/* ===== GLOBAL ===== */
body {
  font-family: 'Segoe UI', sans-serif;
  background: #eef2f7;
  margin: 0;
  padding: 0;
}

h2, h3 {
  margin: 5px 0;
}

/* ===== CONTAINER ===== */
.container {
  padding: 15px;
  max-width: 500px;
  margin: auto;
}

/* ===== CARD (LOGIN) ===== */
.card {
  background: white;
  padding: 20px;
  border-radius: 16px;
  width: 260px;
  margin: 120px auto;
  text-align: center;
  box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

/* ===== INPUT ===== */
input {
  width: 100%;
  padding: 12px;
  margin: 8px 0;
  border-radius: 8px;
  border: 1px solid #ddd;
  outline: none;
}

input:focus {
  border-color: #007bff;
}

/* ===== BUTTON ===== */
button {
  width: 100%;
  padding: 12px;
  margin-top: 8px;
  border-radius: 10px;
  border: none;
  background: linear-gradient(45deg, #007bff, #00c6ff);
  color: white;
  font-weight: bold;
  cursor: pointer;
  transition: 0.2s;
}

button:hover {
  transform: scale(1.03);
}

/* ===== USER / EXPENSE CARD ===== */
.user, .user-card {
  background: white;
  padding: 14px;
  margin: 10px 0;
  border-radius: 14px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  transition: 0.2s;
}

.user-card:hover {
  transform: translateY(-2px);
}

/* ===== NAME ===== */
.user-card strong {
  font-size: 16px;
  color: #333;
}

/* ===== AMOUNT ===== */
.amount {
  font-size: 18px;
  font-weight: bold;
  color: #007bff;
}

/* ===== DATE ===== */
small {
  color: #777;
  font-size: 12px;
}

/* ===== POPUP ===== */
.popup {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(3px);
}

.popup-content {
  background: white;
  padding: 20px;
  margin: 80px auto;
  width: 90%;
  max-width: 350px;
  border-radius: 16px;
  animation: fadeIn 0.3s ease;
}

/* ===== CHECKBOX LIST ===== */
#userCheckboxes label {
  display: block;
  padding: 6px 0;
}

/* ===== PAGINATION ===== */
#pagination {
  text-align: center;
  margin-top: 15px;
}

#pagination button {
  width: auto;
  padding: 8px 12px;
  margin: 3px;
  border-radius: 6px;
  background: #ddd;
  color: #333;
}

#pagination button:hover {
  background: #007bff;
  color: white;
}

#pagination button.active {
  background: #007bff;
  color: white;
}

/* ===== HEADER BAR (OPTIONAL) ===== */
.header {
  background: #007bff;
  color: white;
  padding: 12px;
  text-align: center;
  font-weight: bold;
  border-bottom-left-radius: 12px;
  border-bottom-right-radius: 12px;
}

/* ===== ANIMATION ===== */
@keyframes fadeIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}