:root {
            --primary-bg: #f0f4f8;
            --accent-blue: #3b82f6;
            --soft-blue: #dbeafe;
            --glass-white: rgba(255, 255, 255, 0.8);
            --text-main: #1e293b;
            --text-muted: #64748b;
            --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
        }

        body {
            background-color: var(--primary-bg);
            background-image: 
                radial-gradient(at 0% 0%, hsla(210,100%,98%,1) 0, transparent 50%), 
                radial-gradient(at 50% 0%, hsla(215,100%,95%,1) 0, transparent 50%),
                radial-gradient(at 100% 0%, hsla(210,100%,98%,1) 0, transparent 50%);
            color: var(--text-main);
            line-height: 1.6;
            overflow-x: hidden;
        }

        .container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        nav {
            padding: 2rem 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.25rem;
            font-weight: 700;
            letter-spacing: -0.025em;
            color: var(--accent-blue);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        header {
            text-align: center;
            padding: 4rem 0 5rem;
        }

        h1 {
            font-size: 3.5rem;
            font-weight: 800;
            letter-spacing: -0.05em;
            margin-bottom: 1.5rem;
            background: linear-gradient(to right, #1e293b, #3b82f6);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-sub {
            font-size: 1.25rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }

        .tool-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
            gap: 2.5rem;
            margin-bottom: 6rem;
        }

        .tool-card {
            background: var(--glass-white);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.4);
            border-radius: 24px;
            padding: 3rem 2rem;
            text-align: center;
            box-shadow: var(--card-shadow);
            transition: var(--transition);
            cursor: pointer;
            position: relative;
            overflow: hidden;
            animation-delay: 0.1s;
        }

        .tool-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px -12px rgba(59, 130, 246, 0.15);
            border-color: var(--soft-blue);
        }

        .tool-icon {
            width: 64px;
            height: 64px;
            background: var(--soft-blue);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            color: var(--accent-blue);
        }

        .tool-card h2 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
        }

        .tool-card p {
            color: var(--text-muted);
            margin-bottom: 2rem;
            font-size: 0.95rem;
        }

        .btn-launch {
            display: inline-flex;
            align-items: center;
            padding: 0.75rem 1.5rem;
            background: var(--accent-blue);
            color: white;
            border-radius: 12px;
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            gap: 0.5rem;
        }

        .btn-launch:hover {
            background: #2563eb;
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
        }

        /* Content Sections */
        .content-section {
            background: white;
            border-radius: 32px;
            padding: 5rem 4rem;
            margin-bottom: 3rem;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            animation-delay: 0.3s;
        }

        #deep-dive-section {
            animation-delay: 0.4s;
            background: transparent;
            box-shadow: none;
            border: 1px solid var(--soft-blue);
        }

        .content-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
        }

        .content-block h3 {
            font-size: 1.75rem;
            margin-bottom: 1.25rem;
            color: var(--text-main);
        }

        .content-block p {
            margin-bottom: 1.5rem;
            color: var(--text-muted);
            font-size: 1.05rem;
        }

        .pitfalls-list {
            list-style: none;
            margin-top: 1rem;
        }

        .pitfalls-list li {
            position: relative;
            padding-left: 2rem;
            margin-bottom: 1rem;
            color: var(--text-muted);
        }

        .pitfalls-list li::before {
            content: "✕";
            position: absolute;
            left: 0;
            color: #ef4444;
            font-weight: bold;
        }

        .badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            background: var(--soft-blue);
            color: var(--accent-blue);
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 1rem;
        }

        /* FAQ Section */
        .faq-section {
            margin-bottom: 8rem;
            padding: 0 1rem;
            animation-delay: 0.5s;
        }

        .faq-header {
            text-align: center;
            margin-bottom: 3rem;
        }

        .faq-header h2 {
            font-size: 2.25rem;
            margin-bottom: 1rem;
        }

        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--glass-white);
            border: 1px solid rgba(0,0,0,0.05);
            border-radius: 16px;
            margin-bottom: 1rem;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-question {
            padding: 1.5rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-answer {
            padding: 0 1.5rem 1.5rem;
            color: var(--text-muted);
            display: none;
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            display: block;
        }

        .faq-item.active {
            border-color: var(--accent-blue);
            background: white;
            box-shadow: 0 4px 20px rgba(59, 130, 246, 0.08);
        }

        footer {
            padding: 4rem 0;
            text-align: center;
            border-top: 1px solid rgba(0,0,0,0.05);
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .animate {
            animation: fadeIn 0.8s ease forwards;
        }

        @media (max-width: 768px) {
            h1 { font-size: 2.5rem; }
            .content-grid { grid-template-columns: 1fr; gap: 3rem; }
            .content-section { padding: 3rem 1.5rem; }
            .tool-grid { grid-template-columns: 1fr; }
        }