/* =========================================================================
   schoolio.org — Design Tokens
   Drop this file into app/assets/stylesheets/ and @import "tokens";
   Pairs with brandAssets/STYLE-GUIDE.md.
   v0.1 — April 2026
   ========================================================================= */

/* --- Fonts (self-host WOFF2 in app/assets/fonts; stubs below) ---------- */

/*  Display serif — Fraunces (variable)                                    */
@font-face {
  font-family: "Fraunces";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("/assets/fonts/Fraunces-VariableFont_SOFT,WONK,opsz,wght.woff2")
       format("woff2-variations");
}
@font-face {
  font-family: "Fraunces";
  font-style: italic;
  font-weight: 100 900;
  font-display: swap;
  src: url("/assets/fonts/Fraunces-Italic-VariableFont_SOFT,WONK,opsz,wght.woff2")
       format("woff2-variations");
}

/*  Educating body sans — Source Sans 3                                    */
@font-face {
  font-family: "Source Sans 3";
  font-style: normal;
  font-weight: 200 900;
  font-display: swap;
  src: url("/assets/fonts/SourceSans3-VariableFont_wght.woff2")
       format("woff2-variations");
}
@font-face {
  font-family: "Source Sans 3";
  font-style: italic;
  font-weight: 200 900;
  font-display: swap;
  src: url("/assets/fonts/SourceSans3-Italic-VariableFont_wght.woff2")
       format("woff2-variations");
}

/*  Learning body serif — Source Serif 4                                   */
@font-face {
  font-family: "Source Serif 4";
  font-style: normal;
  font-weight: 200 900;
  font-display: swap;
  src: url("/assets/fonts/SourceSerif4-VariableFont_opsz,wght.woff2")
       format("woff2-variations");
}
@font-face {
  font-family: "Source Serif 4";
  font-style: italic;
  font-weight: 200 900;
  font-display: swap;
  src: url("/assets/fonts/SourceSerif4-Italic-VariableFont_opsz,wght.woff2")
       format("woff2-variations");
}

/*  Utility mono — IBM Plex Mono                                           */
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/assets/fonts/IBMPlexMono-Regular.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/assets/fonts/IBMPlexMono-SemiBold.woff2") format("woff2");
}

/* --- Custom properties -------------------------------------------------- */

:root {
  /* Color — core */
  --ink: #1C1C1C;
  --paper: #FBF6EA;
  --paper-2: #F3ECD6;
  --highlighter: #FFC107;
  --highlighter-soft: #FDE79A;
  --ink-blue: #1F3A63;
  --chalkboard: #2F4A3A;
  --chalk: #EDE9E2;
  --terracotta: #C46B5B;
  --terracotta-hover: #B05B4B;
  --rose: #F1D3CA;

  /* Color — semantic aliases */
  --bg: var(--paper);
  --fg: var(--ink);
  --link: var(--ink-blue);
  --link-underline: rgba(31, 58, 99, 0.35);
  --surface-card: var(--paper-2);
  --surface-chalkboard: var(--chalkboard);
  --cta-primary-bg: var(--terracotta);
  --cta-primary-fg: var(--paper);
  --cta-primary-bg-hover: var(--terracotta-hover);
  --focus-ring: var(--ink-blue);

  /* Typography — families */
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-educating: "Source Sans 3", system-ui, -apple-system, "Segoe UI",
                    Roboto, Helvetica, Arial, sans-serif;
  --font-learning: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo,
               Consolas, monospace;

  /* Typography — scale (1.250 major third, anchored at 16px) */
  --fs-12: 0.75rem;
  --fs-14: 0.875rem;
  --fs-16: 1rem;
  --fs-18: 1.125rem;
  --fs-20: 1.25rem;
  --fs-24: 1.5rem;
  --fs-30: 1.875rem;
  --fs-36: 2.25rem;
  --fs-48: 3rem;
  --fs-60: 3.75rem;
  --fs-72: 4.5rem;

  /* Typography — leading */
  --lh-tight: 1.05;
  --lh-snug: 1.2;
  --lh-normal: 1.45;
  --lh-body: 1.55;
  --lh-loose: 1.7;

  /* Spacing scale (px) */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 48px;
  --sp-8: 64px;
  --sp-9: 96px;
  --sp-10: 128px;

  /* Layout */
  --container-max: 1200px;
  --prose-max: 65ch;
  --gutter: clamp(24px, 4vw, 48px);

  /* Strokes and radii */
  --hairline: 1px solid var(--ink);
  --rule-heavy: 2px solid var(--ink);
  --radius-sm: 4px;
  --radius-md: 8px;

  /* Shadows (paper, not digital) */
  --shadow-paper: 4px 4px 0 0 rgba(28, 28, 28, 0.12);

  /* Motion */
  --ease-paper: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 140ms;
  --dur-med: 260ms;
}

/* --- Baseline ------------------------------------------------------------ */

html {
  color-scheme: light;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-educating);
  font-size: var(--fs-20);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Learning-column pages opt in by adding .col-learning to <body> or a section */
.col-learning {
  font-family: var(--font-learning);
  font-size: var(--fs-18);
  line-height: var(--lh-body);
}

/* --- Headings ------------------------------------------------------------ */

h1, h2, h3, h4, h5, h6,
.display {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: var(--lh-tight);
  color: var(--ink);
  margin: 0 0 var(--sp-4);
  /* Fraunces optical sizing */
  font-variation-settings: "opsz" 144;
}

h1, .h1 { font-size: var(--fs-60); }
h2, .h2 { font-size: var(--fs-48); line-height: var(--lh-snug); }
h3, .h3 { font-size: var(--fs-36); line-height: var(--lh-snug); }
h4, .h4 { font-size: var(--fs-30); line-height: var(--lh-snug); }
h5, .h5 { font-size: var(--fs-24); line-height: var(--lh-snug); }
h6, .h6 { font-size: var(--fs-20); line-height: var(--lh-snug); font-family: var(--font-mono); font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; font-size: var(--fs-14); }

/* Hero */
.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, var(--fs-72));
  line-height: var(--lh-tight);
  letter-spacing: -0.015em;
  font-variation-settings: "opsz" 144, "SOFT" 50;
}

/* --- Prose -------------------------------------------------------------- */

p {
  margin: 0 0 var(--sp-4);
  max-width: var(--prose-max);
}

a {
  color: var(--link);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: var(--link-underline);
  transition: text-decoration-color var(--dur-fast) var(--ease-paper);
}
a:hover { text-decoration-color: var(--link); }

strong { font-weight: 700; }
em { font-style: italic; }

blockquote {
  margin: var(--sp-5) 0;
  padding: var(--sp-4) var(--sp-5);
  background: var(--highlighter-soft);
  border-left: 4px solid var(--highlighter);
  font-family: var(--font-display);
  font-size: var(--fs-24);
  line-height: var(--lh-snug);
}

code, pre, .mono {
  font-family: var(--font-mono);
  font-size: 0.95em;
}

/* --- The signature highlight mark --------------------------------------- */
/*
 * Draws a hand-shaped yellow oval behind a run of inline text.
 * Use: <span class="highlight-mark">…</span>
 */
.highlight-mark {
  background:
    radial-gradient(
      ellipse 110% 85% at 50% 55%,
      var(--highlighter) 60%,
      rgba(255, 193, 7, 0.85) 72%,
      rgba(255, 193, 7, 0) 78%
    );
  padding: 0.08em 0.35em 0.18em;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

/* Reduced-motion users get a plain fill instead of animated stroke */
@media (prefers-reduced-motion: reduce) {
  .highlight-mark { background: var(--highlighter-soft); }
}

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

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

.prose {
  max-width: var(--prose-max);
  margin-inline: auto;
}

.paper {
  background: var(--paper);
  border-top: var(--hairline);
  padding: var(--sp-6) 0;
}

.paper-card {
  background: var(--paper-2);
  padding: var(--sp-6);
  box-shadow: var(--shadow-paper);
  border-radius: var(--radius-md);
}

.chalkboard-panel {
  background: var(--chalkboard);
  color: var(--chalk);
  padding: var(--sp-7) var(--sp-6);
}
.chalkboard-panel a { color: var(--highlighter); }

/* --- Two-Column signature block ----------------------------------------- */

.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-6);
  align-items: stretch;
}
.two-column > .col-educating {
  background: var(--rose);
  padding: var(--sp-6);
  border-radius: var(--radius-md);
}
.two-column > .col-learning {
  background: var(--chalkboard);
  color: var(--chalk);
  padding: var(--sp-6);
  border-radius: var(--radius-md);
  font-family: var(--font-learning);
}
.two-column .col-label {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--sp-3);
  opacity: 0.85;
}
@media (max-width: 720px) {
  .two-column { grid-template-columns: 1fr; }
}

/* --- Buttons ------------------------------------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-educating);
  font-size: var(--fs-16);
  font-weight: 600;
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  border: 1.5px solid transparent;
  transition: background var(--dur-fast) var(--ease-paper),
              color var(--dur-fast) var(--ease-paper),
              border-color var(--dur-fast) var(--ease-paper);
}

.btn-hope {
  background: var(--cta-primary-bg);
  color: var(--cta-primary-fg);
}
.btn-hope:hover { background: var(--cta-primary-bg-hover); }

.btn-secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}
.btn-secondary:hover { background: var(--highlighter-soft); }

.btn-ghost {
  background: transparent;
  color: var(--ink-blue);
  padding-inline: 0;
}

/* --- Nav ---------------------------------------------------------------- */

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-4) var(--gutter);
  background: var(--paper);
  border-bottom: var(--hairline);
}
.nav a { text-decoration: none; color: var(--ink); font-size: var(--fs-16); }
.nav a.is-active {
  background:
    radial-gradient(
      ellipse 110% 90% at 50% 60%,
      var(--highlighter) 55%,
      rgba(255, 193, 7, 0) 78%
    );
  padding: 0.15em 0.5em;
}

/* --- Forms (pen-and-paper) --------------------------------------------- */

.field {
  display: block;
  margin-bottom: var(--sp-5);
}
.field-label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--sp-2);
  color: var(--ink);
}
.field-input,
.field-textarea {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1.5px solid var(--ink);
  padding: var(--sp-2) 0;
  font-family: var(--font-educating);
  font-size: var(--fs-18);
  color: var(--ink);
  outline: none;
}
.field-input::placeholder,
.field-textarea::placeholder { color: rgba(28, 28, 28, 0.5); }
.field-input:focus,
.field-textarea:focus {
  border-bottom: 2.5px solid var(--ink-blue);
}

/* --- Cards, captions, labels ------------------------------------------- */

.mono-label {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
}

.caption {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--ink);
  opacity: 0.8;
  margin-top: var(--sp-2);
}

/* --- Oval portrait frame (for historical figures and team) ------------- */

.oval-frame {
  width: 160px;
  height: 200px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--ink);
  background: var(--paper-2);
}
.oval-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* --- Video embed block -------------------------------------------------- */

.video-embed {
  position: relative;
  background: var(--paper-2);
  padding: var(--sp-5);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-paper);
}
.video-embed::before,
.video-embed::after {
  /* paper "tabs" — two short vertical strokes on the left edge */
  content: "";
  position: absolute;
  left: -2px;
  width: 4px;
  background: var(--ink);
  border-radius: 0 2px 2px 0;
}
.video-embed::before { top: 24px; height: 28px; }
.video-embed::after  { top: 64px; height: 28px; }

.video-embed__frame {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  background: #000;
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.video-embed__frame iframe,
.video-embed__frame video {
  position: absolute; inset: 0; width: 100%; height: 100%; border: 0;
}
.video-embed__caption {
  margin-top: var(--sp-3);
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--ink);
}

/* --- FAQ accordion ------------------------------------------------------ */

.faq-item {
  border-bottom: var(--hairline);
  padding: var(--sp-5) 0;
}
.faq-q {
  font-family: var(--font-learning);
  font-size: var(--fs-20);
  font-weight: 600;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}
.faq-q::after {
  content: "+";
  font-family: var(--font-display);
  font-weight: 400;
  transition: transform var(--dur-med) var(--ease-paper);
}
.faq-item[open] .faq-q::after { content: "×"; }
.faq-a {
  font-family: var(--font-learning);
  font-size: var(--fs-18);
  line-height: var(--lh-body);
  color: var(--ink);
  margin-top: var(--sp-3);
  max-width: var(--prose-max);
}

/* --- Evidence strip ----------------------------------------------------- */

.evidence-strip {
  display: flex;
  gap: var(--sp-6);
  overflow-x: auto;
  padding: var(--sp-5) 0;
}
.evidence-strip .item {
  flex: 0 0 auto;
  text-align: center;
  width: 180px;
}
.evidence-strip .item .caption { margin-top: var(--sp-3); }

/* --- Focus ring (accessibility) ---------------------------------------- */

:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
  border-radius: 2px;
}

/* --- Utility: paper page container for long-form reading --------------- */

.page-paper {
  background: var(--paper);
  padding-block: var(--sp-8);
}
.page-paper .prose p { margin-bottom: var(--sp-5); }
.page-paper h2 { margin-top: var(--sp-7); }

/* --- Print: make it actually print like paper -------------------------- */

@media print {
  body { background: white; color: black; font-size: 11pt; }
  .nav, .btn, .video-embed { display: none; }
  a { color: black; text-decoration: underline; }
}