/* ==========================================================================
   Grant Search Section v40.0 - Archive Integration Complete
   官公庁風シンプルデザイン - 白背景ベース + 濃紺×金アクセント
   v40.0: アーカイブページとの完全連携
   ========================================================================== */

/* ==========================================================================
   Google Fonts Import
   ========================================================================== */
@import url('https://fonts.googleapis.com/css2?family=Shippori+Mincho:wght@400;500;600;700;800&family=Noto+Sans+JP:wght@400;500;700&family=Zen+Old+Mincho:wght@700;900&display=swap');

/* ==========================================================================
   CSS Variables
   ========================================================================== */
:root {
    /* Colors */
    --gs-white: #fdfdfd;
    --gs-bg: #f4f6f8;
    --gs-navy: #0f2350;
    --gs-navy-light: #1a3a70;
    --gs-gold: #c5a059;
    --gs-gold-light: #e6c885;
    --gs-red: #a63737;
    --gs-text: #2b2b2b;
    --gs-text-light: #6b7280;
    --gs-border: #dce3ea;
    --gs-border-light: #e5e7eb;
    --gs-paper-warm: #fdfbf7;
    
    /* Typography */
    --gs-font-serif: "Shippori Mincho", "Yu Mincho", serif;
    --gs-font-sans: "Noto Sans JP", -apple-system, sans-serif;
    --gs-font-heading: "Zen Old Mincho", serif;
    
    /* Spacing */
    --gs-space-xs: 4px;
    --gs-space-sm: 8px;
    --gs-space-md: 16px;
    --gs-space-lg: 24px;
    --gs-space-xl: 32px;
    --gs-space-2xl: 48px;
    
    /* Effects */
    --gs-shadow: 0 4px 6px -1px rgba(15, 35, 80, 0.1), 0 2px 4px -1px rgba(15, 35, 80, 0.06);
    --gs-shadow-lg: 0 10px 30px -5px rgba(15, 35, 80, 0.15);
    --gs-shadow-inner: inset 0 2px 4px 0 rgba(0,0,0,0.05);
    --gs-radius: 4px;
    --gs-transition: 0.25s ease;
}

/* ==========================================================================
   Main Section
   ========================================================================== */
.gs-search {
    background-color: rgba(244, 246, 248, 0.3);
    padding: 64px 0;
    font-family: var(--gs-font-sans);
    color: var(--gs-text);
    line-height: 1.7;
    border-top: 1px solid var(--gs-border);
    border-bottom: 1px solid var(--gs-border);
}

.gs-search__container {
    max-width: 1152px;
    margin: 0 auto;
    padding: 0 16px;
}

@media (min-width: 768px) {
    .gs-search__container {
        padding: 0 32px;
    }
}

/* ==========================================================================
   Section Header
   ========================================================================== */
.gs-search__header {
    text-align: center;
    margin-bottom: 40px;
}

.gs-search__badge {
    display: inline-block;
    border: 1px solid var(--gs-gold);
    color: var(--gs-gold);
    padding: 4px 12px;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.15em;
    margin-bottom: 12px;
    background: var(--gs-white);
    box-shadow: var(--gs-shadow);
    border-radius: 2px;
}

.gs-search__title {
    font-family: var(--gs-font-heading);
    font-size: 30px;
    font-weight: 700;
    color: var(--gs-navy);
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

@media (max-width: 640px) {
    .gs-search__title {
        font-size: 24px;
        gap: 12px;
    }
}

.gs-search__title-line {
    width: 48px;
    height: 1px;
    background: rgba(15, 35, 80, 0.3);
}

@media (max-width: 640px) {
    .gs-search__title-line {
        width: 32px;
    }
}

/* ==========================================================================
   Main Search Panel
   ========================================================================== */
.gs-search__panel {
    background: var(--gs-white);
    border: 2px solid var(--gs-navy);
    border-radius: var(--gs-radius);
    box-shadow: var(--gs-shadow);
    padding: 24px;
    position: relative;
    overflow: hidden;
}

@media (min-width: 768px) {
    .gs-search__panel {
        padding: 40px;
    }
}

/* Decorative Corners */
.gs-search__corner {
    position: absolute;
    width: 64px;
    height: 64px;
    pointer-events: none;
}

.gs-search__corner--tl {
    top: 0;
    left: 0;
    border-top: 20px solid rgba(197, 160, 89, 0.2);
    border-left: 20px solid rgba(197, 160, 89, 0.2);
    border-radius: 4px 0 0 0;
}

.gs-search__corner--br {
    bottom: 0;
    right: 0;
    border-bottom: 20px solid rgba(15, 35, 80, 0.05);
    border-right: 20px solid rgba(15, 35, 80, 0.05);
    border-radius: 0 0 4px 0;
}

/* ==========================================================================
   Search Controls
   ========================================================================== */
.gs-search__controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--gs-border);
}

.gs-search__toggle-group {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Toggle Switch */
.gs-search__toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.gs-search__toggle-input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.gs-search__toggle-switch {
    position: relative;
    width: 40px;
    height: 20px;
    background: #e5e7eb;
    border-radius: 10px;
    transition: var(--gs-transition);
}

.gs-search__toggle-switch::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    background: var(--gs-white);
    border: 1px solid #d1d5db;
    border-radius: 50%;
    transition: var(--gs-transition);
}

.gs-search__toggle-input:checked + .gs-search__toggle-switch {
    background: var(--gs-navy);
}

.gs-search__toggle-input:checked + .gs-search__toggle-switch::after {
    left: 22px;
    border-color: var(--gs-white);
}

.gs-search__toggle-input:focus-visible + .gs-search__toggle-switch {
    outline: 2px solid var(--gs-navy);
    outline-offset: 2px;
}

.gs-search__toggle-label {
    font-size: 14px;
    font-weight: 700;
    color: var(--gs-navy);
}

.gs-search__divider {
    color: #d1d5db;
    font-size: 12px;
}

.gs-search__link-btn {
    background: none;
    border: none;
    font-size: 14px;
    font-weight: 700;
    color: var(--gs-text-light);
    cursor: pointer;
    transition: var(--gs-transition);
    font-family: var(--gs-font-sans);
}

.gs-search__link-btn:hover {
    color: var(--gs-gold);
}

/* Quick Links */
.gs-search__quick-links {
    display: flex;
    gap: 8px;
}

.gs-search__quick-link {
    font-size: 12px;
    font-weight: 700;
    color: var(--gs-navy);
    text-decoration: none;
    border-bottom: 1px dashed var(--gs-navy);
    padding-bottom: 2px;
    transition: var(--gs-transition);
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
    cursor: pointer;
    font-family: var(--gs-font-sans);
}

.gs-search__quick-link:hover {
    color: var(--gs-gold);
    border-color: var(--gs-gold);
}

/* ==========================================================================
   Filter Groups
   ========================================================================== */
.gs-search__filters {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.gs-search__group {
    border: 1px solid var(--gs-border);
    border-radius: var(--gs-radius);
    padding: 16px;
    background: rgba(244, 246, 248, 0.2);
}

.gs-search__group--freeword {
    background: transparent;
    border: none;
    padding: 0;
}

/* Group Header */
.gs-search__group-header {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    margin-bottom: 16px;
    font-family: var(--gs-font-sans);
}

.gs-search__group-header:hover .gs-search__group-hint {
    border-color: var(--gs-gold);
}

.gs-search__group-title {
    font-family: var(--gs-font-serif);
    font-size: 18px;
    font-weight: 700;
    color: var(--gs-navy);
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
}

.gs-search__group-title--inline {
    margin-bottom: 12px;
}

.gs-search__group-bar {
    width: 4px;
    height: 20px;
    background: var(--gs-gold);
    flex-shrink: 0;
}

.gs-search__group-action {
    display: flex;
    align-items: center;
    gap: 8px;
}

.gs-search__group-hint {
    font-size: 12px;
    color: var(--gs-text-light);
    background: var(--gs-white);
    border: 1px solid #e5e7eb;
    padding: 4px 8px;
    border-radius: var(--gs-radius);
    box-shadow: var(--gs-shadow);
    transition: var(--gs-transition);
}

.gs-search__group-selected {
    font-size: 12px;
    color: var(--gs-text-light);
}

.gs-search__group-arrow {
    color: var(--gs-navy);
    font-size: 12px;
    transition: transform 0.3s ease;
}

/* Group Content */
.gs-search__group-content {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.4s ease-out, opacity 0.4s ease-out;
}

.gs-search__group-content--open {
    max-height: 2000px;
    opacity: 1;
    transition: max-height 0.6s ease-in, opacity 0.6s ease-in;
}

/* Scrollable Container */
.gs-search__scrollable {
    max-height: 240px;
    overflow-y: auto;
    padding-right: 8px;
    padding-bottom: 8px;
}

.gs-search__scrollable::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

.gs-search__scrollable::-webkit-scrollbar-track {
    background: var(--gs-bg);
}

.gs-search__scrollable::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 3px;
}

.gs-search__scrollable::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* ==========================================================================
   Index Grid (Categories)
   ========================================================================== */
.gs-search__index-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 8px;
}

.gs-search__checkbox-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    padding: 6px;
    border-radius: var(--gs-radius);
    cursor: pointer;
    transition: var(--gs-transition);
}

.gs-search__checkbox-item:hover {
    background: var(--gs-white);
    box-shadow: var(--gs-shadow);
}

.gs-search__checkbox {
    accent-color: var(--gs-navy);
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.gs-search__checkbox-text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ==========================================================================
   Category Links (v40.0)
   ========================================================================== */
.gs-search__category-link {
    display: inline-block;
    background: var(--gs-white);
    border: 1px solid #d1d5db;
    padding: 6px 12px;
    font-size: 12px;
    color: var(--gs-text);
    text-decoration: none;
    border-radius: var(--gs-radius);
    transition: var(--gs-transition);
    margin: 0 4px 4px 0;
}

.gs-search__category-link:hover {
    background: var(--gs-navy);
    border-color: var(--gs-navy);
    color: var(--gs-white);
}

.gs-search__count {
    color: var(--gs-text-light);
    font-size: 11px;
}

.gs-search__category-link:hover .gs-search__count {
    color: var(--gs-gold-light);
}

/* Municipality Loading/Empty/Error States (v40.0) */
.gs-search__municipality-loading,
.gs-search__municipality-empty,
.gs-search__municipality-error {
    grid-column: 1 / -1;
    text-align: center;
    padding: 24px 16px;
    color: var(--gs-text-light);
    font-size: 13px;
}

.gs-search__municipality-error {
    color: var(--gs-red);
}

/* ==========================================================================
   Prefecture Grid
   ========================================================================== */
.gs-search__pref-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 8px;
}

.gs-search__pref-link {
    display: block;
    background: var(--gs-white);
    border: 1px solid #d1d5db;
    padding: 8px;
    font-size: 14px;
    text-align: center;
    color: var(--gs-text);
    text-decoration: none;
    border-radius: var(--gs-radius);
    transition: var(--gs-transition);
}

.gs-search__pref-link:hover {
    background: var(--gs-navy);
    border-color: var(--gs-navy);
    color: var(--gs-white);
}

/* ==========================================================================
   Municipality Section
   ========================================================================== */
.gs-search__municipality {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.gs-search__municipality-select {
    max-width: 300px;
}

.gs-search__select {
    width: 100%;
    height: 48px;
    padding: 0 40px 0 16px;
    background: var(--gs-white);
    border: 1px solid #d1d5db;
    border-radius: var(--gs-radius);
    font-family: var(--gs-font-sans);
    font-size: 14px;
    color: var(--gs-text);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%230f2350'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    transition: var(--gs-transition);
}

.gs-search__select:hover {
    border-color: var(--gs-navy);
}

.gs-search__select:focus {
    outline: none;
    border-color: var(--gs-navy);
    box-shadow: 0 0 0 3px rgba(15, 35, 80, 0.1);
}

.gs-search__municipality-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 8px;
}

.gs-search__city-link {
    display: block;
    background: var(--gs-white);
    border: 1px solid #d1d5db;
    padding: 8px;
    font-size: 12px;
    text-align: center;
    color: var(--gs-text);
    text-decoration: none;
    border-radius: var(--gs-radius);
    transition: var(--gs-transition);
}

.gs-search__city-link:hover {
    background: var(--gs-navy);
    border-color: var(--gs-navy);
    color: var(--gs-white);
}

/* ==========================================================================
   Free Word Input
   ========================================================================== */
.gs-search__freeword {
    position: relative;
}

.gs-search__freeword-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: #9ca3af;
    pointer-events: none;
}

.gs-search__freeword-input {
    width: 100%;
    height: 48px;
    padding: 0 16px 0 40px;
    background: var(--gs-white);
    border: 1px solid #d1d5db;
    border-radius: var(--gs-radius);
    font-family: var(--gs-font-sans);
    font-size: 14px;
    color: var(--gs-text);
    box-shadow: var(--gs-shadow-inner);
    transition: var(--gs-transition);
}

.gs-search__freeword-input::placeholder {
    color: #9ca3af;
}

.gs-search__freeword-input:hover {
    border-color: var(--gs-navy);
}

.gs-search__freeword-input:focus {
    outline: none;
    border-color: var(--gs-navy);
    box-shadow: 0 0 0 3px rgba(15, 35, 80, 0.1);
}

/* ==========================================================================
   Submit Button
   ========================================================================== */
.gs-search__submit {
    margin-top: 32px;
    text-align: center;
}

.gs-search__submit-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    max-width: 400px;
    height: 56px;
    background: var(--gs-navy);
    color: var(--gs-white);
    border: none;
    border-bottom: 4px solid rgba(0, 0, 0, 0.2);
    border-radius: var(--gs-radius);
    font-family: var(--gs-font-sans);
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.1em;
    cursor: pointer;
    box-shadow: var(--gs-shadow-lg);
    transition: var(--gs-transition);
}

.gs-search__submit-btn:hover {
    background: var(--gs-navy-light);
}

.gs-search__submit-btn:active {
    border-bottom-width: 0;
    transform: translateY(4px);
}

.gs-search__submit-btn svg {
    width: 20px;
    height: 20px;
}

.gs-search__advanced-link {
    display: inline-block;
    margin-top: 16px;
    font-size: 12px;
    font-weight: 700;
    color: var(--gs-navy);
    text-decoration: none;
    border-bottom: 1px solid var(--gs-navy);
    padding-bottom: 2px;
    transition: var(--gs-transition);
}

.gs-search__advanced-link:hover {
    color: var(--gs-gold);
    border-color: var(--gs-gold);
}

/* ==========================================================================
   Popular Keywords Section
   ========================================================================== */
.gs-search__keywords {
    margin-top: 64px;
    background: var(--gs-paper-warm);
    border: 2px solid var(--gs-navy);
    padding: 24px;
    position: relative;
}

@media (min-width: 768px) {
    .gs-search__keywords {
        padding: 32px;
    }
}

.gs-search__keywords-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 24px;
}

.gs-search__keywords-title {
    font-family: var(--gs-font-serif);
    font-size: 18px;
    font-weight: 700;
    color: var(--gs-navy);
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 0;
}

.gs-search__keywords-badge {
    display: inline-block;
    background: var(--gs-navy);
    color: var(--gs-white);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.15em;
    padding: 4px 8px;
    border-radius: var(--gs-radius);
    font-family: var(--gs-font-sans);
}

.gs-search__keywords-toggle {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    font-weight: 700;
    color: var(--gs-gold);
    background: var(--gs-white);
    border: 1px solid #e5e7eb;
    padding: 6px 12px;
    border-radius: 9999px;
    box-shadow: var(--gs-shadow);
    cursor: pointer;
    transition: var(--gs-transition);
    font-family: var(--gs-font-sans);
}

.gs-search__keywords-toggle:hover {
    color: var(--gs-navy);
    border-color: var(--gs-navy);
}

.gs-search__keywords-toggle svg {
    width: 12px;
    height: 12px;
    transition: transform 0.3s ease;
}

/* Keywords Container */
.gs-search__keywords-container {
    position: relative;
    max-height: 120px;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.gs-search__keywords-container--expanded {
    max-height: none;
}

.gs-search__keywords-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 16px;
    font-size: 12px;
    line-height: 1.8;
}

.gs-search__keyword {
    color: var(--gs-text-light);
    text-decoration: none;
    transition: var(--gs-transition);
}

.gs-search__keyword:hover {
    color: var(--gs-navy);
}

.gs-search__keyword--popular {
    font-weight: 700;
    color: var(--gs-navy);
    border-bottom: 1px dotted var(--gs-navy);
}

.gs-search__keyword--popular:hover {
    color: var(--gs-gold);
    border-color: var(--gs-gold);
}

.gs-search__keyword-divider {
    width: 100%;
    height: 1px;
    background: #e5e7eb;
    display: block;
    margin: 4px 0;
}

/* Gradient Overlay */
.gs-search__keywords-gradient {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 80px;
    background: linear-gradient(to top, var(--gs-paper-warm), transparent);
    pointer-events: none;
    transition: opacity 0.3s ease;
}

/* Keywords Note */
.gs-search__keywords-note {
    font-size: 10px;
    color: #9ca3af;
    text-align: center;
    margin: 16px 0 0 0;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 767px) {
    .gs-search {
        padding: 40px 0;
    }
    
    .gs-search__controls {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .gs-search__toggle-group {
        flex-wrap: wrap;
    }
    
    .gs-search__quick-links {
        width: 100%;
        justify-content: flex-start;
    }
    
    .gs-search__group-title {
        font-size: 16px;
    }
    
    .gs-search__index-grid,
    .gs-search__pref-grid,
    .gs-search__municipality-list {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }
    
    .gs-search__submit-btn {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .gs-search__panel {
        padding: 16px;
    }
    
    .gs-search__group {
        padding: 12px;
    }
    
    .gs-search__keywords {
        padding: 16px;
    }
    
    .gs-search__keywords-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* ==========================================================================
   Accessibility
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
    .gs-search__group-content,
    .gs-search__keywords-container {
        transition: none;
    }
    
    * {
        transition-duration: 0.01ms !important;
    }
}

.gs-search a:focus-visible,
.gs-search button:focus-visible,
.gs-search input:focus-visible,
.gs-search select:focus-visible {
    outline: 3px solid var(--gs-gold);
    outline-offset: 2px;
}

/* ==========================================================================
   Print
   ========================================================================== */
@media print {
    .gs-search {
        background: white;
        padding: 24px 0;
        border: none;
    }
    
    .gs-search__panel {
        box-shadow: none;
        border: 1px solid #000;
    }
    
    .gs-search__keywords {
        display: none;
    }
    
    .gs-search__submit-btn {
        display: none;
    }
}