:root {
  --bg: #000;
  --panel: rgba(18, 20, 24, 0.94);
  --card: #14171c;
  --line: rgba(255, 255, 255, 0.12);
  --text: #f2f4f7;
  --muted: #9aa3ae;
  --accent: #35d0bd;
  --accent-ink: #04211d;
  --danger: #ff8a7a;
  --fit: contain;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
/* visually hidden, still readable by password managers (beats the input[type=text] sizing below) */
input.vh { position: absolute !important; width: 1px !important; height: 1px !important; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0 !important; padding: 0 !important; opacity: 0; pointer-events: none; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
}
html.bg-transparent { --bg: transparent; }
html.bg-white { --bg: #fff; }
body.hud-hidden.playing, body.no-ui { cursor: none; }

/* ---------- stage ---------- */
#stage { position: fixed; inset: 0; overflow: hidden; }
.layer {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.5s ease;
}
body.no-fade .layer { transition: none; }
.layer.visible { opacity: 1; }
.layer > img, .layer > video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: var(--fit);
  background: transparent;
}
body.sharp .layer > img, body.sharp .layer > video {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

/* ---------- start + status screens ---------- */
.screen {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background: radial-gradient(1200px 600px at 20% 0%, #10302c 0%, transparent 60%), #0b0d10;
  overflow-y: auto;
  z-index: 30;
}
html.bg-transparent .screen#status { background: transparent; }
.card {
  width: min(560px, 100%);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 32px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}
h1 { margin: 0 0 8px; font-size: 30px; letter-spacing: -0.01em; }
.lead { margin: 0 0 24px; color: var(--muted); }
label { display: block; }
form label { font-weight: 600; margin-bottom: 8px; }
input[type="text"], input[type="password"], select {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: #0c0e12;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
}
input[type="text"]:focus, input[type="password"]:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
button {
  font: inherit;
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 16px;
  cursor: pointer;
}
button:hover { background: rgba(255, 255, 255, 0.14); }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button.primary {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: transparent;
  font-weight: 700;
}
button.primary:hover { filter: brightness(1.08); }
#startForm button.primary, #loginForm button.primary { width: 100%; margin-top: 16px; padding: 14px; font-size: 17px; }
.hint { color: var(--muted); font-size: 14px; margin: 16px 0 0; }
.error { color: var(--danger); margin: 10px 0 0; }
.row { display: flex; gap: 10px; justify-content: center; margin-top: 18px; flex-wrap: wrap; }

.status-card { text-align: center; }
#statusText { font-size: 18px; margin: 14px 0 0; }
.spinner {
  width: 38px;
  height: 38px;
  margin: 0 auto;
  border-radius: 50%;
  border: 3px solid rgba(255, 255, 255, 0.15);
  border-top-color: var(--accent);
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- HUD ---------- */
.hud {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 10;
  opacity: 1;
  transition: opacity 0.25s ease;
}
body.hud-hidden .hud, body.no-ui .hud { opacity: 0; }
body.hud-hidden .hud *, body.no-ui .hud * { pointer-events: none !important; }
.hud-top, .hud-bottom { position: absolute; left: 0; right: 0; pointer-events: auto; }
.hud-top {
  top: 0;
  padding: max(16px, env(safe-area-inset-top)) 20px 40px;
  background: linear-gradient(rgba(0, 0, 0, 0.6), transparent);
}
.now-name { font-weight: 650; font-size: 17px; text-shadow: 0 1px 3px rgba(0, 0, 0, 0.7); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.now-meta { color: #d0d5db; font-size: 14px; text-shadow: 0 1px 3px rgba(0, 0, 0, 0.7); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hud-bottom {
  bottom: 0;
  padding: 40px 16px max(14px, env(safe-area-inset-bottom));
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.65));
}
.progress { height: 3px; background: rgba(255, 255, 255, 0.18); border-radius: 2px; overflow: hidden; margin: 0 6px 12px; }
#progressBar { height: 100%; width: 0; background: var(--accent); }
.controls { display: flex; align-items: center; gap: 6px; }
.controls .spacer { flex: 1; }
.controls button {
  width: 52px;
  height: 52px;
  padding: 0;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(20, 22, 26, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.14);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.controls button svg { width: 24px; height: 24px; }
.controls #playBtn { width: 60px; height: 60px; }
.controls #playBtn svg { width: 28px; height: 28px; }
.controls button[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); border-color: transparent; }

/* ---------- settings ---------- */
.settings {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(400px, 100%);
  background: var(--panel);
  border-left: 1px solid var(--line);
  padding: max(18px, env(safe-area-inset-top)) 20px 24px;
  overflow-y: auto;
  z-index: 20;
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}
.settings-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.settings h2 { margin: 0; font-size: 20px; }
#settingsClose { width: 44px; height: 44px; padding: 0; display: grid; place-items: center; border-radius: 50%; }
#settingsClose svg { width: 22px; height: 22px; }
.field { margin: 16px 0; }
.timing-note { color: var(--muted); font-size: 14px; margin: 14px 0 6px; }
.field > span { display: block; font-size: 14px; color: var(--muted); margin-bottom: 6px; }
.check { display: flex; gap: 12px; align-items: flex-start; margin: 14px 0; cursor: pointer; }
.check input { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--accent); flex: none; }
.copy-row { display: flex; gap: 8px; }
.copy-row input { font-size: 13px; padding: 10px; color: var(--muted); }
.folder-info { border-top: 1px solid var(--line); margin-top: 20px; padding-top: 14px; }
.folder-info p { color: var(--muted); font-size: 14px; margin: 0 0 10px; word-break: break-word; }
.keys { color: var(--muted); font-size: 13px; margin-top: 18px; }
kbd { border: 1px solid var(--line); border-radius: 4px; padding: 0 5px; font: inherit; }

/* ---------- small things ---------- */
.busy {
  position: fixed;
  right: 18px;
  top: 18px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 3px solid rgba(255, 255, 255, 0.2);
  border-top-color: var(--accent);
  animation: spin 0.9s linear infinite;
  z-index: 15;
}
body.no-ui .busy { display: none; }
.toast {
  position: fixed;
  left: 50%;
  bottom: 120px;
  transform: translate(-50%, 20px);
  max-width: min(560px, calc(100% - 32px));
  background: rgba(18, 20, 24, 0.92);
  border: 1px solid var(--line);
  color: var(--text);
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 15px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 40;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
body.no-ui .toast { display: none; }

@media (max-width: 520px) {
  .card { padding: 24px; }
  h1 { font-size: 26px; }
  .controls { gap: 4px; }
  .controls button { width: 46px; height: 46px; }
  .controls #playBtn { width: 54px; height: 54px; }
}
@media (prefers-reduced-motion: reduce) {
  .layer { transition: none; }
}