/* ============================================
   HOMES ATHERTON - LUXURY REAL ESTATE
   Premium Design System 2026
   ============================================ */

/* CSS Variables - Design Tokens */
:root {
  /* Colors - Luxury Palette */
  --color-bg-primary: #0a0a0a;
  --color-bg-secondary: #111111;
  --color-bg-tertiary: #1a1a1a;
  --color-gold: #D4AF77;
  --color-gold-light: #E8C99A;
  --color-gold-dark: #B8966A;
  --color-text-primary: #F5F0E8;
  --color-text-secondary: #C9C4BC;
  --color-text-muted: #8A8580;
  --color-border: rgba(212, 175, 119, 0.15);
  --color-border-hover: rgba(212, 175, 119, 0.3);
  
  /* Typography */
  --font-serif: 'Playfair Display', 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-slower: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  
  /* Shadows */
  --shadow-gold: 0 0 40px rgba(212, 175, 119, 0.15);
  --shadow-dark: 0 20px 60px rgba(0, 0, 0, 0.5);
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-text-primary);
}

h1 {
  font-size: clamp(2.5rem, 6vw, var(--text-7xl));
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, var(--text-5xl));
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.5rem, 3vw, var(--text-3xl));
}

h4 {
  font-size: var(--text-xl);
}

p {
  color: var(--color-text-secondary);
  font-size: var(--text-base);
  line-height: 1.8;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Gold Accent Text */
.gold-text {
  color: var(--color-gold);
}

.gold-gradient {
  background: linear-gradient(135deg, var(--color-gold-light) 0%, var(--color-gold) 50%, var(--color-gold-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Elegant Divider */
.elegant-divider {
  width: 60px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
  margin: var(--space-8) auto;
}

.elegant-divider-left {
  margin-left: 0;
  margin-right: auto;
  background: linear-gradient(90deg, var(--color-gold), transparent);
}

/* Section Styling */
section {
  position: relative;
  padding: var(--space-24) var(--space-6);
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--space-16);
}

.section-label {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-gold);
  margin-bottom: var(--space-4);
}

.section-title {
  margin-bottom: var(--space-6);
}

.section-subtitle {
  color: var(--color-text-secondary);
  font-size: var(--text-lg);
  max-width: 600px;
  margin: 0 auto;
}

/* Container */
.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-narrow {
  max-width: 1000px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-6) var(--space-8);
  transition: all var(--transition-base);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(20px);
  padding: var(--space-4) var(--space-8);
  border-bottom: 1px solid var(--color-border);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1600px;
  margin: 0 auto;
}

.logo {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--color-text-primary);
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}

.logo-gold {
  color: var(--color-gold);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  position: relative;
  padding: var(--space-2) 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-gold);
  transition: width var(--transition-base);
}

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

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  padding: var(--space-3) var(--space-6);
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
  font-size: var(--text-sm);
  letter-spacing: 0.05em;
  transition: all var(--transition-base);
}

.nav-cta:hover {
  background: var(--color-gold);
  color: var(--color-bg-primary);
}

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 1px;
  background: var(--color-text-primary);
  transition: all var(--transition-base);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 0;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.6);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(10, 10, 10, 0.7) 0%,
    rgba(10, 10, 10, 0.3) 40%,
    rgba(10, 10, 10, 0.5) 70%,
    rgba(10, 10, 10, 0.9) 100%
  );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 1000px;
  padding: var(--space-8);
}

.hero-title {
  font-size: clamp(3rem, 10vw, 7rem);
  font-weight: 400;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-6);
  line-height: 1;
}

.hero-title .gold {
  color: var(--color-gold);
}

.hero-tagline {
  font-family: var(--font-sans);
  font-size: clamp(1rem, 2.5vw, 1.5rem);
  font-weight: 300;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-10);
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-10);
  background: transparent;
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  transition: all var(--transition-base);
  cursor: pointer;
}

.hero-cta:hover {
  background: var(--color-gold);
  color: var(--color-bg-primary);
  box-shadow: var(--shadow-gold);
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: var(--space-10);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  animation: bounce 2s infinite;
}

.scroll-indicator span {
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.scroll-indicator::after {
  content: '';
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-gold), transparent);
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-gold);
  color: var(--color-bg-primary);
}

.btn-primary:hover {
  background: var(--color-gold-light);
  box-shadow: var(--shadow-gold);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
}

.btn-outline:hover {
  background: var(--color-gold);
  color: var(--color-bg-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  padding: var(--space-3) 0;
  border-bottom: 1px solid transparent;
}

.btn-ghost:hover {
  color: var(--color-gold);
  border-bottom-color: var(--color-gold);
}

/* Cards */
.card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-dark);
}

.card-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

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

.card-content {
  padding: var(--space-6);
}

.card-title {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

.card-text {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.7;
}

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-8);
}

.feature-item {
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.feature-item:hover {
  border-color: var(--color-gold);
  background: var(--color-bg-secondary);
}

.feature-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-6);
  color: var(--color-gold);
}

.feature-title {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
}

.feature-text {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.7;
}

/* Image Gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.gallery-item {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-item:hover img {
  transform: scale(1.08);
}

.gallery-item-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 10, 10, 0.8), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
  display: flex;
  align-items: flex-end;
  padding: var(--space-6);
}

.gallery-item:hover .gallery-item-overlay {
  opacity: 1;
}

/* Two Column Layout */
.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.two-column-reverse {
  direction: rtl;
}

.two-column-reverse > * {
  direction: ltr;
}

.column-content {
  max-width: 540px;
}

.column-image {
  position: relative;
  overflow: hidden;
}

.column-image img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* Quote Block */
.quote-block {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-16) var(--space-8);
}

.quote-text {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-style: italic;
  line-height: 1.5;
  color: var(--color-text-primary);
  margin-bottom: var(--space-8);
}

.quote-text::before {
  content: '"';
  display: block;
  font-size: 4rem;
  color: var(--color-gold);
  line-height: 1;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

.quote-author {
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gold);
}

/* Forms */
.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-4) var(--space-5);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  font-size: var(--text-base);
  transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-gold);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23D4AF77' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
}

/* Accordion */
.accordion {
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-4);
}

.accordion-header {
  width: 100%;
  padding: var(--space-5) var(--space-6);
  background: var(--color-bg-secondary);
  border: none;
  color: var(--color-text-primary);
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-base);
}

.accordion-header:hover {
  background: var(--color-bg-tertiary);
}

.accordion-header::after {
  content: '+';
  font-size: var(--text-xl);
  color: var(--color-gold);
  transition: transform var(--transition-base);
}

.accordion.active .accordion-header::after {
  transform: rotate(45deg);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.accordion.active .accordion-body {
  max-height: 500px;
}

.accordion-content {
  padding: 0 var(--space-6) var(--space-6);
  color: var(--color-text-muted);
  font-size: var(--text-base);
  line-height: 1.8;
}

/* Journal/Article Cards */
.journal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-8);
}

.journal-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: all var(--transition-base);
}

.journal-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
}

.journal-card-image {
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.journal-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

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

.journal-card-content {
  padding: var(--space-6);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.journal-card-meta {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-3);
}

.journal-card-title {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
  line-height: 1.3;
}

.journal-card-excerpt {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.7;
  flex: 1;
}

.journal-card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-gold);
  transition: gap var(--transition-fast);
}

.journal-card:hover .journal-card-link {
  gap: var(--space-4);
}

/* Footer */
.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--space-20) var(--space-8) var(--space-10);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-12);
  max-width: 1400px;
  margin: 0 auto;
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  margin-bottom: var(--space-6);
}

.footer-tagline {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.footer-heading {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-primary);
  margin-bottom: var(--space-6);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-3);
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  max-width: 1400px;
  margin: var(--space-12) auto 0;
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copyright {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.footer-social {
  display: flex;
  gap: var(--space-4);
}

.footer-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

/* Acquisition Page Specific */
.acquisition-hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-24) var(--space-8);
}

.acquisition-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  margin-bottom: var(--space-6);
}

.acquisition-subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto var(--space-10);
}

.value-props {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-8);
  max-width: 1000px;
  margin: 0 auto var(--space-12);
}

.value-prop {
  text-align: center;
  padding: var(--space-8);
  border: 1px solid var(--color-border);
}

.value-prop-number {
  font-family: var(--font-serif);
  font-size: var(--text-5xl);
  color: var(--color-gold);
  margin-bottom: var(--space-4);
}

.value-prop-label {
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* Animations */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }

/* Reveal Animation */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 1024px) {
  .two-column {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }
  
  .two-column-reverse {
    direction: ltr;
  }
  
  .column-content {
    max-width: 100%;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg-primary);
    flex-direction: column;
    padding: var(--space-6);
    border-bottom: 1px solid var(--color-border);
    gap: var(--space-4);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  section {
    padding: var(--space-16) var(--space-4);
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
  }
  
  .journal-grid {
    grid-template-columns: 1fr;
  }
  
  .gallery-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-6);
    text-align: center;
  }
  
  .value-props {
    grid-template-columns: 1fr;
  }
}

/* Print Styles */
@media print {
  .navbar,
  .footer,
  .scroll-indicator {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
}