:root {
  --bg: #f4f6fa;
  --surface: #ffffff;
  --soft: #f7f9fc;
  --text: #172033;
  --muted: #667085;
  --line: #e3e8f0;
  --primary: #5865e8;
  --primary2: #7659d9;
  --green: #138a63;
  --red: #cf4054;
  --orange: #d97822;
  --shadow: 0 12px 32px rgba(25, 35, 65, .06);
  color-scheme: light;
}

[data-theme="dark"] {
  --bg: #0d1320;
  --surface: #141c2b;
  --soft: #192334;
  --text: #f1f4f9;
  --muted: #99a5b8;
  --line: #28344a;
  --primary: #7580ff;
  --primary2: #9a7af0;
  --green: #42c69a;
  --red: #ff7182;
  --orange: #f2a65a;
  --shadow: 0 18px 50px rgba(0, 0, 0, .2);
  color-scheme: dark;
}

html {
  background: var(--bg);
}

body {
  background:
    radial-gradient(circle at 4% 0, color-mix(in srgb, var(--primary) 9%, transparent), transparent 27rem),
    linear-gradient(180deg, color-mix(in srgb, var(--bg) 95%, var(--surface)), var(--bg) 28rem);
  font-feature-settings: "kern" 1, "liga" 1;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  color: #fff;
  background: var(--primary);
}

button,
a,
select,
input {
  transition:
    color .18s ease,
    background-color .18s ease,
    border-color .18s ease,
    box-shadow .18s ease,
    transform .18s ease;
}

button:focus-visible,
a:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--primary) 32%, transparent);
  outline-offset: 2px;
}

.topbar {
  min-height: 66px;
  padding-block: 10px;
  border-color: color-mix(in srgb, var(--line) 84%, transparent);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  box-shadow: 0 1px 0 rgba(20, 30, 55, .02);
}

[data-theme="dark"] .topbar {
  background: color-mix(in srgb, var(--surface) 90%, transparent);
}

.brand {
  gap: 10px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 13px;
  font-size: 14px;
  letter-spacing: -.02em;
  box-shadow: 0 8px 20px color-mix(in srgb, var(--primary) 27%, transparent);
}

.brand strong {
  font-size: 14px;
  letter-spacing: -.01em;
}

.brand small {
  font-size: 10px;
  letter-spacing: .01em;
}

.desktop-nav {
  gap: 2px;
  padding: 4px;
  border: 1px solid color-mix(in srgb, var(--line) 76%, transparent);
  border-radius: 12px;
  background: color-mix(in srgb, var(--soft) 76%, transparent);
}

.desktop-nav a {
  padding: 7px 12px;
  border-radius: 8px;
  font-size: 13px;
}

.desktop-nav a:hover {
  color: var(--text);
  background: var(--surface);
  box-shadow: 0 2px 8px rgba(25, 35, 65, .06);
}

.button {
  min-height: 40px;
  padding: 8px 15px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 760;
  letter-spacing: -.005em;
}

.button-primary {
  background: linear-gradient(135deg, var(--primary), color-mix(in srgb, var(--primary) 78%, var(--primary2)));
  box-shadow: 0 8px 18px color-mix(in srgb, var(--primary) 22%, transparent);
}

.button-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 11px 24px color-mix(in srgb, var(--primary) 28%, transparent);
}

.button-soft,
.review-button,
.category-row button.active {
  color: var(--primary);
  border-color: color-mix(in srgb, var(--primary) 22%, var(--line));
  background: color-mix(in srgb, var(--primary) 8%, var(--surface));
}

[data-theme="dark"] .button-soft,
[data-theme="dark"] .review-button,
[data-theme="dark"] .category-row button.active {
  color: #c9ceff;
  border-color: #35415d;
  background: #202a40;
}

.icon-button {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: var(--soft);
}

.section {
  width: min(1120px, calc(100% - 36px));
  padding: 68px 0 12px;
}

.dashboard {
  padding-top: 28px;
}

.section-kicker,
.eyebrow {
  font-size: 10px;
  letter-spacing: .16em;
}

.section-heading-row {
  margin-bottom: 18px;
}

.section-heading-row h2,
.panel-heading h2 {
  margin-top: 4px;
  font-size: clamp(24px, 2.7vw, 31px);
  letter-spacing: -.035em;
}

.section-heading-row p {
  max-width: 660px;
  margin-top: 6px;
  font-size: 14px;
}

.hero-card {
  min-height: 342px;
  grid-template-columns: 1.3fr .7fr;
  gap: 36px;
  padding: clamp(34px, 5vw, 52px);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 24px;
  background:
    radial-gradient(circle at 87% 17%, rgba(170, 139, 255, .38), transparent 17rem),
    linear-gradient(135deg, #263269, #4549a8 57%, #7054cb);
  box-shadow: 0 22px 55px rgba(46, 48, 117, .2);
}

.hero-copy h1 {
  max-width: 720px;
  margin: 14px 0 13px;
  font-size: clamp(37px, 4.6vw, 55px);
  line-height: 1.08;
  letter-spacing: -.05em;
}

.hero-copy p {
  max-width: 650px;
  color: rgba(244, 246, 255, .82);
  font-size: 15px;
}

.hero-actions {
  margin-top: 24px;
}

.hero-visual {
  min-height: 220px;
}

.speech-core {
  width: 118px;
  height: 118px;
  border-radius: 32px;
  background: rgba(255, 255, 255, .11);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .1);
}

.voice-wave {
  height: 44px;
  display: flex;
  align-items: center;
  gap: 5px;
}

.voice-wave i {
  width: 5px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .9);
}

.voice-wave i:nth-child(1),
.voice-wave i:nth-child(7) {
  height: 12px;
}

.voice-wave i:nth-child(2),
.voice-wave i:nth-child(6) {
  height: 24px;
}

.voice-wave i:nth-child(3),
.voice-wave i:nth-child(5) {
  height: 36px;
}

.voice-wave i:nth-child(4) {
  height: 44px;
}

.speech-orbit {
  padding: 8px 11px;
  border-radius: 10px;
  color: rgba(255, 255, 255, .86);
  background: rgba(255, 255, 255, .08);
  font-size: 11px;
}

.stats-grid {
  gap: 12px;
  margin-top: 14px;
}

.stat-card {
  min-height: 92px;
  gap: 12px;
  padding: 16px;
  border-radius: 15px;
  box-shadow: 0 7px 22px rgba(25, 35, 65, .035);
}

.stat-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
}

.stat-card strong {
  font-size: 24px;
  letter-spacing: -.035em;
}

.today-grid {
  gap: 14px;
  margin-top: 14px;
}

.panel {
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.today-plan,
.progress-panel {
  padding: 22px;
}

.task-list {
  margin-top: 16px;
}

.task-row {
  padding: 11px;
  border-radius: 11px;
}

.task-row:hover {
  transform: translateX(2px);
}

.mode-grid {
  gap: 12px;
}

.mode-card {
  min-height: 205px;
  padding: 21px;
  border-radius: 17px;
  box-shadow: 0 8px 24px rgba(25, 35, 65, .045);
}

.mode-card:hover {
  border-color: color-mix(in srgb, var(--primary) 34%, var(--line));
  box-shadow: 0 14px 34px rgba(25, 35, 65, .09);
}

.mode-icon {
  min-height: 35px;
  padding: 0 10px;
  border: 1px solid color-mix(in srgb, var(--primary) 15%, transparent);
  border-radius: 9px;
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 8%, var(--surface));
  font-size: 10px;
  letter-spacing: .08em;
}

.mode-card h3 {
  margin: 20px 0 6px;
  font-size: 18px;
  letter-spacing: -.02em;
}

.mode-card p {
  font-size: 13px;
}

.library-toolbar {
  padding: 10px;
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(25, 35, 65, .035);
}

.search-box,
select {
  border-radius: 9px;
}

.lesson-grid,
.mistake-grid {
  gap: 12px;
}

.lesson-card {
  min-height: 282px;
  padding: 18px;
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(25, 35, 65, .045);
}

.lesson-card:hover {
  border-color: color-mix(in srgb, var(--primary) 25%, var(--line));
  box-shadow: 0 15px 36px rgba(25, 35, 65, .08);
}

.lesson-english {
  margin-top: 15px;
  font-size: clamp(19px, 2vw, 25px);
  letter-spacing: -.025em;
}

.correction-box {
  border: 1px solid color-mix(in srgb, var(--line) 78%, transparent);
}

.data-card {
  min-height: 225px;
}

.practice-dialog,
.record-dialog,
.word-dialog,
.confirm-dialog {
  border: 1px solid var(--line);
  color: var(--text);
  background: var(--surface);
  box-shadow: 0 34px 100px rgba(6, 12, 30, .36);
}

.practice-dialog {
  width: min(680px, calc(100% - 28px));
  max-height: min(88dvh, 820px);
  overflow: auto;
  border-radius: 19px;
}

dialog::backdrop {
  background: rgba(8, 13, 29, .7);
  backdrop-filter: blur(9px) saturate(.8);
}

.practice-header {
  position: sticky;
  top: 0;
  z-index: 3;
  padding: 17px 21px 14px;
  border-color: var(--line);
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  backdrop-filter: blur(14px);
}

.practice-header h2 {
  margin-top: 2px;
  font-size: 23px;
  letter-spacing: -.035em;
}

.practice-progress {
  padding: 13px 21px 0;
}

.progress-track {
  height: 5px;
  margin-top: 7px;
  background: color-mix(in srgb, var(--line) 55%, transparent);
}

.progress-track span {
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), var(--primary2));
}

.practice-body {
  min-height: 270px;
  padding: 23px 21px 25px;
}

.practice-prompt {
  max-width: 610px;
  margin: 10px 0;
  font-size: clamp(27px, 3.8vw, 37px);
  line-height: 1.28;
  letter-spacing: -.035em;
}

.practice-subtitle {
  margin: 6px 0 0;
  font-size: 14px;
}

.recording-panel {
  gap: 11px;
  margin-top: 16px;
  padding: 14px;
  border-radius: 13px;
  background: color-mix(in srgb, var(--soft) 92%, var(--surface));
}

.recording-status-row strong {
  font-size: 14px;
}

.recording-controls {
  gap: 8px;
}

.recording-controls .button {
  min-width: 104px;
  min-height: 38px;
  padding-inline: 13px;
}

.recording-controls [data-recording]::before {
  margin-right: 7px;
  font-size: 10px;
  font-weight: 900;
}

.recording-controls [data-recording="toggle"]::before {
  content: "●";
}

.recording-controls [data-recording="mine"]::before {
  content: "▶";
}

.recording-controls [data-recording="ai"]::before {
  content: "AI";
  padding: 1px 3px;
  border: 1px solid currentColor;
  border-radius: 4px;
  font-size: 8px;
}

.recording-note {
  line-height: 1.55;
}

.practice-answer {
  margin-top: 17px;
  padding: 15px;
  border-color: color-mix(in srgb, var(--primary) 24%, var(--line));
  border-radius: 13px;
  background: color-mix(in srgb, var(--primary) 7%, var(--surface));
}

.practice-answer strong {
  color: var(--primary);
  font-size: clamp(21px, 3.4vw, 29px);
}

.rating-area {
  position: sticky;
  bottom: 0;
  z-index: 2;
  padding: 13px 21px 18px;
  border-color: var(--line);
  background: color-mix(in srgb, var(--surface) 96%, transparent);
  backdrop-filter: blur(14px);
}

.learning-ratings button {
  min-height: 58px;
  border-radius: 10px;
}

.dictation-audio-card {
  border-radius: 13px;
}

.dictation-headphones,
.category-tag,
.level-tag,
.status-tag,
.mode-icon,
.stat-icon,
.data-icon {
  background: color-mix(in srgb, var(--primary) 8%, var(--surface));
}

[data-theme="dark"] .dictation-headphones,
[data-theme="dark"] .category-tag,
[data-theme="dark"] .level-tag,
[data-theme="dark"] .status-tag,
[data-theme="dark"] .mode-icon,
[data-theme="dark"] .stat-icon,
[data-theme="dark"] .data-icon {
  background: color-mix(in srgb, var(--primary) 12%, var(--soft));
}

[data-theme="dark"] .speech-word.match,
[data-theme="dark"] .correct,
[data-theme="dark"] .status-tag.status-know {
  background: rgba(47, 182, 137, .13);
}

[data-theme="dark"] .speech-word.miss,
[data-theme="dark"] .incorrect,
[data-theme="dark"] .status-tag.status-forget {
  background: rgba(220, 70, 91, .14);
}

[data-theme="dark"] .speech-word.extra,
[data-theme="dark"] .relearn-note,
[data-theme="dark"] .status-tag.status-fuzzy {
  background: rgba(232, 137, 47, .14);
}

.word-button {
  color: inherit;
}

.word-button:hover {
  color: var(--primary);
}

footer {
  margin-top: 62px;
  padding-top: 22px;
}

@media (max-width: 740px) {
  .section {
    width: min(100% - 24px, 1120px);
    padding-top: 52px;
  }

  .dashboard {
    padding-top: 14px;
  }

  .hero-card {
    min-height: auto;
    padding: 28px 22px;
    border-radius: 19px;
  }

  .hero-copy h1 {
    font-size: clamp(33px, 10vw, 44px);
  }

  .hero-visual {
    min-height: 170px;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .practice-body {
    min-height: 0;
  }

  .practice-prompt {
    font-size: clamp(26px, 8vw, 34px);
  }

  .recording-controls {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 430px) {
  .topbar {
    min-height: 60px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .stats-grid {
    gap: 9px;
  }

  .stat-card {
    min-height: 82px;
  }

  .practice-header,
  .practice-progress,
  .practice-body,
  .rating-area {
    padding-inline: 17px;
  }
}

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