:root {
  --bg: #07132a;
  /* very dark blue */
  --panel: #0b2340;
  --accent: #1b6ca8;
  --muted: #9fb7d6;
  --text: #e6f2fb;
}

* {
  box-sizing: border-box
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
  background: linear-gradient(180deg, var(--bg), #041025);
  color: white;
  min-height: 100vh
}

.topbar {
  padding: 20px;
  text-align: center;
  background: linear-gradient(90deg, rgba(11, 35, 64, 0.4), rgba(3, 18, 33, 0.2));
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.5)
}

.topbar h1 {
  margin: 0;
  font-size: 1.6rem
}

.subtitle {
  margin: 6px 0 0;
  color: white;
}

.container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  padding: 18px;
  max-width: 1100px;
  margin: 18px auto
}

.card {
  background: var(--panel);
  padding: 16px;
  border-radius: 10px;
  box-shadow: 0 6px 20px rgba(2, 6, 12, 0.6)
}

.form-card {
  max-width: 520px
}

label {
  display: block;
  margin-top: 12px;
  font-size: 0.9rem;
  color: white;
}

input,
select {
  width: 100%;
  padding: 10px;
  margin-top: 6px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: transparent;
  color: white;
}

.actions {
  display: flex;
  gap: 10px;
  margin-top: 14px
}

.btn {
  padding: 10px 14px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  background: transparent;
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.06)
}

.btn.primary {
  background: var(--accent);
  color: white;
  border: none
}

.hint {
  font-size: 0.85rem;
  color: white;
  margin-top: 10px
}

.list-card table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px
}

thead th {
  font-size: 0.85rem;
  text-align: left;
  padding: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: white;
}

tbody td {
  padding: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03)
}

.message {
  margin-top: 10px;
  color: white;
}

.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
  visibility: hidden;
  opacity: 0;
  transition: opacity .18s
}

.modal[aria-hidden="false"] {
  visibility: visible;
  opacity: 1
}

.modal-content {
  width: 100%;
  max-width: 480px;
  background: linear-gradient(180deg, var(--panel), #08243b);
  padding: 18px;
  border-radius: 12px
}

@media(min-width:900px) {
  .container {
    grid-template-columns: 420px 1fr
  }
}