header .btn {
    margin: 0;
}

.subtitle-course {
    color: #36034e;
    font-size: 40px;
}

#landing-main .btn {
    padding: 25px 55px;
    font-size: 20px;
}

#landing-main .btn.small {
    padding: 18px 42px;
    font-size: 15px;
    margin: 0;
}

.banner {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    padding: 30px;
    margin: 30px 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
}

.banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    pointer-events: none;
}

.banner p {
    color: white;
    font-size: 1.1rem;
    margin: 15px 0;
    font-weight: 500;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 1;
}

.banner p:first-child {
    font-size: 1.3rem;
    font-weight: bold;
    margin-bottom: 20px;
}

.faq-question ol {
    font-size: 18px;
    color: gray;
    list-style: decimal;
    padding-left: 19px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-in;
}

.faq-question ul {
    font-size: 18px;
    color: gray;
    padding-left: 19px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-in;
}

.big-faq {
    padding: 30px
}

.faq-question .active {
    overflow-y: auto;
}

.faq-question {
    overflow-y: visible;
}

.faq-question ol.active {
    max-height: 500px;
    overflow-y: auto;
}

.faq-question ul.active {
    max-height: 500px;
    overflow-y: auto;
}

#send-payment-btn {
    padding: 20px 40px;
    font-size: 20px;
}

.mini-section {
    padding: 0px 30px 20px 30px;
}

#payments-section p {
    font-size: 4vh;
    text-align: center;
}

#payments-section .small {
    font-size: 3.2vh;
}

#details-section .small {
    color: black;
    font-size: 16px;
}

.columns-section {
    display: flex;
    max-width: 800px;
    margin: 0 auto;
    gap: 20px;
    flex-wrap: wrap;
}

.column {
    position: relative;
    flex: 1;
    min-width: 280px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    overflow: hidden;
}

.column span {
    display: block;
    font-weight: 900;
    font-size: 14px;
    color: #000;
    text-align: center;
    padding: 8px 0;
    margin: 0;
}

.column p {
    text-align: center;
}

.column .package-title {
    background-color: #36034e;
    color: white;
    width: 100%;
}

.column #recommended {
    background-color: #ccff00;
    width: 55%;
    margin-left: 45%;
}

.column .reddish {
    color: #fe5f77;
}

.column > div {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid #eee;
}

.column > div p:first-child {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 10px;
    color: #333;
}

.column > div p {
    font-size: 16px;
    color: #666;
}

.column ul {
    list-style: none;
    padding: 20px;
}

.column li {
    padding: 8px 0;
    border-bottom: 1px solid #f0f0f0;
    font-size: 14px;
    color: #1b61a7;
}

.column li:last-child {
    border-bottom: none;
}

.column button {
    width: 100%;
    background-color: #36034e;
    color: white;
    padding: 15px;
    margin-bottom: 15px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s;
}

.column button:hover {
    background-color: #764ba2;
}

.stats-container {
    background: white;
    border-radius: 12px;
    padding: 25px 30px;
    margin: 25px auto;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border: 1px solid #e8e8e8;
    display: flex;
    flex-direction: row;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
}

.stat-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: #36034e;
}

.stat-icon {
    font-size: 1.8rem;
    flex-shrink: 0;
    width: 40px;
    height: 100%;
}

.stat-content {
    flex: 1;
}

.stat-number {
    font-size: 1.3rem;
    font-weight: 600;
    color: #36034e;
    margin: 0 0 2px 0;
}

.stat-label {
    font-size: 0.85rem;
    color: #666;
    margin: 0;
}

#registration-modal {
    display: none;
    position: fixed;
    z-index: 999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
}

#registration-modal.active {
    display: flex;
}

#registration-modal .modal-content {
    background-color: white;
    border-radius: 10px;
    padding: 30px;
    width: 90%;
    max-width: 400px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

#registration-modal .close-modal {
    float: right;
    font-size: 24px;
    font-weight: bold;
    cursor: pointer;
    color: #716a74;
}

#registration-modal .subtitle {
    color: #666;
    font-size: 0.9em;
    margin: -15px 0 20px 0;
    text-align: center;
}

#registration-modal button {
    width: 100%;
    background-color: #36034e;
    color: white;
    padding: 15px;
    margin-bottom: 15px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s;
}

#registration-modal button:hover {
    background-color: #ccff00;
    color: #36034e;
}

.btn-social-login {
    width: 100%;
    padding: 12px 15px;
    border-radius: 7px;
    border: 1px solid #e0e0e0;
    background-color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 15px;
    transition: background-color 0.3s;
}

.btn-social-login:hover {
    background-color: #f7f7f7;
}

.btn-social-login img {
    height: 40px;
    width: auto;
    margin-right: 10px;
}

#registration-form {
    display: flex;
    flex-direction: column;
    align-items: center;
}

#phone-area-code {
    width: 100%;
    padding: 12px 40px 12px 16px;
    font-size: 15px;
    font-family: inherit;
    color: #333;
    background-color: white;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 20px;
}

#phone-area-code:hover {
    border-color: #b0b0b0;
}

#phone-area-code:focus {
    outline: none;
    border-color: #4a90e2;
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

#phone-area-code:disabled {
    background-color: #f5f5f5;
    cursor: not-allowed;
    opacity: 0.6;
}

 #phone-area-code option {
    padding: 10px;
    font-size: 15px;
}

#phone-area-code option:hover {
    background-color: #f0f0f0;
}

#phone-help {
    font-size: 14px;
    color: #666;
    margin-top: 5px;
}

.form-group {
    margin-bottom: 15px;
    width: 100%;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

@media (min-width: 769px) {
    .column span {
        font-size: 1.2em;
        padding: 6px 0;
    }

    .stat-title {
        font-size: 1.4rem;
    }
}

@media (max-width: 920px) {
    .stats-container {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .columns-section {
        flex-direction: column;
    }
    
    .column {
        min-width: 100%;
    }
    
    .column span {
        font-size: 4vw;
        padding: 5px 0;
    }
    
    .column:nth-child(2) span {
        width: 55%;
        margin-left: 45%;
    }
    .banner {
        padding: 20px;
        margin: 20px 0;
    }
    
    .banner p {
        font-size: 1rem;
    }

    #topics-list {
        padding: 5px 0px;
    }
    
    #topics-section {
        padding: 40px 20px;
    }

    #topics-list li {
        font-size: 16px;
    }
    .subtitle-course {
        font-size: 22px;
    }

    .stats-container {
        padding: 20px;
        margin: 20px auto;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .stat-item {
        padding: 15px;
    }

    .stat-icon {
        font-size: 1.5rem;
    }

    .stat-number {
        font-size: 1.1rem;
    }

    .stat-label {
        font-size: 0.8rem;
    }
}