/* ============================================================
   Argus Blog
   Visual language adapted from argus-systems.ai
   ============================================================ */

:root {
  --argus-paper:       #FFFFFF;
  --argus-paper-2:     #FAFAF8;
  --argus-paper-3:     #F2F2EE;
  --argus-ink:         #0A1428;
  --argus-ink-2:       #1A2540;
  --argus-ink-mute:    #5A627A;
  --argus-ink-faint:   #9CA3AF;
  --argus-line:        rgba(10, 20, 40, 0.08);
  --argus-line-strong: rgba(10, 20, 40, 0.16);
  --argus-cyan:        #0891B2;
  --argus-cyan-soft:   #67E8F9;
  --argus-cyan-glow:   rgba(34, 211, 238, 0.10);
  --argus-gold:        #B8860B;
  --argus-gold-soft:   #D4AF37;

  --font-display: "Space Grotesk", -apple-system, system-ui, sans-serif;
  --font-body:    "Inter", -apple-system, system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", "SF Mono", "Menlo", monospace;

  --easing: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--argus-paper);
  color: var(--argus-ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.55;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--argus-ink); text-decoration: none; transition: color .2s var(--easing); }
a:hover { color: var(--argus-cyan); }

.container { max-width: 1080px; margin: 0 auto; padding: 0 40px; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--argus-cyan);
  margin: 0 0 18px;
}
.mono { font-family: var(--font-mono); }
.muted { color: var(--argus-ink-mute); }
.gold { color: var(--argus-gold); }

/* ============================================================
   Sticky glass nav
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 40px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--argus-line);
}
.nav-brand { display: flex; align-items: center; gap: 12px; }
.nav-brand img { width: 30px; height: 30px; object-fit: contain; }
.nav-brand .name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: -0.01em;
  color: var(--argus-ink);
}
.nav-brand .name b { color: var(--argus-cyan); font-weight: 600; }
.nav-links { display: flex; gap: 28px; }
.nav-links a {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--argus-ink-mute);
}
.nav-links a:hover { color: var(--argus-ink); }

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  overflow: hidden;
  padding: 180px 0 80px;
  background: var(--argus-paper);
  border-bottom: 1px solid var(--argus-line);
}
.hero-eye {
  position: absolute;
  inset: 0;
  background-image: url("../assets/hero-art.png");
  background-repeat: no-repeat;
  background-position: center right -60px;
  background-size: contain;
  opacity: 0.30;
  filter: grayscale(0.35);
  z-index: 0;
  pointer-events: none;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 60% at 82% 50%, var(--argus-cyan-glow), transparent 65%),
    radial-gradient(ellipse 30% 40% at 76% 50%, rgba(184, 134, 11, 0.06), transparent 60%);
  z-index: 0;
  pointer-events: none;
}
.hero .container { position: relative; z-index: 2; }
.hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.8rem, 5.4vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin: 0 0 20px;
  max-width: 16ch;
}
.hero h1 .accent { color: var(--argus-cyan); }
.hero .lede {
  font-size: 1.18rem;
  line-height: 1.55;
  color: var(--argus-ink-mute);
  max-width: 52ch;
  margin: 0 0 28px;
}

/* ============================================================
   Section heading
   ============================================================ */
.section { padding: 72px 0; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 8px; }
.section-head h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.4rem, 2.2vw, 1.9rem);
  letter-spacing: -0.015em;
  margin: 0;
}

/* ============================================================
   Advisory list
   ============================================================ */
.post-list { list-style: none; margin: 36px 0 0; padding: 0; display: grid; gap: 18px; }

.post-row {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 28px;
  padding: 28px 30px;
  background: var(--argus-paper);
  border: 1px solid var(--argus-line);
  border-radius: 18px;
  transition: border-color .25s var(--easing), transform .25s var(--easing), box-shadow .25s var(--easing);
}
.post-row:hover {
  border-color: var(--argus-cyan);
  transform: translateY(-3px);
  box-shadow: 0 18px 40px -28px rgba(8, 145, 178, 0.45);
}

.post-meta { display: flex; flex-direction: column; gap: 12px; align-items: flex-start; }
.post-meta time {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--argus-ink-mute);
}

.post-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.32rem;
  line-height: 1.25;
  letter-spacing: -0.015em;
  margin: 0 0 8px;
}
.post-title a { color: var(--argus-ink); }
.post-title a:hover { color: var(--argus-cyan); }
.post-summary { margin: 0 0 16px; color: var(--argus-ink-mute); font-size: 0.98rem; }

/* ============================================================
   Category pill & chips
   ============================================================ */
.state {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--argus-ink-mute);
  border: 1px solid var(--argus-line-strong);
  border-radius: 6px;
  padding: 2px 9px;
}

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.01em;
  color: var(--argus-ink-mute);
  background: var(--argus-paper-3);
  border: 1px solid var(--argus-line);
  border-radius: 6px;
  padding: 2px 9px;
}
.chip-author { color: var(--argus-cyan); border-color: rgba(8, 145, 178, 0.35); background: rgba(8, 145, 178, 0.05); }
a.chip:hover { color: var(--argus-ink); border-color: var(--argus-line-strong); }

.empty { color: var(--argus-ink-mute); margin: 48px 0; font-family: var(--font-mono); }

/* ============================================================
   Single post
   ============================================================ */
.post { padding: 150px 0 60px; }
.back { margin: 0 0 28px; }
.back a { font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.06em; color: var(--argus-ink-mute); }
.back a:hover { color: var(--argus-cyan); }

.post-header { margin-bottom: 36px; }
.post-header .row { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.post-header h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 3.6vw, 3rem);
  line-height: 1.06;
  letter-spacing: -0.025em;
  margin: 0 0 16px;
  max-width: 22ch;
}
.post-header .lede { font-size: 1.18rem; color: var(--argus-ink-mute); margin: 0; max-width: 60ch; }

.facts {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 8px 20px;
  margin: 0 0 40px;
  padding: 26px 28px;
  background: var(--argus-paper-2);
  border: 1px solid var(--argus-line);
  border-radius: 18px;
}
.facts dt { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--argus-ink-faint); align-self: center; }
.facts dd { margin: 0; font-family: var(--font-mono); font-size: 0.92rem; color: var(--argus-ink); }

.post-content { font-size: 1.05rem; line-height: 1.7; max-width: 70ch; }
.post-content h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.5rem;
  letter-spacing: -0.015em;
  margin: 2em 0 0.6em;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--argus-line);
}
.post-content h3 { font-family: var(--font-display); font-weight: 600; }
.post-content a { color: var(--argus-cyan); text-decoration: underline; text-underline-offset: 3px; }
.post-content pre {
  background: var(--argus-paper-2);
  border: 1px solid var(--argus-line);
  border-radius: 14px;
  padding: 18px 20px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.6;
}
.post-content code { font-family: var(--font-mono); font-size: 0.88em; }
.post-content :not(pre) > code {
  background: var(--argus-paper-3);
  border: 1px solid var(--argus-line);
  border-radius: 5px;
  padding: 1px 6px;
}
.post-content ul { padding-left: 1.2em; }
.post-content table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
.post-content th, .post-content td { border: 1px solid var(--argus-line); padding: 8px 12px; text-align: left; }
.post-content th { background: var(--argus-paper-2); font-family: var(--font-display); }

.post-footer { margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--argus-line); }

/* ============================================================
   Pagination
   ============================================================ */
.pagination { display: flex; gap: 24px; align-items: center; margin: 48px 0 0; font-family: var(--font-mono); font-size: 0.82rem; color: var(--argus-ink-mute); }

/* ============================================================
   Footer
   ============================================================ */
.site-footer { border-top: 1px solid var(--argus-line); background: var(--argus-paper-2); margin-top: 40px; }
.site-footer .container { display: flex; align-items: center; justify-content: space-between; padding-top: 32px; padding-bottom: 32px; gap: 20px; flex-wrap: wrap; }
.site-footer p { margin: 0; color: var(--argus-ink-faint); font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.04em; }
.site-footer .mark { display: flex; align-items: center; gap: 10px; color: var(--argus-ink-mute); font-family: var(--font-display); font-size: 14px; }
.site-footer .mark img { width: 22px; height: 22px; object-fit: contain; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 720px) {
  .container { padding: 0 22px; }
  .nav { padding: 14px 22px; }
  .nav-links { gap: 16px; }
  .post-row { grid-template-columns: 1fr; gap: 16px; }
  .post-meta { flex-direction: row; align-items: center; }
  .facts { grid-template-columns: 1fr; gap: 4px 0; }
  .facts dt { margin-top: 10px; }
  .hero { padding: 150px 0 64px; }
  .hero-eye { opacity: 0.16; background-position: center; }
}