*{margin:0;padding:0;box-sizing:border-box}
:root{
    --bg:#0d0d0d;--surface:#1a1a1a;--card:#1e1e1e;
    --accent:#429ef5;--accent2:#7c5cfc;
    --text:#e8e8e8;--dim:#888;--border:#2a2a2a;
}
body{font-family:'Segoe UI','Helvetica Neue',Arial,sans-serif;background:var(--bg);color:var(--text);overflow-x:hidden}

/* ── Animated background with floating math symbols ── */
.bg-gradient{position:fixed;top:0;left:0;width:100%;height:100%;z-index:-1;overflow:hidden;
    background:linear-gradient(135deg,#0d0d0d 0%,#1a1a2e 50%,#16213e 100%);
    background-size:400% 400%;animation:gradientShift 12s ease infinite}
@keyframes gradientShift{0%{background-position:0% 50%}50%{background-position:100% 50%}100%{background-position:0% 50%}}

/* Floating math symbols */
.bg-gradient::before,.bg-gradient::after{content:'';position:absolute;width:100%;height:100%;top:0;left:0;pointer-events:none}
.math-particles{position:fixed;top:0;left:0;width:100%;height:100%;z-index:-1;pointer-events:none;overflow:hidden}
.math-particle{position:absolute;font-family:'Courier New',monospace;color:rgba(66,158,245,0.08);font-size:20px;
    animation:mathFloat linear infinite;white-space:nowrap;user-select:none}
@keyframes mathFloat{0%{transform:translateY(100vh) rotate(0deg);opacity:0}10%{opacity:1}90%{opacity:1}100%{transform:translateY(-100px) rotate(360deg);opacity:0}}

/* Grid pattern overlay */
.bg-grid{position:fixed;top:0;left:0;width:100%;height:100%;z-index:-1;pointer-events:none;
    background-image:linear-gradient(rgba(66,158,245,0.03) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(66,158,245,0.03) 1px,transparent 1px);
    background-size:60px 60px;animation:gridPulse 4s ease-in-out infinite}
@keyframes gridPulse{0%,100%{opacity:0.3}50%{opacity:0.6}}

/* ── Navigation ── */
nav{position:fixed;top:0;left:0;width:100%;height:64px;padding:0 48px;display:flex;justify-content:space-between;align-items:center;
    background:rgba(13,13,13,0.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);z-index:100;
    border-bottom:1px solid rgba(255,255,255,0.06)}
nav .logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:var(--text);letter-spacing:-0.3px}
nav .logo img{width:28px;height:28px;border-radius:6px}
nav .logo .brand{color:var(--accent)}
nav .version-badge{background:rgba(66,158,245,0.15);color:var(--accent);font-size:11px;font-weight:600;
    padding:3px 8px;border-radius:10px;border:1px solid rgba(66,158,245,0.3);letter-spacing:0.3px}
nav ul{list-style:none;display:flex;gap:4px}
nav li{position:relative}
nav a{display:block;color:var(--dim);text-decoration:none;font-size:14px;font-weight:500;padding:8px 16px;border-radius:8px;transition:all 0.2s}
nav a:hover{color:var(--text);background:rgba(255,255,255,0.05)}
nav .nav-cta{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;padding:8px 20px;border-radius:8px;font-weight:600}
nav .nav-cta:hover{box-shadow:0 4px 20px rgba(66,158,245,0.3);transform:translateY(-1px)}

/* ── Hero ── */
.hero{min-height:100vh;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:80px 20px 40px}
.hero h1{font-size:clamp(36px,8vw,72px);font-weight:800;line-height:1.1;margin-bottom:16px;
    background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:clamp(16px,2.5vw,22px);color:var(--dim);max-width:600px;margin-bottom:40px;line-height:1.6}
.hero .badges{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;margin-bottom:32px}
.badge{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:6px 16px;font-size:13px;color:var(--dim)}
.cta{display:flex;gap:16px;flex-wrap:wrap;justify-content:center}
.btn{padding:14px 32px;border-radius:10px;font-size:16px;font-weight:600;text-decoration:none;transition:all 0.3s;cursor:pointer;border:none}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(66,158,245,0.3)}
.btn-secondary{background:transparent;color:var(--accent);border:1px solid var(--accent)}
.btn-secondary:hover{background:rgba(66,158,245,0.1)}

/* ── Animated icon showcase ── */
.showcase{display:flex;justify-content:center;margin:60px 0 20px}
.showcase img{width:120px;height:120px;animation:float 3s ease-in-out infinite;border-radius:16px}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

/* ── Sections ── */
section{padding:80px 40px;max-width:1200px;margin:0 auto}
.section-title{font-size:clamp(28px,4vw,42px);font-weight:700;margin-bottom:12px;text-align:center}
.section-sub{color:var(--dim);text-align:center;max-width:600px;margin:0 auto 48px;line-height:1.6;font-size:16px}

/* ── Mode grid ── */
.mode-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.mode-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:24px;
    transition:all 0.3s;opacity:0;transform:translateY(20px);animation:fadeUp 0.6s ease forwards}
.mode-card:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:0 8px 30px rgba(0,0,0,0.3)}
.mode-card h3{font-size:18px;margin-bottom:8px;color:var(--accent)}
.mode-card p{color:var(--dim);font-size:14px;line-height:1.5}
@keyframes fadeUp{to{opacity:1;transform:translateY(0)}}
.mode-card:nth-child(1){animation-delay:0.05s}.mode-card:nth-child(2){animation-delay:0.1s}
.mode-card:nth-child(3){animation-delay:0.15s}.mode-card:nth-child(4){animation-delay:0.2s}
.mode-card:nth-child(5){animation-delay:0.25s}.mode-card:nth-child(6){animation-delay:0.3s}
.mode-card:nth-child(7){animation-delay:0.35s}.mode-card:nth-child(8){animation-delay:0.4s}
.mode-card:nth-child(9){animation-delay:0.45s}.mode-card:nth-child(10){animation-delay:0.5s}
.mode-card:nth-child(11){animation-delay:0.55s}.mode-card:nth-child(12){animation-delay:0.6s}
.mode-card:nth-child(13){animation-delay:0.65s}.mode-card:nth-child(14){animation-delay:0.7s}
.mode-card:nth-child(15){animation-delay:0.75s}.mode-card:nth-child(16){animation-delay:0.8s}
.mode-card:nth-child(17){animation-delay:0.85s}.mode-card:nth-child(18){animation-delay:0.9s}
.mode-card:nth-child(19){animation-delay:0.95s}.mode-card:nth-child(20){animation-delay:1.0s}
.mode-card:nth-child(21){animation-delay:1.05s}.mode-card:nth-child(22){animation-delay:1.1s}

/* ── Features ── */
.feat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.feat-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:32px;transition:all 0.3s}
.feat-card:hover{border-color:var(--accent)}
.feat-icon{font-size:28px;margin-bottom:12px}
.feat-card h3{font-size:18px;margin-bottom:8px}
.feat-card p{color:var(--dim);font-size:14px;line-height:1.6}

/* ── Install table ── */
.install-table{width:100%;border-collapse:collapse;background:var(--card);border-radius:12px;overflow:hidden}
.install-table th,.install-table td{padding:14px 20px;text-align:left;border-bottom:1px solid var(--border);font-size:14px}
.install-table th{background:var(--surface);color:var(--accent);font-weight:600}
.install-table td:first-child{font-weight:600}
.install-table code{background:var(--bg);padding:2px 8px;border-radius:4px;font-size:13px}

/* ── Stats ── */
.stats{display:flex;justify-content:center;gap:60px;flex-wrap:wrap;padding:60px 0}
.stat{text-align:center}
.stat-num{font-size:48px;font-weight:800;background:linear-gradient(135deg,var(--accent),var(--accent2));
    -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.stat-label{color:var(--dim);font-size:14px;margin-top:4px}

/* ── Footer ── */
footer{text-align:center;padding:40px;color:var(--dim);font-size:13px;border-top:1px solid var(--border)}
footer a{color:var(--accent);text-decoration:none}
footer a:hover{text-decoration:underline}

/* ── Responsive ── */
@media(max-width:768px){
    nav{padding:0 16px;height:52px}
    nav ul{gap:0;flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch}
    nav a{padding:6px 10px;font-size:12px;white-space:nowrap}
    nav .nav-cta{padding:6px 14px}
    nav .version-badge{font-size:10px;padding:2px 6px}
    section{padding:48px 16px}
    .hero{padding:72px 16px 32px}
    .hero p{font-size:15px}
    .mode-grid{grid-template-columns:1fr}
    .feat-grid{grid-template-columns:1fr}
    .stats{gap:24px}
    .stat-num{font-size:36px}
    .install-table{font-size:11px;display:block;overflow-x:auto}
    .install-table th,.install-table td{padding:8px 10px}
    .cta{flex-direction:column;align-items:center}
    .btn{width:100%;max-width:280px;text-align:center}
}
@media(max-width:480px){
    nav .logo .brand{display:none}
    .showcase img{width:80px;height:80px}
    .hero h1{font-size:32px}
    .badges{gap:8px}
    .badge{font-size:11px;padding:4px 10px}
    .mode-card{padding:16px}
    .feat-card{padding:20px}
    .stat-num{font-size:28px}
}

/* ── Scroll animation trigger ── */
.reveal{opacity:0;transform:translateY(30px);transition:all 0.6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}