/* ===== Base & Typography – Amorismo ===== */

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

html {
  scroll-behavior: smooth;
}

body {
  color: var(--am-home-text);
  font-family: var(--am-font-sans);
  font-weight: 400;
  background-color: var(--am-home-bg);
  min-height: 100vh;
  overflow-x: hidden;
  /* offset for fixed nav */
  padding-top: var(--am-nav-h);
}

/* Home landing hero manages its own nav offset via negative margin */
body.am-body--home {
  padding-top: 0;
}

.am-skip-link {
  position: fixed;
  top: var(--am-sp-2);
  left: var(--am-sp-2);
  z-index: 200;
  padding: var(--am-sp-3) var(--am-sp-4);
  border-radius: var(--am-radius-sm);
  background: var(--am-home-accent);
  color: var(--am-on-accent);
  font-weight: 700;
  transform: translateY(calc(-100% - var(--am-sp-4)));
}

.am-skip-link:focus {
  color: var(--am-on-accent);
  transform: translateY(0);
}

/* Screen-reader only (visually hidden, accessible to AT) */
.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;
}

[id] {
  scroll-margin-top: calc(var(--am-nav-h) + var(--am-sp-4));
}

/* ===== Background decoration ===== */
/* Gradiente usa tokens dinámicos; cada body[data-vol] los sobreescribe */
.am-bg-gradient {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(
      circle at 30% 40%,
      var(--am-bg-grad-color-a) 0%,
      rgba(0, 0, 0, 0) 50%
    ),
    radial-gradient(
      circle at 75% 65%,
      var(--am-bg-grad-color-b) 0%,
      rgba(0, 0, 0, 0) 50%
    ),
    linear-gradient(
      to bottom,
      var(--am-home-bg) 0%,
      var(--am-bg-grad-bottom) 100%
    );
  pointer-events: none;
  z-index: -2;
}

/* Ambient photo layer — active only on Vol pages via tokens */
.am-bg-gradient::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--am-bg-photo) center / var(--am-bg-photo-size) no-repeat;
  opacity: var(--am-bg-photo-opacity);
  mix-blend-mode: var(--am-bg-photo-blend);
  filter: blur(var(--am-bg-photo-blur));
  transform: scale(var(--am-bg-photo-scale));
  pointer-events: none;
}

.am-bg-noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  opacity: var(--am-noise-opacity);
  background-image: url("../images/old_film_grain.png");
  background-position: center;
  background-size: 100% 100%;
  background-repeat: no-repeat;
  filter: var(--am-noise-filter, invert(1));
  mix-blend-mode: var(--am-noise-blend, screen);
}

/* ===== Typography ===== */
h1, h2, h3 {
  font-family: var(--am-font-title);
  font-weight: 500;
  color: var(--am-home-text);
  text-shadow: 0 0 20px var(--am-heading-shadow);
  margin: 0 0 var(--am-sp-4);
}

h1 {
  font-size: clamp(2rem, 6vw, 4rem);
  text-shadow: 0 0 30px var(--am-h1-shadow);
}

h2 {
  font-size: clamp(2.5rem, 6vw, 3.5rem);
}

h3 {
  font-size: 1.75rem;
  font-family: var(--am-font-sans);
  font-weight: 700;
  color: var(--am-home-text);
  text-shadow: none;
}

p {
  margin: 0 0 var(--am-sp-4);
  line-height: 1.7;
  font-size: 1.125rem;
  color: var(--am-home-text);
}

a {
  color: var(--am-home-text-muted);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--am-home-accent);
}

:focus-visible {
  outline: 3px solid var(--am-home-accent-soft);
  outline-offset: 3px;
}

/* ===== Layout ===== */
main {
  position: relative;
  z-index: 1;
}

.am-container {
  max-width: var(--am-max-w);
  margin: 0 auto;
  padding: var(--am-sp-6);
}

section {
  margin: 0;
  padding: 0;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}