* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        :root {
            --primary: #e74c3c;
            --primary-dark: #c0392b;
            --secondary: #f39c12;
            --bg: #fafafa;
            --card-bg: #ffffff;
            --text: #2c3e50;
            --text-light: #7f8c8d;
            --border: #ecf0f1;
            --shadow: 0 2px 12px rgba(0,0,0,0.08);
            --shadow-hover: 0 8px 24px rgba(0,0,0,0.12);
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            min-height: 100vh;
        }
        
        /* Header */
        header {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            padding: 3rem 1rem 4rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        header::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
            background-size: 20px 20px;
            opacity: 0.3;
        }
        
        .logo {
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: 0.5rem;
            position: relative;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .logo-icon {
            width: 48px;
            height: 48px;
            background: white;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.8rem;
        }
        
        .tagline {
            font-size: 1.1rem;
            opacity: 0.95;
            font-weight: 300;
            position: relative;
        }
        
        /* Navigation Tabs */
        .nav-tabs {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin-top: 2rem;
            position: relative;
            flex-wrap: wrap;
            padding: 0 1rem;
        }
        
        .tab-btn {
            background: rgba(255,255,255,0.2);
            border: 2px solid rgba(255,255,255,0.3);
            color: white;
            padding: 0.8rem 2rem;
            border-radius: 50px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: all 0.3s ease;
            backdrop-filter: blur(10px);
        }
        
        .tab-btn:hover, .tab-btn.active {
            background: white;
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0,0,0,0.2);
        }
        
        /* Main Container */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem 1rem;
        }
        
        /* Info Cards */
        .info-section {
            display: none;
            animation: fadeIn 0.5s ease;
        }
        
        .info-section.active {
            display: block;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .section-header {
            text-align: center;
            margin-bottom: 2.5rem;
        }
        
        .section-header h2 {
            font-size: 1.8rem;
            color: var(--text);
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }
        
        .section-header p {
            color: var(--text-light);
            font-size: 1rem;
        }
        
        .badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
        }
        
        .badge-supply {
            background: #e8f5e9;
            color: #2e7d32;
        }
        
        .badge-demand {
            background: #fff3e0;
            color: #ef6c00;
        }
        
        /* Cards Grid */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 1.5rem;
        }
        
        @media (max-width: 768px) {
            .cards-grid {
                grid-template-columns: 1fr;
            }
        }
        
        .card {
            background: var(--card-bg);
            border-radius: 16px;
            padding: 1.5rem;
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
            border: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }
        
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        
        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--primary);
        }
        
        .card.supply::before {
            background: #27ae60;
        }
        
        .card.demand::before {
            background: var(--secondary);
        }
        
        .card-header {
            display: flex;
            justify-content: space-between;
            align-items: start;
            margin-bottom: 1rem;
        }
        
        .card-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.25rem;
        }
        
        .card-subtitle {
            font-size: 0.875rem;
            color: var(--text-light);
        }
        
        .card-body {
            margin-bottom: 1rem;
        }
        
        .info-row {
            display: flex;
            margin-bottom: 0.75rem;
            font-size: 0.95rem;
        }
        
        .info-label {
            font-weight: 600;
            color: var(--text-light);
            min-width: 80px;
            flex-shrink: 0;
        }
        
        .info-value {
            color: var(--text);
            flex: 1;
        }
        
        .highlight {
            background: linear-gradient(120deg, #ffeaa7 0%, #ffeaa7 100%);
            background-repeat: no-repeat;
            background-size: 100% 40%;
            background-position: 0 88%;
            padding: 0 4px;
            font-weight: 600;
        }
        
        .contact-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--primary);
            color: white;
            padding: 0.6rem 1.2rem;
            border-radius: 8px;
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 600;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            width: 100%;
            justify-content: center;
            margin-top: 0.5rem;
        }
        
        .contact-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
        }
        
        .proof-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            background: #e3f2fd;
            color: #1976d2;
            padding: 0.25rem 0.5rem;
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-top: 0.5rem;
        }
        
        /* Submit Section */
        .submit-section {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border-radius: 20px;
            padding: 3rem 2rem;
            margin: 3rem auto;
            max-width: 800px;
            text-align: center;
            color: white;
            position: relative;
            overflow: hidden;
        }
        
        .submit-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
        }
        
        .submit-section h3 {
            font-size: 1.8rem;
            margin-bottom: 1rem;
            position: relative;
        }
        
        .submit-section p {
            opacity: 0.9;
            margin-bottom: 1.5rem;
            position: relative;
        }
        
        .email-box {
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(10px);
            border: 2px solid rgba(255,255,255,0.3);
            border-radius: 12px;
            padding: 1rem 2rem;
            display: inline-flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 1.2rem;
            font-weight: 600;
            font-family: 'Courier New', monospace;
            position: relative;
            word-break: break-all;
        }
        
        .copy-btn {
            background: white;
            color: #667eea;
            border: none;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all 0.3s ease;
        }
        
        .copy-btn:hover {
            transform: scale(1.05);
            box-shadow: 0 4px 12px rgba(0,0,0,0.2);
        }
        
        .requirements {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin-top: 2rem;
            text-align: left;
        }
        
        .req-card {
            background: rgba(255,255,255,0.1);
            backdrop-filter: blur(10px);
            border-radius: 12px;
            padding: 1.5rem;
            border: 1px solid rgba(255,255,255,0.2);
        }
        
        .req-card h4 {
            font-size: 1.1rem;
            margin-bottom: 0.75rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .req-card ul {
            list-style: none;
            font-size: 0.9rem;
            opacity: 0.9;
        }
        
        .req-card li {
            padding: 0.25rem 0;
            padding-left: 1.2rem;
            position: relative;
        }
        
        .req-card li::before {
            content: '✓';
            position: absolute;
            left: 0;
            opacity: 0.8;
        }
        
        /* Footer */
        footer {
            text-align: center;
            padding: 2rem;
            color: var(--text-light);
            font-size: 0.9rem;
            border-top: 1px solid var(--border);
            margin-top: 2rem;
        }
        
        /* Toast Notification */
        .toast {
            position: fixed;
            bottom: 2rem;
            left: 50%;
            transform: translateX(-50%) translateY(100px);
            background: #2c3e50;
            color: white;
            padding: 1rem 2rem;
            border-radius: 50px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.3);
            opacity: 0;
            transition: all 0.3s ease;
            z-index: 1000;
            font-weight: 500;
        }
        
        .toast.show {
            opacity: 1;
            transform: translateX(-50%) translateY(0);
        }
        
        /* Empty State */
        .empty-state {
            text-align: center;
            padding: 4rem 2rem;
            color: var(--text-light);
        }
        
        .empty-icon {
            font-size: 4rem;
            margin-bottom: 1rem;
            opacity: 0.5;
        }
        
        /* Responsive */
        @media (max-width: 640px) {
            .logo {
                font-size: 1.8rem;
            }
            
            .logo-icon {
                width: 40px;
                height: 40px;
                font-size: 1.4rem;
            }
            
            .tab-btn {
                padding: 0.6rem 1.5rem;
                font-size: 0.9rem;
            }
            
            .cards-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            
            .submit-section {
                padding: 2rem 1rem;
                margin: 2rem 1rem;
            }
            
            .email-box {
                font-size: 1rem;
                padding: 0.75rem 1rem;
                flex-direction: column;
                gap: 0.5rem;
            }
        }
        
        /* Schema.org structured data helper */
        .structured-data {
            display: none;
        }