:root {
            --bg-color: #18181B; /* zinc-900 */
            --surface-color: #27272A; /* zinc-800 */
            --primary-color: #22C55E; /* green-500 */
            --primary-hover: #16A34A; /* green-600 */
            --text-primary: #F4F4F5; /* zinc-100 */
            --text-secondary: #A1A1AA; /* zinc-400 */
            --border-color: #3F3F46; /* zinc-700 */
            --status-height: 32px;
            --nav-height: 65px;
        }
        body { 
            font-family: 'Inter', sans-serif; 
            background-color: var(--bg-color); 
            color: var(--text-secondary); 
            padding-top: var(--status-height);
            padding-bottom: var(--nav-height);
        }
        /* Layout & Typography */
        #app-container {
            width: 100%;
            height: calc(100vh - var(--status-height) - var(--nav-height));
            overflow-y: auto;
            padding: 2rem 1.5rem;
        }
        .content-panel {
            max-width: 1152px;
            margin: 0 auto;
            animation: fadeIn 0.5s ease-in-out;
        }
        .section-title { text-align: center; margin-bottom: 3rem; }
        .section-title h2 { font-size: 2.5rem; font-weight: 700; color: var(--text-primary); }
        .section-title p { color: var(--primary-color); font-family: 'Roboto Mono', monospace; }
        #industry-content-display h4 { font-weight: bold; color: var(--primary-color); margin-bottom: 0.5rem; }
        #industry-content-display p { margin-bottom: 1rem; color: var(--text-secondary); }
        #industry-content-display p:last-child { margin-bottom: 0; }
        
        /* Status Bar */
        #status-bar {
            position: fixed; top: 0; left: 0; right: 0;
            height: var(--status-height);
            background-color: #09090B; /* zinc-950 */
            z-index: 40; display: flex; align-items: center; justify-content: center;
            overflow: hidden; border-bottom: 1px solid var(--border-color);
            font-family: 'Roboto Mono', monospace;
            font-size: 0.8rem;
            color: var(--text-secondary);
        }

        /* Bottom Navigation */
        #bottom-nav {
            position: fixed; bottom: 0; left: 0; right: 0;
            height: var(--nav-height);
            background-color: rgba(24, 24, 27, 0.8); /* zinc-900 with opacity */
            backdrop-filter: blur(8px);
            border-top: 1px solid var(--border-color);
            display: flex; justify-content: space-around; align-items: center;
            z-index: 40;
        }
        .nav-item {
            display: flex; flex-direction: column; align-items: center; justify-content: center;
            color: var(--text-secondary);
            background: none; border: none; cursor: pointer;
            transition: all 0.3s ease;
            padding: 0.5rem; border-radius: 8px; flex-grow: 1; max-width: 100px;
        }
        .nav-item.active, .nav-item:hover { color: var(--primary-color); }
        .nav-item.active { background-color: rgba(39, 39, 42, 0.7); }

        /* Expertise Screen */
        .industry-btn {
            width: 100%; text-align: left; padding: 0.75rem 1rem; border-radius: 0.5rem;
            font-weight: 600; color: var(--text-secondary);
            transition: all 0.2s ease-in-out;
        }
        .industry-btn:hover { background-color: var(--surface-color); color: var(--text-primary); }
        .industry-btn.active { background-color: var(--primary-color); color: white; }
        
        /* Modal */
        #modal-backdrop { background-color: rgba(0,0,0,0.7); backdrop-filter: blur(4px); }
        #modal-content { transition: transform 0.3s ease-out, opacity 0.3s ease-out; transform: scale(0.95); opacity: 0; }
        #modal.active #modal-content { transform: scale(1); opacity: 1; }

        /* Animations */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .animate-fade-in-up {
            animation: fadeIn 0.8s ease-out 0.2s both;
        }
        
        /* Mobile Responsiveness */
        @media (max-width: 768px) {
            body { --nav-height: 60px; }
            #app-container { padding: 1.5rem 1rem; }
            .section-title h2 { font-size: 2rem; }
            .content-panel h1.text-4xl { font-size: 2.25rem; line-height: 2.5rem; }
        }