/* CSS Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary-blue: #3b82f6;
    --deep-blue: #1d4ed8;
    --light-blue: #60a5fa;
    --accent-blue: #2563eb;
    --dark-blue: #1e3a8a;
    --text-primary: #ffffff;
    --text-secondary: #e5e7eb;
    --text-muted: #9ca3af;
    --background: #0f172a;
    --surface: #1e293b;
    --border: rgba(59, 130, 246, 0.2);
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
}

html {
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--background);
    overflow-x: hidden;
}

/* Error Messages */
.error-messages {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 0.5rem;
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.error-message {
    color: var(--error);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.error-message:last-child {
    margin-bottom: 0;
}

/* Header */
.header {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
}

.nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-img {
    width: auto;
    height: 50px;
    border-radius: 8px;
    object-fit: contain;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.checkout-steps {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.step {
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-blue);
}

/* Main Content */
.checkout-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 3rem;
    min-height: calc(100vh - 80px);
}

/* Checkout Form */
.checkout-form {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 2rem;
}

.form-section {
    margin-bottom: 2rem;
}

.section-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section-icon {
    width: 24px;
    height: 24px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
}

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

.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.form-input {
    width: 100%;
    padding: 0.875rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-blue);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-select {
    width: 100%;
    padding: 0.875rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2360a5fa' 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 1rem center;
    background-size: 1rem;
    padding-right: 3rem;
}

.form-select option {
    background: var(--surface);
    color: var(--text-primary);
}

.payment-methods {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.payment-info {
    background: rgba(59, 130, 246, 0.05);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.payment-details {
    display: none;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

.payment-details.active {
    display: block;
}

.payment-method {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.875rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.02);
}

.payment-method:hover,
.payment-method.active {
    border-color: var(--primary-blue);
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-blue);
}

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.checkbox-input {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-blue);
    margin-top: 0.125rem;
}

.checkbox-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

.checkbox-label a {
    color: var(--primary-blue);
    text-decoration: none;
}

.checkbox-label a:hover {
    text-decoration: underline;
}

.submit-button {
    width: 100%;
    background: linear-gradient(135deg, var(--success), #059669);
    color: white;
    padding: 1rem;
    border: none;
    border-radius: 0.75rem;
    font-weight: 700;
    font-size: 1.125rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.submit-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 25px rgba(16, 185, 129, 0.3);
}

.submit-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.security-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    padding: 0.75rem;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 0.5rem;
    color: var(--success);
    font-size: 0.875rem;
}

/* Order Summary */
.order-summary {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 2rem;
    height: fit-content;
    position: sticky;
    top: 2rem;
}

.summary-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.selected-plan {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.plan-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.plan-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.plan-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.plan-period {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.plan-features {
    list-style: none;
}

.plan-feature {
    padding: 0.25rem 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.plan-feature::before {
    content: '✓';
    color: var(--success);
    font-weight: bold;
    font-size: 0.75rem;
}

.price-breakdown {
    border-top: 1px solid var(--border);
    padding-top: 1rem;
    margin-bottom: 1.5rem;
}

.price-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    color: var(--text-secondary);
}

.price-row.total {
    border-top: 1px solid var(--border);
    padding-top: 1rem;
    margin-top: 1rem;
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--text-primary);
}

.discount {
    color: var(--success);
    font-weight: 600;
}

.guarantee-badge {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 0.75rem;
    padding: 1rem;
    text-align: center;
    color: var(--success);
    font-size: 0.875rem;
    font-weight: 600;
}

/* Order Confirmation Page */
.order-confirmation {
    display: none;
    min-height: 100vh;
    padding-top: 80px;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    position: relative;
}

.order-confirmation.active {
    display: block;
}

.order-confirmation::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 70%, rgba(16, 185, 129, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 70% 30%, rgba(59, 130, 246, 0.1) 0%, transparent 50%);
    z-index: 1;
}

.confirmation-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
    z-index: 2;
}

.confirmation-header {
    text-align: center;
    margin-bottom: 3rem;
}

.success-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--success), #059669);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    font-size: 3rem;
    animation: successPulse 2s infinite;
}

.confirmation-title {
    font-size: clamp(1.5rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
    line-height: 1.2;
}

.confirmation-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.order-details {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 2rem;
    margin-bottom: 3rem;
}

.order-details h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    text-align: center;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.detail-label {
    font-weight: 600;
    color: var(--text-primary);
}

.detail-value {
    color: var(--text-secondary);
    text-align: right;
    max-width: 60%;
    word-break: break-word;
}

.credentials-box {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 1rem;
    padding: 2rem;
    margin-bottom: 3rem;
    text-align: center;
}

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

.credentials-info {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 0.5rem;
    padding: 1rem;
    margin: 1rem 0;
    font-family: 'Courier New', monospace;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.credential-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    color: var(--text-primary);
}

.copy-button {
    background: var(--success);
    color: white;
    border: none;
    padding: 0.25rem 0.75rem;
    border-radius: 0.25rem;
    cursor: pointer;
    font-size: 0.75rem;
    transition: all 0.3s ease;
}

.copy-button:hover {
    background: #059669;
    transform: scale(1.05);
}

.next-steps {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 2rem;
    margin-bottom: 3rem;
}

.next-steps h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.step-item {
    padding: 0.75rem 0;
    color: var(--text-secondary);
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.step-number {
    background: var(--primary-blue);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: bold;
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.support-section {
    background: rgba(59, 130, 246, 0.05);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 2rem;
    text-align: center;
    margin-bottom: 2rem;
}

.support-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.support-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.support-button {
    background: linear-gradient(135deg, var(--primary-blue), var(--deep-blue));
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.support-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

.back-button {
    background: transparent;
    color: var(--text-secondary);
    padding: 1rem 2rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    display: inline-block;
    margin: 0 auto;
    text-align: center;
}

.back-button:hover {
    border-color: var(--primary-blue);
    color: var(--primary-blue);
}

@keyframes successPulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 0 20px rgba(16, 185, 129, 0);
    }
}

@media (max-width: 1024px) {
    .checkout-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .order-summary {
        position: static;
        order: -1;
    }
}

@media (max-width: 768px) {
    .checkout-container {
        padding: 1rem;
    }

    .checkout-form,
    .order-summary {
        padding: 1.5rem;
    }

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

    .payment-methods {
        grid-template-columns: 1fr;
    }

    .nav {
        padding: 0 1rem;
        flex-direction: column;
        gap: 1rem;
    }

    .checkout-steps {
        order: -1;
    }
}

@media (max-width: 480px) {
    .checkout-container {
        padding: 0.5rem;
    }

    .checkout-form,
    .order-summary {
        padding: 1rem;
    }
}