/* 
  Jade Ledger Technologies - Core Styles
  Minimalist, data-forward, enterprise aesthetic.
*/
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Colors */
  --bg-primary: #FFFFFF;
  --bg-secondary: #FAFAF7;
  --bg-tertiary: #F3F4F0;

  --text-primary: #0B0D10;
  --text-secondary: #4B5563;
  --text-tertiary: #6B7280;
  --text-muted: #9CA3AF;

  --jade-base: #00C08B;
  --jade-hover: #009E73;
  --jade-light: #E6F9F3;

  --border-light: #E5E7EB;
  --border-dark: #D1D5DB;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Layout */
  --max-width: 1280px;
  --border-radius: 4px;
  /* Crisp, engineered structure */
  --border-radius-lg: 8px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.03);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-fast: 0s;
    --transition-normal: 0s;
  }
}

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

body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography elements */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

h1 {
  font-size: 3.5rem;
  letter-spacing: -0.03em;
}

h2 {
  font-size: 2.5rem;
}

h3 {
  font-size: 1.75rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
  max-width: 70ch;
}

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

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--jade-base);
  outline-offset: 2px;
}

/* Accessibility */
.skip-to-content {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--text-primary);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  font-weight: 500;
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-to-content:focus {
  top: 0;
}

.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;
}

/* Layout Utilities */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
  width: 100%;
}

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

.section-hero {
  padding: var(--space-32) 0 var(--space-24);
  position: relative;
  overflow: hidden;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-light);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-6);
}

.col-span-12 {
  grid-column: span 12;
}

.col-span-6 {
  grid-column: span 6;
}

.col-span-4 {
  grid-column: span 4;
}

.col-span-3 {
  grid-column: span 3;
}

.col-span-8 {
  grid-column: span 8;
}

/* Components */
.mono-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  display: block;
  margin-bottom: var(--space-2);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  font-weight: 500;
  font-size: 0.875rem;
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 1px solid transparent;
  line-height: 1;
}

.btn-primary {
  background-color: var(--jade-base);
  color: #fff;
  border-color: var(--jade-base);
}

.btn-primary:hover {
  background-color: var(--jade-hover);
  border-color: var(--jade-hover);
  color: #fff;
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border-dark);
}

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

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

.btn-outline:hover {
  background-color: var(--jade-light);
}

.btn-group {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* Cards */
.card {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-lg);
  padding: var(--space-8);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-dark);
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: var(--space-2);
}

.card-body {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* Chips */
.chip {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-light);
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* Pattern Backgrounds */
.pattern-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 0;
  opacity: 0.4;
  pointer-events: none;
}

.pattern-bg-content {
  position: relative;
  z-index: 1;
}

/* Watermark */
.brand-watermark {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 150%;
  max-width: 1200px;
  opacity: 0.02;
  pointer-events: none;
  z-index: 0;
}

/* Header & Nav */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  z-index: 1000;
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  border-bottom-color: var(--border-light);
  background-color: rgba(255, 255, 255, 0.98);
}

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

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.logo-icon {
  height: 48px;
  width: auto;
  object-fit: contain;
}

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

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.875rem;
}

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

/* Dropdown */
.dropdown {
  position: relative;
}

.dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-fast);
  padding: var(--space-2) 0;
  margin-top: var(--space-4);
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: block;
  padding: var(--space-2) var(--space-4);
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.dropdown-item:hover {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

/* Scroll Reveals */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms cubic-bezier(0.4, 0, 0.2, 1), transform 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-on-scroll.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Media Queries */
@media (max-width: 992px) {
  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 2rem;
  }

  .col-span-4,
  .col-span-3,
  .col-span-8,
  .col-span-6 {
    grid-column: span 12;
  }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
    /* Hide default, show via script class later */
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    flex-direction: column;
    padding: var(--space-6);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
  }

  .main-nav.nav-open {
    display: flex;
    align-items: flex-start;
  }

  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    border-left: 2px solid var(--border-light);
    margin-left: var(--space-2);
    margin-top: var(--space-2);
    background: transparent;
  }

  .mobile-toggle {
    display: block;
  }

  .btn-group {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
  }
}

/* Footer */
.site-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  padding: var(--space-12) 0 var(--space-6);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.footer-col h4 {
  font-size: 1rem;
  margin-bottom: var(--space-4);
}

.footer-link {
  display: block;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
  font-size: 0.875rem;
}

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

@media(max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}