:root {
  --bg-color: #f8f9fa;
  --card-bg: #ffffff;
  --text-main: #252525;
  --text-muted: #666666;
  --border-color: #e5e7eb;
  --primary: #252525;
  --primary-hover: #3d3d3d;
  --radius: 8px;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
header {
  background-color: var(--primary);
  color: #ffffff;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

header h1 a {
  color: #ffffff;
  text-decoration: none;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

header nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

header nav a {
  color: #e5e7eb;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

header nav a:hover {
  color: #ffffff;
}

/* Main Layout */
main {
  flex: 1;
  padding: 2rem;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

/* Cards & Sections */
.card, section {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}

.card-title, h2, h3 {
  color: var(--text-main);
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

h2 { font-size: 1.35rem; }
h3 { font-size: 1.1rem; }

/* Grid metrics */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.metric-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  box-shadow: 0 2px 6px rgba(0,0,0,0.03);
}

.metric-card .label {
  font-size: 0.825rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.metric-card .value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-main);
}

.metric-card .subtext {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Forms & Inputs */
form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  flex: 1;
  min-width: 200px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="file"],
textarea,
select {
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 0.9rem;
  background-color: #ffffff;
  color: var(--text-main);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
}

input:focus, textarea:focus, select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(37, 37, 37, 0.1);
}

textarea {
  min-height: 120px;
  font-family: inherit;
  resize: vertical;
}

/* Buttons */
button, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.2rem;
  background-color: var(--primary);
  color: #ffffff;
  border: 1px solid var(--primary);
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.2s, transform 0.1s;
}

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

.btn-secondary {
  background-color: #ffffff;
  color: var(--primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: #f3f4f6;
  border-color: #d1d5db;
}

.btn-danger {
  background-color: #ef4444;
  border-color: #ef4444;
  color: #ffffff;
}

.btn-danger:hover {
  background-color: #dc2626;
  border-color: #dc2626;
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}

/* Tables */
.table-container {
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  background-color: #ffffff;
  text-align: left;
}

th {
  background-color: #f9fafb;
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
}

td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.9rem;
  color: var(--text-main);
  vertical-align: middle;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background-color: #f9fafb;
}

/* Status badges */
.status {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.6rem;
  border-radius: 9999px;
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.status-rodando {
  background-color: #dcfce7;
  color: #166534;
  border: 1px solid #bbf7d0;
}

.status-pausado {
  background-color: #fef9c3;
  color: #854d0e;
  border: 1px solid #fef08a;
}

.status-parado {
  background-color: #f1f5f9;
  color: #475569;
  border: 1px solid #e2e8f0;
}

.status-erro {
  background-color: #fee2e2;
  color: #991b1b;
  border: 1px solid #fca5a5;
}

/* Logs */
pre#logs {
  background-color: #252525;
  color: #a7f3d0;
  padding: 1.25rem;
  border-radius: 6px;
  height: 320px;
  overflow-y: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.825rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-all;
}

/* Tabs & View Switcher */
.tab-buttons {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.25rem;
}

.tab-btn {
  padding: 0.6rem 1.2rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  border-radius: 0;
}

.tab-btn:hover {
  background: none;
  color: var(--text-main);
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Login Center Page */
.login-container {
  max-width: 400px;
  margin: 4rem auto;
  padding: 2rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.login-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.login-header h2 {
  font-size: 1.5rem;
  color: var(--primary);
}

.alert-error {
  background-color: #fee2e2;
  border: 1px solid #fca5a5;
  color: #991b1b;
  padding: 0.75rem 1rem;
  border-radius: 6px;
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

/* Utility */
.actions-cell {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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