:root {
    /* Light mode variables */
    --bg-primary: #ffffff;
    --bg-secondary: #777777;
    --text-primary: #000000;
    --text-secondary: #484848;
    --accent-color: #777777;
    --accent-hover: #004b9d;
    --card-bg: #ffffff;
    --card-shadow: rgba(0, 0, 0, 45%);
    --tag-bg: #e3e3e3;
    --tag-selected: #007bff;
    --tag-color: #000000;
    --border-color: #ababab;
}

[data-theme="dark"] {
    /* Dark mode variables */
    --bg-primary: #101010;
    --bg-secondary: #060606;
    --text-primary: #ffffff;
    --text-secondary: #a5a5a5;
    --accent-color: #3b3b3b;
    --accent-hover: #ab3300;
    --card-bg: #060606;
    --card-shadow: rgba(0, 0, 0, 45%);
    --tag-bg: #3b3b3b;
    --tag-selected: #ff4d00;
    --tag-color: #ffffff;
    --border-color: #777777;
}

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

body {
    min-width: fit-content;
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Navbar styles */
.navbar {
    background-color: var(--bg-primary);
    box-shadow: 0 2px 4px var(--card-shadow);
    padding: 1rem 2rem;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

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

.nav-brand a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: bold;
}

.burger-menu {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: color 0.3s ease;
}

.burger-menu:hover {
    color: var(--accent-color);
}

.nav-links-container {
    display: flex;
    align-items: center;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
    margin: 0;
    padding: 0;
    align-items: center;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Theme toggle button */
.theme-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    transition: color 0.3s ease;
}

.theme-toggle:hover {
    color: var(--accent-color);
}

/* Main content styles */
main {
    margin-top: 70px;
}

.hero {
    text-align: center;
    padding: 6rem 2rem;
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)),
                url('/ressources/images/banner.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    margin-bottom: 2rem;
    color: white;
    position: relative;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero p {
    font-size: 1.5rem;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
    opacity: 0.9;
}

/* Portfolio container styles */
.portfolio-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: flex-start;
}

.project-card {
    flex: 0 1 calc(33.333% - 2rem);
    min-width: 300px;
    background: var(--card-bg);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px var(--card-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.project-link {
    text-decoration: none;
    color: inherit;
    flex: 1;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px var(--card-shadow);
}

.project-thumbnail {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.project-thumbnail img,
.project-thumbnail video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-content {
    padding: 1.5rem;
    padding-bottom: 0.5rem;
}

.project-content h3 {
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.project-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

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

.tag {
    background: var(--tag-bg);
    padding: 0.25rem 0.75rem;
    border-radius: 10px;
    font-size: 0.8rem;
    color: var(--tag-color);
}

.project-card-date {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-align: center;
    padding-bottom: 0.8rem;
    margin-top: auto;
}

.view-project {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--accent-color);
    color: white;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s ease;
    margin: 0 1.5rem 1rem 1.5rem;
    text-align: center;
}

.view-project:hover {
    background: var(--accent-hover);
}

#sentinel {
    width: 100%;
    height: 20px;
    flex-basis: 100%;
}

/* Contact form styles */
.contact-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 2rem;
}

.contact-container h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.platform-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.5rem;
    background: var(--accent-color);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 10px;
    transition: transform 0.3s ease, background-color 0.3s ease;
    text-align: center;
}

.platform-link:hover {
    transform: translateY(-5px);
    background: var(--accent-hover);
    color: white;
}

.platform-link i {
    font-size: 2rem;
}

.platform-link span {
    font-size: 1rem;
    font-weight: 500;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.5rem;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.form-group textarea {
    height: 150px;
    resize: vertical;
}

button[type="submit"] {
    background-color: var(--accent-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button[type="submit"]:hover {
    background-color: var(--accent-hover);
}

/* Footer styles */
.footer {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    padding: 2rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Responsive design */
@media (max-width: 1200px) {
    .project-card {
        flex: 0 1 calc(50% - 2rem);
    }
}

.close-sidebar {
    display: none;
}

@media (max-width: 768px) {
    .project-card {
        flex: 0 1 100%;
    }
    
    .burger-menu {
        display: block;
    }

    .nav-links-container {
        position: fixed;
        top: 0;
        right: -100%;
        width: 250px;
        height: 100%;
        background-color: var(--bg-primary);
        box-shadow: -2px 0 4px var(--card-shadow);
        transition: right 0.3s ease;
        padding: 1rem 2rem;
        display: flex;
        flex-direction: column;
    }

    .nav-links-container.active {
        right: 0;
    }

    .close-sidebar {
        display: block;
        background: none;
        border: none;
        color: var(--text-primary);
        font-size: 1.5rem;
        cursor: pointer;
        padding: 8px 11px;
        transition: color 0.3s ease;
        align-self: flex-end;
        margin-bottom: 2rem;
    }

    .close-sidebar:hover {
        color: var(--accent-color);
    }

    .nav-links {
        flex-direction: column;
        align-items: center;
        gap: 2rem;
        width: 100%;
    }

    .nav-links li {
        width: 100%;
        text-align: center;
    }

    .nav-links a {
        display: block;
        padding: 0.5rem;
        width: 100%;
        font-size: 1.2rem;
    }

    .nav-links .theme-toggle {
        margin: 0 auto;
        font-size: 1.4rem;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .hero {
        padding: 4rem 1rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1.2rem;
    }
}

/* Filter styles */
.filter-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

.filter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.filter-header h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.clear-filters {
    padding: 0.5rem 1rem;
    background: var(--tag-bg);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    color: var(--text-primary);
}

.clear-filters:hover {
    background: var(--border-color);
}

.tag-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.filter-tag {
    padding: 0.5rem 1rem;
    background: var(--tag-bg);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    color: var(--tag-color);
}

.filter-tag:hover {
    background: var(--accent-hover);
    color: white;
}

.filter-tag.active {
    background: var(--tag-selected);
    color: white;
}