/* Implementado exclusivamente por task-005-frontend-002. */

:root {
  --color-bg-base: #fdfbf7; /* creme */
  --color-surface: #ffffff; /* clara */
  --color-surface-hover: #f5f3ee;
  --color-primary: #1b5e20; /* verde profundo */
  --color-primary-hover: #2e7d32;
  --color-accent: #ff7043; /* coral */
  --color-text-main: #2c2c2c;
  --color-text-muted: #5e5e5e;
  --color-border: #e0e0e0;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.05);

  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 1rem;
  --spacing-4: 1.5rem;
  --spacing-5: 2rem;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  margin: 0;
  padding: 0;
  background-color: var(--color-bg-base);
  color: var(--color-text-main);
  font-family: var(--font-family);
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Layout */
.app-container {
  display: grid;
  grid-template-columns: 250px 1fr;
  min-height: 100vh;
}

@media (max-width: 768px) {
  .app-container {
    grid-template-columns: 1fr;
  }
}

.sidebar {
  background-color: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: var(--spacing-3);
  display: flex;
  flex-direction: column;
}

@media (max-width: 768px) {
  .sidebar {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }
}

.sidebar-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-4);
}

.nav-menu {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

@media (max-width: 768px) {
  .nav-menu {
    flex-direction: row;
    overflow-x: auto;
  }
}

.nav-link {
  text-decoration: none;
  color: var(--color-text-main);
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: 4px;
  display: block;
  font-weight: 500;
  transition: background-color 0.2s, color 0.2s;
}

.nav-link:hover, .nav-link:focus-visible {
  background-color: var(--color-surface-hover);
}

.nav-link.active {
  background-color: var(--color-primary);
  color: #fff;
}

.main-content {
  padding: var(--spacing-4);
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

/* Header */
.top-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-4);
  flex-wrap: wrap;
  gap: var(--spacing-3);
}

.date-display {
  font-size: 1.125rem;
  color: var(--color-text-muted);
}

/* Dashboard Metrics */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-5);
}

.metric-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--spacing-3);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.metric-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-1);
}

.metric-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
}

/* Sections */
.dashboard-section {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--spacing-4);
  margin-bottom: var(--spacing-4);
  box-shadow: var(--shadow-md);
}

.dashboard-section h2 {
  margin-top: 0;
  font-size: 1.25rem;
  margin-bottom: var(--spacing-3);
  color: var(--color-text-main);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #fff;
}

.btn-primary:hover, .btn-primary:focus-visible {
  background-color: var(--color-primary-hover);
}

.btn-accent {
  background-color: var(--color-accent);
  color: #fff;
}

.btn-accent:hover, .btn-accent:focus-visible {
  background-color: #e65c2e;
}

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Tables / Lists */
.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th, .data-table td {
  padding: var(--spacing-2);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

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

@media (max-width: 600px) {
  .data-table, .data-table tbody, .data-table tr, .data-table td {
    display: block;
  }
  .data-table thead {
    display: none;
  }
  .data-table tr {
    margin-bottom: var(--spacing-3);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: var(--spacing-2);
  }
  .data-table td {
    border-bottom: none;
    padding: 0.25rem 0;
    display: flex;
    justify-content: space-between;
  }
  .data-table td::before {
    content: attr(data-label);
    font-weight: 600;
    margin-right: var(--spacing-2);
  }
}

/* Forms */
.form-group {
  margin-bottom: var(--spacing-3);
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-1);
}

.form-control {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-family: inherit;
  font-size: 1rem;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(27, 94, 32, 0.2);
}

/* Alerts / States */
.alert {
  padding: var(--spacing-3);
  border-radius: 4px;
  margin-bottom: var(--spacing-3);
}

.alert-error {
  background-color: #ffebee;
  color: #c62828;
  border: 1px solid #ffcdd2;
}

.empty-state {
  margin: 0;
  padding: var(--spacing-3);
  border: 1px dashed var(--color-border);
  border-radius: 4px;
  color: var(--color-text-muted);
  text-align: center;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Animations and reduced motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}