/* Variables - Minimal Gray Theme */
:root {
    --bg-color: #f7f7f7;       /* Very light gray background */
    --surface-color: #ffffff;  /* White cards/surfaces */
    --text-primary: #1a1a1a;   /* Almost black text */
    --text-secondary: #666666; /* Gray text for paragraphs */
    --accent-color: #4a4a4a;   /* Dark gray accent */
    --border-color: #e0e0e0;   /* Light gray border */
    --nav-blur: rgba(247, 247, 247, 0.85);
    
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img, svg {
    max-width: 100%;
    display: block;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

/* Layout */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 80px;
    background: var(--nav-blur);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    display: flex;
    align-items: center;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.05em;
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    z-index: 1001;
}

.mobile-menu-btn span {
    width: 28px;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition);
}

.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background-color: var(--surface-color);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    z-index: 999;
    transition: var(--transition);
}

.mobile-nav.active {
    right: 0;
}

.mobile-link {
    font-size: 2rem;
    font-weight: 800;
}

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

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-title {
    font-size: clamp(3.5rem, 8vw, 6rem);
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.hero-title span {
    color: var(--text-secondary);
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 4px; /* Minimal, not fully rounded */
    cursor: pointer;
    text-align: center;
}

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

.btn-primary:hover {
    background-color: transparent;
    color: var(--text-primary);
}

/* Abstract Background Shape */
.hero-bg-shape {
    position: absolute;
    top: 20%;
    right: 5%;
    width: 40vw;
    height: 40vw;
    background: radial-gradient(circle, rgba(200,200,200,0.5) 0%, rgba(247,247,247,0) 70%);
    z-index: 1;
    border-radius: 50%;
    pointer-events: none;
}

/* Ventures Section */
.ventures-section {
    padding: 8rem 0;
    background-color: var(--surface-color);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.section-header {
    margin-bottom: 4rem;
    max-width: 600px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

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

.venture-card {
    background: var(--bg-color);
    padding: 3rem 2rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition);
}

.venture-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.04);
}

.venture-icon {
    width: 60px;
    height: 60px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.venture-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.venture-card p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.venture-link {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.venture-link span {
    transition: var(--transition);
}

.venture-card:hover .venture-link span {
    transform: translateX(5px);
}

/* About Section */
.about-section {
    padding: 8rem 0;
    background-color: var(--bg-color);
}

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

.about-text h2 {
    font-size: 3rem;
    margin-bottom: 2rem;
}

.about-text p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.about-image .grey-box {
    width: 100%;
    aspect-ratio: 4/3;
    background-color: #e5e5e5;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
}

.about-image .grey-box::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(45deg, transparent 40%, rgba(255,255,255,0.4) 50%, transparent 60%);
    background-size: 200% 200%;
    animation: shimmer 3s infinite linear;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Footer */
.footer {
    background-color: var(--text-primary);
    color: var(--surface-color);
    padding: 6rem 0 2rem;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 3rem;
    margin-bottom: 4rem;
    padding-bottom: 4rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.footer-brand p {
    color: #a0a0a0;
}

.footer-contact h4 {
    margin-bottom: 1rem;
    color: #a0a0a0;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-contact a {
    font-size: 1.5rem;
    font-weight: 300;
}

.footer-contact a:hover {
    color: #a0a0a0;
}

.footer-bottom {
    text-align: center;
    color: #666;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 900px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-menu-btn.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-btn.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .hero-title {
        font-size: 3rem;
    }
}

/* Scroll Animations Base Classes */
.fade-in { opacity: 0; transition: opacity 1s ease-out; }
.fade-in.visible { opacity: 1; }

.fade-in-up { opacity: 0; transform: translateY(30px); transition: all 0.8s ease-out; }
.fade-in-up.visible { opacity: 1; transform: translateY(0); }

.fade-in-left { opacity: 0; transform: translateX(-30px); transition: all 0.8s ease-out; }
.fade-in-left.visible { opacity: 1; transform: translateX(0); }

.fade-in-right { opacity: 0; transform: translateX(30px); transition: all 0.8s ease-out; }
.fade-in-right.visible { opacity: 1; transform: translateX(0); }

.delay-1 { transition-delay: 0.2s; }
.delay-2 { transition-delay: 0.4s; }
.delay-3 { transition-delay: 0.6s; }