body { min-height: 100vh; }

.brief-shell {
  width: min(920px, calc(100% - 40px));
  margin: 0 auto;
}

.brief-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 26px 0;
  border-bottom: 1px solid var(--border);
}

.brief-brand {
  color: var(--fg);
  font-family: var(--f-head);
  font-size: 1.42rem;
  font-weight: 600;
  text-decoration: none;
}

.brief-hero { padding: clamp(54px, 10vw, 100px) 0 clamp(48px, 7vw, 72px); }
.brief-hero h1 { max-width: 13ch; margin-bottom: 20px; }
.brief-lead { max-width: 57ch; margin-bottom: 30px; font-size: clamp(1.08rem, 2vw, 1.25rem); }

.voice-command {
  display: grid;
  gap: 8px;
  max-width: 680px;
  padding: 22px 24px;
  border: 1px solid var(--border-strong);
  border-radius: 14px;
  background: var(--accent-soft);
}
.voice-command span, .plain-link { color: var(--accent); font-size: .78rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.voice-command strong { font-family: var(--f-head); font-size: clamp(1.18rem, 2.5vw, 1.5rem); font-weight: 500; line-height: 1.25; }
.plain-link { margin: 18px 0 0; }
.plain-link a { color: var(--accent-strong); }

.brief-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 22px; padding: 0 0 clamp(54px, 8vw, 84px); }
.brief-card { padding: clamp(26px, 4vw, 38px); border: 1px solid var(--border); border-radius: 18px; background: var(--surface); }
.brief-card-accent { background: var(--accent-soft); border-color: var(--border-strong); }
.card-label { margin: 0 0 16px; color: var(--accent); font-size: .75rem; font-weight: 700; letter-spacing: .15em; text-transform: uppercase; }
.brief-card h2 { margin-bottom: 24px; font-size: clamp(1.5rem, 3vw, 2rem); }

.brief-steps, .brief-rules { margin: 0; padding: 0; list-style: none; }
.brief-steps { display: grid; gap: 16px; }
.brief-steps li { display: grid; grid-template-columns: 32px 1fr; gap: 12px; align-items: start; }
.brief-steps span { color: var(--accent); font-family: var(--f-head); font-size: 1.1rem; }
.brief-steps p { margin: 0; font-size: .95rem; line-height: 1.55; }
.brief-rules { display: grid; gap: 13px; }
.brief-rules li { position: relative; padding-left: 20px; color: var(--muted); font-size: .95rem; line-height: 1.5; }
.brief-rules li::before { position: absolute; left: 0; color: var(--accent); content: '•'; }

.brief-context { padding: clamp(54px, 8vw, 84px) 0; border-top: 1px solid var(--border); }
.brief-context > h2 { max-width: 18ch; }
.context-columns { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-top: 36px; }
.context-columns h3 { margin-bottom: 10px; font-size: 1.25rem; }
.context-columns p { margin: 0; font-size: .95rem; }

.privacy-note { margin-bottom: 56px; padding: 18px 20px; border-left: 3px solid var(--accent); background: var(--surface-soft); color: var(--muted); font-size: .9rem; line-height: 1.55; }
.privacy-note strong { color: var(--fg); }
.brief-footer { padding: 25px 20px 32px; border-top: 1px solid var(--border); color: var(--muted); font-size: .86rem; text-align: center; }

@media (max-width: 720px) {
  .brief-shell { width: min(100% - 28px, 920px); }
  .brief-header { padding: 18px 0; }
  .brief-grid, .context-columns { grid-template-columns: 1fr; }
  .brief-grid { gap: 16px; }
  .context-columns { gap: 24px; margin-top: 28px; }
  .brief-card { border-radius: 14px; }
}

@media (max-width: 390px) {
  .brief-header { align-items: flex-start; flex-direction: column; }
}