/* Base styles */
:root {
    --main-bg-color: #fcfcfc;
    --text-color: #333;
    --accent-color: #6b7280;
    --border-color: #e5e7eb;
    --link-color: #4b6bfb;
    --hover-color: #3b5bdb;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--main-bg-color);
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

a {
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    text-decoration: underline;
    color: var(--hover-color);
}

/* Header */
header {
    margin-bottom: 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo {
    font-weight: bold;
    font-size: 1.5rem;
    padding: 0.5rem;
    border: 2px solid var(--text-color);
    border-radius: 4px;
    line-height: 1;
}

.nav {
    display: flex;
    gap: 1.5rem;
    margin-top: 1rem;
}

.nav a {
    color: var(--text-color);
    font-size: 0.9rem;
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--link-color);
    transition: width 0.3s ease;
}

.nav a:hover::after {
    width: 100%;
}

/* Intro section */
.intro {
    margin-bottom: 4rem;
}

.intro h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.intro p {
    color: var(--accent-color);
    max-width: 36rem;
}

/* Projects section */
.section-heading {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
    position: relative;
    display: inline-block;
}

.section-heading::after {
    content: '';
    position: absolute;
    width: 30px;
    height: 3px;
    background-color: var(--link-color);
    bottom: -6px;
    left: 0;
}

.projects {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 4rem;
}

.project {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.project:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.project-img {
    width: 100%;
    height: 200px;
    background-color: #f3f4f6;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color);
    font-size: 0.9rem;
    font-style: italic;
}

.project-img img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
}

.project-content {
    padding: 1.5rem;
}

.project-title {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.project-desc {
    color: var(--accent-color);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tag {
    background-color: #f3f4f6;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    color: var(--accent-color);
}

.project-link {
    font-size: 0.9rem;
    display: inline-block;
    font-weight: 500;
}

/* Contact section */
.contact {
    margin-bottom: 4rem;
}

.contact p {
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

.contact-form {
    max-width: 500px;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--main-bg-color);
    color: var(--text-color);
    font-family: inherit;
    font-size: 0.95rem;
}

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

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--link-color);
}

.submit-btn {
    background-color: var(--link-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-size: 0.95rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.submit-btn:hover {
    background-color: var(--hover-color);
}

.submit-btn:disabled {
    background-color: var(--accent-color);
    cursor: not-allowed;
}

.form-message {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 4px;
    font-size: 0.9rem;
    display: none;
}

.form-message.success {
    background-color: #dcfce7;
    color: #166534;
    display: block;
}

.form-message.error {
    background-color: #fee2e2;
    color: #991b1b;
    display: block;
}

/* Dark mode for form messages */
@media (prefers-color-scheme: dark) {
    .form-message.success {
        background-color: #064e3b;
        color: #dcfce7;
    }

    .form-message.error {
        background-color: #7f1d1d;
        color: #fee2e2;
    }
}

/* Footer */
footer {
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--accent-color);
    font-size: 0.9rem;
}

/* Responsive */
@media (min-width: 640px) {
    .projects {
        grid-template-columns: repeat(2, 1fr);
    }
    
    header {
        flex-wrap: nowrap;
    }
    
    .nav {
        margin-top: 0;
    }
}

@media (max-width: 480px) {
    .intro h1 {
        font-size: 1.6rem;
    }
    
    body {
        padding: 1.5rem 1rem;
    }
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
    :root {
        --main-bg-color: #121212;
        --text-color: #e0e0e0;
        --accent-color: #a0a0a0;
        --border-color: #2a2a2a;
        --link-color: #7b96ff;
        --hover-color: #96adff;
    }
    
    .tag {
        background-color: #2a2a2a;
    }
    
    .project-img {
        background-color: #1a1a1a;
    }
    
    .project {
        box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    }
    
    .project:hover {
        box-shadow: 0 4px 8px rgba(0,0,0,0.3);
    }
}