/* Base Styles and Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Noto Sans Display', sans-serif;
    font-weight: 300;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    scroll-snap-type: y mandatory;
    overflow-y: scroll;
    height: 100%;
}

body {
    line-height: 1.6;
    color: #333;
    background-color: #1a1a1a;
    overflow-x: hidden;
    opacity: 0;
    transition: opacity 0.5s ease;
    height: 100%;
    overflow-y: auto;
}

body.loading-complete {
    opacity: 1;
}

/* Loading Progress */
.loading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: #FFD700;
    z-index: 1001;
    transition: width 0.3s ease;
}

/* Reading Progress */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: #FFD700;
    z-index: 1001;
    transition: width 0.1s;
}

/* Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: #FFD700;
    color: #1a1a1a;
    padding: 8px;
    z-index: 1001;
    transition: top 0.3s ease;
}

.skip-link:focus {
    top: 0;
}

:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.5);
    border-radius: 4px;
}

/* Enhanced Background Effects */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('./asset/bg_pic2.jpeg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: -2;
    transform: scale(1.1);
    transition: transform 0.5s ease;
    will-change: transform;
}

body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.7),
        rgba(0, 0, 0, 0.5) 50%,
        rgba(0, 0, 0, 0.7)
    );
    z-index: -1;
}

/* Layout Components */
section {
    scroll-snap-align: start;
    scroll-snap-stop: always;
    padding: 6rem 1rem;
    min-height: 100vh;
    position: relative;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: opacity, transform;
}

section.visible {
    opacity: 1;
    transform: translateY(0);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 0 2rem;
    height: 100%;
}

/* Enhanced Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    height: 70px;
    background: rgba(26, 26, 26, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

nav.scrolled {
    height: 60px;
    background: rgba(26, 26, 26, 0.95);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    padding: 0 24px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 400;
    color: white;
    text-decoration: none;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.logo:hover {
    color: #FFD700;
    text-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
}

/* Social Links */
.social-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.social-links a {
    color: white;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.social-links a:hover {
    color: #FFD700;
    transform: translateY(-2px);
}

.social-links svg {
    width: 24px;
    height: 24px;
    transition: all 0.3s ease;
}

/* Hero Section */
#home {
    display: flex;
    align-items: center;
    color: white;
    min-height: 100vh;
}

.hero-content {
    text-align: center;
    animation: heroFadeIn 1s ease;
    position: relative;
}

@keyframes heroFadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: 1.5rem;
    letter-spacing: 1px;
    font-weight: 400;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-content p {
    font-size: clamp(1.1rem, 3vw, 1.3rem);
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 0.5px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

/* About Section */
#about {
    color: white;
    display: flex;
    align-items: center;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 345px;
    gap: 4rem;
    align-items: center;
    padding: 2rem 0;
}

.section-title {
    font-size: clamp(2rem, 5vw, 2.5rem);
    margin-bottom: 1rem;
    color: white;
    font-weight: 400;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    position: relative;
    display: inline-block;
    letter-spacing: -0.02em;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 60px;
    height: 3px;
    background: #FFD700;
}

.about-description {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 3rem;
    color: rgba(255, 255, 255, 0.9);
}

/* Experience Tabs */
.experience-header {
    display: flex;
    gap: 2rem;
    margin-bottom: 0rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 0.5rem;
    overflow-x: auto;
    scrollbar-width: thin;
    scrollbar-color: #FFD700 rgba(255, 255, 255, 0.1);
}

.experience-header::-webkit-scrollbar {
    height: 4px;
}

.experience-header::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

.experience-header::-webkit-scrollbar-thumb {
    background-color: #FFD700;
    border-radius: 2px;
}

.header-item {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    transition: color 0.3s ease;
    position: relative;
    padding: 0.25rem 0;
    white-space: nowrap;
}

.header-item:hover {
    color: #FFD700;
}

.header-item::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 0;
    height: 2px;
    background: #FFD700;
    transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
}

.header-item:hover::after {
    width: 100%;
}

.header-item.active {
    color: #FFD700;
}

.header-item.active::after {
    width: 100%;
    transition: none;
}

/* Tab Content */
.tab-content {
    position: relative;
    min-height: 300px;
    overflow: visible;
    margin-top: 1.5rem;
}

.tab-content > div {
    position: absolute;
    width: 100%;
    left: 0;
    top: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateX(-100%);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.tab-content > div.active {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

/* Experience Items */
.experience-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 1rem;
    margin-bottom: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-left: 3px solid transparent;
    transform-origin: center center;
}

.experience-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px) scale(1.01);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

/* Experience Details */
.experience-details {
    flex: 1;
}

.experience-details h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: white;
    letter-spacing: -0.01em;
    font-weight: 400;
}

.experience-details h3.position {
    color: #FFD700;
}

.experience-details p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* Experience Location */
.experience-location {
    text-align: right;
    min-width: 140px;
    margin-left: 1rem;
}

.experience-location .date {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.experience-location p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.9);
}

/* Profile Picture */
.profile-picture-container {
    width: 345px;
    height: 460px;
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.profile-picture-container:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
    will-change: transform;
}

.profile-picture-container:hover .profile-image {
    transform: scale(1.05);
}

/* Portfolio Section */
#portfolio {
    color: white;
    display: flex;
    align-items: center;
}

.portfolio-container {
    width: 100%;
}

.portfolio-header {
    text-align: left;
    margin-bottom: 1rem;
}

/* Portfolio Modal Styles */
.portfolio-modal {
    display: block;
    position: relative;
    width: 100%;
    height: auto;
}

.modal-content {
    position: relative;
    margin: 0;
    width: 100%;
    height: 650px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.modal-content:hover {
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
    transform: translateY(-5px);
}

.modal-content iframe {
    width: 100%;
    height: 100%;
    border: none;
    border-radius: 12px;
    background: white;
    opacity: 0.95;
}

/* Contact Section */
#contact {
    color: white;
    display: flex;
    align-items: center;
    padding: 5rem 1rem;
}

.contact-container {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-header {
    text-align: center;
    margin-bottom: 4rem;
}

.contact-subtitle {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 1rem;
    font-weight: 300;
}

.contact-content {
    width: 100%;
}

.contact-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

/* Contact Info Styling */
.contact-info {
    width: 100%;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.contact-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 215, 0, 0.1), transparent);
    transition: left 0.5s ease;
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 215, 0, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.contact-item:hover::before {
    left: 100%;
}

.contact-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: rgba(255, 215, 0, 0.1);
    border-radius: 10px;
    color: #FFD700;
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.contact-item:hover .contact-icon {
    background: rgba(255, 215, 0, 0.2);
    transform: scale(1.1);
}

.contact-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.contact-label {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 400;
}

.contact-details a {
    color: white;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 400;
    transition: all 0.3s ease;
}

.contact-details a:hover {
    color: #FFD700;
}

/* Resume Section Styling */
.resume-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    height: fit-content;
}

.resume-title {
    color: white;
    font-size: 1.2rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    margin: 0;
}

.resume-description {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    line-height: 1.5;
    margin: 0;
}

.resume-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.resume-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    text-decoration: none;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.3px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.resume-btn.primary {
    background: linear-gradient(135deg, #FFD700, #FFC700);
    color: #1a1a1a;
    border: none;
    box-shadow: 0 4px 15px rgba(255, 215, 0, 0.3);
}

.resume-btn.primary:hover {
    background: linear-gradient(135deg, #FFC700, #FFB700);
    color: #1a1a1a;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 215, 0, 0.4);
}

.resume-btn.secondary {
    background: transparent;
    color: #FFD700;
    border: 2px solid #FFD700;
}

.resume-btn.secondary:hover {
    background: rgba(255, 215, 0, 0.1);
    color: white;
    border-color: #FFD700;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 215, 0, 0.2);
}

.resume-btn.secondary:hover svg {
    color: white;
    stroke: white;
}

.resume-btn svg {
    transition: transform 0.3s ease;
}

.resume-btn:hover svg {
    transform: translateY(2px);
}

/* Footer */
.footer {
    background: rgba(26, 26, 26, 0.8);
    backdrop-filter: blur(10px);
    padding: 2rem 0;
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
}

/* Enhanced Animations */
@keyframes contactFadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.contact-item {
    animation: contactFadeIn 0.6s ease forwards;
}

.contact-item:nth-child(1) { animation-delay: 0.1s; }
.contact-item:nth-child(2) { animation-delay: 0.2s; }
.contact-item:nth-child(3) { animation-delay: 0.3s; }
.contact-item:nth-child(4) { animation-delay: 0.4s; }

.resume-section {
    animation: contactFadeIn 0.6s ease 0.5s forwards;
    opacity: 0;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .modal-content {
        height: 450px;
        margin-top: 1rem;
    }
    
    .profile-picture {
        display: none;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .container {
        padding: 0 1rem;
    }

    .contact-main {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .resume-section {
        order: -1;
    }
}

@media (max-width: 768px) {
    .modal-content {
        height: 400px;
        border-radius: 8px;
    }

    .social-links {
        gap: 1rem;
    }
    
    .social-links svg {
        width: 20px;
        height: 20px;
    }

    .experience-item {
        flex-direction: column;
        gap: 1rem;
    }

    .experience-location {
        text-align: left;
        margin-left: 0;
        min-width: auto;
    }

    #contact {
        padding: 3rem 1rem;
    }
    
    .contact-header {
        margin-bottom: 3rem;
    }
    
    .contact-main {
        gap: 2rem;
    }

    .contact-item {
        padding: 0.875rem;
    }
    
    .contact-icon {
        width: 40px;
        height: 40px;
    }
    
    .resume-section {
        padding: 1.5rem;
    }
    
    .resume-buttons {
        gap: 0.75rem;
    }
    
    .resume-btn {
        padding: 0.875rem 1.25rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .modal-content {
        height: 400px;
        border-radius: 6px;
        margin-top: 0.5rem;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1.1rem;
    }

    .profile-picture-container {
        width: 100%;
        height: auto;
        aspect-ratio: 3/4;
    }

    #contact {
        padding: 2rem 1rem;
    }
    
    .contact-header {
        margin-bottom: 2rem;
    }
    
    .contact-subtitle {
        font-size: 1rem;
    }
    
    .contact-main {
        gap: 1.5rem;
    }
    
    .contact-item {
        padding: 0.75rem;
        gap: 0.75rem;
    }
    
    .contact-icon {
        width: 36px;
        height: 36px;
    }
    
    .contact-details a {
        font-size: 0.9rem;
    }
    
    .resume-section {
        padding: 1.25rem;
    }
    
    .resume-title {
        font-size: 1.1rem;
    }
    
    .resume-description {
        font-size: 0.9rem;
    }
    
    .resume-btn {
        padding: 0.75rem 1rem;
        font-size: 0.85rem;
        gap: 0.5rem;
    }
    
    .resume-btn svg {
        width: 16px;
        height: 16px;
    }

}

/* Focus States for Accessibility */
.contact-item:focus-within {
    outline: 2px solid #FFD700;
    outline-offset: 2px;
}

.resume-btn:focus {
    outline: 2px solid #FFD700;
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .contact-item {
        border: 2px solid white;
        background: black;
    }
    
    .contact-icon {
        background: #FFD700;
        color: black;
    }
    
    .resume-section {
        border: 2px solid white;
        background: black;
    }
    
    .modal-content {
        border: 2px solid white;
        background: black;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .contact-item,
    .resume-section {
        animation: none;
        opacity: 1;
    }
    
    .contact-item::before {
        display: none;
    }
    
    .contact-item:hover,
    .resume-btn:hover {
        transform: none;
    }

    .modal-content {
        transition: none;
        transform: none;
    }

    .modal-content:hover {
        transform: none;
    }
}

/* Print Styles */
@media print {
    nav, 
    .portfolio-modal {
        display: none;
    }
    
    body {
        background: none;
        color: #000;
    }
    
    body::before, 
    body::after {
        display: none;
    }
    
    .experience-item, 
    .contact-content {
        break-inside: avoid;
        page-break-inside: avoid;
    }

    a {
        text-decoration: none;
        color: #000;
    }

    .section-title::after {
        background: #000;
    }

    #portfolio::after {
        content: "Portfolio available online at: [your-website-url]";
        display: block;
        margin-top: 2rem;
        font-style: italic;
        color: #666;
    }
}