@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@300;400;500;600;700&display=swap');

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    text-decoration: none;
    border: none;
    outline: none;
    font-family: 'Be Vietnam Pro', sans-serif;
}

html {
    font-size: 62.5%;
    scroll-behavior: smooth;
}

body {
    width: 100%;
    min-height: 100vh;
    overflow-x: hidden;
    background-color: #ffffff;
    color: #333;
    line-height: 1.6;
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 2rem 9%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.logo {
    font-size: 3.5rem;
    color: #3fd7eb;
    font-weight: 800;
    transition: 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

nav {
    display: flex;
    gap: 4rem;
}

nav a {
    font-size: 1.8rem;
    color: #666;
    font-weight: 500;
    transition: 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background-color: #3fd7eb;
    transition: width 0.3s ease;
}

nav a:hover,
nav a.active {
    color: #3fd7eb;
}

nav a:hover::after,
nav a.active::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    font-size: 2.5rem;
    background: none;
    color: #3fd7eb;
    cursor: pointer;
    transition: 0.3s ease;
}

.menu-toggle:hover {
    transform: rotate(90deg);
}

/* Sections Common Styles */
.section {
    min-height: 100vh;
    padding: 10rem 9% 5rem;
    display: flex;
    align-items: center;
}
#home > .container
{
    width: 100%;
    max-width: 1500px;
    padding: 0 2rem;
}

/* Home Section */
.home {
    background-color: #ffffff;
}

.home-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.home-img {
    flex: 1;
}

.home-img img {
    width: 600px;
    height: 600px;
    overflow: hidden;
    object-fit: cover;
    border-radius: 30%;
    box-shadow: 0 0 40px rgba(63, 215, 235, 0.4);
    transition: 0.4s ease;
}

.home-img img:hover {
    transform: scale(1.02);
    box-shadow: 0 0 60px rgba(63, 215, 235, 0.6);
}

.home-text {
    flex: 1;
}

.home-text h1 {
    font-size: 5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #555;
}

.home-text h1 span {
    color: #3fd7eb;
}

.typing-text {
    font-size: 3rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: #555;
    min-height: 4rem;
}

.typing-text {
    font-size: 3rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: #555;
    min-height: 4rem;
    overflow: hidden; /* Quan trọng: ẩn phần thừa */
    white-space: nowrap; /* Không xuống dòng */
}

.typing-text span {
    color: #3fd7eb;
    position: relative;
    display: inline-block; /* Để chứa pseudo-element */
}

/* Dòng chữ thay đổi */
.typing-text span::before {
    content: "Kỹ Sư Phần Mềm";
    color: #3fd7eb;
    animation: words 20s infinite;
    display: inline-block;
}

/* Thanh nhấp nháy (blinking cursor) */
.typing-text span::after {
    content: "";
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    right: -8px;
    width: 3px;
    height: 80%; /* Cao hơn chữ một chút */
    background-color: #3fd7eb;
    animation: cursorBlink 0.8s infinite;
    /* Xóa background-color trắng cũ */
}

.home-text p {
    font-size: 1.8rem;
    margin-bottom: 3rem;
    color: #666;
    line-height: 1.8;
}

.highlight {
    color: #3fd7eb;
    font-weight: 600;
}

.contact-info {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-info p {
    font-size: 1.6rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    color: #555;
}

.contact-info i {
    color: #3fd7eb;
    font-size: 2rem;
}

/* Social Icons */
.social-icons {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
}

.social-icons a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 5rem;
    height: 5rem;
    background-color: transparent;
    border: 2px solid #3fd7eb;
    border-radius: 50%;
    font-size: 2.2rem;
    color: #3fd7eb;
    transition: 0.3s ease;
}

.social-icons a:hover {
    background-color: #3fd7eb;
    color: white;
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(63, 215, 235, 0.3);
}

/* Button */
.btn {
    display: inline-block;
    padding: 1.5rem 3.5rem;
    background-color: white;
    border: 2px solid #3fd7eb;
    border-radius: 5rem;
    font-size: 1.8rem;
    font-weight: 600;
    color: #3fd7eb;
    cursor: pointer;
    transition: 0.3s ease;
    text-align: center;
}

.btn:hover {
    background-color: #3fd7eb;
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(63, 215, 235, 0.4);
}

/* Services, Education, achievement Sections */
.services, .achievement {
    background-color: #f8f9fa;
}
.education
{
    background-color: #ffffff;
}


/* Animations */
/* Animation cho cursor nhấp nháy */
@keyframes cursorBlink {
    0%, 100% { 
        opacity: 1; 
        transform: translateY(-50%) scaleY(1);
    }
    50% { 
        opacity: 0; 
        transform: translateY(-50%) scaleY(0.8);
    }
}
@keyframes words {
    0%, 16% {
        content: "Kỹ Sư Phần Mềm";
        opacity: 1;
    }
    17%, 19% {
        content: "";
        opacity: 0; 
    }
    20%, 36% {
        content: "Nhà Sáng Tạo Nội Dung";
        opacity: 1;
    }
    37%, 39% {
        content: "";
        opacity: 0;
    }
    40%, 56% {
        content: "Thiết Kế Web";
        opacity: 1;
    }
    57%, 59% {
        content: "";
        opacity: 0;
    }
    60%, 76% {
        content: "Gia Sư Tin Học";
        opacity: 1;
    }
    77%, 79% {
        content: "";
        opacity: 0;
    }
    80%, 96% {
        content: "Biên Tập Viên";
        opacity: 1;
    }
    97%, 99% {
        content: "";
        opacity: 0;
    }
}

@media (prefers-reduced-motion: no-preference) {
    html {
        scroll-behavior: smooth;
        scroll-padding-top: 80px; /* Bù cho header fixed */
    }
}

/* Animation cho active section */
section {
    scroll-margin-top: 80px; 
}