/* ==========================================================================
   ARCHIDRAFT - CHARTE GRAPHIQUE & PALETTE OFFICIELLE
   Noir charbon       : #151515 (25% - Typo principale, header/footer, accents)
   Blanc cassé        : #F7F6F6 (55% - Fond principal de page & cartes claires)
   Gris chaud clair   : #E8E6E3 (12% - Surfaces géométriques, bordures, bandes)
   Beige sable        : #D6C8B5 (5%  - Lignes décoratives, badges, accents dorés)
   Gris graphite      : #595756 (3%  - Textes secondaires & détails techniques)
   ========================================================================== */

:root {
    --color-noir-charbon: #151515;
    --color-blanc-casse: #F7F6F6;
    --color-gris-chaud: #E8E6E3;
    --color-beige-sable: #D6C8B5;
    --color-beige-sable-light: rgba(214, 200, 181, 0.2);
    --color-gris-graphite: #595756;
    --color-blanc-pur: #FFFFFF;

    /* Typographies */
    --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Transitions & Ombres */
    --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    --shadow-subtle: 0 4px 20px rgba(21, 21, 21, 0.04);
    --shadow-medium: 0 10px 30px rgba(21, 21, 21, 0.08);
    --shadow-deep: 0 20px 45px rgba(21, 21, 21, 0.12);

    /* Grille & Espacements */
    --container-max: 1240px;
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
}

/* Reset CSS moderne */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--color-blanc-casse);
    color: var(--color-noir-charbon);
    font-family: var(--font-body);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

img, svg {
    display: block;
    max-width: 100%;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* Structure Conteneur */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ==========================================================================
   TOPBAR D'INFORMATIONS
   ========================================================================== */
.topbar {
    background-color: var(--color-noir-charbon);
    color: var(--color-blanc-casse);
    font-size: 0.78rem;
    padding: 0.45rem 0;
    border-bottom: 1px solid rgba(214, 200, 181, 0.3);
}

.topbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar-left, .topbar-right {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.topbar-sep {
    color: var(--color-gris-graphite);
    opacity: 0.6;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    color: var(--color-beige-sable);
    font-weight: 500;
}

.pulse-dot {
    width: 7px;
    height: 7px;
    background-color: #4ade80;
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.7);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(74, 222, 128, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); }
}

.topbar-link {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--color-blanc-casse);
    transition: color var(--transition-fast);
}

.topbar-link:hover {
    color: var(--color-beige-sable);
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.header {
    background-color: rgba(247, 246, 246, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gris-chaud);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.header.scrolled {
    box-shadow: var(--shadow-subtle);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 76px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.logo-mark {
    width: 40px;
    height: 40px;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.brand-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: 0.08em;
    color: var(--color-noir-charbon);
    line-height: 1.1;
}

.brand-title span {
    color: var(--color-gris-graphite);
    font-weight: 400;
}

.brand-subtitle {
    font-size: 0.62rem;
    letter-spacing: 0.22em;
    font-weight: 600;
    color: var(--color-gris-graphite);
}

.nav-list {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-noir-charbon);
    position: relative;
    padding: 0.3rem 0;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0%;
    height: 2px;
    background-color: var(--color-beige-sable);
    transition: width var(--transition-smooth);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link:hover {
    color: var(--color-gris-graphite);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.burger-btn {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 28px;
    height: 22px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
}

.burger-btn span {
    width: 100%;
    height: 2px;
    background-color: var(--color-noir-charbon);
    transition: transform var(--transition-smooth), opacity var(--transition-smooth);
}

/* ==========================================================================
   BOUTONS & COMPOSANTS D'ACCENT
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.85rem 1.75rem;
    font-family: var(--font-heading);
    font-size: 0.92rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-smooth);
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--color-noir-charbon);
    color: var(--color-blanc-casse);
    box-shadow: 0 4px 12px rgba(21, 21, 21, 0.15);
}

.btn-primary:hover {
    background-color: #2b2b2b;
    border-color: var(--color-beige-sable);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(21, 21, 21, 0.22);
}

.btn-secondary {
    background-color: var(--color-blanc-pur);
    color: var(--color-noir-charbon);
    border: 1px solid var(--color-gris-chaud);
}

.btn-secondary:hover {
    background-color: var(--color-gris-chaud);
    border-color: var(--color-beige-sable);
    transform: translateY(-2px);
}

.btn-whatsapp {
    background-color: #128C7E;
    color: #FFFFFF !important;
    border: 1px solid #075E54;
    box-shadow: 0 4px 12px rgba(18, 140, 126, 0.25);
}

.btn-whatsapp:hover {
    background-color: #075E54;
    border-color: var(--color-beige-sable);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(18, 140, 126, 0.35);
}

.btn-sm {
    padding: 0.55rem 1.15rem;
    font-size: 0.82rem;
}

.btn-block {
    width: 100%;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    color: var(--color-noir-charbon);
    background-color: var(--color-beige-sable-light);
    border-left: 3px solid var(--color-beige-sable);
    padding: 0.3rem 0.75rem;
    margin-bottom: 0.85rem;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-noir-charbon);
    letter-spacing: -0.02em;
    line-height: 1.25;
    margin-bottom: 0.85rem;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--color-gris-graphite);
    max-width: 680px;
    line-height: 1.6;
}

.section-header {
    margin-bottom: 3.5rem;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
    position: relative;
    padding: 5rem 0 4.5rem;
    background-color: var(--color-blanc-casse);
    overflow: hidden;
}

.architectural-grid-overlay {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(to right, rgba(232, 230, 227, 0.55) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(232, 230, 227, 0.55) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.7;
    pointer-events: none;
}

.hero-container {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 3.5rem;
    align-items: center;
}

.hero-badge {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.badge-accent {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    background-color: var(--color-noir-charbon);
    color: var(--color-blanc-casse);
    padding: 0.35rem 0.8rem;
    border-radius: 2px;
}

.badge-code {
    font-family: var(--font-heading);
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--color-gris-graphite);
    border: 1px solid var(--color-beige-sable);
    padding: 0.3rem 0.65rem;
    background: rgba(255, 255, 255, 0.8);
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.2rem;
    font-weight: 700;
    line-height: 1.15;
    color: var(--color-noir-charbon);
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}

.hero-title .text-highlight {
    position: relative;
    display: inline-block;
    color: var(--color-noir-charbon);
}

.hero-title .text-highlight::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 6px;
    width: 100%;
    height: 12px;
    background-color: var(--color-beige-sable-light);
    z-index: -1;
    transform: rotate(-1deg);
}

.hero-description {
    font-size: 1.12rem;
    color: var(--color-gris-graphite);
    margin-bottom: 2.2rem;
    max-width: 540px;
    line-height: 1.7;
}

.hero-cta-group {
    display: flex;
    gap: 1.15rem;
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 1.75rem;
    padding-top: 1.75rem;
    border-top: 1px solid var(--color-gris-chaud);
}

.stat-card {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-noir-charbon);
    line-height: 1.1;
}

.stat-label {
    font-size: 0.78rem;
    color: var(--color-gris-graphite);
    margin-top: 0.25rem;
}

.stat-divider {
    width: 1px;
    height: 38px;
    background-color: var(--color-beige-sable);
}

/* Visuel Blueprint Hero */
.hero-visual {
    position: relative;
}

.blueprint-card {
    background-color: var(--color-blanc-pur);
    border: 1px solid var(--color-noir-charbon);
    border-radius: var(--border-radius-sm);
    box-shadow: 12px 14px 0px rgba(21, 21, 21, 0.95);
    overflow: hidden;
    position: relative;
}

.blueprint-header {
    background-color: var(--color-noir-charbon);
    color: var(--color-blanc-casse);
    padding: 0.65rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-heading);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.05em;
}

.blueprint-coords {
    color: var(--color-beige-sable);
}

.blueprint-frame {
    background-color: var(--color-blanc-casse);
    padding: 0.5rem;
    border-bottom: 1px solid var(--color-gris-chaud);
}

.blueprint-svg {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 2px 4px rgba(21, 21, 21, 0.03));
}

.blueprint-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background-color: var(--color-gris-chaud);
}

.scale-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.scale-label {
    font-family: var(--font-heading);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--color-gris-graphite);
}

.scale-ruler {
    display: flex;
    height: 6px;
    width: 70px;
    border: 1px solid var(--color-noir-charbon);
}

.scale-ruler .segment {
    flex: 1;
}

.scale-ruler .segment.dark {
    background-color: var(--color-noir-charbon);
}

.scale-ruler .segment.sand {
    background-color: var(--color-beige-sable);
}

.blueprint-status .status-badge {
    font-family: var(--font-heading);
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--color-noir-charbon);
    background-color: var(--color-beige-sable);
    padding: 0.25rem 0.6rem;
    border-radius: 2px;
}

/* ==========================================================================
   BANDEAU LOGICIELS & ENVIRONNEMENT TECHNIQUE
   ========================================================================== */
.software-band {
    background-color: var(--color-gris-chaud);
    padding: 1.25rem 0;
    border-top: 1px solid rgba(214, 200, 181, 0.4);
    border-bottom: 1px solid rgba(214, 200, 181, 0.4);
}

.software-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1.25rem;
}

.software-title {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--color-gris-graphite);
}

.software-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.tech-pill {
    font-family: var(--font-heading);
    font-size: 0.82rem;
    font-weight: 600;
    background-color: var(--color-blanc-pur);
    color: var(--color-noir-charbon);
    padding: 0.35rem 0.95rem;
    border: 1px solid rgba(21, 21, 21, 0.1);
    border-radius: 20px;
    transition: all var(--transition-fast);
}

.tech-pill:hover {
    border-color: var(--color-beige-sable);
    background-color: var(--color-noir-charbon);
    color: var(--color-blanc-casse);
}

/* ==========================================================================
   SECTIONS GÉNÉRALES & SERVICES
   ========================================================================== */
.section {
    padding: 5.5rem 0;
}

.section-prestations {
    background-color: var(--color-blanc-casse);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
}

.service-card {
    background-color: var(--color-blanc-pur);
    border: 1px solid var(--color-gris-chaud);
    border-radius: var(--border-radius-md);
    padding: 2.25rem;
    position: relative;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-beige-sable);
    box-shadow: var(--shadow-medium);
}

.service-card.featured {
    border: 2px solid var(--color-noir-charbon);
    background: linear-gradient(180deg, #FFFFFF 0%, #FAFAF9 100%);
}

.featured-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background-color: var(--color-noir-charbon);
    color: var(--color-beige-sable);
    font-family: var(--font-heading);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    padding: 0.25rem 0.75rem;
    border-radius: 2px;
}

.service-number {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-gris-chaud);
    line-height: 1;
}

.service-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-gris-chaud);
    color: var(--color-noir-charbon);
    border-radius: var(--border-radius-sm);
    margin-bottom: 1.5rem;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.service-card:hover .service-icon {
    background-color: var(--color-noir-charbon);
    color: var(--color-beige-sable);
}

.service-title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-noir-charbon);
    margin-bottom: 0.85rem;
}

.service-desc {
    font-size: 0.95rem;
    color: var(--color-gris-graphite);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.service-checklist {
    margin-bottom: 2rem;
    flex-grow: 1;
}

.service-checklist li {
    font-size: 0.86rem;
    color: var(--color-gris-graphite);
    margin-bottom: 0.6rem;
    padding-left: 1.25rem;
    position: relative;
}

.service-checklist li::before {
    content: "▫";
    position: absolute;
    left: 0;
    color: var(--color-beige-sable);
    font-weight: bold;
}

.service-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.25rem;
    border-top: 1px solid var(--color-gris-chaud);
}

.price-hint {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--color-noir-charbon);
}

.link-arrow {
    font-family: var(--font-heading);
    font-size: 0.86rem;
    font-weight: 600;
    color: var(--color-noir-charbon);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    transition: transform var(--transition-fast);
}

.link-arrow:hover {
    color: var(--color-gris-graphite);
    transform: translateX(3px);
}

/* ==========================================================================
   SECTION COMPARATEUR INTERACTIF (PLAN 2D / RENDU 3D SLIDER)
   ========================================================================== */
.section-comparison {
    background-color: var(--color-gris-chaud);
    border-top: 1px solid var(--color-beige-sable);
    border-bottom: 1px solid var(--color-beige-sable);
}

.comparison-wrapper {
    position: relative;
    max-width: 980px;
    margin: 0 auto;
}

.comparison-slider-box {
    position: relative;
    width: 100%;
    height: 520px;
    background-color: var(--color-blanc-pur);
    border: 2px solid var(--color-noir-charbon);
    box-shadow: 0 16px 40px rgba(21, 21, 21, 0.12);
    overflow: hidden;
    user-select: none;
    cursor: ew-resize;
}

.comparison-layer {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.layer-after {
    z-index: 1;
}

.layer-before {
    z-index: 2;
    width: 50%; /* Découpé par JS */
    border-right: 2px solid var(--color-noir-charbon);
}

.render-3d-visual, .blueprint-visual {
    width: 100%;
    height: 100%;
    position: relative;
}

.render-overlay-badge, .blueprint-overlay-badge {
    position: absolute;
    top: 18px;
    font-family: var(--font-heading);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    padding: 0.35rem 0.8rem;
    border-radius: 2px;
    z-index: 5;
}

.render-overlay-badge {
    right: 18px;
    background-color: var(--color-noir-charbon);
    color: var(--color-blanc-casse);
    border: 1px solid var(--color-beige-sable);
}

.blueprint-overlay-badge {
    left: 18px;
    background-color: var(--color-blanc-casse);
    color: var(--color-noir-charbon);
    border: 1px solid var(--color-noir-charbon);
}

.slider-handle {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 40px;
    margin-left: -20px;
    z-index: 10;
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.handle-line {
    position: absolute;
    width: 2px;
    height: 100%;
    background-color: var(--color-noir-charbon);
}

.handle-circle {
    position: relative;
    width: 42px;
    height: 42px;
    background-color: var(--color-beige-sable);
    border: 2px solid var(--color-noir-charbon);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(21, 21, 21, 0.25);
    transition: transform var(--transition-fast);
}

.comparison-slider-box:active .handle-circle {
    transform: scale(1.15);
}

.slider-instruction {
    text-align: center;
    margin-top: 1rem;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-gris-graphite);
}

/* ==========================================================================
   PORTFOLIO & PROJETS
   ========================================================================== */
.section-portfolio {
    background-color: var(--color-blanc-casse);
}

.portfolio-filters {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
}

.filter-btn {
    font-family: var(--font-heading);
    font-size: 0.88rem;
    font-weight: 600;
    padding: 0.6rem 1.25rem;
    background-color: var(--color-blanc-pur);
    color: var(--color-noir-charbon);
    border: 1px solid var(--color-gris-chaud);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--color-noir-charbon);
    color: var(--color-blanc-casse);
    border-color: var(--color-noir-charbon);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background-color: var(--color-blanc-pur);
    border: 1px solid var(--color-gris-chaud);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

.project-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-medium);
    border-color: var(--color-beige-sable);
}

.project-img-box {
    position: relative;
    height: 240px;
    background-color: var(--color-gris-chaud);
    overflow: hidden;
}

.project-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    z-index: 3;
    font-family: var(--font-heading);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    padding: 0.25rem 0.6rem;
    background-color: var(--color-noir-charbon);
    color: var(--color-blanc-casse);
}

.project-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background-color: #202020;
    background-image: radial-gradient(#333 1px, transparent 1px);
    background-size: 16px 16px;
    color: var(--color-blanc-casse);
    text-align: center;
    transition: transform var(--transition-smooth);
}

.project-card:hover .project-placeholder {
    transform: scale(1.03);
}

.p-villa { background: linear-gradient(135deg, #1f2122 0%, #151515 100%); }
.p-extension { background: linear-gradient(135deg, #272822 0%, #171816 100%); }
.p-ferme { background: linear-gradient(135deg, #2c2927 0%, #151515 100%); }
.p-surelevation { background: linear-gradient(135deg, #23272a 0%, #131416 100%); }
.p-rendu { background: linear-gradient(135deg, #2b2520 0%, #151515 100%); }
.p-execution { background: linear-gradient(135deg, #192024 0%, #121314 100%); }

.proj-blueprint-art {
    border: 1px dashed rgba(214, 200, 181, 0.4);
    padding: 1.25rem;
    width: 90%;
}

.proj-code {
    font-family: var(--font-heading);
    font-size: 0.72rem;
    color: var(--color-beige-sable);
    letter-spacing: 0.15em;
    display: block;
    margin-bottom: 0.4rem;
}

.proj-blueprint-art h3 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    color: #FFFFFF;
    margin-bottom: 0.25rem;
}

.proj-blueprint-art p {
    font-size: 0.78rem;
    color: #AAAAAA;
}

.project-overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(21, 21, 21, 0.65);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-smooth);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.view-detail-btn {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-noir-charbon);
    background-color: var(--color-beige-sable);
    padding: 0.65rem 1.25rem;
    border-radius: var(--border-radius-sm);
    transform: translateY(10px);
    transition: transform var(--transition-smooth);
}

.project-card:hover .view-detail-btn {
    transform: translateY(0);
}

.project-info {
    padding: 1.5rem;
}

.project-meta {
    font-size: 0.78rem;
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-gris-graphite);
    margin-bottom: 0.4rem;
}

.project-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-noir-charbon);
    margin-bottom: 0.5rem;
    line-height: 1.35;
}

.project-desc {
    font-size: 0.88rem;
    color: var(--color-gris-graphite);
    margin-bottom: 1.15rem;
    line-height: 1.5;
}

.project-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tag {
    font-family: var(--font-heading);
    font-size: 0.72rem;
    font-weight: 600;
    background-color: var(--color-gris-chaud);
    color: var(--color-noir-charbon);
    padding: 0.2rem 0.55rem;
    border-radius: 2px;
}

/* ==========================================================================
   MODAL LIGHTBOX DETAIL PROJET
   ========================================================================== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.modal.active {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background-color: rgba(21, 21, 21, 0.75);
    backdrop-filter: blur(4px);
}

.modal-dialog {
    position: relative;
    background-color: var(--color-blanc-pur);
    width: 100%;
    max-width: 680px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-deep);
    border: 1px solid var(--color-noir-charbon);
    z-index: 2;
    overflow: hidden;
    animation: modalIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 18px;
    background: transparent;
    border: none;
    font-size: 1.75rem;
    color: var(--color-noir-charbon);
    cursor: pointer;
    line-height: 1;
    z-index: 10;
}

.modal-body {
    padding: 2.25rem;
}

.modal-header-tag {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-gris-graphite);
    margin-bottom: 0.5rem;
}

.modal-title {
    font-family: var(--font-heading);
    font-size: 1.65rem;
    font-weight: 700;
    color: var(--color-noir-charbon);
    margin-bottom: 1.25rem;
}

.modal-specs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    background-color: var(--color-blanc-casse);
    padding: 1.25rem;
    border-radius: var(--border-radius-sm);
    border-left: 3px solid var(--color-beige-sable);
    margin-bottom: 1.5rem;
}

.spec-item {
    font-size: 0.88rem;
}

.spec-item strong {
    display: block;
    font-family: var(--font-heading);
    color: var(--color-noir-charbon);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.spec-item span {
    color: var(--color-gris-graphite);
}

.modal-text {
    font-size: 0.95rem;
    color: var(--color-gris-graphite);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

/* ==========================================================================
   ESTIMATEUR INTERACTIF
   ========================================================================== */
.section-estimateur {
    background-color: var(--color-blanc-pur);
    border-top: 1px solid var(--color-gris-chaud);
}

.estimateur-card {
    display: grid;
    grid-template-columns: 1.3fr 0.9fr;
    gap: 3rem;
    background-color: var(--color-blanc-casse);
    border: 1px solid var(--color-noir-charbon);
    border-radius: var(--border-radius-lg);
    padding: 3.5rem;
    box-shadow: 8px 10px 0px rgba(21, 21, 21, 0.9);
}

.estimateur-title {
    font-family: var(--font-heading);
    font-size: 2.1rem;
    font-weight: 700;
    color: var(--color-noir-charbon);
    line-height: 1.25;
    margin-bottom: 0.85rem;
}

.estimateur-desc {
    font-size: 0.98rem;
    color: var(--color-gris-graphite);
    margin-bottom: 2rem;
}

.calc-group {
    margin-bottom: 2rem;
}

.calc-label {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-noir-charbon);
    margin-bottom: 0.75rem;
}

.calc-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.surface-val {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-noir-charbon);
    background-color: var(--color-beige-sable-light);
    padding: 0.2rem 0.65rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--color-beige-sable);
}

.calc-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.85rem;
}

.calc-btn {
    background-color: var(--color-blanc-pur);
    border: 1px solid var(--color-gris-chaud);
    padding: 1rem;
    border-radius: var(--border-radius-sm);
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.calc-btn:hover {
    border-color: var(--color-beige-sable);
    transform: translateY(-2px);
}

.calc-btn.active {
    border: 2px solid var(--color-noir-charbon);
    background-color: #FFFFFF;
    box-shadow: 0 4px 12px rgba(21, 21, 21, 0.08);
}

.opt-name {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--color-noir-charbon);
    margin-bottom: 0.25rem;
}

.opt-sub {
    display: block;
    font-size: 0.76rem;
    color: var(--color-gris-graphite);
}

/* Range slider custom */
.range-slider {
    width: 100%;
    height: 8px;
    background: var(--color-gris-chaud);
    border-radius: 4px;
    outline: none;
    -webkit-appearance: none;
}

.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-noir-charbon);
    border: 3px solid var(--color-beige-sable);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.range-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.range-scale {
    display: flex;
    justify-content: space-between;
    font-size: 0.76rem;
    color: var(--color-gris-graphite);
    margin-top: 0.5rem;
}

/* Checkbox personnalisées */
.checkbox-grid {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.custom-checkbox {
    display: flex;
    align-items: center;
    position: relative;
    padding-left: 2rem;
    cursor: pointer;
    font-size: 0.88rem;
    color: var(--color-noir-charbon);
    user-select: none;
}

.custom-checkbox input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.checkmark {
    position: absolute;
    left: 0;
    top: 2px;
    height: 18px;
    width: 18px;
    background-color: var(--color-blanc-pur);
    border: 1.5px solid var(--color-noir-charbon);
    border-radius: 2px;
}

.custom-checkbox:hover input ~ .checkmark {
    border-color: var(--color-beige-sable);
}

.custom-checkbox input:checked ~ .checkmark {
    background-color: var(--color-noir-charbon);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
    left: 5px;
    top: 1px;
    width: 4px;
    height: 9px;
    border: solid var(--color-beige-sable);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.custom-checkbox input:checked ~ .checkmark:after {
    display: block;
}

/* Résultat de l'estimateur */
.result-box {
    background-color: var(--color-noir-charbon);
    color: var(--color-blanc-casse);
    padding: 2.5rem;
    border-radius: var(--border-radius-md);
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.result-tag {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--color-beige-sable);
}

.result-badge-live {
    font-family: var(--font-heading);
    font-size: 0.68rem;
    font-weight: 700;
    background-color: #2b2b2b;
    border: 1px solid var(--color-beige-sable);
    color: var(--color-blanc-casse);
    padding: 0.2rem 0.5rem;
    border-radius: 2px;
}

.price-prefix {
    font-size: 0.88rem;
    color: var(--color-beige-sable);
}

.price-amount {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 700;
    color: #FFFFFF;
    line-height: 1.1;
    margin: 0.25rem 0;
}

.price-suffix {
    font-size: 0.78rem;
    color: #A0A0A0;
}

.result-breakdown {
    background-color: #1f1f1f;
    border-radius: var(--border-radius-sm);
    padding: 1rem;
    margin: 1.5rem 0;
    border-left: 2px solid var(--color-beige-sable);
}

.breakdown-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.82rem;
    color: #CCCCCC;
    margin-bottom: 0.4rem;
}

.breakdown-row:last-child {
    margin-bottom: 0;
}

.result-perks {
    margin-bottom: 2rem;
}

.result-perks li {
    font-size: 0.82rem;
    color: #D4D4D4;
    margin-bottom: 0.45rem;
}

.result-box .btn-primary {
    background-color: var(--color-beige-sable);
    color: var(--color-noir-charbon);
    font-weight: 700;
}

.result-box .btn-primary:hover {
    background-color: #FFFFFF;
    transform: translateY(-2px);
}

.result-note {
    font-size: 0.72rem;
    color: #888888;
    text-align: center;
    margin-top: 0.85rem;
}

/* ==========================================================================
   MÉTHODOLOGIE EN 4 ÉTAPES
   ========================================================================== */
.section-methode {
    background-color: var(--color-blanc-casse);
}

.steps-flow {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    position: relative;
}

.step-card {
    background-color: var(--color-blanc-pur);
    border: 1px solid var(--color-gris-chaud);
    border-radius: var(--border-radius-md);
    padding: 2rem 1.5rem;
    position: relative;
    transition: transform var(--transition-smooth), border-color var(--transition-smooth);
}

.step-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-noir-charbon);
}

.step-badge {
    font-family: var(--font-heading);
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--color-beige-sable);
    background-color: var(--color-noir-charbon);
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 2px;
    margin-bottom: 1.25rem;
}

.step-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius-sm);
    background-color: var(--color-gris-chaud);
    color: var(--color-noir-charbon);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
}

.step-title {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-noir-charbon);
    margin-bottom: 0.75rem;
}

.step-desc {
    font-size: 0.86rem;
    color: var(--color-gris-graphite);
    line-height: 1.55;
}

/* ==========================================================================
   TÉMOIGNAGES
   ========================================================================== */
.section-testimonials {
    background-color: var(--color-gris-chaud);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.testimonial-card {
    background-color: var(--color-blanc-pur);
    border: 1px solid rgba(21, 21, 21, 0.08);
    border-radius: var(--border-radius-md);
    padding: 2.25rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.stars {
    color: var(--color-beige-sable);
    font-size: 1.25rem;
    margin-bottom: 1rem;
    letter-spacing: 0.1em;
}

.testi-text {
    font-size: 0.94rem;
    color: var(--color-noir-charbon);
    font-style: italic;
    line-height: 1.65;
    margin-bottom: 1.75rem;
}

.testi-author {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.author-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--color-noir-charbon);
    color: var(--color-beige-sable);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.9rem;
}

.author-meta strong {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    color: var(--color-noir-charbon);
}

.author-meta span {
    font-size: 0.78rem;
    color: var(--color-gris-graphite);
}

/* ==========================================================================
   CONTACT & FORMULAIRE DE DEVIS
   ========================================================================== */
.section-contact {
    background-color: var(--color-blanc-casse);
}

.contact-card {
    display: grid;
    grid-template-columns: 0.95fr 1.25fr;
    background-color: var(--color-blanc-pur);
    border: 1px solid var(--color-noir-charbon);
    border-radius: var(--border-radius-lg);
    box-shadow: 10px 12px 0px rgba(21, 21, 21, 0.95);
    overflow: hidden;
}

.contact-info-panel {
    background-color: var(--color-noir-charbon);
    color: var(--color-blanc-casse);
    padding: 3.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.contact-heading {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 700;
    line-height: 1.25;
    color: #FFFFFF;
    margin-bottom: 1rem;
}

.contact-lead {
    font-size: 0.98rem;
    color: #CCCCCC;
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.detail-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.detail-icon {
    width: 36px;
    height: 36px;
    border-radius: 4px;
    background-color: #242424;
    color: var(--color-beige-sable);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.detail-title {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--color-beige-sable);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.detail-val {
    font-size: 0.9rem;
    color: #E0E0E0;
    margin-top: 0.2rem;
}

.guarantee-box {
    background-color: #1f1f1f;
    border-left: 3px solid var(--color-beige-sable);
    padding: 1rem;
}

.guarantee-badge {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--color-beige-sable);
    letter-spacing: 0.1em;
    margin-bottom: 0.25rem;
}

.guarantee-box p {
    font-size: 0.8rem;
    color: #B0B0B0;
    line-height: 1.4;
}

/* Panneau formulaire droit */
.contact-form-panel {
    padding: 3.5rem;
    position: relative;
    background-color: var(--color-blanc-pur);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

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

.form-group.full-width {
    grid-column: span 2;
}

.form-group label {
    font-family: var(--font-heading);
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--color-noir-charbon);
    margin-bottom: 0.45rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.8rem 1rem;
    background-color: var(--color-blanc-casse);
    border: 1px solid var(--color-gris-chaud);
    border-radius: var(--border-radius-sm);
    color: var(--color-noir-charbon);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-noir-charbon);
    background-color: var(--color-blanc-pur);
    box-shadow: 0 0 0 3px var(--color-beige-sable-light);
}

/* File Drop Zone */
.file-drop-area {
    border: 2px dashed var(--color-beige-sable);
    border-radius: var(--border-radius-sm);
    padding: 1.5rem;
    text-align: center;
    background-color: var(--color-blanc-casse);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    color: var(--color-gris-graphite);
}

.file-drop-area:hover,
.file-drop-area.dragover {
    border-color: var(--color-noir-charbon);
    background-color: var(--color-gris-chaud);
}

.file-msg {
    font-size: 0.85rem;
}

.browse-link {
    font-weight: 700;
    color: var(--color-noir-charbon);
    text-decoration: underline;
}

.file-hint {
    font-size: 0.72rem;
    color: var(--color-gris-graphite);
}

.file-list {
    margin-top: 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    width: 100%;
}

.file-item {
    font-size: 0.78rem;
    background-color: var(--color-blanc-pur);
    border: 1px solid var(--color-gris-chaud);
    padding: 0.35rem 0.65rem;
    border-radius: 3px;
    display: flex;
    justify-content: space-between;
}

.submit-btn {
    padding: 1.05rem;
    font-size: 1rem;
}

.form-privacy {
    font-size: 0.74rem;
    color: var(--color-gris-graphite);
    text-align: center;
    margin-top: 0.85rem;
}

/* Toast Succès */
.toast-success {
    position: absolute;
    inset: 2rem;
    background-color: var(--color-blanc-pur);
    border: 2px solid var(--color-noir-charbon);
    border-radius: var(--border-radius-md);
    padding: 2.5rem;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    box-shadow: var(--shadow-deep);
    z-index: 20;
    animation: fadeIn 0.3s ease;
}

.toast-success.active {
    display: flex;
}

.toast-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: var(--color-noir-charbon);
    color: var(--color-beige-sable);
    font-size: 1.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
}

.toast-content h4 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-noir-charbon);
    margin-bottom: 0.5rem;
}

.toast-content p {
    font-size: 0.95rem;
    color: var(--color-gris-graphite);
    max-width: 420px;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
    background-color: var(--color-noir-charbon);
    color: var(--color-blanc-casse);
    padding-top: 5rem;
    border-top: 2px solid var(--color-beige-sable);
}

.footer-container {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
    gap: 3rem;
    margin-bottom: 4rem;
}

.footer-brand .brand-title.light {
    color: #FFFFFF;
}

.footer-brand .brand-title.light span {
    color: var(--color-beige-sable);
}

.footer-brand .brand-subtitle.light {
    color: #999999;
}

.footer-desc {
    font-size: 0.88rem;
    color: #AAAAAA;
    margin: 1.25rem 0 1.75rem;
    line-height: 1.6;
    max-width: 360px;
}

.palette-swatch-box {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.swatch-title {
    font-family: var(--font-heading);
    font-size: 0.72rem;
    color: var(--color-beige-sable);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.swatches {
    display: flex;
    gap: 0.45rem;
}

.swatch {
    width: 22px;
    height: 22px;
    border-radius: 3px;
    border: 1px solid rgba(255, 255, 255, 0.25);
    cursor: help;
}

.footer-heading {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 700;
    color: #FFFFFF;
    margin-bottom: 1.25rem;
    letter-spacing: 0.04em;
    position: relative;
}

.footer-heading::after {
    content: '';
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-beige-sable);
    margin-top: 0.45rem;
}

.footer-links li {
    margin-bottom: 0.65rem;
}

.footer-links a {
    font-size: 0.85rem;
    color: #B5B5B5;
    transition: all var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-beige-sable);
    padding-left: 4px;
}

.footer-contact-info p {
    font-size: 0.85rem;
    color: #B5B5B5;
    margin-bottom: 0.5rem;
}

.footer-bottom {
    background-color: #0e0e0e;
    padding: 1.5rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.78rem;
    color: #888888;
}

.bottom-legal-links {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.bottom-legal-links a {
    color: #888888;
}

.bottom-legal-links a:hover {
    color: var(--color-beige-sable);
}

/* ==========================================================================
   RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================================================== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .hero-visual {
        max-width: 600px;
        margin: 0 auto;
    }

    .estimateur-card {
        grid-template-columns: 1fr;
        padding: 2.5rem;
    }

    .contact-card {
        grid-template-columns: 1fr;
    }

    .contact-info-panel, .contact-form-panel {
        padding: 2.5rem;
    }

    .steps-flow {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-container {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .topbar {
        display: none;
    }

    .header-container {
        height: 64px;
    }

    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background-color: var(--color-blanc-pur);
        border-bottom: 2px solid var(--color-noir-charbon);
        padding: 2rem 1.5rem;
        display: none;
        box-shadow: var(--shadow-deep);
    }

    .nav-menu.active {
        display: block;
    }

    .nav-list {
        flex-direction: column;
        gap: 1.25rem;
    }

    .burger-btn {
        display: flex;
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-cta-group {
        flex-direction: column;
    }

    .hero-stats {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .stat-divider {
        display: none;
    }

    .comparison-slider-box {
        height: 360px;
    }

    .calc-options {
        grid-template-columns: 1fr;
    }

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

    .form-group.full-width {
        grid-column: span 1;
    }

    .steps-flow {
        grid-template-columns: 1fr;
    }

    .footer-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-bottom-inner {
        flex-direction: column;
        gap: 0.85rem;
        text-align: center;
    }
}

/* ==========================================================================
   BOUTON FLOTTANT WHATSAPP MAROC
   ========================================================================== */
.floating-whatsapp-btn {
    position: fixed;
    bottom: 28px;
    right: 28px;
    z-index: 999;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    background-color: #25D366;
    color: #FFFFFF !important;
    padding: 0.8rem 1.25rem;
    border-radius: 50px;
    box-shadow: 0 8px 24px rgba(37, 211, 102, 0.45);
    font-family: var(--font-heading);
    font-size: 0.88rem;
    font-weight: 700;
    transition: all var(--transition-smooth);
    border: 2px solid #FFFFFF;
}

.floating-whatsapp-btn:hover {
    background-color: #128C7E;
    transform: translateY(-4px) scale(1.04);
    box-shadow: 0 12px 30px rgba(18, 140, 126, 0.55);
}

@media (max-width: 768px) {
    .floating-whatsapp-btn .whatsapp-bubble-text {
        display: none;
    }
    .floating-whatsapp-btn {
        padding: 0.8rem;
        bottom: 20px;
        right: 20px;
        border-radius: 50%;
    }
}