/* ============ ПЕРЕМЕННЫЕ ТЕМ ============ */
:root {
  --bg: #ffffff;
  --bg-soft: #f4f5f7;
  --surface: #ffffff;
  --border: #e4e6eb;
  --text: #14161a;
  --text-soft: #5a6070;
  --accent: #4f46e5;
  --accent-contrast: #ffffff;
  --shadow: 0 6px 24px rgba(20, 22, 26, 0.08);
  --radius: 16px;
  --nav-h: 64px;
  --maxw: 1080px;
}

:root[data-theme="dark"] {
  --bg: #0d0f14;
  --bg-soft: #141821;
  --surface: #161b24;
  --border: #262c38;
  --text: #eef1f6;
  --text-soft: #9aa3b2;
  --accent: #7c78ff;
  --accent-contrast: #0d0f14;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.45);
}

/* ============ БАЗА ============ */
* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s ease, color 0.3s ease;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 20px;
}

.section { padding-block: 80px; }

/* ============ НАВИГАЦИЯ ============ */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.nav__logo { font-weight: 800; font-size: 1.25rem; letter-spacing: 0.5px; }
.nav__logo span { color: var(--accent); }

.nav__links { display: flex; gap: 4px; }
.nav__link {
  padding: 8px 14px;
  border-radius: 10px;
  color: var(--text-soft);
  font-weight: 500;
  transition: color 0.2s, background 0.2s;
}
.nav__link:hover { color: var(--text); background: var(--bg-soft); }
.nav__link.is-active { color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); }

.nav__actions { display: flex; align-items: center; gap: 8px; }

.theme-toggle {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 10px;
  cursor: pointer;
  transition: border-color 0.2s, transform 0.1s;
}
.theme-toggle:hover { border-color: var(--accent); }
.theme-toggle:active { transform: scale(0.94); }

.lang-toggle {
  height: 40px;
  padding: 0 12px;
  display: grid; place-items: center;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 10px;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: border-color 0.2s, transform 0.1s;
}
.lang-toggle:hover { border-color: var(--accent); }
.lang-toggle:active { transform: scale(0.94); }
.theme-toggle__moon { display: none; }
:root[data-theme="dark"] .theme-toggle__sun { display: none; }
:root[data-theme="dark"] .theme-toggle__moon { display: block; }

/* Бургер (скрыт на десктопе) */
.nav__burger {
  display: none;
  width: 40px; height: 40px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 10px;
  cursor: pointer;
  padding: 0 10px;
}
.nav__burger span {
  height: 2px; width: 100%;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.2s;
}
.nav__burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger.is-open span:nth-child(2) { opacity: 0; }
.nav__burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ КНОПКИ ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 12px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.1s, opacity 0.2s, border-color 0.2s;
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--accent); color: var(--accent-contrast); }
.btn--primary:hover { opacity: 0.9; }
.btn--ghost { border-color: var(--border); color: var(--text); }
.btn--ghost:hover { border-color: var(--accent); }

/* ============ HERO / РЕЗЮМЕ ============ */
.hero { padding-top: 64px; }
.hero__inner {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
  align-items: center;
}
.hero__photo-placeholder {
  aspect-ratio: 1;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--bg-soft), color-mix(in srgb, var(--accent) 18%, var(--bg-soft)));
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  color: var(--text-soft);
  font-weight: 700;
  letter-spacing: 2px;
}
.hero__photo img { display: block; width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 24px; border: 1px solid var(--border); }

.hero__eyebrow { color: var(--text-soft); font-weight: 600; }
.hero__name { font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.1; margin: 4px 0 8px; }
.hero__role { color: var(--accent); font-weight: 600; font-size: 1.1rem; margin-bottom: 16px; }
.hero__lead { color: var(--text-soft); max-width: 56ch; margin-bottom: 24px; }

.hero__quick { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 20px; }
.hero__links { display: flex; flex-wrap: wrap; gap: 20px; }
.hero__links a { color: var(--text-soft); font-weight: 500; border-bottom: 1px solid transparent; transition: color 0.2s, border-color 0.2s; }
.hero__links a:hover { color: var(--accent); border-color: var(--accent); }

/* Навыки */
.skills { margin-top: 72px; }
.skills__title { font-size: 1.4rem; margin-bottom: 20px; }
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}
.skill-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.skill-group h3 { font-size: 0.95rem; color: var(--text-soft); margin-bottom: 12px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips li {
  padding: 6px 12px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
}
.chips--sm li { padding: 4px 10px; font-size: 0.78rem; }

/* Гибкие навыки — это фразы, а не теги: мягкие прямоугольники вместо «таблеток» */
.skills > .chips li { border-radius: 12px; padding: 10px 16px; line-height: 1.45; }

/* Образование */
.edu { display: grid; gap: 14px; }
.edu__item {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 20px;
  align-items: start;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.edu__period { color: var(--accent); font-weight: 600; font-size: 0.9rem; }
.edu__title { font-size: 1rem; }
.edu__meta { color: var(--text-soft); font-size: 0.9rem; margin-top: 2px; }
@media (max-width: 720px) {
  .edu__item { grid-template-columns: 1fr; gap: 4px; }
}

/* ============ ЗАГОЛОВКИ СЕКЦИЙ ============ */
.section__head { margin-bottom: 40px; max-width: 60ch; }
.section__eyebrow { color: var(--accent); font-weight: 600; text-transform: uppercase; letter-spacing: 1px; font-size: 0.8rem; }
.section__title { font-size: clamp(1.8rem, 4vw, 2.6rem); margin: 6px 0 10px; }
.section__desc { color: var(--text-soft); }

/* ============ ПОРТФОЛИО ============ */
.portfolio { background: var(--bg-soft); }
.projects {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.project {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s, border-color 0.2s;
}
.project:hover { transform: translateY(-4px); border-color: var(--accent); }
.project__thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  display: grid; place-items: center;
  font-size: 2.5rem; font-weight: 800;
  color: color-mix(in srgb, var(--accent) 55%, var(--text-soft));
  background: linear-gradient(135deg, var(--bg-soft), color-mix(in srgb, var(--accent) 14%, var(--bg-soft)));
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.project__thumb img {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.project__badge {
  position: absolute;
  z-index: 2;
  top: 12px; left: 12px;
  padding: 4px 10px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.3px;
  color: var(--accent-contrast);
  background: var(--accent);
  border-radius: 999px;
}
.project__body { padding: 20px; display: flex; flex-direction: column; flex: 1; }
.project__title { font-size: 1.2rem; margin-bottom: 8px; }
.project__desc { color: var(--text-soft); font-size: 0.95rem; margin-bottom: 10px; }
.project__role { font-size: 0.9rem; margin-bottom: 14px; }
.project__role strong { color: var(--text); }
.project__body .chips--sm { margin-top: auto; }
.project__links { display: flex; flex-wrap: wrap; gap: 8px 12px; margin-top: 14px; }
.project__links a { color: var(--accent); font-weight: 600; font-size: 0.82rem; white-space: nowrap; }
.project__links a:hover { text-decoration: underline; }

/* ============ КОНТАКТЫ ============ */
.contacts__grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}
.contact-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1 1 220px;
  min-width: 0;
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform 0.15s, border-color 0.2s;
}
.contact-card:hover { transform: translateY(-3px); border-color: var(--accent); }
.contact-card--static { cursor: default; }
.contact-card--static:hover { transform: none; border-color: var(--border); }
.contact-card--emails { cursor: default; }
.contact-card--emails:hover { transform: none; border-color: var(--border); }
.contact-card--emails a { color: inherit; text-decoration: none; transition: color 0.15s ease; }
.contact-card--emails a:hover { color: var(--accent); }
.contact-card__label { color: var(--text-soft); font-size: 0.85rem; }
.contact-card__value {
  font-weight: 600;
  font-size: 1.02rem;
  overflow-wrap: anywhere;
}
.contact-card__value--email { font-size: 0.82rem; }

/* ============ ФУТЕР ============ */
.footer { border-top: 1px solid var(--border); padding-block: 24px; }
.footer__inner { display: flex; justify-content: space-between; align-items: center; color: var(--text-soft); font-size: 0.9rem; }
.footer__top:hover { color: var(--accent); }

/* ============ ПЛАНШЕТ ============ */
@media (max-width: 900px) {
  .skills__grid { grid-template-columns: 1fr 1fr; }
}

/* ============ МОБИЛЬНАЯ ВЁРСТКА ============ */
@media (max-width: 720px) {
  .section { padding-block: 56px; }

  /* мобильное меню — выпадающая панель */
  .nav__links {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 4px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 16px 20px 24px;
    transform: translateY(-120%);
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.28s ease, visibility 0.28s ease;
    box-shadow: var(--shadow);
  }
  .nav__links.is-open { transform: translateY(0); visibility: visible; pointer-events: auto; }
  .nav__link { padding: 12px 14px; }

  .nav__burger { display: flex; }

  .hero__inner {
    grid-template-columns: 1fr;
    gap: 28px;
    text-align: center;
  }
  .hero__photo { max-width: 180px; margin-inline: auto; }
  .hero__lead { margin-inline: auto; }
  .hero__quick, .hero__links { justify-content: center; }

  .skills__grid { grid-template-columns: 1fr; }
  .skills { margin-top: 48px; }

  .footer__inner { flex-direction: column; gap: 10px; }
}

@media (max-width: 400px) {
  .container { padding-inline: 16px; }
  .btn { flex: 1; }
}

/* уважение к настройкам «уменьшить движение» */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}