:root {
  color-scheme: light;
  --bg: #eef1f8;
  --bg-2: #f8f9fc;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-solid: #ffffff;
  --surface-2: #f5f7fb;
  --surface-3: #eef1f7;
  --text: #172033;
  --muted: #6f7890;
  --subtle: #99a1b5;
  --border: rgba(39, 51, 81, 0.12);
  --border-strong: rgba(39, 51, 81, 0.2);
  --accent: #635bff;
  --accent-2: #17b9a6;
  --accent-3: #8b5cf6;
  --accent-soft: #eeecff;
  --known: #e8fbf4;
  --known-strong: #07845d;
  --wrong: #fff0f1;
  --wrong-strong: #d23c50;
  --warning: #f59e0b;
  --shadow-sm: 0 8px 24px rgba(38, 47, 77, 0.08);
  --shadow: 0 24px 70px rgba(37, 45, 78, 0.14);
  --shadow-strong: 0 30px 90px rgba(25, 31, 56, 0.22);
  --radius-sm: 12px;
  --radius: 20px;
  --radius-lg: 28px;
}

* { box-sizing: border-box; }
html { min-height: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 4% -5%, rgba(99, 91, 255, 0.22), transparent 30rem),
    radial-gradient(circle at 95% 12%, rgba(23, 185, 166, 0.15), transparent 28rem),
    linear-gradient(180deg, #e9edf7 0, #f8f9fc 24rem, #f3f5fa 100%);
  background-attachment: fixed;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.23;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(45, 54, 84, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 54, 84, 0.05) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(to bottom, black, transparent 75%);
}

[hidden] { display: none !important; }
button, select, input { font: inherit; }
button, .file-button, summary { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }

.app-shell {
  width: min(1480px, calc(100% - 32px));
  margin: 0 auto;
  padding: 22px 0 30px;
}

/* Hero header */
.topbar {
  position: relative;
  isolation: isolate;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 112px;
  padding: 22px 24px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.13);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 15% -35%, rgba(255,255,255,0.22), transparent 24rem),
    radial-gradient(circle at 90% 120%, rgba(23,185,166,0.35), transparent 25rem),
    linear-gradient(125deg, #171a35 0%, #29265d 48%, #49358c 100%);
  box-shadow: var(--shadow-strong);
}
.topbar::after {
  content: "";
  position: absolute;
  inset: auto -12% -115% 20%;
  z-index: -1;
  height: 220px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  transform: rotate(-8deg);
}
.brand { display: flex; align-items: center; gap: 16px; min-width: 0; }
.brand-mark {
  width: 58px;
  height: 58px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: 19px;
  background: linear-gradient(145deg, rgba(255,255,255,0.25), rgba(255,255,255,0.08));
  color: white;
  font-size: 26px;
  text-shadow: 0 4px 14px rgba(0,0,0,0.24);
  box-shadow: inset 0 1px rgba(255,255,255,0.28), 0 14px 30px rgba(0,0,0,0.24);
  backdrop-filter: blur(14px);
}
.brand h1 {
  margin: 0;
  color: #fff;
  font-size: clamp(1.55rem, 2.8vw, 2.45rem);
  letter-spacing: -0.055em;
  line-height: 1.02;
}
.brand p { margin: 7px 0 0; color: rgba(255,255,255,0.67); font-size: 0.91rem; }
.day-control {
  min-width: 188px;
  display: grid;
  gap: 7px;
  padding: 12px;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 16px;
  background: rgba(255,255,255,0.09);
  backdrop-filter: blur(14px);
}
.day-control label {
  color: rgba(255,255,255,0.68);
  font-size: 0.68rem;
  font-weight: 850;
  text-transform: uppercase;
  letter-spacing: 0.13em;
}
.day-control select {
  width: 100%;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 11px;
  padding: 10px 36px 10px 12px;
  background: rgba(255,255,255,0.95);
  color: var(--text);
  font-weight: 800;
  box-shadow: 0 8px 18px rgba(0,0,0,0.14);
}

/* KPI strip */
.summary-bar {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin: -13px 18px 16px;
}
.summary-item {
  min-width: 0;
  display: grid;
  gap: 4px;
  padding: 13px 15px;
  border: 1px solid rgba(255,255,255,0.75);
  border-radius: 15px;
  background: rgba(255,255,255,0.86);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(16px);
}
.summary-label { color: var(--muted); font-size: 0.69rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.08em; }
.summary-item strong { font-size: 1.18rem; line-height: 1; }
.summary-item.known strong { color: var(--known-strong); }
.summary-item.wrong strong { color: var(--wrong-strong); }

/* Global controls */
button, .file-button {
  position: relative;
  border: 1px solid transparent;
  border-radius: 11px;
  padding: 9px 13px;
  color: var(--text);
  background: var(--surface-solid);
  font-weight: 750;
  line-height: 1.28;
  box-shadow: 0 3px 10px rgba(37,45,78,0.04);
  transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease, background 150ms ease, color 150ms ease;
}
button:hover, .file-button:hover { transform: translateY(-2px); box-shadow: 0 9px 20px rgba(37,45,78,0.12); }
button:active, .file-button:active { transform: translateY(0) scale(0.985); }
button:focus-visible, select:focus-visible, input:focus-visible, summary:focus-visible, .word-row:focus-visible {
  outline: 3px solid rgba(99, 91, 255, 0.28);
  outline-offset: 2px;
}
button:disabled { cursor: not-allowed; opacity: 0.5; transform: none; box-shadow: none; }
button.primary {
  border-color: transparent;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  box-shadow: 0 10px 24px rgba(99,91,255,0.28);
}
button.secondary { border-color: var(--border); background: rgba(255,255,255,0.78); backdrop-filter: blur(10px); }
button.secondary.active { border-color: rgba(99,91,255,0.35); color: var(--accent); background: var(--accent-soft); }
button.danger-ghost { margin-left: auto; border-color: rgba(210,60,80,0.25); color: var(--wrong-strong); background: rgba(255,240,241,0.82); }
button.danger { color: white; background: linear-gradient(135deg, #e74f62, #c92d45); }

main { display: grid; gap: 12px; }
.mode-switch {
  width: fit-content;
  display: inline-flex;
  gap: 5px;
  padding: 5px;
  border: 1px solid rgba(255,255,255,0.8);
  border-radius: 16px;
  background: rgba(255,255,255,0.72);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(16px);
}
.mode-button { min-height: 41px; border-radius: 11px; color: var(--muted); background: transparent; box-shadow: none; }
.mode-button:hover { color: var(--text); background: rgba(99,91,255,0.06); box-shadow: none; }
.mode-button.active { color: white; background: linear-gradient(135deg, var(--accent), var(--accent-3)); box-shadow: 0 9px 22px rgba(99,91,255,0.3); }

.toolbar {
  position: relative;
  z-index: 80;
  overflow: visible;
  display: flex;
  align-items: center;
  gap: 7px;
  flex-wrap: wrap;
  padding: 10px;
  border: 1px solid rgba(255,255,255,0.78);
  border-radius: 16px;
  background: rgba(255,255,255,0.67);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(18px);
}
.toolbar > button, .more-menu summary { font-size: 0.8rem; }
.toolbar-toggle {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 11px;
  border: 1px solid var(--border);
  border-radius: 11px;
  color: var(--muted);
  background: rgba(255,255,255,0.8);
  font-size: .8rem;
  font-weight: 800;
  line-height: 1.25;
  cursor: pointer;
  user-select: none;
  transition: border-color 150ms ease, color 150ms ease, background 150ms ease, transform 150ms ease;
}
.toolbar-toggle:hover { transform: translateY(-2px); border-color: rgba(99,91,255,.34); color: var(--text); }
.toolbar-toggle.is-active { border-color: rgba(99,91,255,.36); color: var(--accent); background: var(--accent-soft); }
.toolbar-toggle input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.toggle-track {
  width: 34px;
  height: 20px;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  padding: 2px;
  border-radius: 999px;
  background: #cfd4df;
  transition: background 150ms ease;
}
.toggle-track > span {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: white;
  box-shadow: 0 2px 6px rgba(31,39,71,.24);
  transition: transform 160ms ease;
}
.toolbar-toggle input:checked + .toggle-track { background: linear-gradient(135deg, var(--accent), var(--accent-3)); }
.toolbar-toggle input:checked + .toggle-track > span { transform: translateX(14px); }
.toolbar-toggle:focus-within { outline: 3px solid rgba(99,91,255,.28); outline-offset: 2px; }
.more-menu { position: relative; z-index: 90; }
.more-menu[open] { z-index: 100; }
.more-menu summary {
  list-style: none;
  cursor: pointer;
  border: 1px solid var(--border);
  border-radius: 11px;
  padding: 9px 13px;
  font-weight: 750;
  background: rgba(255,255,255,0.8);
}
.more-menu summary::-webkit-details-marker { display: none; }
.menu-panel {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  z-index: 1000;
  min-width: 205px;
  display: grid;
  gap: 6px;
  padding: 9px;
  border: 1px solid var(--border);
  border-radius: 15px;
  background: rgba(255,255,255,0.97);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  animation: menuIn 140ms ease-out;
}
.menu-panel button, .menu-panel .file-button { width: 100%; text-align: left; border-color: transparent; box-shadow: none; }
.menu-panel button:hover, .menu-panel .file-button:hover { background: var(--surface-2); }
@keyframes menuIn { from { opacity: 0; transform: translateY(-5px) scale(.98); } to { opacity: 1; transform: none; } }

/* Sticky selected word command centre */
.active-word-panel {
  position: sticky;
  top: 9px;
  z-index: 30;
  display: grid;
  grid-template-columns: minmax(200px, 1.2fr) auto minmax(470px, 2fr) auto;
  align-items: center;
  gap: 14px;
  padding: 13px 14px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.78);
  border-radius: 19px;
  background: rgba(250,251,255,0.9);
  box-shadow: 0 16px 42px rgba(31,39,71,0.16);
  backdrop-filter: blur(22px) saturate(1.15);
}
.active-word-panel::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(to bottom, var(--accent), var(--accent-2));
}
.active-word-meta { min-width: 0; display: grid; grid-template-columns: auto 1fr; align-items: baseline; column-gap: 10px; }
.active-word-meta > span:first-child { grid-column: 1 / -1; color: var(--accent); font-size: 0.64rem; font-weight: 900; letter-spacing: 0.12em; }
.active-word-meta strong {
  max-width: 100%;
  display: block;
  overflow: hidden;
  padding: 0.06em 0 0.16em;
  color: #11182a;
  font-size: clamp(1.7rem, 2.8vw, 2.45rem);
  line-height: 1.14;
  letter-spacing: -0.035em;
  text-overflow: ellipsis;
  white-space: nowrap;
}
#rankLabel { color: var(--muted); font-size: 0.72rem; white-space: nowrap; }
.active-status { min-width: 86px; display: grid; justify-items: center; gap: 4px; }
.active-status #positionMain { color: var(--muted); font-size: 0.7rem; font-weight: 800; }
.status-pill {
  min-width: 82px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 850;
}
.status-pill.status-white { border: 1px solid var(--border); color: var(--muted); background: var(--surface-3); }
.status-pill.status-known { border: 1px solid rgba(7,132,93,0.23); color: var(--known-strong); background: var(--known); }
.status-pill.status-wrong { border: 1px solid rgba(210,60,80,0.23); color: var(--wrong-strong); background: var(--wrong); }
.active-actions { display: grid; grid-template-columns: repeat(6, minmax(88px, 1fr)); gap: 7px; }
.mark-button { min-height: 39px; padding: 8px; border-color: var(--border); background: rgba(255,255,255,0.78); box-shadow: none; }
.mark-button:hover { border-color: var(--border-strong); }
.known-button:hover { border-color: rgba(7,132,93,0.4); color: var(--known-strong); background: var(--known); }
.wrong-button:hover { border-color: rgba(210,60,80,0.4); color: var(--wrong-strong); background: var(--wrong); }
.pronounce-button:hover, .details-button:hover { border-color: rgba(99,91,255,0.4); color: var(--accent); background: var(--accent-soft); }
.active-navigation { display: grid; grid-template-columns: repeat(2, 38px); gap: 5px; }
.active-navigation button { width: 38px; height: 36px; padding: 0; border-color: var(--border); background: rgba(255,255,255,0.8); box-shadow: none; }

.layout-hint { margin: 5px 3px 0; color: var(--muted); font-size: 0.79rem; }
.groups-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); align-items: start; gap: 16px; }
.group-column {
  min-width: 0;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.83);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.83);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}
.group-column:hover { transform: translateY(-3px); box-shadow: 0 18px 42px rgba(37,45,78,0.12); }
.group-column.active-group { border-color: rgba(99,91,255,0.48); box-shadow: 0 18px 44px rgba(99,91,255,0.16); }
.group-header {
  position: relative;
  z-index: 1;
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 11px 13px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(250,251,255,0.98), rgba(245,247,252,0.93));
}
.group-header::after {
  content: "";
  position: absolute;
  left: 13px;
  right: 13px;
  bottom: -1px;
  height: 2px;
  opacity: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: opacity 180ms ease;
}
.group-column.active-group .group-header::after { opacity: 1; }
.group-column.active-group .group-header { background: linear-gradient(135deg, #f3f1ff, #effaf8); }
.group-title { display: grid; gap: 2px; }
.group-title strong { font-size: 0.95rem; line-height: 1.28; letter-spacing: -0.015em; }
.group-title span { color: var(--muted); font-size: 0.66rem; }
.group-counts { display: flex; gap: 6px; font-size: 0.65rem; font-weight: 850; }
.group-counts .known-count { color: var(--known-strong); }
.group-counts .wrong-count { color: var(--wrong-strong); }
.word-list { margin: 0; padding: 6px; list-style: none; display: grid; gap: 2px; }
.word-row {
  width: 100%;
  min-height: 38px;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 18px;
  align-items: center;
  gap: 8px;
  padding: 5px 8px 6px;
  border: 1px solid transparent;
  border-radius: 9px;
  color: var(--text);
  background: transparent;
  text-align: left;
  font-weight: 650;
  line-height: 1.32;
  box-shadow: none;
  transform: none;
  transition: background 120ms ease, border-color 120ms ease, color 120ms ease, padding-left 120ms ease;
}
.word-row:hover { transform: none; padding-left: 11px; border-color: var(--border); background: var(--surface-2); box-shadow: none; }
.word-row.status-known { color: #075c43; background: var(--known); }
.word-row.status-wrong { color: #97283b; background: var(--wrong); }
.word-row.active { border-color: rgba(99,91,255,0.72); background: #f0efff; box-shadow: inset 0 0 0 1px rgba(99,91,255,0.2); }
.word-row.active.status-known { background: linear-gradient(90deg, var(--known), #f0efff); }
.word-row.active.status-wrong { background: linear-gradient(90deg, var(--wrong), #f0efff); }
.word-number { color: var(--subtle); font: 750 0.66rem/1.3 ui-monospace, SFMono-Regular, Menlo, monospace; text-align: right; }
.word-text {
  min-width: 0;
  display: block;
  overflow: hidden;
  padding: 0.08em 0 0.2em;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.9rem;
  line-height: 1.36;
}
.word-status-dot { width: 7px; height: 7px; justify-self: center; border-radius: 50%; background: #d8ddea; box-shadow: 0 0 0 3px rgba(216,221,234,0.35); }
.status-known .word-status-dot { background: var(--known-strong); box-shadow: 0 0 0 3px rgba(7,132,93,0.12); }
.status-wrong .word-status-dot { background: var(--wrong-strong); box-shadow: 0 0 0 3px rgba(210,60,80,0.12); }

kbd {
  min-width: 21px;
  height: 21px;
  display: inline-grid;
  place-items: center;
  padding: 0 5px;
  border: 1px solid #cbd1df;
  border-bottom-width: 2px;
  border-radius: 6px;
  color: #4b5368;
  background: linear-gradient(#fff, #f3f5f9);
  font: 750 0.68rem/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}
.shortcut-guide { display: flex; flex-wrap: wrap; justify-content: center; gap: 9px 17px; padding: 16px 8px 2px; color: var(--muted); font-size: 0.76rem; }
.shortcut-guide span { display: inline-flex; align-items: center; gap: 5px; }
footer { padding-top: 14px; color: var(--muted); font-size: 0.76rem; text-align: center; }

/* Listening mode */
.hidden-word-label { color: var(--accent); font-size: clamp(1.1rem, 2vw, 1.55rem) !important; letter-spacing: 0.01em; }
.listening-mode .active-word-panel { border-color: rgba(99,91,255,0.35); background: rgba(244,242,255,0.94); }
.listening-column .group-header { background: linear-gradient(135deg, #f4f2ff, #effaf8); }
.word-row.listening-row { grid-template-columns: 30px minmax(0, 1fr) 18px; }
.listening-prompt { display: inline-flex; align-items: center; gap: 7px; color: var(--accent); font-weight: 800; }
.word-row.listening-row.active .listening-prompt { text-decoration: underline; text-underline-offset: 3px; }

/* Learning mode */
.learning-view { display: grid; gap: 13px; }
.learning-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.82);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 85% -30%, rgba(99,91,255,0.2), transparent 22rem),
    linear-gradient(135deg, rgba(255,255,255,0.95), rgba(238,236,255,0.86));
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(18px);
}
.learning-header h2 { margin: 5px 0 5px; font-size: clamp(1.55rem, 3vw, 2.5rem); letter-spacing: -0.05em; }
.learning-header p { margin: 0; color: var(--muted); }
.learning-eyebrow { color: var(--accent); font-size: 0.68rem; font-weight: 900; letter-spacing: 0.13em; text-transform: uppercase; }
.learning-group-control { min-width: 195px; display: grid; gap: 6px; }
.learning-group-control label { color: var(--muted); font-size: 0.68rem; font-weight: 850; text-transform: uppercase; letter-spacing: 0.1em; }
.learning-group-control select { border: 1px solid var(--border); border-radius: 12px; padding: 11px 36px 11px 12px; background: rgba(255,255,255,0.9); font-weight: 800; }
.learning-progress-card {
  display: grid;
  grid-template-columns: minmax(170px, .7fr) minmax(220px, 2fr) minmax(110px, .45fr);
  align-items: center;
  gap: 17px;
  padding: 14px 17px;
  border: 1px solid rgba(255,255,255,0.82);
  border-radius: 16px;
  background: rgba(255,255,255,0.82);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(16px);
}
.learning-progress-card > div:first-child { display: grid; gap: 3px; }
.learning-progress-card span { color: var(--muted); font-size: 0.73rem; }
.learning-progress-track { height: 10px; overflow: hidden; border-radius: 999px; background: #e4e7f0; }
.learning-progress-track span { display: block; width: 2.5%; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--accent), var(--accent-2)); box-shadow: 0 0 18px rgba(99,91,255,0.32); transition: width 220ms ease; }
.learning-score { display: grid; justify-items: end; gap: 2px; }
.learning-score strong { font-size: 1.08rem; }
.learning-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 5px;
  border: 1px solid rgba(255,255,255,0.8);
  border-radius: 15px;
  background: rgba(255,255,255,0.72);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(14px);
}
.learning-tab { flex: 1; min-width: 140px; border-radius: 11px; color: var(--muted); background: transparent; box-shadow: none; }
.learning-tab.active { color: white; background: linear-gradient(135deg, var(--accent), var(--accent-3)); box-shadow: 0 9px 20px rgba(99,91,255,0.25); }
.learning-panel { display: grid; gap: 12px; }
.learn-card {
  position: relative;
  min-height: 480px;
  display: grid;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.84);
  border-radius: 28px;
  background:
    radial-gradient(circle at 10% 0%, rgba(23,185,166,0.09), transparent 25rem),
    radial-gradient(circle at 95% 110%, rgba(99,91,255,0.14), transparent 28rem),
    rgba(255,255,255,0.93);
  box-shadow: var(--shadow);
}
.learn-card::after {
  content: "";
  position: absolute;
  width: 180px;
  height: 180px;
  right: -80px;
  top: -80px;
  border-radius: 50%;
  border: 34px solid rgba(99,91,255,0.06);
}
.learn-card-content { min-height: 480px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 13px; padding: clamp(30px, 5vw, 62px); text-align: center; }
.learn-card-content h3 { margin: 0; padding: .04em 0 .16em; color: #14182c; font-size: clamp(3.4rem, 9vw, 7rem); line-height: 1.06; letter-spacing: -0.06em; overflow-wrap: anywhere; }
.learn-pronounce, .quiz-audio-button { border-color: rgba(99,91,255,0.2); color: var(--accent); background: var(--accent-soft); }
.learn-audio-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 9px; }
.english-pronounce-button, .learn-pronounce.english-audio { border-color: rgba(12,160,133,0.24); color: #087d69; background: rgba(22,190,155,0.10); }
.learn-quick-meaning { margin: 7px 0 0; padding-bottom: .12em; color: var(--accent); font-size: clamp(1.8rem, 3.8vw, 3.2rem); font-weight: 900; line-height: 1.12; letter-spacing: -0.03em; }
.learn-full-meaning { max-width: 820px; margin: 0; color: var(--muted); font-size: 1rem; line-height: 1.6; }
.learn-status-row { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 7px; margin-top: 12px; }
.learn-status-row button { padding: 8px 11px; border-color: var(--border); box-shadow: none; }
.learning-card-actions { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 8px; }

/* Quiz */
.quiz-card {
  min-height: 440px;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 20px;
  padding: clamp(30px, 6vw, 70px);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.86);
  border-radius: 28px;
  background:
    radial-gradient(circle at 100% 0%, rgba(99,91,255,0.12), transparent 24rem),
    rgba(255,255,255,0.94);
  box-shadow: var(--shadow);
  text-align: center;
}
.quiz-card h3 { max-width: 870px; margin: 0; padding: .03em 0 .12em; font-size: clamp(2rem, 4.5vw, 4rem); line-height: 1.16; letter-spacing: -0.045em; }
.quiz-audio-button { min-width: 185px; padding: 12px 18px; }
.quiz-choices { width: min(880px, 100%); display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 11px; counter-reset: option; }
.quiz-choice {
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-color: var(--border);
  background: rgba(247,248,252,0.93);
  font-size: 1.02rem;
  box-shadow: none;
}
.quiz-choice:hover { border-color: rgba(99,91,255,0.48); color: var(--accent); background: var(--accent-soft); }
.quiz-choice.correct { border-color: rgba(7,132,93,0.45); color: var(--known-strong); background: var(--known); }
.quiz-choice.incorrect { border-color: rgba(210,60,80,0.45); color: var(--wrong-strong); background: var(--wrong); }
.quiz-choice:disabled { cursor: default; transform: none; opacity: 1; }
.quiz-typing { width: min(660px, 100%); display: grid; gap: 8px; text-align: left; }
.quiz-typing label { color: var(--muted); font-size: .78rem; font-weight: 850; }
.quiz-typing > div { display: grid; grid-template-columns: 1fr auto; gap: 8px; }
.quiz-typing input { min-width: 0; border: 2px solid var(--border); border-radius: 13px; padding: 13px 15px; color: var(--text); background: white; font-size: 1.05rem; }
.quiz-typing input:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 4px rgba(99,91,255,0.13); }
.quiz-feedback { min-height: 2.2em; color: var(--muted); font-weight: 800; }
.quiz-feedback.correct { color: var(--known-strong); }
.quiz-feedback.incorrect { color: var(--wrong-strong); }
.quiz-summary {
  display: grid;
  gap: 20px;
  padding: clamp(24px, 4vw, 45px);
  border: 1px solid rgba(255,255,255,0.86);
  border-radius: 28px;
  background: rgba(255,255,255,0.94);
  box-shadow: var(--shadow);
}
.quiz-summary-header { display: grid; justify-items: center; gap: 8px; text-align: center; }
.quiz-summary-header h3 { margin: 0; font-size: clamp(2.15rem, 4vw, 3.6rem); letter-spacing: -0.055em; }
.quiz-summary-score { margin: 0; color: var(--accent); font-size: clamp(1.3rem, 2.8vw, 1.95rem); font-weight: 900; }
.quiz-summary-breakdown { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; }
.quiz-summary-pill { padding: 8px 13px; border: 1px solid var(--border); border-radius: 999px; font-size: .88rem; font-weight: 900; }
.quiz-summary-pill.correct { border-color: rgba(7,132,93,.28); color: var(--known-strong); background: var(--known); }
.quiz-summary-pill.wrong { border-color: rgba(210,60,80,.28); color: var(--wrong-strong); background: var(--wrong); }
.quiz-results-list { display: grid; gap: 22px; }
.quiz-result-section { display: grid; gap: 10px; }
.quiz-result-section > h4 { margin: 0; font-size: 1.15rem; }
.quiz-result-group { display: grid; gap: 9px; }
.quiz-result-item { display: grid; gap: 9px; padding: 16px; border: 1px solid var(--border); border-left-width: 5px; border-radius: 15px; background: var(--surface-2); }
.quiz-result-item.correct { border-left-color: var(--known-strong); }
.quiz-result-item.wrong { border-left-color: var(--wrong-strong); }
.quiz-result-top { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.quiz-result-status { font-weight: 900; }
.quiz-result-item.correct .quiz-result-status { color: var(--known-strong); }
.quiz-result-item.wrong .quiz-result-status { color: var(--wrong-strong); }
.quiz-result-meta { color: var(--muted); font-size: .8rem; font-weight: 800; }
.quiz-result-item h5 { margin: 0; font-size: 1.03rem; line-height: 1.35; }
.quiz-result-answers { display: grid; grid-template-columns: max-content minmax(0,1fr); gap: 4px 12px; margin: 0; }
.quiz-result-answers dt { color: var(--muted); font-size: .8rem; font-weight: 850; }
.quiz-result-answers dd { min-width: 0; margin: 0; overflow-wrap: anywhere; font-weight: 750; }
.quiz-summary-actions { position: sticky; bottom: 10px; padding: 10px; border: 1px solid rgba(255,255,255,0.8); border-radius: 15px; background: rgba(255,255,255,0.9); box-shadow: var(--shadow-sm); backdrop-filter: blur(16px); }

/* Matching */
.match-instructions { display: flex; align-items: end; justify-content: space-between; gap: 20px; padding: 10px 3px; }
.match-instructions h3 { margin: 4px 0 0; font-size: clamp(1.4rem, 2.7vw, 2.2rem); letter-spacing: -0.04em; }
.match-board { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 18px; }
.match-column { display: grid; gap: 10px; }
.match-tile { min-height: 64px; border-color: var(--border); background: rgba(255,255,255,0.88); font-size: 1rem; text-align: center; box-shadow: var(--shadow-sm); }
.match-tile.selected { border-color: rgba(99,91,255,0.5); color: var(--accent); background: var(--accent-soft); box-shadow: 0 0 0 3px rgba(99,91,255,0.11); }
.match-tile.matched { border-color: rgba(7,132,93,0.35); color: var(--known-strong); background: var(--known); opacity: .62; }
.match-tile.wrong-flash { animation: matchWrong 300ms ease; }
.match-feedback { min-height: 1.5em; color: var(--muted); text-align: center; font-weight: 800; }
@keyframes matchWrong { 0%,100% { transform: translateX(0); } 30% { transform: translateX(-6px); } 70% { transform: translateX(6px); } }

/* Dialogs and toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 80;
  max-width: calc(100% - 30px);
  padding: 11px 15px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 13px;
  color: white;
  background: rgba(21,25,45,0.94);
  box-shadow: 0 16px 45px rgba(0,0,0,.27);
  backdrop-filter: blur(15px);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 16px) scale(.98);
  transition: opacity 170ms ease, transform 170ms ease;
}
.toast.show { opacity: 1; transform: translate(-50%,0) scale(1); }
dialog {
  width: min(440px, calc(100% - 28px));
  padding: 0;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.84);
  border-radius: 23px;
  background: rgba(255,255,255,.96);
  box-shadow: var(--shadow-strong);
}
dialog[open] { animation: dialogIn 180ms ease-out; }
@keyframes dialogIn { from { opacity: 0; transform: translateY(12px) scale(.97); } to { opacity: 1; transform: none; } }
dialog::backdrop { background: rgba(13,17,34,.54); backdrop-filter: blur(7px); }
dialog form { padding: 25px; }
dialog h2 { margin: 0 0 8px; letter-spacing: -0.035em; }
dialog p { color: var(--muted); line-height: 1.55; }
.dialog-actions { display: flex; align-items: center; justify-content: flex-end; gap: 8px; margin-top: 20px; }
.dialog-action-spacer { flex: 1; }
.dialog-close { position: absolute; top: 12px; right: 12px; width: 37px; height: 37px; padding: 0; border-color: var(--border); border-radius: 50%; background: rgba(255,255,255,.82); font-size: 1.35rem; line-height: 1; box-shadow: none; }
.details-dialog { width: min(640px, calc(100% - 28px)); }
.details-dialog-shell, .keybind-dialog-shell { position: relative; }
.detail-eyebrow { color: var(--accent); font-size: .68rem; font-weight: 900; letter-spacing: .12em; }
.details-dialog h2 { margin: 7px 42px 25px 0; padding: .03em 0 .14em; color: #14182c; font-size: clamp(2.7rem, 8vw, 4.8rem); line-height: 1.08; letter-spacing: -.05em; overflow-wrap: anywhere; }
.detail-row { display: grid; grid-template-columns: 118px 1fr; gap: 15px; align-items: start; margin-bottom: 16px; }
.detail-label { color: var(--muted); font-size: .7rem; font-weight: 900; text-transform: uppercase; letter-spacing: .09em; }
.detail-row p { margin: 0; color: var(--text); font-size: 1.04rem; line-height: 1.58; }
.quick-gloss { color: var(--accent) !important; font-size: 1.35rem !important; font-weight: 900; }
.pronunciation-line { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.icon-button { border-color: rgba(99,91,255,.22); color: var(--accent); background: var(--accent-soft); }
.details-notice { margin: 8px 0 12px; color: var(--muted); font-size: .78rem; line-height: 1.45; }
.source-link { color: var(--accent); font-size: .8rem; font-weight: 800; }
.settings-intro { margin-bottom: 16px; }
.keybind-list { display: grid; gap: 8px; }
.keybind-error { min-height: 1.2em; color: var(--wrong-strong); font-size: .8rem; font-weight: 750; }

/* Motion accessibility */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

@media (max-width: 1160px) {
  .active-word-panel { grid-template-columns: minmax(190px,1fr) auto minmax(430px,2fr); }
  .active-navigation { grid-column: 1 / -1; display: flex; justify-content: flex-end; }
  .groups-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
}
@media (max-width: 860px) {
  .summary-bar { grid-template-columns: repeat(3,1fr); margin-inline: 8px; }
  .active-word-panel { position: static; grid-template-columns: 1fr auto; }
  .active-actions { grid-column: 1 / -1; }
  .active-navigation { grid-column: 1 / -1; justify-content: center; }
  .groups-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .learning-progress-card { grid-template-columns: 1fr; }
  .learning-score { justify-items: start; }
}
@media (max-width: 640px) {
  .app-shell { width: min(100% - 16px,1480px); padding-top: 8px; }
  .topbar { min-height: 0; align-items: flex-start; gap: 13px; padding: 17px; border-radius: 21px; }
  .brand { gap: 11px; }
  .brand-mark { width: 44px; height: 44px; border-radius: 14px; font-size: 21px; }
  .brand h1 { font-size: 1.35rem; }
  .brand p { display: none; }
  .day-control { min-width: 132px; padding: 9px; }
  .summary-bar { grid-template-columns: repeat(2,1fr); gap: 7px; margin-top: -8px; }
  .summary-item:last-child { grid-column: 1 / -1; }
  .mode-switch { width: 100%; flex-wrap: wrap; }
  .mode-button { flex: 1; min-width: calc(50% - 4px); }
  .toolbar { gap: 6px; padding: 8px; }
  .toolbar > button, .more-menu summary { font-size: .76rem; }
  button.danger-ghost { margin-left: 0; }
  .active-word-panel { grid-template-columns: 1fr; }
  .active-status { grid-row: 1; grid-column: 1; justify-self: end; }
  .active-word-meta { padding-right: 94px; }
  .active-actions { grid-template-columns: repeat(2,1fr); }
  .active-navigation { display: grid; grid-template-columns: repeat(4,1fr); justify-content: stretch; }
  .active-navigation button { width: 100%; }
  .groups-grid { grid-template-columns: 1fr; gap: 12px; }
  .group-column:hover { transform: none; }
  .word-row { min-height: 38px; }
  .learning-header { align-items: stretch; flex-direction: column; padding: 18px; border-radius: 21px; }
  .learning-group-control { min-width: 0; }
  .learn-card, .quiz-card, .quiz-summary { border-radius: 20px; }
  .learn-card-content { min-height: 330px; padding: 30px 20px; }
  .quiz-card { min-height: 400px; padding: 30px 17px; }
  .quiz-choices { grid-template-columns: 1fr; }
  .quiz-typing > div { grid-template-columns: 1fr; }
  .quiz-result-answers { grid-template-columns: 1fr; gap: 2px; }
  .quiz-result-answers dd { margin-bottom: 7px; }
  .match-board { gap: 9px; }
  .match-tile { min-height: 68px; padding: 8px 6px; font-size: .9rem; }
  .match-instructions { align-items: flex-start; flex-direction: column; }
  .learning-card-actions button { flex: 1; min-width: 135px; }
  .detail-row { grid-template-columns: 1fr; gap: 5px; }
  .dialog-actions.keybind-actions { align-items: stretch; flex-direction: column; }
  .dialog-action-spacer { display: none; }
}

/* Compatibility details for settings and learning-mode visibility */
.learning-mode .mountain-only { display: none !important; }
.learning-mode .summary-bar { margin-bottom: 12px; }
.detail-quick-row {
  padding: 13px 14px;
  border: 1px solid rgba(99,91,255,0.18);
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent-soft), #effaf8);
}
.keybind-dialog { width: min(740px, calc(100% - 28px)); }
.keybind-dialog-shell { position: relative; }
.keybind-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-height: min(58vh, 540px);
  overflow: auto;
  padding: 2px 5px 5px 2px;
}
.keybind-row {
  display: grid;
  grid-template-columns: minmax(135px, 1fr) minmax(120px, .9fr);
  align-items: center;
  gap: 10px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-2);
}
.keybind-row label { font-size: .8rem; font-weight: 800; }
.keybind-input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 9px 10px;
  color: var(--text);
  background: white;
  text-align: center;
  font: 750 .78rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace;
}
.keybind-input.is-capturing {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: 0 0 0 3px rgba(99,91,255,.13);
}
.keybind-actions { align-items: center; }
@media (max-width: 860px) { .keybind-list { grid-template-columns: 1fr; } }
@media (max-width: 640px) { .keybind-row { grid-template-columns: 1fr; gap: 5px; } }

/* Prevent glyph descenders (g, j, p, q, y) from being clipped in compact UI text. */
.word-row, .mark-button, .mode-button, .quiz-choice, .match-tile, .menu-panel button, .file-button {
  overflow: visible;
}
.word-row > span, .group-title strong, .group-title span, .active-word-meta strong,
.learn-card-content h3, .learn-quick-meaning, .quiz-card h3, .details-dialog h2 {
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}