:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --input-bg: #ffffff;
    --border-color: #e2e8f0;
    --danger-color: #ef4444;
    --success-color: #22c55e;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    line-height: 1.5;
}

* { box-sizing: border-box; }
a { text-decoration: none; color: inherit; }

.app-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background-color: var(--card-bg);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    z-index: 1000;
}

.brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-muted);
    border-radius: 0.5rem;
    margin-bottom: 0.25rem;
    transition: all 0.2s;
    font-weight: 500;
}

.nav-link:hover, .nav-link.active {
    background-color: #f1f5f9;
    color: var(--primary-color);
}

.main-content {
    flex: 1;
    padding: 2rem;
    width: 100%;
    overflow-x: hidden;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.menu-toggle {
    display: none;
    font-size: 1.75rem;
    cursor: pointer;
    color: var(--text-color);
}

@media (max-width: 1024px) {
    .sidebar {
        position: fixed;
        left: -260px;
        top: 0;
        bottom: 0;
        transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 10px 0 15px -3px rgba(0, 0, 0, 0.1);
    }
    
    .sidebar.active {
        left: 0;
    }

    .menu-toggle {
        display: block;
    }

    .main-content {
        padding: 1rem;
    }

    .header {
        margin-bottom: 1.5rem;
    }

    .stats-grid {
        grid-template-columns: 1fr !important;
    }
    
    .filters-grid {
        grid-template-columns: 1fr !important;
    }
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.table-container {
    background-color: var(--card-bg);
    border-radius: 0.75rem;
    overflow-x: auto;
    border: 1px solid var(--border-color);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    background-color: #f8fafc;
    padding: 0.75rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
    text-align: left;
    white-space: nowrap;
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.875rem;
    white-space: nowrap;
}

.form-input {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 0.875rem;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    background-color: var(--primary-color);
    color: white !important;
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
}

.badge {
    padding: 0.25rem 0.625rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-blue { background-color: #e0e7ff; color: #4338ca; }
.badge-green { background-color: #dcfce7; color: #15803d; }
.badge-red { background-color: #fee2e2; color: #b91c1c; }

/* Login */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f1f5f9;
    padding: 1.5rem;
}

.login-card {
    background: white;
    padding: 2.5rem;
    border-radius: 1rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
}