/* =========================================================
   Hairun Trading — Base Styles
   Reset + typography defaults + a11y utilities
   ========================================================= */

/* ---- Modern reset ----------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, ul, ol, fieldset {
  margin: 0;
  padding: 0;
}
ul, ol { list-style: none; }
img, picture, svg, video {
  display: block;
  max-width: 100%;
  height: auto;
}
button, input, select, textarea {
  font: inherit;
  color: inherit;
}
button { cursor: pointer; background: none; border: 0; padding: 0; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; border-spacing: 0; }
hr { border: 0; border-top: 1px solid currentColor; opacity: .15; }

/* ---- Document --------------------------------------- */
html {
  font-family: var(--hairun-font-family-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--hairun-color-neutral-700);
  background: var(--hairun-color-neutral-50);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1, "ss01" 1;
  background: var(--hairun-color-neutral-50);
  color: var(--hairun-color-neutral-700);
  display: flex;
  flex-direction: column;
}

main {
  flex: 1 0 auto;
}

/* ---- Headings --------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--hairun-font-family-display);
  font-weight: 700;
  color: var(--hairun-color-neutral-900);
  line-height: 1.15;
  letter-spacing: var(--hairun-letter-spacing-snug);
}
h1 { font-size: clamp(2.25rem, 5vw, var(--hairun-font-display-xl)); line-height: 1.05; letter-spacing: var(--hairun-letter-spacing-tight); }
h2 { font-size: clamp(1.875rem, 3.4vw, var(--hairun-font-display-lg)); }
h3 { font-size: clamp(1.5rem, 2.4vw, var(--hairun-font-display-md)); }
h4 { font-size: var(--hairun-font-display-sm); font-weight: 600; line-height: 1.2; }
h5 { font-size: 1.125rem; font-weight: 600; line-height: 1.3; }
h6 { font-size: 1rem; font-weight: 600; line-height: 1.3; }

/* ---- Body text -------------------------------------- */
p { font-size: 1rem; line-height: 1.65; color: var(--hairun-color-neutral-600); }
.lead { font-size: 1.25rem; line-height: 1.6; color: var(--hairun-color-neutral-600); }
.small { font-size: 0.875rem; line-height: 1.55; color: var(--hairun-color-neutral-500); }

strong, b { font-weight: 700; color: var(--hairun-color-neutral-800); }
em, i { font-style: italic; }
mark { background: var(--hairun-color-brand-gold); color: var(--hairun-color-brand-dark); padding: 0 0.25rem; border-radius: 2px; }

/* ---- Links ------------------------------------------ */
a {
  color: var(--hairun-color-brand-blue);
  transition: color var(--hairun-duration-fast) var(--hairun-ease-out-quart);
}
a:hover { color: var(--hairun-color-brand-gold); }

/* ---- Code blocks (rare) ----------------------------- */
code, kbd, samp {
  font-family: var(--hairun-font-family-mono);
  font-size: 0.875rem;
  background: var(--hairun-color-neutral-100);
  color: var(--hairun-color-neutral-800);
  padding: 0.125rem 0.375rem;
  border-radius: var(--hairun-radius-4);
}

/* ---- Eyebrow pattern -------------------------------- */
.eyebrow {
  display: inline-block;
  font: 500 0.75rem/1.5 var(--hairun-font-family-body);
  letter-spacing: var(--hairun-letter-spacing-eyebrow);
  text-transform: uppercase;
  color: var(--hairun-color-brand-gold);
  margin-bottom: var(--hairun-space-16);
}

/* ---- Focus ring ------------------------------------- */
:focus-visible {
  outline: 2px solid var(--hairun-color-brand-gold);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---- Selection -------------------------------------- */
::selection {
  background: var(--hairun-color-brand-gold);
  color: var(--hairun-color-brand-dark);
}

/* ---- Utility classes --------------------------------- */
.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;
}

.skip-link {
  position: absolute;
  top: 0;
  left: 0;
  z-index: var(--hairun-z-skiplink);
  padding: var(--hairun-space-12) var(--hairun-space-24);
  background: var(--hairun-color-brand-gold);
  color: var(--hairun-color-brand-dark);
  font-weight: 600;
  border-radius: 0 0 var(--hairun-radius-8) 0;
  transform: translateY(-100%);
  transition: transform var(--hairun-duration-fast) var(--hairun-ease-out-quart);
}
.skip-link:focus { transform: translateY(0); }

/* ---- Reveal helpers (initial state) ---------------- */
[data-reveal] {
  opacity: 0;
  transform: translate3d(0, 24px, 0);
  transition: opacity var(--hairun-duration-slow) var(--hairun-ease-out-quart),
              transform var(--hairun-duration-slow) var(--hairun-ease-out-quart);
  will-change: opacity, transform;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

/* ---- Decorative background ------------------------- */
.bg-dark  { background: var(--hairun-color-brand-dark);  color: var(--hairun-color-neutral-50); }
.bg-deep  { background: var(--hairun-color-brand-deep);  color: var(--hairun-color-neutral-50); }
.bg-warm  { background: var(--hairun-color-neutral-50); color: var(--hairun-color-neutral-700); }
.bg-soft  { background: var(--hairun-color-neutral-100); color: var(--hairun-color-neutral-700); }

/* ---- Reduced motion -------------------------------- */
@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;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
}