/* ═══════════════════════════════════════════════════════════════════════════
   Direction C — Signal / Packet — shared component CSS
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Hero ────────────────────────────────────────────────────────────────── */
.c-hero {
  padding: 64px 32px 56px;
  border-bottom: 1px solid var(--rule);
  background-image:
    radial-gradient(circle at 18% 30%, var(--panel-2) 0%, transparent 50%),
    linear-gradient(var(--faint) 1px, transparent 1px),
    linear-gradient(90deg, var(--faint) 1px, transparent 1px);
  background-size: auto, 48px 48px, 48px 48px;
}
.c-hero-grid {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px;
  align-items: center; max-width: 1200px; margin: 0 auto;
}
.c-eyebrow {
  font-family: var(--font-mono); font-size: 11px; color: var(--accent);
  letter-spacing: 2px; margin-bottom: 22px;
  display: flex; align-items: center; gap: 10px;
}
.c-dot {
  width: 6px; height: 6px; background: var(--accent); border-radius: 50%;
  box-shadow: 0 0 12px var(--accent);
}
.c-hero-title {
  font-size: 52px; line-height: 1.06; font-weight: 700;
  color: var(--ink); margin: 0; letter-spacing: -1.2px;
}
.c-hl {
  background: linear-gradient(180deg, transparent 65%, var(--accent-dim) 65%);
  padding: 0 6px;
}
.c-hero-title em { color: var(--accent); font-style: normal; }
.c-hero-lede {
  color: var(--body); font-size: 16px; line-height: 1.7;
  max-width: 500px; margin: 26px 0 0;
}
.c-hero-cta { display: flex; gap: 14px; margin-top: 30px; }
.c-btn-primary, .c-btn-ghost {
  font-size: 13px; font-weight: 600; padding: 11px 20px;
  text-decoration: none; transition: opacity 0.15s, border-color 0.15s, color 0.15s;
  display: inline-block;
}
.c-btn-primary { background: var(--accent); color: #06080d; }
.c-btn-primary:hover { opacity: 0.85; }
.c-btn-ghost { border: 1px solid var(--rule); color: var(--ink); }
.c-btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* Hero packet visualization */
.c-hero-viz {
  background: var(--panel); border: 1px solid var(--rule);
  padding: 22px;
}
.c-viz-head {
  display: flex; justify-content: space-between;
  font-family: var(--font-mono); font-size: 10.5px; color: var(--dim);
  margin-bottom: 16px;
}
#packet-pipeline { width: 100%; height: 80px; display: block; }
.c-viz-stages {
  display: flex; justify-content: space-between; padding: 0 4%; margin-top: 8px;
}
.c-viz-stages > div { text-align: center; }
.c-stage-num {
  width: 32px; height: 32px; margin: 0 auto;
  border: 1.5px solid var(--accent); color: var(--accent);
  font-family: var(--font-mono); font-size: 9.5px; font-weight: 600;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg);
}
.c-stage-lbl {
  font-family: var(--font-mono); font-size: 9.5px; color: var(--body);
  margin-top: 6px; letter-spacing: 1px;
}
.c-viz-metrics {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
  margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--rule);
}
.c-metric-k { font-family: var(--font-mono); font-size: 9.5px; color: var(--dim); letter-spacing: 1px; }
.c-metric-v { color: var(--ink); font-size: 18px; font-weight: 600; margin-top: 4px; }

/* ── Sections ────────────────────────────────────────────────────────────── */
.c-section {
  padding: 48px 32px; max-width: 1200px; margin: 0 auto;
  border-bottom: 1px solid var(--rule);
}
.c-section-head {
  display: flex; align-items: flex-end; margin-bottom: 28px;
}
.c-kicker {
  font-family: var(--font-mono); font-size: 11px; color: var(--accent);
  letter-spacing: 2px; margin-bottom: 8px;
}
.c-section-title {
  font-size: 28px; font-weight: 700; color: var(--ink);
  margin: 0; letter-spacing: -0.6px;
}
.c-section-action {
  margin-left: auto; font-size: 13px; color: var(--accent);
  text-decoration: none; font-weight: 500;
}
.c-section-action:hover { text-decoration: underline; }

/* ── Cards ───────────────────────────────────────────────────────────────── */
.c-card-grid { display: grid; gap: 14px; }
.c-cols-2 { grid-template-columns: repeat(2, 1fr); }
.c-cols-3 { grid-template-columns: repeat(3, 1fr); }
.c-cols-4 { grid-template-columns: repeat(4, 1fr); }
.c-cols-5 { grid-template-columns: repeat(5, 1fr); }
.c-card {
  background: var(--panel); border: 1px solid var(--rule);
  padding: 22px 20px; text-decoration: none; color: inherit;
  transition: border-color 0.15s;
  display: block;
}
.c-card:hover { border-color: var(--accent); }
.c-card-meta {
  font-family: var(--font-mono); font-size: 10.5px; color: var(--dim);
  letter-spacing: 1.5px; display: flex; justify-content: space-between;
}
.c-card-title {
  color: var(--ink); font-size: 20px; font-weight: 600;
  margin: 18px 0 10px; letter-spacing: -0.3px;
}
.c-card-slash { color: var(--accent); }
.c-card-desc { color: var(--body); font-size: 13.5px; line-height: 1.6; margin: 0; }
.c-tag-row { margin-top: 18px; display: flex; gap: 6px; flex-wrap: wrap; }
.c-tag {
  font-family: var(--font-mono); font-size: 10.5px; color: var(--body);
  background: var(--panel-2); padding: 3px 8px;
}

/* Topic / learning cards */
.c-topic-card {
  background: var(--panel); border: 1px solid var(--rule);
  padding: 16px 14px; text-decoration: none; min-height: 120px;
  display: block; transition: border-color 0.15s;
}
.c-topic-card:hover { border-color: var(--accent); }
.c-topic-meta {
  font-family: var(--font-mono); font-size: 10px; color: var(--dim);
  letter-spacing: 1.5px; margin-bottom: 8px;
}
.c-topic-name { color: var(--ink); font-size: 13px; font-weight: 600; line-height: 1.25; }
.c-topic-note { color: var(--dim); font-size: 11.5px; margin-top: 6px; line-height: 1.5; }

/* Stack cards (about page) */
.c-stack-card {
  background: var(--panel); border: 1px solid var(--rule);
  padding: 18px;
}
.c-stack-card > div { color: var(--ink); font-size: 13px; padding: 3px 0; }
.c-stack-key {
  font-family: var(--font-mono); color: var(--accent); font-size: 11px;
  letter-spacing: 1.5px; margin-bottom: 10px;
}

/* ── Post list (home journal section) ────────────────────────────────────── */
.c-post-list { display: flex; flex-direction: column; }
.c-post-row {
  display: grid; grid-template-columns: 110px 1fr 110px 30px;
  gap: 24px; padding: 16px 0; align-items: center;
  border-top: 1px solid var(--rule); text-decoration: none; color: inherit;
}
.c-post-row:last-child { border-bottom: 1px solid var(--rule); }
.c-post-row:hover .c-post-title { color: var(--accent); }
.c-post-date { font-family: var(--font-mono); font-size: 11.5px; color: var(--dim); }
.c-post-title { color: var(--ink); font-size: 15px; font-weight: 500; transition: color 0.15s; }
.c-post-cat {
  font-family: var(--font-mono); font-size: 10.5px; color: var(--accent);
  letter-spacing: 1px; text-transform: uppercase;
}
.c-post-arrow { color: var(--dim); text-align: right; }

/* ── About page ──────────────────────────────────────────────────────────── */
.c-about-hero {
  padding: 56px 32px; max-width: 1200px; margin: 0 auto;
  border-bottom: 1px solid var(--rule);
}
.c-about-grid {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px;
}
.c-about-title {
  font-size: 44px; line-height: 1.08; font-weight: 700;
  color: var(--ink); margin: 0; letter-spacing: -1.2px;
}
.c-about-title .c-accent { color: var(--accent); }
.c-about-lede {
  color: var(--body); font-size: 16px; line-height: 1.75;
  max-width: 540px; margin: 26px 0 0;
}
.c-whoami {
  background: var(--panel); border: 1px solid var(--rule); padding: 22px;
  height: fit-content;
}
.c-whoami-head {
  font-family: var(--font-mono); font-size: 10.5px; color: var(--dim);
  letter-spacing: 1.5px; margin-bottom: 12px;
}
.c-whoami-table { width: 100%; font-size: 13px; border-collapse: collapse; }
.c-whoami-table td {
  padding: 8px 0; border-bottom: 1px solid var(--rule);
}
.c-whoami-table td:first-child {
  color: var(--dim); font-family: var(--font-mono); font-size: 11px;
}
.c-whoami-table td:last-child { color: var(--ink); text-align: right; }

.c-timeline { border-top: 1px solid var(--rule); }
.c-timeline-row {
  display: grid; grid-template-columns: 180px 1fr 1.5fr;
  gap: 28px; padding: 18px 0; align-items: baseline;
  border-bottom: 1px solid var(--rule);
}
.c-timeline-when { font-family: var(--font-mono); color: var(--accent); font-size: 13px; }
.c-timeline-role { color: var(--ink); font-size: 15px; font-weight: 600; }
.c-timeline-note { color: var(--body); font-size: 14px; }

/* ─── Project cards & visualizers ──────────────────────────────────────── */
.c-proj-card { display: flex; flex-direction: column; }
.c-card-full { grid-column: 1 / -1; }
.c-proj-links {
  margin-top: auto; padding-top: 14px;
  display: flex; gap: 14px; align-items: center;
  border-top: 1px solid var(--rule);
}
.c-proj-link-case { font: 600 11.5px/1 var(--font-mono); color: var(--accent); text-decoration: none; }
.c-proj-link-case:hover { text-decoration: underline; }
.c-proj-link-gh { font: 500 11.5px/1 var(--font-mono); color: var(--body); text-decoration: none; margin-left: auto; }
.c-proj-link-gh:hover { color: var(--ink); }

.c-proj-viz {
  background: rgba(34,211,238,.03); border: 1px solid var(--rule);
  border-radius: 4px; padding: 12px 14px; margin-bottom: 14px; overflow: hidden;
}
.c-viz-pipeline { display: flex; align-items: center; flex-wrap: wrap; gap: 5px; }
.c-viz-node {
  font: 500 10px/1 var(--font-mono);
  background: var(--panel); border: 1px solid var(--rule);
  border-radius: 3px; padding: 5px 9px; color: var(--body); white-space: nowrap;
}
.c-viz-node--hi { border-color: rgba(34,211,238,.4); color: var(--accent); }
.c-viz-arrow { font-size: 11px; color: var(--accent); line-height: 1; }
.c-viz-label { font: 400 10px/1 var(--font-mono); color: var(--dim); margin-top: 8px; }
.c-viz-loop-note { font: 400 10px/1 var(--font-mono); color: var(--accent); opacity: .7; margin-top: 6px; text-align: center; }
.c-viz-kanban { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
.c-viz-col-head { font: 600 9px/1 var(--font-mono); letter-spacing: .07em; color: var(--dim); margin-bottom: 5px; }
.c-viz-chip {
  font: 400 9.5px/1.3 var(--font-mono);
  background: var(--panel); border: 1px solid var(--rule);
  border-radius: 2px; padding: 4px 6px; margin-bottom: 4px; color: var(--ink); display: block;
}
.c-viz-chip--active { border-color: rgba(34,211,238,.4); color: var(--accent); }
.c-viz-chip--done { opacity: .4; text-decoration: line-through; }

.c-proj-header-links { display: flex; gap: 12px; margin-top: 20px; flex-wrap: wrap; }
.c-feat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin: 24px 0; }
.c-feat-card {
  background: var(--panel); border: 1px solid var(--rule);
  border-left: 3px solid var(--accent); border-radius: 4px; padding: 16px;
}
.c-feat-title { font: 600 13px/1.2 var(--font-sans); color: var(--ink); margin: 0 0 6px; }
.c-feat-desc { font: 400 12.5px/1.6 var(--font-sans); color: var(--body); margin: 0; }
.c-stack-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; margin: 16px 0; }
.c-stack-key { font: 600 10px/1 var(--font-mono); color: var(--dim); margin-bottom: 4px; }
.c-stack-val { font: 500 13px/1 var(--font-sans); color: var(--ink); }

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 960px) {
  .c-hero-grid { grid-template-columns: 1fr; }
  .c-hero-title { font-size: 40px; }
  .c-cols-2 { grid-template-columns: 1fr; }
  .c-cols-3 { grid-template-columns: 1fr; }
  .c-cols-4 { grid-template-columns: repeat(2, 1fr); }
  .c-cols-5 { grid-template-columns: repeat(2, 1fr); }
  .c-card-full { grid-column: 1; }
  .c-feat-grid { grid-template-columns: 1fr; }
  .c-viz-kanban { grid-template-columns: 1fr; }
  .c-about-grid { grid-template-columns: 1fr; }
  .c-about-title { font-size: 34px; }
  .c-timeline-row { grid-template-columns: 1fr; gap: 4px; }
  .c-post-row { grid-template-columns: 1fr; gap: 4px; }
  .c-post-arrow { display: none; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}