/* Arboreal Hearth Design System */
:root {
  /* Colors */
  --surface: #fbf9f8;
  --surface-dim: #dcd9d9;
  --surface-bright: #fbf9f8;
  --surface-container-lowest: #ffffff;
  --surface-container-low: #f6f3f2;
  --surface-container: #f0eded;
  --surface-container-high: #eae8e7;
  --surface-container-highest: #e4e2e1;
  --on-surface: #1b1c1c;
  --on-surface-variant: #434843;
  --inverse-surface: #303030;
  --inverse-on-surface: #f3f0f0;
  --outline: #737973;
  --outline-variant: #c3c8c1;
  --surface-tint: #4d6453;
  
  --primary: #061b0e; /* Deep Forest Green */
  --on-primary: #ffffff;
  --primary-container: #1b3022;
  --on-primary-container: #819986;
  --inverse-primary: #b4cdb8;
  
  --secondary: #80552c; /* Oak Wood Brown */
  --on-secondary: #ffffff;
  --secondary-container: #fec391;
  --on-secondary-container: #794e26;
  
  --tertiary: #171815; /* Cream */
  --on-tertiary: #ffffff;
  --tertiary-container: #2c2c29;
  --on-tertiary-container: #95938f;
  
  --error: #ba1a1a;
  --on-error: #ffffff;
  --error-container: #ffdad6;
  --on-error-container: #93000a;
  
  --background: #fbf9f8;
  --on-background: #1b1c1c;

  /* Spacing */
  --spacing-base: 8px;
  --spacing-xs: 4px;
  --spacing-sm: 12px;
  --spacing-md: 24px;
  --spacing-lg: 48px;
  --spacing-xl: 80px;
  --gutter: 24px;
  --margin: 32px;

  /* Rounded */
  --rounded-sm: 0.25rem;
  --rounded-default: 0.5rem;
  --rounded-md: 0.75rem;
  --rounded-lg: 1rem;
  --rounded-xl: 1.5rem;
  --rounded-full: 9999px;

  /* Shadows - Skeuomorphic-Lite */
  --shadow-surface: 0 12px 24px -10px rgba(46, 22, 0, 0.15); /* Oak tinted shadow */
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.05);
  --shadow-modal: 0 20px 40px -15px rgba(6, 27, 14, 0.2); /* Forest tinted shadow */
}

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

body {
  background-color: var(--background);
  color: var(--on-background);
  font-family: 'Be Vietnam Pro', sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Texture Overlay */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* Typography */
h1, h2, h3, h4, .font-serif {
  font-family: 'Noto Serif', serif;
}

.headline-xl {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.headline-lg {
  font-size: 32px;
  font-weight: 600;
  line-height: 1.3;
}

.headline-md {
  font-size: 24px;
  font-weight: 600;
  line-height: 1.4;
}

.body-lg {
  font-size: 18px;
  font-weight: 400;
}

.body-md {
  font-size: 16px;
  font-weight: 400;
}

.label-md {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Components */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: var(--rounded-default);
  font-family: 'Be Vietnam Pro', sans-serif;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  border: none;
  gap: 8px;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--on-primary);
  box-shadow: 0 4px 12px rgba(6, 27, 14, 0.2);
}

.btn-primary:hover {
  background-color: var(--primary-container);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  background-color: rgba(128, 85, 44, 0.05);
  transform: translateY(-1px);
}

/* Header & Nav */
header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 50;
  background-color: rgba(251, 249, 248, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--surface-container-highest);
  transition: all 0.3s ease;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.logo {
  font-size: 24px;
  font-weight: 700;
  font-style: italic;
  color: var(--primary);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: var(--spacing-md);
}

.nav-link {
  text-decoration: none;
  color: var(--on-surface-variant);
  font-weight: 500;
  transition: color 0.2s ease;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
}

.nav-link.active {
  border-bottom-color: var(--primary);
}

/* Cards */
.card {
  background-color: var(--surface-container-lowest);
  border-radius: var(--rounded-lg);
  border: 1px solid var(--outline-variant);
  box-shadow: var(--shadow-surface);
  overflow: hidden;
  transition: transform 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
}

/* Footer */
footer {
  background-color: var(--surface-container-low);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  border-top: 1px solid var(--outline-variant);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

.footer-links {
  display: flex;
  gap: var(--spacing-md);
}

.footer-link {
  color: var(--on-surface-variant);
  text-decoration: none;
  font-size: 14px;
}

.footer-link:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .headline-xl {
    font-size: 36px;
}

/* Form Elements */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-family: 'Be Vietnam Pro', sans-serif;
  font-weight: 600;
  font-size: 14px;
  color: var(--on-surface-variant);
  margin-bottom: var(--spacing-xs);
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--outline-variant);
  border-radius: var(--rounded-default);
  background-color: var(--surface);
  font-family: 'Be Vietnam Pro', sans-serif;
  font-size: 16px;
  color: var(--on-surface);
  transition: all 0.2s ease;
  box-shadow: var(--shadow-inner);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(6, 27, 14, 0.1);
}

.auth-container {
  max-width: 480px;
  margin: 160px auto 80px;
  padding: var(--spacing-lg);
  background-color: rgba(246, 243, 242, 0.95);
  backdrop-filter: blur(8px);
  border: 1px solid var(--outline-variant);
  border-radius: var(--rounded-xl);
  box-shadow: var(--shadow-modal);
  position: relative;
  z-index: 10;
}

.auth-split-container {
  max-width: 1024px;
  margin: 120px auto 80px;
  display: flex;
  background-color: var(--surface);
  border: 1px solid var(--outline-variant);
  border-radius: var(--rounded-xl);
  box-shadow: var(--shadow-modal);
  overflow: hidden;
  position: relative;
  z-index: 10;
}

.auth-split-image {
  flex: 5;
  background-color: var(--primary-container);
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--spacing-lg);
}

.auth-split-image img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.6;
  mix-blend-mode: luminosity;
}

.auth-split-image .content {
  position: relative;
  z-index: 10;
  color: var(--on-primary);
}

.auth-split-form {
  flex: 7;
  padding: var(--spacing-lg) var(--spacing-xl);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.text-center {
  text-align: center;
}

.back-btn {
  position: fixed;
  top: 32px;
  left: 32px;
  z-index: 50;
  background: rgba(251, 249, 248, 0.9);
  backdrop-filter: blur(8px);
  padding: 8px 16px;
  border-radius: var(--rounded-full);
  border: 1px solid var(--outline-variant);
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  box-shadow: var(--shadow-surface);
  transition: all 0.2s ease;
}

.back-btn:hover {
  background-color: var(--surface-container-high);
}

/* Responsive Layout Utilities */
.grid-cols-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-cols-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-cols-2-asym { display: grid; grid-template-columns: 2fr 1fr; gap: 24px; }
.flex-wrap-mobile { display: flex; gap: 16px; align-items: center; }

@media (max-width: 992px) {
  .grid-cols-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-cols-2-asym { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .grid-cols-3, .grid-cols-2, .grid-cols-2-asym { grid-template-columns: 1fr !important; }
  .flex-wrap-mobile { flex-wrap: wrap; justify-content: center; gap: 16px !important; }
  
  .hero { height: auto !important; padding: 120px 0 60px 0; }
  
  .footer-content { flex-direction: column; text-align: center; align-items: center; }
  .footer-links { flex-direction: column; align-items: center; gap: 12px; }
  
  /* Make primary buttons full width on mobile if they are alone or wrap */
  .flex-wrap-mobile > .btn { width: 100%; justify-content: center; }
  
  /* Fix padding inside modals/CTAs */
  [style*="padding: 80px"] { padding: 40px !important; }
  [style*="padding: 64px"] { padding: 32px !important; }
  
  .section-padding { padding: var(--spacing-lg) 0; }
}