/* ==========================================================================
   Base — reset, typography, utility classes
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  color-scheme: light;
}

html[data-theme="dark"] {
  color-scheme: dark;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
  transition: background-color var(--duration-base) var(--ease-standard),
              color var(--duration-base) var(--ease-standard);
}

:lang(ar) {
  font-family: var(--font-arabic);
}

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

a {
  color: inherit;
}

ul, ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--lh-tight);
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-sm);
  color: var(--color-text);
}

:lang(ar) h1, :lang(ar) h2, :lang(ar) h3, :lang(ar) h4, :lang(ar) h5, :lang(ar) h6 {
  font-family: var(--font-arabic);
  letter-spacing: 0;
}

h1 { font-size: var(--fs-5xl); font-weight: 700; }
h2 { font-size: var(--fs-3xl); font-weight: 700; }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-lg); }

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

/* ---- Layout primitives ------------------------------------------------- */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.container-narrow {
  max-width: var(--container-narrow);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

main { display: block; }

section {
  padding-block: var(--section-padding-y);
  position: relative;
}

/* ---- Accessibility utilities -------------------------------------------- */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  inset-inline-start: var(--space-sm);
  top: -60px;
  z-index: var(--z-toast);
  background: var(--color-primary);
  color: #fff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  transition: top var(--duration-fast) var(--ease-standard);
}

.skip-link:focus {
  top: var(--space-sm);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---- Text utilities ------------------------------------------------------*/
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.text-gradient {
  background: var(--gradient-vivid);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.lead {
  font-size: var(--fs-lg);
  line-height: var(--lh-relaxed);
  color: var(--color-text-muted);
}

/* ---- Reduced motion ------------------------------------------------------*/
@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;
    scroll-behavior: auto !important;
  }
}

/* ---- High contrast -------------------------------------------------------*/
@media (prefers-contrast: high) {
  .card, .surface {
    border-width: 2px;
  }
}