/* ==========================================================================
   Design tokens
   Subject: satellite remote sensing / EO data science.
   Signature: a "band-composite" strip (false-color RGB stacking) on every
   card, and a dashed "orbit line" used as the site's section divider.
   ========================================================================== */
:root {
  --bg: #0d1321;
  --bg-alt: #131b2e;
  --bg-card: #111a2c;
  --ink: #eaedf3;
  --ink-dim: #93a0b8;
  --ink-faint: #5c6b87;
  --accent-amber: #e8a33d;
  --accent-cyan: #4fd1c5;
  --accent-rose: #d97a8f;
  --line: #26314a;
  --radius: 3px;
  --font-display: "Space Grotesk", "Arial Narrow", sans-serif;
  --font-body: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --maxw: 740px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.65;
  margin: 0;
  -webkit-font-smoothing: antialiased;
}

body::before {
  /* faint scanline field, evokes a satellite swath pass */
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.015) 0px,
    rgba(255, 255, 255, 0.015) 1px,
    transparent 1px,
    transparent 3px
  );
  z-index: 0;
}

a { color: var(--accent-cyan); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent-amber); outline-offset: 2px; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
}

code, pre, kbd { font-family: var(--font-mono); }
pre {
  background: #0a0f1c;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.85rem;
}
code { font-size: 0.88em; }
:not(pre) > code {
  background: rgba(79, 209, 197, 0.1);
  color: var(--accent-cyan);
  padding: 0.1em 0.35em;
  border-radius: 2px;
}

img { max-width: 100%; height: auto; border-radius: var(--radius); }
blockquote {
  border-left: 2px solid var(--accent-amber);
  margin: 1.5rem 0;
  padding: 0.2rem 0 0.2rem 1.2rem;
  color: var(--ink-dim);
  font-style: italic;
}
hr { border: none; border-top: 1px solid var(--line); margin: 2.5rem 0; }

/* ---------- layout shell ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 1.5rem; position: relative; z-index: 1; }

.site-header {
  border-bottom: 1px solid var(--line);
  padding: 1.1rem 0;
  background: linear-gradient(to bottom, var(--bg-alt), var(--bg));
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.site-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.site-title small {
  display: block;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.68rem;
  color: var(--accent-cyan);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 0.15rem;
}
.site-title:hover { text-decoration: none; }

nav.main-menu { display: flex; align-items: center; gap: 1.4rem; flex-wrap: wrap; }
nav.main-menu a {
  color: var(--ink-dim);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
nav.main-menu a:hover, nav.main-menu a.active { color: var(--accent-amber); text-decoration: none; }

.lang-switch { display: flex; gap: 0.5rem; font-family: var(--font-mono); font-size: 0.72rem; }
.lang-switch a { color: var(--ink-faint); border: 1px solid var(--line); padding: 0.1rem 0.4rem; border-radius: 2px; }
.lang-switch a.current, .lang-switch a:hover { color: var(--accent-cyan); border-color: var(--accent-cyan); text-decoration: none; }

main { padding: 3rem 0 4rem; }

/* orbit divider: the site's signature section break */
.orbit-divider {
  border: none;
  height: 1px;
  margin: 3rem 0;
  background-image: linear-gradient(to right, var(--ink-faint) 40%, transparent 0%);
  background-position: bottom;
  background-size: 8px 1px;
  background-repeat: repeat-x;
  opacity: 0.5;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 3rem;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}
.site-footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.8rem; }
.site-footer a { color: var(--ink-dim); }

/* ---------- hero (home) ---------- */
.hero { padding-top: 0.5rem; }
.hero .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-amber);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.6rem;
}
.hero h1 { font-size: 2.3rem; margin: 0 0 0.4rem; }
.hero .role { color: var(--ink-dim); font-family: var(--font-mono); font-size: 0.95rem; margin-bottom: 1.6rem; }
.hero .role .dot { color: var(--accent-cyan); }
.hero p { color: var(--ink-dim); }
.hero .cta-row { display: flex; gap: 0.9rem; margin-top: 1.6rem; flex-wrap: wrap; }
.btn {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border: 1px solid var(--accent-cyan);
  color: var(--accent-cyan);
  padding: 0.55rem 1rem;
  border-radius: var(--radius);
  display: inline-block;
}
.btn:hover { background: var(--accent-cyan); color: var(--bg); text-decoration: none; }
.btn.alt { border-color: var(--accent-amber); color: var(--accent-amber); }
.btn.alt:hover { background: var(--accent-amber); color: var(--bg); }

/* ---------- cards (posts / portfolio) ---------- */
.card-list { display: flex; flex-direction: column; gap: 1.4rem; }
.card {
  display: flex;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
  overflow: hidden;
  transition: border-color 0.15s ease;
}
.card:hover { border-color: var(--accent-cyan); }
.band {
  flex: 0 0 6px;
  display: flex;
  flex-direction: column;
}
.band span { flex: 1; }
.card-body { padding: 1.1rem 1.3rem; flex: 1; }
.card-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.3rem;
}
.card h2, .card h3 { font-size: 1.15rem; margin: 0 0 0.4rem; }
.card h2 a, .card h3 a { color: var(--ink); }
.card h2 a:hover, .card h3 a:hover { color: var(--accent-amber); text-decoration: none; }
.card p.excerpt { color: var(--ink-dim); font-size: 0.95rem; margin: 0; }
.tag-row { margin-top: 0.6rem; display: flex; gap: 0.4rem; flex-wrap: wrap; }
.tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent-cyan);
  border: 1px solid var(--line);
  padding: 0.1rem 0.4rem;
  border-radius: 2px;
}

/* ---------- single post/page ---------- */
.post-header { margin-bottom: 2rem; }
.post-header .card-meta { margin-bottom: 0.6rem; }
.post-header h1 { font-size: 2rem; margin: 0 0 0.6rem; }
.post-content h2 { margin-top: 2.2rem; font-size: 1.4rem; }
.post-content h3 { margin-top: 1.8rem; font-size: 1.15rem; }
.post-content ul, .post-content ol { padding-left: 1.3rem; }
figure { margin: 1.8rem 0; text-align: center; }
figcaption {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-faint);
  margin-top: 0.5rem;
}

/* ---------- portfolio ---------- */
.portfolio-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; }
@media (max-width: 640px) { .portfolio-grid { grid-template-columns: 1fr; } }
.portfolio-card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-card); padding: 0; overflow: hidden; }
.portfolio-cover {
  height: 130px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--bg);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.portfolio-card .card-body { padding: 1.1rem 1.3rem 1.3rem; }
.status-pill {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 2px;
  padding: 0.1rem 0.45rem;
  margin-bottom: 0.5rem;
}
.status-pill.todo { color: var(--accent-rose); border: 1px solid var(--accent-rose); }
.status-pill.live { color: var(--accent-cyan); border: 1px solid var(--accent-cyan); }

.placeholder-note {
  border: 1px dashed var(--accent-rose);
  color: var(--ink-dim);
  background: rgba(217, 122, 143, 0.06);
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
  font-size: 0.88rem;
  margin: 1.4rem 0;
}
.placeholder-note strong { color: var(--accent-rose); }

/* ---------- about ---------- */
.about-photo { float: right; width: 190px; margin: 0 0 1rem 1.6rem; border: 1px solid var(--line); }
@media (max-width: 560px) { .about-photo { float: none; width: 140px; margin: 0 auto 1.4rem; display: block; } }

.doc-list { margin-top: 2rem; }
.doc-list h3 { font-size: 1rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-dim); font-family: var(--font-mono); font-weight: 500; }
.doc-list ul { list-style: none; padding: 0; margin: 0.8rem 0 0; display: flex; flex-direction: column; gap: 0.5rem; }
.doc-list li a {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--accent-cyan);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.45rem 0.8rem;
}
.doc-list li a:hover { border-color: var(--accent-cyan); text-decoration: none; background: rgba(79, 209, 197, 0.08); }

.coord-strip {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
  letter-spacing: 0.03em;
}