/* ===== XeroNine — dark, dynamic personal site ===== */
:root{
  --bg:#07070d;
  --bg-2:#0a0a12;
  --surface:rgba(255,255,255,0.03);
  --surface-2:rgba(255,255,255,0.05);
  --border:rgba(255,255,255,0.08);
  --border-glow:rgba(124,92,255,0.35);
  --text:#e7e9f3;
  --muted:#9aa0b4;
  --faint:#6b7180;
  --cyan:#22d3ee;
  --indigo:#6366f1;
  --violet:#a855f7;
  --grad:linear-gradient(120deg,#22d3ee 0%,#6366f1 50%,#a855f7 100%);
  --grad-soft:linear-gradient(120deg,rgba(34,211,238,.16),rgba(168,85,247,.16));
  --maxw:1120px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Space Grotesk',system-ui,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
::selection{background:rgba(99,102,241,.4);color:#fff}

/* scrollbar */
::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:linear-gradient(var(--indigo),var(--violet));border-radius:10px;border:2px solid var(--bg)}

/* ===== top gradient line ===== */
.top-line{position:fixed;top:0;left:0;right:0;height:3px;z-index:100;
  background:linear-gradient(90deg,#22d3ee,#6366f1,#a855f7,#22d3ee);
  background-size:200% 100%;
  animation:topline 3s linear infinite}
@keyframes topline{from{background-position:0% 0%}to{background-position:200% 0%}}

/* ===== animated background ===== */
#bg-canvas{position:fixed;inset:0;z-index:-3;opacity:.55}
.aurora{position:fixed;inset:0;z-index:-2;overflow:hidden;filter:blur(80px)}
.blob{position:absolute;border-radius:50%;opacity:.5;mix-blend-mode:screen;animation:drift 26s var(--ease) infinite}
.b1{width:46vw;height:46vw;background:radial-gradient(circle,#22d3ee,transparent 65%);top:-12vw;left:-8vw}
.b2{width:42vw;height:42vw;background:radial-gradient(circle,#a855f7,transparent 65%);bottom:-14vw;right:-6vw;animation-delay:-8s}
.b3{width:36vw;height:36vw;background:radial-gradient(circle,#6366f1,transparent 65%);top:38%;left:48%;animation-delay:-15s}
@keyframes drift{0%,100%{transform:translate(0,0) scale(1)}33%{transform:translate(6vw,4vw) scale(1.12)}66%{transform:translate(-5vw,2vw) scale(.92)}}
body::after{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(circle at 50% 0%,transparent,var(--bg) 78%)}

.cursor-glow{position:fixed;top:0;left:0;width:420px;height:420px;border-radius:50%;pointer-events:none;z-index:-1;
  background:radial-gradient(circle,rgba(99,102,241,.10),transparent 60%);transform:translate(-50%,-50%);transition:opacity .3s;opacity:0}

/* ===== nav ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;align-items:center;justify-content:space-between;
  padding:18px clamp(20px,5vw,52px);transition:padding .3s var(--ease),background .3s,border-color .3s;
  border-bottom:1px solid transparent}
.nav.scrolled{padding:12px clamp(20px,5vw,52px);background:rgba(8,8,14,.72);backdrop-filter:blur(14px);border-bottom-color:var(--border)}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;font-size:1.15rem;letter-spacing:.2px}
.brand-mark{width:34px;height:34px;filter:drop-shadow(0 0 10px rgba(99,102,241,.5))}
.brand .accent{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav-links{display:flex;align-items:center;gap:28px;font-size:.95rem}
.nav-links a{color:var(--muted);transition:color .2s;position:relative}
.nav-links a:not(.btn-ghost):hover{color:var(--text)}
.nav-links a:not(.btn-ghost)::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--grad);transition:width .25s var(--ease)}
.nav-links a:not(.btn-ghost):hover::after{width:100%}

.btn-primary,.btn-ghost{font-family:inherit;font-weight:600;font-size:.95rem;padding:11px 22px;border-radius:12px;cursor:pointer;transition:transform .2s var(--ease),box-shadow .25s,background .25s;display:inline-block}
.btn-primary{background:var(--grad);color:#08080f;box-shadow:0 8px 30px -8px rgba(99,102,241,.6)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 40px -8px rgba(168,85,247,.7)}
.btn-ghost{border:1px solid var(--border);color:var(--text);background:var(--surface)}
.btn-ghost:hover{border-color:var(--border-glow);background:var(--surface-2);transform:translateY(-2px)}

/* ===== hero ===== */
.hero{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:120px clamp(20px,5vw,52px) 80px;text-align:center}
.hero-inner{max-width:840px}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-family:'JetBrains Mono',monospace;font-size:.82rem;color:var(--muted);
  text-transform:uppercase;letter-spacing:2px;padding:7px 16px;border:1px solid var(--border);border-radius:999px;background:var(--surface);margin-bottom:28px}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.hero-title{font-size:clamp(3.6rem,12vw,8.5rem);font-weight:700;line-height:.95;letter-spacing:-3px;margin-bottom:10px}
.hero-title .grad{background:var(--grad);background-size:200% 200%;-webkit-background-clip:text;background-clip:text;color:transparent;animation:shimmer 6s ease infinite}
@keyframes shimmer{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
.hero-sub{font-size:clamp(1.2rem,3.5vw,1.9rem);color:var(--text);margin-bottom:22px;font-weight:500}
.rotator{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;border-bottom:2px solid rgba(99,102,241,.4)}
.hero-desc{color:var(--muted);font-size:1.08rem;max-width:560px;margin:0 auto 38px}
.hero-cta{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.scroll-hint{margin-top:64px;width:26px;height:42px;border:2px solid var(--border);border-radius:14px;margin-left:auto;margin-right:auto;position:relative}
.scroll-hint span{position:absolute;top:8px;left:50%;width:4px;height:8px;background:var(--grad);border-radius:4px;transform:translateX(-50%);animation:scrolldot 1.8s infinite}
@keyframes scrolldot{0%{opacity:0;top:8px}40%{opacity:1}80%{opacity:0;top:24px}}

/* ===== sections ===== */
.section{max-width:var(--maxw);margin:0 auto;padding:100px clamp(20px,5vw,52px)}
.section-head{margin-bottom:54px;max-width:680px}
.kicker{font-family:'JetBrains Mono',monospace;font-size:.8rem;letter-spacing:2px;text-transform:uppercase;color:var(--cyan)}
.section-head h2{font-size:clamp(2rem,5vw,3.1rem);font-weight:700;letter-spacing:-1.5px;margin-top:14px;line-height:1.1}
.section-note{color:var(--muted);margin-top:14px}

/* about */
.about-grid{display:grid;gap:48px}
.about-lead{font-size:1.3rem;color:var(--text);max-width:760px}
.about-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.mini-card{padding:28px;border:1px solid var(--border);border-radius:18px;background:var(--surface);transition:transform .3s var(--ease),border-color .3s,background .3s}
.mini-card:hover{transform:translateY(-6px);border-color:var(--border-glow);background:var(--surface-2)}
.mini-card h3{font-size:1.15rem;margin-bottom:8px}
.mini-card h3::before{content:"▹ ";color:var(--cyan)}
.mini-card p{color:var(--muted);font-size:.97rem}

/* projects */
.projects-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:24px}
.project-card{position:relative;padding:30px;border:1px solid var(--border);border-radius:20px;background:var(--surface);
  transition:transform .25s var(--ease),border-color .3s,box-shadow .3s;transform-style:preserve-3d;overflow:hidden;cursor:default}
.project-card::before{content:"";position:absolute;inset:0;border-radius:20px;padding:1px;background:var(--grad);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .35s}
.project-card:hover{border-color:transparent;box-shadow:0 24px 60px -22px rgba(99,102,241,.55)}
.project-card:hover::before{opacity:1}
.project-card .glow{position:absolute;width:300px;height:300px;border-radius:50%;background:radial-gradient(circle,rgba(99,102,241,.18),transparent 60%);pointer-events:none;opacity:0;transition:opacity .3s;transform:translate(-50%,-50%)}
.project-card:hover .glow{opacity:1}
.pc-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.pc-icon{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;font-size:1.4rem;background:var(--grad-soft);border:1px solid var(--border)}
.pc-badge{font-family:'JetBrains Mono',monospace;font-size:.7rem;letter-spacing:1px;text-transform:uppercase;padding:5px 11px;border-radius:999px;border:1px solid var(--border);color:var(--muted)}
.pc-badge.public{color:var(--cyan);border-color:rgba(34,211,238,.4)}
.pc-badge.private{color:var(--violet);border-color:rgba(168,85,247,.4)}
.project-card h3{font-size:1.3rem;margin-bottom:10px}
.project-card p{color:var(--muted);font-size:.96rem;margin-bottom:18px}
.pc-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.pc-tags span{font-family:'JetBrains Mono',monospace;font-size:.72rem;color:var(--faint);padding:4px 10px;border-radius:8px;background:var(--surface-2)}
.pc-link{font-family:'JetBrains Mono',monospace;font-size:.85rem;color:var(--cyan);display:inline-flex;align-items:center;gap:6px;transition:gap .2s;position:relative;z-index:1}
.pc-link:hover{gap:11px}
.pc-link.disabled{color:var(--faint);cursor:default}
.pc-link.working{color:var(--cyan);cursor:default;display:inline-flex;align-items:center;gap:8px}
.pc-link.working .wdot{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);animation:pulse 1.6s infinite}

/* marquee */
.marquee{overflow:hidden;-webkit-mask:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.marquee-track{display:flex;gap:16px;width:max-content;animation:scrollx 32s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes scrollx{to{transform:translateX(-50%)}}
.chip{font-family:'JetBrains Mono',monospace;font-size:.95rem;color:var(--muted);padding:13px 22px;border:1px solid var(--border);border-radius:13px;background:var(--surface);white-space:nowrap;transition:color .2s,border-color .2s}
.chip:hover{color:var(--text);border-color:var(--border-glow)}

/* contact */
.contact{text-align:center}
.contact-card{max-width:620px;margin:0 auto;padding:60px 40px;border:1px solid var(--border);border-radius:28px;
  background:var(--grad-soft);position:relative;overflow:hidden}
.contact-card h2{margin:14px 0 14px}
.contact-card p{color:var(--muted);margin-bottom:30px}
.contact-links{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;align-items:center}
.email-copy{font-family:'JetBrains Mono',monospace;font-size:1rem;font-weight:500;padding:11px 22px;border-radius:12px;
  border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;user-select:all;
  transition:border-color .2s,background .2s,color .2s}
.email-copy:hover{border-color:var(--border-glow);background:var(--surface-2)}
.email-copy.copied{border-color:var(--accent);color:var(--accent);user-select:none}

/* footer */
.footer{display:flex;align-items:center;justify-content:center;gap:12px;padding:40px 20px 60px;color:var(--faint);font-size:.9rem;border-top:1px solid var(--border)}
.footer-mark{width:24px;height:24px;opacity:.7}

/* reveal */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.visible{opacity:1;transform:none}

@media (max-width:720px){
  .nav-links a:not(.btn-ghost){display:none}
  .about-lead{font-size:1.1rem}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001s!important;animation-iteration-count:1!important;transition-duration:.15s!important}
  #bg-canvas{display:none}
  html{scroll-behavior:auto}
}