:root {
    color-scheme: light dark;
    --bg: #f7f7fa;
    --card-bg: #ffffff;
    --border: #ddd;
    --text: #1b1b1f;
    --accent: #5b4bcf;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #1b1b1f;
        --card-bg: #26262c;
        --border: #3a3a42;
        --text: #f0f0f5;
    }
}

* { box-sizing: border-box; }

body {
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 0 1.5rem 3rem;
}

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1.5rem;
}

header a { color: var(--text); text-decoration: none; }
header h1 a { color: var(--accent); }
nav a { margin-left: 1.5rem; }

main { max-width: 1400px; width: 94%; margin: 0 auto; }

footer {
    max-width: 1400px;
    width: 94%;
    margin: 2rem auto 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    opacity: 0.6;
    text-align: center;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
}

.page-with-sidebar {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.page-with-sidebar .main-col {
    flex: 1;
    min-width: 0;
}

.page-with-sidebar .sidebar-col {
    flex: 0 0 300px;
}

.bracket-info dt {
    font-weight: 600;
    margin-top: 0.9rem;
}

.bracket-info dt:first-child {
    margin-top: 0;
}

.bracket-info dd {
    margin: 0.15rem 0 0 0;
    font-size: 0.88rem;
    opacity: 0.85;
}

@media (max-width: 700px) {
    .page-with-sidebar {
        flex-direction: column;
    }
    .page-with-sidebar .sidebar-col {
        flex: 1;
        order: 2;
    }
    .page-with-sidebar .main-col {
        order: 1;
    }
}

form label {
    display: block;
    margin-bottom: 0.75rem;
}

form input {
    display: block;
    margin-top: 0.25rem;
    padding: 0.4rem;
    width: 100%;
    max-width: 320px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--bg);
    color: var(--text);
}

button {
    background: var(--accent);
    color: white;
    border: none;
    padding: 0.6rem 1.2rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
}

button:hover { opacity: 0.9; }

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 0.75rem;
}

th, td {
    text-align: left;
    padding: 0.4rem 0.6rem;
    border-bottom: 1px solid var(--border);
}

.notice {
    background: #e6f4ea;
    border: 1px solid #b7dfc2;
    color: #1c4a2a;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}

.notice.warning {
    background: #fff8e1;
    border-color: #f0d778;
    color: #6b5300;
}

.notice.error {
    background: #fdecea;
    border-color: #f5b7b1;
    color: #7a271a;
}

.hint {
    font-size: 0.85rem;
    opacity: 0.75;
}

.inline-form {
    display: inline;
    margin-left: 0.75rem;
}

.link-button {
    background: none;
    border: none;
    padding: 0;
    color: #c0392b;
    text-decoration: underline;
    cursor: pointer;
    font-size: inherit;
}

.danger-button {
    background: #c0392b;
    margin-bottom: 1rem;
}

.export-buttons {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.synergy-badge {
    display: inline-block;
    padding: 0.1rem 0.5rem;
    border-radius: 999px;
    background: rgba(91, 75, 207, 0.15);
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 600;
}

.ai-explanation {
    font-size: 0.85rem;
    opacity: 0.8;
    margin-top: 0.2rem;
    font-style: italic;
}

.card-thumb {
    width: 44px;
    height: auto;
    border-radius: 4px;
    vertical-align: middle;
    display: block;
    cursor: zoom-in;
}

.commander-hero img {
    cursor: zoom-in;
}

#lightbox-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    align-items: center;
    justify-content: center;
    z-index: 2000;
    cursor: zoom-out;
    padding: 2rem;
}

#lightbox-overlay.visible {
    display: flex;
}

#lightbox-overlay img {
    max-width: min(90vw, 500px);
    max-height: 90vh;
    border-radius: 14px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6);
}

.card-thumb-cell {
    width: 44px;
}

.commander-hero {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    margin-bottom: 1rem;
}

.commander-hero img {
    width: 160px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
}

#loading-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    z-index: 1000;
    color: white;
    text-align: center;
    padding: 1rem;
}

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

.spinner {
    width: 48px;
    height: 48px;
    border: 5px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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