:root {
  color-scheme: light;
  --bg: #f5f4ef;
  --surface: #fffefb;
  --text: #1e2722;
  --muted: #7a817c;
  --faint: #c8ccc8;
  --line: #e7e7e1;
  --accent: #287a58;
  --accent-hover: #216849;
  --accent-soft: #e5f3ec;
  --danger: #d85c4a;
  --danger-soft: #ffebe7;
  --left-hand: #d97745;
  --left-hand-soft: #fff0e7;
  --right-hand: #3977b9;
  --right-hand-soft: #eaf4ff;
  --shadow: 0 20px 60px rgba(31, 45, 37, 0.08);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #151916;
  --surface: #1d231f;
  --text: #edf3ee;
  --muted: #98a29b;
  --faint: #4d5750;
  --line: #303832;
  --accent: #68c99a;
  --accent-hover: #7bd7aa;
  --accent-soft: #253e32;
  --danger: #ff8977;
  --danger-soft: #462c28;
  --left-hand: #f0a377;
  --left-hand-soft: #3e2d25;
  --right-hand: #80b9f0;
  --right-hand-soft: #25364a;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 10% 10%, rgba(52, 150, 106, 0.08), transparent 28rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  transition: background-color 180ms ease, color 180ms ease;
}

button,
textarea {
  font: inherit;
}

button {
  color: inherit;
}

.app-shell {
  width: min(920px, calc(100% - 40px));
  margin: 0 auto;
  padding-bottom: 48px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border-radius: 9px;
  background: var(--accent);
  color: var(--surface);
  font-family: Georgia, serif;
}

.theme-button {
  display: grid;
  width: 40px;
  height: 40px;
  cursor: pointer;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
  font-size: 19px;
}

.theme-button:hover {
  border-color: var(--accent);
}

.hero {
  padding: 76px 0 42px;
  text-align: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

h1 {
  margin: 0;
  font-family: Georgia, "Noto Serif SC", serif;
  font-size: clamp(30px, 5vw, 50px);
  font-weight: 500;
  letter-spacing: -0.035em;
}

.subtitle {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.practice-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--line);
}

.stat-item {
  display: flex;
  min-height: 88px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.stat-item + .stat-item {
  border-left: 1px solid var(--line);
}

.stat-item strong {
  font-size: 23px;
  font-variant-numeric: tabular-nums;
}

.stat-item span {
  margin-top: 5px;
  color: var(--muted);
  font-size: 12px;
}

.calibration {
  padding: 48px 64px 50px;
  text-align: center;
}

.calibration[hidden],
.practice-content[hidden] {
  display: none;
}

.step-label {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.08em;
}

.calibration h2 {
  margin: 0;
  font-family: Georgia, "Noto Serif SC", serif;
  font-size: clamp(23px, 4vw, 32px);
  font-weight: 500;
}

.calibration > p {
  margin: 12px 0 0;
  color: var(--muted);
}

.home-row {
  display: flex;
  gap: clamp(24px, 7vw, 70px);
  justify-content: center;
  margin: 38px auto 30px;
}

.home-group {
  display: flex;
  gap: 8px;
}

.home-key {
  position: relative;
  display: flex;
  width: clamp(48px, 7vw, 62px);
  height: clamp(56px, 8vw, 68px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-bottom-width: 4px;
  border-radius: 10px;
  background: var(--bg);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 20px;
  font-weight: 700;
  transition: 160ms ease;
}

.home-key small {
  margin-top: 5px;
  color: var(--muted);
  font-family: inherit;
  font-size: 9px;
  font-weight: 500;
}

.left-hand .home-key {
  border-color: color-mix(in srgb, var(--left-hand) 35%, var(--line));
  background: var(--left-hand-soft);
}

.right-hand .home-key {
  border-color: color-mix(in srgb, var(--right-hand) 35%, var(--line));
  background: var(--right-hand-soft);
}

.home-key.anchor::after {
  position: absolute;
  bottom: 8px;
  width: 13px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  content: "";
  opacity: 0.4;
}

.home-key.target {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
  color: var(--accent);
  transform: translateY(-5px);
}

.home-key.done {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.calibration.shake {
  animation: nudge 180ms ease-in-out 2;
}

@keyframes nudge {
  50% { transform: translateX(5px); }
}

.calibration-status {
  min-height: 20px;
  font-size: 13px;
}

.calibration-status.error {
  color: var(--danger);
}

.finger-guide {
  display: flex;
  min-height: 76px;
  gap: 13px;
  align-items: center;
  padding: 14px 64px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--accent-soft) 45%, var(--surface));
}

.next-key {
  display: grid;
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--accent);
  border-bottom-width: 3px;
  border-radius: 9px;
  background: var(--surface);
  color: var(--accent);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 19px;
  font-weight: 800;
  text-transform: uppercase;
}

.finger-guide > div {
  display: flex;
  flex-direction: column;
}

.guide-label {
  color: var(--muted);
  font-size: 10px;
}

.finger-guide strong {
  margin-top: 2px;
  font-size: 14px;
}

.return-hint {
  margin-left: auto;
  color: var(--muted);
  font-size: 12px;
}

.typing-area {
  position: relative;
  min-height: 230px;
  padding: 46px 64px;
  cursor: text;
  outline: none;
}

.typing-area:focus-visible {
  box-shadow: inset 0 0 0 2px var(--accent);
}

.prompt {
  margin: 0;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: clamp(21px, 3.3vw, 29px);
  line-height: 1.9;
  letter-spacing: 0.015em;
}

.char {
  border-radius: 3px;
  color: var(--faint);
  transition: color 80ms ease, background-color 80ms ease;
}

.char.correct {
  color: var(--text);
}

.char.incorrect {
  background: var(--danger-soft);
  color: var(--danger);
  text-decoration: underline;
  text-decoration-thickness: 2px;
}

.char.current {
  position: relative;
}

.char.current::after {
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 1px;
  background: var(--accent);
  content: "";
  animation: blink 1s steps(2, jump-none) infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.start-hint {
  position: absolute;
  right: 0;
  bottom: 16px;
  left: 0;
  display: flex;
  gap: 9px;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 13px;
  transition: opacity 150ms ease;
}

.start-hint.hidden {
  opacity: 0;
  pointer-events: none;
}

.keyboard-wrap {
  padding: 24px 40px 28px;
  border-top: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 58%, var(--surface));
}

.keyboard-status {
  min-height: 18px;
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

.keyboard-status.error {
  color: var(--danger);
  font-weight: 650;
}

.virtual-keyboard {
  display: flex;
  width: min(100%, 670px);
  flex-direction: column;
  gap: 7px;
  margin: 0 auto;
}

.keyboard-row {
  display: flex;
  gap: 7px;
  justify-content: center;
}

.keyboard-row:nth-child(2) {
  padding: 0 18px;
}

.keyboard-row:nth-child(3) {
  padding: 0 46px;
}

.virtual-key {
  position: relative;
  display: grid;
  height: 41px;
  flex: 1 1 0;
  place-items: center;
  border: 1px solid var(--line);
  border-bottom-width: 3px;
  border-radius: 7px;
  background: var(--surface);
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  transition: 100ms ease;
}

.virtual-key.left {
  border-top-color: var(--left-hand);
}

.virtual-key.right {
  border-top-color: var(--right-hand);
}

.finger-group-left-pinky { --finger-color: #df6c62; }
.finger-group-left-ring { --finger-color: #e5944c; }
.finger-group-left-middle { --finger-color: #c4a23d; }
.finger-group-left-index { --finger-color: #5fa66c; }
.finger-group-right-index { --finger-color: #3d9b91; }
.finger-group-right-middle { --finger-color: #4c8fc5; }
.finger-group-right-ring { --finger-color: #716fc2; }
.finger-group-right-pinky { --finger-color: #a56db2; }
.finger-group-thumb { --finger-color: var(--accent); }

.virtual-key[class*="finger-group-"] {
  border-top-color: var(--finger-color);
  background: color-mix(in srgb, var(--finger-color) 7%, var(--surface));
}

.virtual-key.home::after {
  position: absolute;
  bottom: 5px;
  width: 10px;
  height: 1px;
  border-radius: 2px;
  background: currentColor;
  content: "";
  opacity: 0.45;
}

.virtual-key.space {
  max-width: 310px;
  flex-basis: 310px;
  text-transform: none;
}

.virtual-key.target {
  z-index: 1;
  border-color: var(--accent);
  background: var(--accent);
  box-shadow: 0 5px 14px color-mix(in srgb, var(--accent) 30%, transparent);
  color: #fff;
  transform: translateY(-3px);
}

.virtual-key.wrong {
  border-color: var(--danger);
  background: var(--danger-soft);
  color: var(--danger);
  animation: key-wrong 180ms ease 2;
}

@keyframes key-wrong {
  50% { transform: translateY(2px); }
}

.finger-map {
  display: grid;
  grid-template-columns: minmax(230px, 1fr) 104px minmax(230px, 1fr);
  gap: 14px;
  align-items: center;
  width: min(100%, 760px);
  margin: 28px auto 0;
}

.hand-card {
  overflow: hidden;
  padding: 13px 12px 6px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
}

.hand-card-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 0 4px;
}

.hand-card-title strong {
  font-size: 13px;
}

.hand-card-title span {
  color: var(--muted);
  font-size: 9px;
}

.hand-shape {
  position: relative;
  width: 240px;
  height: 184px;
  margin: 8px auto 0;
}

.palm-shape {
  position: absolute;
  z-index: 0;
  top: 102px;
  display: grid;
  width: 156px;
  height: 76px;
  place-items: end center;
  padding-bottom: 12px;
  border: 1px solid var(--line);
  border-radius: 32px 32px 50px 50px;
  background: color-mix(in srgb, var(--muted) 8%, var(--surface));
  color: var(--muted);
  font-size: 9px;
}

.hand-left .palm-shape {
  left: 23px;
}

.hand-right .palm-shape {
  right: 23px;
}

.finger-shape {
  position: absolute;
  z-index: 1;
  display: flex;
  width: 34px;
  flex-direction: column;
  align-items: center;
  padding: 9px 3px 4px;
  border: 1px solid var(--finger-color);
  border-radius: 18px 18px 9px 9px;
  background: color-mix(in srgb, var(--finger-color) 15%, var(--surface));
  color: color-mix(in srgb, var(--finger-color) 82%, var(--text));
  text-align: center;
  transition: 140ms ease;
}

.finger-shape b {
  font-size: 8px;
  font-weight: 750;
}

.finger-shape small {
  margin-top: 6px;
  color: inherit;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 7px;
  font-weight: 700;
  line-height: 1.4;
}

.finger-shape.active {
  z-index: 3;
  background: var(--finger-color);
  box-shadow: 0 7px 18px color-mix(in srgb, var(--finger-color) 35%, transparent);
  color: #fff;
  transform: translateY(-8px) scale(1.05);
}

.finger-shape.pinky {
  top: 58px;
  height: 74px;
}

.finger-shape.ring {
  top: 34px;
  height: 99px;
}

.finger-shape.middle {
  top: 14px;
  height: 119px;
}

.finger-shape.index {
  top: 29px;
  height: 104px;
}

.hand-left .pinky { left: 7px; }
.hand-left .ring { left: 45px; }
.hand-left .middle { left: 83px; }
.hand-left .index { left: 121px; }

.hand-right .index { right: 121px; }
.hand-right .middle { right: 83px; }
.hand-right .ring { right: 45px; }
.hand-right .pinky { right: 7px; }

.finger-shape.thumb {
  top: 108px;
  width: 72px;
  height: 36px;
  justify-content: center;
  padding: 4px;
  border-radius: 18px;
}

.finger-shape.thumb small {
  margin-top: 1px;
}

.hand-left .thumb {
  right: 11px;
  transform: rotate(26deg);
}

.hand-right .thumb {
  left: 11px;
  transform: rotate(-26deg);
}

.hand-left .thumb.active {
  transform: rotate(26deg) translateY(-8px) scale(1.05);
}

.hand-right .thumb.active {
  transform: rotate(-26deg) translateY(-8px) scale(1.05);
}

.mapping-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.mapping-center span {
  color: var(--muted);
  font-size: 9px;
}

.mapping-center strong {
  margin-top: 5px;
  font-size: 12px;
}

.mapping-center i {
  margin: 5px 0;
  color: var(--accent);
  font-size: 18px;
  font-style: normal;
}

.mapping-center b {
  display: grid;
  min-width: 52px;
  height: 38px;
  padding: 0 9px;
  place-items: center;
  border: 1px solid var(--accent);
  border-bottom-width: 3px;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
}

.hand-legend {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: center;
  margin-top: 16px;
  color: var(--muted);
  font-size: 10px;
}

.color-scale {
  display: flex;
  overflow: hidden;
  border-radius: 5px;
}

.color-scale i {
  width: 11px;
  height: 8px;
  background: var(--finger-color);
}

.legend-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 5px;
  border-radius: 50%;
}

.legend-dot.left {
  background: var(--left-hand);
}

.legend-dot.right {
  background: var(--right-hand);
}

.key-icon,
kbd {
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: var(--bg);
  color: var(--muted);
}

.key-icon {
  display: grid;
  width: 23px;
  height: 23px;
  place-items: center;
  font-size: 11px;
}

.result {
  display: flex;
  gap: 14px;
  align-items: center;
  margin: 0 64px 32px;
  padding: 17px 19px;
  border-radius: 12px;
  background: var(--accent-soft);
}

.result[hidden] {
  display: none;
}

.result-icon {
  display: grid;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: var(--surface);
  font-weight: 800;
}

.result strong {
  color: var(--accent);
}

.result p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  padding: 24px 28px;
  border-top: 1px solid var(--line);
}

.button {
  min-height: 42px;
  padding: 0 20px;
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 650;
}

.button.secondary {
  border-color: var(--line);
  background: transparent;
}

.button.secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.button.primary {
  background: var(--accent);
  color: #fff;
}

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

.tip {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

kbd {
  padding: 2px 5px;
  font-family: inherit;
  font-size: 10px;
}

.typing-input {
  position: fixed;
  top: 0;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
}

@media (max-width: 640px) {
  .app-shell {
    width: min(100% - 24px, 920px);
  }

  .hero {
    padding: 44px 8px 30px;
  }

  .practice-card {
    border-radius: 18px;
  }

  .calibration {
    padding: 36px 18px 40px;
  }

  .home-row {
    gap: 14px;
  }

  .home-group {
    gap: 4px;
  }

  .home-key {
    width: clamp(34px, 10vw, 48px);
    height: 54px;
    font-size: 16px;
  }

  .home-key small {
    font-size: 7px;
  }

  .finger-guide {
    padding: 12px 24px;
  }

  .return-hint {
    max-width: 92px;
    text-align: right;
  }

  .typing-area {
    min-height: 260px;
    padding: 36px 24px 52px;
  }

  .keyboard-wrap {
    overflow-x: auto;
    padding: 20px 12px 24px;
  }

  .virtual-keyboard {
    min-width: 520px;
  }

  .finger-map {
    min-width: 680px;
  }

  .hand-legend {
    min-width: 520px;
  }

  .result {
    margin: 0 24px 24px;
  }

  .actions {
    padding: 18px;
  }

  .button {
    flex: 1;
    padding: 0 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}