/* ============================================================
   Matrix Hanzi – Pro Mode v3 "Ghi nhớ tối đa"
   • Design system đồng bộ trang chủ (warm gold, Plus Jakarta Sans)
   • UX tổng kết phiên học từ chế độ Flashcard
============================================================ */

:root {
  /* Palette – đồng bộ index.html (dark là mặc định) */
  --color-bg: #17130f;
  --color-card: #292119;
  --color-soft: #342a21;
  --color-text: #f6ede0;
  --color-muted: #b8aa98;
  --color-line: rgba(214, 176, 111, 0.2);
  --color-gold: #d09a43;
  --color-gold-dark: #8d5918;
  --color-green: #27836a;
  --color-red: #a94736;
  --ok: #5bd6a0;
  --bad: #f08c8c;

  /* Elevation – đồng bộ index.html */
  --shadow-md: 0 18px 45px rgba(0, 0, 0, 0.27);
  --shadow-lg: 0 35px 100px rgba(0, 0, 0, 0.46);

  /* Typography – đồng bộ index.html */
  --font-ui: 'Plus Jakarta Sans', 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-han: 'Noto Serif SC', serif;

  /* Radius scale – đồng bộ index.html */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;

  /* Bề mặt kính của riêng Pro Mode */
  --bar-bg: rgba(15, 12, 9, 0.62);
  --card-glass: linear-gradient(180deg, rgba(41, 33, 25, 0.92), rgba(28, 22, 17, 0.95));
  --input-bg: rgba(20, 16, 12, 0.6);
  --ghost-bg: rgba(41, 33, 25, 0.42);
  --overlay-bg: rgba(10, 8, 6, 0.6);

  --top: 84px;
  --bottom: 100px;
}

body.light-mode {
  --color-bg: #f3eee3;
  --color-card: #fffdf8;
  --color-soft: #f7f0e5;
  --color-text: #282b2f;
  --color-muted: #6e6a63;
  --color-line: rgba(126, 93, 50, 0.2);
  --color-gold: #a9782c;
  --color-gold-dark: #875716;
  --color-green: #168467;
  --ok: #168467;
  --bad: #c2452e;
  --shadow-md: 0 18px 45px rgba(70, 55, 36, 0.11);
  --shadow-lg: 0 35px 100px rgba(70, 55, 36, 0.18);
  --bar-bg: rgba(247, 242, 233, 0.8);
  --card-glass: linear-gradient(180deg, rgba(255, 253, 248, 0.97), rgba(247, 240, 229, 0.95));
  --input-bg: rgba(255, 255, 255, 0.88);
  --ghost-bg: rgba(255, 253, 248, 0.5);
  --overlay-bg: rgba(43, 36, 26, 0.45);
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
}

/* Nền hào quang ấm áp – giống hệt body::before của trang chủ */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 14% 5%, rgba(189, 135, 49, 0.16), transparent 30%),
    radial-gradient(circle at 88% 18%, rgba(22, 132, 103, 0.1), transparent 26%);
}

[hidden] { display: none !important; }

button, input, select {
  font: inherit;
  color: inherit;
}

/* Focus States – đồng bộ trang chủ */
:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

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

/* ============================================
   TOPBAR: brand • tiến trình • công cụ
   (học từ fc-topbar của Flashcard)
============================================ */
.pro-topbar {
  height: var(--top);
  padding: max(12px, env(safe-area-inset-top)) 20px 10px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  grid-template-areas: "brand progress tools";
  align-items: center;
  gap: 18px;
  background: var(--bar-bg);
  border-bottom: 1px solid var(--color-line);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.pro-brand {
  grid-area: brand;
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.pro-back-btn {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--color-line);
  background: var(--color-soft);
  color: var(--color-muted);
  font-family: var(--font-ui);
  font-size: 19px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.pro-back-btn:hover, .pro-back-btn:focus-visible {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: #fff;
  outline: none;
}

.pro-title {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  min-width: 0;
}

.pro-badge {
  padding: 4px 11px;
  border: 1px solid color-mix(in srgb, var(--color-gold) 45%, transparent);
  border-radius: var(--radius-full);
  background: color-mix(in srgb, var(--color-gold) 10%, transparent);
  color: var(--color-gold);
  font-family: var(--font-ui);
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: 0.16em;
  line-height: 1.4;
  white-space: nowrap;
}

.pro-title small {
  max-width: min(300px, 30vw);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--color-muted);
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 700;
}

.pro-progress-block {
  grid-area: progress;
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
  max-width: 560px;
  width: 100%;
  justify-self: center;
}

.pro-progress-track {
  height: 6px;
  background: color-mix(in srgb, var(--color-text) 8%, transparent);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.pro-progress-fill {
  height: 100%;
  width: 0%;
  min-width: 3px;
  background: linear-gradient(90deg, var(--color-gold-dark), var(--color-gold));
  border-radius: var(--radius-full);
  transition: width 0.5s cubic-bezier(.4, 0, .2, 1);
}

.pro-progress-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 700;
  color: var(--color-muted);
  letter-spacing: 0.3px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

#sessionStat { color: var(--color-gold); }

.pro-tools {
  grid-area: tools;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Chip đếm đúng/sai – học từ fc-chip của Flashcard */
.pro-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  border-radius: var(--radius-full);
  font-family: var(--font-ui);
  font-size: 12.5px;
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  transition: transform var(--transition-fast);
}

.pro-chip.ok {
  color: var(--ok);
  border: 1.5px solid color-mix(in srgb, var(--ok) 55%, transparent);
  background: color-mix(in srgb, var(--ok) 12%, transparent);
}

.pro-chip.bad {
  color: var(--bad);
  border: 1.5px solid color-mix(in srgb, var(--bad) 55%, transparent);
  background: color-mix(in srgb, var(--bad) 12%, transparent);
}

.pro-chip.bump { animation: chipBump 0.25s cubic-bezier(.4, 0, .2, 1); }

@keyframes chipBump {
  0% { transform: scale(1); }
  50% { transform: scale(1.28); }
  100% { transform: scale(1); }
}

.pro-end-btn {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1.5px solid color-mix(in srgb, var(--bad) 55%, transparent);
  background: color-mix(in srgb, var(--bad) 10%, transparent);
  color: var(--bad);
  font-family: var(--font-ui);
  font-size: 19px;
  font-weight: 800;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), color var(--transition-fast), transform 120ms ease;
}

.pro-end-btn:hover, .pro-end-btn:focus-visible {
  background: var(--bad);
  border-color: var(--bad);
  color: #fff;
  outline: none;
}

.pro-end-btn:active { transform: scale(0.92); }

.pro-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-line);
  background: var(--color-soft);
  font-size: 17px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.pro-icon:hover {
  border-color: var(--color-gold);
  transform: translateY(-1px);
}

/* ============================================
   NÚT CHUNG
============================================ */
.pro-btn, .toggle, .mini-action {
  border: 1px solid var(--color-line);
  background: var(--color-soft);
  color: var(--color-text);
  border-radius: var(--radius-md);
  font-family: var(--font-ui);
  transition: transform var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.pro-btn:active, .toggle:active, .mini-action:active { transform: translateY(0) scale(0.98); }

.pro-btn {
  padding: 11px 18px;
  font-weight: 700;
  font-size: 0.875rem;
  cursor: pointer;
}

.pro-btn.primary {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
  box-shadow: 0 4px 12px rgba(208, 154, 67, 0.3);
}

.pro-btn.primary:hover { filter: brightness(1.08); }

/* ============================================
   SÂN KHẤU + THẺ HIỆN TẠI
============================================ */
.pro-stage {
  min-height: 0;
  display: grid;
  place-items: center;
  padding: 22px clamp(16px, 4vw, 48px);
  position: relative;
}

.focus-wrap {
  position: relative;
  width: min(980px, 100%);
  height: min(680px, calc(100dvh - var(--top) - var(--bottom) - 30px));
  min-height: 440px;
}

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

.ghost-card {
  position: absolute;
  width: min(760px, 82%);
  min-height: 70px;
  padding: 14px 22px;
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 14px;
  align-items: center;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xl);
  background: var(--ghost-bg);
  transform: translateY(var(--y)) scale(var(--scale));
  opacity: var(--opacity);
  filter: blur(var(--blur));
  transition: transform .18s, opacity .18s, filter .18s;
}

.ghost-index {
  color: var(--color-muted);
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}

.ghost-main {
  display: flex;
  gap: 14px;
  align-items: baseline;
  min-width: 0;
  overflow: hidden;
}

.ghost-hanzi {
  font-family: var(--font-han);
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 700;
  white-space: nowrap;
}

.ghost-pinyin {
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.ghost-meaning {
  color: var(--color-gold);
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 14px;
  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, 32px);
  border: 1px solid color-mix(in srgb, var(--color-gold) 40%, transparent);
  border-radius: var(--radius-2xl);
  background: var(--card-glass);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 3;
}

body:not(.light-mode) .current-card {
  box-shadow: var(--shadow-lg), 0 0 42px rgba(208, 154, 67, 0.08);
}

.current-card.ok {
  border-color: color-mix(in srgb, var(--ok) 80%, transparent);
  box-shadow: var(--shadow-lg), 0 0 46px color-mix(in srgb, var(--ok) 22%, transparent);
}

.current-card.bad {
  border-color: color-mix(in srgb, var(--bad) 80%, transparent);
  animation: cardShake .3s cubic-bezier(.36, .07, .19, .97);
}

@keyframes cardShake {
  0%, 100% { transform: translate(-50%, -50%) translateX(0) rotate(0deg); }
  20% { transform: translate(-50%, -50%) translateX(-8px) rotate(-.8deg); }
  45% { transform: translate(-50%, -50%) translateX(8px) rotate(.8deg); }
  70% { transform: translate(-50%, -50%) translateX(-5px) rotate(-.4deg); }
  88% { transform: translate(-50%, -50%) translateX(4px) rotate(.3deg); }
}

/* Chuyển động vào/ra của thẻ – học từ Flashcard */
@keyframes cardEnter {
  from { transform: translate(-50%, calc(-50% + 18px)) scale(.98); opacity: 0; }
  to { transform: translate(-50%, -50%) scale(1); opacity: 1; }
}

@keyframes cardExit {
  from { transform: translate(-50%, -50%); opacity: 1; }
  to { transform: translate(-50%, calc(-50% - 16px)) scale(.985); opacity: 0; }
}

.current-card.anim-enter { animation: cardEnter .24s cubic-bezier(0, .9, .2, 1); }
.current-card.anim-exit { animation: cardExit .15s ease forwards; }

.current-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  color: var(--color-muted);
  font-family: var(--font-ui);
  font-size: 11.5px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
}

.mini-actions { display: flex; gap: 8px; }

.mini-action {
  padding: 7px 12px;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--color-gold);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-transform: none;
  letter-spacing: 0;
}

.mini-action:disabled {
  opacity: 0.38;
  cursor: not-allowed;
  transform: none !important;
}

.current-content {
  text-align: center;
  padding: 2px 0 18px;
}

.current-hanzi {
  font-family: var(--font-han);
  font-size: clamp(58px, 8vw, 104px);
  font-weight: 700;
  line-height: 1.05;
  color: var(--color-text);
  text-rendering: optimizeLegibility;
}

body:not(.light-mode) .current-hanzi {
  text-shadow: 0 0 34px rgba(208, 154, 67, 0.18), 0 2px 10px rgba(0, 0, 0, 0.24);
}

.current-pinyin {
  margin-top: 6px;
  font-family: var(--font-body);
  font-size: clamp(13px, 1.9vw, 17px);
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--color-muted);
}

.current-meaning {
  margin-top: 10px;
  font-family: var(--font-ui);
  font-size: clamp(20px, 3.1vw, 32px);
  font-weight: 800;
  color: var(--color-gold);
  line-height: 1.35;
}

.current-card.hide-hanzi .current-hanzi,
.current-card.hide-pinyin .current-pinyin,
.current-card.no-pinyin-data .current-pinyin,
.current-card.hide-meaning .current-meaning { display: none; }

/* ============================================
   KHU VỰC TRẢ LỜI
============================================ */
.answer-area { display: grid; gap: 10px; }

.answer-row {
  display: flex;
  gap: 10px;
  align-items: stretch;
}

.answer-input {
  flex: 1;
  min-width: 0;
  height: 58px;
  border: 1px solid color-mix(in srgb, var(--color-gold) 38%, transparent);
  border-radius: var(--radius-lg);
  background: var(--input-bg);
  color: var(--color-text);
  padding: 0 18px;
  outline: none;
  font-family: var(--font-han);
  font-size: 24px;
  font-weight: 700;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.answer-input::placeholder {
  color: var(--color-muted);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  opacity: 0.8;
}

.answer-input:focus {
  border-color: var(--color-gold);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-gold) 14%, transparent);
}

.check-btn {
  flex-shrink: 0;
  min-width: 122px;
  height: 58px;
  border: 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
  color: #fff;
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.02em;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(208, 154, 67, 0.3);
  transition: filter var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.check-btn:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(208, 154, 67, 0.4);
}

.check-btn:active { transform: scale(0.97); }

.feedback {
  min-height: 20px;
  color: var(--color-muted);
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 13.5px;
  text-align: center;
}

.feedback.correct { color: var(--ok); }
.feedback.wrong { color: var(--bad); }

/* ============================================
   THANH ĐIỀU KHIỂN DƯỚI
============================================ */
.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: var(--bar-bg);
  border-top: 1px solid var(--color-line);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

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

.toggle {
  padding: 10px 16px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-muted);
  cursor: pointer;
}

.toggle:hover { color: var(--color-text); }

.toggle.active {
  color: #fff;
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(208, 154, 67, 0.3);
}

.toggle.music-on {
  background: linear-gradient(135deg, var(--color-green), color-mix(in srgb, var(--color-green) 75%, #000));
  box-shadow: 0 4px 12px color-mix(in srgb, var(--color-green) 35%, transparent);
}

.hint-line {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
  color: var(--color-muted);
  font-family: var(--font-ui);
  font-size: 11.5px;
  font-weight: 600;
  white-space: nowrap;
}

.hint-line kbd {
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 800;
  padding: 2px 7px;
  margin-right: 5px;
  border: 1px solid var(--color-line);
  border-bottom-width: 2px;
  border-radius: 6px;
  background: var(--color-soft);
  color: var(--color-text);
}

/* ============================================
   TRẠNG THÁI RỖNG
============================================ */
.pro-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  z-index: 9;
}

.pro-empty-card {
  width: min(520px, 92vw);
  padding: 34px 30px;
  border-radius: var(--radius-2xl);
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-gold);
  box-shadow: var(--shadow-md);
  text-align: center;
}

.pro-empty-icon { font-size: 46px; line-height: 1; }

.pro-empty-card h2 {
  margin: 12px 0 6px;
  font-family: var(--font-ui);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.pro-empty-card p {
  color: var(--color-muted);
  font-size: 14px;
  margin: 0 0 20px;
}

/* ============================================
   OVERLAY TRA CỨU (giữ nguyên hành vi cũ)
============================================ */
.dict-overlay {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 18px;
  background: var(--overlay-bg);
  backdrop-filter: blur(9px);
  -webkit-backdrop-filter: blur(9px);
}

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

.dict-card {
  width: min(860px, 94vw);
  height: min(720px, 88dvh);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  background: var(--color-card);
  border: 1px solid color-mix(in srgb, var(--color-gold) 35%, transparent);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  animation: cardEnterCenter .28s cubic-bezier(0, .9, .2, 1);
}

@keyframes cardEnterCenter {
  from { transform: translateY(24px) scale(.96); opacity: 0; }
  to { transform: translateY(0) scale(1); opacity: 1; }
}

.dict-header, .dict-footer {
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--color-line);
}

.dict-footer {
  border-top: 1px solid var(--color-line);
  border-bottom: 0;
  color: var(--color-muted);
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
}

.dict-footer a {
  color: var(--color-gold);
  text-decoration: none;
  font-weight: 800;
}

.dict-footer a:hover { text-decoration: underline; }

.dict-header small {
  color: var(--color-gold);
  font-family: var(--font-ui);
  font-weight: 800;
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.dict-header strong {
  display: block;
  font-family: var(--font-han);
  font-size: 26px;
  font-weight: 700;
}

.dict-frame {
  flex: 1;
  border: 0;
  background: #f5f0e6;
}

/* ============================================
   BẢNG TỔNG KẾT PHIÊN – học từ Flashcard
   + số từ mỗi phút (WPM)
============================================ */
.pro-summary-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.pro-summary-overlay.is-active { display: flex; }

.pro-summary-card {
  position: relative;
  background: var(--color-card);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-line);
  border-top: 4px solid var(--color-gold);
  padding: 34px 26px 24px;
  width: min(440px, 94vw);
  max-height: 92dvh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  text-align: center;
  animation: summaryEnter .35s cubic-bezier(0, .9, .2, 1);
}

@keyframes summaryEnter {
  from { transform: translateY(40px) scale(.94); opacity: 0; }
  to { transform: translateY(0) scale(1); opacity: 1; }
}

.pro-summary-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--color-line);
  background: var(--color-soft);
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: all var(--transition-fast);
}

.pro-summary-close:hover, .pro-summary-close:focus-visible {
  background: var(--bad);
  border-color: var(--bad);
  color: #fff;
  outline: none;
}

.pro-summary-emoji { font-size: 52px; line-height: 1; margin-bottom: 10px; }

.pro-summary-title {
  font-family: var(--font-ui);
  font-size: 25px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 4px;
  color: var(--color-text);
}

.pro-summary-sub {
  font-size: 13.5px;
  color: var(--color-muted);
  margin: 0 0 20px;
  line-height: 1.55;
}

.pro-accuracy-wrap { margin-bottom: 18px; }

.pro-accuracy-label {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-ui);
  font-size: 11.5px;
  font-weight: 700;
  color: var(--color-muted);
  margin-bottom: 6px;
}

.pro-accuracy-pct {
  color: var(--ok);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.pro-accuracy-track {
  height: 8px;
  background: color-mix(in srgb, var(--color-text) 8%, transparent);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.pro-accuracy-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-gold), var(--ok));
  border-radius: var(--radius-full);
  transition: width .6s cubic-bezier(.4, 0, .2, 1) .1s;
}

.pro-summary-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 10px;
}

.pro-stat-box {
  padding: 15px 10px 13px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-line);
  background: var(--color-soft);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
}

.pro-stat-num {
  font-family: var(--font-ui);
  font-size: 30px;
  font-weight: 800;
  line-height: 1;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}

.pro-stat-label {
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  text-align: center;
}

.pro-stat-box.gold {
  border-color: color-mix(in srgb, var(--color-gold) 55%, transparent);
  background: color-mix(in srgb, var(--color-gold) 12%, var(--color-soft));
}

.pro-stat-box.gold .pro-stat-num { color: var(--color-gold); }

/* Hộp tốc độ từ/phút – nổi bật nhất theo yêu cầu */
.pro-stat-box.wpm {
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
  border-color: transparent;
  box-shadow: 0 6px 18px rgba(208, 154, 67, 0.35);
}

.pro-stat-box.wpm .pro-stat-num,
.pro-stat-box.wpm .pro-stat-label { color: #fff; }

.pro-stat-box.bad {
  border-color: color-mix(in srgb, var(--bad) 45%, transparent);
  background: color-mix(in srgb, var(--bad) 10%, var(--color-soft));
}

.pro-stat-box.bad .pro-stat-num { color: var(--bad); }

.pro-summary-extra {
  font-size: 12px;
  color: var(--color-muted);
  margin: 0 0 18px;
  font-variant-numeric: tabular-nums;
}

.pro-summary-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pro-summary-btn {
  padding: 13px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-line);
  background: var(--color-soft);
  color: var(--color-text);
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.pro-summary-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  border-color: var(--color-gold);
}

.pro-summary-btn:active:not(:disabled) { transform: scale(0.98); }

.pro-summary-btn.primary {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
  box-shadow: 0 4px 12px rgba(208, 154, 67, 0.3);
}

.pro-summary-btn.primary:hover { filter: brightness(1.08); }

.pro-summary-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.pro-summary-hint {
  margin: 12px 0 0;
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  color: var(--color-muted);
  letter-spacing: 0.04em;
}

/* ============================================
   RESPONSIVE
============================================ */
@media (max-width: 900px) {
  .pro-title small { max-width: 24vw; }
  .pro-progress-block { max-width: none; }
}

@media (max-width: 768px) {
  :root {
    --top: 104px;
    --bottom: 92px;
  }

  .pro-topbar {
    grid-template-columns: auto minmax(0, 1fr) auto;
    grid-template-areas:
      "brand brand tools"
      "progress progress progress";
    padding: max(10px, env(safe-area-inset-top)) 12px 8px;
    gap: 8px 10px;
  }

  .pro-back-btn { width: 38px; height: 38px; font-size: 17px; }
  .pro-badge { font-size: 9.5px; padding: 3px 9px; }
  .pro-title small { max-width: 40vw; font-size: 11px; }
  .pro-icon { width: 36px; height: 36px; font-size: 15px; }
  .pro-end-btn { width: 32px; height: 32px; font-size: 17px; }
  .pro-chip { padding: 5px 8px; font-size: 11.5px; }
  .pro-progress-meta { font-size: 10px; }

  .pro-stage { padding: 10px 12px; align-items: start; }

  .focus-wrap {
    height: calc(100dvh - var(--top) - var(--bottom) - 12px);
    min-height: 380px;
  }

  .ghost-card {
    width: 92%;
    min-height: 52px;
    padding: 10px 14px;
    grid-template-columns: 56px 1fr;
    border-radius: var(--radius-lg);
  }

  .ghost-hanzi { font-size: 26px; }
  .ghost-meaning { font-size: 12.5px; }
  .ghost-pinyin { font-size: 10.5px; }

  .current-card {
    width: 96%;
    padding: 16px;
    border-radius: var(--radius-xl);
  }

  .current-meta { margin-bottom: 8px; font-size: 10.5px; }
  .mini-action { padding: 6px 9px; font-size: 11.5px; }
  .current-hanzi { font-size: clamp(48px, 16vw, 78px); }
  .current-meaning { font-size: clamp(18px, 6vw, 26px); }
  .current-content { padding-bottom: 12px; }

  .answer-input { height: 52px; font-size: 21px; padding: 0 14px; }
  .check-btn { height: 52px; min-width: 96px; font-size: 13.5px; }

  .pro-controlbar {
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: 8px;
    padding: 10px 12px max(10px, env(safe-area-inset-bottom));
  }

  .toggle-group {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    padding-bottom: 2px;
  }

  .toggle-group::-webkit-scrollbar { display: none; }
  .toggle { flex: 0 0 auto; padding: 9px 14px; font-size: 12.5px; }
  .hint-line { display: none; }

  .dict-overlay { padding: 0; }

  .dict-card {
    width: 100vw;
    height: 100dvh;
    border-radius: 0;
  }

  .pro-summary-card { padding: 30px 18px 20px; }
  .pro-stat-num { font-size: 26px; }
}

/* Màn hình thấp (điện thoại xoay ngang): bỏ chồng thẻ ma để tiết kiệm chỗ */
@media (max-height: 620px) {
  .ghost-stack { display: none; }
  .current-hanzi { font-size: clamp(40px, 9vh, 64px); }
  .current-content { padding-bottom: 8px; }
  .current-card { padding: 14px 18px; }
  .answer-input, .check-btn { height: 46px; }
}

/* Giảm chuyển động theo cài đặt hệ thống */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .current-card.anim-exit { opacity: 1; transform: translate(-50%, -50%); }
}