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

:root {
    --primary: #1a1f3a;
    --secondary: #0f1419;
    --card-bg: #1e2139;
    --text-primary: #ffffff;
    --text-secondary: #b0b5c0;
    --border: #2d3354;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --purple: #a855f7;
    --sidebar-width: 280px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

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

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: rgba(30, 33, 57, 0.95);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.sidebar {
    position: fixed;
    left: 0;
    top: 70px;
    width: var(--sidebar-width);
    height: calc(100vh - 70px);
    background: var(--primary);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 20px 0;
    z-index: 90;
}

.main-content {
    margin-left: var(--sidebar-width);
    margin-top: 70px;
    flex: 1;
    padding: 30px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 20px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--info) 0%, var(--purple) 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Sidebar */
.sidebar-menu {
    list-style: none;
}

.sidebar-item {
    margin: 0;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.sidebar-link:hover,
.sidebar-link.active {
    color: var(--text-primary);
    background: rgba(168, 85, 247, 0.1);
    border-left-color: var(--purple);
}

.sidebar-submenu {
    list-style: none;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.sidebar-submenu.open {
    max-height: 500px;
}

.sidebar-submenu .sidebar-link {
    padding-left: 40px;
    font-size: 0.9rem;
}

.chevron {
    transition: transform 0.3s ease;
    margin-left: auto;
}

.sidebar-item.open .chevron {
    transform: rotate(180deg);
}

/* Cards */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--purple);
    box-shadow: 0 10px 30px rgba(168, 85, 247, 0.1);
}

.stat-card {
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(168, 85, 247, 0.05) 100%);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.stat-icon {
    width: 50px;
    height: 50px;
    background: rgba(168, 85, 247, 0.2);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--purple);
    font-size: 24px;
}

.stat-value {
    font-size: 24px;
    font-weight: 600;
    color: var(--success);
    margin-top: 10px;
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--info) 0%, var(--purple) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-success:hover {
    background: #16a34a;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-secondary {
    background: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: rgba(168, 85, 247, 0.1);
    border-color: var(--purple);
}

.btn-lg {
    padding: 15px 30px;
    width: 100%;
    justify-content: center;
}

.btn-block {
    width: 100%;
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.table th {
    background: rgba(168, 85, 247, 0.1);
    padding: 15px;
    text-align: left;
    font-weight: 600;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
}

.table td {
    padding: 15px;
    border-bottom: 1px solid var(--border);
}

.table tr:hover {
    background: rgba(168, 85, 247, 0.05);
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 12px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--purple);
    box-shadow: 0 0 10px rgba(168, 85, 247, 0.2);
}

.form-control::placeholder {
    color: var(--text-secondary);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-success {
    background: rgba(34, 197, 94, 0.2);
    color: var(--success);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning);
}

.badge-info {
    background: rgba(59, 130, 246, 0.2);
    color: var(--info);
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 30px;
    font-size: 14px;
}

.breadcrumb a {
    color: var(--info);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.breadcrumb span {
    color: var(--text-secondary);
}

/* Mobile Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
}

.hamburger span {
    width: 24px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(10px, 10px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 200;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 30px;
    max-width: 500px;
    width: 90%;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Alerts */
.alert {
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid var(--warning);
    color: var(--warning);
}

.alert-info {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--info);
    color: var(--info);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        width: 100%;
        max-width: var(--sidebar-width);
        height: calc(100vh - 70px);
    }

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

    .main-content {
        margin-left: 0;
        padding: 20px;
    }

    .hamburger {
        display: flex;
    }

    .header {
        left: 0;
    }

    .grid,
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .btn-lg {
        padding: 12px 20px;
        font-size: 14px;
    }

    .stat-card {
        flex-direction: column;
    }

    .table {
        font-size: 12px;
    }

    .table th,
    .table td {
        padding: 10px;
    }
}

@media (max-width: 480px) {
    .container {
        flex-direction: column;
    }

    .header {
        height: 60px;
        padding: 0 15px;
    }

    .main-content {
        margin-top: 60px;
        padding: 15px;
    }

    .sidebar {
        top: 60px;
        height: calc(100vh - 60px);
    }

    .logo {
        font-size: 16px;
    }

    .logo-icon {
        width: 35px;
        height: 35px;
    }

    .stat-value {
        font-size: 20px;
    }

    .btn {
        padding: 8px 16px;
        font-size: 12px;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

.fade-in {
    animation: fadeIn 0.3s ease;
}

.slide-in-up {
    animation: slideInUp 0.3s ease;
}

/* Utilities */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

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

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.p-20 {
    padding: 20px;
}

.hidden {
    display: none;
}