/* ===================================
   MLK CONSULTING - Charte Graphique
   =================================== */

/* CSS Variables - Palette de couleurs */
:root {
    /* Couleurs principales */
    --bleu-mlk: #0A1F33;
    --blanc-mlk: #FFFFFF;
    --gris-neutre: #F4F7FA;
    --accent-bleu: #2D88FF;
    --anthracite: #1A1A1A;

    /* Couleurs secondaires */
    --gris-bordure: #E0E6EE;
    --gris-texte: #6B7280;

    /* Couleurs BU */
    --bu-infra: #4A90D9;
    --bu-cloud: #5DADE2;
    --bu-ia: #9B59B6;
    --bu-devops: #E67E22;
    --bu-securite: #27AE60;
    --bu-strategie: #E74C3C;

    /* Typographie */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Espacements */
    --container-width: 1200px;
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 80px;

    /* Autres */
    --border-radius: 8px;
    --border-radius-sm: 6px;
    --transition: all 0.3s ease;
    --shadow: 0 4px 6px rgba(10, 31, 51, 0.1);
    --shadow-hover: 0 10px 25px rgba(10, 31, 51, 0.15);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--anthracite);
    background-color: var(--blanc-mlk);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--bleu-mlk);
}

h1 { font-size: 42px; }
h2 { font-size: 32px; font-weight: 600; }
h3 { font-size: 24px; font-weight: 600; }
h4 { font-size: 18px; font-weight: 600; }

p { margin-bottom: 1em; }
p:last-child { margin-bottom: 0; }

a {
    color: var(--accent-bleu);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--bleu-mlk);
}

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

ul {
    list-style: none;
}

/* Container */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--bleu-mlk);
    color: var(--blanc-mlk);
    border-color: var(--bleu-mlk);
}

.btn-primary:hover {
    background-color: var(--accent-bleu);
    border-color: var(--accent-bleu);
    color: var(--blanc-mlk);
}

.btn-secondary {
    background-color: var(--blanc-mlk);
    color: var(--bleu-mlk);
    border-color: var(--blanc-mlk);
}

.btn-secondary:hover {
    background-color: var(--gris-neutre);
    border-color: var(--gris-neutre);
    color: var(--bleu-mlk);
}

.btn-outline {
    background-color: transparent;
    color: var(--blanc-mlk);
    border-color: var(--blanc-mlk);
}

.btn-outline:hover {
    background-color: var(--blanc-mlk);
    color: var(--bleu-mlk);
}

.btn-outline-dark {
    background-color: transparent;
    color: var(--bleu-mlk);
    border-color: var(--bleu-mlk);
}

.btn-outline-dark:hover {
    background-color: var(--bleu-mlk);
    color: var(--blanc-mlk);
}

.btn-large {
    padding: 16px 32px;
    font-size: 18px;
}

/* ===================================
   HEADER
   =================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--bleu-mlk);
    padding: 16px 0;
    transition: var(--transition);
}

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

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

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

.logo-img {
    height: 40px;
    width: auto;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-family: var(--font-heading);
    font-size: 15px;
    font-weight: 500;
    color: var(--blanc-mlk);
    padding: 8px 0;
    position: relative;
}

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

.nav-link:hover,
.nav-link.active {
    color: var(--accent-bleu);
}

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

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--blanc-mlk);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-hover);
    min-width: 220px;
    padding: 12px 0;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    margin-top: 16px;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    margin-top: 8px;
}

.dropdown-menu li a {
    display: block;
    padding: 10px 20px;
    color: var(--anthracite);
    font-size: 14px;
}

.dropdown-menu li a:hover {
    background-color: var(--gris-neutre);
    color: var(--accent-bleu);
}

.nav-cta {
    margin-left: 16px;
}

/* Mobile Navigation */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--blanc-mlk);
    transition: var(--transition);
}

/* ===================================
   HERO SECTION
   =================================== */
.hero {
    background: linear-gradient(to top, rgba(255, 255, 255, 0.15) 0%, rgba(255, 255, 255, 0.08) 8%, rgba(255, 255, 255, 0.03) 15%, rgba(255, 255, 255, 0) 25%, var(--bleu-mlk) 25%);
    background-color: var(--bleu-mlk);
    padding: 160px 0 100px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 350px;
    background: linear-gradient(to top,
        rgba(255, 255, 255, 1) 0%,
        rgba(255, 255, 255, 0.95) 5%,
        rgba(255, 255, 255, 0.7) 15%,
        rgba(255, 255, 255, 0.4) 30%,
        rgba(255, 255, 255, 0.15) 50%,
        rgba(255, 255, 255, 0.05) 70%,
        transparent 100%);
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-text h1 {
    color: var(--blanc-mlk);
    font-size: 48px;
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.hero-subtitle {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: var(--spacing-lg);
}

.tag {
    display: inline-block;
    padding: 6px 14px;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--blanc-mlk);
    font-size: 14px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Hero Visual - Cards Grid */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    max-width: 400px;
}

.hero-card {
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    padding: 24px 16px;
    text-align: center;
    color: var(--blanc-mlk);
    transition: var(--transition);
}

.hero-card:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-5px);
}

.hero-card svg {
    margin-bottom: 8px;
}

.hero-card span {
    display: block;
    font-size: 12px;
    font-weight: 500;
}

.hero-card[data-bu="infra"] { border-color: var(--bu-infra); }
.hero-card[data-bu="cloud"] { border-color: var(--bu-cloud); }
.hero-card[data-bu="ia"] { border-color: var(--bu-ia); }
.hero-card[data-bu="devops"] { border-color: var(--bu-devops); }
.hero-card[data-bu="securite"] { border-color: var(--bu-securite); }
.hero-card[data-bu="strategie"] { border-color: var(--bu-strategie); }

.hero-card[data-bu="infra"]:hover { background-color: rgba(74, 144, 217, 0.3); border-color: var(--bu-infra); }
.hero-card[data-bu="cloud"]:hover { background-color: rgba(93, 173, 226, 0.3); border-color: var(--bu-cloud); }
.hero-card[data-bu="ia"]:hover { background-color: rgba(155, 89, 182, 0.3); border-color: var(--bu-ia); }
.hero-card[data-bu="devops"]:hover { background-color: rgba(230, 126, 34, 0.3); border-color: var(--bu-devops); }
.hero-card[data-bu="securite"]:hover { background-color: rgba(39, 174, 96, 0.3); border-color: var(--bu-securite); }
.hero-card[data-bu="strategie"]:hover { background-color: rgba(231, 76, 60, 0.3); border-color: var(--bu-strategie); }

.hero-card svg {
    transition: var(--transition);
}

.hero-card:hover svg {
    transform: scale(1.1);
}

/* ===================================
   SECTIONS COMMON
   =================================== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-header h2 {
    margin-bottom: 12px;
}

.section-header p {
    color: var(--gris-texte);
    font-size: 18px;
    max-width: 600px;
    margin: 0 auto;
}

/* ===================================
   EXPERTISES SECTION
   =================================== */
.expertises {
    padding: var(--spacing-xl) 0;
    background-color: var(--blanc-mlk);
}

.expertises-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.expertise-card {
    background-color: var(--blanc-mlk);
    border: 1px solid var(--gris-bordure);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: var(--transition);
    text-decoration: none;
    display: block;
}

.expertise-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-5px);
    border-color: transparent;
}

.expertise-icon {
    width: 60px;
    height: 60px;
    background-color: var(--gris-neutre);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
    color: var(--bleu-mlk);
    transition: var(--transition);
}

.expertise-card:hover .expertise-icon {
    background-color: var(--bleu-mlk);
    color: var(--blanc-mlk);
}

.expertise-card h3 {
    font-size: 20px;
    margin-bottom: 8px;
    color: var(--bleu-mlk);
}

.expertise-card p {
    color: var(--gris-texte);
    font-size: 15px;
    margin-bottom: var(--spacing-sm);
}

.expertise-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--accent-bleu);
    font-weight: 500;
    font-size: 14px;
}

.expertise-link svg {
    transition: var(--transition);
}

.expertise-card:hover .expertise-link svg {
    transform: translateX(4px);
}

/* BU Colors */
.expertise-card[data-bu="infra"]:hover { border-left: 4px solid var(--bu-infra); }
.expertise-card[data-bu="cloud"]:hover { border-left: 4px solid var(--bu-cloud); }
.expertise-card[data-bu="ia"]:hover { border-left: 4px solid var(--bu-ia); }
.expertise-card[data-bu="devops"]:hover { border-left: 4px solid var(--bu-devops); }
.expertise-card[data-bu="securite"]:hover { border-left: 4px solid var(--bu-securite); }
.expertise-card[data-bu="strategie"]:hover { border-left: 4px solid var(--bu-strategie); }

.expertise-card[data-bu="infra"]:hover .expertise-icon { background-color: var(--bu-infra); }
.expertise-card[data-bu="cloud"]:hover .expertise-icon { background-color: var(--bu-cloud); }
.expertise-card[data-bu="ia"]:hover .expertise-icon { background-color: var(--bu-ia); }
.expertise-card[data-bu="devops"]:hover .expertise-icon { background-color: var(--bu-devops); }
.expertise-card[data-bu="securite"]:hover .expertise-icon { background-color: var(--bu-securite); }
.expertise-card[data-bu="strategie"]:hover .expertise-icon { background-color: var(--bu-strategie); }

.expertise-icon svg {
    transition: var(--transition);
}

.expertise-card:hover .expertise-icon svg {
    transform: scale(1.1);
}

/* ===================================
   WHY MLK SECTION
   =================================== */
.why-mlk {
    padding: var(--spacing-xl) 0;
    background-color: var(--gris-neutre);
}

.pillars-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.pillar {
    text-align: center;
    padding: var(--spacing-md);
}

.pillar-icon {
    width: 80px;
    height: 80px;
    background-color: var(--blanc-mlk);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-sm);
    color: var(--accent-bleu);
    box-shadow: var(--shadow);
}

.pillar h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.pillar p {
    color: var(--gris-texte);
    font-size: 14px;
}

/* ===================================
   REFERENCES SECTION
   =================================== */
.references {
    padding: var(--spacing-xl) 0;
    background-color: var(--blanc-mlk);
}

.references-carousel {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.reference-card {
    background-color: var(--gris-neutre);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: var(--transition);
}

.reference-card:hover {
    box-shadow: var(--shadow);
}

.reference-type {
    display: inline-block;
    background-color: var(--bleu-mlk);
    color: var(--blanc-mlk);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    margin-bottom: 12px;
}

.reference-context {
    font-size: 18px;
    font-weight: 600;
    color: var(--bleu-mlk);
    margin-bottom: 12px;
}

.reference-details {
    margin-bottom: 16px;
    padding-left: 20px;
}

.reference-details li {
    position: relative;
    font-size: 14px;
    color: var(--gris-texte);
    margin-bottom: 6px;
    list-style: disc;
}

.reference-result {
    padding-top: 12px;
    border-top: 1px solid var(--gris-bordure);
    font-size: 14px;
}

.reference-result strong {
    color: var(--accent-bleu);
    font-size: 24px;
    font-weight: 700;
}

.references-cta {
    text-align: center;
}

/* ===================================
   METHODOLOGY SECTION
   =================================== */
.methodology {
    padding: var(--spacing-xl) 0;
    background-color: var(--bleu-mlk);
}

.methodology .section-header h2,
.methodology .section-header p {
    color: var(--blanc-mlk);
}

.methodology-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    position: relative;
}

.methodology-steps::before {
    content: '';
    position: absolute;
    top: 50px;
    left: 12.5%;
    right: 12.5%;
    height: 2px;
    background-color: rgba(255, 255, 255, 0.2);
}

.methodology-step {
    text-align: center;
    position: relative;
}

.step-number {
    width: 40px;
    height: 40px;
    background-color: var(--accent-bleu);
    color: var(--blanc-mlk);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    position: relative;
    z-index: 1;
}

.step-icon {
    width: 70px;
    height: 70px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    color: var(--blanc-mlk);
}

.methodology-step h3 {
    color: var(--blanc-mlk);
    font-size: 16px;
    margin-bottom: 8px;
}

.methodology-step p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

/* ===================================
   ABOUT SECTION
   =================================== */
.about {
    padding: var(--spacing-xl) 0;
    background-color: var(--gris-neutre);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-image {
    display: flex;
    justify-content: center;
}

.about-placeholder {
    width: 250px;
    height: 250px;
    background-color: var(--blanc-mlk);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gris-bordure);
    box-shadow: var(--shadow);
}

.about-text h2 {
    margin-bottom: var(--spacing-sm);
}

.about-text p {
    color: var(--gris-texte);
    margin-bottom: var(--spacing-sm);
}

.about-text .btn {
    margin-top: var(--spacing-sm);
}

/* ===================================
   CONTACT SECTION
   =================================== */
.contact {
    padding: var(--spacing-xl) 0;
    background-color: var(--blanc-mlk);
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
}

.contact-text {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.contact-text h2 {
    margin-bottom: 12px;
}

.contact-text p {
    color: var(--gris-texte);
    font-size: 18px;
}

.contact-form {
    background-color: var(--gris-neutre);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--bleu-mlk);
    font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--gris-bordure);
    border-radius: var(--border-radius-sm);
    font-family: var(--font-body);
    font-size: 16px;
    transition: var(--transition);
    background-color: var(--blanc-mlk);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-bleu);
    box-shadow: 0 0 0 3px rgba(45, 136, 255, 0.1);
}

.contact-form .btn {
    width: 100%;
}

/* ===================================
   FOOTER
   =================================== */
.footer {
    background-color: var(--bleu-mlk);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    color: var(--blanc-mlk);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    height: 50px;
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.footer-column h4 {
    color: var(--blanc-mlk);
    font-size: 16px;
    margin-bottom: var(--spacing-sm);
}

.footer-column ul li {
    margin-bottom: 8px;
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    transition: var(--transition);
}

.footer-column ul li a:hover {
    color: var(--accent-bleu);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

.footer-legal {
    display: flex;
    gap: var(--spacing-md);
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

.footer-legal a:hover {
    color: var(--accent-bleu);
}

/* ===================================
   PAGE HERO (for internal pages)
   =================================== */
.page-hero {
    background-color: var(--bleu-mlk);
    padding: 140px 0 60px;
    text-align: center;
}

.page-hero h1 {
    color: var(--blanc-mlk);
    font-size: 42px;
    margin-bottom: 16px;
}

.page-hero p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 20px;
    max-width: 700px;
    margin: 0 auto var(--spacing-md);
}

.page-hero .btn {
    margin-top: var(--spacing-sm);
}

/* ===================================
   BU PAGE SPECIFIC
   =================================== */
.bu-challenges {
    padding: var(--spacing-xl) 0;
    background-color: var(--blanc-mlk);
}

.challenges-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.challenge-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: var(--spacing-md);
    background-color: var(--gris-neutre);
    border-radius: var(--border-radius);
}

.challenge-icon {
    width: 48px;
    height: 48px;
    background-color: var(--bleu-mlk);
    color: var(--blanc-mlk);
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.challenge-item h4 {
    margin-bottom: 4px;
}

.challenge-item p {
    color: var(--gris-texte);
    font-size: 14px;
}

/* Services Grid */
.bu-services {
    padding: var(--spacing-xl) 0;
    background-color: var(--gris-neutre);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.service-card {
    background-color: var(--blanc-mlk);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    text-align: center;
    transition: var(--transition);
}

.service-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px);
}

.service-card h4 {
    margin-bottom: 8px;
}

.service-card p {
    color: var(--gris-texte);
    font-size: 14px;
}

/* Use Cases */
.bu-usecases {
    padding: var(--spacing-xl) 0;
    background-color: var(--blanc-mlk);
}

.usecases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.usecase-card {
    border: 1px solid var(--gris-bordure);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: var(--transition);
}

.usecase-card:hover {
    border-color: var(--accent-bleu);
}

.usecase-card h4 {
    margin-bottom: 8px;
}

.usecase-card p {
    color: var(--gris-texte);
    font-size: 14px;
}

/* Approach */
.bu-approach {
    padding: var(--spacing-xl) 0;
    background-color: var(--bleu-mlk);
}

.bu-approach .section-header h2,
.bu-approach .section-header p {
    color: var(--blanc-mlk);
}

.approach-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.approach-step {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    text-align: center;
}

.approach-step .step-num {
    width: 36px;
    height: 36px;
    background-color: var(--accent-bleu);
    color: var(--blanc-mlk);
    font-family: var(--font-heading);
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
}

.approach-step h4 {
    color: var(--blanc-mlk);
    margin-bottom: 8px;
}

.approach-step p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

/* Benefits */
.bu-benefits {
    padding: var(--spacing-xl) 0;
    background-color: var(--gris-neutre);
}

.benefits-list {
    max-width: 800px;
    margin: 0 auto;
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--gris-bordure);
}

.benefit-item:last-child {
    border-bottom: none;
}

.benefit-icon {
    width: 40px;
    height: 40px;
    background-color: var(--accent-bleu);
    color: var(--blanc-mlk);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.benefit-item p {
    font-size: 16px;
    font-weight: 500;
}

/* CTA Banner */
.cta-banner {
    padding: var(--spacing-lg) 0;
    background-color: var(--bleu-mlk);
    text-align: center;
}

.cta-banner h2 {
    color: var(--blanc-mlk);
    font-size: 28px;
    margin-bottom: var(--spacing-sm);
}

.cta-banner p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-md);
}

/* ===================================
   RESPONSIVE
   =================================== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 36px;
    }

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

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

    .hero-visual {
        display: none;
    }

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

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

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

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

    .methodology-steps::before {
        display: none;
    }

    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

    .footer-brand {
        max-width: none;
        text-align: center;
        margin-bottom: var(--spacing-md);
    }

    .challenges-list,
    .services-grid,
    .usecases-grid,
    .approach-steps {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    h1 { font-size: 32px; }
    h2 { font-size: 26px; }
    h3 { font-size: 20px; }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 350px;
        height: 100vh;
        background-color: var(--bleu-mlk);
        flex-direction: column;
        padding: 80px 24px 24px;
        gap: 0;
        transition: var(--transition);
        box-shadow: var(--shadow-hover);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-link {
        display: block;
        padding: 16px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .dropdown-menu {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        background-color: transparent;
        box-shadow: none;
        padding: 0;
        margin-top: 0;
        padding-left: 20px;
    }

    .dropdown-menu li a {
        color: rgba(255, 255, 255, 0.7);
        padding: 12px 0;
    }

    .nav-cta {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: 120px 0 60px;
        min-height: auto;
    }

    .hero-text h1 {
        font-size: 28px;
    }

    .expertises-grid,
    .pillars-grid,
    .references-carousel,
    .methodology-steps,
    .challenges-list,
    .services-grid,
    .usecases-grid,
    .approach-steps {
        grid-template-columns: 1fr;
    }

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

    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-column {
        margin-bottom: var(--spacing-md);
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }

    .page-hero {
        padding: 120px 0 40px;
    }

    .page-hero h1 {
        font-size: 32px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }

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

    .hero-cta .btn {
        width: 100%;
    }

    .contact-form {
        padding: var(--spacing-md);
    }

    .page-hero h1 {
        font-size: 26px;
    }

    .page-hero p {
        font-size: 16px;
    }

    .section-header h2 {
        font-size: 24px;
    }

    .section-header p {
        font-size: 16px;
    }

    .cta-banner h2 {
        font-size: 22px;
    }

    .pillar {
        padding: var(--spacing-sm);
    }

    .pillar-icon {
        width: 60px;
        height: 60px;
    }

    .pillar-icon svg {
        width: 30px;
        height: 30px;
    }

    .about-placeholder {
        width: 180px;
        height: 180px;
    }

    .benefit-item {
        flex-direction: column;
        text-align: center;
    }

    .challenge-item {
        flex-direction: column;
        text-align: center;
    }

    .challenge-icon {
        margin: 0 auto;
    }
}

/* Contact page specific responsive */
@media (max-width: 900px) {
    .contact-page-grid {
        grid-template-columns: 1fr !important;
        gap: 40px !important;
    }
}

/* Tablet portrait adjustments */
@media (min-width: 481px) and (max-width: 768px) {
    .expertises-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

/* Touch device improvements */
@media (hover: none) {
    .expertise-card:hover,
    .service-card:hover,
    .usecase-card:hover,
    .reference-card:hover {
        transform: none;
    }

    .btn:active {
        transform: scale(0.98);
    }
}

/* Ensure images don't overflow */
img {
    max-width: 100%;
    height: auto;
}

/* Better text readability on mobile */
@media (max-width: 768px) {
    body {
        font-size: 15px;
    }

    .expertise-card p,
    .service-card p,
    .usecase-card p,
    .challenge-item p,
    .pillar p {
        font-size: 14px;
        line-height: 1.5;
    }
}