/* ============================================================
 * components/header-search.css
 * ヘッダー🔍 をクリックするとその場でドロップダウン展開する
 * 検索パネル（form + 例題チップ + 検索ボタン）。
 * ============================================================ */

.site-header__search-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.site-header__search-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  margin: 0;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.site-header__search-trigger:hover,
.site-header__search-trigger[aria-expanded="true"] {
  color: var(--color-main);
  background: var(--color-base-2);
}

.site-header__search-trigger:focus-visible {
  outline: 2px solid var(--color-main);
  outline-offset: 2px;
}

.site-header__search-icon {
  display: block;
}

/* ===== ドロップダウンパネル ===== */
.site-header__search-panel {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  width: min(480px, calc(100vw - 24px));
  padding: 18px;
  background: var(--color-base-1);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  animation: header-search-fade-down 0.14s ease-out;
  transform-origin: top right;
}

.site-header__search-panel[hidden] {
  display: none;
}

@keyframes header-search-fade-down {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.site-header__search-panel::before {
  content: '';
  position: absolute;
  top: -7px;
  right: 14px;
  width: 12px;
  height: 12px;
  background: var(--color-base-1);
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
  transform: rotate(45deg);
}

.site-header__search-title {
  margin: 0 0 12px;
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text-primary);
}

/* ===== フォーム ===== */
.site-header__search-form {
  display: flex;
  gap: 8px;
  align-items: stretch;
}

.site-header__search-input-wrap {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
}

.site-header__search-input-icon {
  position: absolute;
  top: 50%;
  left: 12px;
  transform: translateY(-50%);
  color: var(--color-text-secondary);
  pointer-events: none;
}

.site-header__search-input {
  width: 100%;
  height: 42px;
  padding: 0 12px 0 38px;
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
  background: var(--color-base-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
  -webkit-appearance: none;
  appearance: none;
}

.site-header__search-input::-webkit-search-decoration,
.site-header__search-input::-webkit-search-cancel-button {
  -webkit-appearance: none;
}

.site-header__search-input:focus {
  outline: none;
  background: var(--color-base-1);
  border-color: var(--color-main);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-main) 15%, transparent);
}

.site-header__search-submit {
  flex: 0 0 auto;
  padding: 0 18px;
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text-inverse);
  background: var(--color-main);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background 0.15s ease;
}

.site-header__search-submit:hover:not(:disabled) {
  background: var(--color-main-dark);
}

.site-header__search-submit:focus-visible {
  outline: 2px solid var(--color-main-dark);
  outline-offset: 2px;
}

.site-header__search-submit:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

/* ===== 例題チップ ===== */
.site-header__search-suggest-label {
  margin: 16px 0 8px;
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

.site-header__search-suggests {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__search-suggests li {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__search-suggest {
  display: inline-block;
  max-width: 100%;
  padding: 6px 12px;
  font-size: var(--font-size-xs);
  color: var(--color-text-primary);
  background: var(--color-base-1);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  text-align: left;
  white-space: normal;
  line-height: 1.4;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.site-header__search-suggest:hover {
  color: var(--color-main);
  border-color: var(--color-main);
  background: var(--color-base-2);
}

.site-header__search-suggest:focus-visible {
  outline: 2px solid var(--color-main);
  outline-offset: 2px;
}

/* ===== モバイル ===== */
@media (max-width: 640px) {
  .site-header__search-panel {
    position: fixed;
    top: 64px;
    left: 12px;
    right: 12px;
    width: auto;
    max-width: none;
    transform-origin: top center;
  }
  .site-header__search-panel::before {
    display: none;
  }
}

/* ===== モーション低減 ===== */
@media (prefers-reduced-motion: reduce) {
  .site-header__search-panel {
    animation: none;
  }
}