/* Hand-written, no build step. Loosely follows IBM Carbon Design System
   tokens (type, color, spacing, motion) without pulling in @carbon/styles. */

/* Self-hosted, latin subset only (this site is English-only). Weights match
   what's actually used below: Sans 300/400/500 (one variable-font file
   covers all three), Mono 400/500. */
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 300 500;
  font-display: swap;
  src: url("/fonts/ibm-plex-sans-latin-var.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-400-latin.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-500-latin.woff2") format("woff2");
}

:root {
  --font-sans: "IBM Plex Sans", -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --bg: #ffffff;
  --bg-subtle: #f4f4f4;
  --text: #161616;
  --text-secondary: #525252;
  --border: #e0e0e0;
  --link: #0f62fe;
  --link-hover: #0043ce;
  --focus: #0f62fe;

  --max-width: 56rem;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4rem;
  --space-8: 6rem;

  --ease-standard: cubic-bezier(0.2, 0, 0.38, 0.9);
}

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

html { color-scheme: light; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 0.15em;
  transition: color 70ms var(--ease-standard);
}
a:hover { color: var(--link-hover); }

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

h1, h2, h3 {
  font-weight: 400;
  line-height: 1.2;
  margin: 0;
}

/* ---- header ---- */

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

.site-header__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-3);
}

.site-header__mark {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.site-nav a {
  color: var(--text-secondary);
  text-decoration: none;
}
.site-nav a:hover { color: var(--text); }
.site-nav a[aria-current="page"] { color: var(--text); border-bottom: 2px solid var(--link); }

/* ---- hero ---- */

.hero {
  padding-block: var(--space-8) var(--space-7);
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0 0 var(--space-3);
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 300;
  letter-spacing: -0.02em;
}

.hero__body {
  max-width: 40rem;
  margin-top: var(--space-4);
  color: var(--text-secondary);
  font-size: 1.125rem;
}

.hero__body p:first-child { margin-top: 0; }

/* ---- section ---- */

.section { padding-block: var(--space-7); }

.section__head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.section__index {
  font-family: var(--font-mono);
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.section__heading {
  font-size: 1.5rem;
  font-weight: 400;
}

.section__all {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  text-decoration: none;
  white-space: nowrap;
}

/* ---- entry list (projects) ---- */

.entry-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--border);
}

.entry-list__item {
  border-bottom: 1px solid var(--border);
  padding-block: var(--space-4);
}

.entry-list__link {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-4);
  text-decoration: none;
  color: var(--text);
}

.entry-list__title {
  font-size: 1.125rem;
}

.entry-list__date {
  font-family: var(--font-mono);
  color: var(--text-secondary);
  font-size: 0.875rem;
  white-space: nowrap;
}

.entry-list__external {
  color: var(--text-secondary);
  font-size: 0.75em;
}

.entry-list__summary {
  margin: var(--space-2) 0 0;
  color: var(--text-secondary);
  max-width: 40rem;
}

/* ---- single / list pages ---- */

.page { padding-block: var(--space-7); }

.page__title {
  font-size: 2.5rem;
  font-weight: 300;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-4);
}

.page__body {
  max-width: 40rem;
  color: var(--text-secondary);
}

.page__body :is(h2, h3) {
  color: var(--text);
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
}

.page__body p { margin: 0 0 var(--space-3); }

.project-meta {
  display: flex;
  gap: var(--space-3);
  align-items: center;
  margin-bottom: var(--space-5);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.tag {
  border: 1px solid var(--border);
  padding: 0.1rem 0.5rem;
}

/* ---- footer ---- */

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

.site-footer__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  padding-block: var(--space-4);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.site-footer__links {
  display: flex;
  gap: var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer__links a { color: var(--text-secondary); }
.site-footer__links a:hover { color: var(--text); }

@media (max-width: 40rem) {
  .site-header__row, .site-footer__row { flex-direction: column; align-items: flex-start; gap: var(--space-2); }
  .section__head { grid-template-columns: auto 1fr; }
  .section__all { grid-column: 1 / -1; }
  .entry-list__link { flex-direction: column; align-items: flex-start; gap: var(--space-1); }
}