/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0066ff;
    --primary-hover: #0052cc;
    --secondary-color: #6b7280;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --border-color: #e5e7eb;
    --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);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 16px 0;
}

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

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
}

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

/* Hero Section */
.hero {
    margin-top: 80px;
    padding: 120px 0;
    background: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%);
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 64px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -1.5px;
    color: var(--text-primary);
}

.hero-description {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-family: inherit;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background-color: var(--bg-secondary);
}

/* Section Styles */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -1px;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Projects Section */
.projects {
    background-color: var(--bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.project-card {
    background: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.project-card.placeholder {
    opacity: 0.7;
}

.project-icon {
    font-size: 48px;
    margin-bottom: 24px;
}

.project-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

.project-link {
    display: inline-block;
    margin-top: 16px;
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.project-link:hover {
    color: var(--primary-hover);
}

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

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-description {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.feature-item {
    text-align: center;
    padding: 32px;
    background: var(--bg-secondary);
    border-radius: 12px;
}

.feature-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.feature-item h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.feature-item p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* Contact Section */
.contact {
    background-color: var(--bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    font-size: 32px;
    flex-shrink: 0;
}

.contact-details h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.contact-details a {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 16px;
    transition: var(--transition);
}

.contact-details a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

/* Contact Form */
.contact-form {
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 14px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    transition: var(--transition);
    background-color: var(--bg-primary);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    background-color: var(--text-primary);
    color: white;
    padding: 64px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 15px;
}

.footer-column h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 12px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 15px;
    transition: var(--transition);
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 40px;
    }

    .hero-description {
        font-size: 18px;
    }

    .section-title {
        font-size: 36px;
    }

    .nav-links {
        gap: 20px;
    }

    .nav-links a {
        font-size: 14px;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

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

    .about-features {
        grid-template-columns: 1fr;
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        padding: 80px 0;
    }

    section {
        padding: 60px 0;
    }

    .project-card {
        padding: 32px 24px;
    }

    .contact-form {
        padding: 32px 24px;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.project-card {
    animation: fadeIn 0.6s ease-out;
}