body{
    margin:0;
    font-family: "Segoe UI", Arial, sans-serif;
    color:#222;
    background:#fff;
}

/* HEADER */
header{
    background:#304992;
    position:sticky;
    top:0;
    z-index:1000;
    padding:0 10px;
}

/* NAV */
.nav{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:0;
}

/* TITLE */
.title{
    color:#ffffff;
    font-weight:600;
    letter-spacing:2px;
    text-decoration:none;
}

/* MENU */
nav a{
    margin-left:15px;
    text-decoration:none;
    color:#ffffff;
    font-size:16px;
}

nav a:hover{
    color:#00b4d8;
}

nav a.active{
    color:#00b4d8;
    border-bottom:2px solid #00b4d8;
}

/* CONTAINER */
.container{
    width:90%;
    max-width:1100px;
    margin:auto;
    padding:40px 0;
}

/* HERO */
.hero img{
    width:100%;
    height:auto;
    display:block;
}

/* TITLES */
h2{
    font-size:22px;
    margin-bottom:15px;
    border-left:4px solid #00b4d8;
    padding-left:10px;
}

/* TEXT */
p, li{
    line-height:1.6;
    font-size:15px;
}

/* LIST */
ul{
    padding-left:20px;
}

/* GRID */
.grid{
    display:grid;
    grid-template-columns:repeat(auto-fit, minmax(220px, 1fr));
    gap:20px;
    justify-items:stretch;
}

/* CARD */
.card{
    background:#ffffff;
    border-radius:14px;
    padding:18px;
    box-shadow:0 5px 18px rgba(0,0,0,0.08);
    transition:0.3s ease;
    text-align:left;
}

.card:hover{
    transform:translateY(-5px);
}

.card h3{
    color:#304992;
    font-size:16px;
    margin-bottom:10px;
}

.card p{
    margin-bottom:10px;
    line-height:1.5;
}

.card strong{
    color:#1f2a44;
}

.card ul li{
    margin-bottom:6px;
}

/* SPEAKERS */
.card img{
    width:100%;
    height:220px;
    object-fit:cover;
    border-radius:8px;
    margin-bottom:10px;
}

.card h3 a{
    text-decoration:none;
    color:#304992;
}

.card h3 a:hover{
    color:#00b4d8;
}

.affiliation{
    font-size:13px;
    font-style:italic;
    margin-bottom:10px;
    color:#555;
}

.bio{
    display:none;
    margin-top:10px;
    font-size:14px;
    line-height:1.6;
    color:#444;
}

.speaker-card{
    cursor:pointer;
}

.speaker-card.active .bio{
    display:block;
}

/* CONTACT */
.contact-card p{
    display:flex;
    align-items:center;
    gap:10px;
    margin:10px 0;
}

.contact-card i{
    color:#304992;
    width:18px;
}

.contact-card a{
    text-decoration:none;
    color:#304992;
}

.contact-card a:hover{
    text-decoration:underline;
}

/* SPONSORS */
.sponsor-slider{
    overflow:hidden;
    padding:25px 0;
}

.sponsor-track{
    display:flex;
    gap:60px;
    align-items:center;
    animation:scroll 18s linear infinite;
    width:max-content;
}

.sponsor-track img{
    height:90px;
    width:auto;
    object-fit:contain;
    transition:transform 0.3s ease;
}

.sponsor-track img:hover{
    transform:scale(1.15);
}

@keyframes scroll{
    0%{
        transform:translateX(0);
    }

    100%{
        transform:translateX(-50%);
    }
}

/* REGISTER & DOWNLOAD SECTION */

.cta-section{
    padding:80px 8%;
    background:linear-gradient(to bottom, #f5f9ff, #ffffff);
}

.cta-container{
    display:grid;
    grid-template-columns:repeat(auto-fit, minmax(260px, 1fr));
    gap:30px;
}

.cta-card{
    position:relative;
    background:#ffffff;
    border-radius:22px;
    padding:35px 28px;
    text-align:center;
    overflow:hidden;
    box-shadow:0 10px 30px rgba(0,0,0,0.08);
    transition:0.4s ease;
    border:1px solid rgba(0,119,255,0.08);
}

.cta-card:hover{
    transform:translateY(-10px);
    box-shadow:0 18px 40px rgba(0,0,0,0.15);
}

.cta-card h2,
.cta-card h3{
    color:#003366;
    margin-bottom:18px;
}

.cta-card h2{
    font-size:2rem;
}

.cta-card h3{
    font-size:1.4rem;
}

.cta-card p{
    color:#555;
    line-height:1.7;
    margin-bottom:25px;
}

.icon{
    font-size:3rem;
    margin-bottom:18px;
}

/* REGISTER CARD */

.register-card{
    background:linear-gradient(135deg, #003366, #0059b3);
    color:white;
}

.register-card h2,
.register-card p{
    color:white;
}

/* REGISTER BUTTON */

.register-btn{
    display:inline-block;
    padding:16px 38px;
    background:#7CFC00;
    color:#003366;
    text-decoration:none;
    font-weight:bold;
    border-radius:50px;
    font-size:1.1rem;
    letter-spacing:1px;
    animation:blinkPulse 1.4s infinite;
    transition:0.3s ease;
}

.register-btn:hover{
    transform:scale(1.08);
    background:white;
}

@keyframes blinkPulse{

    0%{
        box-shadow:0 0 0 rgba(124,252,0,0.7);
        opacity:1;
    }

    50%{
        box-shadow:0 0 25px rgba(124,252,0,1);
        opacity:0.85;
    }

    100%{
        box-shadow:0 0 0 rgba(124,252,0,0.7);
        opacity:1;
    }
}

/* DOWNLOAD BUTTON */

.download-btn{
    display:inline-block;
    padding:13px 28px;
    background:linear-gradient(135deg, #0077ff, #00bfff);
    color:white;
    text-decoration:none;
    border-radius:40px;
    font-weight:600;
    transition:0.3s ease;
}

.download-btn:hover{
    transform:scale(1.06);
    box-shadow:0 10px 25px rgba(0,119,255,0.3);
}

/* PULSE EFFECT */

.pulse-ring{
    position:absolute;
    width:220px;
    height:220px;
    border-radius:50%;
    background:rgba(124,252,0,0.08);
    top:-70px;
    right:-70px;
    animation:pulse 3s infinite;
}

@keyframes pulse{

    0%{
        transform:scale(1);
        opacity:0.6;
    }

    50%{
        transform:scale(1.15);
        opacity:0.25;
    }

    100%{
        transform:scale(1);
        opacity:0.6;
    }
}

/* =========================
   ACCORDION COMMITTEES
========================= */

.accordion{
    margin-bottom:15px;
    border:1px solid #e5e5e5;
    border-radius:12px;
    overflow:hidden;
    background:white;
    box-shadow:0 4px 15px rgba(0,0,0,0.06);
}

/* BUTTON */

.accordion-btn{
    width:100%;
    background:#304992;
    color:white;
    padding:16px 20px;
    font-size:16px;
    font-weight:600;
    border:none;
    cursor:pointer;

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

    transition:0.3s ease;
}

.accordion-btn:hover{
    background:#00b4d8;
}

/* ICON */

.accordion-btn .icon{
    font-size:22px;
    font-weight:bold;
    color:white;
}

/* CONTENT */

.accordion-content{
    max-height:0;
    overflow:hidden;
    transition:max-height 0.4s ease;
    background:#f9fbff;
    padding:0 20px;
}

.accordion-content p{
    margin:14px 0;
    font-size:15px;
    line-height:1.6;
    color:#333;
}


/* MAP */

iframe{
    width:100%;
    height:300px;
    border:0;
    margin-top:10px;
    border-radius:10px;
}

/* =========================
   FOOTER
========================= */

footer{
    background:#1f2a44;
    color:#ffffff;
    padding:20px 10px;
    margin-top:50px;
}

/* container footer */
.footer{
    display:flex;
    justify-content:space-between;
    align-items:center;
    gap:30px;
    flex-wrap:wrap;
}

/* colonnes */
.footer-col{
    flex:1;
}

.footer-col h3{
    font-size:16px;
    margin-bottom:15px;
}

/* logos gauche */
.logos{
    text-align:left;
}

/* contact centré */
.contact{
    text-align:center;
}

/* logos */
.footer-logos{
    display:flex;
    gap:10px;
    align-items:center;
}

.footer-logos img{
    height:45px;
    background:#fff;
    padding:5px;
    border-radius:6px;
}

/* texte contact */
.footer-col p{
    margin:3px 0;
    white-space:nowrap;
}

/* copyright sur nouvelle ligne */
.copy{
    width:100%;
    text-align:center;
    font-size:13px;
    margin-top:25px;
    opacity:0.8;
    border-top:1px solid rgba(255,255,255,0.2);
    padding-top:15px;
}

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

@media(max-width:768px){

    .nav{
        flex-direction:column;
        gap:10px;
    }

    .footer{
        flex-direction:column;
        text-align:center;
        gap:20px;
    }

    .logos,
    .contact{
        text-align:center;
    }

    .footer-logos{
        justify-content:center;
        flex-wrap:wrap;
    }

    .footer-col p{
        white-space:normal;
    }

    .cta-section{
        padding:60px 5%;
    }

    .cta-card{
        padding:30px 22px;
    }

    .cta-card h2{
        font-size:1.7rem;
    }
}