/* ====== 2/3-A: モバイル基本CSS（mobile-base.css） ====== */

/* ====== 🔥 スクロール連動UI専用CSS ====== */
/* 🎯 重要：JS側で動的に適用されるスタイル */

/* スマホ表示でのヘッダー・フッター制御クラス */
@media (max-width: 768px) {
    
    /* ヘッダー制御用クラス */
    .header.js-scroll-hidden {
        transform: translateY(-100%) translateZ(0);
        opacity: 0;
        pointer-events: none;
        transition: transform 0.6s cubic-bezier(0.4, 0, 0.6, 1),
                   opacity 0.6s cubic-bezier(0.4, 0, 0.6, 1);
    }
    
    .header.js-scroll-visible {
        transform: translateY(0) translateZ(0);
        opacity: 1;
        pointer-events: auto;
        transition: transform 0.4s cubic-bezier(0.2, 0, 0.2, 1),
                   opacity 0.4s cubic-bezier(0.2, 0, 0.2, 1);
    }
    
    /* フッター制御用クラス */
    .footer.js-scroll-hidden {
        transform: translateY(100%) translateZ(0);
        opacity: 0;
        pointer-events: none;
        transition: transform 0.7s cubic-bezier(0.4, 0, 0.6, 1),
                   opacity 0.7s cubic-bezier(0.4, 0, 0.6, 1);
    }
    
    .footer.js-scroll-visible {
        transform: translateY(0) translateZ(0);
        opacity: 1;
        pointer-events: auto;
        transition: transform 0.45s cubic-bezier(0.2, 0, 0.2, 1),
                   opacity 0.45s cubic-bezier(0.2, 0, 0.2, 1);
    }
    
    /* JS制御時のベーススタイル */
    .header.js-controlled,
    .footer.js-controlled {
        will-change: transform, opacity;
        backface-visibility: hidden;
        transform: translateZ(0);
    }
}

/* ====== モバイルレスポンシブ（基本） ====== */
@media (max-width: 768px) {
    
    /* モバイルボディ調整 */
    body {
        padding-top: calc(var(--mobile-header-height) + var(--safe-area-inset-top) + 40px);
        padding-bottom: calc(env(safe-area-inset-bottom) + 80px);
    }
    
    /* ヘッダーモバイル調整 */
    .header {
        height: calc(var(--mobile-header-height) + var(--safe-area-inset-top));
        padding-top: var(--safe-area-inset-top);
    }
    
    .header-container {
        height: var(--mobile-header-height);
        padding: 0 1rem;
        padding-left: calc(1rem + var(--safe-area-inset-left));
        padding-right: calc(1rem + var(--safe-area-inset-right));
    }
    
    .logo {
        font-size: 1.6rem;
    }
    
    .header-center {
        display: none;
    }
    
    .nav-menu {
        display: none;
    }
    
    /* モバイルボタン表示 */
    .mobile-search-toggle,
    .mobile-menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: var(--mobile-touch-target);
        height: var(--mobile-touch-target);
        background: rgba(255, 255, 255, 0.15);
        border: none;
        border-radius: 12px;
        color: white;
        font-size: 1.2rem;
        cursor: pointer;
        transition: var(--mobile-animation);
        backdrop-filter: blur(10px);
        -webkit-tap-highlight-color: transparent;
    }
    
    .mode-toggle {
        width: var(--mobile-touch-target);
        height: var(--mobile-touch-target);
        -webkit-tap-highlight-color: transparent;
        margin-left: auto;
        margin-right: auto;
    }
    
    .mode-toggle span {
        position: relative;
        left: -9px;
        font-size: 1.2rem;
    }
}

/* ====== 横スライドタグ（修正版） ====== */
.tags-section {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 1.5rem 0;
    margin: 1rem 0;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.tags-container-wrapper {
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
}

.tags-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
    padding: 0 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* スマホ：横スクロール */
@media (max-width: 768px) {
    .tags-container {
        display: flex;
        flex-direction: row;
        flex-wrap: nowrap;
        gap: 0.75rem;
        padding: 0 1rem;
        overflow-x: auto;
        overflow-y: hidden;
        scroll-behavior: smooth;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        -ms-overflow-style: none;
        width: 100%;
        box-sizing: border-box;
    }
    
    .tags-container::-webkit-scrollbar {
        display: none;
    }
    
    .tags-container .tag {
        background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        color: white;
        padding: 0.6rem 1.2rem;
        border-radius: 20px;
        text-decoration: none;
        font-weight: 600;
        font-size: 0.9rem;
        white-space: nowrap;
        flex-shrink: 0;
        min-width: max-content;
        box-shadow: 0 2px 8px rgba(66, 134, 198, 0.3);
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        display: inline-block;
    }
    
    .tags-container .tag:hover,
    .tags-container .tag:active {
        transform: translateY(-2px) scale(1.05);
        box-shadow: 0 6px 20px rgba(66, 134, 198, 0.5);
    }
    
    /* 右端グラデーション効果 */
    .tags-container-wrapper::after {
        content: '';
        position: absolute;
        top: 50px;
        right: 0;
        bottom: 0;
        width: 30px;
        background: linear-gradient(to left, var(--card-background), transparent);
        pointer-events: none;
        z-index: 1;
    }
}

/* PC：通常表示 */
@media (min-width: 769px) {
    .tags-container {
        display: flex;
        flex-wrap: wrap;
        gap: 0.75rem;
        padding: 0 2rem;
        justify-content: center;
        overflow-x: visible;
    }
    
    .tags-container .tag {
        background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        color: white;
        padding: 0.6rem 1.2rem;
        border-radius: 20px;
        text-decoration: none;
        font-weight: 600;
        font-size: 0.9rem;
        box-shadow: 0 2px 8px rgba(66, 134, 198, 0.3);
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        margin-bottom: 0.5rem;
    }
    
    .tags-container-wrapper::after {
        display: none;
    }
}

/* ====== ネイティブタブバー ====== */
@media (max-width: 768px) {
    .native-tab-bar {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px) saturate(180%);
        border-top: 1px solid rgba(0, 0, 0, 0.1);
        padding: calc(env(safe-area-inset-bottom) + 0.5rem) 0 env(safe-area-inset-bottom);
        z-index: 1000;
        display: flex;
        justify-content: space-around;
        align-items: center;
        box-shadow: 0 -2px 20px rgba(0, 0, 0, 0.1);
        
        /* スクロール連動 */
        transform: translateY(0);
        opacity: 1;
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                    opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        will-change: transform, opacity;
    }
    
    .native-tab-bar.tab-bar-visible {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    
    .native-tab-bar.tab-bar-hidden {
        transform: translateY(100%);
        opacity: 0;
        pointer-events: none;
    }
    
    .tab-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 0.25rem;
        padding: 0.5rem;
        color: #8e8e93;
        text-decoration: none;
        transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
        min-width: 60px;
        position: relative;
        border-radius: 12px;
        -webkit-tap-highlight-color: transparent;
    }
    
    .tab-item.active {
        color: var(--primary-color);
        background: rgba(66, 134, 198, 0.1);
    }
    
    .tab-item:active {
        transform: scale(0.95);
        background: rgba(66, 134, 198, 0.15);
    }
    
    .tab-item.active::before {
        content: '';
        position: absolute;
        top: 4px;
        left: 50%;
        transform: translateX(-50%);
        width: 4px;
        height: 4px;
        background: var(--primary-color);
        border-radius: 50%;
        animation: pulse 2s infinite;
    }
    
    @keyframes pulse {
        0%, 100% { opacity: 1; transform: translateX(-50%) scale(1); }
        50% { opacity: 0.6; transform: translateX(-50%) scale(1.2); }
    }
    
    .tab-icon {
        font-size: 1.5rem;
        line-height: 1;
        transition: transform 0.2s ease;
    }
    
    .tab-item.active .tab-icon {
        transform: scale(1.1);
    }
    
    .tab-label {
        font-size: 0.65rem;
        font-weight: 500;
        letter-spacing: 0.02em;
        transition: opacity 0.2s ease;
    }
}

/* PC表示ではタブバー非表示 */
@media (min-width: 769px) {
    .native-tab-bar {
        display: none;
    }
}

/* ====== 検索オプション ====== */
.search-options-section {
    background: var(--card-background);
    padding: 1.5rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    border-bottom: 1px solid rgba(102, 126, 234, 0.1);
}

.search-options-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .search-options-container {
        padding: 0 1rem;
        flex-direction: column;
        gap: 1rem;
    }
    
    .search-option {
        justify-content: space-between;
        width: 100%;
    }
    
    .search-option select {
        flex: 1;
        margin-left: 1rem;
        min-width: auto;
    }
}

.search-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.search-option label {
    font-weight: 600;
    color: var(--text-color);
    font-size: 0.95rem;
    white-space: nowrap;
}

.search-option select {
    padding: 0.6rem 1.2rem;
    border: 2px solid #e1e8ed;
    border-radius: 25px;
    background: white;
    color: var(--text-color);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);
    min-width: 120px;
}

.search-option select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.search-option select:hover {
    border-color: var(--primary-color);
}

/* ダークモード検索オプション */
.dark-mode .search-options-container select {
    padding: 0.8rem;
    background-color: rgba(255,255,255,0.1);
}

/* ====== ダークモード対応 ====== */
.dark-mode .native-tab-bar {
    background: rgba(28, 28, 30, 0.95);
    border-top-color: rgba(255, 255, 255, 0.1);
}

.dark-mode .tab-item {
    color: #8e8e93;
}

.dark-mode .tab-item.active {
    color: var(--primary-color);
    background: rgba(66, 134, 198, 0.2);
}

.dark-mode .tags-container-wrapper::after {
    background: linear-gradient(to left, var(--card-background), transparent);
}