/* Base Styles */
* {
    box-sizing: border-box;
}

body, html {
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background: #f3f3f3; /* Application background */
    color: #333;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

#app {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Explorer Sidebar */
#explorer {
    width: 320px;
    background: #f8f9fa;
    border-right: 1px solid #ddd;
    display: flex;
    flex-direction: column;
    height: 100%;
    flex-shrink: 0;
    z-index: 10;
}

#explorer-fixed {
    border-bottom: 1px solid #ddd;
    background: #f8f9fa;
}

#explorer-scrollable {
    flex: 1;
    overflow-y: auto;
}

header {
    background: #e9ecef;
    color: #495057;
    padding: 10px 15px;
    font-size: 11px;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
    border-bottom: 1px solid #dee2e6;
    user-select: none;
}

/* Hardware Tree Navigation */
#hardware-tree ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

#hardware-tree li {
    padding: 10px 20px;
    cursor: pointer;
    border-bottom: 1px solid #eee;
    font-size: 13px;
    transition: all 0.2s;
    color: #495057;
}

#hardware-tree li:hover {
    background: #e9ecef;
    color: #000;
}

#hardware-tree li.active {
    background: #007acc;
    color: #fff;
    border-left: 3px solid #005a9e;
    padding-left: 17px;
}

/* Stage & Paper Area (The Workspace) */
#stage {
    flex: 1;
    position: relative;
    overflow: auto; /* Allow scrolling if canvas is large */
    background: #d1d4d7; /* Distinct "desk" background */
    padding: 40px; /* Padding around the "paper" */
    display: flex;
    justify-content: center;
    align-items: center;
}

/* The actual Canvas "Paper" */
#paper {
    background: #ffffff;
    box-shadow: 0 4px 15px rgba(0,0,0,0.15), 0 1px 3px rgba(0,0,0,0.1);
    border: 1px solid #bbb;
    min-width: 800px;
    min-height: 600px;
    cursor: grab;
}

#paper:active {
    cursor: grabbing;
}

/* Controls & Buttons */
.control-panel {
    border-bottom: 1px solid #ddd;
    padding: 15px;
}

.btn-group {
    display: flex;
    gap: 8px;
    margin-bottom: 10px;
}

button {
    background: #007acc;
    color: white;
    border: none;
    padding: 8px 12px;
    cursor: pointer;
    font-size: 13px;
    border-radius: 4px;
    transition: background 0.2s, transform 0.1s;
}

button:hover {
    background: #005a9e;
}

button:active {
    transform: translateY(1px);
}

/* Code Editor */
#asm-input {
    width: 100%;
    background: #fff;
    color: #212529;
    border: 1px solid #ced4da;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 13px;
    padding: 8px;
    outline: none;
}

#asm-input:focus {
    border-color: #007acc;
    box-shadow: 0 0 0 0.2rem rgba(0,122,204,0.25);
}

/* Circuit Info Box */
#circuit-info {
    margin: 15px;
    padding: 15px;
    background: #ffffff;
    border-radius: 4px;
    border-left: 4px solid #007acc;
    font-size: 13px;
    color: #495057;
    line-height: 1.6;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

#circuit-info b {
    color: #212529;
    font-size: 14px;
}

/* Monitor Table */
.monitor {
    margin-top: auto;
    border-top: 1px solid #dee2e6;
    background: #fff;
}

#reg-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
}

#reg-table th {
    background: #f8f9fa;
    color: #6c757d;
    padding: 10px;
    border-bottom: 2px solid #dee2e6;
    text-align: left;
}

#reg-table td {
    padding: 10px;
    border-bottom: 1px solid #eee;
    color: #2c3e50;
    font-family: monospace;
}

/* Breadcrumb Navigation */
#breadcrumb-nav {
    list-style: none;
    padding: 15px;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 11px;
}

#breadcrumb-nav li {
    background: #e9ecef;
    padding: 4px 8px;
    border-radius: 4px;
    cursor: pointer;
    color: #495057;
}

#breadcrumb-nav li:hover {
    background: #dee2e6;
}

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #bbb;
}

/* JointJS Element Styles Overrides */
.joint-paper {
    background-color: #ffffff !important;
}