* feedback banner */
.feedback-banner { width: 100%; max-width: 560px; border-radius: 14px; padding: 16px 18px; margin-top: 18px; }
.feedback-banner.correct { background: var(--green); }
.feedback-banner.wrong { background: var(--red); }
.feedback-banner .fb-head { font-weight: 900; font-size: 1.1rem; display: flex; align-items: center; gap: 8px; }
.feedback-banner.correct .fb-head, .feedback-banner.wrong .fb-head { color: var(--on-color); }
.feedback-banner .fb-why { margin-top: 8px; font-size: 0.9rem; line-height: 1.5; color: var(--on-color); }
.fb-answer { color: var(--on-color); font-weight: 900; text-decoration: underline; }

/* footer */
.lesson-footer { display: flex; justify-content: flex-end; align-items: center; gap: 10px; padding: 14px 24px; border-top: 2px solid var(--border); background: var(--panel); position: sticky; bottom: 0; }
.lesson-btn {
  padding: 13px 24px; border: none; border-radius: 14px; font-weight: 900; font-size: 0.95rem;
  text-transform: uppercase; letter-spacing: 0.04em;
}
.lesson-btn.check { background: var(--green); color: var(--on-color); border-bottom: 4px solid var(--green-dark); }
.lesson-btn.check:disabled { background: var(--disabled); color: var(--disabled-text); border-bottom: 4px solid var(--disabled-border); cursor: not-allowed; }
.lesson-btn.continue { background: var(--green); color: var(--on-color); border-bottom: 4px solid var(--green-dark); }
.lesson-btn.continue.wrong { background: var(--blue); border-bottom-color: var(--blue-dark); }
.lesson-btn.got-it { background: var(--blue); color: var(--on-color); border-bottom: 4px solid var(--blue-dark); }
.lesson-btn.skip { background: var(--panel); border: 2px solid var(--border); color: var(--text-dim); }
.lesson-btn.ghost { background: var(--panel); border: 2px solid var(--border); color: var(--text); }
.lesson-btn.wide { width: 100%; padding: 14px; }
.lesson-btn.row { margin-top: 10px; }
.lesson-btn.speaker, .lesson-btn.speaker:hover { background: var(--blue); color: var(--on-color); border-bottom: 4px solid var(--blue-dark); }

/* learn cards */
.learn-card { text-align: center; padding: 6px; width: 100%; max-width: 560px; }
.learn-kicker { color: var(--text-dim); font-weight: 800; font-size: 0.72rem; letter-spacing: 1.5px; text-transform: uppercase; margin-bottom: 12px; }
.learn-hangul { font-size: 2.6rem; font-weight: 900; line-height: 1.2; }
.learn-phon { color: var(--blue); font-weight: 800; margin-top: 8px; font-size: 1rem; }
.learn-en { font-size: 1.2rem; font-weight: 900; color: var(--green); margin-top: 12px; }
.learn-note { margin-top: 18px; background: var(--surface); border-radius: 12px; padding: 14px; color: var(--text); font-size: 0.9rem; line-height: 1.55; text-align: left; }
.learn-sample { margin-top: 14px; background: var(--panel); border: 2px solid var(--border); border-radius: 12px; padding: 14px; text-align: center; }
.learn-sample .ls-h { font-size: 1.4rem; font-weight: 900; }
.learn-sample .ls-p { color: var(--blue); font-size: 0.85rem; font-weight: 700; }
.learn-sample .ls-e { color: var(--text-dim); font-size: 0.85rem; font-style: italic; margin-top: 4px; }

/* completion */
.complete { text-align: center; padding: 20px 10px; width: 100%; }
.complete-icon {
  width: 90px; height: 90px; border-radius: 50%; background: var(--gold);
  border-bottom: 8px solid #e6b800; margin: 0 auto 18px;
  display: flex; align-items: center; justify-content: center; font-size: 2rem; font-weight: 900; color: var(--on-color);
}
.complete h2 { font-size: 1.7rem; font-weight: 900; margin-bottom: 10px; }
.xp-earned { font-size: 1.3rem; font-weight: 900; color: var(--blue); margin-bottom: 6px; }
.sub { color: var(--text-dim); margin-bottom: 14px; }
.lesson-stats { display: flex; gap: 34px; justify-content: center; color: var(--text-dim); font-weight: 800; margin-bottom: 18px; flex-wrap: wrap; }
.lesson-stats span b { color: var(--text); }
.stars { display: flex; justify-content: center; gap: 10px; margin-bottom: 18px; }
.star { width: 48px; height: 48px; border-radius: 50%; background: var(--surface2); border: 2px solid var(--border); }
.star.filled { background: var(--gold); border-color: var(--gold); box-shadow: 0 3px 0 rgba(0,0,0,0.15); }

/* placement */
.placement-hero { text-align: center; }
.placement-hero h2 { font-size: 1.5rem; font-weight: 900; margin-bottom: 8px; }
.placement-hero p { color: var(--text-dim); margin-bottom: 14px; }
.placement-progress { height: 10px; background: var(--surface2); border-radius: 20px; overflow: hidden; margin: 12px 0 6px; }
.placement-progress-fill { height: 100%; background: var(--blue); width: 0%; }
.placement-note { text-align: center; color: var(--text-dim); font-size: 0.85rem; margin-top: 4px; }
.placement-result { text-align: center; padding: 6px; }
.placement-result h2 { font-size: 1.5rem; font-weight: 900; margin-bottom: 8px; }
.placement-result .tier-chip { display: inline-block; padding: 6px 16px; border-radius: 20px; font-weight: 900; font-size: 0.9rem; color: var(--on-color); margin: 8px 0; }

/* ===== TOOLS / REFERENCE ===== */
.tool-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 26px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.tool-card {
  background: var(--panel); border: 2px solid var(--border); border-radius: 14px;
  padding: 16px; cursor: pointer; transition: transform 0.1s ease; text-align: left;
}
.tool-card:hover { transform: translateY(-2px); border-color: var(--blue); box-shadow: 0 4px 14px rgba(0,0,0,0.06); }
.tool-name { font-weight: 900; font-size: 1.05rem; margin: 0 0 6px; color: var(--green); }
.tool-desc { color: var(--text-dim); font-size: 0.85rem; line-height: 1.45; }
.back-btn { background: var(--panel); border: 2px solid var(--border); color: var(--text); border-radius: 12px; padding: 9px 16px; font-size: 0.78rem; font-weight: 800; letter-spacing: 0.08em; }
.back-btn:hover { border-color: var(--green); color: var(--green); }
.tool-box { background: var(--surface); border: 2px solid var(--border); border-radius: 14px; padding: 16px; margin-bottom: 14px; }
.tool-box label { font-weight: 800; font-size: 0.82rem; color: var(--text-dim); display: block; margin: 10px 0 4px; }
.tool-input { width: 100%; padding: 13px 15px; font-size: 1.1rem; font-weight: 800; background: var(--panel); border: 2px solid var(--border); border-radius: 12px; color: var(--text); outline: none; text-align: center; }
.tool-input:focus { border-color: var(--blue); background: var(--blue-light); }

.ref-row { display: flex; align-items: center; gap: 10px; width: 100%; background: var(--panel); border: 2px solid var(--border); border-radius: 12px; padding: 10px 12px; color: var(--text); cursor: pointer; text-align: left; }
.ref-row + .ref-row { margin-top: 8px; }
.ref-row:hover { border-color: var(--green); }
.ref-h { font-weight: 900; min-width: 130px; text-align: left; }
.ref-e { flex: 1; text-align: left; color: var(--text-dim); }
.ref-speak { font-size: 0.68rem; font-weight: 800; letter-spacing: 0.06em; color: var(--green); }
.ref-cat { font-weight: 900; text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.8rem; color: var(--orange); margin: 18px 0 8px; }
.gloss-search { width: 100%; padding: 14px 18px; font-size: 1.05rem; font-weight: 700; background: var(--panel); border: 2px solid var(--border); border-radius: 12px; color: var(--text); outline: none; margin-bottom: 16px; }
.gloss-search:focus { border-color: var(--blue); background: var(--blue-light); }
.ref-group { margin-bottom: 26px; }
.ref-group h3 { font-size: 1.25rem; font-weight: 900; margin-bottom: 10px; color: var(--green); }
.gloss-card { display: grid; grid-template-columns: 3fr 3fr 4fr; gap: 8px; padding: 9px 14px; background: var(--panel); border-radius: 10px; margin-bottom: 6px; font-size: 0.94rem; align-items: center; }
.gloss-card .gl-hangul { font-weight: 900; cursor: pointer; }
.gloss-card .gl-hangul:hover { color: var(--blue); }
.gloss-card .gl-phon { color: var(--blue); font-size: 0.8rem; }
.gloss-card .gl-en { color: var(--text-dim); font-weight: 700; }
.gloss-card.head { background: var(--surface2); font-weight: 900; color: var(--green); }
.gloss-note { color: var(--text-dim); font-size: 0.84rem; font-style: italic; margin-top: 4px; }

/* grammar / charts / conjugator */
.grammar-card { background: var(--panel); border: 2px solid var(--border); border-radius: 12px; padding: 16px 18px; margin-bottom: 12px; }
.grammar-card h4 { font-weight: 900; margin-bottom: 8px; color: var(--green); }
.grammar-card li, .grammar-card p { margin-left: 18px; color: var(--text); font-size: 0.94rem; line-height: 1.55; margin-bottom: 4px; }
.grammar-card .g-am { color: var(--green); font-weight: 800; }
.grammar-card .update-badge { background: var(--surface); }
.chart-row { display: flex; align-items: center; gap: 12px; padding: 8px 12px; background: var(--panel); border: 2px solid var(--border); border-radius: 10px; margin-bottom: 6px; cursor: pointer; }
.chart-row:hover { border-color: var(--blue); }
.chart-char { font-size: 1.6rem; font-weight: 900; width: 44px; text-align: center; }
.chart-bar { flex: 1; }
.chart-name { font-weight: 800; font-size: 0.9rem; }
.chart-desc { color: var(--text-dim); font-size: 0.8rem; }
.chart-sound { color: var(--blue); font-weight: 800; font-size: 0.85rem; width: 70px; text-align: right; }
.conj-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.conj-cell { background: var(--panel); border: 2px solid var(--border); border-radius: 10px; padding: 10px 12px; }
.conj-cell .cc-label { font-size: 0.72rem; font-weight: 800; color: var(--text-dim); }
.conj-cell .cc-value { font-size: 1.05rem; font-weight: 900; margin-top: 2px; }
.conj-row { display: flex; justify-content: center; }
.conj-card { background: var(--panel); border: 2px solid var(--border); border-radius: 12px; padding: 16px; }
.conj-verb { font-size: 1.6rem; font-weight: 900; margin-bottom: 6px; text-align: center; }
.conj-row-item { display: flex; align-items: center; gap: 10px; padding: 8px 4px; border-bottom: 1px solid var(--border); }
.conj-label { color: var(--text-dim); min-width: 140px; text-align: left; font-size: 0.9rem; }
.conj-form { font-weight: 800; flex: 1; text-align: left; }
.mini-speak {
  font-size: 0.65rem; font-weight: 800; letter-spacing: 0.05em; background: var(--green);
  color: var(--on-color); border: none; border-bottom: 3px solid var(--green-dark); border-radius: 8px; padding: 5px 10px; cursor: pointer;
}
.mini-speak:hover { filter: brightness(1.08); }
.update-badge { display: inline-block; background: var(--panel); border: 1px solid var(--border); border-radius: 8px; font-size: 0.8rem; font-weight: 800; padding: 6px 10px; margin: 0 4px 4px 0; cursor: pointer; }
.update-badge:hover { border-color: var(--blue); color: var(--blue); }

/* numbers */
.num-big { font-size: 3rem; font-weight: 900; color: var(--green); line-height: 1.1; }
.num-answer { font-size: 1.15rem; font-weight: 800; margin-top: 10px; }
.num-h { color: var(--green); }
.num-p { color: var(--text-dim); font-size: 0.9rem; }
.num-switch { display: flex; justify-content: center; gap: 8px; margin-top: 14px; }
.ns-btn { padding: 7px 16px; border-radius: 20px; border: 2px solid var(--border); background: var(--panel); color: var(--text-dim); font-weight: 800; cursor: pointer; }
.ns-btn.active { background: var(--green); color: var(--on-color); border-color: var(--green-dark); }

/* hangul explorer */
.jamo-grid { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; }
.jamo { min-width: 46px; height: 46px; font-size: 1.3rem; font-weight: 900; background: var(--panel); border: 2px solid var(--border); border-radius: 10px; color: var(--text); cursor: pointer; }
.jamo:hover { border-color: var(--green); color: var(--green); }

/* ===== PROFILE ===== */
.profile-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.profile-card { background: var(--panel); border: 2px solid var(--border); border-radius: 14px; padding: 18px; }
.profile-card h3 { font-size: 1.05rem; font-weight: 900; margin-bottom: 10px; color: var(--green); }
.grid-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.profile-stat { background: var(--panel); border: 2px solid var(--border); border-radius: 12px; padding: 16px; text-align: center; }
.profile-stat b { color: var(--gold); }
.ps-label { font-size: 0.72rem; font-weight: 800; letter-spacing: 0.14em; color: var(--text-dim); }
.ps-value { font-size: 1.9rem; font-weight: 900; color: var(--green); margin: 4px 0 2px; }
.ps-sub { font-size: 0.78rem; color: var(--text-dim); }
.profile-tile { background: var(--panel); border: 2px solid var(--border); border-radius: 12px; padding: 14px 16px; text-align: left; color: var(--text); cursor: pointer; display: block; width: 100%; }
.profile-tile:hover { border-color: var(--green); }
.profile-tile.danger:hover { border-color: var(--orange); }
.pt-title { font-weight: 900; font-size: 0.95rem; }
.pt-value { color: var(--text-dim); font-size: 0.82rem; margin-top: 4px; }
.bar-track { height: 9px; background: var(--surface2); border-radius: 20px; overflow: hidden; margin: 6px 0; }
.bar-fill { height: 100%; background: var(--green); border-radius: 20px; }
.word-row { display: flex; align-items: center; gap: 8px; padding: 4px 0; font-size: 0.8rem; }
.word-row .w-name { min-width: 84px; font-weight: 800; }
.word-row .w-dots { display: flex; gap: 3px; flex: 1; }
.word-row .dot { width: 14px; height: 14px; border-radius: 3px; background: var(--surface3); }
.word-row .dot.filled { background: var(--green); }
.word-row .w-level { color: var(--text-dim); font-weight: 800; margin-left: 8px; }

/* flashcards */
.flash-zone { display: flex; flex-direction: column; align-items: center; gap: 16px; padding: 10px 4px; }
.flash-card {
  width: 100%; max-width: 460px; min-height: 220px;
  background: var(--panel); border: 2px solid var(--border); border-radius: 16px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 26px; cursor: pointer; text-align: center; box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}
.flash-card .fc-h { font-size: 3rem; font-weight: 900; }
.flash-card .fc-p { color: var(--blue); font-weight: 800; margin-top: 6px; }
.flash-card .fc-e { font-size: 1.2rem; font-weight: 900; color: var(--green); margin-top: 14px; }
.flash-card .fc-n { margin-top: 16px; background: var(--surface); border-radius: 10px; padding: 12px; font-size: 0.88rem; line-height: 1.5; color: var(--text); }
.flash-rate { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.rate-btn { padding: 12px 20px; border: none; border-radius: 12px; font-weight: 900; font-size: 0.95rem; border-bottom: 4px solid rgba(0,0,0,0.18); }
.rate-btn.r1 { background: var(--red); color: var(--on-color); }
.rate-btn.r2 { background: var(--orange); color: var(--on-color); }
.rate-btn.r3 { background: var(--green); color: var(--on-color); }
.flash-empty { text-align: center; color: var(--text-dim); padding: 30px 0; }
.flash-empty h3 { color: var(--green); margin-bottom: 8px; }

/* bottom nav (mobile) */
.bottom-nav {
  display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 90;
  background: var(--panel); border-top: 2px solid var(--border);
}
.bottom-nav button {
  flex: 1; background: var(--panel); border: none; color: var(--text-dim);
  padding: 10px 0 8px; font-weight: 900; font-size: 0.75rem;
  display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.bottom-nav button.active { color: var(--green); }
.bottom-nav .bn-dot { width: 22px; height: 3px; border-radius: 3px; background: currentColor; opacity: 0.6; }
.bottom-nav button.active .bn-dot { opacity: 1; }

/* toast */
.toast {
  position: fixed; bottom: 90px; left: 50%; transform: translateX(-50%);
  background: var(--text); color: var(--on-color);
  padding: 12px 18px; border-radius: 14px; font-weight: 800;
  z-index: 400; box-shadow: 0 6px 20px var(--shadow);
}

/* ===== ANIMATIONS ===== */
@keyframes nodePop {
  0% { opacity: 0; transform: scale(0.55); }
  70% { transform: scale(1.08); }
  100% { opacity: 1; transform: scale(1); }
}
@keyframes bannerIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: none; }
}
@keyframes pageIn {
  from { opacity: 0.5; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}
@keyframes riseIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}
@keyframes bounceIn {
  0% { opacity: 0; transform: scale(0.3); }
  55% { transform: scale(1.12); }
  75% { transform: scale(0.96); }
  100% { opacity: 1; transform: scale(1); }
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}
@keyframes glowPulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(88,204,2,0.55); }
  50% { box-shadow: 0 0 0 10px rgba(88,204,2,0); }
}

.banner { animation: bannerIn 0.35s ease both; }
.placement-box { animation: riseIn 0.3s ease both 0.06s; }
.page.active { animation: pageIn 0.22s ease both; }
.skill { animation: nodePop 0.45s cubic-bezier(0.2, 0.7, 0.3, 1.2) backwards; }

.modal { animation: modalIn 0.22s ease both; }
.feedback-banner { animation: slideDown 0.25s ease both; }
.learn-card { animation: riseIn 0.3s ease both; }
.learn-sample { animation: riseIn 0.3s ease both 0.05s; }
.complete-icon { animation: bounceIn 0.5s ease both; }
.complete h2, .xp-earned, .sub, .lesson-stats { animation: riseIn 0.35s ease both; }
.stars { animation: riseIn 0.35s ease both; }
.stars .star { animation: bounceIn 0.5s ease both; }
.stars .star:nth-child(2) { animation-delay: 0.12s; }
.stars .star:nth-child(3) { animation-delay: 0.24s; }
.lesson-question, .lesson-question-hangul, .lesson-phonetics { animation: riseIn 0.28s ease both; }
.banner-cta .lesson-btn.check { animation: glowPulse 1.8s ease-in-out infinite; }

.lesson-btn { transition: transform 0.08s ease, filter 0.12s ease, box-shadow 0.08s ease; }
.lesson-btn:active:not(:disabled) { transform: translateY(2px); filter: brightness(0.94); }
.lesson-btn:not(:disabled):hover { filter: brightness(1.04); }
.skill { transition: transform 0.12s ease; }
.lesson-option, .builder-chip, .kbd-key, .jamo, .rate-btn, .ref-row, .chart-row, .gloss-card,
.tool-card, .flash-card, .profile-tile, .stat-chip, .conj-card, .conj-cell, .ns-btn {
  transition: transform 0.1s ease, border-color 0.12s ease, background 0.12s ease, color 0.12s ease, box-shadow 0.12s ease;
}
.profile-tile:active, .ref-row:active, .chart-row:active, .tool-card:active, .flash-card:active { transform: scale(0.98); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

@media (max-width: 720px) {
  .topbar { padding: 10px 14px; flex-wrap: wrap; }
  .stats { gap: 6px; }
  .nav-links { display: none; }
  .bottom-nav { display: flex; }
  .page { padding: 0 12px 80px; }
  .page-heading { margin: 18px 0 12px; }
  .lesson-options { grid-template-columns: 1fr; }
  .lesson-question { font-size: 1.35rem; }
  .lesson-question-hangul { font-size: 2.1rem; }
  .skill-circle { width: 64px; height: 64px; font-size: 1.4rem; border-width: 5px; }
  .skill { min-width: 86px; margin: 8px 4px; }
  .profile-grid { grid-template-columns: 1fr; }
  .grid-inner { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .tool-grid { grid-template-columns: 1fr; }
  .kbd-key { min-width: 34px; height: 40px; font-size: 1rem; }
  .lesson-option { font-size: 0.95rem; padding: 12px; }
  .lesson-body { padding: 20px 16px 8px; }
  .legend { display: none; }
}

.skill-circle.current { border-color: var(--gold); color: var(--gold); }
#modal-confirm .lesson-footer { justify-content: center; }

.toast { color: var(--bg); }

[data-theme="dark"] {
  --green: #58cc02;
  --green-dark: #46a302;
  --green-light: #89e219;
  --blue: #1cb0f6;
  --blue-dark: #1899d6;
  --blue-light: #123447;
  --purple: #ce82ff;
  --red: #ff4b4b;
  --red-dark: #e92626;
  --orange: #ff9600;
  --gold: #ffc800;
  --pink: #ff86d0;
  --teal: #00cd9c;
  --correct-bg: #23402d;
  --wrong-bg: #47282c;
  --bg: #121c22;
  --bg-light: #121c22;
  --surface: #1a2832;
  --surface2: #22333e;
  --surface3: #2b3f4b;
  --border: #324650;
  --border-strong: #3f5763;
  --muted: #8ba0ab;
  --panel: #182830;
  --text: #f1f5f7;
  --text-dim: #9db0ba;
  --shadow: rgba(0, 0, 0, 0.45);
  --on-color: #ffffff;
  --disabled: #2a3d48;
  --disabled-text: #6f8490;
  --disabled-border: #22333e;
  color-scheme: dark;
}
[data-theme="dark"] .stat-chip.streak { border-color: #7a4a22; }
[data-theme="dark"] .stat-chip.xp { border-color: #1d4c6b; }
[data-theme="dark"] .stat-chip.hearts { border-color: #6b2f33; }
[data-theme="dark"] .builder-answer-chip { color: var(--blue); }

/* ===== EXPANSION PAGES (landing, library, speak, reference tools) ===== */

/* landing */
.hero { text-align: center; padding: 42px 0 30px; animation: bannerIn 0.4s ease both; }
.hero-badge { display: inline-block; background: var(--green); color: var(--on-color); font-weight: 900; font-size: 0.7rem; letter-spacing: 0.18em; padding: 6px 14px; border-radius: 20px; margin-bottom: 14px; }
.hero-title { font-size: clamp(1.7rem, 5vw, 2.6rem); font-weight: 900; line-height: 1.18; color: var(--text); }
.hero-title br { display: none; }
.hero-sub { max-width: 640px; margin: 14px auto 0; color: var(--text-dim); line-height: 1.65; font-size: 1rem; }
.hero-cta { display: flex; justify-content: center; gap: 10px; margin-top: 22px; flex-wrap: wrap; }
.hero-stats { display: flex; justify-content: center; gap: 26px; flex-wrap: wrap; margin-top: 26px; }
.hs-item { text-align: center; }
.hs-big { font-size: 1.7rem; font-weight: 900; color: var(--green); }
.hs-sub { font-size: 0.72rem; font-weight: 800; letter-spacing: 0.12em; color: var(--text-dim); text-transform: uppercase; }
.hm-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 10px 0 18px; }
.hm-card { background: var(--panel); border: 2px solid var(--border); border-radius: 16px; padding: 18px; text-align: left; cursor: pointer; transition: transform 0.1s ease; }
.hm-card:hover { transform: translateY(-2px); border-color: var(--green); }
.hm-card:active { transform: scale(0.98); }
.hm-card-title { font-weight: 900; font-size: 1.05rem; color: var(--green); }
.hm-card-desc { color: var(--text-dim); font-size: 0.85rem; line-height: 1.5; margin-top: 6px; }
.hm-banner { background: var(--panel); border: 2px solid var(--border); border-radius: 16px; padding: 20px; text-align: center; margin-bottom: 14px; }
.hm-banner h2 { font-weight: 900; font-size: 1.2rem; }
.hm-meter { height: 12px; background: var(--surface2); border-radius: 20px; overflow: hidden; margin: 14px 0 4px; }
.hm-meter-fill { height: 100%; background: var(--green); border-radius: 20px; transition: width 0.4s ease; }

/* library hub */
.lib-tabs { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 6px; margin-bottom: 16px; }
.lib-tab { flex-shrink: 0; background: var(--panel); border: 2px solid var(--border); color: var(--text-dim); border-radius: 20px; padding: 8px 16px; font-weight: 800; font-size: 0.82rem; cursor: pointer; }
.lib-tab:hover { border-color: var(--blue); color: var(--blue); }
.lib-tab.active { background: var(--green); border-color: var(--green-dark); color: var(--on-color); }
.rd-tip { background: var(--surface); border: 2px solid var(--border); border-radius: 12px; padding: 12px 14px; color: var(--text-dim); font-size: 0.85rem; line-height: 1.55; margin-bottom: 14px; }
.rd-level-head { display: flex; align-items: center; gap: 10px; margin: 10px 0 10px; }
.rd-level-chip { font-weight: 900; font-size: 0.78rem; border: 2px solid var(--green); color: var(--green); border-radius: 8px; padding: 3px 9px; letter-spacing: 0.05em; }
.rd-level-head > span:last-child { color: var(--text-dim); font-size: 0.85rem; }
.rd-card { display: block; width: 100%; background: var(--panel); border: 2px solid var(--border); border-radius: 14px; padding: 14px 16px; text-align: left; cursor: pointer; margin-bottom: 8px; }
.rd-card:hover { border-color: var(--green); }
.rd-card-title { font-weight: 900; font-size: 1rem; color: var(--text); }
.rd-card-desc { color: var(--text-dim); font-size: 0.84rem; line-height: 1.5; margin-top: 4px; }
.rd-card-meta { display: flex; justify-content: space-between; align-items: center; margin-top: 8px; }
.rd-tag { color: var(--blue); font-weight: 800; font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; }
.rd-head { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 12px; }
.rd-title { font-weight: 900; font-size: 1.3rem; line-height: 1.25; }
.rd-para { margin-bottom: 18px; }
.rd-para-row { display: flex; gap: 8px; margin-bottom: 8px; }
.rd-ko { font-size: 1.15rem; line-height: 1.9; font-weight: 700; }
.rd-en { color: var(--text-dim); font-size: 0.9rem; line-height: 1.6; margin-top: 4px; }
.rd-tok { cursor: pointer; border-radius: 6px; padding: 1px 2px; transition: background 0.12s ease; }
.rd-tok:hover { background: var(--blue-light); }
.rd-vocab-head { font-weight: 900; color: var(--green); margin: 16px 0 8px; }
.rd-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }
.rd-tapinfo { display: none; background: var(--blue-light); border: 2px solid var(--blue); border-radius: 12px; padding: 12px 14px; margin-bottom: 14px; }
.rd-tapinfo.show { display: block; }
.tw-h { display: flex; align-items: center; gap: 10px; font-size: 1.5rem; font-weight: 900; }
.tw-p { color: var(--blue); font-weight: 800; margin-top: 4px; }
.tw-e { color: var(--green); font-weight: 800; margin-top: 4px; }
.tw-n { color: var(--text-dim); font-size: 0.85rem; margin-top: 6px; line-height: 1.5; }
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.chip { background: var(--panel); border: 2px solid var(--border); border-radius: 20px; padding: 6px 12px; font-size: 0.82rem; font-weight: 800; color: var(--text); cursor: pointer; }
.chip:hover { border-color: var(--green); color: var(--green); }

/* listening lab */
.ls-modes { display: flex; gap: 8px; margin-bottom: 14px; }
.ls-mode { padding: 6px 14px; font-size: 0.78rem; }
.ls-stage { margin-top: 10px; }
.ls-progress { color: var(--text-dim); font-size: 0.8rem; font-weight: 800; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 10px; }
.ls-card { background: var(--panel); border: 2px solid var(--border); border-radius: 14px; padding: 18px; text-align: center; }
.ls-question { font-size: 1.35rem; font-weight: 900; line-height: 1.6; }
.ls-hidden { margin-top: 10px; background: var(--surface); border-radius: 10px; padding: 12px; font-size: 1.1rem; font-weight: 800; }
.ls-actions { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }
.ls-input { margin-top: 14px; }
.ls-input input.text, .ls-input textarea { width: 100%; }
.ls-done { padding: 16px 0; }
.listen-select { width: 100%; margin-bottom: 10px; }
.ls-quiz-q { margin-top: 14px; font-weight: 800; font-size: 0.95rem; background: var(--panel); border: 2px solid var(--border); border-radius: 12px; padding: 12px 14px; }
.ls-quiz-opts { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.ls-opt { width: 100%; text-align: left; justify-content: flex-start; font-size: 0.92rem; }
.ls-opt:disabled { opacity: 0.55; }
.spk-wait { color: var(--blue); font-weight: 800; }
.prone-word { font-size: 2rem; }

/* media */
.media-card { display: flex; align-items: center; gap: 14px; background: var(--panel); border: 2px solid var(--border); border-radius: 14px; padding: 14px 16px; margin-bottom: 10px; }
.media-icon { width: 48px; height: 48px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; background: var(--surface); border-radius: 12px; font-weight: 900; color: var(--green); font-size: 1.1rem; }
.media-name { font-weight: 900; }
.media-kind { color: var(--blue); font-size: 0.72rem; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; margin-top: 2px; }
.media-note { color: var(--text-dim); font-size: 0.8rem; margin-top: 4px; line-height: 1.5; }
.media-video { width: 100%; max-width: 320px; border-radius: 10px; margin-top: 8px; }

/* speaking */
.spk-line { background: var(--panel); border: 2px solid var(--border); border-radius: 14px; padding: 14px 16px; margin-bottom: 10px; }
.spk-ko { font-size: 1.3rem; font-weight: 900; display: flex; align-items: center; gap: 10px; justify-content: center; }
.spk-en { color: var(--text-dim); text-align: center; font-size: 0.9rem; margin-top: 6px; }
.spk-actions { display: flex; justify-content: center; margin-top: 10px; }
.spk-fb { text-align: center; margin-top: 8px; font-size: 0.85rem; }
.pron-word { font-size: 2.1rem; }

/* chat */
.chat-box { height: 340px; overflow-y: auto; background: var(--panel); border: 2px solid var(--border); border-radius: 14px; padding: 14px; display: flex; flex-direction: column; gap: 10px; margin-bottom: 12px; }
.chat-row { display: flex; }
.chat-row.user { justify-content: flex-end; }
.chat-bubble { max-width: 82%; background: var(--surface2); border: 2px solid var(--border); border-radius: 14px; padding: 10px 12px; }
.chat-row.user .chat-bubble { background: var(--blue); border-color: var(--blue-dark); color: var(--on-color); }
.chat-ko { font-weight: 800; display: flex; align-items: center; gap: 8px; }
.chat-en { color: var(--muted); font-size: 0.8rem; margin-top: 4px; line-height: 1.45; }
.chat-row.user .chat-en { color: rgba(255, 255, 255, 0.85); }
.chat-input { display: flex; gap: 8px; }

/* writing and checkers */
.wr-area { width: 100%; resize: vertical; font-size: 1rem; line-height: 1.6; }
.wr-row { display: flex; gap: 10px; margin-top: 8px; font-size: 0.92rem; }
.wr-row b { min-width: 118px; color: var(--text-dim); }
.wr-notes { margin-top: 12px; border-top: 2px dashed var(--border); padding-top: 10px; }
.wr-note { display: flex; gap: 8px; align-items: baseline; color: var(--text); font-size: 0.9rem; margin-top: 6px; line-height: 1.5; }
.wr-fix { font-weight: 900; color: var(--green); flex-shrink: 0; }
.wr-result { white-space: pre-wrap; line-height: 1.6; }

/* compare */
.cmp-row { display: flex; align-items: center; gap: 8px; background: var(--panel); border: 2px solid var(--border); border-radius: 12px; padding: 10px 12px; margin-bottom: 8px; flex-wrap: wrap; }
.cmp-side { display: flex; align-items: center; gap: 6px; min-width: 90px; }
.cmp-nk { color: var(--green); }
.cmp-w { font-weight: 900; font-size: 1.05rem; }
.cmp-nk .cmp-w { color: var(--green); }
.cmp-sym { color: var(--text-dim); font-weight: 900; }
.cmp-note { width: 100%; color: var(--text-dim); font-size: 0.82rem; line-height: 1.5; }
.cmp-note b { color: var(--blue); }

/* frequency */
.freq-row { display: block; width: 100%; text-align: left; background: var(--panel); border: 2px solid var(--border); border-radius: 12px; padding: 12px 14px; margin-bottom: 8px; cursor: pointer; }
.freq-row:hover { border-color: var(--green); }
.freq-name { font-weight: 900; }
.freq-desc { color: var(--text-dim); font-size: 0.84rem; margin-top: 2px; }
.freq-count { color: var(--green); font-weight: 800; font-size: 0.78rem; margin-top: 6px; }

/* examples */
.ex-row { background: var(--panel); border: 2px solid var(--border); border-radius: 12px; padding: 12px 14px; margin-bottom: 8px; }
.ex-g { color: var(--blue); font-size: 0.78rem; font-weight: 800; margin-top: 6px; }

/* grammar encyclopedia */
.ge-card { display: block; width: 100%; text-align: left; background: var(--panel); border: 2px solid var(--border); border-radius: 12px; padding: 12px 14px; margin-bottom: 8px; cursor: pointer; }
.ge-card:hover { border-color: var(--green); }
.ge-card.open { cursor: default; }
.ge-card.open:hover { border-color: var(--border); }
.ge-title { font-weight: 900; }
.ge-pat { color: var(--blue); font-size: 0.85rem; font-weight: 800; margin-top: 3px; }
.ge-body { color: var(--text); line-height: 1.6; font-size: 0.92rem; margin-top: 10px; }
.ge-example { margin-top: 12px; background: var(--surface); border-radius: 10px; padding: 12px; font-size: 1rem; font-weight: 800; }

/* roadmap */
.rm-row { display: flex; align-items: center; gap: 10px; margin: 6px 0 2px; }
.rm-name { font-weight: 900; width: 40px; }
.rm-track { flex: 1; height: 12px; background: var(--surface2); border-radius: 20px; overflow: hidden; }
.rm-fill { height: 100%; background: var(--green); border-radius: 20px; }
.rm-num { color: var(--text-dim); font-weight: 800; font-size: 0.8rem; width: 62px; text-align: right; }
.rm-desc { color: var(--text-dim); font-size: 0.82rem; margin-bottom: 12px; }

/* achievements */
.ac-row { display: flex; align-items: center; gap: 12px; background: var(--panel); border: 2px solid var(--border); border-radius: 12px; padding: 10px 12px; margin-bottom: 8px; }
.ac-row.done { border-color: var(--green); }
.ac-icon { width: 34px; height: 34px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; border-radius: 10px; background: var(--surface2); font-weight: 900; color: var(--text-dim); }
.ac-row.done .ac-icon { background: var(--green); color: var(--on-color); }
.ac-name { font-weight: 900; font-size: 0.95rem; }
.ac-desc { color: var(--text-dim); font-size: 0.82rem; }

/* analytics */
.anal-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 10px; }
.anal-card { background: var(--panel); border: 2px solid var(--border); border-radius: 12px; padding: 14px; text-align: center; }
.anal-big { font-size: 1.6rem; font-weight: 900; color: var(--green); }
.anal-label { color: var(--text-dim); font-size: 0.75rem; font-weight: 800; margin-top: 4px; }
.cat-bar-row { display: flex; align-items: center; gap: 10px; margin: 6px 0; }
.cat-bar-name { width: 96px; font-weight: 800; font-size: 0.85rem; flex-shrink: 0; }
.cat-bar-track { flex: 1; height: 10px; background: var(--surface2); border-radius: 20px; overflow: hidden; }
.cat-bar-fill { height: 100%; background: var(--blue); border-radius: 20px; }
.cat-bar-num { width: 30px; text-align: right; color: var(--text-dim); font-size: 0.82rem; font-weight: 800; }

/* certificates */
.cert-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; background: var(--panel); border: 2px solid var(--border); border-radius: 12px; padding: 10px 12px; margin-bottom: 8px; flex-wrap: wrap; }
.cert-name { font-weight: 900; }

/* bookmarks and notes */
.note-row { display: flex; justify-content: space-between; gap: 10px; background: var(--panel); border: 2px solid var(--border); border-radius: 12px; padding: 10px 12px; margin-bottom: 8px; font-size: 0.9rem; }

/* strokes and handwriting */
.st-current { font-size: 3rem; font-weight: 900; text-align: center; margin: 10px 0; }
.st-row { display: flex; align-items: center; justify-content: center; gap: 12px; margin: 6px 0; }
.st-j { font-size: 1.6rem; font-weight: 900; color: var(--blue); }
.hw-line { display: flex; align-items: center; gap: 12px; justify-content: center; margin: 10px 0; flex-wrap: wrap; }
.hw-word { font-size: 3.4rem; font-weight: 900; color: var(--green); }
.hw-wrap { display: flex; justify-content: center; margin-top: 12px; }
#hw-canvas { width: 100%; max-width: 420px; height: auto; touch-action: none; background: var(--panel); border: 2px solid var(--border); border-radius: 16px; }

/* settings */
.set-label { font-weight: 800; color: var(--text-dim); display: block; margin: 6px 0 4px; }
.set-hr { border: none; border-top: 2px solid var(--border); margin: 16px 0; }

/* community */
.cm-post { background: var(--panel); border: 2px solid var(--border); border-radius: 14px; padding: 12px 14px; margin-bottom: 10px; }
.cm-head { color: var(--text-dim); font-size: 0.78rem; font-weight: 800; }
.cm-body { margin-top: 6px; line-height: 1.55; }
.cm-foot { margin-top: 8px; }

/* api and contribution */
.api-row { display: flex; gap: 10px; align-items: baseline; background: var(--panel); border: 2px solid var(--border); border-radius: 12px; padding: 10px 12px; margin-bottom: 8px; font-size: 0.88rem; }
.api-file { font-weight: 900; color: var(--green); white-space: nowrap; }

/* tool groups */
.tool-group { margin-bottom: 20px; }
.tool-group-head { font-weight: 900; letter-spacing: 0.1em; text-transform: uppercase; font-size: 0.78rem; color: var(--orange); margin: 8px 0 8px; }
.tool-box > .tool-group { margin-bottom: 4px; }

/* sample sentence */
.learn-sample { margin-top: 14px; }
.ls-h { font-size: 1.1rem; font-weight: 800; line-height: 1.8; }

/* six item bottom nav fits on small phones */
@media (max-width: 480px) {
  .bottom-nav button { font-size: 0.64rem; padding: 9px 0 7px; }
  .bottom-nav .bn-dot { width: 16px; }
  .hm-cards { grid-template-columns: 1fr; }
  .hero-title br { display: inline; }
}

/* =====================================================================
   MOBILE TUNING for the expanded pages and tools
   ===================================================================== */
body { -webkit-tap-highlight-color: transparent; }
button { touch-action: manipulation; }
.bottom-nav { padding-bottom: env(safe-area-inset-bottom, 0px); }

@media (max-width: 720px) {
  .topbar { gap: 8px; }
  .logo { font-size: 1.02rem; }
  .stat-chip { padding: 5px 9px; font-size: 0.78rem; }
  .stat-chip svg { width: 14px; height: 14px; }
  .page { padding: 0 12px calc(84px + env(safe-area-inset-bottom, 0px)); }
  .tool-box { padding: 12px; }
  .conj-card { padding: 14px; }
  .hero-stats { gap: 18px; }
  .lib-tabs { -webkit-overflow-scrolling: touch; scrollbar-width: none; }
  .lib-tabs::-webkit-scrollbar { display: none; }
  .ls-modes { flex-wrap: wrap; }
  .rd-ko { font-size: 1.08rem; }
  .spk-ko { font-size: 1.18rem; }
  .media-card { gap: 10px; }
}

@media (max-width: 480px) {
  .topbar { padding: 8px 10px; }
  .topbar .logo { font-size: 0.92rem; }
  .topbar .logo-sub { font-size: 0.5rem; }
  .topbar .stat-chip { padding: 4px 8px; font-size: 0.72rem; border-radius: 10px; }
  .topbar .stat-chip svg { width: 12px; height: 12px; }
  .bottom-nav button { font-size: 0.6rem; padding: 9px 0 7px; white-space: nowrap; word-break: keep-all; }
  .bottom-nav .bn-dot { width: 14px; }
  .page-heading h1 { font-size: 1.28rem; }
  .page-heading p { font-size: 0.86rem; }
  .hero { padding: 24px 0 18px; }
  .hero-sub { font-size: 0.92rem; }
  .hero-cta { flex-direction: column; align-items: stretch; max-width: 320px; margin-left: auto; margin-right: auto; }
  .hero-stats { gap: 14px; margin-top: 20px; }
  .hs-big { font-size: 1.35rem; }
  .hm-cards { gap: 10px; }
  .hm-card { padding: 14px; }
  .hm-banner { padding: 16px 14px; }
  .rd-title { font-size: 1.15rem; }
  .rd-ko { font-size: 1rem; line-height: 1.75; }
  .rd-en { font-size: 0.84rem; }
  .rd-actions { flex-direction: column; align-items: stretch; }
  .ls-actions { flex-direction: column; align-items: stretch; }
  .ls-question { font-size: 1.22rem; }
  .kbd-row { gap: 3px; flex-wrap: wrap; }
  .kbd-key { min-width: 30px; height: 38px; font-size: 0.9rem; }
  .kbd-key.special { min-width: 50px; font-size: 0.78rem; }
  .chat-box { height: 44vh; }
  .chat-bubble { max-width: 92%; }
  .chat-input .lesson-btn { flex-shrink: 0; }
  .prone-word, .pron-word { font-size: 1.7rem; }
  .spk-ko { font-size: 1.12rem; }
  .wr-row { flex-direction: column; gap: 3px; }
  .wr-row b { min-width: 0; font-size: 0.76rem; }
  .wr-note { font-size: 0.85rem; }
  .cmp-side { min-width: 72px; }
  .cmp-note { font-size: 0.8rem; }
  .api-row { flex-direction: column; gap: 4px; }
  .api-file { white-space: normal; }
  .cert-row, .note-row { flex-direction: column; align-items: flex-start; gap: 6px; }
  .st-current, .hw-word { font-size: 2.5rem; }
  .st-row { flex-wrap: wrap; }
  .hw-line { gap: 8px; }
  .anal-big { font-size: 1.3rem; }
  .cat-bar-name { width: 70px; font-size: 0.76rem; }
  .rm-num { width: 54px; font-size: 0.75rem; }
  .media-name { font-size: 0.92rem; }
  .ls-hidden { font-size: 1rem; }
  .tw-h { font-size: 1.3rem; }
  .ac-row { gap: 8px; }
  .lesson-topbar { padding: 10px 12px; }
  .lesson-body { padding: 20px 14px 8px; }
  .lesson-question-hangul { font-size: 2rem; }
  .banner { flex-wrap: wrap; gap: 10px; padding: 12px; }
  .banner-icon { width: 46px; height: 46px; font-size: 1rem; }
  .banner-title { font-size: 0.96rem; }
  .banner-cta { flex: 1 1 100%; margin-left: 0; }
  .banner-cta .lesson-btn { width: 100%; }
  .toast { bottom: calc(92px + env(safe-area-inset-bottom, 0px)); }
}

.topbar .stat-chip.hearts { display: flex; }

@media (max-width: 400px) {
  .topbar .stat-chip.hearts { display: none; }
  .logo { font-size: 0.88rem; }
  .hm-card-title { font-size: 0.98rem; }
  .rd-level-head { flex-wrap: wrap; }
  .hero-title { font-size: 1.5rem; }
  .lib-tab { padding: 7px 12px; font-size: 0.78rem; }
  .cmp-side { min-width: 66px; font-size: 0.9rem; }
}

/* ---- Graded reader shelves ------------------------------------------ */
.gr-shelf { margin-top: 14px; }
.gr-btns { display: flex; flex-wrap: wrap; gap: 8px; margin: 6px 0 14px; }

/* ---- Dialogue lines (role play) -------------------------------------- */
.dl-line { background: var(--panel); border: 2px solid var(--border); border-radius: 12px; padding: 14px; margin: 8px 0; }
.dl-who { font-size: 0.78rem; font-weight: 800; color: var(--blue); letter-spacing: 1px; margin-bottom: 4px; }
.dl-ko { font-size: 1.15rem; font-weight: 800; margin-bottom: 4px; }
.dl-en { color: var(--text-dim); font-size: 0.88rem; }
.dl-hint { margin-top: 6px; }

/* ---- Composition course ---------------------------------------------- */
.cp-guide { background: var(--surface); border: 2px solid var(--border); border-radius: 12px; padding: 12px 14px; margin: 8px 0; font-size: 0.9rem; line-height: 1.6; }
.cp-guide ul { margin: 6px 0 0 18px; padding: 0; }
.cp-text { width: 100%; min-height: 120px; resize: vertical; font-size: 1rem; line-height: 1.6; }

/* ---- CEFR pathway ----------------------------------------------------- */
.rm-skills { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 14px; padding: 2px 0 6px; }
.rm-skill { font-size: 0.78rem; color: var(--text-dim); }
.rm-skill .rm-track { height: 6px; }
.cd-list { list-style: none; margin: 0 0 12px; padding: 0 0 0 2px; font-size: 0.84rem; color: var(--text-dim); line-height: 1.6; }
.cd-list li::before { content: "\25B8  "; color: var(--green); }

/* ---- SM-2 spaced repetition console ------------------------------------ */
.srs-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: 8px; margin: 10px 0; }
.srs-cell { background: var(--panel); border: 2px solid var(--border); border-radius: 12px; padding: 10px 8px; text-align: center; }
.srs-num { font-size: 1.35rem; font-weight: 800; color: var(--green); }
.srs-lab { font-size: 0.72rem; color: var(--text-dim); letter-spacing: 0.5px; }
.srs-next { text-align: center; font-size: 0.8rem; color: var(--text-dim); margin: 8px 0; }
#srs-btns { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 12px; }

@media (max-width: 480px) {
  .rm-skills { grid-template-columns: 1fr 1fr; }
  .srs-grid { grid-template-columns: repeat(3, 1fr); }
  #srs-btns .lesson-btn { width: calc(50% - 4px); }
}