.ab-dive { position: fixed; top: 0; width: 520px; height: 100%; z-index: -1; pointer-events: none; display: block; }
:root:not([data-theme="abyss"]) .ab-dive { display: none; }

:root[data-theme="abyss"] .a-who { padding-top: clamp(120px, calc(var(--vh, 1svh) * 16), 170px); padding-bottom: clamp(40px, 6vw, 88px); }
:root[data-theme="abyss"] .a-portrait img {
  border: 1px solid var(--ab-hair); border-left: 0; border-radius: 0 28px 28px 0; background: var(--ab-deep); filter: none; opacity: 1;
}
@media (max-width: 899px) {
  :root[data-theme="abyss"] .a-portrait img { border-radius: 0 0 24px 0; border-top: 0; aspect-ratio: 4 / 4.2; object-position: 50% 18%; }
}
:root[data-theme="abyss"] .a-who-copy { position: relative; isolation: isolate; }
:root[data-theme="abyss"] .a-who-copy::before {
  content: ""; position: absolute; z-index: -1; pointer-events: none; inset: -10% -10% -6% -8%;
  background: radial-gradient(closest-side, rgba(3, 14, 22, 0.66) 0%, rgba(3, 14, 22, 0.5) 58%, rgba(3, 14, 22, 0) 100%);
}
:root[data-theme="abyss"] .a-title {
  font-family: var(--font-ab-display); font-weight: 300; font-variation-settings: "wght" 300; color: var(--ab-foam);
  font-size: clamp(2.7rem, 6vw, 5rem); line-height: 1.02; letter-spacing: -0.035em; margin: 0 0 24px; max-width: 13ch; text-wrap: balance;
}
:root[data-theme="abyss"] .a-lead {
  font-family: var(--font-ab-body); font-weight: 400; font-size: clamp(1.25rem, 2.2vw, 1.5rem); line-height: 1.4; letter-spacing: 0;
  color: var(--ab-foam); max-width: 30ch; margin: 0 0 clamp(26px, 3.4vw, 40px);
}
:root[data-theme="abyss"] .a-facts dd { font-family: var(--font-ab-body); font-size: 1.1875rem; font-weight: 400; line-height: 1.5; color: var(--ab-foam); }
:root[data-theme="abyss"] .a-facts dt { font-size: 0.9375rem; }

:root[data-theme="abyss"] .a-why { padding-block: var(--ab-sec); }
:root[data-theme="abyss"] .a-why-head {
  font-family: var(--font-ab-display); font-weight: 300; font-variation-settings: "wght" 300; color: var(--ab-foam);
  font-size: clamp(3rem, 7.2vw, 6.4rem); line-height: 1.0; letter-spacing: -0.04em; max-width: 12ch; margin: 0;
}
:root[data-theme="abyss"] .a-why-head b { font-weight: 400; color: var(--ab-foam); }
:root[data-theme="abyss"] .a-lead-rule {
  font-family: var(--font-ab-display); font-weight: 300; font-variation-settings: "wght" 300; color: var(--ab-foam);
  font-size: clamp(1.8rem, 3.2vw, 2.5rem); line-height: 1.12; letter-spacing: -0.025em; margin: 0 0 20px;
}
:root[data-theme="abyss"] .a-why-copy .who-line { color: var(--ab-foam); font-size: 1.1875rem; line-height: 1.65; max-width: 46ch; margin-bottom: clamp(28px, 3.4vw, 40px); }
:root[data-theme="abyss"] .a-why-list dd { font-family: var(--font-ab-body); font-size: 1.1875rem; font-weight: 400; line-height: 1.5; color: var(--ab-foam); }
:root[data-theme="abyss"] .a-why-list dd a { color: var(--ab-foam); text-decoration-color: var(--ab-hair); text-underline-offset: 6px; }
@media (hover: hover) { :root[data-theme="abyss"] .a-why-list dd a:hover { color: var(--ab-pink); text-decoration-color: var(--ab-pink); } }

:root[data-theme="abyss"] #story { padding-top: var(--ab-sec); padding-bottom: clamp(40px, 6vw, 88px); }
:root[data-theme="abyss"] #story h2 {
  font-family: var(--font-ab-display); font-weight: 300; font-variation-settings: "wght" 300; color: var(--ab-foam);
  font-size: clamp(2.6rem, 6vw, 5rem); line-height: 1.02; letter-spacing: -0.03em; margin: 0 0 clamp(48px, 6vw, 80px);
}
:root[data-theme="abyss"] .story { position: relative; max-width: 1000px; padding-left: clamp(78px, 11vw, 150px); }
:root[data-theme="abyss"] .chap { border: 0; padding: clamp(30px, 4vw, 52px) 0 clamp(34px, 4.4vw, 60px); gap: 10px clamp(30px, 4.4vw, 64px); }
:root[data-theme="abyss"] .chap:last-child { border: 0; }
:root[data-theme="abyss"] .chap-yr {
  font-family: var(--font-ab-display); font-weight: 300; font-variation-settings: "wght" 300; letter-spacing: -0.04em; line-height: 0.9;
  font-size: clamp(3.2rem, 14vw, 4.6rem); color: var(--ab-foam-2); text-shadow: none;
  transition: color 1400ms var(--ab-ease);
}
@media (min-width: 760px) { :root[data-theme="abyss"] .chap-yr { font-size: clamp(4rem, 7.4vw, 6.6rem); } }
:root[data-theme="abyss"] .chap.ab-lit .chap-yr { color: var(--ab-pink); }
:root[data-theme="abyss"] .chap-entry h3 {
  font-family: var(--font-ab-display); font-weight: 300; font-variation-settings: "wght" 300; color: var(--ab-foam);
  font-size: clamp(1.5rem, 2.4vw, 1.9rem); line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 8px;
}
:root[data-theme="abyss"] .chap-entry p { font-family: var(--font-ab-body); font-size: 1.1875rem; line-height: 1.6; color: var(--ab-foam-2); max-width: 52ch; }
:root[data-theme="abyss"] .chap-entry + .chap-entry { margin-top: 32px; }
:root[data-theme="abyss"] .chap.slide-l { opacity: 1; transform: none; }

@media (max-width: 759px) {
  :root[data-theme="abyss"] .story { padding-left: 62px; }
  :root[data-theme="abyss"] .chap-yr { font-size: clamp(2.8rem, 13vw, 3.6rem); }
}

@media (prefers-reduced-motion: reduce) {
  :root[data-theme="abyss"] .chap-yr { transition: none; }
}