/* ========================================
   CSS VARIABLES & RESET
======================================== */
:root {
    /* Colors */
    --color-black: #0a0a0a;
    --color-dark: #121212;
    --color-gray-900: #1a1a1a;
    --color-gray-800: #2a2a2a;
    --color-gray-700: #3a3a3a;
    --color-gray-600: #4a4a4a;
    --color-gray-500: #6a6a6a;
    --color-gray-400: #8a8a8a;
    --color-gray-300: #aaaaaa;
    --color-gray-200: #cccccc;
    --color-gray-100: #e8e8e8;
    --color-white: #ffffff;
    
    /* Accent */
    --color-accent: #ffffff;
    --color-accent-dim: rgba(255, 255, 255, 0.1);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-size-6xl: 4.5rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    --spacing-5xl: 8rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-white);
    background-color: var(--color-black);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ========================================
   LAYOUT
======================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-4xl);
}

.section-tag {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--color-gray-300);
    line-height: 1.7;
}

/* ========================================
   BUTTONS
======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--color-gray-200);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-white);
    border: 1px solid var(--color-gray-600);
}

.btn-secondary:hover {
    border-color: var(--color-white);
    background: var(--color-accent-dim);
}

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

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

.btn-large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-base);
}

.btn-full {
    width: 100%;
}

/* ========================================
   NAVIGATION
======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-gray-800);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    line-height: 1;
    height: 100%;
    padding: 5px 0;
}

.logo-img {
    height: 70px;
    width: auto;
    object-fit: contain;
    transition: opacity var(--transition-fast);
}

.logo-img:hover {
    opacity: 0.8;
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 800;
    letter-spacing: 0.1em;
}

.logo-sub {
    font-size: var(--font-size-xs);
    font-weight: 400;
    letter-spacing: 0.2em;
    color: var(--color-gray-400);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-2xl);
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-300);
    transition: color var(--transition-fast);
}

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

.nav-link.cta-nav {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-white);
    color: var(--color-black);
    border-radius: var(--radius-md);
}

.nav-link.cta-nav:hover {
    background: var(--color-gray-200);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    transition: all var(--transition-base);
}

/* ========================================
   HERO SECTION
======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-5xl) 0;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 80%, rgba(40, 40, 40, 0.4) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(60, 60, 60, 0.3) 0%, transparent 50%),
        linear-gradient(180deg, var(--color-black) 0%, var(--color-dark) 100%);
}

.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 900px;
    padding: 0 var(--spacing-lg);
}

.hero-tag {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid var(--color-gray-700);
    border-radius: var(--radius-full);
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-xl);
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-gray-400) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: var(--font-size-xl);
    color: var(--color-gray-300);
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl);
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-scroll {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-gray-500);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.2em;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-gray-500), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(1); }
    50% { opacity: 1; transform: scaleY(1.2); }
}

/* ========================================
   STATS BANNER
======================================== */
.stats-banner {
    background: var(--color-gray-900);
    padding: var(--spacing-3xl) 0;
    border-top: 1px solid var(--color-gray-800);
    border-bottom: 1px solid var(--color-gray-800);
}

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

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

.stat-number {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    display: inline;
}

.stat-suffix {
    font-size: var(--font-size-2xl);
    font-weight: 700;
}

.stat-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
    margin-top: var(--spacing-sm);
}

/* ========================================
   SERVICES SECTION
======================================== */
.services {
    padding: var(--spacing-5xl) 0;
    background: var(--color-black);
}

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

.service-card {
    background: var(--color-gray-900);
    border: 1px solid var(--color-gray-800);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    transition: all var(--transition-base);
}

.service-card:hover {
    border-color: var(--color-gray-600);
    transform: translateY(-4px);
}

.service-card-wide {
    grid-column: span 3;
}

.service-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gray-800);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.service-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-white);
}

.service-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.service-description {
    font-size: var(--font-size-base);
    color: var(--color-gray-400);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.service-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.service-features li {
    font-size: var(--font-size-sm);
    color: var(--color-gray-300);
    padding-left: var(--spacing-lg);
    position: relative;
}

.service-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--color-white);
    border-radius: 50%;
}

.services-cta {
    text-align: center;
    margin-top: var(--spacing-3xl);
}

/* ========================================
   ABOUT SECTION
======================================== */
.about {
    padding: var(--spacing-5xl) 0;
    background: var(--color-gray-900);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.about-content .section-tag,
.about-content .section-title {
    text-align: left;
}

.about-text {
    font-size: var(--font-size-lg);
    color: var(--color-gray-300);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.about-feature {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.feature-icon {
    width: 24px;
    height: 24px;
    background: var(--color-white);
    color: var(--color-black);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: 700;
    flex-shrink: 0;
}

.feature-text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.feature-text strong {
    font-size: var(--font-size-base);
    font-weight: 600;
}

.feature-text span {
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
}

.about-visual {
    position: relative;
    height: 500px;
}

.visual-box {
    position: relative;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-gray-800) 0%, var(--color-gray-900) 100%);
    border-radius: var(--radius-xl);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-logo {
    max-width: 70%;
    max-height: 70%;
    object-fit: contain;
    opacity: 0.9;
    transition: all var(--transition-base);
}

.about-logo:hover {
    opacity: 1;
    transform: scale(1.05);
}

.visual-pattern {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(90deg, var(--color-gray-700) 1px, transparent 1px),
        linear-gradient(var(--color-gray-700) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.3;
}

.visual-accent {
    position: absolute;
    bottom: -50px;
    right: -50px;
    width: 200px;
    height: 200px;
    background: var(--color-white);
    border-radius: 50%;
    opacity: 0.05;
}

/* ========================================
   METHODOLOGY SECTION
======================================== */
.methodology {
    padding: var(--spacing-5xl) 0;
    background: var(--color-black);
}

.methodology-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.methodology-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--color-gray-700);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
    position: relative;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
    text-align: right;
}

.timeline-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: var(--color-gray-900);
    border: 2px solid var(--color-gray-700);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.timeline-content {
    flex: 1;
    background: var(--color-gray-900);
    border: 1px solid var(--color-gray-800);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.timeline-content h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.timeline-content p {
    color: var(--color-gray-400);
    line-height: 1.7;
}

/* ========================================
   TESTIMONIALS SECTION
======================================== */
.testimonials {
    padding: var(--spacing-5xl) 0;
    background: var(--color-gray-900);
}

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

.testimonial-card {
    background: var(--color-black);
    border: 1px solid var(--color-gray-800);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
}

.testimonial-content {
    margin-bottom: var(--spacing-xl);
}

.testimonial-content p {
    font-size: var(--font-size-lg);
    font-style: italic;
    color: var(--color-gray-200);
    line-height: 1.8;
}

.testimonial-content p::before {
    content: '"';
    font-size: var(--font-size-4xl);
    color: var(--color-gray-600);
    line-height: 0;
    vertical-align: -0.4em;
    margin-right: var(--spacing-xs);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-info strong {
    font-size: var(--font-size-base);
    font-weight: 600;
}

.author-info span {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/* ========================================
   CTA SECTION
======================================== */
.cta-section {
    padding: var(--spacing-5xl) 0;
    background: linear-gradient(135deg, var(--color-gray-800) 0%, var(--color-gray-900) 100%);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255,255,255,0.03) 0%, transparent 70%);
    border-radius: 50%;
}

.cta-content {
    position: relative;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.cta-content p {
    font-size: var(--font-size-lg);
    color: var(--color-gray-300);
    margin-bottom: var(--spacing-2xl);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   CONTACT SECTION
======================================== */
.contact {
    padding: var(--spacing-5xl) 0;
    background: var(--color-black);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
}

.contact-info .section-tag,
.contact-info .section-title {
    text-align: left;
}

.contact-text {
    font-size: var(--font-size-lg);
    color: var(--color-gray-300);
    margin-bottom: var(--spacing-2xl);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.contact-item svg {
    width: 24px;
    height: 24px;
    color: var(--color-white);
    flex-shrink: 0;
    margin-top: 4px;
}

.contact-item div {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.contact-item strong {
    font-size: var(--font-size-base);
    font-weight: 600;
}

.contact-item span {
    font-size: var(--font-size-base);
    color: var(--color-gray-400);
}

.contact-form-wrapper {
    background: var(--color-gray-900);
    border: 1px solid var(--color-gray-800);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-300);
}

.form-group input,
.form-group select,
.form-group textarea {
    background: var(--color-gray-800);
    border: 1px solid var(--color-gray-700);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    color: var(--color-white);
    font-family: inherit;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-white);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-gray-500);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-note {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    text-align: center;
    margin-top: var(--spacing-sm);
}

/* ========================================
   FOOTER
======================================== */
.footer {
    background: var(--color-gray-900);
    padding: var(--spacing-4xl) 0 var(--spacing-xl);
    border-top: 1px solid var(--color-gray-800);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-3xl);
}

.footer-brand {
    display: flex;
    flex-direction: column;
}

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

.footer-brand .logo-img {
    height: 140px;
    width: auto;
}

.footer-brand p {
    color: var(--color-gray-400);
    margin-top: var(--spacing-md);
    max-width: 280px;
}

.footer-links h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-lg);
    color: var(--color-white);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-white);
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-gray-800);
    text-align: center;
}

.footer-bottom p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/* ========================================
   ANIMATIONS
======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

[data-aos="fade-up"] {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

[data-aos="fade-up"].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

[data-aos="fade-right"] {
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.6s ease-out;
}

[data-aos="fade-right"].aos-animate {
    opacity: 1;
    transform: translateX(0);
}

[data-aos="fade-left"] {
    opacity: 0;
    transform: translateX(30px);
    transition: all 0.6s ease-out;
}

[data-aos="fade-left"].aos-animate {
    opacity: 1;
    transform: translateX(0);
}

/* ========================================
   RESPONSIVE DESIGN
======================================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: var(--font-size-5xl);
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .service-card-wide {
        grid-column: span 2;
        grid-template-columns: 1fr;
    }
    
    .service-card-wide .service-features {
        grid-template-columns: 1fr;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .about-visual {
        height: 350px;
        order: -1;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .nav-container {
        height: 70px;
    }
    
    .logo-img {
        height: 60px;
    }
    
    .footer-brand .logo-img {
        height: 120px;
    }
    
    /* ...existing code... */
}

@media (max-width: 768px) {
    :root {
        --font-size-6xl: 3rem;
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 400px;
        height: 100vh;
        background: var(--color-gray-900);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--spacing-xl);
        transition: right var(--transition-base);
        border-left: 1px solid var(--color-gray-800);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .hamburger {
        display: flex;
        z-index: 1001;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-cta .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-xl);
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .service-card-wide {
        grid-column: span 1;
    }
    
    .methodology-timeline::before {
        left: 30px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(even) {
        flex-direction: row;
        text-align: left;
    }
    
    .timeline-number {
        width: 50px;
        height: 50px;
        font-size: var(--font-size-base);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
        text-align: center;
    }
    
    .footer-brand {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .footer-brand p {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero {
        padding: var(--spacing-4xl) 0;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-item {
        padding: var(--spacing-md) 0;
        border-bottom: 1px solid var(--color-gray-800);
    }
    
    .stat-item:last-child {
        border-bottom: none;
    }
    
    .logo-img {
        height: 70px;
    }
    
    .footer-brand .logo-img {
        height: 90px;
    }
}

/* ========================================
   UTILITY CLASSES
======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-xl); }
.mt-3 { margin-top: var(--spacing-2xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-xl); }
.mb-3 { margin-bottom: var(--spacing-2xl); }

.hidden { display: none; }
.visible { display: block; }

/* Overlay pour menu mobile */
.nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 999;
}

.nav-overlay.active {
    opacity: 1;
    visibility: visible;
}