/* ===== Variables ===== */
:root {
    /* Couleurs */
    --color-bg-dark: #0F172A;
    --color-bg-surface: #1E293B;
    --color-text-light: #F8FAFC;
    --color-text-muted: #94A3B8;
    --color-primary: #3B82F6;
    --color-primary-hover: #2563EB;
    --color-secondary: #10B981;
    --color-border: #334155;
    
    /* Transitions */
    --transition-normal: all 0.3s ease;
    --transition-slow: all 0.5s ease;
    
    /* Dimensions */
    --header-height: 70px;
    --container-width: 1200px;
    --border-radius: 8px;
}

/* ===== Reset & Base Styles ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--color-bg-dark);
    color: var(--color-text-light);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-normal);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button, input, textarea {
    font-family: inherit;
    font-size: inherit;
    outline: none;
    border: none;
}

/* ===== Container ===== */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== Header ===== */
#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: transparent;
    transition: var(--transition-normal);
    z-index: 1000;
    border-bottom: 1px solid transparent;
}

#header.scrolled {
    background-color: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
}

#header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo a {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
}

.logo-bracket {
    color: var(--color-text-light);
}

.logo-name {
    color: var(--color-primary);
}

.nav-desktop {
    display: none;
}

.nav-desktop ul {
    display: flex;
    gap: 2rem;
}

.nav-desktop a {
    font-size: 0.9rem;
    font-weight: 500;
}

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

.menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    color: var(--color-text-light);
    cursor: pointer;
    transition: var(--transition-normal);
}

.nav-mobile {
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background-color: var(--color-bg-surface);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    z-index: 999;
}

.nav-mobile.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.nav-mobile ul {
    padding: 1rem;
}

.nav-mobile li {
    margin-bottom: 0.75rem;
}

.nav-mobile a {
    display: block;
    padding: 0.5rem 0;
    font-size: 0.9rem;
    font-weight: 500;
}

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

/* ===== Hero Section ===== */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('https://images.unsplash.com/photo-1498050108023-c5249f4df085?ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&ixlib=rb-1.2.1&auto=format&fit=crop&w=2072&q=80');
    background-size: cover;
    background-position: center;
    opacity: 0.2;
    z-index: -1;
}

.hero-content {
    max-width: 650px;
    z-index: 1;
}

.hero .subtitle {
    font-family: 'Roboto Mono', monospace;
    color: var(--color-primary);
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.hero h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero .description {
    font-size: 1.125rem;
    color: var(--color-text-light);
    opacity: 0.9;
    margin-bottom: 2rem;
}

.cta-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
}

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

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

.btn-outline {
    border: 1px solid var(--color-border);
    color: var(--color-text-light);
}

.btn-outline:hover {
    border-color: var(--color-primary);
}

.btn i {
    margin-left: 0.5rem;
}

.btn-full {
    width: 100%;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-indicator::after {
    content: '';
    display: block;
    width: 12px;
    height: 12px;
    border-right: 2px solid white;
    border-bottom: 2px solid white;
    transform: rotate(45deg);
    animation: scrollIndicate 2s infinite;
}

@keyframes scrollIndicate {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) rotate(45deg);
    }
    40% {
        transform: translateY(-10px) rotate(45deg);
    }
    60% {
        transform: translateY(-5px) rotate(45deg);
    }
}

/* ===== Sections Common Styles ===== */
.section {
    padding: 5rem 0;
}

.bg-alt {
    background-color: var(--color-bg-surface);
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 4rem;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--color-text-muted);
}

/* ===== Skills Section ===== */
.skills-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

.skills-column h3 {
    display: flex;
    align-items: center;
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}

.skills-column h3 i {
    margin-right: 0.75rem;
    color: var(--color-primary);
}

/* Technical Skills */
.technical-skills {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.skill-item {
    width: 100%;
}

.skill-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.skill-bar {
    width: 100%;
    height: 8px;
    background-color: #2D3748;
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background-color: var(--color-primary);
    border-radius: 4px;
    width: 0;
    transition: width 1.5s ease-out;
}

/* Soft Skills */
.soft-skills {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.soft-skill-card {
    background-color: var(--color-bg-dark);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    transition: var(--transition-normal);
}

.soft-skill-card:hover {
    transform: translateY(-5px);
}

.soft-skill-card .icon {
    color: var(--color-secondary);
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.soft-skill-card h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.soft-skill-card p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ===== Education Section ===== */
.education-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.education-card {
    background-color: var(--color-bg-dark);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 2rem;
    transition: var(--transition-normal);
}

.education-card:hover {
    border-color: var(--color-primary);
}

.education-card .icon {
    color: var(--color-primary);
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.education-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.education-card .institution {
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.education-card .date {
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.education-card .description {
    color: var(--color-text-light);
    opacity: 0.9;
}

/* ===== Experience Section ===== */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 2rem;
}

.timeline-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 2px;
    background-color: var(--color-border);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -2.45rem;
    top: 0;
    width: 16px;
    height: 16px;
    background-color: var(--color-primary);
    border-radius: 50%;
}

.timeline-content {
    background-color: var(--color-bg-dark);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 1.5rem;
}

.timeline-content .date {
    display: inline-block;
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--color-primary);
    font-size: 0.875rem;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    margin-bottom: 1rem;
}

.timeline-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.timeline-content .company {
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: 1rem;
}

.timeline-content .duties {
    margin-top: 1rem;
}

.timeline-content .duties li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.timeline-content .duties li:last-child {
    margin-bottom: 0;
}

.timeline-content .duties i {
    color: var(--color-secondary);
    margin-right: 0.75rem;
    margin-top: 0.25rem;
    flex-shrink: 0;
}

/* ===== Projects Section ===== */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.project-card {
    background-color: var(--color-bg-dark);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition-normal);
}

.project-image {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: var(--transition-normal);
}

.project-overlay span {
    color: var(--color-text-light);
    font-size: 0.9rem;
    font-weight: 500;
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-info {
    padding: 1.5rem;
}

.project-info h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

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

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

.project-tags span {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--color-primary);
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
}

.project-links {
    display: flex;
    gap: 1rem;
}

.project-link {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
}

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

.project-link i {
    margin-right: 0.375rem;
}

/* ===== About Section ===== */
.about-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

.about-image {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

.about-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.about-text {
    margin-bottom: 2rem;
}

.about-text p {
    margin-bottom: 1rem;
}

.about-text p:last-child {
    margin-bottom: 0;
}

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

.about-list h4 {
    font-size: 1.125rem;
    margin-bottom: 1rem;
}

.about-list ul li {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
}

.about-list ul li i {
    color: var(--color-primary);
    margin-right: 0.75rem;
}

.link-arrow {
    display: inline-flex;
    align-items: center;
    color: var(--color-primary);
    font-weight: 500;
    transition: var(--transition-normal);
}

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

.link-arrow i {
    margin-left: 0.5rem;
    transition: var(--transition-normal);
}

.link-arrow:hover i {
    transform: translateX(5px);
}

/* ===== Contact Section ===== */
.contact-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

.contact-form h3, 
.contact-info h3 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--color-bg-dark);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    color: var(--color-text-light);
    transition: var(--transition-normal);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
}

.form-group textarea {
    resize: none;
}

.error-message {
    color: #EF4444;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: none;
}

.error-message.active {
    display: block;
}

.info-items {
    margin-bottom: 2.5rem;
}

.info-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.info-item:last-child {
    margin-bottom: 0;
}

.info-icon {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--color-primary);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
    flex-shrink: 0;
}

.info-content h4 {
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.info-content a {
    color: var(--color-text-muted);
}

.info-content a:hover {
    color: var(--color-primary);
}

.social-follow h3 {
    margin-bottom: 1.25rem;
}

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

.social-link {
    background-color: var(--color-bg-dark);
    color: var(--color-primary);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-normal);
}

.social-link:hover {
    background-color: var(--color-bg-dark);
    transform: translateY(-5px);
}

/* ===== Footer ===== */
#footer {
    background-color: var(--color-bg-surface);
    padding: 3rem 0;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: 2rem;
}

.footer-logo {
    margin-bottom: 1.5rem;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.footer-links a {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

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

.footer-copyright {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* ===== Media Queries ===== */
@media (min-width: 640px) {
    .hero h1 {
        font-size: 3rem;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
    
    .soft-skills {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-lists {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) {
    .nav-desktop {
        display: block;
    }
    
    .menu-toggle {
        display: none;
    }
    
    .hero h1 {
        font-size: 3.5rem;
    }
    
    .hero h2 {
        font-size: 2.25rem;
    }
    
    .education-container {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
        margin-bottom: 0;
    }
    
    .footer-logo, .footer-links {
        margin-bottom: 0;
    }
}

@media (min-width: 1024px) {
    .skills-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-container {
        grid-template-columns: 1fr 1.5fr;
    }
    
    .projects-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}