/* ИНТЕЛ Архитектура — Bilingual Minimal Architectural Website */

:root {
  --teal: #72A8AA;
  --teal-dark: #5A8A8C;
  --maroon: #592929;
  --maroon-soft: #6B3A3A;

  --bg: #F7F5F2;
  --bg-alt: #EFEBE6;
  --text: #2A1F1F;
  --text-muted: #6B5E5E;
  --border: #D9D2CB;
  --white: #FFFFFF;

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --container: 1200px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.lead {
  font-size: 1.25rem;
  line-height: 1.5;
  color: var(--text);
  margin-bottom: var(--space-md);
}

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

.section {
  padding: var(--space-xl) 0;
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border);
  padding-bottom: var(--space-sm);
}

.section-number {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--teal);
  letter-spacing: 0.05em;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 500;
  color: var(--maroon);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(247, 245, 242, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: var(--space-md);
}

.logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo-img {
  height: 48px;
  width: auto;
  background: transparent;
}

.nav {
  display: flex;
  gap: var(--space-md);
}

.nav a {
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.nav a:hover {
  color: var(--teal-dark);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Language switcher */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.lang-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 4px 2px;
  transition: color 0.2s ease;
}

.lang-btn:hover {
  color: var(--text);
}

.lang-btn.active {
  color: var(--maroon);
}

.lang-sep {
  color: var(--border);
  font-weight: 300;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--maroon);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle.open span:first-child {
  transform: translateY(3.75px) rotate(45deg);
}

.nav-toggle.open span:last-child {
  transform: translateY(-3.75px) rotate(-45deg);
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 72px;
  position: relative;
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
  flex: 1;
}

.hero-label {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal-dark);
  margin-bottom: var(--space-sm);
}

.hero-title {
  font-size: clamp(2.75rem, 7vw, 4.5rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-md);
  color: var(--maroon);
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.hero-graphic {
  position: relative;
  height: 60vh;
  max-height: 520px;
  border: 1px solid var(--border);
  background: var(--bg-alt);
  overflow: hidden;
}

.grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--border) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.7;
}

.hero-accent {
  position: absolute;
  top: 24px;
  left: 24px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--teal);
}

.hero-scroll {
  position: absolute;
  bottom: var(--space-md);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: var(--teal);
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.about-text p {
  margin-bottom: var(--space-sm);
  color: var(--text-muted);
}

.about-text .lead {
  color: var(--text);
}

.about-stats {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  border-left: 2px solid var(--teal);
  padding-left: var(--space-lg);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--maroon);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

/* Services */
.services {
  background: var(--bg-alt);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.service-card {
  background: var(--bg);
  padding: var(--space-md);
  transition: background 0.2s ease;
}

.service-card:hover {
  background: var(--white);
}

.service-num {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--teal);
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: var(--space-sm);
}

.service-card h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-xs);
  color: var(--maroon);
}

.service-card p {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Process */
.process-intro {
  max-width: 640px;
  margin-bottom: var(--space-lg);
  color: var(--text-muted);
  font-size: 1.0625rem;
}

.process-timeline {
  display: flex;
  flex-direction: column;
}

.process-step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-top: 1px solid var(--border);
}

.process-step:last-child {
  border-bottom: 1px solid var(--border);
}

.step-marker {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--teal);
  letter-spacing: 0.05em;
  padding-top: 4px;
}

.step-content h3 {
  font-size: 1.25rem;
  margin-bottom: 6px;
  color: var(--maroon);
}

.step-content p {
  color: var(--text-muted);
  font-size: 0.975rem;
  max-width: 560px;
}

/* Projects */
.projects-note {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
  font-style: italic;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.project-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.project-image {
  aspect-ratio: 4 / 3;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  overflow: hidden;
}

.placeholder-graphic {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image:
    linear-gradient(to right, var(--border) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border) 1px, transparent 1px);
  background-size: 32px 32px;
  position: relative;
}

.placeholder-graphic span {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 500;
  color: var(--teal);
  opacity: 0.45;
  letter-spacing: -0.02em;
}

.project-info h3 {
  font-size: 1.125rem;
  margin-bottom: 4px;
  color: var(--maroon);
}

.project-meta {
  font-size: 0.8125rem;
  color: var(--teal-dark);
  letter-spacing: 0.03em;
  margin-bottom: 8px;
}

.project-info p:last-child {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Contact */
.contact {
  background: var(--bg-alt);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-xl);
  align-items: center;
}

.contact-details {
  margin-top: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.detail {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: var(--space-sm);
  font-size: 0.9375rem;
}

.detail-label {
  color: var(--text-muted);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding-top: 2px;
}

.detail-value {
  color: var(--text);
}

.detail-value.link {
  color: var(--teal-dark);
  transition: color 0.2s ease;
}

.detail-value.link:hover {
  color: var(--maroon);
  text-decoration: underline;
}

.contact-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.contact-logo-wrap {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: var(--space-lg);
  max-width: 340px;
}

.contact-logo {
  width: 100%;
  height: auto;
  background: transparent;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: var(--space-lg) 0;
  background: var(--bg);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1.2fr;
  gap: var(--space-md);
  align-items: start;
}

.footer-logo {
  height: 42px;
  width: auto;
  margin-bottom: 12px;
  background: transparent;
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--teal-dark);
}

.footer-copy p {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.5;
  text-align: right;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .hero-graphic {
    height: 280px;
    order: -1;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .about-stats {
    border-left: none;
    border-top: 2px solid var(--teal);
    padding-left: 0;
    padding-top: var(--space-md);
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-md);
  }

  .services-grid {
    grid-template-columns: 1fr 1fr;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .contact-logo-wrap {
    max-width: 280px;
    margin: 0 auto;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .footer-copy p {
    text-align: left;
  }
}

@media (max-width: 640px) {
  :root {
    --space-lg: 3rem;
    --space-xl: 4rem;
  }

  .header-inner {
    height: 64px;
  }

  .logo-img {
    height: 40px;
  }

  .nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: var(--space-md);
    gap: var(--space-sm);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s ease, opacity 0.25s ease;
  }

  .nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-toggle {
    display: flex;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .process-step {
    grid-template-columns: 56px 1fr;
    gap: var(--space-sm);
  }

  .detail {
    grid-template-columns: 80px 1fr;
  }

  .hero-title {
    font-size: 2.5rem;
  }
}