/* ============================================
   4C Architecture Studio — Main Stylesheet
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600&family=Cormorant+Garamond:ital,wght@0,300;0,400;1,300&display=swap');

:root {
  --black:   #111111;
  --white:   #ffffff;
  --coral:   #E07B65;
  --grey-light: #f5f5f3;
  --grey-mid:   #999999;
  --grey-dark:  #444444;
  --font-sans:  'Montserrat', sans-serif;
  --font-serif: 'Cormorant Garamond', serif;
  --nav-h: 72px;
  --transition: 0.3s ease;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  color: var(--black);
  background: var(--white);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { display: block; width: 100%; height: 100%; object-fit: cover; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  background: var(--white);
  border-bottom: 1px solid #e8e8e8;
  transition: box-shadow var(--transition);
}
.nav.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.08); }

.nav-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.nav-logo svg { width: auto; height: 36px; flex-shrink: 0; }
.nav-logo-text strong { font-weight: 600; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 40px;
}
.nav-links a {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--grey-dark);
  transition: color var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--black); }

.nav-cta {
  background: var(--black);
  color: var(--white) !important;
  padding: 10px 22px;
  font-size: 11px !important;
  font-weight: 600 !important;
  letter-spacing: 0.14em;
  transition: background var(--transition) !important;
}
.nav-cta:hover { background: var(--coral) !important; color: var(--white) !important; }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.nav-hamburger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--black);
  transition: var(--transition);
}

/* Mobile nav */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: var(--white);
  padding: 32px 48px 40px;
  border-top: 1px solid #e8e8e8;
  z-index: 99;
  flex-direction: column;
  gap: 24px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--grey-dark);
  transition: color var(--transition);
}
.mobile-menu a:hover { color: var(--black); }
.mobile-menu .nav-cta {
  align-self: flex-start;
  padding: 12px 28px;
}

/* ============================================
   HERO
   ============================================ */
.hero {
  height: 100vh;
  min-height: 600px;
  position: relative;
  display: flex;
  align-items: flex-end;
  padding: 0 48px 80px;
  margin-top: var(--nav-h);
  overflow: hidden;
  background: var(--grey-light);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--grey-light);
}
.hero-bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.85;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.55) 0%, rgba(0,0,0,0.1) 50%, transparent 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  color: var(--white);
  max-width: 680px;
}
.hero-eyebrow {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--coral);
  margin-bottom: 20px;
}
.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(42px, 6vw, 80px);
  font-weight: 300;
  line-height: 1.08;
  margin-bottom: 28px;
}
.hero-title em { font-style: italic; color: rgba(255,255,255,0.75); }
.hero-subtitle {
  font-size: 14px;
  font-weight: 300;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.8);
  max-width: 460px;
  margin-bottom: 40px;
  line-height: 1.7;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}
.btn-primary {
  background: var(--coral);
  color: var(--white);
}
.btn-primary:hover { background: #c96a54; }
.btn-outline {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255,255,255,0.6);
}
.btn-outline:hover { border-color: var(--white); background: rgba(255,255,255,0.1); }
.btn-dark {
  background: var(--black);
  color: var(--white);
}
.btn-dark:hover { background: #333; }

.hero-scroll {
  position: absolute;
  bottom: 40px;
  right: 48px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: rgba(255,255,255,0.6);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
}
.hero-scroll::after {
  content: '';
  display: block;
  width: 1px;
  height: 60px;
  background: rgba(255,255,255,0.4);
}

/* ============================================
   SECTIONS
   ============================================ */
section { padding: 100px 48px; }
.section-eyebrow {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--coral);
  margin-bottom: 16px;
}
.section-title {
  font-family: var(--font-serif);
  font-size: clamp(32px, 4vw, 54px);
  font-weight: 300;
  line-height: 1.15;
  margin-bottom: 24px;
}
.section-title em { font-style: italic; }
.section-body {
  font-size: 15px;
  line-height: 1.8;
  color: var(--grey-dark);
  max-width: 540px;
}

/* ============================================
   STATS BAR
   ============================================ */
.stats {
  background: var(--black);
  color: var(--white);
  padding: 56px 48px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
}
.stat-number {
  font-family: var(--font-serif);
  font-size: 52px;
  font-weight: 300;
  line-height: 1;
  margin-bottom: 8px;
}
.stat-number span { color: var(--coral); }
.stat-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
}

/* ============================================
   PROJECTS GRID
   ============================================ */
.projects-section { padding: 100px 48px; }
.projects-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 60px;
}
.projects-header .section-body { margin-bottom: 0; }

.projects-filter {
  display: flex;
  gap: 8px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}
.filter-btn {
  padding: 8px 20px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1.5px solid #ddd;
  background: transparent;
  cursor: pointer;
  transition: all var(--transition);
  color: var(--grey-dark);
}
.filter-btn:hover, .filter-btn.active {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}
.project-card {
  display: block;
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  cursor: pointer;
  background: var(--grey-light);
  text-decoration: none;
  color: inherit;
}
.project-card.featured {
  grid-column: span 2;
  aspect-ratio: 16/9;
}
.project-card img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.project-card:hover img { transform: scale(1.04); }
.project-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
  display: flex;
  align-items: flex-end;
  padding: 28px;
  color: var(--white);
}
.project-card:hover .project-card-overlay { opacity: 1; }
.project-card-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 300;
  margin-bottom: 4px;
}
.project-card-type {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--coral);
}

/* Placeholder for missing images */
.project-card-placeholder {
  width: 100%; height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--grey-light);
  color: var(--grey-mid);
  gap: 8px;
}
.project-card-placeholder svg { opacity: 0.3; }
.project-card-placeholder span { font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; }

/* ============================================
   REVIEWS
   ============================================ */
.reviews { background: var(--grey-light); }
.reviews-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.reviews-header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  margin-bottom: 64px;
}
.stars { display: flex; gap: 4px; margin-bottom: 16px; }
.star { width: 18px; height: 18px; fill: #F5C842; }
.reviews-score {
  font-family: var(--font-serif);
  font-size: 80px;
  font-weight: 300;
  line-height: 1;
  margin-bottom: 4px;
}
.reviews-count {
  font-size: 12px;
  color: var(--grey-mid);
  letter-spacing: 0.08em;
}
.reviews-claim {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 300;
  line-height: 1.4;
  font-style: italic;
  color: var(--grey-dark);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.review-card {
  background: var(--white);
  padding: 32px;
}
.review-card .stars { margin-bottom: 16px; }
.review-text {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 300;
  font-style: italic;
  line-height: 1.65;
  color: var(--grey-dark);
  margin-bottom: 20px;
}
.review-author {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.review-location { font-size: 11px; color: var(--grey-mid); margin-top: 2px; }

/* ============================================
   SERVICES
   ============================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  margin-top: 60px;
}
.service-card {
  padding: 52px 48px;
  background: var(--grey-light);
  transition: background var(--transition);
}
.service-card:hover { background: #eeede9; }
.service-number {
  font-family: var(--font-serif);
  font-size: 48px;
  font-weight: 300;
  color: var(--coral);
  opacity: 0.4;
  margin-bottom: 16px;
  line-height: 1;
}
.service-title {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 300;
  margin-bottom: 16px;
}
.service-body {
  font-size: 14px;
  line-height: 1.75;
  color: var(--grey-dark);
}

/* ============================================
   ABOUT / INTRO SPLIT
   ============================================ */
.about-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.about-image {
  aspect-ratio: 3/4;
  overflow: hidden;
  background: var(--grey-light);
}
.about-image img { width: 100%; height: 100%; object-fit: cover; }

/* ============================================
   CTA BAND
   ============================================ */
.cta-band {
  background: var(--black);
  color: var(--white);
  text-align: center;
  padding: 100px 48px;
}
.cta-band .section-title { color: var(--white); margin-bottom: 16px; }
.cta-band .section-body { color: rgba(255,255,255,0.6); margin: 0 auto 40px; text-align: center; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ============================================
   CONTACT
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.contact-info { }
.contact-detail {
  margin-bottom: 32px;
}
.contact-detail-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--coral);
  margin-bottom: 6px;
}
.contact-detail p { font-size: 15px; line-height: 1.7; color: var(--grey-dark); }
.contact-detail a { color: var(--grey-dark); transition: color var(--transition); }
.contact-detail a:hover { color: var(--black); }

.contact-form { }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 8px;
  color: var(--grey-dark);
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  font-family: var(--font-sans);
  font-size: 14px;
  border: 1.5px solid #ddd;
  background: var(--white);
  color: var(--black);
  outline: none;
  transition: border-color var(--transition);
  appearance: none;
  border-radius: 0;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--black); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ============================================
   FOOTER
   ============================================ */
footer {
  background: var(--black);
  color: var(--white);
  padding: 64px 48px 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 60px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
  font-size: 12px;
  font-weight: 300;
  letter-spacing: 0.1em;
}
.footer-logo svg { width: auto; height: 32px; }
.footer-tagline { font-size: 13px; color: rgba(255,255,255,0.45); line-height: 1.7; max-width: 260px; }
.footer-col-title {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin-bottom: 20px;
}
.footer-col a {
  display: block;
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  margin-bottom: 10px;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--white); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  color: rgba(255,255,255,0.35);
}
.footer-bottom a { color: rgba(255,255,255,0.35); transition: color var(--transition); }
.footer-bottom a:hover { color: rgba(255,255,255,0.7); }

/* ============================================
   PAGE HEADER (inner pages)
   ============================================ */
.page-header {
  padding: 120px 48px 80px;
  background: var(--grey-light);
  margin-top: var(--nav-h);
}
.page-header .section-eyebrow { margin-bottom: 12px; }
.page-header h1 {
  font-family: var(--font-serif);
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 300;
  line-height: 1.1;
}
.page-header h1 em { font-style: italic; }

/* ============================================
   PROJECT DETAIL
   ============================================ */
.project-hero {
  height: 70vh;
  min-height: 480px;
  overflow: hidden;
  background: var(--grey-light);
  margin-top: var(--nav-h);
}
.project-hero img { width: 100%; height: 100%; object-fit: cover; }

.project-intro {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 80px;
  padding: 80px 48px;
}
.project-meta-list { }
.project-meta-item { margin-bottom: 28px; }
.project-meta-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--coral);
  margin-bottom: 4px;
}
.project-meta-value { font-size: 15px; color: var(--grey-dark); }
.project-description {
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: 300;
  line-height: 1.65;
  color: var(--grey-dark);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .project-card.featured { grid-column: span 2; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --nav-h: 60px; }
  section { padding: 64px 24px; }
  .nav { padding: 0 24px; }
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .mobile-menu { padding: 24px; }

  .hero { padding: 0 24px 56px; }
  .hero-scroll { display: none; }

  .stats { grid-template-columns: repeat(2, 1fr); padding: 48px 24px; gap: 32px; }
  .stat-number { font-size: 40px; }

  .projects-section { padding: 64px 24px; }
  .projects-header { flex-direction: column; align-items: flex-start; gap: 24px; }
  .projects-grid { grid-template-columns: 1fr; gap: 2px; }
  .project-card.featured { grid-column: span 1; aspect-ratio: 4/3; }
  .project-card-overlay { opacity: 1; }

  .reviews-header { grid-template-columns: 1fr; gap: 32px; }
  .reviews-grid { grid-template-columns: 1fr; }
  .reviews-score { font-size: 60px; }

  .services-grid { grid-template-columns: 1fr; }
  .about-split { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }

  .page-header { padding: 100px 24px 56px; }
  .project-intro { grid-template-columns: 1fr; gap: 40px; padding: 48px 24px; }
  .cta-band { padding: 64px 24px; }
}