/* ============================================================
   blog.tombigel.com — style.css
   Modern typography-first theme inspired by the classic palette.
   Uses logical properties throughout for RTL/LTR support.
   Zero JavaScript. No external dependencies.
   ============================================================ */

/* ------------------------------------------------------------
   Custom properties — Light mode
   ------------------------------------------------------------ */
:root {
  /* Palette */
  --color-bg:           #faf9f6;
  --color-surface:      #ffffff;
  --color-text:         #333333;
  --color-muted:        #666666;
  --color-subtle:       #999999;
  --color-border:       #dddddd;
  --color-link:         #19365d;
  --color-link-hover:   #2767c1;
  --color-accent:       #711d1d;
  --color-code-bg:      #f0eeea;
  --color-header-bg:    #19365d;
  --color-header-text:  #f0f4fa;
  --color-header-link:  #c8d8f0;
  --color-header-hover: #ffffff;
  --color-tag-bg:       #e8edf5;
  --color-tag-text:     #19365d;

  /* Typography */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "Fira Code", Menlo, Consolas, monospace;

  --text-base:   1rem;       /* 16px */
  --text-sm:     0.875rem;
  --text-xs:     0.75rem;
  --text-h1:     clamp(1.75rem, 4vw, 2.5rem);
  --text-h2:     clamp(1.35rem, 3vw, 1.875rem);
  --text-h3:     clamp(1.1rem,  2.5vw, 1.375rem);
  --text-site:   clamp(1.25rem, 3vw, 1.75rem);

  --leading-tight:  1.25;
  --leading-normal: 1.6;
  --leading-loose:  1.8;

  /* Spacing */
  --space-1:   0.25rem;
  --space-2:   0.5rem;
  --space-3:   0.75rem;
  --space-4:   1rem;
  --space-5:   1.25rem;
  --space-6:   1.5rem;
  --space-8:   2rem;
  --space-10:  2.5rem;
  --space-12:  3rem;
  --space-16:  4rem;

  /* Layout */
  --measure:        68ch;
  --measure-wide:   80ch;
  --radius:         4px;
  --radius-lg:      8px;
  --border-width:   1px;
  --accent-border:  3px;
}

/* ------------------------------------------------------------
   Dark mode
   ------------------------------------------------------------ */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg:           #12110e;
    --color-surface:      #1c1a16;
    --color-text:         #e8e4dc;
    --color-muted:        #a09890;
    --color-subtle:       #6a6058;
    --color-border:       #2e2c28;
    --color-link:         #7faad8;
    --color-link-hover:   #adc8f0;
    --color-accent:       #c05050;
    --color-code-bg:      #221f1a;
    --color-header-bg:    #0d1a2e;
    --color-header-text:  #c8d8f0;
    --color-header-link:  #8ab0d8;
    --color-header-hover: #dde8f8;
    --color-tag-bg:       #1a2030;
    --color-tag-text:     #8ab0d8;
  }
}

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

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

body {
  margin: 0;
  padding: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  min-block-size: 100dvh;
  display: flex;
  flex-direction: column;
}

/* ------------------------------------------------------------
   Links
   ------------------------------------------------------------ */
a {
  color: var(--color-link);
  text-underline-offset: 0.2em;
  text-decoration-thickness: 1px;
  transition: color 0.15s ease;
}

a:hover,
a:focus-visible {
  color: var(--color-link-hover);
  text-decoration-thickness: 2px;
}

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

/* ------------------------------------------------------------
   Site header
   ------------------------------------------------------------ */
.site-header {
  background-color: var(--color-header-bg);
  color: var(--color-header-text);
  padding-block: var(--space-4);
  padding-inline: var(--space-6);
}

.site-header__inner {
  max-inline-size: var(--measure-wide);
  margin-inline: auto;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-8);
}

.site-header__title {
  font-size: var(--text-site);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: -0.01em;
}

.site-header__title a {
  color: var(--color-header-text);
  text-decoration: none;
}

.site-header__title a:hover,
.site-header__title a:focus-visible {
  color: var(--color-header-hover);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.site-nav {
  display: flex;
  gap: var(--space-5);
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--color-header-link);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  padding-block: var(--space-1);
  border-block-end: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a[aria-current="page"] {
  color: var(--color-header-hover);
  border-block-end-color: var(--color-link-hover);
  outline: none;
}

/* ------------------------------------------------------------
   Main content
   ------------------------------------------------------------ */
main {
  flex: 1;
  padding-block: var(--space-10) var(--space-16);
  padding-inline: var(--space-6);
}

.content {
  max-inline-size: var(--measure);
  margin-inline: auto;
}

/* ------------------------------------------------------------
   Page / section headings
   ------------------------------------------------------------ */
.page-title {
  font-size: var(--text-h1);
  font-weight: 800;
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
  margin-block: 0 var(--space-4);
  color: var(--color-text);
}

.page-description {
  font-size: 1.1rem;
  color: var(--color-muted);
  margin-block: 0 var(--space-10);
  line-height: var(--leading-loose);
}

/* ------------------------------------------------------------
   Post list (index + archive)
   ------------------------------------------------------------ */
.post-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.post-list__item {
  border-block-end: var(--border-width) solid var(--color-border);
  padding-block: var(--space-6);
}

.post-list__item:first-child {
  border-block-start: var(--border-width) solid var(--color-border);
}

.post-list__item:hover {
  background-color: var(--color-surface);
  margin-inline: calc(var(--space-4) * -1);
  padding-inline: var(--space-4);
  border-radius: var(--radius-lg);
  border-color: transparent;
}

.post-list__title {
  font-size: clamp(1.05rem, 2.5vw, 1.2rem);
  font-weight: 600;
  line-height: var(--leading-tight);
  margin-block: 0 var(--space-2);
}

.post-list__title a {
  color: var(--color-text);
  text-decoration: none;
}

.post-list__title a:hover,
.post-list__title a:focus-visible {
  color: var(--color-link-hover);
  text-decoration: underline;
}

.post-list__meta {
  font-size: var(--text-sm);
  color: var(--color-muted);
  margin-block: 0 var(--space-2);
}

.post-list__excerpt {
  font-size: var(--text-sm);
  color: var(--color-muted);
  margin-block: var(--space-2) 0;
  line-height: var(--leading-normal);
}

/* ------------------------------------------------------------
   Post navigation — older / newer
   ------------------------------------------------------------ */
.post-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-block: var(--space-12) 0;
  padding-block-start: var(--space-6);
  border-block-start: var(--border-width) solid var(--color-border);
}

.post-nav__side {
  flex: 1 1 0;
  min-inline-size: 40%;
}

.post-nav__side--next {
  text-align: end;
}

.post-nav__link {
  display: inline-flex;
  flex-direction: column;
  gap: var(--space-1);
  text-decoration: none;
  color: var(--color-text);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  padding-block: var(--space-3);
  padding-inline: var(--space-4);
  max-inline-size: 100%;
}

.post-nav__link:hover,
.post-nav__link:focus-visible {
  border-color: var(--color-link-hover);
  background-color: var(--color-surface);
}

.post-nav__label {
  font-size: var(--text-xs);
  color: var(--color-subtle);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.post-nav__title {
  font-weight: 600;
  line-height: var(--leading-tight);
  color: var(--color-link);
}

.post-nav__link:hover .post-nav__title,
.post-nav__link:focus-visible .post-nav__title {
  color: var(--color-link-hover);
}

/* ------------------------------------------------------------
   Archive — year groups
   ------------------------------------------------------------ */
.archive-year {
  margin-block: var(--space-10) var(--space-4);
}

.archive-year__heading {
  font-size: var(--text-h2);
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--color-muted);
  margin-block: 0 var(--space-3);
  padding-block-end: var(--space-2);
  border-block-end: 2px solid var(--color-border);
}

.archive-year:first-of-type .archive-year__heading {
  margin-block-start: 0;
}

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

.archive-list__item {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  padding-block: var(--space-2);
  border-block-end: var(--border-width) solid var(--color-border);
}

.archive-list__date {
  flex-shrink: 0;
  font-size: var(--text-sm);
  color: var(--color-subtle);
  font-variant-numeric: tabular-nums;
  min-inline-size: 7ch;
}

.archive-list__title {
  font-size: var(--text-base);
  line-height: var(--leading-tight);
}

/* ------------------------------------------------------------
   Article / post content
   ------------------------------------------------------------ */
article.post {
  max-inline-size: var(--measure);
  margin-inline: auto;
}

.post__header {
  margin-block-end: var(--space-8);
  padding-block-end: var(--space-6);
  border-block-end: var(--border-width) solid var(--color-border);
}

.post__title {
  font-size: var(--text-h1);
  font-weight: 800;
  line-height: var(--leading-tight);
  letter-spacing: -0.025em;
  margin-block: 0 var(--space-4);
}

.post__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-muted);
}

.post__date {
  font-variant-numeric: tabular-nums;
}

/* Tags */
.post__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}

.post__tag {
  display: inline-block;
  background-color: var(--color-tag-bg);
  color: var(--color-tag-text);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding-block: var(--space-1);
  padding-inline: var(--space-2);
  border-radius: var(--radius);
  text-decoration: none;
}

.post__tag:hover,
.post__tag:focus-visible {
  background-color: var(--color-link);
  color: #ffffff;
}

/* ------------------------------------------------------------
   Prose body (content rendered from markdown)
   ------------------------------------------------------------ */
.post__body {
  line-height: var(--leading-loose);
}

.post__body > * + * {
  margin-block-start: var(--space-5);
}

.post__body h2 {
  font-size: var(--text-h2);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: var(--leading-tight);
  margin-block: var(--space-10) var(--space-3);
  color: var(--color-text);
}

.post__body h3 {
  font-size: var(--text-h3);
  font-weight: 600;
  line-height: var(--leading-tight);
  margin-block: var(--space-8) var(--space-2);
  color: var(--color-text);
}

.post__body h4,
.post__body h5,
.post__body h6 {
  font-size: 1rem;
  font-weight: 600;
  margin-block: var(--space-6) var(--space-2);
}

.post__body p {
  margin-block: 0;
}

.post__body ul,
.post__body ol {
  padding-inline-start: var(--space-6);
}

.post__body li + li {
  margin-block-start: var(--space-2);
}

.post__body blockquote {
  margin-inline: 0;
  padding-inline-start: var(--space-5);
  border-inline-start: var(--accent-border) solid var(--color-accent);
  color: var(--color-muted);
  font-style: italic;
}

.post__body blockquote p {
  margin-block: 0;
}

.post__body a {
  color: var(--color-link);
}

.post__body a:hover {
  color: var(--color-link-hover);
}

/* Inline code */
.post__body code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--color-code-bg);
  color: var(--color-accent);
  padding-block: 0.1em;
  padding-inline: 0.35em;
  border-radius: var(--radius);
  border: var(--border-width) solid var(--color-border);
  word-break: break-word;
}

/* Code blocks */
.post__body pre {
  background-color: var(--color-code-bg);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  overflow-x: auto;
  font-size: var(--text-sm);
  line-height: 1.5;
  /* Prevent overflow on mobile */
  max-inline-size: 100%;
  white-space: pre;
}

.post__body pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--color-text);
  font-size: inherit;
  word-break: normal;
}

/* Images */
.post__body img {
  max-inline-size: 100%;
  block-size: auto;
  border-radius: var(--radius-lg);
  border: var(--border-width) solid var(--color-border);
  display: block;
}

/* Horizontal rule */
.post__body hr {
  border: none;
  border-block-start: var(--border-width) solid var(--color-border);
  margin-block: var(--space-10);
}

/* Tables */
.post__body table {
  inline-size: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
  overflow-x: auto;
  display: block;
}

.post__body th,
.post__body td {
  padding-block: var(--space-2);
  padding-inline: var(--space-3);
  text-align: start;
  border-block-end: var(--border-width) solid var(--color-border);
}

.post__body th {
  font-weight: 600;
  border-block-end-width: 2px;
}

/* ------------------------------------------------------------
   404 page
   ------------------------------------------------------------ */
.page-404 {
  text-align: center;
  padding-block: var(--space-16);
}

.page-404__code {
  font-size: clamp(4rem, 15vw, 8rem);
  font-weight: 900;
  line-height: 1;
  color: var(--color-border);
  letter-spacing: -0.04em;
  margin-block: 0 var(--space-4);
  display: block;
}

.page-404__heading {
  font-size: var(--text-h2);
  font-weight: 700;
  margin-block: 0 var(--space-4);
}

.page-404__message {
  color: var(--color-muted);
  margin-block: 0 var(--space-8);
}

/* ------------------------------------------------------------
   Footer
   ------------------------------------------------------------ */
.site-footer {
  padding-block: var(--space-6);
  padding-inline: var(--space-6);
  border-block-start: var(--border-width) solid var(--color-border);
  font-size: var(--text-sm);
  color: var(--color-subtle);
  text-align: center;
}

.site-footer a {
  color: var(--color-subtle);
}

.site-footer a:hover {
  color: var(--color-muted);
}

/* ------------------------------------------------------------
   Responsive tweaks
   ------------------------------------------------------------ */
@media (max-width: 600px) {
  .site-header__inner {
    flex-direction: column;
    gap: var(--space-3);
  }

  .post-list__item:hover {
    margin-inline: 0;
    padding-inline: 0;
    background-color: transparent;
  }

  .archive-list__item {
    flex-direction: column;
    gap: var(--space-1);
  }
}

/* ------------------------------------------------------------
   Print
   ------------------------------------------------------------ */
@media print {
  .site-header,
  .site-footer,
  .site-nav {
    display: none;
  }

  body {
    background: white;
    color: black;
    font-size: 12pt;
  }

  a {
    color: black;
    text-decoration: underline;
  }
}