/* Police : Source Sans 3 (Source Sans Pro successeur) via Google Fonts. Chargée depuis index.html avec preload/preconnect pour de meilleures performances */

body {
    font-family: 'Source Sans 3', 'Source Sans Pro', Arial, sans-serif;
    background-color: #f9f9f9;
    color: #333;
    padding-top: 60px;
}

.navbar {
    background: linear-gradient(to right, #1D809F, #0f4f5a); /* couleur principale #1D809F */
}

.navbar-brand {
    font-weight: 700;
    color: #fff !important;
}

.container {
    max-width: 800px;
}

.bmi-card {
    border-radius: 12px;
    box-shadow: 0 6px 18px rgba(13, 13, 13, 0.08);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    border: none;
}

.bmi-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 10px 30px rgba(13, 13, 13, 0.12);
}

.result-area {
    min-height: 100px;
    border-radius: 10px;
    background-color: #ffffff;
    transition: all 0.25s ease;
    border: 1px solid #e9eef0;
}

.result-area.has-result {
    background-color: #f0fbff;
    border-left: 6px solid #1D809F;
}

#bmiValue {
    font-size: 2rem;
    font-weight: 700;
    color: #1D809F;
}

#bmiCategory {
    font-size: 1.1rem;
    font-weight: 600;
}

footer {
    background: linear-gradient(to right, #0f4f5a, #1D809F);
    color: #fff;
    padding: 20px 0;
    margin-top: 50px;
}

.btn-gradient {
    background: linear-gradient(to right, #1D809F, #0f4f5a);
    border: none;
    color: white;
}

.btn-gradient:hover {
    background: linear-gradient(to right, #0f4f5a, #1D809F);
    color: white;
}

.bmi-chart {
    border-radius: 10px;
    overflow: hidden;
    margin-top: 30px;
}

.bmi-chart .table {
    margin-bottom: 0;
}

/* couleurs plus douces pour les catégories */
.bmi-underweight { background-color: #cfeffd; }
.bmi-normal { background-color: #dff5e8; }
.bmi-overweight { background-color: #fff4cc; }
.bmi-obese { background-color: #ffe3d0; }

.invalid-feedback {
    color: #dc3545;
    font-size: 0.875rem;
}

.is-invalid {
    border-color: #dc3545;
}

.healthy-range {
    background-color: #e9f7fa;
    border-radius: 8px;
    padding: 10px;
    margin-top: 15px;
    border: 1px solid rgba(29,128,159,0.08);
}

.progress {
    height: 20px;
    margin-top: 10px;
    background-color: #e9eef0;
}

.progress-bar {
    transition: width 1s ease-in-out;
}

/* Correction d'affichage mobile */
@media (max-width: 576px) {
    body { padding-top: 70px; }
    .container { padding: 0 12px; }
    #bmiValue { font-size: 1.6rem; }
}