:root {
    --bg: #F7FBFA;
    --surface: #FFFFFF;
    --text: #10201E;
    --muted: #52615F;
    --accent: #0D9488;
    --accent-dark: #0F766E;
    --border: #D8E7E4;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #071311;
        --surface: #10201E;
        --text: #EFFDFB;
        --muted: #A8C3BE;
        --accent: #5EEAD4;
        --accent-dark: #2DD4BF;
        --border: #23413D;
    }
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
}

a { color: var(--accent-dark); }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.nav {
    border-bottom: 1px solid var(--border);
    background: var(--surface);
}
.nav-content, .content, .footer-content {
    width: min(820px, calc(100% - 40px));
    margin: 0 auto;
}
.nav-content {
    min-height: 72px;
    display: flex;
    align-items: center;
}
.nav-logo {
    font-weight: 800;
    color: var(--text);
    text-decoration: none;
}
.content { padding: 56px 0; }
.page-title {
    font-size: clamp(2.25rem, 6vw, 4rem);
    line-height: 1;
    letter-spacing: -0.05em;
    margin: 0 0 8px;
}
.page-updated { color: var(--muted); margin: 0 0 36px; }
.highlight-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 22px;
    margin-bottom: 36px;
}
.section { margin: 0 0 32px; }
.section h2 { font-size: 1.35rem; margin: 0 0 10px; }
.section p, .section li { color: var(--muted); }
ul { padding-left: 1.35rem; }
.footer {
    border-top: 1px solid var(--border);
    padding: 28px 0;
}
.footer-content {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}
.footer a {
    color: var(--muted);
    font-weight: 600;
    text-decoration: none;
}

.contact-email {
    font-weight: 700;
    color: var(--accent-dark);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}