/* Exercise Breaks — shared stylesheet
   Mobile-first. Breakpoints at 768px (tablet) and 1024px (desktop).
   No external font loads, no third-party assets. */

:root {
  --color-sage: #6BAF92;
  --color-body: #4A4A4A;
  --color-muted: #6A6A6A;
  --color-neutral: #9A9A9A;
  --color-bg: #F5F5F5;
  --color-card-bg: #FFFFFF;
  --color-border: #E0E0E0;

  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --content-max: 720px;
  --wide-max: 1100px;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
}

/* Minimal reset */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
img, svg { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-stack);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--color-body);
  background: var(--color-bg);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* Layout containers */
.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-wide {
  max-width: var(--wide-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Headings */
h1, h2, h3, h4 {
  color: var(--color-body);
  line-height: 1.3;
  margin: var(--space-lg) 0 var(--space-sm);
  font-weight: 600;
}

h1 {
  font-size: 2rem;
  margin-top: var(--space-md);
}

h2 {
  font-size: 1.5rem;
  margin-top: var(--space-xl);
}

h3 {
  font-size: 1.2rem;
  margin-top: var(--space-lg);
}

h4 {
  font-size: 1.05rem;
}

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

/* Links */
a {
  color: var(--color-sage);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

a:hover, a:focus {
  text-decoration: none;
}

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

/* Lists */
ul, ol {
  margin: 0 0 var(--space-sm);
  padding-left: 1.5rem;
}

li {
  margin-bottom: var(--space-xs);
}

/* Skip link for keyboard users */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-sage);
  color: #fff;
  text-decoration: none;
  border-radius: 0 0 var(--radius-sm) 0;
  z-index: 100;
}

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

/* Header */
.site-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-sm) 0;
}

.site-header .container-wide {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.wordmark {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-sage);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.wordmark:hover, .wordmark:focus {
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.site-nav a {
  color: var(--color-body);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-nav a:hover, .site-nav a:focus {
  color: var(--color-sage);
}

/* Main */
main {
  padding: var(--space-lg) 0 var(--space-xl);
}

/* Outlined button (matches the app's Material 3 outlined button voice) */
.btn {
  display: inline-block;
  padding: 0.65rem 1.25rem;
  border: 2px solid var(--color-sage);
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-sage);
  font-weight: 600;
  text-decoration: none;
  transition: background-color 120ms ease, color 120ms ease;
}

.btn:hover, .btn:focus {
  background: var(--color-sage);
  color: #fff;
  text-decoration: none;
}

/* Outcome card grid (Home §4) */
.outcome-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin: var(--space-md) 0 var(--space-lg);
}

.outcome-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
}

.outcome-card h3 {
  margin: 0 0 var(--space-sm);
  font-size: 1.1rem;
  color: var(--color-sage);
}

.outcome-card p {
  font-size: 0.98rem;
  color: var(--color-body);
}

.outcome-card .card-link {
  margin-top: auto;
  padding-top: var(--space-sm);
  font-size: 0.95rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-lg) 0;
  margin-top: var(--space-xl);
}

.site-footer .container-wide {
  text-align: center;
}

.footer-nav {
  margin-bottom: var(--space-sm);
  font-size: 0.95rem;
  line-height: 1.9;
}

.footer-nav a {
  color: var(--color-body);
  text-decoration: none;
  margin: 0 0.25rem;
}

.footer-nav a:hover, .footer-nav a:focus {
  color: var(--color-sage);
  text-decoration: underline;
}

.footer-meta {
  color: var(--color-muted);
  font-size: 0.9rem;
  margin: 0;
}

/* Tablet */
@media (min-width: 768px) {
  body { font-size: 1.1rem; }
  h1 { font-size: 2.4rem; }
  h2 { font-size: 1.7rem; }
  h3 { font-size: 1.25rem; }

  .outcome-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* Desktop */
@media (min-width: 1024px) {
  .container, .container-wide {
    padding: 0 var(--space-lg);
  }

  .outcome-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}