/* Okna-v-dom.pro — окна и остекление */
:root {
  --color-bg: #f4f6f8;
  --color-bg-alt: #e8edf1;
  --color-surface: #ffffff;
  --color-text: #2e3438;
  --color-text-muted: #5c656d;
  --color-accent: #2c4a5e;
  --color-accent-hover: #3a6078;
  --color-border: #cdd6de;
  --color-highlight: #6b9ab8;
  --font-sans: "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-display: Georgia, "Times New Roman", serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --radius: 8px;
  --shadow: 0 4px 24px rgba(44, 74, 94, 0.1);
  --header-h: 72px;
  --sticky-actions-h: 56px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

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

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

a:hover {
  color: var(--color-accent-hover);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-accent);
  margin-top: 0;
}

h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-bottom: var(--space-md); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 var(--space-sm); }

.container {
  width: min(1140px, 100% - 2rem);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(244, 246, 248, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-h);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-md);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
}

.logo img {
  width: 36px;
  height: 36px;
}

.nav-main {
  display: flex;
  gap: var(--space-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-main a {
  color: var(--color-text);
  font-size: 0.95rem;
}

.nav-main a:hover,
.nav-main a[aria-current="page"] {
  color: var(--color-accent);
}

.header-phone {
  font-weight: 600;
  white-space: nowrap;
  color: var(--color-accent);
}

.header-phone:hover {
  color: var(--color-accent-hover);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  color: var(--color-accent);
}

.menu-toggle svg {
  width: 28px;
  height: 28px;
}

@media (max-width: 900px) {
  .menu-toggle { display: block; }
  .nav-main {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-surface);
    padding: var(--space-md);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s, opacity 0.25s;
  }
  .nav-main.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .header-phone { display: none; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
  text-decoration: none;
}

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

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

.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn-outline:hover {
  background: var(--color-accent);
  color: #fff;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* Hero */
.hero {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(30, 50, 65, 0.88) 0%, rgba(30, 50, 65, 0.5) 60%);
}

.hero .container {
  position: relative;
  z-index: 1;
  padding-block: var(--space-xl);
}

.hero h1 {
  color: #fff;
  max-width: 14ch;
  margin-bottom: var(--space-md);
}

.hero-lead {
  font-size: 1.15rem;
  max-width: 42ch;
  margin-bottom: var(--space-lg);
  opacity: 0.95;
}

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

/* Sections */
.section {
  padding-block: var(--space-xl);
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.section-intro {
  text-align: center;
  max-width: 60ch;
  margin: -1rem auto var(--space-lg);
  color: var(--color-text-muted);
}

/* Benefits */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.benefit-card {
  text-align: center;
  padding: var(--space-lg);
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.benefit-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-md);
  color: var(--color-highlight);
}

.benefit-card h3 {
  margin-bottom: var(--space-xs);
}

.benefit-card p {
  color: var(--color-text-muted);
  margin: 0;
  font-size: 0.95rem;
}

@media (max-width: 768px) {
  .benefits-grid { grid-template-columns: 1fr; }
}

/* Categories */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.category-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4/5;
  text-decoration: none;
}

.category-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}

.category-card:hover img {
  transform: scale(1.05);
}

.category-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(transparent 40%, rgba(30, 50, 65, 0.82));
  display: flex;
  align-items: flex-end;
  padding: var(--space-md);
}

.category-overlay span {
  color: #fff;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
}

@media (max-width: 900px) {
  .categories-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Product cards */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-lg);
}

.product-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}

.product-card img {
  aspect-ratio: 4/3;
  object-fit: cover;
  width: 100%;
}

.product-body {
  padding: var(--space-md);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-body h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-xs);
}

.product-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  flex: 1;
}

.product-meta {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: var(--space-xs) 0;
}

.product-price {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-accent);
  margin: var(--space-sm) 0;
}

/* Reviews */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.review-card {
  background: var(--color-surface);
  padding: var(--space-lg);
  border-radius: var(--radius);
  border-left: 4px solid var(--color-highlight);
}

.review-text {
  font-style: italic;
  margin-bottom: var(--space-md);
}

.review-author {
  font-weight: 600;
  color: var(--color-accent);
}

.review-city {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

@media (max-width: 640px) {
  .reviews-grid { grid-template-columns: 1fr; }
}

/* FAQ */
.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-surface);
  border-radius: var(--radius);
  margin-bottom: var(--space-sm);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: var(--space-md);
  background: none;
  border: none;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-accent);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
}

.faq-question::after {
  content: "+";
  font-size: 1.25rem;
  flex-shrink: 0;
  transition: transform 0.2s;
}

.faq-item.is-open .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 var(--space-md) var(--space-md);
  color: var(--color-text-muted);
  display: none;
}

.faq-item.is-open .faq-answer {
  display: block;
}

/* Content pages */
.page-hero {
  padding-block: var(--space-xl) var(--space-lg);
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}

.page-hero h1 {
  margin-bottom: var(--space-xs);
}

.page-hero .breadcrumb {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.content-block {
  padding-block: var(--space-xl);
}

.content-block .prose {
  max-width: 72ch;
}

.content-block .prose ul,
.content-block .prose ol {
  margin: var(--space-sm) 0;
  padding-left: 1.5rem;
}

.content-block .prose li {
  margin-bottom: 0.5rem;
}

.info-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.info-card {
  background: var(--color-surface);
  padding: var(--space-lg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.info-card h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-sm);
}

@media (max-width: 768px) {
  .info-cards { grid-template-columns: 1fr; }
}

/* Contact form */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.contact-form {
  background: var(--color-surface);
  padding: var(--space-lg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 1rem;
  background: var(--color-bg);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
}

.form-success {
  display: none;
  padding: var(--space-md);
  background: #e8f0e6;
  border-radius: var(--radius);
  color: #2d4a28;
}

.contact-form.is-sent .form-fields { display: none; }
.contact-form.is-sent .form-success { display: block; }

.map-wrap {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  min-height: 360px;
}

.map-wrap iframe {
  width: 100%;
  height: 360px;
  border: 0;
}

.contact-details dl {
  margin: 0;
}

.contact-details dt {
  font-weight: 600;
  color: var(--color-accent);
  margin-top: var(--space-md);
}

.contact-details dd {
  margin: 0.25rem 0 0;
  color: var(--color-text-muted);
}

@media (max-width: 900px) {
  .contact-layout { grid-template-columns: 1fr; }
}

/* Footer */
.site-footer {
  background: var(--color-accent);
  color: rgba(255, 255, 255, 0.9);
  padding-block: var(--space-xl);
  margin-top: var(--space-xl);
}

.site-footer a {
  color: rgba(255, 255, 255, 0.85);
}

.site-footer a:hover {
  color: #fff;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-lg);
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: var(--space-sm);
}

.footer-brand p {
  font-size: 0.9rem;
  opacity: 0.85;
  margin: 0;
}

.footer-nav h4,
.footer-legal h4 {
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.footer-nav ul,
.footer-legal ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-nav li,
.footer-legal li {
  margin-bottom: 0.5rem;
}

.footer-bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 0.85rem;
  opacity: 0.8;
}

.footer-requisites {
  margin-top: var(--space-sm);
  line-height: 1.7;
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* Sticky mobile actions */
.sticky-actions {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-xs);
  gap: var(--space-xs);
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.08);
}

.sticky-actions a {
  flex: 1;
  text-align: center;
  padding: 0.75rem;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius);
  text-decoration: none;
}

.sticky-call {
  background: var(--color-accent);
  color: #fff !important;
}

.sticky-tg {
  background: #2aabee;
  color: #fff !important;
}

@media (max-width: 768px) {
  .sticky-actions { display: flex; }
  body { padding-bottom: calc(var(--sticky-actions-h) + var(--space-sm)); }
}

/* 404 */
.error-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-xl);
}

.error-page h1 {
  font-size: 4rem;
  margin-bottom: var(--space-sm);
}

/* CTA band */
.cta-band {
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-xl);
  text-align: center;
  border-radius: var(--radius);
  margin-block: var(--space-lg);
}

.cta-band h2 {
  color: #fff;
  margin-bottom: var(--space-sm);
}

.cta-band p {
  opacity: 0.9;
  margin-bottom: var(--space-md);
}

.cta-band .btn-primary {
  background: #fff;
  color: var(--color-accent);
}

.cta-band .btn-primary:hover {
  background: var(--color-bg);
}

/* Catalog filter hint */
.catalog-toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding: var(--space-md);
  background: var(--color-surface);
  border-radius: var(--radius);
}

.catalog-toolbar p {
  margin: 0;
  color: var(--color-text-muted);
}