/* =========================================================================
   Little Earth — Field Notes (blog)
   Dark "relief map" theme. Loads AFTER site.css (reuses its tokens,
   .field background, .masthead and .colophon).
   ========================================================================= */

/* ---- Blog index listing ------------------------------------------------- */
.post-list {
  max-width: var(--maxw); margin: 0 auto; padding-bottom: clamp(3rem, 8vw, 6rem);
  display: grid; gap: 1.25rem;
}
.post-item {
  display: grid; grid-template-columns: 160px 1fr; gap: 1.6rem; align-items: stretch;
  text-decoration: none; color: inherit;
  border: 1px solid var(--panel-edge); border-radius: var(--radius); overflow: hidden;
  background: linear-gradient(180deg, rgba(17,26,35,.72), rgba(12,18,24,.7));
  transition: transform .25s var(--ease), border-color .25s var(--ease);
}
.post-item:hover { transform: translateY(-3px); border-color: var(--land); }
.post-item__thumb { background: #0c1218 center/cover no-repeat; min-height: 130px; }
/* Small line-art diagrams: show the whole figure, centred & inset, not cover-cropped. */
.post-item__thumb--diagram { background-size: 78%; }
.post-item__body { padding: 1.4rem 1.5rem 1.5rem 0; display: flex; flex-direction: column; gap: .5rem; }
.post-item__meta { font-family: var(--mono); font-size: .7rem; letter-spacing: .14em; text-transform: uppercase; color: var(--contour); }
.post-item__title { font-family: var(--display); font-weight: 700; font-size: clamp(1.3rem, 1rem + 1.4vw, 1.9rem); letter-spacing: -.01em; }
.post-item__excerpt { color: var(--ink-dim); }
.post-empty { max-width: var(--maxw); margin: 0 auto 4rem; color: var(--ink-faint); font-family: var(--mono); font-size: .85rem; }

/* ---- Post layout -------------------------------------------------------- */
.post {
  max-width: 52rem; margin: 0 auto; padding-inline: var(--pad);
}
.post-hero { padding-block: clamp(2.5rem, 7vw, 5rem) 1.5rem; }
.post-hero__crumbs { font-family: var(--mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 1.4rem; }
.post-hero__crumbs a { color: var(--contour); text-decoration: none; }
.post-hero__crumbs a:hover { text-decoration: underline; text-underline-offset: 3px; }
.post-hero__kicker { font-family: var(--mono); font-size: .72rem; letter-spacing: .16em; text-transform: uppercase; color: var(--land); }
.post-hero__title {
  font-family: var(--display); font-weight: 800;
  font-size: clamp(2.1rem, 1.2rem + 4vw, 3.6rem); line-height: 1.02; letter-spacing: -.025em;
  margin: 1rem 0 1rem;
}
.post-hero__dek { color: var(--ink-dim); font-size: clamp(1.1rem, 1rem + .5vw, 1.35rem); max-width: 46ch; }
.post-hero__byline {
  margin-top: 1.6rem; padding-top: 1.2rem; border-top: 1px solid var(--panel-edge);
  font-family: var(--mono); font-size: .74rem; letter-spacing: .04em; color: var(--ink-faint);
  display: flex; flex-wrap: wrap; gap: .4rem 1.2rem;
}
.post-hero__byline strong { color: var(--ink-dim); font-weight: 400; }

/* ---- Article body ------------------------------------------------------- */
.post article { padding-bottom: clamp(3rem, 8vw, 6rem); }
.post article > h2 {
  font-family: var(--display); font-weight: 700; letter-spacing: -.02em;
  font-size: clamp(1.5rem, 1.1rem + 1.8vw, 2.1rem);
  margin: 2.6rem 0 1rem; padding-top: 1.4rem; border-top: 1px solid var(--panel-edge);
}
.post article > h3 {
  font-family: var(--display); font-weight: 700; letter-spacing: -.01em;
  font-size: clamp(1.2rem, 1rem + 1vw, 1.5rem); margin: 2rem 0 .8rem; color: var(--ink);
}
.post article > p { margin: 0 0 1.2rem; color: var(--ink); }
.post article > ul, .post article > ol { margin: 0 0 1.4rem; padding-left: 1.3rem; color: var(--ink); }
.post article li { margin-bottom: .55rem; }
.post article li::marker { color: var(--land); }
.post article strong { color: #fff; font-weight: 600; }
.post article em { color: var(--ink); }
.post article a { color: var(--land); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: rgba(232,116,42,.4); }
.post article a:hover { text-decoration-color: var(--land); }

/* Inline code */
.post article code {
  font-family: var(--mono); font-size: .85em;
  background: rgba(63,209,173,.1); color: var(--contour);
  padding: .12em .4em; border-radius: 5px;
}

/* ---- Callouts ----------------------------------------------------------- */
.info-box {
  border: 1px solid var(--panel-edge); border-left: 3px solid var(--ocean);
  background: linear-gradient(180deg, rgba(43,135,196,.08), rgba(12,18,24,.4));
  border-radius: 10px; padding: 1.2rem 1.4rem; margin: 1.6rem 0;
}
.info-box h4 { font-family: var(--mono); font-size: .76rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ocean); margin-bottom: .5rem; }
.info-box p { margin: 0; color: var(--ink-dim); }
.info-box.warning { border-left-color: var(--land); background: linear-gradient(180deg, rgba(232,116,42,.1), rgba(12,18,24,.4)); }
.info-box.warning h4 { color: var(--land); }
.info-box.success { border-left-color: var(--contour); background: linear-gradient(180deg, rgba(63,209,173,.1), rgba(12,18,24,.4)); }
.info-box.success h4 { color: var(--contour); }

/* ---- Tables ------------------------------------------------------------- */
.tech-specs {
  width: 100%; border-collapse: collapse; margin: 1.4rem 0 1.8rem;
  font-size: .92rem; border: 1px solid var(--panel-edge); border-radius: var(--radius); overflow: hidden;
}
.tech-specs th {
  text-align: left; font-family: var(--mono); font-size: .68rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--land); background: rgba(232,116,42,.07); padding: .7rem .9rem;
}
.tech-specs td { padding: .7rem .9rem; border-top: 1px solid var(--panel-edge); color: var(--ink-dim); }
.tech-specs td:first-child { color: var(--ink); font-weight: 500; }

/* ---- Code blocks -------------------------------------------------------- */
.code-block-title {
  font-family: var(--mono); font-size: .7rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-faint); background: #0a0f14; border: 1px solid var(--panel-edge); border-bottom: 0;
  padding: .55rem .9rem; border-radius: 10px 10px 0 0; margin-top: 1.6rem;
}
.code-block {
  background: #0a0f14; border: 1px solid var(--panel-edge); border-radius: 0 0 10px 10px;
  padding: 1.1rem 1.2rem; overflow-x: auto; margin: 0 0 1.8rem; font-size: .82rem; line-height: 1.6;
}
.code-block code { font-family: var(--mono); color: #cdd6e0; background: none; padding: 0; }
.code-block-title + .code-block { border-radius: 0 0 10px 10px; }
.code-keyword  { color: #ff9b6b; }
.code-function { color: #6cc6ff; }
.code-string   { color: #8ee6b0; }
.code-number   { color: #f0c674; }
.code-property { color: #7fd6c2; }
.code-comment  { color: var(--ink-faint); font-style: italic; }

/* ---- Figures / images --------------------------------------------------- */
.image-container { margin: 1.8rem 0; }
.image-container img {
  width: 100%; height: auto; display: block;
  border: 1px solid var(--panel-edge); border-radius: var(--radius);
  box-shadow: 0 24px 60px -30px rgba(0,0,0,.7);
}
.image-caption, .diagram-caption {
  margin-top: .7rem; font-family: var(--mono); font-size: .74rem; letter-spacing: .02em;
  color: var(--ink-faint); text-align: center;
}
.hero-image img { border-color: var(--land); }

/* Small source diagrams shouldn't upscale to full width — cap, centre, and give
   an opaque backing so transparent PNGs don't reveal the contour background. */
.image-container--small img { max-width: 320px; margin-inline: auto; background: #0a0f14; }

.image-container.expandable { cursor: zoom-in; }
.image-container.expandable img { transition: transform .3s var(--ease), border-color .3s var(--ease); }
.image-container.expandable:hover img { border-color: var(--land); transform: translateY(-2px); }

.image-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin: 1.8rem 0; }
.image-grid .image-container { margin: 0; }

/* Diagram SVGs paint their own light background — frame them as light cards. */
.diagram-container { margin: 1.8rem 0; }
.diagram-container img {
  width: 100%; height: auto; display: block;
  border-radius: var(--radius); border: 1px solid var(--panel-edge);
  box-shadow: 0 24px 60px -30px rgba(0,0,0,.6);
}

.post-back { margin-top: 2.5rem; padding-top: 1.4rem; border-top: 1px solid var(--panel-edge); }
.post-back a { font-family: var(--mono); font-size: .82rem; color: var(--ink-dim); text-decoration: none; }
.post-back a:hover { color: var(--land); }

/* ---- Lightbox ----------------------------------------------------------- */
.lightbox {
  position: fixed; inset: 0; z-index: 1000; display: none;
  background: rgba(6,9,12,.92); backdrop-filter: blur(4px);
  padding: 4vmin; place-items: center; cursor: zoom-out;
}
.lightbox.active { display: grid; }
.lightbox img { max-width: 94vw; max-height: 82vh; border-radius: 10px; border: 1px solid var(--panel-edge); }
.lightbox-caption { margin-top: 1rem; font-family: var(--mono); font-size: .8rem; color: var(--ink-dim); text-align: center; }
.lightbox-close { position: fixed; top: 1.4rem; right: 1.8rem; font-size: 2.4rem; color: var(--ink-dim); cursor: pointer; line-height: 1; }
.lightbox-close:hover { color: #fff; }

@media (max-width: 620px) {
  .post-item { grid-template-columns: 1fr; }
  .post-item__thumb { min-height: 150px; }
  .post-item__body { padding: 0 1.4rem 1.4rem; }
  .image-grid { grid-template-columns: 1fr; }
}