:root {
  /* Cores Principais */
  --color-bg: #f5f7f9;
  --color-surface: #ffffff;
  --color-text: #262626;
  --color-text-muted: #666666;
  --color-text-light: #777777;
  
  /* Cores de Marca / Ação */
  --color-primary: #2196c9;
  --color-primary-hover: #1b7a9f;
  --color-danger: #b42318;
  
  /* Cores de Feedback */
  --color-alert-bg: #fff0f0;
  --color-alert-text: #a40000;
  --color-success-bg: #effbf1;
  --color-success-text: #146c2e;
  
  /* Bordas e Sombras */
  --border-light: #e6e6e6;
  --border-input: #d8d8d8;
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.04);
  
  /* Tipografia */
  --font-base: Inter, system-ui, Arial, sans-serif;
}

/* =========================================
   Reset e Base
   ========================================= */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
}

/* =========================================
   Layout Principal
   ========================================= */
.topbar {
  height: 64px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 5vw;
  position: sticky;
  top: 0;
  z-index: 5;
}

.topbar nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.topbar form {
  margin: 0;
}

.container {
  width: min(1100px, 92vw);
  margin: 32px auto;
}

.page-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.page-head h1 {
  margin-bottom: 4px;
}

.page-head p {
  margin: 0;
  color: var(--color-text-muted);
}

/* =========================================
   Componentes: Cards
   ========================================= */
.card, 
.auth-card {
  background: var(--color-surface);
  border: 1px solid var(--border-light);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.auth-card {
  width: min(440px, 100%);
  margin: 50px auto;
}

/* =========================================
   Navegação e Botões
   ========================================= */
.brand {
  font-weight: 800;
  color: #222;
  text-decoration: none;
}

.topbar nav a,
.link-button {
  color: #444;
  text-decoration: none;
  background: none;
  border: 0;
  font: inherit;
  cursor: pointer;
  transition: color 0.2s ease;
}

.topbar nav a:hover,
.link-button:hover {
  color: var(--color-primary);
}

button,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #d4d4d4;
  border-radius: 9px;
  padding: 10px 15px;
  background: var(--color-surface);
  color: #222;
  text-decoration: none;
  cursor: pointer;
  font: inherit;
  transition: all 0.2s ease;
}

button:hover,
.button:hover {
  background: #f0f0f0;
}

button:focus-visible,
.button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.primary {
  background: var(--color-primary);
  color: var(--color-surface);
  border-color: var(--color-primary);
}

.primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.danger {
  color: var(--color-danger);
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* =========================================
   Formulários
   ========================================= */
form label {
  display: flex;
  flex-direction: column;
  gap: 7px;
  font-weight: 600;
  color: #444;
}

input,
textarea,
select {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--border-input);
  border-radius: 9px;
  background: var(--color-surface);
  font: inherit;
}

textarea {
  resize: vertical;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.status-form {
  display: flex;
  align-items: end;
  gap: 10px;
  margin-top: 24px;
}

.status-form label {
  max-width: 240px;
}

/* =========================================
   Tabelas e Grids de Dados
   ========================================= */
.item-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 100px 140px 45px;
  gap: 10px;
  margin-bottom: 10px;
}

.responsive-table {
  width: 100%;
  border-collapse: collapse;
}

.responsive-table th,
.responsive-table td {
  padding: 13px 10px;
  border-bottom: 1px solid var(--border-light);
  text-align: left;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.summary-grid div {
  background: #f7f9fa;
  padding: 14px;
  border-radius: 10px;
}

.summary-grid span {
  display: block;
  color: var(--color-text-light);
  font-size: 13px;
  margin-bottom: 4px;
}

.totals {
  margin-left: auto;
  width: min(360px, 100%);
  text-align: right;
}

.totals p {
  display: flex;
  justify-content: space-between;
}

.totals .grand {
  font-size: 20px;
  border-top: 2px solid #89cff0;
  padding-top: 12px;
}

.total-preview {
  text-align: right;
  font-size: 20px;
  margin: 24px 0;
}

/* =========================================
   Utilitários e Feedback
   ========================================= */
.full {
  grid-column: 1 / -1;
}

.spacing {
  margin-top: 24px;
}

.badge {
  background: #eef6fa;
  padding: 5px 9px;
  border-radius: 999px;
}

.empty {
  text-align: center;
  padding: 40px;
  color: var(--color-text-light);
}

.alert {
  background: var(--color-alert-bg);
  color: var(--color-alert-text);
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 14px;
}

.success {
  background: var(--color-success-bg);
  color: var(--color-success-text);
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 14px;
}

/* =========================================
   Media Queries
   ========================================= */
@media (max-width: 760px) {
  .topbar nav a {
    display: none;
  }
  
  .form-grid,
  .summary-grid {
    grid-template-columns: 1fr;
  }
  
  .item-row {
    grid-template-columns: 1fr 70px 110px 40px;
  }
  
  .page-head {
    align-items: flex-start;
    flex-direction: column;
  }
  
  .responsive-table {
    display: block;
    overflow-x: auto;
  }
}