:root {
  color-scheme: light dark;
  --bg: #0f1115;
  --card: #171a21;
  --border: #2a2e38;
  --text: #f2f3f5;
  --muted: #9aa0ab;
  --accent: #3d8bfd;
  --accent-text: #ffffff;
  --error: #ff6b6b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.card {
  width: 100%;
  max-width: 480px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
}

h1 {
  font-size: 1.4rem;
  margin: 0 0 4px;
}

.subtitle {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 0.9rem;
}

#form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

input[type="url"] {
  width: 100%;
  padding: 14px;
  font-size: 1rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #10131a;
  color: var(--text);
}

input[type="url"]:focus {
  outline: 2px solid var(--accent);
}

button,
.download-btn {
  padding: 14px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
}

#submitBtn {
  background: var(--accent);
  color: var(--accent-text);
}

#submitBtn:disabled {
  opacity: 0.6;
  cursor: default;
}

.status {
  margin-top: 14px;
  font-size: 0.9rem;
}

.status.error {
  color: var(--error);
}

.loading {
  margin-top: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--muted);
}

.spinner {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}

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

.result {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

#preview {
  width: 100%;
  border-radius: 10px;
  background: black;
}

.video-title {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
  word-break: break-word;
}

.download-btn {
  background: #22c55e;
  color: #06210f;
  display: block;
}

.download-btn.disabled {
  opacity: 0.6;
  pointer-events: none;
}

.loading[hidden],
.result[hidden] {
  display: none;
}

.disclaimer {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  line-height: 1.4;
  color: var(--muted);
}