/* ================================================================
   mehmetaytugyuruk.github.io — style.css
   Fraunces display · system UI body · light theme
   ================================================================ */

/* ── Design Tokens ─────────────────────────────────────────────── */
:root {
  --paper:    #F7F6F2;
  --ink:      #18181B;
  --muted:    #71717A;
  --hairline: #E2E0D8;
  --accent:   #2E3A8C;
  --ease:     cubic-bezier(0.22, 0.9, 0.28, 1);
  --gutter:   max(5vw, calc(50% - 22rem));
  color-scheme: light;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scrollbar-gutter: stable;
  background: var(--paper);
}

body {
  margin: 0;
  min-height: 100vh; /* fallback */
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  overflow-x: hidden; /* fallback */
  overflow-x: clip;
  isolation: isolate;
  background: transparent;
  color: var(--ink);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans', sans-serif;
  font-size: 1rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Canvas background ─────────────────────────────────────────── */
.bg-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0;
  transition: opacity 1.6s ease;
}

.bg-canvas.visible { opacity: 1; }

/* ── Masthead (home) — centered column layout ───────────────────── */
.masthead {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: clamp(2rem, 5vh, 4rem) var(--gutter) 0;
  gap: 0;
}

/* ── Portrait photo ──────────────────────────────────────────────── */
.portrait-wrap {
  margin-bottom: 1.35rem;
}

.portrait {
  display: block;
  width: clamp(100px, 13vw, 136px);
  height: clamp(100px, 13vw, 136px);
  border-radius: 50%;
  object-fit: cover;
  object-position: center 18%;
  /* Double-ring: photo edge → paper gap → outer hairline ring */
  box-shadow:
    0 0 0 1.5px var(--hairline),
    0 0 0 5px var(--paper),
    0 0 0 6.5px var(--hairline);
  filter: grayscale(8%);
  transition: filter 0.4s ease, box-shadow 0.35s ease;
}

.portrait:hover {
  filter: grayscale(0%);
  box-shadow:
    0 0 0 1.5px var(--muted),
    0 0 0 5px var(--paper),
    0 0 0 6.5px var(--hairline);
}

/* ── Identity block ──────────────────────────────────────────────── */
.identity {
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ── Name ────────────────────────────────────────────────────────── */
.name {
  font-family: 'Fraunces', Georgia, 'Times New Roman', serif;
  font-size: clamp(1.55rem, 3vw, 2.4rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin: 0 0 0.35rem 0;
  color: var(--ink);
}

.role {
  font-size: 0.82rem;
  color: var(--muted);
  margin: 0 0 0.9rem 0;
  letter-spacing: 0.01em;
}

/* ── Social links ───────────────────────────────────────────────── */
.socials {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.1rem 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.socials a {
  font-size: 0.82rem;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.18s;
  display: inline-flex;
  align-items: center;
}

.socials a:hover { color: var(--ink); }

/* ── Main / Directory (home page) ────────────────────────────── */
main {
  position: relative;
  z-index: 2;
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: clamp(0.75rem, 2vh, 1.5rem) var(--gutter) clamp(0.5rem, 1.5vh, 1rem);
}

.directory {
  width: 100%;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.dir-list {
  list-style: none;
  padding: 0;
  margin: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.dir-list li {
  border-bottom: 1px solid var(--hairline);
  flex: 1;
  display: flex;
  align-items: center;
  max-height: 8rem;
}
.dir-list li:first-child { border-top: 1px solid var(--hairline); }

/* ── Directory entry ─────────────────────────────────────────────── */
.entry {
  display: flex;
  align-items: baseline;
  gap: 1.1rem;
  padding: 0.55rem 0;
  text-decoration: none;
  color: var(--ink);
  cursor: pointer;
}

/* Entry counter number */
.entry-n {
  font-size: 0.64rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-family: system-ui;
  min-width: 1.4rem;
  flex-shrink: 0;
  user-select: none;
  padding-top: 0.5em;
}

/* Large display word */
.word {
  font-family: 'Fraunces', Georgia, serif;
  font-size: clamp(1.9rem, 4.5vw, 4rem);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--ink);
  text-decoration: none;
  position: relative;
}

/* Underline slide animation on hover */
.word::after {
  content: '';
  position: absolute;
  bottom: 0.06em;
  left: 0;
  width: 0;
  height: 1px;
  background: currentColor;
  transition: width 0.4s var(--ease);
}

a.entry:hover .word::after { width: 100%; }

/* CV meta tag (right side) */
.meta-tag {
  font-size: 0.66rem;
  color: var(--muted);
  font-family: system-ui;
  margin-left: auto;
  align-self: center;
  user-select: none;
  opacity: 0.75;
}

/* File entry (CV) — outer span is not a link */
.entry--file {
  display: flex;
  align-items: baseline;
  gap: 1.1rem;
  padding: 0.55rem 0;
}

/* CV word is muted since file not yet available */
.word--cv {
  color: var(--muted);
  transition: color 0.2s;
}

.word--cv::after { display: none; }
.word--cv:hover { color: var(--ink); }


/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   SUB-PAGE STYLES
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */



/* ── Page main (sub-pages scrollable area) ───────────────────────── */
.page-main {
  position: relative;
  z-index: 2;
  flex: 1;
  display: block;
  align-items: initial;
  padding: clamp(2.5rem, 6vh, 5rem) var(--gutter) clamp(2rem, 4vh, 3rem);
  overflow-y: auto;
}

/* ── Page title ──────────────────────────────────────────────────── */
.page-title {
  font-family: 'Fraunces', Georgia, serif;
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--ink);
  margin: 0 0 clamp(2rem, 5vh, 3.5rem) 0;
}

/* ── Section label ───────────────────────────────────────────────── */
.section-label {
  font-size: 0.64rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin: 2.5rem 0 0.9rem 0;
}

.section-label:first-child { margin-top: 0; }

/* ── Item list (publications) ────────────────────────────────────── */
.items {
  list-style: none;
  padding: 0;
  margin: 0;
}

.item {
  display: flex;
  gap: 1.1rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--hairline);
}

.item:first-child { border-top: 1px solid var(--hairline); }

.item-n {
  font-size: 0.73rem;
  color: var(--muted);
  font-family: system-ui;
  font-weight: 600;
  flex-shrink: 0;
  min-width: 1.5rem;
  line-height: 1.6;
  padding-top: 0.06rem;
}

.item-body { flex: 1; min-width: 0; }

.item-title {
  font-size: 0.91rem;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  line-height: 1.6;
  display: block;
}

.item-title:hover { text-decoration: underline; }

.item-authors {
  font-size: 0.8rem;
  color: var(--muted);
  margin: 0.28rem 0 0 0;
  line-height: 1.5;
}

.item-venue {
  font-size: 0.78rem;
  color: var(--muted);
  font-style: italic;
  margin: 0.1rem 0 0 0;
}

.item-links {
  display: flex;
  gap: 0.45rem;
  margin-top: 0.75rem;
  flex-wrap: wrap;
}

/* Chip button (DOI, Code, Weights) */
.chip {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  text-decoration: none;
  border: 1px solid var(--accent);
  border-radius: 2px;
  padding: 0.18rem 0.55rem;
  transition: background 0.15s, color 0.15s;
  display: inline-block;
}

.chip:hover {
  background: var(--accent);
  color: var(--paper);
}

/* ── About page ─────────────────────────────────────────────────── */
.about-body { max-width: 38rem; }

.about-para {
  font-size: 0.93rem;
  line-height: 1.88;
  color: var(--ink);
  margin: 0 0 1rem 0;
}

.about-para strong {
  color: var(--ink);
  font-weight: 600;
}

.interests-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 1.5rem 0 2.25rem 0;
}

.interest-chip {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 3px;
  padding: 0.2rem 0.65rem;
  opacity: 0.82;
  display: inline-block;
}

.contact-block {
  border-top: 1px solid var(--hairline);
  padding-top: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.contact-line {
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  margin: 0;
}

.contact-label {
  font-size: 0.63rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  min-width: 5rem;
  flex-shrink: 0;
}

.contact-value {
  font-size: 0.84rem;
  color: var(--ink);
  text-decoration: none;
}

a.contact-value:hover { text-decoration: underline; color: var(--accent); }

/* ── Project items ───────────────────────────────────────────────── */
.project-item {
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--hairline);
}

.project-item:first-of-type { border-top: 1px solid var(--hairline); }

.project-header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.project-name {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
  display: inline-block;
  position: relative;
}

.project-name::after {
  content: '';
  position: absolute;
  bottom: 0.05em;
  left: 0;
  width: 0;
  height: 1px;
  background: currentColor;
  transition: width 0.35s var(--ease);
}

.project-name:hover::after { width: 100%; }

.project-tag {
  font-size: 0.63rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  font-family: system-ui;
}

.project-desc {
  font-size: 0.86rem;
  color: var(--muted);
  line-height: 1.68;
  margin: 0.45rem 0 0 0;
  max-width: 36rem;
}

.project-links {
  display: flex;
  gap: 0.45rem;
  margin-top: 0.8rem;
  flex-wrap: wrap;
}

/* ── Education items ─────────────────────────────────────────────── */
.edu-section { margin-bottom: 2.75rem; }
.edu-section:last-child { margin-bottom: 0; }

.edu-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.edu-item {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--hairline);
}

.edu-item:first-child { border-top: 1px solid var(--hairline); }

.edu-degree {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.5;
}

.edu-degree a {
  color: inherit;
  text-decoration: none;
}

.edu-degree a:hover { text-decoration: underline; color: var(--accent); }

.edu-place {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

.edu-period {
  font-size: 0.74rem;
  color: var(--muted);
  margin-top: 0.12rem;
  font-variant-numeric: tabular-nums;
}

/* ── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 640px) {
  :root { --gutter: max(1rem, 4vw); }

  .masthead { padding-top: 1.5rem; }

  main {
    padding-top: 0.5rem;
    padding-bottom: 0;
  }

  /* Remove desktop max-height cap — phone screens are small enough */
  .dir-list li { max-height: none; }

  .entry, .entry--file { width: 100%; padding: 0; }

  .name { font-size: 1.25rem; }
  .role { font-size: 0.74rem; }
  .socials a { font-size: 0.74rem; }
  .socials { gap: 0.05rem 0.8rem; }

  .word { font-size: clamp(1.75rem, 9.5vw, 2.8rem); }

  /* Sub-pages */
  .page-title { font-size: clamp(2rem, 11vw, 3rem); }

  .item { flex-direction: column; gap: 0.25rem; }
  .item-n { min-width: auto; }

  .contact-line { flex-direction: column; gap: 0.1rem; }
  .contact-label { min-width: auto; }
}

@media (max-width: 380px) {
  :root { --gutter: 0.85rem; }
}

/* ── Focus (keyboard accessibility) ──────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

/* ── Print ───────────────────────────────────────────────────────── */
@media print {
  .bg-canvas { display: none; }
  .masthead { padding-top: 1rem; }
}