/* ==========================================================================
   DESIGN SYSTEM - VERT & HOME (Linen, Forest Green, Sage, Terracotta)
   ========================================================================== */

/* Typography & Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&display=swap');

:root {
    /* Color Palette */
    --clr-bg: #F7F5F0;          /* Linen Light */
    --clr-text: #1D3E2F;        /* Deep Forest Green */
    --clr-text-muted: #50685C;  /* Muted Forest Green */
    --clr-primary: #7E9D7C;     /* Sage Green */
    --clr-primary-hover: #5F7D5D;
    --clr-accent: #D4A373;      /* Terracotta / Sand */
    --clr-accent-hover: #C39263;
    --clr-secondary: #121F1A;   /* Dark Slate Green */
    --clr-card-bg: #FFFFFF;
    --clr-border: #E5E9E2;
    --clr-success: #4C9F70;
    --clr-danger: #D95D39;

    /* Fonts */
    --ff-title: 'Playfair Display', serif;
    --ff-body: 'Plus Jakarta Sans', sans-serif;

    /* Transitions */
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.2s ease;

    /* Shadows */
    --shadow-soft: 0 10px 30px rgba(29, 62, 47, 0.04);
    --shadow-medium: 0 15px 40px rgba(29, 62, 47, 0.08);

    /* Containers */
    --max-width: 1200px;
}

/* Reset & Base Styles */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    background-color: var(--clr-bg);
    color: var(--clr-text);
    font-family: var(--ff-body);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Structural Components */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

.section-dark {
    background-color: var(--clr-secondary);
    color: #F7F5F0;
}

/* Typography & Titles */
h1, h2, h3, h4, h5 {
    font-family: var(--ff-title);
    font-weight: 500;
    line-height: 1.25;
}

h2 {
    font-size: 2.8rem;
    text-align: center;
    margin-bottom: 50px;
    position: relative;
    color: var(--clr-text);
}

.section-dark h2 {
    color: #FFFFFF;
}

h2::after {
    content: '';
    display: block;
    width: 50px;
    height: 3px;
    background-color: var(--clr-accent);
    margin: 15px auto 0;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: rgba(126, 157, 124, 0.12);
    color: var(--clr-text);
    padding: 6px 18px;
    border-radius: 50px;
    font-family: var(--ff-body);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    border: 1px solid rgba(126, 157, 124, 0.25);
    margin-bottom: 20px;
    text-transform: uppercase;
}

.badge-terracotta {
    background-color: rgba(212, 163, 115, 0.12);
    color: var(--clr-accent);
    border-color: rgba(212, 163, 115, 0.25);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 36px;
    font-family: var(--ff-body);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    border: none;
    transition: var(--transition-smooth);
}

.btn-primary {
    background-color: var(--clr-primary);
    color: #FFFFFF;
    box-shadow: 0 4px 15px rgba(126, 157, 124, 0.2);
}

.btn-primary:hover {
    background-color: var(--clr-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(126, 157, 124, 0.35);
}

.btn-secondary {
    background-color: transparent;
    color: var(--clr-text);
    border: 2px solid var(--clr-text);
}

.btn-secondary:hover {
    background-color: var(--clr-text);
    color: #FFFFFF;
    transform: translateY(-2px);
}

.btn-accent {
    background-color: var(--clr-accent);
    color: #FFFFFF;
    box-shadow: 0 4px 15px rgba(212, 163, 115, 0.25);
}

.btn-accent:hover {
    background-color: var(--clr-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(212, 163, 115, 0.4);
}

.btn-outline-light {
    background-color: transparent;
    color: #FFFFFF;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline-light:hover {
    background-color: #FFFFFF;
    color: var(--clr-text);
    border-color: #FFFFFF;
    transform: translateY(-2px);
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(247, 245, 240, 0.9);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--clr-border);
    transition: var(--transition-smooth);
}

header.scrolled {
    background-color: var(--clr-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 10px 30px rgba(18, 31, 26, 0.15);
}

header.scrolled .logo {
    color: #FFFFFF;
}

header.scrolled .nav-links a {
    color: rgba(255, 255, 255, 0.8);
}

header.scrolled .nav-links a:hover {
    color: var(--clr-accent);
}

header.scrolled .menu-toggle span {
    background-color: #FFFFFF;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
    transition: var(--transition-smooth);
}

header.scrolled nav {
    padding: 16px 0;
}

.logo {
    font-family: var(--ff-title);
    font-size: 1.8rem;
    font-weight: 500;
    color: var(--clr-text);
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo span {
    color: var(--clr-primary);
}

.logo svg {
    width: 28px;
    height: 28px;
    fill: var(--clr-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-links a {
    font-family: var(--ff-body);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--clr-text-muted);
}

.nav-links a:hover {
    color: var(--clr-text);
}

.btn-header-cta {
    background-color: var(--clr-primary);
    color: #FFFFFF !important;
    padding: 10px 24px;
    border-radius: 50px;
    box-shadow: 0 4px 10px rgba(126, 157, 124, 0.15);
}

.btn-header-cta:hover {
    background-color: var(--clr-primary-hover);
    transform: translateY(-1px);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 18px;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--clr-text);
    border-radius: 1px;
    transition: var(--transition-smooth);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    padding: 180px 0 120px;
    display: flex;
    align-items: center;
    background: linear-gradient(rgba(18, 31, 26, 0.75), rgba(18, 31, 26, 0.92)), url('../assets/hero_bg.png') no-repeat center center/cover;
    color: #FFFFFF;
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 140px;
    background: linear-gradient(to top, var(--clr-bg), transparent);
    pointer-events: none;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 50px;
    align-items: center;
}

.hero-content h1 {
    font-size: 4.2rem;
    margin-bottom: 25px;
    font-weight: 500;
    line-height: 1.15;
}

.hero-content p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 40px;
    max-width: 620px;
}

.hero-btns {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.hero-visual-card {
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 24px;
    padding: 40px;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.hero-feature-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.hero-feature-icon {
    width: 48px;
    height: 48px;
    background-color: rgba(126, 157, 124, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.hero-feature-icon svg {
    width: 22px;
    height: 22px;
    fill: var(--clr-primary);
}

.hero-feature-text h4 {
    font-family: var(--ff-body);
    font-size: 1.1rem;
    color: #FFFFFF;
    font-weight: 600;
    margin-bottom: 4px;
}

.hero-feature-text p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.65);
    margin-bottom: 0;
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: var(--clr-card-bg);
    border: 1px solid var(--clr-border);
    border-radius: 24px 6px 24px 6px;
    padding: 45px;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-soft);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-medium);
    border-color: rgba(126, 157, 124, 0.2);
}

.service-icon-box {
    width: 64px;
    height: 64px;
    background-color: rgba(126, 157, 124, 0.08);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 30px;
    transition: var(--transition-smooth);
}

.service-card:hover .service-icon-box {
    background-color: var(--clr-primary);
}

.service-icon-box svg {
    width: 32px;
    height: 32px;
    fill: var(--clr-primary);
    transition: var(--transition-smooth);
}

.service-card:hover .service-icon-box svg {
    fill: #FFFFFF;
}

.service-card h3 {
    font-size: 1.6rem;
    color: var(--clr-text);
    margin-bottom: 15px;
}

.service-card p {
    color: var(--clr-text-muted);
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* Portfolio Section */
.portfolio-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 40px;
    color: var(--clr-text-muted);
}

.portfolio-filter-bar {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    margin-bottom: 50px;
}

.filter-btn {
    padding: 10px 24px;
    border-radius: 50px;
    border: 1px solid var(--clr-border);
    background-color: var(--clr-card-bg);
    color: var(--clr-text-muted);
    font-family: var(--ff-body);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--clr-primary);
    color: #FFFFFF;
    border-color: var(--clr-primary);
    box-shadow: 0 4px 12px rgba(126, 157, 124, 0.2);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.portfolio-item {
    background-color: var(--clr-card-bg);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--clr-border);
    transition: var(--transition-smooth);
    display: block;
}

.portfolio-item.hidden {
    display: none;
}

.portfolio-img-box {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
}

.portfolio-img-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.portfolio-item:hover .portfolio-img-box img {
    transform: scale(1.05);
}

.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(18, 31, 26, 0.9), transparent 70%);
    opacity: 0;
    display: flex;
    align-items: flex-end;
    padding: 24px;
    transition: var(--transition-smooth);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-tag {
    background-color: var(--clr-accent);
    color: #FFFFFF;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 4px 10px;
    border-radius: 4px;
    margin-bottom: 8px;
    display: inline-block;
}

.portfolio-overlay h4 {
    color: #FFFFFF;
    font-size: 1.3rem;
    font-family: var(--ff-body);
    font-weight: 600;
}

.portfolio-details {
    padding: 24px;
}

.portfolio-details h3 {
    font-family: var(--ff-body);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--clr-text);
    margin-bottom: 8px;
}

.portfolio-details p {
    color: var(--clr-text-muted);
    font-size: 0.9rem;
}

/* Lightbox Modal */
.lightbox {
    position: fixed;
    inset: 0;
    background-color: rgba(18, 31, 26, 0.95);
    z-index: 2000;
    display: none;
    justify-content: center;
    align-items: center;
    padding: 40px;
}

.lightbox.active {
    display: flex;
}

.lightbox-content {
    max-width: 900px;
    width: 100%;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.lightbox-img {
    width: 100%;
    max-height: 75vh;
    object-fit: contain;
    border-radius: 12px;
    border: 3px solid #FFFFFF;
}

.lightbox-close {
    position: absolute;
    top: -45px;
    right: 0;
    color: #FFFFFF;
    font-size: 2.5rem;
    cursor: pointer;
    background: none;
    border: none;
    transition: var(--transition-fast);
}

.lightbox-close:hover {
    color: var(--clr-accent);
}

.lightbox-caption {
    color: #FFFFFF;
    text-align: center;
    font-family: var(--ff-title);
    font-size: 1.4rem;
}

/* Process Timeline Section */
.process-timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    padding: 40px 0;
}

.process-timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background-color: var(--clr-border);
    transform: translateX(-50%);
}

.timeline-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    margin-bottom: 60px;
    position: relative;
    align-items: center;
}

.timeline-item:nth-child(even) .timeline-card {
    grid-column: 2;
}

.timeline-item:nth-child(even) .timeline-info {
    grid-column: 1;
    grid-row: 1;
    text-align: right;
}

.timeline-node {
    width: 40px;
    height: 40px;
    background-color: var(--clr-bg);
    border: 3px solid var(--clr-primary);
    color: var(--clr-primary);
    border-radius: 50%;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--ff-body);
    font-weight: 700;
    font-size: 1.1rem;
    z-index: 5;
    transition: var(--transition-smooth);
}

.timeline-item.active .timeline-node {
    background-color: var(--clr-primary);
    color: #FFFFFF;
    box-shadow: 0 0 15px rgba(126, 157, 124, 0.4);
}

.timeline-card {
    background-color: var(--clr-card-bg);
    border: 1px solid var(--clr-border);
    border-radius: 16px;
    padding: 30px;
    box-shadow: var(--shadow-soft);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.timeline-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
    border-color: var(--clr-primary);
}

.timeline-card h4 {
    font-size: 1.3rem;
    color: var(--clr-text);
    margin-bottom: 8px;
}

.timeline-card p {
    color: var(--clr-text-muted);
    font-size: 0.95rem;
    margin-bottom: 0;
}

.timeline-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out;
}

.timeline-card.open .timeline-details {
    max-height: 300px;
    border-top: 1px dashed var(--clr-border);
    margin-top: 15px;
    padding-top: 15px;
}

.timeline-details ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.timeline-details li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--clr-text);
    font-weight: 500;
}

.timeline-details li svg {
    width: 14px;
    height: 14px;
    fill: var(--clr-primary);
}

/* Zone d'intervention Section */
.zone-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.zone-text h3 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.zone-text p {
    color: var(--clr-text-muted);
    margin-bottom: 30px;
}

.zone-checker {
    background-color: #FFFFFF;
    padding: 30px;
    border-radius: 16px;
    border: 1px solid var(--clr-border);
    box-shadow: var(--shadow-soft);
    margin-bottom: 30px;
}

.zone-input-group {
    display: flex;
    gap: 12px;
}

.zone-input-group input {
    flex-grow: 1;
    padding: 14px 20px;
    border: 1px solid var(--clr-border);
    border-radius: 50px;
    font-size: 1rem;
    font-family: var(--ff-body);
}

.zone-input-group input:focus {
    outline: none;
    border-color: var(--clr-primary);
}

.zone-result {
    margin-top: 15px;
    min-height: 40px;
    display: flex;
    align-items: center;
    font-weight: 600;
    font-size: 0.95rem;
}

.result-success {
    color: var(--clr-success);
    display: flex;
    align-items: center;
    gap: 10px;
}

.result-error {
    color: var(--clr-danger);
    display: flex;
    align-items: center;
    gap: 10px;
}

.result-info {
    color: var(--clr-text-muted);
}

.zone-cities {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.zone-cities span {
    background-color: var(--clr-card-bg);
    border: 1px solid var(--clr-border);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--clr-text);
    font-weight: 500;
}

.zone-map-placeholder {
    height: 100%;
    min-height: 400px;
    background-color: var(--clr-secondary);
    border-radius: 24px;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Blueprint / Technical Map Style */
.blueprint-map {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, #1b2f25 0%, #0c1511 100%);
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 20px 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: rgba(255, 255, 255, 0.8);
    text-align: center;
    padding: 30px;
}

.map-circle {
    width: 200px;
    height: 200px;
    border: 2px dashed rgba(126, 157, 124, 0.4);
    border-radius: 50%;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: spin 80s linear infinite;
    margin-bottom: 20px;
}

.map-circle::before {
    content: '';
    position: absolute;
    width: 140px;
    height: 140px;
    border: 2px solid rgba(255, 255, 255, 0.08);
    border-radius: 50%;
}

.map-circle::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background-color: var(--clr-accent);
    border-radius: 50%;
    box-shadow: 0 0 15px var(--clr-accent);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.map-pin-lyon {
    position: absolute;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: #FFFFFF;
}

.map-pin-lyon svg {
    width: 32px;
    height: 32px;
    fill: var(--clr-accent);
    filter: drop-shadow(0 2px 5px rgba(0,0,0,0.5));
}

.map-pin-lyon span {
    font-family: var(--ff-body);
    font-weight: 600;
    background-color: var(--clr-accent);
    padding: 3px 12px;
    border-radius: 50px;
    font-size: 0.8rem;
    margin-top: 5px;
}

/* Quote Estimator Section */
.devis-grid {
    display: grid;
    grid-template-columns: 0.95fr 1.05fr;
    gap: 60px;
}

.devis-info h3 {
    font-size: 2.2rem;
    margin-bottom: 25px;
}

.devis-info p {
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 35px;
}

.devis-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 40px;
}

.devis-feature-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.devis-feature-item .icon-wrapper {
    width: 44px;
    height: 44px;
    background-color: rgba(255, 255, 255, 0.04);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.devis-feature-item .icon-wrapper svg {
    width: 20px;
    height: 20px;
    fill: var(--clr-accent);
}

.devis-feature-item h4 {
    color: #FFFFFF;
    font-family: var(--ff-body);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.devis-feature-item p {
    color: rgba(255, 255, 255, 0.55);
    font-size: 0.9rem;
    margin-bottom: 0;
}

.devis-phone-box {
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.devis-phone-icon {
    width: 48px;
    height: 48px;
    background-color: var(--clr-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.devis-phone-icon svg {
    width: 22px;
    height: 22px;
    fill: #FFFFFF;
}

.devis-phone-text span {
    display: block;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.devis-phone-text a {
    font-family: var(--ff-body);
    font-weight: 700;
    font-size: 1.7rem;
    color: #FFFFFF;
}

.devis-phone-text a:hover {
    color: var(--clr-accent);
}

/* Calculator Stepper */
.calculator-container {
    background-color: #FFFFFF;
    border-radius: 24px;
    padding: 40px;
    color: var(--clr-text);
    box-shadow: 0 20px 45px rgba(18, 31, 26, 0.2);
}

.calc-steps {
    display: flex;
    justify-content: space-between;
    margin-bottom: 35px;
    position: relative;
}

.calc-steps::before {
    content: '';
    position: absolute;
    top: 15px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--clr-border);
    z-index: 1;
}

.calc-step {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.step-num {
    width: 32px;
    height: 32px;
    background-color: var(--clr-bg);
    border: 2px solid var(--clr-border);
    color: var(--clr-text-muted);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    transition: var(--transition-smooth);
}

.calc-step.active .step-num {
    background-color: var(--clr-primary);
    border-color: var(--clr-primary);
    color: #FFFFFF;
    box-shadow: 0 0 10px rgba(126, 157, 124, 0.3);
}

.calc-step.completed .step-num {
    background-color: var(--clr-text);
    border-color: var(--clr-text);
    color: #FFFFFF;
}

.step-label {
    font-family: var(--ff-body);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--clr-text-muted);
    transition: var(--transition-smooth);
    font-weight: 600;
}

.calc-step.active .step-label {
    color: var(--clr-primary);
}

.calc-panel {
    display: none;
}

.calc-panel.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

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

.calc-panel h4 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--clr-border);
    padding-bottom: 10px;
}

/* Service cards grid */
.calc-service-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.calc-service-card {
    border: 2px solid var(--clr-border);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    text-align: center;
    transition: var(--transition-smooth);
}

.calc-service-card:hover {
    border-color: var(--clr-primary);
    background-color: rgba(126, 157, 124, 0.02);
}

.calc-service-card.selected {
    border-color: var(--clr-primary);
    background-color: rgba(126, 157, 124, 0.05);
}

.calc-service-card svg {
    width: 32px;
    height: 32px;
    fill: var(--clr-text-muted);
    transition: var(--transition-smooth);
}

.calc-service-card.selected svg {
    fill: var(--clr-primary);
}

.calc-service-card span {
    font-family: var(--ff-body);
    font-size: 0.95rem;
    font-weight: 700;
}

/* Custom range slide styling */
.calc-range-wrapper {
    padding: 20px 0;
}

.range-labels {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
}

.range-val {
    font-family: var(--ff-title);
    font-size: 2.4rem;
    font-weight: 500;
    color: var(--clr-primary);
}

.range-val span {
    font-family: var(--ff-body);
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--clr-text-muted);
}

.custom-range {
    width: 100%;
    height: 6px;
    background: var(--clr-border);
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

.custom-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--clr-primary);
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
    transition: var(--transition-fast);
}

.custom-range::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

/* Material Select Cards */
.calc-material-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
}

.calc-material-card {
    border: 2px solid var(--clr-border);
    border-radius: 12px;
    padding: 20px;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 20px;
    align-items: center;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.calc-material-card:hover {
    border-color: var(--clr-primary);
    background-color: rgba(126, 157, 124, 0.02);
}

.calc-material-card.selected {
    border-color: var(--clr-primary);
    background-color: rgba(126, 157, 124, 0.05);
}

.material-radio {
    width: 20px;
    height: 20px;
    border: 2px solid var(--clr-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.calc-material-card.selected .material-radio {
    border-color: var(--clr-primary);
}

.calc-material-card.selected .material-radio::after {
    content: '';
    display: block;
    width: 10px;
    height: 10px;
    background-color: var(--clr-primary);
    border-radius: 50%;
}

.material-card-details h5 {
    font-family: var(--ff-body);
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.material-card-details p {
    font-size: 0.85rem;
    color: var(--clr-text-muted);
}

/* Form input styling */
.calc-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

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

.calc-input-wrapper {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.calc-input-wrapper label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--clr-text);
}

.calc-input-wrapper input,
.calc-input-wrapper textarea {
    padding: 12px 18px;
    border: 1px solid var(--clr-border);
    border-radius: 50px;
    font-size: 0.95rem;
    font-family: var(--ff-body);
}

.calc-input-wrapper input:focus,
.calc-input-wrapper textarea:focus {
    outline: none;
    border-color: var(--clr-primary);
}

.calc-input-wrapper textarea {
    border-radius: 16px;
    resize: vertical;
    min-height: 80px;
}

/* Summary Panel Box */
.calc-summary {
    background-color: var(--clr-bg);
    border-radius: 12px;
    padding: 25px;
    margin-top: 30px;
    border-left: 4px solid var(--clr-accent);
}

.summary-title {
    font-family: var(--ff-body);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--clr-text-muted);
    font-weight: 700;
    margin-bottom: 12px;
}

.summary-flex {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 15px;
}

.summary-details p {
    font-size: 0.9rem;
    margin-bottom: 4px;
    font-weight: 500;
}

.summary-details p span {
    font-weight: 700;
    color: var(--clr-text);
}

.summary-price {
    text-align: right;
}

.price-range {
    font-family: var(--ff-title);
    font-size: 2.2rem;
    font-weight: 500;
    color: var(--clr-accent);
    line-height: 1.1;
}

.price-note {
    font-size: 0.8rem;
    color: var(--clr-text-muted);
    margin-top: 4px;
}

/* Form navigation controls */
.calc-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
    border-top: 1px solid var(--clr-border);
    padding-top: 25px;
}

/* Footer Section */
footer {
    background-color: var(--clr-secondary);
    color: rgba(247, 245, 240, 0.6);
    padding: 80px 0 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.25fr 0.75fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand .logo {
    color: #FFFFFF;
    margin-bottom: 25px;
}

.footer-brand p {
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 30px;
}

.footer-socials {
    display: flex;
    gap: 15px;
}

.footer-socials a {
    width: 42px;
    height: 42px;
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFFFF;
}

.footer-socials a:hover {
    background-color: var(--clr-accent);
    border-color: var(--clr-accent);
    transform: translateY(-3px);
}

.footer-socials a svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.footer-links h4,
.footer-contact h4 {
    color: #FFFFFF;
    font-size: 1.15rem;
    margin-bottom: 25px;
    position: relative;
    display: inline-block;
    font-family: var(--ff-body);
    font-weight: 700;
}

.footer-links h4::after,
.footer-contact h4::after {
    content: '';
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--clr-accent);
    margin-top: 8px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.footer-links a {
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--clr-accent);
    padding-left: 5px;
}

.footer-contact-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    font-size: 0.95rem;
}

.footer-contact-item svg {
    width: 18px;
    height: 18px;
    fill: var(--clr-accent);
    margin-top: 3px;
    flex-shrink: 0;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 0.85rem;
}

.footer-bottom a:hover {
    color: var(--clr-accent);
}

/* Responsive Grid and elements */
@media (max-width: 992px) {
    html {
        font-size: 15px;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: 50px;
        text-align: center;
    }

    .hero-content p {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-btns {
        justify-content: center;
    }

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

    .devis-grid,
    .zone-grid,
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }

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

    .zone-map-placeholder {
        min-height: 350px;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--clr-secondary);
        flex-direction: column;
        padding: 30px 24px;
        gap: 20px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        box-shadow: 0 15px 30px rgba(18, 31, 26, 0.2);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links a {
        color: rgba(255, 255, 255, 0.8);
        width: 100%;
        text-align: center;
        padding: 10px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    }

    .btn-header-cta {
        border-bottom: none !important;
        margin-top: 10px;
    }

    .menu-toggle.open span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .menu-toggle.open span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.open span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    header:not(.scrolled) .menu-toggle.open span {
        background-color: #FFFFFF;
    }

    header:not(.scrolled) .nav-links a {
        color: rgba(255, 255, 255, 0.8);
    }

    .hero-content h1 {
        font-size: 3rem;
    }

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

    /* Process Timeline Stacked on mobile */
    .process-timeline::before {
        left: 20px;
    }

    .timeline-item {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-bottom: 40px;
    }

    .timeline-item:nth-child(even) .timeline-card {
        grid-column: 1;
    }

    .timeline-item:nth-child(even) .timeline-info {
        grid-column: 1;
        text-align: left;
    }

    .timeline-node {
        left: 20px;
        top: 0;
        transform: translate(-50%, 0);
    }

    .timeline-card {
        margin-left: 45px;
    }

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

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

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

    .calculator-container {
        padding: 25px 20px;
    }

    .step-label {
        display: none; /* Hide stepper text labels on mobile to avoid overflow */
    }

    .calc-steps::before {
        top: 16px;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2.4rem;
    }

    .btn {
        width: 100%;
    }

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

    .zone-input-group {
        flex-direction: column;
    }

    .zone-input-group button {
        width: 100%;
        padding: 14px 0;
    }

    .price-range {
        font-size: 1.8rem;
    }
}