/* ===== Daily Hue design language ===== */
:root {
  color-scheme: light;
  --ink: #1d2440;
  --muted: #8b93b2;
  --accent: #6366f1;
  --accent-2: #22d3ee;
  --card: #ffffff;
  --bg: #f4f6fb;
  --border: #e7e9f4;
  --pill-bg: #f3f4fb;
  --radius: 28px;
  --green: #34d399;
}

/* ===== Dark theme ===== */
[data-theme="dark"] {
  color-scheme: dark;
  --ink: #eef0ff;
  --muted: #a3aac8;
  --accent: #7c7fff;
  --accent-2: #4fd8f5;
  --card: #23263b;
  --bg: #141627;
  --border: #333858;
  --pill-bg: #2b2f4a;
  --green: #34d399;
}

[data-theme="dark"] body {
  background:
    radial-gradient(1100px 520px at 12% -8%, #232a52 0%, transparent 60%),
    radial-gradient(900px 480px at 108% 12%, #12333f 0%, transparent 55%),
    radial-gradient(700px 500px at 50% 115%, #2c2345 0%, transparent 55%),
    linear-gradient(180deg, #1a1d31, var(--bg));
}

[data-theme="dark"] .card { box-shadow: 0 24px 70px rgba(0, 0, 0, 0.4), 0 2px 8px rgba(0, 0, 0, 0.25); }
[data-theme="dark"] .icon-btn { background: #1b1f36; }
[data-theme="dark"] .shelf { background: linear-gradient(180deg, #1b1f36, var(--pill-bg)); }
[data-theme="dark"] .soda-slot { background: #1b1f36; }
[data-theme="dark"] .diff-btn { background: var(--pill-bg); }
[data-theme="dark"] .diff-btn:hover { background: #2b2f4a; }
[data-theme="dark"] .btn-ghost:hover { background: #2b2f4a; }
[data-theme="dark"] .overlay { background: rgba(20, 22, 39, 0.85); }

* { margin: 0; padding: 0; box-sizing: border-box; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
body {
  font-family: "Sora", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--ink);
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px 14px;
  background:
    radial-gradient(1100px 520px at 12% -8%, #eef2ff 0%, transparent 60%),
    radial-gradient(900px 480px at 108% 12%, #ecfeff 0%, transparent 55%),
    radial-gradient(700px 500px at 50% 115%, #fdf4ff 0%, transparent 55%),
    linear-gradient(180deg, #fafbff, var(--bg));
}

.card {
  width: 100%;
  max-width: 640px;
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px 24px 20px;
  box-shadow: 0 24px 70px rgba(58, 68, 130, 0.14), 0 2px 8px rgba(58, 68, 130, 0.06);
}

header { display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: baseline; gap: 10px; }
.brand h1 { font-size: 21px; font-weight: 800; letter-spacing: -0.02em; }
.brand .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: inline-block;
}
.sub { color: var(--muted); font-size: 12.5px; margin: 2px 0 16px; }

.actions { display: flex; gap: 8px; }
.icon-btn {
  width: 36px; height: 36px; border-radius: 12px; border: 1px solid var(--border);
  background: #fafbff; color: var(--muted); cursor: pointer; font-size: 16px;
  display: grid; place-items: center; transition: all .18s ease;
}
.icon-btn:hover { color: var(--ink); border-color: #cdd2ea; transform: translateY(-1px); }

.stats { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.pill {
  font-size: 12.5px; font-weight: 600; color: var(--ink);
  background: var(--pill-bg); border: 1px solid var(--border);
  padding: 7px 12px; border-radius: 999px;
}
.pill b { font-weight: 800; }

.difficulty { display: flex; gap: 8px; margin-bottom: 16px; flex-wrap: wrap; }
.diff-btn {
  font-family: inherit; font-size: 12.5px; font-weight: 700;
  background: var(--pill-bg); border: 1px solid var(--border);
  color: var(--muted); border-radius: 999px; padding: 7px 14px; cursor: pointer;
  transition: all .18s ease;
}
.diff-btn:hover { color: var(--ink); transform: translateY(-1px); }
.diff-btn.active {
  background: var(--accent); border-color: var(--accent); color: #fff;
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.35);
}

.shelf {
  display: flex; gap: 10px; justify-content: center; align-items: flex-end;
  padding: 20px 16px 26px; margin-bottom: 14px; position: relative;
  background: linear-gradient(180deg, #fafbff, var(--pill-bg));
  border: 1px solid var(--border); border-radius: 22px;
}
.shelf::after {
  content: "";
  position: absolute; left: 12px; right: 12px; bottom: 10px; height: 4px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--ink) 6%, transparent), color-mix(in srgb, var(--ink) 14%, transparent));
  border-radius: 2px;
}

.soda-slot {
  flex: 0 0 auto;
  width: clamp(44px, 8.2vw, 60px);
  aspect-ratio: 3 / 4.6;
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 6px 5px 8px;
  cursor: pointer;
  font-family: inherit;
  position: relative;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.soda-slot .can {
  display: block; width: 100%; height: 100%;
  border-radius: 9px 9px 11px 11px;
  background: var(--brand, var(--accent));
  position: relative; overflow: hidden;
}
.soda-slot .lid {
  position: absolute; top: 0; left: 0; right: 0; height: 18%;
  background: linear-gradient(180deg, rgba(255, 255, 255, .85), rgba(255, 255, 255, .4));
  border-radius: 9px 9px 3px 3px;
}
.soda-slot .shine {
  position: absolute; top: 12%; bottom: 12%; left: 9%;
  width: 16%; border-radius: 999px;
  background: linear-gradient(180deg, rgba(255, 255, 255, .5), rgba(255, 255, 255, .08));
}
.soda-slot .label {
  position: absolute; left: 8%; right: 8%; top: 34%;
  height: 34%; border-radius: 5px;
  background: rgba(255, 255, 255, .92);
  color: var(--ink);
  font-size: 8.5px; font-weight: 800; line-height: 1.1;
  display: grid; place-items: center; text-align: center;
  letter-spacing: 0.01em; padding: 2px;
}
.soda-slot .base {
  position: absolute; bottom: 0; left: 0; right: 0; height: 10%;
  background: rgba(0, 0, 0, .14);
  border-radius: 0 0 11px 11px;
}
.soda-slot:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 6px 16px rgba(30, 36, 80, 0.14);
}
.soda-slot:active { transform: scale(0.95); }
.soda-slot.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 30%, transparent), 0 8px 18px rgba(99, 102, 241, 0.22);
  transform: translateY(-3px) scale(1.03);
  animation: picked-pulse 1.2s ease-in-out infinite;
}
.soda-slot.selected::after {
  content: "SELECTED";
  position: absolute; top: -15px; left: 50%; transform: translateX(-50%);
  background: var(--accent); color: #fff;
  font-size: 7px; font-weight: 800; letter-spacing: 0.08em;
  padding: 2px 7px; border-radius: 999px; white-space: nowrap;
  box-shadow: 0 3px 8px rgba(30, 36, 80, 0.25);
  animation: picked-pop 0.25s ease;
}
@keyframes picked-pulse {
  0%, 100% { box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 30%, transparent), 0 8px 18px rgba(99, 102, 241, 0.22); }
  50% { box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent) 18%, transparent), 0 8px 22px rgba(99, 102, 241, 0.32); }
}
@keyframes picked-pop {
  from { transform: translateX(-50%) scale(0.6); opacity: 0; }
  to { transform: translateX(-50%) scale(1); opacity: 1; }
}
.soda-slot.dragging { opacity: 0.5; }

.shelf-hint {
  text-align: center;
  font-size: 12px; font-weight: 600;
  color: var(--muted);
  margin: -6px 0 16px;
}

.mystery-shelf { margin-bottom: 16px; }
.mystery-cup {
  flex: 0 0 auto;
  width: clamp(44px, 8.2vw, 60px);
  aspect-ratio: 3 / 4.6;
  perspective: 320px;
  cursor: default;
}
.mystery-cup .inner {
  position: relative; width: 100%; height: 100%;
  transform-style: preserve-3d;
  transition: transform .7s cubic-bezier(.2,.9,.3,1.4);
}
.mystery-cup.revealed .inner { transform: rotateX(180deg); }
.mystery-cup .face {
  position: absolute; inset: 0;
  backface-visibility: hidden; -webkit-backface-visibility: hidden;
  border-radius: 12px;
  display: grid; place-items: center;
  border: 2px solid var(--border);
}
.mystery-cup .front {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-size: 18px; font-weight: 800;
  box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.08);
}
.mystery-cup .back {
  transform: rotateX(180deg);
  background: var(--brand, var(--accent));
  color: #fff; font-size: 9px; font-weight: 800;
  padding: 3px; text-align: center;
}

.feedback {
  font-size: 14px; font-weight: 600; color: var(--ink);
  background: var(--pill-bg); border: 1px solid var(--border);
  border-radius: 14px; padding: 10px 14px; margin-bottom: 14px;
  text-align: center; min-height: 42px;
}
.feedback.good {
  background: color-mix(in srgb, var(--green) 14%, var(--pill-bg));
  border-color: color-mix(in srgb, var(--green) 40%, var(--border));
}
.feedback.warn {
  background: color-mix(in srgb, #fbbf24 12%, var(--pill-bg));
  border-color: color-mix(in srgb, #fbbf24 40%, var(--border));
}

.controls { display: flex; gap: 10px; margin-bottom: 18px; flex-wrap: wrap; }
.btn {
  font-family: inherit; font-size: 14px; font-weight: 700;
  border: none; border-radius: 14px; padding: 12px 20px; cursor: pointer;
  transition: all .18s ease;
}
.btn-primary {
  background: var(--accent); color: #fff;
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(99, 102, 241, 0.42); }
.btn-primary:active { transform: translateY(0); }
.btn-ghost {
  background: var(--pill-bg); color: var(--ink); border: 1px solid var(--border);
}
.btn-ghost:hover { background: color-mix(in srgb, var(--pill-bg) 70%, var(--accent) 10%); transform: translateY(-2px); }

.history-panel { margin-bottom: 8px; }
.history-panel h2 {
  font-size: 13px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 8px;
}
.history-list {
  list-style: none; max-height: 190px; overflow-y: auto;
  display: flex; flex-direction: column; gap: 8px;
}
.history-item {
  background: var(--pill-bg); border: 1px solid var(--border);
  border-radius: 12px; padding: 9px 12px;
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
}
.history-item p { font-size: 12px; color: var(--ink); line-height: 1.35; overflow-wrap: anywhere; }
.history-item p strong { font-weight: 800; }
.history-item .score {
  flex: none; font-size: 11px; font-weight: 800; white-space: nowrap;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent); border-radius: 999px; padding: 4px 9px;
}
.history-item .score.good {
  background: color-mix(in srgb, var(--green) 16%, transparent);
  color: color-mix(in srgb, var(--green) 70%, var(--ink));
}
.history-empty { font-size: 12px; color: var(--muted); font-style: italic; padding: 6px 2px; }

.overlay {
  position: fixed; inset: 0; z-index: 200;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 10px; text-align: center;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(10px);
  padding: 24px;
}
.overlay.hidden { display: none; }
.overlay .emoji { font-size: 52px; animation: bounce .6s ease both; }
.overlay h2 { font-size: 26px; font-weight: 800; letter-spacing: -0.02em; }
.overlay p { color: var(--muted); font-size: 14px; font-weight: 600; }
.btn-row { display: flex; gap: 10px; margin-top: 6px; flex-wrap: wrap; justify-content: center; }

footer { display: flex; justify-content: center; padding-top: 12px; border-top: 1px solid var(--border); margin-top: 4px; }
.link {
  background: none; border: none; font-family: inherit; cursor: pointer;
  color: var(--muted); font-size: 12.5px; font-weight: 600;
  text-decoration: none; transition: color .18s ease;
}
.link:hover { color: var(--accent); }

@keyframes bounce { 0% { transform: scale(0); } 60% { transform: scale(1.25); } 100% { transform: scale(1); } }

#confetti { position: fixed; inset: 0; pointer-events: none; z-index: 300; }

@media (max-width: 460px) {
  .card { padding: 20px 16px; border-radius: 22px; }
  .shelf { gap: 7px; padding: 16px 10px 22px; }
  .soda-slot, .mystery-cup { width: clamp(38px, 11vw, 52px); }
  .soda-slot .label { font-size: 7px; }
  .stats { gap: 8px; }
  .controls { flex-direction: column; }
  .btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .mystery-cup.revealed .inner { transform: rotateX(180deg); }
}