/* ==========================================================================
   ARKAN ARCHITECTS — ARCHITECTURAL MONOGRAPH DESIGN SYSTEM (LIGHT THEME)
   Typography: Plus Jakarta Sans + Cormorant Garamond + JetBrains Mono
   Palette: Warm Limestone Parchment (#FAFAF7), Carbon (#111317), Architectural Bronze (#937446)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,400&family=JetBrains+Mono:wght@400;500;600&family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&display=swap');

:root {
  /* Color Palette — Warm Architectural Limestone & Carbon */
  --color-bg: #FAFAF7;
  --color-surface: #FFFFFF;
  --color-surface-hover: #F6F5F0;
  --color-surface-sunken: #F2EFE9;
  --color-text-primary: #111317;
  --color-text-secondary: #4A505C;
  --color-text-muted: #727986;
  --color-accent: #9E7B4F;
  --color-accent-hover: #836338;
  --color-accent-light: rgba(158, 123, 79, 0.08);
  --color-accent-glow: rgba(158, 123, 79, 0.25);
  --color-border: #E5E2DA;
  --color-border-subtle: #EFECE5;
  --color-border-hover: #9E7B4F;
  --color-dark-bg: #111317;
  --color-dark-surface: #181B20;
  --color-dark-text: #FAFAF7;
  --color-error: #D03D3D;
  --color-success: #2E854B;

  /* Typography */
  --font-heading: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  /* Type Scale */
  --text-hero: clamp(2.5rem, 5.5vw, 4.5rem);
  --text-h1: clamp(2.15rem, 4vw, 3.25rem);
  --text-h2: clamp(1.65rem, 3vw, 2.35rem);
  --text-h3: clamp(1.25rem, 2vw, 1.65rem);
  --text-body-lg: clamp(1.125rem, 1.4vw, 1.25rem);
  --text-body: 1rem;
  --text-sm: 0.875rem;
  --text-meta: 0.8125rem;
  --text-mono: 0.75rem;

  /* Spacing Scale */
  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6.5rem;

  /* Layout Containers */
  --container-max: 1380px;
  --container-wide: 1540px;
  --container-reading: 740px;
  --header-height: 80px;

  /* Radii */
  --radius-none: 0px;
  --radius-subtle: 3px;
  --radius-card: 6px;
  --radius-tag: 100px;

  /* Motion & Transitions */
  --ease-architectural: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 180ms;
  --duration-normal: 320ms;
  --duration-slow: 600ms;
  --duration-cinematic: 950ms;
}

/* --------------------------------------------------------------------------
   Reset & Base Styles
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  background-color: var(--color-bg);
  color: var(--color-text-primary);
}

body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: 1.65;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Accessible focus styling */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* Skip link */
.skip-to-content {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 9999;
  background-color: var(--color-text-primary);
  color: #FFFFFF;
  padding: 0.75rem 1.25rem;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-subtle);
  transition: top var(--duration-fast) var(--ease-architectural);
}
.skip-to-content:focus {
  top: 1rem;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--color-text-primary);
}

.hero-display-title {
  font-size: var(--text-hero);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.05;
}

.page-title {
  font-size: var(--text-h1);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.section-title {
  font-size: var(--text-h2);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.sub-title {
  font-size: var(--text-h3);
  font-weight: 600;
}

p {
  margin-bottom: var(--space-sm);
}
p:last-child {
  margin-bottom: 0;
}

.lead-text {
  font-size: var(--text-body-lg);
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.secondary-text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.mono-tag {
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-architectural);
}

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

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

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

/* Layout Helpers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1.25rem, 3.5vw, 3rem);
  padding-right: clamp(1.25rem, 3.5vw, 3rem);
}

.container-wide {
  width: 100%;
  max-width: var(--container-wide);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1.25rem, 3.5vw, 3rem);
  padding-right: clamp(1.25rem, 3.5vw, 3rem);
}

.reading-measure {
  max-width: var(--container-reading);
}

.section {
  padding-top: clamp(3.5rem, 6vw, 6rem);
  padding-bottom: clamp(3.5rem, 6vw, 6rem);
}

.section-cream {
  background-color: var(--color-surface-sunken);
  border-top: 1px solid var(--color-border-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
}

.section-white {
  background-color: var(--color-surface);
}

.grid-2col {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .grid-2col {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
  }
}

.grid-3col {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .grid-3col {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
  }
}

/* Aspect Ratio Utilities */
.aspect-landscape { aspect-ratio: 16 / 10; }
.aspect-square { aspect-ratio: 1 / 1; }
.aspect-portrait { aspect-ratio: 4 / 5; }

/* View Transitions Support */
@view-transition {
  navigation: auto;
}

::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 300ms;
  animation-timing-function: var(--ease-architectural);
}

/* Clean Custom Scrollbar */
::-webkit-scrollbar {
  width: 9px;
  height: 9px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
  background: #D8D4CA;
  border-radius: 4px;
  border: 2px solid var(--color-bg);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent);
}