:root {
    --ink: #1c1917;
    --ink-mid: #57534e;
    --paper: #f7f4ef;
    --card: #fffdf9;
    --accent: #1f4d3a;
    --accent-hover: #163829;
    --rule: #e7e0d6;
    --font: "Iowan Old Style", Palatino, "Palatino Linotype", Georgia, serif;
    --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --max-w: 980px;
}

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

body {
    margin: 0;
    font-family: var(--sans);
    color: var(--ink);
    background: var(--paper);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main { flex: 1; }

a { color: var(--accent); }
h1, h2, h3 { font-family: var(--font); line-height: 1.2; font-weight: 600; }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 1.5rem; }

.site-header { background: var(--card); border-bottom: 1px solid var(--rule); }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 1rem 1.5rem; }
.logo { font-family: var(--font); font-size: 1.25rem; color: var(--ink); text-decoration: none; }
.main-nav { display: flex; gap: 1.1rem; align-items: center; }
.main-nav a { text-decoration: none; }

.btn {
    display: inline-block;
    font: 600 0.95rem var(--sans);
    padding: 0.6rem 1.1rem;
    border-radius: 8px;
    border: 1px solid transparent;
    text-decoration: none;
    cursor: pointer;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); color: #fff; }
.btn-secondary { background: var(--card); color: var(--ink); border-color: var(--rule); }
.btn-sm { padding: 0.35rem 0.8rem; font-size: 0.85rem; }
.btn-lg { padding: 0.8rem 1.4rem; }
.btn-full { width: 100%; }

.hero { text-align: center; padding: 4.5rem 1.5rem 2rem; max-width: 680px; margin: 0 auto; }
.hero h1 { font-size: 2.7rem; margin-bottom: 0.8rem; }
.hero-sub { color: var(--ink-mid); font-size: 1.15rem; }
.hero-actions { display: flex; gap: 0.8rem; justify-content: center; flex-wrap: wrap; margin-top: 1.6rem; }

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    padding: 1rem 1.5rem 4rem;
    max-width: var(--max-w);
    margin: 0 auto;
}
.feature h3 { margin-bottom: 0.35rem; }
.feature p { color: var(--ink-mid); margin: 0; }

.auth-wrap { display: flex; justify-content: center; padding: 3.5rem 1.5rem; }
.auth-box {
    width: 100%;
    max-width: 420px;
    background: var(--card);
    border: 1px solid var(--rule);
    border-radius: 14px;
    padding: 2rem;
}
.auth-title { margin: 0 0 0.3rem; }
.auth-sub { color: var(--ink-mid); margin-top: 0; }
.auth-form { display: flex; flex-direction: column; }
.auth-form label { font-size: 0.85rem; font-weight: 600; margin-top: 0.9rem; }
.auth-form input, .auth-form select {
    margin-top: 0.3rem;
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--rule);
    border-radius: 8px;
    font: 1rem var(--sans);
}
.auth-form button { margin-top: 1.3rem; }
.auth-error { background: #fef2f2; color: #991b1b; padding: 0.7rem 0.9rem; border-radius: 8px; }
.auth-switch { text-align: center; margin-top: 1.2rem; }

.prose { max-width: 680px; padding: 2.5rem 0 4rem; }
.prose h1 { font-size: 2rem; }

.site-footer { border-top: 1px solid var(--rule); }
.footer-inner { display: flex; justify-content: space-between; gap: 1rem; padding: 1.2rem 1.5rem; color: var(--ink-mid); font-size: 0.9rem; }
.footer-inner nav { display: flex; gap: 1rem; }
.footer-inner a { color: var(--ink-mid); }