@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

/* ============ TOKENS ============ */
:root{
  --bg-void: #0a0b0d;
  --bg-panel: #14171c;
  --bg-panel-raised: #191d23;
  --glass-fill: rgba(20, 23, 28, 0.62);
  --glass-border: rgba(255,255,255,0.09);
  --glass-border-strong: rgba(255,255,255,0.16);

  --signal: #3ddc97;
  --signal-dim: rgba(61, 220, 151, 0.16);
  --signal-glow: rgba(61, 220, 151, 0.35);
  --warn: #ff6b4a;
  --warn-dim: rgba(255, 107, 74, 0.16);

  --text-primary: #edeef0;
  --text-muted: #8b929e;
  --text-faint: #565c66;

  --font-display: 'Space Grotesk', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --ease: cubic-bezier(.2,.8,.2,1);
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  margin:0;
  background: var(--bg-void);
  color: var(--text-primary);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
button{ font-family: inherit; }
input, textarea{ font-family: inherit; }
:focus-visible{ outline: 2px solid var(--signal); outline-offset: 2px; border-radius: 4px; }
svg{ display:block; }

/* ============ SIGNAL MARK (signature element) ============ */
.brand__mark, .state-overlay__spinner{
  display:flex; align-items:flex-end; gap:3px; height:22px;
}
.brand__mark .bar, .state-overlay__spinner .bar{
  width:4px; border-radius:2px;
  background: linear-gradient(180deg, var(--signal), #1f8f63);
  animation: signal-bounce 1.1s ease-in-out infinite;
}
.b1{ height:40%; animation-delay: -0.9s; }
.b2{ height:100%; animation-delay: -0.6s; }
.b3{ height:65%; animation-delay: -0.3s; }
.b4{ height:90%; animation-delay: -1.1s; }
.b5{ height:50%; animation-delay: -0.15s; }
@keyframes signal-bounce{
  0%,100%{ transform: scaleY(0.35); opacity:.6; }
  50%{ transform: scaleY(1); opacity:1; }
}

/* ============ SCREENS ============ */
.screen{ min-height:100vh; min-height:100dvh; position:relative; }

/* ============ CONFIG SCREEN ============ */
.screen--config{
  display:flex; align-items:center; justify-content:center;
  padding: 48px 20px 64px;
}
.bg-noise{
  position:fixed; inset:0; pointer-events:none; opacity:.035; z-index:0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.bg-glow{
  position:fixed; inset:0; pointer-events:none; z-index:0;
  background:
    radial-gradient(560px 360px at 18% -6%, var(--signal-dim), transparent 60%),
    radial-gradient(640px 420px at 100% 110%, rgba(61,220,151,0.08), transparent 55%);
}
.config-shell{ position:relative; z-index:1; width:100%; max-width:560px; }

.brand{ display:flex; align-items:center; gap:14px; margin-bottom:28px; padding-left:4px; }
.brand__text h1{
  font-family: var(--font-display); font-weight:700; font-size:1.7rem; margin:0; letter-spacing:-0.01em;
}
.brand__text h1 em{ font-style:normal; color: var(--signal); }
.brand__text p{ margin:2px 0 0; color: var(--text-muted); font-size:.82rem; letter-spacing:.02em; }

.glass-card{
  background: var(--glass-fill);
  backdrop-filter: blur(22px) saturate(140%);
  -webkit-backdrop-filter: blur(22px) saturate(140%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 60px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.04);
}
.config-card{ padding: 30px 28px 26px; display:flex; flex-direction:column; gap:20px; }

.field{ display:flex; flex-direction:column; gap:7px; }
.field label{ font-size:.78rem; font-weight:600; color: var(--text-muted); letter-spacing:.03em; text-transform:uppercase; }
.field label .req{ color: var(--signal); }
.field input[type="text"], .field textarea{
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: .93rem;
  resize: vertical;
  transition: border-color .15s var(--ease), background .15s var(--ease);
}
.field input[type="text"]::placeholder, .field textarea::placeholder{ color: var(--text-faint); }
.field input[type="text"]:focus, .field textarea:focus{
  border-color: var(--signal); background: rgba(61,220,151,0.04); outline:none;
}
.field__hint{ margin:0; font-size:.74rem; color: var(--text-faint); }
.field__hint code{ color: var(--text-muted); }

.field-row{ display:flex; flex-direction:column; gap:10px; }
.field-group{ border:1px solid var(--glass-border); border-radius: var(--radius-sm); padding: 0 14px; }
.field-group summary{
  cursor:pointer; list-style:none; padding: 11px 0; font-size:.83rem; font-weight:600; color: var(--text-muted);
  display:flex; align-items:center; justify-content:space-between;
}
.field-group summary::-webkit-details-marker{ display:none; }
.field-group summary .opt{ font-weight:400; text-transform:none; color: var(--text-faint); font-size:.72rem; }
.field-group[open] summary{ color: var(--text-primary); }
.field-group .field{ padding-bottom:12px; }

.chip-group{ display:flex; flex-wrap:wrap; gap:8px; }
.chip{
  background: rgba(255,255,255,0.03); border:1px solid var(--glass-border); color: var(--text-muted);
  padding: 8px 14px; border-radius: 999px; font-size: .8rem; cursor:pointer;
  transition: all .15s var(--ease);
}
.chip:hover{ border-color: var(--glass-border-strong); color: var(--text-primary); }
.chip.is-active{
  background: var(--signal-dim); border-color: var(--signal); color: var(--signal);
  box-shadow: 0 0 0 1px var(--signal) inset;
}

.field--toggle{ flex-direction:row; align-items:center; justify-content:space-between; }
.field--toggle label{ text-transform:none; font-size:.88rem; color: var(--text-primary); font-weight:500; }
.switch{
  width:46px; height:26px; border-radius:999px; border:1px solid var(--glass-border);
  background: rgba(255,255,255,0.05); position:relative; cursor:pointer; padding:0; flex-shrink:0;
  transition: background .18s var(--ease), border-color .18s var(--ease);
}
.switch__knob{
  position:absolute; top:2px; left:2px; width:20px; height:20px; border-radius:50%;
  background: var(--text-muted); transition: transform .18s var(--ease), background .18s var(--ease);
}
.switch[aria-checked="true"]{ background: var(--signal-dim); border-color: var(--signal); }
.switch[aria-checked="true"] .switch__knob{ transform: translateX(20px); background: var(--signal); }

.form-error{
  margin:0; padding:10px 12px; border-radius: var(--radius-sm); background: var(--warn-dim);
  border:1px solid rgba(255,107,74,0.4); color:#ffb4a1; font-size:.82rem;
}

.play-btn{
  display:flex; align-items:center; justify-content:center; gap:8px;
  background: linear-gradient(180deg, var(--signal), #23b57c);
  color:#06110b; border:none; border-radius: var(--radius-sm);
  padding: 14px; font-weight:700; font-size:.95rem; letter-spacing:.06em; cursor:pointer;
  box-shadow: 0 10px 26px var(--signal-glow);
  transition: transform .12s var(--ease), box-shadow .12s var(--ease);
}
.play-btn:hover{ transform: translateY(-1px); box-shadow: 0 14px 32px var(--signal-glow); }
.play-btn:active{ transform: translateY(0); }

.footnote{ text-align:center; color: var(--text-faint); font-size:.74rem; margin-top:16px; }

/* ============ PLAYER SCREEN ============ */
.screen--player{ background:#000; display:flex; align-items:center; justify-content:center; }
.player-shell{ width:100%; max-width:1400px; margin:0 auto; }

.video-stage{
  position:relative; width:100%; aspect-ratio: 16/9; background:#000;
  border-radius: 0; overflow:hidden;
}
.video-stage video{ width:100%; height:100%; display:block; background:#000; object-fit:contain; }

.back-btn{
  position:absolute; top:16px; left:16px; z-index:20;
}

/* state overlay */
.state-overlay{
  position:absolute; inset:0; display:flex; flex-direction:column; align-items:center; justify-content:center;
  gap:14px; background: rgba(6,7,9,0.55); z-index:10; transition: opacity .25s var(--ease);
}
.state-overlay[hidden]{ display:none; }
.state-overlay__spinner{ height:34px; gap:5px; }
.state-overlay__spinner .bar{ width:5px; }
.state-overlay__label{ margin:0; color: var(--text-muted); font-size:.85rem; font-family: var(--font-mono); letter-spacing:.03em; }

.error-overlay{
  position:absolute; inset:0; z-index:11; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:10px;
  background: rgba(8,6,6,0.72); text-align:center; padding:24px;
}
.error-overlay__title{ margin:0; font-family: var(--font-display); font-weight:700; color:#ffb4a1; }
.error-overlay__msg{ margin:0; color: var(--text-muted); font-size:.86rem; max-width:420px; }
.error-overlay__retry{
  margin-top:8px; background: var(--signal-dim); border:1px solid var(--signal); color: var(--signal);
  padding:9px 20px; border-radius:999px; cursor:pointer; font-weight:600; font-size:.82rem;
}

/* controls */
.controls{
  position:absolute; left:0; right:0; bottom:0; z-index:15; padding: 30px 18px 14px;
  background: linear-gradient(180deg, transparent, rgba(0,0,0,0.78) 55%, rgba(0,0,0,0.88));
  opacity:1; transform: translateY(0); transition: opacity .25s var(--ease), transform .25s var(--ease);
}
.video-stage.is-idle .controls{ opacity:0; transform: translateY(6px); pointer-events:none; }
.video-stage.is-idle{ cursor:none; }

.controls__seek{ display:flex; align-items:center; gap:12px; margin-bottom:10px; }
.seekbar{
  position:relative; flex:1; height:5px; border-radius:999px; background: rgba(255,255,255,0.16); cursor:pointer;
}
.seekbar__buffered{ position:absolute; inset:0; width:0%; background: rgba(255,255,255,0.28); border-radius:999px; }
.seekbar__played{ position:absolute; inset:0; width:0%; background: var(--signal); border-radius:999px; }
.seekbar__handle{
  position:absolute; top:50%; left:0%; width:13px; height:13px; border-radius:50%;
  background: var(--signal); transform: translate(-50%,-50%); box-shadow: 0 0 0 4px var(--signal-dim);
}
.live-badge{
  display:flex; align-items:center; gap:6px; font-size:.72rem; font-weight:700; letter-spacing:.06em;
  color:#ff9c86; font-family: var(--font-mono); flex-shrink:0;
}
.live-badge .dot{ width:7px; height:7px; border-radius:50%; background: var(--warn); animation: pulse 1.4s ease-in-out infinite; }
@keyframes pulse{ 0%,100%{ opacity:1;} 50%{ opacity:.35; } }

.controls__row{ display:flex; align-items:center; justify-content:space-between; gap:10px; }
.controls__left, .controls__right{ display:flex; align-items:center; gap:4px; }

.icon-btn{
  background:transparent; border:none; color: var(--text-primary); width:38px; height:38px; border-radius:8px;
  display:flex; align-items:center; justify-content:center; cursor:pointer; position:relative;
  transition: background .15s var(--ease), color .15s var(--ease);
}
.icon-btn:hover{ background: rgba(255,255,255,0.08); color: var(--signal); }
.icon-btn__tag{ position:absolute; bottom:2px; right:1px; font-size:.5rem; font-family: var(--font-mono); font-weight:700; color:inherit; }

.volume{ display:flex; align-items:center; gap:6px; }
.volume input[type="range"]{
  width:70px; accent-color: var(--signal); cursor:pointer;
}
.time-display{
  font-family: var(--font-mono); font-size:.78rem; color: var(--text-muted); margin-left:6px; white-space:nowrap;
}
.time-sep{ margin:0 3px; }

/* settings panel */
.settings-panel{
  position:absolute; right:16px; bottom:74px; z-index:25; width:280px; max-width:calc(100% - 32px);
  background: rgba(20,23,28,0.88); backdrop-filter: blur(24px) saturate(160%); -webkit-backdrop-filter: blur(24px) saturate(160%);
  border:1px solid var(--glass-border-strong); border-radius: var(--radius-md);
  box-shadow: 0 20px 50px rgba(0,0,0,0.55);
  overflow:hidden; animation: panel-in .18s var(--ease);
}
@keyframes panel-in{ from{ opacity:0; transform: translateY(8px) scale(.98);} to{ opacity:1; transform:none;} }
.settings-view[hidden]{ display:none; }
.settings-row{
  width:100%; display:flex; align-items:center; justify-content:space-between; background:none; border:none;
  color: var(--text-primary); padding:13px 16px; font-size:.86rem; cursor:pointer; text-align:left;
  border-bottom:1px solid rgba(255,255,255,0.06);
}
.settings-row:hover{ background: rgba(255,255,255,0.05); }
.settings-row__val{ color: var(--text-muted); font-size:.78rem; font-family: var(--font-mono); }
.settings-back{
  width:100%; background:none; border:none; color: var(--signal); font-weight:600; text-align:left;
  padding:13px 16px; font-size:.84rem; cursor:pointer; border-bottom:1px solid rgba(255,255,255,0.06);
}
.settings-options{ max-height:260px; overflow-y:auto; }
.settings-option{
  display:flex; align-items:center; justify-content:space-between; width:100%; background:none; border:none;
  color: var(--text-muted); padding:11px 16px; font-size:.82rem; cursor:pointer; text-align:left; gap:10px;
}
.settings-option:hover{ background: rgba(255,255,255,0.05); color: var(--text-primary); }
.settings-option.is-selected{ color: var(--signal); }
.settings-option .opt-main{ display:flex; flex-direction:column; gap:2px; }
.settings-option .opt-sub{ font-size:.7rem; color: var(--text-faint); font-family: var(--font-mono); }
.settings-option.is-selected .opt-sub{ color: rgba(61,220,151,0.6); }
.settings-option .check{ opacity:0; color: var(--signal); }
.settings-option.is-selected .check{ opacity:1; }

/* info strip */
.info-strip{
  display:flex; flex-wrap:wrap; gap:0; background: var(--bg-panel); border-top:1px solid var(--glass-border);
  font-family: var(--font-mono); font-size:.72rem;
}
.info-strip__item{
  display:flex; flex-direction:column; gap:3px; padding:11px 18px; border-right:1px solid rgba(255,255,255,0.05); flex:1; min-width:120px;
}
.info-strip__k{ color: var(--text-faint); text-transform:uppercase; letter-spacing:.06em; font-size:.62rem; }
.info-strip__v{ color: var(--text-primary); }

/* toast */
.toast{
  position:fixed; left:50%; bottom:28px; transform: translateX(-50%); z-index:100;
  background: rgba(20,23,28,0.92); border:1px solid var(--glass-border-strong); color: var(--text-primary);
  padding:11px 20px; border-radius:999px; font-size:.82rem; box-shadow: 0 12px 30px rgba(0,0,0,0.5);
  animation: toast-in .2s var(--ease);
}
@keyframes toast-in{ from{ opacity:0; transform: translate(-50%, 10px);} to{ opacity:1; transform: translate(-50%,0);} }

/* ============ RESPONSIVE ============ */
@media (max-width: 640px){
  .config-card{ padding:24px 18px 22px; }
  .brand__text h1{ font-size:1.4rem; }
  .controls{ padding: 22px 10px 10px; }
  .controls__left{ gap:0; }
  .volume{ display:none; }
  .time-display{ font-size:.7rem; }
  .settings-panel{ right:8px; left:8px; width:auto; bottom:64px; }
  .info-strip{ font-size:.66rem; }
  .info-strip__item{ padding:9px 12px; min-width:100px; }
}

@media (min-width: 641px){
  .video-stage:fullscreen .controls, .video-stage:-webkit-full-screen .controls{ padding-bottom:20px; }
}

.video-stage:fullscreen, .video-stage:-webkit-full-screen{ aspect-ratio:auto; width:100vw; height:100vh; }
.video-stage:fullscreen video, .video-stage:-webkit-full-screen video{ height:100%; }