body {
    background-color: #f8f9fa;
}

.app-shell {
    display: flex;
    min-height: 100vh;
}

.app-sidebar {
    width: 280px;
    flex-shrink: 0;
    display: flex;
    background: #ffffff;
    border-right: 1px solid #d7dbe0;
    position: sticky;
    top: 0;
    height: 100vh;
    box-shadow: 2px 0 10px rgba(15, 23, 42, 0.05);
}

.app-sidebar-rail {
    width: 52px;
    background: #e11d48;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0.4rem;
}

.rail-logo {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.68rem;
    font-weight: 700;
    color: #111827;
    text-decoration: none;
    background: #ffffff;
}

.rail-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.rail-link {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.72rem;
    font-weight: 700;
    color: #ffffff;
    text-decoration: none;
    background: rgba(255, 255, 255, 0.18);
}

.rail-link.active,
.rail-link:hover {
    background: #ffffff;
    color: #be123c;
}

.app-sidebar-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 1rem 0.9rem;
    background: #f8fafc;
}

.app-brand {
    display: block;
    color: #0f172a;
    text-decoration: none;
    font-weight: 700;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.sidebar-section-title {
    font-size: 0.72rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: #6b7280;
    margin: 0.25rem 0 0.6rem;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.sidebar-link {
    display: block;
    text-decoration: none;
    color: #111827;
    font-size: 0.9rem;
    padding: 0.42rem 0.5rem;
    border-radius: 8px;
}

.sidebar-link:hover {
    background: #e5e7eb;
}

.sidebar-link.active {
    background: #dbeafe;
    color: #1e3a8a;
    font-weight: 600;
}

.sidebar-link-icon {
    display: inline-block;
    width: 1.3rem;
    text-align: center;
    margin-right: 0.25rem;
}

.sidebar-group {
    border-radius: 8px;
    padding: 0.1rem 0.2rem;
}

.sidebar-group summary {
    cursor: pointer;
    list-style: none;
    font-size: 0.86rem;
    font-weight: 600;
    color: #374151;
    padding: 0.35rem 0.3rem;
}

.sidebar-group summary::-webkit-details-marker {
    display: none;
}

.sidebar-group[open] {
    background: #f1f5f9;
}

.sidebar-group .sidebar-link {
    margin-left: 0.2rem;
}

.sidebar-footer {
    margin-top: auto;
}

.app-content {
    flex: 1;
    min-width: 0;
}

.app-content-auth {
    padding: 1rem 1.25rem;
}

.planner-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 1rem;
}

.planner-calendar .table td {
    min-width: 170px;
    vertical-align: top;
}

.calendar-slot {
    display: block;
    text-decoration: none;
    border: 1px solid var(--slot-color, #d1d5db);
    border-left: 6px solid var(--slot-color, #d1d5db);
    border-radius: 8px;
    padding: 0.25rem 0.4rem;
    margin-bottom: 0.35rem;
    color: #111827;
    background: color-mix(in srgb, var(--slot-color, #94a3b8) 14%, white);
}

.calendar-slot:hover {
    border-color: var(--slot-color, #60a5fa);
    background: color-mix(in srgb, var(--slot-color, #94a3b8) 22%, white);
}

.calendar-slot.is-booked {
    border-color: var(--slot-color, #fca5a5);
    background: color-mix(in srgb, var(--slot-color, #94a3b8) 28%, white);
}

.calendar-slot.is-active {
    border-color: #2563eb;
    box-shadow: 0 0 0 1px #2563eb;
}

.slot-time {
    font-size: 0.82rem;
    font-weight: 600;
}

.slot-product {
    font-size: 0.74rem;
    font-weight: 600;
}

.slot-state {
    font-size: 0.75rem;
    font-weight: 600;
    color: #b91c1c;
}

.slot-student {
    font-size: 0.78rem;
}

.product-legend-item {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.product-legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: #64748b;
    display: inline-block;
}

.planner-detail-panel {
    border: 1px solid #d1d5db;
    border-radius: 10px;
    background: #ffffff;
    padding: 0.9rem;
}

.detail-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.45rem 0.6rem;
    margin-bottom: 0.7rem;
}

.detail-field.full {
    grid-column: 1 / -1;
}

.detail-field label {
    display: block;
    font-size: 0.72rem;
    color: #6b7280;
    margin-bottom: 0.2rem;
    font-weight: 600;
}

.planner-detail-panel .table th {
    width: 42%;
    font-size: 0.78rem;
    color: #374151;
}

.planner-detail-panel .table td {
    font-size: 0.78rem;
}

.week-slot-summary {
    cursor: pointer;
}

.week-slot-details[open] {
    background: #eef2ff;
}

.card span {
    font-size: 1.5rem;
    font-weight: 700;
}

@media (max-width: 991px) {
    .app-sidebar {
        width: 210px;
    }

    .app-sidebar-rail {
        width: 44px;
    }

    .app-content-auth {
        padding: 0.75rem;
    }

    .planner-layout {
        grid-template-columns: 1fr;
    }
}