:root {
    --color-bg: #FFFFFF;
    --color-surface: #F9FAFB;
    --color-primary: #0047AB;
    --color-primary-light: #2563EB;
    --color-primary-dark: #1E3A8A;
    --color-primary-rgb: 0, 71, 171;
    --color-secondary: #4B5563;
    --color-text-main: #111827;
    --color-text-muted: #6B7280;
    --color-border: rgba(0, 0, 0, 0.1);
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --transition-slow: all 0.6s cubic-bezier(0.22, 1, 0.36, 1);
    --transition-mid: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --container-width: 1920px;
    --nav-height: 90px;
}

/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    cursor: none;
}

html {
    scroll-behavior: smooth;
    background-color: var(--color-bg);
}

body {
    font-family: var(--font-body);
    color: var(--color-text-main);
    background-color: transparent;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('assets/img/architect_bg_5.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.3;
    pointer-events: none;
    z-index: -1;
    animation: backgroundMove 100s infinite linear;
}

@keyframes backgroundMove {
    0% { transform: scale(1) translate(0, 0); }
    50% { transform: scale(1.05) translate(-0.5%, -0.5%); }
    100% { transform: scale(1) translate(0, 0); }
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 3vw;
}

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

ul { list-style: none; }
img { max-width: 100%; display: block; }
section { padding: 8rem 0; }

/* Custom Cursor */
.cursor {
    width: 8px;
    height: 8px;
    background-color: var(--color-primary);
    border-radius: 50%;
    position: fixed;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 9999;
    transition: width 0.3s ease, height 0.3s ease, opacity 0.3s ease;
    transform: translate(-50%, -50%);
}

.cursor-follower {
    width: 40px;
    height: 40px;
    border: 1px solid var(--color-primary);
    border-radius: 50%;
    position: fixed;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 9998;
    transition: width 0.3s ease, height 0.3s ease, opacity 0.3s ease, border-color 0.3s ease;
    transform: translate(-50%, -50%);
}

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.1;
}

.text-gradient {
    background: linear-gradient(135deg, #111827 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 4rem;
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

.section-title span { color: var(--color-primary); }

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 1000;
    display: flex;
    align-items: center;
    transition: var(--transition-mid);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    height: 70px;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-weight: 900;
    font-size: 1.5rem;
    letter-spacing: 0.1em;
}

.logo-dot {
    width: 6px;
    height: 6px;
    background-color: var(--color-primary);
    border-radius: 50%;
}

.nav-links {
    display: flex;
    gap: 3rem;
    align-items: center;
}

.nav-item {
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    position: relative;
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-primary);
    transition: var(--transition-mid);
}

.nav-item:hover, .nav-item.active { color: var(--color-text-main); }
.nav-item:hover::after, .nav-item.active::after { width: 100%; }

.menu-toggle {
    display: none;
    background: none;
    border: none;
    padding: 10px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text-main);
    margin: 5px 0;
    transition: var(--transition-mid);
}

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

.hero-bg-shapes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.15;
}

.blob-1 {
    width: 500px;
    height: 500px;
    background: var(--color-primary);
    top: -100px;
    right: -100px;
    animation: float 20s infinite alternate;
}

.blob-2 {
    width: 400px;
    height: 400px;
    background: #4F46E5;
    bottom: -50px;
    left: -50px;
    animation: float 25s infinite alternate-reverse;
}

@keyframes float {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 80px); }
}

.hero-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.meta-line {
    width: 40px;
    height: 1px;
    background-color: var(--color-primary);
}

.meta-text {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    color: var(--color-primary);
    font-weight: 600;
}

.hero-title {
    font-size: clamp(3.5rem, 9vw, 8.5rem);
    margin-bottom: 2rem;
    max-width: 1400px;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    color: var(--color-text-muted);
    max-width: 800px;
    margin-bottom: 3.5rem;
    font-weight: 300;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.btn-main {
    display: inline-flex;
    align-items: center;
    gap: 1.5rem;
    background: var(--color-primary);
    color: var(--color-bg);
    padding: 1.25rem 2.5rem;
    border-radius: 4px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.875rem;
    transition: var(--transition-mid);
    position: relative;
    overflow: hidden;
}

.btn-main:hover { opacity: 0.9; }

.scroll-indicator {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--color-text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
}

.mouse {
    width: 20px;
    height: 35px;
    border: 1px solid var(--color-text-muted);
    border-radius: 20px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 6px;
    background-color: var(--color-primary);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { opacity: 1; transform: translate(-50%, 0); }
    100% { opacity: 0; transform: translate(-50%, 15px); }
}

/* About Section Premium */
.about { 
    background-color: var(--color-surface);
    position: relative;
    padding: 10rem 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 8rem;
    align-items: center;
}

.about-image-container {
    position: relative;
    width: 100%;
}

.about-image-wrapper {
    aspect-ratio: 4/5;
    overflow: hidden;
    position: relative;
    box-shadow: 30px 30px 0px rgba(0, 71, 171, 0.05);
    border: 1px solid var(--color-border);
}

.about-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%);
    transition: var(--transition-slow);
}

.about-image-wrapper:hover img {
    filter: grayscale(0%);
    transform: scale(1.05);
}

.experience-badge {
    position: absolute;
    bottom: -30px;
    right: -30px;
    background-color: var(--color-primary);
    color: white;
    padding: 2.5rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    box-shadow: 0 20px 40px rgba(0, 71, 171, 0.2);
    z-index: 10;
}

.experience-badge .years {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1;
    font-family: var(--font-heading);
}

.experience-badge .text {
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.2em;
    margin-top: 0.5rem;
}

.about-content .lead {
    font-size: 2rem;
    font-weight: 500;
    color: var(--color-text-main);
    margin-bottom: 2.5rem;
    line-height: 1.4;
}

.about-content p {
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
    font-size: 1.15rem;
    font-weight: 300;
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 4rem;
}

/* Projects Section */
.projects { padding: 10rem 0; }
.category-block { margin-bottom: 6rem; }
.category-block:last-child { margin-bottom: 0; }

.category-heading {
    font-family: var(--font-heading);
    font-size: clamp(1.25rem, 2.5vw, 2rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
    color: var(--color-text-main);
    text-transform: uppercase;
    position: relative;
    display: inline-block;
}

.category-heading::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 30px;
    height: 3px;
    background-color: var(--color-primary);
}

.filter-bar {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: none;
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2.5rem;
    position: relative;
    min-height: 400px;
}

.project-card {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
    background-color: var(--color-surface);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-card.hidden {
    opacity: 0;
    transform: scale(0.9);
    pointer-events: none;
    position: absolute;
    visibility: hidden;
}

.project-image {
    width: 100%;
    height: 100%;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.project-info-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent 0%, rgba(255,255,255,0.4) 50%, rgba(255,255,255,0.95) 100%);
    padding: 3rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition-mid);
}

.project-card:hover .project-info-overlay {
    opacity: 1;
    transform: translateY(0);
    backdrop-filter: blur(10px);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-category {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-primary);
    margin-bottom: 1rem;
    display: block;
}

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

.project-desc {
    color: var(--color-text-muted);
    font-size: 0.8rem;
    margin-bottom: 1rem;
}

/* Contact Section Premium */
.contact { 
    padding: 12rem 0;
    position: relative;
}

.contact-card {
    background: white;
    padding: 6rem;
    border: 1px solid var(--color-border);
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 6rem;
    align-items: center;
    box-shadow: 0 40px 100px rgba(0,0,0,0.03);
}

.contact-title {
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    line-height: 1.1;
    margin-bottom: 2rem;
    font-family: var(--font-heading);
    font-weight: 700;
}

.contact-title span {
    color: var(--color-primary);
}

.contact-text {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    margin-bottom: 3.5rem;
    font-weight: 300;
    max-width: 600px;
}

.social-minimal {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.social-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-text-muted);
    transition: var(--transition-mid);
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--color-border);
}

.social-item:hover {
    color: var(--color-primary);
    padding-left: 1.5rem;
    border-color: var(--color-primary);
}

.social-item i {
    font-size: 1.2rem;
}

/* Footer */
footer {
    padding: 5rem 0;
    border-top: 1px solid var(--color-border);
    background: white;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.footer-links {
    display: flex;
    gap: 3rem;
}

.footer-links a {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-muted);
    font-weight: 600;
}

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

/* Animations */
.fade-in-up {
    opacity: 1;
    transform: none;
}

body.js-ready .fade-in-up:not(.visible) {
    opacity: 0;
    transform: translateY(30px);
}

.fade-in-up.visible {
    opacity: 1 !important;
    transform: translateY(0) !important;
    transition: opacity 0.8s ease, transform 0.8s ease;
}

/* Lightbox */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.lightbox.active {
    display: flex;
    opacity: 1;
}

.lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 80vh;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
}

.lightbox-close {
    position: fixed;
    top: 2rem;
    right: 2rem;
    background: none;
    border: none;
    color: white;
    font-size: 3rem;
    cursor: none;
}

/* RECONSTRUCTION MOBILE (FROM SCRATCH) */
@media (max-width: 1100px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
    
    .about-image-container {
        max-width: 500px;
        margin: 0 auto;
    }

    .about-content .lead {
        font-size: 1.25rem;
    }
}

@media (max-width: 1024px) {
    * { cursor: auto !important; }
    .cursor, .cursor-follower { display: none !important; }
    
    .container { padding: 0 5vw; }
    section { padding: 5rem 0; }
    
    .nav-links { 
        display: none; 
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem !important;
    }
    
    .nav-links.active {
        display: flex !important;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: white;
        z-index: 2000;
        padding: 2rem;
    }

    .nav-links.active .nav-item {
        font-size: 1.5rem;
    }

    .menu-toggle { 
        display: block; 
        z-index: 2001;
        position: relative;
    }
    
    .hero-title { font-size: 3rem; }
    .hero-actions { flex-direction: column; align-items: flex-start; gap: 2rem; }
}

@media (max-width: 768px) {
    .section-title { font-size: 2.5rem; margin-bottom: 2.5rem; }

    /* Forcer la visibilité immédiate pour éviter le bug de l'IntersectionObserver */
    .fade-in-up, .project-card, .category-block, .projects-grid {
        opacity: 1 !important;
        transform: none !important;
        visibility: visible !important;
        display: block !important;
    }

    .projects-grid {
        width: 100%;
        margin-top: 2rem;
    }

    .project-card {
        aspect-ratio: 4/3;
        width: 100%;
        margin-bottom: 1.5rem;
        border-radius: 8px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    }

    .project-info-overlay {
        opacity: 1;
        transform: none;
        background: linear-gradient(to bottom, transparent 0%, rgba(0,0,0,0.7) 100%);
        padding: 1.5rem;
        backdrop-filter: none;
    }

    .project-name { color: white; font-size: 1.2rem; }
    .project-category { color: var(--color-primary-light); margin-bottom: 0.5rem; }
    .project-desc { display: none; }
    .project-link { color: white; font-size: 0.8rem; }
      .expertise-grid {
        grid-template-columns: 1fr !important;
        gap: 1.5rem !important;
    }

    .about-image-wrapper {
        margin-bottom: 3rem;
        box-shadow: 15px 15px 0px rgba(0, 71, 171, 0.05);
    }

    .experience-badge {
        position: relative !important;
        bottom: 0 !important;
        right: 0 !important;
        width: 100% !important;
        padding: 2rem !important;
        margin-top: -2rem;
        box-shadow: 0 10px 20px rgba(0, 71, 171, 0.1);
    }

    .experience-badge .years { font-size: 3rem !important; }
    
    .about-content .lead { 
        font-size: 1.3rem !important; 
        margin-top: 3rem;
        line-height: 1.3;
    }

    .contact-card {
        padding: 4rem 2rem !important;
        width: 100% !important;
        margin: 0 !important;
        border-radius: 0 !important;
        grid-template-columns: 1fr !important;
        gap: 4rem !important;
        box-shadow: none !important;
    }

    .social-minimal {
        gap: 0 !important;
        margin-top: 2rem !important;
    }

    .social-item {
        padding: 1.2rem 0 !important;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 2.5rem;
        text-align: center;
    }

    .footer-links {
        gap: 1.5rem !important;
        flex-direction: column;
    }
    
    .navbar.scrolled { height: 60px; }
}