@charset "UTF-8";
/* =========================================================
   間 建築設計事務所（架空）TOPページ
   方針: モノトーン / 作品写真が主役 / 12カラムグリッド / SPベース
   ========================================================= */

/* ---------- 変数 ---------- */
:root {
  --color-bg: #f3f2ef;
  --color-ink: #141414;
  --color-gray: #6b6a66;
  --color-line: #d6d4cf;
  --color-dark: #1b1b1a;
  --color-dark-line: #3a3a38;
  --color-dark-text: #b9b7b2;
  --color-white: #ffffff;
  --color-focus: #141414;
  --font-ja: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --font-en: "Jost", "Helvetica Neue", Arial, sans-serif;
  --page-x: 20px;
  --header-h: 64px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-ja);
  font-size: 14px;
  line-height: 1.9;
  letter-spacing: .04em;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
p,
figure,
dl,
dd,
ol,
ul {
  margin: 0;
}

ol,
ul {
  padding: 0;
  list-style: none;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 4px;
}

.u-pc-only {
  display: none;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 12px;
  z-index: 100;
  padding: 8px 16px;
  background: var(--color-white);
}

.skip-link:focus {
  top: 12px;
}

/* ---------- 自主制作の帯 ---------- */
.sample-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 4px 16px;
  padding: 6px var(--page-x);
  background: var(--color-ink);
  color: var(--color-dark-text);
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: .12em;
}

.sample-bar span {
  font-family: var(--font-ja);
  letter-spacing: .04em;
}

/* ---------- ヘッダー ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  padding: 0 var(--page-x);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  transition: opacity .2s;
}

.site-logo:hover {
  opacity: .6;
}

.site-logo__mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--color-ink);
  font-size: 15px;
  font-weight: 500;
  line-height: 1;
}

.site-logo__text {
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .22em;
  line-height: 1.3;
}

.site-logo__sub {
  display: block;
  font-family: var(--font-ja);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: .12em;
  color: var(--color-gray);
}

.menu-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  background: none;
  border: 0;
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: .18em;
}

.menu-toggle__line {
  position: relative;
  width: 24px;
  height: 1px;
  background: var(--color-ink);
}

.menu-toggle__line::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 0;
  width: 24px;
  height: 1px;
  background: var(--color-ink);
}

.menu-toggle:hover .menu-toggle__label {
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* SP: メニューは開閉式 */
.global-nav {
  display: none;
  position: absolute;
  top: var(--header-h);
  left: 0;
  right: 0;
  padding: 8px var(--page-x) 24px;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
}

.global-nav.is-open {
  display: block;
}

.global-nav__link {
  display: block;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 14px;
  transition: color .2s;
}

.global-nav__link:hover {
  color: var(--color-gray);
  text-decoration: underline;
  text-underline-offset: 5px;
}

.global-nav__link--contact {
  margin-top: 16px;
  padding: 14px 16px;
  border: 1px solid var(--color-ink);
  text-align: center;
}

/* ---------- ヒーロー ---------- */
.hero {
  position: relative;
  padding: 40px var(--page-x) 56px;
}

.hero__en {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--color-gray);
}

.hero__title {
  margin-top: 16px;
  font-size: 30px;
  font-weight: 500;
  line-height: 1.6;
  letter-spacing: .08em;
}

.hero__lead {
  margin-top: 20px;
  font-size: 13px;
  line-height: 2.1;
  color: var(--color-gray);
}

.hero__figure {
  margin-top: 32px;
}

.hero__image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.hero__caption {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-top: 10px;
  font-size: 11px;
  color: var(--color-gray);
}

.hero__caption-en {
  font-family: var(--font-en);
  letter-spacing: .16em;
}

.hero__scroll {
  display: inline-block;
  margin-top: 24px;
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: .24em;
  transition: color .2s;
}

.hero__scroll:hover {
  color: var(--color-gray);
  text-decoration: underline;
  text-underline-offset: 5px;
}

/* ---------- セクション共通 ---------- */
.section {
  padding: 72px var(--page-x);
  border-top: 1px solid var(--color-line);
}

.section-head {
  margin-bottom: 40px;
}

.section-head__num {
  font-family: var(--font-en);
  font-size: 56px;
  font-weight: 300;
  line-height: 1;
  letter-spacing: 0;
}

.section-head__en {
  margin-top: 14px;
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--color-gray);
}

.section-head__title {
  margin-top: 4px;
  font-size: 20px;
  font-weight: 500;
  letter-spacing: .12em;
}

.section-head--light .section-head__en {
  color: var(--color-dark-text);
}

.section-note {
  margin-top: 32px;
  font-size: 11px;
  color: var(--color-gray);
}

.section-note--light {
  color: var(--color-dark-text);
}

/* スクロール表示（JSが html に is-ready を付けたときだけ隠す＝JS無効でも読める） */
.is-ready .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .8s ease, transform .8s ease;
}

.is-ready .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 理念 ---------- */
.philosophy__catch {
  font-size: 24px;
  font-weight: 500;
  line-height: 1.7;
  letter-spacing: .1em;
}

.philosophy__text {
  margin-top: 24px;
  font-size: 14px;
  line-height: 2.2;
}

.principle-list {
  margin-top: 48px;
  border-top: 1px solid var(--color-ink);
}

.principle-list__item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 4px 12px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-line);
}

.principle-list__num {
  grid-row: span 2;
  font-family: var(--font-en);
  font-size: 13px;
  color: var(--color-gray);
}

.principle-list__title {
  font-size: 16px;
  font-weight: 500;
}

.principle-list__text {
  font-size: 13px;
  color: var(--color-gray);
}

/* ---------- 作品 ---------- */
.work-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.work-filter__button {
  padding: 6px 14px;
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: 0;
  font-size: 12px;
  transition: border-color .2s, background-color .2s, color .2s;
}

.work-filter__button:hover {
  border-color: var(--color-ink);
}

.work-filter__button[aria-pressed="true"] {
  background: var(--color-ink);
  border-color: var(--color-ink);
  color: var(--color-white);
}

.work-filter__status {
  margin-top: 12px;
  font-size: 11px;
  color: var(--color-gray);
}

.work-list {
  display: grid;
  gap: 48px;
  margin-top: 32px;
}

.work-card[hidden] {
  display: none;
}

.work-card__image {
  width: 100%;
  background: var(--color-line);
}

.work-card__meta {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 2px 14px;
  padding-top: 14px;
}

.work-card__num {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--color-gray);
}

.work-card__title {
  font-size: 16px;
  font-weight: 500;
}

.work-card__info {
  grid-column: 2;
  font-size: 11px;
  color: var(--color-gray);
}

/* ---------- 設計の進め方（反転色） ---------- */
.process {
  background: var(--color-dark);
  color: var(--color-white);
  border-top: 0;
}

.process__lead {
  font-size: 14px;
  line-height: 2.1;
  color: var(--color-dark-text);
}

.process-list {
  display: grid;
  margin-top: 40px;
  border-top: 1px solid var(--color-dark-line);
}

.process-list__item {
  padding: 24px 0;
  border-bottom: 1px solid var(--color-dark-line);
}

.process-list__step {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--color-dark-text);
}

.process-list__title {
  margin-top: 6px;
  font-size: 17px;
  font-weight: 500;
}

.process-list__term {
  margin-top: 4px;
  font-size: 12px;
  color: var(--color-dark-text);
}

.process-list__text {
  margin-top: 10px;
  font-size: 13px;
  line-height: 2;
}

/* ---------- 掲載・受賞 ---------- */
.media-list {
  border-top: 1px solid var(--color-ink);
}

.media-list__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-line);
}

.media-list__date {
  font-family: var(--font-en);
  font-size: 13px;
  letter-spacing: .08em;
}

.media-list__type {
  justify-self: start;
  padding: 0 8px;
  border: 1px solid var(--color-line);
  font-size: 11px;
  color: var(--color-gray);
}

.media-list__title {
  grid-column: 1 / -1;
  font-size: 13px;
  line-height: 2;
}

/* ---------- 事務所概要 ---------- */
.office__image {
  width: 100%;
}

.office__caption {
  padding-top: 10px;
  font-size: 11px;
  color: var(--color-gray);
}

.office-data {
  margin-top: 40px;
  border-top: 1px solid var(--color-ink);
}

.office-data__row {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 13px;
}

.office-data__term {
  color: var(--color-gray);
}

/* ---------- お問い合わせ ---------- */
.contact {
  padding: 80px var(--page-x);
  border-top: 1px solid var(--color-line);
  text-align: center;
}

.contact__en {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--color-gray);
}

.contact__title {
  margin-top: 8px;
  font-size: 24px;
  font-weight: 500;
  letter-spacing: .12em;
}

.contact__text {
  margin-top: 20px;
  font-size: 13px;
  line-height: 2.1;
}

.contact__button {
  display: inline-flex;
  justify-content: space-between;
  gap: 40px;
  width: 100%;
  max-width: 360px;
  margin-top: 32px;
  padding: 20px 24px;
  background: var(--color-ink);
  border: 1px solid var(--color-ink);
  color: var(--color-white);
  font-size: 14px;
  letter-spacing: .1em;
  transition: background-color .2s, color .2s;
}

.contact__button:hover {
  background: transparent;
  color: var(--color-ink);
}

.contact__note {
  margin-top: 14px;
  font-size: 11px;
  color: var(--color-gray);
}

/* ---------- フッター ---------- */
.site-footer {
  padding: 48px var(--page-x) 28px;
  background: var(--color-dark);
  color: var(--color-white);
}

.site-footer__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.site-logo--footer .site-logo__mark {
  border-color: var(--color-white);
}

.site-logo--footer .site-logo__sub {
  color: var(--color-dark-text);
}

.site-footer__pagetop {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: .2em;
  transition: color .2s;
}

.site-footer__pagetop:hover {
  color: var(--color-dark-text);
  text-decoration: underline;
  text-underline-offset: 5px;
}

.site-footer__bottom {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--color-dark-line);
  font-size: 11px;
  color: var(--color-dark-text);
}

.site-footer__bottom p + p {
  margin-top: 6px;
}

.site-footer__copy {
  font-family: var(--font-en);
  letter-spacing: .1em;
}

/* ---------- ダイアログ ---------- */
.demo-dialog {
  width: min(440px, calc(100% - 40px));
  padding: 32px;
  border: 1px solid var(--color-ink);
  background: var(--color-bg);
  color: var(--color-ink);
}

.demo-dialog::backdrop {
  background: rgba(20, 20, 20, .6);
}

.demo-dialog__title {
  font-size: 18px;
  font-weight: 500;
}

.demo-dialog__text {
  margin: 16px 0 24px;
  font-size: 13px;
}

.demo-dialog__close {
  padding: 10px 28px;
  background: transparent;
  border: 1px solid var(--color-ink);
  transition: background-color .2s, color .2s;
}

.demo-dialog__close:hover {
  background: var(--color-ink);
  color: var(--color-white);
}

/* =========================================================
   タブレット以上
   ========================================================= */
@media (min-width: 768px) {
  :root {
    --page-x: 40px;
  }

  .hero__title {
    font-size: 40px;
  }

  .work-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 56px 32px;
    align-items: start;
  }

  .process-list {
    grid-template-columns: repeat(2, 1fr);
    column-gap: 40px;
  }

  .media-list__item {
    grid-template-columns: 90px 64px 1fr;
    align-items: baseline;
  }

  .media-list__title {
    grid-column: auto;
  }
}

/* =========================================================
   PC（1024px以上）: 12カラムグリッド・左に見出し固定
   ========================================================= */
@media (min-width: 1024px) {
  :root {
    --page-x: 5vw;
    --header-h: 80px;
  }

  .u-pc-only {
    display: inline;
  }

  .menu-toggle {
    display: none;
  }

  .global-nav {
    display: block;
    position: static;
    padding: 0;
    background: none;
    border: 0;
  }

  .global-nav__list {
    display: flex;
    align-items: center;
    gap: 32px;
  }

  .global-nav__link {
    padding: 8px 0;
    border: 0;
    font-size: 13px;
  }

  .global-nav__link--contact {
    margin-top: 0;
    padding: 8px 22px;
    border: 1px solid var(--color-ink);
  }

  .global-nav__link--contact:hover {
    background: var(--color-ink);
    color: var(--color-white);
    text-decoration: none;
  }

  /* ヒーロー: 左4カラム=文字 / 右8カラム=写真 */
  .hero {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    column-gap: 32px;
    align-items: end;
    padding-top: 56px;
    padding-bottom: 72px;
  }

  .hero__text {
    grid-column: 1 / 6;
    grid-row: 1;
    padding-bottom: 64px;
  }

  .hero__title {
    font-size: clamp(34px, 2.9vw, 46px);
  }

  .hero__figure {
    grid-column: 6 / 13;
    grid-row: 1;
    margin-top: 0;
  }

  .hero__image {
    aspect-ratio: 16 / 10;
  }

  .hero__scroll {
    position: absolute;
    left: var(--page-x);
    bottom: 72px;
  }

  /* セクション: 左3カラム=見出し（追従） / 右9カラム=本文 */
  .section {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    column-gap: 32px;
    padding-top: 120px;
    padding-bottom: 120px;
  }

  .section-head {
    grid-column: 1 / 4;
    align-self: start;
    position: sticky;
    top: calc(var(--header-h) + 40px);
    margin-bottom: 0;
  }

  .section-head__num {
    font-size: 96px;
  }

  .philosophy__body,
  .works__body,
  .process__body,
  .media__body,
  .office__body {
    grid-column: 4 / 13;
  }

  .philosophy__catch {
    font-size: 36px;
  }

  .philosophy__text {
    max-width: 640px;
  }

  .principle-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    border-top: 0;
  }

  .principle-list__item {
    display: block;
    padding: 20px 0 0;
    border-top: 1px solid var(--color-ink);
    border-bottom: 0;
  }

  .principle-list__num {
    display: block;
    margin-bottom: 20px;
  }

  .principle-list__text {
    margin-top: 10px;
  }

  /* 作品: 9カラム内で大小を組み合わせる */
  .work-list {
    grid-template-columns: repeat(9, 1fr);
    gap: 72px 32px;
  }

  .work-card {
    grid-column: span 3;
  }

  .work-card--wide {
    grid-column: span 6;
  }

  .work-card--tall {
    grid-column: span 3;
  }

  .work-card__title {
    font-size: 18px;
  }

  .process-list {
    grid-template-columns: repeat(3, 1fr);
    column-gap: 32px;
  }

  .process-list__item {
    padding: 32px 0;
  }

  .office__body {
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    column-gap: 32px;
  }

  .office__figure {
    grid-column: 1 / 5;
  }

  .office-data {
    grid-column: 5 / 10;
    margin-top: 0;
  }

  .office-data__row {
    grid-template-columns: 100px 1fr;
  }

  .contact {
    padding-top: 140px;
    padding-bottom: 140px;
  }

  .contact__title {
    font-size: 36px;
  }

  .site-footer__bottom {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 32px;
  }

  .site-footer__bottom p + p {
    margin-top: 0;
  }
}

/* 動きを減らす設定: スクロール表示・スムーススクロールを止める */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .is-ready .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  /* 全要素の transition をまとめて無効化するため、例外として !important を使用 */
  *,
  *::before,
  *::after {
    transition: none !important;
  }
}