:root {
  --fg: #f2f2f2;
  --muted: #9a9a9a;
  --accent: #ff4d6d;
  --panel: rgba(18, 18, 20, 0.94);
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: #000;
  color: var(--fg);
  font: 15px/1.4 system-ui, -apple-system, "Segoe UI", sans-serif;
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
}

a { color: inherit; }

button, input {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  padding: 0.35em 0.9em;
}

[hidden] { display: none !important; }

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

/* Header and panels ------------------------------------------------------ */

#bar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1rem;
  padding-top: max(0.6rem, env(safe-area-inset-top));
  background: linear-gradient(#000c, #0000);
}

.logo { font-weight: 600; margin-right: auto; }
.logo b { color: var(--accent); }
#stats { color: var(--muted); font-size: 0.8rem; }
#help-btn { width: 2.2em; padding: 0.35em 0; }
#logout-btn { max-width: 14rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#filters-btn.active::after {
  content: "";
  display: inline-block;
  width: 0.45em;
  height: 0.45em;
  margin-left: 0.4em;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: middle;
}
#bar button[aria-expanded="true"] { background: rgba(255, 255, 255, 0.22); }

.panel {
  position: fixed;
  z-index: 11;
  top: calc(3rem + env(safe-area-inset-top));
  right: 1rem;
  background: var(--panel);
  border: 1px solid #333;
  border-radius: 12px;
  padding: 0.8rem 1rem;
  box-shadow: 0 16px 40px #000a;
}

#filters { display: flex; gap: 0.8rem; align-items: center; flex-wrap: wrap; }
#filters input[type=number] {
  width: 4.5em;
  background: #222;
  border: 1px solid #444;
  border-radius: 6px;
  padding: 0.2em 0.4em;
}

#likes { width: min(26rem, calc(100vw - 2rem)); max-height: 70vh; overflow: auto; }
#likes h2 { margin: 0 0 0.5rem; font-size: 1rem; }
#likes ol { margin: 0; padding: 0; list-style: none; }
#likes li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.35rem 0;
  border-bottom: 1px solid #ffffff10;
}
#likes li:last-child { border-bottom: none; }
#likes li .meta { min-width: 0; flex: 1; }
#likes li .meta a { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; text-decoration: none; }
#likes li .meta a:hover { text-decoration: underline; }
#likes li .meta span { color: var(--muted); font-size: 0.8rem; }
#likes li .play-now {
  flex: none;
  width: 2rem;
  height: 2rem;
  padding: 0;
  display: grid;
  place-items: center;
}
#likes li .play-now svg { width: 0.9rem; height: 0.9rem; }

/* Feed ------------------------------------------------------------------- */

#feed {
  height: 100dvh;
  overflow-y: scroll;
  scroll-snap-type: y mandatory;
  scrollbar-width: none;
}
#feed::-webkit-scrollbar { display: none; }

.card {
  position: relative;
  height: 100dvh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
  cursor: pointer;
}

.bg {
  position: absolute;
  inset: -40px;
  background: #111 center / cover no-repeat;
  filter: blur(40px) brightness(0.45) saturate(1.3);
}

.content {
  position: relative;
  width: min(34rem, calc(100vw - 5.5rem));
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.5rem;
}

.art {
  position: relative;
  width: min(16rem, 42vh, 70vw);
  aspect-ratio: 1;
  border-radius: 14px;
  background: #222 center / cover no-repeat;
  box-shadow: 0 20px 60px #000a;
  display: grid;
  place-items: center;
  margin-bottom: 0.6rem;
  transition: transform 0.25s ease, filter 0.25s ease;
}
.initial { font-size: 4rem; font-weight: 700; color: #fff6; }

.card.paused .art { transform: scale(0.96); filter: brightness(0.7); }
.paused-badge {
  position: absolute;
  inset: 0;
  margin: auto;
  width: 4.5rem;
  height: 4.5rem;
  border-radius: 50%;
  background: #000a;
  display: grid;
  place-items: center;
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
}
.paused-badge svg { width: 2rem; height: 2rem; margin-left: 0.2rem; }
.card.paused .paused-badge { opacity: 1; }

.spinner {
  position: absolute;
  inset: 0;
  margin: auto;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  border: 3px solid #ffffff33;
  border-top-color: #fff;
  opacity: 0;
  pointer-events: none;
  animation: spin 0.8s linear infinite;
}
.card.buffering .spinner { opacity: 1; }
.card.buffering .paused-badge { opacity: 0; }
@keyframes spin { to { transform: rotate(360deg); } }

.title { font-size: 1.25rem; margin: 0; overflow-wrap: anywhere; }
.artist { color: var(--muted); text-decoration: none; }
.artist:hover { text-decoration: underline; }

.chips { display: flex; gap: 0.4rem; flex-wrap: wrap; justify-content: center; }
.chips span {
  font-size: 0.75rem;
  padding: 0.1em 0.6em;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
}
.chips .free { background: #1f7a4d; }
.chips .preview { background: #6a4b16; }

.desc {
  margin: 0;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  overflow: hidden;
  overflow-wrap: anywhere;
  color: var(--muted);
  font-size: 0.85rem;
}

.wave-wrap { position: relative; width: 100%; margin-top: 0.6rem; }
.wave { display: block; width: 100%; height: 64px; cursor: pointer; touch-action: none; }
.wave-tip {
  position: absolute;
  bottom: calc(100% + 4px);
  transform: translateX(-50%);
  padding: 0.1em 0.45em;
  border-radius: 6px;
  background: #000c;
  font-size: 0.75rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.1s;
}
.wave-wrap.hover .wave-tip { opacity: 1; }
.time { width: 100%; display: flex; justify-content: space-between; color: var(--muted); font-size: 0.75rem; }
.counts { color: var(--muted); font-size: 0.8rem; }

.actions {
  position: absolute;
  right: 0.8rem;
  bottom: 18vh;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.actions > * {
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  border: none;
  text-decoration: none;
  padding: 0;
  transition: background 0.15s, transform 0.15s;
}
.actions > *:hover { background: rgba(255, 255, 255, 0.2); }
.actions > *:active { transform: scale(0.9); }
.actions svg { width: 1.3rem; height: 1.3rem; }
.actions .like.on { color: var(--accent); background: rgba(255, 77, 109, 0.2); }
.actions .like.pop svg { animation: pop 0.35s ease; }
@keyframes pop { 50% { transform: scale(1.4); } }

/* Feedback overlays ------------------------------------------------------ */

.flash {
  position: absolute;
  z-index: 2;
  top: 50%;
  left: 50%;
  width: 5.5rem;
  height: 5.5rem;
  margin: -2.75rem 0 0 -2.75rem;
  border-radius: 50%;
  background: #000a;
  display: grid;
  place-items: center;
  pointer-events: none;
  animation: flash 0.6s ease forwards;
}
.flash svg { width: 2.4rem; height: 2.4rem; }
@keyframes flash {
  from { opacity: 1; transform: scale(0.7); }
  to { opacity: 0; transform: scale(1.3); }
}

.burst {
  position: absolute;
  z-index: 3;
  width: 6rem;
  height: 6rem;
  margin: -3rem 0 0 -3rem;
  color: var(--accent);
  pointer-events: none;
  filter: drop-shadow(0 6px 20px #ff4d6d88);
  animation: burst 0.8s cubic-bezier(.2, .9, .3, 1.3) forwards;
}
@keyframes burst {
  0% { opacity: 0; transform: scale(0.3) rotate(var(--tilt)); }
  25% { opacity: 1; transform: scale(1.15) rotate(var(--tilt)); }
  60% { opacity: 1; transform: scale(1) rotate(var(--tilt)); }
  100% { opacity: 0; transform: translateY(-3rem) scale(0.9) rotate(var(--tilt)); }
}

#toast {
  position: fixed;
  z-index: 40;
  left: 50%;
  bottom: max(2rem, env(safe-area-inset-bottom));
  transform: translate(-50%, 1rem);
  padding: 0.6em 1.1em;
  border-radius: 999px;
  background: #222e;
  border: 1px solid #ffffff22;
  font-size: 0.9rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  white-space: nowrap;
}
#toast.show { opacity: 1; transform: translate(-50%, 0); }

.status {
  height: 100dvh;
  display: grid;
  place-items: center;
  color: var(--muted);
  scroll-snap-align: start;
  padding: 1rem;
  text-align: center;
}

#start {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  background: #000b;
  cursor: pointer;
}
#start button { font-size: 1.3rem; padding: 0.7em 1.6em; background: var(--accent); border: none; color: #fff; }

#help {
  position: fixed;
  inset: 0;
  z-index: 25;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: #000b;
  animation: fade 0.2s ease;
}
@keyframes fade { from { opacity: 0; } }
.help-box {
  width: min(22rem, 100%);
  background: var(--panel);
  border: 1px solid #333;
  border-radius: 16px;
  padding: 1.2rem 1.4rem;
}
.help-box h2 { margin: 0 0 0.8rem; font-size: 1.1rem; }
.help-box dl { display: grid; grid-template-columns: auto 1fr; gap: 0.45rem 1rem; margin: 0; }
.help-box dt { font-family: ui-monospace, monospace; font-size: 0.85rem; color: var(--accent); }
.help-box dd { margin: 0; }
.help-box p { color: var(--muted); font-size: 0.85rem; margin: 1rem 0; }
.help-box button { width: 100%; background: var(--accent); border: none; color: #fff; padding: 0.6em; font-weight: 600; }
@media (hover: hover) and (pointer: fine) { .touch-only { display: none !important; } }
@media not ((hover: hover) and (pointer: fine)) { .pointer-only { display: none !important; } }

/* Sign-in ---------------------------------------------------------------- */

#login {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: 1rem;
  background:
    radial-gradient(60rem 40rem at 20% 10%, #ff4d6d33, transparent 60%),
    radial-gradient(50rem 40rem at 90% 90%, #4d6dff2e, transparent 60%),
    #050507;
}

.login-box {
  width: min(24rem, 100%);
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.login-box h1 { margin: 0; font-size: 2.4rem; }
.login-box h1 b { color: var(--accent); }
.tagline { margin: 0 0 0.8rem; color: var(--muted); }
.login-box form { display: flex; flex-direction: column; gap: 0.6rem; }
.login-box label { color: var(--muted); font-size: 0.9rem; }
.login-box input {
  padding: 0.7em 0.9em;
  border-radius: 10px;
  border: 1px solid #333;
  background: #111;
}
#code { font-family: ui-monospace, monospace; font-size: 1.4rem; letter-spacing: 0.5em; text-align: center; }
.login-box button[type=submit] { background: var(--accent); border: none; color: #fff; padding: 0.7em; font-weight: 600; }
.login-box button[disabled] { opacity: 0.6; cursor: wait; }
.login-links { display: flex; justify-content: space-between; }
.link { background: none; border: none; padding: 0; color: var(--muted); text-decoration: underline; font-size: 0.85rem; }
#login-error { margin: 0; min-height: 1.2em; color: var(--accent); font-size: 0.9rem; }
.fineprint { margin: 0; color: #666; font-size: 0.75rem; }

/* Phones ----------------------------------------------------------------- */

@media (max-width: 640px) {
  #stats { display: none; }
  #bar { gap: 0.4rem; padding-left: 0.7rem; padding-right: 0.7rem; }
  #bar button { padding: 0.3em 0.7em; font-size: 0.85rem; }
  #help-btn { display: none; }
  #logout-btn { max-width: 6.5rem; }
  .panel { left: 0.7rem; right: 0.7rem; }
  #likes { width: auto; }
  .content { width: calc(100vw - 2rem); margin-bottom: 4.5rem; }
  .actions {
    right: auto;
    left: 50%;
    bottom: max(1.2rem, env(safe-area-inset-bottom));
    transform: translateX(-50%);
    flex-direction: row;
    gap: 0.9rem;
  }
}

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