/* General Styles */
:root {
    --primary-color: #0066cc;
    --primary-hover: #0052a3;
    --danger-color: #dc3545;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --light-bg: #f8f9fa;
    --border-color: #dee2e6;
    --text-color: #333;
    --text-muted: #6c757d;
}

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

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
}

body {
    padding: 20px;
    min-height: 100vh;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

/* Card Styles */
.card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12), 0 4px 16px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border-color);
    padding: 40px;
    margin-bottom: 20px;
}

h1 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--text-color);
}

h2 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--text-color);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
}

h3 {
    font-size: 16px;
    margin-top: 15px;
    margin-bottom: 10px;
    color: var(--text-color);
}

p {
    margin-bottom: 10px;
    line-height: 1.6;
}

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

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

input[type="text"],
input[type="email"] {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.3s;
}

input[type="text"]:focus,
input[type="email"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-text {
    display: block;
    margin-top: 5px;
    font-size: 12px;
    color: var(--text-muted);
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    width: 100%;
}

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

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
    margin-bottom: 20px;
    width: auto;
}

.btn-secondary:hover {
    background-color: #5a6268;
}

/* Alert Styles */
.alert {
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 20px;
    border-left: 4px solid;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border-left-color: var(--danger-color);
}

/* Loading Styles */
.loading {
    text-align: center;
    padding: 40px;
}

.spinner {
    border: 4px solid var(--light-bg);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Statement Styles */
.statement-section {
    margin-bottom: 30px;
}

.field-group {
    margin-bottom: 15px;
}

.field-group label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.field-group p {
    margin: 0;
    font-size: 14px;
    color: var(--text-color);
    font-weight: 400;
}

.row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 15px;
}

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

.contract-header {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 10px;
    margin-bottom: 1rem;
}

.col {
    flex: 1;
}

.col p {
    margin-bottom: 12px;
}

.amount {
    font-weight: 600;
    color: var(--primary-color);
}

.contract-card {
    background-color: var(--light-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 20px;
    margin-bottom: 20px;
}

.contract-card h3 {
    margin-top: 0;
    color: var(--primary-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0px;
}

/* Payment Card Styles */
.payment-card {
    background-color: var(--light-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 15px;
    margin-bottom: 15px;
}

.payment-total {
    background-color: var(--light-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 15px;
}

.payment-email-row {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 1.5rem;
}

.payment-email-group {
    flex: 1 1 50%;
    min-width: 0;
}

.payment-email-group label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.payment-email-group input[type="email"] {
    width: 100%;
    max-width: none;
    padding: 8px 10px;
    border: 2px solid #ccc;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    line-height: 1.2;
    background-color: #fff;
}

.payment-email-group input[type="email"]:focus {
    border-color: #ccc;
    box-shadow: none;
    outline: none;
}

.payment-update-email-group {
    flex: 1 1 50%;
    display: flex;
    align-items: center;
    margin-bottom: 0;
    padding-top: 28px;
    padding-bottom: 0;
}

.payment-update-email-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0;
    font-weight: 400;
    cursor: pointer;
    white-space: nowrap;
}

.payment-update-email-label input[type="checkbox"] {
    width: auto;
    margin: 0;
    position: static;
    top: auto;
}

.payment-required-hint {
    color: var(--danger-color);
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 768px) {
    .card {
        padding: 20px;
    }

    h1 {
        font-size: 24px;
    }

    h2 {
        font-size: 18px;
    }

    .btn {
        padding: 10px 16px;
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }

    .card {
        padding: 15px;
    }

    .row {
        grid-template-columns: 1fr !important;
        gap: 10px;
    }

    .contract-header {
        grid-template-columns: 1fr;
    }

    h1 {
        font-size: 20px;
    }

    h2 {
        font-size: 16px;
    }

    input[type="text"],
    input[type="email"] {
        font-size: 16px; /* Prevents zoom on iOS */
    }

    .payment-email-row {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }

    .payment-email-group {
        min-width: 0;
    }

    .payment-update-email-group {
        padding-top: 0;
        padding-bottom: 0;
    }

    .payment-update-email-label {
        white-space: normal;
    }
}