:root {
    --bg: #f6f6f4;
    --paper: #ffffff;
    --ink: #0b0b0b;
    --muted: #3a3a3a;
    --line: #d4d4cf;
    --line-strong: #bfbfb8;
    --shadow: 0 10px 24px rgba(0,0,0,.05);
    --radius: 12px;
    --font-sans: "Inter", "Segoe UI", sans-serif;
    --site-shell-max-width: 1440px;
    --site-shell-inline-padding: 1.25rem;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--ink); }
body {
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

.page {
    width: 100%;
    min-height: 100vh;
    background: linear-gradient(180deg, #f7f7f5 0%, #f4f4f2 100%);
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0 20px;
}

.brand {
    font-size: 28px;
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 1;
}

.nav {
    display: flex;
    align-items: center;
    gap: 42px;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: -0.01em;
}

.nav a { color: var(--ink); text-decoration: none; }

.signin {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 84px;
    height: 42px;
    padding: 0 16px;
    border: 1.5px solid #9e9e98;
    border-radius: 8px;
    color: var(--ink);
    text-decoration: none;
    font-weight: 800;
    font-size: 13px;
    background: rgba(255,255,255,.5);
}

.big-btn {
    height: 64px;
    min-width: 210px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 20px;
    font-weight: 900;
    letter-spacing: -0.03em;
}

.btn-primary {
    background: #111111;
    color: #ffffff;
    box-shadow: inset 0 1px 0 rgba(255,255,255,.06);
}

.btn-secondary {
    background: transparent;
    color: #111111;
    border: 1.5px solid #9f9f99;
}

.section {
    padding: 44px 0 34px;
}

.section-title {
    margin: 0;
    text-align: center;
    font-size: clamp(42px, 4vw, 60px);
    line-height: 0.98;
    letter-spacing: -0.05em;
    font-weight: 950;
}

.section-sub {
    margin: 18px auto 0;
    max-width: 920px;
    text-align: center;
    font-size: 22px;
    line-height: 1.42;
    letter-spacing: -0.035em;
    color: var(--muted);
}

.container,
.site-shell {
    width: min(var(--site-shell-max-width), calc(100vw - 46px));
    max-width: var(--site-shell-max-width);
    margin-left: auto;
    margin-right: auto;
}

.max-width {
    margin: 0 calc(calc(min(var(--site-shell-max-width), calc(100vw - 46px)) - 100vw) / 2);
}

.site-footer{
    margin-top: 40px;
    border-top:1px solid var(--line-strong);
    background: #f7f7f5;
}

.footer-inner{
    display:flex;
    flex-wrap: wrap;
    justify-content:space-between;
    gap:40px;
    padding:48px 0 36px;
}

.footer-brand{
    font-size:22px;
    font-weight:900;
    letter-spacing:-0.03em;
    margin-bottom:10px;
}

.footer-desc{
    margin:0;
    font-size:15px;
    color:var(--muted);
    max-width:260px;
}

.footer-links{
    display:flex;
    gap:64px;
}

.footer-links .col{
    display:flex;
    flex-direction:column;
    gap:10px;
}

.footer-links h5{
    margin:0 0 6px;
    font-size:13px;
    letter-spacing:-0.01em;
    text-transform:uppercase;
    color:#555;
}

.footer-links a{
    text-decoration:none;
    color:#111;
    font-size:14px;
    font-weight:600;
}

.footer-bottom{
    border-top:1px solid var(--line);
    padding:16px 0;
    background:#f4f4f2;
}

.footer-bottom-inner{
    display:flex;
    justify-content:space-between;
    align-items:center;
    font-size:13px;
    color:#666;
}

.footer-meta{
    display:flex;
    gap:18px;
}

.footer-meta a{
    color:#444;
    text-decoration:none;
}