:root {
  --bg: #0f1115;
  --card: #171a21;
  --card-border: #262b36;
  --text: #e7eaf0;
  --muted: #9aa3b2;
  --accent: #f15f2c;
  --accent-hover: #ff7240;
  --field: #1f2430;
  --field-border: #313847;
  --danger-bg: #3a1d1d;
  --danger-border: #6b2b2b;
  --danger-text: #ffb4b4;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 32px 16px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #1b1f2a 0%, var(--bg) 60%);
  color: var(--text);
}

.card {
  width: 100%;
  max-width: 560px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.45);
}

.head h1 {
  margin: 0 0 6px;
  font-size: 26px;
  letter-spacing: -0.02em;
}

.head .sub {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 14px;
}

.field { margin-bottom: 16px; }

label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 7px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
}

textarea, input[type="url"] {
  width: 100%;
  background: var(--field);
  border: 1px solid var(--field-border);
  border-radius: 10px;
  color: var(--text);
  padding: 11px 13px;
  font-size: 14px;
  font-family: inherit;
  resize: vertical;
  transition: border-color .15s ease;
}

textarea:focus, input[type="url"]:focus {
  outline: none;
  border-color: var(--accent);
}

textarea { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12.5px; }

.primary {
  width: 100%;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  padding: 12px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: background .15s ease;
}

.primary:hover { background: var(--accent-hover); }
.primary:disabled { opacity: .6; cursor: progress; }

.help {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--field-border);
  color: var(--text);
  font-size: 11px;
  font-weight: 700;
  cursor: help;
  position: relative;
}

.help .tooltip {
  position: absolute;
  top: 24px;
  left: 0;
  z-index: 10;
  width: 320px;
  background: #0c0e13;
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 12px 14px;
  font-weight: 400;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--text);
  box-shadow: 0 12px 40px rgba(0,0,0,0.5);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity .15s ease, transform .15s ease;
}

.help:hover .tooltip,
.help:focus .tooltip { opacity: 1; visibility: visible; transform: translateY(0); }

.help .tooltip ol { margin: 8px 0 8px 18px; padding: 0; }
.help .tooltip li { margin-bottom: 4px; }
.help .tooltip code {
  background: var(--field);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 11.5px;
}

.results { margin-top: 22px; }

.alert {
  background: var(--danger-bg);
  border: 1px solid var(--danger-border);
  color: var(--danger-text);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 14px;
}

.found {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 12px;
}

.video {
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 14px;
  margin-bottom: 12px;
}

.video-title {
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 10px;
}

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

.variants form { margin: 0; }

.variant {
  border: 1px solid var(--field-border);
  background: var(--field);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: border-color .15s ease, background .15s ease;
}

.variant:hover { border-color: var(--accent); background: #242a38; }

.spinner {
  width: 15px;
  height: 15px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .7s linear infinite;
  display: none;
}

.htmx-request .spinner.htmx-indicator,
.spinner.htmx-indicator.htmx-request { display: inline-block; }

@keyframes spin { to { transform: rotate(360deg); } }

.foot {
  display: flex;
  gap: 14px;
  font-size: 12px;
  color: var(--muted);
}