/*
 * Hypermodes — Formula Universe v3
 * Animation-first design
 */

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

:root{
  --bg:#080d1a;
  --card:rgba(255,255,255,0.03);
  --border:rgba(255,255,255,0.06);
  --text:#e8ecf2;
  --dim:#959eb3;
  --purple:#8b5cf6;
  --cyan:#22d3ee;
  --font:system-ui,-apple-system,'Segoe UI',sans-serif;
  --mono:'Courier New',monospace;
  --grad:linear-gradient(135deg,var(--purple),var(--cyan));
  --max:960px;
}

html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

/* == Space glow == */
body::before{
  content:'';position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(ellipse 60% 40% at 20% 10%,rgba(139,92,246,0.07),transparent),
    radial-gradient(ellipse 50% 40% at 80% 90%,rgba(34,211,238,0.05),transparent);
}

/* == Canvas layers == */
#piCanvas,#spiralCanvas{
  position:fixed;
  inset:0;z-index:-1;pointer-events:none;
}

/* == Nav == */
nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(8,13,26,0.85);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
  height:56px;
}

.nav-inner{
  max-width:var(--max);margin:0 auto;
  height:100%;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 20px;
}

.nav-brand{
  display:flex;align-items:center;gap:10px;
  text-decoration:none;font-weight:700;font-size:16px;color:var(--text);
}

.nav-brand svg{width:24px;height:24px}

.nav-links{display:flex;gap:4px;list-style:none}
.nav-links a{
  color:var(--dim);text-decoration:none;font-size:13px;
  padding:6px 12px;border-radius:6px;transition:all .2s;
}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:var(--card)}

.nav-toggle{display:none;background:none;border:none;color:var(--text);cursor:pointer;padding:6px}

/* == Layout == */
.container{max-width:var(--max);margin:0 auto;padding:0 20px}
main{padding-top:80px;padding-bottom:60px;position:relative;z-index:1}

/* == Hero == */
.hero{
  text-align:center;
  padding:60px 0 40px;
  position:relative;
}

.hero-logo{
  width:80px;height:80px;margin:0 auto 24px;
  background:var(--grad);border-radius:18px;padding:16px;
  box-shadow:0 0 50px rgba(139,92,246,0.25);
  animation:float 3s ease-in-out infinite;
}

@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}

.hero h1{
  font-size:clamp(2rem,5vw,3.2rem);font-weight:800;
  background:var(--grad);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  letter-spacing:-0.02em;
  margin-bottom:8px;
}

.hero .tagline{
  font-size:15px;color:var(--dim);margin-bottom:32px;
}

/* == Quick nav buttons == */
.quick-nav{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:40px;
}

.quick-nav a{
  text-decoration:none;color:var(--dim);font-size:13px;
  padding:10px 20px;background:var(--card);border:1px solid var(--border);
  border-radius:20px;transition:all .25s;
}
.quick-nav a:hover{color:var(--text);border-color:var(--purple);box-shadow:0 0 20px rgba(139,92,246,0.1)}

/* == Feature row == */
.features{
  display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:32px 0;
}

.feat-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:16px;padding:28px;transition:all .3s;
}
.feat-card:hover{border-color:rgba(139,92,246,0.2);transform:translateY(-2px)}

.feat-icon{
  font-family:var(--mono);font-size:24px;font-weight:700;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  margin-bottom:8px;
}

.feat-title{font-size:15px;font-weight:600;margin-bottom:4px}
.feat-desc{font-size:13px;color:var(--dim);line-height:1.5}

/* == About section == */
.about{
  background:var(--card);border:1px solid var(--border);
  border-radius:16px;padding:32px;margin:24px 0;
}

.about h2{font-size:18px;font-weight:700;margin-bottom:12px}
.about p{font-size:14px;color:var(--dim);margin-bottom:10px}

.about ul{list-style:none;margin-top:8px}
.about ul li{font-size:13px;color:var(--dim);padding:6px 0 6px 18px;position:relative}
.about ul li::before{content:'›';position:absolute;left:0;color:var(--purple);font-weight:700}

/* == Page header == */
.page-hd{text-align:center;padding:40px 0 28px}
.page-hd .formula{font-family:var(--mono);font-size:clamp(18px,3vw,26px);color:var(--cyan)}
.page-hd h1{font-size:clamp(1.6rem,3.5vw,2.2rem);font-weight:800;margin:8px 0 4px}
.page-hd .sub{font-size:14px;color:var(--dim)}
.page-hd .date{font-size:11px;color:var(--dim);opacity:.6;margin-top:4px}

/* == Content card == */
.c-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:16px;padding:32px;margin-bottom:16px;
}

.c-card h2{font-size:17px;font-weight:700;margin:24px 0 8px;padding-bottom:6px;border-bottom:1px solid var(--border)}
.c-card h2:first-child{margin-top:0}
.c-card h3{font-size:14px;font-weight:600;margin:16px 0 6px;color:var(--text)}
.c-card p,.c-card li{font-size:14px;color:var(--dim);margin-bottom:10px;line-height:1.7}
.c-card ul,.c-card ol{margin-left:18px}
.c-card strong{color:var(--text)}
.c-card a{color:var(--cyan);text-decoration:none}
.c-card a:hover{text-decoration:underline}

/* == Highlight == */
.hl-box{
  background:linear-gradient(135deg,rgba(139,92,246,0.08),rgba(34,211,238,0.06));
  border:1px solid rgba(139,92,246,0.15);
  border-radius:16px;padding:28px;text-align:center;margin-bottom:16px;
}

.hl-box .big-formula{font-family:var(--mono);font-size:20px;color:var(--cyan);margin-bottom:8px}
.hl-box h3{font-size:15px;margin-bottom:6px}
.hl-box p{font-size:13px;color:var(--dim)}
.hl-tag{
  display:inline-block;padding:6px 18px;background:var(--card);
  border:1px solid var(--border);border-radius:20px;
  font-family:var(--mono);font-size:12px;color:var(--cyan);margin-top:8px;
}

/* == Contact == */
.contact-row{display:flex;gap:12px;flex-wrap:wrap;margin:12px 0}
.contact-item{
  flex:1;min-width:180px;display:flex;align-items:center;gap:12px;
  padding:14px 18px;background:var(--card);border:1px solid var(--border);
  border-radius:12px;text-decoration:none;color:var(--text);transition:all .2s;
}
.contact-item:hover{border-color:var(--purple);background:rgba(255,255,255,0.05)}
.contact-icon{width:36px;height:36px;border-radius:8px;background:rgba(139,92,246,0.1);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.contact-label{font-size:10px;color:var(--dim);text-transform:uppercase;letter-spacing:.05em}
.contact-value{font-size:13px}

/* == FAQ == */
.faq-item{border-bottom:1px solid var(--border);padding:16px 0}
.faq-item:last-child{border:none}
.faq-q{font-size:14px;font-weight:600;margin-bottom:4px}
.faq-a{font-size:13px;color:var(--dim)}
.faq-a a{color:var(--cyan);text-decoration:none}

/* == Steps == */
.steps{list-style:none;counter-reset:s}
.steps li{
  counter-increment:s;padding:14px 0 14px 42px;position:relative;border-bottom:1px solid var(--border);
}
.steps li:last-child{border:none}
.steps li::before{
  content:counter(s);position:absolute;left:0;top:12px;
  width:30px;height:30px;border-radius:50%;
  background:rgba(34,211,238,0.08);border:1px solid rgba(34,211,238,0.2);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:12px;font-weight:700;color:var(--cyan);
}
.steps li strong{display:block;font-size:14px;color:var(--text);margin-bottom:2px}
.steps li span{font-size:13px;color:var(--dim)}

/* == Spiral decoration == */
.spiral-decor{
  position:fixed;right:-200px;bottom:-200px;
  width:500px;height:500px;z-index:-1;pointer-events:none;
  opacity:.15;
}

/* == Footer == */
footer{
  border-top:1px solid var(--border);padding:16px 0;text-align:center;
}
footer p{font-size:11px;color:var(--dim)}
footer a{color:var(--dim);text-decoration:none}
footer a:hover{color:var(--text)}

/* == Responsive == */
@media(max-width:768px){
  .nav-toggle{display:block}
  .nav-links{
    display:none;position:absolute;top:56px;left:0;right:0;
    flex-direction:column;background:rgba(8,13,26,0.98);
    backdrop-filter:blur(16px);border-bottom:1px solid var(--border);
    padding:8px 16px;gap:0;
  }
  .nav-links.open{display:flex}
  .features{grid-template-columns:1fr}
  .hero{padding:32px 0 24px}
  .hero-logo{width:60px;height:60px;padding:12px}
  .c-card{padding:20px}
}