*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #F7F4EF;
  --surface: #FFFFFF;
  --ink: #1A1510;
  --ink-soft: #6B6157;
  --accent: #D4541A;
  --accent-light: #FBE9DF;
  --accent-dark: #A83E10;
  --green: #2A7D4F;
  --green-light: #E0F2EA;
  --border: #E2DDD6;
  --shadow: 0 2px 12px rgba(26,21,16,0.08);
}

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  padding: 0 16px 60px;
}

/* HEADER */
header {
  max-width: 680px;
  margin: 0 auto;
  padding: 48px 0 36px;
  text-align: center;
}

.badge {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
}

h1 {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(32px, 6vw, 52px);
  line-height: 1.1;
  color: var(--ink);
  margin-bottom: 12px;
}

h1 span {
  color: var(--accent);
}

.subtitle {
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.6;
  max-width: 440px;
  margin: 0 auto;
}

/* CARD PRINCIPAL */
.card {
  background: var(--surface);
  border-radius: 20px;
  box-shadow: var(--shadow);
  max-width: 680px;
  margin: 0 auto 24px;
  padding: 32px;
}

/* SEÇÃO DE CÔMODOS */
.section-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 20px;
}

.comodos-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.comodo-row {
  display: grid;
  grid-template-columns: 1fr 76px 76px 76px 36px;
  gap: 8px;
  align-items: center;
}

.comodo-row label {
  display: none;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.field-label {
  font-size: 11px;
  font-weight: 500;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

input[type="text"],
input[type="number"],
select {
  width: 100%;
  padding: 10px 12px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  color: var(--ink);
  background: var(--bg);
  transition: border-color 0.15s;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  opacity: 0.5;
}

input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
}

input.input-error {
  border-color: var(--accent);
  background: var(--accent-light);
}

.comodo-header {
  display: grid;
  grid-template-columns: 1fr 76px 76px 76px 36px;
  gap: 8px;
  margin-bottom: 8px;
}

.col-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding: 0 12px;
}

.btn-remove {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1.5px solid var(--border);
  background: transparent;
  color: var(--ink-soft);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  align-self: flex-end;
  margin-bottom: 0;
}

.btn-remove:hover {
  background: #fff0ec;
  border-color: var(--accent);
  color: var(--accent);
}

.btn-add {
  width: 100%;
  padding: 11px;
  border: 1.5px dashed var(--border);
  border-radius: 10px;
  background: transparent;
  color: var(--ink-soft);
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-add:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-light);
}

/* OPÇÕES */
.options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 8px;
}

.option-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.option-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
}

.option-hint {
  font-size: 12px;
  color: var(--ink-soft);
  margin-top: 2px;
}

select {
  padding: 10px 12px;
}

/* CHECKBOX TETO */
.checkbox-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  background: var(--bg);
  border-radius: 10px;
  cursor: pointer;
  margin-top: 16px;
}

.checkbox-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
}

.checkbox-row span {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
}

/* MENSAGEM DE ERRO */
.form-error {
  display: none;
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 500;
  margin-top: 12px;
  padding: 10px 14px;
  background: var(--accent-light);
  border-radius: 8px;
}

/* BOTÃO CALCULAR */
.btn-calcular {
  width: 100%;
  padding: 16px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 12px;
  font-family: 'DM Serif Display', serif;
  font-size: 20px;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  margin-top: 8px;
}

.btn-calcular:hover { background: var(--accent-dark); }
.btn-calcular:active { transform: scale(0.99); }

/* RESULTADO */
.resultado {
  display: none;
  max-width: 680px;
  margin: 0 auto 24px;
}

.resultado.visible { display: block; }

.resultado-header {
  text-align: center;
  margin-bottom: 20px;
}

.resultado-header h2 {
  font-family: 'DM Serif Display', serif;
  font-size: 26px;
  margin-bottom: 6px;
}

.resultado-header p {
  color: var(--ink-soft);
  font-size: 14px;
}

.latas-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

.lata-card {
  background: var(--surface);
  border-radius: 16px;
  padding: 20px 16px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 2px solid transparent;
  transition: border-color 0.15s;
}

.lata-card.recomendado {
  border-color: var(--accent);
}

.lata-tag {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
  min-height: 16px;
}

.lata-icon {
  font-size: 32px;
  margin-bottom: 8px;
  display: block;
}

.lata-tamanho {
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 4px;
}

.lata-qtd {
  font-family: 'DM Serif Display', serif;
  font-size: 36px;
  color: var(--ink);
  line-height: 1;
}

.lata-unidade {
  font-size: 13px;
  color: var(--ink-soft);
  margin-top: 2px;
}

/* DETALHES */
.detalhes-card {
  background: var(--surface);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 12px;
}

.detalhes-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 16px;
}

.detalhe-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.detalhe-row:last-child { border-bottom: none; }

.detalhe-label { color: var(--ink-soft); }
.detalhe-valor { font-weight: 600; color: var(--ink); }

/* DICA */
.dica-card {
  background: var(--green-light);
  border-radius: 16px;
  padding: 18px 20px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 12px;
}

.dica-icon { font-size: 20px; flex-shrink: 0; margin-top: 1px; }

.dica-text {
  font-size: 13px;
  color: var(--green);
  line-height: 1.6;
}

.dica-text strong { font-weight: 600; }

/* RECALCULAR */
.btn-recalcular {
  width: 100%;
  padding: 14px;
  background: transparent;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  font-family: 'DM Sans', sans-serif;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all 0.15s;
}

.btn-recalcular:hover {
  border-color: var(--ink);
  color: var(--ink);
}

/* RODAPÉ INFO */
.info-cards {
  max-width: 680px;
  margin: 0 auto 32px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.info-card {
  background: var(--surface);
  border-radius: 14px;
  padding: 18px 16px;
  text-align: center;
  box-shadow: var(--shadow);
}

.info-card .icon { font-size: 24px; margin-bottom: 8px; }
.info-card .title { font-weight: 600; font-size: 13px; margin-bottom: 4px; }
.info-card .desc { font-size: 12px; color: var(--ink-soft); line-height: 1.5; }

footer {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
  font-size: 12px;
  color: var(--ink-soft);
  line-height: 1.7;
}

@media (max-width: 520px) {
  .card { padding: 20px 16px; }
  .comodo-row { grid-template-columns: 1fr 58px 58px 58px 28px; gap: 5px; }
  .comodo-header { grid-template-columns: 1fr 58px 58px 58px 28px; gap: 5px; }
  .options-grid { grid-template-columns: 1fr; }
  .latas-grid { grid-template-columns: 1fr; }
  .info-cards { grid-template-columns: 1fr; }
  .col-label { padding: 0 6px; font-size: 10px; }
}