:root{
  --bg: #000000;
  --panel: rgba(255,255,255,0.06);
  --panel-border: rgba(255,255,255,0.12);
  --text: #e8eefc;
  --muted: rgba(232,238,252,0.72);
  --danger: #ff5252;
  --primary: #4aa3ff;

  --caption-font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  --caption-font-size: 64px;
  --caption-font-weight: 600;
  --caption-line-height: 1.2;
  --caption-color: #ffffff;
  --caption-bg: #000000;
  --caption-stroke: 0px;
}

*{ box-sizing:border-box; }
html, body { height: 100%; }
body{
  margin:0;
  overflow:hidden;
  background: linear-gradient(180deg, #0b1220 0%, #050814 60%, #04040b 100%);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
}

.app{
  height:100%;
  display:flex;
  flex-direction:column;
}

.header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: 18px 18px 10px;
  gap: 12px;
}

.brand-title{ font-size: 18px; font-weight: 700; letter-spacing: 0.2px; }
.brand-subtitle{ margin-top: 2px; font-size: 12px; color: var(--muted); }
.header-actions{ display:flex; gap:10px; }

.layout{
  flex:1;
  display:grid;
  grid-template-columns: 420px 1fr;
  gap: 14px;
  padding: 0 18px 18px;
}

.panel{
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  overflow:hidden;
  backdrop-filter: blur(10px);
}

.controls{
  padding: 14px;
  display:flex;
  flex-direction:column;
  gap: 14px;
}

.card{
  background: rgba(0,0,0,0.24);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 12px;
  padding: 12px;
}
.card-title{ font-size: 13px; font-weight: 700; margin-bottom: 10px; color: rgba(255,255,255,0.86); }

.grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.field{ display:flex; flex-direction:column; gap:6px; }
.label{ font-size: 11px; color: var(--muted); }
.select, .input{
  width:100%;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(10,14,28,0.65);
  color: var(--text);
  padding: 10px 10px;
  outline:none;
}
.input[type="color"]{
  padding: 6px;
  height: 42px;
}
.select:focus, .input:focus{
  border-color: rgba(74,163,255,0.6);
  box-shadow: 0 0 0 3px rgba(74,163,255,0.20);
}

.row{
  display:flex;
  align-items:center;
  gap: 10px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.btn{
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.16);
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.92);
  padding: 10px 12px;
  font-weight: 700;
  cursor:pointer;
  user-select:none;
}
.btn:hover{ background: rgba(255,255,255,0.10); }
.btn:active{ transform: translateY(1px); }
.btn[disabled]{ opacity:0.45; cursor:not-allowed; }
.btn-primary{
  border-color: rgba(74,163,255,0.45);
  background: rgba(74,163,255,0.16);
}
.btn-primary:hover{ background: rgba(74,163,255,0.22); }
.btn-danger{
  border-color: rgba(255,82,82,0.5);
  background: rgba(255,82,82,0.14);
}
.btn-danger:hover{ background: rgba(255,82,82,0.20); }

.hint{
  margin-top: 10px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.35;
}
.hint kbd{
  padding: 1px 6px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.20);
  background: rgba(0,0,0,0.25);
  color: rgba(255,255,255,0.90);
  font-size: 11px;
}

.check{
  display:flex;
  align-items:center;
  gap:8px;
  font-size: 12px;
  color: rgba(255,255,255,0.84);
}

.meter-wrap{
  padding: 6px 8px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(10,14,28,0.55);
}
#meter{ display:block; }

.captions{
  display:flex;
  flex-direction:column;
  min-height: 420px;
}
.captions-topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: 12px 14px;
  border-bottom: 1px solid rgba(255,255,255,0.10);
}

.status{ display:flex; align-items:center; gap:10px; font-weight:700; }
.dot{
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.25);
  box-shadow: 0 0 0 4px rgba(255,255,255,0.06);
}
.dot.live{
  background: rgba(68, 214, 116, 0.95);
  box-shadow: 0 0 0 4px rgba(68, 214, 116, 0.18);
}
.dot.err{
  background: rgba(255,82,82,0.95);
  box-shadow: 0 0 0 4px rgba(255,82,82,0.18);
}
.muted{ color: var(--muted); font-size: 12px; }

.caption-stage{
  position: relative;
  background: var(--caption-bg);
  display:flex;
  flex-direction:column;
  padding: 26px 28px;
  height: calc(100vh - 170px);
  max-height: calc(100vh - 170px);
  overflow-y:auto;
}

/* Fade overlay: older lines at top appear dimmer, newest at bottom stay full brightness */
.caption-stage::before{
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 50%;
  pointer-events: none;
  z-index: 1;
  background: linear-gradient(to bottom, var(--caption-bg) 0%, transparent 100%);
}

.final{
  font-family: var(--caption-font-family);
  font-size: var(--caption-font-size);
  font-weight: var(--caption-font-weight);
  line-height: var(--caption-line-height);
  color: var(--caption-color);
  text-shadow:
    0 0 0 rgba(0,0,0,0),
    0 0 0 rgba(0,0,0,0);
  -webkit-text-stroke: var(--caption-stroke) rgba(0,0,0,0.92);
  white-space: pre-wrap;
  word-break: break-word;
}

.interim{
  margin-top: 16px;
  font-family: var(--caption-font-family);
  font-size: calc(var(--caption-font-size) * 0.86);
  font-weight: 500;
  line-height: var(--caption-line-height);
  color: rgba(255,255,255,0.78);
  -webkit-text-stroke: calc(var(--caption-stroke) * 0.8) rgba(0,0,0,0.92);
  white-space: pre-wrap;
  word-break: break-word;
}

/* Display mode: hide controls and maximize captions */
body.display-mode .layout{
  grid-template-columns: 1fr;
  padding: 0;
  gap: 0;
}
body.display-mode .controls{ display:none; }
body.display-mode .header{
  padding: 10px 14px;
  background: rgba(0,0,0,0.35);
  border-bottom: 1px solid rgba(255,255,255,0.10);
}
body.display-mode .captions{
  border-radius: 0;
  border: none;
}
body.display-mode .caption-stage{
  padding: 34px 40px;
}
body.display-mode .brand-subtitle{ display:none; }

@media (max-width: 980px){
  .layout{ grid-template-columns: 1fr; }
}