:root {
    --bg-dark: #0b0e14;
    --card-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.1);
    --neon-blue: #00d2ff;
    --neon-purple: #9d50bb;
    --text-white: #ffffff;
}

body {
    margin: 0;
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #0b0e14 0%, #1a1a2e 100%);
    color: var(--text-white);
    min-height: 100vh;
}

/* Glassmorphism Sidebar */
.sidebar {
    width: 260px;
    height: 100vh;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(20px);
    position: fixed;
    left: -260px;
    top: 0;
    transition: 0.5s ease-in-out;
    z-index: 1000;
    border-right: 1px solid var(--glass-border);
}

.sidebar.active { left: 0; }

.sidebar-header {
    padding: 30px;
    text-align: center;
    font-size: 22px;
    font-weight: bold;
    background: linear-gradient(to right, var(--neon-blue), var(--neon-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar a {
    display: flex;
    align-items: center;
    padding: 15px 25px;
    color: #a0aec0;
    text-decoration: none;
    font-size: 15px;
    transition: 0.3s;
}

.sidebar a:hover {
    color: var(--neon-blue);
    background: rgba(255, 255, 255, 0.05);
    box-shadow: inset 5px 0 0 var(--neon-blue);
}

.sidebar i { margin-right: 12px; font-size: 18px; }

/* Main Glass Header */
.main-header {
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.02);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
}

.hamburger {
    font-size: 24px;
    cursor: pointer;
    color: var(--neon-blue);
}

/* Dashboard Cards */
.content { padding: 40px; margin-left: 0; transition: 0.5s; }
.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(5px);
    padding: 25px;
    border-radius: 20px;
    transition: 0.3s;
}

.glass-card:hover {
    border-color: var(--neon-blue);
    transform: translateY(-10px);
    box-shadow: 0 0 20px rgba(0, 210, 255, 0.2);
}