:root {
    --primary-grey: #1a1a1a;
    --secondary-grey: #2d2d2d;
    --accent-grey: #4a4a4a;
    --text-primary: #f0f0f0;
    --text-secondary: #b0b0b0;
    --accent-blue: #667eea;
    --accent-purple: #764ba2;
    --gradient-primary: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    --card-bg: rgba(255, 255, 255, 0.05);
    --glass-bg: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--primary-grey);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

/* Title Section */
.title-container {
    text-align: center;
    padding: 4rem 1rem;
    animation: fadeInUp 1s ease-out;
}

.main-title {
    font-size: clamp(3.5rem, 10vw, 7rem);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    display: inline-block;
}

.mislign {
    position: relative;
    top: -0.1em;
    left: 0.05em;
    display: inline-block;
    transform: rotate(-1deg);
}

.main-title:hover {
    transform: scale(1.02);
    text-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.subtitle {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    color: var(--text-secondary);
    margin-top: 1rem;
    font-weight: 300;
    letter-spacing: 0.1em;
}

/* Typewriter Effect */
.typewriter {
    border-right: 3px solid var(--accent-blue);
    white-space: nowrap;
    overflow: hidden;
    width: 0;
    animation: typing 3.5s steps(40, end) forwards, blink-caret 0.75s step-end infinite;
    animation-delay: 0.5s;
}

@keyframes typing {
    from { width: 0 }
    to { width: 100% }
}

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

/* Principles Grid */
.principles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 4rem 0;
    padding: 0 1rem;
}

.principle-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-bg);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.principle-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-blue);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.principle-card .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.9;
}

.principle-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.principle-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Buttons */
.cta-section {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin: 3rem 0;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.github-btn {
    background: var(--gradient-primary);
    color: white;
}

.github-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(102, 126, 234, 0.4);
}

.secondary-btn {
    background: transparent;
    border: 2px solid var(--accent-blue);
    color: var(--accent-blue);
}

.secondary-btn:hover {
    background: rgba(102, 126, 234, 0.1);
    transform: translateY(-3px);
}

/* About Section */
.about-section {
    background: var(--secondary-grey);
    border-radius: 30px;
    padding: 3rem;
    margin: 4rem 0;
    display: none;
    animation: fadeIn 0.5s ease;
}

.about-section h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.about-card {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 1.5rem;
    transition: transform 0.3s ease;
}

.about-card:hover {
    transform: translateY(-5px);
}

.about-card h3 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.about-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

.tech-tag {
    background: var(--gradient-primary);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    font-family: 'JetBrains Mono', monospace;
}

/* Footer */
.footer {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--accent-grey);
    margin-top: 4rem;
}

.copyright {
    font-size: 0.9rem;
    margin-top: 0.5rem;
    opacity: 0.7;
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .principles {
        grid-template-columns: 1fr;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-section {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .main-title {
        font-size: 2.5rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
}