/* ============================================================
   Semih Onay — personal site
   Design 01 — Swiss / International Typographic Style, brutalist editorial.
   Pure black / white, one restrained accent. Zero dependencies.
   ============================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --black: #000000;
  --white: #ffffff;
  --black-60: rgba(0, 0, 0, 0.6);
  --black-08: rgba(0, 0, 0, 0.08);
  --accent: #e4002b;
  --font-display: -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, "Courier New", monospace;
  --rule-major: 2px;
  --rule-minor: 1px;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--white);
  color: var(--black);
  font-family: var(--font-display);
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
main { flex: 1 1 auto; }

ol, ul { list-style: none; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { font-family: inherit; font-weight: inherit; }
button, input, textarea { font: inherit; color: inherit; }

[id] { scroll-margin-top: 6rem; }

.accent { color: var(--accent); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: 0.001ms !important; animation-duration: 0.001ms !important; }
}

.wrap {
  max-width: 1400px;
  margin: 0 auto;
  padding-left: clamp(1.25rem, 4vw, 3rem);
  padding-right: clamp(1.25rem, 4vw, 3rem);
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--white);
  border-bottom: var(--rule-major) solid var(--black);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 0;
}

.brand-badge {
  display: inline-block;
  border: var(--rule-minor) solid var(--black);
  padding: 0.35rem 0.75rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
}

.site-nav a {
  display: inline-block;
  padding: 0.4rem 0.9rem;
  border-left: var(--rule-minor) solid var(--black);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color 0.15s ease;
}

.site-nav a:first-child { border-left: none; }

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--accent);
}

.nav-current { position: relative; }

.nav-current::after {
  content: "";
  position: absolute;
  left: 0.9rem;
  right: 0.9rem;
  bottom: 0.2rem;
  height: 2px;
  background: var(--accent);
}

/* ---------- Hero (home page) ---------- */

.hero {
  padding-top: clamp(2.5rem, 6vw, 5rem);
  padding-bottom: clamp(2.5rem, 5vw, 4rem);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: clamp(1.5rem, 4vw, 2.25rem);
}

.dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  background: var(--accent);
  vertical-align: middle;
  margin: 0 0.45em 0 0.05em;
}

.hero-name {
  text-transform: uppercase;
  font-weight: 800;
  line-height: 0.86;
  letter-spacing: -0.03em;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.hero-name .line {
  display: block;
  font-size: clamp(3.4rem, 13vw, 10rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  border-top: var(--rule-major) solid var(--black);
  padding-top: clamp(1.75rem, 4vw, 2.75rem);
}

.lead-text {
  font-size: clamp(1rem, 1.6vw, 1.25rem);
  line-height: 1.55;
  max-width: 40ch;
  margin-bottom: 2rem;
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  border: var(--rule-major) solid var(--black);
  padding: 0.95rem 1.6rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--white);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.cta:hover, .cta:focus-visible {
  background: var(--black);
  color: var(--white);
}

.cta-arrow { transition: transform 0.15s ease; }
.cta:hover .cta-arrow { transform: translateX(4px); }

.cta-row { display: flex; flex-wrap: wrap; gap: 1rem; }

.cta-full { width: 100%; justify-content: center; }

.hero-meta {
  border-left: var(--rule-minor) solid var(--black);
  padding-left: clamp(1.5rem, 3vw, 2.5rem);
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  padding: 0.85rem 0;
  border-bottom: var(--rule-minor) solid var(--black);
}

.meta-row:first-child { padding-top: 0; }
.meta-row:last-child { border-bottom: none; }

.meta-row dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--black-60);
}

.meta-row dd {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  text-align: right;
}

/* ---------- Page hero (inner pages: About / Projects / Blog / Contact) ---------- */

.page-hero {
  padding-top: clamp(2.5rem, 6vw, 4.5rem);
  padding-bottom: clamp(1.75rem, 4vw, 2.75rem);
  border-bottom: var(--rule-major) solid var(--black);
}

.page-title {
  text-transform: uppercase;
  font-weight: 800;
  line-height: 0.9;
  letter-spacing: -0.02em;
  font-size: clamp(2.5rem, 8vw, 5rem);
}

.page-subtitle {
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  color: var(--black-60);
  margin-top: 0.75rem;
  max-width: 48ch;
}

.page-body { padding-top: clamp(2.5rem, 5vw, 4rem); padding-bottom: clamp(3rem, 6vw, 5rem); }
.page-narrow { max-width: 860px; }

/* ---------- Work / Selected Work list ---------- */

.work { padding-bottom: clamp(3rem, 6vw, 5rem); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  border-top: var(--rule-major) solid var(--black);
  margin-top: clamp(2rem, 5vw, 4rem);
  padding: 2rem 0 1.5rem;
}

.section-head.no-border-top { border-top: none; margin-top: 0; }

.section-head h2 {
  font-size: clamp(1.75rem, 3.4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

.section-count {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--black-60);
}

.work-list {
  border-top: var(--rule-minor) solid var(--black);
  counter-reset: work;
}

.work-row {
  counter-increment: work;
  display: grid;
  grid-template-columns: 64px 1fr 1.4fr 40px;
  grid-template-areas:
    "num title desc arrow"
    "num title link arrow";
  align-items: center;
  column-gap: 1.5rem;
  row-gap: 0.4rem;
  padding: clamp(1.5rem, 3vw, 2.25rem) 0;
  border-bottom: var(--rule-minor) solid var(--black);
  transition: opacity 0.15s ease;
}

.work-row[hidden] { display: none; }

.row-num {
  grid-area: num;
  width: 3rem;
  height: 3rem;
  border: var(--rule-minor) solid var(--black);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
}

.row-num::before { content: counter(work, decimal-leading-zero); }

.row-title { grid-area: title; }

.row-title h3 {
  font-size: clamp(1.15rem, 1.8vw, 1.5rem);
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.row-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--black-60);
}

.row-desc {
  grid-area: desc;
  font-size: 0.95rem;
  line-height: 1.55;
  max-width: 52ch;
}

.row-link { grid-area: link; margin-top: 0; display: block; }
.row-link a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--black);
}
.row-link a:hover { color: var(--accent); border-color: var(--accent); }

.row-arrow {
  grid-area: arrow;
  justify-self: end;
  font-size: 1.2rem;
  transition: transform 0.15s ease, color 0.15s ease;
}

.work-row:hover .row-title h3 {
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.work-row:hover .row-arrow {
  transform: translateX(6px);
  color: var(--accent);
}

/* ---------- Filter tabs (Projects page) ---------- */

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border: var(--rule-minor) solid var(--black);
  width: fit-content;
  margin-top: clamp(1.5rem, 3vw, 2rem);
}

.filter-btn {
  border: none;
  border-right: var(--rule-minor) solid var(--black);
  background: var(--white);
  padding: 0.7rem 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}
.filter-btn:last-child { border-right: none; }
.filter-btn:hover { color: var(--accent); }
.filter-btn.is-active { background: var(--black); color: var(--white); }
.filter-btn.is-active:hover { color: var(--white); }

/* ---------- Tags (bordered boxes, brutalist — no pills) ---------- */

.tag {
  display: inline-block;
  border: var(--rule-minor) solid var(--black);
  padding: 0.3rem 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.tag-accent { border-color: var(--accent); color: var(--accent); }

/* ---------- Bio / About ---------- */

.bio {
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  line-height: 1.65;
  max-width: 62ch;
  border-top: var(--rule-major) solid var(--black);
  padding-top: clamp(1.75rem, 4vw, 2.5rem);
}
.bio p + p { margin-top: 1.1rem; }
.bio strong { font-weight: 800; }

.skills-section { margin-top: clamp(2.5rem, 5vw, 4rem); }
.skills-section > h2 {
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  font-weight: 800;
  text-transform: uppercase;
  border-top: var(--rule-major) solid var(--black);
  padding-top: 1.5rem;
  margin-bottom: 2rem;
}
.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem 3rem;
}
@media (max-width: 640px) { .skills-grid { grid-template-columns: 1fr; } }
.skill-category-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--black-60);
  border-bottom: var(--rule-minor) solid var(--black);
  padding-bottom: 0.6rem;
  margin-bottom: 0.85rem;
}
.skill-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.callsign-plate {
  margin-top: clamp(2.5rem, 5vw, 4rem);
  background: var(--black);
  color: var(--white);
  padding: clamp(1.5rem, 3vw, 2rem);
  display: flex;
  align-items: center;
  gap: 1rem;
}
.callsign-plate .dot-live {
  width: 8px; height: 8px; background: var(--accent); flex-shrink: 0;
}
.callsign-plate .callsign {
  font-family: var(--font-mono);
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  font-weight: 700;
  letter-spacing: 0.08em;
}
.callsign-plate .caption {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.65);
  margin-top: 0.2rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ---------- Contact ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: clamp(2.5rem, 5vw, 4rem);
  border-top: var(--rule-major) solid var(--black);
  padding-top: clamp(1.75rem, 4vw, 2.5rem);
}
@media (max-width: 760px) { .contact-grid { grid-template-columns: 1fr; } }

.contact-info h3 {
  font-size: clamp(1.15rem, 1.8vw, 1.4rem);
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 0.85rem;
}
.contact-info > p { font-size: 0.95rem; line-height: 1.6; color: var(--black-60); }

.contact-links { margin-top: 1.75rem; display: flex; flex-direction: column; gap: 0; border-top: var(--rule-minor) solid var(--black); }
.contact-links a {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.9rem 0;
  border-bottom: var(--rule-minor) solid var(--black);
  font-size: 0.85rem; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase;
  transition: color 0.15s ease;
}
.contact-links a:hover { color: var(--accent); }

/* ---------- Blog placeholder ---------- */

.blog-empty {
  border-top: var(--rule-major) solid var(--black);
  padding-top: clamp(2rem, 4vw, 3rem);
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: var(--black-60);
  max-width: 48ch;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: var(--rule-major) solid var(--black);
}

.footer-columns {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: clamp(2rem, 4vw, 3rem);
  padding: clamp(2rem, 4vw, 3rem) 0 clamp(1.5rem, 3vw, 2rem);
}
@media (max-width: 760px) { .footer-columns { grid-template-columns: 1fr; gap: 2rem; } }

.footer-columns > div:not(:first-child) { border-left: var(--rule-minor) solid var(--black); padding-left: 2rem; }
@media (max-width: 760px) { .footer-columns > div:not(:first-child) { border-left: none; border-top: var(--rule-minor) solid var(--black); padding-left: 0; padding-top: 1.5rem; } }

.footer-columns h3 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--black-60);
  margin-bottom: 1rem;
}

.footer-brand-name { font-size: 1.25rem; font-weight: 800; text-transform: uppercase; }
.footer-columns p { font-size: 0.85rem; line-height: 1.55; color: var(--black-60); max-width: 32ch; margin-top: 0.75rem; }

.footer-nav-links { display: flex; flex-direction: column; gap: 0.6rem; }
.footer-nav-links a { font-size: 0.85rem; font-weight: 600; transition: color 0.15s ease; }
.footer-nav-links a:hover { color: var(--accent); }

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.75rem 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-top: var(--rule-minor) solid var(--black);
}

.footer-links { display: flex; gap: 1.25rem; }

.footer-links a {
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ---------- Responsive ---------- */

@media (max-width: 760px) {
  .hero-grid { grid-template-columns: 1fr; }

  .hero-meta {
    border-left: none;
    border-top: var(--rule-minor) solid var(--black);
    padding-left: 0;
    padding-top: 1.5rem;
  }

  .work-row {
    grid-template-columns: 56px 1fr;
    grid-template-areas:
      "num title"
      "desc desc"
      "link link";
    row-gap: 0.75rem;
    column-gap: 1rem;
  }

  .row-arrow { display: none; }

  .row-num { width: 2.6rem; height: 2.6rem; font-size: 0.9rem; }
}