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

:root {
    --bg-color: #050507;
    --card-bg: #0c0c10;
    --text-primary: #f5f5f7;
    --text-secondary: #86868b;
    --text-tertiary: #424245;
    --primary: #00d1ff; /* Cyan */
    --accent: #ff3b3b; /* Red */
    --primary-rgb: 0, 209, 255;
    --accent-rgb: 255, 59, 59;
    --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-slow: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

body {
    overflow-x: hidden;
    min-height: 100vh;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-color);
}
::-webkit-scrollbar-thumb {
    background: var(--card-bg);
    border: 2px solid var(--bg-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 500;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-weight: 300;
}

/* Background Gradients & Glows */
.bg-glow {
    position: fixed;
    width: 60vw;
    height: 60vw;
    top: -30vw;
    right: -30vw;
    background: radial-gradient(circle, rgba(var(--primary-rgb), 0.08) 0%, rgba(0,0,0,0) 70%);
    z-index: -1;
    pointer-events: none;
}

.bg-glow-accent {
    position: fixed;
    width: 50vw;
    height: 50vw;
    bottom: -25vw;
    left: -25vw;
    background: radial-gradient(circle, rgba(var(--accent-rgb), 0.05) 0%, rgba(0,0,0,0) 70%);
    z-index: -1;
    pointer-events: none;
}

/* Mouse Follow Glow */
#mouse-glow {
    position: fixed;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(var(--primary-rgb), 0.06) 0%, rgba(0,0,0,0) 70%);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 9999;
    mix-blend-mode: screen;
    transition: width 0.3s, height 0.3s;
}

/* Glassmorphism Utilities */
.glass {
    background: rgba(12, 12, 16, 0.6);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
}

.glass-hover {
    transition: var(--transition);
}
.glass-hover:hover {
    background: rgba(12, 12, 16, 0.8);
    border-color: rgba(var(--primary-rgb), 0.2);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 1px 1px rgba(var(--primary-rgb), 0.1);
}

/* Preloader */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--bg-color);
    z-index: 99999;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    font-family: var(--font-heading);
}

.loader-container {
    text-align: center;
    width: 300px;
}

.loader-bar {
    width: 100%;
    height: 2px;
    background: var(--text-tertiary);
    margin-top: 15px;
    position: relative;
    overflow: hidden;
    border-radius: 2px;
}

.loader-progress {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transition: width 0.1s ease;
}

.loader-text {
    font-size: 14px;
    letter-spacing: 0.2em;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.loader-percentage {
    font-size: 40px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 5px;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

nav.scrolled {
    padding: 15px 40px;
    background: rgba(5, 5, 7, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

/* 3D Canvas Background Container */
#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -2;
    pointer-events: none;
}

.logo {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

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

.nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 0.05em;
    transition: var(--transition);
    text-transform: uppercase;
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 0 10%;
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -3;
    background: radial-gradient(circle at 80% 50%, rgba(var(--primary-rgb), 0.1) 0%, rgba(0,0,0,0) 60%),
                url('Mclaren F1.jpg') no-repeat center right;
    background-size: cover;
    opacity: 0.25; /* Made more transparent to let the 3D car glow stand out */
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, var(--bg-color) 35%, rgba(5, 5, 7, 0.6) 70%, rgba(5, 5, 7, 0.2) 100%);
    z-index: -1;
}

.hero-content {
    max-width: 650px;
    z-index: 2;
}

.hero-tagline {
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    color: var(--primary);
    margin-bottom: 20px;
    display: block;
}

.hero-title {
    font-size: clamp(40px, 5vw, 72px);
    font-weight: 700;
    margin-bottom: 25px;
    line-height: 1.05;
    letter-spacing: -0.03em;
}

.hero-title span {
    background: linear-gradient(120deg, var(--primary), #ffffff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 550px;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 30px;
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: #000;
    box-shadow: 0 4px 20px rgba(var(--primary-rgb), 0.3);
}

.btn-primary:hover {
    background: #fff;
    color: #000;
    box-shadow: 0 6px 25px rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary);
    transform: translateY(-2px);
}

/* Sections General */
section {
    padding: 120px 10%;
    position: relative;
}

.section-header {
    margin-bottom: 80px;
}

.section-subtitle {
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.25em;
    color: var(--accent);
    margin-bottom: 10px;
    display: block;
}

.section-title {
    font-size: clamp(32px, 3.5vw, 48px);
    font-weight: 700;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: flex-start;
}

.about-left {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.about-text h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.about-text p {
    margin-bottom: 20px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.stat-box {
    padding: 30px;
    text-align: center;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 48px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.skills-category {
    padding: 40px;
}

.skills-category h3 {
    font-size: 20px;
    margin-bottom: 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.skills-category h3 span {
    font-size: 12px;
    text-transform: uppercase;
    color: var(--primary);
}

.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.skill-tag {
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 30px;
    font-size: 14px;
    color: var(--text-secondary);
    transition: var(--transition);
}

.skill-tag:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(0, 209, 255, 0.05);
    transform: translateY(-2px);
}

/* Projects Section */
.projects-container {
    display: flex;
    flex-direction: column;
    gap: 120px;
}

.project-card {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
    align-items: center;
}

.project-card.reverse {
    grid-template-columns: 0.9fr 1.1fr;
}

.project-card.reverse .project-media {
    order: 2;
}

.project-media {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    aspect-ratio: 16/10;
}

/* Before/After CAD Slider */
.slider-container {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    user-select: none;
}

.slider-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slider-before {
    z-index: 1;
}

.slider-after {
    z-index: 2;
    clip-path: polygon(0 0, 50% 0, 50% 100%, 0 100%);
}

.slider-handle {
    position: absolute;
    top: 0;
    left: 50%;
    width: 4px;
    height: 100%;
    background: var(--primary);
    z-index: 3;
    cursor: ew-resize;
    transform: translateX(-50%);
}

.slider-button {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40px;
    height: 40px;
    background: var(--primary);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    justify-content: center;
    align-items: center;
    color: #000;
    font-weight: bold;
    box-shadow: 0 0 15px rgba(0, 209, 255, 0.5);
    pointer-events: none;
}

.slider-button::before, .slider-button::after {
    content: '';
    position: absolute;
    border: 5px solid transparent;
}

.slider-button::before {
    border-right-color: #000;
    left: 8px;
}

.slider-button::after {
    border-left-color: #000;
    right: 8px;
}

.project-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
    background: rgba(12, 12, 16, 0.55);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 40px;
    transition: var(--transition);
}

.project-info:hover {
    background: rgba(12, 12, 16, 0.7);
    border-color: rgba(var(--primary-rgb), 0.2);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4), 0 0 1px 1px rgba(var(--primary-rgb), 0.15);
}

.project-software {
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--primary);
}

.project-title {
    font-size: 32px;
    font-weight: 700;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

.project-desc {
    font-size: 16px;
    color: var(--text-secondary);
}

.project-metrics {
    display: flex;
    gap: 30px;
    margin: 10px 0;
}

.metric {
    display: flex;
    flex-direction: column;
}

.metric-val {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.metric-label {
    font-size: 11px;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.project-tags span {
    font-size: 12px;
    padding: 5px 12px;
    background: rgba(255,255,255,0.03);
    border-radius: 4px;
    color: var(--text-secondary);
}

/* Learning Journey Section */
.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary), var(--accent));
}

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

.timeline-item::before {
    content: '';
    position: absolute;
    left: -35px;
    top: 5px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--bg-color);
    border: 2px solid var(--primary);
}

.timeline-date {
    font-family: var(--font-heading);
    font-size: 14px;
    color: var(--primary);
    margin-bottom: 10px;
    display: block;
}

.timeline-title {
    font-size: 20px;
    font-weight: 500;
    margin-bottom: 10px;
}

.timeline-desc {
    color: var(--text-secondary);
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.contact-method {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.contact-method h4 {
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
}

.contact-method a {
    font-size: 20px;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

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

.contact-form {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.form-group.full-width {
    grid-column: span 2;
}

.form-group label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
}

.form-group input, .form-group textarea {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 15px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 14px;
    transition: var(--transition);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.04);
}

.form-group textarea {
    height: 150px;
    resize: none;
}

.contact-form button {
    grid-column: span 2;
    justify-self: start;
}

/* Footer */
footer {
    padding: 40px 10%;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-secondary);
}

.footer-socials {
    display: flex;
    gap: 20px;
}

.footer-socials a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-socials a:hover {
    color: var(--primary);
}

/* Interactive Air-mode Scroll Path (CodePen style) */
.scroll-path-container {
    position: fixed;
    top: 0;
    right: 5%;
    width: 80px;
    height: 100vh;
    z-index: 100;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    padding: 80px 0;
}

.scroll-line {
    position: absolute;
    top: 80px;
    bottom: 80px;
    width: 1px;
    background: rgba(255, 255, 255, 0.1);
}

.scroll-progress-line {
    position: absolute;
    top: 80px;
    width: 1px;
    background: linear-gradient(180deg, var(--primary), var(--accent));
    height: 0;
}

.scrolling-car-icon {
    position: absolute;
    top: 80px;
    transform: translate(-50%, -50%) rotate(90deg);
    left: 50%;
    width: 24px;
    height: 24px;
    color: var(--primary);
    filter: drop-shadow(0 0 8px var(--primary));
    z-index: 101;
    transition: transform 0.1s ease-out;
}

/* Responsive Design */
@media (max-width: 1024px) {
    nav {
        padding: 20px;
    }
    .about-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    .project-card, .project-card.reverse {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .project-card.reverse .project-media {
        order: 0;
    }
    .project-info {
        padding: 30px;
    }
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    .scroll-path-container {
        display: none; /* Hide on tablets and mobile to save screen space */
    }
}

@media (max-width: 768px) {
    .logo-lastname {
        display: none; /* Hide middle/last name on mobile to fit screen */
    }
    .nav-links {
        display: none; /* Can add a simple mobile menu or keep it clean */
    }
    .hero {
        padding: 0 5%;
    }
    .hero-buttons {
        flex-direction: column;
    }
    .about-stats {
        grid-template-columns: 1fr;
    }
    .project-info {
        padding: 20px;
        gap: 15px;
    }
    .form-group.full-width {
        grid-column: span 1;
    }
    .contact-form {
        grid-template-columns: 1fr;
    }
    .contact-form button {
        grid-column: span 1;
        width: 100%;
    }
}

/* Accordion Section Containers */
.portfolio-accordion {
    display: flex;
    flex-direction: column;
    gap: 30px;
    margin-top: 40px;
}

.portfolio-section {
    border-radius: 20px;
    background: rgba(12, 12, 16, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.05);
    overflow: hidden;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.portfolio-section:hover {
    border-color: rgba(var(--primary-rgb), 0.15);
}

.portfolio-section.expanded {
    border-color: rgba(var(--primary-rgb), 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 0 1px 1px rgba(var(--primary-rgb), 0.1);
}

/* Accordion Section Headers */
.portfolio-section-header {
    padding: 30px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    background: rgba(12, 12, 16, 0.6);
    user-select: none;
    transition: background 0.3s ease;
}

.portfolio-section-header:hover {
    background: rgba(12, 12, 16, 0.8);
}

.portfolio-header-text {
    display: flex;
    align-items: center;
    gap: 15px;
}

.section-number {
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 0.1em;
}

.portfolio-section-title {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

/* Animated Car Door Toggle Icon */
.car-toggle-container {
    width: 65px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.car-toggle-icon {
    width: 100%;
    height: 100%;
    color: var(--text-secondary);
    transition: color 0.3s ease, transform 0.3s ease;
}

.portfolio-section-header:hover .car-toggle-icon {
    color: var(--primary);
    filter: drop-shadow(0 0 8px rgba(var(--primary-rgb), 0.5));
}

.portfolio-section.expanded .car-toggle-icon {
    color: var(--primary);
    filter: drop-shadow(0 0 8px rgba(var(--primary-rgb), 0.6));
}

/* Door Animation Rotation */
.door-group {
    transition: transform 0.6s cubic-bezier(0.25, 1, 0.3, 1.1);
}

.left-door-group {
    transform-origin: 36px 14px;
}

.right-door-group {
    transform-origin: 36px 46px;
}

/* Open doors when expanded */
.portfolio-section.expanded .left-door-group {
    transform: rotate(-38deg);
}

.portfolio-section.expanded .right-door-group {
    transform: rotate(38deg);
}

/* Accordion Section Contents */
.portfolio-section-content {
    padding: 0;
    height: 0;
    overflow: hidden;
    display: none;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.portfolio-section.expanded > .portfolio-section-content {
    padding: 40px;
    height: auto;
    overflow: visible;
    display: block;
    opacity: 1;
}

/* Product Portfolio Grids */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.portfolio-card-item {
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.portfolio-card-media {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
    background: #000;
}

.portfolio-card-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.portfolio-card-item:hover .portfolio-card-media img {
    transform: scale(1.05);
}

.portfolio-media-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(5, 5, 7, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.portfolio-card-media:hover .portfolio-media-overlay {
    opacity: 1;
}

/* SOLIDWORKS Slide Controller */
.portfolio-card-slider-container {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
    background: #000;
}

.sw-slides {
    width: 100%;
    height: 100%;
    position: relative;
}

.sw-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.sw-slide.active {
    opacity: 1;
    visibility: visible;
    z-index: 1;
}

.sw-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sw-slide-label {
    position: absolute;
    bottom: 12px;
    left: 15px;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(4px);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 500;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    z-index: 2;
}

.sw-slide-link {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--primary);
    color: #000;
    padding: 8px 16px;
    border-radius: 6px;
    font-family: var(--font-heading);
    font-size: 12px;
    font-weight: 500;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 3;
    box-shadow: 0 4px 15px rgba(var(--primary-rgb), 0.4);
}

.portfolio-card-slider-container:hover .sw-slide-link {
    opacity: 1;
}

.sw-slide-controls {
    position: absolute;
    bottom: 15px;
    right: 15px;
    display: flex;
    gap: 8px;
    z-index: 4;
}

.sw-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: background 0.3s ease, transform 0.3s ease;
}

.sw-dot:hover, .sw-dot.active {
    background: var(--primary);
    transform: scale(1.2);
}

/* Card details */
.portfolio-card-info {
    padding: 25px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex-grow: 1;
}

.card-software {
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
    color: var(--primary);
    letter-spacing: 0.1em;
}

.card-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.card-footer {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: auto;
    padding-top: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.03);
}

.card-tag {
    font-size: 10px;
    padding: 3px 8px;
    background: rgba(255,255,255,0.03);
    border-radius: 3px;
    color: var(--text-secondary);
}

/* EV Card Custom Graphic & Subtopics */
.ev-card-graphic {
    aspect-ratio: 16/10;
    background: radial-gradient(circle at center, #0c1424 0%, #050811 100%);
    position: relative;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

.ev-circuit-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(var(--primary) 1px, transparent 1px),
        linear-gradient(rgba(0, 209, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 209, 255, 0.05) 1px, transparent 1px);
    background-size: 40px 40px, 20px 20px, 20px 20px;
    background-position: center;
    opacity: 0.3;
}

.ev-battery-indicator {
    width: 120px;
    height: 60px;
    border: 3px solid rgba(0, 209, 255, 0.3);
    border-radius: 8px;
    position: relative;
    display: flex;
    align-items: center;
    padding: 4px;
    box-shadow: 0 0 20px rgba(0, 209, 255, 0.1);
}

.ev-battery-indicator::after {
    content: '';
    position: absolute;
    right: -9px;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 20px;
    background: rgba(0, 209, 255, 0.3);
    border-radius: 0 3px 3px 0;
}

.ev-battery-core {
    height: 100%;
    width: 85%;
    background: linear-gradient(90deg, var(--primary), #a3f7ff);
    border-radius: 4px;
    position: relative;
    box-shadow: 0 0 15px rgba(0, 209, 255, 0.6);
    animation: ev-pulse 2s infinite ease-in-out;
}

@keyframes ev-pulse {
    0%, 100% { opacity: 0.8; box-shadow: 0 0 15px rgba(0, 209, 255, 0.5); }
    50% { opacity: 1; box-shadow: 0 0 25px rgba(0, 209, 255, 0.9); }
}

.ev-label {
    position: absolute;
    bottom: 15px;
    font-family: var(--font-heading);
    font-size: 10px;
    letter-spacing: 0.2em;
    color: var(--primary);
    opacity: 0.8;
}

.ev-subtopics {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 5px;
}

.ev-subtopic {
    border-left: 2px solid var(--accent);
    padding-left: 12px;
}

.ev-subtopic h5 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.ev-subtopic p {
    font-size: 12px;
    line-height: 1.4;
    color: var(--text-secondary);
}

/* Work Experience Staging Terminal */
.work-exp-placeholder {
    display: flex;
    justify-content: center;
    padding: 20px 0;
}

.exp-terminal {
    width: 100%;
    max-width: 750px;
    background: #08080c;
    border: 1px solid rgba(255, 59, 59, 0.2);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 15px 30px rgba(0,0,0,0.5), 0 0 15px rgba(255, 59, 59, 0.05);
}

.term-header {
    background: #0f0f15;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.term-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.term-dot:nth-child(1) { background: #ff5f56; }
.term-dot:nth-child(2) { background: #ffbd2e; }
.term-dot:nth-child(3) { background: #27c93f; }

.term-title {
    font-family: var(--font-heading);
    font-size: 11px;
    color: var(--text-secondary);
    margin-left: auto;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.term-body {
    padding: 20px;
    font-family: monospace;
    font-size: 13px;
    line-height: 1.6;
    color: #a9b7c6;
}

.term-line {
    margin-bottom: 8px;
}

.term-prompt {
    color: var(--primary);
}

.term-body .text-warning {
    color: var(--accent);
}

.term-body .text-fade {
    opacity: 0.5;
}

.term-body .text-primary {
    color: var(--primary);
}

.term-cursor {
    display: inline-block;
    width: 8px;
    height: 15px;
    background: var(--primary);
    animation: blink-cursor 1s infinite steps(2);
    margin-top: 5px;
}

@keyframes blink-cursor {
    0%, 100% { opacity: 0; }
    50% { opacity: 1; }
}

/* Button size utility */
.btn-sm {
    padding: 8px 16px;
    font-size: 12px;
    border-radius: 6px;
}

@media (max-width: 768px) {
    .portfolio-section-header {
        padding: 20px;
    }
    .portfolio-section-title {
        font-size: 18px;
    }
    .portfolio-section.expanded > .portfolio-section-content {
        padding: 20px;
    }
}

/* ==========================================================================
   ENHANCED PORTFOLIO UI ADDITIONS (TABS, SLIDERS, TABLES, REDACTED TERMINAL)
   ========================================================================== */

/* Card Tabs System */
.card-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding-bottom: 10px;
}
.tab-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
    padding: 6px 14px;
    font-size: 11px;
    font-family: var(--font-heading);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    cursor: pointer;
    border-radius: 4px;
    transition: var(--transition);
}
.tab-btn:hover {
    border-color: var(--primary);
    color: var(--text-primary);
    background: rgba(0, 209, 255, 0.05);
}
.tab-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #000;
    font-weight: 600;
    box-shadow: 0 0 10px rgba(0, 209, 255, 0.25);
}
.tab-panel {
    display: none;
}
.tab-panel.active {
    display: block;
    animation: tabFadeIn 0.4s ease-out;
}
.tab-scroll-panel {
    height: 350px;
    overflow-y: auto;
    padding-right: 8px;
    scrollbar-width: thin;
    scrollbar-color: var(--primary) rgba(255, 255, 255, 0.02);
}
.tab-scroll-panel::-webkit-scrollbar {
    width: 4px;
}
.tab-scroll-panel::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.02);
}
.tab-scroll-panel::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 2px;
}

@keyframes tabFadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Scientific Paper Typography */
.research-paper {
    font-family: 'Outfit', sans-serif;
    font-size: 13px;
    line-height: 1.7;
    color: var(--text-secondary);
    text-align: justify;
}
.research-paper h4 {
    color: var(--text-primary);
    font-size: 15px;
    margin-top: 15px;
    margin-bottom: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.research-paper h4:first-of-type {
    margin-top: 0;
}
.research-paper p {
    margin-bottom: 14px;
}
.research-paper strong {
    color: var(--primary);
}

/* Technical Specifications Table */
.specs-table-wrapper {
    overflow-x: auto;
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    background: rgba(0, 0, 0, 0.2);
}
.specs-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 11px;
    text-align: left;
    min-width: 500px;
}
.specs-table th {
    background: rgba(0, 209, 255, 0.06);
    color: var(--primary);
    padding: 10px 12px;
    font-weight: 600;
    border-bottom: 1px solid rgba(0, 209, 255, 0.15);
    font-family: var(--font-heading);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.specs-table td {
    padding: 8px 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
    vertical-align: top;
    line-height: 1.4;
}
.specs-table tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.01);
}
.specs-table tr:hover td {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.02);
}

/* Media Slideshow / Multi-Media Slider */
.project-media-slider {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}
.slider-slides {
    width: 100%;
    height: 100%;
    position: relative;
}
.media-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    z-index: 1;
    transition: opacity 0.5s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
}
.media-slide.active {
    opacity: 1;
    z-index: 2;
}
.media-slide img, .media-slide video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.slider-controls {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    gap: 6px;
    background: rgba(0, 0, 0, 0.6);
    padding: 5px 10px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
}
.slider-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.35);
    cursor: pointer;
    transition: var(--transition);
}
.slider-dot:hover, .slider-dot.active {
    background: var(--primary);
    box-shadow: 0 0 6px var(--primary);
}

/* PDF Drawing Viewport */
.pdf-iframe-container {
    width: 100%;
    height: 350px;
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    background: #000;
}
.pdf-iframe-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* Work Experience Redacted Terminal */
.work-experience-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.work-experience-summary {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
    max-width: 850px;
}
.work-experience-summary strong {
    color: var(--text-primary);
}

.exp-terminal-layout {
    display: flex;
    flex-direction: row;
    height: 500px;
    background: #050508;
    border: 1px solid rgba(0, 209, 255, 0.15);
    box-shadow: 0 0 25px rgba(0, 209, 255, 0.05);
    border-radius: 8px;
    overflow: hidden;
}
.terminal-sidebar {
    width: 250px;
    background: rgba(10, 10, 15, 0.85);
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
    padding: 16px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(0, 209, 255, 0.3) rgba(0, 0, 0, 0.2);
}
.terminal-sidebar::-webkit-scrollbar {
    width: 3px;
}
.terminal-sidebar::-webkit-scrollbar-thumb {
    background: rgba(0, 209, 255, 0.3);
}
.terminal-sidebar h4 {
    font-family: var(--font-heading);
    font-size: 10px;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 12px;
    padding-bottom: 6px;
    border-bottom: 1px solid rgba(0, 209, 255, 0.25);
}
.script-selectors-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.script-item-btn {
    background: none;
    border: none;
    text-align: left;
    font-family: monospace;
    font-size: 11px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px 10px;
    border-radius: 4px;
    transition: var(--transition);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.script-item-btn:hover {
    background: rgba(255, 255, 255, 0.03);
    color: var(--primary);
}
.script-item-btn.active {
    background: rgba(0, 209, 255, 0.08);
    color: var(--primary);
    border-left: 2px solid var(--primary);
    padding-left: 8px;
}
.terminal-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: #020204;
}
.terminal-viewer-body {
    flex: 1;
    padding: 24px;
    font-family: monospace;
    font-size: 12px;
    line-height: 1.7;
    color: #a9b7c6;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--primary) rgba(255, 255, 255, 0.02);
}
.terminal-viewer-body::-webkit-scrollbar {
    width: 4px;
}
.terminal-viewer-body::-webkit-scrollbar-thumb {
    background: var(--primary);
}
.script-meta {
    color: #808080;
    border-bottom: 1px dashed rgba(255, 255, 255, 0.1);
    padding-bottom: 10px;
    margin-bottom: 15px;
    font-size: 11px;
}
.script-meta strong {
    color: var(--primary);
}
.redacted-block {
    background: #404040;
    color: #404040;
    display: inline-block;
    height: 1.1em;
    vertical-align: middle;
    border-radius: 1px;
    margin: 1px 0;
    user-select: none;
}
.redacted-line {
    opacity: 0.15;
    filter: blur(3.5px);
    user-select: none;
    margin-bottom: 6px;
    line-height: 1.3;
}

@media (max-width: 768px) {
    .exp-terminal-layout {
        flex-direction: column;
        height: 550px;
    }
    .terminal-sidebar {
        width: 100%;
        height: 160px;
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
}