/* Neo Personal Site — Tech / Cyber Theme */

/* ── Reset & Base ─────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#060a14;--bg-alt:#0b1221;--bg-card:#0f1a2e;--bg-card-hov:#152035;
  --text:#e2e8f0;--text-muted:#94a3b8;--text-dim:#475569;
  --accent:#00d4ff;--accent-dim:#00d4ff22;--accent-glow:#00d4ff55;
  --border:#1e3a5f;--border-hi:#2d5283;
  --green:#10b981;--yellow:#f59e0b;--red:#ef4444;--purple:#a78bfa;
  --font-body:'Space Grotesk',system-ui,sans-serif;
  --font-mono:'JetBrains Mono','Fira Code',monospace;
  --nav-h:64px;--top-bar-h:38px;--max-w:1140px;--radius:10px;
  --t:0.25s cubic-bezier(0.4,0,0.2,1);
}
[data-theme="light"]{
  --bg:#f8fafc;--bg-alt:#f1f5f9;--bg-card:#ffffff;--bg-card-hov:#f8fafc;
  --text:#0f172a;--text-muted:#475569;--text-dim:#94a3b8;
  --accent:#0284c7;--accent-dim:#0284c722;--accent-glow:#0284c755;
  --border:#cbd5e1;--border-hi:#94a3b8;
}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);background:var(--bg);color:var(--text);line-height:1.7;overflow-x:hidden;-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:var(--font-body);font-weight:700;letter-spacing:-0.02em}
a{color:var(--accent);text-decoration:none;transition:var(--t)}

.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.section-label{font-family:var(--font-mono);font-size:0.8rem;color:var(--accent);letter-spacing:0.08em;margin-bottom:8px}
.section-title{font-size:clamp(1.8rem,4vw,2.6rem);margin-bottom:48px}
.section-title::after{content:'';display:block;width:48px;height:3px;background:var(--accent);margin-top:12px;border-radius:2px}

::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--border-hi);border-radius:3px}

/* ── Top Bar ──────────────────────────────────────────── */
.top-bar{
  position:fixed;top:0;left:0;right:0;z-index:200;
  height:var(--top-bar-h);
  background:color-mix(in srgb,var(--bg-alt) 90%,transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.top-bar-inner{
  max-width:var(--max-w);margin:0 auto;padding:0 24px;
  height:100%;display:flex;align-items:center;justify-content:flex-end;
}
.top-bar-social{display:flex;align-items:center;gap:4px;}
.social-icon{
  display:flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:6px;
  color:var(--text-muted);transition:var(--t);
}
.social-icon svg{width:16px;height:16px;fill:currentColor;}
.social-icon:hover{color:var(--accent);background:var(--accent-dim);}

/* ── Theme Toggle ──────────────────────────────────────── */
.theme-toggle{
  position:fixed;top:calc(var(--top-bar-h) + 12px);right:16px;z-index:300;
  width:40px;height:40px;border-radius:50%;
  border:1px solid var(--border);background:var(--bg-card);
  color:var(--text);cursor:pointer;
  display:flex;align-items:center;justify-content:center;transition:var(--t);
}
.theme-toggle:hover{border-color:var(--accent);box-shadow:0 0 16px var(--accent-glow)}
.theme-toggle svg{width:17px;height:17px}
.theme-toggle .icon-sun{display:none}
[data-theme="light"] .theme-toggle .icon-moon{display:none}
[data-theme="light"] .theme-toggle .icon-sun{display:block}

/* ── Navigation ────────────────────────────────────────── */
.nav{
  position:fixed;top:var(--top-bar-h);left:0;right:0;height:var(--nav-h);z-index:100;
  background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
  transition:box-shadow 0.3s;
}
.nav.scrolled{box-shadow:0 4px 30px rgba(0,0,0,0.3)}
.nav-inner{
  max-width:var(--max-w);margin:0 auto;padding:0 24px;
  height:100%;display:flex;align-items:center;justify-content:space-between;
}
.nav-logo{
  font-family:var(--font-mono);font-size:1.15rem;font-weight:700;
  color:var(--accent)!important;letter-spacing:-0.01em;
  transition:var(--t);
}
.nav-logo:hover{text-shadow:0 0 20px var(--accent-glow);color:var(--accent)!important}
.nav-logo-img{height:56px;width:auto;display:block;}
/* Compact logo if top-bar exists */
.top-bar + .nav .nav-logo{font-size:1rem}
.nav-links{list-style:none;display:flex;gap:28px}
.nav-link{
  font-family:var(--font-mono);font-size:0.8rem;
  color:var(--text-muted);letter-spacing:0.06em;text-transform:uppercase;
  position:relative;padding:4px 0;
}
.nav-link::after{
  content:'';position:absolute;bottom:0;left:0;
  width:0;height:1px;background:var(--accent);transition:width var(--t);
}
.nav-link:hover,.nav-link.active{color:var(--text)}
.nav-link:hover::after,.nav-link.active::after{width:100%}
.nav-link.active{color:var(--accent)}

/* ── Hero ──────────────────────────────────────────────── */
.hero{
  min-height:100vh;
  display:flex;align-items:center;justify-content:center;
  position:relative;
  padding:calc(var(--top-bar-h) + var(--nav-h) + 48px) 24px 96px;
  overflow:hidden;
}
.hero-bg-grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(var(--border) 1px,transparent 1px),
    linear-gradient(90deg,var(--border) 1px,transparent 1px);
  background-size:48px 48px;opacity:0.18;
  mask-image:radial-gradient(ellipse 80% 80% at 50% 50%,black 40%,transparent 100%);
  -webkit-mask-image:radial-gradient(ellipse 80% 80% at 50% 50%,black 40%,transparent 100%);
}
.hero-bg-glow{
  position:absolute;top:15%;left:50%;transform:translateX(-50%);
  width:700px;height:450px;
  background:radial-gradient(ellipse,var(--accent-dim) 0%,transparent 70%);
  pointer-events:none;animation:glowPulse 6s ease-in-out infinite;
}
@keyframes glowPulse{
  0%,100%{opacity:0.6;transform:translateX(-50%) scale(1)}
  50%{opacity:1;transform:translateX(-50%) scale(1.1)}
}
.hero-content{position:relative;z-index:2;max-width:720px;text-align:center;animation:fadeUp 0.8s ease both}
@keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}

.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 16px;border:1px solid var(--border-hi);border-radius:999px;
  font-family:var(--font-mono);font-size:0.75rem;color:var(--accent);
  letter-spacing:0.06em;margin-bottom:24px;
  background:var(--accent-dim);animation:fadeUp 0.8s 0.1s ease both;
}
.badge-dot{width:7px;height:7px;border-radius:50%;background:var(--green);animation:blink 2s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0.3}}

.hero-name{font-size:clamp(3.5rem,10vw,7rem);font-weight:700;letter-spacing:-0.04em;color:var(--text);line-height:1;margin-bottom:8px;animation:fadeUp 0.8s 0.15s ease both}
.hero-title{font-size:clamp(0.9rem,3vw,1.35rem);font-weight:400;color:var(--accent);font-family:var(--font-mono);letter-spacing:0.04em;margin-bottom:24px;animation:fadeUp 0.8s 0.2s ease both}
.hero-desc{font-size:clamp(0.95rem,2vw,1.1rem);color:var(--text-muted);max-width:540px;margin:0 auto 40px;line-height:1.8;animation:fadeUp 0.8s 0.25s ease both}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;animation:fadeUp 0.8s 0.3s ease both}
.hero-stats{display:flex;justify-content:center;margin-top:56px;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--bg-card);animation:fadeUp 0.8s 0.4s ease both}
.stat{padding:18px 32px;display:flex;flex-direction:column;gap:3px}
.stat-num{font-family:var(--font-mono);font-size:1.4rem;font-weight:700;color:var(--accent)}
.stat-label{font-size:0.7rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.08em}
.stat-divider{width:1px;background:var(--border);margin:10px 0;align-self:center}
.hero-scroll{
  position:absolute;bottom:28px;left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:0.6rem;color:var(--text-dim);
  letter-spacing:0.12em;text-transform:uppercase;animation:fadeUp 1s 0.6s ease both;
}
.scroll-line{width:1px;height:36px;background:linear-gradient(to bottom,var(--accent),transparent);animation:scrollDrop 2s infinite}
@keyframes scrollDrop{0%{transform:scaleY(0);transform-origin:top;opacity:1}50%{transform:scaleY(1);transform-origin:top;opacity:1}100%{transform:scaleY(1);transform-origin:bottom;opacity:0}}

/* ── Buttons ───────────────────────────────────────────── */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 24px;border-radius:var(--radius);
  font-family:var(--font-mono);font-size:0.85rem;font-weight:500;
  letter-spacing:0.04em;cursor:pointer;transition:var(--t);
  border:none;text-decoration:none;
}
.btn-primary{background:var(--accent);color:#000!important}
.btn-primary:hover{box-shadow:0 0 24px var(--accent-glow);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--border-hi)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.btn-full{width:100%;justify-content:center}

/* ── About ─────────────────────────────────────────────── */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.about-text p{color:var(--text-muted);margin-bottom:16px;font-size:1rem;line-height:1.8}
.about-terminal{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--bg-card);font-family:var(--font-mono)}
.terminal-header{display:flex;align-items:center;gap:8px;padding:12px 16px;background:var(--bg-alt);border-bottom:1px solid var(--border)}
.terminal-dots{display:flex;gap:6px}
.dot{width:11px;height:11px;border-radius:50%}
.dot-red{background:var(--red)}.dot-yellow{background:var(--yellow)}.dot-green{background:var(--green)}
.terminal-title{font-size:0.73rem;color:var(--text-dim);margin-left:auto;font-family:var(--font-mono)}
.terminal-body{padding:20px;font-size:0.83rem;line-height:1.9;color:var(--text-muted)}
.t-key{color:var(--accent)}.t-str{color:var(--green)}.t-bool{color:var(--purple)}

/* ── Skills ────────────────────────────────────────────── */
.skills-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.skill-card{
  display:flex;align-items:center;gap:20px;
  padding:20px 24px;background:var(--bg-card);
  border:1px solid var(--border);border-radius:var(--radius);transition:var(--t);
}
.skill-card:hover{border-color:var(--accent);background:var(--bg-card-hov);transform:translateX(4px)}
.skill-icon-wrap{
  flex-shrink:0;width:48px;height:48px;
  display:flex;align-items:center;justify-content:center;border-radius:8px;
  background:var(--accent-dim);border:1px solid var(--border-hi);
}
.skill-icon-text{font-family:var(--font-mono);font-size:1.1rem;font-weight:700;color:var(--accent)}
.skill-info{flex:1;min-width:0}
.skill-name{font-size:0.95rem;font-weight:600;margin-bottom:8px}
.skill-bar{height:4px;background:var(--border);border-radius:2px;margin-bottom:8px;overflow:hidden}
.skill-fill{
  height:100%;width:0;
  background:linear-gradient(90deg,var(--accent),var(--purple));
  border-radius:2px;transition:width 1.2s cubic-bezier(0.4,0,0.2,1);
}
.revealed .skill-fill{width:var(--pct)}
.skill-detail{font-family:var(--font-mono);font-size:0.72rem;color:var(--text-dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ── Projects ──────────────────────────────────────────── */
.projects-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:20px}
.project-card{
  padding:28px;background:var(--bg-card);
  border:1px solid var(--border);border-radius:var(--radius);
  transition:var(--t);position:relative;overflow:hidden;
}
.project-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--accent),var(--purple));
  transform:scaleX(0);transform-origin:left;transition:transform 0.3s ease;
}
.project-card:hover{border-color:var(--border-hi);transform:translateY(-4px);box-shadow:0 16px 40px rgba(0,0,0,0.25)}
.project-card:hover::before{transform:scaleX(1)}
.project-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.project-icon{
  width:36px;height:36px;display:flex;align-items:center;justify-content:center;
  border-radius:6px;background:var(--accent-dim);color:var(--accent);
}
.project-icon svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.5}
.project-year{font-family:var(--font-mono);font-size:0.72rem;color:var(--text-dim)}
.project-name{font-size:1.05rem;margin-bottom:8px}
.project-desc{font-size:0.88rem;color:var(--text-muted);line-height:1.7;margin-bottom:16px}
.project-tags{display:flex;flex-wrap:wrap;gap:6px}
.tag{font-family:var(--font-mono);font-size:0.7rem;padding:3px 10px;border:1px solid var(--border-hi);border-radius:4px;color:var(--text-muted);background:var(--bg-alt)}

/* ── Contact ────────────────────────────────────────────── */
.contact-grid{display:grid;grid-template-columns:1fr 1.5fr;gap:48px;align-items:start}
.contact-intro p{color:var(--text-muted);margin-bottom:28px;line-height:1.8}
.contact-links{display:flex;flex-direction:column;gap:12px}
.contact-link{
  display:flex;align-items:center;gap:12px;
  padding:14px 18px;border:1px solid var(--border);border-radius:var(--radius);
  color:var(--text)!important;background:var(--bg-card);transition:var(--t);
}
.contact-link:hover{border-color:var(--accent);color:var(--accent)!important;transform:translateX(4px)}
.contact-icon{display:flex;align-items:center;justify-content:center;width:18px;height:18px;color:var(--accent);flex-shrink:0}
.contact-icon svg{width:18px;height:18px;fill:currentColor}
.contact-link:hover .contact-icon{color:var(--accent)}
.contact-link span{font-family:var(--font-mono);font-size:0.82rem}
.contact-form{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:32px;display:flex;flex-direction:column;gap:20px}
.form-group{display:flex;flex-direction:column;gap:8px}
.form-group label{font-family:var(--font-mono);font-size:0.75rem;text-transform:uppercase;letter-spacing:0.08em;color:var(--text-muted)}
.form-group input,.form-group textarea{
  padding:12px 16px;background:var(--bg);border:1px solid var(--border);border-radius:6px;
  color:var(--text);font-family:var(--font-body);font-size:0.9rem;
  outline:none;transition:var(--t);resize:vertical;
}
.form-group input:focus,.form-group textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-dim)}
.form-group input::placeholder,.form-group textarea::placeholder{color:var(--text-dim)}
.form-success{display:none;text-align:center;padding:24px;color:var(--green);font-family:var(--font-mono);font-size:0.9rem}
.form-success.show{display:block}
.form-status{
  text-align:center;padding:32px;
  border:1px solid var(--border);border-radius:var(--radius);
  background:var(--bg-card);font-family:var(--font-mono);
}
.form-status-success,.form-status-info{
  border-color:var(--green);
  background:color-mix(in srgb,var(--green) 8%,var(--bg-card));
}
.form-status-error{
  border-color:var(--red);
  background:color-mix(in srgb,var(--red) 8%,var(--bg-card));
}
.form-status-icon{font-size:2rem;margin-bottom:8px}
.form-status strong{display:block;font-size:1rem;margin-bottom:4px}
.form-status span{display:block;font-size:0.82rem;color:var(--text-muted)}
#contact-form button:disabled{opacity:0.6;cursor:not-allowed}

/* ── Footer ────────────────────────────────────────────── */
.footer{padding:32px 0;border-top:1px solid var(--border)}
.footer-inner{
  display:flex;justify-content:space-between;align-items:center;
  flex-wrap:wrap;gap:16px;
}
.footer-copy{font-family:var(--font-mono);font-size:0.78rem;color:var(--text-dim)}
.footer-links{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.footer-link{font-family:var(--font-mono);font-size:0.75rem;color:var(--text-muted);transition:var(--t);padding:2px 4px}
.footer-link:hover{color:var(--accent)}
.footer-sep{font-family:var(--font-mono);font-size:0.75rem;color:var(--border-hi)}
.footer-top{font-family:var(--font-mono);font-size:0.75rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.06em;transition:var(--t)}
.footer-top:hover{color:var(--accent)}

/* ── Reveal Animation ─────────────────────────────────── */
.reveal{opacity:0;transform:translateY(20px);transition:opacity 0.6s ease,transform 0.6s ease}
.reveal.revealed{opacity:1;transform:translateY(0)}

/* ── Responsive ────────────────────────────────────────── */
@media(max-width:1024px){
  .hero-stats{overflow-x:auto}
  .stat{padding:16px 20px;min-width:100px}
}
@media(max-width:768px){
  .top-bar{display:none}
  .theme-toggle{top:16px}
  .nav{top:0}
  .hero{padding:calc(var(--nav-h) + 48px) 24px 80px}
  .about-grid,.contact-grid{grid-template-columns:1fr}
  .hero-stats{flex-direction:column}
  .stat-divider{width:auto;height:1px;margin:0 12px}
  .nav-links{gap:16px}
  .skills-grid,.projects-grid{grid-template-columns:1fr}
  .footer-inner{flex-direction:column;align-items:center;text-align:center}
}
@media(max-width:480px){
  .hero-actions{flex-direction:column;align-items:center}
  .btn{width:100%;justify-content:center}
}