/*
==========================================================
KARUKERAPP LAB
style.css
==========================================================
*/

:root{
    --primary:#8838b1;
    --secondary:#5e63ff;
    --accent:#7f5cff;
    --text:#1e293b;
    --text-light:#64748b;
    --white:#ffffff;
    --background:#f8fafc;
    --section1:#ffffff;
    --section2:#f8fafc;
    --section3:#cfc5f4;
    --border:#e5e7eb;

    /* Teintes dérivées de --primary (#8838b1) */
    --primary-soft:rgba(136,56,177,.08);
    --primary-glow:rgba(136,56,177,.22);
    --primary-glow-strong:rgba(136,56,177,.30);

    --shadow:0 8px 24px rgba(15,23,42,.05);
    --shadow-hover:0 20px 60px rgba(0,0,0,.12);

    --radius:18px;
    --container:1240px;
    --transition:.35s;

    /* Hauteur du header : sert d'ancrage au scroll */
    --header-height:100px;
}


/*************************************************
RESET
*************************************************/

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

html{
    scroll-behavior:smooth;
}

body{
    font-family:'Poppins',sans-serif;
    background:var(--background);
    color:var(--text);
    line-height:1.5;
    overflow-x:hidden;
}

img{
    display:block;
    max-width:100%;
    height:auto;
}

a{
    text-decoration:none;
    color:inherit;
}

ul{
    list-style:none;
}

button{
    font:inherit;
    color:inherit;
    background:none;
    border:0;
}

section,
footer{
    /* Remplace le scroll fluide géré en JS */
    scroll-margin-top:calc(var(--header-height) + 20px);
}

section{
    padding:120px 0;
}

.container{
    width:min(92%,var(--container));
    margin:auto;
}


/*************************************************
TYPOGRAPHIE
*************************************************/

h1{
    font-size:4rem;
    line-height:1.1;
    margin-bottom:30px;
    font-weight:800;
}

h2{
    font-size:2.8rem;
    line-height:1.1;
    margin-bottom:25px;
}

h3{
    font-size:1.45rem;
    margin-bottom:15px;
}

p{
    color:var(--text-light);
    margin-bottom:20px;
}

.section-title{
    text-align:center;
    max-width:700px;
    margin:auto auto 70px;
}

.subtitle{
    display:block;
    color:var(--primary);
    font-weight:700;
    letter-spacing:2px;
    text-transform:uppercase;
    margin-bottom:25px;
}


/*************************************************
BOUTONS
*************************************************/

.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:10px;
    padding:16px 34px;
    border-radius:999px;
    background:linear-gradient(135deg,
            var(--primary),
            var(--accent));
    color:var(--white);
    font-weight:600;
    transition:var(--transition);
    box-shadow:0 15px 40px var(--primary-glow);
}

.btn:hover{
    transform:translateY(-4px);
    box-shadow:0 22px 50px var(--primary-glow-strong);
}

.btn-outline{
    background:var(--white);
    color:var(--primary);
    border:2px solid var(--primary);
    box-shadow:none;
}

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

.btn-small{
    padding:12px 24px;
}


/*************************************************
HEADER
*************************************************/

header{
    position:fixed;
    background:rgba(255,255,255,.35);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    top:0;
    left:0;
    width:100%;
    z-index:1000;
    transition:.4s;
}

header.scrolled{
    background:rgba(255,255,255,.88);
    box-shadow:0 10px 40px rgba(0,0,0,.05);
}

header .container{
    height:var(--header-height);
    display:flex;
    align-items:center;
    justify-content:space-between;
}

.logo img{
    height:70px;
    width:auto;
}

nav ul{
    display:flex;
    gap:42px;
}

nav a{
    font-weight:500;
    position:relative;
}

nav a::after{
    content:"";
    position:absolute;
    left:0;
    bottom:-8px;
    width:0;
    height:2px;
    background:var(--primary);
    transition:.3s;
}

nav a:hover::after,
nav a.active::after{
    width:100%;
}

nav a.active{
    color:var(--primary);
}

body.menu-open{
    overflow:hidden;
}


/*************************************************
BURGER
*************************************************/

#burger{
    display:none;
    cursor:pointer;
    padding:6px;
}

#burger span{
    width:28px;
    height:3px;
    background:#111;
    display:block;
    margin:6px 0;
    border-radius:999px;
    transition:transform .3s, opacity .3s;
}

#burger.active span:nth-child(1){
    transform:translateY(9px) rotate(45deg);
}

#burger.active span:nth-child(2){
    opacity:0;
}

#burger.active span:nth-child(3){
    transform:translateY(-9px) rotate(-45deg);
}


/*************************************************
HERO
*************************************************/

#hero{
    min-height:100vh;
    display:flex;
    align-items:center;
    position:relative;
    overflow:hidden;
    padding-top:calc(var(--header-height) + 40px);
}

#hero::before{
    content:"";
    position:absolute;
    width:900px;
    height:900px;
    border-radius:50%;
    background:radial-gradient(
        color-mix(in srgb, var(--secondary) 12%, transparent),
        transparent 70%);
    top:-400px;
    right:-250px;
    pointer-events:none;
}

.hero-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:120px;
    align-items:center;
}

.hero-text{
    position:relative;
    z-index:2;
}

.hero-buttons{
    display:flex;
    gap:20px;
    margin-top:40px;
}

/*
    Le parallax est appliqué au conteneur,
    le flottement à l'image : les deux transforms
    ne se marchent plus dessus.
*/
.hero-image{
    position:relative;
    display:flex;
    justify-content:center;
    align-items:center;
    will-change:transform;
}

.hero-image img{
    width:560px;
    max-width:100%;
    filter:
        drop-shadow(0 40px 60px rgba(0,0,0,.15));
    animation:float 5s ease-in-out infinite;
}

@keyframes float{
    0%,100%{
        transform:translateY(0);
    }

    50%{
        transform:translateY(-15px);
    }
}


/*************************************************
LE STUDIO
*************************************************/

#studio{
    background:var(--section1);
    position:relative;
}

.cards{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:32px;
    margin-top:60px;
}

.cards article{
    background:var(--white);
    border-radius:var(--radius);
    padding:42px;
    border:1px solid var(--border);
    transition:var(--transition);
    box-shadow:var(--shadow);
    position:relative;
    overflow:hidden;
}

.cards article::before{
    content:"";
    position:absolute;
    top:0;
    left:0;
    width:5px;
    height:100%;
    background:linear-gradient(
        180deg,
        var(--primary),
        var(--accent)
    );
    transform:scaleY(0);
    transform-origin:top;
    transition:.35s;
}

.cards article:hover{
    transform:translateY(-12px);
    box-shadow:var(--shadow-hover);
}

.cards article:hover::before{
    transform:scaleY(1);
}

.cards h3{
    margin-bottom:18px;
}

.cards p{
    margin-bottom:0;
}


/*************************************************
EXPERTISE
*************************************************/

#expertise{
    background:var(--section2);
}

.services-grid{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:32px;
}

.services-grid > div{
    background:var(--white);
    padding:38px;
    border-radius:var(--radius);
    transition:var(--transition);
    border:1px solid var(--border);
    box-shadow:var(--shadow);
}

.services-grid > div:hover{
    transform:translateY(-10px);
    box-shadow:var(--shadow-hover);
}

.services-grid h3{
    color:var(--primary);
    margin-bottom:18px;
}

.services-grid p{
    margin-bottom:0;
}


/*************************************************
PROJETS
*************************************************/

#projects{
    background:linear-gradient(
        180deg,
        #fafbff 0%,
        #ffffff 100%
    );
    overflow:hidden;
}

.projects-grid{
    display:grid;
    grid-template-columns:5fr 7fr;
    gap:70px;
    align-items:center;
}

.projects-intro{
    max-width:430px;
}

.projects-intro .subtitle{
    margin-bottom:20px;
}

.projects-intro h2{
    margin-bottom:25px;
}

.projects-intro p{
    font-size:1.05rem;
    margin-bottom:0;
}

.projects-slider{
    position:relative;
}

.project-card{
    display:grid;
    grid-template-columns:280px 1fr;
    align-items:center;
    gap:50px;
    background:var(--white);
    border-radius:30px;
    padding:55px;
    border:1px solid rgba(0,0,0,.05);
    box-shadow:
        0 15px 45px rgba(15,23,42,.08),
        0 4px 12px rgba(15,23,42,.04);
    transition:
        transform .35s,
        box-shadow .35s,
        opacity .4s;
}

.project-card:hover{
    transform:translateY(-8px);
    box-shadow:
        0 28px 70px rgba(15,23,42,.12),
        0 8px 20px rgba(15,23,42,.08);
}

.project-image{
    display:flex;
    justify-content:center;
    align-items:center;
}

.project-image img{
    width:100%;
    max-width:250px;
    transition:.4s;
}

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

.project-content{
    display:flex;
    flex-direction:column;
    justify-content:center;
}

.project-content h3{
    font-size:2.4rem;
    margin:18px 0 15px;
}

.project-content p{
    font-size:1.08rem;
    max-width:420px;
    margin-bottom:20px;
}

.project-link{
    display:inline-flex;
    align-items:center;
    gap:8px;
    width:max-content;
    color:var(--primary);
    font-weight:600;
    border-bottom:2px solid transparent;
    padding-bottom:2px;
}

.project-link:hover{
    border-bottom-color:var(--primary);
}

.project-link[hidden]{
    display:none;
}


/*************************************************
BADGES
*************************************************/

.badge{
    display:inline-flex;
    align-items:center;
    width:max-content;
    padding:10px 18px;
    border-radius:999px;
    background:var(--primary-soft);
    color:var(--primary);
    font-weight:700;
    font-size:.9rem;
    letter-spacing:.5px;
}


/*************************************************
CONTACT-CTA
*************************************************/

#contact-cta{
    background:linear-gradient(
        135deg,
        var(--primary),
        var(--accent)
    );
    color:var(--white);
    text-align:center;
}

#contact-cta h2{
    color:var(--white);
    margin-bottom:40px;
    font-size:3rem;
}

#contact-cta p{
    color:rgba(255,255,255,.85);
}

#contact-cta .btn{
    background:var(--white);
    color:var(--primary);
    box-shadow:none;
}

#contact-cta .btn:hover{
    transform:translateY(-5px);
}


/*************************************************
FORMULAIRE DE CONTACT
*************************************************/

#contact{
    background:var(--section3);
}

.contact-form{
    max-width:760px;
    margin:auto;
    background:var(--white);
    border:1px solid var(--border);
    border-radius:var(--radius);
    box-shadow:var(--shadow);
    padding:50px;
    display:grid;
    gap:26px;
}

.form-row{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:26px;
}

.form-field{
    display:grid;
    gap:10px;
}

.form-field label{
    font-weight:600;
    font-size:.95rem;
    color:var(--text);
}

.form-optional{
    font-weight:400;
    font-size:.85rem;
    color:var(--text-light);
    margin-left:6px;
}

.form-field input,
.form-field textarea{
    font:inherit;
    color:var(--text);
    background:var(--background);
    border:1px solid var(--border);
    border-radius:12px;
    padding:15px 18px;
    width:100%;
    transition:border-color .25s, box-shadow .25s, background .25s;
}

.form-field textarea{
    resize:vertical;
    min-height:160px;
    line-height:1.6;
}

.form-field input:focus,
.form-field textarea:focus{
    outline:none;
    background:var(--white);
    border-color:var(--primary);
    box-shadow:0 0 0 4px var(--primary-soft);
}

/*
    Validation visuelle uniquement après saisie :
    :user-invalid n'entoure pas de rouge un champ
    que le visiteur n'a pas encore touché.
*/
.form-field input:user-invalid,
.form-field textarea:user-invalid{
    border-color:#dc2626;
}

.form-honeypot{
    position:absolute;
    left:-9999px;
    width:1px;
    height:1px;
    overflow:hidden;
}

.form-actions{
    display:flex;
    align-items:center;
    gap:24px;
    flex-wrap:wrap;
}

.form-actions .btn{
    flex:none;
}

.form-actions .btn[disabled]{
    opacity:.6;
    cursor:progress;
    transform:none;
    box-shadow:0 15px 40px var(--primary-glow);
}

.form-status{
    margin:0;
    font-weight:600;
    font-size:.95rem;
    flex:1 1 220px;
}

.form-status:empty{
    display:none;
}

.form-status[data-state="pending"]{
    color:var(--text-light);
}

.form-status[data-state="ok"]{
    color:#059669;
}

.form-status[data-state="error"]{
    color:#dc2626;
}


/*************************************************
RÉSEAUX SOCIAUX
*************************************************/

.socials{
    display:flex;
    gap:14px;
    margin-top:24px;
}

.socials a{
    display:grid;
    place-items:center;
    width:44px;
    height:44px;
    border-radius:50%;
    color:rgba(255,255,255,.72);
    background:rgba(255,255,255,.06);
    transition:background .3s, color .3s, transform .3s;
}

.socials a:hover{
    background:var(--primary);
    color:var(--white);
    transform:translateY(-3px);
}

.socials svg{
    display:block;
}


/*************************************************
APPARITION AU SCROLL

Masqué uniquement si le JS est actif (.js sur <html>),
sinon la page reste entièrement lisible.
*************************************************/

html.js .cards article,
html.js .services-grid > div,
html.js .project-card{
    opacity:0;
    transform:translateY(50px);
}

html.js .cards article.visible,
html.js .services-grid > div.visible,
html.js .project-card.visible{
    opacity:1;
    transform:translateY(0);
    transition:
        opacity .7s ease,
        transform .7s ease;
}

/* Doit rester APRÈS .visible : même spécificité, l'ordre tranche */
html.js .project-card.fade{
    opacity:0;
    transform:translateY(20px);
}


/*************************************************
FOOTER
*************************************************/

footer{
    background:#0f172a;
    color:var(--white);
    padding:90px 0 30px;
}

.footer-grid{
    display:grid;
    grid-template-columns:2fr 1fr 1fr;
    gap:60px;
    margin-bottom:70px;
}

.footer-logo{
    width:240px;
    height:auto;
    margin-bottom:25px;
    filter:brightness(1.05);
}

footer h4{
    margin-bottom:25px;
    font-size:1.1rem;
    color:var(--white);
}

footer p,
footer li,
footer a{
    color:rgba(255,255,255,.72);
}

footer ul li{
    margin-bottom:14px;
}

footer a:hover,
footer li:hover{
    color:var(--white);
}

.copyright{
    border-top:1px solid rgba(255,255,255,.08);
    padding-top:25px;
    text-align:center;
    color:rgba(255,255,255,.55);
    font-size:.95rem;
}


/*************************************************
TRANSITIONS GLOBALES
*************************************************/

a,
button{
    transition:.3s;
}

img{
    transition:.4s;
}


/*************************************************
FOCUS ACCESSIBILITÉ
*************************************************/

a:focus-visible,
button:focus-visible,
.project-card:focus-visible{
    outline:3px solid var(--primary);
    outline-offset:4px;
    border-radius:8px;
}


/*************************************************
RESPONSIVE — ≤ 1200px
*************************************************/

@media(max-width:1200px){

    h1{
        font-size:3.3rem;
    }

    .hero-grid{
        gap:50px;
    }

    .projects-grid{
        gap:50px;
    }

    .project-card{
        grid-template-columns:220px 1fr;
        gap:40px;
    }

}


/*************************************************
RESPONSIVE — ≤ 992px
Bascule tablette + passage au menu mobile
*************************************************/

@media(max-width:992px){

    section{
        padding:90px 0;
    }

    h1{
        font-size:2.8rem;
    }

    h2{
        font-size:2.2rem;
    }

    .hero-grid{
        grid-template-columns:1fr;
        text-align:center;
    }

    .hero-buttons{
        justify-content:center;
        flex-wrap:wrap;
    }

    .cards{
        grid-template-columns:1fr;
    }

    .services-grid{
        grid-template-columns:1fr;
    }

    .projects-grid{
        grid-template-columns:1fr;
        gap:50px;
    }

    .projects-intro{
        max-width:100%;
        text-align:center;
    }

    .project-card{
        grid-template-columns:1fr;
        text-align:center;
        padding:45px;
    }

    .project-content{
        align-items:center;
    }

    .project-content p{
        max-width:100%;
    }

    .footer-grid{
        grid-template-columns:1fr;
        text-align:center;
    }

    .footer-logo{
        margin:auto auto 25px;
    }

    .socials{
        justify-content:center;
    }

    .contact-form{
        padding:40px;
    }


    /* ---------------------------------------
       MENU MOBILE

       backdrop-filter neutralisé ici :
       un élément filtré devient bloc conteneur
       pour ses descendants en position:fixed,
       ce qui empêchait le nav de couvrir l'écran.
    --------------------------------------- */

    header,
    header.scrolled{
        backdrop-filter:none;
        -webkit-backdrop-filter:none;
        background:rgba(255,255,255,.96);
    }

    nav{
        position:fixed;
        inset:0;
        background:var(--white);
        display:flex;
        justify-content:center;
        align-items:center;
        transform:translateX(100%);
        visibility:hidden;
        transition:transform .45s, visibility .45s;
        z-index:999;
    }

    nav.active{
        transform:translateX(0);
        visibility:visible;
    }

    nav ul{
        flex-direction:column;
        text-align:center;
        gap:45px;
    }

    nav a{
        font-size:1.4rem;
    }

    #burger{
        display:block;
        z-index:1001;
    }

    header .btn{
        display:none;
    }

}


/*************************************************
RESPONSIVE — ≤ 768px
*************************************************/

@media(max-width:768px){

    section{
        padding:80px 0;
    }

    h1{
        font-size:2.3rem;
    }

    h2{
        font-size:1.9rem;
    }

    p{
        font-size:.98rem;
    }

    .hero-image img{
        width:320px;
    }

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

    .btn{
        width:100%;
        max-width:320px;
    }

    .project-card{
        padding:35px;
    }

    .project-image img{
        max-width:180px;
    }

    .project-content h3{
        font-size:2rem;
    }

    .form-row{
        grid-template-columns:1fr;
    }

    .contact-form{
        padding:30px;
    }

    .form-actions{
        flex-direction:column;
        align-items:stretch;
        text-align:center;
    }

    .form-actions .btn{
        width:100%;
        max-width:none;
    }

}


/*************************************************
RESPONSIVE — ≤ 480px
*************************************************/

@media(max-width:480px){

    .container{
        width:90%;
    }

    h1{
        font-size:2rem;
    }

    h2{
        font-size:1.7rem;
    }

    .cards article,
    .services-grid > div{
        padding:30px;
    }

    .projects-grid{
        gap:35px;
    }

    .project-card{
        padding:25px;
        border-radius:22px;
    }

    .project-image img{
        max-width:150px;
    }

    .project-content h3{
        font-size:1.7rem;
    }

    .hero-image img{
        width:260px;
    }

    .contact-form{
        padding:24px;
        gap:20px;
    }

}


/*************************************************
REDUCE MOTION
*************************************************/

@media(prefers-reduced-motion:reduce){

    *,
    *::before,
    *::after{
        animation-duration:.01ms!important;
        animation-iteration-count:1!important;
        transition-duration:.01ms!important;
        scroll-behavior:auto!important;
    }

    /* Le contenu doit rester visible sans transition */
    html.js .cards article,
    html.js .services-grid > div,
    html.js .project-card{
        opacity:1;
        transform:none;
    }

}