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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #ec4899;
    --accent: #14b8a6;
    --dark: #0f172a;
    --gray: #64748b;
    --light: #f8fafc;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, #6366f1 0%, #ec4899 100%);
    --gradient-2: linear-gradient(135deg, #14b8a6 0%, #6366f1 100%);
    --gradient-3: linear-gradient(135deg, #ec4899 0%, #f97316 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.3);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
    background: var(--white);
}

/* ========== HEADER ========== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

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

nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--gradient);
    transition: width 0.3s;
    border-radius: 2px;
}

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

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

/* ========== HERO SECTION ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8rem 2rem 4rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(5deg); }
}

.hero-content {
    max-width: 1400px;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    z-index: 10;
    position: relative;
}

.hero-text h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    color: var(--white);
    margin-bottom: 1.5rem;
    line-height: 1.1;
    letter-spacing: -1px;
}

.hero-text h1 span {
    background: linear-gradient(90deg, #fbbf24, #f59e0b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text p {
    font-size: 1.3rem;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    gap: 3rem;
    margin-bottom: 2.5rem;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--accent);
    display: block;
}

.stat-label {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

.hero-visual {
    position: relative;
}

.hero-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 3rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-xl);
}

.hero-card h3 {
    color: var(--white);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.hero-card ul {
    list-style: none;
}

.hero-card li {
    color: rgba(255, 255, 255, 0.95);
    padding: 0.8rem 0;
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.05rem;
}

.hero-card li::before {
    content: '✓';
    background: var(--accent);
    color: var(--dark);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
}

/* ========== BUTTONS ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.05rem;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.btn:hover::before {
    opacity: 1;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #ea580c);
    color: var(--white);
    box-shadow: 0 4px 20px rgba(245, 158, 11, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(245, 158, 11, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-3px);
}

.btn-dark {
    background: var(--dark);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-dark:hover {
    background: #1e293b;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.cta-buttons {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

/* ========== SECTIONS ========== */
.section {
    padding: 6rem 2rem;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-kicker {
    color: var(--primary);
    font-weight: 700;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    color: var(--dark);
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.section-description {
    font-size: 1.2rem;
    color: var(--gray);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

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

.card {
    background: var(--white);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
    border: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient);
    transform: scaleX(0);
    transition: transform 0.4s;
}

.card:hover::before {
    transform: scaleX(1);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: block;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 1rem;
}

.card-text {
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

/* ========== PROJECT CARD ========== */
.project-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.project-image {
    width: 100%;
    height: 250px;
    background: var(--gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 4rem;
    position: relative;
    overflow: hidden;
}

.project-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent, rgba(0,0,0,0.3));
}

.project-content {
    padding: 2rem;
}

.project-tag {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: var(--light);
    color: var(--primary);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.project-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.8rem;
}

.project-description {
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.project-tech {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.tech-badge {
    padding: 0.4rem 0.9rem;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* ========== PRICING ========== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.pricing-card {
    background: var(--white);
    border-radius: 24px;
    padding: 3rem;
    box-shadow: var(--shadow-md);
    border: 2px solid transparent;
    transition: all 0.3s;
    position: relative;
}

.pricing-card.featured {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: scale(1.05);
}

.pricing-card.featured::before {
    content: 'POPULAIRE';
    position: absolute;
    top: -12px;
    right: 30px;
    background: var(--gradient);
    color: var(--white);
    padding: 0.4rem 1.2rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.pricing-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.pricing-header h3 {
    font-size: 1.8rem;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.pricing-price {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--primary);
    margin: 1.5rem 0;
}

.pricing-price span {
    font-size: 1.2rem;
    color: var(--gray);
    font-weight: 500;
}

.pricing-features {
    list-style: none;
    margin: 2rem 0;
}

.pricing-features li {
    padding: 0.8rem 0;
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--gray);
}

.pricing-features li::before {
    content: '✓';
    color: var(--primary);
    font-weight: bold;
    font-size: 1.2rem;
}

/* ========== CONTACT FORM ========== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info {
    background: var(--gradient);
    color: var(--white);
    padding: 3rem;
    border-radius: 24px;
    height: 100%;
}

.contact-info h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin: 2rem 0;
}

.contact-icon {
    font-size: 2rem;
}

.contact-form {
    background: var(--white);
    padding: 3rem;
    border-radius: 24px;
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--light);
    border-radius: 12px;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s;
    background: var(--white);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

/* ========== FOOTER ========== */
footer {
    background: var(--dark);
    color: var(--white);
    padding: 4rem 2rem 2rem;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

.footer-logo {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s;
}

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

/* ========== ANIMATIONS ========== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ========== RESPONSIVE ========== */

/* Tablettes et petits ordinateurs (jusqu'à 968px) */
@media (max-width: 968px) {
    nav {
        padding: 1rem 1.5rem;
    }

    .logo img {
        height: 80px !important;
    }

    .hero {
        padding: 6rem 1.5rem 3rem;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

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

    .hero-text h1 {
        font-size: clamp(2rem, 8vw, 3rem);
    }

    .hero-text p {
        font-size: 1.1rem;
    }

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

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

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

    .nav-links {
        gap: 1.5rem;
        font-size: 0.9rem;
    }

    .section {
        padding: 4rem 1.5rem;
    }

    .section-title {
        font-size: clamp(1.8rem, 6vw, 2.5rem);
    }

    .section-description {
        font-size: 1.1rem;
    }

    .cards-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

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

    .pricing-card.featured {
        transform: scale(1);
    }

    .card {
        padding: 2rem;
    }

    .hero-card {
        padding: 2rem;
    }

    .contact-form {
        padding: 2rem;
    }

    .contact-info {
        padding: 2rem;
    }
}

/* ========== CONTACT HEADER ANIMATION ========== */
.contact-header-animation {
    position: relative;
    z-index: 1;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    padding: 4rem 2rem;
    border-radius: 24px;
    margin-bottom: 3rem;
    border: 2px solid rgba(102, 126, 234, 0.1);
    overflow: hidden;
}

.animate-fade-in {
    animation: fadeInHeader 1s ease-out;
    position: relative;
    z-index: 2;
}

.animate-slide-up {
    animation: slideUpHeader 1.2s ease-out;
    position: relative;
    z-index: 2;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.animate-fade-in-delay {
    animation: fadeInHeader 1.5s ease-out;
    position: relative;
    z-index: 2;
}

@keyframes fadeInHeader {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUpHeader {
    from {
        opacity: 0;
        transform: translateY(50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes bounceIn {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    50% {
        transform: scale(1.2);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Smartphones (jusqu'à 600px) */
@media (max-width: 600px) {
    nav {
        padding: 0.8rem 1rem;
    }

    .logo {
        font-size: 1.4rem;
    }

    .logo img {
        height: 60px !important;
        max-height: 60px !important;
    }

    .nav-links {
        gap: 1rem;
        font-size: 0.85rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero {
        padding: 5rem 1rem 2rem;
        min-height: auto;
    }

    .hero-text h1 {
        font-size: 2rem;
        margin-bottom: 1rem;
    }

    .hero-text p {
        font-size: 1rem;
        margin-bottom: 2rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }

    .stat-number {
        font-size: 2rem;
    }

    .stat-label {
        font-size: 0.9rem;
    }

    .cta-buttons {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
    }

    .btn {
        width: 100%;
        justify-content: center;
        padding: 0.9rem 1.5rem;
        font-size: 1rem;
    }

    .hero-card {
        padding: 1.5rem;
    }

    .hero-card h3 {
        font-size: 1.4rem;
    }

    .hero-card li {
        font-size: 0.95rem;
        padding: 0.6rem 0;
    }

    .section {
        padding: 3rem 1rem;
    }

    .section-title {
        font-size: 1.8rem;
        margin-bottom: 1rem;
    }

    .section-description {
        font-size: 1rem;
    }

    .section-header {
        margin-bottom: 2.5rem;
    }

    .cards-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .card {
        padding: 1.5rem;
    }

    .card-icon {
        font-size: 2.5rem;
        margin-bottom: 1rem;
    }

    .card-title {
        font-size: 1.3rem;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .pricing-card {
        padding: 2rem;
    }

    .pricing-card.featured {
        transform: scale(1);
    }

    .pricing-price {
        font-size: 2.5rem;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .contact-form {
        padding: 1.5rem;
    }

    .contact-info {
        padding: 1.5rem;
    }

    .contact-info h3 {
        font-size: 1.5rem;
    }

    .contact-item {
        margin: 1.5rem 0;
    }

    .form-group input,
    .form-group textarea,
    .form-group select {
        padding: 0.9rem;
        font-size: 0.95rem;
    }

    .project-card {
        margin-bottom: 1.5rem;
    }

    .project-image {
        height: 200px;
        font-size: 3rem;
    }

    .project-content {
        padding: 1.5rem;
    }

    .project-title {
        font-size: 1.3rem;
    }

    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }

    .contact-header-animation {
        padding: 2rem 1rem;
        margin-bottom: 2rem;
    }
}

/* Très petits smartphones (jusqu'à 375px) */
@media (max-width: 375px) {
    .hero-text h1 {
        font-size: 1.8rem;
    }

    .hero-text p {
        font-size: 0.95rem;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .btn {
        padding: 0.8rem 1.2rem;
        font-size: 0.95rem;
    }

    .card {
        padding: 1.2rem;
    }

    .pricing-card {
        padding: 1.5rem;
    }

    .contact-form,
    .contact-info {
        padding: 1.2rem;
    }
}