/**
 * Base styles — global elements, utility classes
 * All values reference tokens.css
 */

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: var(--leading-normal);
}

/* Container */
[class*="__container"],
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container--narrow { max-width: var(--container-md); }
.container--wide   { max-width: var(--container-max); }

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-text);
  line-height: var(--leading-tight);
}

h1 { font-size: var(--text-4xl); font-weight: var(--font-bold); }
h2 { font-size: var(--text-3xl); font-weight: var(--font-bold); }
h3 { font-size: var(--text-2xl); font-weight: var(--font-semibold); }
h4 { font-size: var(--text-xl);  font-weight: var(--font-semibold); }

/* Body links */
p a, li a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: var(--color-primary);
  text-underline-offset: 2px;
  transition: color var(--duration-fast) var(--ease-precision);
}
p a:hover, li a:hover {
  color: var(--e57-blue-dark);
}

/* Button */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  font-weight: var(--font-semibold);
  font-size: var(--text-base);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-precision);
  text-decoration: none;
}

.button--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.button--primary:hover {
  background: var(--e57-blue-dark);
}

.button--secondary {
  background: var(--color-secondary);
  color: var(--color-text-inverse);
}
.button--secondary:hover {
  background: var(--e57-green-dark);
}

.button--outline {
  background: transparent;
  color: var(--color-primary);
  border: var(--border-2) solid var(--color-primary);
}
.button--outline:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.button--ghost {
  background: transparent;
  color: var(--color-text-secondary);
}
.button--ghost:hover {
  background: var(--color-surface-2);
}

/* Focus ring — accessibility */
:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* Visually hidden but accessible */
.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;
}

/* Scroll reveal data attributes */
[data-reveal] {
  opacity: 0;
  transform: translateY(var(--reveal-distance));
  transition:
    opacity var(--reveal-duration) var(--reveal-easing),
    transform var(--reveal-duration) var(--reveal-easing);
}
[data-reveal="left"]  { transform: translateX(calc(var(--reveal-distance) * -1)); }
[data-reveal="right"] { transform: translateX(var(--reveal-distance)); }
[data-reveal="scale"] { transform: scale(0.9); }

[data-reveal].is-visible,
[data-reveal="left"].is-visible,
[data-reveal="right"].is-visible,
[data-reveal="scale"].is-visible {
  opacity: 1;
  transform: translate(0) scale(1);
}

/* Staggered children */
[data-reveal-stagger] > * {
  opacity: 0;
  transform: translateY(var(--reveal-distance));
  transition:
    opacity var(--reveal-duration) var(--reveal-easing),
    transform var(--reveal-duration) var(--reveal-easing);
}
[data-reveal-stagger].is-visible > *:nth-child(1) { transition-delay: calc(var(--reveal-stagger) * 0); }
[data-reveal-stagger].is-visible > *:nth-child(2) { transition-delay: calc(var(--reveal-stagger) * 1); }
[data-reveal-stagger].is-visible > *:nth-child(3) { transition-delay: calc(var(--reveal-stagger) * 2); }
[data-reveal-stagger].is-visible > *:nth-child(4) { transition-delay: calc(var(--reveal-stagger) * 3); }
[data-reveal-stagger].is-visible > *:nth-child(5) { transition-delay: calc(var(--reveal-stagger) * 4); }
[data-reveal-stagger].is-visible > *:nth-child(6) { transition-delay: calc(var(--reveal-stagger) * 5); }
[data-reveal-stagger].is-visible > * { opacity: 1; transform: translateY(0); }

/* Skeleton loading */
.skeleton {
  background: linear-gradient(90deg,
    var(--skeleton-base) 25%,
    var(--skeleton-shine) 37%,
    var(--skeleton-base) 63%);
  background-size: 200% 100%;
  animation: var(--animation-shimmer);
  border-radius: var(--radius-md);
}

/* Noise texture overlay */
.surface-textured { position: relative; isolation: isolate; }
.surface-textured::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--noise-fine);
  background-repeat: repeat;
  background-size: 256px 256px;
  mix-blend-mode: var(--noise-blend);
  pointer-events: none;
  z-index: 1;
}

/* Glass utility */
.glass {
  background: var(--glass-surface-1);
  backdrop-filter: var(--backdrop-standard);
  -webkit-backdrop-filter: var(--backdrop-standard);
  border: var(--glass-border);
  box-shadow: var(--glass-shadow);
}

/* Progressive image loading */
.progressive-img {
  background-size: cover;
  background-repeat: no-repeat;
  filter: blur(10px);
  transition: filter var(--duration-normal) var(--ease-out-3);
}
.progressive-img.loaded { filter: blur(0); }

/* Scroll progress bar */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--scroll-progress-height);
  background: var(--scroll-progress-color);
  transform-origin: left;
  z-index: var(--layer-tooltip);
  animation: scroll-grow linear both;
  animation-timeline: scroll(root);
}
@keyframes scroll-grow { from { transform: scaleX(0) } to { transform: scaleX(1) } }