:root {
  --bg: #0b0b12;
  --panel: rgba(26, 26, 40, 0.72);
  --panel-solid: #1a1a28;
  --panel-2: #232338;
  --border: #2e2e4a;
  --text: #f2f2f8;
  --muted: #9c9cb4;
  --accent: #a238ff;      /* Deezer purple */
  --accent-2: #6d1fd1;
  --accent-glow: rgba(162, 56, 255, 0.35);
  --pink: #ff5470;
  --gold: #ffd166;
  --silver: #c9d1e0;
  --bronze: #e0a370;
  --danger: #ff5470;
  --radius: 16px;
}

* { box-sizing: border-box; }

html { scrollbar-color: #3a3a58 transparent; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, sans-serif;
  line-height: 1.55;
  overflow-x: hidden;
}

.hidden { display: none !important; }

/* ---------- animated background ---------- */
.bg-blobs {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}
.bg-blobs span {
  position: absolute;
  width: 55vmax;
  height: 55vmax;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.22;
  animation: blob-drift 26s ease-in-out infinite alternate;
}
.bg-blobs span:nth-child(1) { background: #5b1fa8; top: -25vmax; left: -12vmax; }
.bg-blobs span:nth-child(2) { background: #a0225c; bottom: -28vmax; right: -15vmax; animation-delay: -9s; animation-duration: 32s; }
.bg-blobs span:nth-child(3) { background: #1f3aa8; top: 30%; left: 55%; width: 34vmax; height: 34vmax; opacity: 0.14; animation-delay: -18s; animation-duration: 38s; }

@keyframes blob-drift {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(9vmax, -6vmax) scale(1.18); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ---------- layout ---------- */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 30px;
}
.logo { display: flex; align-items: center; gap: 12px; }
.logo-badge {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  font-size: 21px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 4px 18px var(--accent-glow);
}
.topbar h1 { font-size: 19px; margin: 0; letter-spacing: 0.4px; font-weight: 700; }

main {
  display: flex;
  justify-content: center;
  padding: 8px 20px 70px;
}

.screen {
  width: 100%;
  max-width: 660px;
  animation: screen-in 0.45s cubic-bezier(0.22, 1, 0.36, 1) both;
}
.screen:has(.panel.wide) { max-width: 840px; }
#screen-duel { max-width: 920px; }

@keyframes screen-in {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

.panel {
  background: var(--panel);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}
.panel h2 { margin-top: 0; }

.muted { color: var(--muted); }
.small { font-size: 13px; }
.error { color: var(--danger); font-weight: 600; }

a { color: var(--accent); }
a:hover { filter: brightness(1.25); }

kbd {
  display: inline-block;
  min-width: 20px;
  padding: 1px 6px;
  border-radius: 6px;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  background: var(--panel-2);
  font-family: inherit;
  font-size: 12px;
  text-align: center;
}

/* ---------- hero & steps (setup) ---------- */
.hero { text-align: center; margin: 18px 0 26px; }
.hero-title {
  font-size: clamp(28px, 5vw, 42px);
  line-height: 1.15;
  margin: 0 0 12px;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(100deg, #fff 20%, #c99aff 55%, var(--accent) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-title em { font-style: normal; }
.hero-sub { max-width: 520px; margin: 0 auto; }

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 22px;
}
.step {
  background: var(--panel);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  animation: screen-in 0.45s cubic-bezier(0.22, 1, 0.36, 1) both;
}
.step:nth-child(2) { animation-delay: 0.08s; }
.step:nth-child(3) { animation-delay: 0.16s; }
.step .step-num {
  display: inline-grid;
  place-items: center;
  width: 24px;
  height: 24px;
  margin-right: 8px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}
.step p { margin: 6px 0 0; font-size: 12.5px; color: var(--muted); }

@media (max-width: 640px) {
  .steps { grid-template-columns: 1fr; }
}

/* ---------- buttons ---------- */
.btn {
  font: inherit;
  border: none;
  border-radius: 11px;
  padding: 10px 18px;
  cursor: pointer;
  color: var(--text);
  transition: transform 0.12s ease, box-shadow 0.2s ease, background 0.15s ease, opacity 0.15s, filter 0.15s;
}
.btn:active { transform: scale(0.96); }
.btn:disabled { opacity: 0.4; cursor: default; }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* instant, clean taps on touch screens */
.btn, .stepper-btn, .contender, .artist-list label, a {
  -webkit-tap-highlight-color: transparent;
}
.btn, .stepper-btn, .contender { touch-action: manipulation; }

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  font-weight: 700;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-ghost {
  background: var(--panel-2);
  border: 1px solid var(--border);
}

/* hover effects only on devices that actually hover — they stick after taps */
@media (hover: hover) {
  .btn-primary:hover:not(:disabled) { filter: brightness(1.15); transform: translateY(-1px); box-shadow: 0 8px 28px var(--accent-glow); }
  .btn-ghost:hover:not(:disabled) { background: #2c2c48; border-color: #44446a; }
}

.btn.big { padding: 14px 30px; font-size: 17px; }

/* ---------- forms & progress ---------- */
.fetch-form { display: flex; gap: 10px; margin: 4px 0 14px; }
.fetch-form input,
.select-toolbar input,
#results-filter {
  flex: 1;
  font: inherit;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 11px;
  color: var(--text);
  padding: 10px 14px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.fetch-form input:focus,
.select-toolbar input:focus,
#results-filter:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.progress {
  position: relative;
  height: 10px;
  background: var(--panel-2);
  border-radius: 99px;
  overflow: hidden;
  margin: 14px 0 6px;
}
.progress.slim { height: 7px; max-width: 440px; margin: 12px auto 0; }
.progress-fill {
  position: relative;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--pink));
  border-radius: 99px;
  transition: width 0.35s ease;
  overflow: hidden;
}
.progress-fill::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, transparent 30%, rgba(255, 255, 255, 0.35) 50%, transparent 70%);
  transform: translateX(-100%);
  animation: shimmer 1.8s ease-in-out infinite;
}
@keyframes shimmer { to { transform: translateX(100%); } }

/* ---------- selection ---------- */
.select-toolbar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 14px; }
.select-toolbar input { min-width: 180px; }

.stepper {
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 11px;
  padding: 3px;
  user-select: none;
}
.stepper-btn {
  width: 34px;
  height: 34px;
  border: none;
  border-radius: 9px;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 19px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition: background 0.12s, transform 0.08s;
}
@media (hover: hover) {
  .stepper-btn:hover { background: #2c2c48; }
}
.stepper-btn:active { transform: scale(0.88); background: #2c2c48; }
.stepper-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.stepper-value {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 78px;
  line-height: 1.1;
  padding: 0 6px;
}
#min-value {
  display: inline-block;
  font-weight: 800;
  font-size: 15px;
}
#min-value.bump { animation: bump 0.2s ease; }
@keyframes bump {
  50% { transform: scale(1.45); color: var(--accent); }
}
.stepper-label {
  font-size: 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.artist-list {
  list-style: none;
  margin: 0;
  padding: 4px;
  max-height: 46vh;
  overflow-y: auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(235px, 1fr));
  gap: 8px;
}
.artist-list label {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--panel-2);
  border: 1px solid transparent;
  border-radius: 11px;
  padding: 6px 10px;
  cursor: pointer;
  user-select: none;
  transition: border-color 0.15s, transform 0.12s, background 0.15s;
}
@media (hover: hover) {
  .artist-list label:hover { border-color: var(--accent); transform: translateY(-1px); }
}
.artist-list label:has(input:not(:checked)) { opacity: 0.45; }
.artist-list input[type="checkbox"] { accent-color: var(--accent); }
.artist-list img {
  width: 36px; height: 36px;
  border-radius: 9px;
  object-fit: cover;
  background: #33334d;
  flex-shrink: 0;
}
.artist-list .a-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.artist-list .a-count { margin-left: auto; color: var(--muted); font-size: 12px; flex-shrink: 0; }

.select-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-top: 18px;
}

/* ---------- duel ---------- */
.duel-header { text-align: center; margin-bottom: 28px; }
.duel-question {
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 800;
  letter-spacing: -0.3px;
  margin: 4px 0 8px;
}
#duel-progress-text { margin: 0; }

.duel-arena {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 24px;
}

.contender {
  flex: 1;
  max-width: 350px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 20px;
  background: var(--panel);
  backdrop-filter: blur(14px);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--text);
  font: inherit;
  transition: transform 0.15s ease, border-color 0.2s ease, box-shadow 0.2s;
}
.contender { user-select: none; -webkit-user-select: none; }
@media (hover: hover) {
  .contender:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 16px 40px var(--accent-glow);
  }
}
.contender:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 16px 40px var(--accent-glow);
  outline: none;
}
.contender:active { border-color: var(--accent); }
.contender .img-wrap {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 12px;
  overflow: hidden;
  background: #33334d;
}
.contender img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}
@media (hover: hover) {
  .contender:hover img { transform: scale(1.06); }
}
.contender-name { font-size: 22px; font-weight: 800; text-align: center; line-height: 1.2; }
.contender-meta { color: var(--muted); font-size: 13px; min-height: 1.2em; }

/* pick animations — fast and punchy */
.contender { position: relative; }
.contender.winner {
  border-color: var(--gold);
  box-shadow: 0 0 0 4px rgba(255, 209, 102, 0.5), 0 0 60px rgba(255, 209, 102, 0.4);
  animation: winner-punch 0.2s cubic-bezier(0.3, 1.6, 0.5, 1) both;
  z-index: 2;
  transition: none;
}
@keyframes winner-punch {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.09); }
  100% { transform: scale(1.04); }
}
.contender.winner::after {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: inherit;
  background: radial-gradient(circle at 50% 45%, rgba(255, 255, 255, 0.95), rgba(255, 209, 102, 0.4) 55%, transparent 75%);
  animation: flash-out 0.28s ease-out both;
  pointer-events: none;
}
@keyframes flash-out {
  0%   { opacity: 1; transform: scale(0.85); }
  100% { opacity: 0; transform: scale(1.25); }
}
.contender.loser {
  animation: loser-drop 0.18s ease-in both;
  transition: none;
}
@keyframes loser-drop {
  to { opacity: 0.1; transform: scale(0.9) translateY(14px) rotate(-1.5deg); filter: grayscale(1) brightness(0.6); }
}
.contender.swap-in { animation: swap-in 0.22s cubic-bezier(0.2, 1.2, 0.4, 1) both; }
@keyframes swap-in {
  from { opacity: 0; transform: translateY(12px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.vs {
  align-self: center;
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  flex-shrink: 0;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--pink));
  box-shadow: 0 0 24px var(--accent-glow);
  font-size: 17px;
  font-weight: 900;
  letter-spacing: 1px;
  animation: vs-pulse 2.2s ease-in-out infinite;
}
@keyframes vs-pulse {
  0%, 100% { transform: scale(1); box-shadow: 0 0 20px var(--accent-glow); }
  50%      { transform: scale(1.1); box-shadow: 0 0 34px var(--accent-glow); }
}

.duel-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-top: 28px;
}
.duel-actions { display: flex; gap: 10px; }
.kbd-hints { margin: 0; }

@media (max-width: 680px) {
  .duel-header { margin-bottom: 14px; }
  .duel-question { font-size: 20px; }
  .duel-arena { flex-direction: column; align-items: center; gap: 10px; }
  .contender {
    width: 100%;
    max-width: 440px;
    min-height: 118px;
    flex-direction: row;
    text-align: left;
    padding: 12px 14px;
    gap: 12px;
  }
  .contender .img-wrap { width: 92px; flex-shrink: 0; }
  .contender-name { font-size: 18px; text-align: left; }
  .contender > .contender-name { flex: 1; }
  .vs { width: 38px; height: 38px; font-size: 12px; margin: -4px 0; z-index: 1; }
  .duel-footer { margin-top: 16px; }
  .duel-actions { width: 100%; max-width: 440px; }
  .duel-actions .btn { flex: 1; padding: 13px 10px; }
  .kbd-hints { display: none; }
  .contender-meta { display: none; }
}

/* ---------- results ---------- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 6px 0 16px;
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 8px;
  text-align: center;
}
.stat-num {
  font-size: 26px;
  font-weight: 800;
  background: linear-gradient(120deg, #fff, #c99aff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-label { font-size: 12px; color: var(--muted); }

#results-filter { width: 100%; margin-bottom: 10px; }

.ranking-list {
  list-style: none;
  margin: 8px 0 18px;
  padding: 0;
  max-height: 52vh;
  overflow-y: auto;
}
.ranking-list li {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 8px 12px;
  border-radius: 11px;
  animation: swap-in 0.4s cubic-bezier(0.22, 1, 0.36, 1) both;
}
.ranking-list li:nth-child(odd) { background: var(--panel-2); }
.ranking-list li.rank-1 { background: linear-gradient(90deg, rgba(255, 209, 102, 0.14), transparent 70%); border: 1px solid rgba(255, 209, 102, 0.35); }
.ranking-list li.rank-2 { background: linear-gradient(90deg, rgba(201, 209, 224, 0.10), transparent 70%); border: 1px solid rgba(201, 209, 224, 0.25); }
.ranking-list li.rank-3 { background: linear-gradient(90deg, rgba(224, 163, 112, 0.10), transparent 70%); border: 1px solid rgba(224, 163, 112, 0.25); }

.ranking-list .rank {
  width: 46px;
  text-align: center;
  font-weight: 800;
  font-size: 16px;
  color: var(--muted);
  flex-shrink: 0;
}
.ranking-list li:nth-child(-n+3) .rank { font-size: 24px; }
.ranking-list img {
  width: 44px; height: 44px;
  border-radius: 9px;
  object-fit: cover;
  background: #33334d;
  flex-shrink: 0;
}
.ranking-list .r-name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ranking-list .r-albums { margin-left: auto; color: var(--muted); font-size: 12px; flex-shrink: 0; }
.ranking-list .r-link {
  flex-shrink: 0;
  text-decoration: none;
  font-size: 14px;
  color: var(--muted);
  padding: 2px 6px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}
.ranking-list .r-link:hover { color: var(--accent); background: rgba(162, 56, 255, 0.12); }

.results-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

/* ---------- small screens ---------- */
@media (max-width: 640px) {
  .topbar { padding: 12px 16px; }
  main { padding: 4px 12px 48px; }
  .panel { padding: 20px 16px; }

  /* setup: form first, explanation cards after */
  #screen-setup { display: flex; flex-direction: column; }
  #screen-setup .hero { order: 0; margin: 6px 0 16px; }
  #screen-setup .panel { order: 1; }
  #screen-setup .steps { order: 2; margin: 16px 0 0; }
  .fetch-form { flex-direction: column; }
  .fetch-form .btn { padding: 13px; }

  /* selection: full-width start button, roomier list rows */
  .select-toolbar input { min-width: 100%; }
  .stepper { flex: 1; justify-content: space-between; }
  .select-footer { flex-direction: column; align-items: stretch; text-align: center; }
  .artist-list { max-height: 52vh; }
  .artist-list label { padding: 9px 10px; }

  /* results: compact stat tiles in one row, natural page scrolling */
  .stats-row { gap: 8px; }
  .stat { padding: 10px 4px; }
  .stat-num { font-size: 19px; }
  .stat-label { font-size: 10.5px; }
  .ranking-list { max-height: none; }
  .results-actions .btn { flex: 1 1 42%; padding: 12px 10px; }

  /* lighter GPU load while scrolling on phones */
  .bg-blobs span { filter: blur(55px); opacity: 0.18; animation: none; }
}

/* ---------- confetti ---------- */
.confetti {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 50;
}
.confetti i {
  position: absolute;
  top: -24px;
  border-radius: 2px;
  opacity: 0.95;
  animation: confetti-fall linear both;
}
@keyframes confetti-fall {
  to {
    transform: translateY(112vh) translateX(calc(var(--drift, 0) * 140px)) rotate(760deg);
    opacity: 0.7;
  }
}

/* spark burst when a duel is won */
.confetti .spark {
  position: absolute;
  top: auto;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  animation: spark-fly 0.55s cubic-bezier(0.1, 0.8, 0.3, 1) both;
}
@keyframes spark-fly {
  0%   { transform: translate(0, 0) scale(1.2); opacity: 1; }
  100% { transform: translate(var(--dx), var(--dy)) scale(0.1); opacity: 0; }
}

/* ---------- toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 20px);
  background: var(--panel-solid);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 60;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }