:root {
  --white-color: #F9F9F6;
  --second-white-color: #F3F1EC;      
  --primary-color: #785656;       
  --black-color: #3D2626;
  --gray-color: #D9D9D9;        
  --bg-creamy-color: #DED9CF;   
  --error-color: #CB241C;
  --header-h: 64px;
  --footer-h: 80px;
  --gap: 20px;
  --font-size-base: 16px;
  --font-roboto: 'Roboto', Arial, sans-serif;
  --font-be-vn: 'BeVietnamPro', sans-serif;
}

main {
  position: relative;
}


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

img {
  width: 100%;
  height: 100%;
}

html {
  scroll-behavior: smooth;
}

button {
  font-family: var(--font-be-vn);
  cursor: pointer;
  border: transparent;
  background-color: transparent;
}

input,
textarea,
select {
  border: 1px solid var(--deactive-color);
}

select{
  border:none;
  width: 100%;
}

select:focus,
select:focus-visible,
input:focus,
input:focus-visible,
textarea:focus,
textarea:focus-visible {
  outline: none;
}

body {
  display: flex;
  flex-direction: column;
  background-color: var(--white-color);
  font-family: var(--font-be-vn);
  overflow-x: hidden;
  position: relative;
}

header,
footer,
section {
  display: flex; 
  justify-content: center;
}

header {
  z-index: 2;
  position: sticky;
  top: 0px;
  left: 0px;
  background-color: var(--white-color);
  box-shadow: 1px 1px 10px 3px rgba(0, 0, 0, 0.15);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  padding: 0px;
  margin: 0px;
  font-weight: bold;
  color: var(--black-color);
  text-transform: uppercase;
}

a {
  text-decoration: none;
  color: var(--black-color);
  cursor: pointer;
}

p {
  line-height: 1.5;
  color: var(--black-color);
  font-size: calc(var(--font-size-base) - 2px);
}

input,
textarea{
    caret-color: var(--black-color);
}

li{
  color: var(--black-color);
}

section.hidden-section {
    opacity: 1;
    transform: none;
    filter: none;
}

section.hidden-section>div>div {
    opacity: 0;
    filter: blur(6px);
    transition: opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1),
        transform 1.2s cubic-bezier(0.16, 1, 0.3, 1),
        filter 1.2s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform, filter;
}

section.hidden-section>div>div:nth-child(1) {
    transform: translateY(-40px) scale(0.95);
}

section.hidden-section>div>div:nth-child(2) {
    transform: translateY(60px);
    transition-delay: 0.15s;
}

section.hidden-section>div>div:nth-child(n+3) {
    transform: translateX(-50px);
    transition-delay: 0.3s;
}

section.hidden-section.show-up>div>div {
    opacity: 1;
    transform: translate(0) scale(1);
    filter: blur(0);
}


footer.hidden-section {
    opacity: 0;
    transform: translateY(100px) rotateX(-20deg);
    transform-origin: top center;
    filter: blur(20px);
    transition: opacity 1.5s cubic-bezier(0.22, 1, 0.36, 1),
        transform 1.5s cubic-bezier(0.22, 1, 0.36, 1),
        filter 1.5s cubic-bezier(0.22, 1, 0.36, 1);
    will-change: transform, opacity, filter;
}

footer.hidden-section.show-up {
    opacity: 1;
    transform: translateY(0) rotateX(0);
    filter: blur(0);
}

/* Chặn bôi đen toàn bộ website */
*, *::before, *::after {
  -webkit-user-select: none !important; /* Safari, Chrome */
  -moz-user-select: none !important;    /* Firefox */
  -ms-user-select: none !important;     /* IE/Edge */
  user-select: none !important;         /* Chuẩn CSS3 */
}