* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f4f6f8;
  color: #111827;
}

.screen {
  display: none;
}

.screen.active {
  display: block;
}

.login-card {
  width: 380px;
  margin: 120px auto;
  padding: 32px;
  background: white;
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.12);
}

.login-card h1 {
  margin: 0;
  font-size: 34px;
}

.login-card p {
  color: #6b7280;
}

input,
textarea {
  width: 100%;
  margin: 8px 0;
  padding: 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
}

textarea {
  min-height: 100px;
}

button {
  padding: 10px 16px;
  border: none;
  background: #111827;
  color: white;
  border-radius: 8px;
  cursor: pointer;
  margin: 4px;
}

button:hover {
  background: #374151;
}

.error {
  color: #b91c1c;
  margin-top: 12px;
}

.result {
  margin-top: 16px;
  padding: 12px;
  background: #eef2ff;
  border-radius: 8px;
  white-space: pre-wrap;
}

.topbar {
  height: 72px;
  background: #111827;
  color: white;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}

.topbar h2 {
  margin: 0;
}

.topbar span {
  color: #d1d5db;
  font-size: 14px;
}

.layout {
  display: flex;
  min-height: calc(100vh - 72px);
}

.sidebar {
  width: 220px;
  background: white;
  border-right: 1px solid #e5e7eb;
  padding: 16px;
}

.sidebar button {
  display: block;
  width: 100%;
  margin-bottom: 10px;
  text-align: left;
}

.content {
  flex: 1;
  padding: 28px;
}

.page {
  display: none;
}

.page.active {
  display: block;
}

.cards {
  display: flex;
  gap: 16px;
}

.card {
  background: white;
  padding: 20px;
  border-radius: 14px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  margin-bottom: 16px;
  min-width: 220px;
}

.module-row {
  background: white;
  padding: 18px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.module-row span {
  font-weight: bold;
  width: 120px;
}

table {
  width: 100%;
  margin-top: 16px;
  border-collapse: collapse;
  background: white;
}

th,
td {
  padding: 10px;
  border-bottom: 1px solid #e5e7eb;
  text-align: left;
}

th {
  background: #f9fafb;
}