/**
 * Utility Classes - Thay thế Bootstrap
 * Chỉ bao gồm các class cần thiết được sử dụng trong theme
 */

/* ============================================
   Container & Grid System
   ============================================ */

   .container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 15px;
    padding-right: 15px;
    box-sizing: border-box;
}

/* Responsive container */
@media (min-width: 576px) {
    .container {
        max-width: 540px;
    }
}

@media (min-width: 768px) {
    .container {
        max-width: 720px;
        padding-left: 20px;
        padding-right: 20px;
    }
}

@media (min-width: 992px) {
    .container {
        max-width: 960px;
    }
}

@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }
}

/* Row */
.row {
    display: flex;
    flex-wrap: wrap;
    margin-left: -15px;
    margin-right: -15px;
}

.row.equal-height {
    display: flex;
    flex-wrap: wrap;
}

.row.equal-height > [class*='col-'] {
    display: flex;
    flex-direction: column;
}

/* Columns */
[class*='col-'] {
    position: relative;
    width: 100%;
    padding-left: 15px;
    padding-right: 15px;
    box-sizing: border-box;
}

/* Extra Small (xs) - Mobile */
.col-xs-12 {
    flex: 0 0 100%;
    max-width: 100%;
}

/* Small (sm) - Tablet */
@media (min-width: 768px) {
    .col-sm-6 {
        flex: 0 0 50%;
        max-width: 50%;
    }
}

/* Medium (md) - Desktop */
@media (min-width: 992px) {
    .col-md-3 {
        flex: 0 0 25%;
        max-width: 25%;
    }
    
    .col-md-4 {
        flex: 0 0 33.333333%;
        max-width: 33.333333%;
    }
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-block;
    padding: 10px 20px;
    margin-bottom: 0;
    font-size: 14px;
    font-weight: 400;
    line-height: 1.42857143;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
    border-radius: 4px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-sizing: border-box;
}

.btn:hover,
.btn:focus {
    text-decoration: none;
    outline: none;
}

.btn:active {
    outline: 0;
    box-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);
}

.btn-primary {
    color: #fff;
    background-color: #337ab7;
    border-color: #2e6da4;
}

.btn-primary:hover,
.btn-primary:focus {
    color: #fff;
    background-color: #286090;
    border-color: #204d74;
}

.btn-default {
    color: rgb(55, 65, 81);
    background-color: #fff;
    border-color: #ccc;
}

.btn-default:hover,
.btn-default:focus {
    color: rgb(55, 65, 81);
    background-color: #e6e6e6;
    border-color: #adadad;
}

.btn-sm {
    padding: 5px 10px;
    font-size: 12px;
    line-height: 1.5;
    border-radius: 3px;
}

.btn-link {
    color: #337ab7;
    font-weight: normal;
    border-radius: 0;
    background-color: transparent;
    border: none;
}

.btn-link:hover,
.btn-link:focus {
    color: #23527c;
    text-decoration: underline;
    background-color: transparent;
}

/* ============================================
   Forms
   ============================================ */

.form-control {
    display: block;
    width: 100%;
    height: 34px;
    padding: 6px 12px;
    font-size: 14px;
    line-height: 1.42857143;
    color: rgb(55, 65, 81);
    background-color: #fff;
    background-image: none;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
    transition: border-color ease-in-out 0.15s, box-shadow ease-in-out 0.15s;
    box-sizing: border-box;
}

.form-control:focus {
    border-color: #66afe9;
    outline: 0;
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(102, 175, 233, 0.6);
}

.form-inline {
    display: flex;
    align-items: center;
    gap: 10px;
}

.form-group {
    margin-bottom: 15px;
}

/* ============================================
   Navbar
   ============================================ */

.navbar {
    position: relative;
    min-height: 50px;
    margin-bottom: 20px;
    border: 1px solid transparent;
}

.navbar-default {
    background-color: #f8f8f8;
    border-color: #e7e7e7;
}

.navbar-header {
    float: left;
}

@media (min-width: 768px) {
    .navbar-header {
        float: none;
    }
}

.navbar-brand {
    float: left;
    padding: 15px 15px;
    font-size: 18px;
    line-height: 20px;
    height: 50px;
    text-decoration: none;
}

.navbar-brand:hover,
.navbar-brand:focus {
    text-decoration: none;
}

.navbar-toggle {
    position: relative;
    float: right;
    padding: 9px 10px;
    margin-top: 8px;
    margin-right: 15px;
    margin-bottom: 8px;
    background-color: transparent;
    background-image: none;
    border: 1px solid transparent;
    border-radius: 4px;
}

.navbar-toggle:focus {
    outline: 0;
}

.navbar-toggle .icon-bar {
    display: block;
    width: 22px;
    height: 2px;
    border-radius: 1px;
    background-color: #888;
}

.navbar-toggle .icon-bar + .icon-bar {
    margin-top: 4px;
}

.navbar-toggle.collapsed .icon-bar {
    display: block;
}

@media (min-width: 768px) {
    .navbar-toggle {
        display: none !important;
    }
}

.navbar-collapse {
    overflow-x: visible;
    padding-right: 15px;
    padding-left: 15px;
    border-top: 1px solid transparent;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.navbar-collapse.collapse {
    display: none !important;
}

.navbar-collapse.show {
    display: block !important;
}

@media (min-width: 768px) {
    .navbar-collapse {
        width: auto;
        border-top: 0;
        box-shadow: none;
    }
    
    .navbar-collapse.collapse {
        display: block !important;
        height: auto !important;
        padding-bottom: 0;
        overflow: visible !important;
    }
}

.navbar-nav {
    margin: 7.5px -15px;
    list-style: none;
    padding: 0;
}

.navbar-nav > li {
    float: left;
}

.navbar-nav > li > a {
    padding-top: 10px;
    padding-bottom: 10px;
    line-height: 20px;
    text-decoration: none;
}

@media (max-width: 767px) {
    .navbar-nav > li {
        float: none;
    }
}

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

@media (min-width: 768px) {
    .navbar-right {
        float: right;
        margin-right: -15px;
    }
}

/* ============================================
   Navigation
   ============================================ */

.nav {
    margin-bottom: 0;
    padding-left: 0;
    list-style: none;
}

.nav > li {
    position: relative;
    display: block;
}

.nav > li > a {
    position: relative;
    display: block;
    padding: 10px 15px;
    text-decoration: none;
}

.nav > li > a:hover,
.nav > li > a:focus {
    text-decoration: none;
    background-color: #eee;
}

/* Dropdown Menu */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1000;
    display: none;
    float: left;
    min-width: 160px;
    padding: 5px 0;
    margin: 2px 0 0;
    list-style: none;
    font-size: 14px;
    background-color: #fff;
    border: 1px solid #ccc;
    border: 1px solid rgba(0, 0, 0, 0.15);
    border-radius: 4px;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.175);
    background-clip: padding-box;
}

.dropdown-menu > li > a {
    display: block;
    padding: 3px 20px;
    clear: both;
    font-weight: normal;
    line-height: 1.42857143;
    color: rgb(55, 65, 81);
    white-space: nowrap;
    text-decoration: none;
}

.dropdown-menu > li > a:hover,
.dropdown-menu > li > a:focus {
    color: #262626;
    text-decoration: none;
    background-color: #f5f5f5;
}

/* ============================================
   Utilities
   ============================================ */

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

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.hidden {
    display: none !important;
}

.clearfix::before,
.clearfix::after {
    content: " ";
    display: table;
}

.clearfix::after {
    clear: both;
}