/* ==========================================================================
   Lotus Oak Website - Design System
   VERSION: 1.0.0

   Design tokens aligned with L0CI (lotusoak.capital) for brand consistency.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Design Tokens
   -------------------------------------------------------------------------- */

:root {
  /* Colors - Lotus Oak Unified Palette */
  --color-bg: #FAF9F6;
  --color-text: #2D3436;
  --color-text-muted: #5D6D7E;
  --color-accent: #74A892;
  --color-border: #E5E3DE;
  --color-gold: #B8860B;

  /* Typography */
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Type Scale (1.25 ratio) */
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.563rem;
  --font-size-2xl: 1.953rem;
  --font-size-3xl: 2.441rem;

  /* Line Heights */
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.6;

  /* Spacing Scale (8px base) */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-6: 3rem;
  --space-8: 4rem;

  /* Layout */
  --nav-width: 2.5rem;
  --content-max-width: 38rem;
  --content-padding: var(--space-6);

  /* Animation */
  --transition-base: 300ms ease;
}

/* --------------------------------------------------------------------------
   Reset & Base
   -------------------------------------------------------------------------- */

*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

html {
  scroll-snap-type: y mandatory;
  overflow-y: scroll;
}

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

/* --------------------------------------------------------------------------
   Skip Link (Accessibility)
   -------------------------------------------------------------------------- */

.skip-link {
  position: absolute;
  top: -3rem;
  left: var(--space-2);
  padding: var(--space-1) var(--space-2);
  background: var(--color-text);
  color: var(--color-bg);
  font-size: var(--font-size-sm);
  text-decoration: none;
  border-radius: 0 0 4px 4px;
  z-index: 1000;
  transition: top var(--transition-base);
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */

nav {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-width);
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

nav a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  font-family: var(--font-serif);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  border-radius: 50%;
  transition: all var(--transition-base);
}

nav a:hover,
nav a:focus {
  color: var(--color-text);
  background-color: var(--color-border);
  outline: none;
}

/* Home link (circle symbol) */
.nav-home a {
  font-size: var(--font-size-lg);
  font-family: var(--font-sans);
  font-weight: 300;
}

/* Active nav state */
nav a.active {
  color: var(--color-text);
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   Main Content - Placeholder Layout
   -------------------------------------------------------------------------- */

main {
  margin-left: var(--nav-width);
  min-height: 100vh;
  padding: var(--space-4);
}

/* --------------------------------------------------------------------------
   Placeholder Styles
   -------------------------------------------------------------------------- */

.placeholder-container {
  text-align: center;
  max-width: 600px;
}

.site-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 400;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  margin: 0 0 var(--space-2);
}

.site-tagline {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-6);
  font-style: italic;
}

/* --------------------------------------------------------------------------
   Page Sections (Scroll Snap)
   -------------------------------------------------------------------------- */

.page-section {
  scroll-snap-align: start;
  min-height: 100vh;
  padding: var(--space-8) var(--space-4);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

/* Progressive enhancement: Only animate when JS is available
   Without JS, sections are visible by default */
.js .page-section {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.js .page-section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Hero section specific styles */
.hero-section {
  min-height: 100vh;
}

.hero-content {
  max-width: 600px;
}

.page-content {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.page-content p {
  margin: 0 0 var(--space-3);
}

.page-content p:last-child {
  margin-bottom: 0;
}

.coming-soon {
  display: inline-block;
  padding: 0.75rem 2rem;
  border: 1px solid var(--color-accent);
  border-radius: 2px;
}

.coming-soon .label {
  font-size: var(--font-size-sm);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text);  /* Use text color for WCAG AA contrast (4.5:1) */
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-2) var(--space-4);
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  background-color: var(--color-bg);
  letter-spacing: 0.05em;
  z-index: 50;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 768px) {
  :root {
    --nav-width: 3rem;
    --content-padding: var(--space-3);
  }

  nav a {
    width: 2rem;
    height: 2rem;
    font-size: var(--font-size-sm);
  }

  .site-title {
    letter-spacing: 0.15em;
  }
}

/* --------------------------------------------------------------------------
   Print
   -------------------------------------------------------------------------- */

@media print {
  nav,
  .skip-link,
  .site-footer {
    display: none;
  }

  main {
    margin-left: 0;
  }
}

/* --------------------------------------------------------------------------
   Reduced Motion Accessibility
   -------------------------------------------------------------------------- */

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

  html {
    scroll-snap-type: none;
    scroll-behavior: auto;
  }

  .js .page-section {
    opacity: 1;
    transform: none;
  }
}