:root[data-theme="arcade"] .a-who { padding-top: clamp(120px, calc(var(--vh, 1svh) * 16), 170px); padding-bottom: clamp(40px, 6vw, 88px); }
:root[data-theme="arcade"] .a-portrait img {
  border: 1px solid var(--ar-line); border-left: 0; border-radius: 0; background: var(--ar-panel);
  filter: none; opacity: 1; box-shadow: 12px 12px 0 rgba(47, 123, 255, 0.16);
}
@media (max-width: 899px) {
  :root[data-theme="arcade"] .a-portrait img { border-top: 0; aspect-ratio: 4 / 4.2; object-position: 50% 18%; box-shadow: none; }
}
:root[data-theme="arcade"] .a-title {
  font-family: var(--font-serif); font-weight: 400; color: var(--ar-text);
  font-size: clamp(2.8rem, 6.4vw, 5.4rem); line-height: 1; letter-spacing: -0.01em; margin: 0 0 24px; max-width: 12ch; text-wrap: balance;
}
:root[data-theme="arcade"] .a-lead {
  font-family: var(--font-text); font-weight: 400; font-size: clamp(1.25rem, 2.2vw, 1.5rem); line-height: 1.4; letter-spacing: 0;
  color: var(--ar-text); max-width: 30ch; margin: 0 0 clamp(26px, 3.4vw, 40px);
}
:root[data-theme="arcade"] .a-why-list dd a { color: var(--ar-text); text-decoration-color: var(--ar-blue); text-underline-offset: 6px; }
@media (hover: hover) { :root[data-theme="arcade"] .a-why-list dd a:hover { color: var(--ar-melon); text-decoration-color: var(--ar-melon); } }

:root[data-theme="arcade"] .a-why { padding-block: clamp(72px, 10vw, 150px); }
:root[data-theme="arcade"] .a-why-head {
  font-family: var(--font-serif); font-weight: 400; color: var(--ar-text);
  font-size: clamp(3rem, 7.2vw, 6.2rem); line-height: 1; letter-spacing: -0.012em; max-width: 12ch; margin: 0;
}
:root[data-theme="arcade"] .a-why-head b { font-weight: 400; font-style: italic; color: var(--ar-blue-l); }
:root[data-theme="arcade"] .a-lead-rule {
  font-family: var(--font-serif); font-weight: 400; color: var(--ar-text);
  font-size: clamp(1.8rem, 3.2vw, 2.5rem); line-height: 1.12; letter-spacing: -0.005em; margin: 0 0 20px;
}
:root[data-theme="arcade"] .a-why-copy .who-line { color: var(--ar-dim); font-size: 1.125rem; line-height: 1.65; max-width: 46ch; margin-bottom: clamp(28px, 3.4vw, 40px); }

:root[data-theme="arcade"] #story { padding-top: clamp(40px, 6vw, 88px); padding-bottom: clamp(64px, 9vw, 130px); }
:root[data-theme="arcade"] .story { max-width: none; }
:root[data-theme="arcade"] .chap {
  display: block; position: relative; padding: clamp(36px, 5vw, 64px) 0 0; border-top: 1px solid var(--ar-line);
  transform: none; opacity: 1;
}
:root[data-theme="arcade"] .chap:last-child { border-bottom: 0; }
:root[data-theme="arcade"] .chap-yr {
  font-family: var(--font-serif) !important; font-weight: 400; font-size: clamp(4.4rem, 11vw, 8.4rem); line-height: 0.9;
  letter-spacing: -0.02em; color: var(--ar-blue-l); margin-bottom: clamp(16px, 2.4vw, 28px);
}
:root[data-theme="arcade"] .ar-here .chap-yr { color: var(--ar-melon); }
:root[data-theme="arcade"] .chap-body { display: grid; gap: 28px clamp(28px, 4vw, 56px); margin-bottom: clamp(28px, 4vw, 44px); }
@media (min-width: 900px) {
  :root[data-theme="arcade"] .chap-body:has(.chap-entry + .chap-entry) { grid-auto-flow: column; grid-auto-columns: minmax(0, 1fr); }
}
:root[data-theme="arcade"] .chap-entry + .chap-entry { margin-top: 0; }
:root[data-theme="arcade"] .chap-entry h3 {
  font-size: clamp(1.5rem, 2.4vw, 1.9rem); line-height: 1.12; margin: 0 0 10px; color: var(--ar-text);
  text-decoration: underline 3px transparent; text-underline-offset: 8px;
}
:root[data-theme="arcade"] .ar-here .chap-entry.ar-now h3 { text-decoration-color: var(--ar-melon); }
:root[data-theme="arcade"] .chap-entry p { font-size: 1.125rem; line-height: 1.6; color: var(--ar-dim); max-width: 34ch; margin: 0; }
:root[data-theme="arcade"] .chap-body:not(:has(.chap-entry + .chap-entry)) .chap-entry p { max-width: 46ch; }

:root[data-theme="arcade"] .ar-lane {
  position: relative; display: block; width: 100%; margin-bottom: 14px;
  background: radial-gradient(55% 100% at 50% 100%, rgba(47, 123, 255, 0.24), rgba(47, 123, 255, 0) 72%);
}
:root[data-theme="arcade"] .ar-lane canvas { display: block; position: relative; z-index: 1; image-rendering: pixelated; touch-action: pan-y; pointer-events: none; }
:root[data-theme="arcade"] .ar-lane::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -14px; height: 14px;
  background:
    linear-gradient(var(--ar-blue-l), var(--ar-blue-l)) top / 100% 4px no-repeat,
    repeating-linear-gradient(90deg, var(--ar-blue-d) 0 20px, #163F94 20px 24px);
}

@media (max-width: 899px) {
  :root[data-theme="arcade"] .chap-entry p { max-width: 46ch; }
}
@media (prefers-reduced-motion: reduce) {
  :root[data-theme="arcade"] .chap-entry h3 { text-decoration-color: transparent !important; }
}