:root {
    --bg-color: #050505;
    --text-color: #ffffff;
    --accent-color: #ffffff;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.1);
    --header-bg: rgba(5, 5, 5, 0.8);
    /* Modern spring-like easing functions */
    --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-smooth: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.light-theme {
    --bg-color: #f5f5f7;
    --text-color: #1d1d1f;
    --accent-color: #1d1d1f;
    --card-bg: rgba(0, 0, 0, 0.03);
    --card-border: rgba(0, 0, 0, 0.1);
    --header-bg: rgba(245, 245, 247, 0.8);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.5s ease, color 0.5s ease;
    will-change: background-color, color;
}

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

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

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-bottom: 4rem;
}

.hero-content {
    text-align: center;
}

.hero-title {
    font-family: 'Unbounded', sans-serif;
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 900;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.hero-role {
    font-size: 1.5rem;
    font-weight: 400;
    opacity: 0.7;
    margin-bottom: 2rem;
}

/* About Section */
.about-section {
    padding: 0 0 4rem;
}

.about-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.about-role {
    font-family: 'Unbounded', sans-serif;
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 600;
    margin-bottom: 2rem;
    opacity: 0.9;
    text-align: left;
}

.about-description {
    font-size: 1.1rem;
    line-height: 1.8;
    opacity: 0.7;
    text-align: left;
    max-width: 900px;
}

.hero-desc-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    max-width: 600px;
    margin: 0 auto 3rem;
    opacity: 0.8;
}

.bullet {
    color: var(--accent-color);
    font-size: 1.5rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 0.8rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.4s var(--ease-spring);
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    color: var(--text-color);
    will-change: background, color, transform;
    position: relative;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    backface-visibility: hidden;
    transform: translateZ(0);
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--text-color);
    transform: translate(-50%, -50%);
    transition: width 0.6s var(--ease-out-expo), height 0.6s var(--ease-out-expo);
    z-index: -1;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:hover {
    color: var(--bg-color);
    transform: translateY(-3px) translateZ(0);
    border-color: var(--text-color);
}

.btn:active {
    transform: translateY(-1px) translateZ(0);
}

/* Sections */
.section {
    padding: 5rem 0;
}

.section-title {
    font-family: 'Unbounded', sans-serif;
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 2.5rem;
}

/* Skills */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.skill-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 3rem;
    border-radius: 24px;
    transition: transform 0.5s var(--ease-out-back), 
                border-color 0.4s var(--ease-smooth),
                box-shadow 0.4s var(--ease-smooth);
    will-change: transform, border-color, box-shadow;
}

.skill-card:hover {
    transform: translateY(-12px) scale(1.02);
    border-color: var(--text-color);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.skill-card h3 {
    font-family: 'Unbounded', sans-serif;
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.skill-card p {
    opacity: 0.6;
    font-size: 0.95rem;
}

/* Projects */
.projects-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 2.5rem;
}

.project-card-link {
    text-decoration: none;
    color: var(--text-color);
    cursor: pointer;
    max-width: 380px;
}

.project-preview {
    width: 100%;
    height: 160px;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
}

.project-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s var(--ease-out-expo);
    will-change: transform;
}

.project-card-link:hover .project-preview img {
    transform: scale(1.08) rotate(1deg);
}

.project-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
}

.stack-item {
    padding: 0.3rem 0.7rem;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 500;
}

.project-features {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 1rem 0 1.5rem;
    font-size: 0.85rem;
    opacity: 0.7;
}

.project-features span::before {
    content: "✓ ";
    opacity: 0.6;
}

.project-link {
    font-weight: 600;
    font-size: 0.85rem;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.project-link::after {
    content: "→";
    transition: transform 0.5s var(--ease-spring);
    will-change: transform;
    display: inline-block;
}

.project-card-link:hover .project-link::after {
    transform: translateX(8px) scale(1.2);
}

/* SOEX GRC Custom Styles */
.soex-project {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    transition: transform 0.5s var(--ease-out-back), 
                border-color 0.4s var(--ease-smooth),
                box-shadow 0.4s var(--ease-smooth);
    will-change: transform, border-color, box-shadow;
}

.soex-project .project-preview {
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: border-color 0.4s var(--ease-smooth);
}

.soex-project:hover {
    transform: translateY(-12px) scale(1.02);
    border-color: var(--text-color);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.soex-project .stack-item {
    font-family: 'Courier New', Courier, monospace;
    font-weight: 500;
    letter-spacing: -0.01em;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.soex-project:hover .project-preview {
    border-color: rgba(255, 255, 255, 0.2);
}

/* Contacts */
.contacts-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem 2rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    text-decoration: none;
    color: var(--text-color);
    transition: background 0.2s ease, 
                color 0.2s ease,
                transform 0.3s var(--ease-spring),
                border-color 0.2s ease,
                box-shadow 0.3s ease;
    will-change: background, color, transform;
    position: relative;
}

.contact-item:hover {
    background: var(--text-color);
    color: var(--bg-color);
    border-color: var(--text-color);
    transform: translateY(-5px) scale(1.03);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.contact-item:active {
    transform: translateY(-2px) scale(1.01);
}

.contact-item svg {
    flex-shrink: 0;
}

/* Footer */
.main-footer {
    padding: 4rem 2rem;
    text-align: center;
    opacity: 0.4;
    font-size: 0.8rem;
    border-top: 1px solid var(--card-border);
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(50px) scale(0.95);
    transition: opacity 0.8s var(--ease-out-expo), 
                transform 0.8s var(--ease-out-expo);
    will-change: opacity, transform;
}

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

.hero-title {
    display: inline-block;
}

.typewriter-active::after {
    content: "";
    display: inline-block;
    width: 3px;
    height: 0.9em;
    background-color: var(--accent-color);
    margin-left: 2px;
    vertical-align: baseline;
    animation: blink-bg 0.7s step-end infinite;
}

.typewriter-finished::after {
    display: none;
}

.code-snippet-container {
    margin: 1.5rem auto 3rem;
    max-width: 450px;
    text-align: left;
    min-height: 160px; /* Increased to accommodate multi-line Python snippet */
}

#code-typing.cursor-hidden {
    border-right-color: transparent;
    animation: none;
}

.fade-out-text {
    opacity: 0 !important;
    transition: opacity 1.5s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

.code-snippet-container pre {
    margin: 0;
    font-family: 'Courier New', Courier, monospace;
    font-size: 1rem;
    line-height: 1.5;
    color: #fff;
    white-space: pre-wrap;
    opacity: 1;
    transition: opacity 1s ease;
}

#code-typing {
    display: inline;
    vertical-align: top;
}

#code-typing::after {
    content: "";
    display: inline-block;
    width: 2px;
    height: 1.1em;
    background-color: var(--accent-color);
    margin-left: 1px;
    vertical-align: -0.15em;
    animation: blink-bg 0.7s step-end infinite;
}

#code-typing.cursor-hidden::after {
    display: none;
}

@keyframes blink {
    from, to { border-color: transparent }
    50% { border-color: var(--accent-color) }
}

@keyframes blink-bg {
    from, to { background-color: transparent }
    50% { background-color: var(--accent-color) }
}

/* Responsive */
@media (max-width: 768px) {
    .container { padding: 0 1.5rem; }
    .hero-title { font-size: 4rem; }
    .hero-desc-container { flex-direction: column; text-align: center; }
    .bullet { display: none; }
    .section { padding: 4rem 0; }
    .skill-card { padding: 2rem; }
}