/* 
 * CRITICAL CSS - Chỉ chứa các style cần thiết cho màn hình đầu tiên (Above-the-fold)
 * Mục đích: Giảm thời gian chặn hiển thị (Render-Blocking Time)
 */

:root {
    --color-primary: #E9C46A;
    --color-menu: #ff7b00;
    --color-secondary: #2A9D8F;
    --color-accent: #e56500;
    --color-background: #FFF9F1;
    --color-text: #3A3A3A;
    --color-dark: #3A3A3A;
    --color-white: #FFFFFF;
    --color-text-cam: #e56500;

    --font-heading: 'Lexend', sans-serif;
    --font-body: 'Nunito Sans', sans-serif;
    --bs-primary: var(--color-primary);
    --bs-secondary: var(--color-secondary);
    --bs-body-color: var(--color-text);
    --bs-body-font-family: var(--font-body);
    --bs-body-bg: var(--color-background);
}

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-background);
    font-size: 0.95rem;
}

h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-text);
}

/* Layout cơ bản */
.container, .container-fluid {
    width: 100%;
    padding-right: var(--bs-gutter-x, .75rem);
    padding-left: var(--bs-gutter-x, .75rem);
    margin-right: auto;
    margin-left: auto;
}

/* Header */
.header-main {
    background-color: #ffffff;
    z-index: 1030;
}
.header-top {
    border-bottom: 1px solid #f0f0f0;
}
.header-nav {
    min-height: 55px;
    background-color: rgba(255, 255, 255, 0.95);
}
.header-nav .nav-link {
    font-family: var(--font-heading);
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.95rem;
    position: relative;
    padding-top: 0.8rem;
    padding-bottom: 0.8rem;
}

/* Nút bấm cơ bản */
.btn {
    display: inline-block;
    font-weight: 400;
    line-height: 1.5;
    color: #212529;
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
    background-color: transparent;
    border: 1px solid transparent;
    padding: .375rem .75rem;
    font-size: 1rem;
    border-radius: .25rem;
}

.btn-primary {
    color: #000;
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

/* Navbar Toggler */
.navbar-toggler {
    padding: .25rem .75rem;
    font-size: 1.25rem;
    line-height: 1;
    background-color: transparent;
    border: 1px solid transparent;
    border-radius: .25rem;
    transition: box-shadow .15s ease-in-out;
}
.navbar-toggler-icon {
    display: inline-block;
    width: 1.5em;
    height: 1.5em;
    vertical-align: middle;
    background-repeat: no-repeat;
    background-position: center;
    background-size: 100%;
}