/* =========================================================
   P4J∆R — PORTFOLIO STYLESHEET
   Dark / editorial / archive aesthetic. Vanilla CSS.
   ========================================================= */

:root{
  --bg:#0a0a0b;
  --bg-raised:#111113;
  --panel:#141416;
  --line:rgba(236,236,236,.10);
  --line-strong:rgba(236,236,236,.20);
  --text:#ECECEC;
  --text-soft:#EAEAEA;
  --text-mid:#9E9E9E;
  --text-dim:#96969b;
  --text-faint:#5c5c61;
  --accent:#e7b34d;
  --stack-bar:#ECECEC;
  --signal:#7fdc8f;
  --danger:#ff6b5e;

  --radius-sm:2px;
  --radius-md:4px;

  --mono:'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --display:'Archivo Black', 'Arial Black', sans-serif;
  --body:'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --dur-fast:.3s;
  --dur:.3s;
  --dur-slow:.6s;
  --ease:cubic-bezier(.22,.68,0,1);

  --wrap:1180px;
  --gutter:clamp(20px, 5vw, 64px);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important;}
}

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

img{max-width:100%; display:block;}
a{color:inherit; text-decoration:none;}
ul,ol{list-style:none; margin:0; padding:0;}
dl,dt,dd{margin:0;}
button{font:inherit; color:inherit; background:none; border:none; cursor:pointer;}
input{font:inherit; color:inherit;}

.mono{font-family:var(--mono);}
.dim{color:var(--text-dim);}
.sr-only{position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); border:0;}

.skip-link{
  position:absolute; left:-999px; top:0; z-index:200;
  background:var(--accent); color:#0a0a0b; padding:10px 16px; font-family:var(--mono);
}
.skip-link:focus{left:12px; top:12px;}

::selection{background:var(--accent); color:#0a0a0b;}

/* scrollbar */
::-webkit-scrollbar{width:10px; height:10px;}
::-webkit-scrollbar-track{background:var(--bg);}
::-webkit-scrollbar-thumb{background:var(--line-strong); border-radius:8px;}
::-webkit-scrollbar-thumb:hover{background:var(--text-faint);}

:focus-visible{outline:2px solid var(--accent); outline-offset:3px;}

.wrap{
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

/* background texture */
.noise{
  position:fixed; inset:0; z-index:0; pointer-events:none; opacity:.035; mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.grid-overlay{
  position:fixed; inset:0; z-index:0; pointer-events:none; opacity:.5;
  background-image:linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse at 50% 0%, black, transparent 75%);
  opacity:.15;
}

main, header, footer{position:relative; z-index:1;}

/* ---------- HEADER ---------- */
.site-header{
  position:sticky; top:0; z-index:50;
  backdrop-filter:blur(10px);
  background:rgba(10,10,11,.75);
  border-bottom:1px solid var(--line);
}
.header-row{
  display:flex; align-items:center; justify-content:space-between;
  height:56px;
}
.brand{display:flex; align-items:center; gap:8px;}
.brand-mark{
  width:26px; height:26px; display:grid; place-items:center;
  border:1px solid var(--line-strong); border-radius:var(--radius-sm);
  color:var(--text);
}
.brand-name{font-family:var(--mono); font-weight:600; letter-spacing:.04em; font-size:14px;}
.header-meta{
  display:flex; align-items:center; gap:8px;
  font-size:12px; color:var(--text-dim);
}
.header-meta .dot{
  width:6px; height:6px; border-radius:50%; background:var(--signal);
  box-shadow:0 0 8px var(--signal);
}
.meta-sep{color:var(--text-faint);}

/* ---------- NAV DROPDOWN ---------- */
.nav-menu{position:relative; margin-left:6px;}
.nav-toggle{
  width:28px; height:28px; display:grid; place-items:center;
  border:1px solid var(--line-strong); border-radius:var(--radius-sm);
  color:var(--text); font-size:16px; line-height:1;
  transition:border-color .3s var(--ease), background .3s var(--ease);
}
.nav-toggle:hover, .nav-toggle[aria-expanded="true"]{background:var(--bg-raised); border-color:var(--text-dim);}
.nav-dropdown{
  position:absolute; top:calc(100% + 10px); right:0; z-index:60;
  min-width:200px; padding:8px;
  background:rgba(17,17,19,.85); backdrop-filter:blur(14px);
  border:1px solid var(--line-strong); border-radius:var(--radius-md);
  display:flex; flex-direction:column; gap:2px;
  opacity:0; transform:translateY(-6px);
  transition:opacity .3s var(--ease), transform .3s var(--ease);
}
.nav-dropdown.open{opacity:1; transform:translateY(0);}
.nav-dropdown[hidden]{display:none;}
.nav-dropdown a{
  font-family:var(--mono); font-size:12.5px; letter-spacing:.04em; color:var(--text-dim);
  padding:9px 12px; border-radius:var(--radius-sm);
  transition:background .3s var(--ease), color .3s var(--ease);
}
.nav-dropdown a:hover, .nav-dropdown a:focus-visible{background:var(--panel); color:var(--text-soft);}

/* ---------- HERO ---------- */
.hero{padding:64px 0 56px;}
.eyebrow{
  display:flex; gap:10px; align-items:center; font-size:13px;
  color:var(--text-dim); margin:0 0 20px;
}
.eyebrow-tag{
  border:1px solid var(--line-strong); padding:3px 8px; border-radius:var(--radius-sm);
  color:var(--text);
}
.hero-title{
  font-family:var(--display);
  font-size:clamp(56px, 13vw, 148px);
  line-height:.92;
  letter-spacing:-.01em;
  margin:0 0 28px;
  text-transform:uppercase;
}
.hero-title .line{display:block;}
.hero-title-a{color:var(--text-soft);}
.hero-title-b{color:var(--text-mid);}
.hero-lede{
  max-width:640px; font-size:clamp(17px,2.6vw,20.5px); color:var(--text-dim);
  margin:0 0 18px;
}
.current-line{
  font-size:13px; color:var(--text-faint); margin:0 0 32px;
  display:flex; gap:8px; align-items:baseline; min-height:20px;
}
.current-line-caret{color:var(--accent);}
.caret-blink{animation:blink 1s step-end infinite; color:var(--accent);}
@keyframes blink{50%{opacity:0;}}

.hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-bottom:48px;}
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:13px 22px; font-family:var(--mono); font-size:13px; letter-spacing:.04em;
  border-radius:var(--radius-sm); border:1px solid var(--line-strong);
  transition:transform var(--dur-fast) var(--ease), background var(--dur-fast), border-color var(--dur-fast), color var(--dur-fast);
}
.btn:hover, .btn:focus-visible{transform:translateY(-2px);}
.btn-solid{background:var(--text); color:var(--bg);}
.btn-solid:hover{background:var(--accent); border-color:var(--accent);}
.btn-outline{background:transparent; color:var(--text);}
.btn-outline:hover{border-color:var(--text); background:var(--bg-raised);}
.btn-ghost{background:transparent; color:var(--text-dim); border-color:transparent;}
.btn-ghost:hover{color:var(--text); border-color:var(--line-strong);}

.hero-grid{border-top:1px solid var(--line); padding-top:24px;}
.meta-panel{
  display:grid; grid-template-columns:repeat(3,1fr); gap:16px 24px;
  max-width:640px;
}
.meta-row{display:flex; flex-direction:column; gap:4px;}
.meta-row dt{font-size:11px; letter-spacing:.08em; color:var(--text-faint);}
.meta-row dd{font-size:14px; margin:0;}

/* ---------- MARQUEE ---------- */
.marquee{
  overflow:hidden; border-block:1px solid var(--line);
  background:var(--bg-raised);
  padding:12px 0;
}
.marquee-track{
  display:inline-flex; white-space:nowrap;
  font-family:var(--mono); font-size:13px; letter-spacing:.12em; color:var(--text-dim);
  animation:scrollLeft 26s linear infinite;
}
.marquee-track.marquee-reverse{animation-name:scrollRight;}
@keyframes scrollLeft{from{transform:translateX(0);} to{transform:translateX(-50%);}}
@keyframes scrollRight{from{transform:translateX(-50%);} to{transform:translateX(0);}}

/* ---------- SECTION SHARED ---------- */
.section{padding:96px 0;}
.section-head{margin-bottom:48px; max-width:720px;}
.section-tag{font-size:12px; color:var(--text-faint); letter-spacing:.1em; margin:0 0 10px;}
.section-title{
  font-family:var(--display); text-transform:uppercase;
  font-size:clamp(32px, 5.5vw, 56px); line-height:1; margin:0 0 14px;
}
.section-sub{color:var(--text-dim); margin:0; max-width:56ch; font-size:17.3px;}

/* ---------- PROJECTS ---------- */
/* ---------- PROJECTS CAROUSEL ---------- */
.carousel{
  position:relative; overflow:hidden; cursor:grab;
  border:1px solid var(--line);
}
.carousel.dragging{cursor:grabbing;}
.carousel-track{
  display:flex; gap:1px; background:var(--line);
  will-change:transform;
  user-select:none;
}
.project-card{
  background:var(--bg);
  display:flex; flex-direction:column;
  flex:0 0 clamp(260px, 32vw, 360px);
  transition:transform .5s var(--ease);
}
.project-card:hover{transform:translateY(-6px) rotate(var(--tilt,0deg));}
.project-thumb{
  display:block; aspect-ratio:16/10; overflow:hidden; background:var(--bg-raised);
  border-bottom:1px solid var(--line);
  position:relative;
}
.project-thumb img{width:100%; height:100%; object-fit:cover; transition:transform var(--dur-slow) var(--ease);}
.project-thumb:hover img{transform:scale(1.05);}
.project-thumb.thumb-fallback{display:grid; place-items:center;}
.project-thumb.thumb-fallback::after{
  content:"FILE\A PREVIEW\A UNAVAILABLE";
  white-space:pre; font-family:var(--mono); font-size:11px; color:var(--text-faint); text-align:center; line-height:1.6;
}
.project-thumb.thumb-fallback img{display:none;}
.project-body{padding:20px 22px 24px; display:flex; flex-direction:column; gap:8px; flex:1;}
.project-index{font-size:11px; color:var(--text-faint);}
.project-name{font-size:19px; margin:0; font-weight:700;}
.project-desc{font-size:15.2px; color:var(--text-dim); margin:0; flex:1;}
.project-open{
  font-size:12px; color:var(--text); align-self:flex-start; margin-top:6px;
  border-bottom:1px solid var(--line-strong); padding-bottom:2px;
  transition:border-color var(--dur-fast), color var(--dur-fast);
}
.project-open:hover, .project-open:focus-visible{color:var(--accent); border-color:var(--accent);}

/* ---------- BIOGRAPHY ---------- */
.bio-layout{
  display:grid; grid-template-columns:minmax(220px,320px) 1fr; gap:48px; margin-bottom:56px;
}
.bio-card{perspective:900px;}
.bio-card-inner{
  border:1px solid var(--line-strong); border-radius:var(--radius-md); overflow:hidden;
  background:var(--panel);
  transform-style:preserve-3d;
  transition:transform var(--dur-fast) linear;
  will-change:transform;
}
.bio-photo{width:100%; aspect-ratio:3/4; object-fit:cover; filter:grayscale(.25) contrast(1.05);}
.bio-card-tag{
  padding:10px 14px; font-size:11px; color:var(--text-faint); border-top:1px solid var(--line);
}
.bio-title{font-size:clamp(22px,3.4vw,30px); line-height:1.3; margin:0 0 18px;}
.bio-text{color:var(--text-dim); margin:0 0 28px; max-width:60ch; font-size:17.3px;}
.bio-meta{
  display:grid; grid-template-columns:repeat(4,auto); gap:20px; margin-bottom:24px;
  border-top:1px solid var(--line); border-bottom:1px solid var(--line); padding-block:16px;
}
.bio-meta > div{display:flex; flex-direction:column; gap:4px;}
.bio-meta dt{font-size:10px; color:var(--text-faint); letter-spacing:.08em;}
.bio-meta dd{font-size:13px; margin:0;}
.bio-habits{display:flex; flex-direction:column; gap:8px; font-size:14px; color:var(--text-dim);}

.pull-quote{
  border-left:2px solid var(--accent); padding-left:24px; margin:0;
}
.pull-quote p{
  font-family:var(--display); text-transform:uppercase; font-size:clamp(18px,3vw,30px);
  line-height:1.3; margin:0 0 12px;
}
.pull-quote cite{font-style:normal; color:var(--text-faint); font-size:12px;}

/* ---------- TIMELINE ---------- */
.timeline{
  position:relative; padding-left:32px; border-left:1px solid var(--line-strong);
  display:flex; flex-direction:column; gap:44px;
}
.timeline-item{position:relative; opacity:0; transform:translateY(16px); transition:opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);}
.timeline-item.in-view{opacity:1; transform:translateY(0);}
.timeline-marker{
  position:absolute; left:-38px; top:4px; width:9px; height:9px; border-radius:50%;
  background:var(--bg); border:2px solid var(--accent);
}
.timeline-index{font-size:12px; color:var(--text-faint); margin:0 0 6px;}
.timeline-name{font-size:22px; margin:0 0 8px;}
.timeline-note{color:var(--text-dim); margin:0 0 10px; max-width:56ch; font-size:17.3px;}
.timeline-label{
  display:inline-block; font-size:11px; color:var(--danger); border:1px solid currentColor; padding:2px 8px; border-radius:var(--radius-sm);
}

/* ---------- STACK ---------- */
.skill-list{display:flex; flex-direction:column; gap:14px; margin-bottom:40px;}
.skill-row{
  display:grid; grid-template-columns:28px 140px 1fr 60px; align-items:center; gap:16px;
  opacity:0; transform:translateX(-12px); transition:opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
}
.skill-row.in-view{opacity:1; transform:translateX(0);}
.skill-index{color:var(--text-faint); font-size:12px;}
.skill-name{font-size:15.2px;}
.skill-meter{
  position:relative; height:6px; background:var(--line); border-radius:4px; overflow:hidden;
}
.skill-meter::after{
  content:""; position:absolute; inset:0 auto 0 0; width:var(--v,0%);
  background:var(--stack-bar); border-radius:4px;
  transform:scaleX(0); transform-origin:left; transition:transform 1.1s var(--ease);
}
.skill-row.in-view .skill-meter::after{transform:scaleX(1);}
.skill-val{font-size:12px; color:var(--text-dim); text-align:right;}

.cert-note{border:1px dashed var(--line-strong); border-radius:var(--radius-md); padding:22px 24px;}
.cert-title{font-size:13px; margin:0 0 8px; color:var(--text);}
.cert-text{margin:0; color:var(--text-dim); font-size:15.2px;}

/* ---------- AI LAB ---------- */
.lab-panel{
  border:1px solid var(--line-strong); border-radius:var(--radius-md); background:var(--panel); overflow:hidden;
}
.lab-panel-head{
  display:flex; align-items:center; gap:10px; padding:12px 18px; border-bottom:1px solid var(--line);
  font-size:12px; color:var(--text-dim);
}
.lab-dot{width:7px; height:7px; border-radius:50%; background:var(--signal); box-shadow:0 0 6px var(--signal);}
.lab-clear{margin-left:auto; font-size:11px; color:var(--text-faint); border:1px solid var(--line-strong); padding:4px 10px; border-radius:var(--radius-sm); transition:color var(--dur-fast), border-color var(--dur-fast);}
.lab-clear:hover{color:var(--text); border-color:var(--text-dim);}

.lab-log{
  padding:20px; min-height:220px; max-height:420px; overflow-y:auto;
  display:flex; flex-direction:column; gap:16px;
}
.chat-msg{max-width:80%;}
.chat-role{font-size:10px; color:var(--text-faint); margin:0 0 4px; letter-spacing:.08em;}
.chat-text{margin:0; font-size:15.2px; line-height:1.6; white-space:pre-wrap;}
.chat-sys{max-width:100%; color:var(--text-dim);}
.chat-user{align-self:flex-end; text-align:right;}
.chat-user .chat-text{background:var(--bg-raised); padding:10px 14px; border-radius:var(--radius-md); display:inline-block;}
.chat-ai .chat-text{background:transparent; border-left:2px solid var(--accent); padding-left:12px;}
.chat-error .chat-text{color:var(--danger);}
.chat-meta{font-size:10px; color:var(--text-faint); margin-top:4px;}
.chat-loading{display:flex; gap:4px; padding-left:2px;}
.chat-loading span{width:5px; height:5px; border-radius:50%; background:var(--text-faint); animation:pulseDot 1s ease-in-out infinite;}
.chat-loading span:nth-child(2){animation-delay:.15s;}
.chat-loading span:nth-child(3){animation-delay:.3s;}
@keyframes pulseDot{0%,80%,100%{opacity:.25;}40%{opacity:1;}}

.lab-input-row{
  display:flex; gap:10px; padding:16px 18px; border-top:1px solid var(--line);
}
.lab-input-row input{
  flex:1; background:var(--bg); border:1px solid var(--line-strong); border-radius:var(--radius-sm);
  padding:12px 14px; font-size:14px;
}
.lab-input-row input:focus{outline:none; border-color:var(--accent);}

/* ---------- CONTACT ---------- */
.contact-actions{display:flex; gap:12px; margin-bottom:40px;}
.contact-list{display:grid; grid-template-columns:1fr 1fr; gap:1px; background:var(--line); border:1px solid var(--line);}
.contact-row{
  background:var(--bg); display:grid; grid-template-columns:28px 1fr auto; align-items:center; gap:14px;
  padding:18px 20px;
}
.contact-index{color:var(--text-faint); font-size:12px;}
.contact-name{font-size:14px;}
.contact-link{grid-column:2; font-size:13px; color:var(--text-dim); transition:color var(--dur-fast);}
.contact-link:hover, .contact-link:focus-visible{color:var(--accent);}
.contact-open{
  grid-column:3; grid-row:1/3; font-size:11px; color:var(--signal); border:1px solid currentColor; padding:3px 9px; border-radius:var(--radius-sm); justify-self:end;
}

/* ---------- FOOTER ---------- */
.site-footer{border-top:1px solid var(--line); padding:56px 0 28px; background:var(--bg-raised);}
.footer-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:32px; margin-bottom:36px;}
.footer-label{font-size:11px; color:var(--text-faint); margin:0 0 10px; letter-spacing:.08em;}
.footer-text{font-size:14px; color:var(--text-dim); margin:0; line-height:1.7;}
.footer-bottom{border-top:1px solid var(--line); padding-top:20px;}
.footer-bottom p{font-size:12px; color:var(--text-faint); margin:0;}

/* ---------- REVEAL (generic) ---------- */
.reveal{opacity:0; transform:translateY(14px); transition:opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);}
.reveal.in-view{opacity:1; transform:translateY(0);}

/* ---------- RESPONSIVE ---------- */
@media (max-width:860px){
  .bio-layout{grid-template-columns:1fr;}
  .bio-card{max-width:280px;}
  .meta-panel{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr; gap:24px;}
  .contact-list{grid-template-columns:1fr;}
  .bio-meta{grid-template-columns:repeat(2,auto);}
}
@media (max-width:520px){
  .hero{padding:44px 0 40px;}
  .section{padding:64px 0;}
  .hero-actions{flex-direction:column; align-items:stretch;}
  .hero-actions .btn{justify-content:center;}
  .project-card{flex-basis:82vw;}
  .skill-row{grid-template-columns:22px 1fr; row-gap:6px;}
  .skill-meter{grid-column:1/3;}
  .skill-val{grid-column:1/3; text-align:left;}
}