:root {
  --azul: #0050a0;
  --azul-claro: #eef3f8;
  --ambar: #eea23e;
  --ambar-claro: #fdecd5;
  --vermelho: #c00;
  --mpt-print-action: #6a4c93;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: #222;
  background: #fafafa;
  font-family: "Open Sans", "Segoe UI", Arial, Helvetica, sans-serif;
  line-height: 1.6;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 12px 25px;
  background: #fff;
  border-bottom: 1px solid #ddd;
}

.site-header .logo-link {
  color: var(--azul);
  font-size: 1.2em;
  font-weight: 700;
  text-decoration: none;
}

.site-header nav {
  font-size: 0.95em;
}

.site-header nav a {
  margin-left: 18px;
  color: #333;
  text-decoration: none;
}

.site-header nav a:hover {
  color: var(--azul);
  text-decoration: underline;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 10px 25px;
  background: var(--azul-claro);
  border-bottom: 1px solid #cdd;
  font-size: 0.92em;
}

.toolbar .info {
  color: var(--azul);
  font-weight: 700;
}

.toolbar .btn {
  display: inline-block;
  padding: 8px 18px;
  color: var(--mpt-print-action);
  background: #fff;
  border: 1px solid var(--mpt-print-action);
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.95em;
  text-decoration: none;
}

.toolbar .btn:hover {
  color: #fff;
  background: var(--mpt-print-action);
}

.conteudo {
  max-width: 900px;
  margin: 25px auto;
  padding: 0 25px 60px;
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 6px;
}

.conteudo-inner {
  padding: 25px 30px;
}

h1 {
  margin-top: 10px;
  padding-bottom: 8px;
  border-bottom: 2px solid #333;
  font-size: 1.4em;
  text-align: center;
}

h1 .subtitulo {
  font-size: 0.85em;
  font-weight: 400;
}

h2 {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 30px;
  padding: 8px 12px;
  background: var(--azul-claro);
  border-left: 4px solid var(--azul);
  font-size: 1.1em;
}

.cot {
  padding: 2px 8px;
  color: #800;
  background: #ffefef;
  border-radius: 4px;
  font-size: 0.9em;
  font-weight: 400;
  white-space: nowrap;
}

.resp {
  margin: 10px 0;
  padding: 8px 12px;
  background: var(--ambar-claro);
  border-left: 4px solid var(--ambar);
}

.obs,
.calc-box {
  margin: 10px 0;
  padding: 8px 12px;
  background: #fff8e1;
  border-left: 4px solid #f0b400;
  font-size: 0.95em;
}

.calc-box {
  background: #f4f8fc;
  border-left-color: var(--azul);
}

.passos {
  margin-left: 20px;
  padding-left: 10px;
  border-left: 2px solid #ddd;
}

.passos p,
.passos li {
  font-size: 0.95em;
  line-height: 2.1;
}

.passos p {
  margin: 18px 0;
}

.passos ul,
.passos ol {
  padding-left: 24px;
}

.proc {
  display: inline-block;
  margin: 8px 0 3px;
  padding: 3px 10px;
  color: var(--azul);
  background: var(--azul-claro);
  border-left: 3px solid var(--azul);
  border-radius: 4px;
  font-style: normal;
  font-weight: 700;
}

.pontuacao {
  float: right;
  color: #666;
  font-family: Consolas, monospace;
  font-size: 0.85em;
}

hr {
  margin: 20px 0;
  border: 0;
  border-top: 1px solid #ccc;
}

table {
  width: 100%;
  max-width: 680px;
  margin: 14px auto;
  border-collapse: collapse;
}

th,
td {
  padding: 5px 10px;
  border: 1px solid #666;
  text-align: center;
}

th {
  background: #f0f0f0;
}

.table-scroll {
  max-width: 100%;
  overflow-x: auto;
}

.answer-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px 18px;
  margin: 12px 0;
}

@media (max-width: 700px) {
  .site-header,
  .toolbar {
    padding-right: 12px;
    padding-left: 12px;
  }

  .site-header nav a {
    margin-left: 10px;
  }

  .conteudo {
    margin: 12px 8px;
    padding: 0;
  }

  .conteudo-inner {
    min-width: 0;
    padding: 18px 12px;
  }

  .passos {
    min-width: 0;
    margin-left: 0;
    padding-left: 10px;
  }

  .passos p {
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
  }

  .pontuacao {
    float: none;
    display: inline-block;
    margin-left: 0.4em;
  }

  .answer-grid {
    grid-template-columns: 1fr;
  }
}

@media print {
  .site-header,
  .toolbar {
    display: none !important;
  }

  body::before {
    content: "Matemática Para Todos";
    position: fixed;
    top: 50%;
    left: 50%;
    z-index: 9999;
    color: rgba(0, 80, 160, 0.09);
    font-size: 54pt;
    font-weight: 700;
    letter-spacing: 0.04em;
    line-height: 1;
    pointer-events: none;
    transform: translate(-50%, -50%) rotate(-35deg);
    white-space: nowrap;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .conteudo {
    margin: 0;
    padding: 0;
    border: none;
    box-shadow: none;
  }

  h2,
  .obs {
    break-after: avoid-page;
    page-break-after: avoid;
  }

  .passos,
  .resp,
  .calc-box,
  .passos p,
  .passos table {
    break-inside: avoid-page;
    page-break-inside: avoid;
  }

  @page {
    margin: 2cm;
  }
}