:root {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: #1f2933;
    background: #f5f7fa;
    line-height: 1.45;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: #f5f7fa;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: #17365d;
    color: white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.site-title {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.8rem 1rem 0.35rem;
    font-size: 1.1rem;
    font-weight: 700;
}

.main-nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 0.65rem 0.65rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
}

.main-nav a {
    color: white;
    text-decoration: none;
    padding: 0.45rem 0.65rem;
    border-radius: 0.35rem;
    font-size: 0.92rem;
}

.main-nav a:hover,
.main-nav a:focus-visible,
.main-nav a.active {
    background: rgba(255, 255, 255, 0.18);
}

.page-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.25rem 1rem 2rem;
    background: white;
    min-height: calc(100vh - 145px);
}

.site-footer {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.8rem 1rem 1.4rem;
    text-align: center;
    color: #637381;
    font-size: 0.82rem;
}

h1, h2, h3 { color: #17365d; }

.blue { color: blue; font-weight: bold; }
.green { color: green; font-weight: bold; }
.orange { color: darkorange; font-weight: bold; }
.red { color: red; font-weight: bold; }
.black { color: black; font-weight: bold; }
.white { color: white; }

table {
    border-collapse: collapse;
    margin: 0.5rem auto;
    max-width: 100%;
}

p, table, th, td {
    font-family: inherit;
    font-size: 0.95rem;
}

th, td { padding: 0.35rem 0.5rem; }
th { background-color: #faebd7; }
td.boldcell { font-weight: bold; }

a { color: #8b1e1e; }
a:hover, a:focus-visible { color: #c62828; }

p.warn {
    text-align: center;
    color: red;
    font-weight: bold;
}

input, select, textarea, button {
    font: inherit;
}

input[type="submit"], button {
    cursor: pointer;
    padding: 0.4rem 0.7rem;
}

textarea { max-width: 100%; }

@media (max-width: 700px) {
    .page-content { padding: 0.8rem 0.5rem 1.5rem; overflow-x: auto; }
    .main-nav { gap: 0.15rem; }
    .main-nav a { padding: 0.4rem 0.5rem; font-size: 0.86rem; }
}