:root {
    --bg-primary: #080b12;
    --bg-secondary: #0e1219;
    --bg-card: #121820;
    --bg-card-hover: #161d28;
    --border: #1c2333;
    --border-light: #253045;
    --accent: #6366f1;
    --accent-dim: rgba(99, 102, 241, 0.12);
    --accent-glow: rgba(99, 102, 241, 0.35);
    --text-primary: #e2e8f0;
    --text-secondary: #8b95a8;
    --text-muted: #525d72;
    --green: #10b981;
    --green-dim: rgba(16, 185, 129, 0.15);
    --red: #ef4444;
    --red-dim: rgba(239, 68, 68, 0.15);
    --yellow: #f59e0b;
    --yellow-dim: rgba(245, 158, 11, 0.15);
    --purple: #8b5cf6;
    --purple-dim: rgba(139, 92, 246, 0.15);
}

body.light {
    --bg-primary: #f3f5f8;
    --bg-secondary: #e8ecf1;
    --bg-card: #ffffff;
    --bg-card-hover: #f0f2f5;
    --border: #d5dae2;
    --border-light: #bfc7d1;
    --accent: #4f46e5;
    --accent-dim: rgba(79, 70, 229, 0.10);
    --accent-glow: rgba(79, 70, 229, 0.25);
    --text-primary: #1a2030;
    --text-secondary: #4a5568;
    --text-muted: #8895a7;
    --green: #059669;
    --green-dim: rgba(5, 150, 105, 0.12);
    --red: #dc2626;
    --red-dim: rgba(220, 38, 38, 0.10);
    --yellow: #d97706;
    --yellow-dim: rgba(217, 119, 6, 0.10);
    --purple: #7c3aed;
    --purple-dim: rgba(124, 58, 237, 0.10);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.9rem;
    line-height: 1.6;
    min-height: 100vh;
}

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

/* Layout */
.app-layout { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar {
    width: 240px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
}

.sidebar-brand {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
}

.brand-text {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--accent);
}

.sidebar-nav {
    flex: 1;
    padding: 0.5rem 0;
    overflow-y: auto;
}

.nav-section {
    padding: 1rem 1.5rem 0.25rem;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.5rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: all 0.15s;
}

.nav-item:hover {
    color: var(--text-primary);
    background: var(--accent-dim);
    text-decoration: none;
}

.nav-item.active {
    color: var(--accent);
    background: var(--accent-dim);
    border-right: 2px solid var(--accent);
}

.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }

.sidebar-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Main content */
.main-content {
    flex: 1;
    margin-left: 240px;
    min-height: 100vh;
}

/* Topbar */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 2rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar-left { display: flex; align-items: center; gap: 1rem; }
.topbar-right { display: flex; align-items: center; gap: 1rem; }

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
}

.mobile-toggle svg { width: 24px; height: 24px; }

.breadcrumb { font-size: 0.85rem; color: var(--text-secondary); }
.breadcrumb a { color: var(--text-muted); }
.breadcrumb .sep { margin: 0 0.35rem; color: var(--text-muted); }

.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.35rem;
    display: flex;
    align-items: center;
}

.theme-toggle svg { width: 16px; height: 16px; }

.user-menu {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
}

.user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--accent-dim);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Page content */
.page-content { padding: 1.5rem 2rem; }

.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    gap: 1rem;
}

.page-header h1 { font-size: 1.4rem; font-weight: 600; }

.header-actions { display: flex; gap: 0.5rem; align-items: center; }

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid var(--border);
}

.card-header h2, .card-header h3 { font-size: 0.9rem; font-weight: 600; }

.card-body { padding: 1.25rem; }

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.25rem;
    text-align: center;
}

.stat-value { font-size: 2rem; font-weight: 700; color: var(--accent); }
.stat-label { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.25rem; }

/* Lists */
.list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
    gap: 1rem;
}

.list-item:last-child { border-bottom: none; }

.list-item-link {
    text-decoration: none;
    color: inherit;
    padding: 0.75rem 1rem;
    margin: 0 -1.25rem;
    border-radius: 0;
    transition: background 0.15s;
}

.list-item-link:first-child { border-radius: 8px 8px 0 0; }
.list-item-link:last-child { border-radius: 0 0 8px 8px; }

.list-item-link:hover {
    background: var(--bg-card-hover);
    text-decoration: none;
}

.list-item-main { flex: 1; min-width: 0; }
.list-item-meta { display: flex; align-items: center; gap: 0.75rem; flex-shrink: 0; }

/* Badges */
.badge {
    display: inline-block;
    padding: 0.15rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
}

.badge-lg { padding: 0.3rem 0.8rem; font-size: 0.85rem; }
.badge-sm { padding: 0.1rem 0.4rem; font-size: 0.7rem; }

.badge-accent { background: var(--accent-dim); color: var(--accent); }
.badge-green { background: var(--green-dim); color: var(--green); }
.badge-red { background: var(--red-dim); color: var(--red); }
.badge-yellow { background: var(--yellow-dim); color: var(--yellow); }
.badge-purple { background: var(--purple-dim); color: var(--purple); }
.badge-muted { background: var(--bg-card-hover); color: var(--text-muted); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s;
    background: var(--bg-card);
    color: var(--text-primary);
}

.btn:hover { background: var(--bg-card-hover); text-decoration: none; }

.btn-primary {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.btn-primary:hover { opacity: 0.9; color: #fff; }

.btn-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover { background: var(--accent-dim); color: var(--accent); }

.btn-danger { color: var(--red); }
.btn-danger:hover { background: var(--red-dim); }

.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.8rem; }

/* Forms */
.form-group { margin-bottom: 0.75rem; }

.form-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.3rem;
}

.form-input {
    width: 100%;
    padding: 0.5rem 0.75rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.85rem;
    font-family: inherit;
    transition: border-color 0.15s;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-dim);
}

.form-input-sm { padding: 0.3rem 0.5rem; font-size: 0.8rem; }

.form-checkbox { width: auto; }

/* Style Django-rendered inputs inside form-group */
.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group input[type="url"],
.form-group input[type="tel"],
.form-group input[type="date"],
.form-group input[type="datetime-local"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.5rem 0.75rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.85rem;
    font-family: inherit;
    transition: border-color 0.15s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-dim);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0.75rem;
}

.form-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border);
}

.form-error { color: var(--red); font-size: 0.8rem; }
.form-help { color: var(--text-muted); font-size: 0.8rem; }

textarea.form-input { resize: vertical; min-height: 80px; }
textarea.mono { font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace; font-size: 0.82rem; }

/* Detail layout */
.detail-grid {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 1.5rem;
}

.detail-pairs { display: grid; gap: 0.5rem; }

.detail-pair {
    display: flex;
    gap: 1rem;
    padding: 0.35rem 0;
    border-bottom: 1px solid var(--border);
}

.detail-pair:last-child { border-bottom: none; }
.detail-key { color: var(--text-muted); font-size: 0.82rem; min-width: 90px; flex-shrink: 0; }

/* Status bar */
.status-bar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.status-form { display: flex; align-items: center; gap: 0.5rem; }
.status-form select { width: auto; min-width: 150px; }

/* Timeline */
.timeline-item {
    display: flex;
    gap: 1rem;
    padding: 0.65rem 0;
    border-bottom: 1px solid var(--border);
}

.timeline-item:last-child { border-bottom: none; }
.timeline-date { color: var(--text-muted); font-size: 0.8rem; min-width: 120px; flex-shrink: 0; }

/* Filter bar */
.filters-bar { margin-bottom: 1rem; }

.filter-form {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
}

/* Description text */
.description-text {
    line-height: 1.7;
    color: var(--text-secondary);
}

.description-text.mono {
    font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
    font-size: 0.82rem;
    white-space: pre-wrap;
}

/* Status dot */
.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    display: inline-block;
}

.status-dot.green { background: var(--green); box-shadow: 0 0 4px var(--green); }

/* Messages */
.messages {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.message {
    padding: 0.65rem 1rem;
    border-radius: 6px;
    font-size: 0.85rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
}

.message.success { border-color: var(--green); color: var(--green); }
.message.error { border-color: var(--red); color: var(--red); }
.message.warning { border-color: var(--yellow); color: var(--yellow); }

/* Empty state */
.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
}

.empty-state .btn { margin-top: 1rem; }

/* Text helpers */
.text-muted { color: var(--text-muted); }

/* Login */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--bg-primary);
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2.5rem;
    width: 100%;
    max-width: 380px;
}

.login-title {
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--accent);
    text-align: center;
}

.login-subtitle {
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .mobile-toggle { display: block; }
    .topbar { padding: 0.75rem 1rem; }
    .page-content { padding: 1rem; }
    .detail-grid { grid-template-columns: 1fr; }
    .page-header { flex-direction: column; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}