/* =========================================================
   Ali Vaziri — Site Styles
   - Accessible, responsive, dark-mode ready
   - Works across all pages you've shared (index/experience/projects/publications/certifications)
   ========================================================= */

/* ---------- CSS Variables (Theme) ---------- */
:root {
  --bg: #ffffff;
  --fg: #111827;
  --muted: #6b7280;
  --accent: #0b5fff;
  --accent-ink: #ffffff;
  --line: #e6e8eb;
  --card: #f7f8fb;
  --shadow: 0 8px 30px rgba(0,0,0,0.06);
  --radius: 14px;
  --w: 1040px;

  --font-sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --space-1: 6px;
  --space-2: 10px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 36px;
  --space-6: 56px;
  --focus: 2px solid #99c2ff;
}

:root[data-theme="dark"] {
  --bg: #0f1115;
  --fg: #e6e8ea;
  --muted: #9aa3b2;
  --accent: #6ea8fe;
  --accent-ink: #0b1220;
  --line: #232833;
  --card: #161a22;
  --shadow: none;
}

/* Respect system preference if no explicit theme chosen */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1115;
    --fg: #e6e8ea;
    --muted: #9aa3b2;
    --accent: #6ea8fe;
    --accent-ink: #0b1220;
    --line: #232833;
    --card: #161a22;
    --shadow: none;
  }
}

/* ---------- Reset-ish ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }
img, picture, video { max-width: 100%; display: block; }

body {
  font-family: var(--font-sans);
  color: var(--fg);
  background: radial-gradient(1200px 600px at 10% -10%, rgba(11,95,255,0.06), transparent 60%) no-repeat,
              var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.muted { color: var(--muted); }

/* Focus visibility */
:focus-visible {
  outline: var(--focus);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ---------- Layout ---------- */
.wrap {
  max-width: var(--w);
  padding-inline: var(--space-4);
  margin-inline: auto;
}

.section { padding: var(--space-6) 0; }
.section-title {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  margin: 0 0 var(--space-3);
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(1.2) blur(6px);
  background: color-mix(in oklab, var(--bg) 86%, transparent);
  border-bottom: 1px solid var(--line);
}

.mast {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: var(--space-3);
  min-height: 64px;
}

.brand {
  font-weight: 800;
  letter-spacing: 0.2px;
  font-size: 1.15rem;
  color: var(--fg);
}

.site-nav {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: var(--space-2);
}

.site-nav a,
.site-nav .chip {
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.95rem;
  line-height: 1;
  border: 1px solid transparent;
}

.site-nav a:hover { background: color-mix(in oklab, var(--accent) 12%, var(--bg)); text-decoration: none; }
.site-nav a.active { border-color: var(--accent); }

.menu-btn {
  display: none;
  background: none;
  border: none;
  padding: 8px;
  margin-left: auto;
  border-radius: 10px;
}
.menu-btn:focus-visible { outline: var(--focus); }
.menu-bar {
  width: 22px; height: 2px; background: var(--fg); display: block; margin: 4px 0;
}
.menu-text { position: absolute; left: -9999px; }

/* Mobile nav */
@media (max-width: 820px) {
  .menu-btn { display: inline-block; }
  .site-nav {
    position: absolute;
    top: 64px; right: 0; left: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: var(--space-3) var(--space-4);
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }
  .site-nav.open { display: flex; }
}

/* ---------- Hero ---------- */
.hero {
  padding: calc(var(--space-6) + 10px) 0 var(--space-6);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: clamp(var(--space-4), 4vw, var(--space-6));
  align-items: center;
}
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
}

.title {
  font-size: clamp(1.5rem, 3.2vw, 2.25rem);
  line-height: 1.2;
  margin: 0 0 var(--space-3);
}

.lede {
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: var(--space-4);
}

.hero-media { text-align: center; }
.avatar {
  width: clamp(180px, 40vw, 260px);
  height: auto;
  border-radius: 24px;
  box-shadow: var(--shadow);
  margin: 0 auto var(--space-2);
}

/* ---------- Components ---------- */
.btn {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-ink);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 10px 16px;
  font-weight: 600;
  transition: transform 0.05s ease-in-out;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }

.btn.ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.chip {
  display: inline-block;
  background: color-mix(in oklab, var(--accent) 13%, var(--bg));
  color: var(--fg);
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 0.95rem;
  border: 1px solid color-mix(in oklab, var(--accent) 35%, var(--line));
}
.chip:hover { text-decoration: none; }

.badge {
  display: inline-block;
  font-size: 0.8rem;
  padding: 4px 8px;
  border-radius: 999px;
  background: color-mix(in oklab, var(--accent) 18%, var(--bg));
  border: 1px solid color-mix(in oklab, var(--accent) 35%, var(--line));
  color: var(--fg);
}

/* CTA / lists */
.cta { display: flex; gap: var(--space-2); flex-wrap: wrap; margin-bottom: var(--space-3); }
.meta-list { list-style: none; padding: 0; margin: 0 0 var(--space-3); color: var(--muted); }
.meta-list li { margin: 2px 0; }

/* Cards & grids */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}
@media (max-width: 980px) { .cards { grid-template-columns: 1fr 1fr; } }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: var(--space-4);
}
.card-title {
  margin: 0 0 var(--space-2);
  font-size: 1.05rem;
}

/* ---------- Item lists (Experience/Projects/Certs) ---------- */
.item-list { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-3); }
.item-list li {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-3);
}
.item-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
}
.item-header h3 { margin: 0; font-size: 1.05rem; }
.item-header span { color: var(--muted); font-size: 0.95rem; }

/* === Publications: media LEFT, text RIGHT (always) === */
.pub.row{
  display: grid;
  grid-template-columns: var(--media-w, 280px) 1fr; /* left fixed, right fluid */
  gap: 16px;
  align-items: start;
}

/* Make sure grid order is left->right regardless of HTML quirks */
.pub-media{ grid-column: 1; }
.pub-body { grid-column: 2; }

/* Stack all figures vertically in the LEFT column */
.pub-media{
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-content: flex-start;
}

/* Uniform boxes per paper; scale images to fit (no crop) */
.pub{ --thumb-h: 180px; } /* tweak per paper via inline style on <li class="pub row"> */
.pub .thumb{
  width: 100%;
  height: var(--thumb-h);
  object-fit: contain;                  /* <-- scales, never crops */
  aspect-ratio: auto !important;        /* neutralize any earlier aspect-ratio rules */
  background: color-mix(in oklab, var(--fg) 4%, var(--bg)); /* subtle letterbox */
  border-radius: 10px;
  border: 1px solid var(--line);
}

/* Optional: keep two columns down to smaller widths.
   If you WANT stacking on very small screens, keep this.
   If you want figures left even on phones, DELETE this block. */
@media (max-width: 600px){
  .pub.row{ grid-template-columns: 1fr; }   /* stacks on small screens */
  .pub-media, .pub-body{ grid-column: auto; }
}

/* Optional: a bit wider media on big screens */
@media (min-width: 1200px){
  .pub.row{ --media-w: 320px; }
}

/* ---------- Tables (optional) ---------- */
table { width: 100%; border-collapse: collapse; }
td, th { padding: 10px; border-bottom: 1px solid var(--line); text-align: left; }

/* ---------- Footer ---------- */
.site-footer {
  padding: var(--space-4) 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  margin-top: var(--space-6);
  text-align: center;
}

/* ---------- Skip Link ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px; height: 1px; overflow: hidden;
}
.skip-link:focus {
  left: 10px; top: 10px; width: auto; height: auto;
  background: var(--accent); color: var(--accent-ink);
  padding: 8px 12px; border-radius: 8px; z-index: 1000;
}

/* ---------- Utilities ---------- */
hr { border: none; border-top: 1px solid var(--line); margin: var(--space-4) 0; }
code, pre { font-family: var(--font-mono); background: color-mix(in oklab, var(--fg) 6%, var(--bg)); border-radius: 8px; }
pre { padding: var(--space-3); overflow: auto; }

/* ---------- Print ---------- */
@media print {
  .site-header, .site-footer, .menu-btn, #themeToggle { display: none !important; }
  .wrap { max-width: 100%; padding: 0; }
  a::after { content: " (" attr(href) ")"; font-size: 0.9em; color: var(--muted); }
}