:root {
    --admin-primary: #4f46e5;
    --admin-primary-dark: #3730a3;
    --admin-primary-light: #818cf8;
    --admin-accent: #06b6d4;
    --admin-success: #10b981;
    --admin-warning: #f59e0b;
    --admin-danger: #ef4444;
    --admin-sidebar: #0f172a;
    --admin-sidebar-hover: #1e293b;
    --admin-sidebar-active: #312e81;
    --admin-bg: #f1f5f9;
    --admin-card: #ffffff;
    --admin-text: #0f172a;
    --admin-muted: #64748b;
    --admin-border: #e2e8f0;
    --admin-shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 4px 16px rgba(15, 23, 42, 0.06);
    --admin-radius: 12px;
    --admin-sidebar-width: 260px;
}

* { box-sizing: border-box; }

body.admin-body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--admin-bg);
    color: var(--admin-text);
    margin: 0;
    min-height: 100vh;
}

/* ---- Login page ---- */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 40%, #312e81 100%);
    padding: 1.5rem;
}

.login-card {
    background: var(--admin-card);
    border-radius: var(--admin-radius);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
}

.login-brand {
    text-align: center;
    margin-bottom: 2rem;
}

.login-brand-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--admin-primary), var(--admin-accent));
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: #fff;
    margin-bottom: 1rem;
}

.login-brand h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem;
    color: var(--admin-text);
}

.login-brand p {
    color: var(--admin-muted);
    margin: 0;
    font-size: 0.9rem;
}

.login-card .form-label {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--admin-text);
}

.login-card .form-control {
    border-radius: 8px;
    border: 1.5px solid var(--admin-border);
    padding: 0.65rem 0.85rem;
}

.login-card .form-control:focus {
    border-color: var(--admin-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.btn-admin-primary {
    background: linear-gradient(135deg, var(--admin-primary), var(--admin-primary-dark));
    border: none;
    color: #fff;
    font-weight: 600;
    padding: 0.7rem 1.25rem;
    border-radius: 8px;
    transition: transform 0.15s, box-shadow 0.15s;
}

.btn-admin-primary:hover {
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.4);
}

.login-hints {
    margin-top: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--admin-border);
    font-size: 0.8rem;
    color: var(--admin-muted);
    text-align: center;
    line-height: 1.6;
}

.login-hints strong { color: var(--admin-text); }

/* ---- Admin shell ---- */
.admin-shell {
    display: flex;
    min-height: 100vh;
}

.admin-sidebar {
    width: var(--admin-sidebar-width);
    background: var(--admin-sidebar);
    color: #e2e8f0;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    overflow-y: auto;
}

.admin-sidebar-brand {
    padding: 1.5rem 1.25rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.admin-sidebar-brand h5 {
    margin: 0;
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
}

.admin-sidebar-brand small {
    color: #94a3b8;
    font-size: 0.75rem;
}

.admin-nav {
    padding: 1rem 0.75rem;
    flex: 1;
}

.admin-nav-section {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #64748b;
    padding: 0.75rem 0.75rem 0.35rem;
    margin-top: 0.5rem;
}

.admin-nav-link {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.6rem 0.85rem;
    border-radius: 8px;
    color: #cbd5e1;
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: background 0.15s, color 0.15s;
    margin-bottom: 2px;
}

.admin-nav-link:hover {
    background: var(--admin-sidebar-hover);
    color: #fff;
}

.admin-nav-link.active {
    background: var(--admin-sidebar-active);
    color: #fff;
}

.admin-nav-link .nav-icon {
    width: 20px;
    text-align: center;
    opacity: 0.85;
}

.admin-sidebar-footer {
    padding: 1rem 0.75rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.admin-logout-form { margin: 0; }

.btn-admin-logout {
    width: 100%;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #94a3b8;
    padding: 0.55rem;
    border-radius: 8px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.btn-admin-logout:hover {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

/* ---- Main content ---- */
.admin-main {
    margin-left: var(--admin-sidebar-width);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.admin-topbar {
    background: var(--admin-card);
    border-bottom: 1px solid var(--admin-border);
    padding: 1rem 1.75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
}

.admin-topbar h2 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
}

.admin-topbar-meta {
    font-size: 0.85rem;
    color: var(--admin-muted);
}

.admin-content {
    padding: 1.75rem;
    flex: 1;
}

/* ---- Cards & stats ---- */
.admin-stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.25rem;
    margin-top: 1.25rem;
}

.admin-stat-card {
    background: var(--admin-card);
    border-radius: var(--admin-radius);
    padding: 1.35rem;
    box-shadow: var(--admin-shadow);
    border: 1px solid var(--admin-border);
    transition: transform 0.15s;
}

.admin-stat-card:hover {
    transform: translateY(-2px);
}

.admin-stat-card .stat-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--admin-primary);
    line-height: 1.2;
}

.admin-stat-card .stat-label {
    font-size: 0.8rem;
    color: var(--admin-muted);
    margin-top: 0.25rem;
    font-weight: 500;
}

.admin-stat-card.stat-success .stat-value { color: var(--admin-success); }
.admin-stat-card.stat-warning .stat-value { color: var(--admin-warning); }
.admin-stat-card.stat-accent .stat-value { color: var(--admin-accent); }

.admin-card {
    background: var(--admin-card);
    border-radius: var(--admin-radius);
    box-shadow: var(--admin-shadow);
    border: 1px solid var(--admin-border);
    overflow: hidden;
    padding: 1.35rem;
}

.admin-card-title {
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 1rem;
}

.content-editor {
    font-family: inherit;
    line-height: 1.6;
    min-height: 120px;
}

.admin-content-editor .admin-card + .admin-card {
    margin-top: 0;
}

.admin-table th {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--admin-muted);
}

.img-preview, .thumb-preview {
    max-height: 120px;
    max-width: 200px;
    border-radius: 8px;
    border: 1px solid var(--admin-border);
    object-fit: cover;
}

.thumb-preview { max-height: 48px; max-width: 80px; }

.image-preview img { display: block; }

.admin-card-header {
    padding: 1.15rem 1.35rem;
    border-bottom: 1px solid var(--admin-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.admin-card-header h5 {
    margin: 0;
    font-weight: 700;
    font-size: 1rem;
}

.admin-card-body {
    padding: 1.35rem;
}

/* ---- Tables ---- */
.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table thead th {
    background: #f8fafc;
    padding: 0.75rem 1rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--admin-muted);
    border-bottom: 1px solid var(--admin-border);
    text-align: left;
}

.admin-table tbody td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--admin-border);
    font-size: 0.875rem;
    vertical-align: middle;
}

.admin-table tbody tr:hover {
    background: #f8fafc;
}

.admin-table tbody tr:last-child td {
    border-bottom: none;
}

/* ---- Badges ---- */
.badge-admin {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 600;
}

.badge-admin-success { background: #d1fae5; color: #065f46; }
.badge-admin-warning { background: #fef3c7; color: #92400e; }
.badge-admin-muted { background: #f1f5f9; color: #475569; }
.badge-admin-primary { background: #e0e7ff; color: #3730a3; }

/* ---- Buttons ---- */
.btn-admin {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.9rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.15s;
}

.btn-admin-sm { padding: 0.3rem 0.65rem; font-size: 0.8rem; }

.btn-admin-solid {
    background: var(--admin-primary);
    color: #fff;
}

.btn-admin-solid:hover {
    background: var(--admin-primary-dark);
    color: #fff;
}

.btn-admin-outline {
    background: transparent;
    border: 1.5px solid var(--admin-border);
    color: var(--admin-text);
}

.btn-admin-outline:hover {
    border-color: var(--admin-primary);
    color: var(--admin-primary);
}

.btn-admin-danger-outline {
    background: transparent;
    border: 1.5px solid #fecaca;
    color: var(--admin-danger);
}

.btn-admin-danger-outline:hover {
    background: #fef2f2;
}

/* ---- Forms ---- */
.admin-form .form-label {
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 0.35rem;
}

.admin-form .form-control,
.admin-form .form-select {
    border-radius: 8px;
    border: 1.5px solid var(--admin-border);
    padding: 0.6rem 0.85rem;
}

.admin-form .form-control:focus,
.admin-form .form-select:focus {
    border-color: var(--admin-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

/* ---- Alerts ---- */
.admin-alert {
    padding: 0.85rem 1.15rem;
    border-radius: 8px;
    margin-bottom: 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.admin-alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.admin-alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* ---- Platform marketing (shared) ---- */
.hero-platform {
    background: linear-gradient(135deg, #0f172a 0%, #312e81 50%, #4f46e5 100%);
    color: white;
    padding: 5rem 0;
}

.feature-card {
    border: none;
    box-shadow: var(--admin-shadow);
    transition: transform 0.2s;
    border-radius: var(--admin-radius);
}

.feature-card:hover { transform: translateY(-4px); }

.stat-box { text-align: center; padding: 1.5rem; }
.stat-box h3 { color: var(--admin-primary); font-weight: 700; }

.tenant-header { background: var(--tenant-primary, #4f46e5); color: white; }
.campaign-progress { height: 8px; border-radius: 4px; }
.theme-modern { --tenant-primary: #4f46e5; }
.theme-classic { --tenant-primary: #059669; }
.donor-wall-item { border-left: 3px solid var(--admin-primary); padding-left: 1rem; margin-bottom: 0.75rem; }

/* ---- Access denied ---- */
.access-denied-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--admin-bg);
    text-align: center;
    padding: 2rem;
}

.access-denied-page h1 { font-size: 4rem; color: var(--admin-danger); }
.access-denied-page p { color: var(--admin-muted); }

@media (max-width: 768px) {
    .admin-sidebar {
        transform: translateX(-100%);
        transition: transform 0.25s;
    }
    .admin-main { margin-left: 0; }
    .admin-stat-grid { grid-template-columns: 1fr 1fr; }
}