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

/* Every screen and state in this app is pre-rendered and toggled by the
   `hidden` attribute (src/app.js sets el.hidden, never inline styles or a
   class). An element-specific `display` rule (e.g. .sheet-backdrop's
   `display: flex`) is an author style and always beats the UA stylesheet's
   default `[hidden] { display: none }`, so without this override a "hidden"
   sheet backdrop stays on screen, stacked, intercepting every click. */
[hidden] { display: none !important; }

body {
  margin: 0;
  -webkit-font-smoothing: antialiased;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.45;
  text-wrap: pretty;
  padding-bottom: 40px;
}

a { color: var(--summit-green); text-decoration: none; }
a:hover { color: var(--summit-green-dark); text-decoration: underline; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  letter-spacing: -.02em;
  margin: 0;
}

@keyframes ssFade { from { opacity: 0 } to { opacity: 1 } }
@keyframes ssUp { from { transform: translateY(16px); opacity: .6 } to { transform: translateY(0); opacity: 1 } }
@keyframes ssPop { from { transform: translateY(8px) scale(.98); opacity: 0 } to { transform: translateY(0) scale(1); opacity: 1 } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* The design is one responsive layout: a single column on a 390px phone that
   reflows continuously up to a centred 1180px shell. No breakpoint switch. */
.shell {
  width: min(100%, var(--shell));
  margin: 0 auto;
  padding: 0 16px;
}

.view { animation: ssUp .24s ease both; }

.grid-auto {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

:focus-visible {
  outline: 2px solid var(--summit-sunshine);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Rows that scroll sideways on a phone and simply fit on a desktop. */
.scroll-row {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  padding-bottom: 2px;
}
.scroll-row::-webkit-scrollbar { display: none; }