:root {
    --sidebar-width: 260px;
    --sidebar-bg: #1e1e2d;
    --sidebar-hover: #2a2a3d;
    --sidebar-active-bg: rgba(105,86,235,0.12);
    --accent: #6956eb;
    --accent-light: #8b7cf7;
    --accent-glow: rgba(105,86,235,0.25);
    --card-bg: #ffffff;
    --body-bg: #f0f2f5;
    --text-muted: #6c757d;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.2s ease;
}

* { box-sizing: border-box; }

body {
    background: var(--body-bg);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: #2d3748;
    line-height: 1.6;
    min-height: 100vh;
}

.layout-wrapper {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: #a2a3b7;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 1000;
    transition: var(--transition);
    overflow-y: auto;
}

.sidebar-logo {
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.sidebar-logo .logo-icon {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sidebar-logo .logo-fallback {
    width: 38px;
    height: 38px;
    background: var(--accent);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 800;
    font-size: 1.1rem;
}

.sidebar-logo span {
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
}

.sidebar-nav {
    padding: 12px 0;
    flex: 1;
}

.sidebar-nav .nav-section {
    padding: 8px 24px 4px;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: rgba(255,255,255,0.25);
    font-weight: 600;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 24px;
    color: #9899ac;
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 500;
    transition: var(--transition);
    border-left: 3px solid transparent;
    margin: 2px 12px;
    border-radius: var(--radius-sm);
}

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

.sidebar-nav a.active {
    color: #fff;
    background: var(--sidebar-active-bg);
    border-left-color: var(--accent);
}

.sidebar-nav a svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    opacity: 0.7;
}

.sidebar-nav a:hover svg,
.sidebar-nav a.active svg {
    opacity: 1;
}

.sidebar-footer {
    padding: 16px 24px;
    border-top: 1px solid rgba(255,255,255,0.06);
}

.sidebar-footer a {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #9899ac;
    text-decoration: none;
    font-size: 0.88rem;
    padding: 8px 0;
    transition: var(--transition);
}

.sidebar-footer a:hover {
    color: #f56565;
}

.sidebar-footer .watermark {
    font-size: 0.65rem;
    color: rgba(255,255,255,0.18);
    text-align: center;
    padding: 12px 0 4px;
    letter-spacing: 0.3px;
}

.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 28px 32px;
    min-height: 100vh;
    width: calc(100% - var(--sidebar-width));
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
    flex-wrap: wrap;
    gap: 12px;
}

.page-header h1 {
    font-size: 1.6rem;
    font-weight: 700;
    margin: 0;
    color: #1a202c;
}

.page-header p {
    color: var(--text-muted);
    margin: 4px 0 0;
}

.card {
    background: var(--card-bg);
    border: none;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    background: transparent;
    border-bottom: 1px solid rgba(0,0,0,0.06);
    padding: 18px 24px;
    font-weight: 600;
    font-size: 1rem;
}

.card-body {
    padding: 24px;
}

.stat-card {
    border-radius: var(--radius);
    padding: 24px;
    color: #fff;
    position: relative;
    overflow: hidden;
    border: none;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-card h3 {
    margin: 0;
    font-size: 2rem;
    font-weight: 700;
}

.stat-card p {
    margin: 4px 0 0;
    opacity: 0.85;
    font-size: 0.9rem;
}

.bg-primary-custom { background: #667eea; }
.bg-success-custom { background: #11998e; }
.bg-warning-custom { background: #f5576c; }
.bg-info-custom    { background: #4facfe; }

.btn {
    border-radius: var(--radius-sm);
    font-weight: 600;
    padding: 8px 20px;
    transition: var(--transition);
    font-size: 0.88rem;
}

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

.btn-primary:hover {
    background: #5a4bd8;
    border-color: #5a4bd8;
    box-shadow: 0 4px 15px var(--accent-glow);
    transform: translateY(-1px);
}

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

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

.btn-danger:hover {
    box-shadow: 0 4px 15px rgba(229,62,62,0.3);
    transform: translateY(-1px);
}

.btn-success:hover {
    box-shadow: 0 4px 15px rgba(56,161,105,0.3);
    transform: translateY(-1px);
}

.btn-sm {
    padding: 5px 14px;
    font-size: 0.82rem;
}

.table {
    margin: 0;
    font-size: 0.9rem;
}

.table thead th {
    border-bottom: 2px solid rgba(0,0,0,0.06);
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    font-weight: 700;
    padding: 14px 16px;
}

.table tbody td {
    padding: 14px 16px;
    vertical-align: middle;
    border-bottom: 1px solid rgba(0,0,0,0.04);
}

.table tbody tr {
    transition: var(--transition);
}

.table tbody tr:hover {
    background: rgba(105,86,235,0.03);
}

.form-control, .form-select {
    border-radius: var(--radius-sm);
    border: 1.5px solid #e2e8f0;
    padding: 10px 14px;
    font-size: 0.9rem;
    transition: var(--transition);
    background: #fff;
}

.form-control:focus, .form-select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-label {
    font-weight: 600;
    font-size: 0.85rem;
    color: #4a5568;
    margin-bottom: 6px;
}

.alert {
    border: none;
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    font-weight: 500;
}

.badge {
    font-weight: 600;
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
}

.invoice-paid { color: #11998e; }
.invoice-unpaid { color: #e53e3e; }
.invoice-cancelled { color: #a0aec0; }

.ticket-badge { font-size: 0.8rem; }

.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f0f2f5;
    padding: 20px;
}

.auth-card {
    background: #fff;
    border-radius: 16px;
    padding: 48px 40px 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
}

.auth-card .auth-logo {
    text-align: center;
    margin-bottom: 32px;
}

.auth-card .auth-logo .logo-icon {
    width: 56px;
    height: 56px;
    background: var(--accent);
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 800;
    font-size: 1.4rem;
    margin-bottom: 12px;
}

.auth-card .auth-logo h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    color: #1a202c;
}

.auth-card .auth-logo p {
    color: var(--text-muted);
    margin: 4px 0 0;
    font-size: 0.9rem;
}

.auth-card .form-control {
    background: #f7fafc;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

.fade-in-up {
    animation: fadeInUp 0.4s ease forwards;
}

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(0,0,0,0.15);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0,0,0,0.25);
}

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }
    .main-content {
        margin-left: 0;
        width: 100%;
        padding: 20px;
    }
    .auth-card {
        padding: 32px 24px;
    }
}

.form-check-input:checked {
    background-color: var(--accent);
    border-color: var(--accent);
}

textarea.form-control {
    min-height: 100px;
}

a {
    color: var(--accent);
}

a:hover {
    color: var(--accent-light);
}