/* ============================================================
   ABOUT — "The Engineer Behind the System"
   VELLUM-led, more human/editorial. Uses the frozen system
   (tokens.css + main.css). No new colors / no new metaphors.
   ============================================================ */

/* shared imagery-pattern base (documented in DESIGN_SYSTEM.md §8.1) */
.ximg { overflow: hidden; }
.xphoto { position: absolute; inset: 0; z-index: 0; width: 100%; height: 100%; object-fit: cover; pointer-events: none; will-change: transform; }
.xwash, .xscrim { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.xanno { position: absolute; inset: 0; z-index: 1; pointer-events: none; }
.ximg > .container { position: relative; z-index: 2; }

/* honest placeholder tag */
.ph-tag { font-family: var(--f-mono); font-size: 0.64rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--red); border: 1px solid color-mix(in srgb, var(--red) 55%, transparent); border-radius: 2px; padding: 2px 6px; display: inline-block; }

/* ---------- 01 · HERO (vellum, human editorial statement) ---------- */
.about-hero { min-height: 80svh; display: flex; align-items: center; padding-top: 132px; padding-bottom: var(--sec-pad); }
.about-hero .eyebrow { color: var(--red); margin-bottom: var(--s6); }
.about-hero h1 { font-size: clamp(2.8rem, 7.2vw, 6rem); font-weight: 600; letter-spacing: -0.04em; line-height: 0.96; max-width: 16ch; color: var(--vl-ink); }
.about-hero h1 .accent { color: var(--red-deep); }
.about-hero .lead { margin-top: var(--s7); display: grid; grid-template-columns: 1fr 1fr; gap: var(--s8); max-width: 72ch; }
.about-hero .lead p { font-size: 1.14rem; line-height: 1.6; color: var(--vl-ink); }
/* the second beat carries the most important human line — keep it an equal, not a dimmed aside */
.about-hero .lead p.soft { color: var(--vl-ink); }

/* ---------- 02 · THE ENGINEER BEHIND THE SYSTEM (blueprint, signature reveal) ---------- */
.ebs-flow { margin: var(--s8) 0 var(--s9); }
.ebs-flow svg { width: 100%; height: auto; display: block; }
.ebs { display: grid; grid-template-columns: 360px 1fr; gap: var(--s9); align-items: center; }
.portrait-ph { position: relative; aspect-ratio: 4 / 5; border: 1px solid var(--bp-line); background: color-mix(in srgb, var(--bp-surface) 60%, transparent); display: grid; place-items: center; overflow: hidden; }
.portrait-ph::before, .portrait-ph::after { content: ""; position: absolute; width: 14px; height: 14px; border: 1px solid var(--red); }
.portrait-ph::before { top: 10px; left: 10px; border-right: 0; border-bottom: 0; }
.portrait-ph::after { bottom: 10px; right: 10px; border-left: 0; border-top: 0; }
.portrait-ph .sil { width: 46%; color: var(--bp-line); opacity: 0.9; }
.portrait-ph .plabel { position: absolute; bottom: 0; left: 0; right: 0; text-align: center; font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--bp-draft); padding: var(--s3); border-top: 1px solid var(--bp-line-soft); background: color-mix(in srgb, var(--bp-void) 55%, transparent); }
.ebs .idn h2 { font-size: var(--fs-h2); color: var(--bp-ink); }
.ebs .idn .role { margin-top: var(--s5); font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--bp-draft); }
.ebs .idn p { margin-top: var(--s5); font-size: 1.08rem; color: color-mix(in srgb, var(--bp-ink) 84%, transparent); max-width: 54ch; }
.ebs .idn p + p { margin-top: var(--s4); color: color-mix(in srgb, var(--bp-ink) 72%, transparent); }

/* ---------- 03 · ENGINEERING PHILOSOPHY (vellum, principles — expandable, not cards) ---------- */
.principles { border-top: 1px solid var(--vl-line); }
.principle { border-bottom: 1px solid var(--vl-line); }
.principle-head { display: grid; grid-template-columns: 64px 1fr auto; gap: var(--s5); align-items: baseline; width: 100%; text-align: left; padding: var(--s6) 0; cursor: pointer; transition: padding-left var(--t-base) var(--e-out); }
.principle:hover .principle-head { padding-left: var(--s3); }
.principle-head .pn { font-family: var(--f-mono); font-size: var(--fs-mono); color: var(--red); }
.principle-head .nm { font-family: var(--f-display); font-weight: 600; font-size: clamp(1.6rem, 3vw, 2.6rem); letter-spacing: -0.02em; color: var(--vl-ink); }
.principle-head .oneline { grid-column: 2; font-size: 1rem; color: var(--vl-ink-soft); margin-top: var(--s2); }
.principle-head .plus { width: 24px; height: 24px; position: relative; align-self: center; }
.principle-head .plus::before, .principle-head .plus::after { content: ""; position: absolute; background: var(--vl-ink); transition: transform var(--t-base) var(--e-out); }
.principle-head .plus::before { top: 50%; left: 0; width: 100%; height: 1.5px; transform: translateY(-50%); }
.principle-head .plus::after { left: 50%; top: 0; width: 1.5px; height: 100%; transform: translateX(-50%); }
.principle.open .plus::after { transform: translateX(-50%) scaleY(0); }
.principle-body { max-height: 0; overflow: hidden; transition: max-height var(--t-slow) var(--e-inout); }
.principle.open .principle-body { max-height: 200px; }
.principle-body .inner { padding: 0 0 var(--s6) 64px; max-width: 64ch; color: var(--vl-ink); }

/* ---------- 04 · WHAT I TAKE RESPONSIBILITY FOR (blueprint, trust ledger) ---------- */
.ledger { border-top: 1px solid var(--bp-line-soft); }
.ledger-row { display: grid; grid-template-columns: 56px 220px 1fr auto; gap: var(--s5); align-items: center; padding: var(--s5) 0; border-bottom: 1px solid var(--bp-line-soft); transition: background var(--t-base); }
.ledger-row:hover { background: color-mix(in srgb, var(--bp-surface) 50%, transparent); }
.ledger-row .lx { font-family: var(--f-mono); font-size: var(--fs-mono); color: var(--bp-draft); opacity: 0.7; }
.ledger-row .ld { font-family: var(--f-display); font-weight: 600; font-size: 1.25rem; letter-spacing: -0.01em; color: var(--bp-ink); }
.ledger-row .lr { color: color-mix(in srgb, var(--bp-ink) 78%, transparent); font-size: 0.98rem; }
.ledger-row .ls { justify-self: end; width: 9px; height: 9px; border-radius: 50%; background: var(--cyan-live); box-shadow: 0 0 12px color-mix(in srgb, var(--cyan-live) 80%, transparent); opacity: 1; }
.ledger-foot { margin-top: var(--s6); font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--bp-draft); display: flex; gap: var(--s4); align-items: center; }
.ledger-foot .ln { flex: 1; height: 1px; background: var(--bp-line-soft); }

/* ---------- 05 · HOW I WORK (vellum, working values) ---------- */
.values { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 var(--s9); }
.value { display: grid; grid-template-columns: 40px 1fr; gap: var(--s4); padding: var(--s6) 0; border-top: 1px solid var(--vl-line); align-items: start; }
.value .vn { font-family: var(--f-mono); font-size: var(--fs-mono); color: var(--red); padding-top: 0.35em; }
.value h4 { font-family: var(--f-display); font-weight: 600; font-size: 1.3rem; letter-spacing: -0.015em; color: var(--vl-ink); }
.value p { margin-top: var(--s3); font-size: 0.98rem; color: var(--vl-ink-soft); max-width: 40ch; }

/* ---------- 06 · EXPERIENCE (blueprint, engineering record — placeholders) ---------- */
.record { border-top: 1px solid var(--bp-line-soft); }
.rec-row { display: grid; grid-template-columns: 120px 1fr 1fr 1.2fr; gap: var(--s5); padding: var(--s6) 0; border-bottom: 1px solid var(--bp-line-soft); align-items: baseline; }
.rec-row .rk { font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--bp-draft); }
.rec-row .rv { color: var(--bp-ink); font-size: 1rem; }
.rec-row .rv.dim { color: var(--bp-draft); }
.rec-head { display: grid; grid-template-columns: 120px 1fr 1fr 1.2fr; gap: var(--s5); padding-bottom: var(--s3); font-family: var(--f-mono); font-size: 0.66rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--bp-draft); opacity: 0.7; }

/* ---------- 07 · CLOSING (carbon cinematic) ---------- */
#about-cta.cta .cta-photo { opacity: 0.5; -webkit-mask-image: radial-gradient(ellipse 96% 105% at 50% 45%, #000, transparent 88%); mask-image: radial-gradient(ellipse 96% 105% at 50% 45%, #000, transparent 88%); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .ebs { grid-template-columns: 300px 1fr; gap: var(--s7); }
  .values { grid-template-columns: 1fr; gap: 0; }
}
@media (max-width: 900px) {
  .about-hero { min-height: auto; padding-top: 116px; }
  .about-hero .lead { grid-template-columns: 1fr; gap: var(--s5); }
}
@media (max-width: 760px) {
  .ebs { grid-template-columns: 1fr; gap: var(--s7); }
  .portrait-ph { max-width: 280px; }
  .principle-head { grid-template-columns: 44px 1fr auto; }
  .principle-body .inner { padding-left: 0; }
  .ledger-row { grid-template-columns: 44px 1fr auto; gap: var(--s3) var(--s4); }
  .ledger-row .lr { grid-column: 2; }
  .ledger-row .ls { grid-column: 3; grid-row: 1; }
  .rec-head { display: none; }
  .rec-row { grid-template-columns: 1fr; gap: var(--s2); padding: var(--s5) 0; }
  .rec-row .rk { color: var(--red); }
  .rev-seam .mono { display: none; }
  #about-cta.cta .cta-photo { opacity: 0.38; }
}