:root {
    --primary: #8b5cf6;
    --primary-glow: rgba(139, 92, 246, 0.5);
    --secondary: #ec4899;
    --accent: #06b6d4;
    --dark: #030712;
    --white: #ffffff;
    --glass: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --shadow-3d: 0 20px 50px rgba(0, 0, 0, 0.5), 0 5px 15px rgba(0, 0, 0, 0.5);
    --sidebar-width: 280px;
    --transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--dark);
    color: #e2e8f0;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Futuristic Mesh Background */
.mesh-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-color: #030712;
    background-image: 
        radial-gradient(at 0% 0%, hsla(253,16%,7%,1) 0, transparent 50%), 
        radial-gradient(at 50% 0%, hsla(225,39%,30%,1) 0, transparent 50%), 
        radial-gradient(at 100% 0%, hsla(339,49%,30%,1) 0, transparent 50%),
        radial-gradient(at 0% 100%, hsla(180,100%,10%,1) 0, transparent 50%);
    filter: blur(80px);
    opacity: 0.8;
    animation: gradientMove 20s infinite alternate;
}

@keyframes gradientMove {
    0% { transform: scale(1); }
    100% { transform: scale(1.1); }
}

/* 3D Glass Card */
.glass-3d {
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: var(--shadow-3d);
    transition: var(--transition);
    transform-style: preserve-3d;
    perspective: 1000px;
}

.glass-3d:hover {
    border-color: rgba(139, 92, 246, 0.3);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.7), 0 0 20px var(--primary-glow);
}

/* Sidebar Modern */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    background: rgba(3, 7, 18, 0.8);
    backdrop-filter: blur(15px);
    border-right: 1px solid var(--glass-border);
    padding: 2rem;
    position: fixed;
    z-index: 100;
    overflow-y: auto; /* Memungkinkan scroll vertikal */
    padding-bottom: 5rem; /* Memberikan ruang di bagian bawah */
}

/* Custom Scrollbar untuk Sidebar */
.sidebar::-webkit-scrollbar { width: 5px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.05); border-radius: 10px; }
.sidebar::-webkit-scrollbar-thumb:hover { background: var(--primary); }

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 3rem;
    color: var(--white);
}

.sidebar-logo i {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--accent), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 10px var(--primary-glow));
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 1rem 1.25rem;
    border-radius: 16px;
    color: #94a3b8;
    text-decoration: none;
    margin-bottom: 0.75rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--white);
    transform: translateX(5px);
}

.nav-item.active {
    background: linear-gradient(135deg, var(--primary), #4f46e5);
    color: var(--white);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.3);
}

/* Dashboard Content */
.main-content {
    margin-left: var(--sidebar-width);
    padding: 3rem;
    min-height: 100vh;
}

/* 3D Tilt Effect Simulation */
.tilt-card {
    transition: transform 0.1s;
}

/* Premium Buttons 3D */
.btn-3d {
    background: linear-gradient(135deg, var(--primary), #4f46e5);
    border: none;
    padding: 1rem 2rem;
    border-radius: 16px;
    color: white;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 10px 20px rgba(139, 92, 246, 0.3);
    transition: var(--transition);
}

.btn-3d:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 15px 30px rgba(139, 92, 246, 0.5);
}

.btn-3d:active {
    transform: translateY(1px);
}

/* Custom Checkbox as 3D Switch */
.form-check-input {
    width: 3.5rem;
    height: 1.75rem;
    cursor: pointer;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}

/* Animations */
@keyframes float {
    0% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-10px) rotate(1deg); }
    100% { transform: translateY(0px) rotate(0deg); }
}

.float-animation {
    animation: float 4s ease-in-out infinite;
}

.fade-up {
    animation: fadeInUp 0.8s cubic-bezier(0.23, 1, 0.32, 1) forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}