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

:root {
    --primary-blue: #0055cc;
    --primary-green: #28A745;
    --white: #FFFFFF;
    --light-gray: #F8F9FA;
    --gray: #6C757D;
    --dark-gray: #212529;
    --border-gray: #DEE2E6;
    --text-gray: #495057;
    --error: #DC3545;
    --success: #28A745;
    --hover-blue: #004499;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--white);
    color: var(--dark-gray);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Screens */
.screen {
    display: none;
    min-height: 100vh;
}

.screen.active {
    display: flex;
    flex-direction: column;
}

/* Landing Page */
.landing-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    background: linear-gradient(135deg, #f5f7fa 0%, #e9ecef 100%);
}

.landing-content {
    text-align: center;
    max-width: 600px;
    width: 100%;
}

.landing-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 1rem;
    letter-spacing: 1px;
}

.landing-subtitle {
    font-size: 1.5rem;
    color: var(--text-gray);
    margin-bottom: 2rem;
    font-weight: 400;
}

.landing-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2.5rem;
    align-items: center;
}

.feature-check {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.1rem;
    color: var(--text-gray);
}

.check-icon {
    color: var(--primary-green);
    font-size: 1.5rem;
    font-weight: bold;
}

.btn-large {
    padding: 1.25rem 3rem;
    font-size: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
}

.landing-stats {
    margin-top: 2rem;
    color: var(--text-gray);
    font-size: 1rem;
}

/* Simple Footer */
.simple-footer {
    background-color: var(--white);
    padding: 2rem 1rem;
    text-align: center;
    border-top: 1px solid var(--border-gray);
}

.footer-links-simple {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.footer-links-simple a {
    color: var(--primary-blue);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-links-simple a:hover {
    color: var(--hover-blue);
    text-decoration: underline;
}

.footer-links-simple span {
    color: var(--gray);
}

.footer-text-simple {
    font-size: 0.85rem;
    color: var(--text-gray);
    margin-bottom: 0.25rem;
}

.footer-cnpj {
    font-size: 0.8rem;
    color: var(--gray);
}

/* Container */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
    width: 100%;
    flex: 1;
}

/* Page Header */
.page-header {
    text-align: center;
    margin-bottom: 2rem;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.page-subtitle {
    font-size: 1.1rem;
    color: var(--text-gray);
    font-weight: 400;
}

.checkout-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: 0.5rem;
}

/* Form Section */
.form-section {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    border: 1px solid var(--border-gray);
}

.section-title {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: 1.5rem;
    text-align: center;
}

.section-subtitle {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: 1rem;
}

/* Forms */
.form {
    width: 100%;
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark-gray);
    font-size: 0.95rem;
}

.form-help {
    font-size: 0.85rem;
    color: var(--text-gray);
    margin-bottom: 0.5rem;
    font-weight: 400;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group select {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--border-gray);
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
    background-color: var(--white);
    color: var(--dark-gray);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 85, 204, 0.1);
}

.error-message {
    display: none;
    color: var(--error);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.error-message.show {
    display: block;
}

.form-group input.error,
.form-group select.error {
    border-color: var(--error);
}

/* Value Options */
.value-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
    margin-top: 0.5rem;
}

.value-option {
    cursor: pointer;
    display: block;
    position: relative;
}

.value-option input[type="radio"] {
    display: none;
}

.value-card {
    padding: 1.25rem 1rem;
    border: 2px solid var(--border-gray);
    border-radius: 6px;
    text-align: center;
    transition: all 0.3s ease;
    background-color: var(--white);
    position: relative;
}

.value-card:hover {
    border-color: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 85, 204, 0.15);
}

.value-option input[type="radio"]:checked + .value-card {
    border-color: var(--primary-green);
    background-color: rgba(40, 167, 69, 0.05);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.2);
}

.value-amount {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.value-bonus {
    display: block;
    font-size: 0.875rem;
    color: var(--primary-green);
    font-weight: 600;
}

.value-badge {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--primary-blue);
    font-weight: 600;
    text-transform: uppercase;
}

/* Checkout Summary */
.checkout-container {
    display: grid;
    gap: 2rem;
}

.checkout-summary {
    background-color: var(--light-gray);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-gray);
}

.summary-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: 1rem;
}

.summary-item {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-gray);
}

.summary-item:last-child {
    border-bottom: none;
}

.summary-item.summary-total {
    border-top: 2px solid var(--dark-gray);
    margin-top: 0.5rem;
    padding-top: 1rem;
    font-weight: 700;
}

.summary-label {
    color: var(--text-gray);
    font-size: 0.95rem;
}

.summary-value {
    color: var(--dark-gray);
    font-weight: 600;
    font-size: 0.95rem;
}

.summary-item.summary-total .summary-value {
    font-size: 1.25rem;
    color: var(--primary-blue);
}

/* Payment Options */
.payment-options {
    margin-top: 0.5rem;
}

.payment-section-label {
    display: block;
    margin-bottom: 1rem;
    font-weight: 500;
    color: var(--dark-gray);
    font-size: 0.95rem;
}

.payment-option {
    display: block;
    cursor: pointer;
    margin-bottom: 1rem;
}

.payment-option input[type="radio"] {
    display: none;
}

.payment-card {
    display: flex;
    align-items: center;
    padding: 1.5rem;
    border: 2px solid var(--border-gray);
    border-radius: 6px;
    transition: all 0.3s ease;
    background-color: var(--white);
}

.payment-card:hover {
    border-color: var(--primary-blue);
    box-shadow: 0 4px 12px rgba(0, 85, 204, 0.1);
}

.payment-option input[type="radio"]:checked + .payment-card {
    border-color: var(--primary-blue);
    background-color: rgba(0, 85, 204, 0.05);
    box-shadow: 0 4px 12px rgba(0, 85, 204, 0.15);
}

.payment-icon {
    font-size: 2.5rem;
    margin-right: 1.5rem;
}

.payment-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: 0.25rem;
}

.payment-info p {
    font-size: 0.9rem;
    color: var(--text-gray);
}

/* PIX Container */
.pix-container {
    text-align: center;
}

.pix-qr {
    margin: 2rem 0;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    background-color: var(--white);
    border: 2px solid var(--border-gray);
    border-radius: 8px;
}

.pix-qr canvas {
    max-width: 100%;
    height: auto;
}

.pix-code {
    margin-bottom: 2rem;
}

.pix-code label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 500;
    color: var(--dark-gray);
    text-align: left;
}

.pix-code-wrapper {
    display: flex;
    gap: 0.75rem;
}

.pix-code-wrapper input {
    flex: 1;
    padding: 0.875rem 1rem;
    border: 1px solid var(--border-gray);
    border-radius: 4px;
    font-size: 0.875rem;
    font-family: 'Courier New', monospace;
    background-color: var(--light-gray);
}

/* Buttons */
.btn {
    width: 100%;
    padding: 1rem 2rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary {
    background-color: var(--primary-blue);
    color: var(--white);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--hover-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 85, 204, 0.3);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-primary:disabled {
    background-color: #CCCCCC;
    cursor: not-allowed;
    opacity: 0.6;
}

.btn-secondary {
    background-color: var(--light-gray);
    color: var(--dark-gray);
    padding: 0.875rem 1.5rem;
    white-space: nowrap;
    text-transform: none;
    width: auto;
}

.btn-secondary:hover {
    background-color: #E9ECEF;
}

/* Success Message */
.success-message {
    text-align: center;
    padding: 4rem 2rem;
}

.success-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 2rem;
    background-color: var(--success);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    font-weight: bold;
}

.success-message h2 {
    font-size: 2rem;
    color: var(--primary-green);
    margin-bottom: 1rem;
    font-weight: 600;
}

.success-message p {
    color: var(--text-gray);
    font-size: 1.1rem;
}

/* Responsive */
@media (max-width: 768px) {
    .landing-title {
        font-size: 2rem;
    }

    .landing-subtitle {
        font-size: 1.25rem;
    }

    .container {
        padding: 1.5rem 1rem;
    }

    .form-section {
        padding: 1.5rem;
    }

    .page-title {
        font-size: 1.75rem;
    }

    .value-options {
        grid-template-columns: repeat(2, 1fr);
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .pix-code-wrapper {
        flex-direction: column;
    }

    .btn-secondary {
        width: 100%;
    }

    .checkout-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .landing-title {
        font-size: 1.75rem;
    }

    .landing-subtitle {
        font-size: 1.1rem;
    }

    .value-options {
        grid-template-columns: 1fr;
    }

    .value-card {
        padding: 1rem;
    }

    .payment-card {
        padding: 1rem;
        flex-direction: column;
        text-align: center;
    }

    .payment-icon {
        margin-right: 0;
        margin-bottom: 0.5rem;
    }

    .form-section {
        padding: 1.25rem;
    }
}