/* ==========================================================================
   jillmetcalfe.com — stylesheet
   Written directly from DESIGN.md. If you change a design decision, change it
   in DESIGN.md first, then here. No framework, no build step, no SCSS.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Tokens — colours, spacing, type
   Change the three --accent-* lines to reskin the whole site.
   -------------------------------------------------------------------------- */

:root {
  /* Base — light theme (the canonical identity) */
  --paper:      #F5F2EE;
  --surface:    #FBFAF6;
  --ink:        #222120;
  --ink-soft:   #56544F;
  --ink-faint:  #8C8983;
  --line:       #E0DCD4;
  --code-bg:    #ECE8E0;

  /* Accent — magenta in light mode. These three lines control every link,
     button and highlight on the page; change them and the site changes.
     Why magenta and not a cool colour: a dark accent like Petrol (#156269) sits
     at almost the same lightness as the ink, so links read as "slightly off-black"
     rather than as a colour. Magenta is roughly as dark but far more saturated,
     so it separates from the text by hue instead of by brightness.
     Back-pocket alternatives from DESIGN.md §2, all cool and all quieter:
       Petrol  #CFE4E4 / #156269 / #0E4348
       Mauve   #DED5E6 / #655777 / #473C58
       Green   #D3E3D2 / #357046 / #224D30
       Blue    #D2E0EE / #2E5E8C / #1E4366 */
  --accent-tint: #F2DCF0;   /* callout backgrounds, text selection */
  --accent:      #B509AC;   /* links, primary button — 5.2:1 on paper */
  --accent-dark: #8A0784;   /* hover, deep emphasis — 7.7:1 on paper */

  /* Shadows are tinted with ink, never pure black */
  --shadow-1: 0 1px 2px  rgba(34, 33, 32, 0.04);
  --shadow-2: 0 6px 20px rgba(34, 33, 32, 0.08);
  --shadow-3: 0 12px 32px rgba(34, 33, 32, 0.12);

  /* Spacing scale (8px base) — use these and only these */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 24px;
  --s-6: 32px;
  --s-7: 48px;
  --s-8: 64px;
  --s-9: 96px;

  /* Layout */
  --reading-width: 680px;
  --gutter: var(--s-5);

  /* Type */
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

/* Dark theme. Applied when the system asks for it, unless the reader has
   explicitly chosen light; or when the reader has explicitly chosen dark. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper:     #1B1A18;
    --surface:   #242320;
    --ink:       #ECE7DD;
    --ink-soft:  #A6A29A;
    --ink-faint: #7C786F;
    --line:      #37352F;
    --code-bg:   #242320;

    --accent-tint: #16323B;
    --accent:      #2698BA;   /* 5.2:1 on the dark paper */
    --accent-dark: #7BCFE8;   /* hover goes lighter in dark mode, not darker */

    --shadow-1: 0 1px 2px  rgba(0, 0, 0, 0.20);
    --shadow-2: 0 6px 20px rgba(0, 0, 0, 0.30);
    --shadow-3: 0 12px 32px rgba(0, 0, 0, 0.40);
  }
}

:root[data-theme="dark"] {
  --paper:     #1B1A18;
  --surface:   #242320;
  --ink:       #ECE7DD;
  --ink-soft:  #A6A29A;
  --ink-faint: #7C786F;
  --line:      #37352F;
  --code-bg:   #242320;

  --accent-tint: #16323B;
  --accent:      #2698BA;
  --accent-dark: #7BCFE8;

  --shadow-1: 0 1px 2px  rgba(0, 0, 0, 0.20);
  --shadow-2: 0 6px 20px rgba(0, 0, 0, 0.30);
  --shadow-3: 0 12px 32px rgba(0, 0, 0, 0.40);
}

/* --------------------------------------------------------------------------
   2. Reset & base
   -------------------------------------------------------------------------- */

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.1875rem;   /* 19px — the reading size */
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

img, video { max-width: 100%; height: auto; }

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: var(--s-7) 0;
}

::selection {
  background: var(--accent-tint);
  color: var(--ink);
}

/* --------------------------------------------------------------------------
   3. Typography
   -------------------------------------------------------------------------- */

h1, h2, h3, h4 {
  scroll-margin-top: var(--s-8);
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--ink);
  margin: 0;
  font-variation-settings: "SOFT" 0, "WONK" 0;
}

h1 {
  font-size: 2rem;             /* 32px on mobile */
  line-height: 1.1;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 1.625rem;
  line-height: 1.2;
  margin-top: var(--s-7);
  margin-bottom: var(--s-4);
}

h3 {
  font-size: 1.3125rem;
  line-height: 1.3;
  margin-top: var(--s-6);
  margin-bottom: var(--s-3);
}

h4 {
  font-size: 1.125rem;
  line-height: 1.4;
  margin-top: var(--s-5);
  margin-bottom: var(--s-2);
}

p { margin: 0 0 var(--s-5); }

ul, ol { margin: 0 0 var(--s-5); padding-left: var(--s-5); }
li { margin-bottom: var(--s-2); }
li > ul, li > ol { margin-top: var(--s-2); margin-bottom: 0; }

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

small, .meta {
  font-size: 0.9375rem;   /* 15px */
  font-weight: 500;
  line-height: 1.5;
  color: var(--ink-soft);
}

.lead {
  font-size: 1.375rem;    /* 22px */
  line-height: 1.6;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   4. Links
   -------------------------------------------------------------------------- */

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: var(--accent-tint);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

a:hover {
  color: var(--accent-dark);
  text-decoration-color: currentColor;
}

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

/* --------------------------------------------------------------------------
   5. Layout shell
   -------------------------------------------------------------------------- */

.wrap {
  width: 100%;
  max-width: var(--reading-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

main {
  flex: 1 0 auto;
  padding: var(--s-7) 0 var(--s-9);
}

/* --------------------------------------------------------------------------
   6. Header & navigation
   -------------------------------------------------------------------------- */

/* The bar stays put at the top of the window while you scroll. Kept deliberately
   short so it never eats much of a phone screen — the breathing room that used to
   live up here now sits below it, at the top of <main>. */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-1) var(--s-4);
  padding-top: var(--s-2);
  padding-bottom: var(--s-2);
}

.site-title {
  font-family: var(--font-display);
  font-size: 1.375rem;
  line-height: 1.2;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.site-title:hover { color: var(--accent); }

.site-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--s-3);
}

.site-nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  padding: var(--s-2) 0;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover { color: var(--accent); }

.site-nav a[aria-current="page"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.theme-toggle {
  background: none;
  border: 0;
  padding: var(--s-2);
  margin: 0;
  cursor: pointer;
  color: var(--ink-soft);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1;
  border-radius: 6px;
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover { color: var(--accent); background: var(--accent-tint); }
.theme-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* --------------------------------------------------------------------------
   7. Prose (post & page bodies)
   -------------------------------------------------------------------------- */

.prose > *:first-child { margin-top: 0; }
.prose > *:last-child { margin-bottom: 0; }

.prose blockquote {
  margin: var(--s-6) 0;
  padding: var(--s-4) var(--s-5);
  border-left: 3px solid var(--accent);
  background: var(--accent-tint);
  border-radius: 0 8px 8px 0;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.375rem;
  line-height: 1.5;
  color: var(--ink);
}

.prose blockquote p:last-child { margin-bottom: 0; }

.prose code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
}

.prose pre {
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: var(--s-5);
  overflow-x: auto;
  margin: var(--s-6) 0;
  font-size: 1rem;
  line-height: 1.6;
}

.prose pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
}

.prose img {
  border-radius: 12px;
  margin: var(--s-6) 0;
  display: block;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--s-6) 0;
  font-size: 1rem;
}

.prose th, .prose td {
  text-align: left;
  padding: var(--s-3) var(--s-4);
  border-bottom: 1px solid var(--line);
}

.prose th {
  font-weight: 600;
  color: var(--ink-soft);
  font-size: 0.9375rem;
}

.table-scroll { overflow-x: auto; margin: var(--s-6) 0; }
.table-scroll table { margin: 0; }

/* --------------------------------------------------------------------------
   8. Post & page headers
   -------------------------------------------------------------------------- */

.page-header { margin-bottom: var(--s-7); }

.page-header h1 { margin-bottom: var(--s-3); }

.page-header .meta {
  display: block;
  color: var(--ink-faint);
}

.tag {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 1px var(--s-3);
  margin-right: var(--s-2);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   9. Post lists
   -------------------------------------------------------------------------- */

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

.post-list > li { margin: 0 0 var(--s-6); }

.post-list h2,
.post-list h3 {
  font-size: 1.375rem;
  line-height: 1.3;
  margin: 0 0 var(--s-1);
}

.post-list a { text-decoration: none; color: var(--ink); }
.post-list a:hover { color: var(--accent); }

.post-list .meta { display: block; margin-bottom: var(--s-2); }

.post-list p { margin: var(--s-2) 0 0; color: var(--ink-soft); font-size: 1.0625rem; }

/* Card variant — used on the homepage */
.card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: var(--s-5);
  box-shadow: var(--shadow-1);
  text-decoration: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.card:hover {
  border-color: var(--accent-tint);
  box-shadow: var(--shadow-2);
  transform: translateY(-1px);
}

.card h3 {
  font-family: var(--font-display);
  font-size: 1.375rem;
  margin: 0 0 var(--s-1);
  color: var(--ink);
}

.card .meta { display: block; margin-bottom: var(--s-2); }
.card p { margin: 0; color: var(--ink-soft); font-size: 1.0625rem; }

/* --------------------------------------------------------------------------
   10. Bookshelf
   -------------------------------------------------------------------------- */

.book-group { margin-bottom: var(--s-7); }

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

.book-list li {
  margin-bottom: var(--s-4);
  padding-bottom: var(--s-4);
  border-bottom: 1px solid var(--line);
}

.book-list li:last-child { border-bottom: 0; }

.book-title {
  font-family: var(--font-display);
  font-size: 1.1875rem;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
}

.book-title:hover { color: var(--accent); }

.book-author { color: var(--ink-soft); font-size: 1rem; }

.stars { color: var(--accent); font-size: 0.9375rem; letter-spacing: 1px; }

/* --------------------------------------------------------------------------
   11. Buttons
   -------------------------------------------------------------------------- */

.button {
  display: inline-block;
  background: var(--accent);
  color: var(--paper);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 1rem;
  padding: 12px 22px;
  border-radius: 8px;
  border: 0;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.15s ease;
}

.button:hover {
  background: var(--accent-dark);
  color: var(--paper);
  transform: translateY(-1px);
}

.button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.button-soft {
  background: var(--accent-tint);
  color: var(--accent-dark);
  border: 1px solid var(--accent);
}

.button-soft:hover { background: var(--accent-tint); color: var(--accent-dark); }

/* --------------------------------------------------------------------------
   12. Footer
   -------------------------------------------------------------------------- */

.site-footer {
  flex-shrink: 0;
  border-top: 1px solid var(--line);
  padding: var(--s-6) 0;
  color: var(--ink-faint);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.site-footer a { color: var(--ink-soft); text-decoration-color: var(--line); }
.site-footer a:hover { color: var(--accent); }

.site-footer p { margin: 0 0 var(--s-2); }
.site-footer p:last-child { margin-bottom: 0; }

/* --------------------------------------------------------------------------
   13. Responsive — scale up, never down
   -------------------------------------------------------------------------- */

@media (min-width: 640px) {
  :root { --gutter: var(--s-6); }
  h1 { font-size: 2.5rem; }
  h2 { font-size: 1.75rem; }

  .site-header .wrap {
    padding-top: var(--s-3);
    padding-bottom: var(--s-3);
  }
  .site-nav { gap: var(--s-5); }
  .site-nav a { font-size: 1rem; }
}

@media (min-width: 1024px) {
  :root { --gutter: var(--s-7); }
  h1 { font-size: 3rem; }       /* 48px */
  h2 { font-size: 2rem; }       /* 32px */
  h3 { font-size: 1.5rem; }     /* 24px */
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}