:root {
  color-scheme: dark;
  --brief-bg: #08111e;
  --brief-page: #101c2b;
  --brief-panel: #152538;
  --brief-panel-soft: #122132;
  --brief-ink: #edf4fb;
  --brief-muted: #b4c2d1;
  --brief-soft: #8fa3b9;
  --brief-line: #30445a;
  --brief-accent: #62dfca;
  --brief-accent-soft: rgba(98, 223, 202, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--brief-bg);
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--brief-ink);
  background: var(--brief-bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.45;
}

a {
  color: var(--brief-accent);
}

a:focus-visible {
  outline: 3px solid var(--brief-accent);
  outline-offset: 3px;
}

.brief-page[data-accent="amber"] {
  --brief-accent: #f5bd68;
  --brief-accent-soft: rgba(245, 189, 104, 0.14);
}

.brief-page[data-accent="blue"] {
  --brief-accent: #8db3ff;
  --brief-accent-soft: rgba(141, 179, 255, 0.14);
}

.brief-wrap {
  min-height: 100vh;
  padding: 42px 20px;
}

.brief-page {
  width: min(100%, 1060px);
  margin: 0 auto;
  padding: 38px 44px 28px;
  border: 1px solid var(--brief-line);
  border-top: 4px solid var(--brief-accent);
  border-radius: 8px;
  background: var(--brief-page);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.34);
}

.brief-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--brief-line);
}

.brief-kicker,
.brief-label,
.brief-meta dt,
.brief-section h2,
.brief-step-number {
  color: var(--brief-accent);
  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.brief-kicker,
.brief-label {
  margin: 0;
}

.brief-label {
  text-align: right;
}

h1,
h2,
h3,
p,
ul {
  margin-top: 0;
}

h1 {
  max-width: 780px;
  margin: 0.55rem 0 0;
  font-size: 3.05rem;
  line-height: 1.02;
  letter-spacing: 0;
}

.brief-subtitle {
  max-width: 820px;
  margin: 0.9rem 0 0;
  color: var(--brief-muted);
  font-size: 1.02rem;
}

.brief-meta {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--brief-line);
}

.brief-meta dl {
  margin: 0;
}

.brief-meta dt {
  margin-bottom: 0.2rem;
}

.brief-meta dd {
  margin: 0;
  color: var(--brief-ink);
  font-size: 0.85rem;
  font-weight: 750;
}

.brief-callout {
  margin-top: 1.15rem;
  padding: 0.9rem 1rem;
  border-left: 4px solid var(--brief-accent);
  background: var(--brief-accent-soft);
}

.brief-callout strong {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--brief-ink);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.brief-callout p,
.brief-card p,
.brief-step p,
.brief-note,
.brief-footer {
  color: var(--brief-muted);
}

.brief-callout p,
.brief-card p,
.brief-step p,
.brief-note {
  margin-bottom: 0;
  font-size: 0.86rem;
}

.brief-section {
  margin-top: 1.15rem;
  break-inside: avoid;
}

.brief-section h2 {
  margin-bottom: 0.55rem;
}

.brief-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
}

.brief-card,
.brief-step {
  min-width: 0;
  padding: 0.78rem 0.85rem;
  border: 1px solid var(--brief-line);
  border-radius: 6px;
  background: var(--brief-panel);
  break-inside: avoid;
}

.brief-card h3,
.brief-step h3 {
  margin: 0.25rem 0 0.35rem;
  color: var(--brief-ink);
  font-size: 0.95rem;
  line-height: 1.18;
}

.brief-workflow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.65rem;
}

.brief-step {
  background: var(--brief-panel-soft);
}

.brief-step-number {
  display: block;
}

.brief-list {
  display: grid;
  gap: 0.35rem;
  margin: 0;
  padding-left: 1.1rem;
  color: var(--brief-muted);
  font-size: 0.85rem;
}

.brief-list li::marker {
  color: var(--brief-accent);
}

.brief-sources {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
}

.brief-source {
  min-width: 0;
  padding: 0.7rem 0.78rem;
  border-top: 2px solid var(--brief-accent);
  background: var(--brief-panel-soft);
  break-inside: avoid;
}

.brief-source a {
  display: block;
  font-size: 0.84rem;
  font-weight: 800;
  line-height: 1.25;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.brief-source p {
  margin: 0.28rem 0 0;
  color: var(--brief-soft);
  font-size: 0.75rem;
}

.brief-note {
  margin: 0.6rem 0 0;
  font-size: 0.76rem;
}

.brief-footer {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.15rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--brief-line);
  font-size: 0.76rem;
}

.brief-footer p {
  margin: 0;
}

.brief-footer a {
  font-weight: 800;
}

@media (max-width: 760px) {
  .brief-wrap {
    padding: 20px 12px;
  }

  .brief-page {
    padding: 28px 22px 22px;
  }

  .brief-header {
    display: block;
  }

  .brief-label {
    margin-top: 0.8rem;
    text-align: left;
  }

  h1 {
    font-size: 2.35rem;
  }

  .brief-meta,
  .brief-grid,
  .brief-workflow,
  .brief-sources {
    grid-template-columns: 1fr;
  }

  .brief-footer {
    display: block;
  }

  .brief-footer p + p {
    margin-top: 0.4rem;
  }
}

@page {
  size: A4;
  margin: 9mm;
}

@media print {
  :root {
    color-scheme: light;
    --brief-bg: #ffffff;
    --brief-page: #ffffff;
    --brief-panel: #f4f7fa;
    --brief-panel-soft: #f8fafc;
    --brief-ink: #142235;
    --brief-muted: #3e5063;
    --brief-soft: #5d6c7c;
    --brief-line: #c9d3de;
  }

  html,
  body {
    background: #ffffff;
  }

  body {
    color: var(--brief-ink);
    font-size: 9.2pt;
    line-height: 1.25;
  }

  .brief-wrap {
    min-height: 0;
    padding: 0;
  }

  .brief-page {
    width: auto;
    min-height: 0;
    margin: 0;
    padding: 5mm 6mm 4mm;
    border: 0;
    border-top: 2pt solid var(--brief-accent);
    border-radius: 0;
    background: #ffffff;
    box-shadow: none;
    break-after: page;
  }

  .brief-page:last-child {
    break-after: auto;
  }

  .brief-header {
    padding-bottom: 5pt;
  }

  h1 {
    font-size: 25pt;
  }

  .brief-subtitle {
    margin-top: 5pt;
    font-size: 9.6pt;
  }

  .brief-meta {
    gap: 8pt;
    padding: 5pt 0;
  }

  .brief-kicker,
  .brief-label,
  .brief-meta dt,
  .brief-section h2,
  .brief-step-number {
    font-size: 6.4pt;
  }

  .brief-meta dd {
    font-size: 7.8pt;
  }

  .brief-callout,
  .brief-section {
    margin-top: 7pt;
  }

  .brief-callout {
    padding: 5pt 7pt;
  }

  .brief-callout strong {
    margin-bottom: 2pt;
    font-size: 7.2pt;
  }

  .brief-callout p,
  .brief-card p,
  .brief-step p,
  .brief-note {
    font-size: 7.8pt;
  }

  .brief-section h2 {
    margin-bottom: 4pt;
  }

  .brief-grid,
  .brief-workflow,
  .brief-sources {
    gap: 4pt;
  }

  .brief-card,
  .brief-step,
  .brief-source {
    padding: 5pt 6pt;
    border-radius: 3pt;
  }

  .brief-card h3,
  .brief-step h3 {
    margin: 2pt 0 2pt;
    font-size: 8.5pt;
  }

  .brief-list {
    gap: 2pt;
    font-size: 7.8pt;
  }

  .brief-source {
    border-top-width: 1.5pt;
  }

  .brief-source a {
    font-size: 7.8pt;
  }

  .brief-source p {
    margin-top: 2pt;
    font-size: 6.8pt;
  }

  .brief-note {
    margin-top: 4pt;
    font-size: 6.8pt;
  }

  .brief-footer {
    margin-top: 7pt;
    padding-top: 4pt;
    font-size: 6.8pt;
  }

  a {
    color: inherit;
  }
}