/* ===== Tokens ===== */
:root{
  --bg:#0d1113;
  --bg-alt:#101517;
  --surface:#161b1e;
  --surface-2:#1c2226;
  --border:#262e33;
  --border-soft:#1d2529;
  --text:#e8edee;
  --text-dim:#8fa0a6;
  --text-faint:#5c6b70;
  --accent:#f5a623;
  --accent-soft:rgba(245,166,35,0.12);
  --accent-2:#4fd1c5;
  --accent-2-soft:rgba(79,209,197,0.12);
  --font-display:'Space Grotesk', 'Inter', sans-serif;
  --font-body:'Inter', sans-serif;
  --font-mono:'JetBrains Mono', monospace;
  --max-w:1120px;
  --radius:14px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; scroll-behavior:auto !important;}
}

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3{font-family:var(--font-display);margin:0;font-weight:600;}
p{margin:0;}

.skip-link{
  position:absolute; left:-999px; top:0;
  background:var(--accent); color:#0d1113; padding:10px 16px;
  z-index:200; border-radius:0 0 8px 0; font-weight:600;
}
.skip-link:focus{left:0;}

/* ambient background grid */
.bg-grid{
  position:fixed; inset:0; z-index:0; pointer-events:none;
  background-image:
    linear-gradient(to right, var(--border-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border-soft) 1px, transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 0%, black 0%, transparent 70%);
  mask-image:radial-gradient(ellipse 80% 60% at 50% 0%, black 0%, transparent 70%);
  opacity:0.5;
}

/* focus visibility */
a:focus-visible, button:focus-visible{
  outline:2px solid var(--accent-2);
  outline-offset:3px;
  border-radius:4px;
}

.section-inner{
  max-width:var(--max-w);
  margin:0 auto;
  padding:0 28px;
  position:relative;
  z-index:1;
}

/* ===== Nav ===== */
.nav{
  position:sticky; top:0; z-index:100;
  background:rgba(13,17,19,0.82);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border-soft);
}
.nav-inner{
  max-width:var(--max-w);
  margin:0 auto;
  padding:16px 28px;
  display:flex; align-items:center; justify-content:space-between;
  gap:24px;
}
.nav-brand{
  font-family:var(--font-display);
  font-weight:700;
  font-size:1.15rem;
  letter-spacing:0.02em;
}
.nav-brand-dot{color:var(--accent);}
.nav-links{display:flex; gap:28px;}
.nav-links a{
  font-size:0.92rem; color:var(--text-dim); font-weight:500;
  transition:color 0.2s ease;
  position:relative;
}
.nav-links a:hover{color:var(--text);}
.nav-links a::after{
  content:''; position:absolute; left:0; bottom:-4px; height:1px; width:0;
  background:var(--accent); transition:width 0.25s ease;
}
.nav-links a:hover::after{width:100%;}
.nav-cta{
  font-size:0.85rem; font-weight:600;
  border:1px solid var(--border);
  padding:9px 16px; border-radius:999px;
  color:var(--text); white-space:nowrap;
  transition:border-color 0.2s ease, background 0.2s ease;
}
.nav-cta:hover{border-color:var(--accent); background:var(--accent-soft);}
.nav-toggle{
  display:none; background:none; border:none; cursor:pointer;
  width:32px; height:24px; flex-direction:column; justify-content:space-between; padding:0;
}
.nav-toggle span{display:block; height:2px; background:var(--text); border-radius:2px;}
.nav-mobile{
  display:none; flex-direction:column; padding:0 28px 20px;
  gap:4px;
}
.nav-mobile a{
  padding:12px 4px; border-top:1px solid var(--border-soft);
  color:var(--text-dim); font-size:0.95rem;
}
.nav.is-open .nav-mobile{display:flex;}

@media (max-width:820px){
  .nav-links, .nav-cta{display:none;}
  .nav-toggle{display:flex;}
}

/* ===== Hero ===== */
.hero{
  position:relative; z-index:1;
  padding:72px 0 60px;
}
.hero-inner{
  max-width:var(--max-w);
  margin:0 auto;
  padding:0 28px;
  display:grid;
  grid-template-columns:1.05fr 0.95fr;
  gap:56px;
  align-items:center;
}
.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--font-mono);
  font-size:0.78rem; color:var(--accent-2);
  letter-spacing:0.02em;
  margin-bottom:22px;
}
.eyebrow-dot{
  width:7px; height:7px; border-radius:50%;
  background:var(--accent-2);
  box-shadow:0 0 0 4px var(--accent-2-soft);
  animation:pulse 2.4s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{opacity:1;}
  50%{opacity:0.4;}
}
.hero-title{
  font-size:clamp(2.6rem, 5.2vw, 4rem);
  line-height:1.02;
  letter-spacing:-0.02em;
  margin-bottom:10px;
}
.hero-role{
  font-family:var(--font-mono);
  font-size:1.05rem;
  color:var(--text-dim);
  margin-bottom:22px;
}
.hero-role-sep{color:var(--accent); margin:0 10px;}
.hero-desc{
  max-width:52ch;
  color:var(--text-dim);
  font-size:1.03rem;
  margin-bottom:32px;
}
.hero-actions{display:flex; gap:14px; flex-wrap:wrap; margin-bottom:40px;}
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:13px 24px; border-radius:999px;
  font-weight:600; font-size:0.94rem;
  transition:transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  border:1px solid transparent;
}
.btn-primary{
  background:var(--accent); color:#171008;
}
.btn-primary:hover{
  box-shadow:0 8px 24px -8px var(--accent-soft), 0 0 0 4px var(--accent-soft);
  transform:translateY(-1px);
}
.btn-ghost{
  border-color:var(--border); color:var(--text);
}
.btn-ghost:hover{border-color:var(--accent-2); background:var(--accent-2-soft);}

.hero-meta{
  display:flex; gap:34px; margin:0;
  padding-top:26px; border-top:1px solid var(--border-soft);
  max-width:52ch;
}
.hero-meta dt{
  font-family:var(--font-mono); font-size:0.72rem;
  color:var(--text-faint); text-transform:uppercase; letter-spacing:0.05em;
  margin-bottom:5px;
}
.hero-meta dd{margin:0; font-size:0.92rem; font-weight:500;}

/* hero visual / photo */
.hero-visual{display:flex; justify-content:center;}
.photo-frame{
  width:100%; max-width:420px;
  aspect-ratio:1/1;
  border-radius:var(--radius);
  overflow:hidden;
  position:relative;
  background:var(--surface);
  border:1px solid var(--border);
  box-shadow:0 30px 60px -30px rgba(0,0,0,0.6);
}
.photo-frame::after{
  content:'';
  position:absolute; inset:0;
  border-radius:var(--radius);
  box-shadow:inset 0 0 0 1px rgba(245,166,35,0.15);
  pointer-events:none;
}
.photo-img{
  width:100%; height:100%;
  object-fit:cover;
  display:block;
  filter:grayscale(15%) contrast(1.03);
}

.hero-scroll{
  display:flex; align-items:center; gap:8px; justify-content:center;
  margin-top:56px;
  font-family:var(--font-mono); font-size:0.72rem; letter-spacing:0.08em;
  text-transform:uppercase; color:var(--text-faint);
}
.hero-scroll span{
  width:1px; height:22px; background:var(--border);
  position:relative; overflow:hidden;
}
.hero-scroll span::after{
  content:''; position:absolute; top:-100%; left:0; width:100%; height:100%;
  background:var(--accent);
  animation:scrollLine 1.8s ease-in-out infinite;
}
@keyframes scrollLine{
  0%{top:-100%;} 60%{top:100%;} 100%{top:100%;}
}

@media (max-width:900px){
  .hero-inner{grid-template-columns:1fr; gap:44px;}
  .hero-visual{order:-1;}
}

/* ===== Sections shared ===== */
.section{
  padding:96px 0;
  position:relative; z-index:1;
}
.section-alt{
  background:var(--bg-alt);
  border-top:1px solid var(--border-soft);
  border-bottom:1px solid var(--border-soft);
}
.kicker{
  font-family:var(--font-mono);
  font-size:0.78rem;
  color:var(--accent);
  letter-spacing:0.08em;
  text-transform:uppercase;
  margin-bottom:14px;
}
.section-title{
  font-size:clamp(1.7rem,3vw,2.3rem);
  margin-bottom:14px;
  letter-spacing:-0.01em;
}
.section-sub{
  color:var(--text-dim);
  max-width:56ch;
  margin-bottom:48px;
  font-size:1rem;
}

/* reveal on scroll */
.reveal{opacity:0; transform:translateY(18px); transition:opacity 0.7s ease, transform 0.7s ease;}
.reveal.is-visible{opacity:1; transform:translateY(0);}

/* ===== About ===== */
.about-grid{
  display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:start;
}
.about-lead{
  font-size:clamp(1.35rem,2.4vw,1.75rem);
  line-height:1.35;
  letter-spacing:-0.01em;
}
.about-body p{color:var(--text-dim); margin-bottom:18px; font-size:1rem;}
.about-body p:last-child{margin-bottom:0;}
@media (max-width:760px){
  .about-grid{grid-template-columns:1fr; gap:26px;}
}

/* ===== Timeline ===== */
.timeline{
  position:relative;
  padding-left:28px;
  border-left:1px solid var(--border);
}
.timeline-item{
  position:relative;
  padding-bottom:44px;
}
.timeline-item:last-child{padding-bottom:0;}
.timeline-marker{
  position:absolute; left:-33px; top:5px;
  width:9px; height:9px; border-radius:50%;
  background:var(--bg); border:2px solid var(--accent);
}
.timeline-head{
  display:flex; flex-wrap:wrap; align-items:baseline; gap:10px 16px;
  margin-bottom:4px;
}
.timeline-head h3{font-size:1.15rem;}
.timeline-parttime{color:var(--text-faint); font-weight:400; font-size:0.85rem;}
.timeline-date{
  font-family:var(--font-mono); font-size:0.78rem; color:var(--text-faint);
}
.timeline-org{color:var(--accent-2); font-weight:500; margin-bottom:12px; font-size:0.95rem;}
.timeline-list li{
  color:var(--text-dim); font-size:0.96rem; margin-bottom:7px;
  padding-left:18px; position:relative;
}
.timeline-list li::before{
  content:'—'; position:absolute; left:0; color:var(--text-faint);
}

/* ===== Skills ===== */
.skills-grid{
  display:grid; grid-template-columns:1fr 1fr; gap:36px 48px;
}
.skill-group h3{
  margin-bottom:16px;
}
.flag{
  font-family:var(--font-mono); font-size:0.88rem;
  color:var(--accent);
}
.tag-row{display:flex; flex-wrap:wrap; gap:9px;}
.tag{
  font-size:0.85rem; padding:7px 13px;
  border:1px solid var(--border); border-radius:999px;
  color:var(--text-dim);
  transition:border-color 0.2s ease, color 0.2s ease;
}
.tag:hover{border-color:var(--accent-2); color:var(--text);}
.tag-mono{font-family:var(--font-mono); font-size:0.78rem;}
@media (max-width:760px){
  .skills-grid{grid-template-columns:1fr;}
}

/* ===== Projects ===== */
.projects-list{display:flex; flex-direction:column; gap:2px;}
.project{
  display:grid; grid-template-columns:1fr 220px; gap:36px;
  padding:36px 28px;
  border:1px solid var(--border);
  border-radius:var(--radius);
  background:var(--surface);
  margin-bottom:18px;
  transition:border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}
.project:hover{
  border-color:var(--accent-2);
  transform:translateY(-2px);
  box-shadow:0 20px 40px -28px rgba(0,0,0,0.7);
}
.project-featured{
  border-color:var(--accent);
  background:linear-gradient(180deg, rgba(245,166,35,0.05), var(--surface) 40%);
}
.project-title{
  font-size:1.2rem; margin-bottom:12px;
  display:flex; align-items:center; gap:12px; flex-wrap:wrap;
}
.project-type{
  font-family:var(--font-mono); font-size:0.68rem; font-weight:500;
  color:var(--accent); border:1px solid var(--accent-soft);
  background:var(--accent-soft);
  padding:3px 9px; border-radius:999px;
  text-transform:uppercase; letter-spacing:0.04em;
}
.project-desc{color:var(--text-dim); font-size:0.97rem; margin-bottom:16px; max-width:60ch;}
.project-points li{
  color:var(--text-dim); font-size:0.92rem; margin-bottom:8px;
  padding-left:18px; position:relative;
}
.project-points li::before{
  content:'—'; position:absolute; left:0; color:var(--text-faint);
}
.project-side{display:flex; align-items:flex-start;}
.tag-row-mono{align-content:flex-start;}

@media (max-width:760px){
  .project{grid-template-columns:1fr; gap:18px;}
}

/* ===== Education / Certificate split ===== */
.split-grid{
  display:grid; grid-template-columns:1fr 1fr; gap:48px;
}
.split-title{font-size:1.3rem; margin-bottom:8px;}
.split-sub{color:var(--text-dim); font-size:0.96rem; margin-bottom:8px;}
.split-date{font-family:var(--font-mono); font-size:0.78rem; color:var(--text-faint);}
@media (max-width:760px){
  .split-grid{grid-template-columns:1fr; gap:36px;}
}

/* ===== Contact ===== */
.section-contact{
  text-align:center;
  padding-bottom:120px;
}
.contact-title{
  font-size:clamp(1.9rem,4vw,2.7rem);
  letter-spacing:-0.02em;
  line-height:1.15;
  margin-bottom:18px;
}
.section-contact .section-sub{margin-left:auto; margin-right:auto;}
.contact-links{
  display:grid; grid-template-columns:repeat(4,1fr);
  gap:1px; background:var(--border);
  border:1px solid var(--border); border-radius:var(--radius);
  overflow:hidden; margin-top:44px;
}
.contact-link{
  background:var(--surface);
  padding:26px 18px;
  display:flex; flex-direction:column; gap:8px; align-items:center;
  transition:background 0.2s ease;
}
.contact-link:hover{background:var(--surface-2);}
.contact-label{
  font-family:var(--font-mono); font-size:0.68rem; text-transform:uppercase;
  letter-spacing:0.06em; color:var(--text-faint);
}
.contact-value{font-size:0.92rem; font-weight:500; word-break:break-word;}
@media (max-width:700px){
  .contact-links{grid-template-columns:1fr 1fr;}
}

/* ===== Footer ===== */
.footer{
  border-top:1px solid var(--border-soft);
  padding:26px 0;
  position:relative; z-index:1;
}
.footer-inner{
  display:flex; justify-content:space-between;
  font-family:var(--font-mono); font-size:0.76rem; color:var(--text-faint);
}