:root {
  /* Colors */
  --primary: #7a580b; /* Gold */
  --primary-container: #c79d4d; /* Bright Gold */
  --secondary: #22619b; /* Blueprint Blue */
  --surface: #faf9f4; /* Off-white Bone */
  --background: #faf9f4;
  --surface-dim: #dbdad5;
  --surface-container-lowest: #ffffff;
  --surface-container-low: #f5f4ef;
  --surface-container-high: #e9e8e3;
  --surface-container-highest: #e3e3de;
  --on-surface: #1b1c19;
  --on-surface-variant: #4e4638;
  --outline-variant: rgba(210, 197, 179, 0.15); /* Ghost border fallback */

  /* Typography */
  --font-display: 'Manrope', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing Scale - Generous whitespace */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-4: 1rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-24: 8.5rem;  /* As per guidelines */
  --spacing-32: 12rem;

  /* Radii */
  --radius-md: 0.375rem;
  --radius-xl: 0.75rem;
  
  /* Elevations / Depth */
  --shadow-ambient: 0 10px 40px rgba(27, 28, 25, 0.05); /* Soft diffused */
}

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

body {
  background-color: var(--background);
  color: var(--on-surface);
  font-family: var(--font-body);
  line-height: 1.6;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Typography elements */
h1, h2, h3, h4, .display-lg, .headline {
  font-family: var(--font-display);
  font-weight: 300;
  color: var(--on-surface);
  line-height: 1.1;
}

h1, .display-lg { font-size: clamp(2.5rem, 5vw, 4.5rem); letter-spacing: -0.02em; }
h2, .headline { font-size: clamp(1.8rem, 3vw, 2.5rem); letter-spacing: 0.02em; }

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; object-fit: cover; }

/* Structural Layout */
.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: var(--spacing-24) 0;
}

.no-line-rule {
  /* Structural boundaries via background color shifts, no 1px borders */
  border: none;
}

/* --- Components --- */

/* Navigation */
.glass-nav {
  position: fixed;
  top: 0; left: 0; width: 100%;
  background: rgba(250, 249, 244, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 1000;
  transition: transform 0.3s ease;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-6) 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.brand {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: var(--spacing-8);
  align-items: center;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: 0.875rem; /* label-sm equivalent */
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--primary);
  transition: width 0.3s ease;
}
.nav-links a:hover::after { width: 100%; }

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--on-surface);
  cursor: pointer;
}

@media (max-width: 992px) {
  .nav-links {
    display: none; /* simple hidden for mobile, can be improved in JS */
  }
  .mobile-toggle {
    display: block;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: none;
}

.btn-primary {
  background: linear-gradient(150deg, var(--primary) 0%, var(--primary-container) 100%);
  color: #ffffff; 
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-ambient);
}

.btn-primary:hover {
  box-shadow: 0 15px 50px rgba(199, 157, 77, 0.4);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--surface-container-highest);
  color: var(--primary);
  border-radius: var(--radius-xl);
}
.btn-secondary:hover {
  background: var(--primary-fixed-dim);
}

.btn-outline {
  background: transparent;
  color: var(--on-surface);
  padding: 0;
  padding-bottom: 2px;
  border: none;
  border-bottom: 1px solid rgba(210, 197, 179, 0.2);
}
.btn-outline:hover {
  border-bottom-color: var(--primary);
  color: var(--primary);
}

/* Cards & Surfaces */
.bg-lowest { background-color: var(--surface-container-lowest); }
.bg-low { background-color: var(--surface-container-low); }

.card {
  background-color: var(--surface-container-lowest);
  border-radius: var(--radius-md);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.card:hover {
  box-shadow: var(--shadow-ambient);
  transform: translateY(-4px);
}

/* Form Inputs */
.input-field {
  width: 100%;
  background-color: var(--surface-container-low);
  border: none;
  border-bottom: 1px solid rgba(210, 197, 179, 0.15); /* Ghost border */
  padding: 1.5rem 1rem 1rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--on-surface);
  transition: all 0.3s ease;
}
.input-field:focus {
  outline: none;
  border-bottom-color: var(--primary);
  background-color: rgba(199, 157, 77, 0.05);
}

/* Footer */
footer {
  padding: var(--spacing-16) 0 var(--spacing-6);
  background-color: var(--surface-container-low);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--spacing-8);
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  margin-bottom: var(--spacing-4);
}

.footer-nav {
  display: flex;
  gap: var(--spacing-6);
}

.footer-nav a {
  font-size: 0.875rem;
  color: var(--on-surface-variant);
  transition: color 0.3s ease;
}

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

.footer-bottom {
  margin-top: var(--spacing-12);
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--on-surface-variant);
  border-top: 1px solid var(--outline-variant);
  padding-top: var(--spacing-6);
}