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

:root {
    /* Peaceful color palette - soft blues and greens */
    --primary-color: #6B9BD1;
    --primary-dark: #4A7BA7;
    --secondary-color: #7FB3A3;
    --accent-color: #A8D5BA;
    --background: #F5F9FC;
    --surface: #FFFFFF;
    --text-primary: #2C3E50;
    --text-secondary: #5A6C7D;
    --border-color: #E1E8ED;
    --shadow: rgba(107, 157, 209, 0.1);
    --shadow-hover: rgba(107, 157, 209, 0.2);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header and Navigation */
header {
    background-color: var(--surface);
    box-shadow: 0 2px 10px var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.logo a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

.logo a:hover {
    color: var(--primary-dark);
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

/* Main Content */
main {
    flex: 1;
    padding: 2rem 0;
}

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

/* Hero Section */
.hero {
    text-align: center;
    padding: 4rem 0;
    background: linear-gradient(135deg, rgba(107, 157, 209, 0.05) 0%, rgba(127, 179, 163, 0.05) 100%);
    margin-bottom: 3rem;
}

.hero h2 {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* Projects Section */
.section-title {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 2rem;
    text-align: center;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.project-card {
    background: var(--surface);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-color);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px var(--shadow-hover);
}

.project-card h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tag {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.project-link {
    display: inline-block;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease, transform 0.3s ease;
}

.project-link:hover {
    color: var(--primary-dark);
    transform: translateX(5px);
}

/* Project Detail Page */
.back-link {
    display: inline-block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 2rem;
    transition: color 0.3s ease;
    font-weight: 500;
}

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

.project-content {
    background: var(--surface);
    border-radius: 12px;
    padding: 3rem;
    box-shadow: 0 4px 6px var(--shadow);
    border: 1px solid var(--border-color);
    max-width: 900px;
    margin: 0 auto;
}

.project-content h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.project-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-color);
}

.github-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease, transform 0.3s ease;
    padding: 0.5rem 1rem;
    border: 2px solid var(--primary-color);
    border-radius: 8px;
}

.github-link:hover {
    color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
}

.github-link svg {
    width: 20px;
    height: 20px;
}

.project-content h2 {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.project-description-full,
.project-use-case,
.project-features,
.project-tech,
.project-installation,
.project-license {
    margin-bottom: 2rem;
}

.project-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.project-content ul {
    margin-left: 2rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.project-content li {
    margin-bottom: 0.5rem;
    line-height: 1.7;
}

.project-content code {
    background: var(--background);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: var(--primary-dark);
    border: 1px solid var(--border-color);
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1rem;
}

.tech-tag {
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: 0 2px 4px var(--shadow);
}

/* Contact Form */
.contact-section {
    max-width: 700px;
    margin: 0 auto;
    padding: 2rem 0;
}

.contact-section h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 1rem;
}

.contact-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

.contact-form {
    background: var(--surface);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    background: var(--surface);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(107, 157, 209, 0.1);
}

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

.submit-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.875rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    width: 100%;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px var(--shadow-hover);
}

.submit-btn:active {
    transform: translateY(0);
}

.form-message {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    display: none;
}

.form-message.success {
    background: var(--accent-color);
    color: #2d5a3d;
    display: block;
}

.form-message.error {
    background: #ffebee;
    color: #c62828;
    display: block;
}

/* Footer */
footer {
    background: var(--surface);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 3rem;
    text-align: center;
    color: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        gap: 1.5rem;
    }

    .hero h2 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

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

    .project-content {
        padding: 2rem 1.5rem;
    }

    .project-content h1 {
        font-size: 2rem;
    }

    .contact-form {
        padding: 1.5rem;
    }
}