/* ========================================
   LANDSCAPE STUDIO DESIGN SYSTEM
   Base CSS - Organic, Architectural, Serene
   ======================================== */

/* -----------------------------------------
   1. VARIABLES
   ----------------------------------------- */
:root {
  /* Organic Color Palette */
  --color-bg: #FAF9F6;                    /* Warm sand/beige off-white */
  --color-surface: #FFFFFF;               /* Pure white for cards */
  --color-surface-alt: #F5F1E8;           /* Warm cream for alternates */
  
  --color-text: #2C3531;                  /* Deep charcoal with green undertone */
  --color-text-secondary: #5C6B60;        /* Muted sage-gray */
  --color-text-muted: #8B968C;            /* Soft stone gray */
  
  /* Primary - Organic Green */
  --color-primary: #5B7C58;               /* Sage/Forest green */
  --color-primary-hover: #4A6548;         /* Deeper forest */
  --color-primary-light: #E8F0E6;         /* Mint cream */
  --color-primary-dark: #3D4F3B;          /* Dark olive */
  
  /* Secondary - Earth & Sky */
  --color-secondary: #8B7355;             /* Warm earth brown */
  --color-secondary-hover: #6F5B44;       /* Darker earth */
  --color-accent: #7BA7BC;                /* Soft sky blue */
  --color-accent-light: #E3F0F5;          /* Pale sky */
  
  /* Semantic Colors */
  --color-success: #6B8E6B;               /* Natural green */
  --color-warning: #C9A66B;               /* Golden earth */
  --color-danger: #B87070;                /* Muted terracotta */
  --color-info: #7BA7BC;                  /* Sky blue */
  
  /* Stone Gray Scale */
  --color-gray-50: #FAFAF8;
  --color-gray-100: #F2F1ED;
  --color-gray-200: #E5E4E0;
  --color-gray-300: #D1D0CC;
  --color-gray-400: #A3A29E;
  --color-gray-500: #757471;
  --color-gray-600: #5C5B58;
  --color-gray-700: #44433F;
  --color-gray-800: #2D2C29;
  --color-gray-900: #161614;
  
  /* Typography */
  --font-heading: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', 'Segoe UI', system-ui, -apple-serif, sans-serif;
  --font-serif: 'Georgia', 'Times New Roman', serif; /* For editorial accents */
  
  /* Fluid Type Scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.25vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.5vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  --text-3xl: clamp(1.875rem, 1.6rem + 1.25vw, 2.5rem);
  --text-4xl: clamp(2.25rem, 1.9rem + 1.5vw, 3rem);
  --text-5xl: clamp(2.25rem, 1.9rem + 1.5vw, 3rem);
  --text-6xl: clamp(3.75rem, 3rem + 2.5vw, 5rem);
  
  --leading-tight: 1.2;
  --leading-snug: 1.4;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;
  
  /* Spacing Scale (8px base) */
  --space-0: 0;
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  
  /* Borders & Radius (Architectural but Organic) */
  --radius-sm: 0.25rem;   /* 4px */
  --radius-md: 0.5rem;    /* 8px */
  --radius-lg: 0.75rem;   /* 12px */
  --radius-xl: 1rem;      /* 16px */
  --radius-2xl: 1.5rem;   /* 24px */
  --radius-full: 9999px;
  
  /* Shadows (Soft, Natural Depth) */
  --shadow-sm: 0 1px 2px 0 rgba(44, 53, 49, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(44, 53, 49, 0.08), 0 2px 4px -2px rgba(44, 53, 49, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(44, 53, 49, 0.08), 0 4px 6px -4px rgba(44, 53, 49, 0.06);
  --shadow-xl: 0 20px 25px -5px rgba(44, 53, 49, 0.08), 0 8px 10px -6px rgba(44, 53, 49, 0.06);
  --shadow-inner: inset 0 2px 4px 0 rgba(44, 53, 49, 0.05);
  
  /* Transitions (Smooth, Serene) */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slower: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Layout */
  --container-max: 1280px;
  --container-narrow: 768px;
  --container-padding: var(--space-4);
  --header-height: 80px;
}

@media (min-width: 768px) {
  :root {
    --container-padding: var(--space-6);
  }
}

@media (min-width: 1024px) {
  :root {
    --container-padding: var(--space-8);
  }
}

/* -----------------------------------------
   2. RESET & NORMALIZE
   ----------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  min-height: 100vh;
  line-height: var(--leading-normal);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

/* -----------------------------------------
   3. BASE STYLES
   ----------------------------------------- */
body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-weight: 400;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
  color: var(--color-text);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
  margin-bottom: var(--space-4);
  }

p:last-child {
  margin-bottom: 0;
}

/* Links */
a {
  transition: color var(--transition-fast);
}

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

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Selection */
::selection {
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

/* -----------------------------------------
   4. UTILITY CLASSES
   ----------------------------------------- */

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.sr-only:focus {
  position: static;
  width: auto;
  height: auto;
  padding: inherit;
  margin: inherit;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

/* Flex Utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

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

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.flex-wrap {
  flex-wrap: wrap;
}

.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }
.gap-12 { gap: var(--space-12); }
.gap-16 { gap: var(--space-16); }

/* Grid Utilities */
.grid {
  display: grid;
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* Spacing Utilities */
.m-0 { margin: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }

.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

/* Text Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-sm { font-size: var(--text-sm); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }

.font-serif { font-family: var(--font-serif); }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }

/* -----------------------------------------
   5. COMPONENTS
   ----------------------------------------- */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: 500;
  line-height: 1.5;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
  text-decoration: none;
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.btn-primary {
  background-color: var(--color-primary);
  color: white!important;
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

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

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

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

.btn-ghost {
  background-color: transparent;
  color: var(--color-text);
  border-color: transparent;
}

.btn-ghost:hover {
  background-color: var(--color-gray-100);
  color: var(--color-primary);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
  border-radius: var(--radius-lg);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  border-radius: var(--radius-sm);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* Forms / Inputs */
.input,
.textarea,
.select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input:focus,
.textarea:focus,
.select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.input::placeholder,
.textarea::placeholder {
  color: var(--color-text-muted);
}

.input:disabled,
.textarea:disabled,
.select:disabled {
  background-color: var(--color-gray-100);
  cursor: not-allowed;
  opacity: 0.6;
}

.textarea {
  min-height: 120px;
  resize: vertical;
}

.label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-group {
  margin-bottom: var(--space-4);
}

/* Cards */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-200);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-interactive:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-header {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-gray-200);
}

.card-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.card-body {
  color: var(--color-text-secondary);
}

.card-footer {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-gray-200);
}

/* Navigation */
.nav-link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: var(--color-gray-100);
}

.nav-link.active {
  color: var(--color-primary);
  background-color: var(--color-primary-light);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
  background-color: var(--color-gray-100);
  color: var(--color-text-secondary);
}

.badge-primary {
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.badge-secondary {
  background-color: var(--color-accent-light);
  color: var(--color-info);
}

/* Dividers */
.divider {
  width: 100%;
  height: 1px;
  background-color: var(--color-gray-200);
  margin: var(--space-8) 0;
}

/* Section Spacing */
.section {
  padding: var(--space-16) 0;
}

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

/* -----------------------------------------
   6. ACCESSIBILITY ENHANCEMENTS
   ----------------------------------------- */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Skip to main content */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: white;
  padding: 8px;
  text-decoration: none;
  z-index: 100;
}

.skip-link:focus {
  top: 0;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .btn:hover,
  .card-interactive:hover {
    transform: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-text: #000000;
    --color-bg: #FFFFFF;
    --color-primary: #006400;
  }
  
  .card {
    border-width: 2px;
  }
}