body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    height: 100vh;
    overflow: hidden;
    color: #333;
}

.app-container {
    display: flex;
    height: 100%;
}

/* Sidebar Styles */
.sidebar {
    width: 280px;
    background-color: #f5f5f5;
    border-right: 1px solid #d1d1d1;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 15px;
    background-color: #f5f5f5;
    border-bottom: 1px solid #e1e1e1;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.app-brand {
    font-size: 1.3rem;
    font-weight: 700;
    color: #333;
    display: flex;
    align-items: center;
    gap: 10px;
}

#add-note-btn {
    width: 100%;
    padding: 10px;
    background-color: #ffcc00; /* Yellow */
    color: #333;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

#add-note-btn:hover {
    background-color: #e6b800;
}

#search-notes {
    padding: 8px;
    border: 1px solid #ccc;
    background-color: #fff;
    border-radius: 4px;
    outline: none;
}

.notes-list {
    flex: 1;
    overflow-y: auto;
}

.note-item {
    padding: 12px 15px;
    cursor: pointer;
    border-bottom: 1px solid #e1e1e1;
    font-size: 0.95rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    transition: background-color 0.2s;
}

.note-item:hover {
    background-color: #eaeaea;
}

.note-item.active {
    background-color: #fff;
    border-left: 4px solid #ffcc00;
    font-weight: 600;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.note-info {
    flex: 1;
    overflow: hidden;
}

.note-title-preview {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-weight: 500;
    margin-bottom: 4px;
}

.note-date {
    font-size: 0.75rem;
    color: #888;
    font-weight: normal;
}

.delete-note-btn {
    background: none;
    border: none;
    color: #999;
    cursor: pointer;
    font-size: 0.9rem;
    line-height: 1;
    padding: 0 0 0 10px;
    transition: color 0.2s;
}

.delete-note-btn:hover {
    color: #d00;
}

/* Editor Styles */
.editor-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 40px;
    background-color: white;
}

#note-title {
    font-size: 2.5rem;
    border: none;
    outline: none;
    margin-bottom: 20px;
    font-weight: bold;
    color: #2d2d2d;
    border-bottom: 1px solid transparent;
}

#note-title:focus {
    border-bottom: 1px solid #e1e1e1;
}

/* Toolbar Styles */
.toolbar {
    margin-bottom: 15px;
    display: flex;
    gap: 5px;
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 10px;
    flex-wrap: wrap;
    align-items: center;
}

.toolbar select {
    padding: 2px 5px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background: #f9f9f9;
    cursor: pointer;
    font-size: 0.9rem;
    height: 30px;
    color: #333;
}

.toolbar button {
    background: #f9f9f9;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
    padding: 5px 10px;
    font-size: 0.95rem;
    min-width: 32px;
    height: 32px;
    color: #333;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toolbar button:hover {
    background-color: #e0e0e0;
}

.color-wrapper {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 32px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background: #f9f9f9;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.color-wrapper:hover {
    background-color: #e0e0e0;
}

.color-wrapper input[type="color"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    padding: 0;
    border: none;
}

.separator {
    width: 1px;
    background-color: #ddd;
    height: 20px;
    margin: 0 5px;
}

.note-body {
    flex: 1;
    outline: none;
    font-size: 1.1rem;
    line-height: 1.6;
    overflow-y: auto;
}

/* Placeholder logic for contenteditable */
.note-body:empty:before {
    content: attr(placeholder);
    color: #aaa;
    display: block; /* For Firefox */
}

.note-body a {
    cursor: pointer;
}

.note-body img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 10px 0;
}

#resize-handle {
    position: absolute;
    width: 12px;
    height: 12px;
    background-color: #ffcc00;
    border: 2px solid white;
    box-shadow: 0 0 4px rgba(0,0,0,0.3);
    cursor: nwse-resize;
    display: none;
    z-index: 1000;
}

.note-body img.selected {
    outline: 3px solid #ffcc00;
    box-shadow: 0 0 10px rgba(255, 204, 0, 0.3);
}

/* Drag and Drop Styles */
.note-item[draggable="true"] {
    cursor: grab;
}

.note-item.dragging {
    opacity: 0.5;
}

.note-item.drag-over {
    border-top: 2px solid #ffcc00;
}