:root {
    --bleu: #1a3a5c;
    --bleu-clair: #2563a8;
    --or: #c8972a;
    --fond: #f5f3ee;
    --blanc: #ffffff;
    --gris: #6b7280;
    --gris-clair: #e8e4dc;
    --rouge: #c0392b;
    --vert: #1a7a4a;
}

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

body {
    font-family: 'Source Sans 3', sans-serif;
    background: var(--fond);
    color: var(--bleu);
    min-height: 100vh;
}

/* ===== HEADER ===== */
header {
    background: var(--bleu);
    padding: 18px 32px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 3px solid var(--or);
}

header .logo-icon {
    width: 38px;
    height: 38px;
    background: var(--or);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

header h1 {
    font-family: 'Playfair Display', serif;
    font-size: 1.6rem;
    color: var(--blanc);
    letter-spacing: -0.5px;
}

header h1 span {
    color: var(--or);
}

header p {
    margin-left: auto;
    color: #aac4e8;
    font-size: 0.85rem;
}

/* ===== LAYOUT GÉNÉRAL ===== */
.page {
    display: grid;
    grid-template-columns: 200px 1fr 200px;
    gap: 24px;
    max-width: 1200px;
    margin: 32px auto;
    padding: 0 16px;
    align-items: start;
}

/* ===== BANDES PUB LATÉRALES ===== */
.pub-lateral {
    background: var(--blanc);
    border: 2px dashed var(--gris-clair);
    border-radius: 12px;
    padding: 16px;
    text-align: center;
    min-height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    position: sticky;
    top: 24px;
}

.pub-lateral .pub-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--gris);
    background: var(--gris-clair);
    padding: 3px 8px;
    border-radius: 4px;
}

.pub-lateral .pub-visuel {
    width: 100%;
    height: 250px;
    background: linear-gradient(135deg, #dce8f7 0%, #eef4fb 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 8px;
    color: var(--bleu-clair);
    font-size: 0.8rem;
}

.pub-lateral .pub-visuel span {
    font-size: 2rem;
}

.pub-lateral .pub-cta {
    display: inline-block;
    background: var(--bleu-clair);
    color: var(--blanc);
    font-size: 0.75rem;
    padding: 6px 14px;
    border-radius: 20px;
    text-decoration: none;
    font-weight: 600;
}

/* ===== COLONNE CENTRALE ===== */
.centre {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* ===== BLOC SIMULATEUR ===== */
.bloc-simulateur {
    background: var(--blanc);
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(26, 58, 92, 0.1);
    overflow: hidden;
}

.bloc-simulateur .bloc-header {
    background: var(--bleu);
    padding: 24px 28px;
    border-bottom: 3px solid var(--or);
}

.bloc-simulateur .bloc-header h2 {
    font-family: 'Playfair Display', serif;
    font-size: 1.3rem;
    color: var(--blanc);
}

.bloc-simulateur .bloc-header p {
    color: #aac4e8;
    font-size: 0.85rem;
    margin-top: 4px;
}

.bloc-simulateur .bloc-corps {
    padding: 28px;
}

/* Champs */
.champ {
    margin-bottom: 20px;
}

.champ label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--bleu);
    margin-bottom: 6px;
}

.champ label span {
    font-weight: 400;
    color: var(--gris);
    font-size: 0.8rem;
    margin-left: 6px;
}

.champ input,
.champ select {
    width: 100%;
    padding: 12px 14px;
    border: 2px solid var(--gris-clair);
    border-radius: 8px;
    font-size: 1rem;
    font-family: 'Source Sans 3', sans-serif;
    color: var(--bleu);
    background: #fafaf8;
    transition: border-color 0.2s;
    outline: none;
}

.champ input:focus,
.champ select:focus {
    border-color: var(--bleu-clair);
    background: var(--blanc);
}

/* Toggle mensuel / annuel */
.toggle-periode {
    display: flex;
    gap: 0;
    border: 2px solid var(--gris-clair);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 20px;
}

.toggle-periode button {
    flex: 1;
    padding: 10px;
    border: none;
    background: #fafaf8;
    font-family: 'Source Sans 3', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gris);
    cursor: pointer;
    transition: all 0.2s;
}

.toggle-periode button.actif {
    background: var(--bleu);
    color: var(--blanc);
}

/* Nb parts */
.parts-input {
    display: flex;
    align-items: center;
    gap: 0;
    border: 2px solid var(--gris-clair);
    border-radius: 8px;
    overflow: hidden;
}

.parts-input button {
    width: 44px;
    height: 44px;
    border: none;
    background: var(--gris-clair);
    font-size: 1.3rem;
    color: var(--bleu);
    cursor: pointer;
    font-weight: 700;
    transition: background 0.2s;
    flex-shrink: 0;
}

.parts-input button:hover {
    background: #d5d0c8;
}

.parts-input input {
    border: none !important;
    border-left: 2px solid var(--gris-clair) !important;
    border-right: 2px solid var(--gris-clair) !important;
    border-radius: 0 !important;
    text-align: center;
    font-weight: 600;
    font-size: 1.1rem;
    background: #fafaf8 !important;
}

/* Bouton simuler */
.btn-simuler {
    width: 100%;
    padding: 15px;
    background: var(--or);
    color: var(--blanc);
    border: none;
    border-radius: 10px;
    font-family: 'Playfair Display', serif;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    letter-spacing: 0.3px;
    transition: background 0.2s, transform 0.1s;
    margin-top: 8px;
}

.btn-simuler:hover {
    background: #b07d1e;
    transform: translateY(-1px);
}

.btn-simuler:active {
    transform: translateY(0);
}

/* ===== BLOC RÉSULTATS ===== */
.bloc-resultats {
    background: var(--blanc);
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(26, 58, 92, 0.1);
    overflow: hidden;
    display: none;
    animation: apparait 0.4s ease;
}

@keyframes apparait {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.bloc-resultats .bloc-header {
    background: var(--vert);
    padding: 20px 28px;
}

.bloc-resultats .bloc-header h2 {
    font-family: 'Playfair Display', serif;
    font-size: 1.2rem;
    color: var(--blanc);
}

.bloc-resultats .bloc-corps {
    padding: 28px;
}

/* Montant principal */
.montant-principal {
    text-align: center;
    padding: 24px;
    background: linear-gradient(135deg, #f0f7f2 0%, #e6f4ec 100%);
    border-radius: 12px;
    border: 2px solid #b8dfc8;
    margin-bottom: 24px;
}

.montant-principal .label {
    color: var(--gris);
    font-size: 0.9rem;
}

.montant-principal .montant {
    font-family: 'Playfair Display', serif;
    font-size: 2.4rem;
    color: var(--vert);
    font-weight: 700;
    margin: 4px 0;
}

.montant-principal .sous-label {
    color: var(--gris);
    font-size: 0.8rem;
}

/* Lignes de détail */
.detail-ligne {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--gris-clair);
    font-size: 0.92rem;
}

.detail-ligne:last-of-type {
    border-bottom: none;
}

.detail-ligne .libelle {
    color: var(--bleu);
}

.detail-ligne .valeur {
    font-weight: 600;
    color: var(--bleu);
}

.detail-ligne .valeur.negatif {
    color: var(--rouge);
}

.detail-ligne .valeur.positif {
    color: var(--vert);
}

/* Taux effectif */
.taux-barre {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 2px solid var(--gris-clair);
}

.taux-barre .taux-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.barre-fond {
    height: 10px;
    background: var(--gris-clair);
    border-radius: 10px;
    overflow: hidden;
}

.barre-rempli {
    height: 100%;
    background: linear-gradient(90deg, var(--vert), var(--or));
    border-radius: 10px;
    transition: width 0.8s ease;
}

/* Message don */
.message-don {
    margin-top: 20px;
    padding: 16px 20px;
    background: linear-gradient(135deg, #fff8e6 0%, #fef3cc 100%);
    border-left: 4px solid var(--or);
    border-radius: 0 10px 10px 0;
    font-size: 0.88rem;
    color: #6b4d00;
    line-height: 1.5;
}

.message-don strong {
    color: var(--bleu);
}

/* ===== PUB BAS ===== */
.pub-bas {
    background: var(--blanc);
    border: 2px dashed var(--gris-clair);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    min-height: 110px;
}

.pub-bas .pub-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--gris);
    background: var(--gris-clair);
    padding: 3px 8px;
    border-radius: 4px;
    white-space: nowrap;
}

.pub-bas .pub-visuel-bas {
    flex: 1;
    height: 80px;
    background: linear-gradient(135deg, #f0f4ff 0%, #e8f0fe 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--bleu-clair);
    font-size: 0.85rem;
}

.pub-bas .pub-visuel-bas span {
    font-size: 1.6rem;
}

.pub-bas .pub-cta-bas {
    display: inline-block;
    background: var(--bleu-clair);
    color: var(--blanc);
    font-size: 0.75rem;
    padding: 7px 16px;
    border-radius: 20px;
    text-decoration: none;
    font-weight: 600;
    white-space: nowrap;
}

/* ===== FOOTER ===== */
footer {
    text-align: center;
    padding: 24px;
    color: var(--gris);
    font-size: 0.8rem;
    border-top: 1px solid var(--gris-clair);
    margin-top: 16px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
    .page {
        grid-template-columns: 1fr;
    }

    .pub-lateral {
        display: none;
    }

    header p {
        display: none;
    }
}