:root {
  --teal: #22495a;
  --dark-teal: #1a3642;
  --beige: #d8c7bd;
  --light-beige: #f2ebe7;
  --cream: #fafafa;
  --text: #1f2937;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.04), 0 2px 4px -1px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Noto Sans", "Outfit", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--cream);
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-x: hidden;
  position: relative;
}

body::before,
body::after {
  content: "";
  position: fixed;
  z-index: -1;
  border-radius: 50%;
  pointer-events: none;
}

body::before {
  width: 520px;
  height: 520px;
  right: -120px;
  top: -160px;
  background: rgba(216, 199, 189, 0.28);
  filter: blur(84px);
}

body::after {
  width: 640px;
  height: 640px;
  left: -220px;
  bottom: -280px;
  background: rgba(34, 73, 90, 0.14);
  filter: blur(108px);
}

.shell {
  width: min(1220px, 96vw);
  padding: 14px 12px 20px;
  display: grid;
  gap: 12px;
  animation: rise 420ms ease-out;
}

.title-bar {
  background: #fff;
  border: 1px solid rgba(229, 231, 235, 0.88);
  border-radius: 18px;
  padding: 12px 16px;
  box-shadow: var(--shadow-card);
}

.title-bar h1 {
  margin: 0;
  font-family: "Noto Serif", "Forum", "Caudex", serif;
  font-size: clamp(1.58rem, 3vw, 2.32rem);
  letter-spacing: 0.02em;
  color: var(--teal);
}

.title-bar p {
  margin: 6px 0 0;
  font-size: 0.98rem;
  color: #4b5563;
}

.stage-wrap {
  background: #fff;
  border-radius: 18px;
  border: 1px solid rgba(229, 231, 235, 0.9);
  padding: 8px;
  box-shadow: var(--shadow-lg);
}

canvas {
  display: block;
  width: 100%;
  height: min(72vh, 720px);
  border-radius: 14px;
  background: transparent;
  touch-action: none;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  padding: 10px 16px;
  font: 600 0.94rem "Noto Sans", "Outfit", sans-serif;
  color: #4b5563;
  background: #fff;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.btn:hover {
  transform: translateY(-1px);
  background: var(--gray-100);
}

.btn:active {
  transform: translateY(1px);
}

.btn.accent {
  background: var(--teal);
  border-color: var(--dark-teal);
  color: #fff;
}

.btn.accent:hover {
  background: var(--dark-teal);
}

.btn.ghost {
  background: var(--light-beige);
  border-color: rgba(216, 199, 189, 0.95);
  color: var(--teal);
}

.btn[hidden] {
  display: none;
}

.hint {
  min-height: 1.5em;
  margin: 0;
  font-size: 0.95rem;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(229, 231, 235, 0.9);
  border-radius: 12px;
  padding: 9px 11px;
  color: #4b5563;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 700px) {
  .shell {
    width: 98vw;
    padding: 10px;
  }

  canvas {
    height: 58vh;
  }

  .btn {
    flex: 1 1 48%;
    text-align: center;
  }
}

.site-footer {
  width: min(1220px, 96vw);
  margin: 0 auto;
  padding: 14px 0 18px;
  text-align: center;
  font-size: 0.88rem;
  color: var(--gray-400);
  letter-spacing: 0.01em;
}