:root {
  --bg: #0d1117;
  --bg2: #161b22;
  --card: #1c2230;
  --line: #2b3345;
  --txt: #e6edf3;
  --muted: #8b98a9;
  --accent: #4f8cff;
  --accent2: #6ee7b7;
  --danger: #ff5d5d;
  --radius: 14px;
  --shadow: 0 8px 30px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }
/* Asegura que el atributo `hidden` gane sobre clases con display:flex/grid */
[hidden] { display: none !important; }
html, body { margin: 0; padding: 0; }
body {
  background: radial-gradient(1200px 600px at 80% -10%, #1a2440 0%, var(--bg) 55%);
  color: var(--txt);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  min-height: 100vh;
}

.app { max-width: 1280px; margin: 0 auto; padding: 20px 20px 60px; }

/* Topbar */
.topbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.brand { display: flex; align-items: center; gap: 14px; }
.logo { font-size: 34px; filter: drop-shadow(0 4px 8px rgba(0,0,0,.4)); }
.brand h1 { margin: 0; font-size: 22px; letter-spacing: .3px; }
.tagline { margin: 0; color: var(--muted); font-size: 12.5px; }
.status { display: flex; align-items: center; gap: 8px; background: var(--bg2); border: 1px solid var(--line);
  padding: 8px 14px; border-radius: 999px; font-size: 13px; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--accent2); box-shadow: 0 0 8px var(--accent2); }
.dot.rec { background: var(--danger); box-shadow: 0 0 10px var(--danger); animation: pulse 1s infinite; }
.dot.paused { background: #f5c451; box-shadow: 0 0 8px #f5c451; }
.timer { font-variant-numeric: tabular-nums; font-weight: 600; margin-left: 4px; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .35; } }

/* Layout */
.layout { display: grid; grid-template-columns: 1fr 340px; gap: 20px; align-items: start; }
@media (max-width: 900px) { .layout { grid-template-columns: 1fr; } }

/* Stage / preview */
.stage { display: flex; flex-direction: column; gap: 14px; }
.preview-wrap { position: relative; background: #05070c; border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); aspect-ratio: 16/9; }
#preview { width: 100%; height: 100%; display: block; object-fit: contain; touch-action: none; cursor: crosshair; }
.preview-empty { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center;
  justify-content: center; text-align: center; padding: 24px; color: var(--muted); gap: 6px; }
.empty-icon { font-size: 52px; opacity: .8; }
.preview-empty .hint { font-size: 12.5px; max-width: 420px; }
.rec-badge { position: absolute; top: 12px; left: 12px; background: rgba(255,93,93,.15); color: var(--danger);
  border: 1px solid var(--danger); padding: 4px 10px; border-radius: 8px; font-weight: 700; font-size: 12px;
  letter-spacing: .5px; backdrop-filter: blur(4px); }

/* Transport */
.transport { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; background: var(--bg2); color: var(--txt);
  border: 1px solid var(--line); padding: 11px 16px; border-radius: 11px; font-size: 14px; font-weight: 600;
  cursor: pointer; transition: transform .06s ease, background .15s ease, border-color .15s; }
.btn:hover:not(:disabled) { border-color: var(--accent); transform: translateY(-1px); }
.btn:active:not(:disabled) { transform: translateY(0); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn .ic { font-size: 15px; }
.btn-primary { background: linear-gradient(180deg, #5b93ff, #3f74e0); border-color: #5b93ff; color: #fff; }
.btn-danger { background: linear-gradient(180deg, #ff6b6b, #e14545); border-color: #ff6b6b; color: #fff; }
.btn-ghost { background: transparent; }
.btn-sm { padding: 7px 12px; font-size: 12.5px; }

.zoom-live { display: flex; align-items: center; gap: 8px; margin-left: auto; font-size: 12.5px; color: var(--muted); }
.zoom-live input[type=range] { width: 130px; }

/* Sidebar cards */
.sidebar { display: flex; flex-direction: column; gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.card h2 { margin: 0 0 12px; font-size: 14px; color: var(--txt); letter-spacing: .2px;
  display: flex; align-items: center; gap: 8px; }
.card h2::before { content: ""; width: 4px; height: 14px; background: var(--accent); border-radius: 2px; }

.field { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 6px 10px; margin-bottom: 12px; }
.field > span:first-child { grid-column: 1 / -1; font-size: 12.5px; color: var(--muted); }
.field select, .field input[type=text] { grid-column: 1 / -1; width: 100%; background: var(--bg);
  color: var(--txt); border: 1px solid var(--line); border-radius: 9px; padding: 9px 10px; font-size: 13.5px; }
.field input[type=range] { grid-column: 1; width: 100%; }
.range-val { grid-column: 2; font-size: 12px; color: var(--accent2); font-variant-numeric: tabular-nums; min-width: 44px; text-align: right; }

.check { display: flex; align-items: center; gap: 9px; margin-bottom: 10px; font-size: 13.5px; cursor: pointer; }
.check input { width: 16px; height: 16px; accent-color: var(--accent); }
.check:last-child { margin-bottom: 0; }

.note { font-size: 12px; color: var(--muted); background: var(--bg); border: 1px dashed var(--line);
  border-radius: 9px; padding: 9px 11px; margin: 8px 0 0; line-height: 1.45; }

input[type=range] { -webkit-appearance: none; appearance: none; height: 5px; background: var(--line);
  border-radius: 999px; outline: none; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent); cursor: pointer; box-shadow: 0 2px 6px rgba(0,0,0,.4); }
input[type=range]::-moz-range-thumb { width: 16px; height: 16px; border: none; border-radius: 50%;
  background: var(--accent); cursor: pointer; }

/* Result */
.result { margin-top: 24px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.result h2 { margin: 0 0 14px; font-size: 16px; }
.result video { width: 100%; max-height: 460px; background: #000; border-radius: 10px; }
.result-actions { display: flex; gap: 10px; align-items: center; margin-top: 14px; flex-wrap: wrap; }
.result-actions input[type=text] { flex: 1; min-width: 180px; background: var(--bg); color: var(--txt);
  border: 1px solid var(--line); border-radius: 9px; padding: 10px 12px; font-size: 14px; }

/* Countdown */
.countdown-overlay { position: fixed; inset: 0; background: rgba(5,7,12,.72); display: flex; align-items: center;
  justify-content: center; z-index: 50; backdrop-filter: blur(3px); }
#countdownNum { font-size: 160px; font-weight: 800; color: #fff; text-shadow: 0 10px 40px rgba(0,0,0,.6);
  animation: pop .9s ease; }
@keyframes pop { 0% { transform: scale(.4); opacity: 0; } 40% { transform: scale(1.05); opacity: 1; } 100% { transform: scale(1); } }

/* Footer + toast */
.foot { text-align: center; color: var(--muted); font-size: 12px; margin-top: 30px; }
.toast { position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%); background: #262d3d;
  border: 1px solid var(--line); color: var(--txt); padding: 12px 18px; border-radius: 11px; box-shadow: var(--shadow);
  z-index: 60; font-size: 13.5px; max-width: 90vw; }
.toast.err { border-color: var(--danger); }