:root {
    --bg: #f4f6fb;
    --surface: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --border: #e5e7eb;
    --danger: #dc2626;
    --success: #059669;
    --warning: #d97706;
    --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
    --radius: 12px;
    --sidebar-width: 260px;
}

* { box-sizing: border-box; }

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

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.auth-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #dbeafe 0%, #eef2ff 50%, #f8fafc 100%);
    padding: 1.5rem;
}

.auth-wrapper { width: 100%; max-width: 420px; }

.auth-card {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 2rem;
}

.auth-brand h1 {
    margin: 0 0 0.25rem;
    font-size: 1.6rem;
}

.auth-subtitle { color: var(--muted); margin: 0 0 1.5rem; }

.auth-form .form-field { margin-bottom: 1rem; }

.auth-footer-link { text-align: center; margin-top: 1rem; }

label { display: block; font-weight: 600; margin-bottom: 0.35rem; font-size: 0.9rem; }

input, select, textarea {
    width: 100%;
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font: inherit;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1rem;
    border-radius: 8px;
    border: 1px solid transparent;
    font-weight: 600;
    cursor: pointer;
    background: var(--surface);
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { border-color: var(--border); color: var(--text); }
.btn-block { width: 100%; }

.admin-body { min-height: 100vh; }

.admin-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 30;
}

.admin-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: 0;
    padding: 0.4rem;
    cursor: pointer;
}

.admin-menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
}

.admin-header-brand a { font-weight: 700; color: var(--text); text-decoration: none; }
.admin-header-sub { color: var(--muted); margin-left: 0.5rem; font-size: 0.9rem; }

.admin-user-menu { margin-left: auto; position: relative; }

.admin-user-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: none;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.25rem 0.6rem 0.25rem 0.25rem;
    cursor: pointer;
}

.admin-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.admin-user-label { display: flex; flex-direction: column; text-align: left; line-height: 1.2; }
.admin-user-label small { color: var(--muted); font-weight: 400; }

.admin-user-dropdown {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 0.4rem);
    min-width: 220px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 0.5rem;
}

.admin-user-menu.is-open .admin-user-dropdown { display: block; }

.admin-user-dropdown a,
.admin-user-dropdown form { display: block; padding: 0.5rem 0.75rem; }

.link-button {
    background: none;
    border: 0;
    color: var(--primary);
    cursor: pointer;
    padding: 0;
    font: inherit;
}

.admin-shell { display: flex; min-height: calc(100vh - 56px); }

.admin-sidebar {
    width: var(--sidebar-width);
    background: #111827;
    color: #e5e7eb;
    padding: 1rem 0.75rem;
    flex-shrink: 0;
}

.admin-nav-link {
    display: block;
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    color: #e5e7eb;
    margin-bottom: 0.15rem;
}

.admin-nav-link:hover,
.admin-nav-link.is-active { background: rgba(255,255,255,0.12); text-decoration: none; }

.admin-nav-group-title {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #9ca3af;
    margin: 0.75rem 0.35rem 0.35rem;
}

.admin-main { flex: 1; padding: 1.25rem; min-width: 0; }

.admin-page h1 { margin-top: 0; }

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

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

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.dash-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    box-shadow: var(--shadow);
}

.dash-value { font-size: 2rem; font-weight: 700; margin: 0.25rem 0; }
.dash-value-sm { font-size: 1rem; }

.table-wrap { overflow-x: auto; }

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
    border-radius: var(--radius);
    overflow: hidden;
}

.data-table th,
.data-table td {
    padding: 0.65rem 0.75rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

.data-table th { background: #f9fafb; font-size: 0.85rem; }

.table-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; align-items: center; }
.inline-form { display: inline; }

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1rem;
}

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

.form-actions { display: flex; gap: 0.75rem; margin-top: 1rem; }

.permissions-section { margin-top: 1.5rem; border-top: 1px solid var(--border); padding-top: 1rem; }

.flash-messages { margin-bottom: 1rem; }
.flash { padding: 0.75rem 1rem; border-radius: 8px; margin-bottom: 0.5rem; }
.flash-success { background: #ecfdf5; color: var(--success); }
.flash-error { background: #fef2f2; color: var(--danger); }
.flash-warning { background: #fffbeb; color: var(--warning); }
.flash-info { background: #eff6ff; color: var(--primary); }

.muted { color: var(--muted); }

.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
    align-items: center;
}

.filter-bar input,
.filter-bar select {
    padding: 0.4rem 0.6rem;
    border: 1px solid var(--border);
    border-radius: 6px;
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.detail-block { margin-bottom: 1.5rem; }

.comment-list,
.history-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.comment-list li,
.history-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
}

.badge {
    display: inline-block;
    font-size: 0.7rem;
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    background: #e5e7eb;
    margin-left: 0.35rem;
}

.audit-details {
    max-width: 280px;
    max-height: 120px;
    overflow: auto;
    font-size: 0.75rem;
    white-space: pre-wrap;
    margin: 0;
    background: #f9fafb;
    padding: 0.35rem;
    border-radius: 6px;
}

.admin-sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.45);
    z-index: 20;
}

@media (max-width: 900px) {
    .admin-menu-toggle { display: flex; }

    .admin-sidebar {
        position: fixed;
        left: 0;
        top: 56px;
        bottom: 0;
        z-index: 25;
        transform: translateX(-100%);
        transition: transform 0.2s ease;
    }

    .admin-sidebar.is-open { transform: translateX(0); }

    .admin-sidebar-backdrop.is-visible { display: block; }
}