/* ============================================
   栃杜建設 施工事例詳細 — Stylesheet
   Design: LP本体のデザイントークンを継承
   ============================================ */

/* -----------------------------------------------
   DESIGN TOKENS (LP本体と統一)
   ----------------------------------------------- */
:root {
  --color-primary:       #1B4332;
  --color-primary-light: #2D6A4F;
  --color-primary-tint:  #E8F5E9;
  --color-secondary:     #2C2C2C;
  --color-neutral:       #8C8C8C;
  --color-bg:            #F5F3EF;
  --color-card:          #FFFFFF;
  --color-accent:        #607D8B;
  --color-accent-tint:   #E3EDF2;
  --color-warm:          #8B6F47;
  --color-warm-tint:     #F5EDE0;
  --color-border:        #E0DDD7;
  --color-text:          #1A1A1A;
  --color-text-sub:      #5C5C5C;
  --color-text-light:    #8A8A8A;
  --max-width:           1200px;
  --section-py:          100px;
  --header-h:            72px;
  --content-px:          48px;
  --radius-sm:  8px;
  --radius-md:  12px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-pill: 999px;
  --shadow-card:       0 4px 24px rgba(11, 22, 40, 0.04);
  --shadow-card-hover: 0 8px 32px rgba(11, 22, 40, 0.10);
  --shadow-header:     0 2px 12px rgba(0, 0, 0, 0.04);
  --ease-out:      cubic-bezier(0.22, 1, 0.36, 1);
  --duration:      0.6s;
}


/* -----------------------------------------------
   RESET & BASE
   ----------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 17px;
  line-height: 1.8;
  letter-spacing: 0.02em;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol { list-style: none; }

.sp-only  { display: none; }
.pc-only  { display: inline; }


/* -----------------------------------------------
   SHARED COMPONENTS (LP本体と同じ)
   ----------------------------------------------- */
.section-label {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section-accent-line {
  width: 56px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 2px;
  margin-bottom: 20px;
}

.section-heading {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0.02em;
  color: var(--color-text);
  margin-bottom: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-pill);
  padding: 16px 36px;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  transition: all 0.35s var(--ease-out);
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-card);
}
.btn--primary:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(27, 67, 50, 0.3);
}

.text-link {
  color: var(--color-primary);
  font-weight: 500;
  font-size: 15px;
  transition: opacity 0.2s;
}
.text-link:hover { opacity: 0.7; }
.text-link--light { color: rgba(255, 255, 255, 0.6); }
.text-link--light:hover { color: rgba(255, 255, 255, 0.9); opacity: 1; }
.text-link--dark { color: var(--color-text-sub); }


/* -----------------------------------------------
   HEADER (LP本体と統一)
   ----------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-header);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-px);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  display: flex;
  flex-direction: column;
  gap: 0;
  flex-shrink: 0;
}
.header__logo-main {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.08em;
  line-height: 1.2;
}
.header__logo-sub {
  font-size: 9px;
  font-weight: 500;
  color: var(--color-neutral);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.header__link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-sub);
  transition: color 0.2s;
  white-space: nowrap;
}
.header__link:hover {
  color: var(--color-primary);
}
.header__link--cta {
  background: var(--color-primary);
  color: var(--color-card) !important;
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  transition: background 0.2s;
}
.header__link--cta:hover {
  background: var(--color-primary-light);
}

.header__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}
.header__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-secondary);
  border-radius: 1px;
  transition: all 0.3s ease;
}
.header__hamburger.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.header__hamburger.is-active span:nth-child(2) { opacity: 0; }
.header__hamburger.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }


/* -----------------------------------------------
   BREADCRUMB
   ----------------------------------------------- */
.breadcrumb {
  padding-top: calc(var(--header-h) + 20px);
  background: var(--color-bg);
}
.breadcrumb__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-px);
  font-size: 13px;
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.breadcrumb__inner a {
  color: var(--color-text-sub);
  transition: color 0.2s;
}
.breadcrumb__inner a:hover {
  color: var(--color-primary);
}
.breadcrumb__inner span[aria-current] {
  color: var(--color-text);
  font-weight: 500;
}


/* -----------------------------------------------
   WORK HERO
   ----------------------------------------------- */
.work-hero {
  padding: 24px 0 0;
  background: var(--color-bg);
}

.work-hero__img {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-px);
}
.work-hero__img img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.08);
}

.work-hero__body {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px var(--content-px) 0;
}

.work-hero__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}
.work-hero__cat {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-primary-light);
  background: var(--color-primary-tint);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
}
.work-hero__type {
  font-size: 13px;
  color: var(--color-text-sub);
  font-weight: 500;
}

.work-hero__title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0.02em;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.work-hero__lead {
  font-size: 16px;
  line-height: 1.9;
  color: var(--color-text-sub);
  max-width: 720px;
}


/* -----------------------------------------------
   WORK SUMMARY
   ----------------------------------------------- */
.work-summary {
  padding: var(--section-py) 0;
  background: var(--color-bg);
}

.work-summary__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-px);
  display: flex;
  gap: 64px;
  align-items: flex-start;
}

.work-summary__text {
  flex: 0 0 40%;
}

.work-summary__lead {
  font-size: 15px;
  line-height: 1.9;
  color: var(--color-text-sub);
}

.work-summary__table {
  flex: 1;
}

.work-summary__table table {
  width: 100%;
  border-collapse: collapse;
}
.work-summary__table th,
.work-summary__table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  font-size: 15px;
  line-height: 1.7;
  vertical-align: top;
}
.work-summary__table th {
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
  width: 120px;
  background: rgba(232, 245, 233, 0.3);
}
.work-summary__table td {
  color: var(--color-text);
}
.work-summary__table tr:last-child th,
.work-summary__table tr:last-child td {
  border-bottom: none;
}


/* -----------------------------------------------
   WORK SECTIONS (Before / Planning / Construction / Detail)
   ----------------------------------------------- */
.work-section {
  padding: var(--section-py) 0;
  background: var(--color-bg);
}
.work-section--light {
  background: var(--color-card);
}

.work-section__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-px);
}

.work-section__header {
  max-width: 800px;
  margin-bottom: 48px;
}

.work-section__step {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-card);
  background: var(--color-primary);
  padding: 4px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 20px;
}

.work-section__body-text {
  font-size: 16px;
  line-height: 2;
  color: var(--color-text-sub);
}


/* -----------------------------------------------
   WORK PHOTOS
   ----------------------------------------------- */
.work-photos {
  display: grid;
  gap: 24px;
  margin-bottom: 48px;
}
.work-photos--single {
  grid-template-columns: 1fr;
  max-width: 900px;
}
.work-photos--two {
  grid-template-columns: repeat(2, 1fr);
}

.work-photo {
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  background: var(--color-card);
}
.work-photo img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out);
}
.work-photo:hover img {
  transform: scale(1.03);
}
.work-photo figcaption {
  padding: 16px 20px;
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.6;
  border-top: 1px solid var(--color-border);
}


/* -----------------------------------------------
   WORK ISSUES
   ----------------------------------------------- */
.work-issues {
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  padding: 36px 40px;
  border: 1px solid var(--color-border);
}
.work-section--light .work-issues {
  background: var(--color-primary-tint);
  border-color: transparent;
}

.work-issues__heading {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.work-issues__list li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  color: var(--color-text-sub);
  line-height: 1.8;
  margin-bottom: 4px;
}
.work-issues__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.4;
}


/* -----------------------------------------------
   WORK RESULT
   ----------------------------------------------- */
.work-result {
  padding: var(--section-py) 0;
  background: var(--color-card);
}

.work-result__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-px);
}

.work-result__header {
  max-width: 800px;
  margin-bottom: 48px;
}

.work-result__photo {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.08);
}
.work-result__photo img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}


/* -----------------------------------------------
   WORK CTA
   ----------------------------------------------- */
.work-cta {
  padding: var(--section-py) 0;
  background: var(--color-secondary);
  color: var(--color-card);
}

.work-cta__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-px);
  text-align: center;
}

.work-cta__heading {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 16px;
}

.work-cta__lead {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.9;
  margin-bottom: 40px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.work-cta__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
}


/* -----------------------------------------------
   SAMPLE NOTE (LP本体と統一)
   ----------------------------------------------- */
.sample-note {
  padding: 40px 0;
  background: #ECEAE6;
}
.sample-note__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-px);
  text-align: center;
}
.sample-note__badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-neutral);
  background: var(--color-card);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
}
.sample-note__text {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.7;
}


/* -----------------------------------------------
   FOOTER (LP本体と統一)
   ----------------------------------------------- */
.footer {
  padding: 56px 0 40px;
  background: var(--color-secondary);
}
.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-px);
}
.footer__main {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 24px;
}
.footer__brand-col { flex: 0 0 auto; }
.footer__logo {
  font-size: 20px;
  font-weight: 700;
  color: rgba(255,255,255,0.85);
  letter-spacing: 0.08em;
  display: block;
}
.footer__logo-en {
  display: block;
  font-size: 10px;
  color: rgba(255,255,255,0.3);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-top: 4px;
}
.footer__tagline {
  font-size: 13px;
  color: rgba(255,255,255,0.4);
  line-height: 1.7;
  margin-top: 16px;
}
.footer__nav {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
}
.footer__nav a {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  transition: color 0.3s;
}
.footer__nav a:hover { color: rgba(255,255,255,0.85); }
.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer__copy {
  font-size: 12px;
  color: rgba(255,255,255,0.3);
}
.footer__credit {
  font-size: 12px;
  color: rgba(255,255,255,0.2);
}


/* ===============================================
   RESPONSIVE — TABLET (max-width: 1024px)
   =============================================== */
@media (max-width: 1024px) {
  :root {
    --content-px: 32px;
  }

  .work-summary__inner {
    gap: 40px;
  }

  .work-hero__title {
    font-size: 30px;
  }
}


/* ===============================================
   RESPONSIVE — MOBILE (max-width: 768px)
   =============================================== */
@media (max-width: 768px) {
  :root {
    --section-py: 64px;
    --content-px: 20px;
  }

  body { font-size: 16px; }

  .sp-only  { display: inline; }
  .pc-only  { display: none; }

  .section-heading { font-size: 24px; }

  /* Header */
  .header__nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.98);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 28px;
    transform: translateX(100%);
    transition: transform 0.35s var(--ease-out);
    z-index: 999;
  }
  .header__nav.is-open { transform: translateX(0); }
  .header__link { font-size: 18px; }
  .header__link--cta { font-size: 16px; padding: 12px 32px; }
  .header__hamburger { display: flex; }

  /* Breadcrumb */
  .breadcrumb { padding-top: calc(var(--header-h) + 12px); }
  .breadcrumb__inner { font-size: 12px; }

  /* Hero */
  .work-hero__img img {
    border-radius: var(--radius-lg);
    aspect-ratio: 16 / 10;
  }
  .work-hero__title { font-size: 24px; }
  .work-hero__lead { font-size: 14px; }
  .work-hero__body { padding-top: 28px; }

  /* Summary */
  .work-summary__inner {
    flex-direction: column;
    gap: 32px;
  }
  .work-summary__text { flex: none; }
  .work-summary__table th { width: 100px; font-size: 13px; }
  .work-summary__table td { font-size: 14px; }

  /* Photos */
  .work-photos--two {
    grid-template-columns: 1fr;
  }

  /* Section */
  .work-section__body-text { font-size: 15px; }

  /* Issues */
  .work-issues {
    padding: 24px;
  }

  /* Result */
  .work-result__photo {
    border-radius: var(--radius-lg);
  }

  /* CTA */
  .work-cta__heading { font-size: 24px; }
  .work-cta__lead { font-size: 14px; }
  .work-cta__actions {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }

  /* Footer */
  .footer__main {
    flex-direction: column;
    gap: 32px;
  }
  .footer__nav { gap: 16px 24px; }
  .footer__bottom {
    flex-direction: column;
    gap: 4px;
    text-align: center;
  }
}


/* ===============================================
   RESPONSIVE — SMALL MOBILE (max-width: 480px)
   =============================================== */
@media (max-width: 480px) {
  .work-hero__title { font-size: 22px; }
  .section-heading { font-size: 22px; }
  .work-cta__heading { font-size: 22px; }

  .work-summary__table th,
  .work-summary__table td {
    display: block;
    width: 100%;
    padding: 8px 16px;
  }
  .work-summary__table th {
    border-bottom: none;
    padding-bottom: 0;
  }
  .work-summary__table td {
    padding-top: 4px;
  }
}


/* -----------------------------------------------
   REDUCED MOTION
   ----------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .work-photo img { transition: none; }
}