:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --primary: #005f73;
  --primary-strong: #0a9396;
  --text: #1f2933;
  --muted: #5b6773;
  --danger: #b42318;
  --ok: #067647;
  --border: #d0d7e2;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(150deg, #eef4ff, #f7fffe 60%, #eef9f4);
  color: var(--text);
}

.app {
  width: min(1000px, 94vw);
  margin: 2rem auto;
  background: var(--panel);
  border-radius: 12px;
  padding: 1.2rem;
  border: 1px solid var(--border);
  box-shadow: 0 10px 35px rgba(15, 23, 42, 0.08);
}

h1,
h2 {
  margin: 0 0 1rem;
}

.tabs {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.tab-button {
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--text);
  border-radius: 10px;
  padding: 0.55rem 0.9rem;
  cursor: pointer;
}

.tab-button.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.tab-panel {
  display: none;
}

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

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
  align-items: end;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-weight: 600;
  color: var(--muted);
}

input {
  border: 1px solid var(--border);
  border-radius: 8px;
  min-height: 40px;
  padding: 0.55rem 0.65rem;
  font-size: 0.95rem;
}

button {
  min-height: 40px;
  border: 0;
  border-radius: 8px;
  background: var(--primary-strong);
  color: #fff;
  cursor: pointer;
  padding: 0.55rem 0.9rem;
  font-weight: 600;
}

button.secondary {
  background: #e8eef5;
  color: var(--text);
}

button.delete {
  background: var(--danger);
}

.feedback {
  min-height: 1.2rem;
  margin-top: 1rem;
  font-weight: 600;
}

.feedback.ok {
  color: var(--ok);
}

.feedback.error {
  color: var(--danger);
}

.welcome {
  margin-top: 1rem;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
}

.hidden {
  display: none;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 780px;
}

th,
td {
  border: 1px solid var(--border);
  padding: 0.55rem;
  text-align: left;
}

.actions {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

#managerHint {
  color: var(--muted);
}

@media (max-width: 760px) {
  .app {
    margin: 1rem auto;
    padding: 1rem;
  }

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