/**
 * blog-wrapping-calc.css
 * 包装紙サイズ計算ブログ記事専用スタイル
 * 依存: blog-article-cta-system.css, wrap-lp.css (.tlp-calc)
 */

/* ─── Variables ─── */
:root {
  --bwc-green: #2E7D32;
  --bwc-green-dark: #1B5E20;
  --bwc-green-light: #4CAF50;
  --bwc-green-soft: #e8f5e9;
  --bwc-green-mist: #f1f8e9;
  --bwc-warm: #faf8f5;
  --bwc-text: #1e293b;
  --bwc-text-secondary: #475569;
  --bwc-text-light: #94a3b8;
  --bwc-border: #e2e8f0;
  --bwc-radius: 12px;
  --bwc-radius-sm: 8px;
  --bwc-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --bwc-shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --bwc-font: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

/* ─── CTA Variant: wrap (green theme) ─── */
.blog-cta-stack--wrap {
  --cta-bg-start: #e8f5e9;
  --cta-bg-end: #f1f8e9;
  --cta-border: #2E7D32;
  --cta-text: #1B5E20;
  --cta-muted: #2E7D32;
  --cta-primary-bg: #2E7D32;
  --cta-primary-text: #ffffff;
  --cta-secondary-bg: #ffffff;
  --cta-secondary-border: rgba(46, 125, 50, 0.2);
  --cta-secondary-text: #1B5E20;
}
.blog-cta-stack--wrap .blog-cta-stack__btn--primary:hover {
  background: #1B5E20;
}

/* ─── Hero Section ─── */
.bwc-hero {
  position: relative;
  background: linear-gradient(135deg, #1B5E20 0%, #2E7D32 40%, #43A047 100%);
  padding: 56px 40px 48px;
  margin: -15px -15px 40px;
  border-radius: var(--bwc-radius);
  overflow: hidden;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 48px;
}
.bwc-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(45deg, transparent, transparent 20px, rgba(255,255,255,0.02) 20px, rgba(255,255,255,0.02) 40px),
    repeating-linear-gradient(-45deg, transparent, transparent 20px, rgba(255,255,255,0.015) 20px, rgba(255,255,255,0.015) 40px);
  pointer-events: none;
}
.bwc-hero__text {
  position: relative;
  z-index: 1;
  flex: 1;
}
.bwc-hero__overline {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.8;
  margin-bottom: 10px;
  font-weight: 600;
}
.bwc-hero h2 {
  color: #fff;
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.35;
  margin: 0 0 12px;
  text-shadow: 0 1px 3px rgba(0,0,0,0.15);
}
.bwc-hero__sub {
  font-size: 1.05rem;
  opacity: 0.92;
  line-height: 1.7;
  margin: 0;
}
.bwc-hero__visual {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  width: 220px;
  height: 180px;
}

/* CSS Gift Box Illustration */
.bwc-gift-box {
  position: relative;
  width: 160px;
  height: 130px;
  margin: 20px auto 0;
}
.bwc-gift-box__body {
  position: absolute;
  bottom: 0;
  left: 20px;
  width: 120px;
  height: 80px;
  background: linear-gradient(135deg, #fff9c4, #fff59d);
  border-radius: 4px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}
.bwc-gift-box__lid {
  position: absolute;
  bottom: 78px;
  left: 14px;
  width: 132px;
  height: 24px;
  background: linear-gradient(135deg, #ffee58, #fdd835);
  border-radius: 4px 4px 2px 2px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.bwc-gift-box__ribbon-v {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: 0;
  width: 16px;
  height: 80px;
  background: linear-gradient(180deg, #ef5350, #e53935);
  border-radius: 2px;
}
.bwc-gift-box__ribbon-h {
  position: absolute;
  left: 20px;
  bottom: 32px;
  width: 120px;
  height: 16px;
  background: linear-gradient(90deg, #ef5350, #e53935);
  border-radius: 2px;
}
.bwc-gift-box__bow {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: 100px;
  width: 48px;
  height: 24px;
}
.bwc-gift-box__bow::before,
.bwc-gift-box__bow::after {
  content: '';
  position: absolute;
  top: 0;
  width: 22px;
  height: 22px;
  border-radius: 50% 50% 50% 0;
  background: #ef5350;
}
.bwc-gift-box__bow::before { left: 0; transform: rotate(-45deg); }
.bwc-gift-box__bow::after { right: 0; transform: rotate(45deg); border-radius: 50% 50% 0 50%; }

/* Paper outline around gift */
.bwc-gift-box__paper {
  position: absolute;
  top: -8px;
  left: -4px;
  right: -4px;
  bottom: -8px;
  border: 2px dashed rgba(255,255,255,0.5);
  border-radius: 6px;
}

/* Size labels on paper */
.bwc-gift-box__dim {
  position: absolute;
  font-size: 0.68rem;
  color: rgba(255,255,255,0.75);
  font-weight: 500;
  white-space: nowrap;
}
.bwc-gift-box__dim--w {
  bottom: -26px;
  left: 50%;
  transform: translateX(-50%);
}
.bwc-gift-box__dim--h {
  right: -40px;
  top: 50%;
  transform: translateY(-50%);
}

/* ─── Section Headers ─── */
.bwc-section-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 48px 0 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--bwc-green-soft);
}
.bwc-section-head__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bwc-green-soft);
  border-radius: 10px;
  color: var(--bwc-green);
  font-size: 1.1rem;
  flex-shrink: 0;
}
.bwc-section-head h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--bwc-text);
  margin: 0;
  line-height: 1.4;
}

/* ─── Formula Tables ─── */
.bwc-table-wrap {
  border-radius: var(--bwc-radius);
  overflow: hidden;
  box-shadow: var(--bwc-shadow);
  margin: 24px 0;
  border: 1px solid var(--bwc-border);
}
.bwc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  margin: 0;
}
.bwc-table thead th {
  background: var(--bwc-green);
  color: #fff;
  font-weight: 600;
  padding: 12px 16px;
  text-align: left;
  font-size: 0.88rem;
  letter-spacing: 0.02em;
  border: none;
}
.bwc-table tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--bwc-border);
  color: var(--bwc-text);
  line-height: 1.6;
}
.bwc-table tbody tr:nth-child(even) td {
  background: #f8faf8;
}
.bwc-table tbody tr:last-child td {
  border-bottom: none;
}
.bwc-table tbody tr:hover td {
  background: var(--bwc-green-soft);
}

/* ─── Calculation Example Card ─── */
.bwc-example {
  background: var(--bwc-warm);
  border: 1px solid var(--bwc-border);
  border-left: 4px solid var(--bwc-green);
  border-radius: var(--bwc-radius-sm);
  padding: 20px 24px;
  margin: 24px 0;
}
.bwc-example__title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--bwc-green-dark);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.bwc-example ul {
  margin: 0;
  padding-left: 20px;
}
.bwc-example li {
  margin-bottom: 6px;
  line-height: 1.7;
}
.bwc-example strong {
  color: var(--bwc-green-dark);
}

/* ─── Wrap Method Comparison Diagram ─── */
.bwc-methods {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin: 32px 0;
}
.bwc-method-card {
  background: #fff;
  border: 1px solid var(--bwc-border);
  border-radius: var(--bwc-radius);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--bwc-shadow);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.bwc-method-card:hover {
  box-shadow: var(--bwc-shadow-md);
  transform: translateY(-2px);
}
.bwc-method-card__label {
  font-size: 1rem;
  font-weight: 700;
  color: var(--bwc-text);
  margin-bottom: 16px;
}
.bwc-method-card__desc {
  font-size: 0.85rem;
  color: var(--bwc-text-secondary);
  margin-top: 14px;
  line-height: 1.65;
}

/* CSS diagram: Caramel wrapping */
.bwc-diagram-caramel {
  position: relative;
  width: 180px;
  height: 120px;
  margin: 0 auto;
}
.bwc-diagram-caramel__paper {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #e8f5e9, #c8e6c9);
  border: 2px solid var(--bwc-green-light);
  border-radius: 4px;
}
.bwc-diagram-caramel__box {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 54px;
  background: linear-gradient(135deg, #fff9c4, #fff59d);
  border: 2px solid #f9a825;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.68rem;
  color: #e65100;
  font-weight: 600;
}
/* Arrows indicating wrap direction */
.bwc-diagram-caramel__arrow {
  position: absolute;
  color: var(--bwc-green);
  font-size: 1.2rem;
}
.bwc-diagram-caramel__arrow--left { left: 6px; top: 50%; transform: translateY(-50%); }
.bwc-diagram-caramel__arrow--right { right: 6px; top: 50%; transform: translateY(-50%); }
.bwc-diagram-caramel__arrow--top { top: 4px; left: 50%; transform: translateX(-50%); }
.bwc-diagram-caramel__arrow--bottom { bottom: 4px; left: 50%; transform: translateX(-50%); }

/* CSS diagram: Department store wrapping */
.bwc-diagram-dept {
  position: relative;
  width: 140px;
  height: 140px;
  margin: 0 auto;
}
.bwc-diagram-dept__paper {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #e8f5e9, #c8e6c9);
  border: 2px solid var(--bwc-green-light);
  border-radius: 4px;
  transform: rotate(45deg);
}
.bwc-diagram-dept__box {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 64px;
  height: 44px;
  background: linear-gradient(135deg, #fff9c4, #fff59d);
  border: 2px solid #f9a825;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.68rem;
  color: #e65100;
  font-weight: 600;
  z-index: 1;
}

/* ─── Calculator Section ─── */
.bwc-calc-section {
  margin: 40px 0;
}
.bwc-calc-section .bwc-section-head {
  margin-bottom: 8px;
}
.bwc-calc-lead {
  font-size: 0.95rem;
  color: var(--bwc-text-secondary);
  margin-bottom: 20px;
  line-height: 1.7;
}

/* Calculator green theme override */
.bwc-calc-section .tlp-calc {
  --tlp-accent: #2E7D32;
  --tlp-accent-hover: #1B5E20;
  --tlp-accent-soft: rgba(46, 125, 50, 0.08);
  --tlp-bg-warm: #faf8f5;
  --tlp-border: #e2e8f0;
  --tlp-radius: 12px;
  --tlp-radius-sm: 8px;
  --tlp-text-secondary: #475569;
  --tlp-text-light: #94a3b8;
  --tlp-navy: #1e293b;
  --tlp-font: "Noto Sans JP", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bwc-warm);
  border: 1px solid var(--bwc-border);
  border-radius: var(--bwc-radius);
  padding: 28px;
}

/* ─── Size Comparison Visual ─── */
.bwc-sizes {
  margin: 32px 0;
}
.bwc-sizes__image {
  text-align: center;
  margin-bottom: 20px;
}
.bwc-sizes__image img {
  max-width: 640px;
  width: 100%;
  height: auto;
}
.bwc-sizes__bars {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  justify-content: center;
  padding: 20px 0;
}
.bwc-size-bar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.bwc-size-bar__rect {
  background: linear-gradient(180deg, var(--bwc-green-light), var(--bwc-green));
  border-radius: 4px 4px 0 0;
  transition: transform 0.2s ease;
  position: relative;
}
.bwc-size-bar:hover .bwc-size-bar__rect {
  transform: scaleY(1.05);
}
.bwc-size-bar__label {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--bwc-green-dark);
}
.bwc-size-bar__dim {
  font-size: 0.68rem;
  color: var(--bwc-text-light);
  white-space: nowrap;
}

/* ─── Ordering Flow ─── */
.bwc-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 28px 0;
}
.bwc-flow__step {
  background: #fff;
  border: 1px solid var(--bwc-border);
  border-radius: var(--bwc-radius);
  padding: 24px 16px;
  text-align: center;
  position: relative;
  box-shadow: var(--bwc-shadow);
}
.bwc-flow__step::after {
  content: '';
  position: absolute;
  right: -12px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-left: 8px solid var(--bwc-green-light);
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
}
.bwc-flow__step:last-child::after {
  display: none;
}
.bwc-flow__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--bwc-green), var(--bwc-green-light));
  color: #fff;
  border-radius: 50%;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.bwc-flow__icon {
  font-size: 1.5rem;
  color: var(--bwc-green);
  margin-bottom: 10px;
  display: block;
}
.bwc-flow__title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--bwc-text);
  margin-bottom: 6px;
}
.bwc-flow__desc {
  font-size: 0.78rem;
  color: var(--bwc-text-secondary);
  line-height: 1.55;
}

/* ─── Notice Box ─── */
.bwc-notice {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: #fff8e1;
  border: 1px solid #ffe082;
  border-radius: var(--bwc-radius-sm);
  padding: 16px 20px;
  margin: 20px 0;
}
.bwc-notice__icon {
  color: #f57f17;
  font-size: 1.1rem;
  flex-shrink: 0;
  margin-top: 2px;
}
.bwc-notice p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--bwc-text);
}

/* ─── FAQ (details/summary) ─── */
.bwc-faq {
  margin: 24px 0;
}
.bwc-faq__item {
  border: 1px solid var(--bwc-border);
  border-radius: var(--bwc-radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
  background: #fff;
  transition: box-shadow 0.2s ease;
}
.bwc-faq__item:hover {
  box-shadow: var(--bwc-shadow);
}
.bwc-faq__item[open] {
  box-shadow: var(--bwc-shadow);
  border-color: var(--bwc-green-light);
}
.bwc-faq__q {
  padding: 16px 20px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--bwc-text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: background 0.15s ease;
}
.bwc-faq__q::-webkit-details-marker { display: none; }
.bwc-faq__q::before {
  content: '\f055';
  font-family: 'Font Awesome 6 Pro', 'Font Awesome 6 Free';
  font-weight: 900;
  color: var(--bwc-green);
  font-size: 0.9rem;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}
.bwc-faq__item[open] .bwc-faq__q::before {
  content: '\f056';
  transform: rotate(180deg);
}
.bwc-faq__q:hover {
  background: var(--bwc-green-soft);
}
.bwc-faq__a {
  padding: 0 20px 16px 48px;
  font-size: 0.9rem;
  color: var(--bwc-text-secondary);
  line-height: 1.75;
}

/* ─── Related Articles ─── */
.bwc-related {
  background: var(--bwc-warm);
  border: 1px solid var(--bwc-border);
  border-radius: var(--bwc-radius);
  padding: 24px 28px;
  margin: 32px 0;
}
.bwc-related__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--bwc-text);
  margin: 0 0 16px;
}
.bwc-related__list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.bwc-related__list li {
  margin-bottom: 8px;
  padding-left: 18px;
  position: relative;
}
.bwc-related__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--bwc-green);
  border-radius: 50%;
}
.bwc-related__list a {
  color: var(--bwc-green-dark);
  text-decoration: none;
  font-size: 0.92rem;
  transition: color 0.15s ease;
}
.bwc-related__list a:hover {
  color: var(--bwc-green);
  text-decoration: underline;
}
.bwc-related__cta {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--bwc-border);
}
.bwc-related__cta a {
  color: var(--bwc-green);
  font-weight: 700;
  text-decoration: none;
  font-size: 0.92rem;
}
.bwc-related__cta a:hover {
  text-decoration: underline;
}

/* ─── Guide Cards ─── */
.bwc-guides {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 28px 0;
}
.bwc-guide-card {
  background: #fff;
  border: 1px solid var(--bwc-border);
  border-radius: var(--bwc-radius);
  padding: 28px 20px;
  text-align: center;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.bwc-guide-card:hover {
  box-shadow: var(--bwc-shadow-md);
  transform: translateY(-2px);
}
.bwc-guide-card__icon {
  font-size: 2rem;
  color: var(--bwc-green);
  margin-bottom: 14px;
}
.bwc-guide-card__title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--bwc-text);
  margin-bottom: 6px;
}
.bwc-guide-card__desc {
  font-size: 0.82rem;
  color: var(--bwc-text-secondary);
  margin-bottom: 16px;
}
.bwc-guide-card__btn {
  display: inline-block;
  background: var(--bwc-green);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 8px 22px;
  border-radius: 20px;
  text-decoration: none;
  transition: background 0.15s ease;
}
.bwc-guide-card__btn:hover {
  background: var(--bwc-green-dark);
  color: #fff;
  text-decoration: none;
}

/* ─── Responsive ─── */
@media (max-width: 991px) {
  .bwc-hero {
    flex-direction: column;
    gap: 24px;
    padding: 40px 28px 36px;
    text-align: center;
  }
  .bwc-hero__visual {
    width: 160px;
    height: 140px;
  }
  .bwc-gift-box {
    width: 120px;
    height: 100px;
    margin-top: 0;
  }
  .bwc-gift-box__body { width: 90px; height: 60px; left: 15px; }
  .bwc-gift-box__lid { width: 100px; height: 18px; left: 10px; bottom: 58px; }
  .bwc-gift-box__ribbon-v { width: 12px; height: 60px; }
  .bwc-gift-box__ribbon-h { width: 90px; height: 12px; left: 15px; bottom: 24px; }
  .bwc-gift-box__bow { bottom: 74px; width: 36px; height: 18px; }
  .bwc-gift-box__bow::before, .bwc-gift-box__bow::after { width: 16px; height: 16px; }
  .bwc-flow { grid-template-columns: repeat(2, 1fr); }
  .bwc-flow__step:nth-child(2)::after { display: none; }
  .bwc-guides { grid-template-columns: 1fr; }
}

@media (max-width: 767px) {
  .bwc-hero {
    padding: 32px 20px 28px;
    margin: -15px -15px 28px;
  }
  .bwc-hero h2 {
    font-size: 1.5rem;
  }
  .bwc-hero__visual {
    width: 140px;
    height: 120px;
  }
  .bwc-methods {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .bwc-flow {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .bwc-flow__step::after { display: none; }
  .bwc-section-head h2 { font-size: 1.25rem; }
  .bwc-table { font-size: 0.85rem; }
  .bwc-table thead th,
  .bwc-table tbody td { padding: 10px 12px; }
  .bwc-calc-section .tlp-calc { padding: 20px 16px; }
  .bwc-sizes__bars { gap: 8px; flex-wrap: wrap; }
  .bwc-guides { grid-template-columns: 1fr; gap: 12px; }
}