/**
 * ZeroPay Gateway - Modern Frontend Styles
 * @package ZeroPay_Gateway
 */

/* CSS Variables (Design System) */
:root {
    --zp-primary: #2563eb;
    --zp-primary-dark: #1d4ed8;
    --zp-success: #16a34a;
    --zp-warning: #f59e0b;
    --zp-danger: #dc2626;
    --zp-gray-50: #f9fafb;
    --zp-gray-100: #f3f4f6;
    --zp-gray-200: #e5e7eb;
    --zp-gray-300: #d1d5db;
    --zp-gray-400: #9ca3af;
    --zp-gray-500: #6b7280;
    --zp-gray-600: #4b5563;
    --zp-gray-700: #374151;
    --zp-gray-800: #1f2937;
    --zp-gray-900: #111827;
    --zp-radius-sm: 6px;
    --zp-radius-md: 10px;
    --zp-radius-lg: 16px;
    --zp-shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --zp-shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --zp-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --zp-transition: all 0.2s ease-in-out;
}

/* Payment Method Selection */
.zeropay-gateway-desc {
    font-size: 14px;
    color: var(--zp-gray-600);
    margin: 0 0 16px;
}

.zeropay-payment-methods {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 16px 0;
}

.zeropay-method-option {
    border: 2px solid var(--zp-gray-200);
    border-radius: var(--zp-radius-md);
    padding: 0;
    background: #fff;
    transition: var(--zp-transition);
    cursor: pointer;
    overflow: hidden;
}

.zeropay-method-option:hover {
    border-color: var(--zp-primary);
    box-shadow: var(--zp-shadow-sm);
}

.zeropay-method-option.active,
.zeropay-method-option:has(input:checked) {
    border-color: var(--zp-primary);
    background: linear-gradient(135deg, #eff6ff 0%, #f0f9ff 100%);
    box-shadow: var(--zp-shadow-md);
}

.method-header {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 18px;
    cursor: pointer;
    margin: 0;
    width: 100%;
}

.zeropay-method-option input[type=radio] {
    width: 20px;
    height: 20px;
    accent-color: var(--zp-primary);
    flex-shrink: 0;
    margin: 0;
    cursor: pointer;
}

.method-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--zp-primary) 0%, #1d4ed8 100%);
    color: #fff;
    border-radius: var(--zp-radius-sm);
    font-size: 18px;
    flex-shrink: 0;
}

.method-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
    min-width: 0;
}

.method-name {
    font-weight: 600;
    font-size: 15px;
    color: var(--zp-gray-800);
    line-height: 1.3;
}

.method-desc {
    font-size: 13px;
    color: var(--zp-gray-500);
    line-height: 1.4;
}

.method-discount {
    display: inline-block;
    margin-top: 4px;
    padding: 2px 8px;
    background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
    color: #ffffff;
    font-size: 11px;
    font-weight: 600;
    border-radius: var(--zp-radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    line-height: 1.3;
    align-self: flex-start;
}

/* Acknowledgement Checkbox */
.zp-acknowledge {
    margin-top: 20px;
    padding: 16px 18px;
    background: var(--zp-gray-50);
    border: 1px solid var(--zp-gray-200);
    border-radius: var(--zp-radius-md);
    transition: var(--zp-transition);
    overflow: auto;
}

.zp-acknowledge:hover {
    border-color: var(--zp-primary);
}

.zp-acknowledge label {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
    margin: 0;
    font-weight: 400;
}

.zp-acknowledge input[type=checkbox] {
    width: 18px;
    height: 18px;
    accent-color: var(--zp-primary);
    flex-shrink: 0;
    margin-top: 2px;
    cursor: pointer;
}

.zp-acknowledge .ack-text {
    font-size: 13px;
    color: var(--zp-gray-600);
    line-height: 1.5;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* UPI Payment Card */
.zp-upi-card {
    background: linear-gradient(135deg, #1e3a5f 0%, #0f2027 100%);
    border-radius: var(--zp-radius-lg);
    padding: 28px;
    color: #fff;
    box-shadow: var(--zp-shadow-lg);
    max-width: 480px;
    margin: 0 auto;
}

.zp-upi-card .zp-card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255,255,255,0.15);
}

.zp-upi-card .zp-card-header .zp-icon {
    width: 36px;
    height: 36px;
    background: rgba(255,255,255,0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.zp-upi-card .zp-card-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.zp-upi-card .zp-field {
    margin-bottom: 14px;
}

.zp-upi-card .zp-field-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: rgba(255,255,255,0.6);
    margin-bottom: 4px;
}

.zp-upi-card .zp-field-value {
    font-size: 16px;
    font-weight: 500;
    font-family: "SF Mono", Monaco, "Cascadia Code", monospace;
    word-break: break-all;
}

.zp-upi-card .zp-amount {
    font-size: 28px;
    font-weight: 700;
    color: #4ade80;
}

.zp-upi-card .zp-security-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(74, 222, 128, 0.15);
    color: #4ade80;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    margin-top: 12px;
}

.zp-copy-row {
    display: flex;
    gap: 10px;
    margin-top: 16px;
    flex-wrap: wrap;
}

.zp-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 18px;
    border-radius: var(--zp-radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: var(--zp-transition);
    text-decoration: none;
}

.zp-btn-primary {
    background: var(--zp-primary);
    color: #fff;
}

.zp-btn-primary:hover {
    background: var(--zp-primary-dark);
}

.zp-btn-outline {
    background: rgba(255,255,255,0.1);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.3);
}

.zp-btn-outline:hover {
    background: rgba(255,255,255,0.2);
}

.zp-btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

/* Payment Instructions */
.zp-instructions {
    background: var(--zp-gray-50);
    border-radius: var(--zp-radius-md);
    padding: 20px;
    margin-top: 16px;
}

.zp-instructions h4 {
    margin: 0 0 14px 0;
    font-size: 15px;
    color: var(--zp-gray-800);
}

.zp-instructions ol {
    margin: 0;
    padding-left: 20px;
    color: var(--zp-gray-600);
    font-size: 14px;
    line-height: 1.7;
}

.zp-instructions ol li {
    margin-bottom: 8px;
}

/* UPI Pay Button */
.zp-upi-launch {
    text-align: center;
    margin: 24px 0;
    padding: 20px;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-radius: var(--zp-radius-lg);
    border: 1px solid #bae6fd;
}

.zp-upi-pay-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    background: linear-gradient(135deg, var(--zp-primary) 0%, #1d4ed8 100%);
    color: #fff;
    border-radius: var(--zp-radius-lg);
    box-shadow: var(--zp-shadow-md);
    transition: var(--zp-transition);
    border: none;
    cursor: pointer;
    min-width: 240px;
}

.zp-upi-pay-btn::before {
    content: "\2192";
    font-size: 20px;
}

.zp-upi-pay-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--zp-shadow-lg);
    color: #fff;
    background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
}

.zp-upi-hint {
    margin-top: 12px;
    font-size: 13px;
    color: var(--zp-text-light);
}

/* UPI Fallback (Desktop) */
.zp-upi-fallback {
    margin: 20px 0;
    padding: 16px;
    background: var(--zp-bg);
    border-radius: var(--zp-radius-md);
    border: 1px solid var(--zp-border);
}

.zp-upi-fallback h4 {
    margin: 0 0 12px;
    font-size: 15px;
    color: var(--zp-text);
}

.zp-upi-fallback ol {
    margin: 0 0 12px;
    padding-left: 20px;
    font-size: 14px;
    color: var(--zp-text-light);
}

.zp-upi-fallback ol li {
    margin-bottom: 6px;
}

/* QR Note */
.zp-qr-note {
    margin-top: 10px;
    font-size: 13px;
    color: var(--zp-text-light);
}

/* QR Code Section */
.zp-qr-section {
    text-align: center;
    margin-top: 20px;
    padding: 20px;
    background: var(--zp-gray-50);
    border-radius: var(--zp-radius-md);
}

.zp-qr-section h4 {
    margin: 0 0 16px 0;
    font-size: 15px;
    color: var(--zp-gray-800);
}

.zp-qr-section img {
    max-width: 220px;
    height: auto;
    border-radius: var(--zp-radius-sm);
    box-shadow: var(--zp-shadow-sm);
}

/* Acknowledgement Checkbox */
.zp-acknowledge {
    margin: 20px 0;
    padding: 16px;
    background: #fffbeb;
    border: 1px solid #fcd34d;
    border-radius: var(--zp-radius-md);
}

.zp-acknowledge label {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    cursor: pointer;
    font-size: 14px;
    color: var(--zp-gray-700);
    line-height: 1.5;
    margin: 0;
}

.zp-acknowledge input[type=checkbox] {
    width: 18px;
    height: 18px;
    accent-color: var(--zp-primary);
    flex-shrink: 0;
    margin-top: 2px;
}

/* Thank You / Payment Page */
.zp-payment-page {
    max-width: 700px;
    margin: 0 auto;
    padding: 20px;
}

.zp-order-summary {
    background: #fff;
    border: 1px solid var(--zp-gray-200);
    border-radius: var(--zp-radius-lg);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--zp-shadow-sm);
}

.zp-order-summary h2 {
    margin: 0 0 20px 0;
    font-size: 20px;
    color: var(--zp-gray-800);
}

.zp-summary-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.zp-summary-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.zp-summary-item .label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--zp-gray-500);
}

.zp-summary-item .value {
    font-size: 16px;
    font-weight: 600;
    color: var(--zp-gray-800);
}

.zp-summary-item .value.status-awaiting-payment { color: var(--zp-warning); }
.zp-summary-item .value.status-payment-submitted { color: var(--zp-primary); }
.zp-summary-item .value.status-payment-approved { color: var(--zp-success); }
.zp-summary-item .value.status-payment-rejected { color: var(--zp-danger); }

/* Progress Tracker */
.zp-progress-tracker {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 24px 0;
    padding: 20px;
    background: #fff;
    border-radius: var(--zp-radius-md);
    border: 1px solid var(--zp-gray-200);
    overflow-x: auto;
}

.zp-progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    text-align: center;
    min-width: 90px;
}

.zp-progress-step .step-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    background: var(--zp-gray-200);
    color: var(--zp-gray-500);
    transition: var(--zp-transition);
}

.zp-progress-step.completed .step-icon {
    background: var(--zp-success);
    color: #fff;
}

.zp-progress-step.active .step-icon {
    background: var(--zp-success);
    color: #fff;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
}

.zp-progress-step .step-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--zp-gray-500);
    white-space: nowrap;
}

.zp-progress-step.active .step-label {
    color: var(--zp-primary);
    font-weight: 600;
}

.zp-progress-step.completed .step-label {
    color: var(--zp-success);
}

.zp-progress-connector {
    flex: 1;
    height: 3px;
    background: var(--zp-gray-200);
    margin: 0 8px;
    margin-bottom: 24px;
    position: relative;
}

.zp-progress-connector.completed {
    background: var(--zp-success);
}

/* Countdown Timer */
.zp-countdown {
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--zp-radius-md);
    padding: 16px 20px;
    margin: 20px 0;
    text-align: center;
}

.zp-countdown .countdown-label {
    font-size: 13px;
    color: var(--zp-gray-600);
    margin-bottom: 8px;
}

.zp-countdown .countdown-timer {
    font-size: 32px;
    font-weight: 700;
    color: var(--zp-danger);
    font-family: "SF Mono", Monaco, monospace;
    letter-spacing: 2px;
}

.zp-countdown.expired {
    background: var(--zp-gray-100);
    border-color: var(--zp-gray-300);
}

.zp-countdown.expired .countdown-timer {
    color: var(--zp-gray-500);
    font-size: 18px;
}

/* Payment Submission Form */
.zp-proof-form {
    background: #fff;
    border: 1px solid var(--zp-gray-200);
    border-radius: var(--zp-radius-lg);
    padding: 28px;
    margin: 24px 0;
    box-shadow: var(--zp-shadow-sm);
}

.zp-proof-form h3 {
    margin: 0 0 20px 0;
    font-size: 18px;
    color: var(--zp-gray-800);
}

.zp-form-group {
    margin-bottom: 20px;
}

.zp-form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--zp-gray-700);
}

.zp-form-group label .required {
    color: var(--zp-danger);
    margin-left: 2px;
}

.zp-form-group input[type=text],
.zp-form-group input[type=file],
.zp-form-group textarea,
.zp-form-group select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--zp-gray-300);
    border-radius: var(--zp-radius-sm);
    font-size: 14px;
    transition: var(--zp-transition);
    background: #fff;
}

.zp-form-group input:focus,
.zp-form-group textarea:focus,
.zp-form-group select:focus {
    outline: none;
    border-color: var(--zp-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.zp-form-group .help-text {
    font-size: 12px;
    color: var(--zp-gray-500);
    margin-top: 4px;
}

.zp-file-drop {
    border: 2px dashed var(--zp-gray-300);
    border-radius: var(--zp-radius-md);
    padding: 32px;
    text-align: center;
    cursor: pointer;
    transition: var(--zp-transition);
    background: var(--zp-gray-50);
}

.zp-file-drop:hover,
.zp-file-drop.dragover {
    border-color: var(--zp-primary);
    background: #eff6ff;
}

.zp-file-drop .drop-icon {
    font-size: 36px;
    color: var(--zp-gray-400);
    margin-bottom: 10px;
}

.zp-file-drop .drop-text {
    font-size: 14px;
    color: var(--zp-gray-600);
    margin-bottom: 4px;
}

.zp-file-drop .drop-hint {
    font-size: 12px;
    color: var(--zp-gray-400);
}

/* Messages */
.zp-message {
    padding: 14px 18px;
    border-radius: var(--zp-radius-md);
    margin: 16px 0;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.zp-message.success {
    background: #dcfce7;
    border: 1px solid #86efac;
    color: #166534;
}

.zp-message.error {
    background: #fee2e2;
    border: 1px solid #fca5a5;
    color: #991b1b;
}

.zp-message.info {
    background: #dbeafe;
    border: 1px solid #93c5fd;
    color: #1e40af;
}

/* Order Details / My Account */
.zp-order-payment-info,
.zp-order-status-info {
    margin: 24px 0;
}

.zp-proof-history {
    margin-top: 20px;
}

.zp-proof-item {
    background: #fff;
    border: 1px solid var(--zp-gray-200);
    border-radius: var(--zp-radius-md);
    padding: 16px;
    margin-bottom: 12px;
}

.zp-proof-item .proof-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.zp-proof-item .proof-status {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.zp-proof-item .proof-status.pending { background: #fef3c7; color: #92400e; }
.zp-proof-item .proof-status.approved { background: #dcfce7; color: #166534; }
.zp-proof-item .proof-status.rejected { background: #fee2e2; color: #991b1b; }

/* Customer Dashboard */
.zeropay-customer-dashboard {
    max-width: 100%;
}

.zeropay-customer-dashboard .zeropay-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin-bottom: 30px;
}

.zeropay-stats .stat-item {
    background: #fff;
    border: 1px solid var(--zp-gray-200);
    padding: 20px;
    border-radius: var(--zp-radius-md);
    text-align: center;
}

.zeropay-stats .stat-value {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--zp-gray-800);
}

.zeropay-stats .stat-label {
    display: block;
    font-size: 13px;
    color: var(--zp-gray-500);
    margin-top: 6px;
}

/* Copy Button States */
.zp-btn.copied {
    background: var(--zp-success) !important;
    color: #fff !important;
}

/* Loading Spinner */
.zp-spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Bank Transfer Card */
.zp-bank-card {
    background: #fff;
    border: 1px solid var(--zp-gray-200);
    border-radius: var(--zp-radius-lg);
    padding: 24px;
    box-shadow: var(--zp-shadow-sm);
}

.zp-bank-card .zp-field {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--zp-gray-100);
}

.zp-bank-card .zp-field:last-child {
    border-bottom: none;
}

.zp-bank-card .zp-field-label {
    font-size: 13px;
    color: var(--zp-gray-500);
}

.zp-bank-card .zp-field-value {
    font-family: "SF Mono", Monaco, monospace;
    font-size: 14px;
    font-weight: 500;
    color: var(--zp-gray-800);
}

/* Responsive */
@media (max-width: 600px) {
    .zp-summary-grid {
        grid-template-columns: 1fr;
    }

    .zp-progress-tracker {
        padding: 12px;
    }

    .zp-progress-step {
        min-width: 70px;
    }

    .zp-progress-step .step-label {
        font-size: 10px;
    }

    .zp-upi-card {
        padding: 20px;
    }

    .zp-upi-pay-btn {
        width: 100%;
        min-width: unset;
    }

    .zp-upi-launch {
        padding: 16px;
    }

    .zp-copy-row {
        flex-direction: column;
    }

    .zp-copy-row .zp-btn {
        width: 100%;
    }
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    .zeropay-method-option {
        background: #1f2937;
        border-color: #374151;
    }

    .zeropay-method-option.active,
    .zeropay-method-option:has(input:checked) {
        background: linear-gradient(135deg, #1e3a5f 0%, #172554 100%);
        border-color: var(--zp-primary);
    }

    .method-name {
        color: #f3f4f6;
    }

    .method-desc {
        color: #9ca3af;
    }

    .method-discount {
        background: linear-gradient(135deg, #15803d 0%, #166534 100%);
    }

    .zeropay-gateway-desc {
        color: #9ca3af;
    }

    .zp-acknowledge {
        background: #1f2937;
        border-color: #374151;
    }

    .zp-acknowledge .ack-text {
        color: #9ca3af;
    }

    .zp-order-summary,
    .zp-proof-form,
    .zp-bank-card,
    .zeropay-stats .stat-item {
        background: #1f2937;
        border-color: #374151;
    }

    .zp-instructions,
    .zp-qr-section,
    .zp-file-drop {
        background: #1f2937;
    }
}