/* Фон: лёгкая сетка без «шума» */
.grid-bg {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

.gradient-orb {
  position: fixed;
  width: min(42vmax, 520px);
  height: min(42vmax, 520px);
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 62%);
  top: -12vmax;
  right: -12vmax;
  pointer-events: none;
  z-index: 0;
  opacity: var(--orb-opacity);
}

.gradient-orb--bl {
  top: auto;
  bottom: -18vmax;
  left: -14vmax;
  right: auto;
  width: min(36vmax, 420px);
  height: min(36vmax, 420px);
  opacity: calc(var(--orb-opacity) * 0.65);
  background: radial-gradient(circle, color-mix(in srgb, var(--accent-glow) 70%, transparent) 0%, transparent 65%);
}

.portfolio-wrap {
  position: relative;
  z-index: 1;
}

.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

section {
  padding: var(--section-gap) 0;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 0.8125rem;
  font-weight: 600;
  margin: 0 0 1.25rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.section-title::after {
  content: '';
  flex: 1;
  min-width: 48px;
  max-width: 160px;
  height: 1px;
  background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 45%, transparent), transparent);
  opacity: 0.85;
}

/* Шапка сайта: навигация + тема */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: var(--site-header-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border);
  background: var(--header-bg);
  box-shadow: var(--shadow-header);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  backdrop-filter: blur(14px) saturate(1.2);
}

.site-header .container.site-header-inner {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  gap: 10px 12px;
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 6px var(--container-pad);
  min-width: 0;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.site-header .container.site-header-inner::-webkit-scrollbar {
  display: none;
}

.site-tagline {
  margin: 0;
  font-size: clamp(0.68rem, 1.4vw, 0.8125rem);
  color: var(--text-muted);
  line-height: 1.25;
  min-width: 0;
  flex: 1 1 auto;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-tagline strong {
  color: var(--text);
  font-weight: 600;
}

.site-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.site-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.3rem 0.65rem;
  min-height: 32px;
  font-size: clamp(0.7rem, 1.6vw, 0.8125rem);
  font-weight: 600;
  text-decoration: none;
  border-radius: 9px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: var(--card);
  transition: background 0.2s, border-color 0.2s, color 0.2s, box-shadow 0.2s;
}

.site-cta:hover {
  color: var(--text);
  border-color: var(--border-hover);
  background: var(--card-hover);
}

.site-cta--primary {
  color: var(--btn-primary-fg);
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 25%, transparent);
}

.site-cta--primary:hover {
  color: var(--btn-primary-fg);
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  box-shadow: 0 2px 12px var(--accent-glow);
}

.site-brand {
  flex-shrink: 0;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: -0.02em;
}

.site-brand:hover {
  color: var(--accent);
}

.site-brand:hover .site-logo-mark {
  color: var(--accent-hover);
}

.site-logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 2.25rem;
  min-height: 2.25rem;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: -0.06em;
  line-height: 1;
  color: var(--accent);
  background: none;
  border-radius: 0;
}

.site-header-actions,
.site-nav,
.theme-toggle {
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1.2vw, 12px);
  flex-wrap: nowrap;
  justify-content: flex-end;
}

.site-nav::-webkit-scrollbar {
  display: none;
}

/* Тёмная тема по умолчанию: солнце = перейти на светлую */
.theme-toggle .icon-sun {
  display: block;
}

.theme-toggle .icon-moon {
  display: none;
}

[data-theme="light"] .theme-toggle .icon-sun {
  display: none;
}

[data-theme="light"] .theme-toggle .icon-moon {
  display: block;
}

.site-nav a {
  font-size: clamp(0.7rem, 1.8vw, 0.8125rem);
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.35rem 0.45rem;
  border-radius: 6px;
}

.site-nav a:hover {
  color: var(--text);
  background: var(--skill-tag-bg);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin-left: 4px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  color: var(--text-muted);
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.theme-toggle:hover {
  color: var(--text);
  border-color: var(--border-hover);
  background: var(--card-hover);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

/* Узкий экран: шапка в несколько рядов — теглайн переносится, навигация влазит без горизонтального скролла */
@media (max-width: 639px) {
  html {
    scroll-padding-top: clamp(100px, 32vw, 160px);
  }

  .site-header {
    min-height: 0;
    align-items: stretch;
  }

  .site-header .container.site-header-inner {
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    grid-template-rows: auto auto auto;
    column-gap: 10px;
    row-gap: 8px;
    align-items: center;
    overflow-x: visible;
    overflow-y: visible;
    padding-top: 10px;
    padding-bottom: 10px;
  }

  .site-brand {
    grid-column: 1;
    grid-row: 1;
  }

  .site-header-actions {
    grid-column: 3;
    grid-row: 1;
    justify-self: end;
  }

  .theme-toggle {
    grid-column: 4;
    grid-row: 1;
    margin-left: 0;
  }

  .site-tagline {
    grid-column: 1 / -1;
    grid-row: 2;
    flex: none;
    white-space: normal;
    overflow: visible;
    text-overflow: unset;
    font-size: clamp(0.78rem, 3.2vw, 0.875rem);
    line-height: 1.45;
    letter-spacing: -0.01em;
  }

  .site-nav {
    grid-column: 1 / -1;
    grid-row: 3;
    flex-wrap: wrap;
    justify-content: flex-start;
    align-content: flex-start;
    gap: 2px 6px;
    width: 100%;
    min-width: 0;
    padding-top: 4px;
  }

  .site-nav a {
    padding: 0.4rem 0.45rem;
  }
}

/* Герой: сразу видно суть, без полноэкранной «пустоты» */
.hero {
  padding: clamp(1rem, 3vw, 1.75rem) 0 clamp(1.5rem, 4vw, 2.5rem);
  position: relative;
}

.hero .container {
  max-width: min(640px, 100%);
}

.hero h1 {
  font-size: clamp(1.5rem, 5vw, 2.35rem);
  font-weight: 700;
  margin: 0 0 0.4rem;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.hero .role {
  color: var(--accent);
  font-size: clamp(0.9rem, 2.5vw, 1.02rem);
  font-weight: 600;
  margin: 0 0 0.75rem;
  line-height: 1.35;
}

.hero .value {
  color: var(--text-muted);
  font-size: clamp(0.875rem, 2.2vw, 0.98rem);
  margin: 0 0 1rem;
  line-height: 1.5;
}

.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 1.25rem;
}

.hero-chip {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted-2);
  background: var(--skill-tag-bg);
  border: 1px solid var(--border);
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
}

.hero-cta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  min-height: 44px;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  border: 1px solid var(--border);
}

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

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

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

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

@media (min-width: 900px) {
  .hero .container {
    max-width: var(--content-max);
  }
}