/* ═══════════════════════════════════════════════════
   Yurii Vitiuk — Portfolio
   Minimal, monochrome, typographically driven
   ═══════════════════════════════════════════════════ */

@font-face {
  font-family: 'Cinzel';
  src: url('fonts/Cinzel-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Cinzel';
  src: url('fonts/Cinzel-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Cinzel';
  src: url('fonts/Cinzel-Black.ttf') format('truetype');
  font-weight: 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --ink: #0a0a0a;
  --paper: #fafafa;
  --muted: #666;
  --border: #e0e0e0;
  --accent: #1a1a1a;
  --radius: 2px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;
  --font-display: 'Cinzel', 'Georgia', serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--ink); color: var(--paper); }

a { color: inherit; text-decoration: none; }

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

/* ── Layout ────────────────────────────────────── */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container--narrow {
  max-width: 800px;
}

/* ── Header ────────────────────────────────────── */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 250, 250, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.header__name {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.header__nav { display: flex; gap: var(--space-md); }

.header__nav a {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.2s;
}

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

/* ── Hero ──────────────────────────────────────── */

.hero {
  padding: calc(var(--space-xl) + 64px) 0 var(--space-xl);
  min-height: 80vh;
  display: flex;
  align-items: center;
}

.hero__label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--space-sm);
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

.hero__subtitle {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 560px;
  line-height: 1.7;
}

/* ── Section ───────────────────────────────────── */

.section {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--border);
}

.section__label {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--space-lg);
}

/* ── Projects Grid ─────────────────────────────── */

.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.project-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--border);
  transition: opacity 0.3s;
}

.project-card:hover { opacity: 0.85; }

.project-card:nth-child(even) { direction: rtl; }
.project-card:nth-child(even) > * { direction: ltr; }

.project-card__visual {
  aspect-ratio: 16/10;
  background: var(--ink);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
}

.project-card__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-card__info { padding: var(--space-md) 0; }

.project-card__number {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  margin-bottom: var(--space-xs);
}

.project-card__title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  line-height: 1.2;
}

.project-card__desc {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: var(--space-sm);
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag {
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.3em 0.8em;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--muted);
}

.project-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  margin-top: var(--space-sm);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  border-bottom: 1px solid var(--ink);
  padding-bottom: 2px;
  transition: opacity 0.2s;
}

.project-card__link:hover { opacity: 0.6; }

/* ── About ─────────────────────────────────────── */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.about__text {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--muted);
}

.about__text p + p { margin-top: var(--space-sm); }

.about__details { font-size: 0.85rem; }

.about__details dt {
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: var(--space-sm);
}

.about__details dd {
  font-size: 0.95rem;
  margin-top: 0.2rem;
}

/* ── Contact ───────────────────────────────────── */

.contact__email {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 700;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 4px;
  transition: opacity 0.2s;
}

.contact__email:hover { opacity: 0.6; }

.contact__links {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.contact__links a {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.2s;
}

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

/* ── Footer ────────────────────────────────────── */

.footer {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer p {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ═══════════════════════════════════════════════════
   Case Study Pages
   ═══════════════════════════════════════════════════ */

.cs-hero {
  padding: calc(var(--space-xl) + 64px) 0 var(--space-lg);
}

.cs-hero__back {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  margin-bottom: var(--space-lg);
  transition: color 0.2s;
}

.cs-hero__back:hover { color: var(--ink); }

.cs-hero__label {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--space-sm);
}

.cs-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: var(--space-sm);
}

.cs-hero__subtitle {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 600px;
  line-height: 1.7;
}

.cs-hero__meta {
  display: flex;
  gap: var(--space-lg);
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border);
}

.cs-hero__meta dt {
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
}

.cs-hero__meta dd {
  font-size: 0.9rem;
  margin-top: 0.2rem;
}

.cs-hero__figma {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  margin-top: var(--space-md);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 0.5em 1em;
  border-radius: var(--radius);
  transition: color 0.2s, border-color 0.2s;
}

.cs-hero__figma:hover {
  color: var(--ink);
  border-color: var(--ink);
}

.cs-hero__image {
  margin-top: var(--space-md);
  border-radius: var(--radius);
  overflow: hidden;
}

.cs-hero__image img {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
}

.cs-hero--dark .cs-hero__figma {
  border-color: #333;
  color: #888;
}

.cs-hero--dark .cs-hero__figma:hover {
  color: #fafafa;
  border-color: #fafafa;
}

/* Case study sections */

.cs-section {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--border);
}

.cs-section__title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.cs-body {
  font-size: 1rem;
  line-height: 1.8;
  color: #333;
}

.cs-body h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin: var(--space-md) 0 var(--space-xs);
}

.cs-body p + p { margin-top: var(--space-sm); }

.cs-body ul, .cs-body ol {
  margin: var(--space-sm) 0;
  padding-left: 1.5em;
}

.cs-body li { margin-bottom: 0.3em; }

.cs-body strong { font-weight: 600; }

/* Case study images */

.cs-image {
  margin: var(--space-md) 0;
  border-radius: var(--radius);
  overflow: hidden;
}

.cs-image img {
  width: 100%;
  border: 1px solid var(--border);
}

.cs-image--dark img { border: none; }

.cs-image__caption {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: var(--space-xs);
  letter-spacing: 0.05em;
}

/* Gallery grid */

.cs-gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  margin: var(--space-md) 0;
}

.cs-gallery .cs-image { margin: 0; }

/* Stats row */

.cs-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-md);
  margin: var(--space-md) 0;
}

.cs-stats__item dt {
  font-size: 2rem;
  font-family: var(--font-display);
  font-weight: 900;
}

.cs-stats__item dd {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 0.2rem;
}

/* Prev/Next navigation */

.cs-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--border);
}

.cs-nav a {
  padding: var(--space-lg) var(--space-md);
  transition: background 0.2s;
}

.cs-nav a:hover { background: rgba(0,0,0,0.02); }

.cs-nav__label {
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.3em;
}

.cs-nav__title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
}

.cs-nav a:last-child { text-align: right; border-left: 1px solid var(--border); }

/* ── Responsive ────────────────────────────────── */

@media (max-width: 768px) {
  .project-card { grid-template-columns: 1fr; }
  .project-card:nth-child(even) { direction: ltr; }
  .about-grid { grid-template-columns: 1fr; }
  .cs-hero__meta { flex-direction: column; gap: var(--space-sm); }
  .cs-gallery { grid-template-columns: 1fr; }
  .cs-nav { grid-template-columns: 1fr; }
  .cs-nav a:last-child { border-left: none; border-top: 1px solid var(--border); text-align: left; }
}