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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            color: #1a1a1a;
            line-height: 1.6;
        }

        /* Navbar */
        nav {
            background: #fff;
            border-bottom: 1px solid #e5e5e5;
            padding: 1.2rem 0;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 4px rgba(0,0,0,0.04);
        }

        .nav-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: #0066cc;
            text-decoration: none;
        }

        .nav-links {
            display: flex;
            gap: 2.5rem;
            list-style: none;
        }

        .nav-links a {
            color: #4a4a4a;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
        }

        .nav-links a:hover {
            color: #0066cc;
        }

        .nav-links li {
            position: relative;
        }

        .dropdown {
            position: absolute;
            top: 100%;
            left: 0;
            background: white;
            min-width: 240px;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
            border-radius: 8px;
            padding: 0.8rem 0;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-10px);
            transition: opacity 0.3s, transform 0.3s, visibility 0.3s;
            margin-top: 0.5rem;
        }

        .nav-links li:hover .dropdown {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .dropdown a {
            display: block;
            padding: 0.8rem 1.5rem;
            color: #4a4a4a;
            font-size: 0.95rem;
        }

        .dropdown a:hover {
            background: #f8f9fa;
            color: #0066cc;
        }

        .nav-cta {
            background: #0066cc;
            color: white;
            padding: 0.6rem 1.5rem;
            border-radius: 6px;
            text-decoration: none;
            font-weight: 600;
            transition: background 0.3s;
        }

        .nav-cta:hover {
            background: #0052a3;
        }

        /* Hero Section */
        .hero {
            margin-top: 80px;
            background: url('charts.png') center/cover no-repeat;
            color: white;
            padding: 6rem 2rem;
            text-align: center;
        }

        .hero h1 {
            font-size: 3rem;
            margin-bottom: 1.5rem;
            font-weight: 700;
        }

        .hero p {
            font-size: 1.3rem;
            margin-bottom: 2.5rem;
            opacity: 0.95;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-cta {
            display: inline-block;
            background: white;
            color: #0066cc;
            padding: 1rem 2.5rem;
            border-radius: 6px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .hero-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 16px rgba(0,0,0,0.2);
        }

        /* Content Sections */
        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        .section {
            padding: 1rem 0;
        }

        .section-title {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            text-align: center;
            color: #1a1a1a;
        }

        .section-subtitle {
            text-align: center;
            color: #666;
            font-size: 1.2rem;
            margin-bottom: 4rem;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        /* Image Placeholder Grid */
        .grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 2rem;
            margin-bottom: 3rem;
        }

        .card {
            background: #f8f9fa;
            border-radius: 12px;
            overflow: hidden;
            transition: transform 0.3s, box-shadow 0.3s;
            border: 1px solid #e5e5e5;
        }

        .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 24px rgba(0,0,0,0.1);
        }

        .card-image {
            width: 100%;
            height: 250px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.8rem;
            font-weight: 600;
            text-shadow: #1a1a1a 2px 2px 6px;
            overflow: hidden;
            position: relative;
        }

        .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            top: 0;
            left: 0;
        }

        .card-image span {
            position: relative;
            z-index: 10;
        }

        .card-content {
            padding: 1.5rem;
        }

        .card-title {
            font-size: 1.4rem;
            margin-bottom: 0.8rem;
            color: #1a1a1a;
        }

        .card-description {
            color: #666;
            line-height: 1.6;
        }

        /* Large Feature Image */
        .feature-image {
            width: 100%;
            height: 500px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            background: url('heat.png') center/cover no-repeat;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            text-shadow: #1a1a15 2px 2px 6px;
            font-size: 1.5rem;
            font-weight: 600;
            margin: 3rem 0;
        }

        /* Stats Section */
        .stats {
            background: #f8f9fa;
            padding: 4rem 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 3rem;
            text-align: center;
        }

        .stat-number {
            font-size: 3rem;
            font-weight: 700;
            color: #0066cc;
            margin-bottom: 0.5rem;
        }

        .stat-label {
            color: #666;
            font-size: 1.1rem;
        }

        /* Footer */
        footer {
            background: #1a1a1a;
            color: white;
            padding: 4rem 0 2rem;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 3rem;
        }

        .footer-section h3 {
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }

        .footer-section ul {
            list-style: none;
        }

        .footer-section ul li {
            margin-bottom: 0.8rem;
        }

        .footer-section a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s;
        }

        .footer-section a:hover {
            color: #0066cc;
        }

        .footer-bottom {
            border-top: 1px solid #333;
            padding-top: 2rem;
            text-align: center;
            color: #999;
        }

        /* Login Page Styles */
        .login-section {
            min-height: calc(100vh - 200px);
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 2rem;
            background: linear-gradient(135deg, #0f1419 0%, #1a1f2e 100%);
        }

        .login-container {
            width: 100%;
            max-width: 400px;
        }

        .login-box {
            background: #1a1a1a;
            border: 1px solid #333;
            border-radius: 8px;
            padding: 2.5rem;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
        }

        .login-box h1 {
            margin: 0 0 0.5rem 0;
            font-size: 1.8rem;
            color: #fff;
            text-align: center;
        }

        .login-subtitle {
            text-align: center;
            color: #999;
            margin: 0 0 2rem 0;
            font-size: 0.95rem;
        }

        .login-form {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .form-group label {
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
        }

        .form-group input[type="email"],
        .form-group input[type="password"] {
            padding: 0.75rem 1rem;
            background: #252525;
            border: 1px solid #444;
            border-radius: 6px;
            color: #fff;
            font-size: 0.95rem;
            transition: border-color 0.3s;
        }

        .form-group input[type="email"]:focus,
        .form-group input[type="password"]:focus {
            outline: none;
            border-color: #0066cc;
            background: #2a2a2a;
        }

        .form-group.checkbox {
            flex-direction: row;
            align-items: center;
            gap: 0.5rem;
        }

        .form-group.checkbox input[type="checkbox"] {
            width: 18px;
            height: 18px;
            cursor: pointer;
            accent-color: #0066cc;
        }

        .form-group.checkbox label {
            margin: 0;
            font-weight: 400;
            cursor: pointer;
        }

        .login-btn {
            padding: 0.85rem 1.5rem;
            background: #0066cc;
            color: white;
            border: none;
            border-radius: 6px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s;
        }

        .login-btn:hover {
            background: #0052a3;
            transform: translateY(-2px);
        }

        .login-btn:active {
            transform: translateY(0);
        }

        .login-footer {
            margin-top: 2rem;
            text-align: center;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .login-footer p {
            margin: 0;
            font-size: 0.9rem;
            color: #999;
        }

        .login-footer a {
            color: #0066cc;
            text-decoration: none;
            transition: color 0.3s;
        }

        .login-footer a:hover {
            color: #0052a3;
            text-decoration: underline;
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .hero h1 {
                font-size: 2rem;
            }

            .hero p {
                font-size: 1.1rem;
            }

            .section-title {
                font-size: 2rem;
            }

            .grid {
                grid-template-columns: 1fr;
            }

            .login-box {
                padding: 2rem;
            }

            .login-box h1 {
                font-size: 1.5rem;
            }
        }