/* ==========================================================================
   STRATA ARCHITECTURAL DESIGN STUDIO — STYLESHEET
   Design System Tokens & Visual Archetype: Swiss Architectural Editorial
   Color Discipline: 60% Warm Travertine (#F9F8F6), 30% Pure Chalk (#FFFFFF), 10% Burnt Terracotta (#C86D51)
   ========================================================================== */

:root {
  /* Color Palette Architecture (Strict 60-30-10 Rule) */
  --bg-base: #F9F8F6;
  --surface-card: #FFFFFF;
  --surface-border: rgba(28, 26, 23, 0.12);
  --surface-border-hover: rgba(200, 109, 81, 0.45);
  
  --text-primary: #1C1A17;
  --text-secondary: #4A4640;
  --text-muted: #6E6961;
  
  --accent-primary: #C86D51;
  --accent-hover: #B05B41;
  --accent-light: rgba(200, 109, 81, 0.08);
  
  /* Typography Scale */
  --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', SFMono-Regular, Consolas, monospace;
  
  /* Baseline Spacing Scale (8px rhythm) */
  --space-8: 8px;
  --space-16: 16px;
  --space-24: 24px;
  --space-32: 32px;
  --space-48: 48px;
  --space-64: 64px;
  --space-96: 96px;
  
  /* Radii Discipline: Sharp 0px-4px geometry; 9999px reserved exclusively for pill tags */
  --radius-card: 4px;
  --radius-img: 4px;
  --radius-pill: 9999px;
  
  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Global Baseline */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-base);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-secondary);
  line-height: 1.7;
  overflow-x: hidden;
  padding-top: 56px;
}

/* Typography Hierarchy */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.4rem, 5.2vw, 4.2rem);
  margin-bottom: var(--space-24);
}

h2 {
  font-size: clamp(1.8rem, 3.8vw, 3rem);
  margin-bottom: var(--space-16);
}

h3 {
  font-size: clamp(1.25rem, 2.2vw, 1.75rem);
  margin-bottom: var(--space-16);
}

p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: var(--space-16);
}

.mono-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent-primary);
  font-weight: 600;
}

.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  background: var(--accent-light);
  border: 1px solid rgba(200, 109, 81, 0.25);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Container & Layout Utilities */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding-left: var(--space-24);
  padding-right: var(--space-24);
}

section {
  padding-top: var(--space-96);
  padding-bottom: var(--space-96);
  border-bottom: 1px solid var(--surface-border);
}

.section-header {
  margin-bottom: var(--space-64);
  max-width: 720px;
}

.section-header .mono-tag {
  display: block;
  margin-bottom: var(--space-16);
}

/* 1. Floating Navigation Header */
header.site-header {
  position: fixed;
  top: calc(var(--space-24) + 56px);
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 48px);
  max-width: 1240px;
  z-index: 100;
}

nav.navbar {
  background: rgba(249, 248, 246, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-pill);
  padding: 12px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 4px 20px rgba(28, 26, 23, 0.04);
}

.nav-brand {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.nav-brand span {
  color: var(--accent-primary);
}

.nav-links {
  display: flex;
  gap: var(--space-32);
  align-items: center;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--accent-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-16);
}

.lang-switch {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.lang-switch .active {
  color: var(--text-primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* Button System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-card);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 1px solid transparent;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--surface-border);
}

.btn-outline:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: var(--accent-light);
}

/* 2. Hero Section */
.hero-section {
  padding-top: calc(var(--space-96) + 60px);
  padding-bottom: var(--space-96);
  min-height: 90vh;
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-64);
  align-items: center;
}

.hero-content h1 span {
  font-style: italic;
  font-family: var(--font-serif);
  color: var(--accent-primary);
  font-weight: 400;
}

.hero-sub {
  font-size: 1.18rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-48);
  max-width: 540px;
}

.hero-trust-bar {
  margin-top: var(--space-48);
  padding-top: var(--space-24);
  border-top: 1px solid var(--surface-border);
  display: flex;
  gap: var(--space-32);
}

.trust-item {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.trust-item strong {
  display: block;
  color: var(--text-primary);
  font-size: 1.1rem;
  font-family: var(--font-sans);
  font-weight: 700;
  margin-bottom: 2px;
}

.hero-visual-card {
  position: relative;
  background: var(--surface-card);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(28, 26, 23, 0.06);
}

.hero-visual-card img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  display: block;
}

.card-meta-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(28, 26, 23, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 20px 24px;
  color: #FFFFFF;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.card-meta-overlay .meta-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: #FFFFFF;
}

.card-meta-overlay .meta-details {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.75);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* 3. Featured Architectural Showcase (21st.dev Style Layout) */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-32);
}

.showcase-card {
  background: var(--surface-card);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.showcase-card:hover {
  border-color: var(--surface-border-hover);
  box-shadow: 0 12px 30px rgba(28, 26, 23, 0.08);
}

.showcase-card.card-large {
  grid-column: span 7;
}

.showcase-card.card-medium {
  grid-column: span 5;
}

.showcase-card.card-full {
  grid-column: span 12;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
}

.img-container {
  overflow: hidden;
  position: relative;
}

.img-container img {
  width: 100%;
  height: 340px;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-smooth);
}

.showcase-card.card-full .img-container img {
  height: 400px;
}

.showcase-card:hover .img-container img {
  transform: scale(1.04);
}

.card-content {
  padding: var(--space-32);
}

.card-content .mono-tag {
  margin-bottom: var(--space-8);
  display: block;
}

.card-content h3 {
  margin-bottom: var(--space-8);
}

.card-specs {
  display: flex;
  gap: var(--space-24);
  margin-top: var(--space-16);
  padding-top: var(--space-16);
  border-top: 1px solid var(--surface-border);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* 4. Core Capabilities & Services */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-32);
}

.service-card {
  background: var(--surface-card);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-card);
  padding: var(--space-48) var(--space-32);
  transition: all var(--transition-fast);
}

.service-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.service-num {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--accent-primary);
  font-weight: 700;
  margin-bottom: var(--space-24);
  display: block;
}

.service-card h3 {
  font-size: 1.4rem;
  margin-bottom: var(--space-16);
}

.service-deliverables {
  list-style: none;
  margin-top: var(--space-24);
  padding-top: var(--space-24);
  border-top: 1px solid var(--surface-border);
}

.service-deliverables li {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: var(--space-8);
  display: flex;
  align-items: center;
  gap: 8px;
}

.service-deliverables li::before {
  content: "—";
  color: var(--accent-primary);
}

/* 5. Execution Timeline */
.timeline-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-32);
  position: relative;
}

.timeline-card {
  background: var(--surface-card);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-card);
  padding: var(--space-48) var(--space-32);
}

.timeline-step {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-16);
  display: block;
}

/* 6. Trust & Freedom Guarantees */
.guarantees-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-24);
}

.guarantee-card {
  background: var(--surface-card);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-card);
  padding: var(--space-32) var(--space-24);
}

.guarantee-card h4 {
  font-size: 1.15rem;
  margin-bottom: var(--space-12);
}

/* 7. Contact Section & Form */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--space-64);
  align-items: start;
}

.form-wrapper {
  background: var(--surface-card);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-card);
  padding: var(--space-48);
  box-shadow: 0 12px 30px rgba(28, 26, 23, 0.04);
}

.form-group {
  margin-bottom: var(--space-24);
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  padding: 14px 18px;
  background: var(--bg-base);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-card);
  font-family: var(--font-sans);
  font-size: 0.98rem;
  color: var(--text-primary);
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-primary);
  background: #FFFFFF;
}

textarea.form-control {
  min-height: 130px;
  resize: vertical;
}

.honeypot-field {
  display: none !important;
  visibility: hidden;
}

.form-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: var(--space-24);
  padding: 12px 16px;
  background: var(--accent-light);
  border: 1px solid rgba(200, 109, 81, 0.2);
  border-radius: var(--radius-card);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* 8. Footer */
footer.site-footer {
  padding-top: var(--space-64);
  padding-bottom: var(--space-48);
  background: var(--text-primary);
  color: rgba(255, 255, 255, 0.7);
  border-top: none;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: var(--space-48);
  margin-bottom: var(--space-64);
}

.footer-brand .nav-brand {
  color: #FFFFFF;
  font-size: 1.1rem;
  margin-bottom: var(--space-16);
  display: block;
}

.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #FFFFFF;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-24);
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: var(--space-12);
}

.footer-col ul a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-col ul a:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  padding-top: var(--space-32);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
}

/* 9. Mobile Sticky Action Bar */
.mobile-sticky-bar {
  display: none;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .hero-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .showcase-card.card-large,
  .showcase-card.card-medium,
  .showcase-card.card-full {
    grid-column: span 12;
  }

  .showcase-card.card-full {
    grid-template-columns: 1fr;
  }

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

  .guarantees-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  body {
    padding-bottom: 65px;
  }

  header.site-header {
    width: calc(100% - 32px);
    top: calc(var(--space-16) + 56px);
  }

  nav.navbar {
    padding: 10px 18px;
  }

  .nav-links {
    display: none;
  }

  .hero-trust-bar {
    flex-direction: column;
    gap: var(--space-16);
  }

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

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

  /* Mobile Sticky Bottom Bar */
  .mobile-sticky-bar {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 65px;
    background: var(--surface-card);
    border-top: 1px solid var(--surface-border);
    z-index: 1000;
    box-shadow: 0 -4px 20px rgba(28, 26, 23, 0.08);
  }

  .mobile-sticky-bar a {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
  }

  .mobile-sticky-bar .bar-call {
    color: var(--text-primary);
    border-right: 1px solid var(--surface-border);
  }

  .mobile-sticky-bar .bar-book {
    background: var(--accent-primary);
    color: #FFFFFF;
  }
}