:root {
  /* Colors - Absolute High Contrast */
  --bg: #ffffff;
  --text: #000000;
  --accent: #ff3300;
  /* International Orange */
  --border: #000000;
  --muted: #666666;

  /* Spacing - Rigid Scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 64px;
  --space-7: 128px;

  /* Grid */
  --grid-cols: 12;
  --grid-gap: 20px;
  --max-w: 1440px;
  /* Wider for modern screens */

  /* Typography - Swiss Style (Helvetica/Inter) */
  --font-stack: "Helvetica Neue", Helvetica, Arial, sans-serif;

  /* Type Scale - Massive Contrast */
  --fs-xs: 12px;
  /* Labels, Meta */
  --fs-sm: 16px;
  /* Body copy */
  --fs-md: 24px;
  /* Subheadings */
  --fs-lg: 48px;
  /* Section Headers */
  --fs-xl: clamp(64px, 8vw, 120px);
  /* Hero */

  --lh-tight: 0.9;
  --lh-base: 1.2;
  --lh-loose: 1.5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #050505;
    --text: #ffffff;
    --border: #333333;
    --muted: #888888;
  }
}

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

html {
  font-family: var(--font-stack);
  background: var(--bg);
  color: var(--text);
  font-size: var(--fs-sm);
  line-height: var(--lh-loose);
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  width: 100%;
}

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

ul {
  list-style: none;
}

button {
  background: none;
  border: none;
  font: inherit;
  color: inherit;
  cursor: pointer;
}

/* Utility: The Grid */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--space-4);
  display: grid;
  grid-template-columns: repeat(var(--grid-cols), 1fr);
  gap: var(--grid-gap);
}

/* Typography Utilities */
.type-hero {
  font-size: var(--fs-xl);
  line-height: var(--lh-tight);
  font-weight: 700;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  /* Optional: adds to the Swiss feel */
}

.type-h1 {
  font-size: var(--fs-lg);
  line-height: 1.0;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.type-h2 {
  font-size: var(--fs-md);
  font-weight: 700;
  line-height: 1.1;
}

.type-body {
  font-size: var(--fs-sm);
  font-weight: 400;
  max-width: 60ch;
}

.type-label {
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
}

/* Layout Components */

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: var(--space-3) 0;
  background: var(--bg);
  /* Solid background for readability */
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  align-items: center;
}

.brand {
  grid-column: span 3;
  font-weight: 700;
  font-size: var(--fs-md);
  letter-spacing: -0.02em;
}

.site-nav {
  grid-column: 4 / -1;
  display: flex;
  justify-content: flex-end;
  gap: var(--space-4);
}

.site-nav a {
  font-size: var(--fs-xs);
  text-transform: uppercase;
  font-weight: 700;
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  grid-column: 12;
  justify-self: end;
  font-size: var(--fs-xs);
  font-weight: 700;
  text-transform: uppercase;
  border: 1px solid var(--border);
  padding: var(--space-2) var(--space-3);
  z-index: 200;
  position: relative;
}

.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: var(--bg);
  z-index: 150;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.mobile-menu.is-open {
  opacity: 1;
  pointer-events: all;
}

.mobile-menu nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  text-align: center;
}

.mobile-menu a {
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--text);
  text-transform: uppercase;
}

.mobile-menu a:hover {
  color: var(--accent);
}

/* Hero Section */
.hero {
  padding-top: calc(var(--space-7) + var(--space-6));
  padding-bottom: var(--space-7);
  min-height: 90vh;
  display: flex;
  align-items: flex-end;
  /* Bottom align text */
  border-bottom: 1px solid var(--border);
}

.hero-content {
  grid-column: 1 / -1;
}

.hero .kicker {
  display: block;
  margin-bottom: var(--space-4);
  color: var(--accent);
}

.hero h1 {
  margin-bottom: var(--space-5);
}

.hero .lede {
  font-size: var(--fs-md);
  max-width: 40ch;
  margin-bottom: var(--space-5);
}

.hero .actions {
  display: flex;
  gap: var(--space-4);
}

/* Buttons - Raw Style */
.button {
  display: inline-block;
  border: 2px solid var(--text);
  padding: var(--space-3) var(--space-5);
  font-weight: 700;
  text-transform: uppercase;
  font-size: var(--fs-xs);
  transition: background 0.2s, color 0.2s;
  border-radius: 0;
  /* SHARP EDGES */
}

.button:hover {
  background: var(--text);
  color: var(--bg);
}

.button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.button.primary:hover {
  background: transparent;
  color: var(--accent);
}

/* Sections General */
section {
  padding: var(--space-7) 0;
  border-bottom: 1px solid var(--border);
}

section h2 {
  grid-column: 1 / 4;
  margin-bottom: var(--space-5);
}

/* Work Grid */
.work .cases {
  grid-column: 4 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--grid-gap);
}

.card {
  border: 1px solid var(--border);
  padding: var(--space-4);
  background: transparent;
  border-radius: 0;
  /* SHARP */
  transition: border-color 0.2s;
}

.card:hover {
  border-color: var(--accent);
}

.card h3 {
  font-size: var(--fs-md);
  margin-bottom: var(--space-2);
}

.card .meta {
  font-size: var(--fs-xs);
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: var(--space-3);
  display: block;
}

.card p {
  margin-bottom: var(--space-4);
  color: var(--text);
}

.card .actions a {
  font-size: var(--fs-xs);
  font-weight: 700;
  text-decoration: underline;
}

/* Capabilities - List Style */
.capabilities .grid {
  grid-column: 4 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--grid-gap);
}

.capabilities .list li {
  padding: var(--space-2) 0;
  border-top: 1px solid var(--border);
  font-size: var(--fs-sm);
}

/* Engagements */
.engagements .grid {
  grid-column: 4 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--grid-gap);
}

/* Process */
.process .timeline {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--grid-gap);
  border-top: 1px solid var(--border);
  padding-top: var(--space-5);
}

.step .kicker {
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--border);
  /* Subtle number */
  margin-bottom: var(--space-3);
}

/* FAQ */
.faq .faqs {
  grid-column: 4 / -1;
}

details {
  border-bottom: 1px solid var(--border);
  padding: var(--space-4) 0;
}

summary {
  font-size: var(--fs-md);
  font-weight: 700;
  list-style: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
}

summary::after {
  content: "+";
}

details[open] summary::after {
  content: "-";
}

details p {
  margin-top: var(--space-3);
  max-width: 50ch;
}

/* Footer */
.site-footer {
  padding: var(--space-7) 0;
  background: var(--text);
  color: var(--bg);
}

.site-footer .container {
  display: grid;
}

.site-footer .brand {
  grid-column: 1 / 4;
}

.site-footer .foot-nav {
  grid-column: 4 / -1;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.site-footer a {
  font-size: var(--fs-md);
  font-weight: 700;
}

.site-footer a:hover {
  color: var(--accent);
}

/* Responsive */
@media (max-width: 960px) {
  :root {
    --grid-cols: 6;
  }

  .site-nav {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .hero h1 {
    font-size: 15vw;
  }

  section h2 {
    grid-column: 1 / -1;
    margin-bottom: var(--space-4);
  }

  .work .cases,
  .capabilities .grid,
  .engagements .grid,
  .faq .faqs {
    grid-column: 1 / -1;
    grid-template-columns: 1fr;
  }

  .process .timeline {
    grid-template-columns: 1fr 1fr;
  }
}