:root {
  --bg: #f8f5ee;
  --ink: #171512;
  --muted: #746f66;
  --line: #ded7cc;
  --paper: #fffdf8;
  --accent: #ff5a3d;
  --accent-dark: #cf3524;
  --mint: #44b59a;
  --blue: #5375d7;
  --shadow: 0 18px 55px rgba(42, 32, 20, 0.12);
}

* {
  box-sizing: border-box;
}

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

body {
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input {
  font: inherit;
}

.app-shell {
  min-height: 100vh;
  position: relative;
  z-index: 2;
}

.screen {
  display: none;
  min-height: 100vh;
  padding: clamp(24px, 4vw, 56px);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 260ms ease, transform 260ms ease;
}

.screen-active {
  display: flex;
  opacity: 1;
  transform: translateY(0);
}

.landing-screen,
.reference-screen,
.result-screen {
  align-items: center;
  flex-direction: column;
  justify-content: center;
  text-align: center;
}

.brand {
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 34px;
  padding: 8px 14px;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: clamp(4rem, 12vw, 10.5rem);
  letter-spacing: 0;
  line-height: 0.86;
  max-width: 1050px;
}

h2 {
  font-size: clamp(2.6rem, 7vw, 6.6rem);
  letter-spacing: 0;
  line-height: 0.92;
}

.landing-screen p {
  color: var(--muted);
  font-size: clamp(1.1rem, 2vw, 1.45rem);
  margin: 24px 0 36px;
}

.button,
.icon-button {
  border: 0;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

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

.button:active,
.icon-button:active {
  transform: translateY(1px) scale(0.98);
}

.button {
  border-radius: 8px;
  font-weight: 760;
  min-height: 48px;
  padding: 0 22px;
}

.button-primary {
  background: var(--accent);
  box-shadow: 0 14px 28px rgba(255, 90, 61, 0.24);
  color: white;
}

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

.button-secondary {
  background: var(--ink);
  color: white;
}

.button-quiet {
  background: white;
  border: 1px solid var(--line);
  color: var(--ink);
}

.daily-challenge {
  align-items: center;
  background: rgba(255, 253, 248, 0.82);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  display: flex;
  gap: 18px;
  justify-content: space-between;
  margin-top: 66px;
  max-width: 520px;
  padding: 16px;
  text-align: left;
  width: min(100%, 520px);
}

.daily-challenge strong,
.daily-challenge small {
  display: block;
}

.daily-challenge strong {
  font-size: 1.4rem;
}

.daily-challenge small,
.mini-label {
  color: var(--muted);
}

.mini-label {
  display: block;
  font-size: 0.74rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.choose-screen {
  flex-direction: column;
}

.choose-screen h2 {
  margin: 46px 0 34px;
  max-width: 760px;
}

.back-button {
  align-items: center;
  background: white;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  display: inline-flex;
  font-size: 1.5rem;
  height: 44px;
  justify-content: center;
  width: 44px;
}

.shape-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
}

.shape-category h3 {
  font-size: 1rem;
  letter-spacing: 0.08em;
  margin: 10px 0 12px;
  text-transform: uppercase;
}

.category-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.shape-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 28px rgba(42, 32, 20, 0.06);
  cursor: pointer;
  min-height: 190px;
  padding: 16px;
  text-align: left;
}

.shape-card canvas {
  display: block;
  height: 112px;
  margin: 0 auto 12px;
  transition: transform 220ms ease;
  width: 112px;
}

.shape-card:hover canvas {
  transform: rotate(-4deg) scale(1.08);
}

.shape-card strong,
.shape-card span {
  display: block;
}

.shape-card strong {
  font-size: 1.1rem;
}

.shape-card span {
  color: var(--muted);
  font-size: 0.86rem;
  margin-top: 4px;
}

.difficulty-easy {
  color: var(--mint) !important;
}

.difficulty-medium {
  color: var(--blue) !important;
}

.difficulty-hard {
  color: var(--accent-dark) !important;
}

.top-row,
.draw-header {
  align-items: center;
  display: flex;
  justify-content: space-between;
  width: 100%;
}

.toggle,
.sound-toggle,
.overlay-toggle,
.brush-control {
  align-items: center;
  color: var(--muted);
  display: inline-flex;
  gap: 8px;
  user-select: none;
}

.reference-screen h2 {
  margin-top: 26px;
}

.reference-canvas {
  height: min(58vw, 320px);
  margin-top: 28px;
  width: min(58vw, 320px);
}

.countdown {
  color: var(--accent);
  font-size: clamp(3rem, 10vw, 7rem);
  font-weight: 900;
  height: 1.1em;
  line-height: 1;
  margin-top: 12px;
}

.draw-screen {
  flex-direction: column;
  gap: 18px;
}

.draw-header h2 {
  font-size: clamp(2rem, 5vw, 4.4rem);
}

.timer {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-weight: 800;
}

.canvas-wrap {
  align-self: center;
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  max-width: 1050px;
  overflow: hidden;
  position: relative;
  width: 100%;
}

.drawing-canvas {
  display: block;
  height: min(62vh, 620px);
  touch-action: none;
  width: 100%;
}

.empty-hint {
  color: #c4bbae;
  font-size: clamp(3rem, 9vw, 8rem);
  font-weight: 900;
  left: 50%;
  pointer-events: none;
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
}

.reference-thumb {
  background: rgba(255, 253, 248, 0.94);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 28px rgba(42, 32, 20, 0.1);
  position: absolute;
  right: 14px;
  top: 14px;
}

.toolbar {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.icon-button {
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  font-size: 1.45rem;
  font-weight: 900;
  height: 48px;
  width: 48px;
}

.brush-control {
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
  height: 48px;
  padding: 0 12px;
}

.brush-control input {
  accent-color: var(--accent);
  width: 120px;
}

.sound-toggle {
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
  height: 48px;
  padding: 0 12px;
}

.score-burst {
  margin-bottom: 28px;
}

.score-burst span {
  display: block;
  font-size: clamp(5rem, 16vw, 12rem);
  font-weight: 950;
  letter-spacing: 0;
  line-height: 0.8;
}

.score-burst strong,
.score-burst em {
  display: block;
}

.score-burst strong {
  color: var(--accent);
  font-size: clamp(1.3rem, 3vw, 2.4rem);
  letter-spacing: 0.08em;
}

.score-burst em {
  font-size: clamp(1.5rem, 4vw, 3.8rem);
  font-style: normal;
  font-weight: 900;
  margin-top: 8px;
}

.comparison {
  align-items: center;
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr auto 1fr;
  max-width: 760px;
  width: 100%;
}

.compare-pane {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
}

.compare-pane span {
  color: var(--muted);
  display: block;
  font-weight: 800;
  margin-bottom: 8px;
}

.compare-pane canvas,
.overlay-canvas {
  background: white;
  border-radius: 8px;
  height: auto;
  max-width: 100%;
}

.versus {
  color: var(--muted);
  font-weight: 900;
}

.overlay-toggle {
  margin: 20px 0 12px;
}

.score-grid,
.stats-strip {
  display: grid;
  gap: 10px;
  margin-top: 18px;
  max-width: 900px;
  width: 100%;
}

.score-grid {
  grid-template-columns: repeat(5, 1fr);
}

.stats-strip {
  grid-template-columns: repeat(5, 1fr);
}

.score-grid div,
.stats-strip div {
  background: rgba(255, 253, 248, 0.8);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
}

.score-grid span,
.stats-strip span {
  color: var(--muted);
  display: block;
  font-size: 0.78rem;
  font-weight: 800;
}

.score-grid strong,
.stats-strip strong {
  display: block;
  font-size: 1.25rem;
  margin-top: 4px;
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 24px;
}

.share-status {
  color: var(--muted);
  min-height: 1.4em;
  padding-top: 12px;
}

.fx-canvas {
  inset: 0;
  pointer-events: none;
  position: fixed;
  z-index: 4;
}

.bg-shapes {
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  position: fixed;
  z-index: 1;
}

.float-shape {
  border: 2px solid rgba(23, 21, 18, 0.14);
  height: 70px;
  position: absolute;
  width: 70px;
  animation: drift 16s ease-in-out infinite alternate;
}

.float-shape:nth-child(2n) {
  border-radius: 50%;
}

.float-shape:nth-child(3n) {
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
}

@keyframes drift {
  from {
    transform: translate3d(-12px, 8px, 0) rotate(-8deg);
  }
  to {
    transform: translate3d(16px, -20px, 0) rotate(12deg);
  }
}

.shake {
  animation: shake 380ms ease both;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  50% { transform: translateX(7px); }
  75% { transform: translateX(-4px); }
}

@media (max-width: 720px) {
  .screen {
    padding: 18px;
  }

  .daily-challenge,
  .top-row,
  .draw-header {
    align-items: stretch;
    flex-direction: column;
  }

  .draw-header {
    gap: 12px;
  }

  .drawing-canvas {
    height: 58vh;
  }

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

  .versus {
    display: none;
  }

  .score-grid,
  .stats-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .score-grid div:first-child {
    grid-column: span 2;
  }
}