:root {
  --bg: #efe6d9;
  --ink: #2c241d;
  --muted: #6d6258;
  --accent: #9c3b2e;
  --paper: #fffaf3;
  --line: #d9cbb8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(900px 420px at 50% -8%, #fffaf3, transparent 70%),
    var(--bg);
  font-family: "Yu Gothic UI", "Yu Gothic", "Hiragino Sans", Meiryo, sans-serif;
}

button {
  font: inherit;
  color: inherit;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 22px 16px 28px;
}

header {
  text-align: center;
}

h1 {
  margin: 0;
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.lede {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.timer {
  margin: 0 0 8px;
  font-size: 2rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
}

.timer.is-stopped {
  color: var(--accent);
}

.toolbar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 14px;
  margin-top: 14px;
}

.restart {
  min-height: 44px;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: #fffaf3;
  padding: 0 16px;
  cursor: pointer;
}

.restart:disabled {
  opacity: 0.45;
  cursor: default;
}

.back {
  color: var(--muted);
  font-size: 0.92rem;
}

.restart:focus-visible,
.back:focus-visible {
  outline: 2px solid #c9842a;
  outline-offset: 2px;
}

.message {
  margin: 12px 0 0;
  color: var(--accent);
}

.play {
  position: relative;
  margin-top: 14px;
  max-width: 100%;
}

canvas {
  display: block;
  max-width: 100%;
  border-radius: 12px;
  touch-action: none;
  cursor: grab;
  box-shadow: 0 14px 36px rgba(55, 32, 16, 0.16);
}

canvas.is-dragging {
  cursor: grabbing;
}

.clear {
  position: absolute;
  left: 0;
  right: 0;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 4%;
  background: linear-gradient(to top, rgba(24, 14, 10, 0.78), rgba(24, 14, 10, 0));
  color: #fffaf3;
  font-size: clamp(2rem, 5vw, 3.1rem);
  font-weight: 700;
  letter-spacing: 0.28em;
  text-indent: 0.28em;
  pointer-events: none;
}

.clear[hidden] {
  display: none;
}