/* Pages under posts/ : long-form layout + interactive widgets */

.post {
  max-width: 760px; margin: 0 auto;
  padding: calc(var(--nav-h) + 3rem) 1.25rem 2rem;
}
.post-back { font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-dim); text-decoration: none; }
.post-back:hover { color: var(--accent); }

.post-head { margin: 1.5rem 0 2rem; }
.post-head .chips { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }
.post-head h1 {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(1.8rem, 4vw, 2.4rem); line-height: 1.12; letter-spacing: -0.02em;
}
.post-dek { font-size: 1.2rem; color: var(--text-mid); margin-top: 1rem; line-height: 1.5; }
.post-byline { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-dim); margin-top: 1.25rem; }

.tldr {
  border: 1px solid var(--rule); border-left: 3px solid var(--ink);
  background: var(--paper-2); border-radius: 2px; padding: 1.1rem 1.3rem; margin: 2rem 0;
}
.tldr strong { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-dim); display: block; margin-bottom: 0.4rem; }
.tldr ul { padding-left: 1.1rem; color: var(--text-mid); }
.tldr li + li { margin-top: 0.3rem; }

.prose { font-size: 1.06rem; color: var(--text); }
.prose h2 { font-family: var(--font-display); font-weight: 600; font-size: 1.55rem; line-height: 1.2; color: var(--text); margin: 2.75rem 0 0.9rem; letter-spacing: -0.01em; }
.prose h3 { font-size: 1.12rem; color: var(--text); margin: 1.75rem 0 0.5rem; }
.prose p { margin: 0 0 1.1rem; }
.prose ul, .prose ol { margin: 0 0 1.1rem 1.3rem; }
.prose li { margin-bottom: 0.4rem; }
.prose strong { color: var(--text); }
.prose a { text-underline-offset: 3px; }
.prose code {
  font-family: var(--font-mono); font-size: 0.86em; color: var(--ok);
  background: var(--bg2); border: 1px solid var(--border); border-radius: 4px; padding: 0.05rem 0.35rem;
}
.prose pre {
  font-family: var(--font-mono); font-size: 0.82rem; line-height: 1.6; color: var(--text-mid);
  background: var(--bg3); border: 1px solid var(--border); border-radius: 6px;
  padding: 1rem 1.1rem; margin: 0 0 1.25rem; overflow-x: auto;
}
.prose pre code { background: none; border: 0; padding: 0; color: inherit; }
.prose blockquote { border-left: 3px solid var(--accent2); padding: 0.2rem 0 0.2rem 1rem; color: var(--text-mid); margin: 0 0 1.2rem; }
.prose table { width: 100%; border-collapse: collapse; font-size: 0.92rem; margin: 0 0 1.25rem; }
.prose th, .prose td { text-align: left; padding: 0.55rem 0.7rem; border-bottom: 1px solid var(--border); }
.prose th { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-dim); font-weight: 400; }
.formula {
  font-family: var(--font-mono); font-size: 0.95rem; color: var(--text);
  background: var(--bg2); border: 1px dashed var(--border-bright); border-radius: 6px;
  padding: 0.9rem 1.1rem; margin: 0 0 1.2rem; overflow-x: auto; white-space: nowrap;
}

/* ─── WIDGET ─── */
/* Widgets are numbered figures: Ink frame, caption bar "Fig. n · title" (CSS counter, no per-page numbering). */
.post { counter-reset: fig; }
.widget {
  counter-increment: fig;
  margin: 2rem -1.25rem 2.25rem; padding: 0 1.4rem 1.4rem;
  background: var(--paper); border: 1px solid var(--ink); border-radius: 2px;
}
@media (min-width: 900px) { .widget { margin-left: -70px; margin-right: -70px; } }
.widget-head {
  display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; flex-wrap: wrap;
  margin: 0 -1.4rem 1.1rem; padding: 0.5rem 0.9rem; border-bottom: 1px solid var(--ink);
}
.widget-title { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text); }
.widget-head .widget-title::before { content: 'Fig. ' counter(fig) ' · '; }
.widget-hint { font-size: 0.82rem; color: var(--text-dim); }
.widget svg { display: block; width: 100%; height: auto; }
/* wide figures keep a legible minimum size and scroll sideways on phones */
.fig-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.fig-scroll > svg { min-width: 680px; }
.widget svg text { font-family: var(--font-mono); }

.controls { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem 1.5rem; margin: 1rem 0; }
.control label { display: flex; justify-content: space-between; gap: 0.5rem; font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-mid); margin-bottom: 0.35rem; }
.control output { color: var(--text); font-weight: 700; }
.control select {
  width: 100%; background: var(--bg); color: var(--text); border: 1px solid var(--border-bright);
  border-radius: 5px; padding: 0.45rem 0.5rem; font-family: var(--font-mono); font-size: 0.8rem;
}
input[type="range"] { width: 100%; accent-color: var(--accent); height: 1.4rem; background: transparent; }

.btn-row { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.75rem; }
.wbtn {
  font-family: var(--font-mono); font-size: 0.78rem; cursor: pointer;
  background: var(--bg); color: var(--text); border: 1px solid var(--border-bright);
  border-radius: 5px; padding: 0.45rem 0.85rem; transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.wbtn:hover { border-color: var(--accent); color: var(--accent); }
.wbtn.primary { background: var(--ink); color: var(--on-ink); border-color: var(--ink); font-weight: 600; }
.wbtn.primary:hover { background: var(--ink-2); color: var(--on-ink); }
.wbtn.danger { border-color: color-mix(in srgb, var(--bad) 50%, transparent); color: var(--bad); }
.wbtn.danger:hover { background: color-mix(in srgb, var(--bad) 8%, transparent); }
.wbtn[aria-pressed="true"] { background: color-mix(in srgb, var(--accent) 10%, transparent); border-color: var(--accent); color: var(--accent); }
.wbtn:disabled { opacity: 0.45; cursor: not-allowed; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 0.75rem; margin-top: 1rem; }
.stat { background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 0.75rem 0.9rem; }
.stat-label { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-dim); }
.stat-value { font-family: var(--font-mono); font-size: 1.3rem; font-weight: 700; color: var(--text); margin-top: 0.15rem; }
.stat-value.good { color: var(--ok); } .stat-value.warn { color: var(--warn); } .stat-value.bad { color: var(--bad); }
.stat-sub { font-size: 0.75rem; color: var(--text-dim); }

.log {
  font-family: var(--font-mono); font-size: 0.75rem; line-height: 1.55;
  background: var(--bg3); border: 1px solid var(--border); border-radius: 6px;
  padding: 0.75rem 0.9rem; height: 170px; overflow-y: auto; color: var(--text-mid); margin-top: 1rem;
}
.log .t { color: var(--text-dim); }
.log .e { color: var(--bad); } .log .w { color: var(--warn); } .log .o { color: var(--ok); } .log .i { color: var(--accent); }

.callout { font-size: 0.92rem; padding: 0.8rem 1rem; border-radius: 6px; margin-top: 1rem; border: 1px solid var(--border); background: var(--bg); color: var(--text-mid); }
.callout b { color: var(--text); }

/* footnote block */
.assumptions {
  margin: 2.5rem 0; padding: 1rem 0 0;
  border-top: 1.5px solid var(--ink); font-size: 0.88rem; color: var(--text-mid);
}
.assumptions h2 { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-dim); margin-bottom: 0.6rem; }
.assumptions ul { padding-left: 1.1rem; }
.assumptions li + li { margin-top: 0.3rem; }

.post-end { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--border); }
.post-end h2 { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-dim); margin-bottom: 1rem; }
.post-end-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.post-end-grid a.card { padding: 1rem 1.2rem; }
.post-end-grid .k { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.08em; }
.post-end-grid .v { font-weight: 600; margin-top: 0.25rem; }
@media (max-width: 620px) { .post-end-grid { grid-template-columns: 1fr; } }

/* tooltips/legend for charts */
.legend { display: flex; flex-wrap: wrap; gap: 1rem; font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-mid); margin-top: 0.6rem; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 0.35rem; vertical-align: -1px; }