/* ==========================================================================
   Владимир — портфолио веб-разработчика
   Чистый CSS, без сборщика. Переменные темы + JS-тоггл (data-theme на <html>)
   ========================================================================== */

:root {
  --bg-primary: #f7f7fb;
  --bg-secondary: #ffffff;
  --surface: #ffffff;
  --surface-2: #eef0f7;
  --surface-3: #e2e5f0;
  --text-primary: #14141f;
  --text-secondary: #52546a;
  --text-muted: #8688a0;
  --border-color: #e3e5ef;
  --accent: #5b5bf6;
  --accent-hover: #4747dd;
  --accent-contrast: #ffffff;
  --shadow: rgba(20, 20, 31, 0.08);
  --shadow-strong: rgba(20, 20, 31, 0.16);

  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --container-width: 1160px;
  --radius: 16px;
  --radius-sm: 10px;
  --transition: 0.2s ease;
}

html[data-theme="dark"] {
  --bg-primary: #0f0f17;
  --bg-secondary: #15151f;
  --surface: #181822;
  --surface-2: #1f202c;
  --surface-3: #262837;
  --text-primary: #f2f2f7;
  --text-secondary: #b6b7c9;
  --text-muted: #7d7f94;
  --border-color: #2a2b3a;
  --accent: #7c7cff;
  --accent-hover: #9494ff;
  --accent-contrast: #0f0f17;
  --shadow: rgba(0, 0, 0, 0.35);
  --shadow-strong: rgba(0, 0, 0, 0.55);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4, p { margin: 0; }
button { font: inherit; cursor: pointer; }
section { scroll-margin-top: 84px; }

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-head {
  max-width: 640px;
  margin: 0 auto 48px;
  text-align: center;
}

h2 {
  font-size: clamp(1.6rem, 1.3rem + 1.2vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.section-sub {
  margin-top: 12px;
  color: var(--text-secondary);
  font-size: 1.05rem;
}

section { padding: 88px 0; }
section:nth-of-type(even) { background: var(--bg-secondary); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  border: 1px solid transparent;
  transition: transform var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--accent);
  color: var(--accent-contrast);
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-outline {
  background: transparent;
  border-color: var(--border-color);
  color: var(--text-primary);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm { padding: 10px 20px; font-size: 0.9rem; }
.btn-block { width: 100%; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg-primary) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.logo span { color: var(--accent); }
.nav-list {
  display: flex;
  gap: 28px;
}
.nav-list a {
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.nav-list a:hover { color: var(--text-primary); }
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  transition: border-color var(--transition), background var(--transition);
}
.theme-toggle:hover { border-color: var(--accent); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: none; }
html[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
html[data-theme="dark"] .theme-toggle .icon-sun { display: block; }

.burger {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background: var(--surface);
  position: relative;
}
.burger span,
.burger span::before,
.burger span::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--transition), opacity var(--transition);
}
.burger span { top: 19px; }
.burger span::before { top: -6px; }
.burger span::after { top: 6px; }
.burger.is-active span { background: transparent; }
.burger.is-active span::before { transform: translateY(6px) rotate(45deg); }
.burger.is-active span::after { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  padding: 72px 0 96px;
}
.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(2rem, 1.5rem + 2vw, 3.1rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.12;
}
.hero h1 span { color: var(--accent); }
.hero-sub {
  margin-top: 20px;
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 480px;
}
.hero-actions {
  margin-top: 32px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.hero-photo {
  aspect-ratio: 4 / 5;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 24px 48px var(--shadow-strong);
}

/* ---------- Placeholder media (для фото/скриншотов, которые Владимир добавит сам) ---------- */
.ph {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 16px;
  background: linear-gradient(135deg, var(--surface-2), var(--surface-3));
  color: var(--text-muted);
  font-size: 0.85rem;
  overflow: hidden;
}
.ph::before {
  content: attr(data-label);
}
.ph img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Фото Владимира в Hero — отдельная версия под каждую тему */
.theme-img-dark { display: none; }
html[data-theme="dark"] .theme-img-light { display: none; }
html[data-theme="dark"] .theme-img-dark { display: block; }

/* ---------- Обо мне ---------- */
.about .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}
.about-text {
  max-width: 760px;
  color: var(--text-secondary);
  font-size: 1.05rem;
}
.about-text p + p { margin-top: 16px; }
.stack {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.badge {
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border-color);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ---------- Услуги ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}
.service-card {
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform var(--transition), box-shadow var(--transition);
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px var(--shadow);
}
.service-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 18px;
}
.service-icon svg { width: 24px; height: 24px; }
.service-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.service-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}
.service-tag {
  display: inline-block;
  margin-top: 14px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  background: var(--surface-2);
  padding: 4px 10px;
  border-radius: 999px;
}

/* ---------- Портфолио ---------- */
.portfolio-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
@media (min-width: 720px) {
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
}
.project-card {
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition);
}
.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px var(--shadow);
}
@media (min-width: 720px) {
  .project-card--wide { grid-column: 1 / -1; }
  .project-card--wide .project-thumb { aspect-ratio: 32 / 10; }
}
.project-thumb { aspect-ratio: 16 / 10; }
.project-body {
  padding: 22px 24px 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.project-body h3 {
  font-size: 1.15rem;
  font-weight: 700;
}
.project-body p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  flex: 1;
}
.project-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 4px 0 6px;
}
.chip {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-secondary);
}
.chip-demo {
  display: inline-block;
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  margin-left: 8px;
  vertical-align: middle;
  white-space: nowrap;
}
.project-links {
  display: flex;
  gap: 10px;
  margin-top: 8px;
  flex-wrap: wrap;
}
.project-links-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.9rem;
}
.project-links-list a { color: var(--accent); font-weight: 600; }
.project-links-list a:hover { text-decoration: underline; }

/* ---------- Цены ---------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}
.price-card {
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: left;
}
.price-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.price-value {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 8px;
}
.price-value span {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
}
.price-card p.price-desc {
  color: var(--text-secondary);
  font-size: 0.92rem;
}
.pricing-note {
  margin-top: 28px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.92rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- Контакты ---------- */
.contacts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}
.contact-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), transform var(--transition);
}
.contact-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}
.contact-icon svg { width: 22px; height: 22px; }
.contact-card .contact-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.contact-card .contact-value {
  font-weight: 700;
  font-size: 1rem;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-contacts {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}
.footer-contacts a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition);
}
.footer-contacts a:hover { color: var(--accent); }
.footer-copy {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ---------- Кейс-страницы ---------- */
.case-hero {
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--border-color);
}
.breadcrumb {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--accent); }
.case-hero h1 {
  font-size: clamp(1.8rem, 1.5rem + 1.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  max-width: 760px;
}
.case-meta {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  margin-top: 24px;
}
.case-meta div { min-width: 140px; }
.case-meta .label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 4px;
}
.case-meta .value { font-weight: 600; }
.case-cover { margin-top: 32px; aspect-ratio: 16/8; border-radius: var(--radius); overflow: hidden; }

.case-block { padding: 56px 0; border-bottom: 1px solid var(--border-color); }
.case-block:last-of-type { border-bottom: none; }
.case-block h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 20px; }
.case-block .lead { color: var(--text-secondary); font-size: 1.05rem; max-width: 760px; }
.case-feature-list {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
}
.case-feature-list li {
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
}
.case-shots {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}
.case-shots .ph { aspect-ratio: 16/10; border-radius: var(--radius-sm); }
.case-cta {
  text-align: center;
  padding: 72px 0;
}
.case-cta h2 { margin-bottom: 16px; }
.case-cta p { color: var(--text-secondary); margin-bottom: 28px; }

/* ---------- Адаптив ---------- */
@media (max-width: 900px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-photo { max-width: 360px; margin: 0 auto; }
  .about .container { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .nav-list {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 24px;
    gap: 18px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition), opacity var(--transition);
  }
  .nav-list.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .burger { display: block; }
  section { padding: 64px 0; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}
