:root {
  /* Palette */
  --color-sage: #8da399;
  /* Earthy Green */
  --color-sage-dark: #6e827a;
  --color-sand: #f4f1ea;
  /* Warm Background */
  --color-sand-dark: #e8e4db;
  --color-white: #ffffff;
  --color-charcoal: #2c3e50;
  /* Text */
  --color-text-light: #5d6d7e;

  /* Typography */
  --font-heading: 'Merriweather', serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing */
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 4rem;

  /* Layout */
  --container-width: 1200px;
  --radius: 8px;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  color: var(--color-charcoal);
  background-color: var(--color-white);
  line-height: 1.6;
  scroll-behavior: smooth;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

ul {
  list-style: none;
}

/* Utilities */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.btn-primary {
  display: inline-block;
  background-color: var(--color-sage);
  color: var(--color-white);
  padding: 12px 24px;
  border-radius: 50px;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

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

.full-width {
  width: 100%;
}

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

.bg-sand {
  background-color: var(--color-sand);
}

/* Nav */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-sage-dark);
}

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

.nav-links a:not(.btn-primary) {
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-links a:not(.btn-primary):hover {
  color: var(--color-sage);
}

/* Hero */
.hero {
  position: relative;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.3)), url('hero.png');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  margin-top: -80px;
  /* pull behind nav */
  padding-top: 80px;
}

.hero-content {
  position: relative;
  z-index: 1;
  color: var(--color-white);
  max-width: 800px;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 300;
  margin-bottom: var(--spacing-lg);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.highlight {
  font-weight: 400;
  font-style: italic;
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
  opacity: 0.9;
}

/* Concept Grid */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--spacing-xl);
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.concept-card {
  padding: var(--spacing-lg);
  border: 1px solid var(--color-sand-dark);
  border-radius: var(--radius);
  transition: transform 0.3s ease;
}

.concept-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-sage);
}

.concept-card h3 {
  color: var(--color-sage-dark);
  font-size: 1.25rem;
}

/* Lifestyle */
.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.amenity-list li {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.amenity-list .icon {
  font-size: 1.5rem;
}

.placeholder-map {
  background-color: var(--color-sage-dark);
  height: 400px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

/* Floor Plans */
.plans-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.plan-card {
  background: var(--color-white);
  border: 1px solid var(--color-sand-dark);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.plan-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
  border-color: var(--color-sage);
}

.plan-header {
  background-color: var(--color-sand);
  padding: var(--spacing-lg);
  text-align: center;
  border-bottom: 1px solid var(--color-sand-dark);
}

.plan-header h3 {
  color: var(--color-sage-dark);
  margin-bottom: var(--spacing-sm);
  font-size: 1.5rem;
}

.plan-total {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-charcoal);
}

.plan-details {
  padding: var(--spacing-lg);
}

.plan-row {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px dashed var(--color-sand-dark);
}

.plan-row:last-child {
  border-bottom: none;
}

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

.plan-value {
  font-weight: 600;
}

/* Contact */
.contact-wrapper {
  display: flex;
  justify-content: center;
}

.contact-box {
  background-color: var(--color-sand);
  padding: var(--spacing-xl);
  border-radius: var(--radius);
  width: 100%;
  max-width: 600px;
  text-align: center;
}

.contact-form {
  margin-top: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.form-group input {
  width: 100%;
  padding: 12px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-family: var(--font-body);
  font-size: 1rem;
}

/* Footer */
footer {
  padding: var(--spacing-lg) 0;
  text-align: center;
  background-color: var(--color-charcoal);
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }

  .nav-links {
    display: none;
    /* simple hide for prototype, would add burger menu in real app */
  }

  .split-layout {
    grid-template-columns: 1fr;
  }
}