/* =========================================================
   Mohammad Zarif Joya — personal site
   Design tokens
   ========================================================= */
:root{
  --paper:      #EEF1EF;   /* pale, cool-blue-gray page background   */
  --paper-raised:#F7F8F6;  /* slightly lighter surface for cards      */
  --ink:        #16223A;   /* deep navy-black — headings, hero        */
  --ink-soft:   #29354C;   /* softened ink — body text on paper       */
  --mist:       #5D6B80;   /* muted slate — secondary / captions       */
  --line:       #CBD2D2;   /* hairline borders                        */
  --gold:       #B5852A;   /* achievement gold — degrees, milestones  */
  --teal:       #2C6259;   /* deep teal — systems / tech accent       */
  --rust:       #9C5A3C;   /* muted rust — language / culture accent  */
  --paper-dark: #E3E7E3;

  --font-display: "Fraunces", "Iowan Old Style", Georgia, serif;
  --font-body:    "Source Sans 3", "Segoe UI", system-ui, sans-serif;
  --font-mono:    "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --max: 1120px;
  --radius: 6px;
}

@media (prefers-color-scheme: dark){
  :root{ }
}

*,*::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; }
}

body{
  margin:0;
  background: var(--paper);
  color: var(--ink-soft);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img{ max-width:100%; display:block; }
a{ color: inherit; }

h1,h2,h3,h4{
  font-family: var(--font-display);
  color: var(--ink);
  margin: 0 0 .4em 0;
  line-height: 1.12;
  font-weight: 600;
}

p{ margin: 0 0 1em 0; }

.container{
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

.eyebrow{
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--teal);
  display:flex;
  align-items:center;
  gap:.6em;
  margin-bottom: .9em;
}
.eyebrow::before{
  content:"";
  width: 18px; height: 1px;
  background: var(--teal);
  display:inline-block;
}

:focus-visible{
  outline: 2.5px solid var(--gold);
  outline-offset: 3px;
}

/* ---------- header / nav ---------- */
.site-header{
  position: sticky; top:0; z-index: 50;
  background: rgba(238,241,239,.86);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding: 16px 28px;
  max-width: var(--max);
  margin: 0 auto;
}
.brand{
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--ink);
  text-decoration:none;
  display:flex;
  align-items:center;
  gap:.6em;
}
.brand-mark{
  width:34px; height:34px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  display:flex; align-items:center; justify-content:center;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .02em;
}
.nav-links{
  display:flex; gap: 28px;
  list-style:none; margin:0; padding:0;
  font-family: var(--font-mono);
  font-size: .84rem;
  letter-spacing: .03em;
}
.nav-links a{
  text-decoration:none;
  color: var(--ink-soft);
  padding: .3em 0;
  border-bottom: 1px solid transparent;
  transition: border-color .15s ease, color .15s ease;
}
.nav-links a:hover, .nav-links a.active{
  color: var(--teal);
  border-color: var(--teal);
}
.nav-toggle{ display:none; }

@media (max-width: 720px){
  .nav-links{
    position:fixed; inset: 62px 0 auto 0;
    background: var(--paper);
    flex-direction:column;
    gap:0;
    border-bottom:1px solid var(--line);
    padding: 6px 28px 18px;
    transform: translateY(-8px);
    opacity:0;
    pointer-events:none;
    transition: opacity .18s ease, transform .18s ease;
  }
  .nav-links.open{ opacity:1; transform:translateY(0); pointer-events:auto; }
  .nav-links li{ padding: 10px 0; border-top:1px solid var(--line); }
  .nav-toggle{
    display:flex; flex-direction:column; gap:5px;
    background:none; border:none; cursor:pointer; padding:6px;
  }
  .nav-toggle span{ width:22px; height:2px; background:var(--ink); display:block; }
}

/* ---------- hero ---------- */
.hero{
  position:relative;
  padding: 96px 0 84px;
  overflow:hidden;
  border-bottom: 1px solid var(--line);
}
.hero-grid{
  position:absolute; inset:0;
  background-image:
    linear-gradient(var(--paper-dark) 1px, transparent 1px),
    linear-gradient(90deg, var(--paper-dark) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(ellipse 70% 60% at 70% 20%, black 10%, transparent 75%);
  opacity: .8;
}
.hero-inner{
  position:relative;
  display:grid;
  grid-template-columns: 1.4fr .9fr;
  gap: 48px;
  align-items:center;
}
@media (max-width: 860px){
  .hero-inner{ grid-template-columns: 1fr; }
}
.hero h1{
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  max-width: 12ch;
}
.hero .lede{
  font-size: 1.14rem;
  color: var(--ink-soft);
  max-width: 46ch;
  margin-bottom: 1.6em;
}
.hero-tags{
  display:flex; flex-wrap:wrap; gap:.5em;
  margin-bottom: 2em;
}
.tag{
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing:.02em;
  padding: .35em .7em;
  border: 1px solid var(--line);
  border-radius: 100px;
  color: var(--mist);
  background: var(--paper-raised);
}
.cta-row{ display:flex; gap:14px; flex-wrap:wrap; }
.btn{
  font-family: var(--font-mono);
  font-size: .86rem;
  letter-spacing:.02em;
  text-decoration:none;
  padding: .82em 1.4em;
  border-radius: var(--radius);
  display:inline-flex; align-items:center; gap:.5em;
  transition: transform .15s ease, background .15s ease, color .15s ease;
}
.btn-primary{ background: var(--ink); color: var(--paper); }
.btn-primary:hover{ background: var(--teal); transform: translateY(-1px); }
.btn-ghost{ border:1px solid var(--line); color: var(--ink); background:transparent; }
.btn-ghost:hover{ border-color: var(--teal); color: var(--teal); }

/* hero signature card — schema-style ID card */
.id-card{
  background: var(--ink);
  color: var(--paper);
  border-radius: 10px;
  padding: 26px 26px 22px;
  position:relative;
  box-shadow: 0 22px 44px -20px rgba(22,34,58,.5);
}
.id-card::before{
  content:"";
  position:absolute; inset:8px;
  border: 1px solid rgba(238,241,239,.16);
  border-radius:6px;
  pointer-events:none;
}
.id-row{
  display:flex; justify-content:space-between; gap:12px;
  font-family: var(--font-mono);
  font-size: .78rem;
  padding: 9px 0;
  border-bottom: 1px dashed rgba(238,241,239,.18);
  color: rgba(238,241,239,.86);
}
.id-row:last-child{ border-bottom:none; }
.id-row span:first-child{ color: rgba(238,241,239,.5); }
.id-card h3{
  color: var(--paper);
  font-size: 1.1rem;
  margin-bottom: .1em;
}
.id-sub{
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--gold);
  margin-bottom: 1em;
  letter-spacing:.03em;
}

/* ---------- sections ---------- */
section{ padding: 84px 0; }
.section-head{ max-width: 640px; margin-bottom: 46px; }
.section-alt{ background: var(--paper-raised); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }

/* about */
.about-grid{
  display:grid; grid-template-columns: 1fr 1.3fr; gap: 56px;
}
@media (max-width: 860px){ .about-grid{ grid-template-columns:1fr; } }
.about-facts{
  font-family: var(--font-mono);
  font-size: .84rem;
}
.fact{ display:flex; justify-content:space-between; padding: 10px 0; border-top:1px solid var(--line); gap: 12px;}
.fact:last-child{ border-bottom: 1px solid var(--line); }
.fact span:first-child{ color: var(--mist); }
.fact span:last-child{ text-align:right; color: var(--ink); }

/* ---------- dual timeline (signature element) ---------- */
.timeline-wrap{ overflow-x:auto; padding-bottom: 6px; }
.timeline{
  position:relative;
  min-width: 640px;
  padding-top: 10px;
}
.timeline-track{
  position:relative;
  display:grid;
  grid-template-columns: 90px 1fr;
  gap: 18px;
  padding: 22px 0;
}
.timeline-track + .timeline-track{ border-top: 1px dashed var(--line); }
.track-label{
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing:.06em;
  text-transform:uppercase;
  color: var(--mist);
  padding-top: 6px;
}
.track-label.career{ color: var(--teal); }
.track-label.lang{ color: var(--rust); }
.track-line{
  position:relative;
  display:flex;
  align-items:center;
  min-height: 60px;
}
.track-line::before{
  content:"";
  position:absolute; left:0; right:0; top:50%;
  height:1px; background: var(--line);
}
.node{
  position:relative;
  flex: 1 1 0;
  display:flex; flex-direction:column; align-items:flex-start;
  min-width: 150px;
  padding-right: 18px;
}
.node .dot{
  width:11px; height:11px; border-radius:50%;
  background: var(--paper);
  border: 2.5px solid var(--teal);
  margin-bottom: 10px;
  z-index: 1;
}
.track-label.lang ~ .track-line .dot{ border-color: var(--rust); }
.node .when{
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--mist);
}
.node .what{ font-size: .92rem; color: var(--ink); font-weight:600; }
.node .where{ font-size: .8rem; color: var(--mist); }

/* skills as schema table */
.schema{
  width:100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: .86rem;
}
.schema th{
  text-align:left;
  font-size: .72rem;
  letter-spacing:.08em;
  text-transform:uppercase;
  color: var(--mist);
  border-bottom: 1px solid var(--ink);
  padding: 8px 14px;
}
.schema td{
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.schema tr:hover td{ background: var(--paper-raised); }
.level-bar{
  display:inline-block;
  width: 90px; height: 6px;
  background: var(--paper-dark);
  border-radius: 3px;
  overflow:hidden;
  vertical-align: middle;
  margin-right: 8px;
}
.level-bar > i{ display:block; height:100%; background: var(--teal); }
.skills-grid{ display:grid; gap: 40px; }

/* language cards */
.lang-grid{
  display:grid;
  grid-template-columns: repeat(auto-fit,minmax(180px,1fr));
  gap: 18px;
}
.lang-card{
  border:1px solid var(--line);
  background: var(--paper-raised);
  border-radius: var(--radius);
  padding: 18px 18px 16px;
}
.lang-card .lvl{
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--rust);
  letter-spacing:.03em;
}
.lang-card h4{ font-size: 1.02rem; margin: .2em 0 .5em; }

/* blog cards */
.post-grid{
  display:grid;
  grid-template-columns: repeat(auto-fit,minmax(280px,1fr));
  gap: 26px;
}
.post-card{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-raised);
  padding: 26px 24px;
  text-decoration:none;
  color:inherit;
  display:flex; flex-direction:column;
  transition: box-shadow .18s ease, transform .18s ease, border-color .18s ease;
}
.post-card:hover{
  box-shadow: 0 18px 34px -22px rgba(22,34,58,.4);
  transform: translateY(-3px);
  border-color: var(--teal);
}
.post-meta{
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--mist);
  margin-bottom: .8em;
}
.post-card h3{ font-size: 1.22rem; margin-bottom:.4em; }
.post-card p{ color: var(--ink-soft); font-size: .94rem; flex:1; }
.read-more{
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--teal);
  margin-top: 1em;
}

/* footer / contact */
.site-footer{
  border-top: 1px solid var(--line);
  padding: 56px 0 40px;
  background: var(--ink);
  color: rgba(238,241,239,.86);
}
.site-footer a{ color: var(--paper); text-decoration: underline; text-underline-offset:3px; }
.footer-grid{
  display:grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 32px;
}
@media (max-width:720px){ .footer-grid{ grid-template-columns:1fr; } }
.footer-grid h4{ color: var(--paper); font-size: .95rem; margin-bottom: .8em; }
.footer-grid ul{ list-style:none; margin:0; padding:0; font-size:.92rem; }
.footer-grid li{ margin-bottom: .5em; }
.foot-bottom{
  margin-top: 44px; padding-top: 22px;
  border-top: 1px solid rgba(238,241,239,.15);
  font-family: var(--font-mono);
  font-size: .74rem;
  color: rgba(238,241,239,.55);
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;
}

/* article / post page */
.post-hero{
  padding: 64px 0 40px;
  border-bottom: 1px solid var(--line);
}
.post-hero h1{ font-size: clamp(2rem,4.4vw,2.9rem); max-width: 22ch; }
article.post-body{
  max-width: 720px;
  margin: 0 auto;
  padding: 56px 28px 90px;
}
article.post-body h2{ margin-top: 1.6em; font-size: 1.5rem; }
article.post-body p{ font-size: 1.05rem; color: var(--ink-soft); }
article.post-body blockquote{
  margin: 1.8em 0;
  padding: 4px 0 4px 22px;
  border-left: 3px solid var(--teal);
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--ink);
}
.back-link{
  font-family: var(--font-mono);
  font-size: .82rem;
  color: var(--teal);
  text-decoration:none;
  display:inline-flex; align-items:center; gap:.4em;
}

/* utility */
.center{ text-align:center; }
.mt-lg{ margin-top: 48px; }