/* =========================================
   1. CORE & RESET
   ========================================= */
:root {
    --bg-body: #0a0a0a; /* Dark Premium Theme */
    --text-main: #ffffff;
    --text-muted: #a0a0a0;
    --accent: #3b82f6; /* Subtle tech blue */
    --glass: rgba(255, 255, 255, 0.05);
    --border: rgba(255, 255, 255, 0.1);
    
    --container: 1400px; /* Wider for premium feel */
    --space-section: 120px;
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html { scroll-behavior: smooth; }

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

a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; }

/* =========================================
   2. LAYOUT UTILITIES (Fixes "Collapsed" Look)
   ========================================= */
.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
}

.section { padding: var(--space-section) 0; position: relative; }

/* Auto-Grid: Prevents stacking. Fills space automatically. */
.grid {
    display: grid;
    gap: 2rem;
}

/* Specific Layouts */
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }

/* Desktop Expansions */
@media (min-width: 1024px) {
    .grid-2 { grid-template-columns: 1fr 1fr; align-items: center; }
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
    .grid-4 { grid-template-columns: repeat(4, 1fr); }
    
    /* Force Hero to be wide */
    .hero-wrapper {
        display: grid;
        grid-template-columns: 1.2fr 0.8fr;
        height: 100vh;
        align-items: center;
    }
}

/* =========================================
   3. TYPOGRAPHY
   ========================================= */
h1, h2, h3 { line-height: 1.1; letter-spacing: -0.02em; }

h1 { font-size: clamp(3rem, 6vw, 5.5rem); font-weight: 800; }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); margin-bottom: 2rem; }
h3 { font-size: 1.5rem; margin-bottom: 0.5rem; }
p { color: var(--text-muted); font-size: 1.1rem; }

/* =========================================
   4. COMPONENT: GLASS HEADER
   ========================================= */
.site-header {
    position: fixed;
    top: 0; left: 0; width: 100%;
    z-index: 100;
    padding: 1.5rem 0;
    transition: all 0.4s var(--ease);
    border-bottom: 1px solid transparent;
}

.site-header.scrolled {
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(12px);
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
}

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

.logo { font-size: 1.5rem; font-weight: 700; letter-spacing: -1px; }

.desktop-nav { display: none; gap: 2rem; align-items: center; }
.desktop-nav a { font-size: 0.95rem; font-weight: 500; }
.desktop-nav a:hover { color: var(--accent); }

@media (min-width: 1024px) {
    .desktop-nav { display: flex; }
    .menu-toggle { display: none; }
}

/* Mobile Toggle */
.menu-toggle { font-size: 1.5rem; cursor: pointer; }

/* =========================================
   5. COMPONENT: CARDS & BUTTONS
   ========================================= */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    background: white;
    color: black;
    font-weight: 600;
    border-radius: 4px;
    transform: translateY(0);
}
.btn:hover { transform: translateY(-3px); box-shadow: 0 10px 20px rgba(255,255,255,0.1); }
.btn-outline { background: transparent; color: white; border: 1px solid var(--border); margin-left: 1rem; }
.btn-outline:hover { border-color: white; }

.card {
    background: var(--glass);
    border: 1px solid var(--border);
    padding: 2.5rem;
    border-radius: 12px;
    transition: 0.4s var(--ease);
}

.card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-10px);
    border-color: rgba(255, 255, 255, 0.3);
}

/* =========================================
   6. ANIMATIONS
   ========================================= */
.fade-in-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.visible { opacity: 1; transform: translateY(0); }

/* Stagger Delays */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* Abstract Shape Animation */
.gradient-blob {
    width: 400px; height: 400px;
    background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
    opacity: 0.2;
    filter: blur(60px);
    position: absolute;
    z-index: -1;
    animation: float 10s infinite alternate;
}
@keyframes float { 0% { transform: translate(0,0); } 100% { transform: translate(50px, -50px); } }

/* Mobile Menu */
.mobile-menu {
    position: fixed; top: 0; right: 0;
    width: 100%; height: 100vh;
    background: var(--bg-body);
    display: flex; flex-direction: column;
    justify-content: center; align-items: center;
    transform: translateX(100%);
    transition: 0.5s var(--ease);
    z-index: 99;
}
.mobile-menu.active { transform: translateX(0); }
.mobile-menu a { font-size: 2rem; margin-bottom: 2rem; }