/*
MathBoard
Copyright (C) 2026 Giacomo Bartoloni
SPDX-License-Identifier: AGPL-3.0-or-later
*/

/* Static information-site styles. The interactive Vue whiteboard has its own CSS. */

:root {
  --bg: #f9f9f9;
  --surface: #ffffff;
  --text: #2c3e50;
  --muted: #5b6572;
  --border: #e5e7eb;
  --accent: tan;
  --brand-dark: rgb(61, 61, 61);
  --focus: #2c3e50;
  --warm-surface: #fffaf2;
  --warm-border: #d9c5a9;
}

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

body {
  margin: 0;
  font-family: "Figtree", Avenir, Helvetica, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(ellipse 120% 80% at 0% 0%, rgba(210, 180, 140, 0.18), transparent 55%),
    radial-gradient(ellipse 90% 60% at 100% 0%, rgba(61, 61, 61, 0.06), transparent 50%),
    var(--bg);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--brand-dark);
}

a:hover {
  color: #000;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--brand-dark);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 100;
}

.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
}

.site-header,
.site-footer,
main {
  width: min(100% - 32px, 960px);
  margin-left: auto;
  margin-right: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0;
  flex-wrap: wrap;
}

@font-face {
  font-family: "Satisfy";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/seo/fonts/satisfy.woff2") format("woff2");
}

@font-face {
  font-family: "Figtree";
  font-style: normal;
  font-weight: 300 900;
  font-display: swap;
  src: url("/seo/fonts/figtree-latin-wght-normal.woff2") format("woff2");
}

.brand {
  /* Layout slot for the scaled badge (transform does not affect flow). */
  position: relative;
  display: block;
  flex-shrink: 0;
  width: 168px;
  height: 48px;
  text-decoration: none;
  color: inherit;
}

/*
 * Keep synchronized with src/App.vue `.logo`.
 * Differences that broke visual identity before:
 * - missing transform: scale(1.5)
 * - different font-size / line-height
 * - remote Google Fonts vs app font stack timing
 */
.brand .logo {
  font-family: "Satisfy", cursive;
  font-size: normal;
  /* Isolate from SEO body line-height: 1.6 (App.vue logo inherits browser normal). */
  line-height: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;

  color: whitesmoke;
  background-color: rgb(61, 61, 61);
  border-radius: 5px;
  padding: 5px 10px;
  border: tan 3px solid;

  position: absolute;
  z-index: 10;
  left: 0;
  top: 0;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-direction: row;
  flex-direction: row;
  z-index: 200;
  transform: scale(1.5);
  transform-origin: top left;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15),
              0 2px 4px rgba(0, 0, 0, 0.1);

  white-space: nowrap;
  margin: 0;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-header nav a:not(.button) {
  text-decoration: none;
  color: var(--muted);
}

.site-header nav a:not(.button):hover {
  color: var(--text);
}

main {
  padding: 0.5rem 0 3rem;
}

h1 {
  max-width: 24ch;
  font-size: clamp(2.3rem, 4.8vw, 3.25rem);
  font-weight: 760;
  line-height: 1.08;
  letter-spacing: -0.035em;
  text-wrap: balance;
  margin: 0 0 1.25rem;
  color: var(--brand-dark);
}

h2 {
  font-size: clamp(1.4rem, 2.6vw, 1.6rem);
  font-weight: 720;
  line-height: 1.22;
  letter-spacing: -0.02em;
  text-wrap: balance;
  margin: 2.5rem 0 0.75rem;
  color: var(--brand-dark);
}

.lede {
  font-size: clamp(1.1rem, 1.7vw, 1.25rem);
  font-weight: 450;
  line-height: 1.55;
  max-width: 62ch;
  margin-top: 0;
}

main p {
  text-wrap: pretty;
}

main > section {
  margin-top: 2.75rem;
}

main > section > h2 {
  margin-top: 0;
}

main > p:not(.cta-row),
main > section > p,
main > section > ul,
main > section > ol {
  max-width: 72ch;
}

main ul:not(.breadcrumbs) li + li,
main ol:not(.breadcrumbs) li + li {
  margin-top: 0.35rem;
}

::selection {
  background: var(--accent);
  color: var(--brand-dark);
}

.muted {
  color: var(--muted);
  font-size: 0.9rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.25rem 0 1.75rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.6rem 1.05rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
}

.button:hover {
  border-color: #d0d5dd;
}

.button-primary {
  background: var(--brand-dark);
  border-color: var(--brand-dark);
  color: #fff;
}

.button-primary:hover {
  color: #fff;
  filter: brightness(1.08);
}

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

.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 265px), 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.resource-card {
  display: block;
  padding: 1.35rem 1.45rem;
  background: var(--surface);
  border: 1px solid var(--warm-border);
  border-radius: 14px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.resource-card:hover {
  border-color: #bd9f7d;
  background: #fffcf7;
}

.resource-card h2,
.resource-card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.25rem;
  font-weight: 720;
  line-height: 1.25;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.resource-card p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.5;
}

.screenshot {
  margin: 1.5rem 0;
}

.screenshot img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.screenshot figcaption {
  margin-top: 0.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.formula-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr));
}

.formula-example {
  background: var(--surface);
  border: 1px solid var(--warm-border);
  border-radius: 14px;
  padding: 1.2rem;
}

.formula-label {
  margin: 0 0 0.65rem;
  color: var(--brand-dark);
  font-size: 1rem;
  font-weight: 700;
}

.formula-example pre {
  max-width: none;
  margin: 0 0 0.85rem;
  padding: 0.75rem;
  overflow-x: auto;
  background: #f5f2ed;
  border-radius: 6px;
  font-size: 0.9rem;
}

.formula-render {
  overflow-x: auto;
  padding: 1.1rem 0.5rem;
  border-radius: 8px;
  background-color: #fbfaf7;
  background-image:
    linear-gradient(rgba(61, 61, 61, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(61, 61, 61, 0.035) 1px, transparent 1px);
  background-size: 28px 28px;
}

.copy-latex {
  margin-top: 0.85rem;
  min-height: 40px;
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--warm-border);
  border-radius: 8px;
  background: var(--warm-surface);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
}

.copy-latex:hover {
  background: #f5eddf;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--warm-border);
  border-radius: 12px;
  background: var(--surface);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  text-align: left;
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th {
  background: #f5f0e8;
  color: var(--brand-dark);
  font-weight: 700;
}

tr:last-child td {
  border-bottom: none;
}

kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  padding: 0.15em 0.4em;
  border: 1px solid var(--warm-border);
  border-radius: 5px;
  background: var(--warm-surface);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.breadcrumbs li:not(:last-child)::after {
  content: "/";
  margin-left: 0.35rem;
  color: var(--border);
}

.site-footer {
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 0.75rem;
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--text);
}

.footer-note {
  margin: 0;
}

.not-found .cta-row {
  margin-top: 1.5rem;
}

main pre {
  max-width: 72ch;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  border: 1px solid var(--warm-border);
  border-radius: 10px;
  background: var(--warm-surface);
}

main :not(pre) > code {
  padding: 0.1em 0.3em;
  border-radius: 4px;
  background: #f5f0e8;
  overflow-wrap: anywhere;
}

pre code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.site-hero {
  margin: 0.5rem 0 3.5rem;
  padding: clamp(1.6rem, 4vw, 3.5rem);
  border: 1px solid #494540;
  border-radius: 24px;
  color: #f8f7f4;
  background-color: var(--editorial-ink);
  background-image:
    radial-gradient(circle at 94% 4%, rgba(210, 180, 140, 0.13), transparent 42%),
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: auto, 30px 30px, 30px 30px;
}

.site-hero--with-art {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  align-items: center;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.site-hero .lede {
  max-width: 56ch;
  margin: 0;
  color: #e1ded9;
  font-size: clamp(1.06rem, 1.75vw, 1.22rem);
  font-weight: 450;
  line-height: 1.6;
}

.site-hero .cta-row {
  margin: 1.5rem 0 0;
}

.site-hero .button-primary {
  border-color: #f7f4ee;
  background: #f7f4ee;
  color: var(--editorial-ink);
}

.site-hero .button-primary:hover {
  color: var(--brand-dark);
  background: #fff0da;
  filter: none;
}

.site-hero .button:not(.button-primary) {
  border-color: #9a9489;
  background: rgba(255, 255, 255, 0.055);
  color: #f7f4ee;
}

.site-hero .button:not(.button-primary):hover {
  border-color: #e1d5c6;
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

.site-hero .screenshot {
  margin: 0;
}

.site-hero .screenshot img {
  border: 5px solid #fff;
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.22);
}

.site-hero .screenshot figcaption {
  color: #eee5d8;
}

.reading-intro {
  margin: 0.5rem 0 2.7rem;
  padding: clamp(1.4rem, 3vw, 2rem);
  border: 1px solid #e3d9cb;
  border-radius: 20px;
  background: var(--editorial-bone);
}

.reading-intro .lede {
  margin-bottom: 0;
}

.reading-intro .cta-row {
  margin-bottom: 0;
}

.reading-intro .download-version {
  margin: 0.9rem 0 0;
}

.resource-group {
  margin-top: 2.5rem;
}

.resource-group > h2 {
  margin: 0;
}

.resource-grid--featured {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.resource-grid--featured .resource-card {
  min-height: 10.5rem;
  background: var(--warm-surface);
}

.resource-grid--featured .resource-card:hover {
  background: #fff8ed;
}

@media (max-width: 720px) {
  .site-hero--with-art,
  .resource-grid--featured {
    grid-template-columns: 1fr;
  }

  .resource-grid--featured .resource-card {
    min-height: 0;
  }

  .site-hero--with-art .screenshot {
    max-width: 480px;
  }
}

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
  }
}

/* Desktop distribution: readable download choices on small screens. */
.download-version {
  margin: 0.6rem 0 1.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 265px), 1fr));
  gap: 1rem;
  align-items: stretch;
  margin: 1.5rem 0;
}

.download-card,
.download-option {
  padding: 1.4rem;
  background: var(--surface);
  border: 1px solid var(--warm-border);
  border-radius: 14px;
}

.download-card h2,
.download-option h2 {
  margin: 0 0 0.65rem;
  font-size: 1.4rem;
  font-weight: 720;
  line-height: 1.22;
  letter-spacing: -0.02em;
}

.download-option .download-status {
  font-size: 0.875rem;
  font-weight: 700;
}

.download-option .cta-row {
  margin-bottom: 0;
}

.download-card > p:not(.download-actions):not(.download-platform) {
  color: var(--muted);
}

.download-platform {
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--brand-dark);
  margin: 0 0 0.5rem;
}

.download-actions {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.6rem;
  margin: 1rem 0;
}

.download-actions .button {
  text-align: center;
}

.download-options {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  margin: 1.5rem 0;
}

.download-status {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: #255e43;
}

.download-status-untested {
  color: #8a4c16;
}

.download-status-note {
  line-height: 1.5;
}

main > .download-status-note {
  max-width: none;
  padding: 0.85rem 1rem;
  border-radius: 8px;
  background: #f5f3ef;
}

.download-notice {
  padding: 1rem 1.25rem;
  margin: 2rem 0;
  border: 1px solid #c8b59b;
  border-radius: 8px;
  background: #fffaf1;
}

.download-notice a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

@media (max-width: 640px) {
  .download-card, .download-option { padding: 1rem; }
}

/* The desktop hub echoes the board's graph paper and chalkboard badge. */
.download-page {
  font-size: 1rem;
}

.download-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  align-items: center;
  gap: clamp(1.5rem, 4vw, 3rem);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  overflow: hidden;
  border: 2px solid var(--accent);
  border-radius: 16px;
  color: #f7f5f1;
  background-color: var(--brand-dark);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.055) 1px, transparent 1px);
  background-size: 28px 28px;
}

.download-hero .download-hero-lead {
  max-width: 25ch;
  margin: 0;
  font-size: clamp(1.6rem, 2.7vw, 2.15rem);
  font-weight: 720;
  line-height: 1.2;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.download-hero .lede {
  max-width: 47ch;
  margin: 1.15rem 0 0;
  font-size: clamp(1rem, 1.65vw, 1.1rem);
  font-weight: 450;
  line-height: 1.58;
}

.download-hero .download-version {
  margin: 1.25rem 0 0;
  color: #eee5d8;
  font-size: 0.875rem;
  font-weight: 600;
}

.download-hero a {
  color: #f6dbb3;
  text-underline-offset: 3px;
}

.download-hero a:hover {
  color: #fff;
}

.download-hero .screenshot {
  margin: 0;
}

.download-hero .screenshot img {
  border: 5px solid #fff;
  border-radius: 8px;
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.22);
}

.download-hero .screenshot figcaption {
  margin-top: 0.7rem;
  color: #eee5d8;
  font-size: 0.875rem;
  line-height: 1.45;
}

.download-choice-title {
  margin: 2.5rem 0 0;
  font-size: clamp(1.65rem, 3vw, 2rem);
  font-weight: 740;
  line-height: 1.18;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.download-page .download-grid {
  margin-top: 1rem;
}

.download-preflight {
  margin: 0.65rem 0 1.15rem;
  padding: 0.8rem 1rem;
  border: 1px solid var(--warm-border);
  border-radius: 8px;
  background: var(--warm-surface);
  line-height: 1.5;
}

.download-page .download-card {
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  border-radius: 14px;
}

.download-page .download-platform {
  color: #795a32;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-transform: none;
}

.download-page .download-card h3 {
  margin: 0 0 0.45rem;
  color: var(--brand-dark);
  font-size: 1.4rem;
  font-weight: 720;
  line-height: 1.22;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.download-page .download-card > p:not(.download-actions):not(.download-platform) {
  margin: 0.55rem 0;
  font-size: 1rem;
  line-height: 1.55;
}

.download-page .download-card > .download-status-note {
  padding: 0.65rem 0.75rem;
  border-radius: 6px;
  background: #f5f3ef;
  line-height: 1.5;
}

.download-page .download-status {
  font-size: 0.875rem;
  font-weight: 700;
}

.download-page .download-actions {
  margin: auto 0 0.75rem;
  padding-top: 1rem;
}

.download-page .download-actions .button {
  min-height: 44px;
  font-size: 1rem;
}

.download-page .download-card > a:last-child {
  margin-top: 0.25rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--border);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
}

.download-page .download-card > a:last-child:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.download-page .download-notice {
  border-left-width: 1px;
}

.download-followup {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2rem;
  margin-top: 2.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.download-followup h2 {
  margin-top: 1rem;
  font-size: 1.45rem;
  font-weight: 720;
  line-height: 1.22;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.download-followup p {
  max-width: 58ch;
}

.privacy-content {
  max-width: 800px;
}

.privacy-heading {
  margin-bottom: 3rem;
}

.privacy-heading h1 {
  margin-bottom: 0.5rem;
}

.privacy-heading .last-updated {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.privacy-content section {
  margin-top: 2.75rem;
}

.privacy-content section > h2,
.privacy-content .contact > h2 {
  margin-top: 0;
}

.privacy-content h3 {
  margin: 1.75rem 0 0.5rem;
  color: var(--brand-dark);
  font-size: 1.1rem;
  font-weight: 720;
  line-height: 1.3;
}

.privacy-content .highlight,
.privacy-content .contact {
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--warm-border);
  border-radius: 12px;
  background: var(--warm-surface);
}

.privacy-content .highlight {
  margin: 1.5rem 0;
}

.privacy-content .contact {
  margin-top: 2.75rem;
}

.privacy-content .contact p:last-child {
  margin-bottom: 0;
}

.privacy-back-link {
  margin-top: 2.5rem;
}

@media (max-width: 720px) {
  .download-hero,
  .download-followup {
    grid-template-columns: 1fr;
  }

  .download-hero .lede {
    max-width: 60ch;
  }

  .download-hero .screenshot {
    max-width: 480px;
  }

  .download-page .download-card {
    padding: 1.25rem;
  }
}

/*
 * Editorial download experiment: MathBoard's chalkboard and warm-paper identity,
 * guided by Dia's contrast, quiet typography and generous section rhythm.
 * Deliberately scoped to the hub, not its guides or the interactive board.
 */
.download-page--editorial .download-hero {
  grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  gap: clamp(1.7rem, 4vw, 3rem);
  padding: clamp(1.6rem, 4vw, 3.5rem);
  border: 1px solid #494540;
  border-radius: 24px;
  color: #f8f7f4;
  background-color: #292a28;
  background-image:
    radial-gradient(circle at 94% 4%, rgba(210, 180, 140, 0.13), transparent 42%),
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: auto, 30px 30px, 30px 30px;
}

.download-page--editorial .download-eyebrow {
  margin: 0 0 1.3rem;
  color: #e2bd91;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  line-height: 1.45;
  text-transform: uppercase;
}

.download-page--editorial .download-hero h1 {
  max-width: 13ch;
  margin: 0;
  color: #fffdf9;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.8rem, 5.1vw, 4.5rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

.download-page--editorial .download-hero .download-hero-lead {
  max-width: 26ch;
  margin: 1.45rem 0 0;
  font-size: clamp(1.2rem, 2vw, 1.45rem);
  font-weight: 560;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.download-page--editorial .download-hero .lede {
  max-width: 48ch;
  margin: 1rem 0 0;
  color: #d7d5d1;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.6;
}

.download-page--editorial .download-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin: 1.6rem 0 0;
}

.download-page--editorial .download-hero .button {
  min-height: 46px;
  border-radius: 20px;
  padding: 0.65rem 1.1rem;
  font-size: 0.95rem;
  font-weight: 650;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.download-page--editorial .download-hero .button-primary {
  border-color: #f7f4ee;
  background: #f7f4ee;
  color: #2b2c2b;
}

.download-page--editorial .download-hero .button-primary:hover {
  border-color: #e8d8c0;
  background: #e8d8c0;
  color: #2b2c2b;
}

.download-page--editorial .download-hero .button:focus-visible,
.download-page--editorial .download-hero a:not(.button):focus-visible {
  outline: 2px solid #ffffff;
  outline-offset: 3px;
}

/* Shared CTA helper uses primary styling; here the browser path is secondary. */
.download-page--editorial .download-hero-actions a[data-seo-cta="open-board"] {
  border-color: #9a9489;
  background: rgba(255, 255, 255, 0.055);
  color: #f7f4ee;
}

.download-page--editorial .download-hero-actions a[data-seo-cta="open-board"]:hover {
  border-color: #e1d5c6;
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

.download-page--editorial .download-hero .download-version {
  margin: 1.2rem 0 0;
  color: #cbc6be;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.5;
}

.download-page--editorial .download-hero a:not(.button) {
  color: #ead3ae;
}

.download-page--editorial .download-hero a:not(.button):hover {
  color: #ffffff;
}

.download-page--editorial .download-product-frame {
  min-width: 0;
  overflow: hidden;
  border: 1px solid #dedbd6;
  border-radius: 16px;
  background: #ffffff;
  box-shadow:
    0 2px 4px rgba(0, 0, 0, 0.1),
    0 18px 24px rgba(0, 0, 0, 0.12),
    0 32px 56px rgba(0, 0, 0, 0.18);
}

.download-page--editorial .download-product-frame-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  min-height: 38px;
  padding: 0.65rem 0.85rem;
  color: #646464;
  background: #f8f8f7;
  border-bottom: 1px solid #eae8e5;
  font-size: 0.72rem;
  font-weight: 600;
}

.download-page--editorial .download-product-frame-dots {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.download-page--editorial .download-product-frame-dots i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #d1cdc7;
}

.download-page--editorial .download-product-frame .screenshot {
  max-width: none;
  margin: 0;
}

.download-page--editorial .download-product-frame .screenshot img {
  width: 100%;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.download-page--editorial .download-product-frame .screenshot figcaption {
  margin: 0;
  padding: 0.9rem 1.1rem;
  color: #625f59;
  font-size: 0.8rem;
  line-height: 1.5;
}

.download-page--editorial .download-section-eyebrow {
  margin: 3.75rem 0 0.6rem;
  color: #72685d;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.77rem;
  letter-spacing: 0.11em;
  line-height: 1.4;
  text-transform: uppercase;
}

.download-page--editorial .download-choice-title {
  scroll-margin-top: 1.5rem;
  margin: 0;
  font-size: clamp(1.85rem, 3.5vw, 2.35rem);
  font-weight: 650;
  line-height: 1.2;
  letter-spacing: -0.04em;
}

.download-page--editorial .download-preflight {
  margin: 1.2rem 0 0;
  padding: 1rem 1.2rem;
  border: 1px solid #e3d4bf;
  border-left: 4px solid #aa8461;
  border-radius: 12px;
  background: #fffbf4;
}

.download-page--editorial .download-grid {
  gap: 1.15rem;
  margin: 1.4rem 0 0;
}

.download-page--editorial .download-card {
  border-color: #e1dbd4;
  border-radius: 16px;
  padding: 1.5rem;
  background: #ffffff;
  box-shadow: none;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.download-page--editorial .download-card:hover {
  border-color: #bb9c79;
  background: #fffcf7;
}

.download-page--editorial .download-platform {
  color: #6e6258;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  line-height: 1.4;
  text-transform: uppercase;
}

.download-page--editorial .download-card h3 {
  margin-top: 0.15rem;
  font-size: 1.5rem;
  font-weight: 650;
}

.download-page--editorial .download-card .button {
  border-radius: 20px;
}

.download-page--editorial .download-followup {
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: 3.75rem;
  padding-top: 1.5rem;
}

@media (max-width: 720px) {
  .download-page--editorial .download-hero {
    grid-template-columns: minmax(0, 1fr);
    padding: clamp(1.35rem, 5vw, 2.2rem);
    border-radius: 20px;
  }

  .download-page--editorial .download-hero h1 {
    max-width: 14ch;
  }

  .download-page--editorial .download-product-frame {
    width: 100%;
    max-width: 520px;
    margin: 0 auto;
  }
}

@media (max-width: 380px) {
  .download-page--editorial .download-hero-actions {
    flex-direction: column;
  }

  .download-page--editorial .download-hero-actions .button {
    width: 100%;
  }

  .download-page--editorial .download-card {
    padding: 1.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .download-page--editorial .download-hero .button,
  .download-page--editorial .download-card {
    transition: none;
  }
}


/*
 * Shared chalkboard/editorial language for all static MathBoard routes.
 * The downloadable beta hub retains its own scoped hero composition above.
 * These changes are visual only; documentation and release claims stay intact.
 */
:root {
  --bg: #f8f8f8;
  --text: #292a28;
  --muted: #625f5a;
  --border: #e1ddd7;
  --focus: #292a28;
  --editorial-ink: #292a28;
  --editorial-paper: #f8f8f8;
  --editorial-bone: #fffbf4;
  --editorial-line: #e1ddd7;
}

body {
  background: var(--editorial-paper);
}

/* Keep the original 960px content measure and pre-experiment header layout. */
.site-header {
  --text: #2c3e50;
  --muted: #5b6572;
  --focus: #2c3e50;
}

main {
  padding-top: 1.6rem;
  padding-bottom: 4.5rem;
}

main > h1,
.privacy-heading h1,
.not-found h1 {
  max-width: 19ch;
  margin: 0 0 1.45rem;
  color: var(--editorial-ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.75rem, 5.1vw, 4.5rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

main > section {
  margin-top: clamp(3rem, 6vw, 4.25rem);
}

main > section > h2 {
  margin-top: 0;
  font-size: clamp(1.65rem, 2.9vw, 2.25rem);
  font-weight: 650;
  line-height: 1.18;
  letter-spacing: -0.045em;
}

main > section > p,
main > section > ul,
main > section > ol {
  line-height: 1.7;
}

main .button,
.copy-latex {
  border-radius: 20px;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

main .button-primary:hover {
  filter: none;
  background: #2e2f2e;
}

.site-footer {
  margin-bottom: 2rem;
  padding: clamp(1.5rem, 3vw, 2.3rem);
  border: 1px solid #343632;
  border-radius: 20px;
  color: #d2ceca;
  background: var(--editorial-ink);
}

.site-footer nav {
  gap: 0.8rem 1.2rem;
}

.site-footer a {
  color: #e7e2dc;
}

.site-footer a:hover {
  color: #ffffff;
}

.site-footer a:focus-visible {
  outline-color: #ffffff;
}



.site-hero h1 {
  max-width: 14ch;
  margin: 0 0 1.35rem;
  color: #fffdf9;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.75rem, 5.1vw, 4.5rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

.editorial-eyebrow,
.reading-intro::before {
  display: block;
  margin: 0 0 1.2rem;
  color: #e2bd91;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  line-height: 1.4;
  text-transform: uppercase;
}



.site-hero .button {
  border-radius: 20px;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}



.site-hero .button-primary:hover {
  border-color: #e8d8c0;
  background: #e8d8c0;
  color: var(--editorial-ink);
}





.site-hero a:focus-visible {
  outline-color: #ffffff;
  outline-offset: 3px;
}

.site-hero--with-art .screenshot {
  min-width: 0;
  overflow: hidden;
  border: 1px solid #dedbd6;
  border-radius: 16px;
  background: #ffffff;
  box-shadow:
    0 2px 4px rgba(0, 0, 0, 0.1),
    0 18px 24px rgba(0, 0, 0, 0.12),
    0 32px 56px rgba(0, 0, 0, 0.18);
}

.site-hero--with-art .screenshot img {
  width: 100%;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.site-hero--with-art .screenshot figcaption {
  margin: 0;
  padding: 0.8rem 1rem;
  color: #625f59;
  background: #ffffff;
  font-size: 0.82rem;
  line-height: 1.5;
}



.reading-intro::before {
  content: "MathBoard / Guide";
  margin-bottom: 0.85rem;
  color: #79634c;
}

.privacy-heading::before {
  content: "MathBoard / Privacy";
}

.reading-intro .lede {
  max-width: 65ch;
  margin: 0;
  color: #4e4c49;
  font-size: clamp(1.05rem, 1.65vw, 1.17rem);
  line-height: 1.65;
}

.resource-group {
  counter-increment: editorial-chapter;
  margin-top: clamp(3.25rem, 6vw, 4.75rem);
}

.resource-group > h2 {
  margin: 0;
  font-size: clamp(1.65rem, 2.9vw, 2.25rem);
  font-weight: 650;
  letter-spacing: -0.045em;
}

.resource-group > h2::before {
  content: counter(editorial-chapter, decimal-leading-zero) " / Section";
  display: block;
  margin-bottom: 0.65rem;
  color: #6c645c;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.77rem;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.resource-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.1rem;
  margin-top: 1.3rem;
}

.resource-card,
.formula-example,
.download-option {
  border: 1px solid var(--editorial-line);
  border-radius: 16px;
  background: #ffffff;
  box-shadow: none;
}

.resource-card {
  padding: clamp(1.4rem, 2.4vw, 1.9rem);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}



.resource-card h2,
.resource-card h3 {
  font-weight: 650;
  font-size: clamp(1.2rem, 2vw, 1.4rem);
  letter-spacing: -0.035em;
}

.resource-grid--featured .resource-card {
  background: #fffcf7;
}



.formula-example {
  padding: 1.35rem;
}

.formula-label,
.download-option h2 {
  font-weight: 650;
  letter-spacing: -0.025em;
}

.copy-latex {
  background: #f5f1e9;
}

.copy-latex:hover {
  background: #eae1d4;
}

.table-wrap {
  border-color: var(--editorial-line);
  border-radius: 16px;
}

th {
  background: #f1eee8;
  font-weight: 650;
}

.download-option {
  padding: clamp(1.25rem, 2.6vw, 1.7rem);
}

.download-option .button {
  border-radius: 20px;
}

.not-found {
  margin-top: 2rem;
  margin-bottom: 4rem;
  padding: clamp(2rem, 5vw, 4rem);
  border: 1px solid #494540;
  border-radius: 24px;
  color: #e1ded9;
  background-color: var(--editorial-ink);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 30px 30px;
}

.not-found h1 {
  color: #fffdf9;
}

.not-found .button-primary {
  border-color: #f7f4ee;
  background: #f7f4ee;
  color: #292a28;
}

.not-found .button-primary:hover {
  background: #e8d8c0;
  color: #292a28;
}

@media (max-width: 720px) {
  .resource-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .site-hero {
    border-radius: 20px;
  }

}

@media (max-width: 440px) {

  main > h1,
  .privacy-heading h1,
  .not-found h1,
  .site-hero h1 {
    font-size: clamp(2.55rem, 10vw, 3.2rem);
  }

  .site-footer {
    padding: 1.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-hero .button,
  .resource-card,
  main .button,
  .copy-latex {
    transition: none;
  }
}