/* ==========================================================================
   MUDDL. — independent design studio
   Design system: type, colour, grid, rhythm, interaction
   ========================================================================== */

/* --- Tokens --------------------------------------------------------------- */

:root {
  /* Colour */
  --ink: #111111;
  --paper: #f5f2ec;
  --clay: #943c0b;

  /* Burnt Clay as supplied. On dark grounds it is tinted toward the warm
     white so it clears the contrast threshold at display sizes. */
  --accent: var(--clay);
  --accent-on-dark: #a3572d;

  --ink-70: rgba(17, 17, 17, 0.7);
  --ink-46: rgba(17, 17, 17, 0.6);
  --ink-14: rgba(17, 17, 17, 0.14);
  --ink-08: rgba(17, 17, 17, 0.08);

  --paper-70: rgba(245, 242, 236, 0.7);
  --paper-46: rgba(245, 242, 236, 0.56);
  --paper-16: rgba(245, 242, 236, 0.16);
  --paper-08: rgba(245, 242, 236, 0.08);

  /* Page-level surface, flipped by [data-surface="ink"] */
  --fg: var(--ink);
  --bg: var(--paper);
  --fg-70: var(--ink-70);
  --fg-46: var(--ink-46);
  --fg-14: var(--ink-14);
  --fg-08: var(--ink-08);

  /* Measure and gutters */
  --shell: 1680px;
  --gutter: clamp(1.25rem, 4.4vw, 5rem);
  --col-gap: clamp(1rem, 2vw, 2.25rem);

  /* Vertical rhythm — space enough to separate, not so much it reads as a gap */
  --band: clamp(4.25rem, 7.5vh + 3vw, 9rem);
  --band-tight: clamp(3rem, 5vh + 2vw, 5.5rem);

  /* Type */
  --font: 'Archivo', 'Helvetica Neue', Helvetica, Arial, sans-serif;

  --t-display: clamp(3.4rem, 12.2vw, 12rem);
  --t-statement: clamp(2rem, 5.6vw, 5.4rem);
  --t-head: clamp(1.75rem, 3.6vw, 3.5rem);
  --t-lede: clamp(1.15rem, 1.9vw, 1.75rem);
  --t-body: clamp(1rem, 0.55vw + 0.85rem, 1.1875rem);
  --t-small: 0.8125rem;
  --t-label: 0.6875rem;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --slow: 900ms;
  --mid: 520ms;
  --fast: 260ms;
}

[data-surface='ink'] {
  --accent: var(--accent-on-dark);
  --fg: var(--paper);
  --bg: var(--ink);
  --fg-70: var(--paper-70);
  --fg-46: var(--paper-46);
  --fg-14: var(--paper-16);
  --fg-08: var(--paper-08);
}

/* --- Reset ---------------------------------------------------------------- */

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: var(--t-body);
  font-weight: 400;
  line-height: 1.5;
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1,
h2,
h3,
h4,
p,
figure,
blockquote,
ul,
ol {
  margin: 0;
  padding: 0;
}

ul,
ol {
  list-style: none;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

::selection {
  background: var(--clay);
  color: var(--paper);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  background: var(--ink);
  color: var(--paper);
  font-size: var(--t-label);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  transform: translateY(-120%);
  transition: transform var(--fast) var(--ease);
}

.skip:focus {
  transform: translateY(0);
}

/* --- Layout --------------------------------------------------------------- */

.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--col-gap);
}

.band {
  padding-block: var(--band);
}

.band--tight {
  padding-block: var(--band-tight);
}

.surface {
  background: var(--bg);
  color: var(--fg);
}

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: var(--fg-14);
}

/* --- Type ----------------------------------------------------------------- */

.display {
  font-size: var(--t-display);
  font-weight: 700;
  font-stretch: 104%;
  line-height: 0.82;
  letter-spacing: -0.045em;
  text-transform: uppercase;
}

.statement {
  font-size: var(--t-statement);
  font-weight: 600;
  font-stretch: 100%;
  line-height: 0.98;
  letter-spacing: -0.035em;
}

.head {
  font-size: var(--t-head);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -0.03em;
}

.lede {
  font-size: var(--t-lede);
  font-weight: 400;
  line-height: 1.34;
  letter-spacing: -0.017em;
  text-wrap: pretty;
}

.body {
  font-size: var(--t-body);
  line-height: 1.58;
  letter-spacing: -0.005em;
  color: var(--fg-70);
  text-wrap: pretty;
}

.body + .body {
  margin-top: 1.25em;
}

.label {
  font-size: var(--t-label);
  font-weight: 500;
  font-stretch: 92%;
  line-height: 1.2;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.label--muted {
  color: var(--fg-46);
}

.small {
  font-size: var(--t-small);
  line-height: 1.45;
  letter-spacing: 0.01em;
}

.measure {
  max-width: 46ch;
}

.measure-wide {
  max-width: 62ch;
}

/* Section marker: hairline + label, the site's recurring index device */
.marker {
  display: flex;
  align-items: baseline;
  gap: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--fg-14);
}

.marker__index {
  font-variant-numeric: tabular-nums;
  color: var(--fg-46);
}

/* --- Header --------------------------------------------------------------- */

.masthead {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 60;
  padding-block: clamp(1rem, 1.6vw, 1.75rem);
  mix-blend-mode: normal;
  transition: transform var(--mid) var(--ease), background-color var(--mid) linear,
    color var(--mid) linear;
}

.masthead--hidden {
  transform: translateY(-101%);
}

.masthead--tucked {
  background: var(--bg);
  border-bottom: 1px solid var(--fg-14);
}

.masthead__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.masthead__mark {
  display: block;
  width: clamp(104px, 9vw, 132px);
}

.masthead__mark img {
  width: 100%;
  height: auto;
}

.masthead__mark .mark--ink {
  display: block;
}

.masthead__mark .mark--paper {
  display: none;
}

[data-surface='ink'] .masthead__mark .mark--ink,
.masthead--on-ink .masthead__mark .mark--ink {
  display: none;
}

[data-surface='ink'] .masthead__mark .mark--paper,
.masthead--on-ink .masthead__mark .mark--paper {
  display: block;
}

.masthead--on-ink {
  --accent: var(--accent-on-dark);
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 2.6vw, 3rem);
}

.nav__link {
  position: relative;
  padding-block: 0.35rem;
}

.nav__link::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--mid) var(--ease);
}

.nav__link:hover::after,
.nav__link:focus-visible::after,
.nav__link[aria-current='page']::after {
  transform: scaleX(1);
}

/* --- Links ---------------------------------------------------------------- */

.link {
  position: relative;
  display: inline-block;
  transition: color var(--fast) linear;
}

.link::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.18em;
  height: 1px;
  background: currentColor;
  opacity: 0.28;
  transition: opacity var(--fast) linear, background-color var(--fast) linear;
}

.link:hover,
.link:focus-visible {
  color: var(--accent);
}

.link:hover::after,
.link:focus-visible::after {
  opacity: 1;
  background: var(--accent);
}

[data-surface='ink'] .link:hover,
[data-surface='ink'] .link:focus-visible {
  color: var(--paper);
}

[data-surface='ink'] .link:hover::after,
[data-surface='ink'] .link:focus-visible::after {
  background: var(--accent);
  opacity: 1;
}

/* Arrow link — used for back / forward navigation between pages */
.arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}

.arrow__line {
  display: block;
  width: 2.5rem;
  height: 1px;
  background: currentColor;
  transform-origin: left;
  transition: transform var(--mid) var(--ease), background-color var(--fast) linear;
}

.arrow:hover .arrow__line,
.arrow:focus-visible .arrow__line {
  transform: scaleX(1.5);
  background: var(--accent);
}

.arrow--back .arrow__line {
  transform-origin: right;
}

/* --- Media ---------------------------------------------------------------- */

.media {
  position: relative;
  overflow: hidden;
  background: var(--fg-08);
}

.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media--tall {
  aspect-ratio: 4 / 5;
}

.media--portrait {
  aspect-ratio: 3 / 4;
}

.media--square {
  aspect-ratio: 1 / 1;
}

.media--landscape {
  aspect-ratio: 3 / 2;
}

.media--wide {
  aspect-ratio: 16 / 9;
}

.media--pano {
  aspect-ratio: 21 / 9;
}

figure figcaption {
  margin-top: 0.9rem;
  color: var(--fg-46);
}

/* --- Reveal --------------------------------------------------------------- */

[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--slow) var(--ease), transform var(--slow) var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}

[data-reveal].is-in {
  opacity: 1;
  transform: none;
}

[data-reveal='media'] {
  opacity: 1;
  transform: none;
  clip-path: inset(0 0 12% 0);
  transition: clip-path var(--slow) var(--ease);
}

[data-reveal='media'].is-in {
  clip-path: inset(0 0 0 0);
}

[data-reveal='media'] img {
  transform: scale(1.06);
  transition: transform 1400ms var(--ease);
}

[data-reveal='media'].is-in img {
  transform: scale(1);
}

/* --- Footer --------------------------------------------------------------- */

.footer {
  padding-block: var(--band-tight) clamp(1.5rem, 3vw, 2.5rem);
}

.footer__mail {
  font-size: clamp(1.6rem, 4.4vw, 3.75rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1;
  word-break: break-word;
}

.footer__grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.5rem 2.5rem;
  margin-top: clamp(2.5rem, 6vw, 5rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--fg-14);
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

/* Social destinations were not supplied with the project files.
   These render as plain text until URLs are provided. */
.footer__pending {
  color: var(--fg-46);
}

/* --- Reduced motion ------------------------------------------------------- */

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
    clip-path: none;
  }

  [data-reveal] img {
    transform: none;
  }
}

/* --- Pointer tag ---------------------------------------------------------- */

.pointer-tag {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 80;
  padding: 0.8rem 1.05rem;
  background: var(--clay);
  color: var(--paper);
  font-size: var(--t-label);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transform-origin: center;
  transition: opacity var(--fast) linear, scale var(--mid) var(--ease);
  scale: 0.6;
}

.pointer-tag.is-on {
  opacity: 1;
  scale: 1;
}

/* --- Masthead on small screens -------------------------------------------- */

@media (max-width: 560px) {
  .masthead {
    padding-block: 0.9rem;
  }

  .masthead__mark {
    width: 82px;
  }

  .nav {
    gap: 0.95rem;
  }

  .nav .nav__link {
    font-size: 0.625rem;
    letter-spacing: 0.14em;
  }
}

/* --- Mobile rhythm: shorter bands, so pacing stays deliberate ------------- */

@media (max-width: 700px) {
  :root {
    --band: clamp(3.5rem, 6.5vh + 3vw, 6rem);
    --band-tight: clamp(2.5rem, 4.5vh + 2vw, 4.5rem);
  }
}

/* Two sections on the same ground need one gap between them, not two. Where
   the ground changes, the full band stays — the colour break earns it. */
.band:not(.surface) + .band:not(.surface) {
  padding-top: calc(var(--band) * 0.5);
}