/* =============================================
   layout.css — Dragon Tools レイアウト
   ============================================= */

/* ── Site Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(10,6,18,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  height: 60px;
}

.site-header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-lg);
  font-weight: var(--weight-extrabold);
  flex-shrink: 0;
  text-decoration: none;
}
.site-header__logo-icon { font-size: 1.4rem; }
.site-header__logo-text {
  background: linear-gradient(90deg, var(--color-primary-light), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Desktop Nav */
.site-nav {
  display: none;
  align-items: center;
  gap: var(--space-1);
  flex: 1;
}
.site-nav__item {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-2);
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.site-nav__item:hover,
.site-nav__item[aria-current="page"] {
  background: rgba(124,58,237,0.15);
  color: var(--color-primary-light);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-left: auto;
}

/* Search button in header */
.header-search-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  color: var(--color-text-3);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.header-search-btn:hover { border-color: var(--color-border-accent); color: var(--color-text-2); }

/* Mobile menu button */
.mobile-menu-btn {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  cursor: pointer;
  background: none;
  border: none;
}
.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-2);
  border-radius: 2px;
  transition: all var(--transition-fast);
}
.mobile-menu-btn[aria-expanded="true"] span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mobile-menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.mobile-menu-btn[aria-expanded="true"] span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile drawer */
.mobile-nav {
  display: none;
  flex-direction: column;
  padding: var(--space-4);
  gap: var(--space-1);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-2);
}
.mobile-nav.is-open { display: flex; }
.mobile-nav__item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  color: var(--color-text-2);
  transition: all var(--transition-fast);
}
.mobile-nav__item:hover { background: rgba(124,58,237,0.15); color: var(--color-primary-light); }

@media (min-width: 1024px) {
  .site-nav { display: flex; }
  .mobile-menu-btn { display: none; }
}

/* ── Site Footer ── */
.site-footer {
  margin-top: var(--space-20);
  background: var(--color-bg-2);
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) 0 var(--space-8);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}
.site-footer__brand-name {
  font-size: var(--text-xl);
  font-weight: var(--weight-extrabold);
  background: linear-gradient(90deg, var(--color-primary-light), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-3);
}
.site-footer__brand-desc { font-size: var(--text-sm); color: var(--color-text-3); line-height: var(--leading-loose); }
.site-footer__col-title { font-size: var(--text-sm); font-weight: var(--weight-bold); color: var(--color-text); margin-bottom: var(--space-3); letter-spacing: 0.05em; }
.site-footer__links { display: flex; flex-direction: column; gap: var(--space-2); }
.site-footer__link { font-size: var(--text-sm); color: var(--color-text-3); transition: color var(--transition-fast); }
.site-footer__link:hover { color: var(--color-primary-light); }
.site-footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  align-items: center;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-xs);
  color: var(--color-text-3);
  text-align: center;
}

@media (min-width: 768px) {
  .site-footer__grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
  .site-footer__bottom { flex-direction: row; justify-content: space-between; text-align: left; }
}

/* ── Main content ── */
.site-main {
  min-height: 60vh;
}

/* ── Page layout with optional sidebar ── */
.page-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-items: start;
}
@media (min-width: 1024px) {
  .page-layout--sidebar {
    grid-template-columns: 1fr var(--width-sidebar);
  }
}

/* ── Breadcrumb ── */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  font-size: var(--text-xs);
  color: var(--color-text-3);
}
.breadcrumb__item { display: flex; align-items: center; gap: var(--space-2); }
.breadcrumb__link { color: var(--color-text-3); transition: color var(--transition-fast); }
.breadcrumb__link:hover { color: var(--color-primary-light); }
.breadcrumb__sep { color: var(--color-border); }
.breadcrumb__current { color: var(--color-text-2); }

/* ── Hero ── */
.hero {
  padding: var(--space-16) 0 var(--space-12);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(124,58,237,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.hero__eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary-light);
  background: rgba(124,58,237,0.12);
  border: 1px solid rgba(124,58,237,0.3);
  border-radius: var(--radius-full);
  padding: 4px 14px;
  margin-bottom: var(--space-5);
}
.hero__title {
  font-size: clamp(var(--text-3xl), 6vw, 56px);
  font-weight: var(--weight-extrabold);
  line-height: 1.15;
  margin-bottom: var(--space-5);
}
.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-2);
  max-width: 600px;
  margin: 0 auto var(--space-8);
  line-height: var(--leading-loose);
}
.hero__actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Card grid ── */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
@media (min-width: 640px) {
  .card-grid--2 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 768px) {
  .card-grid--3 { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1024px) {
  .card-grid--4 { grid-template-columns: repeat(4, 1fr); }
  .card-grid--5 { grid-template-columns: repeat(5, 1fr); }
}

/* ── Search overlay ── */
.search-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: var(--z-overlay);
  padding: var(--space-20) var(--space-4) 0;
}
.search-overlay.is-open { display: block; }
.search-box {
  background: var(--color-bg-2);
  border: 1px solid var(--color-border-accent);
  border-radius: var(--radius-xl);
  max-width: 600px;
  margin: 0 auto;
  overflow: hidden;
}
.search-box__input-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}
.search-box__input {
  flex: 1;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: var(--text-lg);
  outline: none;
}
.search-box__input::placeholder { color: var(--color-text-3); }
.search-box__results { max-height: 400px; overflow-y: auto; }
.search-result-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-fast);
  cursor: pointer;
}
.search-result-item:hover { background: rgba(124,58,237,0.12); }
.search-result-item:last-child { border-bottom: none; }
.search-result-item__title { font-size: var(--text-sm); font-weight: var(--weight-medium); }
.search-result-item__meta  { font-size: var(--text-xs); color: var(--color-text-3); margin-top: 2px; }

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-success);
  color: #052e16;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  z-index: var(--z-toast);
  transition: transform var(--transition-normal);
  white-space: nowrap;
}
.toast.is-visible { transform: translateX(-50%) translateY(0); }