/* ==========================================================================
   HARBOUR ONE GROUP: BASE
   Reset, global typography, layout primitives, accessibility.
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@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;
  }
}

body, h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, picture, svg, canvas { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }

html, body { height: 100%; }
body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  background: var(--surface-bg);
  color: var(--surface-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: var(--fw-regular);
  line-height: var(--lh-heading);
  letter-spacing: var(--ls-tight);
  color: inherit;
}

.dark-section {
  background: var(--surface-dark-bg);
  color: var(--surface-dark-text);
}
.dark-section .text-muted { color: var(--surface-dark-text-muted); }

.text-muted { color: var(--surface-text-muted); }

/* ---- Focus states (accessibility) ---- */
:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
}
a:focus-visible, button:focus-visible {
  border-radius: var(--radius-s);
}

/* ---- Skip link ---- */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -60px;
  background: var(--c-navy-deep);
  color: var(--c-off-white);
  padding: 0.85rem 1.25rem;
  z-index: 1000;
  transition: top var(--dur-fast) var(--ease-out);
  font-size: var(--fs-body-s);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
}
.skip-link:focus {
  top: 1rem;
}

/* ---- Layout primitives ---- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--section-pad-x);
}
.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding-block: var(--section-pad-y);
  position: relative;
}
.section--tight { padding-block: clamp(3rem, 4vw, 5rem); }

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

/* ---- Typography utility classes ---- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-body);
  font-size: var(--fs-eyebrow);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--c-accent);
}
.eyebrow::before {
  content: '';
  width: 28px;
  height: 1px;
  background: currentColor;
  display: block;
}

.display-xl { font-size: var(--fs-display-xl); line-height: var(--lh-tight); letter-spacing: var(--ls-tight); }
.display-l { font-size: var(--fs-display-l); line-height: var(--lh-tight); letter-spacing: var(--ls-tight); }
.display-m { font-size: var(--fs-display-m); line-height: 1.12; letter-spacing: var(--ls-tight); }
.heading-l { font-size: var(--fs-heading-l); }
.heading-m { font-size: var(--fs-heading-m); }
.heading-s { font-size: var(--fs-heading-s); font-family: var(--font-body); font-weight: var(--fw-semibold); }

.body-l { font-size: var(--fs-body-l); line-height: var(--lh-body); }
.body-s { font-size: var(--fs-body-s); }

.numeral {
  font-family: var(--font-display);
  font-variant-numeric: oldstyle-nums;
  color: var(--c-accent);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-body);
  font-size: var(--fs-body-s);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  padding: 1.05rem 1.75rem;
  border-radius: var(--radius-s);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
  white-space: nowrap;
}
.btn svg { width: 14px; height: 14px; flex-shrink: 0; transition: transform var(--dur-fast) var(--ease-out); }
.btn:hover svg { transform: translateX(3px); }

.btn--primary {
  background: var(--c-accent);
  color: var(--c-navy-deep);
  border-color: var(--c-accent);
}
.btn--primary:hover { background: var(--c-accent-light); border-color: var(--c-accent-light); }

.btn--ghost-dark {
  background: transparent;
  color: var(--c-off-white);
  border-color: var(--c-navy-line-strong);
}
.btn--ghost-dark:hover { border-color: var(--c-accent); color: var(--c-accent-light); }

.btn--ghost-light {
  background: transparent;
  color: var(--c-navy-deep);
  border-color: var(--c-grey-line-strong);
}
.btn--ghost-light:hover { border-color: var(--c-navy-deep); }

.btn--text {
  padding: 0;
  border: none;
  background: none;
  text-transform: none;
  letter-spacing: var(--ls-normal);
  font-size: var(--fs-body);
  font-weight: var(--fw-medium);
  border-bottom: 1px solid var(--c-accent-dim);
  border-radius: 0;
  padding-bottom: 2px;
}
.btn--text:hover { border-color: var(--c-accent); color: var(--c-accent); }

/* ---- Grid helpers ---- */
.grid { display: grid; gap: var(--grid-gap); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-12 { grid-template-columns: repeat(12, 1fr); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ---- Reveal-on-scroll (progressive enhancement; JS adds .is-visible) ---- */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }
.no-js [data-reveal], .no-anim [data-reveal] { opacity: 1; transform: none; }

/* ---- Hairline divider ---- */
.hr {
  border: none;
  border-top: 1px solid var(--surface-border);
}
.dark-section .hr { border-top-color: var(--surface-dark-border); }