body { background: #f0f0f0; color: #1a1a1a; }
a { text-decoration: underline; text-underline-offset: 3px; }
:is(a, button):focus-visible { outline: 3px solid #6750c4; outline-offset: 4px; }
.brief-toolbar { max-width: 900px; margin: 24px auto; padding: 0 24px; display: flex; justify-content: space-between; align-items: center; gap: 20px; font-size: 14px; }
.brief-toolbar button { padding: 12px 18px; background: #1a1a1a; color: white; border-radius: 5px; min-height: 44px; }
.brief { max-width: 850px; margin: 0 auto 60px; padding: 52px 60px; background: white; border: 1px solid #dddddd; }
.brief-brand { display: flex; align-items: center; gap: 4px; font-size: 25px; font-weight: 700; letter-spacing: -.06em; margin-bottom: 42px; }
.brief-brand { font-family: var(--font-mono); font-size: 16px; text-transform: uppercase; letter-spacing: .08em; }
.brief-brand span { margin-left: auto; font-family: var(--font-mono); font-size: 10px; font-weight: 400; letter-spacing: .03em; }
h1 { font-weight: 300; font-size: 40px; letter-spacing: -.045em; line-height: 1.15; margin-bottom: 20px; }
.brief-intro { font-size: 16px; line-height: 1.7; }
.brief-note { font-size: 12px; color: #626262; line-height: 1.7; margin-top: 16px; }
.brief section { padding: 26px 0 0; margin-top: 26px; border-top: 1px solid #dddddd; }
h2 { font-size: 18px; font-weight: 500; margin-bottom: 14px; }
ul { padding-left: 18px; list-style: disc; }
li { font-size: 13px; line-height: 1.65; margin: 8px 0; }
table { border-collapse: collapse; width: 100%; font-size: 12px; line-height: 1.6; }
th, td { padding: 10px; border-bottom: 1px solid #dddddd; text-align: left; vertical-align: top; }
thead { background: #f0f0f0; }
tbody th { width: 30%; }
.brief-close p { font-size: 13px; line-height: 1.7; margin-top: 10px; }
.brief footer { background: none; padding: 20px 0 0; margin-top: 24px; border-top: 1px solid #dddddd; font-size: 10px; color: #626262; }
@media (max-width: 600px) {
    .brief { margin: 0 12px 24px; padding: 28px 22px; }
    h1 { font-size: 32px; }
    .brief-brand { flex-wrap: wrap; margin-bottom: 28px; }
    .brief-brand span { width: 100%; margin: 8px 0 0; }
    .brief-toolbar { font-size: 12px; padding: 0 14px; }
}
@media print {
    @page { size: auto; margin: 15mm; }
    body { background: white; }
    .brief-toolbar { display: none; }
    .brief { margin: 0; padding: 0; border: 0; max-width: none; }
    .brief-brand { margin-bottom: 20px; }
    h1 { font-size: 30px; }
    .brief section { padding-top: 18px; margin-top: 18px; }
    h2 { break-after: avoid; }
    li, tr, .brief-close { break-inside: avoid; }
    a { color: inherit; text-decoration: none; }
    .brief-note, .brief footer { color: #444444; }
}