/* ==========================================================================
   ATLAS — BASE STYLES
   Reset + global defaults + accessibility baseline + shared components
   (buttons) that will be reused by future sections, not just the hero.
   ========================================================================== */

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

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img,
svg {
  display: block;
  max-width: 100%;
}

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

ul {
  list-style: none;
}

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

/* ---- Accessibility: respect reduced motion globally ---- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---- Accessibility: visible, consistent focus state ---- */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   Buttons — shared across the whole product, not just the hero
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  transition: background-color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background: var(--color-accent);
  color: #05060a;
}

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

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

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

.btn--ghost {
  background: transparent;
  color: var(--color-text-dim);
  border: 1px solid transparent;
  padding: var(--space-2) var(--space-3);
  font-size: 0.875rem;
}

.btn--ghost:hover {
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

.icon {
  width: 16px;
  height: 16px;
  fill: currentColor;
}