:root {
    --color-primary: #353535;
    --color-accent: #FEF1E8;
    --color-white: #ffffff;
    --color-muted: #6b6b6b;
    --font-family: 'Bicyclette', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-weight: 400;
    color: var(--color-primary);
    background-color: var(--color-white);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--color-white);
    z-index: 100;
}

.logo {
    height: 80px;
    width: auto;
}

.lang-toggle {
    display: flex;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 300;
    letter-spacing: 0.05em;
}

.lang-toggle button {
    background: none;
    border: none;
    font-family: var(--font-family);
    font-size: 0.875rem;
    font-weight: 300;
    color: var(--color-muted);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    transition: color 0.2s ease;
}

.lang-toggle button:hover,
.lang-toggle button.active {
    color: var(--color-primary);
}

.lang-toggle .separator {
    color: var(--color-muted);
}

/* Main content */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 8rem 2rem 4rem;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

/* Hero section */
.hero {
    text-align: center;
    margin-bottom: 4rem;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 300;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

.hero .title {
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-muted);
    margin-bottom: 0.5rem;
}

.hero .credentials {
    font-size: 0.875rem;
    font-weight: 300;
    color: var(--color-muted);
    letter-spacing: 0.05em;
}

/* Specialization section */
.specialization {
    background-color: var(--color-accent);
    padding: 3rem;
    margin-bottom: 4rem;
}

.specialization h2 {
    font-size: 1.125rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    margin-bottom: 1.5rem;
    text-align: center;
}

.specialization ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-width: 400px;
    margin: 0 auto;
}

.specialization li {
    font-size: 0.9375rem;
    font-weight: 300;
    padding-left: 1.5rem;
    position: relative;
}

.specialization li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.5em;
    width: 6px;
    height: 1px;
    background-color: var(--color-primary);
}

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

.contact-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.contact-links a {
    color: var(--color-primary);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 300;
    letter-spacing: 0.025em;
    transition: color 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.contact-links a:hover {
    color: var(--color-muted);
}

.contact-links svg {
    width: 18px;
    height: 18px;
}

/* Footer */
.footer {
    padding: 2rem;
    text-align: center;
    font-size: 0.75rem;
    font-weight: 300;
    color: var(--color-muted);
    letter-spacing: 0.025em;
}

/* Language visibility - hide opposite language */
html[lang="fr"] [data-lang="en"] {
    display: none !important;
}

html[lang="en"] [data-lang="fr"] {
    display: none !important;
}

/* Responsive */
@media (max-width: 600px) {
    .header {
        padding: 1rem 1.5rem;
    }

    .logo {
        height: 60px;
    }

    main {
        padding: 6rem 1.5rem 3rem;
    }

    .hero h1 {
        font-size: 1.75rem;
        letter-spacing: 0.1em;
    }

    .hero .title {
        font-size: 0.875rem;
    }

    .specialization {
        padding: 2rem 1.5rem;
    }

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