/* =========================================
   Base
========================================= */
:root {
  --card-bg: rgba(255, 255, 255, 0.92);
  --border: rgba(0, 0, 0, 0.10);
  --text: #111827;
  --muted: #6b7280;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 28px 16px;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);

  /* Simple background (you can swap later) */
  background: radial-gradient(circle at top, #e5e7eb 0%, #cbd5e1 45%, #b6c0d1 100%);
  min-height: 100vh;
}

/* =========================================
   Title
========================================= */
h1 {
  text-align: center;
  margin: 0 0 18px;
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

/* =========================================
   Main App Card
========================================= */
#app {
  max-width: 960px;
  margin: 0 auto;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 18px;
}

/* =========================================
   Sections
========================================= */
section {
  padding: 10px 0;
}

h2 {
  margin: 8px 0 12px;
  font-size: 20px;
  font-weight: 800;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 16px 0;
}

/* =========================================
   Form
========================================= */
form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 14px;
}

label {
  display: block;
  font-size: 14px;
  font-weight: 700;
}

input {
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  outline: none;
  font-size: 14px;
  background: white;
}

input:focus {
  border-color: rgba(59, 130, 246, 0.6);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.12);
}

.form-actions {
  grid-column: 1 / -1;
  display: flex;
  gap: 10px;
  margin-top: 6px;
}

button {
  border: 1px solid var(--border);
  background: #111827;
  color: white;
  padding: 10px 14px;
  border-radius: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.04s ease, opacity 0.2s ease;
}

button:hover {
  opacity: 0.92;
}

button:active {
  transform: translateY(1px);
}

#cancelBtn {
  background: white;
  color: var(--text);
}

/* error message under form */
.error {
  grid-column: 1 / -1;
  margin: 6px 0 0;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(239, 68, 68, 0.35);
  background: rgba(239, 68, 68, 0.08);
  color: #991b1b;
  font-weight: 700;
}

/* =========================================
   Stats Cards
========================================= */
#stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.stat-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px 14px;
  background: white;
}

.stat-label {
  display: block;
  font-size: 13px;
  font-weight: 800;
  color: var(--muted);
}

.stat-value {
  display: block;
  margin-top: 6px;
  font-size: 30px;
  font-weight: 900;
}

/* =========================================
   Pager
========================================= */
.pager {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: flex-start;
  margin: 8px 0 12px;
}

.pager button {
  background: white;
  color: var(--text);
}

#pageInfo {
  font-weight: 800;
  color: var(--muted);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* =========================================
   Table
========================================= */
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: white;
}

thead th {
  text-align: left;
  font-size: 13px;
  color: var(--muted);
  padding: 12px 10px;
  border-bottom: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.03);
}

tbody td {
  padding: 12px 10px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  vertical-align: middle;
}

tbody tr:last-child td {
  border-bottom: none;
}

/* Actions buttons inside table */
td button {
  background: white;
  color: var(--text);
  padding: 8px 10px;
  border-radius: 10px;
  font-weight: 800;
}

td button.deleteBtn {
  border-color: rgba(239, 68, 68, 0.35);
}

/* =========================================
   Mobile
========================================= */
@media (max-width: 700px) {
  h1 {
    font-size: 30px;
  }

  #app {
    padding: 14px;
  }

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

  #stats {
    grid-template-columns: 1fr;
  }

  .pager {
    justify-content: space-between;
  }
}