:root {
    /* Colors */
    --primary: hsl(220, 90%, 56%);
    --primary-light: hsl(220, 90%, 65%);
    --primary-dark: hsl(220, 90%, 45%);
    --secondary: hsl(280, 85%, 60%);
    --secondary-light: hsl(280, 85%, 70%);
    --accent: hsl(340, 82%, 52%);
    --accent-light: hsl(340, 82%, 62%);

    --bg-dark: hsl(220, 20%, 10%);
    --bg-darker: hsl(220, 20%, 8%);
    --bg-card: hsl(220, 20%, 15%);
    --bg-card-hover: hsl(220, 20%, 18%);

    --text-primary: hsl(0, 0%, 95%);
    --text-secondary: hsl(0, 0%, 70%);
    --text-muted: hsl(0, 0%, 50%);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary), var(--secondary));
    --gradient-accent: linear-gradient(135deg, var(--accent), var(--primary));
    --gradient-bg: linear-gradient(180deg, var(--bg-darker) 0%, var(--bg-dark) 100%);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.4);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Fonts */
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-body);
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Particles Background */
#particles-js {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: var(--gradient-bg);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(15, 18, 26, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(15, 18, 26, 0.95);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    position: relative;
}

.nav-link span {
    /* Ensure text is visible */
    opacity: 1;
    color: inherit;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 80%;
    height: 2px;
    background: var(--gradient-primary);
    transition: transform var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

.nav-link:hover::before,
.nav-link.active::before {
    transform: translateX(-50%) scaleX(1);
}

.nav-link i {
    font-size: 1.1rem;
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: var(--transition-normal);
    border-radius: 2px;
}

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

.section {
    min-height: 100vh;
    padding: var(--spacing-xl) var(--spacing-md);
    display: block;
    scroll-margin-top: 80px;
}

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

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.title-underline {
    width: 100px;
    height: 4px;
    background: var(--gradient-primary);
    margin: 1rem auto;
    border-radius: 2px;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
    margin-top: 1rem;
}

/* HOME SECTION */
.section-home {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.hero-container {
    width: 100%;
    max-width: 1200px;
}

.hero-content {
    text-align: center;
}

.hero-title {
    margin-bottom: 2rem;
}

.title-greeting {
    display: block;
    font-size: 1.5rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 0.5rem;
}

.title-name {
    display: block;
    font-family: var(--font-heading);
    font-size: 4.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.8rem;
    margin-bottom: 2rem;
}

.subtitle-text {
    color: var(--text-secondary);
    font-weight: 400;
}

.subtitle-highlight {
    color: var(--primary-light);
    font-weight: 600;
    margin-left: 0.5rem;
}

.hero-description {
    max-width: 600px;
    margin: 0 auto 3rem;
}

.hero-description p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-bottom: 3rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.6);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 2px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.hero-social {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

.social-link {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--text-primary);
    font-size: 1.5rem;
    text-decoration: none;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.social-link:hover {
    background: var(--gradient-primary);
    transform: translateY(-5px) rotate(360deg);
    box-shadow: var(--shadow-glow);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    animation: bounce 2s infinite;
}

.scroll-text {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.scroll-arrow {
    font-size: 1.5rem;
}

/* CV SECTION */
.cv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 3rem;
}

.category-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    color: var(--primary-light);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.category-title i {
    font-size: 2rem;
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 2px;
    background: linear-gradient(180deg, var(--primary), var(--secondary));
}

.timeline-item {
    position: relative;
    margin-bottom: 2.5rem;
}

.timeline-dot {
    position: absolute;
    left: -2.5rem;
    top: 0.5rem;
    width: 16px;
    height: 16px;
    background: var(--gradient-primary);
    border-radius: 50%;
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.6);
    animation: pulse 2s infinite;
}

.timeline-content {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.timeline-content:hover {
    background: var(--bg-card-hover);
    transform: translateX(10px);
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.timeline-date {
    display: inline-block;
    background: var(--gradient-primary);
    color: white;
    padding: 0.3rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
}

.timeline-content h4 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

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

.company {
    color: var(--primary-light);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.description {
    margin-top: 0.8rem;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.tag {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-light);
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    border: 1px solid rgba(99, 102, 241, 0.3);
    transition: all var(--transition-fast);
}

.tag:hover {
    background: rgba(99, 102, 241, 0.3);
    transform: translateY(-2px);
}

/* CV DOWNLOAD SECTION */
.cv-download-section {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0 2rem 3rem;
    margin: 0;
}

.btn-download-cv {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    padding: 1.2rem 2.5rem;
    background: var(--gradient-primary);
    color: white;
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-glow);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn-download-cv::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-download-cv:hover::before {
    width: 400px;
    height: 400px;
}

.btn-download-cv:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 0 40px rgba(99, 102, 241, 0.7);
}

.btn-download-cv i {
    font-size: 1.3rem;
    animation: bounce 2s infinite;
}

.btn-download-cv span {
    position: relative;
    z-index: 1;
}

/* COMPETENCES SECTION */
.section-competences {
    background: rgba(0, 0, 0, 0.2);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.skill-category {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.skill-category:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.skill-category-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--primary-light);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid rgba(99, 102, 241, 0.3);
}

.skill-category-title i {
    font-size: 1.8rem;
}

.skills-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.skill-tag {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-light);
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    border: 1px solid rgba(99, 102, 241, 0.3);
    transition: all var(--transition-fast);
}

.skill-tag:hover {
    background: rgba(99, 102, 241, 0.35);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(99, 102, 241, 0.3);
}

/* PROJECTS SECTION */
.projects-category {
    margin-bottom: 4rem;
}

.category-subtitle {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.category-subtitle i {
    color: var(--primary-light);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 0;
}

.project-card:hover::before {
    opacity: 0.05;
}

.project-card:hover {
    transform: translateY(-3px);
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

.project-card>* {
    position: relative;
    z-index: 1;
}

.project-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.4rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    z-index: 2;
}

.new-badge {
    background: var(--gradient-accent);
    color: white;
    animation: pulse 2s infinite;
}

.project-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    font-size: 2rem;
    color: white;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-glow);
}

.project-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    min-height: 80px;
}

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

/* STAGES SECTION */
.stages-container {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.stage-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.stage-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.stage-header {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}

.stage-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    font-size: 2.5rem;
    color: white;
    flex-shrink: 0;
    box-shadow: var(--shadow-glow);
}

.stage-company {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.stage-date {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-light);
    font-size: 1rem;
}

.stage-intro {
    font-size: 1.2rem;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 1rem;
}

.stage-description {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.stage-tech h4 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
}

.tech-badge {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    background: rgba(99, 102, 241, 0.2);
    padding: 0.8rem 1.2rem;
    border-radius: var(--radius-md);
    color: var(--primary-light);
    font-weight: 500;
    border: 1px solid rgba(99, 102, 241, 0.3);
    transition: all var(--transition-fast);
}

.tech-badge:hover {
    background: rgba(99, 102, 241, 0.3);
    transform: translateX(5px);
}

.tech-badge i {
    font-size: 1.5rem;
}

/* VEILLE SECTION */
.veille-timeline {
    max-width: 900px;
    margin: 0 auto;
}

.veille-item {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    align-items: flex-start;
}

.veille-item:nth-child(even) {
    flex-direction: row-reverse;
}

.veille-date {
    flex-shrink: 0;
    width: 150px;
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-light);
    text-align: center;
    padding: 0.8rem;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-md);
}

.veille-content {
    flex: 1;
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
    position: relative;
}

.veille-content::before {
    content: '';
    position: absolute;
    top: 2rem;
    width: 20px;
    height: 2px;
    background: var(--primary);
}

.veille-item:nth-child(odd) .veille-content::before {
    left: -20px;
}

.veille-item:nth-child(even) .veille-content::before {
    right: -20px;
}

.veille-content:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

.veille-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    font-size: 1.5rem;
    color: white;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-glow);
}

.veille-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.veille-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* CONTACT SECTION */
.contact-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.contact-intro {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    line-height: 1.8;
}

.contact-info {
    margin-bottom: 3rem;
}

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.contact-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.contact-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    font-size: 1.8rem;
    color: white;
    box-shadow: var(--shadow-glow);
}

.contact-details h4 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.contact-details a {
    color: var(--primary-light);
    text-decoration: none;
    font-size: 1.1rem;
    transition: color var(--transition-fast);
}

.contact-details a:hover {
    color: var(--primary);
}

.contact-social {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

.social-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.social-btn:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.social-btn i {
    font-size: 1.5rem;
}

/* Footer */
.footer {
    background: var(--bg-darker);
    padding: 2rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content p {
    color: var(--text-muted);
    font-size: 0.95rem;
}