/* Stepping Stones Financial
   Same system as gabrielamsih.com: band, running head, tabs, serif reading text,
   Franklin frame. Brand colors only: #5FA8EA blue, #2D2D2D ink, #FAFAFA ground,
   #4A97D9 hover blue. Tints are those colors at lower opacity. */

/* ---------- Tokens ---------- */
:root {
  --blue: #5FA8EA;
  --blue-deep: #4A97D9;
  --ground: #FAFAFA;
  --ink: #2D2D2D;
  --ink-2: rgba(45, 45, 45, 0.74);      /* 5.6:1 on ground */
  --rule: rgba(95, 168, 234, 0.28);
  --rule-strong: #2D2D2D;
  --panel: rgba(95, 168, 234, 0.10);
  --hover: rgba(95, 168, 234, 0.12);
  --link: #2D2D2D;                       /* blue text fails contrast on light ground; blue carries the underline */
  --link-line: #5FA8EA;
  --focus: #2D2D2D;
  --select: rgba(95, 168, 234, 0.30);

  --serif: "Source Serif 4", "Source Serif Pro", Georgia, serif;
  --frame: "Libre Franklin", "Franklin Gothic Medium", "Helvetica Neue", Arial, sans-serif;

  --r: 4px;
  --measure: 40rem;
  --page: 52rem;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ground: #2D2D2D;
    --ink: #FAFAFA;
    --ink-2: rgba(250, 250, 250, 0.74);
    --rule: rgba(95, 168, 234, 0.30);
    --rule-strong: #FAFAFA;
    --panel: rgba(95, 168, 234, 0.12);
    --hover: rgba(95, 168, 234, 0.14);
    --link: #5FA8EA;                     /* 5.4:1 on #2D2D2D */
    --link-line: rgba(95, 168, 234, 0.55);
    --focus: #5FA8EA;
    --select: rgba(95, 168, 234, 0.35);
  }
}

/* Arabic: the Latin faces have no Arabic glyphs, so Arabic text falls back to
   Noto Naskh Arabic. Latin words inside Arabic pages still use the two faces. */
:lang(ar) {
  --serif: "Source Serif 4", "Noto Naskh Arabic", Georgia, serif;
  --frame: "Libre Franklin", "Noto Naskh Arabic", Arial, sans-serif;
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font: 400 1.0625rem/1.62 var(--serif);
  font-optical-sizing: auto;
}
:lang(ar) body, body:lang(ar) { font-size: 1.125rem; line-height: 1.8; }
::selection { background: var(--select); color: inherit; }
p { margin: 0; }
a {
  color: var(--link);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.2em;
  text-decoration-color: var(--link-line);
}
a:hover { color: var(--link); text-decoration-color: var(--blue-deep); background: var(--hover); border-radius: 2px; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; border-radius: var(--r); }
.skip {
  position: absolute;
  inset-inline-start: 1rem;
  top: -3rem;
  padding: 0.5rem 0.75rem;
  background: var(--blue);
  color: #2D2D2D;
  font: 600 0.875rem/1 var(--frame);
  border-radius: var(--r);
  text-decoration: none;
  z-index: 20;
}
.skip:focus { top: 1rem; }

/* ---------- Masthead ---------- */
.band { height: 0.5rem; background: var(--blue); }
.runhead, .tabs, main, .colophon {
  max-width: var(--page);
  margin-inline: auto;
  padding-inline: 1.5rem;
}
.runhead {
  display: flex;
  align-items: center;
  gap: 0.75rem 1rem;
  padding-block: 1rem 0.85rem;
  font-family: var(--frame);
}
.runhead-home {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  border-radius: var(--r);
}
.runhead-home:hover { background: transparent; color: var(--ink); }
.runhead-home:hover span { text-decoration: underline; text-decoration-color: var(--link-line); text-decoration-thickness: 2px; text-underline-offset: 0.2em; }
.runhead-home img { display: block; height: 1.6rem; width: auto; }
.runhead-meta {
  color: var(--ink-2);
  font-size: 0.8125rem;
  padding-inline-start: 1rem;
  border-inline-start: 1px solid var(--rule);
}
.langs {
  margin-inline-start: auto;
  display: flex;
  gap: 0.25rem;
  font-size: 0.8125rem;
}
.langs a {
  padding: 0.35rem 0.5rem;
  border-radius: var(--r);
  color: var(--ink-2);
  text-decoration: none;
}
.langs a:hover { color: var(--ink); background: var(--hover); }
.langs a[aria-current="true"] { color: var(--ink); font-weight: 600; background: var(--panel); }
.langs a:lang(ar) { font-size: 0.95rem; line-height: 1; }

.tabs {
  display: flex;
  gap: 0.25rem;
  border-bottom: 1px solid var(--rule);
  overflow-x: auto;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }
.tabs a {
  position: relative;
  padding: 0.7rem 0.75rem 0.8rem;
  color: var(--ink-2);
  font: 500 0.875rem/1 var(--frame);
  text-decoration: none;
  white-space: nowrap;
  border-radius: var(--r) var(--r) 0 0;
}
.tabs a:first-child { margin-inline-start: -0.75rem; }
.tabs a:hover { color: var(--ink); background: var(--hover); }
.tabs a[aria-current="page"] { color: var(--ink); font-weight: 600; }
.tabs a[aria-current="page"]::after {
  content: "";
  position: absolute;
  inset-inline: 0.75rem;
  bottom: -1px;
  height: 3px;
  background: var(--blue);
}
:lang(ar) .tabs a { font-size: 1rem; }

/* ---------- Title block ---------- */
main { padding-block: 4rem 2rem; }
.title-block { max-width: var(--measure); }
h1, h2, h3 { margin: 0; font-family: var(--serif); }
h1 {
  font-weight: 600;
  font-size: clamp(2.1rem, 6vw, 3.1rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
:lang(ar) h1 { letter-spacing: 0; line-height: 1.35; }
.affil {
  margin-top: 1rem;
  font: 500 0.9375rem/1.5 var(--frame);
}
.standfirst {
  margin-top: 1rem;
  font-size: 1.25rem;
  line-height: 1.5;
  color: var(--ink-2);
  text-wrap: pretty;
}

/* ---------- Summary panel ---------- */
.summary {
  max-width: var(--measure);
  margin-top: 2.5rem;
  padding: 1.5rem 1.75rem 1.6rem;
  background: var(--panel);
  border-radius: var(--r);
}
.summary p + p { margin-top: 0.75rem; }
.runin {
  font: 700 0.9375rem/1 var(--frame);
  letter-spacing: -0.005em;
  margin-inline-end: 0.3rem;
}
:lang(ar) .runin { letter-spacing: 0; font-size: 1rem; }
.summary-corr {
  margin-top: 1.1rem !important;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
}
.todo {
  font: 500 0.875rem/1.4 var(--frame);
  padding: 0.1rem 0.4rem;
  border: 1px dashed var(--ink-2);
  border-radius: var(--r);
  color: var(--ink-2);
  white-space: nowrap;
}

/* ---------- Sections ---------- */
.section { max-width: var(--measure); margin-top: 4rem; }
.section > h2 {
  font: 700 0.875rem/1 var(--frame);
  letter-spacing: 0.01em;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--rule-strong);
}
:lang(ar) .section > h2 { font-size: 1rem; letter-spacing: 0; }
.section > p { margin-top: 1.1rem; text-wrap: pretty; }
.section > p + p { margin-top: 0.8rem; }

/* Contents rows (modules) */
.contents { list-style: none; margin: 0; padding: 0; }
.contents li { border-bottom: 1px solid var(--rule); }
.contents a {
  display: grid;
  grid-template-columns: 11rem minmax(0, 1fr);
  gap: 1.25rem;
  align-items: baseline;
  padding: 1rem 0.75rem;
  margin-inline: -0.75rem;
  border-radius: var(--r);
  color: var(--ink);
  text-decoration: none;
}
.contents a:hover { background: var(--hover); }
.c-title { font: 600 1.25rem/1.25 var(--serif); letter-spacing: -0.01em; }
.c-title small { display: block; margin-top: 0.3rem; font: 500 0.8125rem/1.3 var(--frame); color: var(--ink-2); letter-spacing: 0; }
.c-sub { font: 400 0.9375rem/1.5 var(--frame); color: var(--ink-2); }
:lang(ar) .c-title { letter-spacing: 0; line-height: 1.5; }
:lang(ar) .c-sub { font-size: 1rem; line-height: 1.7; }
.after-list { margin-top: 1rem !important; font: 500 0.9375rem/1.5 var(--frame); }

/* Quotes */
.quote { margin: 1.4rem 0 0; }
.quote + .quote { margin-top: 1.6rem; padding-top: 1.6rem; border-top: 1px solid var(--rule); }
.quote blockquote { margin: 0; font-size: 1.1875rem; line-height: 1.5; font-style: italic; }
:lang(ar) .quote blockquote { font-style: normal; }
.quote figcaption { margin-top: 0.5rem; font: 500 0.875rem/1.4 var(--frame); color: var(--ink-2); }

/* ---------- Colophon ---------- */
.colophon {
  margin-top: 4.5rem;
  padding-block: 1.5rem 3rem;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem 2rem;
  flex-wrap: wrap;
  font-family: var(--frame);
  font-size: 0.875rem;
}
.colophon .runin { font-size: 0.875rem; }
.colophon .meta { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; color: var(--ink-2); }
.colophon .meta a { color: var(--ink-2); }
.colophon .meta a:hover { color: var(--ink); }
:lang(ar) .colophon { font-size: 0.95rem; }

/* ---------- Phones ---------- */
@media (max-width: 640px) {
  .runhead, .tabs, main, .colophon { padding-inline: 1rem; }
  .runhead { flex-wrap: wrap; }
  .runhead-meta { display: none; }
  .runhead-home span { font-size: 0.9rem; }
  .tabs a { padding-inline: 0.6rem; }
  .tabs a:first-child { margin-inline-start: -0.6rem; }
  .tabs a[aria-current="page"]::after { inset-inline: 0.6rem; }
  main { padding-block: 2.5rem 1.5rem; }
  .standfirst { font-size: 1.125rem; }
  .summary { padding: 1.2rem 1.1rem 1.3rem; margin-top: 2rem; }
  .section { margin-top: 3rem; }
  .contents a { grid-template-columns: minmax(0, 1fr); gap: 0.35rem; }
  .colophon { flex-direction: column; }
}
@media (max-width: 380px) {
  .runhead-home span { display: none; }
}

/* ---------- Shared additions ---------- */
.sep::before { content: "\00B7"; margin-inline: 0.55rem; color: var(--ink-2); }
.affil a { color: var(--ink); }
.hint { font: 400 0.875rem/1.4 var(--frame); color: var(--ink-2); }
.note { max-width: var(--measure); margin-top: 2.5rem; font: 400 0.9375rem/1.5 var(--frame); color: var(--ink-2); }
.after-list.wide { max-width: var(--measure); margin-top: 3rem !important; }

/* Stacked rows: title over description (lesson lists) */
.contents.stack a { grid-template-columns: minmax(0, 1fr); gap: 0.25rem; padding-block: 0.85rem; }
.contents.stack .c-title { font-size: 1.125rem; }

/* Topic lists */
.topics { margin: 1.1rem 0 0; padding-inline-start: 1.1rem; }
.topics li { margin-bottom: 0.4rem; padding-inline-start: 0.2rem; }
.topics li::marker { color: var(--blue); }
.topics.two { columns: 2; column-gap: 2.5rem; }
.topics.two li { break-inside: avoid; }

/* Module page lesson list */
.lesson-list { list-style: none; margin: 0; padding: 0; counter-reset: l; }
.lesson-list li { padding: 1.4rem 0 1.5rem; border-bottom: 1px solid var(--rule); counter-increment: l; }
.lesson-list h3 { font: 600 1.25rem/1.3 var(--serif); letter-spacing: -0.01em; }
.lesson-list h3::before { content: counter(l) ". "; color: var(--ink-2); font-weight: 400; }
.lesson-list h3 a { color: var(--ink); }
.lesson-list p { margin-top: 0.45rem; color: var(--ink-2); }

/* Previous / next */
.pager {
  max-width: var(--measure);
  margin-top: 3.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  border-top: 1px solid var(--rule-strong);
}
.pager a {
  display: block;
  padding: 1rem 0.75rem;
  margin-inline: -0.75rem;
  border-radius: var(--r);
  color: var(--ink);
  text-decoration: none;
  font: 600 1.0625rem/1.35 var(--serif);
}
.pager a:hover { background: var(--hover); }
.pager span { display: block; margin-bottom: 0.3rem; font: 500 0.8125rem/1.3 var(--frame); color: var(--ink-2); }
.pager .next { text-align: end; }

/* Worksheet list */
.sheet-list { list-style: none; margin: 0; padding: 0; }
.sheet-list li { border-bottom: 1px solid var(--rule); }
.sheet-list a {
  display: flex; justify-content: space-between; align-items: baseline; gap: 1rem;
  padding: 0.8rem 0.75rem; margin-inline: -0.75rem;
  border-radius: var(--r); color: var(--ink); text-decoration: none;
}
.sheet-list a:hover { background: var(--hover); }
.w-title { font: 400 1.0625rem/1.4 var(--serif); }
.w-meta { flex: none; font: 500 0.8125rem/1.3 var(--frame); color: var(--ink-2); }

/* Contents list on long pages */
.toc { max-width: var(--measure); margin-top: 2.5rem; padding: 1.1rem 1.5rem 1.2rem; background: var(--panel); border-radius: var(--r); }
.toc ol { margin: 0; padding-inline-start: 1.2rem; columns: 2; column-gap: 2rem; font: 500 0.9375rem/1.4 var(--frame); }
.toc li { padding-block: 0.25rem; break-inside: avoid; }
.toc li::marker { color: var(--ink-2); }
:target { scroll-margin-top: 1rem; }

/* FAQ */
.faq { margin: 0; }
.faq > div { padding: 1.1rem 0 1.2rem; border-bottom: 1px solid var(--rule); }
.faq dt { font: 600 1.0625rem/1.4 var(--serif); }
.faq dd { margin: 0.35rem 0 0; color: var(--ink-2); }

/* Founder pages */
.bio { max-width: var(--measure); margin-top: 2.25rem; }
.bio p + p { margin-top: 1rem; }
.entries .entry { padding: 1.3rem 0 1.4rem; border-bottom: 1px solid var(--rule); }
.entries .entry h3 { font: 600 1.1875rem/1.3 var(--serif); }
.entries .entry ul { margin: 0.6rem 0 0; padding-inline-start: 1.1rem; }
.entries .entry li { margin-bottom: 0.3rem; padding-inline-start: 0.2rem; }
.entries .entry li::marker { color: var(--blue); }

/* Glossary */
.g-controls {
  position: sticky; top: 0; z-index: 5;
  max-width: var(--measure);
  margin-top: 2.25rem;
  padding: 1rem 0 0.9rem;
  background: var(--ground);
  border-bottom: 1px solid var(--rule);
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem 1rem;
}
.g-label { flex-basis: 100%; font: 600 0.875rem/1 var(--frame); }
.g-controls input {
  flex: 1 1 16rem;
  font: 400 1rem/1.3 var(--frame);
  color: var(--ink);
  background: var(--ground);
  border: 1px solid var(--ink-2);
  border-radius: var(--r);
  padding: 0.65rem 0.8rem;
}
.g-controls input::placeholder { color: var(--ink-2); }
.g-filter { display: flex; gap: 0.25rem; flex-wrap: wrap; }
.g-filter button, .form button {
  font: 500 0.875rem/1 var(--frame);
  color: var(--ink-2);
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: var(--r);
  padding: 0.6rem 0.7rem;
  cursor: pointer;
}
.g-filter button:hover { color: var(--ink); background: var(--hover); }
.g-filter button[aria-pressed="true"] { color: #2D2D2D; background: var(--blue); border-color: var(--blue); font-weight: 600; }
.g-count { flex-basis: 100%; font: 400 0.8125rem/1 var(--frame); color: var(--ink-2); }
.g-letters { max-width: var(--measure); margin-top: 1rem; display: flex; flex-wrap: wrap; gap: 0.15rem; font: 600 0.875rem/1 var(--frame); }
.g-letters a { padding: 0.45rem 0.5rem; border-radius: var(--r); color: var(--ink); text-decoration: none; }
.g-letters a:hover { background: var(--hover); }
.g-list { max-width: var(--measure); }
.g-group { margin-top: 2.25rem; scroll-margin-top: 9rem; }
.g-letter { font: 600 1.5rem/1 var(--serif); padding-bottom: 0.6rem; border-bottom: 1px solid var(--rule-strong); }
.g-group dl { margin: 0; }
.g-term { padding: 0.8rem 0 0.9rem; border-bottom: 1px solid var(--rule); }
.g-term dt { font: 600 1.0625rem/1.35 var(--serif); }
.g-term dd { margin: 0.25rem 0 0; color: var(--ink-2); }
.g-mod { white-space: nowrap; margin-inline-start: 0.3rem; font: 500 0.75rem/1 var(--frame); color: var(--ink-2); }
.g-empty { margin-top: 2rem; }
.g-term mark { background: var(--select); color: inherit; border-radius: 2px; }

/* Contact form */
.form { margin-top: 1.25rem; display: grid; gap: 1rem; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.field { display: grid; gap: 0.35rem; }
.field label { font: 600 0.875rem/1.3 var(--frame); }
.field input, .field select, .field textarea {
  width: 100%;
  font: 400 1rem/1.4 var(--frame);
  color: var(--ink);
  background: var(--ground);
  border: 1px solid var(--ink-2);
  border-radius: var(--r);
  padding: 0.65rem 0.8rem;
}
.field textarea { resize: vertical; min-height: 8rem; }
.form-foot { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.form button { color: #2D2D2D; background: var(--blue); border-color: var(--blue); font-weight: 600; padding: 0.75rem 1.1rem; }
.form button:hover { background: var(--blue-deep); border-color: var(--blue-deep); }
.form button:disabled { opacity: 0.6; cursor: wait; }
.form-status { font: 500 0.9375rem/1.4 var(--frame); }

@media (max-width: 640px) {
  .topics.two, .toc ol { columns: 1; }
  .pager { grid-template-columns: 1fr; gap: 0; }
  .pager .next { text-align: start; border-top: 1px solid var(--rule); }
  .field-row { grid-template-columns: 1fr; }
  .sheet-list a { flex-direction: column; gap: 0.15rem; }
}

/* Phones: tabs wrap instead of scrolling, so every section is visible; glossary controls scroll with the page */
@media (max-width: 640px) {
  .tabs { flex-wrap: wrap; overflow: visible; gap: 0 0.1rem; padding-bottom: 0.2rem; }
  .tabs a { padding: 0.65rem 0.55rem 0.7rem; }
  .tabs a:first-child { margin-inline-start: -0.55rem; }
  .tabs a[aria-current="page"]::after { inset-inline: 0.55rem; bottom: 0.2rem; }
  .g-controls { position: static; }
}