:root {
    --bg: #f5f7fb;
    --card: #ffffff;
    --ink: #172033;
    --muted: #5d6678;
    --line: #d9dee8;
    --navy: #1f3a5f;
    --gold: #d6a72e;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--ink);
}
.shell { max-width: 1250px; margin: 0 auto; padding: 28px; }
header {
    background: linear-gradient(135deg, var(--navy), #102238);
    color: white;
    padding: 26px;
    border-radius: 18px;
    margin-bottom: 20px;
    box-shadow: 0 12px 28px rgba(31, 58, 95, .18);
}
h1 { margin: 0 0 6px; font-size: 30px; }
header p { margin: 0; color: #dbe7f7; }
.grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 20px; align-items: start; }
.card {
    background: var(--card);
    padding: 22px;
    border-radius: 16px;
    border: 1px solid var(--line);
    box-shadow: 0 8px 20px rgba(23, 32, 51, .06);
}
h2 { margin: 0 0 14px; font-size: 21px; }
label { display: block; font-weight: 700; font-size: 13px; margin: 12px 0; }
input, textarea {
    width: 100%;
    margin-top: 6px;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 11px 12px;
    font: inherit;
    font-weight: 400;
    background: #fff;
}
textarea { resize: vertical; line-height: 1.35; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
button {
    border: 0;
    padding: 12px 16px;
    border-radius: 10px;
    font-weight: 700;
    cursor: pointer;
    margin-top: 10px;
    margin-right: 8px;
}
.primary { background: var(--navy); color: white; }
.secondary { background: var(--gold); color: #1b1b1b; }
.section-editor {
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 14px;
    margin: 14px 0;
    background: #fbfcff;
}
.hint { color: var(--muted); font-size: 14px; line-height: 1.45; }
.notice {
    background: #e8f7ee;
    color: #155c33;
    border: 1px solid #b7e2c7;
    padding: 12px 14px;
    border-radius: 12px;
    margin-bottom: 18px;
}
code { background: #eef1f7; padding: 2px 5px; border-radius: 5px; }
@media (max-width: 900px) {
    .grid, .two-col { grid-template-columns: 1fr; }
    .shell { padding: 14px; }
}