/* ===== RESET ET BASE ===== */
/* Reset CSS pour une base propre et cohérente */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Respecter la préférence de l'utilisateur pour réduire les animations */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Variables CSS pour une gestion centralisée des couleurs et tailles */
:root {
    /* Couleurs principales selon les spécifications */
    --primary-color: #2E2E2E;        /* Fond principal gris foncé */
    --accent-color: #02855f;          /* Vert émeraude pour les accents */
    --text-color: #ffffff;            /* Texte blanc */
    --text-light: #e0e0e0;           /* Texte gris clair */
    --text-muted: #a0a0a0;           /* Texte gris moyen */
    
    /* Couleurs supplémentaires */
    --dark-color: #1a1a1a;           /* Fond plus sombre */
    --light-color: #f8f9fa;          /* Fond clair pour contraste */
    --border-color: #404040;         /* Bordures */
    --overlay-color: rgba(46, 46, 46, 0.9); /* Overlay semi-transparent */
    
    /* Typographie */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xl: 3.5rem;          /* Titre principal */
    --font-size-lg: 2.5rem;          /* Titre section */
    --font-size-md: 1.25rem;         /* Sous-titre */
    --font-size-base: 1rem;          /* Texte normal */
    --font-size-sm: 0.875rem;        /* Texte petit */
    
    /* Espacements */
    --container-max-width: 1200px;   /* Largeur max du conteneur */
    --section-padding: 5rem 0;       /* Padding des sections */
    --element-spacing: 1.5rem;       /* Espacement entre éléments */
    
    /* Transitions et animations */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s ease;
    --transition-slow: all 0.5s ease;
    
    /* Ombres */
    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 20px rgba(0, 0, 0, 0.15);
    --shadow-heavy: 0 8px 40px rgba(0, 0, 0, 0.25);
    
    /* Rayons de bordure */
    --border-radius: 8px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
}

/* Configuration de base */
html {
    scroll-behavior: smooth;          /* Scroll fluide pour les ancres */
    font-size: 16px;                  /* Taille de base pour le calcul des rem */
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--primary-color);
    overflow-x: hidden;               /* Évite le scroll horizontal */
}

/* ===== TYPOGRAPHIE ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-color);
}

h1 {
    font-size: var(--font-size-xl);
}

h2 {
    font-size: var(--font-size-lg);
}

h3 {
    font-size: var(--font-size-md);
}

p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

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

a:hover {
    color: var(--text-color);
}

/* ===== CONTENEUR ET LAYOUT ===== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: var(--section-padding);
    position: relative;
}

.section__header {
    text-align: center;
    margin-bottom: 4rem;
}

.section__title {
    font-size: var(--font-size-lg);
    margin-bottom: 1rem;
    color: var(--text-color);
    position: relative;
    /* Optimisations pour animations fluides */
    will-change: transform, opacity;
    transform: translateZ(0);
    backface-visibility: hidden;
}

.section__title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--accent-color);
    margin: 1rem auto 0;
    border-radius: 2px;
}

.section__subtitle {
    font-size: var(--font-size-md);
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
    /* Optimisations pour animations fluides */
    will-change: transform, opacity;
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* ===== HEADER ET NAVIGATION ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(46, 46, 46, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header.scrolled {
    background: rgba(26, 26, 26, 0.98);
    box-shadow: var(--shadow-medium);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.nav__logo-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav__logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
    transition: var(--transition);
}

.nav__logo-icon {
    width: 32px;
    height: 32px;
    transition: var(--transition);
}

.nav__logo-link:hover .nav__logo-text {
    color: var(--text-color);
}

.nav__logo-link:hover .nav__logo-icon {
    transform: scale(1.1);
}

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

.nav__link {
    color: var(--text-light);
    font-weight: 500;
    position: relative;
    transition: var(--transition);
    padding: 0.5rem 0;
}

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

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

.nav__link:hover::after {
    width: 100%;
}

.nav__toggle {
    display: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
}

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

/* ===== BOUTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border: none;
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn--primary {
    background: var(--accent-color);
    color: var(--text-color);
    box-shadow: var(--shadow-light);
}

.btn--primary:hover {
    background: #026a4a;
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn--secondary {
    background: transparent;
    color: var(--text-color);
    border: 2px solid var(--accent-color);
}

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

.btn--outline {
    background: transparent;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
}

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

.btn--full {
    width: 100%;
    justify-content: center;
}

/* ===== SECTION ACCUEIL ===== */
.home {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--dark-color) 100%);
    position: relative;
    overflow: hidden;
}

.home__container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 2;
}

.home__title {
    font-size: clamp(2.5rem, 5vw, var(--font-size-xl));
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.home__title-line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

.home__title-name {
    font-size: 0.8em;
    font-weight: 600;
    display: inline-block;
}

.home__title-role {
    font-size: 1.2em;
    font-weight: 700;
    display: inline-block;
    margin-left: 0.5em;
}

.home__title-subtitle {
    font-size: 0.7em;
    font-weight: 500;
    display: block;
    margin-top: 0.3em;
    opacity: 0.9;
}

.home__title-line:nth-child(2) {
    animation-delay: 0.3s;
    color: var(--accent-color);
}

.home__subtitle {
    font-size: var(--font-size-md);
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease 0.6s forwards;
}

.home__buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease 0.9s forwards;
}

.home__decoration {
    position: absolute;
    top: 50%;
    right: 10%;
    transform: translateY(-50%);
    opacity: 0.2;
    z-index: 1;
    pointer-events: none;
}

.home__circle {
    width: 300px;
    height: 300px;
    border: 2px solid var(--accent-color);
    border-radius: 50%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: auto;
}

.home__audio-bars {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    transform-origin: center;
}

.home__audio-bar {
    position: absolute;
    width: 4px;
    background: var(--accent-color);
    border-radius: 2px;
    transform-origin: bottom center;
    opacity: 0.65;
    transition: height 0.1s ease, opacity 0.1s ease;
    will-change: height, opacity;
    pointer-events: none;
}

/* ===== SECTION TIMELINE ===== */
.timeline {
    background: var(--dark-color);
    position: relative;
}

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

.timeline__line {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--border-color);
    transform: translateY(-50%);
    z-index: 1;
}

.timeline__progress {
    height: 100%;
    background: var(--accent-color);
    width: 0;
    transition: width 0.5s ease;
}

.timeline__items {
    display: flex;
    justify-content: space-between;
    position: relative;
    z-index: 2;
    margin-top: 6rem;
}

.timeline__item {
    position: relative;
    cursor: pointer;
    transition: var(--transition);
    flex: 1;
    max-width: 200px;
}

/* Style pour les liens dans la timeline */
.timeline__item a,
a.timeline__item {
    text-decoration: none;
    color: inherit;
    display: block;
}

a.timeline__item:visited {
    color: inherit;
}

.timeline__item:hover {
    transform: translateY(-10px);
}

.timeline__dot {
    width: 16px;
    height: 16px;
    background: var(--accent-color);
    border: 4px solid var(--dark-color);
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 3;
    transition: var(--transition);
}

.timeline__item:hover .timeline__dot,
.timeline__item.active .timeline__dot {
    transform: translate(-50%, -50%) scale(1.2);
    box-shadow: 0 0 20px var(--accent-color);
}

.timeline__content {
    text-align: center;
    padding-top: 5rem;
    opacity: 1;
    transform: translateY(0);
    transition: var(--transition);
    margin-top: 4rem;
}

.timeline__item:hover .timeline__content {
    opacity: 1;
    transform: translateY(0);
}

.timeline__image {
    width: 120px;
    height: 80px;
    margin: 0 auto 1rem;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-medium);
}

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

.timeline__item:hover .timeline__image img {
    transform: scale(1.1);
}

.timeline__title {
    font-size: var(--font-size-base);
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.timeline__date {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

/* ===== SECTION GALERIE ===== */
.gallery {
    background: var(--primary-color);
}

.gallery__container {
    display: grid;
    gap: 6rem;
}

.project {
    opacity: 0;
    transform: translateY(50px) translateZ(0);
    transition: var(--transition);
    /* Optimisations pour animations fluides */
    will-change: transform, opacity;
    backface-visibility: hidden;
    -webkit-font-smoothing: antialiased;
}

.project.animate {
    opacity: 1;
    transform: translateY(0) translateZ(0);
    will-change: auto; /* Retirer après animation */
}

.project__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

/* Projet 1 (Bio Cycle) - Image à gauche */
#project-1 .project__content {
    direction: ltr;
}

/* Projet 3 (Redbull) - Image à droite */
#project-3 .project__content {
    direction: rtl;
}

#project-3 .project__content > * {
    direction: ltr;
}

/* Projet 4 (TerrePsyCorps) - Image à gauche */
#project-4 .project__content {
    direction: ltr;
}

.project__image {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-heavy);
    transition: var(--transition);
}

.project__image:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.3);
}

.project__image img {
    width: 100%;
    height: auto;
    min-height: 300px;
    object-fit: cover;
    transition: var(--transition);
}

.project__overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(2, 133, 95, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: var(--transition);
}


.project__play-btn {
    width: 80px;
    height: 80px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    color: var(--accent-color);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.project__play-btn:hover {
    background: var(--text-color);
    transform: scale(1.1);
}

.project__video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.7;
    transition: var(--transition);
    z-index: 1;
}

.project__overlay:hover .project__play-btn {
    opacity: 0.8;
}

/* Ajustement spécifique pour les projets avec vidéo */
#project-1 .project__image,
#project-3 .project__image {
    min-height: 400px;
}

/* Supprimer l'overlay vert pour les projets avec vidéo */
#project-1 .project__overlay,
#project-3 .project__overlay {
    background: transparent;
}

/* Supprimer l'overlay vert pour le projet TerrePsyCorps */
#project-4 .project__overlay {
    background: transparent;
}

/* Hauteur minimale pour les projets sans vidéo */
#project-2 .project__image {
    min-height: 300px;
    background: rgba(2, 133, 95, 0.1);
}

/* Ajustement pour le projet Cryptique avec image */
#project-5 .project__image {
    min-height: 300px;
}

#project-5 .project__image img {
    width: 100%;
    height: 300px;
    object-fit: contain;
    object-position: center;
}

/* Supprimer l'overlay vert pour le projet Cryptique */
#project-5 .project__overlay {
    background: transparent;
}

/* Ajustement pour le projet TerrePsyCorps avec image */
#project-4 .project__image {
    min-height: 300px;
    background: #ffffff;
}

#project-4 .project__image img {
    width: 100%;
    height: 300px;
    object-fit: contain;
    object-position: center;
}

.project__info {
    padding: 1rem 0;
}

.project__title {
    font-size: var(--font-size-lg);
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.project__category {
    color: var(--accent-color);
    font-weight: 500;
    margin-bottom: 1rem;
    text-transform: uppercase;
    font-size: var(--font-size-sm);
    letter-spacing: 1px;
}

.project__description {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.project__tech {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.tech-tag {
    padding: 0.25rem 0.75rem;
    background: rgba(2, 133, 95, 0.1);
    color: var(--accent-color);
    border: 1px solid rgba(2, 133, 95, 0.3);
    border-radius: 20px;
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.gallery__footer {
    text-align: center;
    margin-top: 4rem;
}

/* ===== SECTION À PROPOS ===== */
.about {
    background: var(--dark-color);
}

.about__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about__content {
    display: flex;
    flex-direction: column;
}

.about__image {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 12rem;
}

/* Image visible sur desktop uniquement */
.about__image--desktop {
    display: flex;
}

/* Image visible sur mobile uniquement */
.about__image--mobile {
    display: none;
    margin-top: 0;
    margin-bottom: 2rem;
}

.about__text {
    margin-bottom: 2rem;
}

.about__text p {
    margin-bottom: 1.5rem;
    color: var(--text-light);
    line-height: 1.7;
}

.about__skills-title {
    font-size: var(--font-size-md);
    color: var(--text-color);
    margin-bottom: 1.5rem;
}

.skills__grid {
    display: grid;
    gap: 1.5rem;
}

.skill__item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.skill__item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(10px);
}

.skill__icon {
    width: 50px;
    height: 50px;
    background: var(--accent-color);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.skill__name {
    font-size: var(--font-size-base);
    color: var(--text-color);
    margin-bottom: 0.25rem;
}

.skill__description {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin: 0;
}

.about__image-container {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-heavy);
}

.about__image img {
    width: 100%;
    height: 520px;
    object-fit: cover;
}

.about__image-decoration {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100px;
    height: 100px;
    background: var(--accent-color);
    border-radius: 50%;
    opacity: 0.1;
}

/* Bouton CV */
.about__cv {
    margin-top: 2.5rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: center;
}

.btn--cv {
    font-size: 1.05rem;
    padding: 1rem 2.5rem;
    box-shadow: 0 4px 20px rgba(2, 133, 95, 0.3);
    animation: pulse-cv 2s ease-in-out infinite;
}

.btn--cv i {
    font-size: 1.1rem;
}

@keyframes pulse-cv {
    0%, 100% {
        box-shadow: 0 4px 20px rgba(2, 133, 95, 0.3);
    }
    50% {
        box-shadow: 0 6px 30px rgba(2, 133, 95, 0.5);
    }
}

.btn--cv:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 40px rgba(2, 133, 95, 0.6);
    animation: none;
}

/* ===== SECTION CONTACT ===== */
.contact {
    background: var(--primary-color);
    position: relative;
    overflow: hidden;
    padding-bottom: 0; /* Pas de padding pour que le footer soit collé */
}

.contact__wave {
    position: absolute;
    bottom: -50px; /* Remontée pour être plus visible tout en étant cachée par le footer */
    left: 50%;
    width: 200%;
    height: 350px;
    transform: translateX(-50%);
    z-index: 0;
    pointer-events: none;
}

.contact__wave-svg {
    width: 100%;
    height: 100%;
    display: block;
}

.contact__wave-path {
    fill: var(--accent-color);
    opacity: 0.15;
    animation: waveMove 8s ease-in-out infinite;
    transform-origin: center;
}

.contact__wave-path--1 {
    animation-delay: 0s;
    fill: var(--accent-color);
    opacity: 0.2;
    animation-duration: 8s;
}

.contact__wave-path--2 {
    animation-delay: -2.5s;
    fill: #03a876;
    opacity: 0.15;
    animation-duration: 10s;
}

.contact__wave-path--3 {
    animation-delay: -5s;
    fill: #01c989;
    opacity: 0.1;
    animation-duration: 12s;
}

@keyframes waveMove {
    0%, 100% {
        transform: translateX(0) translateY(0);
    }
    25% {
        transform: translateX(-2%) translateY(-5px);
    }
    50% {
        transform: translateX(0) translateY(-10px);
    }
    75% {
        transform: translateX(2%) translateY(-5px);
    }
}

@keyframes waveAnimation {
    0%, 100% {
        d: path("M0,64L48,69.3C96,75,192,85,288,80C384,75,480,53,576,48C672,43,768,53,864,58.7C960,64,1056,64,1152,58.7C1248,53,1344,43,1392,37.3L1440,32L1440,120L1392,120C1344,120,1248,120,1152,120C1056,120,960,120,864,120C768,120,672,120,576,120C480,120,384,120,288,120C192,120,96,120,48,120L0,120Z");
    }
    50% {
        d: path("M0,80L48,74.7C96,69,192,59,288,58.7C384,59,480,69,576,69.3C672,69,768,59,864,53.3C960,48,1056,48,1152,48C1248,48,1344,48,1392,48L1440,48L1440,120L1392,120C1344,120,1248,120,1152,120C1056,120,960,120,864,120C768,120,672,120,576,120C480,120,384,120,288,120C192,120,96,120,48,120L0,120Z");
    }
}

/* Assurer que le contenu est au-dessus de la vague */
.contact__container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact__info-title {
    font-size: var(--font-size-md);
    color: var(--text-color);
    margin-bottom: 2rem;
}

.contact__info-items {
    margin-bottom: 3rem;
}

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

.contact__info-icon {
    width: 50px;
    height: 50px;
    background: var(--accent-color);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.contact__info-content h4 {
    font-size: var(--font-size-base);
    color: var(--text-color);
    margin-bottom: 0.25rem;
}

.contact__info-content p {
    color: var(--text-light);
    margin: 0;
}

.contact__social h4 {
    font-size: var(--font-size-base);
    color: var(--text-color);
    margin-bottom: 1rem;
}

.social__links {
    display: flex;
    gap: 1rem;
}

.social__link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    transition: var(--transition);
}

.social__link:hover {
    background: var(--accent-color);
    color: var(--text-color);
    transform: translateY(-3px);
}

.stage-popup {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: min(360px, calc(100% - 3rem));
    background: rgba(26, 26, 26, 0.92);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
    padding: 1.75rem;
    z-index: 1100;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    transform: translateY(25px);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-slow);
    pointer-events: none;
}

.stage-popup.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

.stage-popup__header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
}

.stage-popup__badge {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    background: rgba(2, 133, 95, 0.18);
    color: var(--accent-color);
    padding: 0.45rem 0.75rem;
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.stage-popup__badge i {
    font-size: 0.95rem;
}

.stage-popup__title {
    font-size: 1.35rem;
    color: var(--text-color);
    margin-bottom: 0.25rem;
}

.stage-popup__subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.stage-popup__section-title {
    color: var(--accent-color);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.stage-popup__close {
    background: transparent;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    font-size: 1.1rem;
    transition: var(--transition);
    padding: 0.2rem;
    line-height: 1;
}

.stage-popup__close:hover,
.stage-popup__close:focus {
    color: var(--accent-color);
    transform: scale(1.15);
}

.stage-popup__text {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.stage-popup__list {
    list-style: none;
    margin: 0 0 1.5rem;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.stage-popup__list li {
    color: var(--text-light);
    font-size: 0.95rem;
}

.stage-popup__list strong {
    color: var(--text-color);
    font-weight: 600;
}

.stage-popup__actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.stage-popup__cta {
    flex: 1 1 auto;
    justify-content: center;
}

.stage-popup__dismiss {
    flex: 1 1 auto;
    justify-content: center;
}

/* ===== FORMULAIRE ===== */
.form {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    backdrop-filter: blur(10px);
}

.form__group {
    margin-bottom: 1.5rem;
}

.form__label {
    display: block;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.form__input,
.form__textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-color);
    font-family: inherit;
    font-size: var(--font-size-base);
    transition: var(--transition);
}

.form__input:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.1);
}

.form__textarea {
    resize: vertical;
    min-height: 120px;
}

.form__error {
    color: #ff6b6b;
    font-size: var(--font-size-sm);
    margin-top: 0.25rem;
    display: block;
    opacity: 0;
    transition: var(--transition);
}

.form__error.show {
    opacity: 1;
}

.form__success {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    background: rgba(46, 133, 95, 0.1);
    border: 1px solid rgba(46, 133, 95, 0.3);
    color: var(--accent-color);
    padding: 1rem;
    border-radius: var(--border-radius);
    text-align: center;
    margin-top: 1rem;
    opacity: 0;
    transform: translateY(10px);
    transition: var(--transition);
    width: 100%;
    max-width: 100%;
}

.form__success.show {
    display: flex;
    opacity: 1;
    transform: translateY(0);
}

.form__success i {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    display: block;
}

.contact__footer {
    text-align: center;
    margin-top: 4rem;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--dark-color);
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: 0; /* Pas de marge négative */
    position: relative;
    z-index: 2; /* Au-dessus de la vague */
}

.footer__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer__text p {
    color: var(--text-muted);
    margin: 0;
}

.footer__links {
    display: flex;
    gap: 2rem;
}

.footer__link {
    color: var(--text-muted);
    transition: var(--transition);
}

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

/* ===== BOUTON SCROLL TOP ===== */
.scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--accent-color);
    border: none;
    border-radius: 50%;
    color: var(--text-color);
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
    box-shadow: var(--shadow-medium);
}

.scroll-top.show {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: #026a4a;
    transform: translateY(-3px);
    box-shadow: var(--shadow-heavy);
}

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

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* ===== RESPONSIVE DESIGN ===== */

/* Tous les écrans mobiles et tablettes (jusqu'à 768px) - Timeline verticale et responsive général */
/* Optimisations pour mobile - réduire les animations */
@media (max-width: 768px) {
    /* Réduire les transitions pour améliorer les performances */
    .section__title,
    .section__subtitle,
    .project {
        transition-duration: 0.3s !important;
    }
    
    /* Optimiser les animations pour éviter les glitches */
    .section__title,
    .section__subtitle {
        will-change: auto; /* Retirer après animation */
    }
    /* Navigation mobile */
    .nav__menu {
        position: fixed;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--primary-color);
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-medium);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        z-index: 999;
    }
    
    .nav__menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav__toggle {
        display: block;
    }
    
    /* Timeline verticale pour tous les écrans mobiles */
    .timeline__items {
        flex-direction: column !important;
        gap: 3rem;
        padding-left: 40px;
        margin-top: 4rem;
        justify-content: flex-start;
    }
    
    .timeline__line {
        top: 0 !important;
        left: 20px !important;
        right: auto !important;
        width: 2px !important;
        height: 100% !important;
        transform: none !important;
    }
    
    .timeline__progress {
        width: 2px !important;
        height: 0;
        transition: height 0.5s ease;
    }
    
    .timeline__dot {
        left: -19px !important;
        top: 5px !important;
        transform: translate(0, 0) !important;
    }
    
    .timeline__item:hover .timeline__dot,
    .timeline__item.active .timeline__dot {
        transform: scale(1.2) !important;
        box-shadow: 0 0 20px var(--accent-color);
    }
    
    .timeline__item {
        max-width: none !important;
        text-align: left !important;
        flex: none !important;
        width: 100% !important;
    }
    
    .timeline__content {
        padding-top: 0 !important;
        padding-left: 0 !important;
        margin-top: 0 !important;
        opacity: 1 !important;
        transform: none !important;
        text-align: left !important;
    }
    
    .timeline__item:hover {
        transform: translateY(0) !important;
    }
    
    /* Projects en colonne */
    .project__content {
        grid-template-columns: 1fr !important;
        gap: 2rem;
    }
    
    .project:nth-child(even) .project__content {
        direction: ltr !important;
    }
    
    /* About en colonne */
    .about__container {
        grid-template-columns: 1fr !important;
        gap: 3rem;
    }
    
    /* Contact en colonne */
    .contact__container {
        grid-template-columns: 1fr !important;
        gap: 3rem;
    }
    
    /* Éviter que le header fixe ne recouvre le titre sur mobile/tablette */
    .home {
        padding-top: 80px;
    }
    .home__container {
        margin-top: 40px; /* pousse le bloc de titre sous le header */
    }
    
}

/* Tablettes grandes (769px - 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
    :root {
        --section-padding: 4rem 0;
        --font-size-xl: 3rem;
        --font-size-lg: 2.25rem;
    }
    
    .container {
        padding: 0 2rem;
    }
    
    .nav__menu {
        gap: 1.5rem;
    }
    
    .home__decoration {
        right: 5%;
        opacity: 0.18;
    }
    
    .home__circle {
        width: 250px;
        height: 250px;
    }
    
    .timeline__items {
        gap: 2rem;
    }
    
    .timeline__item {
        max-width: 180px;
    }
    
    .project__content {
        gap: 2.5rem;
    }
    
    .about__container {
        gap: 3.5rem;
    }
    
    .about__image {
        margin-top: 8rem;
    }
    
    .contact__container {
        gap: 3.5rem;
    }
    
    .skills__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Tablettes (481px - 768px) */
@media (min-width: 481px) and (max-width: 768px) {
    :root {
        --section-padding: 3rem 0;
        --font-size-xl: 2.5rem;
        --font-size-lg: 2rem;
        --font-size-md: 1.15rem;
    }
    
    .container {
        padding: 0 1.5rem;
    }
    
    .nav__menu {
        position: fixed;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--primary-color);
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-medium);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav__menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav__toggle {
        display: block;
    }
    
    .home__container {
        padding: 0 1.5rem;
    }
    
    .home__title {
        font-size: clamp(2rem, 6vw, 2.5rem);
    }
    
    .home__buttons {
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .home__title-name {
        font-size: 0.75em;
    }
    
    .home__title-role {
        font-size: 1.1em;
        margin-left: 0.3em;
    }
    
    .home__title-subtitle {
        font-size: 0.65em;
    }
    
    .home__decoration {
        display: none; /* Cache la décoration audio sur tablette */
    }
    
    .btn {
        width: auto;
        max-width: 280px;
        padding: 0.875rem 1.75rem;
    }
    
    .section__header {
        margin-bottom: 3rem;
    }
    
    .section__title {
        font-size: clamp(1.75rem, 5vw, 2rem);
    }
    
    .section__subtitle {
        font-size: 1rem;
    }
    
    /* Timeline déjà définie dans la media query générale max-width: 768px */
    .timeline__title {
        font-size: 1.15rem;
    }
    
    .timeline__date {
        font-size: 0.95rem;
    }
    
    .gallery__container {
        gap: 3rem;
    }
    
    .project__content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .project:nth-child(even) .project__content {
        direction: ltr;
    }
    
    .project__image {
        min-height: 280px;
    }
    
    .project__video {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    
    .project__title {
        font-size: 1.75rem;
    }
    
    .project__description {
        font-size: 1rem;
    }
    
    .about__container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .about__image--desktop {
        display: none;
    }
    
    .about__image--mobile {
        display: flex;
        margin-top: 0;
        margin-bottom: 2rem;
    }
    
    .about__image-container {
        max-width: 460px;
        margin: 0 auto;
    }
    
    .about__text p {
        font-size: 1rem;
    }
    
    .skills__grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 1.5rem;
    }
    
    .contact__container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .contact__wave {
        width: 250%;
        height: 250px;
        bottom: -30px;
    }
    
    .contact__info-items {
        margin-bottom: 2rem;
    }
    
    .contact__info-item {
        flex-direction: row;
        align-items: center;
    }
    
    .form {
        padding: 2rem;
    }
    
    .footer__content {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
    
    .footer__links {
        flex-direction: row;
        justify-content: flex-end;
    }
    
    .stage-popup {
        width: min(340px, calc(100% - 2.5rem));
        bottom: 1.5rem;
        right: 1.5rem;
        padding: 1.5rem;
    }
    
    .stage-popup__title {
        font-size: 1.2rem;
    }
    
    .stage-popup__subtitle {
        font-size: 0.9rem;
    }
    
    .stage-popup__section-title {
        font-size: 0.95rem;
    }
    
    .stage-popup__text,
    .stage-popup__list li {
        font-size: 0.9rem;
    }
}

/* Mobile (jusqu'à 480px) */
@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    :root {
        --section-padding: 2.5rem 0;
        --font-size-xl: 2rem;
        --font-size-lg: 1.75rem;
        --font-size-md: 1.1rem;
    }
    
    .nav {
        padding: 1rem;
    }
    
    .nav__logo-text {
        font-size: 1.25rem;
    }
    
    .nav__logo-icon {
        width: 28px;
        height: 28px;
    }
    
    .nav__menu {
        padding: 1.5rem;
    }
    
    .nav__item {
        margin-bottom: 0.75rem;
    }
    
    .nav__link {
        font-size: 1.1rem;
        padding: 0.75rem 0;
        display: block;
        width: 100%;
    }
    
    /* Images et vidéos responsive */
    img {
        max-width: 100%;
        height: auto;
    }
    
    video {
        max-width: 100%;
        height: auto;
    }
    
    .about__image img {
        width: 100%;
        max-width: 100%;
    }
    
    .home__container {
        padding: 0 1rem;
    }
    
    .home__title {
        font-size: clamp(1.5rem, 8vw, 2rem);
        margin-bottom: 1rem;
        line-height: 1.2;
    }
    
    .home__title-name {
        font-size: 0.7em;
        display: block;
        margin-bottom: 0.2em;
    }
    
    .home__title-role {
        font-size: 1em;
        display: block;
        margin-left: 0;
        margin-bottom: 0.3em;
    }
    
    .home__title-subtitle {
        font-size: 0.6em;
        margin-top: 0.5em;
    }
    
    .home__subtitle {
        font-size: 0.9rem;
        padding: 0 0.5rem;
        margin-bottom: 2rem;
    }
    
    .home__decoration {
        display: none;
    }
    
    .home__buttons {
        flex-direction: column;
        gap: 0.875rem;
        padding: 0 0.5rem;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        max-width: none;
        padding: 0.875rem 1.5rem;
        font-size: 0.9rem;
        justify-content: center;
    }
    
    /* Responsive vidéos et images */
    .project__video {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    
    .about__image--desktop {
        display: none;
    }
    
    .about__image--mobile {
        display: flex;
        margin-top: 0;
        margin-bottom: 1.5rem;
    }
    
    .about__image-container {
        max-width: 360px;
        margin: 0 auto;
    }
    
    /* Header mobile */
    .header {
        padding: 0.75rem 0;
    }
    
    /* Ajustement supplémentaire pour très petits écrans */
    .home {
        padding-top: 72px;
    }
    .home__container {
        margin-top: 56px; /* marge plus grande pour compenser le header + burger */
    }
    
    .section {
        padding: var(--section-padding);
    }
    
    .section__header {
        margin-bottom: 2rem;
        padding: 0 0.5rem;
    }
    
    .section__title {
        font-size: clamp(1.75rem, 6vw, 2rem);
    }
    
    .section__subtitle {
        font-size: 0.95rem;
    }
    
    /* Timeline mobile - déjà définie dans max-width: 768px mais ajustements spécifiques */
    .timeline__items {
        padding-left: 30px;
        gap: 2.5rem;
        margin-top: 3rem;
    }
    
    .timeline__line {
        left: 15px;
        width: 2px;
    }
    
    .timeline__dot {
        left: -14px;
        width: 12px;
        height: 12px;
    }
    
    .timeline__title {
        font-size: 1rem;
    }
    
    .timeline__date {
        font-size: 0.85rem;
    }
    
    .timeline__content {
        padding-top: 0;
    }
    
    .timeline__item {
        width: 100%;
    }
    
    /* Projects mobile */
    .gallery__container {
        gap: 2.5rem;
    }
    
    .gallery__footer {
        margin-top: 3rem;
        padding: 0 0.5rem;
    }
    
    .project__content {
        gap: 1.5rem;
    }
    
    .project__title {
        font-size: 1.4rem;
    }
    
    .project__category {
        font-size: 0.85rem;
    }
    
    .project__description {
        font-size: 0.9rem;
        line-height: 1.6;
    }
    
    .project__image {
        min-height: 220px;
    }
    
    #project-1 .project__image,
    #project-3 .project__image {
        min-height: 220px;
    }
    
    #project-4 .project__image img,
    #project-5 .project__image img {
        height: 220px;
    }
    
    .project__video {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    
    .project__tech {
        gap: 0.5rem;
    }
    
    .tech-tag {
        font-size: 0.75rem;
        padding: 0.4rem 0.8rem;
    }
    
    /* About mobile */
    .about__text {
        margin-bottom: 1.5rem;
    }
    
    .about__text p {
        font-size: 0.9rem;
        line-height: 1.7;
        margin-bottom: 1rem;
    }
    
    .about__cv {
        margin-top: 2rem;
        padding-top: 1.5rem;
    }
    
    .btn--cv {
        width: 100%;
        padding: 0.875rem 1.5rem;
        font-size: 0.95rem;
    }
    
    .skills__grid {
        grid-template-columns: 1fr !important;
        gap: 1rem;
    }
    
    .skill__item {
        padding: 0.875rem;
    }
    
    .skill__icon {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }
    
    .skill__name {
        font-size: 0.95rem;
    }
    
    .skill__description {
        font-size: 0.8rem;
    }
    
    /* Contact mobile */
    .contact__container {
        gap: 2rem;
    }
    
    .contact__info-title {
        font-size: 1.25rem;
        margin-bottom: 1.5rem;
    }
    
    .contact__info-item {
        margin-bottom: 1.5rem;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
    
    .contact__info-icon {
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
    }
    
    .contact__info-content h4 {
        font-size: 1rem;
    }
    
    .contact__info-content p {
        font-size: 0.9rem;
    }
    
    .contact__form {
        margin-top: 2rem;
    }
    
    .contact__wave {
        width: 300%;
        height: 180px;
        bottom: -15px;
    }
    
    .form {
        padding: 1.25rem;
    }
    
    .form__group {
        margin-bottom: 1.25rem;
    }
    
    .form__label {
        font-size: 0.9rem;
        margin-bottom: 0.4rem;
    }
    
    .form__input,
    .form__textarea {
        padding: 0.7rem 0.875rem;
        font-size: 0.9rem;
    }
    
    .form__textarea {
        min-height: 100px;
    }
    
    .btn--full {
        width: 100%;
        padding: 0.875rem 1.5rem;
    }
    
    .form__success {
        padding: 0.875rem;
        font-size: 0.9rem;
    }
    
    /* Footer mobile */
    .footer {
        padding: 1.5rem 0;
    }
    
    .footer__content {
        gap: 1rem;
    }
    
    .footer__text p {
        font-size: 0.85rem;
    }
    
    .footer__links {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .footer__link {
        font-size: 0.9rem;
    }
    
    .stage-popup {
        left: 1rem;
        right: 1rem;
        bottom: 1rem;
        width: auto;
        padding: 1.25rem;
    }
    
    .stage-popup__actions {
        flex-direction: column;
    }
    
    .stage-popup__cta,
    .stage-popup__dismiss {
        width: 100%;
    }
    
    .stage-popup__title {
        font-size: 1.1rem;
    }
    
    .stage-popup__subtitle {
        font-size: 0.85rem;
        margin-bottom: 0.75rem;
    }
    
    .stage-popup__section-title {
        font-size: 0.9rem;
        margin-bottom: 0.6rem;
    }
    
    .stage-popup__text {
        font-size: 0.85rem;
        margin-bottom: 1.1rem;
    }
    
    .stage-popup__list {
        gap: 0.35rem;
        margin-bottom: 1.25rem;
    }
    
    .stage-popup__list li {
        font-size: 0.85rem;
    }
    
    /* Scroll top mobile */
    .scroll-top {
        bottom: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
        font-size: 1rem;
    }
    
    /* Meta mobile */
    .project-detail__meta {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
        padding: 1.5rem;
    }
    
    .project-detail__meta-label {
        font-size: 0.75rem;
    }
    
    .project-detail__meta-value {
        font-size: 1rem;
    }
}

/* ===== ACCESSIBILITÉ ===== */
/* Focus visible pour la navigation au clavier */
.nav__link:focus,
.btn:focus,
.form__input:focus,
.form__textarea:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Réduction de mouvement pour les utilisateurs qui le préfèrent */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Mode sombre par défaut (déjà configuré) */
/* Le site utilise déjà un thème sombre par défaut */

/* ===== UTILITAIRES ===== */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

/* ===== OPTIMISATIONS PERFORMANCE ===== */
/* Lazy loading pour les images */
img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.3s;
}

img[loading="lazy"].loaded {
    opacity: 1;
}

/* Optimisation des transitions GPU */
.project__image,
.timeline__item,
.btn,
.nav__link {
    will-change: transform;
}

/* ===== FIN DU FICHIER CSS ===== */