:root {
    --bg-color: #0b0c10;
    --surface-dark: #121318;
    --surface-glass: rgba(22, 23, 30, 0.65);
    --surface-glass-hover: rgba(32, 33, 40, 0.85);
    --border-glass: rgba(255, 255, 255, 0.08);
    --primary: #9d4edd;
    --primary-glow: rgba(157, 78, 221, 0.5);
    --secondary: #00f2fe;
    --secondary-glow: rgba(0, 242, 254, 0.5);
    --text-pure: #ffffff;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    
    --sidebar-width: 280px;
    --nav-height: 70px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    color: var(--text-pure);
    letter-spacing: -0.02em;
}

/* Background Effects */
.bg-mesh {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    background: radial-gradient(circle at 15% 50%, rgba(157, 78, 221, 0.15), transparent 25%),
                radial-gradient(circle at 85% 30%, rgba(0, 242, 254, 0.1), transparent 25%);
}

.bg-mesh::after {
    content: '';
    position: absolute;
    inset: 0;
    background: url('data:image/svg+xml,%3Csvg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg"%3E%3Cfilter id="noiseFilter"%3E%3CfeTurbulence type="fractalNoise" baseFrequency="0.65" numOctaves="3" stitchTiles="stitch"/%3E%3C/filter%3E%3Crect width="100%25" height="100%25" filter="url(%23noiseFilter)" opacity="0.03"/%3E%3C/svg%3E');
    pointer-events: none;
}

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

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: rgba(12, 13, 18, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-glass);
    position: fixed;
    height: 100vh;
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.brand {
    height: var(--nav-height);
    display: flex;
    align-items: center;
    padding: 0 24px;
    border-bottom: 1px solid var(--border-glass);
}

.brand h2 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-pure), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand h2 i {
    color: var(--primary);
    -webkit-text-fill-color: var(--primary);
    filter: drop-shadow(0 0 8px var(--primary-glow));
}

.nav-menu {
    padding: 24px 16px;
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
    /* Hide scrollbar */
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.nav-menu::-webkit-scrollbar {
    display: none;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 18px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 12px;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid transparent;
}

.nav-item i {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
    transition: var(--transition);
}

.nav-item:hover, .nav-item.active {
    background: var(--surface-glass);
    color: var(--text-pure);
    border-color: var(--border-glass);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.nav-item.active {
    background: linear-gradient(90deg, rgba(157, 78, 221, 0.15) 0%, transparent 100%);
    border-left: 3px solid var(--primary);
}

.nav-item.active i {
    color: var(--primary);
    filter: drop-shadow(0 0 5px var(--primary-glow));
}

.nav-group-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #64748b;
    margin: 16px 0 8px 18px;
    font-weight: 600;
}

/* Main Content */
.main-wrapper {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
}

.topbar {
    height: var(--nav-height);
    background: rgba(12, 13, 18, 0.5);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-glass);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    position: sticky;
    top: 0;
    z-index: 90;
}

.breadcrumb {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.breadcrumb span {
    color: var(--text-pure);
}

.topbar-actions {
    display: flex;
    gap: 16px;
}

.action-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--surface-glass);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.action-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    box-shadow: 0 0 15px var(--primary-glow);
}

/* Page Content */
.content-area {
    padding: 40px;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.section {
    display: none;
    animation: fadeIn 0.4s ease-out forwards;
}

.section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Hero Header */
.hero-header {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    padding: 60px 40px;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 1px solid var(--border-glass);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-image: url('assets/hero_bg.png');
    background-size: cover;
    background-position: center;
    opacity: 0.4;
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(11, 12, 16, 0.9) 0%, rgba(11, 12, 16, 0.6) 50%, transparent 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 600px;
}

.badge {
    display: inline-block;
    padding: 6px 12px;
    background: rgba(157, 78, 221, 0.2);
    border: 1px solid var(--primary);
    color: #e2b3ff;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 16px;
    box-shadow: 0 0 10px var(--primary-glow);
}

.hero-content h1 {
    font-size: 2.8rem;
    line-height: 1.2;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #fff, #a5b4fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

/* Cards Grid */
.grid-cols-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.grid-cols-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.glass-card {
    background: var(--surface-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: 20px;
    padding: 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    opacity: 0;
    transition: var(--transition);
}

.glass-card:hover {
    transform: translateY(-5px);
    background: var(--surface-glass-hover);
    box-shadow: 0 15px 35px rgba(0,0,0,0.3);
    border-color: rgba(255, 255, 255, 0.15);
}

.glass-card:hover::before {
    opacity: 1;
}

.card-icon-wrap {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: rgba(157, 78, 221, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    border: 1px solid rgba(157, 78, 221, 0.3);
    color: var(--primary);
    font-size: 1.4rem;
    transition: var(--transition);
}

.glass-card:hover .card-icon-wrap {
    background: var(--primary);
    color: white;
    box-shadow: 0 0 20px var(--primary-glow);
}

.card-icon-wrap.blue {
    background: rgba(0, 242, 254, 0.15);
    border-color: rgba(0, 242, 254, 0.3);
    color: var(--secondary);
}

.glass-card:hover .card-icon-wrap.blue {
    background: var(--secondary);
    color: #0b0c10;
    box-shadow: 0 0 20px var(--secondary-glow);
}

.card-icon-wrap.green {
    background: rgba(16, 185, 129, 0.15);
    border-color: rgba(16, 185, 129, 0.3);
    color: var(--success);
}
.glass-card:hover .card-icon-wrap.green {
    background: var(--success);
    color: white;
    box-shadow: 0 0 20px rgba(16,185,129,0.4);
}

.glass-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.glass-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.feature-list li {
    position: relative;
    padding-left: 28px;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.feature-list li::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    top: 2px;
    font-size: 0.85rem;
    color: var(--primary);
}

.blue-list li::before {
    color: var(--secondary);
}

/* Steps design */
.step-item {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.step-number {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    border-radius: 50%;
    background: rgba(157, 78, 221, 0.2);
    border: 1px solid var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #e2b3ff;
    font-family: 'Outfit', sans-serif;
}

.step-content h4 {
    font-size: 1.1rem;
    margin-bottom: 4px;
    margin-top: 4px;
}

.step-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

.sub-list {
    list-style: none;
    margin-top: 10px;
    padding-left: 14px;
    border-left: 2px solid var(--border-glass);
}
.sub-list li {
    position: relative;
    padding-left: 16px;
    margin-bottom: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}
.sub-list li::before {
    content: '';
    position: absolute;
    left: -2px;
    top: 8px;
    width: 8px;
    height: 2px;
    background: var(--border-glass);
}

/* Section Headings */
.section-title {
    font-size: 2rem;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
}
.section-title i {
    color: var(--primary);
    text-shadow: 0 0 10px var(--primary-glow);
}
.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 40px;
    max-width: 800px;
}

/* Responsive */
@media (max-width: 1024px) {
    :root {
        --sidebar-width: 240px;
    }
    .grid-cols-2 { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .main-wrapper {
        margin-left: 0;
    }
    .content-area {
        padding: 24px;
    }
    .hero-header {
        padding: 40px 24px;
    }
    .hero-content h1 {
        font-size: 2.2rem;
    }
}