/* ===========================================================
   Deniz Bickici personal site
   Single shared stylesheet for homepage + project pages
   =========================================================== */

:root {
  --bg:        #ffffff;
  --bg-soft:   #f7f9fc;
  --text:      #111317;
  --text-soft: #5c6470;
  --border:    #e7ebf2;
  --accent:    #0064e0;
  --accent-dk: #0050bd;
  --accent-sf: #eaf2ff;
  --maxw:      820px;
  --radius:    12px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               Helvetica, Arial, "Inter", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color .15s ease;
}
a:hover { color: var(--accent-dk); text-decoration: underline; }

/* ---------- Hero ---------- */
.hero {
  display: flex;
  gap: 36px;
  align-items: center;
  padding: 60px 0 36px;
}
.hero .photo {
  flex: 0 0 168px;
  width: 168px;
  height: 168px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border);
  background: var(--bg-soft);
}
.hero .photo-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 56px;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-sf);
}
.hero h1 {
  margin: 0 0 6px;
  font-size: 2.1rem;
  letter-spacing: -.02em;
}
.hero .tagline {
  margin: 0 0 4px;
  font-size: 1.12rem;
  color: var(--text);
  font-weight: 500;
}
.hero .affil {
  margin: 0;
  color: var(--text-soft);
  font-size: .98rem;
}
.hero .affil a { font-weight: 500; }

/* ---------- Social row ---------- */
.social {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}
.social a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 13px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text-soft);
  font-size: 14px;
  font-weight: 500;
}
.social a:hover {
  color: var(--accent);
  border-color: var(--accent);
  text-decoration: none;
}
.social svg { width: 16px; height: 16px; fill: currentColor; }

/* ---------- Sections ---------- */
section { padding: 26px 0; }
section + section { border-top: 1px solid var(--border); }
h2 {
  font-size: 1.0rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-soft);
  margin: 0 0 18px;
  font-weight: 700;
}
p { margin: 0 0 14px; }
.lead { color: var(--text); }

/* ---------- Interests chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 5px 12px;
  background: var(--accent-sf);
  color: var(--accent-dk);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
}

/* ---------- Publications ---------- */
.pub {
  display: flex;
  gap: 18px;
  padding: 16px 0;
}
.pub + .pub { border-top: 1px solid var(--border); }
.pub .thumb {
  flex: 0 0 168px;
  width: 168px;
  border-radius: 8px;
  border: 1px solid var(--border);
  overflow: hidden;
  align-self: flex-start;
  background: var(--bg-soft);
}
.pub .thumb img { width: 100%; display: block; }
.pub .body { flex: 1; min-width: 0; }
.pub .venue {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--accent-dk);
  background: var(--accent-sf);
  padding: 2px 9px;
  border-radius: 6px;
  margin-bottom: 8px;
}
.pub h3 {
  margin: 0 0 5px;
  font-size: 1.08rem;
  line-height: 1.35;
  letter-spacing: -.01em;
}
.pub h3 a { color: var(--text); }
.pub h3 a:hover { color: var(--accent); }
.pub .authors { margin: 0 0 4px; font-size: .95rem; color: var(--text-soft); }
.pub .authors .me { color: var(--text); font-weight: 600; }
.pub .pub-links { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 8px; }
.pub .pub-links a {
  font-size: 13px;
  font-weight: 600;
  padding: 3px 11px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-soft);
}
.pub .pub-links a:hover { color: var(--accent); border-color: var(--accent); text-decoration: none; }

/* ---------- Timeline (education) ---------- */
.timeline { display: flex; flex-direction: column; gap: 18px; }
.tl {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 18px;
}
.tl .when { color: var(--text-soft); font-size: .9rem; padding-top: 2px; }
.tl .what h3 { margin: 0 0 2px; font-size: 1.02rem; }
.tl .what .org { color: var(--text-soft); font-size: .95rem; margin: 0 0 4px; }
.tl .what p { margin: 0; font-size: .95rem; color: var(--text-soft); }

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 48px;
  color: var(--text-soft);
  font-size: 14px;
  text-align: center;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  body { font-size: 16px; }
  .hero { flex-direction: column; text-align: center; padding-top: 40px; gap: 22px; }
  .social { justify-content: center; }
  .nav .links { gap: 16px; }
  .nav .links a.hide-sm { display: none; }
  .pub { flex-direction: column; }
  .pub .thumb { width: 100%; flex-basis: auto; }
  .tl { grid-template-columns: 1fr; gap: 4px; }
}