:root {
    --bg-base: #030303; --bg-surface: #0a0a0a; --bg-card: rgba(20, 20, 20, 0.7);
    --accent-primary: #00ffcc; --accent-secondary: #7b2cbf;
    --text-main: #ffffff; --text-muted: #888888;
    --font-sans: 'Inter', system-ui, sans-serif; --font-mono: 'Fira Code', monospace;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { background-color: var(--bg-base); color: var(--text-main); font-family: var(--font-sans); line-height: 1.6; overflow-x: hidden; }

/* Grid Background */
.bg-grid {
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; z-index: -2;
    background-image: linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 40px 40px; mask-image: linear-gradient(to bottom, transparent, black, transparent); -webkit-mask-image: linear-gradient(to bottom, transparent, black, transparent);
}

/* Navigation & Mobile Menu */
nav { position: fixed; top: 0; width: 100%; padding: 20px 5%; display: flex; justify-content: space-between; align-items: center; background: rgba(3, 3, 3, 0.9); backdrop-filter: blur(10px); z-index: 1000; border-bottom: 1px solid rgba(255,255,255,0.05); }
.logo { font-family: var(--font-mono); font-size: 1.2rem; font-weight: 700; color: var(--text-main); text-decoration: none; z-index: 1001; }
.logo span { color: var(--accent-primary); }
.nav-links { display: flex; gap: 2rem; }
.nav-links a { color: var(--text-muted); text-decoration: none; font-size: 0.85rem; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 2px; transition: 0.3s; }
.nav-links a:hover, .nav-links a.active { color: var(--accent-primary); }
.menu-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; z-index: 1001; }
.menu-toggle span { width: 25px; height: 2px; background: var(--text-main); transition: 0.3s; }

/* Layouts & Typography */
.fold { padding: 120px 5%; max-width: 1200px; margin: 0 auto; min-height: 80vh; display: flex; flex-direction: column; justify-content: center; }
.fold-short { min-height: auto; padding: 80px 5%; }
.mono-subtitle { font-family: var(--font-mono); color: var(--accent-primary); font-size: 0.9rem; margin-bottom: 1.5rem; }
h1 { font-size: clamp(2.5rem, 6vw, 5rem); line-height: 1.1; margin-bottom: 1.5rem; letter-spacing: -2px; }
h2 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 2rem; letter-spacing: -1px; }
p { color: var(--text-muted); font-size: 1.1rem; max-width: 700px; margin-bottom: 1.5rem; }

/* Grids & Cards */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2.5rem; width: 100%; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; width: 100%; }
.glass-card { background: var(--bg-card); border: 1px solid rgba(255, 255, 255, 0.05); border-radius: 8px; padding: 2.5rem; transition: 0.3s; }
.glass-card:hover { border-color: rgba(0, 255, 204, 0.3); transform: translateY(-5px); }
.glass-card h3 { font-size: 1.5rem; margin-bottom: 1rem; color: #fff; }
.tech-tags { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 1.5rem; }
.tag { background: rgba(0, 255, 204, 0.03); border: 1px solid rgba(0, 255, 204, 0.15); color: var(--accent-primary); padding: 0.4rem 1rem; border-radius: 20px; font-family: var(--font-mono); font-size: 0.75rem; }

/* Buttons */
.btn { display: inline-block; background: transparent; color: var(--text-main); border: 1px solid rgba(255,255,255,0.2); padding: 1rem 2.5rem; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 2px; font-size: 0.85rem; transition: 0.3s; border-radius: 4px; text-decoration: none; white-space: nowrap; }
.btn:hover { background: var(--accent-primary); color: var(--bg-base); border-color: var(--accent-primary); font-weight: bold; }

/* Responsive */
@media (max-width: 768px) {
    .menu-toggle { display: flex; }
    .nav-links { position: fixed; top: 0; left: 0; width: 100%; height: 100vh; background: var(--bg-surface); flex-direction: column; justify-content: center; align-items: center; transform: translateY(-100%); transition: 0.4s ease; z-index: 1000; }
    .nav-links.active { transform: translateY(0); }
    .menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .menu-toggle.active span:nth-child(2) { opacity: 0; }
    .menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .fold { padding: 100px 5% 40px; }
}