/* AllCharts Website - Warm Editorial Design System */

@import url('https://fonts.googleapis.com/css2?family=Newsreader:ital,wght@0,400;0,500;1,400&display=swap');

:root {
  /* Colors - Warm, human-centered palette (matched to the AllCharts app) */
  --color-bg: #FAF4EA;
  --color-bg-warm: #F3E9D6;
  --color-paper: #FFFFFF;
  --color-border: #ECE2CF;
  --color-border-soft: #F2E9D9;
  
  --color-ink: #211C16;
  --color-ink-2: #8A7E6E;
  --color-ink-3: #ADA08D;
  
  --color-accent: #C05F3D;
  --color-accent-deep: #9E4A2E;
  --color-accent-soft: #F6E1D2;
  --color-accent-tint: #F9E8DC;
  
  --color-sage: #5E7355;
  --color-sage-soft: #DCE4D2;
  
  --color-blue: #4A6E8C;

  /* Backward-compatible aliases (older markup uses these names) */
  --color-surface: #F3E9D6;
  --color-text-primary: #211C16;
  --color-text-secondary: #8A7E6E;
  --color-text-tertiary: #ADA08D;
  --color-accent-dark: #9E4A2E;
  --color-accent-light: #F6E1D2;
  --color-success: #5E7355;
  --color-success-light: #DCE4D2;
  
  /* Typography */
  --font-serif: 'Newsreader', Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  
  /* Border radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px 0 rgba(31, 24, 18, 0.08);
  --shadow-md: 0 4px 8px -2px rgba(31, 24, 18, 0.1);
  --shadow-lg: 0 10px 20px -5px rgba(31, 24, 18, 0.12);
  --shadow-xl: 0 20px 30px -10px rgba(31, 24, 18, 0.15);
}

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

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h1 { font-size: 2.5rem; letter-spacing: -0.03em; }
h2 { font-size: 2rem; letter-spacing: -0.025em; }
h3 { font-size: 1.5rem; letter-spacing: -0.02em; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

@media (min-width: 768px) {
  h1 { font-size: 3.5rem; }
  h2 { font-size: 2.75rem; }
  h3 { font-size: 2rem; }
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--color-accent-deep);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

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

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

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

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

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

/* Layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-xl);
  }
}

.section {
  padding: var(--space-3xl) 0;
}

/* Navigation */
.nav {
  position: sticky;
  top: 0;
  background: rgba(251, 247, 241, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: all 0.3s;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-md);
  max-width: 1200px;
  margin: 0 auto;
}

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

.nav-logo svg {
  width: 32px;
  height: 32px;
}

.nav-links {
  display: none;
  gap: var(--space-lg);
  list-style: none;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

.nav-link {
  color: var(--color-ink-2);
  font-weight: 500;
  transition: color 0.2s;
}

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

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

.mobile-menu-btn {
  display: block;
  background: none;
  border: none;
  padding: var(--space-xs);
  cursor: pointer;
}

@media (min-width: 768px) {
  .mobile-menu-btn {
    display: none;
  }
}

.mobile-menu {
  display: none;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-lg) var(--space-md);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.mobile-menu.active {
  display: flex;
}

@media (min-width: 768px) {
  .mobile-menu {
    display: none !important;
  }
}

/* Cards */
.card {
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all 0.3s;
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--color-sage-soft);
  color: var(--color-sage);
}

/* Icon */
.icon {
  width: 24px;
  height: 24px;
}

.icon-lg {
  width: 48px;
  height: 48px;
}

/* Utilities */
.text-center { text-align: center; }
.text-secondary { color: var(--color-ink-2); }
.text-lg { font-size: 1.25rem; line-height: 1.5; }
.text-xl { font-size: 1.5rem; line-height: 1.4; }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

/* Grid */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 {
  grid-template-columns: 1fr;
}

.grid-3 {
  grid-template-columns: 1fr;
}

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

/* Footer */
.footer {
  background: var(--color-bg-warm);
  border-top: 1px solid var(--color-border);
  padding: var(--space-3xl) 0 var(--space-lg);
}

.footer-content {
  display: grid;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

@media (min-width: 768px) {
  .footer-content {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer-section h4 {
  margin-bottom: var(--space-md);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-ink-2);
  font-family: var(--font-sans);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  list-style: none;
}

.footer-link {
  color: var(--color-ink-2);
  transition: color 0.2s;
}

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

.footer-bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  color: var(--color-ink-3);
  font-size: 0.875rem;
  text-align: center;
}