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

html {
    scroll-behavior: smooth;
    font-family: Arial, Helvetica, sans-serif;
}

/* commom */
.row {
    margin-left: -8px;
    margin-right: -8px;
}

.row::after {
    content: "";
    display: block;
    clear: both;
}

.col {
    float: left;
    padding-left: 8px;
    padding-right: 8px;
}

.col-half {
    width: 50%;
}

.col-full {
    width: 100%;
}

.col-third {
    width: 33.33%;
}

.mt-8 {
    margin-top: 8px !important;
}

.mt-16 {
    margin-top: 16px !important;
}

.clear {
    clear: both; /*sửa lỗi float các element con bị tách ra với element bố*/
}

.take-white {
    color: #fff !important;
}

.text-center {
    text-align: center !important;
}

.pull-right {
    float: right !important;
}

.btn {
    background-color: #000;
    color: #fff;
    text-decoration: none;
    padding: 11px 16px;
    display: inline-block;
    margin-top: 16px;
    border: none;
    cursor: pointer;
    text-align: center;
    appearance: none; /* fix lỗi display css trên các trình duyệt khác */
    -webkit-appearance: none; /* fix lỗi display css trên các trình duyệt phone khác */
}

.btn:hover {
    background-color: #ccc;
    color: #000;
}

/* MAIN */

/* Header */
#header {
    position: fixed; /*nav luôn nằm ở đầu trang scroll*/
    top: 0;
    left: 0;
    right: 0;
    height: 46px;
    background-color: #000;
    z-index: 1; /*nổi lên khi zoom slider*/
}

#nav {
    display: inline-block;
}

#nav, .subnav {
    list-style-type: none;
}

#nav > li {
    display: inline-block;
}

#nav li {
    position: relative;
}

#nav > li > a {
    color: #fff;
    text-transform: uppercase;
}

#nav li a {
    text-decoration: none;
    padding: 0 24px;
    line-height: 46px;
    display: block;
}

#nav li:hover .subnav {
    display: block;
}

#nav > li:hover > a,
#nav .subnav li:hover a {
    background-color: #ccc;
    color: #000;
}

#nav .subnav {  
    position: absolute;
    min-width: 160px;
    top: 100%;
    left: 0;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
    display: none;
}

#nav .subnav a {
    color: #000;
    padding: 0 12px;
    line-height: 38px;
}

#header .mobile-menu-btn {
    position: absolute;
    top: 0;
    right: 0;
    display: none;
}

#header .mobile-menu-btn,
#header .search-btn {
    float: right; /*làm mất thuộc tính khối của nav*/
    padding: 0 21px;

}

#header .search-btn:hover {
    cursor: pointer;
    background-color: #f44336;
}

#header .mobile-menu-btn:hover {
    background-color: #ccc;
}

#header .mobile-menu-btn:hover .menu-icon {
    color: #000;
}

#header .menu-icon,
#header .search-icon {
    font-size: 20px;
    color: #fff;
    line-height: 46px;
}

/* Slider */
#slider {
    position: relative;
    margin-top: 46px;
    padding-top: 50%;
    background: url('https://images.unsplash.com/photo-1602940659805-770d1b3b9911?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1032&q=80') top center / cover no-repeat;
}

#slider .text-content {
    position: absolute;
    width: 100%;
    text-align: center;
    color: #fff;
    bottom: 47px;
}

#slider .content-heading {
    font-weight: 500;
    font-size: 24px;
}

#slider .content-description {
    font-size: 13px;
    margin-top: 25px;
    text-shadow: 0 0 1px #000; /*đổ bóng text không bị mờ khi background cùng màu */
}

/* Content */
#container .content-section {
    width: 800px;
    max-width: 100%;
    padding: 64px 0 112px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 16px;
    padding-right: 16px;
}

#container .section-heading {
    font-size: 30px;
    text-align: center;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 4px; /*khoảng cách giữa các chữ cái*/
}

#container .section-sub-heading {
    font-size: 15px;
    font-style: italic;
    text-align: center;
    margin-top: 25px;
    opacity: 0.6;
}

#container .about-content {
    font-size: 15px;
    margin-top: 25px;
    text-align: justify; /*canh đều*/
    line-height: 1.4;
}

#container .member-list {
    margin-top: 32px;
}

#container .member-name {
    font-size: 13px;
}

#container .member-img {
    width: 154px;
    margin-top: 15px;
    border-radius: 4px;
}

/* Tour */
.tour-section {
    background-color: #000;
}

.tickets-list {
    background-color: #fff;
    margin-top: 40px;
    list-style: none;
}

.tickets-list li {
    color: #757575;
    font-size: 15px;
    padding: 11px 16px;
    border-bottom: 1px solid #ddd;
}

.tickets-list .sold-out {
    background-color: #f44336;
    color: #fff;
    padding: 3px 4px;
    margin-left: 16px;
}

.tickets-list .quantity {
    float: right;
    margin-top: -3px;
    width: 24px;
    height: 24px;
    background-color: #000;
    color: #fff;
    border-radius: 50%;
    text-align: center; 
    line-height: 24px;
}

/* Place */
.places-list {
    margin-top: 16px;
}

.place-img {
    width: 100%;
    display: block;
}

.place-img:hover {
    opacity: 0.6;
}

.place-body {
    background-color: #fff;
    padding: 16px;
    font-size: 15px;
}

.place-heading {
    font-size: 15px;
    font-weight: 600;
}

.place-time {
    margin-top: 15px;
    color: #757575;
}

.place-desc {
    margin-top: 15px;
    line-height: 1.4;
}

/* Contact form */
.contact-content {
    margin-top: 36px;
}

.contact-info {
    font-size: 18px;
    line-height: 1.5;
}

.contact-info i[class*="fa-"] {
    width: 30px;
    display: inline-block;
}

.contact-info a {
    color: #101aef;
    opacity: 0.8;
}

.contact-info a:hover {
    opacity: 1;
}

.contact-form {
    font-size: 15px;
}

.contact-form .form-control {
    padding: 10px;
    border: 1px solid #ccc;
    width: 100%;
}

/* Map section */
.map-section img {
    width: 100%;
}

#footer {
    padding: 64px 16px;
    text-align: center;
}

#footer .socials-list {
    font-size: 24px;
}

#footer .socials-list a,
#footer .copyright a {
    color: rgba(0, 0, 0, 0.6);
}

#footer .socials-list a:hover {
    color: rgba(0, 0, 0, 0.3);
}

#footer .copyright {
    margin-top: 14px;
    color: rgba(0, 0, 0, 0.6);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    bottom: 0;
    right: 0;
    left: 0;
    background-color: rgba(0, 0, 0, 0.3);
    display: none;
    align-items: center;
    justify-content: center;
}

.open {
    display: flex;
}

.modal-container {
    background-color: #fff;
    width: 900px;
    max-width: calc(100% - 32px);
    min-height: 200px;
    position: relative;
    animation: modalFadeIn ease 0.5s;
}

.modal-header {
    background-color: #009688;
    height: 130px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    color: #fff;
    letter-spacing: 4px;
}

.modal-heading-icon {
    margin-right: 16px;
}

.modal-close {
    position: absolute;
    top: 0;
    right: 0;
    color: #fff;
    padding: 12px;
    cursor: pointer;
    opacity: 0.8;
}

.modal-close:hover {
    opacity: 1;
}

.modal-body {
    padding: 16px;
}

.modal-label {
    display: block;
    font-size: 15px;
    margin-bottom: 12px;
}

.modal-input {
    border: 1px solid #ccc;
    width: 100%;
    padding: 10px;
    font-size: 15px;
    margin-bottom: 24px;
}

#buy-tickets {
    background-color: #009688;
    color: #fff;
    border: none;
    width: 100%;
    font-size: 15px;
    padding: 17px;
    text-transform: uppercase;
    cursor: pointer;
}

#buy-tickets:hover {
    background-color: #ddd;
    color: #000;
}

.modal-footer {
    padding: 16px;
    text-align: right;
}

.modal-footer a {
    color: #2196f3;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(-150px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}