:root {
  --primary: #003366;
  --primary-light: #66b3ff;
  --success: #10b981;
  --danger: #ef4444;
  --bg: #f6f7f9;
  --panel: #ffffff;
  --border: #e5e7eb;
  --text: #111827;
  --muted: #6b7280;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 20px;
  font-family: system-ui, -apple-system, Segoe UI, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.company-header {
  text-align: center;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 3px solid var(--primary);
}

.company-name {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  margin: 0;
}

.company-subtitle {
  font-size: 14px;
  color: var(--muted);
  margin: 4px 0 0 0;
}

h1 {
  text-align: center;
  margin: 0 0 24px;
  font-size: 24px;
  color: var(--primary);
}

h3 {
  font-size: 16px;
  margin: 16px 0 8px;
  font-weight: 600;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
}

label {
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 4px;
  color: #374151;
}

input, select {
  width: 100%;
  padding: 10px 12px;
  font-size: 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
}

input[type="radio"] {
  width: auto;
  padding: 0;
  margin: 0;
  cursor: pointer;
}

.btn {
  padding: 10px 16px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
}

.btn:hover {
  background: var(--bg);
}

.btn:active {
  transform: translateY(1px);
}

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

.btn-primary:hover {
  background: #002247;
}

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

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

.btn-small {
  padding: 6px 12px;
  font-size: 13px;
}

.toolbar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
  margin-top: 16px;
}

.zones-table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
}

.zones-table th,
.zones-table td {
  padding: 8px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.zones-table th {
  font-weight: 600;
  background: var(--bg);
  font-size: 14px;
}

.zones-table input {
  padding: 6px 8px;
  font-size: 14px;
}

.zone-color {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  display: inline-block;
  border: 1px solid var(--border);
}

.graph-container {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin: 16px 0;
}

.svg-wrap {
  width: 100%;
  height: 500px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 768px) {
  .form-grid, .two-col {
    grid-template-columns: 1fr;
  }
}

/* Authentication Styles */
.auth-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}

.auth-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px;
  width: 100%;
  max-width: 440px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
}

.auth-error {
  color: var(--danger);
  font-size: 14px;
  margin-top: 8px;
  min-height: 20px;
}

.auth-card h2 {
  font-size: 24px;
  color: var(--text);
  margin: 0 0 20px 0;
}

.auth-card .form-group {
  margin-bottom: 16px;
}

.auth-card input {
  font-size: 15px;
  padding: 12px 14px;
}