/* ==========================================================================
   Votura: site styles

   The logo and palette come from data-brand on <html>. The site uses
   "tribar"; "monolith" and "blueprint" are kept so scripts/set-brand.sh can
   switch the whole site to another logo. A brand only swaps the logo mark and
   the color tokens below; layout and type are shared.
   ========================================================================== */

/* Fonts: self-hosted, SIL Open Font License 1.1 (see assets/fonts/OFL-*.txt) */
@font-face {
  font-family: "Sora";
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url("../fonts/sora-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Sora";
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url("../fonts/sora-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Source Serif 4";
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url("../fonts/source-serif-4-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Source Serif 4";
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url("../fonts/source-serif-4-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Source Serif 4";
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/source-serif-4-italic-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Source Serif 4";
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/source-serif-4-italic-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

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

/* Tribar (logo B): three-tone mark on midnight blue. The site's logo. */
:root {
  --field: #10112B;
  --field-deep: #0A0B1E;
  --on-field: #FFFFFF;
  --on-field-muted: rgb(255 255 255 / 0.78);
  --rule: rgb(255 255 255 / 0.14);
  --control-line: rgb(255 255 255 / 0.32);
  --accent: #5552FF;
  --highlight: #C3C8FF;

  --tri-1: #5552FF;
  --tri-2: #C3C8FF;
  --tri-3: #2B2AA6;

  /* Figure colors, read by main.js */
  --fig-point: rgb(195 200 255 / 0.55);
  --fig-vector: #C3C8FF;
  --fig-fill: rgb(85 82 255 / 0.4);
  --fig-ghost: rgb(195 200 255 / 0.5);

  --font-display: "Sora", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-text: "Source Serif 4", ui-serif, Georgia, Cambria, "Times New Roman", serif;

  --wrap: 75rem;
  --gutter: clamp(1rem, 4vw, 3rem);
  --section-space: clamp(4rem, 2.75rem + 5vw, 7rem);
  --radius: 4px;
}

/* Monolith (logo D): solid white mark on violet. */
:root[data-brand="monolith"] {
  --field: #5A2BF0;
  --field-deep: #4520C9;
  --on-field-muted: rgb(255 255 255 / 0.88);
  --rule: rgb(255 255 255 / 0.24);
  --control-line: rgb(255 255 255 / 0.5);
  --accent: #FFFFFF;
  --highlight: #DCD1FF;
  --fig-point: rgb(255 255 255 / 0.6);
  --fig-vector: #FFFFFF;
  --fig-fill: rgb(255 255 255 / 0.2);
  --fig-ghost: rgb(255 255 255 / 0.6);
}

/* Blueprint (logo E): white line mark on deep indigo. */
:root[data-brand="blueprint"] {
  --field: #2B1585;
  --field-deep: #1F0F66;
  --on-field-muted: rgb(255 255 255 / 0.8);
  --rule: rgb(255 255 255 / 0.16);
  --control-line: rgb(255 255 255 / 0.34);
  --accent: #B9A8FF;
  --highlight: #B9A8FF;
  --fig-point: rgb(255 255 255 / 0.55);
  --fig-vector: #FFFFFF;
  --fig-fill: rgb(185 168 255 / 0.26);
  --fig-ghost: rgb(255 255 255 / 0.5);
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */

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

html {
  background: var(--field);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  background: var(--field);
  color: var(--on-field);
  font-family: var(--font-text);
  font-size: 1.125rem;
  line-height: 1.6;
  font-kerning: normal;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 250ms ease;
}

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

a {
  color: var(--on-field);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 2px;
}

::selection {
  background: var(--highlight);
  color: var(--field);
}

:focus-visible {
  outline: 2px solid var(--on-field);
  outline-offset: 3px;
}

.wrap {
  width: min(100% - 2 * var(--gutter), var(--wrap));
  margin-inline: auto;
}

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

.skip-link {
  position: absolute;
  top: 0.75rem;
  left: var(--gutter);
  z-index: 30;
  padding: 0.625rem 1rem;
  border-radius: var(--radius);
  background: var(--on-field);
  color: var(--field);
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 600;
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: none;
}

/* --------------------------------------------------------------------------
   Logo lockup (inline SVG with all three marks; CSS shows the active one)
   -------------------------------------------------------------------------- */

.lockup .mark {
  display: none;
}

:root:not([data-brand]) .lockup .mark--tribar,
:root[data-brand="tribar"] .lockup .mark--tribar,
:root[data-brand="monolith"] .lockup .mark--monolith,
:root[data-brand="blueprint"] .lockup .mark--blueprint {
  display: inline;
}

.mark--blueprint path {
  fill: none;
  stroke: currentColor;
  stroke-width: 3.3;
  stroke-linejoin: round;
}

.mark--monolith path,
.lockup .wordmark {
  fill: currentColor;
}

.mark--tribar .t1 { fill: var(--tri-1); }
.mark--tribar .t2 { fill: var(--tri-2); }
.mark--tribar .t3 { fill: var(--tri-3); }

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

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 5.5rem;
}

.brand {
  display: inline-flex;
  padding-block: 0.5rem;
  border-radius: var(--radius);
  color: inherit;
}

.brand .lockup {
  width: auto;
  height: 2.25rem;
}

.site-nav ul {
  display: flex;
  gap: clamp(1.25rem, 3vw, 2.5rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  display: inline-block;
  padding-block: 0.75rem;
  color: var(--on-field-muted);
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--on-field);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.45em;
}

@media (max-width: 40rem) {
  .brand .lockup {
    height: 2rem;
  }
  .site-nav .optional {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero {
  padding-block: clamp(1.5rem, 0.5rem + 4vw, 4rem) var(--section-space);
}

.hero .wrap {
  display: grid;
  gap: clamp(3rem, 6vw, 4.5rem);
  align-items: center;
}

@media (min-width: 60rem) {
  .hero .wrap {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 1.5rem + 3.7vw, 4.25rem);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

.lead {
  max-width: 33em;
  margin: 1.75rem 0 0;
  color: var(--on-field-muted);
  font-size: clamp(1.1875rem, 1.1rem + 0.35vw, 1.375rem);
  line-height: 1.55;
  text-wrap: pretty;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 2.5rem 0 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.75rem 1.375rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 150ms ease, border-color 150ms ease;
}

.button-solid {
  background: var(--on-field);
  color: var(--field);
}

.button-solid:hover {
  background: var(--highlight);
}

.button-outline {
  border-color: var(--control-line);
  background: transparent;
  color: var(--on-field);
}

.button-outline:hover {
  border-color: var(--on-field);
}

/* The lattice figure */
.lattice-figure {
  margin: 0;
}

.lattice-frame {
  position: relative;
  width: 100%;
  max-width: 30rem;
  aspect-ratio: 1 / 1;
  margin-inline: auto;
}

.lattice-frame canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.lattice-figure figcaption {
  max-width: 30rem;
  margin: 0.75rem auto 0;
  color: var(--on-field-muted);
  font-size: 0.9375rem;
  font-style: italic;
  text-align: center;
}

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */

.section {
  padding-bottom: var(--section-space);
}

.section .wrap {
  display: grid;
  gap: 2rem clamp(2rem, 5vw, 4rem);
  padding-top: var(--section-space);
  border-top: 1px solid var(--rule);
}

@media (min-width: 60rem) {
  .section .wrap {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }
}

.section h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 1.35rem + 1.4vw, 2.375rem);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.card-list {
  display: grid;
  gap: 2.75rem clamp(2rem, 4vw, 3.5rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 40rem) {
  .card-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.card-list li::before {
  content: "";
  display: block;
  width: 2.25rem;
  height: 3px;
  margin-bottom: 1.25rem;
  background: var(--accent);
}

.card-list h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.card-list p {
  margin: 0;
  color: var(--on-field-muted);
  text-wrap: pretty;
}

/* Contact */
.contact-lead {
  max-width: 32em;
  margin: 0;
  color: var(--on-field-muted);
  font-size: clamp(1.1875rem, 1.1rem + 0.35vw, 1.375rem);
  line-height: 1.55;
  text-wrap: pretty;
}

.contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.5rem;
  margin: 2rem 0 0;
}

.email {
  color: var(--on-field);
  font-family: var(--font-display);
  font-size: clamp(1.625rem, 0.85rem + 3.6vw, 3.25rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.025em;
  text-decoration: underline;
  text-decoration-color: var(--control-line);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.2em;
  overflow-wrap: anywhere;
}

.email:hover {
  text-decoration-color: currentColor;
  text-decoration-thickness: 2px;
}

.copy {
  min-width: 9.5rem;
}

.copy[hidden] {
  display: none;
}

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

.site-footer {
  padding-block: 3rem;
  background: var(--field-deep);
  color: var(--on-field-muted);
  font-size: 0.9375rem;
  line-height: 1.55;
  transition: background-color 250ms ease;
}

.site-footer .wrap {
  display: grid;
  gap: 1.5rem 3rem;
  align-items: start;
}

@media (min-width: 60rem) {
  .site-footer .wrap {
    grid-template-columns: minmax(0, 4fr) minmax(0, 5fr) minmax(0, 3fr);
  }
}

.site-footer .brand {
  padding-block: 0;
}

.site-footer .lockup {
  width: auto;
  height: 1.75rem;
}

.site-footer p {
  max-width: 30em;
  margin: 0;
}

@media (min-width: 60rem) {
  .footer-meta {
    justify-self: end;
    text-align: right;
  }
}

/* --------------------------------------------------------------------------
   404
   -------------------------------------------------------------------------- */

.not-found {
  padding-block: clamp(3rem, 2rem + 6vw, 7rem) clamp(5rem, 3rem + 8vw, 9rem);
}

.not-found .big-mark {
  width: clamp(6rem, 4rem + 8vw, 9rem);
  height: auto;
  margin-bottom: 2.5rem;
}

.not-found h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 1.5rem + 3vw, 3.5rem);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.not-found p {
  max-width: 32em;
  margin: 1.25rem 0 0;
  color: var(--on-field-muted);
  font-size: 1.25rem;
  line-height: 1.55;
}

/* --------------------------------------------------------------------------
   Preferences and print
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}

@media print {
  html,
  body,
  .site-footer {
    background: none;
    color: #000;
  }
  .site-nav,
  .actions,
  .lattice-figure,
  .copy,
  .skip-link {
    display: none;
  }
  .lead,
  .contact-lead,
  .card-list p,
  .site-footer {
    color: #000;
  }
}