/* ============================================
   Stack Your Side — Design Tokens
   Palette: paper white + slate ink + amber signal
   Type: Space Grotesk (display) + IBM Plex Sans (body)
   Signature: node-link / circuit dot motif
   ============================================ */

:root {
  --paper: #F5F3EE;
  --card: #FFFFFF;
  --slate: #1E2432;
  --slate-mid: #333B4D;
  --amber: #E8A33D;
  --amber-dark: #C77F1F;
  --ink: #1E2432;
  --ink-soft: #565F70;
  --line: #E1DED4;
  --white: #FFFFFF;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.65;
  font-size: 17px;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap { max-width: 780px; margin: 0 auto; padding: 0 24px; }
.wrap-wide { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ---------- Node motif (signature element) ---------- */
.node-divider {
  height: 3px;
  width: 100%;
  background: repeating-linear-gradient(90deg, var(--amber) 0 8px, transparent 8px 20px);
  opacity: 0.7;
}

.node-bg {
  background-image: radial-gradient(circle, rgba(30,36,50,0.06) 1.5px, transparent 1.5px);
  background-size: 26px 26px;
}

/* ---------- Header ---------- */
header.site-header {
  background: var(--slate);
  color: var(--paper);
  padding: 20px 0;
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 3px solid var(--amber);
}

.nav-row { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }

.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  letter-spacing: -0.01em;
  color: var(--white);
}
.brand span { color: var(--amber); }

nav.main-nav ul { list-style: none; display: flex; gap: 26px; flex-wrap: wrap; }

nav.main-nav a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--paper);
  opacity: 0.85;
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
  transition: all 0.15s ease;
}
nav.main-nav a:hover { opacity: 1; color: var(--amber); border-bottom-color: var(--amber); }

/* ---------- Hero ---------- */
.hero {
  background: var(--slate);
  color: var(--paper);
  padding: 60px 0 72px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(232,163,61,0.12) 1.5px, transparent 1.5px);
  background-size: 30px 30px;
  pointer-events: none;
}
.hero-inner { position: relative; max-width: 640px; }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.76rem;
  color: var(--amber);
  font-weight: 700;
  margin-bottom: 16px;
}

h1.hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4.2vw, 3rem);
  line-height: 1.12;
  margin-bottom: 18px;
  letter-spacing: -0.01em;
}

.hero-sub { font-size: 1.06rem; color: rgba(245,243,238,0.82); max-width: 540px; margin-bottom: 30px; }

.btn { display: inline-block; padding: 13px 26px; border-radius: 2px; font-weight: 600; font-size: 0.93rem; transition: all 0.15s ease; }
.btn-amber { background: var(--amber); color: var(--slate); }
.btn-amber:hover { background: var(--amber-dark); transform: translateY(-1px); }
.btn-outline { border: 1.5px solid var(--paper); color: var(--paper); margin-left: 10px; }
.btn-outline:hover { border-color: var(--amber); color: var(--amber); }

/* ---------- Sections ---------- */
section { padding: 60px 0; }

h2.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  margin-bottom: 10px;
  color: var(--slate);
  letter-spacing: -0.01em;
}

.section-lead { color: var(--ink-soft); max-width: 620px; margin-bottom: 36px; font-size: 1.01rem; }

/* ---------- Cards ---------- */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 24px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 26px 22px;
  transition: all 0.15s ease;
  border-top: 3px solid var(--amber);
}
.card:hover { transform: translateY(-3px); box-shadow: 0 10px 24px rgba(30,36,50,0.08); }

.card .num { font-family: var(--font-display); color: var(--amber-dark); font-size: 1.5rem; font-weight: 700; margin-bottom: 8px; display: block; }
.card h3 { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; color: var(--slate); margin-bottom: 8px; }
.card p { color: var(--ink-soft); font-size: 0.94rem; }

/* ---------- Post list ---------- */
.post-item { display: block; padding: 24px 0; border-bottom: 1px solid var(--line); }
.post-item:last-child { border-bottom: none; }

.post-cat { text-transform: uppercase; font-size: 0.7rem; letter-spacing: 0.1em; color: var(--amber-dark); font-weight: 700; margin-bottom: 8px; display: block; }
.post-item h3 { font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; color: var(--slate); margin-bottom: 8px; transition: color 0.15s ease; }
.post-item:hover h3 { color: var(--amber-dark); }
.post-item p { color: var(--ink-soft); font-size: 0.95rem; }

/* ---------- Article ---------- */
article.post-body {
  background: var(--card);
  padding: 46px;
  border-radius: 4px;
  border: 1px solid var(--line);
  margin: -36px 0 56px;
  position: relative;
  z-index: 2;
}
article.post-body h2 { font-family: var(--font-display); color: var(--slate); font-size: 1.4rem; margin: 34px 0 14px; letter-spacing: -0.01em; }
article.post-body h2:first-child { margin-top: 0; }
article.post-body h3 { font-family: var(--font-display); color: var(--slate); font-size: 1.1rem; margin: 22px 0 10px; }
article.post-body p { margin-bottom: 16px; color: var(--ink); }
article.post-body ul, article.post-body ol { margin: 0 0 18px 22px; }
article.post-body li { margin-bottom: 8px; }
article.post-body strong { color: var(--slate); }
article.post-body table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 0.92rem; }
article.post-body th, article.post-body td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; }
article.post-body th { background: var(--paper); font-family: var(--font-display); color: var(--slate); }

.post-meta { color: rgba(245,243,238,0.7); font-size: 0.88rem; margin-top: 12px; }
.post-hero-title { max-width: 700px; }

.article-footer-note { background: var(--paper); border-left: 3px solid var(--amber); padding: 16px 20px; font-size: 0.94rem; color: var(--ink-soft); margin-top: 28px; }

/* ---------- Footer ---------- */
footer.site-footer { background: var(--slate); color: rgba(245,243,238,0.72); padding: 40px 0 28px; font-size: 0.88rem; border-top: 3px solid var(--amber); }
.footer-row { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 18px; align-items: center; }
footer.site-footer a:hover { color: var(--amber); }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }

/* ---------- Misc pages ---------- */
.page-hero { background: var(--slate); color: var(--paper); padding: 52px 0; }
.simple-page { padding: 46px 0 66px; }
.simple-page h2 { font-family: var(--font-display); color: var(--slate); font-size: 1.3rem; margin: 28px 0 12px; }
.simple-page h2:first-child { margin-top: 0; }
.simple-page p { margin-bottom: 14px; color: var(--ink-soft); }

form.contact-form { display: flex; flex-direction: column; gap: 16px; max-width: 480px; }
form.contact-form input, form.contact-form textarea { padding: 12px 14px; border: 1px solid var(--line); border-radius: 3px; font-family: var(--font-body); font-size: 0.95rem; background: var(--white); }
form.contact-form label { font-size: 0.84rem; font-weight: 600; color: var(--slate); margin-bottom: 4px; display: block; }

@media (max-width: 640px) {
  nav.main-nav ul { gap: 14px; }
  article.post-body { padding: 26px 18px; margin-top: -20px; }
  .footer-row { flex-direction: column; align-items: flex-start; }
}