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

:root {
    --primary-color: #4a90d9;
    --primary-hover: #357abd;
    --bg-color: #1e1e1e;
    --bg-secondary: #252526;
    --bg-tertiary: #2d2d30;
    --text-color: #cccccc;
    --text-secondary: #858585;
    --border-color: #3c3c3c;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --error-color: #f44336;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow: hidden;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Header */
#header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    height: 48px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
    font-weight: 600;
}

.logo-icon {
    font-size: 24px;
}

.nav-buttons {
    display: flex;
    gap: 8px;
}

.btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-tertiary);
    color: var(--text-color);
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s;
}

.btn:hover {
    background-color: var(--border-color);
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

.btn-small {
    padding: 4px 8px;
    border: none;
    background: transparent;
    color: var(--text-color);
    cursor: pointer;
    font-size: 12px;
}

/* Main */
#main {
    display: flex;
    flex: 1;
    overflow: hidden;
}

#blockly-area {
    flex: 1;
    position: relative;
}

#blockly-div {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

/* Code Panel */
#code-panel {
    width: 350px;
    background-color: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: width 0.3s, min-width 0.3s;
}

#code-panel.collapsed {
    width: 40px;
    min-width: 40px;
}

#code-panel.collapsed .panel-content {
    display: none;
}

#code-panel.collapsed .panel-header span {
    display: none;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background-color: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    font-size: 13px;
    font-weight: 500;
}

.panel-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding: 12px;
}

#code-output {
    flex: 1;
    overflow: auto;
    background-color: var(--bg-color);
    border-radius: 4px;
    padding: 12px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 12px;
    line-height: 1.5;
    margin-bottom: 12px;
}

#code-output code {
    white-space: pre-wrap;
    word-break: break-all;
}

#btn-copy-code {
    align-self: flex-end;
}

/* Footer */
#footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 16px;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    font-size: 12px;
    color: var(--text-secondary);
    height: 24px;
}

/* Blockly Customization */
.blocklyToolboxDiv {
    background-color: var(--bg-secondary) !important;
}

.blocklyTreeRow {
    padding: 4px 8px !important;
}

.blocklyTreeLabel {
    color: var(--text-color) !important;
}

.blocklyFlyoutBackground {
    fill: var(--bg-tertiary) !important;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Syntax Highlighting */
.code-keyword { color: #569cd6; }
.code-string { color: #ce9178; }
.code-number { color: #b5cea8; }
.code-comment { color: #6a9955; }
.code-function { color: #dcdcaa; }