:root {
    --color-primary: #6d5bf5;
    --color-primary-dark: #5a48e0;
    --color-primary-light: #efeaff;
    --color-bg: #f4f5fb;
    --color-card: #ffffff;
    --color-text: #1f2333;
    --color-muted: #6b7080;
    --color-border: #e6e6f0;
    --color-success: #1fa971;
    --color-success-bg: #e7f9f1;
    --color-error: #e0455b;
    --color-error-bg: #fdeced;
    --color-warning: #d99a1f;
    --color-warning-bg: #fdf5e3;
    --radius-lg: 20px;
    --radius-md: 12px;
    --shadow-card: 0 20px 45px -20px rgba(60, 50, 150, 0.25);
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Vazirmatn', Tahoma, sans-serif;
    background: radial-gradient(circle at top left, #efeaff 0%, var(--color-bg) 45%);
    color: var(--color-text);
    min-height: 100vh;
    direction: rtl;
}

.test-banner {
    background: linear-gradient(90deg, #e0455b, #c93250);
    color: #fff;
    text-align: center;
    font-weight: 600;
    padding: 10px 16px;
    font-size: 14px;
    letter-spacing: 0.2px;
}

.page {
    min-height: calc(100vh - 42px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px 16px;
}

.card {
    width: 100%;
    max-width: 440px;
    background: var(--color-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: 32px 28px;
    animation: rise 0.35s ease;
}

@keyframes rise {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 24px;
}

.brand-icon {
    font-size: 22px;
}

/* --- فرم --- */
.payment-form {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.payment-form label {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-muted);
    margin-top: 12px;
}

.payment-form input {
    width: 100%;
    padding: 13px 14px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 15px;
    background: #fbfbfe;
    color: var(--color-text);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.payment-form input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px var(--color-primary-light);
    background: #fff;
}

.mono {
    font-family: 'Courier New', monospace;
    letter-spacing: 0.5px;
}

/* --- دکمه‌ها --- */
.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    border: none;
    border-radius: var(--radius-md);
    padding: 14px 16px;
    font-family: inherit;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    margin-top: 18px;
    transition: transform 0.1s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    box-shadow: 0 10px 20px -8px rgba(109, 91, 245, 0.55);
}

.btn-secondary {
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
}

.btn-link {
    background: transparent;
    color: var(--color-muted);
    margin-top: 10px;
    padding: 8px;
    font-weight: 600;
    font-size: 14px;
}

.btn:disabled,
.btn.is-loading {
    opacity: 0.75;
    cursor: not-allowed;
}

.btn .spinner {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2.5px solid rgba(255, 255, 255, 0.5);
    border-top-color: #fff;
    animation: spin 0.7s linear infinite;
}

.btn-secondary .spinner {
    border-color: rgba(90, 72, 224, 0.3);
    border-top-color: var(--color-primary-dark);
}

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

.btn.is-loading .btn-text::after {
    content: '...';
}

/* --- پیام‌ها --- */
.alert {
    padding: 12px 14px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
    line-height: 1.9;
}

.alert-error {
    background: var(--color-error-bg);
    color: var(--color-error);
}

/* --- نتیجه فاکتور --- */
.invoice-result {
    display: flex;
    flex-direction: column;
}

.invoice-id {
    font-size: 13px;
    color: var(--color-muted);
    text-align: center;
    margin: 0 0 16px;
}

.amount-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
    padding: 18px;
    text-align: center;
}

.amount-label {
    font-size: 13px;
    color: var(--color-primary-dark);
    font-weight: 600;
}

.amount-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--color-primary-dark);
}

.amount-value small {
    font-size: 15px;
    font-weight: 600;
}

.card-info {
    margin-top: 16px;
    border: 1.5px dashed var(--color-border);
    border-radius: var(--radius-md);
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.card-info-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 14px;
}

.card-info-row .label {
    color: var(--color-muted);
    font-weight: 600;
}

.copy-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 6px 10px;
    cursor: pointer;
    font-family: inherit;
    font-size: 14px;
    color: var(--color-text);
}

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

.countdown-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 16px;
    padding: 12px 14px;
    background: var(--color-warning-bg);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    color: var(--color-warning);
}

.countdown {
    font-family: 'Courier New', monospace;
    font-size: 16px;
    letter-spacing: 1px;
}

.countdown-expired {
    color: var(--color-error);
}

/* --- صفحه‌ی نتیجه‌ی callback --- */
.result-box {
    text-align: center;
    padding: 20px 10px 6px;
}

.result-icon {
    font-size: 48px;
    line-height: 1;
    margin-bottom: 12px;
}

.result-message {
    font-size: 16px;
    font-weight: 600;
    line-height: 1.9;
    margin: 0 0 8px;
}

.result-success .result-message { color: var(--color-success); }
.result-error .result-message { color: var(--color-error); }
.result-cancelled .result-message { color: var(--color-error); }
.result-pending .result-message,
.result-expired .result-message { color: var(--color-warning); }

/* --- ریسپانسیو --- */
@media (max-width: 480px) {
    .card {
        padding: 24px 18px;
        border-radius: 16px;
    }

    .amount-value {
        font-size: 24px;
    }
}