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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f0f2f5;
    color: #333;
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    text-align: center;
    padding: 30px 0 20px;
}

.logo {
    max-width: 200px;
    height: auto;
    margin-bottom: 10px;
}

.header h1 {
    font-size: 1.5rem;
    color: #555;
    font-weight: 400;
}

/* Cards */
.card {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 30px;
    margin-bottom: 20px;
}

.card h2 {
    font-size: 1.25rem;
    margin-bottom: 20px;
    color: #333;
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: start;
}

/* Form */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 0.9rem;
    color: #444;
}

.form-group input[type="text"],
.form-group input[type="number"] {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: #25a8d4;
    box-shadow: 0 0 0 3px rgba(37, 168, 212, 0.15);
}

.input-row {
    display: flex;
    gap: 10px;
}

.input-row input {
    flex: 1;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: background-color 0.2s, opacity 0.2s;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background-color: #25a8d4;
    color: #fff;
}

.btn-primary:hover:not(:disabled) {
    background-color: #1e8fb5;
}

.btn-secondary {
    background-color: #6c757d;
    color: #fff;
    padding: 10px 18px;
}

.btn-secondary:hover:not(:disabled) {
    background-color: #5a6268;
}

#pay-btn {
    width: 100%;
    padding: 14px;
    font-size: 1.1rem;
    margin-top: 10px;
}

/* Status Messages */
.status-message {
    margin-top: 8px;
    font-size: 0.9rem;
    min-height: 24px;
}

.status-message.success {
    color: #28a745;
}

.status-message.error {
    color: #dc3545;
}

.status-message.loading {
    color: #6c757d;
}

/* Client Info */
.client-info {
    background: #e8f5e9;
    border: 1px solid #c8e6c9;
    border-radius: 6px;
    padding: 12px 16px;
    margin-bottom: 20px;
    font-weight: 500;
    color: #2e7d32;
}

/* Fee Breakdown */
.fee-breakdown {
    background: #f8f9fa;
    border: 1px solid #e9ecef;
    border-radius: 6px;
    padding: 16px;
    margin-top: 16px;
}

.fee-row {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
    font-size: 0.95rem;
}

.fee-total {
    border-top: 2px solid #dee2e6;
    margin-top: 8px;
    padding-top: 10px;
    font-weight: 700;
    font-size: 1.05rem;
    color: #25a8d4;
}

/* Reminders */
.reminders-list {
    list-style: none;
    padding: 0;
}

.reminders-list li {
    padding: 8px 0 8px 24px;
    position: relative;
    font-size: 0.9rem;
    color: #555;
    border-bottom: 1px solid #f0f0f0;
}

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

.reminders-list li::before {
    content: '\2022';
    color: #25a8d4;
    font-size: 1.2rem;
    position: absolute;
    left: 6px;
    top: 6px;
}

/* Result Pages */
.result-card {
    text-align: center;
    max-width: 500px;
    margin: 40px auto;
    padding: 40px;
}

.result-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2.5rem;
    font-weight: 700;
    color: #fff;
}

.success-icon {
    background-color: #28a745;
}

.cancel-icon {
    background-color: #ffc107;
    color: #333;
}

.error-icon {
    background-color: #dc3545;
}

.result-card h2 {
    margin-bottom: 12px;
}

.result-card p {
    color: #666;
    margin-bottom: 12px;
}

.result-card .btn {
    margin-top: 20px;
}

/* Hidden */
.hidden {
    display: none !important;
}

/* Payment fields animation */
.payment-fields {
    transition: opacity 0.3s ease;
}

/* Footer */
.footer {
    text-align: center;
    padding: 20px 0;
    color: #999;
    font-size: 0.8rem;
}

.footer p {
    margin: 4px 0;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 12px;
    }

    .content-grid {
        grid-template-columns: 1fr;
    }

    .card {
        padding: 20px;
    }

    .header {
        padding: 20px 0 10px;
    }

    .logo {
        max-width: 160px;
    }

    .header h1 {
        font-size: 1.2rem;
    }
}