:root {
    --color-bg-dark: #0A0A0E;
    --color-accent-blue: #00E0FF;
    --color-accent-green: #00FFC0;
    --color-text-light: #E0E0E0;
    --color-text-medium: #A0A0A0;
    --color-border: #2A2A3A;
    --font-primary: 'Inter', sans-serif;
    --font-secondary: 'Fira Code', monospace;
}

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

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--color-text-light);
    background-color: var(--color-bg-dark);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* Buttons */
.btn-primary {
    display: inline-block;
    background-color: var(--color-accent-blue);
    color: var(--color-bg-dark);
    padding: 0.8rem 1.8rem;
    border-radius: 5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.btn-primary:hover {
    background-color: var(--color-accent-green);
    transform: translateY(-2px);
}

.btn-secondary {
    display: inline-block;
    border: 1px solid var(--color-accent-blue);
    color: var(--color-accent-blue);
    padding: 0.6rem 1.2rem;
    border-radius: 5px;
    font-size: 0.9rem;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.btn-secondary:hover {
    background-color: var(--color-accent-blue);
    color: var(--color-bg-dark);
}

.btn-all-projects {
    display: block;
    width: fit-content;
    margin: 3rem auto 0 auto;
    border: 2px solid var(--color-accent-green);
    color: var(--color-accent-green);
    padding: 1rem 2.5rem;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 700;
    text-transform: uppercase;
    transition: background-color 0.3s ease, color 0.3s ease, transform 0.2s ease;
}

.btn-all-projects:hover {
    background-color: var(--color-accent-green);
    color: var(--color-bg-dark);
    transform: translateY(-3px);
}

/* Header - Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, #1A1A2A 100%);
    padding: 6rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--color-border);
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top left, rgba(0, 224, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at bottom right, rgba(0, 255, 192, 0.1) 0%, transparent 50%);
    pointer-events: none;
    opacity: 0.7;
}

.hero-section h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    letter-spacing: -1px;
    color: var(--color-accent-blue);
}

.hero-section .tagline {
    font-size: 1.5rem;
    color: var(--color-text-medium);
    margin-bottom: 2.5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Sections */
section {
    padding: 4rem 0;
    border-bottom: 1px solid var(--color-border);
}

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

h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--color-accent-green);
    position: relative;
}

h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--color-accent-green);
    margin: 1rem auto 0 auto;
    border-radius: 2px;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.5rem;
    justify-items: center;
}

.skill-item {
    background-color: #1A1A2A;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    font-size: 1.1rem;
    font-family: var(--font-secondary);
    color: var(--color-accent-blue);
    box-shadow: 0 4px 15px rgba(0, 224, 255, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.skill-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 224, 255, 0.2);
}

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

.project-card {
    background-color: #1A1A2A;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
    transform: translateY(-7px);
    box-shadow: 0 8px 30px rgba(0, 255, 192, 0.2);
}

.project-card h3 {
    color: var(--color-accent-blue);
    font-size: 1.8rem;
    margin-bottom: 0.8rem;
}

.project-card p {
    color: var(--color-text-medium);
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

/* Footer */
.footer-section {
    padding: 2.5rem 0;
    text-align: center;
    font-size: 0.9rem;
    color: var(--color-text-medium);
}

.footer-section .social-links {
    margin-top: 1rem;
}

.footer-section .social-links a {
    margin: 0 10px;
    color: var(--color-text-medium);
    transition: color 0.3s ease;
}

.footer-section .social-links a:hover {
    color: var(--color-accent-blue);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 2.5rem;
    }

    .hero-section .tagline {
        font-size: 1.2rem;
    }

    h2 {
        font-size: 2rem;
    }

    .skills-grid, .projects-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 1rem;
    }

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

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

    .hero-section .tagline {
        font-size: 1rem;
    }

    .btn-primary {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }

    h2 {
        font-size: 1.8rem;
        margin-bottom: 2rem;
    }

    .skill-item, .project-card {
        padding: 1rem;
        font-size: 1rem;
    }

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

    .btn-all-projects {
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
    }
}