:root {
    --bg-color: #0d0f14;
    --sidebar-bg: rgba(18, 22, 29, 0.8);
    --card-bg: rgba(26, 31, 40, 0.6);
    --accent-primary: #6366f1;
    --accent-secondary: #a855f7;
    --text-main: #e2e8f0;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.05);
    --font-family: 'Outfit', sans-serif;
    --sidebar-width: 280px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-family);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
}

/* Background Animation */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(99, 102, 241, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(168, 85, 247, 0.05) 0%, transparent 50%);
    z-index: -1;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    background: var(--sidebar-bg);
    backdrop-filter: blur(12px);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 3rem;
    text-decoration: none;
}

.logo i {
    color: var(--accent-primary);
}

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

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

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 12px;
    transition: var(--transition);
    font-weight: 500;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
}

.nav-link.active {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #fff;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

/* Main Content */
.main {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 4rem;
    max-width: 1200px;
}

/* Content Sections */
.header {
    margin-bottom: 3rem;
}

.header h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #fff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header p {
    font-size: 1.25rem;
    color: var(--text-muted);
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(8px);
    border: 1px solid var(--glass-border);
    padding: 2rem;
    border-radius: 20px;
    margin-bottom: 2rem;
    transition: var(--transition);
}

.card:hover {
    border-color: rgba(99, 102, 241, 0.3);
    transform: translateY(-5px);
}

.card h2 {
    margin-bottom: 1.5rem;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card h2 i {
    color: var(--accent-primary);
}

/* Typography & Lists */
p {
    margin-bottom: 1.25rem;
    color: var(--text-main);
}

ul, ol {
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
    color: var(--text-muted);
}

strong {
    color: #fff;
}

code {
    background: rgba(0, 0, 0, 0.3);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Fira Code', monospace;
    font-size: 0.9em;
    color: var(--accent-primary);
}

/* Alert Boxes */
.alert {
    padding: 1rem 1.5rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    display: flex;
    gap: 1rem;
    align-items: center;
}

.alert-info {
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: #c7d2fe;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #fff;
}

.btn-primary:hover {
    filter: brightness(1.1);
    transform: scale(1.02);
}

/* Responsive */
@media (max-width: 992px) {
    .sidebar {
        width: 80px;
        padding: 2rem 0.5rem;
    }
    .logo span, .nav-link span {
        display: none;
    }
    .logo {
        justify-content: center;
        margin-bottom: 2rem;
    }
    .nav-link {
        justify-content: center;
    }
    .main {
        margin-left: 80px;
    }
}

@media (max-width: 600px) {
    .main {
        padding: 2rem;
    }
    .header h1 {
        font-size: 2rem;
    }
}