/* Instructor home. Same type, colors and worksheet grid as the Practicing Strategy home page.
   Fonts are self-hosted (SIL OFL 1.1), so the page makes no third-party requests. */
@font-face { font-family: 'Young Serif'; src: url(fonts/young-serif-latin-400-normal.woff2) format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'Atkinson Next'; src: url(fonts/atkinson-hyperlegible-next-latin-400-normal.woff2) format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'Atkinson Next'; src: url(fonts/atkinson-hyperlegible-next-latin-700-normal.woff2) format('woff2'); font-weight: 700; font-display: swap; }

:root {
  --f-display: 'Young Serif', 'Iowan Old Style', Georgia, serif;
  --f-body: 'Atkinson Next', system-ui, 'Segoe UI', sans-serif;
  --paper: #f2f4f6; --panel: #ffffff; --ink: #131b2c; --ink-2: #4a5468; --rule: #d3d9e1;
  --grid: rgba(31, 59, 112, 0.05); --focus: #2458c6;
  --navy: #1f3b70; --navy-soft: #e3e9f4; --on-navy: #ffffff;
  --ochre: #8f6212; --ochre-soft: #f5ecdc;
  --teal: #0d6763; --teal-soft: #dcefed;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(19, 27, 44, 0.06), 0 6px 18px rgba(19, 27, 44, 0.06);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0e1420; --panel: #161e2d; --ink: #e8ecf3; --ink-2: #a9b3c4; --rule: #2a3547;
    --grid: rgba(143, 176, 234, 0.05); --focus: #8fb0ea;
    --navy: #8fb0ea; --navy-soft: #1c2940; --on-navy: #0d1422;
    --ochre: #e0b462; --ochre-soft: #2e2617;
    --teal: #5cc6bd; --teal-soft: #14302f;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 6px 18px rgba(0, 0, 0, 0.25);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0e1420; --panel: #161e2d; --ink: #e8ecf3; --ink-2: #a9b3c4; --rule: #2a3547;
  --grid: rgba(143, 176, 234, 0.05); --focus: #8fb0ea;
  --navy: #8fb0ea; --navy-soft: #1c2940; --on-navy: #0d1422;
  --ochre: #e0b462; --ochre-soft: #2e2617;
  --teal: #5cc6bd; --teal-soft: #14302f;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 6px 18px rgba(0, 0, 0, 0.25);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background-color: var(--paper);
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--ink);
  font: 400 1.0625rem/1.6 var(--f-body);
  overflow-x: hidden;
}
h1, h2, h3 { margin: 0; font-weight: 400; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
cite { font-style: italic; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 4px; }
.wrap { width: min(980px, 100% - 32px); margin-inline: auto; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 16px; top: -48px; padding: 8px 14px; background: var(--ink); color: var(--paper); border-radius: 6px; z-index: 10; }
.skip:focus { top: 12px; }

/* ---------- Top bar */
.top { border-bottom: 1px solid var(--rule); background: color-mix(in srgb, var(--paper) 88%, transparent); backdrop-filter: blur(6px); }
.top-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 60px; flex-wrap: wrap; }
.wordmark { font-family: var(--f-display); font-size: 1.25rem; text-decoration: none; letter-spacing: -0.01em; }
.crumb { color: var(--ink-2); font-size: 0.95rem; }

/* ---------- Head */
.head { padding: 48px 0 28px; display: grid; gap: 10px; }
.eyebrow { font-size: 0.9rem; color: var(--ink-2); letter-spacing: 0.02em; }
h1 { font-family: var(--f-display); font-size: clamp(2rem, 1.4rem + 2.2vw, 3rem); line-height: 1.05; letter-spacing: -0.02em; }

/* ---------- Your access */
.access { background: var(--panel); border: 1px solid var(--rule); border-left: 6px solid var(--navy); border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px 24px 20px; display: grid; gap: 10px; }
.access[data-tone="warn"] { border-left-color: var(--ochre); }
.access[data-tone="muted"] { border-left-color: var(--rule); }
.access h2 { font-family: var(--f-display); font-size: clamp(1.4rem, 1.1rem + 1vw, 1.9rem); line-height: 1.15; }
.access .who { color: var(--ink-2); font-weight: 700; margin-top: -4px; }
.access p { max-width: 68ch; }
.banner { margin-top: 6px; display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; padding: 12px 14px; border-radius: 8px; background: var(--ochre-soft); color: var(--ink); }
.license-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; color: var(--ink-2); font-size: 0.9rem; margin-top: 12px; }
.license-foot:empty { display: none; }
.card-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 6px; }

/* ---------- Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 8px 16px; border-radius: 8px; border: 1px solid var(--navy); background: var(--navy); color: var(--on-navy); font: 700 0.98rem/1.2 var(--f-body); text-decoration: none; cursor: pointer; }
.btn:hover { filter: brightness(1.08); }
.btn.quiet { background: transparent; color: var(--ink-2); border-color: var(--rule); font-weight: 400; }
.btn.quiet:hover { color: var(--ink); border-color: var(--ink-2); filter: none; }

/* ---------- Apps */
.apps { padding: 36px 0 8px; }
.apps h2, .how h2 { font-family: var(--f-display); font-size: clamp(1.4rem, 1.1rem + 1vw, 1.9rem); margin-bottom: 14px; }
.app-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.app { background: var(--panel); border: 1px solid var(--rule); border-radius: var(--radius); padding: 20px; display: grid; gap: 10px; align-content: start; }
.app h3 { font-family: var(--f-display); font-size: 1.3rem; line-height: 1.2; }
.app p { color: var(--ink-2); font-size: 0.97rem; }
.app .btn { justify-self: start; margin-top: 4px; }
.apps-note { color: var(--ink-2); }

/* ---------- How access works */
.how { padding: 40px 0 56px; }
.how-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 0 32px; border-top: 1px solid var(--ink); }
.how-list li { padding: 16px 0; border-bottom: 1px solid var(--rule); }
.how-list strong { display: block; margin-bottom: 4px; }
.how-list span { color: var(--ink-2); font-size: 0.97rem; }

/* ---------- Footer */
.foot { border-top: 1px solid var(--rule); padding: 40px 0 56px; background: var(--panel); }
.foot-inner { display: grid; gap: 8px; color: var(--ink-2); font-size: 0.95rem; }
.foot .wordmark { color: var(--ink); margin-bottom: 6px; }
.foot a { color: var(--ink); font-weight: 700; }
.fine { font-size: 0.85rem; }

@media (max-width: 560px) {
  .head { padding-top: 32px; }
  .access { padding: 20px 18px 18px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }