:root {
    --bg-color: #1e1e2e;
    --toolbar-bg: #252538;
    --border-color: #383852;
    --text-color: #cdd6f4;
    --accent-color: #89b4fa;
    --accent-hover: #b4befe;
}

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

body {
    font-family: system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Toolbar */
.toolbar {
    background-color: var(--toolbar-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: center;
    justify-content: space-between;
}

.toolbar-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.toolbar input[type="text"] {
    background: #11111b;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 6px 10px;
    border-radius: 4px;
    width: 250px;
}

button {
    background-color: var(--accent-color);
    color: #11111b;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

.preset-btn {
    background-color: #313244;
    color: var(--text-color);
}

.preset-btn:hover {
    background-color: #45475a;
}

.slider-group input[type="range"] {
    accent-color: var(--accent-color);
    cursor: ew-resize;
}

/* Main Container */
.main-container {
    flex: 1;
    display: flex;
    position: relative;
    overflow: hidden;
}

.viewport-wrapper {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #11111b;
    padding: 20px;
    overflow: auto;
}

.viewport-frame-container {
    position: relative;
    height: 80vh;
    max-height: 900px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    display: flex;
    flex-direction: column;
    transition: width 0.1s ease-out;
}

iframe {
    width: 100%;
    height: 100%;
    border: none;
    border-radius: 8px;
}

/* Notes Sidebar */
.notes-sidebar {
    width: 300px;
    background-color: var(--toolbar-bg);
    border-left: 1px solid var(--border-color);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: transform 0.3s ease;
}

.notes-sidebar.hidden {
    transform: translateX(100%);
    position: absolute;
    right: 0;
    height: 100%;
}

.notes-sidebar textarea {
    flex: 1;
    background: #11111b;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 10px;
    border-radius: 4px;
    resize: none;
    font-family: inherit;
}