*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --bg: #f3f4f6;
  --bg-alt: #ffffff;
  --fg: #111827;
  --border: #e5e7eb;
  --accent: #2563eb;
  --accent-soft: #dbeafe;
  --muted: #6b7280;
  --danger: #dc2626;
  --danger-soft: #fee2e2;
}

body.dark {
  --bg: #020617;
  --bg-alt: #020617;
  --fg: #e5e7eb;
  --border: #1f2937;
  --accent: #3b82f6;
  --accent-soft: #1e293b;
  --muted: #9ca3af;
  --danger: #f97373;
  --danger-soft: #451a1a;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--bg);
  color: var(--fg);
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background-color: var(--bg-alt);
}

.brand h1 {
  margin: 0;
  font-size: 1.3rem;
}

.brand p {
  margin: 0.2rem 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.header-actions button {
  padding: 0.4rem 0.8rem;
  font-size: 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background-color: var(--bg);
  color: var(--fg);
  cursor: pointer;
}

.app-main {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 1.5rem;
  padding: 1.5rem;
}

.sidebar {
  background-color: var(--bg-alt);
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.sidebar h2 {
  font-size: 1rem;
  margin: 0.2rem 0;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.9rem;
}

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

input[type="text"],
input[type="file"],
select {
  padding: 0.45rem 0.5rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
  background-color: var(--bg);
  color: var(--fg);
  font-size: 0.9rem;
}

input[type="file"] {
  padding: 0.25rem;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  color: var(--muted);
}

button {
  border-radius: 0.5rem;
  border: 1px solid var(--border);
  padding: 0.45rem 0.75rem;
  background-color: var(--bg-alt);
  color: var(--fg);
  font-size: 0.9rem;
  cursor: pointer;
}

button.primary {
  background-color: var(--accent);
  color: white;
  border-color: var(--accent);
}

button.danger {
  background-color: var(--danger);
  border-color: var(--danger);
  color: white;
}

button.full-width {
  width: 100%;
}

button:disabled {
  opacity: 0.6;
  cursor: default;
}

.status {
  font-size: 0.8rem;
  color: var(--muted);
  min-height: 1.2rem;
}

.content {
  background-color: var(--bg-alt);
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.content-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.content-header h2 {
  margin: 0;
  font-size: 1.1rem;
}

#video-count {
  font-size: 0.9rem;
  color: var(--muted);
}

.videos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.video-card {
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  background-color: var(--bg);
}

.video-card.highlight {
  border-color: var(--accent);
  background-color: var(--accent-soft);
}

.video-player {
  width: 100%;
  max-height: 220px;
  background-color: black;
}

.video-header {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.video-title-input {
  flex: 1;
  padding: 0.3rem 0.5rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
  background-color: var(--bg-alt);
  color: var(--fg);
}

.favorite-btn {
  width: 2.2rem;
  text-align: center;
  font-size: 1.1rem;
}

.video-meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.video-meta strong {
  color: var(--fg);
}

.video-meta-edit {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.video-meta-edit input[type="text"] {
  font-size: 0.85rem;
}

.video-meta-edit button {
  font-size: 0.8rem;
}

.app-footer {
  border-top: 1px solid var(--border);
  padding: 0.75rem 1.5rem;
  font-size: 0.8rem;
  color: var(--muted);
}

/* Layout responsive */
@media (max-width: 900px) {
  .app-main {
    grid-template-columns: minmax(0, 1fr);
  }
}