/* Design system — Iuliia Bielugina portfolio */

:root {
  --bg: #111110;
  --surface: #1a1a18;
  --border: #2a2a27;
  --text-primary: #f0ede8;
  --text-secondary: #92908a;
  --accent: #c4a882;
  --accent-hover: #d4b892;
  --available: #4a9e6a;
  --max-width: 720px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --space-12: 96px;
  --radius-card: 12px;
  --radius-sm: 8px;
  --font: "Inter", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  opacity: 0.75;
}

/* Typography */
h1,
h2,
h3,
h4 {
  font-weight: 500;
  margin: 0;
}

.section-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: var(--space-1);
}

.section-heading {
  font-size: 28px;
  font-weight: 500;
  line-height: 1.25;
  color: var(--text-primary);
  margin: 0 0 var(--space-4);
}

/* Layout */
.wrap {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-3);
  padding-right: var(--space-3);
}

/* Site header / nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-2) var(--space-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  flex-wrap: nowrap;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
}

.nav-back {
  color: var(--text-secondary);
  font-size: 14px;
  white-space: nowrap;
}

.nav-back:hover {
  color: var(--text-primary);
  opacity: 0.75;
}

.logo {
  font-weight: 500;
  color: var(--accent);
  font-size: 18px;
  letter-spacing: 0.02em;
}

.logo:hover {
  opacity: 0.75;
}

.nav-toggle {
  display: none;
  margin-left: auto;
  padding: var(--space-1) var(--space-2);
  font-family: inherit;
  font-size: 14px;
  color: var(--text-primary);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.nav-toggle:hover {
  opacity: 0.75;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-left: auto;
}

.site-nav a {
  color: var(--text-primary);
  font-size: 15px;
}

.site-nav a:hover {
  opacity: 0.75;
}

/* Hero */
.hero {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
}

.hero-label-dot {
  color: var(--available);
  font-size: 10px;
  line-height: 1;
}

.hero-name {
  font-size: 48px;
  font-weight: 500;
  line-height: 1.15;
  margin-bottom: var(--space-2);
}

.hero-title {
  font-size: 18px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
}

.hero-bio {
  color: var(--text-primary);
  max-width: 52ch;
  margin-bottom: var(--space-6);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.btn:hover {
  opacity: 0.75;
}

.btn-primary {
  background-color: var(--accent);
  color: #111110;
  border-color: var(--accent);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border);
}

.btn-secondary:hover {
  border-color: var(--text-secondary);
}

/* Sections */
.section {
  padding-bottom: var(--space-8);
}

.section:last-of-type {
  padding-bottom: var(--space-6);
}

/* Work cards */
.work-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
}

.work-card:last-child {
  margin-bottom: 0;
}

.work-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
  flex-wrap: wrap;
}

.work-card-num {
  font-size: 13px;
  color: var(--text-secondary);
}

.work-card-cat {
  font-size: 13px;
  color: var(--text-secondary);
}

.work-card-title {
  font-size: 24px;
  font-weight: 500;
  margin-bottom: var(--space-2);
}

.work-card-desc {
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
}

.work-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
}

.tag {
  font-size: 12px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-secondary);
}

.work-card-link {
  font-weight: 500;
}

/* Portfolio / work card images */
.content-img {
  width: 100%;
  border-radius: 8px;
  display: block;
}

.image-caption {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: var(--space-2);
  line-height: 1.5;
}

figure.work-card-figure {
  margin: var(--space-4) 0 0;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  align-items: start;
}

.about-bio {
  color: var(--text-secondary);
}

.about-subheading {
  font-size: 14px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
  margin-top: var(--space-4);
}

.about-subheading:first-child {
  margin-top: 0;
}

.about-list {
  margin: 0;
  padding-left: 1.2em;
  color: var(--text-secondary);
}

.about-list li {
  margin-bottom: var(--space-1);
}

/* Contact */
.contact-heading {
  font-size: 32px;
  font-weight: 500;
  margin-bottom: var(--space-2);
}

.contact-sub {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
}

.contact-email {
  font-size: 18px;
  font-weight: 500;
}

.contact-links {
  margin-top: var(--space-3);
}

.contact-links a {
  margin-right: var(--space-4);
}

/* Footer */
.site-footer {
  padding: var(--space-6) var(--space-3);
  text-align: center;
  font-size: 14px;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
}

/* Mobile */
@media (max-width: 640px) {
  body {
    font-size: 13.6px;
  }

  .hero-name {
    font-size: 40.8px;
  }

  .hero-title {
    font-size: 15.3px;
  }

  .work-card-title {
    font-size: 20.4px;
  }

  .contact-heading {
    font-size: 27.2px;
  }

  .section-heading {
    font-size: 23.8px;
  }

  .nav-inner {
    flex-wrap: wrap;
  }

  .nav-left {
    flex: 1;
    min-width: 0;
    order: 1;
  }

  .nav-toggle {
    display: inline-flex;
    order: 2;
  }

  .site-nav {
    display: none;
    order: 3;
    flex-basis: 100%;
    width: 100%;
    margin-left: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    padding-top: var(--space-2);
    border-top: 1px solid var(--border);
  }

  .site-nav.is-open {
    display: flex;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }
}