:root {
    --bg-dark: #1e1e1e;
    --bg-panel: #252526;
    --bg-header: #333333;
    --accent: #007acc;
    --accent-hover: #0098ff;
    --text-main: #cccccc;
    --text-bright: #ffffff;
    --border: #3e3e42;
}

* {
    box-sizing: border-box;
    user-select: none;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
}

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

/* Toolbar */
.toolbar {
    height: 50px;
    background-color: var(--bg-header);
    display: flex;
    align-items: center;
    padding: 0 15px;
    border-bottom: 1px solid var(--border);
    justify-content: space-between;
}

.logo {
    font-size: 18px;
    font-weight: bold;
    color: var(--text-bright);
}

.logo i {
    color: var(--accent);
    margin-left: 5px;
}

.controls {
    display: flex;
    gap: 10px;
}

/* Buttons */
.btn {
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
    color: white;
    transition: opacity 0.2s;
    display: flex;
    align-items: center;
    gap: 5px;
}

.btn:hover { opacity: 0.9; }
.btn-success { background-color: #28a745; }
.btn-danger { background-color: #dc3545; }
.btn-warning { background-color: #ffc107; color: #000; }
.btn-info { background-color: #17a2b8; }
.btn-info.active { background-color: #138496; box-shadow: inset 0 3px 5px rgba(0,0,0,0.125); }
.btn-primary { background-color: var(--accent); }
.btn-sm { padding: 4px 8px; font-size: 12px; }

.btn-group {
    display: flex;
    gap: 5px;
}

/* Speed Control */
.speed-control {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.1);
    padding: 4px 10px;
    border-radius: 4px;
}

.speed-label {
    font-size: 12px;
    color: var(--text-main);
    min-width: 80px;
    text-align: center;
}

.speed-control .btn-sm {
    background: var(--accent);
    padding: 4px 8px;
}

.btn-separator {
    width: 1px;
    height: 24px;
    background-color: var(--border);
    margin: 0 5px;
}

/* Main Content Area */
.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Sidebars */
.sidebar {
    width: 250px;
    background-color: var(--bg-panel);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.right-sidebar {
    border-right: none;
    border-left: 1px solid var(--border);
    width: 300px;
}

.sidebar-header {
    padding: 10px;
    background-color: #2d2d2d;
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border);
}

/* Toolbox */
.toolbox-items {
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toolbox-btn {
    background: #333;
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 10px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: background 0.2s;
}

.toolbox-btn:hover {
    background: #444;
}

.shape {
    width: 30px;
    height: 20px;
    border: 2px solid var(--text-main);
}

.shape-start { border-radius: 10px; }
.shape-process { border-radius: 0; }
.shape-io { transform: skewX(-20deg); margin: 0 5px; }
.shape-decision { width: 20px; height: 20px; transform: rotate(45deg); margin: 0 5px; }
.shape-connector { border-radius: 50%; width: 22px; height: 22px; }


/* Canvas Area */
.canvas-area {
    flex: 1;
    background-color: #eebb99; 
    background-color: #f0f0f0;
    position: relative;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: radial-gradient(#ccc 1px, transparent 1px);
    background-size: 20px 20px;
}

/* P5 Canvas styling */
canvas {
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
}

/* Properties & Console */
.panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    border-bottom: 1px solid var(--border);
}

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

.panel-content {
    padding: 15px;
    flex: 1;
    overflow-y: auto;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-size: 12px;
}

.form-group input {
    width: 100%;
    padding: 6px;
    border: 1px solid var(--border);
    background: #333;
    color: white;
    border-radius: 3px;
}

.no-selection {
    color: #666;
    font-style: italic;
    text-align: center;
    margin-top: 20px;
}

/* Console */
.console-panel {
    height: 40%;
    flex: none;
    background-color: #1e1e1e;
    position: relative;
}

.console-output {
    flex: 1;
    padding: 10px;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 12px;
    overflow-y: auto;
    color: #4af626;
    height: calc(100% - 35px);
}

.console-line {
    margin-bottom: 4px;
    border-bottom: 1px solid #333;
    padding-bottom: 2px;
}

.system { color: #888; }
.error { color: #ff5555; }
.output { color: #ffffff; }

.btn-clear-console {
    position: absolute;
    top: 5px;
    right: 5px;
    background: none;
    border: 1px solid #444;
    color: #888;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 3px;
    cursor: pointer;
}

.btn-clear-console:hover { color: white; border-color: white; }

.tab-btn {
    flex: 1;
    background: #333;
    border: none;
    color: #aaa;
    padding: 5px;
    cursor: pointer;
    font-size: 11px;
    border-right: 1px solid #444;
}
.tab-btn.active {
    background: #1e1e1e;
    color: white;
    font-weight: bold;
}
.tab-btn:hover {
    background: #3a3a3a;
}