:root {
  --color-bg: #f5f7fa;
  --color-surface: #ffffff;
  --color-border: #e2e6ec;
  --color-text: #1f2937;
  --color-text-muted: #667085;
  --color-accent: #0f766e;
  --color-accent-dark: #0b5750;
  --color-accent-light: #e6f5f3;
  --color-danger: #b91c1c;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 3px rgba(16, 24, 40, 0.08);
  --shadow-md: 0 4px 16px rgba(16, 24, 40, 0.10);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #12151a;
    --color-surface: #1b1f27;
    --color-border: #2a2f3a;
    --color-text: #e6e9ee;
    --color-text-muted: #9aa3b2;
    --color-accent: #2dd4bf;
    --color-accent-dark: #14b8a6;
    --color-accent-light: #113330;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

.app-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  padding: 14px 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  padding: 4px 0;
}

.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--color-accent);
  color: white;
  font-size: 0.85rem;
  font-weight: 800;
}

main {
  padding: 32px 20px 64px;
}

h1 {
  font-size: 1.8rem;
  margin-bottom: 4px;
}

h2 {
  font-size: 1.5rem;
  margin-top: 4px;
}

.subtitle {
  color: var(--color-text-muted);
  margin-top: 0;
  margin-bottom: 28px;
}

.view-intro {
  color: var(--color-text-muted);
  margin-top: 0;
}

.view {
  display: none;
}

.view.active {
  display: block;
  animation: fadeIn 0.15s ease-in;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.calc-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 22px 18px;
  text-align: left;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.calc-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.card-icon {
  font-size: 1.8rem;
}

.card-title {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-text);
}

.card-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.btn-back {
  background: none;
  border: none;
  color: var(--color-accent);
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  margin-bottom: 12px;
  font-size: 0.95rem;
}

.btn-back:hover {
  text-decoration: underline;
}

.calc-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 520px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 4px;
}

.field label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.field input,
.field select {
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  background: var(--color-bg);
  color: var(--color-text);
  width: 100%;
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
}

.input-group {
  display: flex;
  gap: 8px;
}

.input-group input {
  flex: 1;
}

.input-group select {
  flex: 0 0 auto;
  width: auto;
}

.btn-primary {
  background: var(--color-accent);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  padding: 12px 20px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.12s ease;
}

.btn-primary:hover {
  background: var(--color-accent-dark);
}

.result-card {
  margin-top: 24px;
  background: var(--color-accent-light);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-lg);
  padding: 24px;
  max-width: 640px;
}

.result-card.hidden {
  display: none;
}

.result-headline {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-accent-dark);
  margin: 0 0 4px;
}

.result-sub {
  color: var(--color-text-muted);
  margin: 0 0 16px;
  font-size: 0.9rem;
}

.result-rows {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.result-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 0;
  border-bottom: 1px dashed var(--color-border);
  font-size: 0.92rem;
}

.result-row:last-child {
  border-bottom: none;
  font-weight: 700;
}

.result-row .label {
  color: var(--color-text-muted);
}

.result-row .value {
  font-weight: 600;
  white-space: nowrap;
}

.detail-table-wrap {
  overflow-x: auto;
  margin-top: 16px;
}

.detail-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  min-width: 480px;
}

.detail-table th,
.detail-table td {
  padding: 8px 10px;
  text-align: right;
  border-bottom: 1px solid var(--color-border);
}

.detail-table th:first-child,
.detail-table td:first-child {
  text-align: left;
}

.detail-table thead th {
  color: var(--color-text-muted);
  font-weight: 600;
}

.tables-side-by-side {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 700px) {
  .tables-side-by-side {
    grid-template-columns: 1fr 1fr;
  }
}

.info-banner {
  background: var(--color-accent-light);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-size: 0.88rem;
  color: var(--color-text);
  margin-bottom: 16px;
  max-width: 520px;
}

.info-banner.warning {
  background: #fff7e6;
  border-color: #f0b429;
  color: #7a4d00;
}

@media (prefers-color-scheme: dark) {
  .info-banner.warning {
    background: #332600;
    color: #ffd873;
  }
}

.info-banner.hidden {
  display: none;
}

.error-text {
  color: var(--color-danger);
  font-size: 0.85rem;
}

.app-footer {
  border-top: 1px solid var(--color-border);
  padding: 24px 0;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  text-align: center;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 20px;
  margin-bottom: 14px;
}

.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 600;
}

.footer-links a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.footer-disclaimer {
  max-width: 640px;
  margin: 0 auto 8px;
}

.footer-copy {
  margin: 0;
  opacity: 0.8;
}

/* ===================== Conteúdo explicativo das calculadoras ===================== */

.calc-content {
  max-width: 720px;
  margin-top: 32px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  box-shadow: var(--shadow-sm);
}

.calc-content h2 {
  font-size: 1.15rem;
  margin-top: 0;
}

.calc-content h3 {
  font-size: 1rem;
  margin-bottom: 6px;
  color: var(--color-accent-dark);
}

.calc-content p {
  margin-top: 0;
  margin-bottom: 14px;
  color: var(--color-text);
}

.calc-content p:last-child {
  margin-bottom: 0;
}

.calc-content .example-box {
  background: var(--color-accent-light);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-size: 0.92rem;
}

/* ===================== Páginas institucionais ===================== */

.static-page {
  max-width: 720px;
}

.static-page h2 {
  font-size: 1.2rem;
  margin-top: 28px;
}

.static-page p {
  margin-bottom: 14px;
}

.static-page ul {
  margin: 0 0 14px;
  padding-left: 22px;
}

.static-page li {
  margin-bottom: 6px;
}

.static-page .updated-at {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.contact-form {
  max-width: 480px;
}

.contact-form textarea {
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  background: var(--color-bg);
  color: var(--color-text);
  width: 100%;
  font-family: inherit;
  resize: vertical;
}

.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
}

.contact-direct {
  margin-top: 20px;
  font-size: 0.92rem;
}

.contact-direct a {
  color: var(--color-accent);
  font-weight: 600;
}

/* ===================== Banner de cookies (LGPD) ===================== */

.cookie-banner {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 100;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -4px 16px rgba(16, 24, 40, 0.12);
  padding: 16px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 14px;
}

.cookie-banner p {
  margin: 0;
  max-width: 640px;
  font-size: 0.88rem;
  color: var(--color-text);
  flex: 1 1 320px;
}

.cookie-banner a {
  color: var(--color-accent);
  font-weight: 600;
}

.cookie-banner button {
  flex: 0 0 auto;
}