/* ============================================
   VB Ad Design System — Site CSS
   サイト共通レイアウト・ナビゲーション・章スタイル
   ============================================ */

@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;600&display=swap");

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--vb-font-family-base);
  font-size: var(--vb-font-size-base);
  font-weight: var(--vb-font-weight-regular);
  line-height: var(--vb-line-height-base);
  color: var(--vb-color-text-primary);
  background: var(--vb-color-base-white);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--vb-color-brand); }

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

ul, ol { list-style: none; }

/* ============================================
   HEADER
   ============================================ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--vb-color-base-white);
  border-bottom: 1px solid var(--vb-color-gray-100);
  height: var(--vb-header-height);
}

.site-header__inner {
  max-width: 1280px; margin: 0 auto;
  height: 100%; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
}

.site-header__logo {
  display: flex; align-items: center; gap: 12px;
  font-weight: var(--vb-font-weight-bold); font-size: 16px;
}
.site-header__logo img { height: 16px; width: auto; }
.site-header__logo small {
  font-weight: var(--vb-font-weight-regular);
  font-size: 12px; color: var(--vb-color-text-secondary);
}

.site-header__nav { display: flex; gap: 24px; }
.site-header__nav a {
  font-size: 14px; color: var(--vb-color-text-secondary);
  border-bottom: 2px solid transparent;
  padding: 4px 0; transition: color .15s;
}
.site-header__nav a:hover,
.site-header__nav a.is-active {
  color: var(--vb-color-text-primary);
  border-bottom-color: var(--vb-color-brand);
}

/* ============================================
   HERO
   ============================================ */
.hero {
  padding: 96px 24px; max-width: 1280px; margin: 0 auto;
}
.hero__eyebrow {
  font-size: 12px; font-weight: var(--vb-font-weight-bold);
  letter-spacing: 2px; text-transform: uppercase;
  color: var(--vb-color-text-secondary); margin-bottom: 16px;
}
.hero__title {
  font-size: 60px; font-weight: var(--vb-font-weight-regular);
  line-height: 1.2; margin-bottom: 24px; letter-spacing: -1px;
}
.hero__lead {
  font-size: 18px; max-width: 720px; color: var(--vb-color-text-secondary);
}

/* ============================================
   SECTION
   ============================================ */
.section {
  padding: 64px 24px; max-width: 1280px; margin: 0 auto;
  border-top: 1px solid var(--vb-color-gray-50);
}
.section--cream { background: var(--vb-color-background-cream); max-width: none; }
.section--cream > .section__inner {
  max-width: 1280px; margin: 0 auto; padding: 64px 24px;
}
.section__num {
  display: inline-block;
  font-size: 12px; font-weight: var(--vb-font-weight-bold);
  letter-spacing: 2px; color: var(--vb-color-text-secondary);
  margin-bottom: 12px;
}
.section__title {
  font-size: 34px; font-weight: var(--vb-font-weight-regular);
  margin-bottom: 12px; line-height: 1.3;
}
.section__lead {
  font-size: 16px; color: var(--vb-color-text-secondary);
  margin-bottom: 40px; max-width: 720px;
}

/* ============================================
   GRID
   ============================================ */
.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 768px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .hero { padding: 48px 24px; }
  .hero__title { font-size: 36px; }
  .section { padding: 48px 24px; }
  .section__title { font-size: 24px; }
}

/* ============================================
   CARD / CATEGORY CARD
   ============================================ */
.cat-card {
  display: block; padding: 32px;
  background: var(--vb-color-base-white);
  border: 1px solid var(--vb-color-gray-100);
  border-left: 4px solid var(--cat-color, var(--vb-color-brand));
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.cat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,0,0,.06);
  color: inherit;
}
.cat-card__label {
  font-size: 12px; font-weight: var(--vb-font-weight-bold);
  letter-spacing: 2px; color: var(--cat-color, var(--vb-color-brand));
  margin-bottom: 12px; text-transform: uppercase;
}
.cat-card__title {
  font-size: 24px; font-weight: var(--vb-font-weight-bold);
  margin-bottom: 8px;
}
.cat-card__desc {
  font-size: 14px; color: var(--vb-color-text-secondary);
  line-height: 1.6; margin-bottom: 16px;
}
.cat-card__meta {
  font-size: 12px; color: var(--vb-color-text-secondary);
}
.cat-card[data-cat="buy"] { --cat-color: var(--vb-color-service-buy); }
.cat-card[data-cat="sell"] { --cat-color: var(--vb-color-service-sell); }
.cat-card[data-cat="hire"] { --cat-color: var(--vb-color-service-library); }

/* ============================================
   SWATCH (color sample)
   ============================================ */
.swatch {
  border: 1px solid var(--vb-color-gray-100);
  background: var(--vb-color-base-white);
}
.swatch__chip { height: 96px; background: var(--chip-color, #ccc); }
.swatch__meta { padding: 12px; font-size: 12px; }
.swatch__name { font-weight: var(--vb-font-weight-bold); margin-bottom: 4px; }
.swatch__hex { color: var(--vb-color-text-secondary); font-family: ui-monospace, monospace; }

/* ============================================
   TABLE
   ============================================ */
.table {
  width: 100%; border-collapse: collapse;
  font-size: 14px;
}
.table th, .table td {
  text-align: left; padding: 12px 16px;
  border-bottom: 1px solid var(--vb-color-gray-100);
}
.table th {
  font-weight: var(--vb-font-weight-bold);
  background: var(--vb-color-gray-50);
  font-size: 12px; letter-spacing: 1px; text-transform: uppercase;
  color: var(--vb-color-text-secondary);
}
.table td.mono { font-family: ui-monospace, monospace; font-size: 13px; }

/* ============================================
   COPY EXAMPLE
   ============================================ */
.copy-example {
  padding: 16px 20px;
  background: var(--vb-color-gray-50);
  border-left: 3px solid var(--cat-color, var(--vb-color-brand));
  margin-bottom: 8px;
  font-size: 15px;
}
.copy-example__meta {
  font-size: 11px; color: var(--vb-color-text-secondary);
  letter-spacing: 1px; text-transform: uppercase; margin-bottom: 4px;
}

/* ============================================
   FORMAT TILE
   ============================================ */
.format-tile {
  padding: 24px;
  background: var(--vb-color-base-white);
  border: 1px solid var(--vb-color-gray-100);
}
.format-tile__ratio {
  background: var(--vb-color-gray-50);
  border: 1px dashed var(--vb-color-gray-200);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; color: var(--vb-color-text-secondary);
  margin-bottom: 16px;
}
.format-tile__size { font-weight: var(--vb-font-weight-bold); font-size: 14px; margin-bottom: 4px; }
.format-tile__use { font-size: 12px; color: var(--vb-color-text-secondary); }

/* ============================================
   NG BLOCK
   ============================================ */
.do-dont { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.do-dont__col { padding: 24px; border: 1px solid var(--vb-color-gray-100); }
.do-dont__col h4 {
  font-size: 12px; font-weight: var(--vb-font-weight-bold);
  letter-spacing: 2px; text-transform: uppercase; margin-bottom: 12px;
}
.do-dont__col--do h4 { color: var(--vb-color-brand); }
.do-dont__col--dont h4 { color: var(--vb-color-semantic-error); }
.do-dont__col ul li {
  padding: 8px 0 8px 20px; position: relative;
  font-size: 14px; line-height: 1.6;
}
.do-dont__col--do ul li::before {
  content: "✓"; position: absolute; left: 0; color: var(--vb-color-brand);
  font-weight: var(--vb-font-weight-bold);
}
.do-dont__col--dont ul li::before {
  content: "×"; position: absolute; left: 0; color: var(--vb-color-semantic-error);
  font-weight: var(--vb-font-weight-bold);
}
@media (max-width: 768px) { .do-dont { grid-template-columns: 1fr; } }

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  padding: 48px 24px; background: var(--vb-color-gray-500);
  color: var(--vb-color-text-inverse);
}
.site-footer__inner { max-width: 1280px; margin: 0 auto; }
.site-footer p { font-size: 13px; opacity: .7; }
.site-footer a { color: var(--vb-color-text-inverse); border-bottom: 1px solid rgba(255,255,255,.3); }

/* ============================================
   BADGES / TAGS
   ============================================ */
.badge {
  display: inline-block; padding: 2px 8px;
  font-size: 11px; font-weight: var(--vb-font-weight-bold);
  letter-spacing: 1px;
  background: var(--vb-color-gray-50);
  color: var(--vb-color-text-secondary);
}
.badge--wip { background: var(--vb-color-semantic-accent); color: var(--vb-color-gray-500); }
.badge--new { background: var(--vb-color-brand); color: var(--vb-color-base-white); }

/* ============================================
   COMING SOON
   ============================================ */
.coming-soon {
  padding: 96px 24px; text-align: center;
  background: var(--vb-color-background-cream);
}
.coming-soon h3 {
  font-size: 24px; font-weight: var(--vb-font-weight-regular);
  margin-bottom: 12px;
}
.coming-soon p { color: var(--vb-color-text-secondary); font-size: 14px; }