/* ─── VARIABLES ─── */
:root {
    --bg-primary: #050508;
    --bg-secondary: #0a0a12;
    --bg-card: rgba(255,255,255,0.03);
    --bg-card-hover: rgba(255,255,255,0.06);
    --accent-cyan: #00f0ff;
    --accent-purple: #a855f7;
    --accent-pink: #ec4899;
    --accent-blue: #3b82f6;
    --text-primary: #ffffff;
    --text-secondary: rgba(255,255,255,0.6);
    --text-muted: rgba(255,255,255,0.35);
    --border-subtle: rgba(255,255,255,0.08);
    --border-glow: rgba(0,240,255,0.3);
    --gradient-hero: linear-gradient(135deg, #00f0ff 0%, #a855f7 50%, #ec4899 100%);
    --gradient-card: linear-gradient(135deg, rgba(0,240,255,0.1) 0%, rgba(168,85,247,0.1) 100%);
    --shadow-glow: 0 0 40px rgba(0,240,255,0.15), 0 0 80px rgba(168,85,247,0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

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

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb {
    background: linear-gradient(var(--accent-cyan), var(--accent-purple));
    border-radius: 3px;
}

#particle-canvas {
    position: fixed; top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0; pointer-events: none;
}

/* ─── NAVIGATION ─── */
.nav {
    position: fixed; top: 0; left: 0; right: 0;
    z-index: 1000;
    padding: 1.5rem 3rem;
    display: flex;
    justify-content: space-between; align-items: center;
    background: rgba(5,5,8,0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    transition: all 0.4s ease;
}
.nav.scrolled { padding: 1rem 3rem; background: rgba(5,5,8,0.95); }

.nav-logo {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.5rem; font-weight: 700;
    background: var(--gradient-hero);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em; text-decoration: none;
}

.nav-links {
    display: flex; gap: 2.5rem; list-style: none;
}
.nav-links a {
    color: var(--text-secondary); text-decoration: none;
    font-size: 0.9rem; font-weight: 500;
    letter-spacing: 0.05em; text-transform: uppercase;
    position: relative; transition: color 0.3s ease;
}
.nav-links a::after {
    content: ''; position: absolute; bottom: -6px; left: 0;
    width: 0; height: 2px; background: var(--gradient-hero);
    transition: width 0.3s ease;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }

.nav-cta {
    padding: 0.6rem 1.5rem;
    background: var(--gradient-hero); border: none; border-radius: 50px;
    color: var(--bg-primary); font-family: 'Inter', sans-serif;
    font-weight: 600; font-size: 0.85rem; cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); }

.mobile-menu-btn {
    display: none; background: none; border: none;
    color: var(--text-primary); font-size: 1.5rem; cursor: pointer;
}

/* ─── SECTION BASE ─── */
.section {
    position: relative; z-index: 1;
    padding: 8rem 2rem;
    max-width: 1200px; margin: 0 auto;
}

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

.section-label {
    display: inline-block; padding: 0.4rem 1rem;
    background: var(--bg-card); border: 1px solid var(--border-subtle);
    border-radius: 50px; font-size: 0.75rem; font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.15em;
    color: var(--accent-cyan); margin-bottom: 1rem;
}

.section-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(2rem, 4vw, 3rem); font-weight: 700;
    letter-spacing: -0.02em; margin-bottom: 1rem;
}

.section-desc {
    color: var(--text-secondary); max-width: 600px;
    margin: 0 auto; font-size: 1.1rem;
}

.gradient-text {
    background: var(--gradient-hero);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ─── BUTTONS ─── */
.btn-primary {
    padding: 1rem 2.5rem;
    background: var(--gradient-hero); border: none; border-radius: 50px;
    color: var(--bg-primary); font-family: 'Inter', sans-serif;
    font-weight: 600; font-size: 1rem; cursor: pointer;
    transition: all 0.4s ease; display: inline-block; text-decoration: none;
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: var(--shadow-glow); }

.btn-secondary {
    padding: 1rem 2.5rem;
    background: transparent; border: 1px solid var(--border-subtle);
    border-radius: 50px; color: var(--text-primary);
    font-family: 'Inter', sans-serif; font-weight: 600; font-size: 1rem;
    cursor: pointer; transition: all 0.4s ease;
    display: inline-block; text-decoration: none;
}
.btn-secondary:hover {
    border-color: var(--accent-cyan);
    background: rgba(0,240,255,0.05);
    transform: translateY(-3px);
}

/* ─── CARDS ─── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 24px;
    padding: 2.5rem;
    position: relative; overflow: hidden;
    transition: all 0.5s ease;
}
.card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0;
    height: 2px; background: var(--gradient-hero);
    transform: scaleX(0); transition: transform 0.4s ease;
}
.card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-glow);
    transform: translateY(-8px);
    box-shadow: var(--shadow-glow);
}
.card:hover::before { transform: scaleX(1); }

/* ─── FOOTER ─── */
.footer {
    text-align: center; padding: 3rem 2rem;
    border-top: 1px solid var(--border-subtle);
    color: var(--text-muted); font-size: 0.85rem;
}
.footer-brand {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.2rem; font-weight: 700;
    background: var(--gradient-hero);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text; margin-bottom: 1rem;
}

/* ─── REVEAL ANIMATION ─── */
.reveal {
    opacity: 0; transform: translateY(40px);
    transition: all 0.8s ease;
}
.reveal.active { opacity: 1; transform: translateY(0); }

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
    .nav { padding: 1rem 1.5rem; }
    .nav-links { display: none; }
    .mobile-menu-btn { display: block; }
    .section { padding: 4rem 1.5rem; }
}