/* =========================================================================
   Global base styles — Human Centered Holdings
   ========================================================================= */

@import "tokens.css";

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

html {
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  font-feature-settings: "kern", "liga", "calt";
  transition: background-color var(--dur-base) var(--ease-standard),
    color var(--dur-base) var(--ease-standard);
  min-height: 100dvh;
  overflow-x: hidden;
}

::selection {
  background: var(--selection-bg);
}

/* --- Typography ---------------------------------------------------------- */
h1,
h2,
h3,
h4 {
  font-family: var(--font-serif);
  font-weight: 500;
  letter-spacing: var(--tracking-display);
  line-height: var(--lh-snug);
  color: var(--color-text);
  margin: 0;
  text-wrap: balance;
}

h1 {
  font-size: var(--fs-h1);
  line-height: var(--lh-tight);
}
h2 {
  font-size: var(--fs-h2);
}
h3 {
  font-size: var(--fs-h3);
}

p {
  margin: 0 0 var(--space-4);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
  transition: color var(--dur-fast) var(--ease-standard);
}

strong {
  font-weight: 600;
  color: var(--color-text);
}

em {
  font-style: italic;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

hr {
  border: none;
  border-top: var(--hairline) solid var(--color-border);
  margin: var(--space-7) 0;
}

ul,
ol {
  margin: 0 0 var(--space-4);
  padding-left: 1.2em;
}
li {
  margin-bottom: var(--space-2);
}

/* --- Accessibility ------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-xs);
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100%;
  z-index: 200;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  font-size: var(--fs-caption);
  font-weight: 600;
  transition: top var(--dur-fast) var(--ease-out);
}
.skip-link:focus {
  top: var(--space-4);
}

.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;
}

/* --- Layout primitives --------------------------------------------------- */
.container,
.container--narrow,
.container--wide {
  width: 100%;
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container {
  max-width: var(--container);
}
.container--narrow {
  max-width: var(--container-narrow);
}
.container--wide {
  max-width: var(--container-wide);
}

.section {
  padding-block: var(--section-pad);
}
.section--tight {
  padding-block: calc(var(--section-pad) * 0.62);
}

.measure {
  max-width: 38rem; /* ~62ch reading measure */
}
.measure-wide {
  max-width: 46rem;
}

/* --- Shared editorial elements ------------------------------------------- */
.eyebrow {
  font-family: var(--font-sans);
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}
.eyebrow--accent {
  color: var(--color-accent);
}

.lede {
  font-size: clamp(1.15rem, 1.02rem + 0.6vw, 1.4rem);
  line-height: 1.5;
  color: var(--color-text-muted);
  font-weight: 400;
}

.answer-line {
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  line-height: 1.4;
  color: var(--color-text);
  font-weight: 500;
}

.rule {
  border: none;
  border-top: var(--hairline) solid var(--color-border);
  margin: 0;
}

.plate-no {
  font-family: var(--font-sans);
  font-size: var(--fs-eyebrow);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--color-text-faint);
  font-variant-numeric: tabular-nums;
}

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

/* --- Photography: navy duotone, institutional register ------------------ */
.figure {
  position: relative;
  overflow: hidden;
  background: var(--color-surface-2);
  border: var(--hairline) solid var(--color-border);
  border-radius: var(--radius-md);
  isolation: isolate;
}
.figure > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(var(--img-grayscale)) contrast(1.02)
    brightness(var(--img-brightness));
  transition: filter 900ms var(--ease-out), transform 1400ms var(--ease-out);
}
.figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--img-tint);
  mix-blend-mode: var(--img-tint-blend);
  pointer-events: none;
  z-index: 1;
}
/* Reveal a whisper of colour on interactive figures. */
.figure--interactive > img {
  cursor: pointer;
}
.figure--interactive:hover > img,
a:hover .figure > img {
  filter: grayscale(35%) contrast(1.03) brightness(calc(var(--img-brightness) + 0.04));
  transform: scale(1.025);
}

.figure__plate {
  position: absolute;
  left: var(--space-4);
  bottom: var(--space-4);
  z-index: 2;
  font-family: var(--font-sans);
  font-size: var(--fs-eyebrow);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--parchment);
  background: rgba(15, 40, 64, 0.55);
  backdrop-filter: blur(2px);
  border: var(--hairline) solid rgba(242, 239, 231, 0.22);
  border-radius: var(--radius-xs);
  padding: 0.3rem 0.6rem;
}

figure {
  margin: 0;
}
.figcaption {
  margin-top: var(--space-3);
  font-size: var(--fs-caption);
  color: var(--color-text-faint);
  font-style: italic;
  font-family: var(--font-serif);
}

/* --- Reveal animation (subtle, < 300ms feel, no layout shift) ----------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}