/* ==========================================================================
   ISO 100 — editorial notebook theme
   Hand rolled layer on top of self hosted Bulma. All framework defaults are
   re skinned here so no stock Bulma look survives.
   Seed fingerprint: isoq / 926781462
   ========================================================================== */

:root {
  /* Bulma customisation variables (our own tokens, not compiled Sass) */
  --isoq-paper: #f3ece3;
  --isoq-paper-deep: #e8dccd;
  --isoq-paper-light: #fbf7f1;
  --isoq-ink: #262322;
  --isoq-ink-soft: #5b534d;
  --isoq-ink-faint: #8a7f76;
  --isoq-charcoal: #3e3637;
  --isoq-charcoal-soft: #564c4d;
  --isoq-ink-blue: #085dad;
  --isoq-ink-blue-deep: #053664;
  --isoq-ink-blue-bright: #0e84f4;
  --isoq-rust: #a9552f;
  --isoq-rust-soft: #e8c8b4;
  --isoq-rule: rgba(62, 54, 55, 0.18);
  --isoq-rule-strong: rgba(62, 54, 55, 0.36);
  --isoq-radius: 3px;
  --isoq-shadow-photo: 0 10px 24px rgba(38, 35, 34, 0.18);
  --isoq-shadow-card: 0 1px 0 rgba(255, 255, 255, 0.6);
  --isoq-rail: 252px;
  --isoq-measure: 46rem;
  --isoq-font: "Roboto Slab", Cambria, Georgia, "Times New Roman", serif;
  --isoq-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --isoq-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background: var(--isoq-paper);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body.isoq-body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--isoq-font);
  font-weight: 300;
  font-size: 1.0625rem;
  line-height: 1.76;
  color: var(--isoq-ink);
  background-color: var(--isoq-paper);
  background-image: url("../img/cream.png");
  background-repeat: repeat;
  background-position: 0 0;
  text-rendering: optimizeLegibility;
}

.isoq-body ::selection {
  background: var(--isoq-rust-soft);
  color: var(--isoq-ink);
}

.isoq-body a {
  color: var(--isoq-ink-blue);
  text-decoration: none;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: color 160ms var(--isoq-ease);
}

.isoq-body a:visited {
  color: var(--isoq-ink-blue-deep);
}

.isoq-body a:hover,
.isoq-body a:focus {
  color: var(--isoq-ink-blue-bright);
  text-decoration: underline;
}

.isoq-body :focus-visible {
  outline: 3px solid var(--isoq-rust);
  outline-offset: 3px;
  border-radius: 2px;
}

.isoq-skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--isoq-charcoal);
  color: #fff;
  padding: 0.75rem 1.25rem;
  font-size: 0.9rem;
}

.isoq-skip:focus {
  left: 1rem;
  top: 1rem;
  color: #fff;
}

/* --------------------------------------------------------------------------
   Shell
   -------------------------------------------------------------------------- */

.isoq-shell {
  display: grid;
  grid-template-columns: var(--isoq-rail) minmax(0, 1fr);
  gap: clamp(1.75rem, 4.4vw, 4.5rem);
  max-width: 1230px;
  margin: 0 auto;
  padding: 2.25rem 1.5rem 0;
  align-items: start;
}

.isoq-rail {
  position: sticky;
  top: 1.75rem;
  align-self: start;
}

.isoq-brand {
  display: block;
  background: var(--isoq-charcoal);
  color: #fff;
  border-radius: var(--isoq-radius);
  padding: 1.35rem 1.1rem 1.15rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.isoq-brand:hover,
.isoq-brand:focus {
  color: #fff;
  text-decoration: none;
}

.isoq-brand::after {
  content: "";
  position: absolute;
  inset: auto -18% -55% auto;
  width: 9rem;
  height: 9rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 50%;
  pointer-events: none;
}

.isoq-brand__word {
  display: block;
  font-size: 2.15rem;
  line-height: 1;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #fff;
}

.isoq-brand__sub {
  display: block;
  margin-top: 0.55rem;
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.72);
}

.isoq-nav {
  list-style: none;
  margin: 1.1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.2rem;
}

.isoq-nav a {
  display: block;
  padding: 0.42rem 0.7rem;
  border-radius: var(--isoq-radius);
  text-align: right;
  font-size: 0.98rem;
  letter-spacing: 0.02em;
  color: var(--isoq-ink-soft);
  transition: background 160ms var(--isoq-ease), color 160ms var(--isoq-ease);
}

.isoq-nav a:hover,
.isoq-nav a:focus {
  background: rgba(62, 54, 55, 0.08);
  color: var(--isoq-charcoal);
  text-decoration: none;
}

.isoq-nav a.is-current {
  background: var(--isoq-charcoal);
  color: #fff;
}

.isoq-rail__note {
  margin: 1.5rem 0.2rem 0;
  padding-top: 1rem;
  border-top: 1px solid var(--isoq-rule);
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--isoq-ink-faint);
  text-align: right;
}

.isoq-rail__note p {
  margin: 0 0 0.55rem;
}

.isoq-rail__rss {
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.isoq-main {
  min-width: 0;
  padding-bottom: 3rem;
}

/* --------------------------------------------------------------------------
   Typography helpers
   -------------------------------------------------------------------------- */

.isoq-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 0.9rem;
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--isoq-rust);
}

.isoq-eyebrow::before {
  content: "";
  width: 1.6rem;
  height: 1px;
  background: var(--isoq-rust);
}

.isoq-display {
  margin: 0;
  font-family: var(--isoq-font);
  font-weight: 400;
  font-size: clamp(2.5rem, 6vw, 4.35rem);
  line-height: 1.02;
  letter-spacing: -0.014em;
  color: var(--isoq-charcoal);
}

.isoq-display em {
  font-style: normal;
  color: var(--isoq-rust);
  white-space: nowrap;
}

.isoq-lede {
  max-width: var(--isoq-measure);
  margin: 1.1rem 0 0;
  font-size: clamp(1.08rem, 1.9vw, 1.34rem);
  line-height: 1.62;
  font-weight: 300;
  color: var(--isoq-ink-soft);
}

.isoq-section-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin: 0 0 1.4rem;
  padding-bottom: 0.6rem;
  border-bottom: 2px solid var(--isoq-charcoal);
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--isoq-charcoal);
}

.isoq-section-title a {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--isoq-ink-blue);
}

/* --------------------------------------------------------------------------
   Masthead
   -------------------------------------------------------------------------- */

.isoq-masthead {
  padding: clamp(0.5rem, 2vw, 1.5rem) 0 clamp(2rem, 5vw, 3.5rem);
  border-bottom: 1px solid var(--isoq-rule);
}

.isoq-masthead__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.4rem;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--isoq-ink-faint);
}

.isoq-masthead__meta li {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.isoq-masthead__meta li + li::before {
  content: "";
  width: 3px;
  height: 3px;
  background: var(--isoq-rust);
  border-radius: 50%;
  margin-right: 0.9rem;
}

.isoq-masthead__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

/* --------------------------------------------------------------------------
   Buttons — flat charcoal with rust edge, 3px radius from the footprint
   -------------------------------------------------------------------------- */

.isoq-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  height: auto;
  min-height: 2.85rem;
  line-height: 1.2;
  padding: 0.72rem 1.25rem;
  border: 1px solid var(--isoq-charcoal);
  border-radius: var(--isoq-radius);
  background: var(--isoq-charcoal);
  color: #fff;
  font-family: var(--isoq-font);
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 160ms var(--isoq-ease), color 160ms var(--isoq-ease),
    transform 160ms var(--isoq-ease);
}

.isoq-btn:hover,
.isoq-btn:focus {
  background: var(--isoq-rust);
  border-color: var(--isoq-rust);
  color: #fff;
  text-decoration: none;
  transform: translateY(-1px);
}

.isoq-btn--ghost {
  background: transparent;
  color: var(--isoq-charcoal);
}

.isoq-body a.isoq-btn {
  color: #fff;
}

.isoq-body a.isoq-btn--ghost {
  color: var(--isoq-charcoal);
}

.isoq-body a.isoq-btn:hover,
.isoq-body a.isoq-btn:focus {
  color: #fff;
}

.isoq-body a.isoq-btn--ghost:hover,
.isoq-body a.isoq-btn--ghost:focus {
  color: #fff;
}

.isoq-btn--ghost:hover,
.isoq-btn--ghost:focus {
  background: var(--isoq-charcoal);
  border-color: var(--isoq-charcoal);
  color: #fff;
}

/* --------------------------------------------------------------------------
   Home
   -------------------------------------------------------------------------- */

.isoq-home {
  padding-top: 2.4rem;
}

.isoq-feature {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 3vw, 3rem);
  padding-bottom: 2.6rem;
  border-bottom: 1px solid var(--isoq-rule);
}

.isoq-feature__body {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.isoq-feature__kicker {
  margin: 0 0 0.7rem;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--isoq-rust);
}

.isoq-feature__title {
  margin: 0;
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  line-height: 1.14;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.isoq-feature__title a {
  color: var(--isoq-charcoal);
}

.isoq-feature__title a:hover {
  color: var(--isoq-rust);
  text-decoration: none;
}

.isoq-feature__text {
  margin: 0.9rem 0 0;
  color: var(--isoq-ink-soft);
  font-size: 1.02rem;
}

.isoq-feature__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.8rem 1.2rem;
  margin-top: 1.35rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--isoq-ink-faint);
}

.isoq-feature__side {
  position: relative;
  align-self: stretch;
  min-height: 220px;
  border: 1px solid var(--isoq-rule-strong);
  border-radius: var(--isoq-radius);
  background: var(--isoq-paper-light);
  padding: 1.35rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
}

.isoq-feature__side::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    0deg,
    transparent 0,
    transparent 27px,
    rgba(62, 54, 55, 0.06) 27px,
    rgba(62, 54, 55, 0.06) 28px
  );
  pointer-events: none;
}

.isoq-feature__side-title {
  margin: 0;
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--isoq-charcoal);
}

.isoq-feature__side ul {
  position: relative;
  margin: 0.8rem 0 0;
  padding: 0;
  list-style: none;
}

.isoq-feature__side li {
  margin: 0;
  padding: 0.55rem 0;
  border-top: 1px solid var(--isoq-rule);
  font-size: 0.9rem;
  line-height: 1.45;
}

.isoq-feature__side li a {
  color: var(--isoq-ink);
}

.isoq-feature__side li a:hover {
  color: var(--isoq-rust);
  text-decoration: none;
}

.isoq-feature__side time {
  display: block;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--isoq-ink-faint);
}

.isoq-home__block {
  padding: 2.6rem 0;
  border-bottom: 1px solid var(--isoq-rule);
}

.isoq-ledger {
  list-style: none;
  margin: 0;
  padding: 0;
}

.isoq-ledger > li {
  display: grid;
  grid-template-columns: 7.5rem minmax(0, 1fr);
  gap: 1.4rem;
  padding: 1.15rem 0;
  border-top: 1px solid var(--isoq-rule);
}

.isoq-ledger > li:first-child {
  border-top: 0;
  padding-top: 0;
}

.isoq-ledger time {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--isoq-ink-faint);
  padding-top: 0.3rem;
}

.isoq-ledger h3 {
  margin: 0;
  font-size: 1.22rem;
  line-height: 1.35;
  font-weight: 400;
}

.isoq-ledger h3 a {
  color: var(--isoq-ink);
}

.isoq-ledger h3 a:hover {
  color: var(--isoq-rust);
  text-decoration: none;
}

.isoq-ledger p {
  margin: 0.35rem 0 0;
  font-size: 0.94rem;
  line-height: 1.6;
  color: var(--isoq-ink-soft);
}

.isoq-about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 3vw, 3rem);
  align-items: start;
}

.isoq-about-grid p {
  margin: 0 0 1rem;
}

.isoq-portrait {
  border: 1px solid var(--isoq-rule-strong);
  border-radius: var(--isoq-radius);
  background: var(--isoq-paper-light);
  padding: 1.2rem;
  text-align: center;
}

.isoq-portrait__mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--isoq-rule);
  border-radius: 50%;
  margin: 0 auto 1rem;
  max-width: 9.5rem;
  font-size: 2.4rem;
  letter-spacing: 0.08em;
  color: var(--isoq-charcoal);
  background: repeating-radial-gradient(
    circle at 50% 50%,
    rgba(62, 54, 55, 0.06) 0,
    rgba(62, 54, 55, 0.06) 1px,
    transparent 1px,
    transparent 10px
  );
}

.isoq-portrait p {
  margin: 0;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--isoq-ink-faint);
}

/* --------------------------------------------------------------------------
   Chips / categories
   -------------------------------------------------------------------------- */

.isoq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.isoq-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  height: auto;
  line-height: 1.5;
  padding: 0.32rem 0.7rem;
  border: 1px solid var(--isoq-rule-strong);
  border-radius: var(--isoq-radius);
  background: var(--isoq-paper-light);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--isoq-ink-soft);
  transition: border-color 140ms var(--isoq-ease), color 140ms var(--isoq-ease),
    background 140ms var(--isoq-ease);
}

.isoq-chip:hover,
.isoq-chip:focus {
  border-color: var(--isoq-rust);
  color: var(--isoq-rust);
  background: #fff;
  text-decoration: none;
}

.isoq-chip.is-current {
  background: var(--isoq-charcoal);
  border-color: var(--isoq-charcoal);
  color: #fff;
}

.isoq-chip__count {
  font-size: 0.66rem;
  color: var(--isoq-ink-faint);
}

.isoq-body a.isoq-chip {
  color: var(--isoq-ink-soft);
}

.isoq-body a.isoq-chip:hover,
.isoq-body a.isoq-chip:focus {
  color: var(--isoq-rust);
}

.isoq-body a.isoq-chip.is-current {
  color: #fff;
}

.isoq-chip.is-current .isoq-chip__count {
  color: rgba(255, 255, 255, 0.7);
}

.isoq-catgrid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(11rem, 1fr));
  gap: 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.isoq-catgrid a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 0.85rem;
  border: 1px solid var(--isoq-rule);
  border-left: 3px solid var(--isoq-rust);
  border-radius: var(--isoq-radius);
  background: rgba(255, 255, 255, 0.42);
  color: var(--isoq-ink);
  font-size: 0.92rem;
  transition: background 150ms var(--isoq-ease), border-color 150ms var(--isoq-ease);
}

.isoq-catgrid a:hover,
.isoq-catgrid a:focus {
  background: #fff;
  border-color: var(--isoq-rule-strong);
  color: var(--isoq-charcoal);
  text-decoration: none;
}

.isoq-catgrid span {
  font-size: 0.7rem;
  color: var(--isoq-ink-faint);
  white-space: nowrap;
  flex-shrink: 0;
  margin-left: auto;
}

.isoq-chiprow {
  margin-top: 1.2rem;
}

.isoq-ledger__topic {
  margin-top: 0.45rem;
}

/* --------------------------------------------------------------------------
   Article
   -------------------------------------------------------------------------- */

.isoq-article-head {
  padding-bottom: 1.6rem;
  border-bottom: 1px solid var(--isoq-rule);
}

.isoq-article-head h1 {
  margin: 0;
  font-size: clamp(2rem, 4.4vw, 3.1rem);
  line-height: 1.1;
  font-weight: 400;
  letter-spacing: -0.012em;
  color: var(--isoq-charcoal);
}

.isoq-article-deck {
  max-width: var(--isoq-measure);
  margin: 1rem 0 0;
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--isoq-ink-soft);
}

.isoq-article-grid {
  display: grid;
  grid-template-columns: 10.5rem minmax(0, var(--isoq-measure));
  gap: clamp(1.5rem, 3.5vw, 3rem);
  padding-top: 2rem;
  align-items: start;
}

.isoq-article-meta {
  position: sticky;
  top: 2rem;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--isoq-ink-soft);
}

.isoq-article-meta dl {
  margin: 0;
}

.isoq-article-meta dt {
  margin-top: 1rem;
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--isoq-ink-faint);
}

.isoq-article-meta dt:first-child {
  margin-top: 0;
}

.isoq-article-meta dd {
  margin: 0.25rem 0 0;
}

.isoq-article-meta dd a {
  color: var(--isoq-ink-blue);
}

.isoq-prose {
  min-width: 0;
  font-size: 1.08rem;
  line-height: 1.82;
}

.isoq-prose > :first-child {
  margin-top: 0;
}

.isoq-prose p {
  margin: 0 0 1.35rem;
}

.isoq-prose h2,
.isoq-prose h3,
.isoq-prose h4 {
  margin: 2.2rem 0 0.8rem;
  line-height: 1.3;
  font-weight: 400;
  color: var(--isoq-charcoal);
}

.isoq-prose h2 {
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--isoq-rule);
}

.isoq-prose h3 {
  font-size: 1.32rem;
}

.isoq-prose h4 {
  font-size: 1.08rem;
}

.isoq-prose ul,
.isoq-prose ol {
  margin: 0 0 1.4rem;
  padding-left: 1.3rem;
}

.isoq-prose li {
  margin-bottom: 0.45rem;
}

.isoq-prose ul li::marker {
  color: var(--isoq-rust);
}

.isoq-prose blockquote {
  margin: 1.8rem 0;
  padding: 0.4rem 0 0.4rem 1.25rem;
  border-left: 3px solid var(--isoq-rust);
  color: var(--isoq-ink-soft);
  font-size: 1.04rem;
}

.isoq-prose blockquote p:last-child {
  margin-bottom: 0;
}

.isoq-prose pre {
  margin: 0 0 1.5rem;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  background: var(--isoq-charcoal);
  color: #f4efe8;
  border-radius: var(--isoq-radius);
  font-size: 0.86rem;
  line-height: 1.6;
}

.isoq-prose code {
  font-family: var(--isoq-mono);
  font-size: 0.9em;
  background: rgba(62, 54, 55, 0.09);
  padding: 0.08em 0.32em;
  border-radius: 2px;
}

.isoq-prose pre code {
  background: transparent;
  padding: 0;
  font-size: inherit;
  color: inherit;
}

.isoq-prose img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 1.8rem auto;
  padding: 0.6rem;
  background: #fff;
  border-radius: var(--isoq-radius);
  box-shadow: var(--isoq-shadow-photo);
}

.isoq-prose hr {
  border: 0;
  border-top: 1px solid var(--isoq-rule);
  margin: 2rem 0;
}

.isoq-note {
  margin: 1.8rem 0;
  padding: 1rem 1.15rem;
  border: 1px solid var(--isoq-rule);
  border-left: 3px solid var(--isoq-rust);
  border-radius: var(--isoq-radius);
  background: rgba(255, 255, 255, 0.55);
  font-size: 0.98rem;
}

.isoq-note > :last-child {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Article rail (links / related)
   -------------------------------------------------------------------------- */

.isoq-railbox {
  margin-top: 2.4rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--isoq-rule);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1.5rem;
}

.isoq-railbox h2 {
  margin: 0 0 0.6rem;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--isoq-charcoal);
}

.isoq-railbox ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.isoq-railbox li {
  padding: 0.42rem 0;
  border-top: 1px solid var(--isoq-rule);
  font-size: 0.9rem;
  line-height: 1.5;
}

.isoq-railbox li:first-child {
  border-top: 0;
}

.isoq-railbox li a {
  color: var(--isoq-ink-blue);
}

.isoq-railbox li .isoq-ext::after {
  content: "\2197";
  font-size: 0.8em;
  margin-left: 0.3em;
  color: var(--isoq-ink-faint);
}

.isoq-postnav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.2rem;
  padding-top: 1.2rem;
  border-top: 2px solid var(--isoq-charcoal);
  font-size: 0.82rem;
}

.isoq-postnav a {
  max-width: 46%;
  color: var(--isoq-ink);
}

.isoq-postnav a:hover {
  color: var(--isoq-rust);
  text-decoration: none;
}

.isoq-postnav span {
  display: block;
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--isoq-ink-faint);
}

.isoq-postnav .isoq-postnav__next {
  text-align: right;
  margin-left: auto;
}

/* --------------------------------------------------------------------------
   Listing pages
   -------------------------------------------------------------------------- */

.isoq-listing-head {
  padding-bottom: 1.4rem;
  border-bottom: 2px solid var(--isoq-charcoal);
}

.isoq-listing-head h1 {
  margin: 0;
  font-size: clamp(1.9rem, 4vw, 2.9rem);
  line-height: 1.12;
  font-weight: 400;
  color: var(--isoq-charcoal);
}

.isoq-listing-head p {
  max-width: 40rem;
  margin: 0.7rem 0 0;
  color: var(--isoq-ink-soft);
}

.isoq-listing {
  margin-top: 0.5rem;
}

.isoq-entry {
  padding: 1.7rem 0;
  border-bottom: 1px solid var(--isoq-rule);
}

.isoq-entry__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  margin: 0 0 0.55rem;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--isoq-ink-faint);
}

.isoq-entry__meta a {
  color: var(--isoq-rust);
}

.isoq-entry h2 {
  margin: 0;
  font-size: clamp(1.35rem, 2.4vw, 1.72rem);
  line-height: 1.3;
  font-weight: 400;
}

.isoq-entry h2 a {
  color: var(--isoq-ink);
}

.isoq-entry h2 a:hover {
  color: var(--isoq-rust);
  text-decoration: none;
}

.isoq-entry p {
  max-width: 44rem;
  margin: 0.55rem 0 0;
  color: var(--isoq-ink-soft);
}

.isoq-entry__more {
  display: inline-block;
  margin-top: 0.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.isoq-pager {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--isoq-rule);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.isoq-pager__state {
  color: var(--isoq-ink-faint);
}

.isoq-pager a {
  color: var(--isoq-ink-blue);
}

.isoq-pager .is-disabled {
  color: var(--isoq-ink-faint);
}

/* --------------------------------------------------------------------------
   About page
   -------------------------------------------------------------------------- */

.isoq-about-hero {
  padding-bottom: 1.8rem;
  border-bottom: 1px solid var(--isoq-rule);
}

.isoq-about-body {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 3.5vw, 3.2rem);
  padding-top: 2rem;
  align-items: start;
}

.isoq-about-body .isoq-prose {
  columns: 1;
}

.isoq-factbox {
  border: 1px solid var(--isoq-rule-strong);
  border-radius: var(--isoq-radius);
  background: var(--isoq-paper-light);
  padding: 1.3rem;
}

.isoq-factbox h2 {
  margin: 0 0 0.8rem;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--isoq-rust);
}

.isoq-factbox dl {
  margin: 0;
  font-size: 0.88rem;
}

.isoq-factbox dt {
  margin-top: 0.8rem;
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--isoq-ink-faint);
}

.isoq-factbox dt:first-child {
  margin-top: 0;
}

.isoq-factbox dd {
  margin: 0.2rem 0 0;
  color: var(--isoq-ink);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.isoq-footer {
  margin-top: 3rem;
  padding: 2rem 0 1.4rem;
  border-top: 2px solid var(--isoq-charcoal);
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
  font-size: 0.82rem;
  line-height: 1.6;
}

.isoq-footer--home {
  grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr));
}

.isoq-footer h2 {
  margin: 0 0 0.6rem;
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--isoq-charcoal);
}

.isoq-footer p {
  margin: 0;
  color: var(--isoq-ink-soft);
}

.isoq-footer ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.isoq-footer li {
  margin-bottom: 0.3rem;
}

.isoq-footer a {
  color: var(--isoq-ink-blue);
}

.isoq-footer__brand {
  font-size: 1.1rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--isoq-charcoal);
}

.isoq-colophon {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  margin-top: 1.2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--isoq-rule);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--isoq-ink-faint);
}

/* --------------------------------------------------------------------------
   Reveal motion (seed: moderate, disabled for reduced motion)
   -------------------------------------------------------------------------- */

.isoq-reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 560ms var(--isoq-ease), transform 560ms var(--isoq-ease);
}

.isoq-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1023px) {
  .isoq-shell {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
    padding: 0 1.15rem;
  }

  .isoq-rail {
    position: static;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--isoq-rule);
    margin-bottom: 0.5rem;
  }

  .isoq-brand {
    display: flex;
    align-items: baseline;
    gap: 0.7rem;
    padding: 0.6rem 0.9rem;
    text-align: left;
  }

  .isoq-brand__word {
    font-size: 1.5rem;
  }

  .isoq-brand__sub {
    margin: 0;
    font-size: 0.6rem;
    letter-spacing: 0.16em;
  }

  .isoq-brand::after {
    display: none;
  }

  .isoq-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    margin: 0 0 0 auto;
  }

  .isoq-nav a {
    text-align: center;
    padding: 0.42rem 0.6rem;
    font-size: 0.86rem;
  }

  .isoq-rail__note {
    display: none;
  }

  .isoq-feature {
    grid-template-columns: minmax(0, 1fr);
  }

  .isoq-feature__side {
    min-height: 0;
  }

  .isoq-footer {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 719px) {
  body.isoq-body {
    font-size: 1rem;
    line-height: 1.72;
  }

  .isoq-shell {
    padding: 0 1rem;
  }

  .isoq-rail {
    justify-content: space-between;
  }

  .isoq-nav {
    width: 100%;
    margin: 0;
    border-top: 1px solid var(--isoq-rule);
    padding-top: 0.4rem;
  }

  .isoq-nav a {
    flex: 1 1 0;
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }

  .isoq-ledger > li {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.3rem;
  }

  .isoq-ledger time {
    padding-top: 0;
  }

  .isoq-article-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.2rem;
  }

  .isoq-article-meta {
    position: static;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--isoq-rule);
  }

  .isoq-about-grid,
  .isoq-about-body {
    grid-template-columns: minmax(0, 1fr);
  }

  .isoq-footer {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.2rem;
  }

  .isoq-masthead__meta li + li::before {
    display: none;
  }

  .isoq-railbox {
    grid-template-columns: minmax(0, 1fr);
  }

  .isoq-prose {
    font-size: 1.02rem;
  }

  .isoq-prose pre {
    font-size: 0.78rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .isoq-reveal {
    opacity: 1;
    transform: none;
  }
}

@media print {
  .isoq-rail,
  .isoq-footer,
  .isoq-postnav,
  .isoq-railbox {
    display: none;
  }

  .isoq-shell {
    display: block;
    max-width: 100%;
  }

  body.isoq-body {
    background: #fff;
  }
}