/* ========================================= */
/* CSS VARIABLES & RESET */
/* ========================================= */

:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.6);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --accent: #06b6d4;
    --accent-hover: #22d3ee;
    --accent-glow: rgba(6, 182, 212, 0.3);
    --font-main: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --section-spacing: 60px;
    --transition-base: 0.3s ease;
}

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

html { 
    scroll-behavior: smooth; 
}

section[id] { 
    scroll-margin-top: 80px; 
}

body { 
    scroll-margin-top: 0; 
}

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

/* ========================================= */
/* ANIMATIONS */
/* ========================================= */

.fade-in { 
    opacity: 0; 
    transform: translateY(30px); 
    transition: opacity 0.6s ease, transform 0.6s ease; 
}

.fade-in.visible { 
    opacity: 1; 
    transform: translateY(0); 
}

.slide-left { 
    opacity: 0; 
    transform: translateX(-50px); 
    transition: opacity 0.7s ease, transform 0.7s ease; 
}

.slide-left.visible { 
    opacity: 1; 
    transform: translateX(0); 
}

.slide-right { 
    opacity: 0; 
    transform: translateX(50px); 
    transition: opacity 0.7s ease, transform 0.7s ease; 
}

.slide-right.visible { 
    opacity: 1; 
    transform: translateX(0); 
}

@keyframes pulse { 
    0%, 100% { box-shadow: 0 0 10px var(--accent-glow); } 
    50% { box-shadow: 0 0 20px var(--accent-glow); } 
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes pulseText { 
    from { opacity: 0.7; transform: scale(0.98); } 
    to { opacity: 1; transform: scale(1.02); } 
}

/* ========================================= */
/* UTILITIES */
/* ========================================= */

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

a { 
    text-decoration: none; 
    color: inherit; 
    transition: var(--transition-base); 
    cursor: pointer; 
}

ul { 
    list-style: none; 
}

.section-title { 
    font-size: 2rem; 
    margin-bottom: 3rem; 
    text-align: center; 
}

.section-title span { 
    border-bottom: 3px solid var(--accent); 
    padding-bottom: 10px; 
    position: relative; 
    display: inline-block; 
}

.section-title span::after { 
    content: ''; 
    position: absolute; 
    bottom: -3px; 
    left: 0; 
    width: 0; 
    height: 3px; 
    background: var(--accent-hover); 
    transition: width 0.5s ease; 
}

.section-title span:hover::after { 
    width: 100%; 
}

.highlight { 
    color: var(--accent); 
    font-weight: bold; 
}

/* ========================================= */
/* BUTTONS */
/* ========================================= */

.btn {
    display: inline-flex; 
    align-items: center; 
    justify-content: center;
    background: var(--accent); 
    color: var(--bg-color);
    padding: 0 24px; 
    height: 50px; 
    border-radius: 5px;
    font-weight: bold; 
    text-transform: uppercase; 
    letter-spacing: 1px;
    cursor: pointer; 
    border: 1px solid transparent; 
    font-size: 1rem;
    position: relative; 
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    text-decoration: none; 
    min-width: 160px;
}

.btn::before {
    content: ''; 
    position: absolute; 
    top: 50%; 
    left: 50%; 
    width: 0; 
    height: 0;
    border-radius: 50%; 
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%); 
    transition: width 0.6s ease, height 0.6s ease;
}

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

.btn:hover { 
    transform: translateY(-2px); 
    box-shadow: 0 10px 25px var(--accent-glow); 
}

.btn-outline {
    background: transparent; 
    border: 1px solid var(--accent); 
    color: var(--accent);
}

.btn-outline:hover { 
    background: var(--accent); 
    color: var(--bg-color); 
}

/* ========================================= */
/* HEADER */
/* ========================================= */

header {
    position: fixed; 
    top: 0; 
    width: 100%;
    background: linear-gradient(to bottom, #0f172a 0%, rgba(15, 23, 42, 0.8) 50%, transparent 100%);
    z-index: 1000;
    padding: 20px 0 40px 0;
    transition: all var(--transition-base);
}

header.scrolled {
    background: rgba(15, 23, 42, 0.98);
    padding: 10px 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

nav { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
}

.logo { 
    font-size: 1.3rem; 
    font-weight: bold; 
    color: var(--accent); 
    text-shadow: 0 0 10px var(--accent-glow); 
    text-transform: uppercase; 
    letter-spacing: 1px; 
}

.nav-links { 
    display: flex; 
    gap: 20px; 
}

.nav-links a { 
    font-size: 0.9rem; 
    color: var(--text-muted); 
    position: relative; 
    padding-bottom: 5px; 
}

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

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

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

.lang-switch {
    background: transparent; 
    border: 1px solid var(--accent); 
    color: var(--accent);
    padding: 5px 15px; 
    border-radius: 20px; 
    cursor: pointer; 
    font-size: 0.8rem;
    transition: var(--transition-base); 
    position: relative; 
    overflow: hidden;
}

.lang-switch::before { 
    content: ''; 
    position: absolute; 
    top: 0; 
    left: -100%; 
    width: 100%; 
    height: 100%; 
    background: var(--accent); 
    transition: left var(--transition-base); 
    z-index: -1; 
}

.lang-switch:hover::before { 
    left: 0; 
}

.lang-switch:hover { 
    color: var(--bg-color); 
}

/* ========================================= */
/* HERO */
/* ========================================= */

.hero {
    min-height: 100vh; 
    display: flex; 
    align-items: center; 
    justify-content: center;
    text-align: center; 
    padding-top: 80px; 
    position: relative; 
    overflow: hidden;
}

.hero::before {
    content: ''; 
    position: absolute; 
    inset: 0;
    background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(6, 182, 212, 0.12) 0%, transparent 60%);
    opacity: 0.6; 
    pointer-events: none; 
    transition: opacity var(--transition-base);
}

.hero-content { 
    z-index: 1; 
    max-width: 900px; 
    padding: 0 20px; 
}

.hero-content h1 {
    font-size: 3.5rem; 
    margin-bottom: 15px; 
    line-height: 1.2;
    background: linear-gradient(135deg, var(--text-main), var(--accent));
    -webkit-background-clip: text; 
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content h2 { 
    font-size: 1.3rem; 
    color: var(--text-muted); 
    margin-bottom: 30px; 
    font-weight: 400; 
}

.cta-group { 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    gap: 20px; 
    flex-wrap: wrap; 
}

.badge {
    background: rgba(6, 182, 212, 0.1); 
    color: var(--accent); 
    padding: 5px 15px;
    border-radius: 50px; 
    font-size: 0.9rem; 
    display: inline-block; 
    margin-bottom: 25px;
    border: 1px solid var(--accent); 
    backdrop-filter: blur(10px);
    animation: pulse 2s ease-in-out infinite;
}

.profile-img-container {
    width: 220px; 
    height: 220px; 
    border-radius: 50%; 
    margin: 0 auto 30px;
    overflow: hidden; 
    border: 4px solid var(--accent);
    box-shadow: 0 0 40px var(--accent-glow); 
    background-color: var(--card-bg);
    position: relative; 
    transition: transform 0.1s ease; 
    will-change: transform;
}

.profile-img-container img { 
    width: 100%; 
    height: 100%; 
    object-fit: cover; 
    transition: transform var(--transition-base); 
}

.profile-img-container:hover img { 
    transform: scale(1.05); 
}

/* ========================================= */
/* EXPERIENCE (ZIG ZAG LAYOUT WITH ACCORDION) */
/* ========================================= */

.experience { 
    padding: var(--section-spacing) 0; 
    background: linear-gradient(180deg, #162036 0%, #0f172a 100%); 
}

.timeline { 
    position: relative; 
    max-width: 1000px; 
    margin: 0 auto; 
}

.timeline::after {
    content: ''; 
    position: absolute; 
    width: 2px;
    background: linear-gradient(180deg, var(--accent) 0%, transparent 100%);
    top: 0; 
    bottom: 0; 
    left: 50%; 
    margin-left: -1px;
}

.job-card {
    padding: 25px 30px; 
    background: var(--card-bg); 
    backdrop-filter: blur(20px) saturate(180%);
    position: relative; 
    width: 45%; 
    border-radius: 12px; 
    margin-bottom: 30px;
    border: 1px solid var(--card-border); 
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.job-card:hover { 
    transform: translateY(-5px); 
    box-shadow: 0 12px 40px rgba(6, 182, 212, 0.2); 
    border-color: var(--accent); 
}

/* Positionnement Zig Zag */
.left { 
    left: 0; 
}

.right { 
    left: 55%; 
}

/* Point sur la ligne */
.job-card::after {
    content: ''; 
    position: absolute; 
    width: 16px; 
    height: 16px;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    border: 4px solid var(--bg-color); 
    top: 30px; 
    border-radius: 50%;
    z-index: 1; 
    box-shadow: 0 0 15px var(--accent-glow);
}

.left::after { 
    right: -11.5%; 
}

.right::after { 
    left: -11.5%; 
}

.job-date { 
    color: var(--accent); 
    font-size: 0.85rem; 
    margin-bottom: 5px; 
    display: block; 
    font-weight: 600; 
    text-shadow: 0 0 10px var(--accent-glow); 
}

.job-title { 
    font-size: 1.2rem; 
    font-weight: bold; 
    margin-bottom: 5px; 
}

.job-company { 
    color: var(--text-muted); 
    font-style: italic; 
    margin-bottom: 15px; 
    font-size: 0.95rem; 
}

.job-desc { 
    margin-bottom: 0; 
}

.job-desc li { 
    margin-bottom: 8px; 
    font-size: 0.95rem; 
    position: relative; 
    padding-left: 20px; 
    color: #cbd5e1; 
}

.job-desc li::before { 
    content: '▹'; 
    position: absolute; 
    left: 0; 
    color: var(--accent); 
}

/* ACCORDION BUTTON */
.expand-btn {
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.1), rgba(6, 182, 212, 0.05));
    border: 1px solid var(--accent);
    color: var(--accent);
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    margin-top: 15px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.expand-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(6, 182, 212, 0.2), transparent);
    transition: left 0.6s ease;
}

.expand-btn:hover::before {
    left: 100%;
}

.expand-btn:hover {
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.2), rgba(6, 182, 212, 0.1));
    box-shadow: 0 4px 15px var(--accent-glow);
    transform: translateY(-2px);
}

.expand-btn:active {
    transform: translateY(0);
}

.expand-text {
    letter-spacing: 0.5px;
}

.expand-icon {
    font-size: 0.8rem;
    transition: transform var(--transition-base);
    display: inline-block;
}

.expand-btn[aria-expanded="true"] .expand-icon {
    transform: rotate(180deg);
}

/* ACCORDION CONTENT */
.job-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease, margin-top 0.3s ease;
    opacity: 0;
    margin-top: 0;
}

.job-details.expanded {
    max-height: 1000px;
    opacity: 1;
    margin-top: 15px;
}

.job-details .job-desc {
    background: rgba(6, 182, 212, 0.03);
    padding: 15px;
    border-radius: 8px;
    border-left: 3px solid var(--accent);
}

.job-details .job-desc li {
    color: #e2e8f0;
}

.job-details .job-desc li strong {
    color: var(--accent);
    font-weight: 700;
}

/* ========================================= */
/* SKILLS */
/* ========================================= */

.skills { 
    padding: var(--section-spacing) 0; 
}

.skills-grid {
    display: grid;
    gap: 25px;
    grid-template-columns: 1fr;
}

@media (min-width: 700px) {
    .skills-grid { 
        grid-template-columns: repeat(2, 1fr); 
    }
}

@media (min-width: 1100px) {
    .skills-grid { 
        grid-template-columns: repeat(4, 1fr); 
    }
}

.skill-card {
    background: var(--card-bg); 
    backdrop-filter: blur(20px) saturate(180%);
    padding: 25px; 
    border-radius: 12px; 
    text-align: center;
    border: 1px solid var(--card-border); 
    border-top: 3px solid var(--accent);
    transition: transform var(--transition-base), box-shadow var(--transition-base); 
    position: relative; 
    overflow: hidden;
    height: 100%; 
    display: flex; 
    flex-direction: column; 
    align-items: center;
}

.skill-card:hover { 
    transform: translateY(-5px) scale(1.02); 
    box-shadow: 0 10px 40px var(--accent-glow); 
}

.skill-icon { 
    font-size: 2rem; 
    margin-bottom: 15px; 
    display: block; 
    filter: drop-shadow(0 0 10px var(--accent-glow)); 
    transition: transform var(--transition-base); 
}

.skill-card:hover .skill-icon { 
    transform: scale(1.1) rotate(5deg); 
}

.skill-title { 
    font-size: 1.1rem; 
    font-weight: bold; 
    margin-bottom: 10px; 
    display: block; 
}

.skill-list { 
    color: var(--text-muted); 
    font-size: 0.95rem; 
    line-height: 1.5; 
}

/* ========================================= */
/* INTERESTS */
/* ========================================= */

.interests { 
    padding: var(--section-spacing) 0; 
    background: linear-gradient(180deg, #0f172a 0%, #162036 100%); 
}

.interests-grid { 
    display: flex; 
    justify-content: center; 
    gap: 30px; 
    flex-wrap: wrap; 
}

.interest-item {
    background: var(--card-bg); 
    backdrop-filter: blur(20px) saturate(180%);
    padding: 20px 30px; 
    border-radius: 50px; 
    border: 1px solid var(--card-border);
    display: flex; 
    align-items: center; 
    gap: 15px; 
    transition: all var(--transition-base);
}

.interest-item:hover { 
    border-color: var(--accent); 
    transform: scale(1.05); 
    box-shadow: 0 5px 20px var(--accent-glow); 
}

.int-icon { 
    font-size: 1.5rem; 
    transition: transform var(--transition-base); 
}

.interest-item:hover .int-icon { 
    transform: rotate(10deg) scale(1.1); 
}

.int-text strong { 
    display: block; 
    color: var(--text-main); 
    font-size: 1rem; 
}

.int-text span { 
    font-size: 0.85rem; 
    color: var(--text-muted); 
}

/* ========================================= */
/* CONTACT */
/* ========================================= */

.contact { 
    padding: var(--section-spacing) 0; 
    text-align: center; 
    background: linear-gradient(to top, #0f172a, #162036); 
}

.contact-box {
    max-width: 750px; 
    margin: 0 auto; 
    background: var(--card-bg);
    backdrop-filter: blur(20px) saturate(180%);
    padding: 50px; 
    border-radius: 15px; 
    border: 1px solid var(--card-border);
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.5); 
    transition: transform var(--transition-base);
}

.contact-box:hover { 
    transform: translateY(-5px); 
    box-shadow: 0 15px 60px var(--accent-glow); 
}

#contact-intro { 
    font-size: 1.1rem; 
    color: var(--text-muted); 
    margin-bottom: 30px; 
}

.contact-info { 
    margin: 25px 0; 
    font-size: 1.1rem; 
}

.contact-info p { 
    margin-bottom: 8px; 
}

.email-link { 
    color: var(--accent); 
    font-weight: bold; 
    position: relative; 
}

.email-link::after { 
    content: ''; 
    position: absolute; 
    bottom: -2px; 
    left: 0; 
    width: 100%; 
    height: 1px; 
    background: var(--accent); 
    transform: scaleX(0); 
    transition: transform var(--transition-base); 
}

.email-link:hover::after { 
    transform: scaleX(1); 
}

footer { 
    text-align: center; 
    padding: 40px 20px; 
    color: var(--text-muted); 
    font-size: 0.9rem; 
    border-top: 1px solid var(--card-border); 
}

/* ========================================= */
/* DOWNLOAD OVERLAY */
/* ========================================= */

#download-overlay {
    position: fixed; 
    inset: 0; 
    z-index: 9999;
    display: none;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    align-items: center; 
    justify-content: center;
    flex-direction: column;
}

.overlay-content { 
    text-align: center; 
    color: var(--text-main); 
}

.spinner {
    width: 70px; 
    height: 70px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top: 4px solid var(--accent);
    border-right: 4px solid var(--accent);
    animation: spin 1s cubic-bezier(0.68, -0.55, 0.27, 1.55) infinite;
    margin: 0 auto 30px auto;
    box-shadow: 0 0 25px var(--accent-glow);
}

#overlay-text {
    font-size: 1.8rem; 
    font-weight: 300; 
    letter-spacing: 2px;
    background: linear-gradient(135deg, #fff, var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: pulseText 1.5s infinite alternate;
}

/* ========================================= */
/* RESPONSIVE MOBILE */
/* ========================================= */

@media screen and (max-width: 768px) {
    .hero-content h1 { 
        font-size: 2.2rem; 
    }

    .hero-content h2 { 
        font-size: 1.1rem; 
    }

    /* Timeline Mobile: tout à gauche */
    .timeline::after { 
        left: 30px; 
    }

    .job-card { 
        width: 100%; 
        padding-left: 70px; 
        padding-right: 20px; 
        margin-left: 0; 
    }

    .left::after, .right::after { 
        left: 21px; 
        right: auto; 
    }

    .left, .right { 
        left: 0; 
    }

    .nav-links { 
        display: none; 
    }

    .profile-img-container { 
        width: 180px; 
        height: 180px; 
    }

    .contact-box {
        padding: 30px 20px;
    }

    .interest-item {
        padding: 15px 20px;
    }
}

@media screen and (max-width: 480px) {
    .hero-content h1 { 
        font-size: 1.8rem; 
    }

    .cta-group {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .expand-btn {
        font-size: 0.85rem;
        padding: 8px 15px;
    }
}