/* Shared Data – Foundation for Shared Impact */

:root {
  --color-bg: #fafafa;
  --color-bg-alt: #f0f0f0;
  --color-text: #1a1a1a;
  --color-text-muted: #555;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-border: #e5e5e5;
  --font-sans: "Segoe UI", system-ui, -apple-system, sans-serif;
  --max-width: 720px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* Skip link – visible on focus */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-sm);
  z-index: 100;
  padding: var(--space-sm) var(--space-md);
  font-size: 0.9375rem;
  font-weight: 500;
  color: #fff;
  background: var(--color-accent);
  border-radius: 6px;
  text-decoration: none;
  transition: top 0.15s ease;
}

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

/* Hero */
.hero {
  padding: var(--space-xl) var(--space-md);
  text-align: center;
  background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
  border-bottom: 1px solid var(--color-border);
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero h1 {
  margin: 0 0 var(--space-sm);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero .tagline {
  margin: 0 0 var(--space-xs);
  font-size: 1.125rem;
  color: var(--color-text-muted);
}

.hero .attribution {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.hero .attribution a {
  color: var(--color-accent);
  text-decoration: none;
}

.hero .attribution a:hover {
  text-decoration: underline;
}

/* Sections */
.section {
  padding: var(--space-xl) var(--space-md);
}

.section--alt {
  background-color: var(--color-bg-alt);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section h2 {
  margin: 0 0 var(--space-md);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.section-intro {
  margin: 0 0 var(--space-md);
  color: var(--color-text-muted);
}

.section p {
  margin: 0 0 var(--space-sm);
}

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

/* Ethos list */
.ethos-list {
  margin: 0;
  padding-left: 1.25rem;
}

.ethos-list li {
  margin-bottom: var(--space-sm);
}

.ethos-list li:last-child {
  margin-bottom: 0;
}

/* Directory grid */
.directory-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

@media (min-width: 640px) {
  .directory-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Cards */
.card {
  padding: var(--space-md);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.section--alt .card {
  background: #fff;
}

.card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.08);
}

.card-title {
  margin: 0 0 var(--space-xs);
  font-size: 1.125rem;
  font-weight: 600;
}

.card-desc {
  margin: 0 0 var(--space-sm);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.card-link {
  display: inline-block;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-accent);
  text-decoration: none;
}

.card-link:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

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

/* Buttons */
.btn {
  display: inline-block;
  margin-top: var(--space-sm);
  padding: 0.625rem 1.25rem;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  color: #fff;
  background-color: var(--color-accent);
  border: none;
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

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

.btn:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn--secondary {
  color: var(--color-accent);
  background-color: transparent;
  border: 1px solid var(--color-accent);
}

.btn--secondary:hover {
  background-color: rgba(37, 99, 235, 0.08);
}

/* Links in body */
a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

a:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Footer */
.footer {
  padding: var(--space-lg) var(--space-md);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
}

.footer p {
  margin: 0 0 var(--space-xs);
}

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

.footer a {
  color: var(--color-text-muted);
}

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

.footer-links {
  margin-top: var(--space-xs);
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .card,
  .btn {
    transition: none;
  }
}