/* styles.css
 *
 * Buddha.fm — minimal calm UI layer.
 *
 * The UI should feel like a thin layer over the environment, not an
 * app dashboard. Controls are small, translucent, and stay out of the
 * way during long-duration listening.
 */

:root {
  --ink: 245, 246, 248;
  --ink-soft: 235, 238, 244;
  --ink-dim: 200, 210, 225;
  --shade: 0, 0, 0;
  --accent: 255, 255, 255;
  --radius: 999px;
  --ui-pad: clamp(18px, 2.2vw, 32px);
  --font:
    -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI",
    Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  width: 100%;
  background: #05080f;
  color: rgb(var(--ink));
  font-family: var(--font);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
}

/* Disable text selection on the ambient layer; keep it on labels that need it. */
body {
  user-select: none;
}

/* ---------- Living environment ---------- */

#drift-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
  z-index: 0;
  /* The canvas itself is the background — no further layering needed. */
}

/* Very subtle overall vignette beyond the shader's own, to soften edges on TVs. */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(
    ellipse at center,
    rgba(0, 0, 0, 0) 55%,
    rgba(0, 0, 0, 0.32) 100%
  );
}

/* ---------- UI layer ---------- */

.ui-layer {
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none; /* children re-enable */
  display: block;
}

.ui-layer > * {
  pointer-events: auto;
}

.ui-top-left {
  position: absolute;
  top: var(--ui-pad);
  left: var(--ui-pad);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.ui-top-right {
  position: absolute;
  top: var(--ui-pad);
  right: var(--ui-pad);
  left: auto;
  bottom: auto;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
}

/* ---------- Tier label ---------- */

.tier-label {
  appearance: none;
  background: rgba(var(--shade), 0.22);
  backdrop-filter: blur(12px) saturate(1.1);
  -webkit-backdrop-filter: blur(12px) saturate(1.1);
  color: rgba(var(--ink-soft), 0.85);
  border: 1px solid rgba(var(--ink), 0.12);
  padding: 6px 14px;
  border-radius: var(--radius);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 600ms var(--ease), color 600ms var(--ease),
    border-color 600ms var(--ease), transform 400ms var(--ease);
}
.tier-label:hover {
  background: rgba(var(--shade), 0.32);
  color: rgba(var(--ink), 1);
}
.tier-label[data-tier="core"] {
  border-color: rgba(255, 230, 190, 0.35);
}
.tier-label[data-tier="inner_circle"] {
  border-color: rgba(200, 220, 255, 0.45);
  color: rgba(var(--ink), 0.95);
}

/* Dev tier picker — hidden by default, revealed by tapping the label. */
.tier-picker {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: rgba(var(--shade), 0.4);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-radius: 14px;
  padding: 6px;
  border: 1px solid rgba(var(--ink), 0.08);
}
.tier-picker.visible { display: flex; }
.tier-picker button {
  appearance: none;
  background: transparent;
  border: 0;
  color: rgba(var(--ink-soft), 0.85);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 8px 14px;
  border-radius: 10px;
  cursor: pointer;
  text-align: left;
  transition: background 300ms var(--ease), color 300ms var(--ease);
}
.tier-picker button:hover {
  background: rgba(var(--ink), 0.08);
  color: rgba(var(--ink), 1);
}

/* ---------- State group (Sleep / Calm / Focus) ---------- */

.state-group {
  position: absolute;
  left: 50%;
  bottom: calc(var(--ui-pad) + 6px);
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  padding: 6px;
  background: rgba(var(--shade), 0.28);
  backdrop-filter: blur(14px) saturate(1.1);
  -webkit-backdrop-filter: blur(14px) saturate(1.1);
  border: 1px solid rgba(var(--ink), 0.1);
  border-radius: var(--radius);
}

.state-btn {
  appearance: none;
  background: transparent;
  color: rgba(var(--ink-dim), 0.78);
  border: 0;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
  cursor: pointer;
  transition: background 700ms var(--ease), color 700ms var(--ease);
}
.state-btn:hover { color: rgba(var(--ink), 1); }
.state-btn.active {
  background: rgba(var(--accent), 0.18);
  color: rgba(var(--ink), 1);
  box-shadow: inset 0 0 0 1px rgba(var(--ink), 0.08);
}

/* Larger targets on TV/fullscreen large displays */
@media (min-width: 1600px) {
  .state-btn { padding: 14px 30px; font-size: 15px; }
  .tier-label { padding: 8px 18px; font-size: 13px; }
}
@media (max-width: 500px) {
  .state-btn { padding: 10px 16px; font-size: 12px; letter-spacing: 0.14em; }
  .state-group { gap: 6px; }
}

/* ---------- Upgrade triggers ---------- */

.upgrade-link {
  appearance: none;
  background: rgba(var(--shade), 0.2);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: rgba(var(--ink-dim), 0.85);
  border: 1px solid rgba(var(--ink), 0.1);
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  opacity: 0.78;
  transition: opacity 600ms var(--ease), background 600ms var(--ease),
    color 600ms var(--ease);
}
.upgrade-link:hover {
  opacity: 1;
  color: rgba(var(--ink), 1);
  background: rgba(var(--shade), 0.32);
}
#upgrade-inner {
  border-color: rgba(200, 220, 255, 0.3);
}

/* ---------- Unlock hint (autoplay blocked) ---------- */

.unlock-hint {
  position: absolute;
  left: 50%;
  top: 14%;
  transform: translateX(-50%);
  color: rgba(var(--ink-dim), 0.8);
  font-size: 13px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  white-space: nowrap;
  padding: 10px 18px;
  border-radius: var(--radius);
  background: rgba(var(--shade), 0.25);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 900ms var(--ease);
}
.unlock-hint.visible { opacity: 1; }

/* While we wait for iOS (or any slow network) to actually start the
 * stream, the hint switches to a gentle pulsing "Starting" state so
 * the user knows the tap registered. The hint is hidden for real when
 * the `playing` event fires on the audio element. */
.unlock-hint.loading {
  animation: unlock-hint-pulse 1.8s ease-in-out infinite;
}
.unlock-hint.loading::after {
  content: "…";
  display: inline-block;
  margin-left: 2px;
  animation: unlock-hint-dots 1.4s steps(4, end) infinite;
  width: 1.2em;
  text-align: left;
}
@keyframes unlock-hint-pulse {
  0%, 100% { opacity: 0.55; }
  50%      { opacity: 1;    }
}
@keyframes unlock-hint-dots {
  0%   { content: ""; }
  25%  { content: "."; }
  50%  { content: ".."; }
  75%  { content: "…"; }
  100% { content: "…"; }
}

/* ---------- Confirmation overlay (after subscription) ---------- */

.confirmation-overlay {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  padding: 14px 28px;
  color: rgba(var(--ink), 0.95);
  font-size: 15px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  font-weight: 300;
  background: rgba(var(--shade), 0.28);
  backdrop-filter: blur(16px) saturate(1.1);
  -webkit-backdrop-filter: blur(16px) saturate(1.1);
  border: 1px solid rgba(var(--ink), 0.1);
  border-radius: var(--radius);
  opacity: 0;
  pointer-events: none;
  transition: opacity 1400ms var(--ease), transform 1400ms var(--ease);
}
.confirmation-overlay.visible {
  opacity: 1;
  transform: translate(-50%, -50%) translateY(-4px);
}
.confirmation-overlay.fading {
  opacity: 0;
}

/* ---------- Accessibility niceties ---------- */

button:focus-visible {
  outline: 2px solid rgba(var(--ink), 0.5);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .state-btn, .upgrade-link, .tier-label, .confirmation-overlay {
    transition-duration: 200ms;
  }
}