/* ==========================================================================
   MGORU — 白地 × 黒 × 朱一点
   DESIGN.md に準拠。ビルドツールなし、素の CSS。
   ========================================================================== */

/* 1. トークン ------------------------------------------------------------- */

:root {
  --paper: #ffffff;
  --ink: #111111;
  --accent: #e8442e;
  --accent-text: #c0361f;
  --muted: #6b6b6b;

  --grid: 1080px;
  --measure: 40rem;
  --pad: clamp(1.25rem, 4vw, 2rem);

  --font-display: "Outfit", "Helvetica Neue", Arial, sans-serif;
  --font-ja: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Hiragino Sans",
    "Hiragino Kaku Gothic ProN", sans-serif;
}

/* 2. リセットと下地 ------------------------------------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  overflow-x: clip; /* 保険。vw 由来の横スクロールを殺す */
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-ja);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.8;
  line-break: strict;
  font-feature-settings: "palt" 1;
}

::selection {
  background: var(--ink);
  color: var(--paper);
}

.invert ::selection {
  background: var(--paper);
  color: var(--ink);
}

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

.invert :focus-visible {
  outline-color: var(--paper);
}

a {
  color: var(--accent-text);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25em;
}

a:hover {
  color: var(--ink);
}

.invert a {
  color: var(--paper);
}

.invert a:hover {
  color: var(--accent);
}

img,
svg {
  max-width: 100%;
}

/* 3. 共通パーツ ----------------------------------------------------------- */

.wrap {
  width: 100%;
  max-width: var(--grid);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.prose {
  max-width: var(--measure);
}

/* ラベル体 */
.label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0;
}

.label--accent {
  color: var(--accent-text);
}

/* チップ */
.chip {
  display: inline-block;
  border: 2px solid var(--ink);
  padding: 0.1rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1.7;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.chip--soon {
  color: var(--accent-text);
  border-color: var(--accent-text);
}

/* セクション見出し（細罫線＋連番） */
.section-head {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  border-top: 1px solid var(--ink);
  padding-top: 0.85rem;
  margin: 0 0 2rem;
}

.section-head__num {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--accent-text);
}

.invert .section-head {
  border-top-color: var(--paper);
}

.invert .section-head__num {
  color: var(--accent);
}

.section-head__title {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0;
}

.section-head__ja {
  font-family: var(--font-ja);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--muted);
  margin-left: 0.65rem;
}

.invert .section-head__ja {
  color: var(--paper);
  opacity: 0.7;
}

.note {
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

/* 4. サイトヘッダー ------------------------------------------------------- */

.site-header {
  padding-block: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
}

.logo:hover {
  color: var(--accent-text);
}

/* 5. ヒーロー ------------------------------------------------------------- */

.hero {
  display: flex;
  flex-direction: column;
  min-height: 85vh;
  min-height: 85svh;
  padding-bottom: 1.5rem;
}

.hero__inner {
  position: relative;
  margin-top: auto;
  padding-block: 2rem;
}

.hero__mark {
  font-family: var(--font-display);
  font-size: clamp(4rem, 15vw, 10rem);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  margin: 0.4rem 0 0;
}

.hero__mark em {
  font-style: normal;
  color: var(--accent);
}

.hero__lead {
  max-width: var(--measure);
  margin: 1.4rem 0 0;
  font-size: clamp(1rem, 2.2vw, 1.1875rem);
  font-weight: 500;
}

.hero__foot {
  margin-top: auto;
}

.hero__stickers {
  position: absolute;
  top: 0;
  right: var(--pad);
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  pointer-events: none;
}

.sticker {
  width: clamp(30px, 6vw, 54px);
  height: auto;
  display: block;
}

.sticker--b {
  margin-top: clamp(1.75rem, 5vw, 3.25rem);
  transform: rotate(-8deg);
}

/* スクロール誘導 */
.scroll-cue {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 44px;
  color: var(--ink);
  text-decoration: none;
}

.scroll-cue__arrow {
  font-size: 1rem;
  line-height: 1;
}

@media (prefers-reduced-motion: no-preference) {
  .scroll-cue__arrow {
    animation: cue 1.5s ease-in-out infinite;
  }
}

@keyframes cue {
  0%,
  100% {
    transform: translateY(-3px);
  }
  50% {
    transform: translateY(3px);
  }
}

/* 6. WORKS --------------------------------------------------------------- */

.section {
  padding-block: 3.5rem;
}

.works {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}

@media (min-width: 720px) {
  .works {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

.card {
  display: flex;
  flex-direction: column;
  border: 2px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  text-decoration: none;
  transition: transform 150ms ease-out, box-shadow 150ms ease-out;
}

@media (prefers-reduced-motion: reduce) {
  .card {
    transition: none;
  }
}

.card:hover,
.card:focus-visible {
  transform: translateY(-2px);
  box-shadow: 4px 4px 0 var(--ink);
  color: var(--ink);
}

.card__art {
  border-bottom: 2px solid var(--ink);
  padding: 1.5rem 1.25rem;
}

.card__art .doodle {
  display: block;
  width: 100%;
  height: auto;
}

.card__body {
  padding: 1.25rem;
}

.card__name {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 0;
}

.card__en {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 6vw, 2.25rem);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

.card__ja {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--muted);
}

.card__desc {
  margin: 0.75rem 0 0;
  font-size: 1rem;
}

.card__meta {
  margin: 1rem 0 0;
}

/* 7. ABOUT（黒反転） ------------------------------------------------------ */

.invert {
  background: var(--ink);
  color: var(--paper);
}

.about__body {
  max-width: var(--measure);
}

.about__body p {
  margin: 0 0 0.9rem;
  font-size: clamp(1rem, 2vw, 1.125rem);
  font-weight: 500;
}

.about__body p:last-child {
  margin-bottom: 0;
}

/* 8. 下層ページ ----------------------------------------------------------- */

.page-head {
  padding-block: 1.5rem 2.5rem;
}

.page-mark {
  font-family: var(--font-display);
  font-size: clamp(3rem, 12vw, 6rem);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  margin: 0.4rem 0 0;
}

.page-mark--sm {
  font-size: clamp(2rem, 7vw, 3rem);
}

.page-mark a {
  color: inherit;
  text-decoration: none;
}

.page-mark a:hover {
  color: var(--accent-text);
}

.page-mark__ja {
  display: block;
  font-family: var(--font-ja);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--muted);
  margin-top: 0.6rem;
}

.page-title {
  font-size: clamp(1.5rem, 4.5vw, 2rem);
  font-weight: 700;
  line-height: 1.45;
  margin: 0.75rem 0 0;
}

.page-lead {
  max-width: var(--measure);
  margin: 1rem 0 0;
  font-size: clamp(1rem, 2.2vw, 1.125rem);
  font-weight: 500;
}

.doc {
  padding-bottom: 3.5rem;
}

.doc__art {
  max-width: 22rem;
  margin: 2rem 0 0;
}

.doc__art .doodle {
  display: block;
  width: 100%;
  height: auto;
}

.doc h2 {
  border-top: 1px solid var(--ink);
  padding-top: 0.9rem;
  margin: 3rem 0 0.9rem;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.6;
}

.doc h2 .section-head__num {
  display: block;
  margin-bottom: 0.35rem;
}

.doc p {
  margin: 0 0 1rem;
}

.doc p strong {
  display: block;
  font-weight: 700;
}

.doc ul {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
}

.doc li {
  position: relative;
  padding-left: 1.25rem;
  margin: 0 0 0.6rem;
}

.doc li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 7px;
  height: 7px;
  background: var(--accent);
}

/* 9. フッター ------------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--ink);
  padding-block: 1.5rem 3rem;
}

.site-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0 1.5rem;
  margin-bottom: 0.5rem;
}

.site-footer__nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 0.875rem;
  color: var(--ink);
  text-decoration: none;
}

.site-footer__nav a:hover {
  color: var(--accent-text);
  text-decoration: underline;
}

.site-footer__copy {
  margin: 0;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* 10. スクロールイン ------------------------------------------------------ */

.js [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 300ms ease-out, transform 300ms ease-out;
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}