/* Reset et base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg: #ffffff;
    --color-text: #1a1a1a;
    --color-text-light: #4a4a4a;
    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-border: #e5e7eb;
    --color-card-bg: #f9fafb;
    --font-main: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1 {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

h2 {
    font-size: 2rem;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

/* Sections */
section {
    padding: var(--spacing-xl) 0;
}

section:nth-child(even) {
    background-color: var(--color-card-bg);
}

/* Hero */
#hero {
    position: relative;
    min-height: 85vh;
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl) 0;
    overflow: hidden;
}

#hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('images/hero-bg.png');
    background-size: cover;
    background-position: center;
    opacity: 0.2;
    z-index: 0;
}

#hero .container {
    position: relative;
    z-index: 1;
}

#hero .subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

#hero .description {
    font-size: 1.125rem;
    max-width: 700px;
    margin: 0 auto var(--spacing-md) auto;
    color: var(--color-text-light);
}

/* Button */
.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: var(--color-accent);
    color: white;
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    border-radius: 6px;
    transition: background-color 0.2s ease, transform 0.2s ease;
}

.cta-button:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
}

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

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* Cards */
.card {
    padding: var(--spacing-md);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

section:nth-child(even) .card {
    background-color: var(--color-bg);
}

section:nth-child(odd) .card {
    background-color: var(--color-card-bg);
}

/* Technologies */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.tech-category h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.tech-category ul {
    list-style: none;
}

.tech-category li {
    padding: 0.25rem 0;
    color: var(--color-text-light);
}

/* Method */
.method-step {
    text-align: center;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background-color: var(--color-accent);
    color: white;
    font-size: 1.5rem;
    font-weight: 600;
    border-radius: 50%;
    margin-bottom: var(--spacing-sm);
}

/* Contact */
#contact {
    text-align: center;
}

.contact-intro {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.contact-info {
    margin-top: var(--spacing-md);
}

.contact-info p {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
}

.email {
    display: inline-block;
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

.email:hover {
    color: var(--color-accent-hover);
    text-decoration: underline;
}

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

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-info p,
.footer-domains p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 0.25rem;
}

.footer-info strong {
    color: white;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2.25rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    #hero .subtitle {
        font-size: 1.25rem;
    }

    #hero .description {
        font-size: 1rem;
    }

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

    #hero {
        min-height: 70vh;
    }

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

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

    .footer-content {
        flex-direction: column;
    }

    .email {
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.875rem;
    }

    h2 {
        font-size: 1.5rem;
    }

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

    .container {
        padding: 0 var(--spacing-sm);
    }
}