/*
Theme Name: 匠建工業 コーポレートテーマ (Takumi Koken)
Theme URI: https://example.com
Author: Antigravity
Description: Stitchのデザインを忠実にWordPress化した匠建工業公式テーマ。
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: takumi-koken
*/

/* ==========================================================================
   匠建工業 コーポレートサイト スタイルシート (style.css)
   ========================================================================== */

/* @layer の宣言 */
@layer reset, base, layout, components, utilities;

@layer reset {
  /* 簡易リセット */
  *, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html {
    -webkit-text-size-adjust: 100%;
    -moz-tab-size: 4;
    tab-size: 4;
    scroll-behavior: smooth;
  }

  body {
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

  img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
    height: auto;
  }

  input, button, textarea, select {
    font: inherit;
  }

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

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

@layer base {
  :root {
    /* ==========================================
       DESIGN.md 準拠のカラーシステム (HEX)
       ========================================== */
    --color-primary: #04162f;       /* Deep Navy (プライマリ) */
    --color-primary-container: #1a2b45;
    --color-secondary: #a23f00;     /* Burnt Orange (セカンダリ/アクセント) */
    --color-secondary-container: #fc7127;
    --color-surface: #fbf9f8;       /* Off-White (ベース背景) */
    --color-surface-dim: #dcd9d9;
    --color-surface-container: #f0eded;
    --color-on-surface: #1b1c1c;    /* Charcoal Gray (本文テキスト) */
    --color-on-surface-variant: #44474d; /* 補助テキスト */
    --color-outline: #75777e;
    --color-error: #ba1a1a;
    
    /* 既存クラスとのマッピング */
    --color-navy-dark: var(--color-primary);
    --color-navy-mid: var(--color-primary-container);
    --color-navy-light: #4e5f7c;
    --color-gold: var(--color-secondary);
    --color-gold-dark: #7c2e00;
    --color-gold-light: var(--color-secondary-container);
    
    --color-text-main: var(--color-on-surface);
    --color-text-muted: var(--color-on-surface-variant);
    --color-bg-white: #ffffff;
    --color-bg-snow: var(--color-surface);
    --color-bg-dark: var(--color-primary); /* ダークフッター用 */
    
    --color-border: var(--color-outline);
    --color-border-focus: var(--color-gold); /* フォーカスリング用 */
    
    /* ==========================================
       DESIGN.md 準拠のタイポグラフィ
       ========================================== */
    --font-sans: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-english: "Montserrat", sans-serif; /* Montserratを採用 */

    /* タイポグラフィススケール (clamp & DESIGN.md) */
    --font-size-xs: clamp(0.75rem, 0.7rem + 0.2vw, 0.875rem); /* 14px */
    --font-size-sm: clamp(0.875rem, 0.8rem + 0.3vw, 1rem);      /* 16px */
    --font-size-base: clamp(1rem, 0.95rem + 0.2vw, 1.125rem);  /* 16px-18px */
    --font-size-md: clamp(1.125rem, 1.05rem + 0.4vw, 1.35rem); /* 18px-24px */
    --font-size-lg: clamp(1.35rem, 1.25rem + 0.6vw, 1.75rem);  /* 24px-32px */
    --font-size-xl: clamp(1.75rem, 1.6rem + 1vw, 2.5rem);      /* 32px-48px */
    --font-size-xxl: clamp(2.25rem, 2rem + 2vw, 3.75rem);     /* 48px-64px */

    /* コンテナ最大幅 & 余白 (DESIGN.md spacing) */
    --container-max-width: 1280px;
    --container-padding: clamp(1rem, 0.8rem + 2vw, 2.5rem); /* margin-mobile/desktop 16px/40px に対応 */

    /* トランジション */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  }

  body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    color: var(--color-text-main);
    background-color: var(--color-bg-white);
  }

  /* フォーカスリングのカスタマイズ (アクセシビリティ) */
  *:focus-visible {
    outline: 3px solid var(--color-border-focus);
    outline-offset: 4px;
  }

  /* テキストの折り返し制御 */
  h1, h2, h3, h4, h5, h6 {
    color: var(--color-navy-dark);
    font-weight: 700;
    line-height: 1.4;
    text-wrap: balance;
  }

  p {
    text-wrap: pretty;
  }
}

/* Cross-Document View Transitions */
@media (prefers-reduced-motion: no-preference) {
  @view-transition {
    navigation: auto;
  }
}

@layer layout {
  .container {
    width: 100%;
    max-width: var(--container-max-width);
    margin-inline: auto;
    padding-inline: var(--container-padding);
  }

  .grid {
    display: grid;
    gap: clamp(1.5rem, 1rem + 2vw, 3rem);
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .grid-4 {
    grid-template-columns: 1fr;
  }

  @media (width >= 768px) {
    .grid-2 {
      grid-template-columns: repeat(2, 1fr);
    }
    .grid-3 {
      grid-template-columns: repeat(2, 1fr);
    }
    .grid-4 {
      grid-template-columns: repeat(2, 1fr);
    }
  }

  @media (width >= 1024px) {
    .grid-3 {
      grid-template-columns: repeat(3, 1fr);
    }
    .grid-4 {
      grid-template-columns: repeat(4, 1fr);
    }
  }

  /* ヘッダー */
  .header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgb(from var(--color-bg-white) r g b / 90%);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: background-color var(--transition-fast);
  }

  .header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
  }

  .header__logo {
    font-family: var(--font-english);
    font-size: var(--font-size-md);
    font-weight: 800;
    letter-spacing: 0.05em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-navy-dark);
  }

  .header__logo-symbol {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--color-navy-dark), var(--color-gold));
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  }

  .header__nav {
    display: none;
  }

  @media (width >= 1024px) {
    .header__nav {
      display: block;
    }
  }

  .header__nav-list {
    display: flex;
    gap: 1.5rem;
    align-items: center;
  }

  .header__nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-navy-dark);
    position: relative;
    padding: 0.5rem 0;
    transition: color var(--transition-fast);
  }

  .header__nav-link::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-gold);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-fast);
  }

  .header__nav-link:hover {
    color: var(--color-gold-dark);
  }

  .header__nav-link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
  }

  /* ボタン */
  .btn-cta-header {
    background-color: var(--color-gold);
    color: var(--color-navy-dark);
    font-weight: 700;
    padding: 0.75rem 1.25rem;
    border-radius: 4px;
    font-size: var(--font-size-xs);
    transition: background-color var(--transition-fast), transform var(--transition-fast);
  }

  .btn-cta-header:hover {
    background-color: var(--color-gold-dark);
    transform: translateY(-1px);
  }

  /* ハンバーガーメニュー */
  .menu-btn {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    z-index: 200;
  }

  @media (width >= 1024px) {
    .menu-btn {
      display: none;
    }
  }

  .menu-btn__line {
    width: 100%;
    height: 2px;
    background-color: var(--color-navy-dark);
    transition: transform var(--transition-fast), opacity var(--transition-fast);
  }

  /* ドロワーメニュー (SP用) */
  .drawer {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    height: calc(100vh - 80px);
    background-color: var(--color-bg-white);
    z-index: 90;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    overflow-y: auto;
    padding: 2rem var(--container-padding);
  }

  .drawer[data-state="open"] {
    transform: translateX(0);
  }

  .drawer__list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }

  .drawer__link {
    font-size: var(--font-size-md);
    font-weight: 700;
    color: var(--color-navy-dark);
    display: block;
    padding-block: 0.5rem;
    border-bottom: 1px solid var(--color-border);
  }

  .drawer__cta {
    margin-top: 2rem;
  }

  /* フッター */
  .footer {
    background-color: var(--color-bg-dark);
    color: oklch(85% 0.01 240);
    padding-block: clamp(3rem, 2rem + 4vw, 6rem) 2rem;
    border-top: 4px solid var(--color-gold);
  }

  .footer__logo {
    font-family: var(--font-english);
    font-size: var(--font-size-lg);
    font-weight: 800;
    color: var(--color-bg-white);
    margin-bottom: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
  }

  .footer__logo-symbol {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--color-bg-white), var(--color-gold));
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  }

  .footer__nav {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
  }

  .footer__nav-title {
    color: var(--color-bg-white);
    font-size: var(--font-size-sm);
    margin-bottom: 1rem;
    border-left: 3px solid var(--color-gold);
    padding-left: 0.5rem;
  }

  .footer__nav-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }

  .footer__nav-link {
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
  }

  .footer__nav-link:hover {
    color: var(--color-gold);
  }

  .footer__bottom {
    text-align: center;
    font-size: var(--font-size-xs);
    border-top: 1px solid oklch(30% 0.02 240);
    padding-top: 2rem;
    color: oklch(60% 0.01 240);
  }
}

@layer components {
  /* ヒーローセクション */
  .hero {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    background-color: var(--color-navy-dark);
    color: var(--color-bg-white);
    overflow: hidden;
  }

  .hero__bg {
    position: absolute;
    inset: 0;
    z-index: 1;
  }

  .hero__bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.45;
  }

  .hero__bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, rgb(from var(--color-navy-dark) r g b / 90%) 30%, transparent 100%);
  }

  .hero__inner {
    position: relative;
    z-index: 2;
    padding-block: 4rem;
    max-width: 800px;
  }

  .hero__subtitle {
    font-family: var(--font-english);
    font-weight: 700;
    font-size: var(--font-size-md);
    color: var(--color-gold);
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    text-transform: uppercase;
  }

  .hero__title {
    font-size: var(--font-size-xxl);
    color: var(--color-bg-white);
    margin-bottom: 1.5rem;
    font-weight: 900;
    line-height: 1.2;
  }

  .hero__title span {
    display: block;
    font-size: 0.6em;
    color: var(--color-gold);
    font-weight: 700;
    margin-bottom: 0.5rem;
  }

  .hero__desc {
    font-size: var(--font-size-md);
    margin-bottom: 2.5rem;
    color: oklch(90% 0.01 240);
  }

  /* セクション共通 */
  .section {
    padding-block: clamp(4rem, 3rem + 6vw, 8rem);
  }

  .section--bg-snow {
    background-color: var(--color-bg-snow);
  }

  .section-header {
    text-align: center;
    margin-bottom: clamp(3rem, 2rem + 4vw, 5rem);
  }

  .section-header__en {
    font-family: var(--font-english);
    color: var(--color-gold-dark);
    font-weight: 700;
    font-size: var(--font-size-sm);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
  }

  .section-header__title {
    font-size: var(--font-size-lg);
    font-weight: 800;
    position: relative;
    display: inline-block;
    padding-bottom: 1rem;
  }

  .section-header__title::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: var(--color-gold);
  }

  /* ボタン */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    font-weight: 700;
    padding: 1rem 2.5rem;
    border-radius: 4px;
    transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
    cursor: pointer;
    border: none;
    font-size: var(--font-size-base);
  }

  .btn--primary {
    background-color: var(--color-gold);
    color: var(--color-navy-dark);
    box-shadow: 0 4px 14px rgb(from var(--color-gold) r g b / 30%);
  }

  .btn--primary:hover {
    background-color: var(--color-gold-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgb(from var(--color-gold) r g b / 40%);
  }

  .btn--secondary {
    background-color: var(--color-navy-dark);
    color: var(--color-bg-white);
    box-shadow: 0 4px 14px rgb(from var(--color-navy-dark) r g b / 20%);
  }

  .btn--secondary:hover {
    background-color: var(--color-navy-mid);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgb(from var(--color-navy-dark) r g b / 30%);
  }

  .btn--outline {
    background-color: transparent;
    border: 2px solid var(--color-navy-dark);
    color: var(--color-navy-dark);
  }

  .btn--outline:hover {
    background-color: var(--color-navy-dark);
    color: var(--color-bg-white);
    transform: translateY(-2px);
  }

  /* カードコンポーネント */
  .card {
    background-color: var(--color-bg-white);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  }

  .card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px oklch(0% 0 0 / 8%);
  }

  .card__img {
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background-color: var(--color-navy-dark);
  }

  .card__img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
  }

  .card:hover .card__img img {
    transform: scale(1.08);
  }

  .card__body {
    padding: 2rem;
  }

  .card__tag {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: 700;
    background-color: var(--color-bg-snow);
    color: var(--color-navy-mid);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    margin-bottom: 1rem;
  }

  .card__title {
    font-size: var(--font-size-md);
    margin-bottom: 0.75rem;
  }

  .card__desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
    line-height: 1.6;
  }

  .card__link {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-navy-light);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
  }

  .card__link::after {
    content: "→";
    transition: transform var(--transition-fast);
  }

  .card:hover .card__link::after {
    transform: translateX(4px);
  }

  /* 施工実績用特化カード */
  .works-card {
    display: grid;
    grid-template-columns: 1fr;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
    background-color: var(--color-bg-white);
  }

  @media (width >= 768px) {
    .works-card {
      grid-template-columns: 4fr 6fr;
    }
  }

  .works-card__img {
    position: relative;
    aspect-ratio: 4 / 3;
    overflow: hidden;
  }

  @media (width >= 768px) {
    .works-card__img {
      aspect-ratio: auto;
      height: 100%;
    }
  }

  .works-card__img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .works-card__label {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background-color: var(--color-gold);
    color: var(--color-navy-dark);
    font-weight: 700;
    font-size: var(--font-size-xs);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
  }

  .works-card__body {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .works-card__meta {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
  }

  .works-card__title {
    font-size: var(--font-size-md);
    margin-bottom: 1rem;
  }

  .works-card__details {
    margin-top: auto;
    font-size: var(--font-size-sm);
    border-top: 1px solid var(--color-border);
    padding-top: 1rem;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .works-card__detail-item span {
    display: block;
    color: var(--color-text-muted);
    font-size: 0.85em;
  }

  .works-card__detail-item strong {
    color: var(--color-navy-dark);
    font-size: 1.1em;
  }

  /* アコーディオン (FAQなど) */
  .accordion-item {
    border-bottom: 1px solid var(--color-border);
  }

  .accordion-summary {
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
    font-weight: 700;
    font-size: var(--font-size-md);
    cursor: pointer;
  }

  .accordion-summary::-webkit-details-marker {
    display: none;
  }

  .accordion-summary::after {
    content: "+";
    font-size: 1.5rem;
    color: var(--color-gold-dark);
    transition: transform var(--transition-fast);
  }

  details[open] .accordion-summary::after {
    transform: rotate(45deg);
  }

  .accordion-content {
    padding-bottom: 1.5rem;
    color: var(--color-text-muted);
  }

  /* テーブルスタイル */
  .table {
    width: 100%;
    border-collapse: collapse;
    margin-block: 1.5rem;
  }

  .table th, .table td {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
    text-align: left;
  }

  .table th {
    background-color: var(--color-bg-snow);
    color: var(--color-navy-dark);
    font-weight: 700;
    width: 25%;
  }

  @media (width < 640px) {
    .table, .table tbody, .table tr, .table th, .table td {
      display: block;
      width: 100%;
    }
    .table th {
      border-bottom: none;
      padding-bottom: 0.25rem;
    }
    .table td {
      padding-top: 0.25rem;
    }
  }

  /* お問い合わせフォーム */
  .form {
    display: grid;
    gap: 1.5rem;
    background-color: var(--color-bg-white);
    padding: clamp(2rem, 1rem + 3vw, 4rem);
    border-radius: 8px;
    border: 1px solid var(--color-border);
    box-shadow: 0 4px 20px oklch(0% 0 0 / 4%);
  }

  .form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .form-label {
    font-weight: 700;
    font-size: var(--font-size-sm);
    color: var(--color-navy-dark);
  }

  .form-label span {
    background-color: oklch(50% 0.18 25);
    color: var(--color-bg-white);
    padding: 0.1rem 0.4rem;
    font-size: 0.75em;
    border-radius: 3px;
    margin-left: 0.5rem;
  }

  .form-control {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background-color: var(--color-bg-snow);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  }

  .form-control:focus {
    outline: none;
    border-color: var(--color-gold);
    box-shadow: 0 0 0 3px rgb(from var(--color-gold) r g b / 20%);
    background-color: var(--color-bg-white);
  }

  /* ユーザーが触った後のエラー表示 (:user-invalid) */
  .form-control:user-invalid {
    border-color: oklch(50% 0.18 25);
    background-color: oklch(98% 0.01 25);
  }

  /* パンくずリスト */
  .breadcrumbs {
    background-color: var(--color-bg-snow);
    padding-block: 1rem;
    border-bottom: 1px solid var(--color-border);
    font-size: var(--font-size-xs);
  }

  .breadcrumbs__list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
  }

  .breadcrumbs__item:not(:last-child)::after {
    content: "/";
    margin-left: 0.5rem;
    color: var(--color-text-muted);
  }

  .breadcrumbs__link {
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
  }

  .breadcrumbs__link:hover {
    color: var(--color-navy-light);
  }

  .breadcrumbs__item--current {
    color: var(--color-navy-dark);
    font-weight: 500;
  }

  /* 下層ページのヒーロー */
  .page-header {
    background-color: var(--color-navy-dark);
    color: var(--color-bg-white);
    padding-block: clamp(3rem, 2rem + 6vw, 6rem);
    text-align: center;
    position: relative;
    overflow: hidden;
  }

  .page-header::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 70% 30%, rgb(from var(--color-gold) r g b / 15%), transparent 70%);
  }

  .page-header__inner {
    position: relative;
    z-index: 2;
  }

  .page-header__title {
    font-size: var(--font-size-xl);
    color: var(--color-bg-white);
    margin-bottom: 0.5rem;
    font-weight: 800;
  }

  .page-header__en {
    font-family: var(--font-english);
    color: var(--color-gold);
    font-weight: 700;
    font-size: var(--font-size-sm);
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }
}

@layer utilities {
  .text-center { text-align: center; }
  .text-right { text-align: right; }
  .mt-1 { margin-top: 0.5rem; }
  .mt-2 { margin-top: 1rem; }
  .mt-3 { margin-top: 1.5rem; }
  .mt-4 { margin-top: 2rem; }
  .mt-6 { margin-top: 3rem; }
  
  .color-muted { color: var(--color-text-muted); }
  .font-english { font-family: var(--font-english); }
  
  .visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
}