/* Variables for theming */
:root {
    /* Light theme (default) */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --text-primary: #333333;
    --text-secondary: #666666;
    --accent: #3498db;
    --border: #e0e0e0;
    --card-bg: #ffffff;
    --shadow: rgba(0, 0, 0, 0.1);
    --header-bg: #333333;
    --header-text: #ffffff;
}

[data-theme="dark"] {
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --text-primary: #f0f0f0;
    --text-secondary: #b0b0b0;
    --accent: #4dabf7;
    --border: #444444;
    --card-bg: #2a2a2a;
    --shadow: rgba(0, 0, 0, 0.3);
    --header-bg: #1a1a1a;
    --header-text: #f0f0f0;
}

/* Global styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 60px 0;
}

h1, h2, h3 {
    margin-bottom: 20px;
    line-height: 1.2;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Navigation */
header {
    background-color: var(--header-bg);
    color: var(--header-text);
    padding: 15px 20px;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px var(--shadow);
}

header h1 {
    margin: 0;
    flex: 1;
    font-size: 1.5rem;
}

header nav {
    display: flex;
    align-items: center;
}

header nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

header nav ul li {
    margin: 0 15px;
}

header nav ul li a {
    color: var(--header-text);
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.2s;
}

header nav ul li a:hover {
    opacity: 0.8;
    text-decoration: none;
}

/* Theme toggle */
.theme-toggle {
    margin-left: 20px;
}

#theme-toggle-btn {
    background: transparent;
    border: none;
    color: var(--header-text);
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5px;
}

#theme-toggle-btn:hover {
    opacity: 0.8;
}

.fa-moon {
    display: inline;
}

.fa-sun {
    display: none;
}

[data-theme="dark"] .fa-moon {
    display: none;
}

[data-theme="dark"] .fa-sun {
    display: inline;
}

/* About Section */
#about {
    background-color: var(--bg-secondary);
    padding: 60px 0;
}

#about h2 {
    color: var(--text-primary);
    margin-bottom: 20px;
}

#about .container {
    display: flex;
    align-items: center;
    max-width: 1000px;
}

#about p {
    color: var(--text-secondary);
    margin-bottom: 0;
    flex: 1;
    font-size: 1.05rem;
}

#about img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 40px;
    box-shadow: 0 4px 10px var(--shadow);
}

.about-me-text {
    flex: 1;
}

/* Works Section */
#works {
    padding: 60px 0;
    background-color: var(--bg-primary);
}

#works h2 {
    text-align: center;
    margin-bottom: 40px;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.project-card {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 25px;
    box-shadow: 0 4px 10px var(--shadow);
    border: 1px solid var(--border);
}

.project-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.project-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    margin-bottom: 20px;
    gap: 8px;
}

.project-tech span {
    background-color: var(--bg-secondary);
    border-radius: 20px;
    padding: 5px 12px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.project-links {
    display: flex;
    gap: 15px;
}

.project-links a {
    font-weight: 500;
}

/* See More Button */
.see-more-container {
    text-align: center;
    margin-top: 40px;
}

.see-more-btn {
    background-color: var(--accent);
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 4px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
    font-size: 1rem;
}

.see-more-btn:hover {
    opacity: 0.9;
}

.see-more-btn:disabled {
    background-color: var(--text-secondary);
    cursor: not-allowed;
    opacity: 0.7;
}

/* GitHub Projects Loading States */
.loading {
    grid-column: 1 / -1;
    text-align: center;
    padding: 30px;
    font-style: italic;
    color: var(--text-secondary);
}

.error-message {
    grid-column: 1 / -1;
    text-align: center;
    padding: 30px;
    color: #e74c3c;
    background-color: var(--card-bg);
    border-radius: 8px;
    border: 1px solid var(--border);
}

/* Animation for loading state */
@keyframes pulse {
    0% { opacity: 0.6; }
    50% { opacity: 1; }
    100% { opacity: 0.6; }
}

.loading {
    animation: pulse 1.5s infinite ease-in-out;
}

/* Contact Section */
#contact {
    background-color: var(--bg-secondary);
    padding: 60px 0;
}

#contact h2 {
    text-align: center;
    margin-bottom: 40px;
}

.contact-info {
    max-width: 600px;
    margin: 0 auto 40px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.contact-item i {
    font-size: 1.2rem;
    color: var(--accent);
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

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

button[type="submit"] {
    background-color: var(--accent);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 4px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
}

button[type="submit"]:hover {
    opacity: 0.9;
}

/* Contact message styles */
.contact-message {
    display: none;
    padding: 12px 15px;
    margin-bottom: 20px;
    border-radius: 4px;
    font-weight: 500;
    transition: opacity 0.3s ease;
}

.contact-message-success {
    background-color: rgba(39, 174, 96, 0.1);
    color: #27ae60;
    border-left: 4px solid #27ae60;
}

.contact-message-error {
    background-color: rgba(231, 76, 60, 0.1);
    color: #e74c3c;
    border-left: 4px solid #e74c3c;
}

.contact-message-info {
    background-color: rgba(52, 152, 219, 0.1);
    color: var(--accent);
    border-left: 4px solid var(--accent);
}

/* Footer */
footer {
    background-color: var(--header-bg);
    color: var(--header-text);
    padding: 30px 0;
    text-align: center;
}

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

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    color: var(--header-text);
    font-size: 1.3rem;
}

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

/* Media Queries */
@media screen and (max-width: 768px) {
    #about .container {
        flex-direction: column;
        text-align: center;
    }

    #about img {
        margin: 0 auto 30px;
    }
    
    footer .container {
        flex-direction: column;
        gap: 15px;
    }
}

@media screen and (max-width: 600px) {
    header {
        flex-direction: column;
        padding: 15px;
    }
    
    header h1 {
        margin-bottom: 15px;
    }
    
    header nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    header nav ul li {
        margin: 5px 10px;
    }
    
    .theme-toggle {
        position: absolute;
        top: 15px;
        right: 15px;
        margin: 0;
    }
    
    .project-grid {
        grid-template-columns: 1fr;
    }
}