* {
  box-sizing: border-box;
  font-family: 'Segoe UI', system-ui, sans-serif;
  margin: 0;
}

body {
  background: #f5f7fb;
  color: #1f1f1f;
  min-height: 100vh;
}

header {
  background: #1d3557;
  color: white;
  padding: 1rem;
  text-align: center;
}

nav {
  background: #457b9d;
  padding: 0.5rem 1rem;
}

nav button {
  background: transparent;
  border: none;
  color: white;
  font-size: 1rem;
  padding: 0.5rem 1rem;
  cursor: pointer;
}

nav button.active {
  border-bottom: 2px solid #f1faee;
}

main {
  padding: 2rem 1rem;
}

.tab-panel {
  background: white;
  border-radius: 1rem;
  padding: 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.status {
  min-width: 220px;
  color: #ffffff;
  padding: 0.25rem 1rem;
  border-radius: 0.75rem;
  font-size: 0.9rem;
}

.table-wrapper {
  overflow-x: auto;
  margin-top: 1rem;
}

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

thead {
  background: #d8e2ef;
}

th,
td {
  text-align: left;
  padding: 0.75rem;
  border-bottom: 1px solid #e6ecf8;
}

.actions button {
  margin-right: 0.25rem;
}

.empty {
  padding: 2rem;
  text-align: center;
  color: #73808d;
}

form {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

label {
  display: flex;
  flex-direction: column;
  font-size: 0.9rem;
  gap: 0.35rem;
}

input {
  padding: 0.6rem;
  border-radius: 0.5rem;
  border: 1px solid #cfd6e9;
  font-size: 1rem;
}

.form-actions {
  grid-column: 1 / -1;
  display: flex;
  gap: 0.6rem;
}

button[type='submit'] {
  background: #1d3557;
  color: white;
  border: none;
  padding: 0.8rem 1.2rem;
  border-radius: 0.6rem;
  cursor: pointer;
}

button.ghost {
  background: transparent;
  border: 1px solid #1d3557;
  color: #1d3557;
}

@media (max-width: 600px) {
  .toolbar {
    flex-direction: column;
    align-items: flex-start;
  }

  form {
    grid-template-columns: 1fr;
  }
}

button.hidden {
  display: none;
}