:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #10b981;
    --danger: #ef4444;
    --sidebar-width: 260px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-card);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    z-index: 100;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--primary);
}

.nav-links {
    list-style: none;
    flex-grow: 1;
}

.nav-item {
    margin-bottom: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.8rem 1rem;
    text-decoration: none;
    color: var(--text-muted);
    border-radius: 0.75rem;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--primary);
}

.nav-link i {
    font-size: 1.25rem;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    flex-grow: 1;
    padding: 2.5rem;
    max-width: calc(100% - var(--sidebar-width));
}

header {
    margin-bottom: 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-title h1 {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.page-title p {
    color: var(--text-muted);
}

/* Dashboard Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card {
    background-color: var(--bg-card);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.stat-icon {
    width: 48px;
    height: 48px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Tables */
.card {
    background-color: var(--bg-card);
    border-radius: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 1.5rem;
    overflow: hidden;
}

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

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

th {
    text-align: left;
    padding: 1rem;
    color: var(--text-muted);
    font-weight: 600;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

td {
    padding: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

input,
select,
textarea {
    width: 100%;
    background-color: var(--bg-dark);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-main);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    outline: none;
    transition: var(--transition);
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--primary);
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

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

/* Glassmorphism Effect */
.glass {
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

/* Badges & Status */
.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: capitalize;
}

.status-scheduled {
    background: rgba(59, 130, 246, 0.2);
    color: #60a5fa;
}

.status-in-progress,
.status-ongoing {
    background: rgba(245, 158, 11, 0.2);
    color: #fbbf24;
}

.status-completed {
    background: rgba(16, 185, 129, 0.2);
    color: #34d399;
}

.status-cancelled {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
}

.text-accent {
    color: var(--accent);
}

.text-warning {
    color: #f59e0b;
}

.text-danger {
    color: var(--danger);
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        width: 80px;
        padding: 2rem 0.5rem;
    }

    .nav-link span,
    .logo span {
        display: none;
    }

    .main-content {
        margin-left: 80px;
        max-width: calc(100% - 80px);
    }
}