/* About page — long-form, sticky-TOC layout in the Qumanity dark/saffron/gold theme.
   Uses the shared :root tokens from style.css. */

body.qm-about { height: auto; min-height: 100%; scroll-behavior: smooth; }
html { scroll-behavior: smooth; scroll-padding-top: 20px; }

.qm-about-header { position: sticky; top: 0; z-index: 40; background: rgba(5, 11, 20, 0.88); backdrop-filter: blur(10px); }

/* ---------- Hero ---------- */
.ab-hero {
  position: relative;
  overflow: hidden;
  padding: 72px 24px 56px;
  text-align: center;
  background:
    radial-gradient(900px 420px at 15% 0%, rgba(255, 153, 51, 0.20), transparent 60%),
    radial-gradient(800px 420px at 90% 10%, rgba(255, 215, 0, 0.12), transparent 60%),
    radial-gradient(700px 500px at 50% 120%, rgba(19, 136, 8, 0.14), transparent 60%),
    var(--qm-bg);
  border-bottom: 1px solid rgba(255, 215, 0, 0.14);
}
.ab-hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 215, 0, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 215, 0, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at 50% 30%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, #000 20%, transparent 75%);
  pointer-events: none;
}
.ab-hero-inner { position: relative; max-width: 960px; margin: 0 auto; }
.ab-eyebrow {
  display: inline-block;
  margin: 0 0 18px;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 215, 0, 0.35);
  background: rgba(255, 153, 51, 0.08);
  color: var(--qm-gold);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.ab-hero-title {
  margin: 0 0 20px;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  background: linear-gradient(90deg, var(--qm-saffron), var(--qm-gold) 55%, #fff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.ab-hero-lead {
  max-width: 780px;
  margin: 0 auto 28px;
  font-size: 1.12rem;
  line-height: 1.7;
  color: #d6e0ec;
}
.ab-hl { color: var(--qm-gold); font-weight: 600; }
.ab-hero-cta { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.ab-hero-cta .qm-btn { text-decoration: none; padding: 12px 22px; font-size: 0.95rem; }

.ab-stats {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin: 44px 0 0;
}
.ab-stats > div {
  padding: 16px 12px;
  border-radius: 14px;
  background: rgba(14, 27, 44, 0.75);
  border: 1px solid rgba(255, 215, 0, 0.16);
}
.ab-stats dt { font-size: 1.7rem; font-weight: 800; color: var(--qm-gold); line-height: 1.1; }
.ab-stats dd { margin: 6px 0 0; font-size: 0.78rem; line-height: 1.4; color: var(--qm-text-dim); }

/* ---------- Layout ---------- */
.ab-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 48px;
  max-width: 2000px;
  margin: 0 auto;
  padding: 40px var(--ab-gutter, clamp(20px, 3.2vw, 64px)) 80px;
}
.ab-toc { position: sticky; top: 124px; align-self: start; max-height: calc(100vh - 220px); overflow-y: auto; padding-right: 6px; }
.ab-toc-title { margin: 0 0 10px; font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--qm-text-dim); }
.ab-toc ol { list-style: none; margin: 0; padding: 0; border-left: 1px solid rgba(255, 255, 255, 0.10); }
.ab-toc a {
  display: block;
  padding: 7px 14px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  color: var(--qm-text-dim);
  text-decoration: none;
  font-size: 0.86rem;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.ab-toc a:hover { color: var(--qm-white); }
.ab-toc a.is-active {
  color: var(--qm-gold);
  border-left-color: var(--qm-saffron);
  background: linear-gradient(90deg, rgba(255, 153, 51, 0.12), transparent);
  font-weight: 600;
}

.ab-content { min-width: 0; }
.ab-section { padding: 8px 0 56px; margin-bottom: 8px; border-bottom: 1px solid rgba(255, 255, 255, 0.06); }
.ab-section:last-child { border-bottom: none; }
.ab-kicker { margin: 0 0 8px; font-size: 0.76rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--qm-saffron); font-weight: 700; }
.ab-section h2 { margin: 0 0 14px; font-size: clamp(1.5rem, 3vw, 2.1rem); line-height: 1.2; color: var(--qm-white); }
.ab-h3 { margin: 32px 0 10px; font-size: 1.15rem; color: var(--qm-gold); }
.ab-section p { line-height: 1.75; color: #ccd8e6; font-size: 1rem; margin: 0 0 14px; }
.ab-lead { font-size: 1.12rem !important; color: #e3ebf5 !important; }
.ab-section a:not(.qm-btn) { color: var(--qm-gold); }
.ab-section a.qm-btn-primary { color: var(--qm-navy); }
.ab-note { padding-left: 14px; border-left: 3px solid rgba(255, 153, 51, 0.6); color: var(--qm-text-dim) !important; font-size: 0.95rem !important; }

.ab-callout {
  margin: 22px 0;
  padding: 18px 22px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(255, 153, 51, 0.14), rgba(255, 215, 0, 0.05));
  border: 1px solid rgba(255, 215, 0, 0.28);
}
.ab-callout p { margin: 0 !important; }
.ab-callout-soft { background: rgba(255, 255, 255, 0.03); border-color: rgba(255, 255, 255, 0.12); }

.ab-quote {
  margin: 26px 0;
  padding: 18px 24px;
  border-left: 4px solid var(--qm-saffron);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 0 12px 12px 0;
  font-size: 1.18rem;
  line-height: 1.6;
  color: #f1e6c8;
  font-style: italic;
}
.ab-quote-sm { font-size: 0.98rem; padding: 12px 18px; margin: 16px 0 0; }

/* ---------- Cards / grids ---------- */
.ab-grid { display: grid; gap: 16px; margin: 20px 0; }
.ab-grid-2 { grid-template-columns: repeat(2, 1fr); }
.ab-grid-3 { grid-template-columns: repeat(3, 1fr); }
.ab-grid-4 { grid-template-columns: repeat(4, 1fr); }
.ab-grid-5 { grid-template-columns: repeat(5, 1fr); }
.ab-card {
  position: relative;
  padding: 20px 20px 16px;
  border-radius: 14px;
  background: var(--qm-panel-bg);
  border: 1px solid rgba(255, 215, 0, 0.14);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.ab-card:hover { transform: translateY(-3px); border-color: rgba(255, 153, 51, 0.5); box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35); }
.ab-card h3 { margin: 0 0 8px; font-size: 1.02rem; color: var(--qm-white); }
.ab-card h3 small { display: block; margin-top: 2px; font-size: 0.72rem; font-weight: 500; color: var(--qm-saffron); letter-spacing: 0.06em; }
.ab-card p { margin: 0 !important; font-size: 0.92rem !important; line-height: 1.6 !important; color: var(--qm-text-dim) !important; }
.ab-card-warn { border-color: rgba(255, 90, 90, 0.28); }
.ab-num {
  position: absolute; top: 14px; right: 16px;
  font-size: 2rem; font-weight: 800; color: rgba(255, 255, 255, 0.07);
}
.ab-ico { display: block; font-size: 1.6rem; margin-bottom: 8px; }
.ab-card-role { text-align: center; }
.ab-card-key { padding-top: 26px; }
.ab-badge {
  position: absolute; top: -11px; left: 18px;
  padding: 3px 12px; border-radius: 999px;
  background: var(--qm-saffron); color: var(--qm-navy);
  font-size: 0.72rem; font-weight: 800; letter-spacing: 0.06em; text-transform: uppercase;
}
.ab-badge-alt { background: var(--qm-gold); }

.ab-list { margin: 12px 0; padding-left: 20px; color: #ccd8e6; line-height: 1.7; font-size: 0.97rem; }
.ab-list li { margin-bottom: 6px; }
.ab-list-2 { columns: 2; column-gap: 32px; }
.ab-list-2 li { break-inside: avoid; }

/* ---------- Tables ---------- */
.ab-table-wrap { overflow-x: auto; margin: 16px 0; border-radius: 12px; border: 1px solid rgba(255, 215, 0, 0.16); }
.ab-table { width: 100%; border-collapse: collapse; font-size: 0.92rem; min-width: 520px; }
.ab-table th {
  text-align: left; padding: 11px 16px;
  background: rgba(255, 153, 51, 0.12); color: var(--qm-gold);
  font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase;
}
.ab-table td { padding: 11px 16px; border-top: 1px solid rgba(255, 255, 255, 0.07); color: #ccd8e6; vertical-align: top; line-height: 1.55; }
.ab-table tbody tr:hover { background: rgba(255, 255, 255, 0.03); }
.ab-table code, .ab-chain code, .ab-nest code {
  padding: 1px 7px; border-radius: 6px;
  background: rgba(255, 215, 0, 0.10); color: var(--qm-gold);
  font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 0.86em;
}
.ab-table-wide td:first-child { width: 22%; }

/* ---------- Triune ---------- */
.ab-triune { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 22px 0; }
.ab-tri { padding: 22px; border-radius: 16px; border: 1px solid rgba(255, 255, 255, 0.10); position: relative; overflow: hidden; }
.ab-tri::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px; }
.ab-tri h3 { margin: 10px 0 8px; font-size: 1.25rem; }
.ab-tri h3 small { font-size: 0.8rem; font-weight: 500; color: var(--qm-text-dim); margin-left: 6px; }
.ab-tri p { margin: 0 !important; font-size: 0.94rem !important; color: var(--qm-text-dim) !important; }
.ab-tri-tag { font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase; font-weight: 700; }
.ab-tri-space { background: linear-gradient(160deg, rgba(19, 136, 8, 0.18), var(--qm-panel-bg) 60%); }
.ab-tri-space::before { background: #2fbf4a; } .ab-tri-space .ab-tri-tag { color: #58d36e; }
.ab-tri-time { background: linear-gradient(160deg, rgba(255, 153, 51, 0.20), var(--qm-panel-bg) 60%); }
.ab-tri-time::before { background: var(--qm-saffron); } .ab-tri-time .ab-tri-tag { color: var(--qm-saffron); }
.ab-tri-mind { background: linear-gradient(160deg, rgba(120, 110, 255, 0.20), var(--qm-panel-bg) 60%); }
.ab-tri-mind::before { background: #8a80ff; } .ab-tri-mind .ab-tri-tag { color: #a79fff; }

/* ---------- Nested boxes ---------- */
.ab-boxes-wrap { display: grid; grid-template-columns: minmax(300px, 1fr) 1.15fr; gap: 32px; align-items: start; margin: 20px 0; }
.ab-nest { padding: 6px; }
.ab-nest-box {
  position: relative;
  padding: 30px 12px 12px;
  margin: 0;
  border-radius: 14px;
  border: 1px solid rgba(255, 215, 0, 0.35);
  background: rgba(255, 153, 51, 0.035);
}
.ab-nest-box > span {
  position: absolute; top: 7px; left: 14px;
  font-size: 0.78rem; font-weight: 700; color: var(--qm-white); letter-spacing: 0.02em;
}
.ab-nest-box .ab-nest-box { margin-top: 2px; }
.ab-nest-box[data-l="1"] { border-color: rgba(255, 190, 70, 0.42); }
.ab-nest-box[data-l="3"] { border-color: rgba(255, 215, 0, 0.45); background: rgba(255, 215, 0, 0.04); }
.ab-nest-box[data-l="5"] { border-color: rgba(120, 220, 130, 0.42); background: rgba(19, 136, 8, 0.07); }
.ab-nest-box[data-l="7"] { border-color: rgba(88, 211, 110, 0.6); background: rgba(19, 136, 8, 0.13); }
.ab-nest-core {
  padding: 10px 12px; text-align: center; margin-top: 4px;
  background: linear-gradient(90deg, var(--qm-saffron), var(--qm-gold)); border: none;
}
.ab-nest-core > span { position: static; color: var(--qm-navy); font-weight: 800; font-size: 0.86rem; }
.ab-boxes-text h3 { margin: 0 0 8px; font-size: 1.05rem; color: var(--qm-gold); }
.ab-boxes-text h3:not(:first-child) { margin-top: 24px; }
.ab-chain { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 12px 0; }
.ab-chain span { padding: 7px 12px; border-radius: 10px; background: var(--qm-panel-bg); border: 1px solid rgba(255, 215, 0, 0.16); font-size: 0.86rem; color: var(--qm-white); }
.ab-chain i { color: var(--qm-saffron); font-style: normal; }

/* ---------- ID anatomy ---------- */
.ab-id { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; margin: 14px 0; font-family: ui-monospace, "SF Mono", Menlo, monospace; }
.ab-id i { color: var(--qm-text-dim); font-style: normal; font-size: 1.2rem; }
.ab-id-part {
  position: relative;
  padding: 9px 14px; border-radius: 10px;
  background: var(--qm-panel-bg); border: 1px solid rgba(255, 215, 0, 0.3);
  color: var(--qm-gold); font-size: 1.05rem; font-weight: 700; cursor: help;
}
.ab-id-part:hover, .ab-id-part:focus { background: rgba(255, 153, 51, 0.16); }
.ab-id-part::after {
  content: attr(data-tip);
  position: absolute; bottom: calc(100% + 10px); left: 50%; transform: translateX(-50%) translateY(4px);
  width: max-content; max-width: 240px;
  padding: 8px 12px; border-radius: 8px;
  background: #000; border: 1px solid rgba(255, 215, 0, 0.35);
  color: var(--qm-white); font: 400 0.78rem/1.4 "Segoe UI", system-ui, sans-serif; white-space: normal;
  opacity: 0; pointer-events: none; transition: opacity 0.15s, transform 0.15s; z-index: 5;
}
.ab-id-part:hover::after, .ab-id-part:focus::after { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Timelines ---------- */
.ab-timelines { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 22px 0; }
.ab-tl { padding: 20px; border-radius: 16px; background: var(--qm-panel-bg); border: 1px solid rgba(255, 255, 255, 0.10); border-top: 4px solid var(--c); }
.ab-tl header { margin-bottom: 10px; }
.ab-tl h3 { margin: 6px 0 2px; font-size: 1.15rem; }
.ab-tl em { font-size: 0.76rem; color: var(--qm-text-dim); font-style: normal; }
.ab-code { display: inline-block; padding: 2px 10px; border-radius: 6px; background: var(--c); color: #0a0a0a; font-weight: 800; font-size: 0.78rem; letter-spacing: 0.06em; }
.ab-tl p { margin: 0 !important; font-size: 0.9rem !important; color: var(--qm-text-dim) !important; line-height: 1.6 !important; }
.ab-tl-y1 { --c: #a79fff; } .ab-tl-y2 { --c: #5ec8ff; } .ab-tl-y3 { --c: var(--qm-saffron); } .ab-tl-y4 { --c: #58d36e; }

.ab-elements { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 16px 0; }
.ab-el { padding: 14px 16px; border-radius: 12px; border: 1px solid var(--c); background: color-mix(in srgb, var(--c) 10%, var(--qm-panel-bg)); }
.ab-el b { display: block; color: var(--c); font-size: 0.95rem; }
.ab-el span { display: block; margin-top: 4px; font-size: 0.84rem; color: var(--qm-white); }
.ab-el small { display: block; margin-top: 2px; font-size: 0.76rem; color: var(--qm-text-dim); }
.ab-el-fire { --c: #ff6b4a; } .ab-el-earth { --c: #58d36e; } .ab-el-air { --c: #c5cdd8; } .ab-el-water { --c: #4aa8ff; }

/* ---------- Steps ---------- */
.ab-steps { list-style: none; margin: 18px 0; padding: 0; counter-reset: st; display: grid; gap: 10px; }
.ab-steps li {
  counter-increment: st; position: relative;
  padding: 14px 16px 14px 58px; border-radius: 12px;
  background: var(--qm-panel-bg); border: 1px solid rgba(255, 215, 0, 0.12);
}
.ab-steps li::before {
  content: counter(st);
  position: absolute; left: 16px; top: 50%; transform: translateY(-50%);
  width: 30px; height: 30px; border-radius: 50%;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--qm-saffron), var(--qm-gold)); color: var(--qm-navy); font-weight: 800; font-size: 0.85rem;
}
.ab-steps b { display: block; color: var(--qm-white); margin-bottom: 2px; }
.ab-steps span { color: var(--qm-text-dim); font-size: 0.92rem; line-height: 1.55; }
.ab-steps-row { grid-template-columns: repeat(4, 1fr); }
.ab-steps-row li { padding: 44px 16px 14px; }
.ab-steps-row li::before { left: 16px; top: 12px; transform: none; }

/* ---------- Services ---------- */
.ab-services .ab-card { padding-top: 18px; }

/* ---------- Status ---------- */
.ab-status { display: grid; grid-template-columns: 1.15fr 1fr; gap: 16px; margin: 22px 0; }
.ab-status-col { padding: 22px; border-radius: 16px; border: 1px solid rgba(255, 255, 255, 0.10); background: var(--qm-panel-bg); }
.ab-status-col h3 { margin: 0 0 12px; font-size: 1.1rem; display: flex; align-items: center; gap: 10px; }
.ab-status-col ul { margin: 0; padding-left: 18px; line-height: 1.65; color: #ccd8e6; font-size: 0.93rem; }
.ab-status-col li { margin-bottom: 8px; }
.ab-status-col li b { color: var(--qm-white); }
.ab-dot { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }
.ab-status-live { border-color: rgba(88, 211, 110, 0.4); background: linear-gradient(180deg, rgba(19, 136, 8, 0.14), var(--qm-panel-bg) 55%); }
.ab-status-live .ab-dot { background: #58d36e; box-shadow: 0 0 10px #58d36e; }
.ab-status-next { border-color: rgba(255, 153, 51, 0.35); }
.ab-status-next .ab-dot { background: var(--qm-saffron); box-shadow: 0 0 10px var(--qm-saffron); }

/* ---------- Roadmap ---------- */
.ab-road { list-style: none; margin: 24px 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; position: relative; }
.ab-road li { position: relative; padding: 22px 18px 18px; border-radius: 16px; background: var(--qm-panel-bg); border: 1px solid rgba(255, 255, 255, 0.10); }
.ab-road li::after { content: "→"; position: absolute; right: -14px; top: 22px; color: var(--qm-saffron); font-size: 1.2rem; z-index: 2; }
.ab-road li:last-child::after { display: none; }
.ab-road-n { font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--qm-saffron); font-weight: 800; }
.ab-road h3 { margin: 6px 0 8px; font-size: 1.1rem; }
.ab-road p { margin: 0 !important; font-size: 0.88rem !important; line-height: 1.6 !important; color: var(--qm-text-dim) !important; }
.ab-road-now { border-color: rgba(255, 215, 0, 0.5); background: linear-gradient(180deg, rgba(255, 153, 51, 0.14), var(--qm-panel-bg) 60%); }

/* ---------- Cosmos ---------- */
.ab-cosmos { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 16px 0; }
.ab-cosmos div { padding: 16px; border-radius: 12px; background: radial-gradient(circle at 20% 0%, rgba(120, 110, 255, 0.18), var(--qm-panel-bg) 70%); border: 1px solid rgba(167, 159, 255, 0.28); }
.ab-cosmos b { display: block; color: #b9b3ff; margin-bottom: 4px; }
.ab-cosmos span { font-size: 0.88rem; color: var(--qm-text-dim); line-height: 1.5; }

/* ---------- Books ---------- */
.ab-books { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 20px 0; }
.ab-book { padding: 22px; border-radius: 16px; background: linear-gradient(160deg, #142640, var(--qm-panel-bg)); border: 1px solid rgba(255, 215, 0, 0.18); }
.ab-book-new { border-color: rgba(255, 153, 51, 0.55); background: linear-gradient(160deg, rgba(255, 153, 51, 0.18), var(--qm-panel-bg) 65%); }
.ab-book-tag { display: inline-block; padding: 3px 10px; border-radius: 6px; background: rgba(255, 215, 0, 0.14); color: var(--qm-gold); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }
.ab-book h3 { margin: 10px 0 8px; font-size: 1.12rem; }
.ab-book p { margin: 0 !important; font-size: 0.9rem !important; line-height: 1.65 !important; color: var(--qm-text-dim) !important; }

/* ---------- People ---------- */
.ab-people { display: grid; grid-template-columns: 1fr 1.25fr; gap: 16px; margin: 20px 0; }
.ab-card-person { padding: 24px; }
.ab-card-person:hover { transform: none; }
.ab-card-person h3 { font-size: 1.3rem; color: var(--qm-gold); }
.ab-sub { color: var(--qm-saffron) !important; font-size: 0.84rem !important; margin-bottom: 12px !important; }
.ab-card-person .ab-list { font-size: 0.9rem; }

/* ---------- Glossary ---------- */
.ab-gloss { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 32px; margin: 16px 0; }
.ab-gloss > div { padding: 12px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.07); }
.ab-gloss dt { font-weight: 700; color: var(--qm-gold); font-size: 0.95rem; }
.ab-gloss dd { margin: 3px 0 0; color: var(--qm-text-dim); font-size: 0.9rem; line-height: 1.55; }

/* ---------- FAQ ---------- */
.ab-faq details { margin-bottom: 10px; border-radius: 12px; border: 1px solid rgba(255, 215, 0, 0.14); background: var(--qm-panel-bg); overflow: hidden; }
.ab-faq summary { cursor: pointer; padding: 15px 52px 15px 18px; font-weight: 600; color: var(--qm-white); list-style: none; position: relative; }
.ab-faq summary::-webkit-details-marker { display: none; }
.ab-faq summary::after { content: "+"; position: absolute; right: 18px; top: 50%; transform: translateY(-50%); font-size: 1.4rem; color: var(--qm-saffron); transition: transform 0.2s; }
.ab-faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.ab-faq details[open] { border-color: rgba(255, 153, 51, 0.5); }
.ab-faq details p { margin: 0 !important; padding: 0 18px 16px; color: var(--qm-text-dim) !important; font-size: 0.95rem !important; }

/* ---------- Join ---------- */
.ab-join { text-align: center; padding: 36px 24px 12px; border-radius: 20px; background: radial-gradient(600px 260px at 50% 0%, rgba(255, 153, 51, 0.16), transparent 70%); }
.ab-join h2 { max-width: 760px; margin-left: auto; margin-right: auto; }
.ab-join .ab-lead { max-width: 720px; margin-left: auto; margin-right: auto; }
.ab-join .ab-grid { text-align: left; }
.ab-join-cta { margin: 28px 0 8px; }
.ab-contact { color: var(--qm-text-dim) !important; font-size: 0.95rem !important; }
.ab-contact b { color: var(--qm-gold); font-weight: 600; }
.ab-vasu { margin-top: 16px !important; font-size: 1.15rem !important; color: var(--qm-gold) !important; letter-spacing: 0.04em; }

/* ---------- Back to top ---------- */
.ab-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 50;
  width: 44px; height: 44px; border-radius: 50%; border: 1px solid rgba(255, 215, 0, 0.4);
  background: var(--qm-panel-bg); color: var(--qm-gold); font-size: 1.2rem; cursor: pointer;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.5);
}
.ab-top:hover { background: var(--qm-saffron); color: var(--qm-navy); }
.ab-top[hidden] { display: none; }

/* ---------- Reveal on scroll ---------- */
.ab-reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.ab-reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .ab-reveal { opacity: 1; transform: none; transition: none; }
  .ab-card, .ab-card:hover { transition: none; transform: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .ab-layout { grid-template-columns: minmax(0, 1fr); gap: 0; padding-top: 16px; }
  .ab-layout > * { min-width: 0; }
  .ab-toc {
    position: sticky; top: 92px; z-index: 30; max-height: none; overflow: visible;
    margin: 0 -24px 20px; padding: 8px 24px; max-width: 100vw; background: rgba(5, 11, 20, 0.92); backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(255, 215, 0, 0.12);
  }
  .ab-toc-title { display: none; }
  .ab-toc ol { display: flex; gap: 4px; overflow-x: auto; border-left: none; padding-bottom: 4px; scrollbar-width: none; }
  .ab-toc ol::-webkit-scrollbar { display: none; }
  .ab-toc a { white-space: nowrap; border-left: none; border-bottom: 2px solid transparent; padding: 8px 10px; margin: 0; }
  .ab-toc a.is-active { border-bottom-color: var(--qm-saffron); background: none; }
  .ab-grid-5 { grid-template-columns: repeat(3, 1fr); }
  .ab-grid-4, .ab-timelines, .ab-road, .ab-steps-row { grid-template-columns: repeat(2, 1fr); }
  .ab-road li::after { display: none; }
  .ab-stats { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 760px) {
  .ab-hero { padding: 48px 18px 40px; }
  .ab-layout { padding: 12px 16px 60px; }
  .ab-toc { margin: 0 -16px 16px; padding: 6px 16px; }
  .ab-grid-2, .ab-grid-3, .ab-grid-4, .ab-grid-5, .ab-triune, .ab-timelines, .ab-status, .ab-road,
  .ab-books, .ab-people, .ab-cosmos, .ab-elements, .ab-steps-row, .ab-gloss, .ab-boxes-wrap { grid-template-columns: 1fr; }
  .ab-list-2 { columns: 1; }
  .ab-stats { grid-template-columns: repeat(2, 1fr); }
  .qm-about-header { position: static; }
  .qm-about-header .qm-header-actions { display: none; }
  .ab-toc { top: 0; }
}