/**
 * PWAインストールポップアップ スタイル
 *
 * NOTE: `.pwa-ios-modal` は旧手順モーダル用（未使用）。
 * フロー: バナー（`.pwa-install-banner`）→ ネイティブ install prompt。
 *         不可時は `.pwa-s9-access-*` の代替手段ボトムシート。
 */

/* 1 行ヒント: ネイティブ install API が使えない時に「どこを押すか」だけを最小限示す。
   旧 .pwa-ios-modal（手順説明モーダル）の代替で、自動的に消える小さなトースト。 */
.pwa-install-hint {
    position: fixed;
    left: 50%;
    bottom: 28px;
    transform: translate(-50%, 140%);
    background: rgba(20, 22, 28, 0.94);
    color: #fff;
    padding: 12px 18px;
    border-radius: 999px;
    font-size: 13px;
    line-height: 1.4;
    white-space: nowrap;
    max-width: calc(100vw - 24px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
    z-index: 100020;
    transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.2s ease;
    opacity: 0;
    pointer-events: none;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
}

.pwa-install-hint.show {
    transform: translate(-50%, 0);
    opacity: 1;
    pointer-events: auto;
}

.pwa-install-hint.pwa-install-hint--top {
    bottom: auto;
    top: 56px;
    transform: translate(-50%, -140%);
}

.pwa-install-hint.pwa-install-hint--top.show {
    transform: translate(-50%, 0);
}

.pwa-install-hint .pwa-hint-arrow {
    display: inline-block;
    margin-right: 6px;
    color: #6ee7b7;
    font-weight: bold;
    animation: pwaHintArrowBounce 1.4s ease-in-out infinite;
}

.pwa-install-hint .pwa-hint-key {
    display: inline-block;
    margin: 0 2px;
    padding: 1px 8px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.16);
    color: #fff;
    font-weight: 600;
}

@keyframes pwaHintArrowBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(3px); }
}

/* ========== 代替アクセス（ホーム追加が難しい環境）ボトムシート ========== */
.pwa-s9-access-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 100029;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.pwa-s9-access-backdrop.pwa-s9-access-backdrop--show {
    opacity: 1;
    visibility: visible;
}

.pwa-s9-access-panel {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    max-height: min(88vh, 520px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    background: #fafafa;
    border-radius: 18px 18px 0 0;
    box-shadow: 0 -12px 40px rgba(0, 0, 0, 0.18);
    z-index: 100030;
    transform: translateY(105%);
    transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1);
    color: #1f2937;
}

.pwa-s9-access-panel.pwa-s9-access-panel--show {
    transform: translateY(0);
}

.pwa-s9-access-panel-inner {
    padding: 20px 18px 12px;
}

.pwa-s9-access-title {
    margin: 0 0 10px;
    font-size: 17px;
    font-weight: 700;
    color: #312e81;
}

.pwa-s9-access-lead {
    margin: 0 0 14px;
    font-size: 13px;
    line-height: 1.55;
    color: #4b5563;
}

.pwa-s9-access-inapp {
    margin: 0 0 14px;
    padding: 10px 12px;
    font-size: 12px;
    line-height: 1.5;
    background: #fef3c7;
    border: 1px solid #fcd34d;
    border-radius: 10px;
    color: #78350f;
}

.pwa-s9-access-tip {
    margin: 0 0 12px;
    padding: 10px 12px;
    font-size: 12px;
    line-height: 1.5;
    background: #eef2ff;
    border-radius: 10px;
    color: #3730a3;
}

/* Pixel / Android Chrome 用の確実な手順カード（ホーム追加用） */
.pwa-s9-access-android-steps {
    margin: 0 0 14px;
    padding: 12px 14px;
    background: #ecfeff;
    border: 1px solid #67e8f9;
    border-radius: 12px;
    color: #155e75;
    font-size: 13px;
    line-height: 1.55;
}

.pwa-s9-access-android-steps-title {
    margin: 0 0 8px;
    font-size: 13px;
    color: #0e7490;
}

.pwa-s9-access-android-list {
    margin: 0 0 8px;
    padding-left: 20px;
}

.pwa-s9-access-android-list li {
    margin: 2px 0;
}

.pwa-s9-access-android-fallback {
    margin: 6px 0 0;
    padding-top: 8px;
    border-top: 1px dashed #a5f3fc;
    font-size: 12px;
    color: #155e75;
}

/* 「すでにインストール済み」警告ブロック */
.pwa-s9-access-installed {
    margin: 0 0 14px;
    padding: 12px 14px;
    background: #fff7ed;
    border: 1px solid #fdba74;
    border-radius: 12px;
    color: #9a3412;
}

.pwa-s9-access-installed-title {
    margin: 0 0 6px;
    font-size: 13px;
}

.pwa-s9-access-installed-body {
    margin: 0;
    font-size: 12px;
    line-height: 1.55;
    color: #7c2d12;
}

.pwa-s9-access-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.pwa-s9-access-btn {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    background: #fff;
    text-align: left;
    cursor: pointer;
    font: inherit;
    color: inherit;
    transition: border-color 0.15s ease, background 0.15s ease;
}

.pwa-s9-access-btn:hover {
    border-color: #a5b4fc;
    background: #f8fafc;
}

.pwa-s9-access-btn--link {
    text-decoration: none;
    box-sizing: border-box;
}

.pwa-s9-access-btn-label {
    font-size: 14px;
    font-weight: 600;
    color: #1e1b4b;
}

.pwa-s9-access-btn-hint {
    margin-top: 4px;
    font-size: 11px;
    color: #6b7280;
    line-height: 1.4;
}

.pwa-s9-access-close {
    display: block;
    width: calc(100% - 36px);
    margin: 8px 18px 18px;
    padding: 12px;
    border: none;
    border-radius: 12px;
    background: #e5e7eb;
    font-size: 14px;
    font-weight: 600;
    color: #374151;
    cursor: pointer;
}

.pwa-s9-access-close:hover {
    background: #d1d5db;
}

/* インストールバナー（画面下部） */
.pwa-install-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, #818cf8 0%, #4338ca 100%);
    color: white;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    z-index: 100010;
    box-shadow: 0 -8px 24px rgba(67, 56, 202, 0.25);
    transform: translateY(100%);
    transition: transform 0.3s ease-out;
}

.pwa-install-banner.show {
    transform: translateY(0);
}

.pwa-install-banner .pwa-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    flex-shrink: 0;
}

.pwa-install-banner .pwa-content {
    flex: 1;
    min-width: 0;
}

.pwa-install-banner .pwa-title {
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 4px;
}

.pwa-install-banner .pwa-desc {
    font-size: 13px;
    opacity: 0.9;
}

.pwa-install-banner .pwa-buttons {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

.pwa-install-banner .pwa-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 20px;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
}

.pwa-install-banner .pwa-btn-install {
    background: white;
    color: #4338ca;
}

.pwa-install-banner .pwa-btn-install:hover {
    background: #f0f0f0;
    transform: scale(1.05);
}

.pwa-install-banner .pwa-btn-close {
    background: rgba(255,255,255,0.2);
    color: white;
}

.pwa-install-banner .pwa-btn-close:hover {
    background: rgba(255,255,255,0.3);
}

/* iOS用の手順説明モーダル */
.pwa-ios-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100011;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    padding: 20px;
}

.pwa-ios-modal.show {
    opacity: 1;
    visibility: visible;
}

.pwa-ios-modal .pwa-ios-content {
    background: white;
    border-radius: 20px;
    padding: 28px;
    max-width: 340px;
    width: 100%;
    text-align: center;
    color: #333;
    transform: scale(0.9);
    transition: transform 0.3s;
}

.pwa-ios-modal.show .pwa-ios-content {
    transform: scale(1);
}

.pwa-ios-modal .pwa-ios-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.pwa-ios-modal .pwa-ios-title {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 20px;
    color: #4338ca;
}

.pwa-ios-modal .pwa-ios-steps {
    text-align: left;
    margin-bottom: 24px;
}

.pwa-ios-modal .pwa-ios-step {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid #eee;
}

.pwa-ios-modal .pwa-ios-step:last-child {
    border-bottom: none;
}

.pwa-ios-modal .pwa-step-num {
    width: 28px;
    height: 28px;
    background: #6366f1;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
    flex-shrink: 0;
}

.pwa-ios-modal .pwa-step-text {
    font-size: 14px;
    line-height: 1.5;
    padding-top: 4px;
}

.pwa-ios-modal .pwa-step-text .icon {
    display: inline-block;
    background: #eee;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 16px;
}

.pwa-ios-modal .pwa-ios-close {
    width: 100%;
    padding: 14px;
    background: #6366f1;
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.18s cubic-bezier(0.4,0,0.2,1);
}

.pwa-ios-modal .pwa-ios-close:hover {
    background: #4f46e5;
}

/* モバイル最適化 */
@media (max-width: 480px) {
    .pwa-install-banner {
        flex-wrap: wrap;
        padding: 14px 16px;
        gap: 12px;
    }
    
    .pwa-install-banner .pwa-icon {
        width: 40px;
        height: 40px;
    }
    
    .pwa-install-banner .pwa-content {
        flex: 1 1 calc(100% - 56px);
    }
    
    .pwa-install-banner .pwa-title {
        font-size: 15px;
    }
    
    .pwa-install-banner .pwa-desc {
        font-size: 12px;
    }
    
    .pwa-install-banner .pwa-buttons {
        width: 100%;
        justify-content: stretch;
    }
    
    .pwa-install-banner .pwa-btn {
        flex: 1;
        padding: 12px 16px;
    }
}