/* ============================================
   WHITEHOUSE GROUP ESTATE - DESIGN SYSTEM
   ============================================ */

/* === CSS VARIABLES === */
:root {
  /* Colors - "White Precious Stone" Theme */
  --color-primary: #FFFFFF;
  --color-secondary: #F8F9FA;
  --color-accent: #D4AF37; /* Gold */
  --color-platinum: #E5E4E2; /* Platinum gray */
  --color-dark: #1A1A2E;
  --color-dark-blue: #16213E;
  --color-text: #2D3748;
  --color-text-light: #718096;
  --color-border: #E2E8F0;
  --color-success: #48BB78;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Outfit', 'Inter', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

/* === RESET & BASE === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-primary);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-primary);
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-dark);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
  font-size: 1.5rem;
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1.125rem;
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.text-light {
  color: var(--color-text-light);
}

.text-accent {
  color: var(--color-accent);
}

/* === LAYOUT === */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-wide {
  max-width: 1400px;
}

.container-narrow {
  max-width: 900px;
}

.section {
  padding: var(--spacing-3xl) 0;
}

.section-sm {
  padding: var(--spacing-2xl) 0;
}

.section-lg {
  padding: 5rem 0;
}

/* === HEADER & NAVIGATION === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: transform var(--transition-normal);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-dark);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

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

.nav-menu {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-link {
  color: var(--color-text);
  font-weight: 500;
  position: relative;
  padding: var(--spacing-xs) 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

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

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.hamburger {
  width: 24px;
  height: 2px;
  background: var(--color-dark);
  position: relative;
  transition: background var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background: var(--color-dark);
  transition: transform var(--transition-fast);
}

.hamburger::before {
  top: -8px;
}

.hamburger::after {
  bottom: -8px;
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.875rem 1.75rem;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
  font-family: var(--font-primary);
}

.btn-primary {
  background: var(--color-dark);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: var(--color-dark-blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: transparent;
  color: var(--color-dark);
  border: 2px solid var(--color-dark);
}

.btn-secondary:hover {
  background: var(--color-dark);
  color: white;
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-dark);
  box-shadow: var(--shadow-md);
}

.btn-accent:hover {
  background: #C5A028;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-lg {
  padding: 1.125rem 2rem;
  font-size: 1.125rem;
}

.btn-sm {
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
}

/* === HERO SECTION === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, #F8F9FA 0%, #FFFFFF 100%);
  padding: var(--spacing-3xl) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-30px); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  padding-top: 80px;
}

.hero-headline {
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 1s ease-out;
}

.hero-subheadline {
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xl);
  line-height: 1.7;
  animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 1s ease-out 0.4s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* === TRUST STRIP === */
.trust-strip {
  background: var(--color-dark);
  color: white;
  padding: var(--spacing-md) 0;
}

.trust-items {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.9375rem;
  font-weight: 500;
}

.trust-item::before {
  content: '✓';
  color: var(--color-accent);
  font-weight: 700;
  font-size: 1.25rem;
}

/* === CARDS === */
.card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  border: 1px solid var(--color-border);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.card-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-md);
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

.card-text {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
}

.card-footer {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-top: var(--spacing-md);
}

/* === GRID === */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* === SECTION HEADER === */
.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-2xl);
}

.section-label {
  display: inline-block;
  color: var(--color-accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.875rem;
  margin-bottom: var(--spacing-sm);
}

.section-title {
  margin-bottom: var(--spacing-md);
}

.section-description {
  font-size: 1.125rem;
  color: var(--color-text-light);
}

/* === FOOTER === */
.footer {
  background: var(--color-dark);
  color: white;
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
  color: white;
  margin-bottom: var(--spacing-md);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-link {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-accent);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 0;
    left: -100%;
    width: 80%;
    height: 100vh;
    background: white;
    flex-direction: column;
    align-items: flex-start;
    padding: var(--spacing-3xl) var(--spacing-lg);
    box-shadow: var(--shadow-xl);
    transition: left var(--transition-normal);
    gap: var(--spacing-md);
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
  
  .trust-items {
    gap: var(--spacing-md);
  }
  
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

/* === UTILITY CLASSES === */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.opacity-80 { opacity: 0.8; }
.opacity-60 { opacity: 0.6; }