:root {
    --primary: #2c6dff;
    --secondary: #0f172a;
    --background: #f5f7fb;
    --text: #1f2937;
    --muted: #64748b;
    --border: #e2e8f0;
    --error: #dc2626;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background: var(--background);
    color: var(--text);
}

.container {
    width: min(1100px, 92%);
    margin: 0 auto;
    padding: 1.5rem 0;
}

.app-header {
    background: var(--secondary);
    color: #fff;
    box-shadow: 0 2px 6px rgba(15, 23, 42, 0.2);
}

.app-header h1 {
    margin: 0;
}

.app-header nav {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.app-header .logout {
    color: #fff;
    text-decoration: none;
    border: 1px solid rgba(255,255,255,0.6);
    padding: 0.35rem 0.8rem;
    border-radius: 6px;
    transition: background 0.2s;
}

.app-header .logout:hover {
    background: rgba(255,255,255,0.12);
}

.card {
    background: #fff;
    border-radius: 12px;
    padding: 1.8rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

h2 {
    margin-top: 0;
}

.form-grid {
    display: grid;
    gap: 1rem;
}

.form-inline {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: flex-end;
}

label {
    display: flex;
    flex-direction: column;
    font-size: 0.95rem;
    gap: 0.35rem;
}

input[type="text"],
input[type="password"],
input[type="url"],
select,
button {
    font: inherit;
    padding: 0.6rem 0.75rem;
    border-radius: 8px;
    border: 1px solid var(--border);
}

input:focus,
button:focus {
    outline: 2px solid var(--primary);
    border-color: transparent;
}

.btn {
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn.primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 8px 15px rgba(44, 109, 255, 0.3);
}

.btn.primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 18px rgba(44, 109, 255, 0.35);
}

.btn.secondary {
    background: #fff;
    color: var(--secondary);
    border: 1px solid var(--secondary);
}

.btn.secondary:hover {
    background: rgba(15, 23, 42, 0.05);
}

.btn.tertiary {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}

.btn.tertiary:hover {
    background: rgba(44, 109, 255, 0.12);
}

.or-separator {
    text-align: center;
    font-size: 0.85rem;
    color: var(--muted);
}

.search-results {
    display: grid;
    gap: 0.5rem;
}

.search-result {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: #fff;
    cursor: pointer;
    transition: border-color 0.2s, transform 0.15s;
}

.search-result:hover {
    border-color: var(--primary);
    transform: translateY(-1px);
}

.search-result .title {
    font-weight: 600;
}

.search-result .channel {
    color: var(--muted);
    font-size: 0.85rem;
}

.hidden {
    display: none;
}

.metadata-preview {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    align-items: center;
}

.metadata-preview img {
    width: 120px;
    height: 120px;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(15, 23, 42, 0.2);
}

.status {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 8px;
    background: rgba(44, 109, 255, 0.1);
    color: var(--secondary);
    display: none;
}

.status.visible {
    display: block;
}

.loading {
    display: none;
    color: var(--muted);
    font-style: italic;
}

.loading.visible {
    display: block;
}

.loading-overlay {
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 1rem;
    padding: 2rem 0;
    color: var(--muted);
}

.loading-overlay.visible {
    display: flex;
}

.loading-overlay .spinner {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 4px solid rgba(44, 109, 255, 0.2);
    border-top-color: var(--primary);
    animation: spin 0.8s linear infinite;
}

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

.playlist-picker {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

#meta-playlist {
    flex: 1;
}

.alert {
    padding: 0.75rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.alert-error {
    background: rgba(220, 38, 38, 0.1);
    color: var(--error);
}

.small {
    font-size: 0.85rem;
    color: var(--muted);
}

.app-footer {
    text-align: center;
    padding: 1.5rem 0;
    color: var(--muted);
}

@media (max-width: 720px) {
    .metadata-preview {
        flex-direction: column;
        align-items: flex-start;
    }
}