* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'MS Sans Serif', Tahoma, sans-serif;
    height: 100vh;
    overflow: hidden;
    background: #c0c0c0;
    display: flex;
    flex-direction: column;
}

.header {
    background: #c0c0c0;
    border-bottom: 2px solid #808080;
    padding: 6px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 36px;
    flex-shrink: 0;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-icon {
    font-size: 20px;
}

.header-title {
    font-size: 14px;
    font-weight: bold;
    color: #000000;
}

.header-links {
    display: flex;
    gap: 16px;
}

.header-link {
    font-size: 12px;
    color: #000000;
    text-decoration: underline;
    cursor: pointer;
}

.header-link:hover {
    background: #316ac5;
    color: #ffffff;
}

.app-container {
    display: flex;
    height: calc(100vh - 36px);
    width: 100vw;
}

.toggle-strip {
    display: flex;
    flex-direction: column;
    background: #c0c0c0;
    width: 32px;
    border-right: 2px solid #808080;
}

.main-panels {
    display: flex;
    flex: 1;
    min-width: 0;
}

.panel {
    display: flex;
    flex-direction: column;
    border-right: 2px solid #808080;
    background: #c0c0c0;
    min-width: 200px;
}

.panel:last-child {
    border-right: none;
}

.resize-handle {
    width: 4px;
    background: #808080;
    cursor: col-resize;
    flex-shrink: 0;
    position: relative;
    border-left: 1px solid #a0a0a0;
    border-right: 1px solid #606060;
}

.resize-handle:hover {
    background: #606060;
}

.resize-handle.dragging {
    background: #316ac5;
}

.panel-header {
    padding: 8px 12px;
    background: #c0c0c0;
    border-bottom: 2px solid #808080;
    font-weight: normal;
    font-size: 12px;
    color: #000000;
}

.panel-content {
    flex: 1;
    padding: 8px;
    overflow: auto;
    background: #ffffff;
    border: 1px inset #c0c0c0;
}

/* Panel sizing */
.snippet-panel {
    width: 25%;
    flex: 0 1 auto;
}

.editor-panel {
    width: 50%;
    flex: 0 1 auto;
}

.preview-panel {
    width: 25%;
    flex: 0 1 auto;
}

/* Toggle buttons */
.toggle-btn {
    background: #c0c0c0;
    border: 2px outset #c0c0c0;
    color: #000000;
    padding: 6px;
    cursor: pointer;
    font-size: 16px;
    height: 32px;
    width: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toggle-btn:hover {
    background: #d4d0c8;
}

.toggle-btn:active {
    border: 2px inset #c0c0c0;
}

.toggle-btn.active {
    background: #d4d0c8;
    border: 2px inset #c0c0c0;
}

/* Placeholder content styling */
.placeholder {
    color: #808080;
    font-style: italic;
    text-align: center;
    margin-top: 40px;
    font-size: 12px;
}

.snippet-list {
    list-style: none;
}

.snippet-item {
    padding: 4px 8px;
    border: 1px solid #808080;
    margin-bottom: 2px;
    cursor: pointer;
    background: #ffffff;
}

.snippet-item:hover {
    background: #316ac5;
    color: #ffffff;
}

.snippet-item.selected {
    background: #316ac5;
    color: #ffffff;
}

.snippet-name {
    font-weight: normal;
    font-size: 12px;
}

.snippet-date {
    font-size: 11px;
    color: inherit;
    margin-top: 1px;
}

.editor-placeholder {
    background: #ffffff;
    border: 2px inset #c0c0c0;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    margin: 8px;
}

.preview-placeholder {
    background: #ffffff;
    border: 2px inset #c0c0c0;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    margin: 8px;
}