:root {
    --sky-blue: #00BFFF;
    --brand-red: #D22B2B;
    --dark-orange: #FF8C00;
    --dark-sidebar: #1a1a2e;
    --glass: rgba(255, 255, 255, 0.95);
}

body {
    background-color: #f4f6f9;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow-x: hidden;
}

/* Sidebar */
.sidebar {
    height: 100vh;
    background: var(--dark-sidebar);
    color: white;
    position: fixed;
    top: 0; left: 0;
    width: 250px;
    padding-top: 20px;
    transition: 0.3s;
    z-index: 1000;
}

.sidebar a {
    padding: 15px 25px;
    text-decoration: none;
    font-size: 16px;
    color: #b0b0b0;
    display: block;
    transition: 0.3s;
    border-left: 4px solid transparent;
}

.sidebar a:hover, .sidebar a.active {
    background: rgba(255, 255, 255, 0.1);
    color: var(--sky-blue);
    border-left: 4px solid var(--dark-orange);
}

.brand-title {
    text-align: center;
    font-weight: 800;
    margin-bottom: 30px;
    background: -webkit-linear-gradient(45deg, var(--sky-blue), var(--dark-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Main Content */
.main-content { 
    margin-left: 250px;
    padding: 30px;
}

/* Mobile Responsive */
@media screen and (max-width: 768px) {
    .sidebar { width: 0; padding-top: 60px; }
    .sidebar.open { width: 250px; }
    .main-content { margin-left: 0; }
}

/* Cards & Tables */
.stat-card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}
.stat-card:hover { transform: translateY(-5px); }

.glass-table {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.btn-brand {
    background: var(--dark-orange);
    color: white;
    border: none;
}
.btn-brand:hover { background: var(--brand-red); color: white; }