:root {
  --bg: #fff7df;
  --surface: #fffaf0;
  --surface-strong: #ffffff;
  --ink: #263238;
  --muted: #68747a;
  --line: #eadfca;
  --accent: #22a7b8;
  --accent-dark: #0b7285;
  --accent-soft: #dff7fb;
  --sun: #ffc857;
  --berry: #ff6b8a;
  --leaf: #6bcf77;
  --grape: #8d7cf6;
  --success: #198754;
  --success-soft: #e3f8df;
  --danger: #d44848;
  --danger-soft: #ffe8df;
  --shadow: 0 20px 44px rgba(109, 78, 38, 0.16);
  --radius: 18px;
  --motion: 180ms cubic-bezier(0.2, 0.8, 0.2, 1);
  color-scheme: light;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  height: 100vh;
  height: 100dvh;
  min-height: 0;
  margin: 0;
  overflow: hidden;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(34, 167, 184, 0.08) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255, 200, 87, 0.12) 1px, transparent 1px),
    var(--bg);
  background-size: 30px 30px;
}

body::before {
  content: "";
  position: fixed;
  left: 18px;
  right: 18px;
  top: 10px;
  height: 120px;
  z-index: -1;
  background:
    linear-gradient(135deg, rgba(255, 107, 138, 0.18) 25%, transparent 25%) 0 0 / 44px 44px,
    linear-gradient(135deg, transparent 75%, rgba(141, 124, 246, 0.16) 75%) 0 0 / 44px 44px;
  transform: rotate(-2deg);
  pointer-events: none;
}

button,
select,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

button:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: 4px solid rgba(255, 200, 87, 0.72);
  outline-offset: 3px;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 340px);
  gap: 16px;
  width: min(1360px, calc(100% - 32px));
  height: 100%;
  min-height: 0;
  margin: 0 auto;
  padding: 10px 0;
  align-items: stretch;
}

.practice-panel,
.status-panel {
  border: 2px solid rgba(255, 255, 255, 0.92);
  background: rgba(255, 250, 240, 0.96);
  box-shadow: var(--shadow);
}

.practice-panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 0;
  overflow: hidden;
  padding: 16px 20px;
  border-radius: var(--radius);
}

.top-bar,
.controls-row,
.word-meta,
.audio-actions,
.section-heading,
.bottom-actions,
.progress-card,
.mini-board {
  display: flex;
  align-items: center;
}

.top-bar,
.section-heading,
.bottom-actions,
.mini-board {
  justify-content: space-between;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--berry);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 2.25rem;
  line-height: 1.05;
  letter-spacing: 0;
}

.page-subtitle {
  margin-top: 3px;
  color: #4f5f66;
  font-size: 0.92rem;
  line-height: 1.4;
}

h2 {
  font-size: 1rem;
}

.round-meter {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: baseline;
  min-width: 104px;
  padding: 8px 10px;
  border: 2px solid #fff;
  border-radius: var(--radius);
  background: linear-gradient(160deg, #fff, #fff4c7);
  color: var(--muted);
  font-weight: 800;
}

.round-meter span:first-child {
  color: var(--berry);
  font-size: 1.65rem;
  text-align: right;
}

.meter-divider {
  padding: 0 6px;
}

.controls-row,
.settings-card {
  flex-wrap: wrap;
  gap: 10px;
}

.field-label {
  color: #4f5f66;
  font-size: 0.92rem;
  font-weight: 700;
}

select {
  min-height: 46px;
  min-width: 180px;
  border: 2px solid #fff;
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  box-shadow: 0 5px 0 rgba(38, 50, 56, 0.08);
  padding: 0 38px 0 14px;
}

#word-audio-source-select {
  min-width: 128px;
}

.button,
.text-button {
  min-height: 46px;
  border-radius: var(--radius);
  border: 2px solid transparent;
  font-weight: 800;
  transition:
    transform var(--motion),
    background-color var(--motion),
    border-color var(--motion);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 6px 0 rgba(38, 50, 56, 0.12);
  padding: 0 18px;
}

.button:hover,
.text-button:hover {
  transform: translateY(-2px);
}

.button:active,
.text-button:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 rgba(38, 50, 56, 0.12);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.58;
  transform: none;
}

.button.primary {
  background: linear-gradient(180deg, #27bfd0, var(--accent-dark));
  color: #fff;
}

.button.primary:hover {
  background: var(--accent-dark);
}

.button.secondary {
  border-color: #fff;
  background: #fff;
  color: var(--ink);
}

.button.ghost {
  border-color: #fff;
  background: linear-gradient(180deg, #fff, var(--accent-soft));
  color: var(--accent-dark);
}

.button-icon {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.22);
  font-size: 0.76rem;
}

.button.ghost .button-icon {
  background: rgba(15, 139, 141, 0.13);
}

.word-card {
  position: relative;
  flex: 1 1 240px;
  overflow: hidden;
  min-height: 230px;
  padding: 16px 22px;
  border: 3px solid #fff;
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(255, 200, 87, 0.42), transparent 34%),
    linear-gradient(90deg, rgba(34, 167, 184, 0.14), transparent 62%),
    #fff;
  box-shadow: inset 0 -8px 0 rgba(255, 200, 87, 0.18);
}

.word-card::after {
  content: "";
  position: absolute;
  right: clamp(18px, 5vw, 58px);
  bottom: 18px;
  width: clamp(96px, 18vw, 180px);
  height: clamp(70px, 12vw, 120px);
  border-radius: var(--radius);
  background:
    linear-gradient(90deg, rgba(141, 124, 246, 0.16) 0 30%, transparent 30% 38%, rgba(34, 167, 184, 0.16) 38% 68%, transparent 68% 76%, rgba(255, 107, 138, 0.16) 76%),
    rgba(255, 255, 255, 0.5);
  pointer-events: none;
}

.word-meta {
  position: relative;
  z-index: 1;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 800;
}

.word-meta span {
  padding: 6px 9px;
  border: 2px solid #fff;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.82);
}

.word-display {
  position: relative;
  z-index: 1;
  margin-top: 8px;
  font-size: 4.5rem;
  font-weight: 900;
  line-height: 0.92;
  letter-spacing: 0;
  text-shadow: 0 5px 0 rgba(255, 200, 87, 0.26);
}

.phonetic {
  position: relative;
  z-index: 1;
  margin-top: 6px;
  color: var(--muted);
  font-size: 1.2rem;
  font-weight: 700;
}

.meaning {
  position: relative;
  z-index: 1;
  margin-top: 4px;
  color: #7f4bd8;
  font-size: 1.1rem;
  font-weight: 900;
}

.example {
  position: relative;
  z-index: 1;
  max-width: min(620px, 100%);
  margin-top: 5px;
  color: #4f5f66;
  font-size: 0.92rem;
  font-weight: 750;
  line-height: 1.42;
}

.audio-actions {
  position: relative;
  z-index: 1;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.answer-section {
  position: relative;
  padding: 12px 14px;
  border: 3px solid #fff;
  border-radius: var(--radius);
  background: var(--surface-strong);
  box-shadow: inset 0 -7px 0 rgba(34, 167, 184, 0.09);
}

.text-button {
  min-height: 34px;
  border: 0;
  background: transparent;
  color: var(--accent-dark);
  padding: 0 4px;
}

.letter-boxes {
  display: grid;
  grid-template-columns: repeat(var(--letter-count), minmax(34px, 58px));
  gap: clamp(6px, 1.4vw, 12px);
  margin-top: 8px;
  max-width: 100%;
  overflow-x: auto;
  padding-bottom: 3px;
}

.letter-box {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  border: 3px solid #f0dcc2;
  border-radius: var(--radius);
  background: linear-gradient(180deg, #fff, #fff6dc);
  color: var(--ink);
  font-size: clamp(1.3rem, 4vw, 2rem);
  font-weight: 900;
  text-transform: uppercase;
  box-shadow: 0 6px 0 rgba(101, 78, 40, 0.1);
  transition:
    transform var(--motion),
    border-color var(--motion),
    background-color var(--motion);
}

.letter-box.active {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 0 rgba(34, 167, 184, 0.18);
}

.letter-box.correct {
  border-color: rgba(25, 135, 84, 0.55);
  background: var(--success-soft);
  animation: tile-pop 360ms var(--motion);
}

.letter-box.wrong {
  border-color: rgba(212, 72, 72, 0.65);
  background: var(--danger-soft);
  animation: tile-wiggle 320ms var(--motion);
}

.letter-input {
  position: absolute;
  left: 18px;
  right: 18px;
  top: 58px;
  width: calc(100% - 36px);
  height: 72px;
  border: 0;
  background: transparent;
  color: transparent;
  caret-color: transparent;
  opacity: 0.01;
  z-index: 2;
}

.feedback {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  margin-top: 8px;
  border-radius: var(--radius);
  background: #fff7df;
  color: var(--muted);
  font-weight: 800;
  padding: 6px 10px;
}

.feedback::before {
  content: "";
  display: inline-grid;
  place-items: center;
  flex: 0 0 26px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--sun);
  color: #553d00;
}

.feedback.success {
  color: var(--success);
  background: var(--success-soft);
}

.feedback.success::before {
  background: var(--leaf);
  color: #fff;
}

.feedback.error {
  color: var(--danger);
  background: var(--danger-soft);
}

.feedback.error::before {
  background: var(--berry);
  color: #fff;
}

.bottom-actions {
  gap: 10px;
}

.bottom-actions .button {
  min-width: 120px;
}

.status-panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px;
  border-radius: var(--radius);
  align-self: stretch;
}

.progress-card {
  gap: 12px;
  padding: 12px;
  border: 2px solid #fff;
  border-radius: var(--radius);
  background: linear-gradient(180deg, #fff, #fff3cd);
}

.progress-ring {
  display: grid;
  place-items: center;
  width: 62px;
  height: 62px;
  border: 7px solid #fff;
  border-top-color: var(--berry);
  border-right-color: var(--sun);
  border-bottom-color: var(--accent);
  border-radius: 50%;
  color: var(--accent-dark);
  font-size: 1.5rem;
  font-weight: 900;
}

.status-label,
.mini-label {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 800;
}

.status-value {
  margin-top: 4px;
  font-size: 1.35rem;
  font-weight: 900;
}

.mini-board {
  gap: 10px;
}

.mini-board > div {
  flex: 1;
  padding: 10px;
  border: 2px solid #fff;
  border-radius: var(--radius);
  background: #fff;
}

.mini-number {
  display: block;
  font-size: 1.45rem;
  font-weight: 900;
}

.word-map {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 7px;
  min-width: 0;
}

.settings-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  margin-top: auto;
  padding: 10px;
  border: 2px solid #fff;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.82);
}

.settings-card select,
.settings-card .button {
  width: 100%;
  min-height: 38px;
}

.settings-card .field-label {
  font-size: 0.82rem;
}

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 38px;
  border: 2px solid #fff;
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  font-weight: 900;
  padding: 4px 8px 4px 12px;
  box-shadow: 0 4px 0 rgba(38, 50, 56, 0.08);
}

.toggle-row input {
  appearance: none;
  position: relative;
  flex: 0 0 48px;
  width: 48px;
  height: 28px;
  border: 2px solid #d9c8ad;
  border-radius: 999px;
  background: #f4ead9;
  cursor: pointer;
  transition:
    background-color var(--motion),
    border-color var(--motion);
}

.toggle-row input::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 0 rgba(38, 50, 56, 0.15);
  transition: transform var(--motion);
}

.toggle-row input:checked {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.toggle-row input:checked::before {
  transform: translateX(20px);
  background: var(--accent);
}

.map-dot {
  display: grid;
  place-items: center;
  width: 100%;
  min-width: 0;
  min-height: 34px;
  border: 2px solid #fff;
  border-radius: var(--radius);
  background: #fff;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  padding: 0;
  box-shadow: 0 4px 0 rgba(38, 50, 56, 0.08);
}

.map-dot.current {
  border-color: var(--sun);
  color: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 0 rgba(255, 200, 87, 0.28);
}

.map-dot.done {
  border-color: rgba(23, 131, 72, 0.45);
  background: var(--success-soft);
  color: var(--success);
}

.map-dot.missed {
  border-color: rgba(183, 53, 53, 0.45);
  background: var(--danger-soft);
  color: var(--danger);
}

@media (min-width: 761px) {
  body {
    height: 100dvh;
    overflow: hidden;
  }

  .app-shell {
    height: 100%;
    min-height: 0;
  }

  .practice-panel,
  .status-panel {
    min-height: 0;
    max-height: none;
  }

  .status-panel {
    overflow: hidden;
  }

  .settings-card {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .settings-card .field-label,
  .settings-card select,
  .settings-card .button {
    grid-column: 1 / -1;
  }

  .toggle-row {
    min-width: 0;
    gap: 6px;
    padding-inline: 8px;
    font-size: 0.86rem;
  }

  .toggle-row input {
    flex-basis: 44px;
    width: 44px;
  }
}

@media (min-width: 761px) and (max-height: 820px) {
  .word-map {
    grid-template-columns: repeat(10, minmax(0, 1fr));
    gap: 6px;
  }

  .map-dot {
    min-height: 30px;
    font-size: 0.72rem;
  }

  .settings-card {
    gap: 5px;
    padding: 8px;
  }

  .settings-card select,
  .settings-card .button,
  .toggle-row {
    min-height: 36px;
  }
}

@keyframes tile-pop {
  0% {
    transform: scale(0.94);
  }
  55% {
    transform: scale(1.08) rotate(-1deg);
  }
  100% {
    transform: scale(1);
  }
}

@keyframes tile-wiggle {
  0%,
  100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-5px);
  }
  75% {
    transform: translateX(5px);
  }
}

.site-footer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  width: 100%;
  margin: 0;
  padding: 7px max(16px, calc((100% - 1328px) / 2)) 9px;
  border-top: 2px solid rgba(255, 255, 255, 0.92);
  background: rgba(255, 250, 240, 0.92);
  box-shadow: 0 -8px 24px rgba(109, 78, 38, 0.08);
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.45;
  backdrop-filter: blur(10px);
}

.site-footer strong {
  color: var(--ink);
}

.footer-links {
  display: flex;
  flex-wrap: nowrap;
  gap: 18px;
  margin: 0;
  white-space: nowrap;
}

.footer-links a {
  color: var(--accent-dark);
  font-weight: 700;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--berry);
}

@media (max-height: 680px) and (min-width: 761px) {
  .app-shell {
    padding: 7px 0;
  }

  .practice-panel {
    gap: 8px;
    padding: 12px 18px;
  }

  .eyebrow {
    margin-bottom: 3px;
  }

  h1 {
    font-size: 2.15rem;
  }

  .page-subtitle {
    font-size: 0.84rem;
  }

  .word-card {
    min-height: 205px;
    padding: 10px 16px;
  }

  .word-meta {
    font-size: 0.78rem;
  }

  .word-meta span {
    padding: 4px 7px;
  }

  .word-display {
    margin-top: 5px;
    font-size: 3.3rem;
  }

  .phonetic {
    margin-top: 3px;
    font-size: 1rem;
  }

  .meaning {
    margin-top: 2px;
    font-size: 0.95rem;
  }

  .example {
    margin-top: 2px;
    font-size: 0.8rem;
  }

  .audio-actions {
    margin-top: 5px;
  }

  .button {
    min-height: 36px;
  }

  .status-panel {
    gap: 6px;
    padding: 8px;
  }

  .progress-card {
    gap: 8px;
    padding: 7px 9px;
  }

  .progress-ring {
    width: 50px;
    height: 50px;
    border-width: 5px;
    font-size: 1.2rem;
  }

  .mini-board > div {
    padding: 6px 8px;
  }

  .mini-number {
    font-size: 1.2rem;
  }

  .word-map {
    gap: 4px;
  }

  .map-dot {
    min-height: 26px;
    font-size: 0.68rem;
  }

  .settings-card {
    gap: 3px;
    padding: 6px;
  }

  .settings-card .field-label {
    font-size: 0.72rem;
  }

  .settings-card select,
  .settings-card .button,
  .toggle-row {
    min-height: 32px;
  }

  .toggle-row {
    font-size: 0.78rem;
    padding-block: 2px;
  }

  .toggle-row input {
    flex-basis: 40px;
    width: 40px;
    height: 24px;
  }

  .toggle-row input::before {
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
  }

  .toggle-row input:checked::before {
    transform: translateX(16px);
  }

  .site-footer {
    padding-top: 5px;
    padding-bottom: 6px;
    font-size: 0.76rem;
  }

  .site-footer > p {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

@media (max-width: 760px) {
  body {
    height: auto;
    min-height: 100vh;
    overflow: auto;
    display: block;
  }

  .app-shell {
    grid-template-columns: 1fr;
    height: auto;
    width: min(100% - 20px, 720px);
    padding: 10px 0;
  }

  .practice-panel {
    overflow: visible;
  }

  .word-card {
    flex: none;
    min-height: 310px;
  }

  .site-footer {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 14px max(10px, calc((100% - 700px) / 2)) 18px;
    font-size: 0.84rem;
  }

  .footer-links {
    flex-wrap: wrap;
  }

  .word-map {
    grid-template-columns: repeat(10, 1fr);
  }

  .settings-card {
    margin-top: 0;
  }
}

@media (max-width: 560px) {
  h1 {
    font-size: 2rem;
  }

  .practice-panel,
  .status-panel {
    padding: 16px;
  }

  .top-bar {
    align-items: flex-start;
    gap: 14px;
  }

  .round-meter {
    min-width: 86px;
    padding: 8px 10px;
  }

  .round-meter span:first-child {
    font-size: 1.55rem;
  }

  .controls-row,
  .bottom-actions {
    align-items: stretch;
  }

  .audio-actions {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: stretch;
  }

  select,
  .controls-row .button,
  .bottom-actions .button {
    min-height: 50px;
    width: 100%;
  }

  .audio-actions .button {
    min-height: 50px;
    width: 100%;
    gap: 5px;
    padding: 0 8px;
    font-size: 0.88rem;
  }

  .word-card {
    min-height: 250px;
  }

  .word-map {
    grid-template-columns: repeat(6, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}