/* --- 1. Base Variables --- */
:root {
    --bg-main: #050505;
    --bg-sec: #0a0a0a; /* 약간 더 밝은 배경 */
    --text-white: #ffffff;
    --text-gray: #9ca3af;
    --accent: #3b82f6; /* Electric Blue */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --font-main: 'Inter', sans-serif;
    --font-logo: 'Orbitron', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    background-color: var(--bg-main); color: var(--text-white);
    font-family: var(--font-main); line-height: 1.7; overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; }

/* --- 2. Ambient Glow --- */
.ambient-glow {
    position: fixed; top: -50%; left: -50%; width: 200%; height: 200%;
    background: radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.06), transparent 50%);
    z-index: -1; pointer-events: none;
}

/* --- 3. Navbar (Simplified) --- */
.navbar {
    position: fixed; top: 0; width: 100%; height: 80px; z-index: 1000;
    background: linear-gradient(to bottom, rgba(0,0,0,0.9), transparent);
    display: flex; align-items: center;
}
.nav-inner {
    width: 100%; max-width: 1400px; margin: 0 auto; padding: 0 40px;
    display: flex; justify-content: space-between; align-items: center;
}
.logo { font-family: var(--font-logo); font-size: 1.5rem; letter-spacing: 2px; color: white; }
.nav-links { display: flex; gap: 40px; }
.nav-links a { font-size: 0.95rem; color: rgba(255,255,255,0.7); font-weight: 500; }
.nav-links a:hover { color: white; text-shadow: 0 0 10px rgba(255,255,255,0.5); }
.btn-glass-nav {
    padding: 10px 24px; border-radius: 50px; background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.3); font-size: 0.85rem; font-weight: 600;
    backdrop-filter: blur(5px);
}
.btn-glass-nav:hover { background: white; color: black; }

/* --- 4. Hero Section --- */
.hero {
    position: relative; height: 100vh; width: 100%;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    text-align: center; overflow: hidden;
}
.video-bg { position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 0; }
.video-bg video { width: 100%; height: 100%; object-fit: cover; }
.overlay { position: absolute; inset: 0; background: radial-gradient(circle, rgba(0,0,0,0.2) 0%, rgba(0,0,0,0.8) 100%); }

.hero-content { position: relative; z-index: 2; max-width: 1000px; padding: 0 20px; }
.pill-badge {
    display: inline-block; padding: 6px 16px; border-radius: 50px;
    background: rgba(0, 0, 0, 0.6); border: 1px solid rgba(255, 255, 255, 0.3);
    color: #fff; font-size: 0.8rem; font-weight: 600; margin-bottom: 30px; letter-spacing: 1px;
}
.hero-content h1 {
    font-size: 6rem; font-weight: 800; line-height: 1.1; margin-bottom: 24px; letter-spacing: -2px;
}
.highlight {
    background: linear-gradient(135deg, #fff 0%, #3b82f6 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-content p {
    font-size: 1.4rem; color: rgba(255,255,255,0.9); margin-bottom: 50px; font-weight: 300;
}
.hero-btns { display: flex; gap: 20px; justify-content: center; }
.btn-primary {
    background: var(--accent); color: white; padding: 16px 40px; border-radius: 50px;
    font-weight: 700; font-size: 1.1rem; border: none; transition: 0.3s;
}
.btn-primary:hover { background: #2563eb; transform: scale(1.05); box-shadow: 0 0 40px rgba(59, 130, 246, 0.6); }

.scroll-indicator {
    position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%);
    color: rgba(255,255,255,0.5); font-size: 0.9rem; display: flex; flex-direction: column; align-items: center; gap: 10px;
    animation: bounce 2s infinite; z-index: 2;
}
@keyframes bounce { 0%, 20%, 50%, 80%, 100% {transform: translateX(-50%) translateY(0);} 40% {transform: translateX(-50%) translateY(-10px);} 60% {transform: translateX(-50%) translateY(-5px);} }

/* --- 5. Feature Deep Dive (Long Scroll) --- */
.feature-row { padding: 150px 0; border-top: 1px solid var(--glass-border); }
.section-black { background-color: #000; }
.section-dark { background-color: var(--bg-main); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 40px; }

.row-layout { display: flex; align-items: center; gap: 80px; }
.row-layout.reverse { flex-direction: row-reverse; }

.text-col { flex: 1; }
.tag { color: var(--accent); font-weight: 800; font-size: 0.9rem; letter-spacing: 2px; margin-bottom: 20px; display: block; }
.text-col h2 { font-size: 3.5rem; line-height: 1.1; margin-bottom: 30px; font-weight: 700; }
.text-col p { font-size: 1.2rem; color: var(--text-gray); margin-bottom: 40px; }
.check-list li { display: flex; gap: 15px; margin-bottom: 10px; color: #ddd; font-size: 1.1rem; }
.check-list i { color: var(--accent); }
.link-arrow { color: white; font-weight: 600; font-size: 1.1rem; border-bottom: 1px solid var(--accent); }

.img-col { flex: 1; }
.glass-frame {
    padding: 10px; background: rgba(255,255,255,0.05); border: 1px solid var(--glass-border);
    border-radius: 12px; position: relative;
}
.glass-frame img { width: 100%; border-radius: 8px; display: block; opacity: 0.9; }

/* AI Terminal Look */
.terminal-mini {
    background: #111; padding: 20px; border-radius: 8px; font-family: monospace; font-size: 0.95rem; border: 1px solid #333;
}
.cmd { color: #fff; margin-bottom: 10px; }
.res { color: #4ade80; }
.ai-glow {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    width: 200px; height: 200px; background: var(--accent); filter: blur(100px); opacity: 0.2; pointer-events: none;
}

/* Code Editor Look */
.code-editor-mockup {
    background: #1e1e1e; border-radius: 8px; border: 1px solid #333; overflow: hidden;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}
.editor-head { background: #252526; padding: 10px 15px; font-family: monospace; font-size: 0.8rem; color: #aaa; display: flex; gap: 8px; align-items: center; }
.dot { width: 10px; height: 10px; border-radius: 50%; }
.r { background: #ff5f56; } .y { background: #ffbd2e; } .g { background: #27c93f; }
.editor-body { padding: 20px; font-family: 'Consolas', monospace; font-size: 0.9rem; color: #d4d4d4; line-height: 1.5; }
.k { color: #569cd6; } .f { color: #dcdcaa; } .v { color: #9cdcfe; } .s { color: #ce9178; } .c { color: #6a9955; }

/* --- 6. Technical Specs --- */
.specs-section { padding: 120px 0; border-top: 1px solid var(--glass-border); }
.section-head-center { text-align: center; margin-bottom: 80px; }
.section-head-center h2 { font-size: 3rem; margin-bottom: 10px; }
.section-head-center p { color: var(--text-gray); font-size: 1.2rem; }

.specs-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.spec-card {
    background: var(--glass-bg); border: 1px solid var(--glass-border); padding: 30px;
    border-radius: 12px; text-align: center; transition: 0.3s;
}
.spec-card:hover { border-color: var(--accent); transform: translateY(-5px); }
.spec-card i { font-size: 2rem; color: var(--accent); margin-bottom: 20px; }
.spec-card h4 { font-size: 1.2rem; margin-bottom: 10px; }
.spec-card p { color: var(--text-gray); }

/* --- 7. Download CTA (Massive) --- */
.download-section {
    padding: 180px 0; text-align: center; position: relative; overflow: hidden;
    border-top: 1px solid var(--glass-border);
}
.glow-bg {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    width: 600px; height: 600px; background: radial-gradient(circle, rgba(59, 130, 246, 0.15), transparent 70%);
    pointer-events: none; z-index: 0;
}
.download-section h1 { font-size: 4.5rem; font-weight: 800; margin-bottom: 10px; position: relative; z-index: 1; }
.download-section p { font-size: 1.5rem; color: var(--text-gray); margin-bottom: 50px; position: relative; z-index: 1; }

.download-box { position: relative; z-index: 1; display: inline-block; }
.btn-download-large {
    background: white; color: black; border: none; padding: 20px 60px;
    border-radius: 12px; display: flex; align-items: center; gap: 20px; cursor: pointer;
    transition: 0.3s;
}
.btn-download-large:hover { transform: scale(1.05); box-shadow: 0 0 50px rgba(255,255,255,0.4); }
.btn-download-large i { font-size: 2.5rem; }
.btn-download-large span { font-size: 1.5rem; font-weight: 800; display: block; text-align: left; }
.btn-download-large small { font-size: 0.9rem; font-weight: 500; color: #555; display: block; }

.download-meta { margin-top: 20px; display: flex; gap: 30px; justify-content: center; color: var(--text-gray); font-size: 0.9rem; }
.download-meta i { color: #4ade80; margin-right: 5px; }

/* --- 8. Footer --- */
footer { padding: 40px 0; background: #000; border-top: 1px solid var(--glass-border); text-align: center; }
.f-logo { font-family: var(--font-logo); font-size: 1.2rem; color: white; margin-right: 20px; }
.f-copy { color: #666; font-size: 0.9rem; }

/* Reveal Animation */
.reveal { opacity: 0; transform: translateY(40px); transition: 1s cubic-bezier(0.2, 0.8, 0.2, 1); }
.reveal.active { opacity: 1; transform: translateY(0); }

/* Mobile */
@media (max-width: 1024px) {
    .hero-content h1 { font-size: 3.5rem; }
    .row-layout, .row-layout.reverse { flex-direction: column; }
    .specs-grid { grid-template-columns: 1fr 1fr; }
    .nav-links { display: none; }
    .download-section h1 { font-size: 3rem; }
}