:root {
  --bg: #9fc3d5;
  --card: #cde5f7;
  --text: #1e293b;
  --accent: #fef08a;
  --btn: #fb7185;
  --border: #e2e8f0;
  --shadow: rgba(0, 0, 0, 0.1);
}

.dark-mode {
  --bg: #1f2937;
  --card: #374151;
  --text: #f1f5f9;
  --accent: #facc15;
  --btn: #f43f5e;
  --border: #4b5563;
  --shadow: rgba(255, 255, 255, 0.05);
}

body {
  font-family: 'IBM Plex Sans', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 20px;
  display: flex;
  justify-content: center;
  transition: background-color 0.3s ease;
}

.container {
  background-color: var(--card);
  border-radius: 20px;
  padding: 24px;
  max-width: 600px;
  width: 100%;
  box-shadow: 6px 6px 0 var(--shadow);
  border: 2px dashed var(--accent);
  transition: background-color 0.3s ease;
}

h1, h2 {
  text-align: center;
  margin-bottom: 20px;
  font-size: 20px;
}

.pixel-heart {
  font-size: 18px;
  margin-right: 5px;
  filter: drop-shadow(1px 1px 0 var(--text));
}

form {
  display: flex;
  flex-direction: column;
}

.form-group {
  margin-bottom: 14px;
}

label {
  display: block;
  margin-bottom: 4px;
  font-weight: 600;
  font-size: 13px;
}

input,
textarea {
  width: 100%;
  padding: 8px;
  border: 2px solid var(--border);
  border-radius: 6px;
  background-color: #fff;
  font-size: 13px;
}

textarea {
  height: 60px;
  resize: vertical;
}

.submit-btn {
  background-color: var(--btn);
  color: white;
  font-weight: bold;
  padding: 8px 14px;
  border-radius: 10px;
  border: none;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.2s ease;
  box-shadow: 3px 3px 0 var(--text);
}

.submit-btn:hover {
  background-color: #f43f5e;
}

#responseMessage {
  margin: 10px 0;
  font-weight: 600;
  color: #22c55e;
  font-size: 13px;
  text-align: center;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-top: 16px;
}

thead {
  background-color: var(--accent);
}

#receiptTable thead th {
  color: black;
}

th, td {
  padding: 8px;
  border: 1px dashed var(--border);
  text-align: center;
}

tbody tr:nth-child(even) {
  background-color: rgba(255, 255, 255, 0.5);
}

.action-btn {
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 12px;
  border: none;
  cursor: pointer;
}

.action-btn.edit {
  background-color: #10b981;
  color: white;
}

.action-btn.delete {
  background-color: #ef4444;
  color: white;
}

.theme-toggle {
  position: absolute;
  top: 15px;
  right: 15px;
}

.theme-toggle button {
  background: var(--accent);
  color: black;
  font-size: 14px;
  padding: 6px 10px;
  border-radius: 6px;
  border: 2px solid var(--text);
  cursor: pointer;
}

/* Image Upload Custom Button */
.custom-upload-btn {
  display: inline-block;
  background-color: var(--btn);
  color: white;
  padding: 6px 12px;
  font-size: 13px;
  font-weight: bold;
  border-radius: 10px;
  cursor: pointer;
  box-shadow: 3px 3px 0 var(--text);
  margin-bottom: 10px;
  transition: background 0.2s ease;
}

.custom-upload-btn:hover {
  background-color: #f43f5e;
}

/* Image Preview */
.image-preview {
  margin-top: 10px;
  max-width: 150px;
  max-height: 150px;
  border: 2px dashed var(--border);
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

.image-preview img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

/* 🔓 Logout Button Bar */
.logout-bar {
  display: flex;
  justify-content: flex-end;
  margin-top: -10px;
  margin-bottom: 12px;
}

.logout-button {
  background-color: #ff8585;
  color: white;
  border: 2px solid #d24646;
  padding: 6px 14px;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 12px;
  font-weight: bold;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 2px 2px 0 var(--text);
}

.logout-button:hover {
  background-color: #ff6b6b;
}