/* ================================================================
   layout.css — BitTradeBlog
   グリッド・コンテナ・ページ構造
================================================================ */

/* ── Site wrapper ── */
#page {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

#content {
  flex: 1;
}

/* ── Content + Sidebar layout ── */
.content-area {
  width: 100%;
}

@media (min-width: 1024px) {
  .has-sidebar .site-content-inner {
    display: grid;
    grid-template-columns: 1fr var(--sidebar-width);
    gap: var(--sp-10);
    align-items: flex-start;
  }
  .has-sidebar .content-area {
    min-width: 0; /* prevent grid blowout */
  }
}

/* ── Site main padding ── */
.site-main {
  padding-top: var(--sp-8);
  padding-bottom: var(--sp-16);
}

/* ── Card grids ── */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-5);
}

@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .card-grid--two {
    grid-template-columns: repeat(2, 1fr);
  }
  .card-grid--four {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* STEPカード：常に横1列（front-page の詳細度に勝つため !important） */
.card-grid--four {
  grid-template-columns: repeat(4, 1fr) !important;
}

/* ── Section spacing ── */
.page-section {
  padding: var(--sp-10) 0;
}
.page-section + .page-section {
  padding-top: 0;
}

/* ── Section header row ── */
.section-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-5);
}
.section-more-link {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-primary-dark);
  white-space: nowrap;
}
.section-more-link:hover {
  color: var(--color-primary);
}

/* ── Category tabs ── */
.cat-tabs {
  display: flex;
  gap: var(--sp-2);
  margin-bottom: var(--sp-5);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-bottom: 2px;
}
.cat-tabs::-webkit-scrollbar { display: none; }

.cat-tab {
  padding: 5px var(--sp-3);
  border-radius: var(--r-full);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: var(--text-xs);
  color: var(--color-text-sub);
  white-space: nowrap;
  cursor: pointer;
  transition: var(--transition-fast);
  flex-shrink: 0;
}
.cat-tab:hover {
  border-color: #1191E5;
  color: #1191E5;
  background: rgba(17, 145, 229, 0.12);
}
.cat-tab.is-active {
  background: #1191E5;
  border-color: #1191E5;
  color: #fff;
  font-weight: 700;
}

/* ================================================================
   ARCHIVE HERO
================================================================ */
.archive-hero {
  padding: var(--sp-12) 0 var(--sp-10);
  position: relative;
  overflow: hidden;
}
.archive-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(0,217,255,.07) 0%, transparent 70%);
  pointer-events: none;
}
.archive-hero__inner { position: relative; z-index: 1; max-width: 680px; }
.archive-hero__eyebrow {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--sp-3);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.archive-hero__eyebrow::before {
  content: '';
  width: 16px;
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--r-full);
}
.archive-hero__title {
  font-family: var(--font-serif);
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 700;
  color: #fff;
  line-height: var(--leading-snug);
  margin-bottom: var(--sp-4);
}
.archive-hero__desc {
  font-size: var(--text-sm);
  color: rgba(255,255,255,.55);
  line-height: var(--leading-normal);
  margin-bottom: var(--sp-4);
  max-width: 560px;
}
.archive-hero__count {
  font-size: var(--text-xs);
  font-weight: 700;
  color: rgba(255,255,255,.4);
}

/* ── Pagination ── */
.pagination-wrap {
  margin-top: var(--sp-10);
}
.pagination-wrap .nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-wrap: wrap;
}
.pagination-wrap .page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 var(--sp-2);
  border-radius: var(--r-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-sub);
  text-decoration: none;
  transition: var(--transition-fast);
}
.pagination-wrap .page-numbers:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
}
.pagination-wrap .page-numbers.current {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--gray-900);
  font-weight: 700;
}
.pagination-wrap .page-numbers.dots {
  border: none;
  background: none;
}

/* ================================================================
   SEARCH PAGE
================================================================ */
.search-hero {
  background: var(--gray-900);
  padding: var(--sp-10) 0 var(--sp-8);
}
.search-hero__label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--sp-3);
}
.search-hero__title {
  font-family: var(--font-serif);
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--sp-3);
}
.search-hero__count {
  font-size: var(--text-xs);
  color: rgba(255,255,255,.4);
  margin-bottom: var(--sp-5);
}
.search-hero__form .search-form {
  display: flex;
  gap: var(--sp-2);
  max-width: 480px;
}
.search-hero__form .search-field {
  flex: 1;
  padding: 10px var(--sp-4);
  border-radius: var(--r-md);
  border: 1.5px solid rgba(255,255,255,.15);
  background: rgba(255,255,255,.08);
  color: #fff;
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  outline: none;
}
.search-hero__form .search-field:focus {
  border-color: var(--color-primary);
}
.search-hero__form .search-field::placeholder { color: rgba(255,255,255,.35); }
.search-hero__form .search-submit {
  padding: 10px var(--sp-5);
  background: var(--color-primary);
  color: var(--gray-900);
  font-size: var(--text-sm);
  font-weight: 700;
  border-radius: var(--r-md);
  border: none;
  cursor: pointer;
  transition: var(--transition-fast);
  font-family: var(--font-sans);
}
.search-hero__form .search-submit:hover { background: var(--blue-400); }

.search-empty {
  padding: var(--sp-10) 0;
}
.search-empty__text {
  font-size: var(--text-lg);
  color: var(--color-text-sub);
  margin-bottom: var(--sp-5);
}
.search-empty__tips {
  list-style: disc;
  padding-left: 1.5em;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 2;
}

/* ================================================================
   404 PAGE
================================================================ */
.error-page { padding: var(--sp-16) 0; }
.error-inner { max-width: 800px; margin: 0 auto; text-align: center; }
.error-code {
  font-size: clamp(80px, 15vw, 140px);
  font-weight: 900;
  color: var(--color-border);
  line-height: 1;
  margin-bottom: var(--sp-4);
  letter-spacing: -.04em;
  background: linear-gradient(135deg, var(--blue-200), var(--blue-400));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.error-title {
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--sp-4);
}
.error-desc {
  font-size: var(--text-base);
  color: var(--color-text-sub);
  margin-bottom: var(--sp-8);
}
.error-actions {
  display: flex;
  gap: var(--sp-3);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--sp-12);
}
.error-popular { text-align: left; }
.error-popular__title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--sp-5);
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.error-popular__title::before {
  content: '';
  width: 3px;
  height: 20px;
  background: var(--color-primary);
  border-radius: var(--r-full);
}

/* ================================================================
   FRONT PAGE 専用：3列グリッド強制
================================================================ */
.front-page .card-grid,
.card-grid--three {
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .front-page .card-grid,
  .card-grid--three {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .front-page .card-grid,
  .card-grid--three {
    grid-template-columns: repeat(3, 1fr) !important;
  }
}

/* サイドバーなし時のコンテンツ幅100% */
.front-page .content-area {
  width: 100%;
}

/* ================================================================
   BREADCRUMB
================================================================ */
.breadcrumb {
  margin-bottom: var(--sp-5);
}
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  list-style: none;
  padding: 0;
  margin: 0;
}
.breadcrumb__item {
  display: flex;
  align-items: center;
  font-size: 12px;
  color: var(--color-text-muted);
}
.breadcrumb__item + .breadcrumb__item::before {
  content: '›';
  margin: 0 var(--sp-2);
  color: var(--color-border);
  font-size: 14px;
  line-height: 1;
}
.breadcrumb__link {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
}
.breadcrumb__link:hover {
  color: var(--color-primary-dark);
}
.breadcrumb__current {
  color: var(--color-text-sub);
  font-weight: 500;
  /* 長いタイトルは省略 */
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: inline-block;
  vertical-align: middle;
}

/* ================================================================
   ガイドカードグリッド（feature.php / beginners 共通）
================================================================ */
.bg-guide-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 24px;
}
@media (max-width: 1023px) {
  .archive-page .container > div[style*="grid-template-columns"] {
    display: block !important;
  }
}

@media (max-width: 767px) {
  .bg-guide-grid { grid-template-columns: repeat(2, 1fr); }
}

.bg-guide-card {
  display: flex;
  flex-direction: column;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid #eef2f7;
  box-shadow: 0 2px 8px rgba(0,50,80,.07);
  text-decoration: none;
  transition: transform .2s, box-shadow .2s;
  background: #fff;
}
.bg-guide-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,50,80,.13);
}
.bg-guide-card__thumb {
  position: relative;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.bg-guide-card__label {
  font-size: 18px;
  font-weight: 900;
  color: rgba(255,255,255,.9);
  letter-spacing: .03em;
}
.bg-guide-card__step {
  position: absolute;
  top: 10px;
  left: 12px;
  font-size: 10px;
  font-weight: 700;
  color: rgba(255,255,255,.65);
  letter-spacing: .08em;
}
.bg-guide-card__body {
  padding: 14px 16px 18px;
  flex: 1;
}
.bg-guide-card__step-tag {
  font-size: 10px;
  font-weight: 700;
  color: #00BFEB;
  letter-spacing: .08em;
  margin: 0 0 6px;
}
.bg-guide-card__title {
  font-size: 13px;
  font-weight: 600;
  color: #111820;
  line-height: 1.55;
  margin: 0;
}