* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    width: 100%;
    min-height: 100%;
}

body {
    background: #f7f9fc;
    color: #253746;

    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.5;
}


/* PAGE */

.adhesion-page {
    width: min(850px, calc(100% - 40px));

    margin: 0 auto;
    padding: 40px 0 60px;
}


/* CARTE */

.adhesion-card {
    overflow: hidden;

    background: #ffffff;

    border: 1px solid #dce5ec;
    border-radius: 14px;

    box-shadow: 0 5px 20px rgba(30, 60, 80, 0.08);
}


/* EN-TÊTE */

.adhesion-header {
    padding: 30px 35px;

    background: linear-gradient(
        135deg,
        #e7f2fa 0%,
        #f6fafd 100%
    );

    border-bottom: 1px solid #dce5ec;
}

.eyebrow {
    margin: 0 0 5px;

    color: #3184b8;

    font-size: 12px;
    font-weight: 700;

    letter-spacing: 2px;
    text-transform: uppercase;
}

.adhesion-header h1 {
    margin: 0;

    color: #173f5f;

    font-size: 30px;
    line-height: 1.2;
}

.adhesion-header > p:last-child {
    max-width: 600px;

    margin: 10px 0 0;

    color: #657784;

    font-size: 14px;
}


/* FORMULAIRE */

.adhesion-form {
    padding: 32px 35px 38px;
}


/* SECTIONS */

fieldset {
    margin: 0 0 30px;
    padding: 25px;

    border: 1px solid #dce5ec;
    border-radius: 10px;

    background: #ffffff;
}

legend {
    padding: 0 10px;

    color: #176b9e;

    font-size: 17px;
    font-weight: 700;
}


/* GRILLE */

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

    gap: 18px;
}

.postal-row {
    grid-template-columns: 160px minmax(0, 1fr);
}


/* CHAMPS */

.form-group {
    display: flex;
    flex-direction: column;

    margin-bottom: 18px;
}

.form-group label {
    margin-bottom: 7px;

    color: #354d5e;

    font-size: 14px;
    font-weight: 700;
}

.form-group label span,
.required-note span {
    color: #176b9e;
}


/* INPUTS */

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;

    padding: 11px 13px;

    background: #ffffff;

    border: 1px solid #cdd9e1;
    border-radius: 8px;

    color: #253746;

    font-family: Arial, Helvetica, sans-serif;
    font-size: 15px;

    outline: none;

    transition:
        border-color 0.15s ease,
        box-shadow 0.15s ease;
}

.form-group select {
    cursor: pointer;
}

.form-group textarea {
    min-height: 140px;
    resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: #3184b8;

    box-shadow: 0 0 0 3px rgba(49, 132, 184, 0.12);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #9aa8b2;
}


/* DATE DE NAISSANCE */

.birth-date {
    display: grid;
    grid-template-columns: 60px 15px 60px 15px 90px;

    align-items: center;

    gap: 5px;
}

.birth-date span {
    color: #71808b;
    text-align: center;
}


/* TAUX */

.small-field {
    max-width: 400px;
}

.input-suffix {
    display: flex;
    align-items: center;

    gap: 10px;
}

.input-suffix input {
    max-width: 120px;
}

.input-suffix span {
    color: #526573;

    font-size: 15px;
    font-weight: 700;
}


/* CHECKBOXES */

.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);

    gap: 10px;
}

.checkbox-option {
    display: flex;
    align-items: center;

    gap: 8px;

    margin: 0 !important;
    padding: 10px 12px;

    background: #f7f9fc;

    border: 1px solid #dce5ec;
    border-radius: 8px;

    color: #354d5e;

    font-size: 14px;
    font-weight: 600;

    cursor: pointer;

    transition:
        background 0.15s ease,
        border-color 0.15s ease;
}

.checkbox-option:hover {
    background: #edf6fb;
    border-color: #bfd8e8;
}

.checkbox-option input {
    width: auto;
    margin: 0;

    accent-color: #176b9e;
}


/* CHAMPS OBLIGATOIRES */

.required-note {
    margin: -10px 0 22px;

    color: #71808b;

    font-size: 12px;
}


/* ENVOI */

.submit-area {
    text-align: center;
}

button {
    display: inline-flex;

    align-items: center;
    justify-content: center;

    min-width: 260px;

    padding: 13px 22px;

    background: #176b9e;

    border: 0;
    border-radius: 8px;

    color: #ffffff;

    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    font-weight: 700;

    cursor: pointer;

    transition:
        background 0.15s ease,
        transform 0.15s ease,
        box-shadow 0.15s ease;
}

button:hover {
    background: #0d5c8d;

    transform: translateY(-1px);

    box-shadow: 0 4px 12px rgba(23, 107, 158, 0.22);
}

button:active {
    transform: translateY(0);
}


/* MOBILE */

@media (max-width: 700px) {

    .adhesion-page {
        width: calc(100% - 20px);

        padding: 20px 0 40px;
    }

    .adhesion-header {
        padding: 24px 20px;
    }

    .adhesion-header h1 {
        font-size: 26px;
    }

    .adhesion-form {
        padding: 22px 15px 28px;
    }

    fieldset {
        padding: 20px 15px;
    }

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

        gap: 0;
    }

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

    .birth-date {
        grid-template-columns: 55px 10px 55px 10px 85px;
    }

    button {
        width: 100%;
        min-width: 0;
    }
}


@media (max-width: 400px) {

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