/* ===== Variables ===== */
:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #151515;
    --bg-tertiary: #1f1f1f;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent: #ff5722;
    --accent-hover: #ff7043;
    --accent-dark: #d84315;
    --border-color: #2a2a2a;
    --shadow: rgba(0, 0, 0, 0.5);
    --transition: all 0.3s ease;
}

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

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

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

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

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

.nav-logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent);
    letter-spacing: 2px;
}

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

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: var(--transition);
}

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

.nav-link:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    position: relative;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    z-index: 1;
}

.hero-content {
    max-width: 800px;
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.highlight {
    color: var(--accent);
    position: relative;
    display: inline-block;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 1rem;
    font-weight: 600;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.btn {
    padding: 0.8rem 2rem;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid var(--accent);
}

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

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 87, 34, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--accent);
}

.btn-secondary:hover {
    background-color: var(--accent);
    color: white;
    transform: translateY(-2px);
}

.social-links {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    font-size: 1.5rem;
}

.social-links a {
    color: var(--text-primary);
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--accent);
    transform: scale(1.2);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-indicator span {
    display: block;
    width: 20px;
    height: 30px;
    border: 2px solid var(--accent);
    border-radius: 15px;
    position: relative;
}

.scroll-indicator span::before {
    content: '';
    position: absolute;
    top: 5px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background-color: var(--accent);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0%, 100% {
        top: 5px;
        opacity: 1;
    }
    50% {
        top: 15px;
        opacity: 0.5;
    }
}

/* ===== Sections ===== */
.section {
    padding: 5rem 2rem;
    position: relative;
    z-index: 2;
    background-color: var(--bg-primary);
}

.section-alt {
    background-color: var(--bg-secondary);
    position: relative;
    z-index: 2;
}

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

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
    width: 100%;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

/* ===== About Section ===== */
.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.about-text strong {
    color: var(--accent);
}

/* ===== Skills Section ===== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.skill-card {
    background-color: var(--bg-tertiary);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.skill-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px var(--shadow);
    border-color: var(--accent);
}

.skill-icon {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.skill-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.skill-card p {
    color: var(--text-secondary);
}

/* ===== Projects Section ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card {
    background-color: var(--bg-tertiary);
    padding: 2rem;
    border-radius: 10px;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px var(--shadow);
    border-color: var(--accent);
}

.project-header {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.project-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.project-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

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

.tag {
    background-color: var(--accent);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* ===== Timeline (Experience) ===== */
.timeline {
    position: relative;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background-color: var(--accent);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    width: calc(50% - 2rem);
}

.timeline-item:nth-child(odd) {
    margin-left: 0;
    text-align: right;
}

.timeline-item:nth-child(even) {
    margin-left: calc(50% + 2rem);
}

.timeline-marker {
    position: absolute;
    top: 0;
    width: 20px;
    height: 20px;
    background-color: var(--accent);
    border: 3px solid var(--bg-primary);
    border-radius: 50%;
    box-shadow: 0 0 0 3px var(--accent);
}

.timeline-item:nth-child(odd) .timeline-marker {
    right: -2.9rem;
}

.timeline-item:nth-child(even) .timeline-marker {
    left: -2.9rem;
}

.timeline-content {
    background-color: var(--bg-tertiary);
    padding: 1.5rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.timeline-content:hover {
    border-color: var(--accent);
    box-shadow: 0 5px 20px var(--shadow);
}

.timeline-date {
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.timeline-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.timeline-content h4 {
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 1rem;
}

.timeline-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== Education Section ===== */
.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.education-card {
    background-color: var(--bg-tertiary);
    padding: 2rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    display: flex;
    gap: 1.5rem;
}

.education-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 10px 30px var(--shadow);
}

.education-icon {
    font-size: 3rem;
    color: var(--accent);
    flex-shrink: 0;
}

.education-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.education-content h4 {
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.education-date {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.education-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== Veille Section ===== */
.veille-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.veille-card {
    background-color: var(--bg-tertiary);
    padding: 2rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.veille-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent);
    box-shadow: 0 10px 30px var(--shadow);
}

.veille-icon {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.veille-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.veille-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    flex-grow: 1;
}

.veille-card .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    align-self: flex-start;
}

.veille-card .btn i {
    transition: var(--transition);
}

.veille-card:hover .btn i {
    transform: translateX(5px);
}

/* ===== Contact Section ===== */
.contact-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.contact-intro {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.contact-card {
    background-color: var(--bg-tertiary);
    padding: 2rem;
    border-radius: 10px;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.contact-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent);
    box-shadow: 0 10px 30px var(--shadow);
}

.contact-card i {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.contact-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.contact-card p {
    color: var(--text-secondary);
}

/* ===== Footer ===== */
.footer {
    background-color: var(--bg-secondary);
    padding: 2rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer p {
    color: var(--text-secondary);
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-secondary);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: 0 10px 27px var(--shadow);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

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

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .timeline::before {
        left: 0;
    }

    .timeline-item {
        width: 100%;
        margin-left: 2rem !important;
        text-align: left !important;
    }

    .timeline-item:nth-child(odd) .timeline-marker,
    .timeline-item:nth-child(even) .timeline-marker {
        left: -2.9rem;
        right: auto;
    }

    .skills-grid,
    .projects-grid,
    .education-grid,
    .veille-content {
        grid-template-columns: 1fr;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 1rem;
    }

    .section {
        padding: 3rem 1rem;
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .contact-methods {
        grid-template-columns: 1fr;
    }
}