:root {
    --bg-color: #f1f5f9;
    --panel-bg: #ffffff;
    --accent-primary: #0284c7;
    --accent-secondary: #0ea5e9;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --danger: #ef4444;
    --success: #22c55e;
    --warning: #f59e0b;
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.5;
    overflow: hidden;
}

.app-container {
    display: grid;
    grid-template-columns: 350px 1fr 320px;
    height: 100vh;
    gap: 1rem;
    padding: 1rem;
}

/* Panels */
.panel {
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.panel-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    font-weight: 700;
    background: #f8fafc;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-content {
    padding: 1.25rem;
    overflow-y: auto;
    flex: 1;
}

h3 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.divider {
    border: 0;
    border-top: 1px solid var(--border-color);
    margin: 1.25rem 0;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.375rem;
}

input,
select {
    width: 100%;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    padding: 0.5rem 0.75rem;
    color: var(--text-primary);
    font-size: 0.875rem;
    outline: none;
    transition: all 0.2s;
}

input:focus,
select:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.1);
}

/* Buttons */
.btn {
    cursor: pointer;
    padding: 0.625rem 1rem;
    border-radius: 0.375rem;
    border: 1px solid transparent;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

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

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

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

.btn-outline:hover {
    background: #f8fafc;
}

/* Viewport */
.viewport {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.canvas-container {
    flex: 1;
    background: #ffffff;
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.view-badge {
    position: absolute;
    top: 1rem;
    left: 1.25rem;
    pointer-events: none;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.9);
    padding: 4px 10px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    font-weight: 700;
    font-size: 0.75rem;
}

.viewport-controls {
    display: flex;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--panel-bg);
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.stat-card {
    background: #f8fafc;
    padding: 0.75rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--accent-primary);
}

.stat-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.cog-display {
    display: flex;
    justify-content: space-between;
    margin-top: 0.5rem;
    font-size: 0.875rem;
}

/* Item List */
.item-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.item-card {
    background: #ffffff;
    padding: 0.875rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
    transition: all 0.2s;
}

.item-card:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.item-info h4 {
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--text-primary);
}

.item-info p {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Warnings */
.warning-box {
    background: #fffbeb;
    border: 1px solid #fcd34d;
    color: #92400e;
    padding: 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.8125rem;
    margin-top: 1rem;
    display: none;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 10px;
}