/* Mustafa Kunt Portfolio — PCB / Terminal theme (dark default + light option) */
:root {
  /* Dark (default) — PCB substrate / terminal bench */
  --bg: #0a0f0d;
  --bg-alt: #0c1310;
  --surface: #0e1512;
  --surface-2: #111815;
  --text: #f3f7f4;
  --text-muted: #93a39a;
  --text-dim: #5d7068;
  --accent: #c98a4b;          /* copper trace */
  --accent-hover: #d99a5e;
  --accent-soft: rgba(201, 138, 75, 0.12);
  --signal: #4fd1c5;          /* phosphor teal — links / live */
  --signal-dim: #3f8f7d;
  --border: #1c2a23;
  --border-strong: #2a3a31;
  --shadow: 0 6px 24px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
  --header-bg: rgba(10, 15, 13, 0.82);
  --on-accent: #1a0f04;
  --radius: 12px;
  --max-width: 1100px;
  --header-h: 72px;
  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

[data-theme="light"] {
  /* Light — schematic on paper */
  --bg: #f7f9f7;
  --bg-alt: #eef2ef;
  --surface: #ffffff;
  --surface-2: #f3f6f3;
  --text: #14201b;
  --text-muted: #51615a;
  --text-dim: #8a988f;
  --accent: #b06a2c;
  --accent-hover: #925621;
  --accent-soft: rgba(176, 106, 44, 0.1);
  --signal: #1c8a78;
  --signal-dim: #2a9d89;
  --border: #d9e2dc;
  --border-strong: #c3d0c8;
  --shadow: 0 6px 24px rgba(20, 32, 27, 0.08);
  --shadow-lg: 0 16px 40px rgba(20, 32, 27, 0.14);
  --header-bg: rgba(247, 249, 247, 0.85);
  --on-accent: #ffffff;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s ease, color 0.3s ease;
}

img { max-width: 100%; height: auto; display: block; }

a {
  color: var(--signal);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover { color: var(--accent); }

.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

.section { padding: 5rem 0; position: relative; }
.section--alt { background: var(--bg-alt); }

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
  color: var(--text);
}

.section__subtitle {
  color: var(--text-muted);
  margin: 0 0 2.5rem;
  max-width: 36rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1rem;
}

.logo {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--text);
  letter-spacing: -0.02em;
}
.logo span { color: var(--accent); }

.nav { display: flex; align-items: center; gap: 1.5rem; }

.nav__list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 1.25rem;
}

.nav__link {
  color: var(--text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
  position: relative;
}
.nav__link:hover,
.nav__link.is-active { color: var(--accent); }

.nav__link.is-active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}

.header-actions { display: flex; align-items: center; gap: 0.75rem; }

.lang-toggle {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.lang-toggle button {
  border: none;
  background: transparent;
  padding: 0.4rem 0.65rem;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.lang-toggle button.active {
  background: var(--accent);
  color: var(--on-accent);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}
.menu-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Hero */
.hero {
  padding: 4.5rem 0 5rem;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(900px 400px at 80% -10%, var(--accent-soft), transparent 60%),
    var(--bg);
}

/* PCB trace decoration layer */
.hero__traces {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.5;
  z-index: 0;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--signal-dim);
  letter-spacing: 0.04em;
  margin: 0 0 0.9rem;
}
.hero__eyebrow::before { content: "// "; color: var(--text-dim); }
.hero__eyebrow::after {
  content: "";
  display: inline-block;
  width: 8px; height: 1.05em;
  background: var(--accent);
  vertical-align: -0.18em;
  margin-left: 6px;
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 6vw, 3.4rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.06;
  margin: 0 0 1rem;
}

.hero__lead {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 32rem;
  margin: 0 0 2rem;
}

.hero__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.35rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: var(--font-body);
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.15s;
}
.btn:hover { transform: translateY(-2px); }

.btn--primary { background: var(--accent); color: var(--on-accent); }
.btn--primary:hover { background: var(--accent-hover); color: var(--on-accent); }

.btn--outline {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}
.btn--outline:hover { border-color: var(--accent); color: var(--accent); }

.hero__photo {
  width: 220px; height: 220px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow), 0 0 0 6px var(--accent-soft);
}

/* About */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 2.5rem;
  align-items: start;
}
.about__text p { margin: 0 0 1.25rem; color: var(--text); }
.about__text p:last-child { margin-bottom: 0; }

.info-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  position: relative;
}
.info-card::before {
  content: "";
  position: absolute;
  top: 0; left: 1.5rem; right: 1.5rem;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  border-radius: 2px;
}
.info-card h3 {
  margin: 0 0 1rem;
  font-size: 0.95rem;
  font-family: var(--font-mono);
  color: var(--accent);
}
.info-list { list-style: none; margin: 0; padding: 0; }
.info-list li {
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9375rem;
}
.info-list li:last-child { border-bottom: none; }
.info-list strong {
  display: block;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  margin-bottom: 0.2rem;
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}
.card__media { overflow: hidden; background: var(--bg-alt); }
.card__media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.card:hover .card__media img { transform: scale(1.04); }
.card__body { padding: 1.5rem; }

.card__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--signal-dim);
  letter-spacing: 0.03em;
  margin-bottom: 0.75rem;
}
.card__tag::before { content: "// "; color: var(--text-dim); }

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
  font-family: var(--font-display);
  font-weight: 600;
}
.card p { margin: 0; color: var(--text-muted); font-size: 0.9375rem; }

.experience-grid { display: grid; grid-template-columns: 1fr; max-width: 720px; }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.project-card--featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
}
.project-card--featured .card__media img {
  aspect-ratio: auto;
  height: 100%;
  min-height: 240px;
}

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}
.skill-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  position: relative;
}
.skill-card h3 {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  font-family: var(--font-mono);
  color: var(--accent);
}
.skill-card h3::before { content: "▹ "; color: var(--signal-dim); }
.skill-card ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--text-muted);
  font-size: 0.9375rem;
}
.skill-card li { margin-bottom: 0.35rem; }

/* Highlights */
.highlights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}
.highlight-item {
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.highlight-item h3 {
  margin: 0 0 0.75rem;
  font-size: 1.1rem;
  font-family: var(--font-display);
  font-weight: 600;
}
.highlight-item p { margin: 0; color: var(--text-muted); font-size: 0.9375rem; }

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}
.contact-item {
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
.contact-item strong {
  display: block;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  margin-bottom: 0.35rem;
}
.contact-item a,
.contact-item span {
  font-weight: 500;
  color: var(--text);
  word-break: break-word;
}
.contact-item a:hover { color: var(--accent); }

/* Footer */
.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-dim);
  font-size: 0.875rem;
  font-family: var(--font-mono);
}
.site-footer p { margin: 0; }

/* Skill & highlight hover */
.skill-card,
.highlight-item,
.contact-item {
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.skill-card:hover,
.highlight-item:hover,
.contact-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: var(--accent);
}

/* Tech badges */
.tech-badges {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 1rem 0 0;
  padding: 0;
}
.tech-badges li {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--border-strong);
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  letter-spacing: -0.01em;
}

/* Scroll progress bar */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--signal));
  z-index: 200;
  transition: width 0.1s linear;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: 50%;
  top: -60px;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--on-accent);
  padding: 0.6rem 1.2rem;
  border-radius: 0 0 8px 8px;
  font-weight: 600;
  font-size: 0.875rem;
  z-index: 300;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 0; color: var(--on-accent); }

/* Theme toggle */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }
.theme-toggle__moon { display: none; }
[data-theme="light"] .theme-toggle__sun { display: none; }
[data-theme="light"] .theme-toggle__moon { display: block; }

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: 1.5rem; right: 1.5rem;
  width: 46px; height: 46px;
  border-radius: 10px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--on-accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.25s, transform 0.25s, visibility 0.25s, background 0.2s;
  z-index: 150;
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--accent-hover); }

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible { opacity: 1; transform: none; }

/* Focus */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
  .hero__eyebrow::after { animation: none; }
}

/* Responsive */
@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; text-align: center; }
  .hero__eyebrow { display: inline-block; }
  .hero__lead { margin-inline: auto; }
  .hero__actions { justify-content: center; }
  .hero__photo-wrap { order: -1; display: flex; justify-content: center; }
  .about__grid { grid-template-columns: 1fr; }
  .project-card--featured { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .menu-toggle { display: flex; }
  .nav__list {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.5rem 1.5rem;
    gap: 0;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s, opacity 0.25s;
    box-shadow: var(--shadow);
  }
  .nav__list.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav__list li { border-bottom: 1px solid var(--border); }
  .nav__link { display: block; padding: 0.85rem 0; }
}

/* ============================================================
   Contact icons + footer social
   ============================================================ */
.contact-item {
  display: flex;
  gap: 0.9rem;
  align-items: center;
}
.contact-item__icon {
  flex: none;
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--accent-soft);
  border: 1px solid var(--border-strong);
  color: var(--accent);
}
.contact-item__icon--brand { color: var(--signal); }
.contact-item__body { min-width: 0; }

.footer-social {
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  margin-bottom: 1.1rem;
}
.footer-social a {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: color 0.2s, border-color 0.2s, transform 0.15s, background 0.2s;
}
.footer-social a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-2px);
}

/* ============================================================
   Clickable project cards
   ============================================================ */
.project-card { position: relative; }
.card__link {
  position: absolute;
  inset: 0;
  z-index: 3;
  border-radius: var(--radius);
}
.card__link:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}
.card__more {
  display: inline-block;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: -0.01em;
  transition: transform 0.2s ease;
}
.project-card:hover .card__more { transform: translateX(5px); }

/* ============================================================
   Project detail pages
   ============================================================ */
.proj-hero {
  position: relative;
  overflow: hidden;
  padding: 3.25rem 0 2.5rem;
  background:
    radial-gradient(900px 400px at 80% -10%, var(--accent-soft), transparent 60%),
    var(--bg);
  border-bottom: 1px solid var(--border);
}
.proj-hero__traces {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.5;
  z-index: 0;
}
.proj-hero .container { position: relative; z-index: 1; }
.proj-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}
.proj-back:hover { color: var(--accent); }
.proj-hero__tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--signal-dim);
}
.proj-hero__tag::before { content: "// "; color: var(--text-dim); }
.proj-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin: 0.55rem 0 1rem;
  max-width: 20ch;
}
.proj-hero__lead {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 46ch;
  margin: 0 0 1.5rem;
}

.proj-main { padding: 3rem 0 4rem; }
.proj-article { max-width: 760px; margin-inline: auto; }
.proj-cover {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 2.5rem;
  box-shadow: var(--shadow);
}

.proj-block { margin-bottom: 2.5rem; }
.proj-block h2 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 0.9rem;
  position: relative;
  padding-left: 0.95rem;
}
.proj-block h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(var(--accent), var(--signal));
}
.proj-block p { margin: 0 0 1rem; color: var(--text); }
.proj-block p:last-child { margin-bottom: 0; }
.proj-block ul { margin: 0 0 1rem; padding-left: 1.2rem; color: var(--text); }
.proj-block li { margin-bottom: 0.5rem; }
.proj-block li::marker { color: var(--accent); }

.proj-callout {
  border: 1px solid var(--border-strong);
  border-left: 3px solid var(--accent);
  background: var(--surface);
  border-radius: 10px;
  padding: 1.1rem 1.25rem;
  margin: 0 0 2.5rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}
.proj-callout strong {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 0.4rem;
}

.proj-figure {
  margin: 0 0 2.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}
.proj-figure svg { width: 100%; height: auto; display: block; }
.proj-figure figcaption {
  margin-top: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.5;
}

.proj-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.4rem 0 0;
  padding: 0;
  list-style: none;
}
.proj-tech li {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--border-strong);
  padding: 0.3rem 0.7rem;
  border-radius: 6px;
}

.proj-next {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  border-top: 1px solid var(--border);
  padding-top: 1.75rem;
  margin-top: 0.5rem;
}
.proj-next a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

/* ============================================================
   Bilingual block toggle (detail pages)
   ============================================================ */
.lang { display: none; }
html[data-lang="tr"] div.lang--tr,
html[data-lang="en"] div.lang--en { display: block; }
html[data-lang="tr"] span.lang--tr,
html[data-lang="en"] span.lang--en { display: inline; }

/* ============================================================
   Inline SVG diagram theming
   ============================================================ */
.dgm text { font-family: var(--font-mono); }
.dgm-box { fill: var(--surface); stroke: var(--border-strong); stroke-width: 1.5; }
.dgm-box-accent { fill: var(--accent-soft); stroke: var(--accent); stroke-width: 1.5; }
.dgm-box-signal { fill: rgba(79, 209, 197, 0.1); stroke: var(--signal); stroke-width: 1.5; }
.dgm-label { fill: var(--text); font-size: 13px; font-weight: 600; }
.dgm-sub { fill: var(--text-muted); font-size: 10.5px; }
.dgm-accent { fill: var(--accent); }
.dgm-signal-fill { fill: var(--signal); }
.dgm-muted { fill: var(--text-muted); }
.dgm-trace { stroke: var(--accent); stroke-width: 2; fill: none; }
.dgm-trace-signal { stroke: var(--signal); stroke-width: 2; fill: none; }
.dgm-axis { stroke: var(--border-strong); stroke-width: 1; }
.dgm-grid { stroke: var(--border); stroke-width: 1; }
.dgm-node { fill: var(--accent); }
.dgm-node-signal { fill: var(--signal); }
.dgm-flow {
  stroke-dasharray: 6 7;
  animation: dgmflow 1.3s linear infinite;
}
@keyframes dgmflow { to { stroke-dashoffset: -26; } }

@media (max-width: 560px) {
  .proj-next { flex-direction: column; align-items: stretch; text-align: center; }
}