:root {
    --bg-dark: #0f172a;
    --sidebar-bg: #1e293b;
    --panel-bg: rgba(30, 41, 59, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-blue: #3b82f6;
    --accent-blue-hover: #2563eb;
    --accent-purple: #8b5cf6;
    --accent-purple-hover: #7c3aed;
    --success: #10b981;
}

body, html {
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

.shell-container {
    display: flex;
    height: 100vh;
}

.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.brand {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-icon {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border-radius: 6px;
}

.brand h2 {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
}

.folder-tree-section {
    padding: 20px 0;
    flex: 1;
    overflow-y: auto;
}

.folder-tree-section h3 {
    padding: 0 20px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.folder-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.folder-item {
    padding: 10px 20px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-left: 3px solid transparent;
    transition: all 0.2s;
}

.folder-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.folder-item.active {
    background-color: rgba(59, 130, 246, 0.1);
    border-left-color: var(--accent-blue);
    color: var(--accent-blue);
}

.content-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 32px 48px;
    overflow-y: auto;
}

.top-nav {
    margin-bottom: 32px;
}

.top-nav h1 {
    margin: 0 0 8px 0;
    font-size: 24px;
    font-weight: 600;
}

.path-badge {
    background: rgba(255, 255, 255, 0.05);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 12px;
    color: var(--text-secondary);
    font-family: monospace;
    border: 1px solid var(--border-color);
}

.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.panel-section h3 {
    margin: 0 0 8px 0;
    font-size: 16px;
    font-weight: 500;
}

.subtitle {
    margin: 0 0 16px 0;
    font-size: 13px;
    color: var(--text-secondary);
}

.extension-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.ext-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
}

.ext-badge:hover {
    border-color: rgba(255, 255, 255, 0.3);
}

.ext-badge input {
    accent-color: var(--accent-blue);
    cursor: pointer;
}

.button-group {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

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

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}
.btn-outline:hover { background-color: rgba(255,255,255,0.05); }

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

.terminal-log {
    background: #000;
    border-radius: 6px;
    padding: 16px;
    font-family: monospace;
    font-size: 12px;
    color: #10b981;
    min-height: 80px;
    max-height: 200px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
}

.empty-state {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;
    color: var(--text-secondary);
    border: 1px dashed var(--border-color);
    border-radius: 12px;
}