* {margin:0; padding:0; box-sizing:border-box;}
body, html {
    height: 100%;
    font-family: 'Poppins', sans-serif;
    color: #fff;
}

/* Background fullscreen */
body {
    background: url('/client/img/client-accueil-bg.jpg') no-repeat center center;
    background-size: cover;
    text-align: left;
    padding: 24px clamp(16px, 4vw, 64px) 24px clamp(32px, 8vw, 120px);
    /* top  right  bottom  left  -> marge gauche plus généreuse */
}

body.flex{
    display: flex;
    justify-content: flex-start;                     /* à gauche */
    align-items: center;
}

.hero { max-width: 625px; width: 100%; }

.hero h1 {
    font-size: 55px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
}
.hero h1 .color-fcs { color: #d5dd02; } /* ton vert FCS */

.hero p {
    font-size: 20px;
    line-height: 1.4;
    font-weight: 300;
    margin-bottom: 30px;
    max-width: 600px;
}

/* Champ téléphone + bouton */
.input-with-button {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    max-width: 480px;
    height: 56px;
    border: 2px solid #fff;
    border-radius: 15px;
    background: rgba(0,0,0,0.35);
    backdrop-filter: blur(4px);
    overflow: hidden;
}
.input-with-button input {
    width: 100%;
    height: 100%;
    border: none;
    outline: none;
    padding: 0 18px;
    background: transparent;
    color: #fff;
    font-size: 1rem;
}
.input-with-button input::placeholder {
    color: rgba(255,255,255,0.7);
    font-style: italic;
}
.input-with-button button {
    width: 56px;
    height: 56px;
    border: none;
    border-radius: 0px;
    background: #fff;
    color: #000;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all .3s;
}
.input-with-button button:hover {
    background: #d5dd02;
    color: #000;
    transform: scale(1.05);
}

/* Responsive */
@media(max-width:768px){
    .hero h1 { font-size: 36px; }
    .hero p { font-size: 16px; }
}
@media(max-width:480px){
    .hero h1 { font-size: 28px; }
    .input-with-button { height: 50px; }
    .input-with-button button { width: 50px; height: 50px; font-size: 1rem; }
}

.flash-fixed{position:fixed; top:16px; left:16px; right:16px; z-index:9999;}
.flash-fixed .alert{margin:0 0 8px;}