/* Theme Variables */
:root {
    --bg-color: #f4f4f9;
    --text-color: #333;
    --container-bg: #fff;
    --border-color: #dee2e6;
    --border-color-light: #eee;
    --link-color: #007bff;
    --link-hover-color: #0056b3;
    --button-text-color: #fff;
    --shadow-color: rgba(0,0,0,0.1);
}

[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --container-bg: #1e1e1e;
    --border-color: #444;
    --border-color-light: #333;
    --link-color: #58a6ff;
    --link-hover-color: #80baff;
    --shadow-color: rgba(255,255,255,0.1);
}

/* Basic Styles */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: auto;
    background: var(--container-bg);
    padding: 20px 30px;
    border-radius: 8px;
    box-shadow: 0 2px 15px var(--shadow-color);
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color-light);
    padding-bottom: 10px;
}

#theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    padding: 0;
    line-height: 1;
}

h1, h2 {
    color: var(--text-color);
    border-bottom: 1px solid var(--border-color-light);
    padding-bottom: 10px;
}

hr {
    border: 0;
    border-top: 1px solid var(--border-color-light);
    margin: 20px 0;
}

/* Forms */
form {
    margin-bottom: 20px;
}

textarea, input[type="text"] {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 1rem;
    background-color: var(--bg-color);
    color: var(--text-color);
}

button {
    background: var(--link-color);
    color: var(--button-text-color);
    border: 0;
    padding: 10px 15px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

button:hover {
    background: var(--link-hover-color);
}

/* Status Messages */
.status-success {
    color: #155724;
    padding: 10px;
    background: #d4edda;
    border: 1px solid #c3e6cb;
    margin-bottom: 15px;
    border-radius: 4px;
}

.status-error {
    color: #721c24;
    padding: 10px;
    background: #f8d7da;
    border: 1px solid #f5c6cb;
    margin-bottom: 15px;
    border-radius: 4px;
}

/* Message Box (User Page) */
.message-box {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 5px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.message-box pre {
    white-space: pre-wrap;
    word-wrap: break-word;
    margin: 0;
    flex-grow: 1;
}

.message-box pre a {
    color: var(--link-color);
}

.message-box pre a:hover {
    color: var(--link-hover-color);
}

.message-number {
    font-weight: bold;
    font-size: 36px;
    color: var(--link-color);
    flex-shrink: 0;
    line-height: 1;
}

.message-footer {
    margin-top: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.timestamp {
    font-size: 0.75em; /* Smaller font size */
    color: #999;       /* Lighter color */
}

.copy-btn {
    background-color: #ffc107; /* Orange color from edit button */
    color: #212529; /* Dark text for better contrast */
    font-size: 0.9em;
    padding: 5px 10px;
}

.copy-btn:hover {
    background-color: #e0a800; /* Darker orange on hover */
}

/* Message Item (Control Panel) */
.message-item-control {
    border: 1px solid var(--border-color);
    padding: 10px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 15px;
    border-radius: 4px;
}

/* Add a "move" cursor to indicate items are draggable */
.message-item-control {
    cursor: move;
}

/* Style for the item being dragged */
.message-item-control.dragging {
    opacity: 0.5;
    background: var(--link-color);
}

.message-item-control .message-content {
    flex-grow: 1;
}

.message-item-control .message-text pre {
    margin: 0 0 10px 0;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.message-item-control .message-text pre a {
    color: var(--link-color);
}

.message-item-control .message-text pre a:hover {
    color: var(--link-hover-color);
}

.message-item-control .message-text small {
    font-size: 0.75em; /* Smaller font size */
    color: #999;       /* Lighter color */
}

.message-item-control .message-buttons {
    display: flex;
    gap: 5px;
    margin-top: 10px;
    flex-shrink: 0; /* Prevents buttons from shrinking */
}

/* Use CSS variables for control panel buttons for theme consistency */
.edit-btn { background-color: #ffc107; color: #212529; }
.edit-btn:hover { background-color: #e0a800; }

.delete-btn { background-color: #dc3545; color: var(--button-text-color); }
.delete-btn:hover { background-color: #c82333; }

.save-btn { background-color: #28a745; color: var(--button-text-color); }
.save-btn:hover { background-color: #218838; }

.cancel-btn { background-color: #6c757d; color: var(--button-text-color); }
.cancel-btn:hover { background-color: #5a6268; }

/* Ensure all buttons use the same base color for text */
.message-item-control .message-buttons button {
    color: var(--button-text-color);
}

.edit-area {
    width: 100%;
    height: 100px;
}

/* Tabs */
.tabs-container {
    display: flex;
    flex-wrap: wrap;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 20px;
}

.tab {
    padding: 10px 20px;
    cursor: pointer;
    border: 1px solid transparent;
    border-bottom: 0;
    margin-bottom: -2px;
    position: relative;
    color: var(--link-color);
}

.tab.active {
    border-color: var(--border-color);
    border-bottom-color: var(--container-bg);
    background-color: var(--container-bg);
    border-radius: 4px 4px 0 0;
    color: var(--text-color);
    font-weight: bold;
}

.tab:not(.active):hover {
    background-color: var(--bg-color);
    border-radius: 4px 4px 0 0;
}

.add-category-tab {
    border-style: dashed;
    color: var(--link-color);
    min-height: 42px; /* Match height of other tabs */
    box-sizing: border-box;
}

.add-category-tab:hover {
    background-color: var(--bg-color);
}

.add-category-plus {
    font-size: 1.5em;
    font-weight: bold;
    line-height: 1;
}

.add-category-form {
    display: flex;
    gap: 5px;
    align-items: center;
}

.add-category-inline-btn {
    padding: 5px 10px;
    font-size: 0.9em;
    white-space: nowrap; /* Prevent button text from wrapping */
}

.delete-category-btn {
    margin-left: 8px;
    color: #dc3545;
    font-weight: bold;
    cursor: pointer;
    font-size: 14px;
    padding: 0 5px;
    border-radius: 50%;
}

.delete-category-btn:hover {
    background-color: #f8d7da;
}

/* Styles for inline category editing */
.tab {
    display: flex;
    align-items: center;
    gap: 5px;
}

.category-name {
    cursor: pointer;
}

.edit-category-input,
.new-category-inline-input {
    padding: 2px 4px;
    font-size: 1em;
    border: 1px solid var(--link-color);
    border-radius: 3px;
    background-color: var(--bg-color);
    color: var(--text-color);
    max-width: 120px; /* Adjust as needed */
}

/* Footer Styles */
footer {
    text-align: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color-light);
    font-size: 0.9em;
    color: #6c757d;
}

footer a {
    color: var(--link-color);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Sidebar Ads */
.ads-left, .ads-right {
  position: fixed;
  top: 100px;
  width: 160px;
  height: 600px;
  z-index: 999;
}
.ads-left {
  left: 0;
}
.ads-right {
  right: 0;
}

/* 在行動裝置或較小螢幕上隱藏側邊廣告 */
@media (max-width: 1200px) {
  .ads-left, .ads-right {
    display: none;
  }
}