*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-bg-1: #0a0e1a;
  --color-bg-2: #141b2d;
  --color-surface: rgba(255, 255, 255, 0.04);
  --color-surface-strong: rgba(255, 255, 255, 0.08);
  --color-border: rgba(255, 255, 255, 0.08);
  --color-text: #f5f5f7;
  --color-text-muted: #94a3b8;
  --color-accent: #7c5cff;
  --color-accent-strong: #9b85ff;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 0 1px rgba(124, 92, 255, 0.4), 0 8px 30px rgba(124, 92, 255, 0.25);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --reel-item-height: 72px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: radial-gradient(ellipse at top, var(--color-bg-2), var(--color-bg-1));
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

header {
  text-align: center;
  padding: 3.5rem 1.5rem 1rem;
}

header h1 {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #ffffff 0%, #b8a9ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.subtitle {
  color: var(--color-text-muted);
  margin-top: 0.5rem;
  font-size: 1rem;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 1rem 1.5rem 4rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* --- Picker stage --- */

.picker-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  padding: 2rem 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.reels {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  justify-content: center;
  width: 100%;
  min-height: var(--reel-item-height);
}

.reel {
  position: relative;
  width: clamp(120px, 28vw, 180px);
  height: var(--reel-item-height);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.4);
}

.reel::before,
.reel::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 18px;
  pointer-events: none;
  z-index: 2;
}

.reel::before {
  top: 0;
  background: linear-gradient(180deg, rgba(10, 14, 26, 0.9), rgba(10, 14, 26, 0));
}

.reel::after {
  bottom: 0;
  background: linear-gradient(0deg, rgba(10, 14, 26, 0.9), rgba(10, 14, 26, 0));
}

.reel-track {
  display: flex;
  flex-direction: column;
  will-change: transform;
}

.reel-cell {
  flex: 0 0 var(--reel-item-height);
  height: var(--reel-item-height);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 0.75rem;
  font-size: 1.05rem;
  font-weight: 600;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  width: 100%;
}

.reel-cell.placeholder {
  color: var(--color-text-muted);
  font-weight: 500;
}

.reel-cell.winner {
  color: var(--color-accent-strong);
  text-shadow: 0 0 20px rgba(124, 92, 255, 0.5);
}

.pick-button {
  font: inherit;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-strong));
  color: #ffffff;
  border: none;
  padding: 0.85rem 2.5rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-glow);
}

.pick-button:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 0 0 1px rgba(155, 133, 255, 0.6), 0 12px 40px rgba(124, 92, 255, 0.4);
}

.pick-button:active:not(:disabled) {
  transform: translateY(0);
}

.pick-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.seed-display {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  min-height: 1.2em;
}

/* --- Controls --- */

.controls {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding: 1.75rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.control-group label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.control-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.control-row .control-group {
  flex: 1;
  min-width: 140px;
}

.seed-control {
  flex: 2;
}

.seed-row {
  display: flex;
  gap: 0.4rem;
}

.seed-row input {
  flex: 1;
  min-width: 0;
}

textarea,
input[type="text"],
input[type="number"] {
  font: inherit;
  background: rgba(0, 0, 0, 0.25);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.65rem 0.8rem;
  width: 100%;
  transition: border-color var(--transition), box-shadow var(--transition);
}

textarea {
  resize: vertical;
  min-height: 100px;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.95rem;
}

textarea:focus,
input[type="text"]:focus,
input[type="number"]:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(124, 92, 255, 0.15);
}

.ghost-button {
  font: inherit;
  background: var(--color-surface-strong);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.5rem 0.85rem;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  white-space: nowrap;
  font-weight: 500;
}

.ghost-button:hover {
  background: rgba(124, 92, 255, 0.15);
  border-color: rgba(124, 92, 255, 0.4);
  color: var(--color-accent-strong);
}

.distinct-row[hidden] {
  display: none;
}

.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
  user-select: none;
  font-size: 0.95rem;
  color: var(--color-text);
}

.checkbox-label input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 1.15rem;
  height: 1.15rem;
  border: 1px solid var(--color-border);
  background: rgba(0, 0, 0, 0.25);
  border-radius: 5px;
  cursor: pointer;
  position: relative;
  transition: background var(--transition), border-color var(--transition);
  flex: 0 0 auto;
}

.checkbox-label input[type="checkbox"]:checked {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.checkbox-label input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 1px;
  width: 4px;
  height: 8px;
  border: solid #ffffff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.checkbox-label input[type="checkbox"]:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(124, 92, 255, 0.25);
}

.share-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.copy-button {
  flex: 0 0 auto;
}

.share-status {
  color: var(--color-accent-strong);
  font-size: 0.9rem;
  min-height: 1.2em;
}

@media (max-width: 480px) {
  header {
    padding: 2.5rem 1rem 0.5rem;
  }
  header h1 {
    font-size: 1.75rem;
  }
  main {
    padding: 0.5rem 1rem 3rem;
    gap: 1.5rem;
  }
  .picker-stage {
    padding: 1.5rem 1rem;
  }
  .controls {
    padding: 1.25rem;
  }
  .reel {
    width: clamp(110px, 40vw, 160px);
  }
}