/* ==========================================================================
   建設資材カタログサイト — デザインシステム
   コンセプト：現場の「仕様書・図面」を思わせるカタログ index。
   ・素材色は現場の色（コンクリート紙・鉄骨紺・セーフティオレンジ／イエロー）
   ・寸法や価格などの実数値だけ等幅フォントで扱う（装飾ではなく実データ）
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Zen+Kaku+Gothic+New:wght@400;500;700;900&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  /* --- color tokens --- */
  --paper: #EDEAE2;      /* 背景：図面用紙／コンクリート */
  --paper-deep: #E3DFD3; /* 背景（濃淡差用） */
  --ink: #1C2B3A;        /* 鉄骨紺：見出し・本文の基本色 */
  --ink-soft: #3D4C59;   /* 本文グレー寄り */
  --steel: #5B6B77;      /* 補助テキスト・線 */
  --safety: #E4571B;     /* セーフティオレンジ：主要アクセント／CTA */
  --safety-deep: #C1450E;
  --caution: #F2B705;    /* セーフティイエロー：警戒帯モチーフ用の副アクセント */
  --line: #C9C2B0;       /* 用紙上のヘアライン */
  --line-deep: #B7AE99;
  --white: #FBFAF7;

  --font-display: 'Zen Kaku Gothic New', 'Hiragino Sans', sans-serif;
  --font-body: 'Zen Kaku Gothic New', 'Hiragino Sans', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 { font-family: var(--font-display); margin: 0; font-weight: 700; color: var(--ink); }

.wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.mono { font-family: var(--font-mono); }

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid var(--safety);
  outline-offset: 2px;
}

/* ==========================================================================
   ヘッダー
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 0;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.15rem;
  color: var(--ink);
  white-space: nowrap;
}

.brand__mark {
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--safety);
}

.brand__sub {
  font-size: 0.62rem;
  font-weight: 500;
  color: var(--steel);
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.92rem;
  font-weight: 500;
}

.site-nav a { border-bottom: 1px solid transparent; padding-bottom: 2px; }
.site-nav a:hover { border-color: var(--safety); color: var(--safety-deep); }

.header-actions { display: flex; align-items: center; gap: 14px; }

.quote-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--ink);
  color: var(--white);
  padding: 9px 16px;
  font-size: 0.85rem;
  font-weight: 700;
  border: 1px solid var(--ink);
  transition: background 0.15s ease;
}
.quote-pill:hover { background: var(--safety-deep); border-color: var(--safety-deep); }

.quote-pill__count {
  font-family: var(--font-mono);
  background: var(--safety);
  color: var(--white);
  min-width: 20px;
  height: 20px;
  padding: 0 5px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--ink);
  width: 40px;
  height: 36px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.nav-toggle span,
.nav-toggle::before,
.nav-toggle::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
}
.nav-toggle span { margin: 4px 0; }

@media (max-width: 860px) {
  .site-nav { position: absolute; left: 0; right: 0; top: 100%; background: var(--paper); border-bottom: 1px solid var(--line); flex-direction: column; align-items: flex-start; gap: 0; display: none; }
  .site-nav.is-open { display: flex; }
  .site-nav a { width: 100%; padding: 14px 24px; border-bottom: 1px solid var(--line); }
  .site-nav a:hover { border-bottom-color: var(--line); }
  .nav-toggle { display: flex; }
}

/* ==========================================================================
   ヒーロー：現物写真をパーツ図のように配置
   ========================================================================== */
.hero {
  padding: 64px 0 56px;
  border-bottom: 1px solid var(--line);
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--safety-deep);
  margin-bottom: 18px;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 2.9rem);
  line-height: 1.4;
  letter-spacing: -0.01em;
  max-width: 15ch;
}

.hero__lead {
  margin: 22px 0 0;
  max-width: 46ch;
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 26px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  border: 1px solid var(--ink);
  cursor: pointer;
  background: transparent;
}
.btn--primary { background: var(--safety); border-color: var(--safety); color: var(--white); }
.btn--primary:hover { background: var(--safety-deep); border-color: var(--safety-deep); }
.btn--ghost { color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--white); }
.btn--small { padding: 9px 16px; font-size: 0.82rem; }

.hero__stats {
  display: flex;
  gap: 36px;
  margin-top: 44px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.stat__num { font-family: var(--font-mono); font-size: 1.5rem; font-weight: 700; color: var(--ink); }
.stat__label { font-size: 0.78rem; color: var(--steel); margin-top: 4px; }

/* 写真モザイク */
.hero__mosaic {
  position: relative;
  min-height: 420px;
}

.mosaic-item {
  position: absolute;
  background: var(--white);
  border: 1px solid var(--line-deep);
  padding: 10px;
}
.mosaic-item img { width: 100%; height: 100%; object-fit: contain; aspect-ratio: 1/1; }

.mosaic-item--a { width: 46%; top: 0; left: 4%; z-index: 2; }
.mosaic-item--b { width: 34%; top: 6%; right: 0; transform: rotate(2deg); z-index: 1; }
.mosaic-item--c { width: 30%; bottom: 4%; left: 0; transform: rotate(-2deg); z-index: 1; }
.mosaic-item--d { width: 38%; bottom: 0; right: 8%; z-index: 2; }

.dim-tag {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--steel);
  background: var(--paper);
  padding: 2px 6px;
  border: 1px solid var(--line-deep);
  white-space: nowrap;
}
.dim-tag--1 { top: -10px; left: 30%; }
.dim-tag--2 { bottom: 18%; right: -4%; }
.dim-tag--3 { top: 42%; left: -6%; }

@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; gap: 40px; }
  .hero__mosaic { min-height: 300px; margin-top: 8px; }
  .hero__stats { flex-wrap: wrap; row-gap: 18px; }
}

/* ==========================================================================
   ご利用の流れ（本当に手順なので番号を使う）
   ========================================================================== */
.flow {
  padding: 64px 0;
  border-bottom: 1px solid var(--line);
}

.section-head { max-width: 60ch; margin-bottom: 40px; }
.section-head h2 { font-size: clamp(1.5rem, 2.6vw, 1.9rem); }
.section-head p { color: var(--steel); margin-top: 10px; font-size: 0.95rem; }

.flow__steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--line-deep);
}

.flow__step {
  padding: 30px 26px;
  border-right: 1px solid var(--line-deep);
  position: relative;
}
.flow__step:last-child { border-right: none; }

.flow__num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--safety-deep);
  display: block;
  margin-bottom: 14px;
}

.flow__step h3 { font-size: 1.05rem; margin-bottom: 8px; }
.flow__step p { margin: 0; color: var(--ink-soft); font-size: 0.9rem; }

@media (max-width: 760px) {
  .flow__steps { grid-template-columns: 1fr; }
  .flow__step { border-right: none; border-bottom: 1px solid var(--line-deep); }
  .flow__step:last-child { border-bottom: none; }
}

/* ==========================================================================
   カテゴリー・インデックス（カタログ目次のような一覧）
   ========================================================================== */
.cat-index { padding: 64px 0; border-bottom: 1px solid var(--line); }

.cat-row {
  display: grid;
  grid-template-columns: 96px auto 130px 28px;
  align-items: center;
  gap: 24px;
  padding: 20px 8px 20px 16px;
  border-top: 1px solid var(--line-deep);
  border-left: 4px solid transparent;
  transition: background 0.12s ease, border-color 0.12s ease;
}
.cat-index .cat-row:last-child { border-bottom: 1px solid var(--line-deep); }
.cat-row:hover { background: var(--paper-deep); border-left-color: var(--row-accent, var(--safety)); }

.cat-row__thumb {
  width: 96px;
  height: 72px;
  background: var(--white);
  border: 1px solid var(--line-deep);
  padding: 6px;
}
.cat-row__thumb img { width: 100%; height: 100%; object-fit: contain; }

.cat-row__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
}
.cat-row__desc { color: var(--steel); font-size: 0.85rem; margin-top: 5px; max-width: 56ch; }

.cat-row__count {
  font-family: var(--font-mono);
  font-size: 1rem;
  text-align: right;
  color: var(--ink-soft);
  white-space: nowrap;
}
.cat-row__count b { font-size: 1.3rem; color: var(--ink); font-weight: 700; }

.cat-row__arrow { font-size: 1.3rem; color: var(--safety); text-align: right; }

@media (max-width: 720px) {
  .cat-row { grid-template-columns: 64px 1fr 20px; grid-template-areas: "thumb name arrow" "thumb count arrow"; }
  .cat-row__thumb { grid-area: thumb; width: 64px; height: 56px; }
  .cat-row__name { grid-area: name; }
  .cat-row__desc { display: none; }
  .cat-row__count { grid-area: count; text-align: left; }
  .cat-row__arrow { grid-area: arrow; }
}

/* ==========================================================================
   注目商品 / 商品プレート
   ========================================================================== */
.picks { padding: 64px 0; border-bottom: 1px solid var(--line); }

.pick-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line-deep);
  border: 1px solid var(--line-deep);
}

.plate {
  background: var(--paper);
  padding: 18px;
  display: flex;
  flex-direction: column;
}

.plate__photo {
  aspect-ratio: 1 / 1;
  background: var(--white);
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  margin-bottom: 14px;
}
.plate__photo img { width: 100%; height: 100%; object-fit: contain; }

.plate__cat { font-size: 0.72rem; color: var(--steel); margin-bottom: 6px; }
.plate__name { font-size: 0.92rem; font-weight: 700; line-height: 1.5; flex-grow: 1; }
.plate__model { font-family: var(--font-mono); font-size: 0.72rem; color: var(--steel); margin-top: 8px; }

.plate__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.plate__price { font-family: var(--font-mono); font-weight: 700; font-size: 1.02rem; }
.plate__price small { font-family: var(--font-body); font-weight: 400; font-size: 0.68rem; color: var(--steel); display: block; }

.add-btn {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 700;
  background: none;
  border: 1px solid var(--ink);
  padding: 8px 12px;
  cursor: pointer;
  white-space: nowrap;
}
.add-btn:hover { background: var(--ink); color: var(--white); }
.add-btn.is-added { background: var(--safety); border-color: var(--safety); color: var(--white); }

@media (max-width: 960px) { .pick-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .pick-grid { grid-template-columns: 1fr; } }

.picks__more { margin-top: 28px; text-align: center; }

/* ==========================================================================
   選ばれる理由
   ========================================================================== */
.features { padding: 64px 0; border-bottom: 1px solid var(--line); }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.feature__index { font-family: var(--font-mono); color: var(--steel); font-size: 0.8rem; }
.feature h3 { font-size: 1.05rem; margin: 10px 0 8px; }
.feature p { color: var(--ink-soft); font-size: 0.9rem; margin: 0; }

@media (max-width: 760px) { .feature-grid { grid-template-columns: 1fr; gap: 32px; } }

/* ==========================================================================
   CTA帯
   ========================================================================== */
.cta-band {
  background: var(--ink);
  color: var(--white);
  padding: 56px 0;
  position: relative;
  overflow: hidden;
}

.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(135deg, var(--caution) 0 22px, var(--ink) 22px 44px);
  opacity: 0.06;
}

.cta-band__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.cta-band h2 { color: var(--white); font-size: 1.5rem; max-width: 26ch; }
.cta-band p { color: #C7CDD3; margin-top: 8px; font-size: 0.92rem; }
.cta-band .btn--primary { background: var(--safety); border-color: var(--safety); }

/* ==========================================================================
   フッター
   ========================================================================== */
.site-footer { padding: 48px 0 32px; }

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--line);
}

.footer-brand .brand { margin-bottom: 12px; }
.footer-brand p { color: var(--steel); font-size: 0.85rem; max-width: 34ch; }

.footer-col h4 { font-size: 0.82rem; color: var(--steel); margin-bottom: 14px; font-weight: 700; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; font-size: 0.88rem; }
.footer-col a:hover { color: var(--safety-deep); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 20px;
  font-size: 0.78rem;
  color: var(--steel);
}

@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr; } }

/* ==========================================================================
   商品一覧ページ：絞り込みUI
   ========================================================================== */
.product-browser { padding: 40px 0 80px; }

.browser__controls {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 8px;
}

.browser__search {
  width: 100%;
  padding: 14px 16px;
  font-size: 0.95rem;
  font-family: var(--font-body);
  border: 1px solid var(--line-deep);
  background: var(--white);
  color: var(--ink);
}
.browser__search::placeholder { color: var(--steel); }

.browser__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  background: var(--white);
  border: 1px solid var(--line-deep);
  color: var(--ink-soft);
  cursor: pointer;
}
.chip:hover { border-color: var(--ink); color: var(--ink); }
.chip.is-active { background: var(--ink); border-color: var(--ink); color: var(--white); }
.chip__count { font-size: 0.72rem; opacity: 0.75; }

.browser__result {
  font-size: 0.82rem;
  color: var(--steel);
  margin: 24px 0 16px;
}

.browser__grid.pick-grid { grid-template-columns: repeat(4, 1fr); margin-top: 0; }
.browser__item { display: block; }
.browser__item .plate { height: 100%; }
.browser__item.is-hidden { display: none; }

.browser__empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--steel);
  font-size: 0.92rem;
}

@media (max-width: 960px) { .browser__grid.pick-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .browser__grid.pick-grid { grid-template-columns: 1fr; } }

/* ==========================================================================
   見積もりリストページ
   ========================================================================== */
.quote-section { padding: 48px 0 96px; }

.quote-layout {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 48px;
  align-items: start;
}

.quote-list { display: flex; flex-direction: column; }

.quote-row {
  display: grid;
  grid-template-columns: 76px 1fr auto auto;
  align-items: center;
  gap: 18px;
  padding: 18px 4px;
  border-bottom: 1px solid var(--line);
}

.quote-row__photo {
  width: 76px;
  height: 76px;
  background: var(--white);
  border: 1px solid var(--line-deep);
  padding: 6px;
}
.quote-row__photo img { width: 100%; height: 100%; object-fit: contain; }

.quote-row__name { font-weight: 700; font-size: 0.92rem; line-height: 1.5; }
.quote-row__model { font-family: var(--font-mono); font-size: 0.72rem; color: var(--steel); margin-top: 4px; }

.quote-row__qty {
  display: flex;
  align-items: center;
  gap: 8px;
}
.quote-row__qty input {
  width: 56px;
  padding: 8px;
  text-align: center;
  font-family: var(--font-mono);
  border: 1px solid var(--line-deep);
  background: var(--white);
  color: var(--ink);
}

.quote-row__price { font-family: var(--font-mono); font-weight: 700; text-align: right; white-space: nowrap; }
.quote-row__remove {
  background: none;
  border: none;
  color: var(--steel);
  font-size: 0.78rem;
  text-decoration: underline;
  cursor: pointer;
  padding: 0;
}
.quote-row__remove:hover { color: var(--safety-deep); }

@media (max-width: 640px) {
  .quote-row { grid-template-columns: 60px 1fr; grid-template-areas: "photo name" "photo qty" "photo price"; row-gap: 8px; }
  .quote-row__photo { grid-area: photo; width: 60px; height: 60px; }
  .quote-row__name { grid-area: name; }
  .quote-row__qty { grid-area: qty; }
  .quote-row__price { grid-area: price; text-align: left; }
}

.quote-empty {
  padding: 64px 20px;
  text-align: center;
  border: 1px dashed var(--line-deep);
  color: var(--steel);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.quote-form {
  background: var(--white);
  border: 1px solid var(--line-deep);
  padding: 28px;
  position: sticky;
  top: 90px;
}
.quote-form h2 { font-size: 1.1rem; }
.quote-form__note { font-size: 0.8rem; color: var(--steel); margin: 10px 0 18px; }

.quote-total {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: 22px;
  font-size: 0.85rem;
}
.quote-total__num { font-size: 1.4rem; font-weight: 700; }

.form-field { margin-bottom: 16px; }
.form-field label { display: block; font-size: 0.82rem; font-weight: 700; margin-bottom: 6px; }
.form-field .req { color: var(--safety-deep); font-weight: 500; font-size: 0.72rem; }
.form-field input,
.form-field textarea {
  width: 100%;
  padding: 11px 12px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  border: 1px solid var(--line-deep);
  background: var(--paper);
  color: var(--ink);
  resize: vertical;
}

.quote-form__submit { width: 100%; justify-content: center; margin-top: 6px; }
.quote-form__fallback { font-size: 0.72rem; color: var(--steel); margin-top: 14px; line-height: 1.7; }

@media (max-width: 900px) {
  .quote-layout { grid-template-columns: 1fr; }
  .quote-form { position: static; }
}

/* ==========================================================================
   汎用：ページヘッダー（下層ページ用）
   ========================================================================== */
.page-header { padding: 48px 0 32px; border-bottom: 1px solid var(--line); }
.page-header h1 { font-size: clamp(1.6rem, 3vw, 2.1rem); }
.page-header p { color: var(--steel); margin-top: 10px; max-width: 60ch; }

.breadcrumb { font-size: 0.8rem; color: var(--steel); margin-bottom: 14px; }
.breadcrumb a:hover { color: var(--safety-deep); }