/*
 * LP portal index shell
 * Matches the visual language of machi-create.com without changing each LP.
 */

:root {
  --portal-bg: #f6f8fb;
  --portal-bg-soft: #eef4f7;
  --portal-surface: #ffffff;
  --portal-ink: #15202b;
  --portal-text: #243241;
  --portal-muted: #64748b;
  --portal-primary: #245bff;
  --portal-primary-dark: #173c9f;
  --portal-secondary: #0f9f8f;
  --portal-accent: #f2a51a;
  --portal-pink: #de3c7b;
  --portal-line: #dce5ee;
  --portal-line-strong: #b8c7d8;
  --portal-radius: 8px;
  --portal-shadow: 0 18px 48px rgba(21, 32, 43, 0.08);
  --portal-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --portal-font: "Inter", "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body.genre-index {
  min-height: 100vh;
  margin: 0;
  padding: 0 0 0 88px;
  color: var(--portal-text);
  font-family: var(--portal-font);
  font-feature-settings: "palt" 1;
  background-color: var(--portal-bg);
  background-image:
    linear-gradient(120deg, transparent 0 47%, rgba(36, 91, 255, 0.045) 47% 47.25%, transparent 47.25% 100%),
    linear-gradient(90deg, rgba(36, 91, 255, 0.045) 1px, transparent 1px),
    linear-gradient(180deg, rgba(15, 159, 143, 0.035) 1px, transparent 1px),
    linear-gradient(180deg, #f8fbfd 0%, #eef5f8 48%, #ffffff 100%);
  background-size: 360px 360px, 56px 56px, 56px 56px, 100% 100%;
  -webkit-font-smoothing: antialiased;
}

.portal-index-rail {
  position: fixed;
  z-index: 30;
  inset: 0 auto 0 0;
  width: 88px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  border-right: 1px solid rgba(184, 199, 216, 0.72);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 10px 0 34px rgba(21, 32, 43, 0.05);
  backdrop-filter: blur(18px);
}

.portal-index-rail__logo {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: var(--portal-radius);
  color: #fff;
  background: linear-gradient(145deg, var(--portal-primary), var(--portal-secondary));
  box-shadow: 0 10px 26px rgba(36, 91, 255, 0.24);
  font: 900 16px/1 Inter, sans-serif;
  text-decoration: none;
}

.portal-index-rail__label {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 12px;
  color: var(--portal-ink);
  font-size: 10px;
  font-weight: 850;
  letter-spacing: .16em;
  text-decoration: none;
  writing-mode: vertical-rl;
  white-space: nowrap;
}

.portal-index-rail__label::before {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: 999px;
  background: var(--portal-ink);
}

.portal-index-rail__home {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--portal-line);
  border-radius: var(--portal-radius);
  color: var(--portal-primary-dark);
  background: rgba(255, 255, 255, 0.88);
  font-size: 18px;
  text-decoration: none;
  transition: transform 220ms var(--portal-ease), color 220ms var(--portal-ease), border-color 220ms var(--portal-ease);
}

.portal-index-rail__home:hover {
  color: var(--portal-secondary);
  border-color: var(--portal-secondary);
  transform: translateY(-2px);
}

.portal-index-topbar {
  width: min(1180px, calc(100% - 64px));
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: 0 auto;
  border-bottom: 1px solid rgba(184, 199, 216, 0.62);
}

.portal-index-topbar__brand {
  color: var(--portal-ink);
  font-size: 14px;
  font-weight: 900;
  text-decoration: none;
}

.portal-index-topbar__nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.portal-index-topbar__nav a {
  color: var(--portal-muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .04em;
  text-decoration: none;
}

.portal-index-topbar__nav a:hover,
.portal-index-topbar__nav a[aria-current="page"] {
  color: var(--portal-primary);
}

.genre-index__inner {
  width: min(1180px, calc(100% - 64px));
  margin: 0 auto;
  padding: clamp(56px, 7vw, 96px) 0 100px;
}

.genre-index__breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 9px;
  margin: 0 0 34px;
  color: var(--portal-muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.genre-index__breadcrumbs a {
  color: var(--portal-muted);
  text-decoration: none;
}

.genre-index__breadcrumbs a:hover {
  color: var(--portal-primary);
}

.genre-index__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 22px;
  padding: 8px 13px;
  border: 1px solid rgba(36, 91, 255, 0.16);
  border-radius: 999px;
  color: var(--portal-primary-dark);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 8px 24px rgba(21, 32, 43, 0.05);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.genre-index__eyebrow::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--portal-secondary);
  box-shadow: 0 0 0 5px rgba(15, 159, 143, 0.12);
}

.genre-index h1 {
  max-width: 920px;
  margin: 0;
  color: var(--portal-ink);
  font-size: clamp(3rem, 7.4vw, 6.7rem);
  font-weight: 950;
  line-height: 1.02;
  letter-spacing: -.055em;
  text-wrap: balance;
}

.genre-index__lead {
  max-width: 760px;
  margin: 30px 0 0;
  color: var(--portal-muted);
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  font-weight: 600;
  line-height: 1.9;
}

.genre-index__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: clamp(56px, 8vw, 94px) 0 24px;
}

.genre-index__summary-title {
  margin: 0;
  color: var(--portal-ink);
  font-size: clamp(1.45rem, 2.3vw, 2.1rem);
  font-weight: 900;
  letter-spacing: -.035em;
}

.genre-index__count {
  color: var(--portal-primary-dark);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .08em;
}

.genre-index__grid {
  counter-reset: portal-card;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.genre-index__card {
  --card-accent: var(--portal-primary);
  counter-increment: portal-card;
  position: relative;
  min-height: 238px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow: hidden;
  padding: 30px 30px 72px;
  border: 1px solid rgba(184, 199, 216, 0.76);
  border-radius: var(--portal-radius);
  color: var(--portal-text);
  background: rgba(255, 255, 255, 0.91);
  box-shadow: var(--portal-shadow);
  text-decoration: none;
  transition: transform 280ms var(--portal-ease), box-shadow 280ms var(--portal-ease), border-color 280ms var(--portal-ease);
}

.genre-index__card:nth-child(3n + 2) { --card-accent: var(--portal-secondary); }
.genre-index__card:nth-child(3n) { --card-accent: var(--portal-pink); }
.genre-index__card:nth-child(5n) { --card-accent: var(--portal-accent); }

.genre-index__card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: linear-gradient(90deg, var(--card-accent), transparent 82%);
}

.genre-index__card::after {
  content: "↗";
  position: absolute;
  right: 24px;
  bottom: 22px;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--card-accent) 28%, var(--portal-line));
  border-radius: var(--portal-radius);
  color: var(--card-accent);
  background: color-mix(in srgb, var(--card-accent) 7%, #fff);
  font-size: 18px;
  transition: color 220ms var(--portal-ease), background 220ms var(--portal-ease), transform 220ms var(--portal-ease);
}

.genre-index__card:hover {
  color: var(--portal-text);
  border-color: color-mix(in srgb, var(--card-accent) 44%, var(--portal-line));
  box-shadow: 0 26px 64px rgba(21, 32, 43, 0.13);
  transform: translateY(-7px);
}

.genre-index__card:hover::after {
  color: #fff;
  background: var(--card-accent);
  transform: translate(2px, -2px);
}

.genre-index__card strong {
  display: block;
  margin: 24px 0 2px;
  color: var(--portal-ink);
  font-size: clamp(1.15rem, 1.8vw, 1.42rem);
  font-weight: 900;
  line-height: 1.38;
}

.genre-index__card strong::before {
  content: "0" counter(portal-card) " / PROJECT";
  display: block;
  margin-bottom: 17px;
  color: var(--card-accent);
  font: 900 10px/1 Inter, sans-serif;
  letter-spacing: .12em;
}

.genre-index__card span {
  color: var(--portal-muted);
  font-size: 14px;
  font-weight: 650;
  line-height: 1.65;
}

.genre-index__card span:last-child {
  margin-top: auto;
  padding-top: 10px;
  color: var(--portal-ink);
  font: 800 10px/1.4 Inter, var(--portal-font);
  letter-spacing: .04em;
  opacity: .58;
}

.genre-index__back {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 40px;
  padding: 13px 18px;
  border: 1px solid var(--portal-line-strong);
  border-radius: var(--portal-radius);
  color: var(--portal-primary-dark);
  background: rgba(255, 255, 255, 0.78);
  font-size: 13px;
  font-weight: 850;
  text-decoration: none;
  transition: border-color 220ms var(--portal-ease), transform 220ms var(--portal-ease);
}

.genre-index__back::before { content: "←"; }
.genre-index__back:hover { border-color: var(--portal-primary); transform: translateX(-3px); }

.portal-index-footer {
  margin-left: 0;
  padding: 48px max(32px, calc((100vw - 88px - 1180px) / 2));
  color: rgba(255, 255, 255, .68);
  background: linear-gradient(180deg, #15202b 0%, #0f1720 100%);
}

.portal-index-footer__inner {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
}

.portal-index-footer strong {
  display: block;
  margin-bottom: 8px;
  color: #fff;
  font-size: 18px;
}

.portal-index-footer p {
  max-width: 600px;
  margin: 0;
  font-size: 12px;
  line-height: 1.7;
}

.portal-index-footer a { color: #fff; font-size: 12px; font-weight: 800; }

@media (max-width: 980px) {
  .genre-index__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  body.genre-index { padding: 72px 0 0; }

  .portal-index-rail {
    inset: 0 0 auto;
    width: 100%;
    height: 72px;
    flex-direction: row;
    padding: 0 18px;
    border-right: 0;
    border-bottom: 1px solid rgba(184, 199, 216, .72);
  }

  .portal-index-rail__logo { width: 42px; height: 42px; }
  .portal-index-rail__label { writing-mode: initial; }
  .portal-index-rail__label::before { width: 18px; }
  .portal-index-rail__home { width: 40px; height: 40px; }

  .portal-index-topbar {
    width: calc(100% - 40px);
    min-height: 64px;
  }

  .portal-index-topbar__nav a:first-child { display: none; }

  .genre-index__inner {
    width: calc(100% - 40px);
    padding: 46px 0 72px;
  }

  .genre-index__breadcrumbs { margin-bottom: 25px; }
  .genre-index h1 { font-size: clamp(2.65rem, 15vw, 4.6rem); }
  .genre-index__lead { margin-top: 22px; }
  .genre-index__summary { margin-top: 54px; }
  .genre-index__grid { grid-template-columns: 1fr; }
  .genre-index__card { min-height: 216px; }
  .portal-index-footer { padding: 38px 20px; }
  .portal-index-footer__inner { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 420px) {
  .portal-index-topbar__brand { font-size: 12px; }
  .portal-index-topbar__nav { gap: 14px; }
  .genre-index__inner { width: calc(100% - 32px); }
  .genre-index__summary { align-items: flex-end; }
  .genre-index__card { padding: 26px 24px 68px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .001ms !important; }
  .genre-index__card:hover { transform: none; }
}

/* 2026-07-18: compact heading scale and reduce unused vertical space. */
.genre-index__inner{padding:clamp(46px,5.5vw,72px) 0 76px}
.genre-index__breadcrumbs{margin-bottom:26px}
.genre-index h1{max-width:860px;font-size:clamp(2.65rem,5.8vw,5.2rem);line-height:1.08}
.genre-index__lead{margin-top:24px}
.genre-index__summary{margin-top:clamp(42px,5vw,64px)}

@media (max-width: 720px) {
  .genre-index__inner{padding:38px 0 60px}
  .genre-index h1{font-size:clamp(2.35rem,11.5vw,3.7rem);line-height:1.1}
  .genre-index__summary{margin-top:40px}
}

/* 2026-07-20: compact LP portal introduction. */
body.genre-index>.genre-index__inner{padding-top:clamp(38px,4vw,58px)}
.genre-index h1{font-size:clamp(2.8rem,6vw,5.4rem)}
.genre-index__lead{margin-top:20px;line-height:1.75}

/* 2026-07-20: compact content rhythm for the LP library. */
.genre-index h1 { max-width: 1100px; font-size: 4rem; line-height: 1.08; text-wrap: balance; }
.genre-index__lead { max-width: 680px; line-height: 1.65; }
@media (min-width: 721px) {
  body.genre-index > .genre-index__inner { padding-top: 36px; padding-bottom: 60px; }
  .genre-index__summary { margin-top: 36px; }
  .genre-index__card { min-height: 205px; }
}
@media (max-width: 720px) {
  .genre-index h1 { font-size: 2.65rem; }
}