/* SennaMind brand system — single source of truth for every page.
   Extracted from variants/variant-terminal-brand.html. Obey BRANDING.md.
   Fonts load per-page via <link> (Sora + IBM Plex Mono). */
:root {
  --bg:        #0E1C3C;   /* sampled banner navy — royal, not near-black */
  --bg-raise:  #122247;   /* slightly lifted navy panel */
  --line:      #25365c;   /* navy hairline */
  --line-soft: #1b2b4d;
  --ink:       #F4F7FC;   /* near-white, AA on navy */
  --ink-dim:   #9FB0CE;   /* blue-gray secondary, AA on navy */
  --ink-faint: #6f82a6;   /* used only for non-body labels/punctuation */
  --yellow:    #FFD400;   /* sampled brand yellow — the single accent */
  --yellow-hi: #FFE04D;
  --yellow-ink:#0E1C3C;   /* dark navy text on yellow button */
  --string:    #6FD3C0;   /* soft teal-green for code strings (racing-line green) */
  /* the brand racing-line, used ONLY as one hairline */
  --racing:    linear-gradient(90deg, #2f8fff 0%, #2fd07a 48%, #FFD400 100%);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Sora", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
.mono { font-family: "IBM Plex Mono", ui-monospace, monospace; }
a { color: var(--yellow); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 28px; }

/* ---- top bar ---- */
nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 24px 0;
  border-bottom: 1px solid var(--line-soft);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand:hover { text-decoration: none; }
.brand img.logo { width: 46px; height: 46px; display: block; flex: none; }
.wordmark {
  font-weight: 700; font-size: 1.22rem; letter-spacing: 0.04em;
  line-height: 1; display: inline-flex; align-items: baseline;
}
.wordmark .senna { color: var(--yellow); }
.wordmark .mind  { color: var(--ink); }
nav .links { display: flex; gap: 26px; }
nav .links a {
  color: var(--ink-dim); font-size: .82rem; font-weight: 500;
  font-family: "IBM Plex Mono", monospace; letter-spacing: .02em;
}
nav .links a:hover { color: var(--ink); text-decoration: none; }
@media (max-width: 620px) { nav .links { display: none; } }

/* ---- hero: asymmetric, text left / code right ---- */
.hero {
  position: relative;
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px;
  align-items: center;
  padding: 72px 0 64px;
}
/* faint racing line through a corner, traced behind the hero.
   <6% contrast, no glow — a subtle speed cue, not decoration. */
.track-bg {
  position: absolute; inset: -40px 0; z-index: 0;
  pointer-events: none; overflow: hidden;
}
.track-bg svg { width: 100%; height: 100%; display: block; }
.track-bg path {
  fill: none; stroke: var(--ink-dim); stroke-width: 2;
  opacity: .05; vector-effect: non-scaling-stroke;
}
.hero > .hero-text, .hero > .code-card { position: relative; z-index: 1; }
.status {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: "IBM Plex Mono", monospace; font-size: .78rem;
  color: var(--ink); letter-spacing: .01em;
  border: 1px solid var(--line); border-radius: 999px;
  padding: 5px 14px 5px 11px;
  margin-bottom: 24px;
}
.status .tick {
  width: 7px; height: 7px; border-radius: 50%; background: var(--yellow);
  flex: none;
}
.status b { color: var(--yellow); font-weight: 600; }
h1 {
  font-size: clamp(2.1rem, 4.8vw, 3.35rem);
  font-weight: 700; line-height: 1.08; letter-spacing: -0.025em;
  color: var(--ink); max-width: 16ch;
}
h1 .hl { color: var(--yellow); }
/* the racing-line hairline — a recurring brand motif (hero + each section head) */
.rule {
  width: 84px; height: 3px; margin-top: 22px; border-radius: 2px;
  background: var(--racing);
}
.rule.sec { margin-top: 14px; margin-bottom: 4px; }
/* the brand motto, set like the banner: spaced, uppercase, mono */
.tagline {
  margin-top: 16px; font-family: "IBM Plex Mono", monospace;
  font-size: .82rem; letter-spacing: .34em; text-transform: uppercase;
  color: var(--ink-dim);
}
.tagline b { color: var(--yellow); font-weight: 500; }
/* large race-car-S sign-off in the closing section */
.close-mark { width: 92px; height: 92px; display: block; margin: 0 auto 22px; opacity: .92; }
.hero p.sub {
  margin-top: 20px; font-size: 1.12rem; color: var(--ink-dim);
  max-width: 46ch; line-height: 1.62;
}
.cta-row { margin-top: 32px; display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 9px;
  background: var(--yellow); color: var(--yellow-ink);
  font-weight: 700; font-size: 1.02rem;
  padding: 13px 24px; border-radius: 9px;
  font-family: "Sora", sans-serif;
  transition: transform .15s ease, background .15s ease;
}
.btn-primary:hover { background: var(--yellow-hi); text-decoration: none; transform: translateY(-1px); }
.btn-primary .arrow { font-family: "IBM Plex Mono", monospace; }
.reassure { font-size: .86rem; color: var(--ink-dim); font-family: "IBM Plex Mono", monospace; }
.secondary { margin-top: 18px; font-size: .92rem; color: var(--ink-dim); }
.secondary a { color: var(--ink-dim); font-family: "IBM Plex Mono", monospace; font-size: .86rem; }
.secondary a:hover { color: var(--yellow); }

/* ---- hero code motif ---- */
.code-card {
  background: var(--bg-raise);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}
.code-top {
  display: flex; align-items: center; gap: 10px;
  padding: 11px 16px; border-bottom: 1px solid var(--line-soft);
}
.code-top .fname {
  font-family: "IBM Plex Mono", monospace; font-size: .78rem; color: var(--ink-dim);
  margin-left: 4px;
}
.dots { display: flex; gap: 6px; }
.dots i { width: 9px; height: 9px; border-radius: 50%; background: var(--line); display: block; }
pre {
  margin: 0; padding: 18px 20px 20px;
  font-family: "IBM Plex Mono", monospace;
  font-size: .8rem; line-height: 1.65;
  color: var(--ink); overflow-x: auto;
}
pre .c { color: var(--ink-faint); }      /* comment */
pre .k { color: var(--yellow); }          /* keyword */
pre .s { color: var(--string); }          /* string */
pre .d { color: var(--ink-dim); }         /* dim punctuation */
.code-cap {
  font-family: "IBM Plex Mono", monospace; font-size: .74rem;
  color: var(--ink-dim); padding: 0 20px 16px; line-height: 1.5;
}
@media (max-width: 880px) {
  .hero { grid-template-columns: 1fr; gap: 36px; padding: 40px 0 44px; }
  h1 { max-width: 20ch; }
}

/* ---- section frame ---- */
section { padding: 58px 0; border-top: 1px solid var(--line-soft); }
.sec-label {
  font-family: "IBM Plex Mono", monospace; font-size: .78rem;
  color: var(--yellow); margin-bottom: 10px; letter-spacing: .01em;
}
.sec-label::before { content: "// "; color: var(--ink-faint); }
h2 { font-size: 1.55rem; font-weight: 600; letter-spacing: -0.02em; color: var(--ink); }
.sec-sub { color: var(--ink-dim); max-width: 62ch; margin-top: 10px; font-size: 1.02rem; }

/* ---- the build log / changelog ---- */
.log { margin-top: 36px; }
.ep {
  display: grid; grid-template-columns: 78px 1fr auto;
  gap: 24px; align-items: baseline;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-soft);
}
.ep:first-child { border-top: 1px solid var(--line-soft); }
.ep .tag {
  font-family: "IBM Plex Mono", monospace; font-size: .82rem;
  color: var(--yellow); font-weight: 500;
}
.ep .what h3 {
  font-size: 1.06rem; font-weight: 600; color: var(--ink);
  display: flex; align-items: center; gap: 9px; flex-wrap: wrap;
}
.ep .what h3 .verb { color: var(--ink-dim); font-weight: 500; }
.ep .what p {
  color: var(--ink-dim); font-size: .94rem; margin-top: 3px; max-width: 64ch;
}
.ep .links {
  display: flex; gap: 16px; justify-self: end; white-space: nowrap;
}
.ep .links a {
  font-family: "IBM Plex Mono", monospace; font-size: .78rem; color: var(--ink-dim);
  transition: color .15s ease;
}
.ep .links a:hover { color: var(--yellow); text-decoration: none; }
.ep .links .read { color: var(--yellow); }
@media (max-width: 720px) {
  .ep { grid-template-columns: 1fr; gap: 7px; padding: 18px 0; }
  .ep .links { justify-self: start; margin-top: 4px; }
}

/* ---- chandra note ---- */
.note {
  border-left: 3px solid var(--yellow);
  padding: 4px 0 4px 22px;
  max-width: 60ch;
}
.note p { font-size: 1.22rem; line-height: 1.55; color: var(--ink); font-weight: 400; }
.note .by {
  margin-top: 16px; font-family: "IBM Plex Mono", monospace;
  font-size: .82rem; color: var(--ink-dim);
}
.note .by b { color: var(--ink); font-weight: 500; }

/* ---- closing CTA ---- */
.close { text-align: left; }
.close h2 { font-size: 1.85rem; max-width: 18ch; }
.close .cta-row { margin-top: 26px; }

/* ---- footer ---- */
footer {
  border-top: 1px solid var(--line-soft);
  padding: 28px 0 46px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 14px;
  color: var(--ink-dim); font-size: .82rem;
  font-family: "IBM Plex Mono", monospace;
}
footer .links { display: flex; gap: 22px; }
footer a { color: var(--ink-dim); }
footer a:hover { color: var(--yellow); text-decoration: none; }

/* ---- blog article (long-form on navy, shared by every post) ---- */
.post { max-width: 660px; margin: 0 auto; padding: 52px 0 8px; }
.post .eyebrow {
  font-family: "IBM Plex Mono", monospace; font-size: .8rem;
  color: var(--yellow); letter-spacing: .02em;
}
.post h1 {
  font-size: clamp(1.9rem, 4.4vw, 2.7rem);
  line-height: 1.12; letter-spacing: -0.02em; color: var(--ink);
  max-width: 18ch; margin: 14px 0 16px;
}
.post .dek { font-size: 1.18rem; color: var(--ink-dim); line-height: 1.5; }
.post .meta {
  font-family: "IBM Plex Mono", monospace; font-size: .82rem; color: var(--ink-dim);
  margin-top: 20px; padding-bottom: 26px; border-bottom: 1px solid var(--line-soft);
}
.post .rule { margin-top: 16px; }
/* the 9/16 episode Short, kept embedded */
.short {
  position: relative; width: 100%; max-width: 320px; margin: 30px auto 8px;
  aspect-ratio: 9 / 16; border-radius: 14px; overflow: hidden;
  border: 1px solid var(--line);
}
.short iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.short-cap {
  text-align: center; font-family: "IBM Plex Mono", monospace;
  font-size: .82rem; margin-bottom: 8px;
}
.post h2 {
  font-size: 1.4rem; font-weight: 600; color: var(--ink);
  letter-spacing: -0.015em; margin: 38px 0 12px;
}
.post p { margin: 16px 0; color: var(--ink); max-width: 68ch; }
.post p.lead { font-size: 1.12rem; }
.post strong { color: var(--ink); font-weight: 600; }
.post ol, .post ul { margin: 16px 0 16px 22px; color: var(--ink); max-width: 66ch; }
.post li { margin: 8px 0; }
/* article code block — raised navy panel, brand tokens */
.post pre {
  background: var(--bg-raise); border: 1px solid var(--line);
  border-radius: 12px; padding: 18px 20px; margin: 22px 0;
  font-size: .82rem; line-height: 1.6; color: var(--ink);
}
.post pre code { color: var(--ink); font-family: "IBM Plex Mono", monospace; }
.post p code, .post li code {
  background: var(--bg-raise); border: 1px solid var(--line-soft);
  border-radius: 6px; padding: 1px 6px; font-size: .86em; color: var(--string);
  font-family: "IBM Plex Mono", monospace;
}
/* next-episode card */
.next {
  background: var(--bg-raise); border: 1px solid var(--line);
  border-radius: 12px; padding: 20px 22px; margin: 38px 0;
}
.next .eyebrow { color: var(--string); }
.next h3 { font-size: 1.08rem; color: var(--ink); margin: 8px 0; font-weight: 600; }
.next h3 a { color: var(--ink); }
.next h3 a:hover { color: var(--yellow); }
.next p { color: var(--ink-dim); margin: 0; max-width: none; }
/* large faint racing-line S sign-off above the back-to-series link (shared by every post) */
.post-sign { display: block; width: 88px; height: auto; margin: 52px auto 6px; opacity: .12; }
.back { display: inline-block; margin: 28px 0 8px; font-family: "IBM Plex Mono", monospace; font-size: .86rem; }

@media (max-width: 420px) {
  body { font-size: 16px; }
  .wrap { padding: 0 20px; }
  .hero { padding: 28px 0 36px; }
  h1 { font-size: 2rem; }
  .hero p.sub { font-size: 1.04rem; }
  .post { padding: 32px 0 8px; }
}