/* ==========================================================================
   Soran Daily — 공통 CSS
   sorankorean.com 한글 학습 시스템
   ========================================================================== */

/* --- CSS Variables --- */
:root {
  --sd-bg-primary: #ffffff;
  --sd-bg-secondary: #f5f4ef;
  --sd-bg-tertiary: #ece9e0;
  --sd-bg-info: #e6f1fb;
  --sd-bg-success: #e1f5ee;
  --sd-bg-warning: #faeeda;
  --sd-bg-danger: #fcebeb;
  --sd-text-primary: #2c2c2a;
  --sd-text-secondary: #5f5e5a;
  --sd-text-tertiary: #888780;
  --sd-text-info: #185fa5;
  --sd-text-success: #0f6e56;
  --sd-text-warning: #854f0b;
  --sd-text-danger: #a32d2d;
  --sd-border-tertiary: rgba(44,44,42,0.15);
  --sd-border-secondary: rgba(44,44,42,0.3);
  --sd-border-primary: rgba(44,44,42,0.4);
  --sd-font: 'Noto Sans JP', 'Noto Sans KR', 'Hiragino Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --sd-purple: #7F77DD;
  --sd-purple-light: #AFA9EC;
  --sd-purple-bg: #EEEDFE;
  --sd-purple-dark: #534AB7;
  --sd-purple-darker: #3C3489;
  --sd-teal: #1D9E75;
  --sd-teal-dark: #0F6E56;
  --sd-teal-darker: #085041;
  --sd-blue: #185FA5;
  --sd-blue-dark: #0C447C;
  --sd-amber: #BA7517;
  --sd-amber-dark: #854F0B;
  --sd-amber-darker: #633806;
  --sd-red: #E24B4A;
}

/* --- Google Fonts (lesson.php, lesson-home.php에서 로드) --- */
/* @import은 HTML <link>로 대체 */

/* --- Inline SVG Icon Helper --- */
.sd-icon { display: inline-block; width: 1em; height: 1em; vertical-align: -0.125em; }
.sd-icon-sm { width: 14px; height: 14px; }
.sd-icon-md { width: 18px; height: 18px; }
.sd-icon-lg { width: 24px; height: 24px; }

/* --- Base / Container --- */
.sd-app {
  box-sizing: border-box;
  font-family: var(--sd-font);
  color: var(--sd-text-primary);
  background: var(--sd-bg-primary);
  max-width: 420px;
  margin: 0 auto;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
.sd-app *, .sd-app *::before, .sd-app *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* 스크롤바 숨김 */
.sd-app ::-webkit-scrollbar { display: none; }
.sd-app { scrollbar-width: none; }

/* --- Top Bar --- */
.sd-topbar {
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  border-bottom: 0.5px solid var(--sd-border-tertiary);
  font-size: 12px;
  color: var(--sd-text-secondary);
  flex-shrink: 0;
  background: var(--sd-bg-primary);
  position: sticky;
  top: 0;
  z-index: 10;
}

/* --- Screen / Step --- */
.sd-screen {
  flex: 1;
  display: none;
  flex-direction: column;
  padding: 18px 16px 22px;
}
.sd-screen.on { display: flex; }

/* --- Progress Dots --- */
.sd-dots {
  display: flex;
  gap: 5px;
  justify-content: center;
  margin-bottom: 18px;
}
.sd-dot {
  height: 6px;
  border-radius: 3px;
  background: var(--sd-border-secondary);
  transition: all .25s;
  width: 6px;
}
.sd-dot.done { background: var(--sd-teal); }
.sd-dot.now { width: 18px; background: var(--sd-purple); }

/* --- Badge --- */
.sd-badge {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 11px;
  align-self: flex-start;
}
.sd-b-green  { background: var(--sd-bg-success); color: var(--sd-teal-dark); }
.sd-b-violet { background: var(--sd-purple-bg); color: var(--sd-purple-dark); }
.sd-b-blue   { background: var(--sd-bg-info); color: var(--sd-blue); }
.sd-b-amber  { background: var(--sd-bg-warning); color: var(--sd-amber-dark); }
.sd-b-teal   { background: var(--sd-bg-success); color: var(--sd-teal-dark); }

/* --- Typography --- */
.sd-ttl {
  font-size: 17px;
  font-weight: 500;
  color: var(--sd-text-primary);
  line-height: 1.45;
  margin-bottom: 5px;
}
.sd-sub {
  font-size: 12px;
  color: var(--sd-text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
}

/* --- Card --- */
.sd-card {
  background: var(--sd-bg-secondary);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 12px;
  border: 0.5px solid var(--sd-border-tertiary);
}

/* --- Korean Big Text --- */
.sd-ko-big {
  font-size: 56px;
  font-weight: 500;
  text-align: center;
  color: var(--sd-text-primary);
  padding: 10px 0 6px;
  letter-spacing: 2px;
  font-family: 'Noto Sans KR', var(--sd-font);
  line-height: 1.1;
}
.sd-ko-play {
  cursor: pointer;
  border-radius: 16px;
  border: 2px solid var(--sd-border-secondary);
  transition: all .15s;
  -webkit-tap-highlight-color: transparent;
  padding: 16px 0;
  margin: 0 auto;
  width: 120px;
}
.sd-ko-play:hover { border-color: var(--sd-purple); background: var(--sd-purple-bg); }
.sd-ko-play:active { border-color: var(--sd-purple); background: var(--sd-purple); color: #fff; transform: scale(0.95); }

/* --- Mouth Shape --- */
.sd-mouth-inner {
  transform-origin: center;
  transform-box: fill-box;
}
.sd-mouth-inner.sd-mouth-vibrate {
  animation: sd-mouth-shake 0.6s ease-in-out;
}
@keyframes sd-mouth-shake {
  0%, 100% { transform: translate(0, 0) scale(1); }
  10% { transform: translate(-1px, 1px) scale(1.04); }
  20% { transform: translate(1px, -1px) scale(0.97); }
  30% { transform: translate(-1px, 0) scale(1.03); }
  40% { transform: translate(1px, 1px) scale(0.98); }
  50% { transform: translate(0, -1px) scale(1.02); }
  60% { transform: translate(-1px, 1px) scale(0.99); }
  70% { transform: translate(1px, 0) scale(1.01); }
  80% { transform: translate(0, -1px) scale(1); }
}
.sd-mouth-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 10px;
}
.sd-mouth-group-label {
  font-size: 12px;
  font-weight: 500;
  text-align: center;
  margin-bottom: 10px;
  color: var(--sd-purple-dark);
}
.sd-mouth-desc {
  font-size: 13px;
  color: var(--sd-text-secondary);
  text-align: center;
  line-height: 1.6;
  margin-bottom: 10px;
}

/* --- Example Words --- */
.sd-example-words {
  display: flex;
  gap: 6px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.sd-ex-word {
  font-size: 13px;
  background: var(--sd-bg-primary);
  border: 0.5px solid var(--sd-border-tertiary);
  border-radius: 8px;
  padding: 4px 10px;
  color: var(--sd-text-primary);
}

/* --- Audio Button --- */
.sd-audio-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  padding: 9px;
  border-radius: 8px;
  border: 0.5px solid var(--sd-border-secondary);
  background: var(--sd-bg-primary);
  font-size: 13px;
  color: var(--sd-text-secondary);
  cursor: pointer;
}
.sd-audio-btn:hover { background: var(--sd-bg-secondary); }

/* --- Comparison Grid --- */
.sd-cmp-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 12px;
}
.sd-cmp-box {
  text-align: center;
  background: var(--sd-bg-primary);
  border-radius: 10px;
  padding: 12px;
  border: 0.5px solid var(--sd-border-tertiary);
}
.sd-cmp-char {
  font-size: 22px;
  font-weight: 500;
  color: var(--sd-purple);
  margin-bottom: 3px;
}
.sd-cmp-play {
  display: inline-block;
  border: 1.5px solid var(--sd-border-secondary);
  border-radius: 10px;
  padding: 6px 16px;
  cursor: pointer;
  transition: all .15s;
  -webkit-tap-highlight-color: transparent;
}
.sd-cmp-play:hover { border-color: var(--sd-purple); background: var(--sd-purple-bg); }
.sd-cmp-play:active { border-color: var(--sd-purple); background: var(--sd-purple); color: #fff; transform: scale(0.95); }
.sd-cmp-desc {
  font-size: 11px;
  color: var(--sd-text-secondary);
  line-height: 1.5;
}
.sd-info-box {
  font-size: 12px;
  color: var(--sd-text-info);
  background: var(--sd-bg-info);
  border-radius: 8px;
  padding: 10px;
  line-height: 1.6;
}

/* --- Jamo Table --- */
.sd-jamo-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-bottom: 8px;
}
.sd-jamo-table th {
  font-size: 11px;
  color: var(--sd-text-secondary);
  font-weight: 400;
  padding: 4px 0;
  border-bottom: 0.5px solid var(--sd-border-tertiary);
  text-align: center;
}
.sd-jamo-table td {
  text-align: center;
  padding: 5px 2px;
  color: var(--sd-text-primary);
}
.sd-jamo-table td.hl {
  color: var(--sd-purple);
  font-weight: 500;
}
.sd-jamo-table tr:hover td { background: var(--sd-bg-secondary); }
.sd-jamo-table td.sd-play-active { background: var(--sd-purple) !important; color: #fff !important; border-radius: 4px; }

/* --- Audio Play Highlight (모든 data-play 요소) --- */
[data-play].sd-play-active {
  background: var(--sd-purple-bg) !important;
  color: var(--sd-purple-dark) !important;
  box-shadow: 0 0 0 2px var(--sd-purple-light);
  border-radius: 8px;
}
.sd-cmp-char.sd-play-active { background: var(--sd-purple) !important; color: #fff !important; border-radius: 6px; }
.sd-ex-word.sd-play-active { background: var(--sd-purple-bg) !important; border-color: var(--sd-purple) !important; }
.sd-ko-play.sd-play-active { background: var(--sd-purple-bg) !important; border-color: var(--sd-purple) !important; }

/* --- Quiz --- */
.sd-qpbar {
  height: 3px;
  background: var(--sd-border-tertiary);
  border-radius: 2px;
  margin-bottom: 14px;
  overflow: hidden;
}
.sd-qpfill {
  height: 100%;
  background: var(--sd-amber);
  border-radius: 2px;
  transition: width .3s;
}
.sd-quiz-q {
  font-size: 14px;
  font-weight: 500;
  color: var(--sd-text-primary);
  line-height: 1.6;
  margin-bottom: 14px;
  padding: 14px;
  background: var(--sd-bg-secondary);
  border-radius: 10px;
}
.sd-opts {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 10px;
}
.sd-opt {
  padding: 14px;
  border-radius: 12px;
  border: 1.5px solid var(--sd-border-tertiary);
  background: var(--sd-bg-primary);
  font-size: 20px;
  cursor: pointer;
  transition: all .15s;
  text-align: center;
  letter-spacing: 2px;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}
.sd-opt:hover { border-color: var(--sd-border-primary); background: var(--sd-bg-secondary); }
.sd-opt:active { transform: scale(0.98); }
.sd-opt.correct { border-color: var(--sd-teal); background: var(--sd-bg-success); color: var(--sd-teal-darker); }
.sd-opt.wrong { border-color: var(--sd-red); background: var(--sd-bg-danger); color: #791F1F; }
.sd-opt.show-correct { border-color: var(--sd-teal); background: var(--sd-bg-success); color: var(--sd-teal-darker); }
.sd-opt.disabled { pointer-events: none; cursor: default; }
.sd-fb {
  font-size: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 8px;
  line-height: 1.6;
  display: none;
}
.sd-fb.ok { display: block; background: var(--sd-bg-success); color: var(--sd-teal-darker); }
.sd-fb.ng { display: block; background: var(--sd-bg-danger); color: #791F1F; }

/* --- Completion --- */
.sd-done-ring {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--sd-bg-success);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 10px;
  font-size: 24px;
  color: var(--sd-teal);
}
.sd-xp {
  display: inline-flex;
  align-items: center;
  background: var(--sd-bg-warning);
  color: var(--sd-amber-darker);
  font-size: 13px;
  font-weight: 500;
  padding: 5px 14px;
  border-radius: 20px;
}

/* --- Navigation --- */
.sd-nav {
  display: flex;
  gap: 8px;
  margin-top: auto;
  padding-top: 14px;
}
.sd-btn-back {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 0.5px solid var(--sd-border-secondary);
  background: var(--sd-bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--sd-text-secondary);
  font-size: 16px;
  flex-shrink: 0;
}
.sd-btn-back:hover { background: var(--sd-bg-secondary); }
.sd-btn-next {
  flex: 1;
  height: 44px;
  border-radius: 12px;
  border: none;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s;
  color: #fff;
  -webkit-tap-highlight-color: transparent;
}
.sd-btn-next:hover { opacity: .88; }
.sd-btn-next:active { transform: scale(0.97); }
.sd-violet-btn { background: var(--sd-purple); }
.sd-green-btn { background: var(--sd-teal); }
.sd-amber-btn { background: var(--sd-amber); }
/* Full-width main button */
.sd-btn-main {
  width: 100%;
  padding: 13px;
  border-radius: 12px;
  background: var(--sd-purple);
  border: none;
  color: var(--sd-purple-bg);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
}
.sd-btn-main:hover { background: var(--sd-purple-dark); }
.sd-btn-ghost {
  width: 100%;
  padding: 10px;
  border-radius: 12px;
  background: transparent;
  border: 0.5px solid var(--sd-border-secondary);
  color: var(--sd-text-secondary);
  font-size: 13px;
  cursor: pointer;
  margin-top: 8px;
}

/* --- Onboarding --- */
.sd-social-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 12px;
  border: 0.5px solid var(--sd-border-secondary);
  border-radius: 12px;
  background: var(--sd-bg-primary);
  font-size: 14px;
  color: var(--sd-text-primary);
  cursor: pointer;
  margin-bottom: 10px;
  text-decoration: none;
}
.sd-social-btn:hover { background: var(--sd-bg-secondary); }
.sd-divider {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 6px 0 16px;
  color: var(--sd-text-tertiary);
  font-size: 12px;
}
.sd-divider::before, .sd-divider::after {
  content: '';
  flex: 1;
  height: 0.5px;
  background: var(--sd-border-tertiary);
}
.sd-input {
  width: 100%;
  padding: 10px 12px;
  border: 0.5px solid var(--sd-border-secondary);
  border-radius: 10px;
  font-size: 14px;
  color: var(--sd-text-primary);
  background: var(--sd-bg-primary);
  font-family: var(--sd-font);
}
.sd-input:focus { outline: none; border-color: var(--sd-purple); }
/* --- Streak Banner --- */
.sd-streak-banner {
  background: var(--sd-purple-bg);
  border-radius: 14px;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  transition: transform 0.2s;
}
.sd-streak-banner:hover { transform: scale(1.01); }
.sd-streak-left { display: flex; align-items: center; gap: 10px; }
.sd-streak-fire {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--sd-purple);
  display: flex;
  align-items: center;
  justify-content: center;
}
.sd-streak-num { font-size: 22px; font-weight: 500; color: var(--sd-purple-darker); line-height: 1; }
.sd-streak-label { font-size: 11px; color: var(--sd-purple-dark); margin-top: 2px; }
.sd-streak-days { display: flex; gap: 5px; }
.sd-sd { display: flex; flex-direction: column; align-items: center; gap: 3px; }
.sd-sd-circle {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 9px;
  font-weight: 500;
}
.sd-sd-circle.done { background: var(--sd-purple); color: #fff; }
.sd-sd-circle.today { background: var(--sd-purple-darker); color: #fff; }
.sd-sd-circle.empty { background: #D3D1C7; color: var(--sd-text-tertiary); }

/* --- Home: Header --- */
.sd-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.sd-greeting { font-size: 17px; font-weight: 500; color: var(--sd-text-primary); line-height: 1.4; }
.sd-greeting-sub { font-size: 12px; color: var(--sd-text-secondary); margin-top: 2px; }
.sd-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--sd-purple-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--sd-purple-dark);
  flex-shrink: 0;
  overflow: hidden;
}
.sd-avatar img { width: 100%; height: 100%; object-fit: cover; }

/* --- Home: Mascot Banner --- */
.sd-mascot-banner {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--sd-bg-primary);
  border: 1.5px solid var(--sd-purple-light);
  border-radius: 16px;
  padding: 12px 14px;
  margin-bottom: 14px;
}
.sd-mascot-icon {
  width: 48px;
  height: 48px;
  background: var(--sd-purple-bg);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.sd-mascot-icon img {
  width: 34px;
  height: 34px;
  animation: sd-bounce-soft 2s ease-in-out infinite;
}
.sd-mascot-bubble {
  flex: 1;
  background: var(--sd-purple-bg);
  border-radius: 12px;
  border-bottom-left-radius: 4px;
  padding: 8px 12px;
  position: relative;
}
.sd-mascot-msg { font-size: 13px; font-weight: 500; color: var(--sd-purple-dark); line-height: 1.5; }
.sd-mascot-name { font-size: 10px; color: var(--sd-text-tertiary); margin-top: 4px; margin-left: 2px; }

@keyframes sd-bounce-soft {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

/* --- Home: Today's Lesson Card (Hero) --- */
.sd-lesson-card {
  background: linear-gradient(135deg, var(--sd-purple), var(--sd-purple-dark));
  border: none;
  border-radius: 18px;
  padding: 20px;
  margin-bottom: 14px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(127,119,221,0.25);
  transition: transform 0.2s, box-shadow 0.2s;
}
.sd-lesson-card:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(127,119,221,0.3); }
.sd-lesson-card::before {
  content: '';
  position: absolute;
  top: -20px;
  right: -20px;
  width: 80px;
  height: 80px;
  background: rgba(255,255,255,0.12);
  border-radius: 50%;
  pointer-events: none;
}
.sd-lesson-card::after {
  content: '';
  position: absolute;
  bottom: -30px;
  left: -15px;
  width: 100px;
  height: 100px;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
  pointer-events: none;
}
.sd-lesson-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; position: relative; z-index: 1; }
.sd-lesson-badge {
  font-size: 10px;
  font-weight: 500;
  background: rgba(255,255,255,0.25);
  color: #fff;
  padding: 3px 9px;
  border-radius: 20px;
  backdrop-filter: blur(4px);
}
.sd-lesson-level { font-size: 11px; color: rgba(255,255,255,0.7); }
.sd-lesson-title { font-size: 15px; font-weight: 500; color: #fff; margin-bottom: 4px; position: relative; z-index: 1; }
.sd-lesson-desc { font-size: 12px; color: rgba(255,255,255,0.8); margin-bottom: 14px; line-height: 1.5; position: relative; z-index: 1; }
.sd-lesson-meta { display: flex; gap: 12px; margin-bottom: 14px; position: relative; z-index: 1; }
.sd-lm { display: flex; align-items: center; gap: 4px; font-size: 11px; color: rgba(255,255,255,0.75); }
.sd-lm-dot { width: 6px; height: 6px; border-radius: 50%; }
.sd-start-btn {
  width: 100%;
  height: 42px;
  border-radius: 10px;
  border: none;
  background: #fff;
  color: var(--sd-purple-dark);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s;
  position: relative;
  z-index: 1;
}
.sd-start-btn:hover { opacity: .92; transform: scale(1.01); }

/* --- Home: Level Progress --- */
.sd-section-title { font-size: 13px; font-weight: 500; color: var(--sd-text-secondary); margin-bottom: 10px; }
.sd-level-bar-wrap { background: var(--sd-bg-secondary); border-radius: 12px; padding: 14px; margin-bottom: 14px; }
.sd-level-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.sd-level-name { font-size: 13px; font-weight: 500; color: var(--sd-text-primary); }
.sd-level-num { font-size: 12px; color: var(--sd-text-secondary); }
.sd-bar-bg { height: 8px; background: var(--sd-border-tertiary); border-radius: 4px; overflow: hidden; margin-bottom: 6px; }
.sd-bar-fill { height: 100%; border-radius: 4px; background: var(--sd-purple); transition: width .6s; }
.sd-bar-labels { display: flex; justify-content: space-between; font-size: 10px; color: var(--sd-text-tertiary); }

/* --- Home: Stats --- */
.sd-stats-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 8px; margin-bottom: 14px; }
.sd-stat-card { background: var(--sd-bg-secondary); border-radius: 12px; padding: 14px 12px; text-align: center; transition: transform 0.2s; }
.sd-stat-card:hover { transform: scale(1.03); }
.sd-stat-icon { font-size: 18px; margin-bottom: 4px; }
.sd-stat-num { font-size: 20px; font-weight: 500; }
.sd-stat-lbl { font-size: 10px; margin-top: 2px; line-height: 1.4; }
.sd-stat-card.sd-stat-purple { background: var(--sd-purple-bg); }
.sd-stat-card.sd-stat-purple .sd-stat-num { color: var(--sd-purple-dark); }
.sd-stat-card.sd-stat-purple .sd-stat-lbl { color: var(--sd-purple); }
.sd-stat-card.sd-stat-amber { background: var(--sd-bg-warning); }
.sd-stat-card.sd-stat-amber .sd-stat-num { color: var(--sd-amber-dark); }
.sd-stat-card.sd-stat-amber .sd-stat-lbl { color: var(--sd-amber); }
.sd-stat-card.sd-stat-teal { background: var(--sd-bg-success); }
.sd-stat-card.sd-stat-teal .sd-stat-num { color: var(--sd-teal-dark); }
.sd-stat-card.sd-stat-teal .sd-stat-lbl { color: var(--sd-teal); }

/* --- Home: Curriculum List --- */
.sd-curriculum-list { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.sd-curr-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 0.5px solid var(--sd-border-tertiary);
  background: var(--sd-bg-primary);
  cursor: pointer;
  transition: all .2s;
  text-decoration: none;
}
.sd-curr-item:hover { background: var(--sd-bg-secondary); transform: translateY(-1px); box-shadow: 0 2px 8px rgba(0,0,0,0.06); }
.sd-curr-item.active { border-color: var(--sd-purple); background: var(--sd-purple-bg); }
.sd-curr-item.locked { opacity: .45; cursor: default; pointer-events: none; }
.sd-curr-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}
.sd-curr-icon.done { background: var(--sd-bg-success); color: var(--sd-teal); }
.sd-curr-icon.now { background: var(--sd-purple); color: #fff; font-size: 12px; font-weight: 500; }
.sd-curr-icon.locked-icon { background: var(--sd-bg-secondary); color: var(--sd-text-tertiary); }
.sd-curr-body { flex: 1; min-width: 0; }
.sd-curr-name { font-size: 13px; font-weight: 500; color: var(--sd-text-primary); }
.sd-curr-prog { font-size: 11px; color: var(--sd-text-secondary); margin-top: 1px; }
.sd-curr-badge { font-size: 9px; padding: 2px 7px; border-radius: 20px; flex-shrink: 0; }
.sd-curr-badge.done-badge { background: var(--sd-bg-success); color: var(--sd-teal-dark); }
.sd-curr-badge.active-badge { background: var(--sd-purple-bg); color: var(--sd-purple-dark); }
.sd-curr-badge.locked-badge { background: var(--sd-bg-secondary); color: var(--sd-text-tertiary); }

/* --- Home: Block / Unit Grouping --- */
.sd-block-header {
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 10px;
  margin: 14px 0 6px;
  letter-spacing: 0.5px;
}
.sd-block-header:first-child { margin-top: 0; }
.sd-unit-wrap { margin-bottom: 4px; }
.sd-unit-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--sd-bg-secondary);
  border-radius: 10px;
  cursor: pointer;
  user-select: none;
  transition: all .2s;
}
.sd-unit-header:hover { background: var(--sd-bg-tertiary); }
.sd-unit-header:active { background: var(--sd-border-tertiary); transform: scale(0.99); }
.sd-unit-info { flex: 1; min-width: 0; }
.sd-unit-label { font-size: 13px; font-weight: 600; color: var(--sd-text-primary); }
.sd-unit-sublabel { font-size: 11px; color: var(--sd-text-secondary); margin-top: 1px; }
.sd-unit-right { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }
.sd-unit-count {
  font-size: 11px;
  color: var(--sd-text-tertiary);
  background: var(--sd-bg-primary);
  padding: 2px 8px;
  border-radius: 10px;
}
.sd-unit-count.done { background: var(--sd-bg-success); color: var(--sd-teal-dark); }
.sd-unit-chevron {
  font-size: 18px;
  color: var(--sd-text-tertiary);
  transition: transform .2s;
  display: inline-block;
  width: 18px;
  text-align: center;
}
.sd-unit-open .sd-unit-chevron { transform: rotate(90deg); }
.sd-unit-body {
  display: none !important;
  padding: 6px 0 2px;
  overflow: hidden;
}
.sd-unit-open .sd-unit-body { display: block !important; }

/* --- Bottom Nav (Floating) --- */
.sd-bottom-nav {
  display: flex;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 10px 0 8px;
  position: fixed;
  bottom: 12px;
  left: 12px;
  right: 12px;
  max-width: 396px;
  margin: 0 auto;
  z-index: 10;
  border-radius: 24px;
  border: 0.5px solid var(--sd-border-tertiary);
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}
.sd-bottom-nav-spacer { height: 80px; flex-shrink: 0; }
.sd-bnav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  cursor: pointer;
  padding: 4px 0;
  text-decoration: none;
  transition: transform 0.15s;
}
.sd-bnav-item:active { transform: scale(0.92); }
.sd-bnav-icon { width: 22px; height: 22px; display: flex; align-items: center; justify-content: center; }
.sd-bnav-label { font-size: 9px; color: var(--sd-text-tertiary); }
.sd-bnav-item.active .sd-bnav-label { color: var(--sd-purple-dark); font-weight: 500; }
.sd-bnav-item.active .sd-bnav-icon { position: relative; }
.sd-bnav-item.active::after {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--sd-purple);
  display: block;
  margin-top: 1px;
}

/* --- Onboarding: Lesson Grid --- */
.sd-lesson-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.sd-lc { background: var(--sd-bg-secondary); border: 0.5px solid var(--sd-border-tertiary); border-radius: 14px; padding: 14px 12px; cursor: pointer; display: flex; flex-direction: column; gap: 4px; text-decoration: none; }
.sd-lc:hover { border-color: var(--sd-purple); background: var(--sd-purple-bg); }
.sd-lc.locked { opacity: .45; cursor: default; pointer-events: none; }
.sd-lc-badge { font-size: 10px; font-weight: 500; padding: 2px 7px; border-radius: 5px; width: fit-content; }
.sd-lc-title { font-size: 13px; font-weight: 500; color: var(--sd-text-primary); margin-top: 4px; }
.sd-lc-sub { font-size: 11px; color: var(--sd-text-secondary); }
.sd-lc-prog { height: 3px; background: var(--sd-border-tertiary); border-radius: 2px; margin-top: 8px; }
.sd-lc-prog-fill { height: 100%; border-radius: 2px; background: var(--sd-purple); }

/* --- Onboarding: Nav Row --- */
.sd-nav-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.sd-back-btn { font-size: 13px; color: var(--sd-text-secondary); cursor: pointer; padding: 4px 0; background: none; border: none; font-family: var(--sd-font); }
.sd-step-label { font-size: 12px; color: var(--sd-text-tertiary); }

/* --- Onboarding: Streak Row --- */
.sd-streak-row {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--sd-bg-secondary);
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 16px;
}
.sd-streak-icon {
  width: 28px;
  height: 28px;
  background: var(--sd-bg-warning);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}
.sd-streak-text { font-size: 12px; color: var(--sd-text-secondary); }
.sd-streak-text b { color: var(--sd-text-primary); font-weight: 500; }

/* --- Vowel Preview Group --- */
.sd-vowel-preview {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-bottom: 10px;
}
.sd-vowel-item { text-align: center; }
.sd-jamo-play-btn {
  width: 64px;
  padding: 10px 6px;
  border-radius: 12px;
  border: 1.5px solid var(--sd-border-secondary);
  background: var(--sd-bg-primary);
  cursor: pointer;
  text-align: center;
  transition: all .15s;
  font-family: var(--sd-font);
  -webkit-tap-highlight-color: transparent;
}
.sd-jamo-play-btn:hover { border-color: var(--sd-purple); background: var(--sd-purple-bg); }
.sd-jamo-play-btn:active { transform: scale(0.93); background: var(--sd-purple); color: #fff; }
.sd-jamo-play-btn:active span { color: #fff !important; }
.sd-vowel-jamo { font-size: 28px; font-weight: 500; color: var(--sd-purple); }
.sd-vowel-syl { font-size: 11px; color: var(--sd-text-secondary); }

/* --- Login CTA for non-logged-in users --- */
.sd-login-cta {
  background: var(--sd-purple-bg);
  border-radius: 12px;
  padding: 14px 16px;
  text-align: center;
  margin-bottom: 14px;
}
.sd-login-cta p {
  font-size: 13px;
  color: var(--sd-purple-dark);
  margin-bottom: 10px;
}
.sd-login-cta a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  background: var(--sd-purple);
  color: #fff;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
}

/* --- Quiz Play Button (listening quiz) --- */
.sd-quiz-play-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: none;
  background: var(--sd-purple-bg);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform .15s;
}
.sd-quiz-play-btn:hover { transform: scale(1.1); }
.sd-quiz-play-btn:active { transform: scale(0.95); }

/* --- Pronunciation Test --- */
.sd-pron-record-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 28px;
  border: 2px solid var(--sd-red);
  background: var(--sd-bg-primary);
  color: var(--sd-red);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  font-family: var(--sd-font);
  transition: all .15s;
}
.sd-pron-record-btn:hover { background: var(--sd-bg-danger); }
.sd-pron-record-btn:active { transform: scale(0.95); }

/* --- Consonant Preview Grid --- */
.sd-cons-preview {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.sd-cons-preview-item { text-align: center; }
.sd-cons-preview-char { font-size: 32px; font-weight: 500; }
.sd-cons-preview-label { font-size: 10px; color: var(--sd-text-secondary); margin-top: 2px; }
.sd-cons-purple .sd-cons-preview-char, .sd-cons-purple { color: var(--sd-purple-dark); }
.sd-cons-blue .sd-cons-preview-char, .sd-cons-blue { color: var(--sd-blue); }
.sd-cons-amber .sd-cons-preview-char, .sd-cons-amber { color: var(--sd-amber-dark); }

/* --- Consonant Derivation Row --- */
.sd-deriv-row {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}
.sd-deriv-item { display: flex; flex-direction: column; align-items: center; gap: 3px; }
.sd-deriv-char { font-size: 20px; font-weight: 500; }
.sd-deriv-arrow { font-size: 14px; color: var(--sd-text-tertiary); }
.sd-deriv-label { font-size: 10px; color: var(--sd-text-secondary); }

/* --- Topbar Buttons --- */
.sd-topbar-btn {
  background: none;
  border: none;
  font-size: 16px;
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  transition: background .15s;
}
.sd-topbar-btn:hover { background: var(--sd-bg-secondary); }

/* --- AI Chat Panel --- */
.sd-ai-panel {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) translateY(100%);
  width: 100%;
  max-width: 420px;
  height: 60vh;
  background: var(--sd-bg-primary);
  border-top: 1px solid var(--sd-border-secondary);
  border-radius: 16px 16px 0 0;
  box-shadow: 0 -4px 20px rgba(0,0,0,.1);
  display: flex;
  flex-direction: column;
  z-index: 200;
  transition: transform .3s ease;
}
.sd-ai-panel.open { transform: translateX(-50%) translateY(0); }
.sd-ai-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 0.5px solid var(--sd-border-tertiary);
  font-size: 14px;
}
.sd-ai-messages {
  flex: 1;
  overflow-y: auto;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.sd-ai-msg {
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.6;
  max-width: 85%;
  word-break: break-word;
}
.sd-ai-user {
  background: var(--sd-purple-bg);
  color: var(--sd-purple-dark);
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}
.sd-ai-bot {
  background: var(--sd-bg-secondary);
  color: var(--sd-text-primary);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}
.sd-ai-input-row {
  display: flex;
  gap: 8px;
  padding: 10px 16px;
  border-top: 0.5px solid var(--sd-border-tertiary);
}

/* --- Animations --- */
.sd-anim-pop {
  animation: sd-pop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.sd-anim-fade {
  animation: sd-fadeIn 0.6s ease-out 0.2s both;
}
.sd-anim-xp {
  animation: sd-xpBounce 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) 0.4s both;
}
@keyframes sd-pop {
  0% { transform: scale(0); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}
@keyframes sd-fadeIn {
  0% { opacity: 0; transform: translateY(8px); }
  100% { opacity: 1; transform: translateY(0); }
}
@keyframes sd-xpBounce {
  0% { transform: scale(0) rotate(-10deg); opacity: 0; }
  60% { transform: scale(1.15) rotate(3deg); }
  100% { transform: scale(1) rotate(0); opacity: 1; }
}

/* --- Confetti --- */
.sd-confetti {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 100;
  overflow: hidden;
}
.sd-confetti-dot {
  position: absolute;
  top: -10px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  animation: sd-confettiFall linear forwards;
}
@keyframes sd-confettiFall {
  0% { transform: translateY(0) rotate(0deg); opacity: 1; }
  100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}

/* --- Responsive: Wider screens --- */
@media (min-width: 480px) {
  .sd-app { border-left: 0.5px solid var(--sd-border-tertiary); border-right: 0.5px solid var(--sd-border-tertiary); }
}

/* --- 設定ページ --- */
.sd-settings-section { margin-bottom: 20px; }
.sd-settings-label { font-size: 11px; font-weight: 500; color: var(--sd-text-tertiary); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 8px; }
.sd-settings-card {
  background: var(--sd-bg-primary);
  border: 0.5px solid var(--sd-border-tertiary);
  border-radius: 14px;
  overflow: hidden;
}
.sd-settings-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 0.5px solid var(--sd-border-tertiary);
  cursor: pointer;
  transition: background .15s;
  text-decoration: none;
}
.sd-settings-row:last-child { border-bottom: none; }
.sd-settings-row:active { background: var(--sd-bg-secondary); }
.sd-settings-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
.sd-settings-info { flex: 1; min-width: 0; }
.sd-settings-title { font-size: 14px; font-weight: 500; color: var(--sd-text-primary); }
.sd-settings-desc { font-size: 11px; color: var(--sd-text-tertiary); margin-top: 1px; }
.sd-settings-value { font-size: 12px; color: var(--sd-text-secondary); flex-shrink: 0; }
.sd-settings-chevron { color: var(--sd-text-tertiary); font-size: 16px; flex-shrink: 0; }
.sd-settings-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--sd-purple-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
  overflow: hidden;
  border: 2px solid var(--sd-purple-light);
}
.sd-settings-avatar img { width: 100%; height: 100%; object-fit: cover; }
.sd-settings-name { font-size: 16px; font-weight: 500; text-align: center; color: var(--sd-text-primary); margin-bottom: 4px; }
.sd-settings-status { font-size: 12px; text-align: center; color: var(--sd-text-tertiary); }

/* --- Avatar Picker --- */
.sd-avatar-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  padding: 16px;
}
.sd-avatar-option {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 50%;
  border: 2px solid var(--sd-border-tertiary);
  overflow: hidden;
  cursor: pointer;
  transition: all .15s;
  background: var(--sd-bg-secondary);
}
.sd-avatar-option:active { transform: scale(0.9); }
.sd-avatar-option.selected { border-color: var(--sd-purple); box-shadow: 0 0 0 2px var(--sd-purple-light); }
.sd-avatar-option img { width: 100%; height: 100%; object-fit: cover; }

/* --- Settings Modal --- */
.sd-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 100;
  display: none;
  align-items: flex-end;
  justify-content: center;
}
.sd-modal-overlay.open { display: flex; }
.sd-modal-sheet {
  background: var(--sd-bg-primary);
  border-radius: 20px 20px 0 0;
  width: 100%;
  max-width: 420px;
  max-height: 70vh;
  overflow-y: auto;
  animation: sd-slideUp 0.3s ease;
}
@keyframes sd-slideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}
.sd-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  border-bottom: 0.5px solid var(--sd-border-tertiary);
  position: sticky;
  top: 0;
  background: var(--sd-bg-primary);
  z-index: 1;
}
.sd-modal-title { font-size: 15px; font-weight: 500; }
.sd-modal-close {
  background: none;
  border: none;
  font-size: 18px;
  color: var(--sd-text-tertiary);
  cursor: pointer;
  padding: 4px;
}

/* --- ゲームページ --- */
.sd-game-list { display: flex; flex-direction: column; gap: 10px; }
.sd-game-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px;
  background: var(--sd-bg-primary);
  border: 0.5px solid var(--sd-border-tertiary);
  border-radius: 14px;
  cursor: pointer;
  transition: all .2s;
}
.sd-game-card:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,0.06); }
.sd-game-card:active { transform: scale(0.98); }
.sd-game-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.sd-game-body { flex: 1; min-width: 0; }
.sd-game-title { font-size: 14px; font-weight: 600; color: var(--sd-text-primary); margin-bottom: 3px; }
.sd-game-desc { font-size: 11px; color: var(--sd-text-secondary); line-height: 1.4; margin-bottom: 6px; }
.sd-game-tags { display: flex; gap: 4px; flex-wrap: wrap; }
.sd-game-tag {
  font-size: 10px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 10px;
}
.sd-tag-purple { background: var(--sd-purple-bg); color: var(--sd-purple-dark); }
.sd-tag-blue { background: var(--sd-bg-info); color: var(--sd-blue); }
.sd-tag-pink { background: #FDE8EF; color: #C2185B; }
.sd-tag-amber { background: var(--sd-bg-warning); color: var(--sd-amber-dark); }
.sd-tag-teal { background: var(--sd-bg-success); color: var(--sd-teal-dark); }

/* --- Safe area padding for PWA --- */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
  .sd-bottom-nav { padding-bottom: calc(8px + env(safe-area-inset-bottom)); bottom: calc(12px + env(safe-area-inset-bottom)); }
}