/* ==========================================================================
   Ziehm RU — Design System
   Строится по спецификации CLAUDE.md (разделы 4–8)
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 2. Design tokens ---------- */
:root{
  /* Цвета (утверждённая палитра) */
  --c-primary: #0F797B;
  --c-primary-hover: #0D6668;
  --c-primary-active: #0B5658;
  --c-surface: #F6F6F6;
  --c-base: #FFFFFF;
  --c-text-body: #3F4548;
  --c-text-heading: #2D2E2F;
  --c-accent-light: #81C1C5;
  --c-border: #E1E1E1;
  --c-hero-overlay: rgba(45,46,47,0.55);
  --c-success: #3E8E5A;
  --c-error: #C4453A;
  --c-disabled: #B9BDBE;

  /* Типографика */
  --font-primary: 'Inter', -apple-system, 'Segoe UI', Arial, sans-serif;

  --fs-display: 34px;
  --fs-h1: 28px;
  --fs-h2: 24px;
  --fs-h3: 20px;
  --fs-h4: 18px;
  --fs-lead: 17px;
  --fs-body: 16px;
  --fs-body-sm: 14px;
  --fs-caption: 12px;
  --fs-button: 15px;
  --fs-stat: 32px;

  /* Отступы секций */
  --section-pad: 48px;
  --container-max: 100%;
  --container-margin: 16px;

  /* Радиусы / тени */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-card: 0 2px 12px rgba(45,46,47,0.08);
  --shadow-card-hover: 0 8px 24px rgba(45,46,47,0.14);
  --shadow-header: 0 2px 8px rgba(45,46,47,0.06);
  --shadow-dropdown: 0 12px 32px rgba(45,46,47,0.12);

  --transition-base: 0.25s ease;
}

@media (min-width: 768px){
  :root{
    --section-pad: 64px;
    --container-margin: 32px;
  }
}
@media (min-width: 1024px){
  :root{
    --fs-display: 56px;
    --fs-h1: 40px;
    --fs-h2: 32px;
    --fs-h3: 24px;
    --fs-h4: 20px;
    --fs-lead: 18px;
    --fs-button: 16px;
    --fs-stat: 48px;
    --section-pad: 80px;
    --container-max: 1140px;
    --container-margin: 40px;
  }
}
@media (min-width: 1280px){
  :root{ --container-max: 1200px; --container-margin: 48px; }
}
@media (min-width: 1440px){
  :root{
    --section-pad: 96px;
    --container-max: 1320px;
    --container-margin: 64px;
  }
}

/* ---------- 3. Base ---------- */
html, body { background: var(--c-base); }
body{
  font-family: var(--font-primary);
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--c-text-body);
  -webkit-font-smoothing: antialiased;
}
h1,h2,h3,h4{ color: var(--c-text-heading); font-weight: 600; }
h1{ font-size: var(--fs-h1); font-weight: 700; line-height: 1.15; letter-spacing: -0.01em; }
h2{ font-size: var(--fs-h2); line-height: 1.2; letter-spacing: -0.01em; }
h3{ font-size: var(--fs-h3); line-height: 1.25; }
h4{ font-size: var(--fs-h4); line-height: 1.3; }
.display{ font-size: var(--fs-display); font-weight: 700; line-height: 1.1; letter-spacing: -0.02em; color: var(--c-text-heading); }
.lead{ font-size: var(--fs-lead); line-height: 1.6; }
.body-sm{ font-size: var(--fs-body-sm); line-height: 1.5; }
.caption{ font-size: var(--fs-caption); font-weight: 500; line-height: 1.4; letter-spacing: 0.02em; }
p{ max-width: 720px; }
p.no-max{ max-width: none; }
:focus-visible{ outline: 2px solid var(--c-primary); outline-offset: 2px; }

/* ---------- 4. Layout ---------- */
.container{
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-margin);
}
.section{ padding-block: var(--section-pad); }
.section--surface{ background: var(--c-surface); }
.section--dark{ background: var(--c-text-heading); color: rgba(255,255,255,0.85); }
.section--dark h1, .section--dark h2, .section--dark h3, .section--dark h4{ color: #fff; }
.section--accent{ background: var(--c-accent-light); }
.grid{ display: grid; gap: 24px; }
.grid-2{ grid-template-columns: 1fr; }
.grid-3{ grid-template-columns: 1fr; }
.grid-4{ grid-template-columns: repeat(2, 1fr); }
@media (min-width: 768px){
  .grid-2{ grid-template-columns: repeat(2, 1fr); }
  .grid-3{ grid-template-columns: repeat(2, 1fr); }
  .grid-4{ grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px){
  .grid-3{ grid-template-columns: repeat(3, 1fr); }
  .grid-4{ grid-template-columns: repeat(4, 1fr); }
}
.flex{ display: flex; }
.flex-col{ display: flex; flex-direction: column; }
.items-center{ align-items: center; }
.justify-between{ justify-content: space-between; }
.gap-sm{ gap: 8px; } .gap-md{ gap: 16px; } .gap-lg{ gap: 32px; }
.two-col{ display: grid; grid-template-columns: 1fr; gap: 32px; align-items: center; }
@media (min-width: 1024px){ .two-col{ grid-template-columns: 1fr 1fr; gap: 64px; } }
.section-head{ max-width: 720px; margin-bottom: 40px; }
.section-head.center{ margin-inline: auto; text-align: center; }
.mt-xs{margin-top:8px;} .mt-sm{margin-top:16px;} .mt-md{margin-top:24px;} .mt-lg{margin-top:40px;}
.text-muted{ color: var(--c-text-body); opacity: .75; }

/* ---------- 5. Header / Navigation ---------- */
.site-header{
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}
.site-header.is-scrolled{ box-shadow: var(--shadow-header); border-color: var(--c-border); }
.header-inner{
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; transition: height var(--transition-base);
}
.site-header.is-scrolled .header-inner{ height: 60px; }
.brand img{ height: 34px; width: auto; }
.main-nav{ display: none; }
@media (min-width: 1024px){
  .main-nav{ display: flex; align-items: center; gap: 0; }
}
@media (min-width: 1280px){
  .main-nav{ gap: 2px; }
}
.nav-item{ position: relative; }
.nav-link{
  display: flex; align-items: center; gap: 4px; white-space: nowrap;
  padding: 10px 11px; font-weight: 600; font-size: 12.5px;
  text-transform: uppercase; letter-spacing: 0.015em;
  color: var(--c-text-heading); border-radius: var(--radius-sm);
  transition: color var(--transition-base);
}
@media (min-width: 1280px){
  .nav-link{ padding: 10px 14px; font-size: 13px; }
}
.nav-link:hover, .nav-item.is-open .nav-link, .nav-link.is-active{ color: var(--c-primary); }
.nav-link .chev{ width: 10px; height: 10px; transition: transform var(--transition-base); }
.nav-item.is-open .nav-link .chev{ transform: rotate(180deg); }
.dropdown{
  position: absolute; top: 100%; left: 0; min-width: 340px;
  background: var(--c-base); border-radius: var(--radius-md);
  box-shadow: var(--shadow-dropdown); padding: 12px;
  margin-top: 8px; opacity: 0; visibility: hidden; transform: translateY(6px);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
}
.nav-item.is-open .dropdown{ opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a{
  display: block; padding: 12px 16px; border-radius: var(--radius-sm);
  font-size: var(--fs-body-sm); font-weight: 500; color: var(--c-text-body);
}
.dropdown a:hover{ background: var(--c-surface); color: var(--c-primary); }
.header-cta{ display: none; }
@media (min-width: 1024px){ .header-cta{ display: inline-flex; } }
.burger{
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: var(--radius-sm);
}
.burger span, .burger span::before, .burger span::after{
  content: ""; display: block; width: 22px; height: 2px; background: var(--c-text-heading);
  position: relative; transition: transform var(--transition-base), opacity var(--transition-base);
}
.burger span::before{ position: absolute; top: -7px; }
.burger span::after{ position: absolute; top: 7px; }
@media (min-width: 1024px){ .burger{ display: none; } }
.mobile-menu{
  position: fixed; inset: 0 0 0 auto; width: 85%; max-width: 360px; height: 100%;
  background: var(--c-base); z-index: 200; box-shadow: -8px 0 24px rgba(45,46,47,0.2);
  transform: translateX(100%); transition: transform var(--transition-base);
  overflow-y: auto; padding: 24px;
}
.mobile-menu.is-open{ transform: translateX(0); }
.mobile-menu-overlay{
  position: fixed; inset: 0; background: var(--c-hero-overlay); z-index: 199;
  opacity: 0; visibility: hidden; transition: opacity var(--transition-base), visibility var(--transition-base);
}
.mobile-menu-overlay.is-open{ opacity: 1; visibility: visible; }
.mobile-menu .m-close{ width: 40px; height: 40px; margin-left: auto; display:flex; align-items:center; justify-content:center; }
.mobile-menu ul{ margin-top: 16px; }
.mobile-menu > ul > li{ border-bottom: 1px solid var(--c-border); }
.mobile-menu .m-link{ display: flex; align-items:center; justify-content: space-between; padding: 16px 4px; min-height: 52px; font-weight: 600; }
.mobile-menu .m-sub{ max-height: 0; overflow: hidden; transition: max-height var(--transition-base); }
.mobile-menu li.is-open .m-sub{ max-height: 400px; }
.mobile-menu .m-sub a{ display: block; padding: 12px 4px 12px 16px; font-size: var(--fs-body-sm); color: var(--c-text-body); }
.mobile-menu .m-cta{ margin-top: 24px; }

.breadcrumbs{ display: flex; flex-wrap: wrap; gap: 6px; font-size: var(--fs-body-sm); color: var(--c-text-body); }
.breadcrumbs a{ color: var(--c-primary); }
.breadcrumbs .sep{ opacity: .5; }
.breadcrumbs .current{ color: var(--c-text-heading); }

/* ---------- 6. Buttons ---------- */
.btn{
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 44px; padding: 0 24px; border-radius: var(--radius-sm);
  font-size: var(--fs-button); font-weight: 600; letter-spacing: 0.01em;
  transition: background var(--transition-base), color var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
  white-space: nowrap;
}
@media (min-width: 768px){ .btn{ height: 48px; padding: 0 28px; } }
.btn-primary{ background: var(--c-primary); color: #fff; }
.btn-primary:hover{ background: var(--c-primary-hover); }
.btn-primary:active{ background: var(--c-primary-active); }
.btn-secondary{ background: transparent; color: var(--c-primary); border: 1.5px solid var(--c-primary); }
.btn-secondary:hover{ background: var(--c-primary); color: #fff; }
.btn-ghost{ background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,0.5); }
.btn-ghost:hover{ border-color: #fff; background: rgba(255,255,255,0.08); }
.btn-text{ height: auto; padding: 0; color: var(--c-primary); font-weight: 600; }
.btn-text:hover{ text-decoration: underline; }
.btn-block{ width: 100%; }
.btn[disabled]{ background: var(--c-disabled); color: #fff; border-color: var(--c-disabled); cursor: not-allowed; }
.btn .arrow{ transition: transform var(--transition-base); }
.btn:hover .arrow{ transform: translateX(4px); }

/* ---------- 7. Cards ---------- */
.card{
  background: var(--c-base); border-radius: var(--radius-md); box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  display: flex; flex-direction: column; overflow: hidden; height: 100%;
}
.card:hover{ box-shadow: var(--shadow-card-hover); transform: translateY(-4px); }
.card-media{ aspect-ratio: 4/3; background: var(--c-surface); overflow: hidden; }
.card-media img{ width: 100%; height: 100%; object-fit: contain; }
.card-media.cover img{ object-fit: cover; }
.card-body{ padding: 24px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.card-body .badges{ display: flex; flex-wrap: wrap; gap: 6px; }
.card-body .card-link{ margin-top: auto; }

.feature-card{ display: flex; flex-direction: column; gap: 14px; }
.feature-icon{
  width: 56px; height: 56px; border-radius: var(--radius-md);
  background: rgba(129,193,197,0.25); color: var(--c-primary);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.feature-icon svg{ width: 26px; height: 26px; stroke: currentColor; fill: none; stroke-width: 1.6; }

.testimonial-card{
  background: var(--c-surface); border-radius: var(--radius-md); padding: 32px;
  display: flex; flex-direction: column; gap: 16px; height: 100%;
}
.testimonial-card .quote-mark{ color: var(--c-accent-light); font-size: 40px; line-height: 1; font-weight: 700; }
.testimonial-author{ display: flex; align-items: center; gap: 12px; margin-top: auto; }
.testimonial-avatar{
  width: 48px; height: 48px; border-radius: 50%; background: var(--c-accent-light);
  color: var(--c-text-heading); display: flex; align-items: center; justify-content: center;
  font-weight: 700; flex-shrink: 0;
}

.video-card{ cursor: pointer; }
.video-thumb{ position: relative; aspect-ratio: 16/9; border-radius: var(--radius-md); overflow: hidden; background: var(--c-text-heading); }
.video-thumb img{ width: 100%; height: 100%; object-fit: cover; opacity: .85; }
.video-thumb::after{ content: ""; position: absolute; inset: 0; background: rgba(45,46,47,0.25); }
.video-play{
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: 56px; height: 56px; border-radius: 50%; background: #fff; z-index: 2;
  display: flex; align-items: center; justify-content: center; transition: width var(--transition-base), height var(--transition-base);
}
.video-thumb:hover .video-play{ width: 64px; height: 64px; }
.video-play svg{ width: 20px; height: 20px; fill: var(--c-primary); margin-left: 3px; }
.video-duration{
  position: absolute; top: 12px; right: 12px; z-index: 2; background: rgba(45,46,47,0.8); color: #fff;
  padding: 3px 8px; border-radius: 3px; font-size: var(--fs-caption);
}

/* ---------- 8. Badges ---------- */
.badge{
  display: inline-flex; align-items: center; padding: 6px 14px; border-radius: 999px;
  font-size: var(--fs-caption); font-weight: 500; white-space: nowrap;
}
.badge-neutral{ background: var(--c-surface); color: var(--c-text-body); }
.badge-accent{ background: rgba(129,193,197,0.2); color: var(--c-primary); }
.badge-on-photo{ background: rgba(255,255,255,0.9); color: var(--c-text-heading); }

/* ---------- 9. Hero ---------- */
.hero{
  position: relative; color: #fff; display: flex; align-items: flex-end;
  min-height: 420px; background: var(--c-text-heading);
}
@media (min-width: 768px){ .hero{ min-height: 560px; } }
.hero-bg{ position: absolute; inset: 0; }
.hero-bg img{ width: 100%; height: 100%; object-fit: cover; }
.hero-bg::after{ content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(45,46,47,0.85) 0%, rgba(45,46,47,0.45) 55%, rgba(45,46,47,0.25) 100%); }
.hero-content{ position: relative; z-index: 2; padding-block: 48px; max-width: 760px; }
.hero-actions{ display: flex; flex-wrap: wrap; gap: 16px; margin-top: 28px; }

.page-hero{ background: var(--c-text-heading); color: #fff; padding-block: 56px; }
.page-hero .breadcrumbs{ color: rgba(255,255,255,0.65); margin-bottom: 16px; }
.page-hero .breadcrumbs a{ color: rgba(255,255,255,0.85); }
.page-hero .breadcrumbs .current{ color: #fff; }
.page-hero h1{ color: #fff; }

/* ---------- 10. Product page bits ---------- */
.product-hero-media{ border-radius: var(--radius-lg); overflow: hidden; background: var(--c-surface); aspect-ratio: 4/3; }
.product-hero-media img{ width: 100%; height: 100%; object-fit: contain; }
.advantage-list{ display: grid; gap: 16px; grid-template-columns: 1fr; }
@media (min-width: 768px){ .advantage-list{ grid-template-columns: repeat(2,1fr); } }
.advantage-item{ display: flex; gap: 12px; align-items: flex-start; }
.advantage-item .dot{ width: 20px; height:20px; border-radius: 50%; background: var(--c-primary); flex-shrink: 0; margin-top: 3px; position: relative; }
.advantage-item .dot::after{ content:""; position:absolute; inset:6px; border-radius:1px; background:#fff; clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 45% 62%); }
.equipment-list{ columns: 1; gap: 32px; }
@media (min-width: 768px){ .equipment-list{ columns: 2; } }
.equipment-list li{ break-inside: avoid; padding: 8px 0 8px 22px; position: relative; border-bottom: 1px solid var(--c-border); }
.equipment-list li::before{ content: "—"; position: absolute; left: 0; color: var(--c-primary); }
.tag-list{ display: flex; flex-wrap: wrap; gap: 8px; }
.feature-columns{ columns: 1; gap: 32px; }
@media (min-width: 768px){ .feature-columns{ columns: 2; } }
.feature-columns li{ break-inside: avoid; padding: 8px 0 8px 22px; position: relative; }
.feature-columns li::before{ content: "•"; position: absolute; left: 4px; color: var(--c-accent-light); font-size: 20px; line-height: 1; }

/* ---------- Legal / privacy policy text ---------- */
.legal-content h3{ margin-top: 40px; }
.legal-content p{ margin-top: 12px; max-width: none; }
.legal-content .legal-list{ margin-top: 12px; }
.legal-content .legal-list li{ padding: 6px 0 6px 22px; position: relative; }
.legal-content .legal-list li::before{ content: "—"; position: absolute; left: 0; color: var(--c-primary); }
.legal-content .legal-terms dt{ font-weight: 600; color: var(--c-text-heading); margin-top: 14px; }
.legal-content .legal-terms dd{ margin: 4px 0 0; color: var(--c-text-body); }
.legal-content .legal-card{ background: var(--c-surface); border-radius: var(--radius-md); padding: 24px; margin-top: 16px; }
.legal-content .legal-card p{ margin-top: 6px; }
.legal-content .legal-meta{ color: var(--c-text-body); opacity: .7; }

/* ---------- 11. Tables ---------- */
.spec-table{ width: 100%; border-radius: var(--radius-md); overflow: hidden; }
.spec-table tr:nth-child(odd){ background: var(--c-base); }
.spec-table tr:nth-child(even){ background: var(--c-surface); }
.spec-table td{ padding: 14px 20px; border-bottom: 1px solid var(--c-border); vertical-align: top; }
.spec-table td:first-child{ font-weight: 600; color: var(--c-text-heading); width: 38%; }
.spec-table-wrap{ overflow-x: auto; -webkit-overflow-scrolling: touch; }
.spec-cards{ display: none; }
@media (max-width: 639px){
  .spec-table{ display: none; }
  .spec-cards{ display: grid; gap: 12px; }
  .spec-cards .spec-card{ background: var(--c-surface); border-radius: var(--radius-sm); padding: 14px 16px; }
  .spec-cards .spec-card .k{ font-size: var(--fs-caption); color: var(--c-text-body); opacity: .7; margin-bottom: 4px; }
  .spec-cards .spec-card .v{ font-weight: 600; color: var(--c-text-heading); }
}
.compare-table thead th{ background: var(--c-text-heading); color: #fff; padding: 14px 20px; text-align: left; font-weight: 600; font-size: var(--fs-body-sm); }
.compare-table td{ padding: 12px 20px; border-bottom: 1px solid var(--c-border); }
.compare-table tbody tr:nth-child(even){ background: var(--c-surface); }

/* ---------- 12. Stats ---------- */
.stat{ text-align: left; }
.stat .stat-number{ font-size: var(--fs-stat); font-weight: 700; color: var(--c-primary); line-height: 1; }
.stat .stat-label{ margin-top: 8px; font-size: var(--fs-body-sm); color: var(--c-text-body); }
.section--dark .stat .stat-label{ color: rgba(255,255,255,0.7); }

/* ---------- 13. Forms ---------- */
.form-field{ display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.form-field label{ font-size: var(--fs-body-sm); font-weight: 500; color: var(--c-text-heading); }
.form-field label .req{ color: var(--c-error); margin-left: 2px; }
.form-field input, .form-field select, .form-field textarea{
  background: var(--c-surface); border: 1px solid transparent; border-radius: var(--radius-sm);
  padding: 12px 16px; height: 48px; color: var(--c-text-heading); font-size: var(--fs-body);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.form-field textarea{ height: auto; min-height: 120px; resize: vertical; }
.form-field input::placeholder, .form-field textarea::placeholder{ color: rgba(63,69,72,0.6); }
.form-field input:focus, .form-field select:focus, .form-field textarea:focus{
  outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(15,121,123,0.15);
}
.form-field.has-error input, .form-field.has-error select, .form-field.has-error textarea{ border-color: var(--c-error); }
.form-field.has-success input{ border-color: var(--c-success); }
.form-error-msg{ font-size: var(--fs-caption); color: var(--c-error); display: none; align-items: center; gap: 4px; }
.form-field.has-error .form-error-msg{ display: flex; }
.form-row{ display: grid; gap: 20px; grid-template-columns: 1fr; }
@media (min-width: 640px){ .form-row{ grid-template-columns: 1fr 1fr; } }
.checkbox-field{ display: flex; align-items: flex-start; gap: 10px; }
.checkbox-field input[type="checkbox"]{
  appearance: none; width: 20px; height: 20px; border: 1.5px solid var(--c-primary);
  border-radius: 4px; flex-shrink: 0; margin-top: 2px; position: relative; background: #fff;
}
.checkbox-field input[type="checkbox"]:checked{ background: var(--c-primary); }
.checkbox-field input[type="checkbox"]:checked::after{
  content: ""; position: absolute; left: 6px; top: 2px; width: 5px; height: 10px;
  border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg);
}
.checkbox-field label{ font-size: var(--fs-body-sm); color: var(--c-text-body); }
.form-success{ display: none; text-align: center; padding: 40px 20px; }
.form-success.is-visible{ display: block; }
.form-success .icon{
  width: 64px; height: 64px; border-radius: 50%; background: var(--c-success); color: #fff;
  display: flex; align-items: center; justify-content: center; margin: 0 auto 20px;
}
.form-card{ background: var(--c-surface); border-radius: var(--radius-lg); padding: 32px; }
@media (min-width: 768px){ .form-card{ padding: 48px; } }

/* ---------- 14. Filters / Tabs ---------- */
.filter-row{ display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 32px; }
.filter-chip{
  padding: 10px 18px; border-radius: 999px; background: var(--c-surface); color: var(--c-text-body);
  font-size: var(--fs-body-sm); font-weight: 500; transition: background var(--transition-base), color var(--transition-base);
}
.filter-chip.is-active, .filter-chip:hover{ background: var(--c-primary); color: #fff; }

/* ---------- 15. Modal / Lightbox ---------- */
.modal-overlay{
  position: fixed; inset: 0; background: rgba(45,46,47,0.75); z-index: 300;
  display: flex; align-items: center; justify-content: center; padding: 20px;
  opacity: 0; visibility: hidden; transition: opacity var(--transition-base), visibility var(--transition-base);
}
.modal-overlay.is-open{ opacity: 1; visibility: visible; }
.modal-box{ background: var(--c-base); border-radius: var(--radius-lg); position: relative; max-width: 560px; width: 100%; max-height: 90vh; overflow: auto; }
.modal-box.modal-lightbox{ max-width: 1100px; background: transparent; }
.modal-box.modal-video{ max-width: 960px; background: #000; aspect-ratio: 16/9; }
.modal-close{
  position: absolute; top: 12px; right: 12px; z-index: 5; width: 40px; height: 40px;
  border-radius: 50%; background: rgba(255,255,255,0.15); color: #fff;
  display: flex; align-items: center; justify-content: center;
}
.modal-lightbox .modal-close, .modal-lightbox .lb-nav{ background: rgba(255,255,255,0.15); }
.modal-lightbox img{ width: 100%; max-height: 82vh; object-fit: contain; border-radius: var(--radius-md); }
.lb-nav{
  position: absolute; top: 50%; transform: translateY(-50%); width: 48px; height: 48px; border-radius: 50%;
  color: #fff; display: flex; align-items: center; justify-content: center; z-index: 5;
}
.lb-prev{ left: -8px; } .lb-next{ right: -8px; }
@media (min-width: 768px){ .lb-prev{ left: -60px; } .lb-next{ right: -60px; } }
.lb-counter{ position: absolute; bottom: -36px; left: 50%; transform: translateX(-50%); color: #fff; font-size: var(--fs-body-sm); }

/* ---------- 16. Footer ---------- */
.site-footer{ background: var(--c-text-heading); color: rgba(255,255,255,0.7); padding-block: 56px 24px; }
.footer-top{ display: grid; gap: 40px; grid-template-columns: 1fr; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.12); }
@media (min-width: 768px){ .footer-top{ grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px){ .footer-top{ grid-template-columns: repeat(4, 1fr); } }
.footer-col h4{ color: #fff; font-size: var(--fs-body-sm); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 16px; }
.footer-col ul li{ margin-bottom: 10px; }
.footer-col a{ font-size: var(--fs-body-sm); transition: color var(--transition-base); }
.footer-col a:hover{ color: #fff; }
.footer-brand .logo-chip{
  display: inline-flex; align-items: center; background: #fff; border-radius: var(--radius-sm);
  padding: 8px 14px; margin-bottom: 16px;
}
.footer-brand .logo-chip img{ height: 26px; }
.social-links{ display: flex; gap: 10px; margin-top: 16px; }
.social-links a{
  width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.1);
  display: flex; align-items: center; justify-content: center;
}
.social-links a:hover{ background: var(--c-primary); }
.footer-bottom{ display: flex; flex-wrap: wrap; gap: 12px 24px; justify-content: space-between; padding-top: 24px; font-size: var(--fs-caption); }
.footer-bottom a:hover{ color: #fff; }

/* ---------- 17. Utility ---------- */
.sr-only{ position: absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }
.icon-btn{ display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; }
.line-clamp-3{ display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
/* [data-reveal] контент всегда виден по умолчанию — это осознанное решение:
   анимация появления при скролле не входит в обязательные компоненты ТЗ,
   а скрытие контента до срабатывания IntersectionObserver ненадёжно
   (не отрабатывает при статическом рендере/печати/некоторых браузерах).
   При желании включить лёгкую fade-up анимацию — см. main.js, блок Reveal. */
[data-reveal].is-visible{ transition: opacity .5s ease, transform .5s ease; }

/* 404 page */
.error-page{ min-height: 60vh; display: flex; align-items: center; justify-content: center; text-align: center; padding-block: 80px; }
.error-page .code{ font-size: 96px; font-weight: 700; color: var(--c-accent-light); line-height: 1; }