:root {
            --primary-color: #1a365d; /* Dark Medical Blue */
            --secondary-color: #f1f8fc;
            --accent-color: #10b981; /* Success Green */
            --zoom-blue: #2D8CFF;
            --text-dark: #1f2937;
            --text-light: #6b7280;
            --border-color: #e5e7eb;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Inter', sans-serif;
        }

        body {
            background-color: #f3f4f6;
            color: var(--text-dark);
            line-height: 1.6;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        .header {
            background-color: var(--primary-color);
            text-align: center;
        }

        .header img {
            max-height: 75px;
            width: auto;
        }

        .container {
            max-width: 600px;
            margin: 40px auto;
            padding: 0 20px;
            flex: 1;
            width: 100%;
        }

        .card {
            background: #ffffff;
            border-radius: 12px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
            padding: 40px;
            text-align: center;
        }

        .success-icon {
            width: 80px;
            height: 80px;
            background-color: #d1fae5;
            color: var(--accent-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
        }

        .success-icon svg {
            width: 40px;
            height: 40px;
        }

        h1 {
            font-size: 26px;
            color: var(--text-dark);
            margin-bottom: 8px;
            letter-spacing: -0.5px;
        }

        .webinar-title {
            color: var(--text-light);
            font-size: 15px;
            margin-bottom: 30px;
            padding-bottom: 25px;
            border-bottom: 1px solid var(--border-color);
        }

        .zoom-details {
            background-color: var(--secondary-color);
            border: 1px solid #bae6fd;
            border-radius: 10px;
            padding: 25px;
            margin-bottom: 30px;
            text-align: left;
        }

        .zoom-details h3 {
            font-size: 16px;
            color: var(--primary-color);
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 8px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .zoom-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px dashed #cbd5e1;
        }

        .zoom-row:last-child {
            border-bottom: none;
        }

        .zoom-label {
            font-weight: 500;
            color: #475569;
            font-size: 15px;
        }

        .zoom-value {
            font-weight: 600;
            color: var(--text-dark);
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
        }

        .copy-btn {
            background: #e0f2fe;
            border: none;
            color: var(--zoom-blue);
            cursor: pointer;
            padding: 6px;
            border-radius: 6px;
            transition: all 0.2s;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .copy-btn:hover {
            background-color: #bae6fd;
            transform: scale(1.05);
        }

        .copy-btn svg {
            width: 16px;
            height: 16px;
        }

        .btn-join {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            background-color: var(--zoom-blue);
            color: white;
            text-decoration: none;
            padding: 16px 28px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 16px;
            width: 100%;
            transition: background-color 0.3s, transform 0.1s;
            box-shadow: 0 4px 6px rgba(45, 140, 255, 0.2);
        }

        .btn-join:hover {
            background-color: #1a73e8;
        }

        .btn-join:active {
            transform: translateY(1px);
        }

        .instructions {
            font-size: 14px;
            color: var(--text-light);
            margin-top: 20px;
        }

        .footer {
            text-align: center;
            padding: 20px;
            color: var(--text-light);
            font-size: 14px;
        }

        /* Toast Notification CSS */
        #toast {
            visibility: hidden;
            min-width: 250px;
            background-color: #1f2937;
            color: #fff;
            text-align: center;
            border-radius: 8px;
            padding: 12px 16px;
            position: fixed;
            z-index: 1000;
            left: 50%;
            bottom: 30px;
            transform: translateX(-50%);
            font-size: 14px;
            font-weight: 500;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            opacity: 0;
            transition: opacity 0.3s, bottom 0.3s;
        }

        #toast.show {
            visibility: visible;
            opacity: 1;
            bottom: 40px;
        }

        @media (max-width: 480px) {
            .card {
                padding: 30px 20px;
            }
            .zoom-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 5px;
            }
            .zoom-value {
                width: 100%;
                justify-content: space-between;
            }
        }