/* ==========================================================================
   Design system — flat Swiss/brutalist "engineering document" aesthetic.
   White/grey field with a burgundy accent. Palette is our own.
   ========================================================================== */

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

* {
  margin: 0;
}

/* --- Fonts ---------------------------------------------------------------- */
/* IBM Plex, self-hosted. Latin subset, woff2. SIL Open Font License 1.1
   (see src/assets/fonts/LICENSE). Source: Fontsource. */

@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/ibm-plex-sans-latin-400-normal.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("../fonts/ibm-plex-sans-latin-600-normal.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("../fonts/ibm-plex-sans-latin-700-normal.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Sans Condensed";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("../fonts/ibm-plex-sans-condensed-latin-700-normal.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2");
}

/* --- Tokens --------------------------------------------------------------- */
:root {
  --black: #000;
  --white: #fff;
  --ink: #000;
  --paper: #fff;

  --accent: #800020;
  --accent-dark: #4d0013;
  --accent-mid: #a32647;
  --accent-soft: #f5e6ea;
  --accent-line: #d78a9c;

  --gray-050: #f6f6f6;
  --gray-100: #eee;
  --gray-200: #ccc;
  --gray-300: #bbb;
  --gray-400: #999;
  --gray-500: #777;
  --gray-600: #555;

  --shadow: 2px 2px 0 var(--gray-300);
  --border: 1px solid var(--black);
  --dotted: radial-gradient(var(--gray-500) 0.5px, transparent 1px) 0 0 / 3px 3px;

  --font-condensed: "IBM Plex Sans Condensed", "Helvetica Neue",
    "Arial Narrow", sans-serif;
  --font-sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", SFMono-Regular, Menlo,
    Consolas, "Liberation Mono", monospace;

  --step: 1.5rem;
  --max-width: 60rem;

  --colorscale: linear-gradient(
    90deg,
    #2b060f 0 10%,
    #460a18 10% 20%,
    #5f0e21 20% 30%,
    #78122b 30% 40%,
    #8c1c39 40% 50%,
    #a03453 50% 60%,
    #b35671 60% 70%,
    #c57e93 70% 80%,
    #d8a7b5 80% 90%,
    #f0dee3 90% 100%
  );
}

/* --- Base ----------------------------------------------------------------- */
html {
  font-size: 100%;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--ink);
  background: var(--accent-soft);
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

code,
pre,
kbd,
samp {
  font-family: var(--font-mono);
}

/* --- Layout --------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.grid {
  display: grid;
  gap: var(--step);
}

.grid--2 {
  grid-template-columns: 1fr 1fr;
}

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.stack > * + * {
  margin-top: 0.85rem;
}

.mt-2 {
  margin-top: var(--step);
}

.mb-2 {
  margin-bottom: var(--step);
}

.mono {
  font-family: var(--font-mono);
}

.skip-link {
  position: absolute;
  left: -9999px;
  background: var(--accent);
  color: var(--white);
  padding: 0.4rem 0.75rem;
}

.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
  z-index: 10;
}

/* --- Top status bar ------------------------------------------------------- */
.topbar {
  background: var(--black);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.topbar__inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.3rem;
}

.topbar__status {
  color: var(--accent-line);
}

/* --- Masthead ------------------------------------------------------------- */
.masthead {
  border-bottom: var(--border);
  padding-block: 1rem 0.9rem;
}

.masthead__logo {
  margin-bottom: 0.9rem;
}

.logotype {
  text-decoration: none;
  color: var(--ink);
}

.logotype:hover {
  background: none;
}

.logotype h1 {
  font-family: var(--font-condensed);
  font-weight: 700;
  font-size: clamp(1.6rem, 4.5vw, 2.5rem);
  line-height: 1;
  letter-spacing: -0.015em;
  text-transform: lowercase;
}

.colorscale {
  height: 8px;
  background: var(--colorscale);
  margin-top: 0.6rem;
  border: 1px solid var(--black);
}

/* --- Nav ------------------------------------------------------------------ */
.nav {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.btn-nav {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
  background: var(--white);
  border: var(--border);
  padding: 0.32rem 0.7rem 0.28rem;
  box-shadow: var(--shadow);
  position: relative;
}

.btn-nav:hover {
  background: var(--black);
  color: var(--white);
  text-decoration: none;
}

.btn-nav.is-active {
  background: var(--accent);
  color: var(--white);
  box-shadow: 2px 2px 0 var(--black);
}

.btn-nav.is-active:hover {
  background: var(--black);
  color: var(--accent-line);
}

/* --- Section headings ----------------------------------------------------- */
main {
  flex: 1 0 auto;
  padding-block: 2.5rem 3rem;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.section-head h2 {
  font-family: var(--font-condensed);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  line-height: 1;
}

.section-head__index {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--gray-500);
}

.rule {
  border: 0;
  height: 3px;
  background: var(--dotted);
  margin: 0.6rem 0 var(--step);
}

/* --- Panels --------------------------------------------------------------- */
.panel {
  border: var(--border);
  padding: 1rem 1.1rem;
}

.panel--silver {
  background: var(--gray-100);
  border: 0;
}

.panel-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--gray-600);
  margin-bottom: 0.6rem;
}

/* --- Tables (stacked silver bars) ---------------------------------------- */
.table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0 0.3rem;
  font-size: 0.85rem;
}

.table td,
.table th {
  text-align: left;
  padding: 0.4rem 0.55rem;
  background: var(--gray-100);
  border: 0;
}

.table th {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--gray-600);
  background: var(--white);
  padding-left: 0;
}

.table--kv td:first-child {
  width: 34%;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--gray-600);
}

/* --- Banner --------------------------------------------------------------- */
.banner {
  border: var(--border);
  border-left: 6px solid var(--accent);
  padding: 1rem 1.1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.banner__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}

.banner__title {
  font-family: var(--font-condensed);
  font-weight: 700;
  font-size: 1.25rem;
  text-transform: uppercase;
}

.banner__text {
  color: var(--gray-600);
  font-size: 0.88rem;
}

/* --- Cards (projects) ----------------------------------------------------- */
.cards {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 1rem;
}

@media (min-width: 40rem) {
  .cards {
    grid-template-columns: 1fr 1fr;
  }
}

.card a {
  display: block;
  height: 100%;
  border: var(--border);
  padding: 0.9rem 1rem;
  color: var(--ink);
  text-decoration: none;
  background: var(--white);
}

.card a:hover {
  background: var(--white);
  color: var(--ink);
  box-shadow: var(--shadow);
  transform: translate(-1px, -1px);
}

.card h2,
.card h3 {
  font-family: var(--font-condensed);
  font-weight: 700;
  font-size: 1.1rem;
  text-transform: uppercase;
  line-height: 1.1;
  margin-bottom: 0.35rem;
}

.card p {
  font-size: 0.86rem;
  color: var(--gray-600);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.65rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  border: 1px solid var(--black);
  padding: 0.08rem 0.4rem;
  background: var(--gray-100);
}

/* --- Post list (dense rows) ---------------------------------------------- */
.post-list {
  list-style: none;
  padding: 0;
  border-top: var(--border);
}

.post-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.25rem 1rem;
  padding: 0.55rem 0.25rem;
  border-bottom: 1px solid var(--gray-200);
}

.post-list a {
  font-weight: 600;
  text-decoration: none;
}

.post-list time {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  color: var(--gray-500);
  white-space: nowrap;
}

.post-list__desc {
  flex-basis: 100%;
  font-size: 0.85rem;
  color: var(--gray-600);
}

/* --- Buttons -------------------------------------------------------------- */
.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
  background: var(--white);
  border: var(--border);
  padding: 0.4rem 0.8rem 0.35rem;
  box-shadow: var(--shadow);
  cursor: pointer;
}

.btn:hover {
  background: var(--black);
  color: var(--white);
  text-decoration: none;
}

.btn--accent {
  background: var(--accent);
  color: var(--white);
}

.btn--accent:hover {
  background: var(--accent-dark);
  color: var(--white);
}

/* --- Prose ---------------------------------------------------------------- */
.prose p,
.prose ul,
.prose ol {
  margin-block: 0.85rem;
}

.prose ul,
.prose ol {
  padding-left: 1.2rem;
}

.prose h2,
.prose h3 {
  font-family: var(--font-condensed);
  text-transform: uppercase;
  letter-spacing: -0.005em;
  line-height: 1.15;
  margin-top: 2rem;
}

.prose h2 {
  font-size: 1.25rem;
}

.prose h3 {
  font-size: 1.05rem;
}

.prose code {
  font-size: 0.85em;
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  padding: 0.05em 0.3em;
}

.prose pre {
  background: var(--gray-050);
  border: var(--border);
  padding: 0.9rem 1rem;
  overflow-x: auto;
}

.prose pre code {
  background: none;
  border: 0;
  padding: 0;
}

.prose blockquote {
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  padding: 0.75rem 1rem;
  margin: 1.2rem 0;
}

.prose hr {
  border: 0;
  height: 3px;
  background: var(--dotted);
  margin: 2rem 0;
}

.lede {
  font-size: 1.1rem;
  line-height: 1.4;
  font-weight: 600;
}

/* --- Article headers ------------------------------------------------------ */
.article-header {
  border-bottom: var(--border);
  padding-bottom: 0.9rem;
  margin-bottom: var(--step);
}

.article-header h1 {
  font-family: var(--font-condensed);
  font-weight: 700;
  font-size: clamp(1.5rem, 4.5vw, 2.2rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--gray-500);
}

.back-link {
  margin-top: 2.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
}

/* --- Footer --------------------------------------------------------------- */
.site-footer {
  border-top: var(--border);
  padding-block: 1.2rem 1.5rem;
  margin-top: 1rem;
}

.site-footer .colorscale {
  margin-bottom: 0.9rem;
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--gray-600);
}

.site-footer__links {
  display: flex;
  gap: 1rem;
}

/* --- Responsive ----------------------------------------------------------- */
@media (max-width: 48rem) {
  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }
}

/* --- Print ---------------------------------------------------------------- */
@media print {
  .topbar,
  .site-footer,
  .back-link {
    display: none;
  }

  .masthead {
    border-bottom: 2px solid #000;
  }
}