:root {
  --bg: #f6f6f4;
  --card: #ffffff;
  --text: #1c1c1e;
  --muted: #6b6b70;
  --border: #e3e3e0;
  --accent: #d93f3f;
  --accent-hover: #c23434;
  --accent-soft: #fbeaea;
  --field: #fafaf9;
  --notice-bg: #fff6e0;
  --notice-text: #7a5600;
  --radius: 14px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141416;
    --card: #1e1e21;
    --text: #ececef;
    --muted: #9a9aa2;
    --border: #2e2e33;
    --accent: #ec5a5a;
    --accent-hover: #f27070;
    --accent-soft: #3a2224;
    --field: #18181b;
    --notice-bg: #33290f;
    --notice-text: #f1d18a;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, sans-serif;
}

.wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 20px 64px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

.muted { color: var(--muted); }

/* Cabecera */
.hero { display: flex; align-items: center; gap: 16px; margin-bottom: 6px; }
.logo {
  flex: none; width: 48px; height: 48px; border-radius: 12px;
  display: grid; place-items: center;
  background: var(--accent); color: #fff;
}
h1 { margin: 0; font-size: 1.7rem; letter-spacing: -0.02em; }
.lead { margin: 2px 0 0; color: var(--muted); }

/* Tarjetas */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

/* Formulario */
.url-row { display: flex; gap: 10px; flex-wrap: wrap; }
input, select {
  font: inherit; color: inherit;
  background: var(--field);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 13px;
}
input:focus, select:focus, button:focus-visible, .output:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 1px;
}
#url { flex: 1 1 300px; min-width: 0; }

button {
  font: inherit; cursor: pointer;
  border-radius: 10px; padding: 9px 14px;
  border: 1px solid var(--border);
  background: var(--card); color: var(--text);
}
button:hover { border-color: var(--muted); }
button:disabled { opacity: .55; cursor: progress; }
button.primary {
  background: var(--accent); border-color: var(--accent); color: #fff;
  font-weight: 600; padding: 11px 22px;
}
button.primary:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); }

.options { margin-top: 14px; }
.options summary { cursor: pointer; color: var(--muted); user-select: none; width: fit-content; }
.grid {
  display: grid; gap: 12px; margin-top: 12px;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
}
.grid label { display: flex; flex-direction: column; gap: 5px; font-size: .9rem; color: var(--muted); }
.grid select { color: var(--text); }
.hint { font-size: .85rem; color: var(--muted); margin: 12px 0 0; }

/* Progreso */
.status-row { display: flex; align-items: center; gap: 10px; }
#status-pct { margin-left: auto; font-variant-numeric: tabular-nums; }
.spinner {
  width: 16px; height: 16px; flex: none; border-radius: 50%;
  border: 2px solid var(--border); border-top-color: var(--accent);
  animation: spin .8s linear infinite;
}
.bar { margin-top: 12px; height: 6px; border-radius: 3px; background: var(--border); overflow: hidden; }
#bar-fill { height: 100%; width: 0; background: var(--accent); border-radius: 3px; transition: width .3s; }
.bar.indeterminate #bar-fill { width: 35%; animation: slide 1.2s ease-in-out infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes slide { from { transform: translateX(-100%); } to { transform: translateX(290%); } }

/* Error */
.error { border-color: var(--accent); background: var(--accent-soft); }

/* Resultado */
.video { display: flex; gap: 16px; align-items: flex-start; flex-wrap: wrap; }
#thumb { width: 180px; max-width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-radius: 10px; display: block; background: var(--border); }
.video-info { flex: 1 1 260px; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
#title { color: var(--text); font-weight: 650; font-size: 1.1rem; text-decoration: none; overflow-wrap: anywhere; }
#title:hover { text-decoration: underline; }
.meta { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; margin-top: 6px; font-size: .88rem; }
.badge { background: var(--accent-soft); color: var(--accent); padding: 3px 10px; border-radius: 999px; font-weight: 550; }

.notice { margin: 14px 0 0; padding: 10px 14px; border-radius: 10px; background: var(--notice-bg); color: var(--notice-text); font-size: .9rem; }

.toolbar { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; margin: 18px 0 12px; }
.tabs { display: flex; background: var(--field); border: 1px solid var(--border); border-radius: 10px; padding: 3px; }
.tab { border: none; background: transparent; padding: 6px 14px; border-radius: 8px; color: var(--muted); }
.tab.active { background: var(--card); color: var(--text); box-shadow: 0 1px 2px rgba(0, 0, 0, .12); }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }

.output {
  white-space: pre-wrap; overflow-wrap: anywhere;
  max-height: 60vh; overflow-y: auto;
  background: var(--field); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px 18px; font-size: 1rem; line-height: 1.7;
}
.output.mono { font: .88rem/1.7 ui-monospace, "SF Mono", Menlo, Consolas, monospace; }

/* Información: cómo funciona y limitaciones */
.info {
  display: grid; gap: 28px 36px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  margin-top: 18px; padding-top: 30px;
  border-top: 1px solid var(--border);
}
.info h2 { margin: 0 0 14px; font-size: 1.05rem; letter-spacing: -0.01em; }
.info p, .info li { color: var(--muted); font-size: .92rem; }
.info p { margin: 14px 0 0; }
.info strong { color: var(--text); font-weight: 600; }
.steps, .limits { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.steps { counter-reset: step; }
.steps li { counter-increment: step; position: relative; padding-left: 36px; }
.steps li::before {
  content: counter(step);
  position: absolute; left: 0; top: 0;
  width: 24px; height: 24px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent);
  font-size: .8rem; font-weight: 650;
}
.limits li { position: relative; padding-left: 18px; }
.limits li::before {
  content: "";
  position: absolute; left: 3px; top: .62em;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); opacity: .7;
}

.info a, .proxy a, .error a { color: var(--accent); text-underline-offset: 2px; }

/* Explicación del bloqueo de YouTube y del proxy */
.proxy { scroll-margin-top: 16px; }
.proxy h2 { margin: 0 0 12px; font-size: 1.05rem; letter-spacing: -0.01em; }
.proxy h3 { margin: 22px 0 10px; font-size: .95rem; }
.proxy p, .proxy li { color: var(--muted); font-size: .92rem; }
.proxy p { margin: 0 0 10px; }
.proxy strong { color: var(--text); font-weight: 600; }
.proxy code {
  font: .85em ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  background: var(--field); border: 1px solid var(--border);
  border-radius: 6px; padding: 1px 6px; color: var(--text);
  overflow-wrap: anywhere;
}
.admin {
  margin-top: 22px; border: 1px solid var(--border); border-radius: 10px;
  background: var(--field); padding: 14px 16px;
}
.admin summary { cursor: pointer; font-weight: 600; color: var(--text); }
.admin[open] summary { margin-bottom: 16px; }
.admin p:last-child { margin-bottom: 0; }
.admin .steps { margin-bottom: 16px; }
.envs { display: flex; flex-direction: column; gap: 6px; margin: 10px 0; }
.error a { display: inline-block; margin-top: 6px; font-weight: 600; }
html { scroll-behavior: smooth; }

@media (max-width: 520px) {
  .wrap { padding-top: 28px; }
  h1 { font-size: 1.4rem; }
  button.primary { flex: 1; }
  #thumb { width: 100%; }
}