/* ==========================================================================
   VERTEX — СТИЛИ СЕКЦИЙ И РАСКЛАДОК (sections.css)
   Ритм секций, архитектурный CAD-блок, спецификация и подвал
   ========================================================================== */

/* 1. ОБЩИЙ РИТМ СЕКЦИЙ */
.section {
  padding-block: clamp(4.5rem, 8vw, 8rem);
  border-bottom: 1px solid var(--line);
}

.section--alt {
  background-color: var(--paper-2);
}

.section-header {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-num {
  display: inline-block;
  font-size: var(--text-label);
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--oak);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: var(--text-h2);
  font-weight: 500;
  line-height: 1.12;
  color: var(--ink);
}

.section-title em {
  font-style: italic;
  color: var(--oak);
}

.section-desc {
  margin-top: 14px;
  font-size: var(--text-base);
  color: var(--muted);
  max-width: 640px;
}

/* 2. HERO СЕКЦИЯ */
.hero {
  position: relative;
  background-color: var(--forest);
  color: var(--paper);
  padding-block: clamp(4rem, 8vw, 8rem);
  overflow: hidden;
}

.hero::before,
.section--dark::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.05'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 1;
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: center;
}

@media (min-width: 960px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
  }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-label);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--oak-light);
  margin-bottom: 1.5rem;
}

.eyebrow::before {
  content: '';
  width: 24px;
  height: 1px;
  background-color: var(--oak-light);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: var(--text-hero);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin-bottom: 1.5rem;
  color: #FFFFFF;
}

.hero-title em {
  font-style: italic;
  font-weight: 500;
  color: var(--oak-light);
}

.hero-desc {
  font-size: clamp(1rem, 1.2vw + 0.3rem, 1.25rem);
  line-height: 1.6;
  color: var(--sage);
  max-width: 580px;
  margin-bottom: 2.25rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.hero-visual {
  position: relative;
  background-color: var(--forest-card);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-md);
  padding: 12px;
  box-shadow: var(--shadow-lg);
}

.hero-cad-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background-color: #141A16;
}

.hero-cad-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.hero-visual-caption {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 10px;
  font-size: var(--text-label);
  color: var(--sage);
  letter-spacing: 0.04em;
}

/* 3. ПОЛОСА ФАКТОВ */
.facts-strip {
  background-color: var(--paper-2);
  border-bottom: 1px solid var(--line);
  padding-block: 28px;
}

.facts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

@media (min-width: 960px) {
  .facts-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
  }
}

.fact-item {
  position: relative;
  padding-left: 18px;
  border-left: 2px solid var(--oak);
}

.fact-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 4px;
}

.fact-sub {
  font-size: var(--text-xs);
  color: var(--muted);
  line-height: 1.4;
}

/* 4. ФЛАГМАНСКИЙ ПРОДУКТ */
.product-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 4vw, 4rem);
  align-items: center;
}

@media (min-width: 960px) {
  .product-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.product-cad-box {
  background-color: var(--forest);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-md);
}

.product-badge-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 1.25rem;
}

.product-main-size {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 4vw, 3.75rem);
  font-weight: 600;
  color: var(--ink);
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.product-facts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-block: 2rem;
  border-block: 1px solid var(--line);
  padding-block: 1.5rem;
}

.product-fact-cell {
  display: flex;
  flex-direction: column;
}

.fact-cell-label {
  font-size: var(--text-xs);
  color: var(--muted);
  margin-bottom: 4px;
}

.fact-cell-val {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--ink);
}

.product-text {
  font-size: var(--text-base);
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 2rem;
}

/* 6. СПЕЦИФИКАЦИЯ */
.specs-card {
  background-color: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
}

.specs-table tr {
  border-bottom: 1px solid var(--line);
}

.specs-table tr:last-child {
  border-bottom: none;
}

.specs-table th {
  padding: 18px 24px;
  text-align: left;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--muted);
  width: 40%;
  background-color: var(--paper);
}

.specs-table td {
  padding: 18px 24px;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--ink);
}

.specs-footnote {
  margin-top: 18px;
  font-size: var(--text-xs);
  color: var(--muted);
  font-style: italic;
}

/* ПАРТНЁРЫ (ТЁМНАЯ СЕКЦИЯ С ЗЕРНОМ) */
.section--dark {
  position: relative;
  background-color: var(--forest);
  color: var(--paper);
  border-bottom-color: var(--line-dark);
}

.section--dark > .container {
  position: relative;
  z-index: 2;
}

.section--dark .section-num,
.section--dark .section-title em {
  color: var(--oak-light);
}

.section--dark .section-title {
  color: var(--paper);
}

.section--dark .section-desc {
  color: var(--sage);
}

.partners-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 768px) {
  .partners-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

.partner-card {
  display: flex;
  flex-direction: column;
  background-color: var(--forest-card);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--duration-normal) var(--ease-out), transform var(--duration-normal) var(--ease-out);
}

.partner-card:hover {
  border-color: var(--oak-light);
  transform: translateY(-3px);
}

/* Текстовый логотип партнёра в стиле чертежа */
.partner-logo {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  aspect-ratio: 16 / 7;
  padding: 24px;
  background: radial-gradient(ellipse at center, rgb(212 176 126 / 0.1), transparent 70%);
  border-bottom: 1px solid var(--line-dark);
}

.partner-logo::before {
  content: '';
  position: absolute;
  inset: 14px;
  border: 1px solid rgb(212 176 126 / 0.22);
  pointer-events: none;
}

.partner-logo-kicker {
  font-size: var(--text-label);
  font-weight: 700;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--oak-light);
}

.partner-logo-name {
  font-family: var(--font-serif);
  font-size: clamp(1.625rem, 2.4vw + 1rem, 3.25rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-align: center;
  color: var(--paper);
}

.partner-logo-rule {
  width: 56px;
  height: 1px;
  background-color: var(--oak-light);
  opacity: 0.6;
}

.partner-body {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 28px 28px;
}

.partner-kind {
  font-size: var(--text-label);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--oak-light);
}

.partner-name {
  font-family: var(--font-serif);
  font-size: var(--text-h3);
  font-weight: 600;
  line-height: 1.2;
  color: var(--paper);
}

.partner-text {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--sage);
}

.partner-link {
  margin-top: auto;
  padding-top: 8px;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--oak-light);
  transition: color var(--duration-fast);
}

.partner-link:hover {
  color: var(--oak-hover);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* 7. ЗАПРОС И КОНТАКТНАЯ ИНФОРМАЦИЯ */
.request-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 4vw, 4rem);
}

@media (min-width: 960px) {
  .request-grid {
    grid-template-columns: 1.15fr 0.85fr;
  }
}

.request-card {
  background-color: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  box-shadow: var(--shadow-sm);
}

.request-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.info-banner {
  background-color: var(--paper-2);
  border-left: 3px solid var(--oak);
  padding: 20px 24px;
  border-radius: var(--radius-sm);
}

.info-banner-title {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--oak);
  margin-bottom: 8px;
}

.info-banner-text {
  font-size: var(--text-sm);
  color: var(--muted);
  line-height: 1.55;
}

.contact-phone {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 2vw + 0.75rem, 2.5rem);
  font-weight: 600;
  line-height: 1.1;
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 6px;
  transition: color var(--duration-fast), text-decoration-color var(--duration-fast);
}

.contact-phone:hover {
  color: var(--oak);
  text-decoration-color: currentColor;
}

.preview-box {
  background-color: #FFFFFF;
  border: 1px solid var(--line);
  padding: 20px 24px;
  border-radius: var(--radius-sm);
}

.preview-title {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 12px;
}

.preview-text {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  color: var(--ink);
  line-height: 1.6;
  background-color: var(--paper);
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  white-space: pre-line;
}

/* 8. ФУТЕР */
.footer {
  position: relative;
  background-color: var(--forest);
  color: var(--paper);
  padding-top: 64px;
  padding-bottom: 104px; /* место под плавающую кнопку WhatsApp */
  border-top: 1px solid var(--line-dark);
}

.footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
}

.footer-top {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--line-dark);
}

@media (min-width: 768px) {
  .footer-top {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}

.footer-brand-desc {
  margin-top: 8px;
  font-size: var(--text-sm);
  color: var(--sage);
  max-width: 380px;
}

.footer-contact {
  display: inline-block;
  margin-top: 16px;
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--oak-light);
  transition: color var(--duration-fast);
}

.footer-contact:hover {
  color: var(--oak-hover);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

@media (min-width: 640px) {
  .footer-nav {
    flex-direction: row;
    gap: 28px;
  }
}

.footer-nav-link {
  font-size: var(--text-sm);
  color: var(--sage);
  transition: color var(--duration-fast);
}

.footer-nav-link:hover {
  color: var(--oak-light);
}

.footer-bottom {
  position: relative;
  z-index: 2;
  padding-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  font-size: var(--text-xs);
  color: var(--sage);
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-top-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--oak-light);
  font-weight: 600;
}