:root {
    /* Colors */
    --bg-dark: #050505;
    --bg-card: #111111;
    --bg-card-hover: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --accent: #ffffff;
    --accent-hover: #e4e4e7;
    --border: rgba(255, 255, 255, 0.1);
    
    /* Typography */
    --font-main: 'Outfit', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    position: relative;
    overflow-x: hidden;
}

#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography */
h1 {
    font-size: clamp(3rem, 5vw, 4.5rem);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 500;
    line-height: 1.2;
    letter-spacing: -0.01em;
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

p {
    color: var(--text-secondary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1.25rem;
    border-radius: 4px;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    font-size: 0.95rem;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--bg-dark);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-large {
    padding: 0.875rem 2rem;
    font-size: 1.125rem;
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.2);
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1.5rem 0;
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-fast);
}

.header.scrolled {
    border-bottom-color: var(--border);
    padding: 1rem 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 600;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: -0.02em;
}

.logo-icon {
    width: 20px;
    height: 20px;
    background: linear-gradient(135deg, #fff, #888);
    border-radius: 50%;
    display: inline-block;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav-links a:hover {
    color: var(--text-primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.link-login {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition-fast);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-content p {
    font-size: 1.125rem;
    margin-bottom: 2.5rem;
    max-width: 480px;
}

.hero-graphic {
    position: relative;
    width: 100%;
    height: 500px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.floating-image {
    width: 100%;
    max-width: 500px;
    height: auto;
    object-fit: contain;
    animation: float 6s ease-in-out infinite;
    filter: drop-shadow(0 0 40px rgba(255, 255, 255, 0.15));
    z-index: 10;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

/* Features Section */
.features {
    padding: 8rem 0;
    background: linear-gradient(to bottom, transparent, rgba(5,5,5,0.95) 20%, rgba(5,5,5,1) 100%);
    position: relative;
    z-index: 1;
}

.features h2 {
    max-width: 600px;
    margin-bottom: 4rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2.5rem;
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.feature-card:hover {
    background-color: var(--bg-card-hover);
    transform: translateY(-5px);
    border-color: rgba(255,255,255,0.2);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    opacity: 0;
    transition: opacity var(--transition-medium);
}

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

/* Feature Icons Custom CSS */
.feature-icon {
    width: 120px;
    height: 120px;
    margin: 0 auto 2rem auto;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Icon 1: Disks */
.icon-disks .disk {
    position: absolute;
    width: 60px;
    height: 25px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    transition: var(--transition-medium);
}
.icon-disks .d1 { top: 20px; z-index: 3; background: rgba(255,255,255,0.8); }
.icon-disks .d2 { top: 40px; z-index: 2; }
.icon-disks .d3 { top: 60px; z-index: 1; }

.feature-card:hover .icon-disks .d1 { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(255,255,255,0.2); }
.feature-card:hover .icon-disks .d2 { transform: translateY(0); }
.feature-card:hover .icon-disks .d3 { transform: translateY(5px); }

/* Icon 2: Nodes */
.icon-nodes {
    position: relative;
}
.icon-nodes .node {
    position: absolute;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    transition: var(--transition-medium);
}
.icon-nodes .n1 { top: 10px; left: 40px; }
.icon-nodes .n2 { top: 60px; left: 10px; }
.icon-nodes .n3 { top: 60px; left: 70px; }

.icon-nodes .connections {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: 0;
}
.feature-card:hover .icon-nodes .node {
    background: rgba(255,255,255,0.2);
    border-color: rgba(255,255,255,0.5);
}
.feature-card:hover .icon-nodes .n1 { background: #fff; }

/* Icon 3: Network */
.icon-network .net-dot {
    position: absolute;
    background: #fff;
    border-radius: 50%;
}
.icon-network .center { width: 12px; height: 12px; top: 54px; left: 54px; }
.icon-network .top { width: 8px; height: 8px; top: 20px; left: 56px; opacity: 0.5; }
.icon-network .bottom { width: 8px; height: 8px; bottom: 20px; left: 56px; opacity: 0.5; }
.icon-network .left { width: 8px; height: 8px; top: 56px; left: 20px; opacity: 0.5; }
.icon-network .right { width: 8px; height: 8px; top: 56px; right: 20px; opacity: 0.5; }

.icon-network .net-line {
    position: absolute;
    background: rgba(255,255,255,0.2);
}
.icon-network .l-top { width: 2px; height: 30px; top: 26px; left: 59px; }
.icon-network .l-bottom { width: 2px; height: 30px; bottom: 26px; left: 59px; }
.icon-network .l-left { width: 30px; height: 2px; top: 59px; left: 26px; }
.icon-network .l-right { width: 30px; height: 2px; top: 59px; right: 26px; }

.feature-card:hover .icon-network .net-dot { opacity: 1; box-shadow: 0 0 10px #fff; }
.feature-card:hover .icon-network .net-line { background: rgba(255,255,255,0.5); }


.feature-card h3 {
    text-align: center;
}

.feature-card p {
    text-align: center;
    font-size: 0.95rem;
}

/* FAQ Section */
.faq {
    padding: 8rem 0;
    background-color: var(--bg-dark); /* Solid background to cover canvas */
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    position: relative;
    z-index: 1;
}

.faq-header {
    text-align: center;
    margin-bottom: 4rem;
}

.faq-header p {
    font-size: 1.125rem;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border);
}

.faq-item:first-child {
    border-top: 1px solid var(--border);
}

.faq-question {
    width: 100%;
    text-align: left;
    padding: 1.5rem 0;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.125rem;
    font-weight: 500;
    font-family: var(--font-main);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: color var(--transition-fast);
}

.faq-question:hover {
    color: var(--accent-hover);
}

.faq-toggle {
    font-size: 1.5rem;
    font-weight: 300;
    transition: transform var(--transition-fast);
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-medium);
}

.faq-answer p {
    padding-bottom: 1.5rem;
}

/* Footer */
.footer {
    padding: 4rem 0;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

/* Responsive */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-content {
        margin: 0 auto;
    }
    
    .hero-content p {
        margin: 0 auto 2.5rem auto;
    }
}

@media (max-width: 768px) {
    .nav-links, .header-actions {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    .features {
        padding: 5rem 0;
    }
    
    .faq {
        padding: 5rem 0;
    }
}