/* ביטקוין בגובה העיניים: editorial stylesheet */

:root {
  --paper: #f7f7f4;
  --paper-tint: #eceef1;
  --ink: #152238;
  --ink-soft: #46526a;
  --rule: #d9dbd6;
  --accent: #b8520f;

  --font-sans: system-ui, -apple-system, "Segoe UI", "Arial Hebrew", "Noto Sans Hebrew", Arial, sans-serif;
  --font-serif: "Frank Ruehl CLM", "Noto Serif Hebrew", "David", "Times New Roman", serif;

  --measure: 42rem;
  --toc-width: 15rem;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --page-max: calc(var(--measure) + var(--toc-width) + 4rem);
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.125rem;
  line-height: 1.8;
  overflow-wrap: break-word;
}

[id] {
  scroll-margin-top: 1.5rem;
}

h1,
h2,
h3 {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--ink);
  text-wrap: balance;
}

p {
  margin: 0 0 1.25em;
}

a {
  color: var(--ink);
  text-decoration-line: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 0.09em;
  text-underline-offset: 0.22em;
}

a:hover {
  text-decoration-color: var(--ink);
  text-decoration-thickness: 0.13em;
}

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

main:focus {
  outline: none;
}

/* Skip link */

.skip-link {
  position: absolute;
  inset-inline-start: 1rem;
  top: -4rem;
  z-index: 10;
  padding: 0.6rem 1rem;
  background: var(--ink);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

/* Site header */

.site-header {
  border-bottom: 1px solid var(--rule);
}

.site-header__inner {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0.9rem var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.25rem 1.5rem;
}

.site-name {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  padding-block: 0.35rem;
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0 1.25rem;
}

.site-nav a {
  display: inline-block;
  padding-block: 0.4rem;
  font-size: 1rem;
  color: var(--ink-soft);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--accent);
}

/* Page layout */

.page {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: clamp(2.5rem, 7vw, 5rem) var(--gutter) 3rem;
}

/* Article */

.article__header {
  max-width: var(--measure);
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.article__label {
  margin: 0 0 0.9rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent);
}

.article__header h1 {
  margin: 0;
  font-size: clamp(2.1rem, 1.3rem + 3.6vw, 3.5rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.prose {
  max-width: var(--measure);
}

.article__lead p:first-child {
  font-size: 1.25rem;
  line-height: 1.75;
}

.prose h2 {
  margin: 2.75em 0 0.7em;
  font-size: clamp(1.45rem, 1.2rem + 1vw, 1.8rem);
  line-height: 1.3;
}

.prose section:first-child h2 {
  margin-top: 1.5em;
}

/* Table of contents: a short chain of linked blocks */

.toc {
  margin: 2rem 0 0.5rem;
  padding: 1.25rem 1.25rem 1rem;
  background: var(--paper-tint);
  border-radius: 6px;
  max-width: var(--measure);
}

.toc__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink-soft);
}

.toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.toc__list li {
  position: relative;
  padding-inline-start: 1.6rem;
  padding-bottom: 0.7rem;
  font-size: 0.98rem;
  line-height: 1.5;
}

.toc__list li:last-child {
  padding-bottom: 0.25rem;
}

.toc__list li::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  top: 0.38em;
  width: 0.7rem;
  height: 0.7rem;
  border: 2px solid var(--accent);
  background: var(--paper);
  z-index: 1;
}

.toc__list li:not(:last-child)::after {
  content: "";
  position: absolute;
  inset-inline-start: calc(0.35rem - 1px);
  top: calc(0.38em + 0.7rem);
  bottom: 0;
  width: 2px;
  background: var(--rule);
}

.toc__list a {
  text-decoration: none;
  display: inline-block;
}

.toc__list a:hover,
.toc__list a:focus-visible {
  text-decoration: underline;
  text-decoration-color: var(--accent);
}

@media (min-width: 64rem) {
  .article__body {
    display: grid;
    grid-template-columns: minmax(0, var(--measure)) var(--toc-width);
    column-gap: 4rem;
    align-items: start;
  }

  .article__lead {
    grid-column: 1;
    grid-row: 1;
  }

  .article__sections {
    grid-column: 1;
    grid-row: 2;
  }

  .toc {
    grid-column: 2;
    grid-row: 1 / span 2;
    position: sticky;
    top: 1.5rem;
    margin: 0.4rem 0 0;
    padding: 0;
    background: none;
    border-radius: 0;
  }

  .toc__list li {
    font-size: 0.93rem;
  }
}

/* FAQ */

.faq,
.sources {
  max-width: var(--measure);
  margin-top: clamp(3.5rem, 8vw, 5rem);
}

.faq > h2,
.sources > h2 {
  margin: 0 0 1.25rem;
  font-size: clamp(1.45rem, 1.2rem + 1vw, 1.8rem);
  line-height: 1.3;
}

.faq__list {
  display: grid;
  gap: 0.75rem;
}

.faq__item {
  padding: 1.1rem 1.25rem;
  background: var(--paper-tint);
  border-inline-start: 3px solid var(--accent);
  border-radius: 2px;
}

.faq__item h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.5;
}

.faq__item p {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.7;
}

/* Sources */

.sources__list {
  margin: 0;
  padding-inline-start: 1.5rem;
}

.sources__list li {
  margin-bottom: 0.9rem;
  padding-inline-start: 0.25rem;
  line-height: 1.55;
}

.sources__list li::marker {
  color: var(--ink-soft);
  font-weight: 600;
}

.sources__domain {
  display: block;
  font-size: 0.88rem;
  color: var(--ink-soft);
  text-align: right;
}

/* Footer */

.site-footer {
  margin-top: 3rem;
  border-top: 1px solid var(--rule);
}

.site-footer p {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 1.5rem var(--gutter) 2rem;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

/* Small screens */

@media (max-width: 30rem) {
  body {
    font-size: 1.0625rem;
  }

  .article__lead p:first-child {
    font-size: 1.15rem;
  }

  .site-header__inner {
    padding-block: 0.6rem;
  }
}

@media print {
  .skip-link,
  .site-nav,
  .toc {
    display: none;
  }

  body {
    background: #fff;
  }
}