@import url('https://fonts.googleapis.com/css2?family=Crimson+Pro:wght@400;600;700&family=Barlow+Semi+Condensed:wght@300;400;600&display=swap');

:root {
  --qbn-ink: #1b0f2e;
  --qbn-parchment: #f3eff8;
  --qbn-plum: #6b2d7b;
  --qbn-mauve: #d4a0c7;
  --qbn-slate: #3e2c5a;
  --qbn-mist: #e8ddf0;
  --qbn-berry: #8e3a6f;
  --qbn-cloud: #faf7fc;
  --qbn-shadow: rgba(27, 15, 46, 0.12);
  --qbn-rail-w: 58px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body.qbn-frame {
  font-family: 'Barlow Semi Condensed', sans-serif;
  font-weight: 400;
  color: var(--qbn-ink);
  background: var(--qbn-parchment);
  display: flex;
  min-height: 100vh;
  line-height: 1.72;
}

h1, h2, h3, h4 {
  font-family: 'Crimson Pro', serif;
  font-weight: 700;
  line-height: 1.25;
  color: var(--qbn-slate);
}

h1 { font-size: 2.35rem; margin-bottom: 1rem; }
h2 { font-size: 1.7rem; margin-bottom: 0.85rem; }
h3 { font-size: 1.3rem; margin-bottom: 0.65rem; }

a {
  color: var(--qbn-plum);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover { color: var(--qbn-berry); }

p {
  margin-bottom: 1.1rem;
}

/* ═══════ SIDEBAR / RAIL ═══════ */
.qbn-rail {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--qbn-rail-w);
  height: 100vh;
  background: var(--qbn-slate);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.4rem 0;
  gap: 1.6rem;
  z-index: 900;
}

.qbn-rail-mark {
  color: var(--qbn-mauve);
  display: flex;
  align-items: center;
  justify-content: center;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(212, 160, 199, 0.25);
}

.qbn-rail-node {
  color: rgba(212, 160, 199, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.45rem;
  border-radius: 8px;
  transition: background 0.2s, color 0.2s;
}
.qbn-rail-node:hover {
  background: rgba(212, 160, 199, 0.12);
  color: var(--qbn-mauve);
}

/* ═══════ VIEWPORT ═══════ */
.qbn-viewport {
  margin-left: var(--qbn-rail-w);
  flex: 1;
  min-width: 0;
}

.qbn-shell {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2.5rem 2rem;
}

/* ═══════ CITIES TABLE ═══════ */
.qbn-locale-grid {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-bottom: 3rem;
  background: var(--qbn-cloud);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 2px 12px var(--qbn-shadow);
}

.qbn-locale-caption {
  text-align: left;
  padding: 1.6rem 1.8rem 1rem;
  background: var(--qbn-slate);
  color: var(--qbn-mist);
  caption-side: top;
}
.qbn-locale-caption h2 { color: var(--qbn-mauve); margin-bottom: 0.5rem; }
.qbn-locale-caption p { color: rgba(232, 221, 240, 0.8); margin-bottom: 0; }

.qbn-locale-th {
  text-align: left;
  padding: 0.85rem 1.4rem;
  background: var(--qbn-plum);
  color: var(--qbn-parchment);
  font-family: 'Crimson Pro', serif;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
}

.qbn-locale-row:nth-child(even) { background: var(--qbn-mist); }

.qbn-locale-cell {
  padding: 0.9rem 1.4rem;
  vertical-align: top;
  border-bottom: 1px solid rgba(107, 45, 123, 0.08);
  font-size: 0.94rem;
}
.qbn-locale-cell a {
  font-weight: 600;
  font-family: 'Crimson Pro', serif;
  font-size: 1.05rem;
}

/* ═══════ CTA / PROMPT ═══════ */
.qbn-prompt-wrap {
  margin-bottom: 3rem;
  background: linear-gradient(135deg, var(--qbn-plum), var(--qbn-berry));
  border-radius: 12px;
  padding: 2.5rem 2rem;
  color: var(--qbn-parchment);
}

.qbn-prompt-inner {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

.qbn-prompt-left { flex: 1; }
.qbn-prompt-left h2 { color: var(--qbn-cloud); }
.qbn-prompt-left p { color: rgba(243, 239, 248, 0.85); }

/* Asymmetric nesting: right column deeply nested */
.qbn-prompt-right { flex: 0 0 240px; }
.qbn-prompt-right-inner { padding: 0.5rem; }
.qbn-prompt-right-deep { padding: 0.5rem; border-left: 2px solid rgba(255,255,255,0.15); }
.qbn-prompt-right-core { display: flex; flex-direction: column; gap: 0.6rem; }

.qbn-prompt-accent {
  display: block;
  background: rgba(255, 255, 255, 0.12);
  padding: 0.55rem 1rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  text-align: center;
}

.qbn-prompt-note {
  margin-top: 1rem;
  font-size: 0.82rem;
  opacity: 0.7;
  text-align: center;
}

/* ═══════ BLOG / DIGEST ═══════ */
.qbn-digest {
  margin-bottom: 3rem;
}
.qbn-digest h2 { margin-bottom: 1.2rem; }

.qbn-digest-mosaic {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.4rem;
}

.qbn-digest-piece {
  background: var(--qbn-cloud);
  border-radius: 8px;
  padding: 1.4rem;
  box-shadow: 0 1px 6px var(--qbn-shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}
.qbn-digest-piece:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 16px var(--qbn-shadow);
}
.qbn-digest-piece h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.qbn-digest-piece p { font-size: 0.9rem; color: var(--qbn-slate); margin-bottom: 0; }

/* ═══════ STATS / METRICS ═══════ */
.qbn-metrics {
  margin-bottom: 3rem;
  text-align: center;
}

.qbn-metrics-band {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 1.2rem;
}

.qbn-metrics-unit {
  flex: 0 1 200px;
  background: var(--qbn-cloud);
  border-radius: 10px;
  padding: 1.6rem 1rem;
  box-shadow: 0 2px 10px var(--qbn-shadow);
}

.qbn-metrics-val {
  display: block;
  font-family: 'Crimson Pro', serif;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--qbn-plum);
}

.qbn-metrics-label {
  display: block;
  font-size: 0.85rem;
  color: var(--qbn-slate);
  margin-top: 0.3rem;
}

.qbn-metrics-source {
  margin-top: 1rem;
  font-size: 0.78rem;
  color: rgba(62, 44, 90, 0.55);
}

/* ═══════ HERO / GATEWAY ═══════ */
.qbn-gateway {
  margin-bottom: 3rem;
}
.qbn-gateway-left { max-width: 100%; }
.qbn-gateway-lead {
  font-size: 1.15rem;
  color: var(--qbn-slate);
  line-height: 1.8;
  margin-bottom: 1.4rem;
}

/* ═══════ TESTIMONIAL / WITNESS ═══════ */
.qbn-witness {
  border-left: 4px solid var(--qbn-mauve);
  background: var(--qbn-mist);
  padding: 1.4rem 1.6rem;
  margin: 1.8rem 0;
  border-radius: 0 8px 8px 0;
}
.qbn-witness p {
  font-size: 1rem;
  font-style: italic;
  margin-bottom: 0.5rem;
}
.qbn-witness cite {
  font-style: normal;
  font-size: 0.85rem;
  color: var(--qbn-berry);
  font-weight: 600;
}

/* ═══════ FEATURES / MERITS ═══════ */
.qbn-merits {
  margin-bottom: 3rem;
}
.qbn-merits h2 { margin-bottom: 1.2rem; }

.qbn-merits-unit {
  background: var(--qbn-cloud);
  border-radius: 8px;
  padding: 1.3rem 1.5rem;
  margin-bottom: 1rem;
  box-shadow: 0 1px 6px var(--qbn-shadow);
  display: flex;
  flex-direction: column;
}

.qbn-merits-term {
  font-family: 'Crimson Pro', serif;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--qbn-plum);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.4rem;
}
.qbn-merits-term svg { color: var(--qbn-berry); flex-shrink: 0; }

.qbn-merits-desc {
  font-size: 0.93rem;
  color: var(--qbn-slate);
  line-height: 1.7;
}

/* ═══════ SINGLE / PROSE ═══════ */
.qbn-prose {
  max-width: 780px;
  margin: 0 auto;
  padding: 2.5rem 2rem;
}
.qbn-prose-head {
  margin-bottom: 2rem;
  padding-bottom: 1.2rem;
  border-bottom: 2px solid var(--qbn-mist);
}
.qbn-prose-sub {
  font-size: 1.1rem;
  color: var(--qbn-berry);
  margin-top: 0.3rem;
}
.qbn-prose-body h2 { margin-top: 2rem; }
.qbn-prose-body h3 { margin-top: 1.5rem; }
.qbn-prose-body blockquote {
  border-left: 4px solid var(--qbn-mauve);
  background: var(--qbn-mist);
  padding: 1.2rem 1.4rem;
  margin: 1.5rem 0;
  border-radius: 0 8px 8px 0;
}
.qbn-prose-body blockquote p { font-style: italic; margin-bottom: 0.3rem; }
.qbn-prose-body blockquote cite { font-style: normal; font-size: 0.85rem; color: var(--qbn-berry); }

/* ═══════ ARCHIVE ═══════ */
.qbn-archive {
  max-width: 900px;
  margin: 0 auto;
  padding: 2.5rem 2rem;
}
.qbn-archive-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.2rem;
  margin-top: 1.4rem;
}
.qbn-archive-entry {
  background: var(--qbn-cloud);
  border-radius: 8px;
  padding: 1.3rem 1.4rem;
  box-shadow: 0 1px 6px var(--qbn-shadow);
}
.qbn-archive-entry h2 { font-size: 1.15rem; }
.qbn-archive-entry p { font-size: 0.9rem; color: var(--qbn-slate); margin-bottom: 0; }

/* ═══════ FOOTER / BASE ═══════ */
.qbn-base {
  background: var(--qbn-ink);
  color: var(--qbn-mist);
  margin-top: 3rem;
}

.qbn-base-upper {
  display: flex;
  gap: 3rem;
  padding: 3rem 2.5rem 2rem;
  max-width: 1080px;
  margin: 0 auto;
  flex-wrap: wrap;
}

.qbn-base-brand {
  flex: 0 0 260px;
}
.qbn-base-signet { display: block; margin-bottom: 0.8rem; }
.qbn-base-tagline { font-size: 0.88rem; opacity: 0.7; }

.qbn-base-cols {
  flex: 1;
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.qbn-base-col ul {
  list-style: none;
  padding: 0;
}
.qbn-base-col li { margin-bottom: 0.35rem; }
.qbn-base-col a {
  color: rgba(212, 160, 199, 0.75);
  font-size: 0.88rem;
}
.qbn-base-col a:hover { color: var(--qbn-mauve); }

.qbn-base-heading {
  display: block;
  font-family: 'Crimson Pro', serif;
  font-weight: 600;
  font-size: 1rem;
  color: var(--qbn-mauve);
  margin-bottom: 0.6rem;
  letter-spacing: 0.04em;
}

.qbn-base-lower {
  border-top: 1px solid rgba(212, 160, 199, 0.12);
  text-align: center;
  padding: 1.2rem 1rem;
  font-size: 0.8rem;
  opacity: 0.55;
}

/* ═══════ RESPONSIVE ═══════ */
@media (max-width: 768px) {
  .qbn-rail {
    position: fixed;
    bottom: 0;
    top: auto;
    left: 0;
    width: 100%;
    height: 52px;
    flex-direction: row;
    justify-content: space-around;
    padding: 0.4rem 0;
    gap: 0;
  }
  .qbn-rail-mark { padding-bottom: 0; border-bottom: none; }
  .qbn-viewport { margin-left: 0; margin-bottom: 52px; }
  .qbn-shell { padding: 1.5rem 1rem; }
  h1 { font-size: 1.7rem; }
  h2 { font-size: 1.35rem; }
  .qbn-prompt-inner { flex-direction: column; }
  .qbn-prompt-right { flex: 1 1 100%; }
  .qbn-locale-grid { font-size: 0.85rem; }
  .qbn-locale-th,
  .qbn-locale-cell { padding: 0.6rem 0.8rem; }
  .qbn-base-upper { flex-direction: column; gap: 1.5rem; padding: 2rem 1.2rem; }
}