/* Torah Foundations, Unit 1. A study guide: one column, quiet, made for reading. */

:root {
  --paper: #FBF9F4;
  --ink: #221F1A;
  --soft: #6A6259;
  --rule: #E3DED2;
  --rule-soft: #EEEAE0;
  --accent: #33566B;
  --tint: #F3F0E8;
  --measure: 42rem;
}

:root[data-theme="dark"] {
  --paper: #171613;
  --ink: #E9E4DA;
  --soft: #9E968A;
  --rule: #34302A;
  --rule-soft: #262320;
  --accent: #9FBDCE;
  --tint: #201E1A;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 4.5rem; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Crimson Pro", Georgia, "Times New Roman", serif;
  font-size: 1.1875rem;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-weight: 600; line-height: 1.25; margin: 0 0 .5rem; letter-spacing: -.005em; }
h1 { font-size: 2.125rem; }
h2 { font-size: 1.625rem; margin-top: 0; }
h3 { font-size: 1.1875rem; font-weight: 600; margin-top: 2rem; }

p { margin: 0 0 1rem; max-width: var(--measure); }
ul, ol { max-width: var(--measure); }
a { color: var(--accent); text-underline-offset: .2em; }

strong { font-weight: 600; }
em { font-style: italic; }

.wrap { max-width: 78rem; margin: 0 auto; padding: 0 1.5rem; }

.num {
  font-family: ui-sans-serif, -apple-system, system-ui, sans-serif;
  font-size: .75rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--soft); display: block; margin-bottom: .35rem;
}

.he { font-family: "Frank Ruhl Libre", serif; direction: rtl; unicode-bidi: isolate; font-size: 1.1em; }
.mono { font-variant-numeric: tabular-nums; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 1rem; top: .75rem; z-index: 60; background: var(--ink); color: var(--paper); padding: .6rem 1rem; border-radius: 4px; }

/* ---------- header ---------- */

header.bar {
  position: sticky; top: 0; z-index: 30;
  background: var(--paper);
  border-bottom: 1px solid var(--rule-soft);
}
.bar__in {
  max-width: 78rem; margin: 0 auto; padding: .6rem 1.5rem;
  display: flex; align-items: center; gap: 1rem;
}
.bar__title {
  font-size: .9375rem; color: var(--soft); margin: 0;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.bar__title b { color: var(--ink); font-weight: 600; }
.bar__spacer { flex: 1; }

.plain {
  font: inherit; font-size: .875rem;
  background: none; border: 1px solid var(--rule);
  color: var(--soft); border-radius: 4px;
  min-height: 40px; padding: 0 .75rem; cursor: pointer;
  display: inline-flex; align-items: center; gap: .4rem;
  transition: color 180ms ease, border-color 180ms ease;
}
.plain:hover { color: var(--ink); border-color: var(--soft); }
.plain svg { width: 16px; height: 16px; }

/* ---------- title block ---------- */

.title { padding: 4rem 0 2.5rem; }
.title .kicker { color: var(--soft); font-size: .9375rem; margin-bottom: .75rem; }
.title h1 { font-size: clamp(2rem, 5vw, 2.75rem); margin-bottom: .75rem; }
.title .sub { color: var(--soft); max-width: var(--measure); margin-bottom: 0; }

/* ---------- contents ---------- */

nav.contents { padding: 0 0 2rem; }
nav.contents ol { list-style: none; margin: 0; padding: 0; columns: 2; column-gap: 2rem; }
@media (max-width: 42rem) { nav.contents ol { columns: 1; } }
nav.contents li { margin-bottom: .3rem; break-inside: avoid; }
nav.contents a { color: var(--ink); text-decoration: none; font-size: 1rem; display: flex; gap: .6rem; padding: .25rem 0; }
nav.contents a:hover { color: var(--accent); }
nav.contents a span { color: var(--soft); font-size: .8125rem; min-width: 1.2rem; padding-top: .15rem; }

/* ---------- sections ---------- */

section { padding: 3rem 0; border-top: 1px solid var(--rule-soft); scroll-margin-top: 4.5rem; }
section > p:last-child { margin-bottom: 0; }
.intro { color: var(--soft); }

/* ---------- source text ---------- */

blockquote {
  margin: 0 0 1.25rem; padding: 0 0 0 1.25rem;
  border-left: 2px solid var(--rule);
  font-size: 1.125rem;
}
blockquote p:last-child { margin-bottom: 0; }
.attrib { color: var(--soft); font-size: .9375rem; margin-bottom: .5rem; }
.attrib b { color: var(--ink); font-weight: 600; }

/* ---------- tables ---------- */

.tbl { overflow-x: auto; margin-bottom: 1.5rem; }
table { border-collapse: collapse; width: 100%; font-size: 1rem; min-width: 30rem; }
th, td { text-align: left; padding: .6rem .9rem .6rem 0; border-bottom: 1px solid var(--rule-soft); vertical-align: baseline; }
thead th {
  font-family: ui-sans-serif, -apple-system, system-ui, sans-serif;
  font-size: .6875rem; letter-spacing: .08em; text-transform: uppercase;
  color: var(--soft); font-weight: 600; border-bottom-color: var(--rule);
}
tbody tr:last-child td { border-bottom: none; }

/* ---------- definition list ---------- */

dl.defs { margin: 0; }
dl.defs > div { padding: .9rem 0; border-bottom: 1px solid var(--rule-soft); }
dl.defs > div:last-child { border-bottom: none; }
dl.defs dt { font-weight: 600; margin-bottom: .15rem; }
dl.defs dd { margin: 0; color: var(--soft); max-width: var(--measure); }

/* ---------- writing prompts ---------- */

.prompt { margin: 0 0 1.25rem; }
.prompt label { display: block; margin-bottom: .4rem; max-width: var(--measure); }
textarea, input[type="text"] {
  width: 100%; max-width: var(--measure);
  font-family: inherit; font-size: 1.0625rem; line-height: 1.6; color: var(--ink);
  background: transparent;
  border: 1px solid var(--rule); border-radius: 4px;
  padding: .55rem .7rem;
  transition: border-color 180ms ease;
}
input[type="text"] { min-height: 44px; }
textarea { min-height: 5.5rem; resize: vertical; display: block; }
textarea:hover, input[type="text"]:hover { border-color: var(--soft); }
textarea:focus, input[type="text"]:focus { border-color: var(--accent); }

.save-note { font-size: .8125rem; color: var(--soft); margin: 0; min-height: 1.1rem; }

/* ---------- self check ---------- */

.check { margin: 0; }
.check > div { padding: 1rem 0; border-bottom: 1px solid var(--rule-soft); }
.check > div:last-child { border-bottom: none; }
.check .q { margin-bottom: .5rem; max-width: var(--measure); }
.check .ans {
  color: var(--soft); max-width: var(--measure);
  padding-left: .9rem; border-left: 2px solid var(--rule); margin: .5rem 0 0;
}
.check .ans[hidden] { display: none; }
.reveal {
  font: inherit; font-size: .9375rem; background: none; border: 0; padding: .25rem 0;
  color: var(--accent); cursor: pointer; text-decoration: underline; text-underline-offset: .2em;
  min-height: 40px;
}

/* ---------- citation practice ---------- */

.drill { max-width: var(--measure); }
.drill__cite { font-size: 1.5rem; margin-bottom: 1rem; }
.drill .row { display: grid; gap: .9rem; grid-template-columns: 1.4fr .8fr .8fr; margin-bottom: 1rem; }
@media (max-width: 42rem) { .drill .row { grid-template-columns: 1fr; } }
.drill .row label { display: block; font-size: .8125rem; color: var(--soft); margin-bottom: .3rem; }
.drill .actions { display: flex; gap: .75rem; align-items: center; flex-wrap: wrap; }
.result { margin: 1rem 0 0; color: var(--soft); }
.result[hidden] { display: none; }
.result b { color: var(--ink); font-weight: 600; }

/* ---------- checklist ---------- */

ul.tasks { list-style: none; margin: 0; padding: 0; }
ul.tasks li { border-bottom: 1px solid var(--rule-soft); }
ul.tasks li:last-child { border-bottom: none; }
ul.tasks label { display: flex; gap: .75rem; align-items: flex-start; padding: .8rem 0; cursor: pointer; min-height: 44px; }
ul.tasks input { width: 18px; height: 18px; margin-top: .35rem; accent-color: var(--accent); flex-shrink: 0; }
ul.tasks input:checked + span { color: var(--soft); }

footer { border-top: 1px solid var(--rule-soft); padding: 2rem 0 4rem; color: var(--soft); font-size: .9375rem; }
footer p { max-width: var(--measure); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: .001ms !important; }
}

@media print {
  header.bar, .plain, .reveal, nav.contents { display: none; }
  .check .ans[hidden] { display: block !important; }
  section { border-top: 1px solid #ccc; page-break-inside: avoid; }
  body { font-size: 11pt; }
}

/* ---------- side menu ---------- */

.side { display: none; }

.side__label {
  font-family: ui-sans-serif, -apple-system, system-ui, sans-serif;
  font-size: .6875rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--soft); margin: 0 0 .6rem;
}
.side ol { list-style: none; margin: 0; padding: 0; }
.side li { margin: 0; }
.side a {
  display: flex; gap: .55rem; align-items: baseline;
  padding: .4rem 0 .4rem .75rem;
  border-left: 1px solid var(--rule-soft);
  color: var(--soft); text-decoration: none;
  font-size: .9375rem; line-height: 1.35;
  transition: color 180ms ease, border-color 180ms ease;
}
.side a:hover { color: var(--ink); border-left-color: var(--soft); }
.side a[aria-current="true"] { color: var(--ink); border-left-color: var(--accent); }
.side a i { font-style: normal; font-size: .75rem; color: var(--soft); min-width: .9rem; flex-shrink: 0; }

/* Two columns once there is room for them. The menu is a grid cell,
   so it can never sit on top of the text. */
@media (min-width: 62rem) {
  .wrap {
    display: grid;
    grid-template-columns: 13rem minmax(0, 1fr);
    column-gap: 3.5rem;
    align-items: start;
  }
  .side {
    display: block;
    grid-column: 1;
    grid-row: 1 / span 2;
    position: sticky;
    top: 4.5rem;
    max-height: calc(100vh - 6rem);
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 4rem 0 1rem;
  }
  main { grid-column: 2; }
  footer { grid-column: 2; }
  nav.contents { display: none; }
}

@media print { .side { display: none !important; } .wrap { display: block; } }