/* VARIABLES ET RESET */

:root {
    /* Palette de couleurs */
    --primary-blue: #0066CC;
    --primary-blue-light: #3399FF;
    --primary-blue-dark: #004C99;
    --primary-blue-lighter: #E6F2FF;
    
    --secondary-orange: #FF6B35;
    --secondary-orange-light: #FF8C5F;
    --secondary-orange-dark: #E64D1F;
    --secondary-orange-lighter: #FFE8E0;
    
    --accent-green: #00B894;
    --accent-green-light: #55EFC4;
    --accent-green-dark: #00856A;
    --accent-green-lighter: #D5F5EE;
    
    /* Gradients */
    --gradient-start: #0066CC;
    --gradient-middle: #3399FF;
    --gradient-end: #00B894;
    
    /* Couleurs de texte */
    --text-dark: #1A202C;
    --text-medium: #4A5568;
    --text-light: #A0AEC0;
    --background-light: #F7FAFC;
    --background-lighter: #FFFFFF;
    --white: #FFFFFF;
    
    /* Couleurs d'état */
    --success: #48BB78;
    --warning: #ED8936;
    --error: #F56565;
    
    /* Espacements */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Ombres */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

/* HTML de base */
html {
    scroll-behavior: smooth;
    font-size: 16px;
    scroll-padding-top: 5rem;
}

/* Body de base */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--background-light);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Images responsive */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Boutons */
button {
    font-family: inherit;
    cursor: pointer;
}

/* Liens */
a {
    text-decoration: none;
    color: inherit;
}

/* Container centre */
.container {
    width: 100%;
    max-width: 75rem;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* HEADER */

/* Header sticky */
.header {
    background: rgba(255, 255, 255, 0.98);
    padding: var(--spacing-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
}

.logo img {
    width: 3.125rem;
    height: 3.125rem;
    object-fit: contain;
    filter: drop-shadow(0 2px 4px rgba(0, 102, 204, 0.2));
    transition: transform var(--transition-base);
}

.logo img:hover {
    transform: scale(1.05);
}

/* Logos aide caches sur mobile */
.help-logo {
    display: none;
}

/* BURGER MENU */

/* Burger menu */
.burger-menu {
    display: block;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.625rem;
    z-index: 1001;
    position: relative;
}

/* Barres du burger */
.burger-line {
    display: block;
    width: 1.5625rem;
    height: 0.1875rem;
    background: var(--primary-blue);
    margin: 0.3125rem 0;
    transition: transform var(--transition-base), opacity var(--transition-base);
    border-radius: 2px;
}

/* Animation burger actif */
.burger-menu.active .burger-line:nth-child(1) {
    transform: translateY(0.5rem) rotate(45deg);
}

.burger-menu.active .burger-line:nth-child(2) {
    opacity: 0;
}

.burger-menu.active .burger-line:nth-child(3) {
    transform: translateY(-0.5rem) rotate(-45deg);
}

/* NAVIGATION MOBILE */

/* Menu lateral */
.navbar {
    display: flex;
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    padding: 5rem var(--spacing-sm) var(--spacing-sm);
    transition: right var(--transition-base);
    z-index: 1000;
    box-shadow: -4px 0 20px rgba(0, 102, 204, 0.15);
}

/* Navbar active */
.navbar.active {
    right: 0;
}

/* Liens navigation */
.navbar a {
    display: block;
    padding: var(--spacing-sm) 0;
    font-size: 1.125rem;
    font-weight: 500;
    border-bottom: 1px solid rgba(0, 102, 204, 0.1);
    transition: color var(--transition-base), padding-left var(--transition-base);
}

/* Hover liens navigation */
.navbar a:hover {
    color: var(--primary-blue);
    padding-left: 0.625rem;
    background: linear-gradient(90deg, var(--primary-blue-lighter) 0%, transparent 100%);
}

/* TELEPHONE FIXE */

/* Bouton appel flottant */
.phone-fixed {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    background: #b1ff58;
    color: rgb(91, 91, 91);
    padding: 1rem 1.5rem;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: 0 8px 24px rgba(214, 214, 214, 0.4);
    z-index: 99;
    transition: all var(--transition-base);
    font-weight: 600;
    font-size: 0.9rem;
}

/* Hover telephone fixe */
.phone-fixed:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 32px rgba(102, 102, 102, 0.5);
}

/* Icone telephone animee */
.phone-fixed i {
    font-size: 1.25rem;
    animation: ring 2s infinite;
}

/* Animation sonnerie */
@keyframes ring {
    0%, 100% { transform: rotate(0deg); }
    10%, 30% { transform: rotate(-10deg); }
    20% { transform: rotate(10deg); }
}

/* Texte telephone */
.phone-text {
    white-space: nowrap;
}

/* SECTION ACCUEIL */

/* Hero avec gradient */
.section-accueil {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-middle) 50%, var(--gradient-end) 100%);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
    padding: var(--spacing-lg) var(--spacing-sm);
}

/* Pattern de fond */
.section-accueil::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.5;
}

/* Contenu au-dessus du pattern */
.section-accueil > .container > * {
    position: relative;
    z-index: 1;
}

/* Titre principal */
.section-accueil h1 {
    font-size: 1.5rem;
    line-height: 1.3;
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    font-weight: 700;
}

/* BANNIERE URGENCE */

/* Banniere urgence */
.urgency-banner {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    margin-bottom: var(--spacing-lg);
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Icone banniere animee */
.urgency-banner i {
    font-size: 1.125rem;
    animation: pulse 2s infinite;
}

/* Animation pulsation */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* CARTES AIDES */

/* Grille cartes aides */
.help-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

/* Carte aide */
.help-card {
    background: rgba(255, 255, 255, 0.98);
    color: var(--text-dark);
    padding: var(--spacing-md);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    border: 1px solid rgba(0, 102, 204, 0.1);
}

/* Hover carte aide */
.help-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* Icone carte aide */
.help-card i {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

/* Titre carte aide */
.help-card h2 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-blue-dark);
    font-weight: 700;
}

/* Texte carte aide */
.help-card p {
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-medium);
}

.help-card p:last-child {
    margin-bottom: 0;
}

/* INDICATEURS CONFIANCE */

/* Grille indicateurs */
.trust-indicators {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

/* Indicateur confiance */
.trust-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all var(--transition-base);
}

/* Hover indicateur */
.trust-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* Icone indicateur */
.trust-item i {
    font-size: 1.5rem;
}

/* Texte indicateur */
.trust-item span {
    font-size: 0.875rem;
    text-align: center;
}

/* BOUTON PRINCIPAL */

/* Bouton principal */
.btn-primary {
    display: inline-block;
    background: linear-gradient(135deg, var(--secondary-orange) 0%, var(--secondary-orange-light) 100%);
    color: white;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 700;
    border-radius: 50px;
    box-shadow: 0 8px 16px rgba(255, 107, 53, 0.3);
    transition: all var(--transition-base);
    border: none;
}

/* Hover bouton principal */
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 24px rgba(255, 107, 53, 0.4);
}

/* Active bouton principal */
.btn-primary:active {
    transform: translateY(-1px);
}

/* FLECHE BAS */

/* Fleche scroll */
.arrow-down {
    width: 1.875rem;
    height: 1.875rem;
    border-left: 3px solid white;
    border-bottom: 3px solid white;
    transform: rotate(-45deg);
    margin: var(--spacing-lg) auto 0;
    animation: bounce 2s infinite;
}

/* Animation rebond */
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) rotate(-45deg);
    }
    40% {
        transform: translateY(-10px) rotate(-45deg);
    }
    60% {
        transform: translateY(-5px) rotate(-45deg);
    }
}

/* SECTION SIMULATION */

/* Section simulation */
.section-simulation {
    background: var(--background-light);
    padding: var(--spacing-2xl) var(--spacing-sm);
}

/* COMMENT CA MARCHE */

/* Grille etapes */
.how-it-works-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
    margin-top: var(--spacing-2xl);
}

/* Titre grille */
.grid-title {
    grid-column: 1 / -1;
    font-size: 1.8rem;
    text-align: center;
    color: var(--primary-blue-dark);
    font-weight: 700;
    position: relative;
    margin-bottom: var(--spacing-xl);
    padding-top: var(--spacing-md);
}

/* Ligne sous titre */
.grid-title::after {
    content: '';
    display: block;
    width: 5rem;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue) 0%, var(--accent-green) 100%);
    margin: var(--spacing-md) auto 0;
    border-radius: 2px;
}

/* Carte etape */
.step-card {
    background: white;
    padding: var(--spacing-lg) var(--spacing-md);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    position: relative;
    transition: all var(--transition-base);
    border: 2px solid transparent;
    text-align: center;
}

/* Hover carte etape */
.step-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-blue-light);
}

/* Numero etape */
.step-number {
    position: absolute;
    top: -1.25rem;
    left: 50%;
    transform: translateX(-50%);
    width: 2.5rem;
    height: 2.5rem;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-green) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.3);
}

/* Icone etape */
.step-icon {
    margin: var(--spacing-md) 0 var(--spacing-sm);
}

.step-icon i {
    font-size: 3rem;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Titre etape */
.step-card h3 {
    font-size: 1.3rem;
    color: var(--primary-blue-dark);
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

/* Description etape */
.step-card p {
    color: var(--text-medium);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* CALCULATEUR */

/* Boite calculateur */
.calculator-box {
    background: white;
    padding: var(--spacing-lg) var(--spacing-md);
    border-radius: 16px;
    box-shadow: var(--shadow-xl);
    max-width: 37.5rem;
    margin: 0 auto;
    border: 2px solid var(--primary-blue-lighter);
}

/* Titre calculateur */
.calculator-box h2 {
    font-size: 1.5rem;
    text-align: center;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-blue-dark);
    font-weight: 700;
}

/* Sous-titre calculateur */
.calculator-subtitle {
    text-align: center;
    color: var(--text-medium);
    margin-bottom: var(--spacing-md);
}

/* BARRE PROGRESSION */

/* Conteneur barre progression */
.progress-bar-container {
    width: 100%;
    height: 8px;
    background: var(--primary-blue-lighter);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
    transition: opacity var(--transition-base), transform var(--transition-base);
}

/* Barre progression */
.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-blue) 0%, var(--accent-green) 100%);
    border-radius: 10px;
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    width: 25%;
}

/* Barre cachee */
.progress-bar-container.hidden {
    display: none;
}

/* FORMULAIRE */

/* Formulaire calculateur */
.form-calculator {
    width: 100%;
}

/* Etape cachee par defaut */
.form-step {
    display: none;
    flex-direction: column;
}

/* Etape active */
.form-step.active {
    display: flex;
    animation: fadeInSlide 0.3s ease-out;
}

/* Animation apparition */
@keyframes fadeInSlide {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Question principale */
.form-question {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    text-align: center;
    color: var(--primary-blue-dark);
}

/* Sous-question */
.form-sub-question {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-blue-lighter);
    text-align: center;
}

/* OPTIONS FORMULAIRE */

/* Grille options */
.form-options {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

/* Option cliquable */
.option {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md);
    border: 2px solid var(--primary-blue-lighter);
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-base);
    background: white;
    position: relative;
    min-height: 120px;
}

/* Hover option */
.option:hover {
    border-color: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Radio cache */
.option input[type="radio"] {
    display: none;
}

/* Etat selectionne */
.option input[type="radio"]:checked ~ * {
    border: #004C99;
}

/* Icone selectionnee */
.option input[type="radio"]:checked + .option-icon {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-green) 100%);
    color: white;
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.3);
}

/* Texte selectionne */
.option input[type="radio"]:checked ~ span {
    color: var(--primary-blue);
    font-weight: 700;
}

/* Bordure option selectionnee */
.option:has(input[type="radio"]:checked) {
    border-color: var(--primary-blue);
    border-width: 3px;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.03), rgba(0, 184, 148, 0.03));
}

/* Checkmark option selectionnee */
.option input[type="radio"]:checked ~ .option-icon::after {
    content: '✓';
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--success);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
    box-shadow: 0 2px 8px rgba(72, 187, 120, 0.4);
    animation: checkPop 0.3s ease-out;
}

/* Animation checkmark */
@keyframes checkPop {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    50% {
        transform: scale(1.2);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Icone option */
.option-icon {
    width: 3.75rem;
    height: 3.75rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-blue-lighter);
    color: var(--primary-blue);
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    transition: all var(--transition-base);
    position: relative;
}

/* Label option */
.option span:last-child {
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
}

/* CHAMPS FORMULAIRE */

/* Grille champs */
.form-fields {
    display: grid;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

/* Champ formulaire */
.form-field {
    display: flex;
    flex-direction: column;
}

/* Label champ */
.form-field label {
    font-weight: 600;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

/* Input et select */
.form-field input,
.form-field select {
    padding: 0.875rem var(--spacing-sm);
    border: 2px solid var(--primary-blue-lighter);
    border-radius: 8px;
    font-size: 1rem;
    transition: all var(--transition-base);
    background: white;
}

/* Focus input */
.form-field input:focus,
.form-field select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px var(--primary-blue-lighter);
}

/* Hover input */
.form-field input:hover,
.form-field select:hover {
    border-color: var(--primary-blue-light);
}

/* MESSAGES ERREUR */

/* Input erreur */
.input-error {
    border-color: var(--error) !important;
    animation: shake 0.3s ease-in-out;
}

/* Animation shake */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Message erreur */
.error-message {
    color: var(--error);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    font-weight: 500;
    animation: fadeIn 0.2s ease-out;
}

/* Animation fadeIn */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* GROUPE CHAMPS APPARTEMENT */

/* Groupe champs appartement */
.form-field-group {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-blue-lighter) 0%, var(--accent-green-lighter) 100%);
    border-radius: 16px;
    border: 2px solid var(--primary-blue-light);
    animation: slideDown 0.3s ease-out;
}

/* Animation slideDown */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Espacement champs groupe */
.form-field-group .form-field {
    margin-bottom: var(--spacing-sm);
}

.form-field-group .form-field:last-child {
    margin-bottom: 0;
}

/* Label groupe */
.form-field-group label {
    display: block;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary-blue-dark);
    margin-bottom: var(--spacing-xs);
}

/* Select groupe */
.form-field-group select {
    width: 100%;
    padding: 0.875rem var(--spacing-sm);
    font-size: 1rem;
    border: 2px solid var(--primary-blue-lighter);
    border-radius: 8px;
    background-color: white;
    transition: all var(--transition-base);
    cursor: pointer;
}

.form-field-group select:hover {
    border-color: var(--primary-blue-light);
}

.form-field-group select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px var(--primary-blue-lighter);
}

/* CHAMP AUTRE CHAUFFAGE */

/* Champ autre chauffage */
#autre-chauffage-field {
    display: none;
    opacity: 0;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--secondary-orange-lighter);
    border-radius: 12px;
    border: 2px dashed var(--secondary-orange);
}

/* Champ visible */
#autre-chauffage-field[style*="display: block"] {
    opacity: 1;
    transform: translateY(0);
}

/* Label autre chauffage */
#autre-chauffage-field label {
    font-weight: 600;
    color: var(--secondary-orange-dark);
    display: block;
    margin-bottom: var(--spacing-xs);
}

/* Select autre chauffage */
#autre-chauffage {
    width: 100%;
    padding: 0.875rem var(--spacing-sm);
    border: 2px solid var(--secondary-orange);
    border-radius: 8px;
    font-size: 1rem;
    transition: all var(--transition-base);
    background: white;
}

#autre-chauffage:focus {
    outline: none;
    border-color: var(--secondary-orange-dark);
    box-shadow: 0 0 0 3px var(--secondary-orange-lighter);
}

/* NAVIGATION FORMULAIRE */

/* Barre navigation formulaire */
.form-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--primary-blue-lighter);
}

/* Boutons navigation */
.nav-prev,
.nav-next {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 100%);
    color: white;
    border: none;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

/* Bouton desactive */
.nav-prev:disabled {
    background: var(--text-light);
    cursor: not-allowed;
    box-shadow: none;
    opacity: 0.5;
}

/* Hover boutons actifs */
.nav-prev:not(:disabled):hover,
.nav-next:not(:disabled):hover {
    background: linear-gradient(135deg, var(--primary-blue-dark) 0%, var(--primary-blue) 100%);
    transform: scale(1.15);
    box-shadow: var(--shadow-md);
}

/* Active boutons */
.nav-prev:not(:disabled):active,
.nav-next:not(:disabled):active {
    transform: scale(1.05);
}

/* Indicateur page */
.page-indicator {
    font-weight: 600;
    color: var(--text-medium);
    padding: 0.5rem 1rem;
    background: var(--background-light);
    border-radius: 20px;
}

/* Etape actuelle */
.current-step {
    color: var(--primary-blue);
    font-size: 1.125rem;
}

/* BOUTON SUBMIT */

/* Bouton submit */
.btn-submit {
    width: 100%;
    background: linear-gradient(135deg, var(--secondary-orange) 0%, var(--secondary-orange-light) 100%);
    color: white;
    padding: 1rem;
    font-size: 1.125rem;
    font-weight: 700;
    border: none;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: var(--spacing-sm);
    transition: all var(--transition-base);
    box-shadow: 0 8px 16px rgba(255, 107, 53, 0.3);
    margin-top: var(--spacing-md);
}

/* Hover submit */
.btn-submit:not(:disabled):hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(255, 107, 53, 0.4);
}

/* Active submit */
.btn-submit:not(:disabled):active {
    transform: translateY(0);
}

/* Submit desactive */
.btn-submit:disabled {
    background: var(--text-light);
    cursor: not-allowed;
    box-shadow: none;
    opacity: 0.6;
}

/* Disclaimer formulaire */
.form-disclaimer {
    font-size: 0.75rem;
    color: var(--text-medium);
    text-align: center;
    line-height: 1.5;
}

/* MESSAGE CONFIRMATION */

/* Message confirmation */
.confirmation-message {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    position: relative;
    animation: fadeInScale 0.5s ease-out;
}

/* Animation fadeInScale */
@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Bouton fermeture */
.confirmation-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: transparent;
    border: none;
    color: var(--text-light);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-xs);
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    transition: all var(--transition-base);
}

/* Hover bouton fermeture */
.confirmation-close:hover {
    background: var(--primary-blue-lighter);
    color: var(--primary-blue);
    transform: rotate(90deg);
}

/* Icone succes */
.confirmation-icon {
    font-size: 4rem;
    color: var(--success);
    margin-bottom: var(--spacing-md);
    animation: successPop 0.6s ease-out;
}

/* Animation successPop */
@keyframes successPop {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    50% {
        transform: scale(1.2);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Titre confirmation */
.confirmation-message h3 {
    font-size: 2rem;
    color: var(--primary-blue-dark);
    margin-bottom: var(--spacing-md);
    animation: fadeIn 0.6s ease-out 0.2s both;
}

/* Texte confirmation */
.confirmation-text {
    color: var(--text-medium);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
    animation: fadeIn 0.6s ease-out 0.3s both;
}

/* Sous-texte confirmation */
.confirmation-subtext {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary-blue-lighter);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 50px;
    color: var(--primary-blue);
    font-weight: 600;
    animation: fadeIn 0.6s ease-out 0.4s both;
}

/* SECTION AVANTAGES */

/* Section avantages */
.section-avantages {
    background: white;
    padding: var(--spacing-2xl) var(--spacing-sm);
}

/* Titre section avantages */
.section-avantages h2 {
    font-size: 2rem;
    text-align: center;
    color: var(--primary-blue-dark);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

/* Introduction section */
.section-intro {
    text-align: center;
    color: var(--text-medium);
    max-width: 50rem;
    margin: 0 auto var(--spacing-2xl);
    line-height: 1.7;
}

/* Grille avantages */
.advantages-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

/* Carte avantage */
.advantage-card {
    background: var(--background-light);
    padding: var(--spacing-lg);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    text-align: center;
    border: 2px solid transparent;
}

/* Hover carte avantage */
.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-blue-light);
}

/* Icone avantage */
.advantage-icon {
    width: 4rem;
    height: 4rem;
    margin: 0 auto var(--spacing-sm);
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-green) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    box-shadow: var(--shadow-md);
}

/* Titre avantage */
.advantage-card h3 {
    font-size: 1.25rem;
    color: var(--primary-blue-dark);
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

/* Description avantage */
.advantage-card p {
    color: var(--text-medium);
    line-height: 1.6;
}

/* SECTION FAQ */

/* Section FAQ */
.section-faq {
    background: var(--background-light);
    padding: var(--spacing-2xl) var(--spacing-sm);
}

/* Wrappers */
.faq-wrapper,
.reviews-wrapper {
    margin-bottom: var(--spacing-2xl);
}

/* Titres FAQ et avis */
.faq-wrapper h2,
.reviews-wrapper h2 {
    font-size: 2rem;
    text-align: center;
    color: var(--primary-blue-dark);
    margin-bottom: var(--spacing-xl);
    font-weight: 700;
}

/* Liste FAQ */
.faq-list {
    max-width: 50rem;
    margin: 0 auto;
}

/* Item FAQ */
.faq-item {
    background: white;
    border-radius: 12px;
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-base);
}

/* Hover FAQ item */
.faq-item:hover {
    box-shadow: var(--shadow-md);
}

/* Question FAQ */
.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: white;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-blue-dark);
    text-align: left;
    transition: all var(--transition-base);
}

/* Hover question */
.faq-question:hover {
    color: var(--primary-blue);
    background: var(--primary-blue-lighter);
}

/* Icone chevron */
.faq-question i {
    font-size: 1.25rem;
    transition: transform var(--transition-base);
    color: var(--primary-blue);
}

/* Icone question active */
.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

/* Reponse FAQ */
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
                padding 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 0 var(--spacing-md);
}

/* Reponse active */
.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 var(--spacing-md) var(--spacing-md);
}

/* Texte reponse */
.faq-answer p {
    color: var(--text-medium);
    line-height: 1.7;
    animation: fadeIn 0.3s ease-out;
}

/* AVIS CLIENTS */

/* Grille avis */
.reviews-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

/* Carte avis */
.review-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 2px solid var(--primary-blue-lighter);
}

/* Hover carte avis */
.review-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-blue);
}

/* Header avis */
.review-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

/* Avatar utilisateur */
.user-avatar {
    width: 3rem;
    height: 3rem;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-green) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    box-shadow: var(--shadow-sm);
}

/* Notation etoiles */
.review-rating {
    color: #fbbf24;
    font-size: 1rem;
}

/* Texte avis */
.user-review {
    color: var(--text-dark);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
    font-style: italic;
}

/* Nom utilisateur */
.user-name {
    font-weight: 600;
    color: var(--primary-blue-dark);
    margin-bottom: 0.25rem;
}

/* Date avis */
.review-date {
    font-size: 0.875rem;
    color: var(--text-light);
}

/* FOOTER */

/* Footer */
.footer {
    background: linear-gradient(135deg, var(--text-dark) 0%, #2D3748 100%);
    color: white;
    padding: var(--spacing-lg) var(--spacing-sm);
    text-align: center;
}

/* Container footer */
.footer .container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* Liens footer */
.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

/* Style liens footer */
.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-base);
    font-size: 0.875rem;
}

/* Hover liens footer */
.footer-links a:hover {
    color: var(--accent-green-light);
}

/* MENTIONS LÉGALES */

.section-mentions {
    padding: 100px 0 80px;
    background: #f8f9fa;
    min-height: 100vh;
}

.section-mentions h1 {
    color: var(--primary-blue);
    margin-bottom: 30px;
    text-align: center;
}

.intro-text {
    text-align: center;
    color: #666;
    margin-bottom: 50px;
    font-size: 1.05rem;
}

.mention-block {
    background: white;
    padding: 30px;
    margin-bottom: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.08);
}

.mention-block h2 {
    color: var(--primary-blue);
    font-size: 1.5rem;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--secondary-orange);
}

.mention-block h3 {
    color: var(--secondary-orange);
    font-size: 1.2rem;
    margin: 25px 0 15px 0;
}

.mention-block ul {
    margin: 15px 0;
    padding-left: 25px;
}

.mention-block li {
    margin: 8px 0;
    line-height: 1.6;
}

.mention-block a {
    color: var(--primary-blue);
    text-decoration: underline;
}

.mention-block a:hover {
    color: var(--secondary-orange);
}

.date-maj {
    text-align: center;
    color: #999;
    font-style: italic;
    margin-top: 50px;
}

/* RESPONSIVE TABLETTE 768px+ */

@media (min-width: 768px) {
    /* Scroll padding tablette */
    html {
        scroll-padding-top: 6rem;
    }
    
    /* Logo tablette */
    .logo img {
        width: 4rem;
        height: 4rem;
    }
    
    /* Logos aide tablette */
    .help-logo {
        display: flex;
        gap: var(--spacing-md);
    }
    
    .help-logo img {
        width: 3.75rem;
        height: 2.5rem;
        object-fit: contain;
    }
    
    /* Telephone fixe tablette */
    .phone-fixed {
        padding: 1.125rem 1.75rem;
        font-size: 1rem;
    }
    
    /* Titre accueil tablette */
    .section-accueil h1 {
        font-size: 2rem;
    }
    
    /* Cartes aide 3 colonnes */
    .help-cards {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-md);
    }
    
    /* Indicateurs 4 colonnes */
    .trust-indicators {
        grid-template-columns: repeat(4, 1fr);
    }
    
    /* Etapes 3 colonnes */
    .how-it-works-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-lg);
    }
    
    .grid-title {
        font-size: 2.2rem;
    }
    
    .step-number {
        top: var(--spacing-md);
        left: var(--spacing-md);
        transform: none;
    }
    
    .step-icon {
        margin-top: var(--spacing-2xl);
    }
    
    /* Options 2 colonnes */
    .form-options {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Avantages 2 colonnes */
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Avis 2 colonnes */
    .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Footer tablette */
    .footer .container {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    .footer-links {
        flex-direction: row;
        gap: var(--spacing-md);
    }
}

/* RESPONSIVE DESKTOP 1024px+ */

@media (min-width: 1024px) {
    /* Scroll padding desktop */
    html {
        scroll-padding-top: 7rem;
    }
    
    /* Container desktop */
    .container {
        padding: 0 var(--spacing-lg);
    }
    
    /* Header desktop */
    .header {
        padding: var(--spacing-sm) var(--spacing-xl);
    }
    
    /* Logo desktop */
    .logo img {
        width: 6.25rem;
        height: 5.625rem;
    }
    
    /* Logos aide desktop */
    .help-logo {
        gap: var(--spacing-lg);
    }
    
    .help-logo img {
        width: 6.25rem;
        height: 4.375rem;
    }
    
    /* Burger cache desktop */
    .burger-menu {
        display: none;
    }
    
    /* Navbar horizontale */
    .navbar {
        position: static;
        width: auto;
        height: auto;
        flex-direction: row;
        padding: 0;
        gap: var(--spacing-lg);
        box-shadow: none;
        background: transparent;
    }
    
    /* Liens navbar desktop */
    .navbar a {
        border-bottom: none;
        padding: var(--spacing-xs) 0;
        font-size: 1rem;
        position: relative;
    }
    
    /* Soulignement anime */
    .navbar a::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 0;
        height: 2px;
        background: linear-gradient(90deg, var(--primary-blue) 0%, var(--accent-green) 100%);
        transition: width var(--transition-base);
    }
    
    .navbar a:hover {
        padding-left: 0;
        background: transparent;
    }
    
    .navbar a:hover::after {
        width: 100%;
    }
    
    /* Sections desktop */
    .section-accueil,
    .section-simulation,
    .section-avantages,
    .section-faq {
        padding: var(--spacing-3xl) var(--spacing-lg);
    }
    
    /* Titre accueil desktop */
    .section-accueil h1 {
        font-size: 2.5rem;
        max-width: 56.25rem;
        margin-left: auto;
        margin-right: auto;
    }
    
    /* Titre grille desktop */
    .grid-title {
        font-size: 2.5rem;
    }
    
    /* Cartes etapes desktop */
    .step-card {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
    
    .step-number {
        width: 3.125rem;
        height: 3.125rem;
        font-size: 1.5rem;
    }
    
    .step-icon i {
        font-size: 4rem;
    }
    
    .step-card h3 {
        font-size: 1.5rem;
    }
    
    .step-card p {
        font-size: 1rem;
    }
    
    /* Calculateur desktop */
    .calculator-box {
        padding: var(--spacing-2xl);
    }
    
    /* Avantages 3 colonnes */
    .advantages-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    /* Avis 3 colonnes */
    .reviews-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* RESPONSIVE LARGE DESKTOP 1440px+ */

@media (min-width: 1440px) {
    /* Scroll padding large */
    html {
        scroll-padding-top: 8rem;
    }
    
    /* Titre accueil large */
    .section-accueil h1 {
        font-size: 3rem;
    }
    
    /* Titre grille large */
    .grid-title {
        font-size: 2.8rem;
    }
    
    /* Espacement etapes large */
    .how-it-works-grid {
        gap: var(--spacing-xl);
    }
    
    /* Cartes etapes large */
    .step-card {
        padding: 3rem 2.5rem;
    }
    
    .step-card h3 {
        font-size: 1.6rem;
    }
    
    .step-card p {
        font-size: 1.1rem;
    }
    
    .step-icon i {
        font-size: 4.5rem;
    }
}

/* UTILITAIRES */

/* Element cache */
.hidden {
    display: none !important;
}

/* Texte gradient */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Animation fadeInUp */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Classe animation */
.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* PRINT */

@media print {
    /* Masquer elements impression */
    header,
    .calculator-box,
    .cta-section,
    footer {
        display: none;
    }
    
    /* Optimiser impression */
    body {
        color: black;
        background: white;
    }
    
    /* Eviter coupures */
    h1, h2, h3 {
        page-break-after: avoid;
    }
    
    .advantage-card,
    .step-card {
        page-break-inside: avoid;
    }
}