:root {
    /* Palette Ultra-Moderne Premium */
    --c-primary: #2563EB;
    --c-primary-dark: #1D4ED8;
    --primary-gradient: linear-gradient(135deg, #2563EB 0%, #4F46E5 100%);
    
    --c-secondary: #64748B;
    --c-success: #10B981;
    --c-danger: #EF4444;
    
    --c-light: #F8FAFC;
    --c-dark: #0F172A;
    --c-text: #0F172A;
    --c-text-muted: #64748B;
    
    --c-bg-body: #F1F5F9; /* Gris très très clair */
    --c-bg-card: #FFFFFF;
    --c-input-bg: #F8FAFC;
    
    --c-border: #E2E8F0;
    
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    --shadow-card: 0 20px 40px -10px rgba(0,0,0,0.05);
    --shadow-btn: 0 10px 20px -5px rgba(37, 99, 235, 0.4);
    
    --border-radius: 24px; /* Cartes très arrondies */
    --radius-input: 14px;
    --font-family: 'Plus Jakarta Sans', sans-serif;
}

/* --- Base --- */
body { font-family: var(--font-family); padding: 20px; margin: 0; background-color: var(--c-bg-body); color: var(--c-text); }
h2 { text-align: center; color: var(--c-dark); margin-bottom: 25px; margin-top: 0; font-weight: 800; letter-spacing: -0.5px; }
h3, h4, h5 { color: var(--c-dark); margin-top: 0; font-weight: 800; letter-spacing: -0.5px; }
h3 { font-size: 1.4em; margin-bottom: 20px;}

/* --- Layout --- */
.container { display: grid; grid-template-columns: minmax(400px, 1.2fr) 1fr; gap: 24px; max-width: 1200px; margin: auto; }
@media (max-width: 900px) { .container { grid-template-columns: 1fr; } }

/* --- Components (Cartes Premium) --- */
.card { 
    background-color: var(--c-bg-card); 
    border-radius: var(--border-radius); 
    box-shadow: var(--shadow-card); 
    padding: 30px; 
    border: 1px solid rgba(255,255,255,0.6); 
}
.config-card { padding: 40px; } /* Plus d'air pour le formulaire principal */

div { margin-bottom: 15px; }
label { display: block; margin-bottom: 8px; font-weight: 700; color: var(--c-dark); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.5px; }

/* --- Inputs Soft & Modernes --- */
input[type="number"], input[type="text"], select { 
    width: 100%; 
    padding: 14px 18px; 
    box-sizing: border-box; 
    border: 2px solid transparent; 
    border-radius: var(--radius-input); 
    background-color: var(--c-input-bg); 
    font-size: 1rem; 
    color: var(--c-text);
    font-family: inherit;
    font-weight: 600;
    margin-bottom: 15px; 
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); 
}
input[type="number"]:focus, input[type="text"]:focus, select:focus { 
    outline: none; 
    background-color: var(--c-bg-card);
    border-color: var(--c-primary); 
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15); 
}
select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748B' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 16px;
}

/* --- Checkbox Wrappers --- */
.checkbox-wrapper { display: flex; gap: 10px; align-items: center; }
input[type="checkbox"], input[type="radio"] { width: 20px; height: 20px; margin-right: 5px; accent-color: var(--c-primary); cursor: pointer; }
input[type="checkbox"] + label, input[type="radio"] + label { display: inline-block; font-weight: 600; margin: 0; cursor: pointer; font-size: 0.95rem; text-transform: none; letter-spacing: normal;}

/* --- Buttons --- */
button { 
    padding: 14px 20px; 
    background-color: var(--c-primary); 
    color: white; 
    border: none; 
    cursor: pointer; 
    font-size: 1rem; 
    width: 100%; 
    border-radius: var(--radius-input); 
    font-weight: 800; 
    transition: all 0.3s ease; 
}
.btn-main { 
    background: var(--primary-gradient); 
    font-size: 1.1em; 
    padding: 18px; 
    box-shadow: var(--shadow-btn);
}
.btn-main:hover { transform: translateY(-3px); box-shadow: 0 15px 25px -5px rgba(37, 99, 235, 0.5); filter: brightness(1.1); }
.btn-secondary { background-color: var(--c-input-bg); color: var(--c-text); border: 1px solid var(--c-border); box-shadow: none; }
.btn-secondary:hover { background-color: #E2E8F0; transform: translateY(-1px); }
.btn-print { background-color: var(--c-dark); margin-top: 10px; box-shadow: var(--shadow-sm); }
.btn-print:hover { background-color: #1e293b; transform: translateY(-2px); }
.btn-danger { background: var(--c-danger); }
.btn-success { background: var(--c-success); }
.btn-text { background: none; color: var(--c-text-muted); text-decoration: none; margin-top: 10px; font-weight: 600; }
.btn-text:hover { background: var(--c-input-bg); color: var(--c-primary); }
.btn-group { display: flex; gap: 10px; }
.btn-group-vertical { display: flex; flex-direction: column; gap: 12px; }

/* --- Sections Spéciales --- */
.input-group-highlight { background: #FFFBEB; padding: 20px; border-radius: var(--radius-input); margin-bottom: 15px; border-left: 4px solid #F59E0B; }
.options-sub { padding: 20px; background: var(--c-light); border-left: 4px solid var(--c-primary); margin-bottom: 20px; border-radius: 0 var(--radius-input) var(--radius-input) 0; }
.border-accent { border-color: var(--c-danger); }
.mur-selector { display: flex; gap: 10px; margin-bottom: 20px; background: var(--c-border); padding: 5px; border-radius: 12px; }
.mur-selector label { font-weight: 600; cursor: pointer; flex: 1; text-align: center; padding: 10px; border-radius: 8px; margin-bottom: 0; color: var(--c-text-muted); transition: all 0.2s ease; text-transform: none; letter-spacing: normal;}
.mur-selector input[type="radio"] { display: none; }
.mur-selector input[type="radio"]:checked + span { font-weight: 800; color: var(--c-primary); }
.mur-selector label:has(input[type="radio"]:checked) { background: white; box-shadow: var(--shadow-sm); }

/* --- Header & Stepper (Style Pilule) --- */
.app-header { background: transparent; padding: 10px 20px; display: flex; flex-direction: column; align-items: center; gap: 20px; margin-bottom: 30px; margin-top: 10px; }
.header-logo { max-height: 80px; width: auto; display: block; filter: drop-shadow(0 4px 6px rgba(0,0,0,0.05)); }
.stepper { 
    display: flex; 
    justify-content: space-between; 
    background: #E2E8F0; 
    border-radius: 100px; 
    padding: 6px; 
    width: 100%;
    max-width: 400px;
}
.step { 
    flex: 1; 
    text-align: center; 
    padding: 10px 0; 
    font-weight: 800; 
    color: var(--c-text-muted); 
    border-radius: 100px; 
    transition: all 0.3s ease; 
    cursor: default;
    background: transparent;
    border: none;
    font-size: 1rem;
}
.step.active { 
    background: var(--c-bg-card); 
    color: var(--c-primary); 
    box-shadow: var(--shadow-sm); 
    transform: none;
}

/* --- Wizard Steps --- */
.wizard-step { display: none; animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1); }
.wizard-step.active-step { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* --- Dashboard --- */
.dashboard-container { max-width: 900px; margin: 40px auto; display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.welcome-card { background: var(--primary-gradient); color: white; padding: 40px; border-radius: var(--border-radius); text-align: center; cursor: pointer; transition: all 0.3s ease; box-shadow: var(--shadow-btn); border: none; }
.welcome-card:hover { transform: translateY(-5px); box-shadow: 0 20px 30px -5px rgba(37, 99, 235, 0.4); }
.welcome-card .icon { font-size: 3.5em; margin-bottom: 15px; font-weight: 300;}
.welcome-card h3 { color: white; margin: 0; font-size: 1.5rem; }
.welcome-card p { opacity: 0.9; font-weight: 500; }
.projects-list-container { background: white; padding: 30px; border-radius: var(--border-radius); border: 1px solid var(--c-border); height: 300px; overflow-y: auto; box-shadow: var(--shadow-card); }
.saved-project-item { padding: 15px; border-bottom: 1px solid var(--c-border); display: flex; justify-content: space-between; align-items: center; cursor: pointer; font-weight: 600; transition: background 0.2s;}
.saved-project-item:hover { background: var(--c-input-bg); border-radius: 8px;}
.btn-delete { background: transparent; color: var(--c-danger); padding: 8px; width: auto; }
.btn-delete:hover { background: #FEE2E2; }

/* --- 3D Container --- */
#apercuElevationContainer { position: relative; width: 100%; height: 450px; background-color: var(--c-input-bg); border: 2px solid var(--c-border); margin-bottom: 30px; border-radius: 16px; overflow: hidden; box-shadow: inset 0 2px 4px rgba(0,0,0,0.02); }
#apercuElevationContainer > canvas { display: block; width: 100%; height: 100%; }

/* --- Listes et Tables --- */
ul { list-style-type: none; padding-left: 0; margin-top: 0; margin-bottom: 20px; }
.tech-list { font-size: 0.95em; max-height: 250px; overflow-y: auto; border: 2px solid var(--c-border); padding: 15px; border-radius: 12px; background: var(--c-input-bg); font-weight: 500;}
.tech-list li { border-bottom: 1px solid rgba(0,0,0,0.05); padding: 8px 5px; }
.tech-list li:last-child { border-bottom: none; }
table { width: 100%; margin-top: 20px; border-collapse: separate; border-spacing: 0; border-radius: 12px; overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--c-border); font-size: 0.95em; }
table th, table td { border-bottom: 1px solid var(--c-border); padding: 12px 15px; text-align: left; }
table th { background-color: var(--c-input-bg); font-weight: 800; text-transform: uppercase; font-size: 0.8em; letter-spacing: 0.5px; color: var(--c-text-muted); }
table tr:last-child td { border-bottom: none; }
table tr:hover { background-color: rgba(0,0,0,0.01); }

/* --- Utilities --- */
.hidden { display: none !important; }
.mt-5 { margin-top: 5px; }
.mt-10 { margin-top: 10px; }
.mt-20 { margin-top: 20px; }
.mb-5 { margin-bottom: 5px; }
.p-10 { padding: 10px; }
.bg-light { background-color: var(--c-input-bg); border: none; }
.grid-2-col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.align-center { align-items: center; }

.module-list-container { margin-top: 15px; padding: 20px; background: white; border: 2px solid var(--c-border); border-radius: 12px;}
.container-center { max-width: 650px; margin: 20px auto; }
.section-titre-light { margin-top: 20px; font-weight: 800; color: var(--c-primary); border-bottom: 2px solid var(--c-border); padding-bottom: 10px; font-size: 1.1em; }

/* --- Toast & Modal --- */
.toast-notification { visibility: hidden; min-width: 250px; background-color: var(--c-dark); color: #fff; text-align: center; border-radius: 50px; padding: 16px 24px; position: fixed; z-index: 9999; left: 50%; bottom: 30px; transform: translateX(-50%); font-size: 0.95rem; font-weight: 600; box-shadow: 0 10px 25px rgba(0,0,0,0.2); opacity: 0; transition: opacity 0.5s, bottom 0.5s; }
.toast-notification.show { visibility: visible; opacity: 1; bottom: 50px; }
.custom-modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(15, 23, 42, 0.6); backdrop-filter: blur(4px); z-index: 10000; display: flex; justify-content: center; align-items: center; }
.custom-modal { background: white; padding: 35px; border-radius: 24px; width: 90%; max-width: 360px; text-align: center; box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25); }
.modal-buttons { display: flex; gap: 15px; justify-content: center; margin-top: 25px;}
.btn-modal { padding: 12px 20px; border-radius: 12px; border: none; font-weight: 800; cursor: pointer; flex: 1; }
.btn-no { background: var(--c-input-bg); color: var(--c-text); }
.btn-no:hover { background: #E2E8F0; }
.btn-yes { background: var(--primary-gradient); color: white; box-shadow: var(--shadow-btn); }
.btn-danger-modal { background: var(--c-danger); color: white; }

/* --- Bouton Admin Flottant --- */
.btn-admin-floating {
    position: fixed; bottom: 25px; right: 25px;
    width: 55px; height: 55px; border-radius: 50%;
    background-color: var(--c-dark); color: white;
    font-size: 24px; border: none; cursor: pointer;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2); z-index: 9000;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); opacity: 0.8;
}
.btn-admin-floating:hover { opacity: 1; transform: rotate(90deg) scale(1.1); background-color: black; }

/* --- IMPRESSION (Ne pas modifier) --- */
@media print {
    body { background-color: white; padding: 0; margin: 0; }
    body > *:not(#zoneImpression) { display: none !important; }
    #zoneImpression { display: block !important; position: absolute; top: 0; left: 0; width: 100% !important; margin: 0 !important; padding: 0 !important; font-family: sans-serif; font-size: 11pt; color: #000; }
    .print-header { display: flex; justify-content: space-between; align-items: flex-start; border-bottom: 2px solid #2563EB; padding-bottom: 15px; margin-bottom: 20px; width: 100%; }
    .print-logo img { height: 70px; width: auto; }
    .print-info { text-align: right; font-size: 10pt; }
    .client-box { background-color: #f4f4f4 !important; border: 1px solid #ddd; padding: 15px; width: 100%; box-sizing: border-box; -webkit-print-color-adjust: exact; print-color-adjust: exact; margin-bottom: 20px; }
    .print-3d-view { text-align: center; margin-bottom: 20px; border: 1px solid #eee; width: 100%; box-sizing: border-box; }
    .print-3d-view img { width: 95%; max-height: 550px; object-fit: contain; }
    h3 { color: #2563EB; border-bottom: 1px solid #ccc; margin-top: 25px; padding-bottom: 5px; }
    table { width: 100% !important; border-collapse: collapse; margin-bottom: 20px; font-size: 10pt; border: none; box-shadow: none;}
    th { background-color: #2563EB !important; color: white !important; font-weight: bold; padding: 8px; -webkit-print-color-adjust: exact; print-color-adjust: exact; border: 1px solid #ddd;}
    td { border-bottom: 1px solid #ddd; border-left: 1px solid #ddd; border-right: 1px solid #ddd; padding: 8px; }
    .print-footer { margin-top: 40px; border-top: 1px solid #ccc; text-align: center; font-size: 9pt; color: #666; padding-top: 10px; }
}