/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=Playfair+Display:wght@400;700&display=swap');

:root {
    /* Color Palette */
    --color-primary: #0f172a;
    /* Deep Navy */
    --color-primary-light: #1e293b;
    --color-accent: #3b82f6;
    /* Vibrant Blue */
    --color-accent-hover: #2563eb;
    --color-gold: #fbbf24;
    /* Subtle Gold for premium feel */
    --color-text-main: #334155;
    --color-text-light: #64748b;
    --color-white: #ffffff;
    --color-bg-light: #f8fafc;
    --color-bg-dark: #020617;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Outfit', sans-serif;
    color: var(--color-text-main);
    background-color: var(--color-bg-page, var(--color-bg-light));
    line-height: 1.6;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: 'Outfit', sans-serif;
    /* Clean modern headings */
    color: var(--color-primary);
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1.display-title {
    font-family: 'Playfair Display', serif;
    /* Sophisticated serif for main titles */
    font-size: 3.5rem;
    font-weight: 700;
}

.hero-main-title {
    font-family: 'Outfit', sans-serif;
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.15;
}

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

ul {
    list-style: none;
}

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

/* Utilities */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.text-primary {
    color: var(--color-primary);
}

.text-accent {
    color: var(--color-accent);
}

.text-gold {
    color: var(--color-gold);
}

.section {
    padding: var(--spacing-xl) 0;
}

.grid {
    display: grid;
    gap: var(--spacing-md);
}

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

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 768px) {

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    h1.display-title,
    .hero-main-title {
        font-size: 2.5rem;
    }

    .section {
        padding: 3rem 0;
    }
}

/* Components */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 4px;
    /* Slightly boxy for engineering feel */
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all var(--transition-medium);
    border: none;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    border: 1px solid var(--color-primary);
}

.btn-primary:hover {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn-outline:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

/* Navigation - Simple Top Bar */
.navbar {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    transform: translateY(0);
    transition: background-color 0.25s ease, box-shadow 0.25s ease, transform 0.3s ease;
}

body.home-page .navbar {
    background-color: transparent;
    backdrop-filter: none;
    box-shadow: none;
}

body.home-page .navbar:not(.at-top) {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.navbar.nav-hidden {
    transform: translateY(-100%);
}

body.home-page .navbar.at-top .logo-text {
    color: var(--color-white);
}

body.home-page .navbar.at-top .nav-links a {
    color: rgba(255, 255, 255, 0.92);
}

body.home-page .navbar.at-top .nav-links a:hover,
body.home-page .navbar.at-top .nav-links a.active {
    color: var(--color-accent);
}

body.home-page .navbar.at-top .menu-toggle span {
    background-color: var(--color-white);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-img {
    height: 60px;
    width: auto;
}

.logo-text {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1.1;
    max-width: 200px;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-links a {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--color-primary-light);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-accent);
}

/* Hamburger Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: var(--color-primary);
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* Responsive Navigation */
@media (max-width: 992px) {
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 80px;
        right: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: white;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2rem;
        transition: right 0.4s cubic-bezier(0.77, 0, 0.175, 1);
        z-index: 1000;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    }

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

    .nav-links a {
        font-size: 1.2rem;
    }
}

/* Card Style */
.card {
    background: var(--color-white);
    border-radius: 8px;
    padding: var(--spacing-md);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.02);
    transition: var(--transition-medium);
    border: 1px solid #f1f5f9;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border-color: var(--color-accent);
}

/* Home: Who We Are Featured Section */
.who-we-are-section {
    background: #f1f2f4;
    position: relative;
    overflow: hidden;
}

.who-we-are-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 230px;
    height: 230px;
    background:
        linear-gradient(135deg, transparent 51%, #ecd7a2 51%) top right/100% 50% no-repeat,
        linear-gradient(225deg, transparent 51%, #ecd7a2 51%) bottom right/100% 50% no-repeat;
    opacity: 0.95;
}

.who-we-are-inner {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: clamp(2rem, 4vw, 5rem);
    position: relative;
    z-index: 1;
}

.who-we-are-main {
    max-width: 900px;
}

.who-we-are-label {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    letter-spacing: 0.2em;
    font-size: 0.95rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 1.8rem;
}

.who-we-are-label::before {
    content: '';
    width: 3.8rem;
    height: 2px;
    background-color: #1f2937;
}

.who-we-are-title {
    font-family: 'Outfit', sans-serif;
    font-size: clamp(2.2rem, 5vw, 4.2rem);
    line-height: 1.1;
    margin-bottom: 2.2rem;
    color: #020617;
    max-width: 900px;
}

.who-we-are-copy p {
    font-size: 1.1rem;
    line-height: 1.7;
    color: #1f2937;
    margin-bottom: 1.6rem;
    max-width: 980px;
}

.who-we-are-btn {
    display: inline-block;
    margin-top: 1rem;
    border: 2px solid #0f6d43;
    color: #0f6d43;
    padding: 1rem 2.4rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-weight: 700;
    font-size: 0.95rem;
    border-radius: 2px;
    transition: background-color 0.25s ease, color 0.25s ease;
}

.who-we-are-btn:hover {
    background-color: #0f6d43;
    color: var(--color-white);
}

.who-we-are-stats {
    padding-top: 9.5rem;
}

.who-stat {
    margin-bottom: 2.2rem;
}

.who-stat-value {
    font-size: clamp(2rem, 3vw, 3rem);
    line-height: 1;
    font-weight: 800;
    color: #0f6d43;
    margin-bottom: 0.6rem;
}

.who-stat p {
    font-size: clamp(1.1rem, 1.8vw, 1.9rem);
    font-weight: 700;
    line-height: 1.25;
    color: #020617;
}

@media (max-width: 992px) {
    .who-we-are-inner {
        grid-template-columns: 1fr;
    }

    .who-we-are-stats {
        padding-top: 0;
    }

    .who-stat {
        margin-bottom: 1.6rem;
    }
}

@media (max-width: 768px) {
    .who-we-are-section::before {
        width: 140px;
        height: 140px;
    }

    .who-we-are-copy p {
        font-size: 1rem;
    }

    .who-we-are-btn {
        width: 100%;
        text-align: center;
    }
}

/* Home: Missions & Valeurs */
.missions-section {
    background-color: #f4f6f8;
    background-image: linear-gradient(rgba(15, 23, 42, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(15, 23, 42, 0.04) 1px, transparent 1px);
    background-size: 36px 36px;
    border-top: 1px solid #dbe2ea;
    border-bottom: 1px solid #dbe2ea;
}

.missions-header {
    margin-bottom: 4rem;
}

.missions-pretitle {
    display: inline-flex;
    align-items: center;
    gap: 0.9rem;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    color: #334155;
    margin-bottom: 1rem;
}

.missions-pretitle::before,
.missions-pretitle::after {
    content: '';
    width: 2.1rem;
    height: 1px;
    background-color: #94a3b8;
}

.missions-title {
    margin-bottom: 1rem;
}

.missions-subtitle {
    max-width: 740px;
    margin: 0 auto;
    color: #475569;
    font-size: 1.12rem;
}

.missions-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.2rem;
}

.mission-card {
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid #d8e0ea;
    border-top: 4px solid #8fb3e8;
    border-radius: 8px;
    padding: 1.25rem 1.2rem 1.3rem;
    min-height: 325px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 8px 28px rgba(15, 23, 42, 0.04);
    transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease, border-top-color 0.28s ease;
}

.mission-card-featured {
    border-top-color: #2563eb;
    box-shadow: 0 14px 32px rgba(37, 99, 235, 0.14);
}

.mission-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 18px 34px rgba(15, 23, 42, 0.12);
    border-color: #bfd0e3;
    border-top-color: #2563eb;
}

.mission-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.05rem;
}

.mission-index {
    font-size: 0.92rem;
    letter-spacing: 0.14em;
    font-weight: 800;
    color: #7c8ea3;
}

.mission-icon {
    width: 26px;
    height: 26px;
    stroke: #1e3a8a;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
    fill: none;
    transition: transform 0.25s ease, stroke 0.25s ease;
}

.mission-card:hover .mission-icon {
    transform: translateY(-2px);
    stroke: #2563eb;
}

.mission-card h3 {
    font-size: 1.32rem;
    margin-bottom: 0.75rem;
    letter-spacing: -0.01em;
}

.mission-card p {
    color: #334155;
    line-height: 1.62;
    font-size: 1rem;
    margin-bottom: 1rem;
}

.mission-proof {
    margin-top: auto;
    align-self: flex-start;
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #0f172a;
    background-color: #e8edf3;
    border: 1px solid #cad5e2;
    border-radius: 999px;
    padding: 0.38rem 0.72rem;
}

@media (max-width: 992px) {
    .missions-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    .missions-header {
        margin-bottom: 2.25rem;
    }

    .missions-grid {
        display: grid;
        grid-auto-flow: column;
        grid-auto-columns: minmax(84%, 1fr);
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        padding-bottom: 0.4rem;
        scrollbar-width: thin;
    }

    .mission-card {
        scroll-snap-align: start;
        min-height: 300px;
    }

    .missions-subtitle {
        font-size: 1rem;
    }
}

/* Footer */
footer {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

footer a {
    color: #94a3b8;
}

footer a:hover {
    color: white;
}

/* Global Creative & Professional Transitions */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-primary);
    z-index: 9999;
    transform: translateX(0);
    transition: transform 0.4s cubic-bezier(0.77, 0, 0.175, 1);
    pointer-events: none;
}

body.page-loaded::after {
    transform: translateX(100%);
}

body {
    opacity: 0;
    transition: opacity 0.3s ease 0.2s;
}

body.page-loaded {
    opacity: 1;
}

/* Dynamic Scroll Animations (Intersection Observer) */
.reveal {
    opacity: 0;
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: transform, opacity;
}

.reveal-up {
    transform: translateY(40px);
}

.reveal-zoom {
    transform: scale(0.9);
}

.reveal-slide-left {
    transform: translateX(-60px) skewX(2deg);
}

.reveal-slide-right {
    transform: translateX(60px) skewX(-2deg);
}

.reveal.active {
    opacity: 1;
    transform: translate(0, 0) scale(1) skew(0);
}

/* Page Specific Themes (CSS Variable Overrides) */
body.page-accueil {
    --color-primary: #0f172a;
    --color-accent: #3b82f6;
    --color-bg-page: #f8fafc;
}

body.page-ingenierie {
    --color-primary: #1e293b;
    --color-accent: #0284c7;
    --color-bg-light: #f1f5f9;
    --color-bg-page: #ffffff;
}

body.page-digital {
    --color-primary: #0f172a;
    --color-accent: #06b6d4;
    --color-bg-light: #fafafa;
    --color-bg-page: #ffffff;
}

body.page-moyen-humain {
    --color-primary: #1e1b4b;
    --color-accent: #6366f1;
    --color-bg-page: #f8fafc;
}

body.page-partenaires {
    --color-primary: #334155;
    --color-accent: #475569;
    --color-bg-page: #ffffff;
}

body.page-contact {
    --color-primary: #0f172a;
    --color-accent: #2563eb;
    --color-bg-page: #ffffff;
}

/* Floating WhatsApp Button */
.whatsapp-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 60px;
    height: 60px;
    background-color: #25D366;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
    z-index: 2000;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.whatsapp-btn:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 8px 25px rgba(37, 211, 102, 0.4);
}

.whatsapp-btn svg {
    width: 32px;
    height: 32px;
    fill: currentColor;
}

@media (max-width: 768px) {
    .whatsapp-btn {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 50px;
        height: 50px;
    }
}

/* Staggered Entrance Animations */
.stagger-1,
.stagger-2,
.stagger-3,
.stagger-4,
.stagger-5 {
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.5s cubic-bezier(0.2, 0.8, 0.2, 1),
        transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}

body.page-loaded .stagger-1 {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.3s;
}

body.page-loaded .stagger-2 {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.4s;
}

body.page-loaded .stagger-3 {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.5s;
}

body.page-loaded .stagger-4 {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.6s;
}

body.page-loaded .stagger-5 {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.7s;
}

/* Link Hover Animation */
.nav-links a {
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width 0.3s ease;
}

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

/* Global Animated Background - Sliding Diagonals */
.bg-grid-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -10;
    overflow: hidden;
    background-color: var(--color-bg-light);
    pointer-events: none;
}

.bg-grid-layer {
    animation: bg-slide 20s ease-in-out infinite alternate;
    background-image: linear-gradient(-60deg, var(--color-primary) 50%, var(--color-accent) 50%);
    bottom: 0;
    left: -50%;
    opacity: 0.05;
    position: absolute;
    right: -50%;
    top: 0;
}

.bg-grid-2 {
    animation-direction: alternate-reverse;
    animation-duration: 25s;
    background-image: linear-gradient(-60deg, var(--color-white) 50%, #e2e8f0 50%);
    /* White and Pale Grey */
    opacity: 0.08;
}

.bg-grid-3 {
    animation-duration: 30s;
    background-image: linear-gradient(-60deg, var(--color-accent) 50%, #f1f5f9 50%);
    /* Blue and very pale grey */
    opacity: 0.04;
}

@keyframes bg-slide {
    0% {
        transform: translateX(-15%);
    }

    100% {
        transform: translateX(15%);
    }
}