:root {
  --bg: #f4f2ec;
  --ink: #1f2521;
  --ink-soft: #5b6560;
  --card: #ffffff;
  --accent: #2f6f4f;
  --accent-ink: #ffffff;
  --border: #e1ddd0;
  --shadow: 0 12px 30px rgba(31, 37, 33, 0.10);
  --radius: 18px;
  --bg-c1: hsl(350, 70%, 88%);
  --bg-c2: hsl(200, 70%, 88%);
  --bg-c3: hsl(130, 70%, 88%);
  --bg-c4: hsl(45, 70%, 88%);
  --bg-c5: hsl(270, 70%, 88%);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(at 12% 18%, var(--bg-c1) 0px, transparent 55%),
    radial-gradient(at 85% 12%, var(--bg-c2) 0px, transparent 55%),
    radial-gradient(at 90% 85%, var(--bg-c3) 0px, transparent 55%),
    radial-gradient(at 12% 88%, var(--bg-c4) 0px, transparent 55%),
    radial-gradient(at 50% 50%, var(--bg-c5) 0px, transparent 65%),
    var(--bg);
  background-attachment: fixed;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  min-height: 100%;
  -webkit-text-size-adjust: 100%;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 16px 48px;
  gap: 28px;
}

.app-header {
  width: 100%;
  max-width: 640px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  text-align: center;
}

.app-header h1 {
  font-size: clamp(22px, 4vw, 30px);
  margin: 0;
  font-weight: 700;
  letter-spacing: -0.01em;
}

#collectionSelect {
  width: 100%;
  max-width: 380px;
  padding: 12px 16px;
  font-size: 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--ink);
  box-shadow: var(--shadow);
  appearance: none;
  -webkit-appearance: none;
}

.wheel-area {
  width: 100%;
  max-width: 640px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.wheel-wrap {
  position: relative;
  width: min(90vw, 420px);
  height: min(90vw, 420px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.wheel {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  box-shadow: var(--shadow), 0 0 0 8px var(--card);
  will-change: transform;
  transform: rotate(0deg);
}

.wheel canvas {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 50%;
}

.pointer {
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 16px solid transparent;
  border-right: 16px solid transparent;
  border-top: 28px solid var(--accent);
  z-index: 3;
  filter: drop-shadow(0 3px 4px rgba(0,0,0,0.2));
}

.hub {
  position: absolute;
  width: 22%;
  height: 22%;
  border-radius: 50%;
  background: var(--card);
  box-shadow: 0 2px 8px rgba(0,0,0,0.18);
  z-index: 2;
}

.status-message {
  text-align: center;
  color: var(--ink-soft);
  font-size: 16px;
  max-width: 320px;
}

.spin-button {
  appearance: none;
  border: none;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 18px;
  font-weight: 700;
  padding: 16px 48px;
  border-radius: 999px;
  box-shadow: var(--shadow);
  cursor: pointer;
  touch-action: manipulation;
  transition: transform 0.12s ease, opacity 0.2s ease;
}

.spin-button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.spin-button:not(:disabled):active {
  transform: scale(0.96);
}

.add-video-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-top: -8px;
}

.add-video-toggle {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--accent);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  padding: 6px 10px;
}

.add-video-form {
  display: flex;
  gap: 8px;
  width: 100%;
  max-width: 380px;
}

.add-video-form[hidden] {
  display: none;
}

.add-video-input {
  flex: 1;
  min-width: 0;
  padding: 12px 14px;
  font-size: 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--ink);
}

.add-video-submit {
  appearance: none;
  border: none;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 15px;
  font-weight: 700;
  padding: 0 20px;
  border-radius: 12px;
  cursor: pointer;
}

.add-video-message {
  margin: 0;
  text-align: center;
  color: var(--ink-soft);
  font-size: 14px;
  max-width: 320px;
}

.winner-overlay {
  position: fixed;
  inset: 0;
  background: rgba(31, 37, 33, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 10;
}

.winner-overlay[hidden] {
  display: none;
}

.winner-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 32px 28px;
  max-width: 420px;
  width: 100%;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0,0,0,0.3);
}

.winner-label {
  margin: 0 0 8px;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-weight: 700;
}

.winner-thumb-link {
  display: block;
  margin: 0 0 16px;
}

.winner-thumb-link[hidden] {
  display: none;
}

.winner-thumb {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 12px;
  background: var(--border);
}

.winner-title {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
}

.winner-note {
  margin: 0 0 18px;
  color: var(--ink-soft);
  font-size: 15px;
}

.winner-watch {
  display: inline-block;
  margin: 0 0 18px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  font-size: 16px;
  text-decoration: none;
  padding: 12px 28px;
  border-radius: 999px;
}

.winner-close {
  appearance: none;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  padding: 10px 24px;
  border-radius: 999px;
  cursor: pointer;
}