/* ============================================================
   Zeyd Ali — portfolio styles
   Theme tokens live in :root (light) and [data-theme="dark"].
   Change a colour once here and it changes everywhere.
   ============================================================ */

:root{
  --paper:#E8EAE6;
  --card:#F3F4F1;
  --ink:#16202A;
  --ink-soft:#4E5B66;
  --rule:rgba(22,32,42,.14);
  --blue:#1F4FD8;
  --magenta:#D6246E;
  --teal:#0E8F87;
  --grid:rgba(22,32,42,.055);
  --nav-bg:rgba(232,234,230,.86);
  --shadow:var(--ink);

  --display:"Bricolage Grotesque",system-ui,sans-serif;
  --body:"Instrument Sans",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;
  --shell:1180px;
}

[data-theme="dark"]{
  --paper:#10161C;
  --card:#18202A;
  --ink:#E7EAE6;
  --ink-soft:#93A1AC;
  --rule:rgba(231,234,230,.16);
  --blue:#7C9BFF;
  --magenta:#FF6FA5;
  --teal:#3ECDBF;
  --grid:rgba(231,234,230,.045);
  --nav-bg:rgba(16,22,28,.86);
  --shadow:rgba(231,234,230,.5);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{
  margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);
  font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:26px 26px;
  transition:background-color .35s ease,color .35s ease;
}
img,svg{max-width:100%}
a{color:inherit}
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:clamp(20px,5vw,56px)}

/* ---------- type ---------- */
.mono{font-family:var(--mono);font-size:12px;letter-spacing:.13em;text-transform:uppercase}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-soft)}
h1,h2,h3{font-family:var(--display);font-weight:800;letter-spacing:-.025em;line-height:1.02;margin:0}
h2{font-size:clamp(30px,4.6vw,48px)}
h3{font-size:22px;letter-spacing:-.015em;line-height:1.2}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}

.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:var(--paper);padding:12px 18px;z-index:99}
.skip:focus{left:12px;top:12px}

/* ---------- nav ---------- */
header.nav{position:sticky;top:0;z-index:50;background:var(--nav-bg);backdrop-filter:blur(10px);border-bottom:1px solid var(--rule)}
.nav-in{display:flex;align-items:center;justify-content:space-between;gap:16px;height:66px}
.brand{font-family:var(--display);font-weight:800;font-size:19px;letter-spacing:-.02em;text-decoration:none;display:flex;align-items:center;gap:10px;white-space:nowrap}
.brand .dot{width:9px;height:9px;background:var(--magenta);border-radius:50%;display:inline-block}
.nav-right{display:flex;align-items:center;gap:10px}
.links{display:flex;gap:2px;align-items:center}
.links a{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;text-decoration:none;color:var(--ink-soft);padding:8px 10px;border-radius:2px}
.links a:hover{color:var(--ink);background:color-mix(in srgb,var(--blue) 12%,transparent)}
.links a.active{color:var(--blue)}
.links a.active::before{content:"/";color:var(--magenta);margin-right:3px}

/* theme toggle */
.theme-btn{
  width:38px;height:38px;display:grid;place-items:center;cursor:pointer;
  background:transparent;border:1px solid var(--rule);border-radius:2px;color:var(--ink);
  transition:border-color .2s ease,transform .2s ease;flex:none;
}
.theme-btn:hover{border-color:var(--ink);transform:translateY(-1px)}
.theme-btn svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round}
.theme-btn .moon{display:none}
[data-theme="dark"] .theme-btn .sun{display:none}
[data-theme="dark"] .theme-btn .moon{display:block}

.menu-btn{display:none;font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;background:none;border:1px solid var(--rule);padding:10px 13px;border-radius:2px;cursor:pointer;color:var(--ink)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--mono);font-size:12px;letter-spacing:.11em;text-transform:uppercase;text-decoration:none;padding:13px 20px;border:1px solid var(--ink);border-radius:2px;transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease}
.btn:hover{transform:translate(-2px,-2px);box-shadow:3px 3px 0 var(--shadow)}
.btn-solid{background:var(--ink);color:var(--paper)}
.btn-solid:hover{box-shadow:3px 3px 0 var(--magenta)}
.btn-ghost{background:transparent;color:var(--ink)}

/* ---------- hero ---------- */
.hero{padding:clamp(52px,9vw,104px) 0 44px}
.hero h1{font-size:clamp(44px,8.4vw,92px);max-width:14ch}
.hero h1 em{font-style:normal;color:var(--blue)}
.hero .lede{font-size:clamp(17px,2vw,20px);max-width:56ch;color:var(--ink-soft);margin-top:24px}
.hero .cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-meta{display:flex;flex-wrap:wrap;gap:8px 26px;margin-top:34px;color:var(--ink-soft)}

/* ---------- signature chart ---------- */
.plot{margin-top:56px;border-top:1px solid var(--rule);padding-top:22px}
.plot-head{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;align-items:baseline;margin-bottom:14px}
.plot-head .note{color:var(--magenta)}
#chart{display:block;width:100%;height:auto}
.bar{fill:var(--blue);opacity:.26;transition:opacity .15s ease}
.bar.hot{opacity:.65}
.bar-hit{fill:transparent;cursor:crosshair}
.readout{font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--ink-soft);margin-top:10px;min-height:18px}
.readout b{color:var(--ink);font-weight:500}

/* ---------- sections ---------- */
section{padding:clamp(64px,9vw,110px) 0;border-top:1px solid var(--rule)}
.sec-head{display:grid;grid-template-columns:180px 1fr;gap:28px;align-items:start;margin-bottom:44px}
.sec-head .eyebrow{padding-top:12px}
.sec-head .intro{max-width:60ch;color:var(--ink-soft);margin-top:18px}
.body-grid{display:grid;grid-template-columns:180px 1fr;gap:28px}

/* ---------- about ---------- */
.about p{max-width:64ch;font-size:19px}
.about .pull{font-family:var(--display);font-weight:700;font-size:clamp(21px,2.6vw,27px);line-height:1.28;letter-spacing:-.015em;border-left:3px solid var(--magenta);padding-left:20px;margin:30px 0 0;max-width:44ch}

/* ---------- project filter ---------- */
.filter{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}
.filter button{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;background:transparent;border:1px solid var(--rule);color:var(--ink-soft);padding:10px 15px;border-radius:2px;cursor:pointer;transition:all .18s ease}
.filter button:hover{border-color:var(--ink);color:var(--ink)}
.filter button[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.filter .count{opacity:.6;margin-left:7px}

/* ---------- projects ---------- */
.projects{display:grid;gap:20px}
.proj{background:var(--card);border:1px solid var(--rule);border-radius:3px;padding:clamp(22px,3vw,34px);position:relative;overflow:hidden}
.proj::after{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--accent)}
.proj[hidden]{display:none}
.proj-top{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 18px;align-items:baseline}
.proj-top h3{flex:1 1 340px;max-width:34ch}
.proj-top .when{color:var(--ink-soft);flex:none;white-space:nowrap}
.badges{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px}
.kind{display:inline-block;font-family:var(--mono);font-size:11px;letter-spacing:.09em;text-transform:uppercase;color:var(--accent);border:1px solid var(--accent);padding:3px 8px;border-radius:2px}
.kind.alt{color:var(--ink-soft);border-color:var(--rule)}
.stat{font-family:var(--display);font-weight:800;font-size:clamp(28px,4vw,40px);letter-spacing:-.03em;color:var(--accent);line-height:1;margin:18px 0 4px}
.stat-label{color:var(--ink-soft);display:block;margin-bottom:18px}
.proj ul{margin:14px 0 0;padding-left:19px}
.proj li{margin-bottom:8px}
.proj li::marker{color:var(--accent)}
.tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:20px}
.tag{font-family:var(--mono);font-size:11px;letter-spacing:.09em;text-transform:uppercase;border:1px solid var(--rule);padding:5px 10px;border-radius:2px;color:var(--ink-soft)}
.proj-links{display:flex;gap:16px;flex-wrap:wrap;margin-top:20px}
.proj-links a{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--blue);text-decoration:none;border-bottom:1px solid color-mix(in srgb,var(--blue) 40%,transparent);padding-bottom:2px}
.proj-links a:hover{border-bottom-color:var(--blue)}

/* ---------- timelines ---------- */
.tl{display:grid;gap:0}
.tl-item{display:grid;grid-template-columns:150px 1fr;gap:26px;padding:26px 0;border-top:1px solid var(--rule)}
.tl-item:first-child{border-top:0;padding-top:0}
.tl-when{color:var(--ink-soft);padding-top:5px}
.tl-body h3 span{display:block;font-family:var(--body);font-weight:500;font-size:16px;color:var(--ink-soft);letter-spacing:0;margin-top:6px}
.tl-body p{margin-top:12px;max-width:60ch;color:var(--ink-soft)}
.grade{display:inline-block;font-family:var(--mono);font-size:11px;letter-spacing:.09em;text-transform:uppercase;background:color-mix(in srgb,var(--teal) 16%,transparent);color:var(--teal);padding:4px 9px;border-radius:2px;margin-top:12px}

/* ---------- skills ---------- */
.skills{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1px;background:var(--rule);border:1px solid var(--rule);border-radius:3px;overflow:hidden}
.skill-col{background:var(--card);padding:26px}
.skill-col h3{font-size:15px;font-family:var(--mono);font-weight:500;letter-spacing:.11em;text-transform:uppercase;color:var(--ink-soft)}
.skill-col ul{list-style:none;margin:16px 0 0;padding:0}
.skill-col li{padding:7px 0;border-bottom:1px dashed var(--rule);font-size:16px}
.skill-col li:last-child{border-bottom:0}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.contact-list{list-style:none;margin:0;padding:0}
.contact-list li{border-top:1px solid var(--rule);padding:16px 0}
.contact-list li:first-child{border-top:0}
.contact-list a,.contact-list .v{text-decoration:none;font-size:18px;display:block;word-break:break-word}
.contact-list a:hover{color:var(--blue)}
.contact-list .k{color:var(--ink-soft);margin-bottom:5px}
.contact-cta{background:var(--ink);color:var(--paper);border-radius:3px;padding:32px}
.contact-cta h3{color:var(--paper);font-size:26px}
.contact-cta p{color:color-mix(in srgb,var(--paper) 70%,transparent);margin-top:14px}
.contact-cta .btn{border-color:var(--paper);color:var(--paper);margin-top:22px}
.contact-cta .btn:hover{box-shadow:3px 3px 0 var(--magenta)}

footer{border-top:1px solid var(--rule);padding:30px 0 44px;color:var(--ink-soft)}
.foot-in{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between}

/* ---------- motion ---------- */
.rise{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.rise.in{opacity:1;transform:none}
:focus-visible{outline:2px solid var(--magenta);outline-offset:3px}

@media (max-width:900px){
  .sec-head,.body-grid{grid-template-columns:1fr;gap:12px}
  .sec-head .eyebrow{padding-top:0}
  .tl-item{grid-template-columns:1fr;gap:8px}
  .contact-grid{grid-template-columns:1fr;gap:28px}
  .menu-btn{display:block}
  .links{position:absolute;top:66px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:var(--paper);border-bottom:1px solid var(--rule);padding:8px 20px 16px;display:none}
  .links.open{display:flex}
  .links a{padding:13px 4px;border-bottom:1px solid var(--rule)}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  .rise{opacity:1;transform:none}
}

/* inline links inside body copy */
.intro a{color:var(--blue);text-decoration:none;border-bottom:1px solid color-mix(in srgb,var(--blue) 40%,transparent)}
.intro a:hover{border-bottom-color:var(--blue)}