/* Matrix Hanzi - Pro Mode v2 */

:root {
  --bg: #091625;
  --bg2: #0e2033;
  --card: rgba(10, 22, 35, .84);
  --card2: rgba(13, 28, 44, .96);
  --line: rgba(112, 156, 199, .23);
  --line2: rgba(34, 211, 238, .55);
  --text: #f4f8ff;
  --soft: #b8c7d9;
  --muted: #71869c;
  --cyan: #22d3ee;
  --green: #34d399;
  --red: #fb7185;
  --yellow: #fbbf24;
  --shadow: 0 28px 90px rgba(0, 0, 0, .38);
  --ui: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --hanzi: 'Noto Serif SC', serif;
  --mono: 'DM Mono', monospace;
  --top: 76px;
  --bottom: 96px;
}

body.light-mode {
  --bg: #f5efe5;
  --bg2: #fffaf0;
  --card: rgba(255, 253, 247, .82);
  --card2: rgba(255, 253, 247, .97);
  --line: rgba(95, 74, 53, .16);
  --line2: rgba(0, 127, 143, .46);
  --text: #101827;
  --soft: #5f4a35;
  --muted: #8a735a;
  --cyan: #007f8f;
  --green: #059669;
  --red: #dc2626;
  --yellow: #c2410c;
  --shadow: 0 26px 70px rgba(77, 59, 36, .16);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
  overflow: hidden;
}

body {
  background: 
    radial-gradient(circle at 18% 18%, rgba(34, 211, 238, .13), transparent 28%), 
    radial-gradient(circle at 82% 26%, rgba(52, 211, 153, .12), transparent 30%), 
    linear-gradient(135deg, var(--bg), var(--bg2));
  color: var(--text);
  font-family: var(--ui);
  -webkit-font-smoothing: antialiased;
}

[hidden] {
  display: none !important;
}

button, input {
  font-family: inherit;
}

.pro-shell {
  position: relative;
  height: 100dvh;
  display: grid;
  grid-template-rows: var(--top) minmax(0, 1fr) var(--bottom);
  overflow: hidden;
  isolation: isolate;
}

.pro-bg-orb {
  position: fixed;
  width: 42vw;
  height: 42vw;
  border-radius: 999px;
  filter: blur(60px);
  opacity: .24;
  z-index: -1;
  pointer-events: none;
}

.orb-a {
  left: -15vw;
  top: 12vh;
  background: rgba(34, 211, 238, .28);
}

.orb-b {
  right: -13vw;
  bottom: 8vh;
  background: rgba(52, 211, 153, .23);
}

.pro-topbar {
  height: var(--top);
  padding: max(14px, env(safe-area-inset-top)) 22px 14px;
  display: grid;
  grid-template-columns: minmax(130px, 1fr) auto minmax(130px, 1fr);
  align-items: center;
  gap: 16px;
  background: rgba(5, 13, 23, .52);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(20px);
}

body.light-mode .pro-topbar {
  background: rgba(255, 250, 240, .68);
}

.pro-btn, .pro-icon, .toggle, .mini-action {
  border: 1px solid var(--line);
  background: rgba(13, 28, 44, .55);
  color: var(--text);
  border-radius: 14px;
  transition: transform .15s, border-color .15s, background .15s;
}

body.light-mode .pro-btn, 
body.light-mode .pro-icon, 
body.light-mode .toggle, 
body.light-mode .mini-action {
  background: rgba(255, 253, 247, .7);
}

.pro-btn:hover, .pro-icon:hover, .toggle:hover, .mini-action:hover {
  transform: translateY(-1px);
  border-color: var(--line2);
}

.pro-btn {
  padding: 11px 16px;
  font-weight: 900;
  cursor: pointer;
}

.pro-btn.primary {
  background: var(--cyan);
  color: #041017;
  border-color: transparent;
}

.pro-icon {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  cursor: pointer;
}

.pro-title {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.pro-title span {
  padding: 6px 12px;
  border: 1px solid var(--line2);
  border-radius: 999px;
  background: rgba(34, 211, 238, .08);
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .16em;
}

.pro-title small {
  max-width: min(520px, 46vw);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--soft);
  font-weight: 800;
}

.pro-stat-wrap {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.pro-stat-wrap span {
  font: 800 13px/1 var(--mono);
  color: var(--soft);
  white-space: nowrap;
}

.pro-stage {
  min-height: 0;
  display: grid;
  place-items: center;
  padding: 24px clamp(18px, 4vw, 48px);
  position: relative;
}

.focus-wrap {
  position: relative;
  width: min(980px, 100%);
  height: min(680px, calc(100dvh - var(--top) - var(--bottom) - 34px));
  min-height: 460px;
}

.ghost-stack {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
}

.ghost-card {
  position: absolute;
  width: min(760px, 82%);
  min-height: 72px;
  padding: 15px 22px;
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 16px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(11, 24, 38, .38);
  transform: translateY(var(--y)) scale(var(--scale));
  opacity: var(--opacity);
  filter: blur(var(--blur));
  transition: transform .18s, opacity .18s, filter .18s;
}

body.light-mode .ghost-card {
  background: rgba(255, 253, 247, .48);
}

.ghost-index {
  color: var(--muted);
  font: 800 12px/1 var(--mono);
}

.ghost-main {
  display: flex;
  gap: 16px;
  align-items: baseline;
  min-width: 0;
  overflow: hidden;
}

.ghost-hanzi {
  font-family: var(--hanzi);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 900;
  white-space: nowrap;
}

.ghost-meaning {
  color: var(--yellow);
  font-weight: 900;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.current-card {
  position: absolute;
  left: 50%;
  top: 50%;
  width: min(760px, 92%);
  transform: translate(-50%, -50%);
  padding: clamp(20px, 3vw, 34px);
  border: 1px solid var(--line2);
  border-radius: 30px;
  background: linear-gradient(180deg, rgba(14, 31, 48, .94), rgba(7, 18, 31, .94));
  box-shadow: var(--shadow), 0 0 42px rgba(34, 211, 238, .12);
  backdrop-filter: blur(22px);
  z-index: 3;
}

body.light-mode .current-card {
  background: linear-gradient(180deg, rgba(255, 253, 247, .98), rgba(246, 239, 229, .96));
}

.current-card.ok {
  border-color: rgba(52, 211, 153, .82);
  box-shadow: var(--shadow), 0 0 52px rgba(52, 211, 153, .22);
}

.current-card.bad {
  border-color: rgba(251, 113, 133, .82);
  animation: shake .16s ease;
}

@keyframes shake {
  0%, 100% { transform: translate(-50%, -50%) translateX(0); }
  25% { transform: translate(-50%, -50%) translateX(-7px); }
  70% { transform: translate(-50%, -50%) translateX(7px); }
}

.current-card.slide {
  animation: slide .18s ease;
}

@keyframes slide {
  from {
    transform: translate(-50%, calc(-50% + 18px));
    opacity: .86;
  }
  to {
    transform: translate(-50%, -50%);
    opacity: 1;
  }
}

.current-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
  color: var(--muted);
  font: 900 12px/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.mini-action {
  padding: 8px 12px;
  font-weight: 900;
  color: var(--cyan);
  cursor: pointer;
}

.current-content {
  text-align: center;
  padding: 4px 0 20px;
}

.current-hanzi {
  font-family: var(--hanzi);
  font-size: clamp(62px, 8vw, 110px);
  font-weight: 900;
  line-height: 1.02;
}

.current-meaning {
  margin-top: 12px;
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 900;
  color: var(--yellow);
}

.current-card.hide-hanzi .current-hanzi, 
.current-card.hide-meaning .current-meaning {
  display: none;
}

.answer-area {
  display: grid;
  gap: 11px;
}

.answer-input {
  width: 100%;
  height: 58px;
  border: 1px solid rgba(34, 211, 238, .38);
  border-radius: 18px;
  background: rgba(3, 12, 22, .68);
  color: var(--text);
  padding: 0 18px;
  outline: none;
  font: 900 24px/1 var(--hanzi);
}

body.light-mode .answer-input {
  background: rgba(255, 255, 255, .82);
  color: #101827;
}

.answer-input:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 4px rgba(34, 211, 238, .10);
}

.feedback {
  min-height: 18px;
  color: var(--muted);
  font-weight: 800;
  font-size: 13px;
  text-align: center;
}

.feedback.correct {
  color: var(--green);
}

.feedback.wrong {
  color: var(--red);
}

.pro-controlbar {
  min-height: var(--bottom);
  padding: 14px 22px max(16px, env(safe-area-inset-bottom));
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  background: rgba(5, 13, 23, .50);
  border-top: 1px solid var(--line);
  backdrop-filter: blur(20px);
}

body.light-mode .pro-controlbar {
  background: rgba(255, 250, 240, .72);
}

.toggle-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.toggle {
  padding: 10px 14px;
  font-weight: 900;
  color: var(--soft);
  cursor: pointer;
}

.toggle.active {
  color: #041017;
  background: var(--cyan);
  border-color: transparent;
}

.toggle.music-on {
  background: var(--green);
}

.hint-line {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.pro-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  z-index: 9;
}

.pro-empty-card {
  width: min(520px, 92vw);
  padding: 32px;
  border-radius: 28px;
  background: var(--card2);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  text-align: center;
}

.pro-empty-icon {
  font-size: 44px;
}

.pro-empty-card h1 {
  margin: 10px 0;
  font-size: 26px;
}

.pro-empty-card p {
  color: var(--soft);
}

.dict-overlay {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 18px;
  background: rgba(2, 8, 15, .42);
  backdrop-filter: blur(9px);
}

.dict-overlay.active {
  display: flex;
}

.dict-card {
  width: min(820px, 92vw);
  height: min(720px, 86dvh);
  border-radius: 24px;
  overflow: hidden;
  background: var(--card2);
  border: 1px solid var(--line2);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}

.dict-header, .dict-footer {
  padding: 12px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--line);
}

.dict-footer {
  border-top: 1px solid var(--line);
  border-bottom: 0;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.dict-footer a {
  color: var(--cyan);
  text-decoration: none;
  font-weight: 900;
}

.dict-header small {
  color: var(--muted);
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.dict-header strong {
  display: block;
  font-family: var(--hanzi);
  font-size: 26px;
}

.dict-frame {
  flex: 1;
  border: 0;
  background: #fff;
}

/* Responsive cho thiết bị di động */
@media (max-width: 768px) {
  :root {
    --top: 70px;
    --bottom: 132px;
  }
  
  .pro-topbar {
    grid-template-columns: auto 1fr auto;
    padding: max(10px, env(safe-area-inset-top)) 12px 10px;
    gap: 10px;
  }
  
  .pro-btn {
    padding: 10px 12px;
    font-size: 13px;
  }
  
  .pro-title span {
    font-size: 10px;
    padding: 5px 9px;
  }
  
  .pro-title small {
    max-width: 38vw;
    font-size: 11px;
  }
  
  .pro-stat-wrap span {
    font-size: 11px;
  }
  
  .pro-icon {
    width: 38px;
    height: 38px;
  }
  
  .pro-stage {
    padding: 10px 12px;
    align-items: start;
  }
  
  .focus-wrap {
    height: calc(100dvh - var(--top) - var(--bottom) - 12px);
    min-height: 390px;
  }
  
  .ghost-card {
    width: 92%;
    min-height: 54px;
    padding: 10px 14px;
    grid-template-columns: 58px 1fr;
    border-radius: 18px;
  }
  
  .ghost-hanzi {
    font-size: 28px;
  }
  
  .ghost-meaning {
    font-size: 13px;
  }
  
  .current-card {
    width: 96%;
    padding: 18px;
    border-radius: 24px;
  }
  
  .current-meta {
    margin-bottom: 10px;
  }
  
  .current-hanzi {
    font-size: clamp(54px, 18vw, 84px);
  }
  
  .current-meaning {
    font-size: clamp(20px, 7vw, 28px);
  }
  
  .answer-input {
    height: 52px;
    font-size: 22px;
  }
  
  .pro-controlbar {
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    padding: 12px 12px max(12px, env(safe-area-inset-bottom));
  }
  
  .toggle-group {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  
  .toggle {
    width: 100%;
  }
  
  .hint-line {
    justify-content: center;
    font-size: 10px;
    gap: 8px;
  }
  
  .dict-overlay {
    padding: 0;
  }
  
  .dict-card {
    width: 100vw;
    height: 100dvh;
    border-radius: 0;
  }
}

/* Hỗ trợ chế độ giảm chuyển động nếu được cài đặt trên thiết bị */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}

/* Normal Mode popup integration */
.dict-header small { color: var(--cyan); }
.dict-frame { background: #f5f0e6; }