* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Manrope", sans-serif;
    scroll-behavior: smooth;
}

body {
    background: #fafafa;
    overflow-x: hidden;
    color: #1e293b;
    line-height: 1.6;
}

/* Header */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(241, 245, 249, 0.9));
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    z-index: 1000;
    transition: all 0.4s ease;
}

header.hidden {
    opacity: 0.9;
    transform: translateY(-10px) scale(0.98);
    background: linear-gradient(90deg, #1e40af, #3b82f6);
    background-size: 200% 100%;
    animation: gradient 3s ease infinite;
    border-radius: 16px;
    margin: 10px;
}

header.hidden .logo,
header.hidden .nav-link,
header.hidden .hamburger {
    color: #ffffff;
}

header.hidden .nav-link:hover {
    color: #bfdbfe;
}

header.hidden .nav-link::after {
    background: linear-gradient(90deg, #bfdbfe, #60a5fa);
}


nav {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.9rem;
    font-weight: 700;
    color: #1e293b;
    transition: color 0.3s ease;
}

.logo:hover {
    color: #1e40af;
}

.nav-links {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: #475569;
    font-size: 1rem;
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease, transform 0.3s ease;
}

.nav-link i {
    font-size: 1.3rem;
}

.nav-link:hover {
    color: #1e40af;
    transform: translateY(-2px);
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: linear-gradient(90deg, #1e40af, #3b82f6);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    font-size: 1.6rem;
    cursor: pointer;
    color: #1e293b;
}

/* Sections */
section {
    min-height: 100vh;
    padding: 120px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
    will-change: transform, opacity;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.Home {
    background: linear-gradient(135deg, #e0e7ff, #c7d2fe);
    position: relative;
    overflow: hidden;
}

.home-contents {
    text-align: center;
    max-width: 900px;
    z-index: 1;
}

.home-contents h1 {
    font-size: 3.8rem;
    font-weight: 800;
    color: #1e293b;
    margin-bottom: 20px;
    overflow: hidden;
    white-space: nowrap;
    border-right: 4px solid #1e40af;
    animation: typing 2.5s steps(30, end) forwards, blink-cursor 0.75s step-end infinite;
}

.home-contents p {
    font-size: 1.3rem;
    font-style: italic;
    color: #475569;
    margin-bottom: 30px;
    line-height: 1.8;
}

.home-contents .cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.home-contents a {
    display: inline-block;
    padding: 14px 35px;
    background: linear-gradient(90deg, #1e40af, #3b82f6);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 6px 20px rgba(30, 64, 175, 0.3);
}

.home-contents a::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.5s ease, height 0.5s ease;
}

.home-contents a:hover::before {
    width: 250px;
    height: 250px;
}

.home-contents a:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 25px rgba(30, 64, 175, 0.4);
}

#particles-js {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

/* About */
.about-contents {
    max-width: 1100px;
    text-align: center;
}

.about-contents h3 {
    font-size: 3.2rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 50px;
}

.about-inner {
    display: flex;
    gap: 50px;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
}

.avatar-me {
    width: 240px;
    height: 240px;
    background: url('../img/anh2.jpg') center/cover;
    border-radius: 50%;
    box-shadow: 0 8px 25px rgb(33 150 243 / 54%);
    animation: float 3s ease-in-out infinite;
    transition: transform 0.3s ease;
}

.avatar-me:hover {
    transform: scale(1.05);
}

.about-me {
    max-width: 650px;
    text-align: left;
}

.about-me p {
    color: #475569;
    line-height: 1.8;
    margin-bottom: 25px;
    font-size: 1.1rem;
    font-style: italic;
}

.about-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 25px;
    margin-top: 25px;
}

.info-card {
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    padding: 25px;
    border-radius: 12px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.info-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* Skills */
.Skills {
    background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
}

.skills-contents {
    max-width: 1100px;
    text-align: center;
}

.skills-contents h3 {
    font-size: 3.2rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 50px;
}

.skills-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    justify-items: center;
    align-items: start;
}

.skill-list {
    list-style: none;
    padding: 0;
    max-width: 500px;
    width: 100%;
}

.skill-item {
    margin-bottom: 25px;
    position: relative;
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px) scale(0.95);
    transition: opacity 0.6s ease, transform 0.6s ease;
    display: flex;
    align-items: center;
    gap: 12px;
}

.skill-item.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.skill-item i {
    font-size: 1.8rem;
    color: #1e40af;
    transition: transform 0.3s ease;
}

.skill-item:hover i {
    transform: scale(1.2);
}

.skill-item span {
    display: block;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 12px;
    font-size: 1.3rem;
}

.power-bar {
    background: #e2e8f0;
    height: 16px;
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    flex: 1;
}

.power-fill {
    background: linear-gradient(90deg, #1e40af, #3b82f6);
    height: 100%;
    width: 0;
    transition: width 2s ease-out;
    box-shadow: 0 0 12px rgba(30, 64, 175, 0.5);
}

.skill-item:hover {
    transform: scale(1.02);
}

.skill-item:hover .power-fill {
    box-shadow: 0 0 18px rgba(30, 64, 175, 0.7);
}

.skill-tooltip {
    position: absolute;
    top: -45px;
    left: 50%;
    transform: translateX(-50%) translateY(0);
    background: #1e3a8a;
    color: white;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 0.85rem;
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
    white-space: nowrap;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    z-index: 10;
}

.skill-item:hover .skill-tooltip {
    opacity: 1;
    transform: translateX(-50%) translateY(-5px);
}

.radar-chart {
    max-width: 320px;
    width: 100%;
    background: #fff;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.6s ease, transform 0.6s ease;
    margin: 0 auto;
    position: relative;
}

.radar-chart.visible {
    opacity: 1;
    transform: scale(1);
    animation: pulse 2s ease-out;
}

/* education */
.education {
    background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
}

.education-contents {
    max-width: 1100px;
    text-align: center;
}

.education-contents h3 {
    font-size: 3.2rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 50px;
}

.timeline {
    position: relative;
    margin: 0 auto;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 6px;
    background: #1e40af;
    left: 50%;
    transform: translateX(-50%);
}

.timeline-item {
    margin: 25px 0;
    position: relative;
    width: 65%;
    padding: 25px;
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    border-radius: 12px;
    opacity: 0;
    transform: translateY(30px) scale(0.95);
    transition: opacity 0.6s ease, transform 0.6s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.timeline-item.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.timeline-item.left {
    right: 25%;
    margin-right: 12%;
}

.timeline-item.right {
    left: 50%;
    margin-left: 12%;
}

.timeline-item h4 {
    font-size: 1.4rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 12px;
}

.timeline-item p {
    color: #475569;
    line-height: 1.6;
    font-style: italic;
}

/* hobbies */

.Hobbies {

    background: linear-gradient(135deg, #e0e7ff, #c7d2fe);
}

.hobbies-contents {
    max-width: 1100px;
    text-align: center;
}

.hobbies-contents h3 {
    font-size: 3.2rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 50px;
}

.hobbies-list {
    display: grid;
    gap: 25px;
}

.hobbies-item {
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    padding: 25px;
    border-radius: 12px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.hobbies-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.hobbies-item h4 {
    font-size: 1.4rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 10px;
}

.hobbies-item p {
    color: #475569;
    line-height: 1.6;
    font-style: italic;
}

/* Work */
.Work {
    background: linear-gradient(135deg, #f1f5f9, #e2e8f0);

}

.work-content {
    text-align: center;
    max-width: 1100px;
}

.work-content h3 {
    font-size: 3.2rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 50px;
}

.canvas {
    width: 250px;
    height: 200px;
    perspective: 800px;
    position: relative;
    margin: 100px auto;
    transition: transform 0.5s ease;
}

.wheel-work-3d-wrapper {
    position: absolute;
    inset: 0;
    transform-style: preserve-3d;
    transform: rotateX(-25deg) rotateZ(-10deg);
}

.wheel {
    position: absolute;
    inset: 0;
    transform-style: preserve-3d;
    animation: wheel-3d 6s linear infinite;
}

.wheel:hover {
    animation-play-state: paused;
}

.face {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    cursor: pointer;
    border-radius: 10px;
    transition: box-shadow 0.3s ease, transform 0.3s ease;
    image-rendering: optimizeQuality;
}

.face:hover {
    box-shadow: 0 0 20px rgba(30, 64, 175, 0.6);
    transform: scale(1.05);
}

.face:nth-child(1) {
    background-image: url('../img/mg-1.jpg');
    transform: rotateY(0deg) translateZ(230px);
}

.face:nth-child(2) {
    background-image: url('../img/mg-2.jpg');
    transform: rotateY(60deg) translateZ(230px);
}

.face:nth-child(3) {
    background-image: url('../img/mg-3.jpg');
    transform: rotateY(120deg) translateZ(230px);
}

.face:nth-child(4) {
    background-image: url('../img/mg-4.jpg');
    transform: rotateY(180deg) translateZ(230px);
}

.face:nth-child(5) {
    background-image: url('../img/mg-5.jpg');
    transform: rotateY(240deg) translateZ(230px);
}

.face:nth-child(6) {
    background-image: url('../img/mg-6.jpg');
    transform: rotateY(300deg) translateZ(230px);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: #fff;
    max-width: 700px;
    padding: 30px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
    position: relative;
    transform: scale(0.7);
    opacity: 0;
    transition: transform 0.4s ease, opacity 0.4s ease;
}

.modal-content.show {
    transform: scale(1);
    opacity: 1;
}

.modal-content img {
    width: 100%;
    max-height: 200px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 20px;
    image-rendering: optimizeQuality;
}

.modal-content h4 {
    font-size: 1.8rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 15px;
}

.modal-content p {
    color: #475569;
    line-height: 1.6;
    margin-bottom: 20px;
    font-style: italic;
}

.modal-content .detail-btn {
    display: inline-block;
    padding: 10px 25px;
    background: linear-gradient(90deg, #1e40af, #3b82f6);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.modal-content .detail-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(30, 64, 175, 0.3);
}

.modal-content .close {
    position: absolute;
    top: 15px;
    right: 25px;
    font-size: 1.8rem;
    cursor: pointer;
    color: #475569;
    transition: color 0.3s ease;
}

.modal-content .close:hover {
    color: #1e40af;
}



/* Contact */
.Contact {
    background: linear-gradient(135deg, #e0e7ff, #c7d2fe);
}

.contact-contents {
    max-width: 900px;
    text-align: center;
    z-index: 1;
}

.contact-contents h3 {
    font-size: 3.2rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 25px;
}

.contact-contents h5 {
    font-size: 1.3rem;
    color: #475569;
    margin-bottom: 35px;
    font-weight: 400;
    line-height: 1.8;
    font-style: italic;
}

.contact-form {
    max-width: 650px;
    margin: 0 auto;
}

.form-row {
    display: flex;
    gap: 25px;
    margin-bottom: 20px;
}

.form-group {
    position: relative;
    flex: 1;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    background: #fff;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.contact-form label {
    position: absolute;
    top: 14px;
    left: 14px;
    color: #6b7280;
    font-size: 1rem;
    transition: all 0.3s ease;
    pointer-events: none;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: #1e40af;
    box-shadow: 0 0 14px rgba(30, 64, 175, 0.3);
    outline: none;
}

.contact-form input:focus+label,
.contact-form input:not(:placeholder-shown)+label,
.contact-form textarea:focus+label,
.contact-form textarea:not(:placeholder-shown)+label {
    top: -12px;
    left: 12px;
    font-size: 0.85rem;
    color: #1e40af;
    background: #fff;
    padding: 0 6px;
}

.contact-form button {
    background: linear-gradient(90deg, #1e40af, #3b82f6);
    color: white;
    border: none;
    padding: 14px 35px;
    border-radius: 8px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 6px 20px rgba(30, 64, 175, 0.3);
}

.contact-form button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.5s ease, height 0.5s ease;
}

.contact-form button:hover::before {
    width: 250px;
    height: 250px;
}

.contact-form button:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 25px rgba(30, 64, 175, 0.4);
}

.contact-form button.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 3px solid #fff;
    border-top: 3px solid transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* Footer */
footer {
    text-align: center;
    padding: 30px;
    background: linear-gradient(135deg, #1e293b, #334155);
    color: white;
}

.social-links {
    margin-top: 15px;
    display: flex;
    justify-content: center;
    gap: 25px;
}

.social-links a {
    color: white;
    font-size: 1.6rem;
    transition: transform 0.3s ease, color 0.3s ease;
}

.social-links a:hover {
    transform: scale(1.2);
    color: #3b82f6;
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: linear-gradient(90deg, #1e40af, #3b82f6);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    z-index: 1000;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        align-items: center;
        padding: 25px 0;
        transform: translateY(-100%);
        transition: transform 0.3s ease;
    }

    .nav-links.active {
        transform: translateY(0);
    }

    .hamburger {
        display: block;
    }

    .home-contents h1 {
        font-size: 2.8rem;
    }

    .home-contents p {
        font-size: 1.1rem;
    }

    .about-inner {
        flex-direction: column;
        text-align: center;
    }

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

    .avatar-me {
        width: 180px;
        height: 180px;
    }

    .skills-inner {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .skill-list {
        max-width: 100%;
        padding: 0 20px;
    }

    .skill-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .radar-chart {
        max-width: 260px;
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        width: 100%;
        margin: 25px 10%;
        left: 0 !important;
    }

    .form-row {
        flex-direction: column;
    }

    .canvas {
        width: 180px;
        height: 144px;
    }

    .face:nth-child(n) {
        transform: rotateY(calc(var(--i) * 60deg)) translateZ(180px);
    }

    section {
        padding: 80px 20px;
    }

    .back-to-top {
        width: 45px;
        height: 45px;
        bottom: 20px;
        right: 20px;
    }
}

/* Animations */
@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

@keyframes float {
    0% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-15px);
    }

    100% {
        transform: translateY(0);
    }
}

@keyframes wheel-3d {
    0% {
        rotate: y 0deg;
    }

    100% {
        rotate: y -360deg;
    }
}

@keyframes typing {
    from {
        width: 0;
    }

    to {
        width: 100%;
    }
}

@keyframes blink-cursor {

    0%,
    100% {
        border-color: transparent;
    }

    50% {
        border-color: #1e40af;
    }
}

@keyframes gradient {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

@keyframes blink {
    0% {
        opacity: 0;
    }

    5% {
        opacity: 0.4;
    }

    10% {
        opacity: 0;
    }

    15% {
        opacity: 0.55;
    }

    20% {
        opacity: 0.55;
    }

    25% {
        opacity: 0;
    }

    30% {
        opacity: 0.7;
    }

    40% {
        opacity: 0.7;
    }

    45% {
        opacity: 0;
    }

    50% {
        opacity: 0.85;
    }

    65% {
        opacity: 0.85;
    }

    70% {
        opacity: 0;
    }

    75% {
        opacity: 1;
    }

    100% {
        opacity: 1;
    }
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(30, 64, 175, 0.4);
    }

    70% {
        box-shadow: 0 0 0 20px rgba(30, 64, 175, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(30, 64, 175, 0);
    }
}

.blink-active {
    animation: blink 0.6s linear forwards;
}

.blink-text:not(.blink-active),
section h3:not(.blink-active) {
    animation: none;
    opacity: 1;
}

@media (prefers-reduced-motion: reduce) {

    .blink-active,
    .wheel,
    .power-fill,
    .home-contents h1,
    .avatar-me,
    .timeline-item,
    .skill-item,
    .radar-chart,
    .modal-content {
        animation: none;
        transition: none;
    }

    .power-fill,
    .timeline-item,
    .skill-item,
    .radar-chart,
    .modal-content {
        width: auto !important;
        opacity: 1 !important;
        transform: none !important;
    }
}