/**
 * KiliSmile Payments - Frontend CSS
 * Modern payment form styles for optimal user experience
 */

/* ===== CSS VARIABLES ===== */
:root {
    --ksp-primary: #2c5282;
    --ksp-primary-light: #3182ce;
    --ksp-primary-dark: #1a365d;
    --ksp-secondary: #38a169;
    --ksp-success: #48bb78;
    --ksp-warning: #ed8936;
    --ksp-error: #e53e3e;
    --ksp-info: #4299e1;
    --ksp-gray-50: #f7fafc;
    --ksp-gray-100: #edf2f7;
    --ksp-gray-200: #e2e8f0;
    --ksp-gray-300: #cbd5e0;
    --ksp-gray-400: #a0aec0;
    --ksp-gray-500: #718096;
    --ksp-gray-600: #4a5568;
    --ksp-gray-700: #2d3748;
    --ksp-gray-800: #1a202c;
    --ksp-gray-900: #171923;
    --ksp-white: #ffffff;
    --ksp-shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --ksp-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --ksp-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --ksp-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --ksp-radius: 8px;
    --ksp-radius-lg: 12px;
    --ksp-radius-xl: 16px;
    --ksp-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --ksp-font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

/* ===== PAYMENT FORM CONTAINER ===== */
.kilismile-payment-form {
    font-family: var(--ksp-font-sans);
    max-width: 500px;
    margin: 2rem auto;
    background: var(--ksp-white);
    border-radius: var(--ksp-radius-xl);
    box-shadow: var(--ksp-shadow-xl);
    overflow: hidden;
    border: 1px solid var(--ksp-gray-200);
}

.payment-form-header {
    background: linear-gradient(135deg, var(--ksp-primary), var(--ksp-primary-light));
    color: var(--ksp-white);
    padding: 2rem;
    text-align: center;
    position: relative;
}

.payment-form-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.1"/><circle cx="10" cy="50" r="0.5" fill="white" opacity="0.1"/><circle cx="90" cy="30" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.payment-form-title {
    margin: 0 0 0.5rem 0;
    font-size: 1.75rem;
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.payment-form-subtitle {
    margin: 0;
    opacity: 0.9;
    font-size: 1rem;
    position: relative;
    z-index: 1;
}

.payment-form-body {
    padding: 2rem;
}

/* ===== STEP INDICATOR ===== */
.payment-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
    padding: 0 1rem;
}

.payment-step {
    display: flex;
    align-items: center;
    flex: 1;
    position: relative;
}

.step-circle {
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 600;
    background: var(--ksp-gray-200);
    color: var(--ksp-gray-500);
    transition: var(--ksp-transition);
    position: relative;
    z-index: 2;
}

.payment-step.active .step-circle {
    background: var(--ksp-primary);
    color: var(--ksp-white);
    transform: scale(1.1);
}

.payment-step.completed .step-circle {
    background: var(--ksp-success);
    color: var(--ksp-white);
}

.step-line {
    flex: 1;
    height: 2px;
    background: var(--ksp-gray-200);
    margin: 0 0.5rem;
    transition: var(--ksp-transition);
}

.payment-step.completed .step-line {
    background: var(--ksp-success);
}

.step-label {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--ksp-gray-600);
    margin-top: 0.5rem;
    white-space: nowrap;
}

/* ===== FORM SECTIONS ===== */
.form-section {
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--ksp-transition);
}

.form-section.active {
    opacity: 1;
    transform: translateY(0);
}

.section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--ksp-gray-800);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-title::before {
    content: '';
    width: 4px;
    height: 1.25rem;
    background: linear-gradient(135deg, var(--ksp-primary), var(--ksp-secondary));
    border-radius: 2px;
}

/* ===== FORM FIELDS ===== */
.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--ksp-gray-700);
    margin-bottom: 0.5rem;
}

.form-label.required::after {
    content: ' *';
    color: var(--ksp-error);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--ksp-gray-200);
    border-radius: var(--ksp-radius);
    font-size: 1rem;
    line-height: 1.5;
    transition: var(--ksp-transition);
    background: var(--ksp-white);
    color: var(--ksp-gray-800);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--ksp-primary);
    box-shadow: 0 0 0 3px rgba(44, 82, 130, 0.1);
    transform: translateY(-2px);
}

.form-input.error,
.form-select.error {
    border-color: var(--ksp-error);
    box-shadow: 0 0 0 3px rgba(229, 62, 62, 0.1);
}

.form-input.success,
.form-select.success {
    border-color: var(--ksp-success);
    box-shadow: 0 0 0 3px rgba(72, 187, 120, 0.1);
}

.form-help {
    font-size: 0.75rem;
    color: var(--ksp-gray-500);
    margin-top: 0.25rem;
}

.form-error {
    font-size: 0.75rem;
    color: var(--ksp-error);
    margin-top: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.form-error::before {
    content: '⚠️';
    font-size: 0.75rem;
}

/* ===== AMOUNT SECTION ===== */
.amount-section {
    background: var(--ksp-gray-50);
    border-radius: var(--ksp-radius-lg);
    padding: 1.5rem;
    margin-bottom: 2rem;
    border: 2px solid var(--ksp-gray-100);
}

.amount-input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.currency-symbol {
    position: absolute;
    left: 1rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--ksp-gray-600);
    z-index: 2;
}

.amount-input {
    padding-left: 3rem;
    font-size: 1.5rem;
    font-weight: 600;
    text-align: center;
    background: var(--ksp-white);
    border: 2px solid var(--ksp-gray-200);
}

.amount-presets {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    margin-top: 1rem;
}

.amount-preset {
    padding: 0.75rem;
    border: 2px solid var(--ksp-gray-200);
    border-radius: var(--ksp-radius);
    background: var(--ksp-white);
    text-align: center;
    cursor: pointer;
    transition: var(--ksp-transition);
    font-weight: 500;
}

.amount-preset:hover {
    border-color: var(--ksp-primary);
    background: var(--ksp-primary);
    color: var(--ksp-white);
    transform: translateY(-2px);
}

.amount-preset.selected {
    border-color: var(--ksp-primary);
    background: var(--ksp-primary);
    color: var(--ksp-white);
}

.currency-converter {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--ksp-info);
    background: linear-gradient(135deg, rgba(66, 153, 225, 0.1), rgba(66, 153, 225, 0.05));
    border-radius: var(--ksp-radius);
    text-align: center;
    font-size: 0.875rem;
    color: var(--ksp-gray-700);
}

/* ===== GATEWAY SELECTION ===== */
.gateway-selection {
    display: grid;
    gap: 1rem;
    margin-bottom: 2rem;
}

.gateway-option {
    border: 2px solid var(--ksp-gray-200);
    border-radius: var(--ksp-radius-lg);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--ksp-transition);
    background: var(--ksp-white);
    position: relative;
    overflow: hidden;
}

.gateway-option::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--ksp-primary), var(--ksp-secondary));
    transform: scaleX(0);
    transition: var(--ksp-transition);
}

.gateway-option:hover {
    border-color: var(--ksp-primary);
    box-shadow: var(--ksp-shadow-md);
    transform: translateY(-2px);
}

.gateway-option:hover::before {
    transform: scaleX(1);
}

.gateway-option.selected {
    border-color: var(--ksp-primary);
    background: rgba(44, 82, 130, 0.02);
}

.gateway-option.selected::before {
    transform: scaleX(1);
}

.gateway-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.gateway-icon {
    width: 3rem;
    height: 3rem;
    border-radius: var(--ksp-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: var(--ksp-gray-100);
    color: var(--ksp-gray-600);
}

.gateway-icon.azampay {
    background: linear-gradient(135deg, #00b4d8, #0077b6);
    color: var(--ksp-white);
}

.gateway-icon.paypal {
    background: linear-gradient(135deg, #0070ba, #003087);
    color: var(--ksp-white);
}

.gateway-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--ksp-gray-800);
    margin: 0;
}

.gateway-description {
    font-size: 0.875rem;
    color: var(--ksp-gray-600);
    margin: 0;
}

/* ===== MOBILE MONEY OPTIONS ===== */
.mobile-money-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 1rem;
}

.mobile-money-option {
    border: 2px solid var(--ksp-gray-200);
    border-radius: var(--ksp-radius);
    padding: 1rem;
    text-align: center;
    cursor: pointer;
    transition: var(--ksp-transition);
    background: var(--ksp-white);
}

.mobile-money-option:hover {
    border-color: var(--ksp-primary);
    background: var(--ksp-primary);
    color: var(--ksp-white);
}

.mobile-money-option.selected {
    border-color: var(--ksp-primary);
    background: var(--ksp-primary);
    color: var(--ksp-white);
}

.mobile-money-logo {
    width: 2rem;
    height: 2rem;
    margin: 0 auto 0.5rem;
    background: var(--ksp-gray-200);
    border-radius: var(--ksp-radius);
}

.mobile-money-name {
    font-size: 0.875rem;
    font-weight: 500;
}

/* ===== PHONE NUMBER INPUT ===== */
.phone-input-group {
    display: flex;
    gap: 0.5rem;
}

.country-code {
    flex-shrink: 0;
    width: 5rem;
    text-align: center;
    background: var(--ksp-gray-100);
    color: var(--ksp-gray-700);
    font-weight: 600;
}

.phone-input {
    flex: 1;
}

/* ===== SECURITY INDICATORS ===== */
.security-indicators {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--ksp-gray-50);
    border-radius: var(--ksp-radius);
    margin-bottom: 1.5rem;
}

.security-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--ksp-gray-600);
}

.security-icon {
    color: var(--ksp-success);
    font-size: 1rem;
}

/* ===== PAYMENT BUTTONS ===== */
.payment-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.btn {
    flex: 1;
    padding: 0.875rem 2rem;
    border-radius: var(--ksp-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--ksp-transition);
    border: 2px solid transparent;
    text-align: center;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--ksp-primary), var(--ksp-primary-light));
    color: var(--ksp-white);
    border-color: var(--ksp-primary);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--ksp-primary-dark), var(--ksp-primary));
    transform: translateY(-2px);
    box-shadow: var(--ksp-shadow-lg);
}

.btn-secondary {
    background: var(--ksp-white);
    color: var(--ksp-gray-700);
    border-color: var(--ksp-gray-300);
}

.btn-secondary:hover {
    background: var(--ksp-gray-50);
    border-color: var(--ksp-gray-400);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn.loading {
    pointer-events: none;
}

.btn.loading::after {
    content: '';
    width: 1rem;
    height: 1rem;
    border: 2px solid currentColor;
    border-top-color: transparent;
    border-radius: 50%;
    animation: ksp-spin 1s linear infinite;
    margin-left: 0.5rem;
}

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

/* ===== DONATION SUMMARY ===== */
.donation-summary {
    background: var(--ksp-gray-50);
    border: 2px solid var(--ksp-gray-100);
    border-radius: var(--ksp-radius-lg);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.summary-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--ksp-gray-800);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.summary-title::before {
    content: '📋';
    font-size: 1rem;
}

.summary-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--ksp-gray-200);
}

.summary-item:last-child {
    border-bottom: none;
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--ksp-gray-800);
}

.summary-label {
    color: var(--ksp-gray-600);
}

.summary-value {
    font-weight: 500;
    color: var(--ksp-gray-800);
}

/* ===== PROGRESS INDICATORS ===== */
.payment-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--ksp-gray-200);
    z-index: 1000;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--ksp-primary), var(--ksp-secondary));
    width: 0;
    transition: width 0.3s ease;
}

/* ===== SUCCESS/ERROR STATES ===== */
.payment-result {
    text-align: center;
    padding: 2rem;
}

.result-icon {
    width: 4rem;
    height: 4rem;
    margin: 0 auto 1rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.result-icon.success {
    background: var(--ksp-success);
    color: var(--ksp-white);
}

.result-icon.error {
    background: var(--ksp-error);
    color: var(--ksp-white);
}

.result-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.result-title.success {
    color: var(--ksp-success);
}

.result-title.error {
    color: var(--ksp-error);
}

.result-message {
    color: var(--ksp-gray-600);
    margin-bottom: 2rem;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .kilismile-payment-form {
        margin: 1rem;
        max-width: none;
        border-radius: var(--ksp-radius-lg);
    }
    
    .payment-form-header {
        padding: 1.5rem;
    }
    
    .payment-form-title {
        font-size: 1.5rem;
    }
    
    .payment-form-body {
        padding: 1.5rem;
    }
    
    .payment-steps {
        margin-bottom: 1.5rem;
    }
    
    .step-label {
        display: none;
    }
    
    .amount-presets {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .mobile-money-options {
        grid-template-columns: 1fr;
    }
    
    .payment-actions {
        flex-direction: column;
    }
    
    .phone-input-group {
        flex-direction: column;
    }
    
    .country-code {
        width: 100%;
    }
    
    .security-indicators {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .kilismile-payment-form {
        margin: 0.5rem;
    }
    
    .payment-form-header {
        padding: 1rem;
    }
    
    .payment-form-body {
        padding: 1rem;
    }
    
    .amount-input {
        font-size: 1.25rem;
    }
    
    .amount-presets {
        grid-template-columns: 1fr;
    }
    
    .gateway-option {
        padding: 1rem;
    }
}

/* ===== ACCESSIBILITY ENHANCEMENTS ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ===== HIGH CONTRAST MODE ===== */
@media (prefers-contrast: high) {
    :root {
        --ksp-primary: #000080;
        --ksp-success: #006400;
        --ksp-error: #8B0000;
        --ksp-warning: #B8860B;
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    .kilismile-payment-form {
        box-shadow: none;
        border: 1px solid #000;
    }
    
    .payment-actions,
    .gateway-selection {
        display: none;
    }
}

/* ===== DARK MODE SUPPORT ===== */
@media (prefers-color-scheme: dark) {
    :root {
        --ksp-white: #1a202c;
        --ksp-gray-50: #2d3748;
        --ksp-gray-100: #4a5568;
        --ksp-gray-200: #718096;
        --ksp-gray-300: #a0aec0;
        --ksp-gray-600: #e2e8f0;
        --ksp-gray-700: #f7fafc;
        --ksp-gray-800: #ffffff;
    }
}