/* ============================================================
   布施金属工業（アルミ職人工房）Block Library — LIGHT variant
   Pattern②: ダーク×レッドアクセント
   ============================================================ */

:root {
  --fk-dark:    #1A1A2E;
  --fk-navy:    #16213E;
  --fk-primary: #0F3460;
  --fk-silver:  #6B7280;
  --fk-accent:  #E94560;
  --fk-warm:    #F5A623;
  --fk-light:   #FFF8F0;
  --fk-text:    #1F2937;
  --fk-muted:   #6B7280;
  --fk-border:  #E5E7EB;
  --fk-max-w:   1200px;
  --fk-py:      5rem;
  --fk-px:      1.25rem;
  --fk-radius:  1rem;
}
@media (min-width: 1024px) { :root { --fk-px: 2.5rem; } }

.fk-section { padding: var(--fk-py) var(--fk-px); }
.fk-section--white { background: #fff; }
.fk-section--light { background: var(--fk-light); }
.fk-section--dark  { background: var(--fk-dark); }
.fk-section--navy  { background: linear-gradient(135deg, #1A1A2E 0%, #16213E 60%, #0F3460 100%); }

.fk-inner { max-width: var(--fk-max-w); margin: 0 auto; }

.fk-section-header { margin-bottom: 3rem; }
.fk-eyebrow {
  display: flex; align-items: center; gap: 0.75rem;
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--fk-accent); margin-bottom: 1rem;
}
.fk-eyebrow::before { content: ''; display: block; width: 24px; height: 3px; background: currentColor; border-radius: 2px; flex-shrink: 0; }
.fk-eyebrow--light { color: #FCA5A5; }
.fk-section-title { font-size: clamp(1.75rem, 3vw, 2.5rem); font-weight: 900; line-height: 1.2; color: var(--fk-text); margin-bottom: 0.75rem; }
.fk-section-title--light { color: #fff; }
.fk-section-sub { font-size: 1rem; color: var(--fk-muted); line-height: 1.7; }
.fk-section-sub--light { color: #FCA5A5; }

.fk-btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.875rem 2rem; border-radius: 0.5rem; font-size: 0.9375rem; font-weight: 600;
  text-decoration: none; transition: background 0.2s, transform 0.15s; cursor: pointer; border: none;
}
.fk-btn--primary { background: var(--fk-accent); color: #fff; }
.fk-btn--primary:hover { background: #c73652; transform: translateY(-1px); }
.fk-btn--ghost { background: rgba(255,255,255,0.12); color: #fff; border: 1px solid rgba(255,255,255,0.3); }
.fk-btn--ghost:hover { background: rgba(255,255,255,0.2); }
.fk-btn--outline { background: transparent; color: var(--fk-accent); border: 1.5px solid var(--fk-accent); }
.fk-btn--outline:hover { background: #FFF0F3; }
.fk-btn--sm { padding: 0.5rem 1.25rem; font-size: 0.875rem; }
.fk-btn svg { width: 1rem; height: 1rem; flex-shrink: 0; }

.fk-hero {
  padding: 8rem var(--fk-px) 5rem;
  background: linear-gradient(135deg, #1A1A2E 0%, #16213E 60%, #0F3460 100%);
  position: relative; overflow: hidden;
}
.fk-hero::after {
  content: ''; position: absolute; right: -5rem; top: -5rem; width: 32rem; height: 32rem;
  background: radial-gradient(circle, rgba(233,69,96,0.18) 0%, transparent 70%); pointer-events: none;
}
.fk-hero--page { padding: 8rem var(--fk-px) 4rem; }
.fk-hero__inner { max-width: var(--fk-max-w); margin: 0 auto; position: relative; }
.fk-hero__bc { display: flex; align-items: center; gap: 0.5rem; font-size: 0.875rem; color: #9CA3AF; margin-bottom: 1.5rem; }
.fk-hero__bc a { color: inherit; text-decoration: none; }
.fk-hero__bc a:hover { color: #fff; }
.fk-hero__bc-sep { color: #4B5563; }
.fk-hero__title { font-size: clamp(2rem, 5vw, 3.25rem); font-weight: 900; color: #fff; line-height: 1.15; margin-bottom: 1.25rem; }
.fk-hero__sub { font-size: 1.125rem; color: #FCA5A5; font-weight: 300; letter-spacing: 0.05em; margin-bottom: 2.5rem; }
.fk-hero__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.fk-features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; margin-top: 3rem; }
.fk-feature-card { background: #fff; border: 1px solid var(--fk-border); border-radius: var(--fk-radius); padding: 2rem; box-shadow: 0 2px 12px rgba(0,0,0,0.04); }
.fk-feature-card--dark { background: rgba(255,255,255,0.05); border-color: rgba(255,255,255,0.1); }
.fk-feature-card__icon { width: 2.75rem; height: 2.75rem; background: var(--fk-accent); border-radius: 0.75rem; display: flex; align-items: center; justify-content: center; margin-bottom: 1.25rem; }
.fk-feature-card__icon svg { width: 1.25rem; height: 1.25rem; stroke: #fff; fill: none; }
.fk-feature-card__title { font-size: 1rem; font-weight: 700; color: var(--fk-text); margin-bottom: 0.5rem; }
.fk-feature-card--dark .fk-feature-card__title { color: #fff; }
.fk-feature-card__body { font-size: 0.875rem; color: var(--fk-muted); line-height: 1.7; }
.fk-feature-card--dark .fk-feature-card__body { color: #9CA3AF; }

.fk-product-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.5rem; margin-top: 3rem; }
.fk-product-card { display: block; background: #fff; border: 1px solid var(--fk-border); border-radius: var(--fk-radius); padding: 2rem; text-decoration: none; transition: box-shadow 0.2s, transform 0.2s; box-shadow: 0 2px 12px rgba(0,0,0,0.04); }
.fk-product-card:hover { box-shadow: 0 12px 32px rgba(233,69,96,0.12); transform: translateY(-3px); }
.fk-product-card__label { font-size: 0.6875rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fk-accent); margin-bottom: 0.75rem; }
.fk-product-card__title { font-size: 1.125rem; font-weight: 800; color: var(--fk-text); line-height: 1.4; margin-bottom: 0.625rem; }
.fk-product-card__body { font-size: 0.875rem; color: var(--fk-muted); line-height: 1.7; margin-bottom: 1.5rem; }
.fk-product-card__link { display: flex; align-items: center; gap: 0.25rem; font-size: 0.875rem; font-weight: 600; color: var(--fk-accent); }
.fk-product-card__link svg { width: 0.875rem; height: 0.875rem; }

.fk-detail { display: grid; grid-template-columns: 1fr; gap: 3rem; align-items: start; }
@media (min-width: 1024px) {
  .fk-detail { grid-template-columns: 1fr 1fr; }
  .fk-detail--reverse .fk-detail__text { order: 2; }
  .fk-detail--reverse .fk-detail__visual { order: 1; }
}
.fk-detail__title { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 900; color: var(--fk-text); line-height: 1.3; margin-bottom: 1.5rem; }
.fk-detail__body { font-size: 1rem; color: #4B5563; line-height: 1.85; margin-bottom: 1rem; }
.fk-list { list-style: none; padding: 0; margin: 1.25rem 0; display: flex; flex-direction: column; gap: 0.625rem; }
.fk-list li { display: flex; align-items: flex-start; gap: 0.625rem; font-size: 0.9375rem; color: #374151; line-height: 1.65; }
.fk-list li::before { content: '〇'; color: var(--fk-accent); font-weight: 700; flex-shrink: 0; }
.fk-list--check li::before { content: '✓'; color: #16A34A; }
.fk-detail__visual { background: var(--fk-light); border: 2px dashed #FECACA; border-radius: var(--fk-radius); aspect-ratio: 4 / 3; display: flex; align-items: center; justify-content: center; color: #9CA3AF; font-size: 0.875rem; }

.fk-flow { display: flex; flex-direction: column; gap: 0; margin-top: 3rem; max-width: 48rem; margin-left: auto; margin-right: auto; }
.fk-flow-step { display: flex; gap: 1.5rem; padding-bottom: 2rem; position: relative; }
.fk-flow-step:not(:last-child)::before { content: ''; position: absolute; left: 1.375rem; top: 2.75rem; bottom: 0; width: 2px; background: #FECACA; }
.fk-flow-step__num { flex-shrink: 0; width: 2.75rem; height: 2.75rem; background: var(--fk-accent); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 0.875rem; font-weight: 800; }
.fk-flow-step__content { padding-top: 0.375rem; }
.fk-flow-step__title { font-size: 1rem; font-weight: 700; color: var(--fk-text); margin-bottom: 0.375rem; }
.fk-flow-step__body { font-size: 0.875rem; color: var(--fk-muted); line-height: 1.7; }

.fk-cases-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.5rem; margin-top: 3rem; }
.fk-case-card { background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.12); border-radius: var(--fk-radius); padding: 2rem; }
.fk-case-card__no { font-size: 0.6875rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: #FCA5A5; margin-bottom: 0.75rem; }
.fk-case-card__title { font-size: 1.125rem; font-weight: 800; color: #fff; line-height: 1.4; margin-bottom: 0.875rem; }
.fk-case-card__body { font-size: 0.875rem; color: #9CA3AF; line-height: 1.7; margin-bottom: 1.25rem; }
.fk-case-card__chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.fk-case-card__chip { font-size: 0.6875rem; font-weight: 600; padding: 0.25rem 0.625rem; border-radius: 999px; background: rgba(233,69,96,0.25); color: #FCA5A5; }

.fk-faq { max-width: 48rem; margin: 3rem auto 0; }
.fk-faq-item { border-bottom: 1px solid var(--fk-border); }
.fk-faq-item summary { display: flex; justify-content: space-between; align-items: flex-start; padding: 1.25rem 0; cursor: pointer; list-style: none; gap: 1rem; }
.fk-faq-item summary::-webkit-details-marker { display: none; }
.fk-faq__q { font-size: 0.9375rem; font-weight: 700; color: var(--fk-text); line-height: 1.55; display: flex; gap: 0.75rem; }
.fk-faq__q::before { content: 'Q'; color: var(--fk-accent); font-weight: 900; flex-shrink: 0; }
.fk-faq__chevron { flex-shrink: 0; width: 1.25rem; height: 1.25rem; stroke: #9CA3AF; fill: none; transition: transform 0.2s; }
details[open] .fk-faq__chevron { transform: rotate(180deg); }
.fk-faq__a { padding: 0 0 1.25rem 1.75rem; font-size: 0.9375rem; color: #4B5563; line-height: 1.8; display: flex; gap: 0.75rem; }
.fk-faq__a::before { content: 'A'; color: #16A34A; font-weight: 900; flex-shrink: 0; }

.fk-company-table { width: 100%; border-collapse: collapse; }
.fk-company-table tr { border-bottom: 1px solid var(--fk-border); }
.fk-company-table th { text-align: left; width: 9rem; padding: 1rem 1.5rem 1rem 0; font-size: 0.875rem; font-weight: 700; color: var(--fk-text); vertical-align: top; white-space: nowrap; }
.fk-company-table td { padding: 1rem 0; font-size: 0.875rem; color: #4B5563; line-height: 1.75; }
@media (max-width: 640px) {
  .fk-company-table, .fk-company-table tbody, .fk-company-table tr, .fk-company-table th, .fk-company-table td { display: block; }
  .fk-company-table th { padding-bottom: 0.25rem; border-bottom: none; width: 100%; }
  .fk-company-table td { padding-top: 0; }
}

.fk-cta { padding: var(--fk-py) var(--fk-px); background: linear-gradient(135deg, #1A1A2E 0%, var(--fk-accent) 150%); text-align: center; }
.fk-cta__inner { max-width: 40rem; margin: 0 auto; }
.fk-cta__title { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 900; color: #fff; line-height: 1.3; margin-bottom: 1rem; }
.fk-cta__sub { font-size: 0.9375rem; color: #FCA5A5; line-height: 1.75; margin-bottom: 2rem; }
.fk-cta__actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 0.75rem; }

.fk-form label { display: block; font-size: 0.875rem; font-weight: 700; color: var(--fk-text); margin-bottom: 0.375rem; }
.fk-form input, .fk-form select, .fk-form textarea { width: 100%; padding: 0.75rem 1rem; border: 1px solid var(--fk-border); border-radius: 0.5rem; font-size: 0.9375rem; font-family: inherit; color: var(--fk-text); background: #fff; transition: border-color 0.15s; }
.fk-form input:focus, .fk-form select:focus, .fk-form textarea:focus { outline: none; border-color: var(--fk-accent); box-shadow: 0 0 0 3px rgba(233,69,96,0.12); }
.fk-form textarea { min-height: 10rem; resize: vertical; }
.fk-form__group { margin-bottom: 1.5rem; }
.fk-form__req { display: inline-block; font-size: 0.6875rem; font-weight: 700; color: #fff; background: #DC2626; padding: 0.1rem 0.375rem; border-radius: 0.25rem; margin-left: 0.375rem; vertical-align: middle; }

.fk-acl { width: 48px; height: 3px; background: var(--fk-accent); border-radius: 2px; }
.fk-lift { transition: transform 0.25s ease, box-shadow 0.25s ease; }
.fk-lift:hover { transform: translateY(-4px); box-shadow: 0 16px 48px rgba(233,69,96,0.12); }
.fk-tag { display: inline-block; font-size: 0.6875rem; font-weight: 700; padding: 0.2rem 0.625rem; border-radius: 999px; }
.fk-tag--blue { background: #DBEAFE; color: #1e40af; }
.fk-tag--green { background: #DCFCE7; color: #166534; }
.fk-tag--amber { background: #FEF3C7; color: #92400e; }
.fk-note { padding: 1rem 1.25rem; border-radius: 0.75rem; font-size: 0.875rem; line-height: 1.75; }
.fk-note--blue { background: #EFF6FF; border: 1px solid #BFDBFE; color: #1e40af; }
.fk-note--amber { background: #FFFBEB; border: 1px solid #FDE68A; color: #92400e; }
.fk-note--green { background: #F0FDF4; border: 1px solid #BBF7D0; color: #166534; }