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

:root {
  --color-bg: #ffffff;
  --color-text: #1a1a2e;
  --color-text-muted: #4a4a68;
  --color-accent: #16213e;
  --color-accent-light: #0f3460;
  --color-surface: #f8f9fa;
  --color-border: #e2e4e9;
  --color-link: #1a56db;
  --color-link-hover: #0f3460;
  --color-focus: #2563eb;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-size-base: 1.125rem;
  --max-width: 64rem;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

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

/* ===== Skip Link ===== */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-sm);
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-accent);
  color: #fff;
  border-radius: 0 0 4px 4px;
  z-index: 100;
  text-decoration: none;
  font-weight: 600;
}

.skip-link:focus {
  top: 0;
}

/* ===== Layout ===== */
.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

/* ===== Typography ===== */
h1, h2, h3 {
  color: var(--color-accent);
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

a {
  color: var(--color-link);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.15s ease;
}

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

a:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ===== Header / Hero ===== */
header[role="banner"] {
  padding: var(--space-xl) 0;
  background-color: var(--color-accent);
  color: #fff;
}

header h1 {
  color: #fff;
}

.tagline {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  color: rgba(255, 255, 255, 0.8);
  margin-top: var(--space-xs);
  font-weight: 300;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ===== Sections ===== */
section {
  padding: var(--space-lg) 0;
}

section:nth-child(even) {
  background-color: var(--color-surface);
}

section p {
  max-width: 40rem;
  color: var(--color-text-muted);
}

/* ===== Ventures ===== */
.ventures-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr));
  gap: var(--space-md);
  margin-top: var(--space-sm);
}

.venture-card {
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg);
}

.venture-card h3 {
  margin-bottom: var(--space-xs);
}

.venture-card p {
  margin-bottom: var(--space-sm);
}

.venture-card a {
  font-weight: 500;
}

/* ===== Leadership ===== */
.leader {
  max-width: 40rem;
}

.leader h3 {
  margin-bottom: 0.25rem;
}

.leader-title {
  font-weight: 500;
  color: var(--color-accent-light);
  margin-bottom: var(--space-sm);
  font-size: 1rem;
}

.leader p:last-child {
  color: var(--color-text-muted);
}

/* ===== Contact ===== */
#contact p + p {
  margin-top: var(--space-xs);
  font-size: 0.9375rem;
}

/* ===== Footer ===== */
footer[role="contentinfo"] {
  padding: var(--space-md) 0;
  background-color: var(--color-accent);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
}

footer p + p {
  margin-top: 0.25rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  :root {
    --space-lg: 3rem;
    --space-xl: 4rem;
  }

  .container {
    padding-inline: var(--space-sm);
  }
}

@media (max-width: 375px) {
  :root {
    --space-lg: 2rem;
    --space-xl: 3rem;
    --font-size-base: 1rem;
  }
}

/* ===== Print ===== */
@media print {
  header[role="banner"],
  footer[role="contentinfo"] {
    background: none;
    color: var(--color-text);
  }

  header h1,
  .tagline {
    color: var(--color-text);
  }
}