/* Every page's styles. A file, not a <style> block, because the
   Content-Security-Policy (main.py) allows no inline styles; the fonts are
   files here too (fonts/, with their licence in fonts/OFL.txt), as it allows
   nothing from other sites. Light only, by choice (sitting 21). */
@font-face { font-family: "Newsreader"; src: url("fonts/newsreader.woff2") format("woff2"); font-weight: 200 800; font-display: swap; }
@font-face { font-family: "Newsreader"; src: url("fonts/newsreader-italic.woff2") format("woff2"); font-weight: 200 800; font-style: italic; font-display: swap; }
@font-face { font-family: "Instrument Sans"; src: url("fonts/instrument-sans.woff2") format("woff2"); font-weight: 400 700; font-display: swap; }

:root {
  --paper: #fcfcfb;
  --ink: #22211f;
  --muted: #6b6963;
  --line: #e6e4df;
  --leader: #c9c6bf;
  --highlight: #f6e27a;
  --highlight-soft: #fdf7d6;
  --wash: #f3f2ee;
  --panel: #ffffff;
  --button: #22211f;
  --on-button: #fcfcfb;
  --danger: #a3372a;
  --serif: "Newsreader", Georgia, serif;
  --sans: "Instrument Sans", system-ui, sans-serif;
  color-scheme: light;
}

* { box-sizing: border-box; }
/* connect.js and timezone.js show and hide parts of a page; hidden wins over any display. */
[hidden] { display: none !important; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 1.0625rem/1.6 var(--sans); overflow-wrap: break-word; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-underline-offset: 0.2em; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

/* The frame. Signed out: a bar over one centred column. */
.top { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1.25rem; max-width: 46rem; margin: 0 auto; padding: 1.5rem 1.25rem; }
.brand { display: inline-flex; align-items: center; gap: 0.55rem; margin-right: auto; font-family: var(--serif); font-size: 1.3rem; font-weight: 500; text-decoration: none; }
.mark { width: 1.5rem; height: 1.5rem; color: var(--ink); }
.signin { padding: 0.4rem 0.2rem; color: var(--muted); font-size: 0.95rem; }
.signin:hover { color: var(--ink); }
.content { min-width: 0; }
main, .foot { max-width: 46rem; margin: 0 auto; padding-inline: 1.25rem; }
main { padding-block: 2rem 3rem; }
.foot { padding-block: 1.5rem 2.5rem; color: var(--muted); font-size: 0.88rem; }
.foot::before { content: ""; display: block; margin-bottom: 1.5rem; border-top: 1px solid var(--line); }

/* Signed in: a bar along the top on a phone, a sidebar on a wide screen. */
.signed-in .top { max-width: none; padding: 1rem 1.25rem; background: var(--wash); border-bottom: 1px solid var(--line); }
.signed-in main, .signed-in .foot { margin: 0; }
nav { display: flex; flex-wrap: wrap; gap: 0.25rem; order: 3; width: 100%; }
nav a { margin-left: 0; padding: 0.35rem 0.7rem; border-radius: 6px; color: var(--muted); font-size: 0.95rem; text-decoration: none; }
nav a:first-child { margin-left: -0.7rem; }
nav a:hover { color: var(--ink); }
nav a[aria-current="page"] { background: var(--highlight); color: var(--ink); font-weight: 600; }
.signout button.link { color: var(--muted); font-size: 0.9rem; }

@media (min-width: 56rem) {
  .signed-in .shell { display: grid; grid-template-columns: 14rem 1fr; min-height: 100vh; }
  .signed-in .top { position: sticky; top: 0; flex-direction: column; flex-wrap: nowrap; align-items: stretch; gap: 2rem; height: 100vh; padding: 1.75rem 1.25rem; border-right: 1px solid var(--line); border-bottom: 0; }
  .signed-in .brand { margin-right: 0; }
  .signed-in nav { flex-direction: column; order: 0; }
  .signed-in nav a:first-child { margin-left: 0; }
  .signed-in .signout { margin-top: auto; padding-left: 0.7rem; }
  .signed-in main, .signed-in .foot { padding-inline: 3rem; }
  .signed-in main { padding-block: 3rem; }
}

/* Type */
h1 { margin: 0; font-family: var(--serif); font-size: clamp(2.2rem, 6vw, 2.9rem); font-weight: 400; font-variation-settings: "opsz" 72; line-height: 1.05; letter-spacing: -0.02em; text-wrap: balance; }
h2 { margin: 3rem 0 0.75rem; font-family: var(--serif); font-size: 1.6rem; font-weight: 400; font-style: italic; }
h3 { margin: 2rem 0 0.5rem; font-size: 1.05rem; font-weight: 600; }
p { margin: 0.75rem 0; }
.page-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 0.25rem 1rem; }
.page-head p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.summary { margin: 0.75rem 0 1.5rem; font-size: 1.1rem; }
.page-head + form, .page-head + .error, .page-head + .saved { margin-top: 1.75rem; }
.hint { color: var(--muted); font-size: 0.95rem; }
.error { color: var(--danger); }
.saved { display: inline-block; padding: 0 0.3em; background: var(--highlight); font-weight: 600; }
.notice { margin: 1.25rem 0; padding: 0.6rem 0.9rem; background: var(--highlight-soft); }
mark { padding: 0 0.25em; background: var(--highlight); color: inherit; }
/* Read out by screen readers, not shown: a label a column needs, say. */
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }

/* Buttons and fields, big enough for a finger. */
input, select, button { font: inherit; color: inherit; }
button, .button { display: inline-flex; align-items: center; justify-content: center; min-height: 2.6rem; padding: 0 1rem; border: 1px solid var(--ink); border-radius: 6px; background: transparent; font-size: 0.95rem; font-weight: 600; text-decoration: none; cursor: pointer; }
button:hover, .button:hover { background: var(--line); }
button:disabled { border-color: var(--line); color: var(--muted); background: transparent; cursor: default; }
.primary { min-height: 3rem; padding: 0 1.4rem; background: var(--button); color: var(--on-button); font-size: 1rem; }
.primary:hover { background: var(--muted); }
button.danger { border-color: var(--danger); color: var(--danger); }
button.link { min-height: 0; padding: 0; border: 0; background: none; font-weight: 400; text-decoration: underline; }
form.inline { display: inline; }
fieldset { margin: 0 0 2rem; padding: 0; border: 0; }
legend { margin-bottom: 0.5rem; padding: 0; font-family: var(--serif); font-size: 1.35rem; }
label { display: block; margin: 0.35rem 0; }
input[type=url], input[type=text], input[type=email], select { width: 100%; max-width: 100%; padding: 0.55rem 0.7rem; border: 1px solid var(--leader); border-radius: 6px; background: var(--panel); }
input[type=number] { width: 4.5rem; padding: 0.3rem 0.4rem; border: 0; border-bottom: 1.5px solid var(--ink); background: transparent; text-align: center; font-variant-numeric: tabular-nums; }
input:focus { outline: 2px solid var(--highlight); outline-offset: 1px; }
label.check { display: flex; align-items: baseline; gap: 0.5rem; }
.check input { accent-color: var(--ink); }
details { margin-top: 0.4rem; }
summary { color: var(--muted); font-size: 0.9rem; cursor: pointer; }
details ul { margin: 0.5rem 0; padding-left: 1.1rem; font-size: 0.95rem; }

/* Today's queue: each problem a card, its recall in big serif figures. */
.queue { display: grid; gap: 0.75rem; margin: 0; padding: 0; list-style: none; }
.item { display: grid; grid-template-columns: 1fr auto; align-items: start; gap: 0.75rem 1rem; padding: 1.1rem 1.25rem; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; }
.item-text { display: grid; min-width: 0; }
.title { font-family: var(--serif); font-size: 1.3rem; line-height: 1.3; }
.meta { margin: 0; color: var(--muted); font-size: 0.9rem; }
.recall { margin: 0; color: var(--muted); font-size: 0.8rem; line-height: 1.1; text-align: right; }
.recall span { display: block; color: var(--ink); font-family: var(--serif); font-size: 1.9rem; font-variant-numeric: lining-nums tabular-nums; }
.item .start { justify-self: start; }
/* The card's pattern, hidden until asked for, so it doesn't give the approach away. */
.item .pattern { margin-top: 0.3rem; }
.item .pattern p { margin: 0.2rem 0 0; font-weight: 600; }
.grades { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; }
.item .grades { display: grid; grid-template-columns: repeat(2, 1fr); grid-column: 1 / -1; padding-top: 0.9rem; border-top: 1px solid var(--line); }
.grades .ask { grid-column: 1 / -1; color: var(--muted); font-size: 0.9rem; }
@media (min-width: 34rem) { .item .grades { grid-template-columns: repeat(4, 1fr); } }
/* The pattern menu under the four grades. */
.item .grades .pick { grid-column: 1 / -1; display: flex; flex-wrap: wrap; align-items: center; gap: 0.4rem 0.75rem; margin: 0.25rem 0 0; color: var(--muted); font-size: 0.9rem; }
.item .grades .pick select { flex: 1; width: auto; min-width: 12rem; max-width: 22rem; color: var(--ink); font-size: 0.95rem; }
/* A pattern menu, or a pattern's name, with its Save button. */
.pattern-form { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; margin-top: 0.5rem; }
.pattern-form select, .pattern-form input[type=text] { flex: 1; width: auto; min-width: 11rem; max-width: 20rem; }

/* Name …… date: dotted leaders, as in a table of contents. */
.leader { display: flex; align-items: baseline; gap: 0.5rem; }
.leader::after { content: ""; order: 1; flex: 1; min-width: 1.5rem; border-bottom: 1.5px dotted var(--leader); }
.leader .title { min-width: 0; font-size: 1.2rem; }
.when { order: 2; color: var(--muted); font-size: 0.9rem; font-variant-numeric: tabular-nums; white-space: nowrap; }
.graded { margin: 0; padding: 0; list-style: none; }
.graded > li { padding-block: 0.7rem; }
.graded .grades, .graded .time { margin-top: 0.5rem; }
/* Change and Change time side by side; an open one takes the whole row. */
.changes { display: flex; flex-wrap: wrap; gap: 0 1.25rem; }
.changes details[open] { flex-basis: 100%; }
/* Minutes and seconds: Add, and Change time. */
.time { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.5rem 1rem; }
.time label { display: inline-flex; align-items: baseline; gap: 0.35rem; margin: 0; }

/* Problems: a table on a wide screen; each row a small block on a phone. */
.problems { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.problems th { padding: 0 0.75rem 0.6rem 0; border-bottom: 1px solid var(--ink); color: var(--muted); font-size: 0.75rem; font-weight: 600; letter-spacing: 0.05em; text-align: left; text-transform: uppercase; }
.problems td { padding: 0.85rem 0.75rem 0.85rem 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.problems .num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.problems th:last-child, .problems td:last-child { padding-right: 0; }
.problems .title { display: block; font-size: 1.15rem; text-decoration: none; }
.problems .title:hover { text-decoration: underline; }
.problems .when span { display: block; }
.problems .due .due-text { display: inline; padding: 0 0.3em; background: var(--highlight); font-weight: 600; }
/* A problem solved with two patterns or more: a line per card beneath it. */
.problems .has-cards td { padding-bottom: 0.3rem; border-bottom: 0; }
.problems .card td { padding-block: 0.45rem; }
.problems .card .pattern { padding-left: 1.1rem; }
/* Stop reviewing and Review again, in a column of their own; a stopped card's line is dimmed. */
.problems .act { text-align: right; white-space: nowrap; }
.problems .act .link { color: var(--muted); font-size: 0.88rem; }
.problems .act .link:hover { color: var(--ink); }
.problems .stopped td:not(.act), .problems .stopped .title { color: var(--muted); }
.problems .stopped .due-text { font-weight: 600; }
.problems .stopped .act .link { color: var(--ink); font-weight: 600; }
@media (max-width: 40rem) {
  .problems thead { display: none; }
  .problems, .problems tbody, .problems tr, .problems td { display: block; }
  .problems tr { display: grid; grid-template-columns: 1fr auto; gap: 0.3rem 1rem; padding-block: 0.9rem; border-bottom: 1px solid var(--line); }
  .problems td { padding: 0; border: 0; }
  .problems .problem, .problems .pattern { grid-column: 1 / -1; }
  .problems .has-cards { padding-bottom: 0.2rem; border-bottom: 0; }
  .problems .card { padding-block: 0.45rem; }
  .problems .when { grid-column: 1; grid-row: 2; }
  .problems .num { grid-row: 2; }
  .problems .num::before { content: attr(data-label); display: block; color: var(--muted); font-size: 0.75rem; }
  .problems .act { grid-column: 1 / -1; grid-row: 3; text-align: left; }
}

/* Add: the four grades as rows you can pick. */
.choices { display: grid; gap: 0.5rem; }
.choice { display: grid; grid-template-columns: auto 1fr; gap: 0 0.75rem; margin: 0; padding: 0.75rem 0.9rem; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; }
.choice:has(input:checked) { border-color: var(--ink); background: var(--highlight-soft); }
.choice input { grid-row: span 2; margin-top: 0.35rem; accent-color: var(--ink); }
.choice-name { font-weight: 600; }
.choice-hint { color: var(--muted); font-size: 0.9rem; }
#problem p { margin: 0.6rem 0 0; }

/* Settings */
.section { margin-top: 3rem; padding-top: 0.25rem; border-top: 1px solid var(--line); }
.section h2 { margin-top: 1.25rem; }
.danger h3 { color: var(--danger); }
/* Your patterns: each with Rename, and Delete while no card has it. */
.own li { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.25rem 0.6rem; }
.own .own-name { font-weight: 600; }
.own .changes { flex-basis: 100%; align-items: baseline; }
.own .changes .link { font-size: 0.9rem; }
.add-own { margin-block: 1rem 0.5rem; }

/* Settings and Add on a wide screen: the label beside its fields. */
@media (min-width: 56rem) {
  .signed-in main fieldset { display: grid; grid-template-columns: 11rem 1fr; column-gap: 2rem; }
  .signed-in main fieldset > legend { float: left; grid-column: 1; grid-row: 1 / span 9; margin: 0; font-size: 1.2rem; line-height: 1.4; }
  .signed-in main fieldset > :not(legend) { grid-column: 2; }
  .signed-in main fieldset > label:first-of-type, .signed-in main fieldset > :nth-child(2) { margin-top: 0; }
  .choices { grid-template-columns: 1fr 1fr; }
}

/* Connect's list of browsers, and the getting-started steps on Today. */
.rows { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.rows li { padding-block: 0.8rem; border-bottom: 1px solid var(--line); }
.rows form { margin-top: 0.5rem; }
.steps { padding-left: 1.4rem; }
.steps li { margin: 0.5rem 0; }
.steps .done { color: var(--muted); }

/* The landing page, for anyone signed out at /. */
.landing { line-height: 1.65; }
.landing main { padding-block: 0; }
.landing .hero { padding-block: clamp(2.5rem, 9vw, 5.5rem) 2.5rem; }
.landing h1 { font-size: clamp(2.5rem, 7vw, 4.1rem); }
.landing mark { padding: 0 0.08em; background: linear-gradient(transparent 58%, var(--highlight) 58%, var(--highlight) 92%, transparent 92%); color: inherit; font-style: italic; }
.lede { max-width: 34rem; margin: 1.5rem 0 0; color: var(--muted); font-size: 1.15rem; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 1.5rem; margin-top: 2rem; }
.landing .primary { padding: 0 1.3rem; border: 0; }
.more { padding-block: 0.6rem; font-weight: 600; }
.note { margin: 1rem 0 0; color: var(--muted); font-size: 0.88rem; }
.example { margin: 1.5rem 0 0; }
.example-head { display: flex; justify-content: space-between; margin: 0 0 0.5rem; padding-bottom: 0.6rem; border-bottom: 1px solid var(--ink); font-size: 0.78rem; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; }
.example-head span + span { color: var(--muted); font-weight: 500; }
.example ol { margin: 0; padding: 0; list-style: none; }
.example li { padding-block: 0.45rem; }
.example .when { font-size: 0.92rem; }
.example .due .when { padding: 0 0.3em; background: var(--highlight); color: var(--ink); font-weight: 600; }
.how { padding-block: 4rem 2rem; }
.how h2 { margin: 0 0 1.25rem; font-size: 1.8rem; }
.how ol { display: grid; gap: 1.1rem; margin: 0; padding-left: 1.6rem; }
.how li::marker { color: var(--muted); font-family: var(--serif); font-style: italic; }
.how p { margin: 0; }
.facts { display: grid; gap: 0.5rem; padding-block: 2.5rem; }
.figure { margin: 0; font-family: var(--serif); font-size: clamp(3rem, 10vw, 4.5rem); font-weight: 300; line-height: 1; letter-spacing: -0.02em; font-variant-numeric: lining-nums; }
.facts p + p { max-width: 36rem; margin: 0; color: var(--muted); }
.close { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.25rem 2rem; padding-block: 2.5rem; border-top: 1px solid var(--line); }
.close p { max-width: 28rem; margin: 0; color: var(--muted); }