:root,
html[data-theme="light"] {
    --bg: #f4f6fb;
    --surface: rgba(255, 255, 255, 0.92);
    --surface-soft: #f6f8fc;
    --surface-muted: #f3f5fb;
    --text: #151a28;
    --text-soft: #2e3445;
    --muted: #8a91a8;
    --accent: #5f74ef;
    --accent-soft: rgba(95, 116, 239, 0.12);
    --line: rgba(111, 125, 163, 0.16);
}

html[data-theme="dark"] {
    --bg: #0d1119;
    --surface: rgba(18, 24, 37, 0.94);
    --surface-soft: #111826;
    --surface-muted: #161e2d;
    --text: #edf1fb;
    --text-soft: #c6cee1;
    --muted: #8994b0;
    --accent: #7e90ff;
    --accent-soft: rgba(126, 144, 255, 0.14);
    --line: rgba(134, 148, 189, 0.18);
}

body {
    background-image:
        radial-gradient(circle at top left, rgba(95, 116, 239, 0.10), transparent 24%),
        radial-gradient(circle at bottom right, rgba(95, 116, 239, 0.08), transparent 20%);
}

.surface-card {
    background: var(--surface);
    border: 1px solid var(--line);
    box-shadow: 0 16px 42px rgba(15, 23, 42, 0.08);
    backdrop-filter: blur(18px);
}

.surface-muted {
    background: var(--surface-muted);
    border: 1px solid var(--line);
}

.nav-link {
    display: inline-flex;
    align-items: center;
    border-radius: 1rem;
    padding: 0.7rem 0.95rem;
    transition: all 0.2s ease;
}

.nav-link:hover,
.nav-link.is-active {
    background: var(--accent-soft);
    color: var(--accent);
}

.btn-primary,
.btn-muted {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #4960dc);
    color: #fff;
    box-shadow: 0 10px 24px rgba(79, 98, 211, 0.22);
}

.btn-muted {
    background: var(--surface-muted);
    border: 1px solid var(--line);
    color: var(--text);
}

.btn-primary:hover,
.btn-muted:hover,
.pill-soft:hover,
.menu-link:hover {
    transform: translateY(-1px);
}

.menu-link {
    display: block;
    border-radius: 1rem;
    padding: 0.7rem 0.85rem;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-soft);
    transition: all 0.2s ease;
}

.menu-link:hover {
    background: var(--surface-muted);
    color: var(--text);
}

.pill-soft {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: var(--surface-muted);
    padding: 0.55rem 0.85rem;
    font-size: 0.76rem;
    font-weight: 800;
    color: var(--muted);
    letter-spacing: 0.01em;
    transition: all 0.2s ease;
}

.footer-title {
    color: var(--muted);
    font-size: 0.73rem;
    font-weight: 800;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.footer-link {
    display: block;
    color: var(--text-soft);
    font-size: 0.95rem;
    font-weight: 600;
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: var(--accent);
}

.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.xf-card,
.auth-card,
.admin-block,
.subpage-header {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 28px;
    box-shadow: 0 16px 42px rgba(15, 23, 42, 0.08);
}

.auth-layout {
    max-width: 56rem;
    margin: 0 auto;
}

.auth-card,
.admin-block,
.subpage-header {
    padding: 1.4rem;
}

.stack-md,
.admin-list {
    display: grid;
    gap: 1rem;
}

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

.admin-layout {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.form-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.section-head,
.inline-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
    justify-content: space-between;
}

.form-field {
    display: grid;
    gap: 0.5rem;
    color: var(--text-soft);
    font-size: 0.9rem;
    font-weight: 700;
}

.form-field input,
.form-field textarea,
.form-field select {
    width: 100%;
    border-radius: 1rem;
    border: 1px solid var(--line);
    background: var(--surface-soft);
    color: var(--text);
    padding: 0.85rem 1rem;
    outline: none;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 1rem;
    padding: 0.8rem 1.2rem;
    font-size: 0.9rem;
    font-weight: 800;
    transition: all 0.2s ease;
}

.button.primary {
    background: linear-gradient(135deg, var(--accent), #4960dc);
    color: #fff;
}

.button.ghost {
    background: var(--surface-muted);
    border: 1px solid var(--line);
    color: var(--text);
}

.button.danger {
    background: #e0576b;
    color: #fff;
}

.button:hover {
    transform: translateY(-1px);
}

.admin-item {
    overflow: hidden;
    border-radius: 1.25rem;
    border: 1px solid var(--line);
    background: var(--surface-soft);
}

.admin-item summary {
    display: flex;
    justify-content: space-between;
    gap: 0.75rem;
    cursor: pointer;
    list-style: none;
    padding: 1rem 1.1rem;
}

.admin-item summary::-webkit-details-marker {
    display: none;
}

.admin-item form,
.admin-inline-delete {
    padding: 0 1.1rem 1.1rem;
}

@media (max-width: 768px) {
    .nav-link {
        padding: 0.62rem 0.78rem;
    }

    .form-grid,
    .admin-layout {
        grid-template-columns: 1fr;
    }
}