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

        body {
            background: linear-gradient(145deg, #0f212e 0%, #0a161f 100%);
            font-family: 'Segoe UI', 'Inter', system-ui, -apple-system, 'Roboto', 'Helvetica Neue', sans-serif;
            line-height: 1.5;
            color: #eef4ff;
            padding: 2rem 1rem;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            background: rgba(18, 30, 39, 0.7);
            backdrop-filter: blur(2px);
            border-radius: 2.5rem;
            box-shadow: 0 25px 45px -12px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.05);
            overflow: hidden;
            border: 1px solid rgba(255, 215, 150, 0.2);
        }

        .hero {
            background: linear-gradient(115deg, #111f28 0%, #10232e 100%);
            padding: 2.5rem 2rem 2rem 2rem;
            border-bottom: 1px solid #ffcd7e30;
            text-align: center;
        }

        .hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.01em;
            background: linear-gradient(135deg, #FFF0D4, #FFD98C);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            text-shadow: 0 2px 5px rgba(0,0,0,0.2);
            margin-bottom: 0.5rem;
        }

        .hero .tagline {
            font-size: 1.2rem;
            color: #b9d6e3;
            border-top: 1px solid #ffcd7e40;
            display: inline-block;
            padding-top: 0.75rem;
            margin-top: 0.5rem;
            font-weight: 500;
        }

        .content {
            padding: 2rem 2rem 2.5rem 2rem;
        }

        .definition-card {
            background: #0f1c24;
            border-left: 6px solid #F7B32B;
            border-radius: 1.5rem;
            padding: 1.5rem 2rem;
            margin-bottom: 2rem;
            box-shadow: 0 8px 20px rgba(0,0,0,0.2);
        }

        .definition-card p {
            font-size: 1.08rem;
            margin-bottom: 1rem;
        }

        .equity-highlight {
            background: #1e2f3a;
            padding: 0.8rem 1rem;
            border-radius: 1rem;
            font-family: 'JetBrains Mono', 'SF Mono', monospace;
            font-size: 1rem;
            margin: 1rem 0 0.5rem 0;
            color: #FFDD99;
            border: 1px solid #f7b32b60;
        }

        h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin: 1.8rem 0 1rem 0;
            padding-bottom: 0.3rem;
            border-bottom: 2px solid #FFCD7E;
            display: inline-block;
            letter-spacing: -0.2px;
        }

        h3 {
            font-size: 1.35rem;
            font-weight: 600;
            margin: 1.5rem 0 0.8rem 0;
            color: #FFE2B5;
        }

        .principle-box {
            background: #07131b;
            border-radius: 1.25rem;
            padding: 1.2rem 1.5rem;
            margin: 1rem 0;
            border: 1px solid #2c4a5e;
        }

        .principle-steps {
            list-style-type: none;
            margin-top: 0.75rem;
        }

        .principle-steps li {
            margin: 0.7rem 0;
            padding-left: 1.6rem;
            position: relative;
        }

        .principle-steps li:before {
            content: "🎴";
            position: absolute;
            left: 0;
            top: 0;
            font-size: 1rem;
        }

        .example-result {
            background: #0b1921;
            border-radius: 1rem;
            padding: 1rem 1.5rem;
            font-family: monospace;
            margin: 0.8rem 0;
            border-left: 4px solid #F7B32B;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
            gap: 1.2rem;
            margin: 1.5rem 0 2rem 0;
        }

        .feature-card {
            background: #0e1b23d9;
            border-radius: 1.2rem;
            padding: 1.2rem 1rem;
            backdrop-filter: blur(2px);
            transition: all 0.2s ease;
            border: 1px solid #2a4858;
        }

        .feature-card strong {
            color: #FFD966;
            font-size: 1.1rem;
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 700;
        }

        .feature-card p {
            font-size: 0.9rem;
            color: #cbdfea;
        }

        .table-types {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            background: #0a151e;
            border-radius: 1rem;
            overflow: hidden;
        }

        .table-types th {
            background: #1e3a4a;
            padding: 12px 16px;
            text-align: left;
            font-weight: 700;
            color: #FFE1A0;
        }

        .table-types td {
            padding: 12px 16px;
            border-bottom: 1px solid #1e3f4b;
            vertical-align: top;
        }

        .table-types tr:last-child td {
            border-bottom: none;
        }

        .warning-box {
            background: #2a1f1a;
            border-left: 6px solid #D97706;
            padding: 1.2rem 1.5rem;
            border-radius: 1rem;
            margin: 1.8rem 0;
        }

        .takeaway-list {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin: 1.5rem 0;
        }

        .takeaway-item {
            background: #0F212E;
            flex: 1 1 200px;
            padding: 0.9rem;
            border-radius: 1rem;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .takeaway-item:before {
            content: "✅";
            font-size: 1.2rem;
        }

        footer {
            text-align: center;
            margin-top: 2.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid #2c5164;
            font-size: 0.8rem;
            color: #7f9aa8;
        }

        @media (max-width: 680px) {
            .hero h1 {
                font-size: 1.8rem;
            }
            .content {
                padding: 1.5rem;
            }
            .definition-card {
                padding: 1rem;
            }
            h2 {
                font-size: 1.5rem;
            }
        }

        .small-note {
            font-size: 0.85rem;
            color: #b9cfdd;
        }