/* ------------------- */
/* Basic Setup & Reset */
/* ------------------- */
:root {
    --font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
        Roboto, Helvetica, Arial, sans-serif;
}

/* Skip to content (a11y) */
.skip-to-content {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 9999;
    background: var(--accent-color);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 0 0 8px 0;
    font-weight: 600;
    text-decoration: none;
}
.skip-to-content:focus {
    left: 0;
}

/* Dark Theme (Default) */
[data-theme="dark"] {
    --bg-dark: #0d1117;
    --bg-medium: #161b22;
    --border-color: #30363d;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --accent-color: #58a6ff;
    --accent-hover: #79c0ff;
    --cta-text-color: #0d1117;
}

/* Light Theme */
[data-theme="light"] {
    --bg-dark: #fefefe;
    --bg-medium: #f8fafc;
    --bg-card: #ffffff;
    --bg-subtle: #f1f5f9;
    --bg-gradient-start: #ffffff;
    --bg-gradient-end: #f8fafc;

    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    --border-accent: #cbd5e1;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --text-accent: #1e293b;

    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --accent-light: #dbeafe;
    --accent-secondary: #8b5cf6;
    --accent-gradient-start: #3b82f6;
    --accent-gradient-end: #8b5cf6;

    --cta-text-color: #ffffff;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
        0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
        0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
        0 10px 10px -5px rgba(0, 0, 0, 0.04);

    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --info-color: #06b6d4;

    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(255, 255, 255, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-family);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

[data-theme="light"] body {
    background: radial-gradient(
        ellipse at top,
        #f8fafc 0%,
        #ffffff 50%,
        #f1f5f9 100%
    );
    background-attachment: fixed;
}

main {
    padding-top: 80px;
}

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

h1,
h2,
h3 {
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 1rem;
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
}

[data-theme="light"] h2 {
    background: linear-gradient(
        135deg,
        var(--accent-color),
        var(--accent-secondary)
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

[data-theme="light"] p {
    color: var(--text-primary);
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-hover);
}

section {
    padding: 6rem 0;
    transition: background-color 0.3s ease;
}

ul,
ol {
    list-style: none; /* Removes the bullet points/numbers */
    margin: 0;
    padding: 0;
}

.timeline-dot {
    display: inline-block;
}

/* ------------------- */
/* Header & Navigation */
/* ------------------- */
.site-header {
    background-color: rgba(13, 17, 23, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: background-color 0.3s ease, border-bottom 0.3s ease;
}

[data-theme="light"] .site-header {
    background-color: rgba(255, 255, 255, 0.8);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative; /* Added for positioning context */
}

.logo {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--text-primary);
}

/* Added rule to center the navigation */
.main-nav {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.main-nav ul {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.main-nav a {
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding-bottom: 4px;
}

.main-nav a::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-color), var(--accent-hover));
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
    border-radius: 1px;
}

.main-nav a:hover {
    color: var(--text-primary);
}

.main-nav a:hover::after,
.main-nav a.active::after {
    transform: scaleX(1);
    transform-origin: left;
}

.main-nav a.active {
    color: var(--accent-color);
    font-weight: 600;
}



/* ------------------- */
/* Hero Section */
/* ------------------- */
.hero-section {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 80vh;
    text-align: center;
    position: relative;
    overflow: hidden;

    /* Galaxy gradient background */
    background: linear-gradient(135deg, #0d1b2a 0%, #1b263b 40%, #0f172a 100%);
    color: #e2e8f0;
}

/* Subtle star field */
.hero-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100"><circle cx="2" cy="2" r="1" fill="white" opacity="0.8"/><circle cx="30" cy="40" r="1.2" fill="white" opacity="0.6"/><circle cx="70" cy="80" r="1.5" fill="white" opacity="0.7"/><circle cx="90" cy="20" r="1" fill="white" opacity="0.9"/></svg>');
    background-size: 150px 150px;
    animation: star-drift 60s linear infinite;
    z-index: 0;
}

/* Floating nebula effect (soft glow) */
.hero-section::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(
            circle at 30% 30%,
            rgba(255, 0, 150, 0.2),
            transparent 70%
        ),
        radial-gradient(
            circle at 70% 70%,
            rgba(0, 200, 255, 0.2),
            transparent 70%
        );
    animation: nebula-shift 40s ease-in-out infinite alternate;
    z-index: 0;
}

/* Text on top of stars */
.hero-section > * {
    position: relative;
    z-index: 1;
}

/* Animations */
@keyframes star-drift {
    from {
        transform: translateY(0);
    }
    to {
        transform: translateY(-200px);
    }
}

@keyframes nebula-shift {
    from {
        transform: scale(1) translate(0, 0);
    }
    to {
        transform: scale(1.2) translate(-20px, -10px);
    }
}

.hero-content {
    max-width: 900px;
    padding: 0 1rem;
}

.hero-headline {
    font-size: 3.5rem;
    font-weight: 700;
    color: #ffffff !important;
}

.hero-subheadline {
    font-size: 1.25rem;
    max-width: 650px;
    margin: 1.5rem auto 2.5rem;
    color: #e2e8f0 !important;
}

.cta-button {
    background: linear-gradient(
        135deg,
        var(--accent-color),
        var(--accent-hover)
    );
    color: var(--cta-text-color);
    padding: 0.9rem 2.2rem;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1rem;
    display: inline-block;
    transition: all 0.3s ease;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15),
        0 0 20px rgba(88, 166, 255, 0.15);
    letter-spacing: 0.5px;
    cursor: pointer;
    animation: cta-glow 3s ease-in-out infinite;
}

@keyframes cta-glow {
    0%, 100% { box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15), 0 0 20px rgba(88, 166, 255, 0.1); }
    50% { box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15), 0 0 30px rgba(88, 166, 255, 0.3); }
}

.cta-button:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2),
        0 0 35px rgba(88, 166, 255, 0.35);
    filter: brightness(1.05);
    animation: none;
}

.cta-button:active {
    transform: translateY(-1px) scale(0.98);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2) inset;
    animation: none;
}

/* ------------------- */
/* About Section */
/* ------------------- */
.about-section {
    background-color: var(--bg-medium);
}

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

.profile-picture {
    width: 100%;
    max-width: 350px;
    border-radius: 12px;
    border: 3px solid transparent;
    background-clip: padding-box;
    outline: 3px solid var(--accent-color);
    outline-offset: 4px;
    transition: outline-color 0.5s ease, transform 0.3s ease;
}

.profile-picture:hover {
    outline-color: var(--accent-hover);
    transform: scale(1.02);
}

.about-text h2 {
    text-align: left;
    margin-bottom: 1.5rem;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
    justify-content: center;
}

.tech-stack span {
    background-color: rgba(88, 166, 255, 0.1);
    color: var(--accent-color);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
}

[data-theme="light"] .tech-stack span {
    background-color: rgba(9, 105, 218, 0.1);
}

/* ------------------- */
/* Projects Section */
/* ------------------- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    background-color: var(--bg-medium);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease,
        background-color 0.3s ease, border-color 0.3s ease;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15),
        0 0 20px rgba(88, 166, 255, 0.1);
    border-color: var(--accent-color);
}

.project-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.project-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-content h3 {
    font-size: 1.5rem;
}

/* Improved Project Tags Styling */
.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin: 1.5rem 0;
    list-style: none;
    padding: 0;
}

.project-tags span,
.project-tags li {
    position: relative;
    background: linear-gradient(
        135deg,
        var(--border-color, #e0e0e0) 0%,
        var(--border-light, #f0f0f0) 100%
    );
    color: var(--text-secondary, #666666);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: 1px solid transparent;
    overflow: hidden;
    letter-spacing: 0.025em;
}

/* Hover Animation Effect */
.project-tags span::before,
.project-tags li::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        var(--accent-color, #667eea) 0%,
        var(--accent-secondary, #764ba2) 100%
    );
    transition: left 0.3s ease;
    z-index: -1;
}

.project-tags span:hover,
.project-tags li:hover {
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.3);
    border-color: var(--accent-color, #667eea);
}

.project-tags span:hover::before,
.project-tags li:hover::before {
    left: 0;
}

/* Active/Featured Tag Styling */
.project-tags span.featured,
.project-tags li.featured {
    background: linear-gradient(
        135deg,
        var(--accent-color, #667eea) 0%,
        var(--accent-secondary, #764ba2) 100%
    );
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.25);
    font-weight: 600;
}

.project-tags span.featured:hover,
.project-tags li.featured:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

/* Category-specific Colors */
.project-tags span.tech,
.project-tags li.tech {
    border-left: 3px solid #3498db;
}

.project-tags span.framework,
.project-tags li.framework {
    border-left: 3px solid #e74c3c;
}

.project-tags span.tool,
.project-tags li.tool {
    border-left: 3px solid #2ecc71;
}

.project-tags span.language,
.project-tags li.language {
    border-left: 3px solid #f39c12;
}

.project-tags span.database,
.project-tags li.database {
    border-left: 3px solid #9b59b6;
}

/* Pulse Animation for New/Important Tags */
.project-tags span.pulse,
.project-tags li.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(102, 126, 234, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(102, 126, 234, 0);
    }
}

/* Interactive States */
.project-tags span:active,
.project-tags li:active {
    transform: translateY(0);
    transition: transform 0.1s ease;
}

/* Focus States for Accessibility */
.project-tags span:focus,
.project-tags li:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.3);
}

.project-link {
    margin-top: auto;
    font-weight: 500;
}

/* ------------------- */
/* Experience Section */
/* ------------------- */
.experience-section {
    background-color: var(--bg-medium);
}

.timeline {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    padding-left: 2rem;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--border-color);
    transition: background-color 0.3s ease;
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -2.5rem;
    top: 0.25rem;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: var(--accent-color);
    border: 3px solid var(--bg-medium);
    transform: translateX(-50%);
    transition: background-color 0.3s ease, border-color 0.3s ease;
    animation: dot-pulse 2.5s ease-in-out infinite;
}

@keyframes dot-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(88, 166, 255, 0.4); }
    50% { box-shadow: 0 0 0 6px rgba(88, 166, 255, 0); }
}

.timeline-date {
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.timeline-content h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.timeline-company {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.timeline-link {
    display: inline-block;
    margin-top: 0.75rem;
    font-weight: 500;
}

/* ------------------- */
/* Contact Section */
/* ------------------- */
.contact-section {
    text-align: center;
}

.contact-section p {
    max-width: 500px;
    margin: 0 auto 2rem;
}

.social-links {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

.social-links a {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
}

.social-links a::after {
    content: "";
    position: absolute;
    width: 100%;
    height: 1px;
    background: var(--accent-color);
    bottom: -4px;
    left: 0;
    transform: scaleX(0);
    transform-origin: bottom right;
    transition: transform 0.3s ease-out;
}

.social-links a:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.tech-stack li {
    background-color: rgba(88, 166, 255, 0.1);
    color: var(--accent-color);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
}

[data-theme="light"] .tech-stack span {
    background-color: rgba(9, 105, 218, 0.1);
}

/* ------------------- */
/* Footer */
/* ------------------- */
.site-footer {
    background-color: var(--bg-medium);
    padding: 2rem 0;
    border-top: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: background-color 0.3s ease, color 0.3s ease;
    position: relative;
}

.site-footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(
        90deg,
        transparent,
        var(--accent-color),
        var(--accent-hover),
        transparent
    );
    border-radius: 1px;
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Styles specific to the project page */
.project-hero {
    text-align: center;
    padding: 8rem 0 4rem 0;
    background-color: var(--bg-medium);
}
.project-hero h1 {
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary, #1a202c);
    text-shadow: 1px 1px 3px rgba(255, 255, 255, 0.6);
}

.project-hero p {
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto;
    color: var(--text-secondary, #4a5568);
    text-shadow: 1px 1px 2px rgba(255, 255, 255, 0.4);
}

.project-hero {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    color: #2d3748;
    padding: 4rem 0 3rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.project-hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><polygon points="25,15 35,35 15,35" fill="rgba(45,55,72,0.1)"/><rect x="70" y="20" width="8" height="8" fill="rgba(45,55,72,0.08)"/><circle cx="60" cy="70" r="3" fill="rgba(45,55,72,0.12)"/></svg>');
    animation: drift 25s ease-in-out infinite;
}

@keyframes drift {
    0%,
    100% {
        transform: translateX(0) translateY(0) rotate(0deg);
    }
    33% {
        transform: translateX(10px) translateY(-5px) rotate(1deg);
    }
    66% {
        transform: translateX(-5px) translateY(8px) rotate(-1deg);
    }
}

.project-page-content {
    padding: 1rem 0;
}

/* Two-column layout for project details */
.project-details-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    margin-bottom: 4rem;
}

.project-section h2 {
    font-size: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
    margin-bottom: 2rem;
}

main .project-section p {
    font-size: 1.15rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.5rem;
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
    line-height: 1.7;
}

.project-section {
    padding: 4rem 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}
.features-grid article {
    background-color: var(--bg-medium);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}
.features-grid h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}
.features-grid ul {
    list-style-type: none;
    padding-left: 0;
}
.features-grid ul li {
    margin-bottom: 0.75rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

/* Sidebar styles */
.project-sidebar article {
    background-color: var(--bg-medium);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    position: sticky;
    top: 120px; /* Adjust based on header height */
}

.tech-stack {
    flex-wrap: wrap;
}

/* Sideways scrolling gallery (Unchanged as requested) */
.gallery-grid {
    display: flex;
    gap: 1rem;
    overflow-x: auto;
    white-space: nowrap;
    padding: 1rem 0;
    -webkit-overflow-scrolling: touch;
}
.gallery-grid::-webkit-scrollbar {
    height: 8px;
}
.gallery-grid::-webkit-scrollbar-track {
    background: var(--bg-medium);
    border-radius: 10px;
}
.gallery-grid::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 10px;
    border: 2px solid var(--bg-medium);
}
.gallery-grid::-webkit-scrollbar-thumb:hover {
    background-color: var(--text-secondary);
}
.gallery-grid figure {
    flex: 0 0 auto;
    width: 280px;
    height: 520px;
    margin: 0;
    overflow: hidden;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.gallery-grid.gallery-grid-landscape figure {
    flex: 0 0 auto;
    width: 380px;
    height: 285px;
    margin: 0;
    overflow: hidden;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.gallery-grid figure:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}
.gallery-grid img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.back-link {
    display: inline-block;
    margin-top: 2rem;
    font-weight: 500;
}

.video-showcase-wrapper {
    margin-top: 1rem;
    width: 100%;
    display: flex;
    justify-content: center;
}

.video-showcase-wrapper video {
    width: 100%;
    max-width: 900px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

/* Showcase grid for two items */
.showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.showcase-grid img {
    width: 100%;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

/* Style for the single showcase poster */
.showcase-poster {
    margin: 1.5rem 0;
    text-align: center;
}

.showcase-poster img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

/* ------------------- */
/* Experience Page     */
/* ------------------- */

.experience-content ul {
    list-style-position: outside;
    padding-left: 1.5rem;
}

.experience-content ul li {
    margin-bottom: 0.5rem;
}

.case-study-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.case-study-card {
    background-color: var(--bg-dark);
    border: 1px solid var(--border-color);
    padding: 1rem;
    border-radius: 12px;
}

.case-study-card img {
    width: 100%;
    border-radius: 8px;
    margin-bottom: 1rem;
}
.case-study-card h4 {
    margin-bottom: 0.5rem;
}

.case-study-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* Student project showcase grid */
.student-project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.student-project-card {
    background-color: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: block;
    color: var(--text-primary);
}

.student-project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.student-project-card img {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    border-bottom: 1px solid var(--border-color);
}

.student-project-card-content {
    padding: 1rem 1.25rem;
}

.student-project-card-content h4 {
    margin-bottom: 0.5rem;
}

.student-project-card-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0;
    line-height: 1.5;
}
/* Ubitus Experience Page Styles */

/* Experience Hero Section */
.experience-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0 3rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.experience-hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="40" r="1.5" fill="rgba(255,255,255,0.15)"/><circle cx="40" cy="80" r="1" fill="rgba(255,255,255,0.1)"/></svg>');
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%,
    100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(180deg);
    }
}

.experience-dates {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.experience-hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin: 0.5rem 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.experience-company {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    opacity: 0.95;
}

.experience-location {
    font-size: 1rem;
    opacity: 0.8;
    font-style: italic;
}

/* Layout */
.experience-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 3rem;
    margin: 3rem auto;
    max-width: 1200px;
    align-items: start;
}

/* Sidebar Navigation */
.experience-sidebar {
    position: sticky;
    top: 2rem;
    background: var(--card-background, #ffffff);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color, #e0e0e0);
    transition: all 0.3s ease;
}

.experience-sidebar:hover {
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.experience-sidebar nav > p {
    font-weight: 600;
    color: var(--accent-color, #667eea);
    margin-bottom: 1rem;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.experience-sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.experience-sidebar li {
    margin-bottom: 0.5rem;
}

.experience-sidebar a {
    color: var(--text-color, #333333);
    text-decoration: none;
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    display: block;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    position: relative;
}

.experience-sidebar a:hover {
    background: var(--accent-color, #667eea);
    color: white;
    transform: translateX(5px);
}

.experience-sidebar a::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--accent-color, #667eea);
    border-radius: 2px;
    transition: height 0.2s ease;
}

.experience-sidebar a:hover::before {
    height: 70%;
}

/* Content Area */
.experience-content {
    max-width: none;
}

.experience-overview {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--text-secondary, #666666);
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 3rem;
    border-left: 4px solid var(--accent-color, #667eea);
    position: relative;
    overflow: hidden;
}

.experience-overview::before {
    content: '"';
    font-size: 4rem;
    color: var(--accent-color, #667eea);
    position: absolute;
    top: 1rem;
    left: 1rem;
    opacity: 0.3;
    font-family: Georgia, serif;
}

/* Section Styling */
.experience-content section {
    padding-top: 3rem;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-light, #f0f0f0);
}

.experience-content section:last-of-type {
    border-bottom: none;
}

.experience-content h2 {
    color: var(--heading-color, #2c3e50);
    font-size: 2rem;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.experience-content h2::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(
        90deg,
        var(--accent-color, #667eea),
        var(--accent-secondary, #764ba2)
    );
    border-radius: 2px;
}

.experience-content h3 {
    color: var(--subheading-color, #34495e);
    font-size: 1.4rem;
    margin: 2rem 0 1rem 0;
    font-weight: 600;
}

.experience-content h4 {
    color: var(--accent-color, #667eea);
    font-size: 1.1rem;
    margin: 1.5rem 0 0.5rem 0;
    font-weight: 600;
}

/* Code styling */
code {
    background: var(--code-background, #f8f9fa);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: "Consolas", "Monaco", monospace;
    font-size: 0.9rem;
    color: var(--code-color, #e74c3c);
    border: 1px solid var(--border-light, #e0e0e0);
}

/* Grid Layouts */
.approach-grid,
.comparison-grid,
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.approach-card,
.comparison-card,
.metric-card {
    background: var(--card-background, #ffffff);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-light, #e0e0e0);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.approach-card::before,
.comparison-card::before,
.metric-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(
        90deg,
        var(--accent-color, #667eea),
        var(--accent-secondary, #764ba2)
    );
}

.approach-card:hover,
.comparison-card:hover,
.metric-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.approach-card h4,
.comparison-card h4,
.metric-card h4 {
    color: var(--accent-color, #667eea);
    margin-top: 0;
    margin-bottom: 1rem;
}

/* Skills Section */
.skills-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.skill-category {
    background: var(--card-background, #ffffff);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-light, #e0e0e0);
    transition: all 0.3s ease;
}

.skill-category:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.skill-category h3 {
    color: var(--accent-color, #667eea);
    margin-top: 0;
    margin-bottom: 1.5rem;
    text-align: center;
    position: relative;
}

.skill-category h3::after {
    content: "";
    position: absolute;
    bottom: -0.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 2px;
    background: var(--accent-color, #667eea);
    border-radius: 1px;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.tech-stack li {
    background: linear-gradient(
        135deg,
        var(--accent-color, #667eea),
        var(--accent-secondary, #764ba2)
    );
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s ease;
    cursor: default;
}

.tech-stack li:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* Final Thoughts Section */
.final-thoughts {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 2rem;
    border-radius: 12px;
    margin: 3rem 0;
    border-left: 4px solid var(--accent-color, #667eea);
}

.final-thoughts h2 {
    color: var(--heading-color, #2c3e50);
    margin-top: 0;
}

/* Back Link */
.back-link {
    display: inline-flex;
    align-items: center;
    color: var(--accent-color, #667eea);
    text-decoration: none;
    font-weight: 500;
    margin-top: 3rem;
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--accent-color, #667eea);
    border-radius: 25px;
    transition: all 0.3s ease;
    background: transparent;
}

.back-link:hover {
    background: var(--accent-color, #667eea);
    color: white;
    transform: translateX(-5px);
}

/* Exhibition Media Section */
.exhibition-media {
    margin: 2rem 0 3rem 0;
}

.exhibition-video {
    margin-bottom: 3rem;
}

.exhibition-video h4,
.exhibition-gallery h4 {
    color: var(--accent-color, #667eea);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.demo-video {
    width: 100%;
    max-width: 800px;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
    border: 2px solid var(--border-light, #e0e0e0);
}

.demo-video:hover {
    box-shadow: 0 12px 40px rgba(102, 126, 234, 0.2);
    transform: translateY(-3px);
}

.media-caption {
    font-style: italic;
    color: var(--text-secondary, #666666);
    margin-top: 1rem;
    text-align: center;
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Exhibition Gallery */
.exhibition-gallery {
    margin-top: 2rem;
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 1.5rem;
}

.exhibition-image {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    background: var(--card-background, #ffffff);
    border: 1px solid var(--border-light, #e0e0e0);
}

.exhibition-image:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.15);
}

.exhibition-image img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.exhibition-image:hover img {
    transform: scale(1.05);
}

.exhibition-image figcaption {
    padding: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary, #666666);
    line-height: 1.5;
    background: var(--card-background, #ffffff);
    border-top: 1px solid var(--border-light, #e0e0e0);
}

.project-details-link {
    margin-top: 1.5rem;
}

.button-wrapper {
    text-align: center;
}

/* ------------------- */
/* Responsive Design */
/* ------------------- */
@media (max-width: 768px) {
    h2 {
        font-size: 2rem;
    }

    .site-header .container {
        flex-direction: column;
        gap: 1rem;
        position: static; /* Reset positioning for mobile */
    }

    main {
        padding-top: 160px;
    }

    /* Reset navigation centering for mobile */
    .main-nav {
        position: static;
        transform: none;
    }

    .main-nav ul {
        gap: 1rem;
    }

    .hero-headline {
        font-size: 2.5rem;
    }

    .about-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .profile-picture {
        margin: 0 auto 2rem;
    }

    .about-text h2 {
        text-align: center;
    }

    .footer-container {
        flex-direction: column;
        gap: 0.5rem;
    }

    .project-tags {
        gap: 0.5rem;
        margin: 1rem 0;
    }

    .project-tags span,
    .project-tags li {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }
    .image-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .demo-video {
        max-width: 100%;
    }

    .exhibition-image img {
        height: 200px;
    }

    .exhibition-media {
        margin: 1.5rem 0 2rem 0;
    }
    .experience-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
        margin: 2rem auto;
        padding: 0 1rem;
    }

    .experience-sidebar {
        position: static;
        order: 2;
    }

    .experience-hero h1 {
        font-size: 2.5rem;
    }

    .experience-hero {
        padding: 3rem 0 2rem;
    }

    .approach-grid,
    .comparison-grid,
    .metrics-grid,
    .skills-categories {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .experience-overview {
        padding: 1.5rem;
        margin: 0 1rem 2rem;
    }

    .final-thoughts {
        margin: 2rem 1rem;
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }

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

    .experience-hero {
        padding: 2rem 0 1.5rem;
    }

    .experience-content h2 {
        font-size: 1.6rem;
    }

    .approach-card,
    .comparison-card,
    .metric-card,
    .skill-category {
        padding: 1rem;
    }

    .tech-stack li {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }
}


/* ------------------- */
/* Theme Toggle Button */
/* ------------------- */
.theme-toggle {
    background: none;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.theme-toggle:hover {
    border-color: var(--accent-color);
    transform: rotate(20deg) scale(1.1);
    box-shadow: 0 0 12px rgba(88, 166, 255, 0.3);
}

/* ---------------------------------------- */
/* Dark Theme — Component-Level Overrides   */
/* ---------------------------------------- */

/* Experience Hero — darken gradient */
[data-theme="dark"] .experience-hero {
    background: linear-gradient(135deg, #1a1a3e 0%, #2d1b4e 100%);
}

/* Project Hero — dark variant */
[data-theme="dark"] .project-hero {
    background: linear-gradient(135deg, #1a2a3a 0%, #2a1a3a 100%);
}

[data-theme="dark"] .project-hero::before {
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><polygon points="25,15 35,35 15,35" fill="rgba(255,255,255,0.05)"/><rect x="70" y="20" width="8" height="8" fill="rgba(255,255,255,0.04)"/><circle cx="60" cy="70" r="3" fill="rgba(255,255,255,0.06)"/></svg>');
}

[data-theme="dark"] .project-hero h1 {
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .project-hero p {
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

/* Experience page variables for dark */
[data-theme="dark"] {
    --card-background: #161b22;
    --text-color: #c9d1d9;
    --heading-color: #c9d1d9;
    --subheading-color: #8b949e;
    --border-light: #30363d;
    --code-background: #1c2128;
    --code-color: #ff7b72;
}

/* Experience sidebar */
[data-theme="dark"] .experience-sidebar {
    background: var(--bg-medium);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    border-color: var(--border-color);
}

[data-theme="dark"] .experience-sidebar a {
    color: var(--text-secondary);
}

/* Experience overview */
[data-theme="dark"] .experience-overview {
    background: linear-gradient(135deg, #161b22 0%, #1c2128 100%);
    color: var(--text-secondary);
}

/* Experience cards */
[data-theme="dark"] .approach-card,
[data-theme="dark"] .comparison-card,
[data-theme="dark"] .metric-card {
    background: var(--bg-medium);
    border-color: var(--border-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .skill-category {
    background: var(--bg-medium);
    border-color: var(--border-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

/* Features grid cards */
[data-theme="dark"] .features-grid article {
    background-color: var(--bg-medium);
    border-color: var(--border-color);
}

/* Final thoughts */
[data-theme="dark"] .final-thoughts {
    background: linear-gradient(135deg, #161b22 0%, #1c2128 100%);
}

/* Code blocks */
[data-theme="dark"] code {
    background: var(--code-background);
    border-color: var(--border-color);
    color: var(--code-color);
}

/* Project tags */
[data-theme="dark"] .project-tags span,
[data-theme="dark"] .project-tags li {
    background: linear-gradient(
        135deg,
        var(--bg-medium) 0%,
        var(--border-color) 100%
    );
    color: var(--text-primary);
    border-color: var(--border-color);
}

[data-theme="dark"] .project-tags span:hover,
[data-theme="dark"] .project-tags li:hover {
    box-shadow: 0 6px 20px rgba(88, 166, 255, 0.3);
}

/* Exhibition images */
[data-theme="dark"] .exhibition-image {
    background: var(--bg-medium);
    border-color: var(--border-color);
}

[data-theme="dark"] .exhibition-image figcaption {
    background: var(--bg-medium);
    border-top-color: var(--border-color);
}

/* Case study cards */
[data-theme="dark"] .case-study-card {
    background-color: var(--bg-medium);
    border-color: var(--border-color);
}

/* Student project cards */
[data-theme="dark"] .student-project-card {
    background-color: var(--bg-medium);
    border-color: var(--border-color);
}

[data-theme="dark"] .student-project-card img {
    border-bottom-color: var(--border-color);
}

/* Demo video */
[data-theme="dark"] .demo-video {
    border-color: var(--border-color);
}

/* Gallery */
[data-theme="dark"] .gallery-grid figure {
    border-color: var(--border-color);
}

/* Project sidebar */
[data-theme="dark"] .project-sidebar article {
    background-color: var(--bg-medium);
    border-color: var(--border-color);
}

/* Showcase images */
[data-theme="dark"] .showcase-grid img,
[data-theme="dark"] .showcase-poster img {
    border-color: var(--border-color);
}

/* Scrollbar */
[data-theme="dark"] .gallery-grid::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

[data-theme="dark"] .gallery-grid::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-color: var(--bg-dark);
}

/* ------------------- */
/* Desktop Overrides   */
/* ------------------- */
@media (min-width: 992px) {
    .project-details-grid {
        grid-template-columns: 2fr 1fr;
    }
    .experience-layout {
        grid-template-columns: 220px 1fr;
    }
}

/* -------------------------------- */
/* Scroll Reveal Animations         */
/* -------------------------------- */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-on-scroll.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children for project cards */
.projects-grid .project-card.reveal-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.projects-grid .project-card.reveal-on-scroll:nth-child(3) { transition-delay: 0.2s; }
.projects-grid .project-card.reveal-on-scroll:nth-child(4) { transition-delay: 0.15s; }
.projects-grid .project-card.reveal-on-scroll:nth-child(5) { transition-delay: 0.25s; }
.projects-grid .project-card.reveal-on-scroll:nth-child(6) { transition-delay: 0.2s; }

/* Smooth global transitions for theme switching */
*,
*::before,
*::after {
    transition-property: background-color, border-color, color, box-shadow, outline-color;
    transition-duration: 0.3s;
    transition-timing-function: ease;
}

/* Override for elements that need different transition properties */
a, .cta-button, .project-card, .theme-toggle, .profile-picture,
.timeline-dot, .back-link, .experience-sidebar a {
    transition: all 0.3s ease;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    .reveal-on-scroll {
        opacity: 1;
        transform: none;
        transition: none;
    }
    .timeline-dot { animation: none; }
    .cta-button { animation: none; }
    * { transition-duration: 0.01ms !important; }
}