:root {
  --bg: #0b0c10;
  --surface: #12141a;
  --card: #161922;
  --text: #e7e9ee;
  --muted: #a9b0bf;
  --accent: #4f8cff;
  --accent-2: #7bffa6;
  --danger: #ff5d5d;
  --ring: #2a3346;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica Neue, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1200px 600px at 10% 0%, #111425 0%, var(--bg) 40%);
  color: var(--text);
}

.container {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 16px;
}

.header h1 {
  margin: 0 0 6px;
  font-size: 2rem;
  letter-spacing: 0.3px;
}

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

.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border: 1px solid var(--ring);
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
  padding: 20px;
  margin: 18px 0;
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

input[type="url"] {
  width: 100%;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--ring);
  background: var(--surface);
  color: var(--text);
  outline: none;
}

input[type="url"]:focus { border-color: var(--accent); box-shadow: 0 0 0 4px rgba(79,140,255,0.15); }

.actions { display: flex; gap: 8px; flex-wrap: wrap; }

.btn {
  appearance: none;
  border: 1px solid var(--ring);
  background: var(--card);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 600;
}

.btn:hover { transform: translateY(-1px); }

.btn.primary { background: linear-gradient(180deg, var(--accent), #2a6cff); border-color: transparent; color: white; }

.btn.danger { border-color: rgba(255, 93, 93, 0.35); }

.btn.ghost { background: transparent; }

.hint { margin-top: 8px; color: var(--muted); }

.status { margin-top: 10px; min-height: 24px; }

.status.error { color: var(--danger); }
.status.success { color: var(--accent-2); }

.embed-controls { display: flex; gap: 8px; }

.embed {
  margin-top: 12px;
  min-height: 220px;
  border-radius: 12px;
  border: 1px dashed var(--ring);
  display: grid;
  place-items: center;
  overflow: hidden;
}

.embed iframe {
  width: 100%;
  height: 420px;
  border: 0;
}

.footer { color: var(--muted); text-align: center; margin-top: 24px; }

.small { font-size: 0.875rem; }

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

.list { margin: 0; padding-left: 18px; }

.list li { margin: 6px 0; }