/* Remanence website. Tokens and rules follow remanence-design-system (system/tokens.json). */

@font-face { font-family: Poppins; src: url("assets/fonts/Poppins-Light.woff2") format("woff2"); font-weight: 300; font-style: normal; font-display: swap; }
@font-face { font-family: Poppins; src: url("assets/fonts/Poppins-Regular.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: Poppins; src: url("assets/fonts/Poppins-Medium.woff2") format("woff2"); font-weight: 500; font-style: normal; font-display: swap; }

:root {
  --surface-000: #ffffff;
  --surface-100: #f5f5f5;
  --surface-200: #e9e9e9;
  --surface-inverse: #000000;
  --ink: #000000;
  --ink-muted: #5c5c5c;
  --ink-faint: #6e6e6e;
  --ink-inverse: #ffffff;
  --line: #e0e0e0;
  --line-strong: #8c8c8c;
  --focus: #000000;

  --font-sans: Poppins, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, Menlo, "Courier New", monospace;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;

  --radius-sm: 2px;
  --radius-panel: 8px;
  --opacity-hover: 8%;
  --ease: cubic-bezier(0.2, 0, 0, 1);

  --gutter: clamp(16px, 5vw, 64px);
  --max-width: 1280px;
  --column-gap: var(--space-8);

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --surface-000: #000000;
    --surface-100: #0d0d0d;
    --surface-200: #1a1a1a;
    --surface-inverse: #ffffff;
    --ink: #ffffff;
    --ink-muted: #a8a8a8;
    --ink-faint: #7a7a7a;
    --ink-inverse: #000000;
    --line: #262626;
    --line-strong: #666666;
    --focus: #ffffff;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --surface-000: #000000;
  --surface-100: #0d0d0d;
  --surface-200: #1a1a1a;
  --surface-inverse: #ffffff;
  --ink: #ffffff;
  --ink-muted: #a8a8a8;
  --ink-faint: #7a7a7a;
  --ink-inverse: #000000;
  --line: #262626;
  --line-strong: #666666;
  --focus: #ffffff;
  color-scheme: dark;
}

/* Language: both versions live in the page, the root lang selects one. */
:root[lang="fr"] [lang="en"],
:root:not([lang="fr"]) [lang="fr"] { display: none !important; }

/* Base */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--surface-000);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 26px;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
h1, h2, h3, p, dl, dd { margin: 0; }
a { color: inherit; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; }
table { border-collapse: collapse; }
::selection { background: var(--ink); color: var(--ink-inverse); }
[hidden] { display: none !important; }

:where(a, button):focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

.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;
}
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: calc(-1 * var(--space-16));
  z-index: 10;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  background: var(--surface-inverse);
  color: var(--ink-inverse);
  font-size: 13px;
  line-height: 16px;
  font-weight: 500;
  text-decoration: none;
}
.skip-link:focus { top: var(--space-4); }

.wrap {
  width: 100%;
  max-width: calc(var(--max-width) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.label {
  color: var(--ink-muted);
  font-size: 11px;
  line-height: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

/* Top bar */
.topbar { border-bottom: 1px solid var(--line); }
.topbar__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-4) var(--space-6);
  padding-block: var(--space-6);
}
.brand { justify-self: start; display: block; color: var(--ink); border-radius: var(--radius-sm); }
.wordmark { width: 144px; max-width: none; height: auto; aspect-ratio: 6813 / 953; }

.nav { display: flex; align-items: center; gap: var(--space-2); }
.nav a,
.segmented button {
  padding: 10px calc(var(--space-3) - 0.18em) 10px var(--space-3);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--ink-muted);
  font-size: 11px;
  line-height: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
  cursor: pointer;
  transition: color 120ms linear, border-color 120ms linear, background-color 120ms linear;
}
.nav a:hover,
.segmented button:hover { color: var(--ink); background: color-mix(in srgb, var(--ink) var(--opacity-hover), transparent); }
.nav a[aria-current],
.segmented button[aria-pressed="true"] { color: var(--ink); border-color: var(--line-strong); background: var(--surface-100); }

.controls { justify-self: end; display: flex; align-items: center; gap: var(--space-4); }
.segmented { display: flex; gap: var(--space-1); }
.segmented button { padding-inline: calc(var(--space-2) + 0.09em) calc(var(--space-2) - 0.09em); }

.theme-toggle {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}
.theme-toggle__state { min-width: 6ch; color: var(--ink-muted); font-family: var(--font-mono); font-size: 11px; line-height: 16px; letter-spacing: 0.02em; text-align: right; }
.theme-toggle__state::before { content: "Light"; }
:root[data-theme="dark"] .theme-toggle__state::before { content: "Dark"; }
:root[lang="fr"] .theme-toggle__state::before { content: "Clair"; }
:root[lang="fr"][data-theme="dark"] .theme-toggle__state::before { content: "Sombre"; }
.theme-toggle__track { position: relative; width: 36px; height: 18px; border: 1px solid var(--line-strong); border-radius: 999px; }
.theme-toggle__track span { position: absolute; top: 3px; left: 3px; width: 10px; height: 10px; border-radius: 50%; background: var(--ink); transition: transform 120ms var(--ease); }
:root[data-theme="dark"] .theme-toggle__track span { transform: translateX(18px); }

:root:not(.js) .controls,
:root:not(.js) [data-copy] { display: none; }

/* Hero */
.hero {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--column-gap);
  align-items: center;
  padding-block: var(--space-16);
}
.hero__copy { grid-column: 1 / span 8; }
.hero h1 {
  font-size: 44px;
  line-height: 48px;
  font-weight: 300;
  letter-spacing: -0.02em;
}
.lead { max-width: 60ch; margin-top: var(--space-6); color: var(--ink-muted); }
.hero__symbol { grid-column: 10 / span 3; justify-self: end; width: 100%; max-width: 240px; }
.symbol { width: 100%; height: auto; }

/* The symbol follows the theme: black artwork on light grounds, white artwork on dark grounds. */
.symbol--dark { display: none; }
:root[data-theme="dark"] .symbol--light { display: none; }
:root[data-theme="dark"] .symbol--dark { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .symbol--light { display: none; }
  :root:not([data-theme]) .symbol--dark { display: block; }
}

/* Sections */
.section { padding-block: var(--space-16); border-top: 1px solid var(--line); }
.section__grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--column-gap);
  row-gap: var(--space-4);
  align-items: baseline;
}
.section__grid > h2 { grid-column: 1 / span 4; }
.section__body { grid-column: 5 / span 8; }
.section__body > p { max-width: 60ch; color: var(--ink-muted); }
.section h2 {
  font-size: 30px;
  line-height: 36px;
  font-weight: 500;
  letter-spacing: -0.015em;
}

/* Acquisition */
.methods {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-12);
}
.card {
  display: flex;
  flex-direction: column;
  padding: var(--space-6);
  border: 1px solid var(--line);
  border-radius: var(--radius-panel);
  background: var(--surface-100);
}
.card h3 { margin-top: var(--space-3); font-size: 20px; line-height: 28px; font-weight: 500; letter-spacing: -0.01em; }
.card__gloss { color: var(--ink-muted); font-size: 12px; line-height: 18px; }
.card__body { margin-block: var(--space-3) var(--space-6); color: var(--ink-muted); font-size: 14px; line-height: 22px; }
.card__data {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-4);
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--line);
}
.card__data dd { font-size: 14px; line-height: 22px; text-align: right; }

.coverage { width: 100%; margin-top: var(--space-12); }
.coverage th,
.coverage td { padding-block: var(--space-4); border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
.coverage thead th:not(:first-child),
.coverage td { width: 14%; text-align: center; }
.coverage tbody th { padding-right: var(--space-4); font-size: 14px; line-height: 22px; font-weight: 400; }
.mark { display: inline-block; width: 10px; height: 10px; border: 1px solid var(--line-strong); vertical-align: middle; }
.mark--yes { border-color: var(--ink); background: var(--ink); }

/* Vision */
.columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: var(--space-8);
  border-top: 1px solid var(--line);
}
.columns article { padding: var(--space-6) var(--space-6) 0; border-left: 1px solid var(--line); }
.columns article:first-child { padding-left: 0; border-left: 0; }
.columns article:last-child { padding-right: 0; }
.columns h3 { font-size: 20px; line-height: 28px; font-weight: 500; letter-spacing: -0.01em; }
.columns p { max-width: 44ch; margin-top: var(--space-3); color: var(--ink-muted); font-size: 14px; line-height: 22px; }

/* Contact */
.contact { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-4) var(--space-6); }
.email {
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition: text-decoration-color 120ms linear;
}
.email:hover { text-decoration-color: var(--ink); }
.button {
  display: inline-flex;
  align-items: center;
  padding: var(--space-3) var(--space-6);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  font-size: 13px;
  line-height: 16px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color 120ms linear;
}
.button--secondary { border-color: var(--line-strong); color: var(--ink); }
.button--secondary:hover { background: color-mix(in srgb, var(--ink) var(--opacity-hover), transparent); }

/* Footer */
.footer { border-top: 1px solid var(--line); }
.footer__inner { display: flex; justify-content: space-between; align-items: center; gap: var(--space-6); padding-block: var(--space-8) var(--space-12); }
.footer__mark { width: 128px; color: var(--ink); }
.footer__meta { color: var(--ink-muted); font-family: var(--font-mono); font-size: 11px; line-height: 16px; letter-spacing: 0.02em; }

/* Responsive */
@media (max-width: 959px) {
  .topbar__inner { grid-template-columns: 1fr auto; row-gap: var(--space-3); }
  .nav { grid-column: 1 / -1; order: 3; margin-inline: calc(-1 * var(--space-3)); }
}

@media (max-width: 900px) {
  .hero__copy { grid-column: 1 / span 8; }
  .hero__symbol { grid-column: 9 / span 4; }
  .section__grid { grid-template-columns: minmax(0, 1fr); }
  .section__grid > h2,
  .section__body { grid-column: 1 / -1; }
  .methods,
  .columns { grid-template-columns: minmax(0, 1fr); }
  .methods { gap: var(--space-4); }
  .card__body { max-width: 68ch; }
  .columns article { padding-inline: 0; border-left: 0; }
  .columns article + article { border-top: 1px solid var(--line); margin-top: var(--space-6); }
}

@media (max-width: 767px) {
  .topbar__inner { padding-block: var(--space-4); }
  .nav { justify-content: space-between; flex-wrap: wrap; gap: 0; margin-inline: calc(-1 * var(--space-2)); }
  .nav a { padding: 10px calc(var(--space-2) - 0.14em) 10px var(--space-2); font-size: 10px; letter-spacing: 0.14em; }
  .wordmark { width: 128px; }
  .controls { gap: var(--space-3); }
  .theme-toggle__state { display: none; }
  .hero { grid-template-columns: minmax(0, 1fr); row-gap: var(--space-8); padding-block: var(--space-12); }
  .hero__copy,
  .hero__symbol { grid-column: 1 / -1; }
  .hero__symbol { order: -1; justify-self: start; max-width: 128px; }
  .hero h1 { font-size: 32px; line-height: 38px; font-weight: 400; letter-spacing: -0.015em; }
  .section { padding-block: var(--space-12); }
  .section h2 { font-size: 24px; line-height: 30px; }
  .methods,
  .coverage { margin-top: var(--space-8); }
}

@media (max-width: 640px) {
  .coverage thead th:not(:first-child),
  .coverage td { width: 18%; }
  .footer__inner { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0s !important; }
}