/* ===== CSS Variables (Design Tokens) ===== */
:root {
    --bg-main: #0f0518;
    --bg-secondary: #1a0b2e;
    --text-primary: #e2e8f0;
    /* Light Gray */
    --text-secondary: #94a3b8;
    /* Medium Gray */
    --accent-primary: #ffffff;
    /* White Accent */
    --accent-secondary: #cbd5e1;
    /* Silver Accent */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --transition: all 0.3s ease;

    /* Font Families */
    --font-sans: 'Inter', sans-serif;
    --font-thai: 'Prompt', sans-serif;
}

[data-theme="light"] {
    --bg-main: #f8f9fa;
    --bg-secondary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #495057;
    --accent-primary: #0077b6;
    /* Blue */
    --accent-secondary: #7b2cbf;
    /* Purple */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.05);
}

/* ===== Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-thai);
    background-image: linear-gradient(180deg, rgba(10, 3, 17, 0.98) 0%, rgba(21, 8, 38, 0.97) 25%, rgba(43, 15, 78, 0.95) 60%, rgba(82, 25, 138, 0.92) 100%), url('plexus_bg.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-sans);
    font-weight: 700;
    color: var(--text-primary);
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.35);
    animation: whiteGlow 3s infinite ease-in-out;
}

@keyframes whiteGlow {

    0%,
    100% {
        text-shadow: 0 0 5px rgba(255, 255, 255, 0.3), 0 0 10px rgba(255, 255, 255, 0.1);
    }

    50% {
        text-shadow: 0 0 15px rgba(255, 255, 255, 0.8), 0 0 25px rgba(255, 255, 255, 0.4);
    }
}

a {
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 100px 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 60px;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    position: absolute;
    width: 50%;
    height: 3px;
    bottom: -10px;
    left: 25%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 2px;
}

.highlight {
    color: var(--accent-primary);
    font-family: var(--font-sans);
    font-weight: 300;
}

/* ===== Glassmorphism Utility ===== */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: var(--glass-shadow);
    padding: 30px;
    transition: var(--transition);
}

.glass-panel:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 240, 255, 0.3);
    box-shadow: 0 10px 40px rgba(0, 240, 255, 0.1);
}

/* ===== Navigation ===== */
#navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
    padding: 20px 0;
}

#navbar.scrolled {
    background: rgba(15, 5, 24, 0.85);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    border-bottom: 1px solid var(--glass-border);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.logo {
    font-family: var(--font-sans);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    font-size: 1rem;
    font-weight: 400;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: var(--accent-primary);
    transition: var(--transition);
}

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

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent-primary);
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 20px;
}

.lang-toggle-switch {
    display: flex;
    align-items: center;
    position: relative;
    width: 60px;
    height: 30px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    cursor: pointer;
    user-select: none;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    overflow: hidden;
}

.lang-label {
    flex: 1;
    text-align: center;
    z-index: 2;
    color: var(--text-primary);
    transition: var(--transition);
}

.lang-slider {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 26px;
    height: 24px;
    background: var(--accent-primary);
    border-radius: 12px;
    z-index: 1;
    transition: transform 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
}

/* When English is selected, slide right */
.lang-toggle-switch.is-en .lang-slider {
    transform: translateX(28px);
}

/* Adjust colors for light theme */
[data-theme="light"] .lang-toggle-switch {
    background: rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .lang-slider {
    background: var(--accent-primary);
}

.theme-toggle {
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text-primary);
    transition: var(--transition);
}

.theme-toggle:hover {
    color: var(--accent-primary);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    cursor: pointer;
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
    transform-origin: center;
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
    background-color: var(--accent-primary);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
    background-color: var(--accent-primary);
}

/* ===== Hero Cover Section ===== */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    text-align: center;
    background: transparent;
}

.hero-content {
    z-index: 5;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.profile-image-container {
    position: relative;
    width: 200px;
    height: 200px;
    margin-bottom: 30px;
}

.profile-img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    position: relative;
    z-index: 2;
    border: 3px solid transparent;
    background-clip: padding-box;
}

.glow-ring {
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
    background: linear-gradient(45deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 50%;
    z-index: 1;
    animation: rotate 4s linear infinite;
}

@keyframes rotate {
    0% {
        transform: rotate(0deg);
    }

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

.name {
    font-size: 3.5rem;
    margin-bottom: 10px;
    background: linear-gradient(to right, #ffffff, #b4b4b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.45));
    animation: whiteDropGlow 3s infinite ease-in-out;
}

@keyframes whiteDropGlow {

    0%,
    100% {
        filter: drop-shadow(0 0 4px rgba(255, 255, 255, 0.3));
    }

    50% {
        filter: drop-shadow(0 0 16px rgba(255, 255, 255, 0.8));
    }
}

[data-theme="light"] .name {
    background: linear-gradient(to right, #111, #555);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: none;
    animation: none;
}

.roles {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    font-family: var(--font-sans);
    font-weight: 300;
}

.role-text {
    color: var(--accent-primary);
}

.divider {
    margin: 0 15px;
    color: var(--glass-border);
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.btn {
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
}

.primary-btn {
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    color: #fff;
    border: none;
    box-shadow: 0 4px 15px rgba(0, 240, 255, 0.3);
}

.primary-btn:hover {
    box-shadow: 0 6px 20px rgba(0, 240, 255, 0.5);
    transform: translateY(-2px);
}

.secondary-btn {
    background: transparent;
    border: 1px solid var(--accent-primary);
    color: var(--accent-primary);
}

.secondary-btn:hover {
    background: rgba(0, 240, 255, 0.1);
    transform: translateY(-2px);
}

.scroll-down {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.5rem;
    color: var(--text-secondary);
    animation: bounce 2s infinite;
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateY(0) translateX(-50%);
    }

    40% {
        transform: translateY(-20px) translateX(-50%);
    }

    60% {
        transform: translateY(-10px) translateX(-50%);
    }
}

/* Background Blobs */
.background-elements {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

#plexus-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: -1;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    z-index: 0;
}

.blob-1 {
    top: -10%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: var(--accent-secondary);
}

.blob-2 {
    bottom: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: var(--accent-primary);
}

/* ===== About Section ===== */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.icon-wrapper {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(0, 240, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--accent-primary);
    margin-bottom: 20px;
}

.about-card h3 {
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.about-img {
    width: 100%;
    height: 250px;
    border-radius: 12px;
    object-fit: cover;
    margin-bottom: 20px;
    border: 2px solid var(--accent-primary);
    display: block;
}

.about-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===== Education Section ===== */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 50px auto 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--glass-border);
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: 40px;
}

.timeline-dot {
    position: absolute;
    left: 11px;
    top: 20px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-primary);
    box-shadow: 0 0 10px var(--accent-primary);
}

.timeline-date {
    display: inline-block;
    padding: 5px 15px;
    background: rgba(123, 44, 191, 0.2);
    color: var(--accent-secondary);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.school-name {
    font-size: 1.4rem;
    margin-bottom: 5px;
}

.major {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 10px;
    font-weight: 400;
}

.gpa {
    color: var(--accent-primary);
    margin-bottom: 15px;
}

.edu-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===== Skills Section ===== */
.simple-skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.simple-skill-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px 20px;
    text-align: center;
    transition: var(--transition);
}

.simple-skill-item:hover {
    transform: translateY(-10px);
}

.skill-icon {
    font-size: 3rem;
    color: var(--accent-primary);
    margin-bottom: 15px;
    transition: var(--transition);
}

.simple-skill-item:hover .skill-icon {
    transform: scale(1.1);
    color: var(--accent-secondary);
}

.skill-text {
    font-family: var(--font-thai);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* ===== Projects Section ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.project-card {
    padding: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.project-img-wrapper {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.project-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 5, 24, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.view-btn {
    padding: 10px 20px;
    background: var(--accent-primary);
    color: #000;
    border-radius: 20px;
    font-weight: 600;
    transform: translateY(20px);
    transition: var(--transition);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-card:hover .project-img-wrapper img {
    transform: scale(1.1);
}

.project-card:hover .view-btn {
    transform: translateY(0);
}

.project-info {
    padding: 25px;
    flex-grow: 1;
}

.project-tag {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tag-web {
    background: rgba(0, 240, 255, 0.1);
    color: var(--accent-primary);
}

.tag-net {
    background: rgba(123, 44, 191, 0.1);
    color: var(--accent-secondary);
}

.tag-3d {
    background: rgba(255, 165, 0, 0.1);
    color: orange;
}

.project-info h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.project-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== Contact Section ===== */
.contact-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--accent-primary);
    transition: var(--transition);
}

.contact-item:hover .contact-icon {
    background: var(--accent-primary);
    color: #000;
    transform: scale(1.1);
}

.contact-details h4 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.contact-details a {
    font-size: 1.05rem;
    font-weight: 500;
}

.contact-details a:hover {
    color: var(--accent-primary);
}

/* ===== Footer ===== */
footer {
    text-align: center;
    padding: 30px 0;
    border-top: 1px solid var(--glass-border);
    margin-top: 50px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== Animations & Utilities ===== */
.section-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.section-reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(15, 5, 24, 0.95);
        backdrop-filter: blur(10px);
        flex-direction: column;
        align-items: center;
        padding: 30px 0;
        gap: 20px;
        transform: translateY(-150%);
        opacity: 0;
        transition: var(--transition);
        border-bottom: 1px solid var(--glass-border);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
    }

    .name {
        font-size: 2.5rem;
    }

    .roles {
        font-size: 1.2rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
    }

    .section-title {
        font-size: 2rem;
    }
}

[data-theme="light"] #navbar.scrolled {
    background: rgba(248, 249, 250, 0.85);
}

[data-theme="light"] .project-overlay {
    background: rgba(248, 249, 250, 0.8);
}

[data-theme="light"] .contact-icon {
    background: rgba(0, 0, 0, 0.05);
}

@media (max-width: 768px) {
    [data-theme="light"] .nav-links {
        background: rgba(248, 249, 250, 0.95);
    }
}

[data-theme="light"] h1,
[data-theme="light"] h2,
[data-theme="light"] h3,
[data-theme="light"] h4,
[data-theme="light"] h5,
[data-theme="light"] h6,
[data-theme="light"] .highlight {
    text-shadow: none !important;
    animation: none !important;
}

/* ===== Intro Splash Screen ===== */
#intro-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: #000;
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 1s cubic-bezier(0.4, 0, 0.2, 1), visibility 1s;
    overflow: hidden;
}

#intro-overlay.fade-out {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

#intro-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
}

.intro-content {
    position: relative;
    z-index: 10;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
}

.intro-title {
    font-family: var(--font-sans);
    font-size: 4rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 2px;
    text-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
    animation: pulseGlow 2s infinite ease-in-out;
}

#skip-intro-btn {
    padding: 10px 25px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: #fff;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

#skip-intro-btn:hover {
    background: var(--accent-primary);
    color: #000;
    border-color: var(--accent-primary);
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
    transform: translateY(-2px);
}

body.intro-active {
    overflow: hidden;
}

@keyframes pulseGlow {

    0%,
    100% {
        transform: scale(1);
        text-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
    }

    50% {
        transform: scale(1.05);
        text-shadow: 0 0 35px rgba(0, 240, 255, 0.9), 0 0 50px rgba(123, 44, 191, 0.6);
    }
}