:root {
    --primary: #4a90e2;
    --primary-dark: #3a7bc8;
    --light-bg: #f8f9fa;
    --border: #e3e7ee;
    --text: #333;
    --text-light: #666;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-size: 14px;
    font-family: 'Inter', sans-serif;
}

/* 基礎樣式 */
.spa-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 16px 40px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text);
}

/* 商家資訊 */
.spa-header {
    display: flex;
    gap: 32px;
    margin-bottom: 40px;
    padding: 24px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.spa-header img {
    width: 350px;
    height: 250px;
    border-radius: 8px;
    object-fit: cover;
}

.spa-info {
    flex: 1;
}

.spa-info h1 {
    font-size: 24px;
    margin-bottom: 8px;
    font-weight: 600;
    color: #2c3e50;
}

.spa-info .rating {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 16px;
    color: #f39c12;
    font-size: 32px;
}

.spa-info p {
    color: var(--text-light);
    line-height: 1.6;
    padding: 12px;
    background: var(--light-bg);
    border-radius: 6px;
    font-size: 15px;
}

/* 預約主容器 */
.calendar-box {
    background: white;
    border-radius: 12px;
    padding: 28px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.calendar-box h2 {
    font-size: 18px;
    margin: 24px 0 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
    color: #2c3e50;
    font-weight: 600;
}

.calendar-box h2:first-child {
    margin-top: 0;
}

/* 預約者資料 */
.user_box {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.user_box label {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.user_box span {
    font-size: 14px;
    color: var(--text-light);
    font-weight: 500;
}

.user_box input {
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 15px;
    transition: border-color 0.2s;
}

.user_box input:focus {
    outline: none;
    border-color: var(--primary);
}

/* 服務選擇 */
.service-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 12px;
    margin-bottom: 24px;
}

.service-item {
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    background: white;
}

.service-item:hover {
    border-color: var(--primary);
    box-shadow: 0 2px 6px rgba(74, 144, 226, 0.1);
}

.service-item.active {
    border-color: var(--primary);
    background: #eef5ff;
}

.service-item strong {
    display: block;
    font-size: 16px;
    margin-bottom: 4px;
    color: #2c3e50;
}

.service-item div {
    display: flex;
    justify-content: space-between;
    color: var(--text-light);
    font-size: 14px;
}

/* 日期時間選擇 */
#myDatePicker,
#myTimePicker {
    display: none;
    width: 100%;
    max-width: 300px;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 15px;
    margin-bottom: 8px;
    background: white;
}

#myDatePicker:focus,
#myTimePicker:focus {
    outline: none;
    border-color: var(--primary);
}

.flatpickr-calendar.inline {
    max-width: 100%;
}

.flatpickr-innerContainer {
    overflow: auto !important;
}

.select-booking-time {
    display: flex;
    flex-wrap: wrap;
}

.select-booking-time > div {
    min-width: 50%;
}

/* 選擇顯示 */
.select-display {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    padding: 16px;
    background: var(--light-bg);
    border-radius: 8px;
    margin: 24px 0;
    font-size: 18px;
    align-items: center;
    justify-content: center;
}

.select-display span {
    font-weight: 500;
    color: var(--primary);
    background: white;
    padding: 6px 12px;
    border-radius: 6px;
    border: 1px solid var(--border);
    min-height: 2.5rem;
    min-width: 8rem;
    text-align: center;
    line-height: 1.5;
    vertical-align: middle;
}

/* 預約按鈕 */
.reserve-btn {
    width: 300px;
    padding: 14px 24px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
    margin: 8px auto 0;
    display: block;
}

.reserve-btn:hover {
    background: var(--primary-dark);
}

.reserve-btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.2);
}

/* 響應式 */
@media (max-width: 768px) {
    .spa-header {
        flex-direction: column;
        gap: 20px;
        padding: 20px;
    }

    .spa-header img {
        width: 100%;
        height: auto;
        max-height: 300px;
    }

    .spa-info h1 {
        font-size: 20px;
    }

    .user_box {
        grid-template-columns: 1fr;
    }

    .service-list {
        grid-template-columns: 1fr;
    }

    .calendar-box {
        padding: 20px;
    }

    .select-booking-time > div {
        width: 100%;
    }

    .flatpickr-calendar.inline {
        margin: auto;
    }

    .select-display {
        flex-direction: column;
        gap: 8px;
    }

    .reserve-btn {
        width: 100%;
    }
}