/* About — a personal, scroll-directed chapter inside the Signal Cinema system. */

body.editorial-about {
  --about-paper: #f2f1ec;
  --about-ink: #111411;
  --about-muted: #666b64;
  --about-line: rgba(17, 20, 17, 0.16);
  --about-green: #17684f;
  --about-yellow: #f5d526;
  --about-progress: 0;
  background: var(--about-paper);
  color: var(--about-ink);
  font-family: "Mozilla Headline", Arial, sans-serif;
}

body.editorial-about main { overflow: clip; }

body.editorial-about .editorial-header nav a[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.ab-hero,
.ab-principle,
.ab-toolkit,
.ab-practice,
.ab-ledger,
.ab-frequency {
  position: relative;
  width: 100%;
  border-bottom: 1px solid var(--about-line);
}

.ab-hero {
  min-height: max(820px, 100svh);
  padding: 104px max(4vw, 48px) 42px;
  display: flex;
  flex-direction: column;
  background:
    linear-gradient(rgba(17, 20, 17, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 20, 17, 0.035) 1px, transparent 1px),
    radial-gradient(circle at 73% 44%, rgba(245, 213, 38, 0.18), transparent 29%);
  background-size: 60px 60px, 60px 60px, auto;
}

.ab-meta {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  min-height: 66px;
  padding: 0 20px;
  border: 1px solid rgba(23, 104, 79, 0.24);
  background: rgba(23, 104, 79, 0.08);
  color: #164f3f;
  font-size: 0.68rem;
  font-stretch: 82%;
  font-weight: 620;
  letter-spacing: 0.09em;
}

.ab-meta span:last-child { text-align: right; }

.ab-hero-grid {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.22fr) minmax(360px, 0.78fr);
  align-items: center;
  gap: clamp(48px, 7vw, 140px);
  padding: clamp(48px, 6vh, 86px) 0 58px;
}

.ab-hero-copy { position: relative; z-index: 2; }

.ab-kicker,
.ab-skills-heading > span,
.ab-toolkit-heading > span,
.ab-practice-intro > span,
.ab-ledger-heading > span,
.ab-frequency-copy > span,
.ab-principle-number {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--about-green);
  font-size: 0.7rem;
  font-stretch: 78%;
  font-weight: 640;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.ab-kicker span {
  width: 32px;
  height: 2px;
  background: var(--about-green);
}

.ab-hero h1 {
  margin: 24px 0 0;
  max-width: 1050px;
  font-size: clamp(5rem, 8.25vw, 10rem);
  font-stretch: 112%;
  font-weight: 360;
  letter-spacing: -0.065em;
  line-height: 0.78;
}

.ab-title-line {
  display: block;
  overflow: hidden;
  padding: 0.1em 0 0.08em;
}

.ab-title-line > span {
  display: block;
  transform: translateY(calc((1 - var(--about-progress)) * 112%));
  transition: transform 900ms cubic-bezier(0.22, 1, 0.36, 1);
}

.ab-title-line:nth-child(2) > span { transition-delay: 90ms; }
.ab-title-accent { color: var(--about-green); }

.ab-intro {
  display: grid;
  grid-template-columns: minmax(280px, 520px) auto;
  align-items: end;
  gap: clamp(28px, 5vw, 76px);
  margin-top: clamp(36px, 5vh, 64px);
}

.ab-intro p {
  margin: 0;
  color: #3f443e;
  font-size: clamp(1.15rem, 1.5vw, 1.65rem);
  font-stretch: 92%;
  line-height: 1.45;
}

.ab-scroll-link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 15px 0;
  border-bottom: 1px solid currentColor;
  color: var(--about-ink);
  font-size: 0.78rem;
  font-stretch: 84%;
  font-weight: 620;
  letter-spacing: 0.03em;
  text-decoration: none;
  white-space: nowrap;
}

.ab-scroll-link span { transition: transform 220ms ease; }
.ab-scroll-link:hover span,
.ab-scroll-link:focus-visible span { transform: translateY(5px); }

.ab-portrait-card {
  position: relative;
  z-index: 1;
  width: min(100%, 520px);
  margin: 0 auto;
  transform: perspective(900px) rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg));
  transform-style: preserve-3d;
  transition: transform 280ms cubic-bezier(0.22, 1, 0.36, 1);
}

.ab-portrait-window {
  position: relative;
  aspect-ratio: 4 / 4.65;
  overflow: hidden;
  border: 1px solid rgba(17, 20, 17, 0.42);
  background: var(--about-yellow);
  box-shadow: 22px 24px 0 rgba(23, 104, 79, 0.13);
}

.ab-portrait-window::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background:
    repeating-linear-gradient(0deg, transparent 0 5px, rgba(17, 20, 17, 0.055) 5px 6px),
    linear-gradient(145deg, transparent 55%, rgba(23, 104, 79, 0.15));
  mix-blend-mode: multiply;
}

.ab-portrait-window img {
  position: absolute;
  inset: auto 0 0;
  width: 100%;
  height: auto;
  transform: scale(1.045) translateY(1.2%);
  transform-origin: bottom;
  filter: saturate(0.9) contrast(1.04);
}

.ab-portrait-stamp {
  position: absolute;
  z-index: 3;
  top: 20px;
  right: 20px;
  display: grid;
  place-items: center;
  width: 64px;
  aspect-ratio: 1;
  border: 1px solid var(--about-ink);
  border-radius: 50%;
  color: var(--about-ink);
  font-size: 0.66rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  transform: rotate(8deg);
}

.ab-portrait-card figcaption {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 32px;
  padding: 22px 0 0 22px;
}

.ab-portrait-card figcaption span {
  color: var(--about-green);
  font-size: 0.62rem;
  font-weight: 640;
  letter-spacing: 0.1em;
}

.ab-portrait-card figcaption p {
  max-width: 280px;
  margin: 0;
  color: var(--about-muted);
  font-size: 0.82rem;
  line-height: 1.35;
}

.ab-hero-foot {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 18px;
  color: #6e736c;
  font-size: 0.58rem;
  font-stretch: 80%;
  letter-spacing: 0.12em;
}

.ab-hero-foot i { height: 1px; background: var(--about-line); }

.ab-principle {
  padding: clamp(100px, 13vw, 210px) max(4vw, 48px);
  background: var(--about-ink);
  color: var(--about-paper);
}

.ab-principle-number { color: #9a9f97; }

.ab-principle-copy {
  display: grid;
  grid-template-columns: minmax(180px, 0.35fr) minmax(0, 1.65fr);
  gap: clamp(50px, 9vw, 170px);
  margin-top: 74px;
}

.ab-principle-copy > p {
  max-width: 270px;
  margin: 8px 0 0;
  color: #aeb3ab;
  font-size: 0.98rem;
  line-height: 1.5;
}

.ab-principle-copy h2 {
  max-width: 1230px;
  margin: 0;
  font-size: clamp(3.4rem, 6.9vw, 8.6rem);
  font-stretch: 106%;
  font-weight: 330;
  letter-spacing: -0.052em;
  line-height: 0.92;
}

.ab-principle-copy h2 em {
  color: var(--about-yellow);
  font-style: normal;
  font-stretch: 120%;
}

.ab-proof-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: clamp(90px, 13vw, 190px);
  border-top: 1px solid rgba(242, 241, 236, 0.2);
}

.ab-proof-strip article {
  display: flex;
  min-height: 170px;
  flex-direction: column;
  justify-content: space-between;
  padding: 28px;
  border-right: 1px solid rgba(242, 241, 236, 0.2);
}

.ab-proof-strip article:first-child { border-left: 1px solid rgba(242, 241, 236, 0.2); }
.ab-proof-strip strong { color: var(--about-yellow); font-size: clamp(2.8rem, 4.5vw, 5.5rem); font-weight: 380; letter-spacing: -0.05em; }
.ab-proof-strip span { max-width: 150px; color: #b6bbb3; font-size: 0.75rem; line-height: 1.35; text-transform: uppercase; }

.ab-skills {
  position: relative;
  min-height: 240svh;
  border-bottom: 1px solid var(--about-line);
  background:
    radial-gradient(circle at 50% 50%, rgba(245, 213, 38, 0.24), transparent 25%),
    var(--about-paper);
}

.ab-skills-stage {
  position: sticky;
  top: 0;
  height: 100svh;
  min-height: 760px;
  overflow: hidden;
}

.ab-skills-heading {
  position: absolute;
  z-index: 12;
  top: clamp(110px, 13vh, 150px);
  left: max(4vw, 48px);
  max-width: 440px;
}

.ab-skills-heading h2,
.ab-practice-intro h2,
.ab-ledger-heading h2,
.ab-frequency-copy h2 {
  margin: 22px 0 0;
  font-size: clamp(3.6rem, 6vw, 7.4rem);
  font-stretch: 112%;
  font-weight: 340;
  letter-spacing: -0.055em;
  line-height: 0.86;
}

.ab-skills-heading p {
  max-width: 270px;
  margin: 28px 0 0;
  color: var(--about-muted);
  font-size: 0.84rem;
  line-height: 1.5;
}

.ab-skill-field { position: absolute; inset: 0; }

.ab-skill-core {
  position: absolute;
  z-index: 3;
  top: 52%;
  left: 64%;
  display: grid;
  place-content: center;
  width: clamp(170px, 13vw, 250px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--about-green);
  color: #f8f4dc;
  text-align: center;
  opacity: calc(0.18 + var(--skill-progress, 0) * 0.82);
  transform: translate(-50%, -50%) scale(calc(0.7 + var(--skill-progress, 0) * 0.3));
  transition: opacity 100ms linear;
}

.ab-skill-core span { font-size: 0.55rem; letter-spacing: 0.12em; }
.ab-skill-core strong { margin-top: 8px; font-size: 1.15rem; font-stretch: 88%; font-weight: 540; line-height: 1; }

.ab-skill-card {
  position: absolute;
  z-index: 4;
  top: 52%;
  left: 64%;
  width: clamp(220px, 15vw, 290px);
  min-height: 172px;
  padding: 22px;
  border: 1px solid rgba(17, 20, 17, 0.35);
  background: rgba(248, 247, 241, 0.94);
  box-shadow: 0 18px 55px rgba(17, 20, 17, 0.08);
  transform: translate(-50%, -50%);
  will-change: transform, opacity;
  transition: background-color 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.ab-skill-card:hover,
.ab-skill-card:focus-visible {
  z-index: 20;
  outline: none;
  border-color: var(--about-green);
  background: var(--about-yellow);
  box-shadow: 0 28px 70px rgba(17, 20, 17, 0.17);
}

.ab-skill-card img {
  width: 30px;
  height: 30px;
  margin-bottom: 24px;
}

.ab-skill-card > span { color: var(--about-green); font-size: 0.56rem; font-weight: 650; letter-spacing: 0.1em; }
.ab-skill-card h3 { margin: 9px 0 8px; font-size: 1.28rem; font-stretch: 92%; font-weight: 560; letter-spacing: -0.025em; }
.ab-skill-card p { margin: 0; color: #515650; font-size: 0.72rem; line-height: 1.42; }

.ab-toolkit {
  padding: clamp(110px, 12vw, 190px) max(4vw, 48px);
  background: var(--about-green);
  color: var(--about-paper);
}

.ab-toolkit-heading {
  display: grid;
  grid-template-columns: 0.36fr 1.02fr 0.52fr;
  align-items: end;
  gap: clamp(36px, 6vw, 100px);
}

.ab-toolkit-heading > span { color: #b8d6ca; }
.ab-toolkit-heading h2 {
  margin: 0;
  font-size: clamp(3.6rem, 6vw, 7.4rem);
  font-stretch: 112%;
  font-weight: 340;
  letter-spacing: -0.055em;
  line-height: 0.86;
}
.ab-toolkit-heading > p {
  max-width: 380px;
  margin: 0 0 5px;
  color: #c9d9d2;
  font-size: 0.94rem;
  line-height: 1.55;
}

.ab-toolkit-console {
  min-height: 620px;
  display: grid;
  grid-template-columns: minmax(220px, 0.28fr) minmax(0, 1fr);
  margin-top: clamp(76px, 10vw, 140px);
  border: 1px solid rgba(242, 241, 236, 0.34);
  background: var(--about-ink);
  box-shadow: 28px 30px 0 rgba(245, 213, 38, 0.13);
}

.ab-tool-tabs {
  display: flex;
  flex-direction: column;
  border-right: 1px solid rgba(242, 241, 236, 0.2);
}

.ab-tool-tabs button {
  min-height: 132px;
  display: grid;
  grid-template-columns: 38px 1fr;
  grid-template-rows: auto auto;
  align-content: center;
  padding: 26px;
  border: 0;
  border-bottom: 1px solid rgba(242, 241, 236, 0.2);
  background: transparent;
  color: #bcc1ba;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background-color 220ms ease, color 220ms ease, padding-left 220ms ease;
}

.ab-tool-tabs button:last-child { border-bottom: 0; }
.ab-tool-tabs button:hover,
.ab-tool-tabs button:focus-visible { color: #fff; padding-left: 31px; outline: none; }
.ab-tool-tabs button:focus-visible { box-shadow: inset 0 0 0 2px var(--about-yellow); }
.ab-tool-tabs button[aria-selected="true"] { background: var(--about-yellow); color: var(--about-ink); }
.ab-tool-tabs button > span { grid-row: 1 / span 2; color: currentColor; font-size: 0.61rem; font-weight: 650; letter-spacing: 0.08em; }
.ab-tool-tabs button > strong { font-size: 1.08rem; font-stretch: 96%; font-weight: 560; }
.ab-tool-tabs button > small { margin-top: 5px; font-size: 0.62rem; font-weight: 420; letter-spacing: 0.035em; opacity: 0.68; }

.ab-tool-panels { min-width: 0; }
.ab-tool-panel { padding: clamp(38px, 5vw, 76px); animation: ab-tool-in 420ms cubic-bezier(0.22, 1, 0.36, 1) both; }
.ab-tool-panel[hidden] { display: none; }
.ab-tool-panel > header { display: flex; justify-content: space-between; gap: 40px; padding-bottom: 34px; border-bottom: 1px solid rgba(242, 241, 236, 0.2); }
.ab-tool-panel > header span { color: var(--about-yellow); font-size: 0.62rem; font-weight: 650; letter-spacing: 0.11em; }
.ab-tool-panel > header p { max-width: 370px; margin: 0; color: #adb2ab; font-size: 0.78rem; line-height: 1.45; text-align: right; }

.ab-tool-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin-top: 38px; }
.ab-tool-card {
  min-height: 340px;
  display: flex;
  flex-direction: column;
  padding: clamp(26px, 3vw, 42px);
  border: 1px solid rgba(17, 20, 17, 0.16);
  background: var(--about-paper);
  color: var(--about-ink);
  transform: perspective(900px) rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg));
  transform-style: preserve-3d;
  transition: transform 240ms ease, background-color 240ms ease;
}
.ab-tool-card:hover { background: #fffbe6; }
.ab-tool-card > img,
.ab-tool-icon-stack { width: 44px; height: 44px; margin-bottom: auto; }
.ab-tool-card > img { object-fit: contain; object-position: left center; }
.ab-tool-icon-stack { display: flex; width: auto; gap: 8px; }
.ab-tool-icon-stack img { width: 34px; height: 34px; object-fit: contain; }
.ab-tool-card div > span { color: var(--about-green); font-size: 0.56rem; font-weight: 650; letter-spacing: 0.1em; }
.ab-tool-card h3 { margin: 10px 0 0; font-size: clamp(1.8rem, 2.6vw, 3.2rem); font-stretch: 105%; font-weight: 420; letter-spacing: -0.045em; }
.ab-tool-card > p { max-width: 440px; margin: 26px 0 0; color: #535851; font-size: 0.78rem; line-height: 1.5; }

@keyframes ab-tool-in {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

.ab-practice {
  padding: clamp(110px, 13vw, 210px) max(4vw, 48px);
}

.ab-practice-intro {
  display: grid;
  grid-template-columns: 0.45fr 1.15fr 0.55fr;
  align-items: end;
  gap: clamp(38px, 6vw, 110px);
}

.ab-practice-intro h2 { max-width: 930px; }
.ab-practice-intro p { max-width: 340px; margin: 0 0 6px; color: var(--about-muted); font-size: 0.96rem; line-height: 1.55; }

.ab-practice-list { margin: clamp(100px, 12vw, 170px) 0 0; padding: 0; list-style: none; }
.ab-practice-list li {
  display: grid;
  grid-template-columns: 0.26fr 1.34fr 0.4fr;
  align-items: start;
  gap: 40px;
  padding: 42px 0;
  border-top: 1px solid var(--about-line);
}
.ab-practice-list li:last-child { border-bottom: 1px solid var(--about-line); }
.ab-practice-list > li > span { color: var(--about-green); font-size: 0.8rem; font-weight: 650; }
.ab-practice-list small { color: var(--about-muted); font-size: 0.58rem; letter-spacing: 0.1em; }
.ab-practice-list h3 { margin: 12px 0; font-size: clamp(2rem, 3.25vw, 4.1rem); font-stretch: 105%; font-weight: 380; letter-spacing: -0.045em; }
.ab-practice-list p { max-width: 720px; margin: 0; color: var(--about-muted); font-size: 0.9rem; line-height: 1.5; }
.ab-practice-list i { justify-self: end; padding: 9px 15px; border: 1px solid var(--about-green); border-radius: 99px; color: var(--about-green); font-size: 0.58rem; font-style: normal; letter-spacing: 0.1em; }

.ab-ledger {
  padding: clamp(110px, 13vw, 210px) max(4vw, 48px);
  background: #e4e7df;
}

.ab-ledger-heading { display: grid; grid-template-columns: 0.45fr 1.55fr; gap: 60px; align-items: start; }
.ab-ledger-heading h2 { max-width: 940px; margin-top: 0; }
.ab-ledger-grid { margin-top: clamp(90px, 12vw, 170px); border-top: 1px solid rgba(17, 20, 17, 0.28); }
.ab-ledger-item {
  display: grid;
  grid-template-columns: 0.32fr 0.82fr 0.86fr;
  gap: clamp(30px, 5vw, 90px);
  align-items: start;
  padding: 42px 0;
  border-bottom: 1px solid rgba(17, 20, 17, 0.28);
}
.ab-ledger-item time { color: var(--about-green); font-size: 0.72rem; font-weight: 650; letter-spacing: 0.08em; }
.ab-ledger-item div > span { color: #72786f; font-size: 0.56rem; letter-spacing: 0.1em; }
.ab-ledger-item h3 { margin: 10px 0 5px; font-size: clamp(1.45rem, 2.1vw, 2.6rem); font-stretch: 102%; font-weight: 430; letter-spacing: -0.035em; }
.ab-ledger-item div p { margin: 0; color: #5b6159; font-size: 0.78rem; }
.ab-ledger-item > p { max-width: 570px; margin: 0; color: #4d524c; font-size: 0.9rem; line-height: 1.55; }

.ab-frequency {
  min-height: 92svh;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  align-items: center;
  gap: 90px;
  padding: 120px max(4vw, 48px);
  background: var(--about-yellow);
}

.ab-frequency-copy { position: relative; z-index: 2; }
.ab-frequency-copy > span { color: #33382f; }
.ab-frequency-copy h2 { max-width: 820px; }
.ab-frequency-copy > p { max-width: 620px; margin: 38px 0 0; color: #353a34; font-size: clamp(1rem, 1.35vw, 1.4rem); line-height: 1.5; }
.ab-sound-prompt { margin-top: 42px; padding: 14px 0; border: 0; border-bottom: 1px solid currentColor; background: transparent; color: var(--about-ink); font: inherit; font-size: 0.78rem; font-weight: 620; cursor: pointer; }
.ab-sound-prompt span { display: inline-block; margin-left: 18px; transition: transform 220ms ease; }
.ab-sound-prompt:hover span,
.ab-sound-prompt:focus-visible span { transform: translate(4px, -4px); }

.ab-frequency-visual {
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(8px, 1vw, 18px);
  overflow: hidden;
}

.ab-frequency-visual span {
  width: clamp(10px, 1vw, 18px);
  height: calc(38px + var(--frequency, 0) * var(--bar, 1) * 330px);
  border-radius: 99px;
  background: var(--about-ink);
  transform: scaleY(calc(0.36 + var(--frequency, 0) * 0.64));
  transform-origin: center;
  transition: height 90ms linear, transform 90ms linear;
}
.ab-frequency-visual span:nth-child(1), .ab-frequency-visual span:nth-child(9) { --bar: 0.35; }
.ab-frequency-visual span:nth-child(2), .ab-frequency-visual span:nth-child(8) { --bar: 0.55; }
.ab-frequency-visual span:nth-child(3), .ab-frequency-visual span:nth-child(7) { --bar: 0.78; }
.ab-frequency-visual span:nth-child(4), .ab-frequency-visual span:nth-child(6) { --bar: 0.94; }
.ab-frequency-visual span:nth-child(5) { --bar: 1; }

.ab-contact { border-bottom: 0; }

@media (max-width: 1240px) {
  .ab-hero h1 { font-size: clamp(5rem, 9vw, 8.2rem); }
  .ab-practice-intro { grid-template-columns: 0.35fr 1fr; }
  .ab-practice-intro > p { grid-column: 2; }
  .ab-skill-card { width: 230px; }
  .ab-toolkit-heading { grid-template-columns: 0.35fr 1fr; }
  .ab-toolkit-heading > p { grid-column: 2; }
}

@media (max-width: 980px) {
  .ab-hero { min-height: auto; padding-inline: 28px; }
  .ab-meta { grid-template-columns: 1fr auto; }
  .ab-meta span:nth-child(2) { display: none; }
  .ab-hero-grid { grid-template-columns: 1fr; padding-top: 64px; }
  .ab-hero-copy { padding-right: 10vw; }
  .ab-portrait-card { width: min(78vw, 500px); margin-top: 22px; margin-right: 0; }
  .ab-principle-copy { grid-template-columns: 1fr; gap: 44px; }
  .ab-proof-strip { grid-template-columns: repeat(2, 1fr); }
  .ab-proof-strip article:nth-child(3) { border-left: 1px solid rgba(242, 241, 236, 0.2); }
  .ab-skills { min-height: auto; padding: 110px 28px; }
  .ab-skills-stage { position: relative; top: auto; height: auto; min-height: 0; overflow: visible; }
  .ab-skills-heading { position: relative; top: auto; left: auto; max-width: 650px; }
  .ab-skill-core { display: none; }
  .ab-skill-field { position: relative; display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 70px; }
  .ab-skill-card { position: relative; inset: auto; width: auto; min-height: 210px; transform: none !important; opacity: 1 !important; }
  .ab-toolkit { padding-inline: 28px; }
  .ab-toolkit-heading { grid-template-columns: 1fr; }
  .ab-toolkit-heading > p { grid-column: auto; }
  .ab-toolkit-console { grid-template-columns: 1fr; min-height: 0; }
  .ab-tool-tabs { display: grid; grid-template-columns: repeat(4, minmax(150px, 1fr)); overflow-x: auto; border-right: 0; border-bottom: 1px solid rgba(242, 241, 236, 0.2); }
  .ab-tool-tabs button { min-height: 116px; border-right: 1px solid rgba(242, 241, 236, 0.2); border-bottom: 0; }
  .ab-tool-panel { padding: 38px 28px 42px; }
  .ab-tool-card { min-height: 300px; }
  .ab-practice { padding-inline: 28px; }
  .ab-practice-intro { grid-template-columns: 1fr; }
  .ab-practice-intro > p { grid-column: auto; }
  .ab-practice-list li { grid-template-columns: 0.18fr 1fr; }
  .ab-practice-list i { grid-column: 2; justify-self: start; }
  .ab-ledger { padding-inline: 28px; }
  .ab-ledger-heading { grid-template-columns: 1fr; }
  .ab-ledger-item { grid-template-columns: 0.28fr 0.72fr; }
  .ab-ledger-item > p { grid-column: 2; }
  .ab-frequency { grid-template-columns: 1fr; padding-inline: 28px; }
  .ab-frequency-visual { min-height: 300px; }
}

@media (max-width: 680px) {
  .ab-hero { padding: 88px 18px 28px; background-size: 36px 36px, 36px 36px, auto; }
  .ab-meta { min-height: 54px; padding: 0 12px; font-size: 0.54rem; }
  .ab-hero-grid { gap: 44px; padding: 48px 0 44px; }
  .ab-hero-copy { padding-right: 0; }
  .ab-kicker { font-size: 0.58rem; }
  .ab-hero h1 { font-size: clamp(3.8rem, 18vw, 6.1rem); line-height: 0.82; }
  .ab-intro { grid-template-columns: 1fr; align-items: start; margin-top: 34px; }
  .ab-intro p { font-size: 1.06rem; }
  .ab-scroll-link { width: 100%; white-space: normal; }
  .ab-portrait-card { width: calc(100% - 18px); margin: 0 18px 0 0; }
  .ab-portrait-window { box-shadow: 14px 15px 0 rgba(23, 104, 79, 0.14); }
  .ab-portrait-card figcaption { grid-template-columns: 1fr; gap: 8px; padding-left: 0; }
  .ab-hero-foot { grid-template-columns: auto 1fr; }
  .ab-hero-foot span:last-child { display: none; }
  .ab-principle { padding: 100px 18px; }
  .ab-principle-copy { margin-top: 52px; }
  .ab-principle-copy h2 { font-size: clamp(2.9rem, 13vw, 4.7rem); }
  .ab-proof-strip { grid-template-columns: 1fr 1fr; margin-top: 80px; }
  .ab-proof-strip article { min-height: 140px; padding: 20px; }
  .ab-proof-strip strong { font-size: 2.8rem; }
  .ab-proof-strip span { font-size: 0.62rem; }
  .ab-skills { padding: 92px 18px; }
  .ab-skills-heading h2,
  .ab-practice-intro h2,
  .ab-ledger-heading h2,
  .ab-frequency-copy h2 { font-size: clamp(3rem, 14vw, 4.8rem); }
  .ab-skill-field { grid-template-columns: 1fr; margin-top: 52px; }
  .ab-skill-card { min-height: 188px; }
  .ab-toolkit { padding: 100px 18px; }
  .ab-toolkit-heading h2 { font-size: clamp(3rem, 14vw, 4.8rem); }
  .ab-toolkit-console { margin-top: 62px; box-shadow: 12px 14px 0 rgba(245, 213, 38, 0.13); }
  .ab-tool-tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); overflow: visible; }
  .ab-tool-tabs button { min-height: 98px; padding: 19px 14px; border-bottom: 1px solid rgba(242, 241, 236, 0.2); }
  .ab-tool-tabs button:nth-child(2n) { border-right: 0; }
  .ab-tool-tabs button:hover,
  .ab-tool-tabs button:focus-visible { padding-left: 18px; }
  .ab-tool-panel { padding: 30px 18px 24px; }
  .ab-tool-panel > header { display: block; }
  .ab-tool-panel > header p { margin-top: 12px; text-align: left; }
  .ab-tool-grid { grid-template-columns: 1fr; }
  .ab-tool-card { min-height: 260px; padding: 26px; }
  .ab-practice { padding: 100px 18px; }
  .ab-practice-list { margin-top: 76px; }
  .ab-practice-list li { grid-template-columns: 1fr; gap: 18px; padding: 34px 0; }
  .ab-practice-list i { grid-column: auto; }
  .ab-ledger { padding: 100px 18px; }
  .ab-ledger-grid { margin-top: 76px; }
  .ab-ledger-item { grid-template-columns: 1fr; gap: 22px; padding: 34px 0; }
  .ab-ledger-item > p { grid-column: auto; }
  .ab-frequency { min-height: auto; padding: 100px 18px; gap: 60px; }
  .ab-frequency-visual { min-height: 240px; }
}

@media (prefers-reduced-motion: reduce) {
  .ab-title-line > span { transform: none; transition: none; }
  .ab-portrait-card { transform: none !important; transition: none; }
  .ab-skill-card { transform: translate(-50%, -50%); transition: none; }
  .ab-tool-panel { animation: none; }
  .ab-tool-card { transform: none !important; transition: none; }
  .ab-frequency-visual span { transition: none; }
}