/* ===== Mobile First Responsive Design ===== */

/* Small screens (up to 640px) */
@media (max-width: 640px) {
    /* === Header 優化 === */
    .header-container {
        padding: 0 var(--spacing-3);
        min-height: 3.5rem;
    }
    
    .title {
        display: none;
    }
    
    .auth-buttons {
        flex-direction: row;
        gap: var(--spacing-2);
    }
    
    .auth-buttons .btn {
        padding: var(--spacing-2) var(--spacing-3);
        font-size: var(--font-size-sm);
        flex: 1;
        min-height: 2.5rem;
        touch-action: manipulation;
    }
    
    .user-dropdown {
        right: -50%;
        left: auto;
        min-width: 10rem;
    }
    
    /* === 返回按鈕優化 === */
    .back-btn {
        min-width: 2.5rem;
        min-height: 2.5rem;
        padding: var(--spacing-2);
        touch-action: manipulation;
    }
    
    /* === 首頁功能卡片優化 === */
    .feature-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-4);
        padding: var(--spacing-4);
    }
    
    .feature-card {
        padding: var(--spacing-6);
        min-height: 6rem;
        text-align: center;
        touch-action: manipulation;
    }
    
    .feature-card .btn {
        min-height: 3rem;
        padding: var(--spacing-3) var(--spacing-4);
        font-size: 1rem;
        font-weight: 600;
        touch-action: manipulation;
    }
    
    /* === 預約系統手機版優化 === */
    /* === 預約步驟手機優化：一行壓縮顯示 === */
    /* booking steps: 顯示為水平樹狀線，節點為圓圈數字，只有當前步驟顯示文字 */
    .booking-steps.mobile-one-line {
        position: relative;
    display: flex !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
        align-items: center;
        justify-content: space-between;
        gap: var(--spacing-2);
        padding: var(--spacing-2) var(--spacing-2) var(--spacing-1);
    }

    /* 強制覆寫其他樣式，確保在手機上為水平排列且不換行 */
    .booking-steps.mobile-one-line {
        flex-direction: row !important;
        width: 100% !important;
        white-space: nowrap !important;
    }

    /* 背景的水平線（置於步驟節點之下） */
    .booking-steps.mobile-one-line::before {
        content: "";
        position: absolute;
        left: 12px;
        right: 12px;
        height: 2px;
        background: var(--gray-200);
        top: 50%;
        transform: translateY(-50%);
        z-index: 0;
        border-radius: 2px;
    }

    .booking-steps.mobile-one-line .step {
        position: relative;
        z-index: 1; /* 讓節點置於線之上 */
        display: inline-flex !important;
        flex-direction: column !important;
        align-items: center !important;
        gap: 4px !important;
        flex: 0 0 auto !important;
        padding: 0 6px !important;
        background: transparent;
    }

    /* 圓圈數字樣式（節點） */
    .booking-steps.mobile-one-line .step-number {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        background: var(--gray-300);
        color: white;
        font-weight: 700;
        box-shadow: 0 1px 2px rgba(0,0,0,0.06);
    }

    .booking-steps.mobile-one-line .step.active .step-number {
        background: var(--primary-color);
        color: #fff;
    }

    /* 預設不顯示步驟文字，僅當前步驟顯示 */
    .booking-steps.mobile-one-line .step-text {
        display: none !important;
        font-size: 0.85rem;
        color: var(--gray-700);
        text-align: center;
        max-width: 120px;
    }

    /* 使用者要求：僅顯示數字圓圈，不顯示任何步驟文字 */
    .booking-steps.mobile-one-line .step.active .step-text {
        display: none !important;
    }
    
    .facility-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-3);
    }
    
    .facility-card {
        padding: var(--spacing-4);
        text-align: center;
    }
    
    /* 日期選擇器：改為水平滑動 */
    #date-buttons-container {
        display: flex !important;
        overflow-x: auto;
        gap: var(--spacing-2);
        scroll-snap-type: x proximity;
        padding-bottom: var(--spacing-2);
    }
    #date-buttons-container::-webkit-scrollbar { height: 6px; }
    #date-buttons-container::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 3px; }
    #date-buttons-container .date-button {
        flex: 0 0 auto;
        width: 80px;
        scroll-snap-align: start;
        padding: var(--spacing-2) var(--spacing-2) !important;
        min-height: 3.5rem;
    }
    /* today 標籤顯示在按鈕下方，且較小的字體 */
    #date-buttons-container .today-label {
        font-size: 0.7rem;
        margin-top: 2px;
        color: var(--gray-500);
    }
    
    /* 休館日標籤 */
    #date-buttons-container .closed-label {
        font-size: 0.65rem;
        margin-top: 2px;
        line-height: 1.2;
    }
    
    .date-button .text-sm,
    .date-button .text-base {
        font-size: 0.875rem !important;
    }
    
    .date-button .text-xs {
        font-size: 0.75rem !important;
        margin-top: 0.25rem;
    }
    
    /* 時段選擇器：改為 2 列 x 3 行 (每頁最多6個，自動換行) */
    .timeslots-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr) !important;
        gap: var(--spacing-2);
    }
    .timeslot-card { min-height: 3.5rem; padding: var(--spacing-3); }
    
    .timeslot-card {
        padding: var(--spacing-4);
        min-height: 4rem;
        font-size: 1rem;
        touch-action: manipulation;
    }
    
    /* 設施卡片手機版 */
    .facility-card {
        padding: var(--spacing-5);
        min-height: 5rem;
        touch-action: manipulation;
    }
    
    .facility-icon {
        font-size: 2rem;
        margin-bottom: var(--spacing-2);
    }
    
    /* 步驟操作按鈕手機版 */
    .step-actions {
        flex-direction: column;
        gap: var(--spacing-2);
    }
    
    .step-actions .btn {
        width: 100%;
        padding: var(--spacing-3);
    }
    
    /* === 表單優化 === */
    .auth-container {
        margin: var(--spacing-2);
        padding: var(--spacing-4);
        max-width: 100%;
        width: 100%;
        border-radius: var(--border-radius);
    }
    
    .auth-page.active {
        display: flex !important;
        align-items: center;
        justify-content: center;
        min-height: calc(100vh - 120px);
        padding: var(--spacing-4) var(--spacing-2);
    }
    
    /* === 輸入欄位優化 === */
    .form-control,
    input[type="text"],
    input[type="email"],
    input[type="tel"],
    input[type="password"],
    input[type="date"],
    select {
        min-height: 3rem;
        padding: var(--spacing-3);
        font-size: 1rem;
        border-radius: var(--border-radius);
        touch-action: manipulation;
    }
    
    .form-label {
        font-size: 1rem;
        font-weight: 500;
        margin-bottom: var(--spacing-2);
    }
    
    /* === 按鈕優化 === */
    .btn {
        min-height: 3rem;
        padding: var(--spacing-3) var(--spacing-4);
        font-size: 1rem;
        font-weight: 500;
        border-radius: var(--border-radius);
        touch-action: manipulation;
        border: none;
        cursor: pointer;
    }
    
    .btn-primary {
        background-color: var(--primary-color);
        color: white;
    }
    
    .btn-secondary {
        background-color: var(--secondary-color);
        color: var(--text-color);
    }
    
    /* === CAPTCHA 優化 === */
    .captcha-container {
        display: flex;
        align-items: center;
        gap: var(--spacing-3);
        margin: var(--spacing-3) 0;
    }
    
    .captcha-image {
        max-width: 150px;
        height: auto;
        border: 1px solid var(--border-color);
        border-radius: var(--border-radius);
        touch-action: manipulation;
    }
    
    .captcha-input {
        flex: 1;
        min-height: 3rem;
    }
    
    /* === 設施編號卡片優化 === */
    .facility-numbers-grid {
        grid-template-columns: repeat(3, 1fr) !important;
        gap: var(--spacing-3);
        margin: var(--spacing-4) 0;
    }
    
    .facility-number-card {
        min-height: 3.5rem;
        padding: var(--spacing-3);
        font-size: 1.1rem;
        font-weight: 600;
        border-radius: var(--border-radius);
        text-align: center;
        touch-action: manipulation;
        cursor: pointer;
        transition: all 0.2s ease;
    }
    
    .facility-number-card:hover,
    .facility-number-card:active {
        transform: scale(0.98);
    }
    
    /* === 預約摘要優化 === */
    .summary-card {
        padding: var(--spacing-4);
        margin: var(--spacing-3) 0;
        border-radius: var(--border-radius);
        background: var(--background-light);
    }
    
    .summary-item {
        margin: var(--spacing-3) 0;
        padding: var(--spacing-2) 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    .summary-label {
        font-size: 0.9rem;
        color: var(--text-muted);
        margin-bottom: var(--spacing-1);
    }
    
    .summary-value {
        font-size: 1.1rem;
        font-weight: 500;
        color: var(--text-color);
    }
    
    /* === 查詢結果優化 === */
    .space-y-4 > div {
        margin-bottom: var(--spacing-4);
        padding: var(--spacing-4);
        border-radius: var(--border-radius);
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    }
    
    /* === 通知系統優化 === */
    .notification {
        padding: var(--spacing-3) var(--spacing-4);
        font-size: 1rem;
        border-radius: var(--border-radius);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        max-width: calc(100vw - 2rem);
        margin: 0 1rem;
    }
    
    /* === 用戶下拉選單優化 === */
    .user-menu {
        position: relative;
    }
    
    .user-dropdown {
        position: absolute;
        top: 100%;
        right: 0;
        min-width: 12rem;
        max-width: 90vw;
        z-index: 1000;
        background: white;
        border: 1px solid var(--border-color);
        border-radius: var(--border-radius);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    }
    
    .user-dropdown .dropdown-item {
        padding: var(--spacing-3);
        font-size: 1rem;
        touch-action: manipulation;
    }
    
    /* === 改善觸控體驗 === */
    * {
        -webkit-tap-highlight-color: transparent;
        -webkit-touch-callout: none;
        -webkit-user-select: none;
        user-select: none;
    }
    
    input, textarea, select {
        -webkit-user-select: text;
        user-select: text;
    }
    
    /* === 防止縮放 === */
    input[type="text"],
    input[type="email"],
    input[type="tel"],
    input[type="password"] {
        font-size: 16px !important; /* 防止iOS縮放 */
    }
    
    .sport-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-3);
    }
    
    .sport-card {
        padding: var(--spacing-4);
    }
    
    .sport-icon {
        font-size: 1.5rem;
    }
    
    .date-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-2);
    }
    
    .date-card {
        padding: var(--spacing-2);
        min-height: 3rem;
    }
    
    .time-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-2);
    }
    
    .time-slot {
        padding: var(--spacing-3);
        min-height: 3rem;
    }
    
    .booking-actions {
        flex-direction: column;
    }
    
    .booking-item {
        flex-direction: column;
        gap: var(--spacing-3);
    }
    
    .booking-actions {
        align-self: flex-end;
    }
    
    .success-actions {
        flex-direction: column;
    }
    
    .query-actions {
        flex-direction: column;
    }
    
    .inquiry-actions {
        flex-direction: column;
    }
    
    .modal-content {
        margin: var(--spacing-4);
        width: calc(100% - 2rem);
    }
    
    .modal-actions {
        flex-direction: column;
        gap: var(--spacing-2);
    }
    
    .auth-container {
        margin: var(--spacing-4);
        padding: var(--spacing-6);
    }
    
    .bookings-header {
        flex-direction: column;
        gap: var(--spacing-3);
        align-items: flex-start;
    }
    
    .bookings-tabs {
        width: 100%;
        overflow-x: auto;
        white-space: nowrap;
        padding-bottom: var(--spacing-2);
    }
    
    .tab-btn {
        flex-shrink: 0;
    }
    
    .progress-steps {
        flex-direction: column;
        gap: var(--spacing-2);
    }
    
    .step-connector {
        width: 2px;
        height: 2rem;
    }
    
    .welcome-section {
        padding: var(--spacing-8) var(--spacing-4);
    }
    
    .welcome-section h1 {
        font-size: var(--font-size-2xl);
    }
    
    .welcome-section p {
        font-size: var(--font-size-base);
    }
}

/* Medium screens (641px to 768px) */
@media (min-width: 641px) and (max-width: 768px) {
    .sport-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .date-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .time-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .booking-item {
        flex-direction: row;
    }
    
    .booking-actions {
        flex-direction: row;
    }
    
    /* 平板版預約優化 */
    .date-buttons-container {
        grid-template-columns: repeat(4, 1fr) !important;
        gap: var(--spacing-3);
    }
    
    .facility-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .timeslots-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    
    .booking-steps {
        justify-content: center;
        overflow-x: visible;
    }
    
    .step {
        min-width: auto;
    }
}

/* Large screens (769px to 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
    .sport-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .date-grid {
        grid-template-columns: repeat(5, 1fr);
    }
    
    .time-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .container {
        padding: 0 var(--spacing-6);
    }
}

/* Extra large screens (1025px and up) */
@media (min-width: 1025px) {
    .sport-grid {
        grid-template-columns: repeat(5, 1fr);
    }
    
    .date-grid {
        grid-template-columns: repeat(7, 1fr);
    }
    
    .time-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .container {
        padding: 0 var(--spacing-8);
    }
    
    .feature-card:hover {
        transform: translateY(-8px);
    }
    
    .sport-card:hover {
        transform: translateY(-4px);
    }
}

/* ===== Touch Device Optimizations ===== */
@media (hover: none) and (pointer: coarse) {
    .btn {
        padding: var(--spacing-4) var(--spacing-6);
        min-height: 44px;
    }
    
    .sport-card {
        min-height: 120px;
    }
    
    .time-slot {
        min-height: 60px;
    }
    
    .date-card {
        min-height: 60px;
    }
    
    .dropdown-item {
        padding: var(--spacing-3) var(--spacing-4);
        min-height: 44px;
    }
    
    .tab-btn {
        padding: var(--spacing-3) var(--spacing-4);
        min-height: 44px;
    }
}

/* ===== Print Styles ===== */
@media print {
    .header,
    .back-btn,
    .auth-buttons,
    .user-menu,
    .booking-actions,
    .success-actions,
    .query-actions,
    .inquiry-actions {
        display: none !important;
    }
    
    .main-content {
        padding-top: 0;
    }
    
    .page {
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }
    
    body {
        background: white;
    }
    
    .card,
    .booking-section,
    .auth-container {
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }
}

/* ===== High Contrast Mode Support ===== */
@media (prefers-contrast: high) {
    :root {
        --gray-50: #ffffff;
        --gray-100: #f0f0f0;
        --gray-200: #e0e0e0;
        --gray-300: #c0c0c0;
        --gray-400: #808080;
        --gray-500: #606060;
        --gray-600: #404040;
        --gray-700: #202020;
        --gray-800: #101010;
        --gray-900: #000000;
    }
    
    .btn {
        border: 2px solid currentColor;
    }
    
    .card,
    .booking-section,
    .auth-container {
        border: 2px solid var(--gray-400);
    }
}

/* ===== Reduced Motion Support ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .fade-in,
    .slide-in,
    .pulse {
        animation: none;
    }
    
    .page.active {
        animation: none;
    }
}

/* ===== Dark Mode Support (準備好但不啟用) ===== */
@media (prefers-color-scheme: dark) {
    /* 為未來的深色模式準備，目前註解掉 */
    /*
    :root {
        --gray-50: #0f1419;
        --gray-100: #1c2128;
        --gray-200: #30363d;
        --gray-300: #484f58;
        --gray-400: #6e7681;
        --gray-500: #8b949e;
        --gray-600: #b1bac4;
        --gray-700: #c9d1d9;
        --gray-800: #e6edf3;
        --gray-900: #f0f6fc;
    }
    
    body {
        background-color: var(--gray-50);
        color: var(--gray-800);
    }
    */
}

/* ===== Focus Visible Support ===== */
.btn:focus-visible,
.sport-card:focus-visible,
.date-card:focus-visible,
.time-slot:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ===== Accessibility Improvements ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ===== Loading State Responsive ===== */
@media (max-width: 640px) {
    .spinner {
        width: 1rem;
        height: 1rem;
    }
    
    .loading-text {
        font-size: var(--font-size-sm);
    }
}

/* ===== Notification Responsive ===== */
@media (max-width: 640px) {
    .notification {
        left: var(--spacing-2);
        right: var(--spacing-2);
        top: calc(4rem + var(--spacing-2));
        width: auto;
    }
}