/* ============================================================
   Camille Raviart — redesign in the Vercel / Geist idiom
   Monochrome, hairline borders, Geist type, full-bleed + slim nav.
   ============================================================ */

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

:root {
    --unit: 8px;

    --font-sans: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: "Geist Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

    /* Light */
    --bg: #ffffff;
    --text: #0a0a0a;
    --grey: #666666;
    --grey-subtle: #8f8f8f;
    --link: #0a0a0a;
    --border: rgba(0, 0, 0, 0.09);
    --border-strong: rgba(0, 0, 0, 0.18);
    --surface: #fafafa;
    --surface-hover: #f2f2f2;
    --code-bg: #f6f6f6;
    --accent: #0a0a0a;

    --maxw: 720px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0a0a0a;
        --text: #ededed;
        --grey: #a1a1a1;
        --grey-subtle: #6f6f6f;
        --link: #ededed;
        --border: rgba(255, 255, 255, 0.12);
        --border-strong: rgba(255, 255, 255, 0.24);
        --surface: #111111;
        --surface-hover: #1a1a1a;
        --code-bg: #161616;
        --accent: #ededed;
    }
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    background-color: var(--bg);
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg);
    color: var(--text);
    font-size: 1rem;
    line-height: 1.5;
    letter-spacing: -0.011em;
    min-height: 100vh;
    font-feature-settings: "kern", "liga", "cv01", "ss01";
}

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

::selection {
    background: var(--text);
    color: var(--bg);
}

/* ---- Slim top nav ---- */
.topnav {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: calc(var(--unit) * 3);
    padding: calc(var(--unit) * 2.5) calc(var(--unit) * 3);
    border-bottom: 1px solid var(--border);
    background: color-mix(in srgb, var(--bg) 80%, transparent);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
}

.wordmark {
    font-size: 0.9375rem;
    font-weight: 500;
    letter-spacing: -0.02em;
    color: var(--text);
    white-space: nowrap;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: calc(var(--unit) * 3);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    font-weight: 400;
    letter-spacing: -0.01em;
}

.nav-links a {
    color: var(--grey);
    transition: color 0.15s ease;
}

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

/* ---- Shared content shell ---- */
.shell {
    width: 100%;
    max-width: calc(var(--maxw) + var(--unit) * 6);
    margin: 0 auto;
    padding: calc(var(--unit) * 12) calc(var(--unit) * 3) calc(var(--unit) * 16);
}

/* ---- Homepage ---- */
.eyebrow {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    font-weight: 400;
    letter-spacing: 0.02em;
    color: var(--grey);
    margin-bottom: calc(var(--unit) * 2.5);
    text-transform: uppercase;
}

.home h1 {
    font-size: clamp(2.75rem, 7vw, 3.75rem);
    font-weight: 600;
    letter-spacing: -0.045em;
    line-height: 1.02;
    margin-bottom: calc(var(--unit) * 6);
}

.bio {
    max-width: var(--maxw);
}

.bio p {
    color: var(--grey);
    font-size: 1.0625rem;
    line-height: 1.7;
    letter-spacing: -0.011em;
    margin-bottom: calc(var(--unit) * 2.5);
}

.bio p:first-child {
    color: var(--text);
    font-size: 1.3125rem;
    line-height: 1.55;
    letter-spacing: -0.018em;
    margin-bottom: calc(var(--unit) * 4);
}

.bio a {
    color: var(--text);
    text-decoration: none;
    border-bottom: 1px solid var(--border-strong);
    transition: border-color 0.15s ease;
}

.bio a:hover {
    border-color: var(--text);
}

/* ---- Contact / footer ---- */
.contact {
    margin-top: calc(var(--unit) * 8);
    padding-top: calc(var(--unit) * 4);
    border-top: 1px solid var(--border);
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: calc(var(--unit) * 1.5);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--grey);
}

.contact .label {
    color: var(--grey-subtle);
}

.contact a {
    color: var(--text);
    transition: opacity 0.15s ease;
}

.contact a:hover {
    opacity: 0.6;
}

@media (max-width: 640px) {
    .topnav {
        padding: calc(var(--unit) * 2) calc(var(--unit) * 2.5);
        gap: calc(var(--unit) * 2);
    }

    .nav-links {
        gap: calc(var(--unit) * 2);
        font-size: 0.75rem;
    }

    .shell {
        padding: calc(var(--unit) * 8) calc(var(--unit) * 2.5) calc(var(--unit) * 12);
    }

    .bio p:first-child {
        font-size: 1.1875rem;
    }
}