:root {
            --navy-blue: #001f3f;
            --teal: #3b82f6;
            --white: #ffffff;
            --light-gray: #f9f9f9;
            --dark-gray: #2d3748;
            --gray: #4a5568;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
        }

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

        body {
            font-family: 'Open Sans', sans-serif;
            line-height: 1.6;
            color: var(--gray);
            background-color: var(--white);
            -webkit-font-smoothing: antialiased;
        }

        h1, h2, h3 {
            font-family: 'Poppins', sans-serif;
            font-weight: 600;
            color: var(--navy-blue);
            line-height: 1.3;
        }

        h1 {
            font-size: clamp(2rem, 5vw, 2.8rem);
            font-weight: 700;
        }

        h2 {
            font-size: clamp(1.8rem, 4vw, 2.2rem);
            margin-bottom: 1.5rem;
        }

        h3 {
            font-size: clamp(1.3rem, 3vw, 1.5rem);
            margin-bottom: 1rem;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 10px clamp(1rem, 3vw, 2rem);
        }

        section {
            padding: clamp(3rem, 6vw, 5rem) 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--teal);
            color: var(--white);
            padding: 0.8rem clamp(1.5rem, 3vw, 2rem);
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s;
            border: none;
            cursor: pointer;
        }

        .btn:hover {
            background-color: var(--navy-blue);
            transform: translateY(-2px);
        }

        .text-center {
            text-align: center;
        }

        /* Hero Section */
        .join-hero {
            background: linear-gradient(rgba(0, 31, 63, 0.9), rgba(0, 31, 63, 0.9)), url('https://images.unsplash.com/photo-1581092918056-0c4c3acd3789?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80');
            background-size: cover;
            background-position: center;
            color: var(--white);
            padding: clamp(6rem, 10vw, 8rem) 0 clamp(4rem, 6vw, 6rem);
            text-align: center;
        }

        .join-hero h1 {
            color: var(--white);
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }

        .join-hero p {
            font-size: clamp(1.1rem, 2vw, 1.3rem);
            max-width: min(700px, 90%);
            margin: 0 auto 2rem;
            color: rgba(255, 255, 255, 0.9);
        }

        /* Benefits Section */
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
            gap: clamp(1.5rem, 3vw, 2rem);
            margin-top: 3rem;
        }

        .benefit-card {
            background: var(--white);
            padding: clamp(1.5rem, 2vw, 2rem);
            border-radius: 12px;
            box-shadow: var(--shadow);
            transition: all 0.3s;
            text-align: center;
        }

        .benefit-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }

        .benefit-icon {
            font-size: clamp(2rem, 3vw, 2.5rem);
            color: var(--teal);
            margin-bottom: 1.5rem;
        }

        /* Membership Tiers */
        .tiers-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
            gap: clamp(1.5rem, 3vw, 2rem);
            margin-top: 3rem;
        }

        .tier-card {
            background: var(--white);
            border-radius: 12px;
            box-shadow: var(--shadow);
            overflow: hidden;
        }

        .tier-header {
            background: var(--navy-blue);
            color: var(--white);
            padding: 1.5rem;
            text-align: center;
        }

        .tier-header h3 {
            color: var(--white);
        }

        .tier-features {
            padding: 1.5rem;
        }

        .tier-features ul {
            list-style: none;
            margin-bottom: 1.5rem;
        }

        .tier-features li {
            margin-bottom: 0.8rem;
            padding-left: 1.5rem;
            position: relative;
        }

        .tier-features li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            color: var(--teal);
        }

        /* Form Section */
        .form-container {
            max-width: 800px;
            margin: 0 auto;
            background: var(--white);
            padding: clamp(2rem, 3vw, 3rem);
            border-radius: 12px;
            box-shadow: var(--shadow);
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }

        .form-control {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-family: inherit;
        }

        textarea.form-control {
            min-height: 120px;
        }

        /* Testimonials */
        .testimonial-card {
            background: var(--white);
            padding: clamp(1.5rem, 2vw, 2rem);
            border-radius: 12px;
            box-shadow: var(--shadow);
            text-align: center;
        }

        .testimonial-icon {
            font-size: 2rem;
            color: var(--teal);
            margin-bottom: 1rem;
        }

        @media (max-width: 768px) {
            .form-row {
                grid-template-columns: 1fr;
                gap: 0;
            }

        }