/* paypal.css — Checkout CSS, Design-Tokens von karlkratz.de
   WCAG 3.0 konform, Dark Mode via prefers-color-scheme, Mobile-First */

/* === Base === */
html {
    font-family: var(--font-family-base);
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    line-height: var(--line-height-normal, 1.5);
    -webkit-text-size-adjust: 100%;
}

*, *::before, *::after {
    box-sizing: border-box;
}

/* === Skip-Link (WCAG: Keyboard Navigation) === */
.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 9999;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-primary);
    color: var(--color-text-on-primary, #fff);
    font-weight: 600;
}
.skip-link:focus {
    left: var(--space-md);
}

/* === Layout === */
.checkout-container {
    max-width: 600px;
    margin: 0 auto;
    padding: var(--space-lg) var(--space-md);
}
.checkout-header {
    text-align: center;
    margin-bottom: var(--space-lg);
}
.success-container {
    max-width: 600px;
    margin: 0 auto;
    padding: var(--space-lg) var(--space-md);
}
.error-container {
    max-width: 600px;
    margin: 0 auto;
    padding: var(--space-lg) var(--space-md);
    text-align: center;
}

/* === Form Layout === */
.form-row {
    margin-bottom: var(--space-md);
}

.form-row-half {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}
.form-row-half > .form-row {
    margin-bottom: 0;
}

@media (max-width: 480px) {
    .form-row-half {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }
}

/* === Form Elements (WCAG: min 44px touch targets, 4.5:1 contrast) === */
.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs, 0.25rem);
}

.form-input {
    display: block;
    width: 100%;
    min-height: 44px; /* WCAG: minimum touch target */
    padding: var(--space-sm) var(--space-md);
    border: 2px solid var(--color-border-medium);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-family: var(--font-family-base);
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    transition: border-color var(--transition-fast, 150ms ease), box-shadow var(--transition-fast, 150ms ease);
}
.form-input::placeholder {
    color: var(--color-text-tertiary, #999);
}
.form-input:focus {
    outline: 3px solid var(--color-primary);
    outline-offset: 1px;
    border-color: var(--color-primary);
}
.form-input:focus:not(:focus-visible) {
    outline: none;
}
.form-input:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 1px;
}

.form-input.has-error {
    border-color: var(--color-error);
}
.form-input.has-error:focus {
    outline-color: var(--color-error);
}

.form-error {
    font-size: var(--font-size-xs);
    color: var(--color-error);
    margin-top: var(--space-xs, 0.25rem);
    display: none;
}
.form-error[role="alert"] {
    display: block;
}
.form-input.has-error ~ .form-error {
    display: block;
}

.form-hint {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    margin-top: var(--space-xs, 0.25rem);
}

/* === Select (WCAG: consistent with inputs) === */
select.form-input {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23666' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-md) center;
    padding-right: calc(var(--space-md) * 2 + 12px);
}

/* === Product Card === */
.product-card {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    margin-bottom: var(--space-xl, 2rem);
}
.product-name {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-xs);
    color: var(--color-text-primary);
}
.product-price {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-top: var(--space-sm);
}
.product-cycle {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
}

/* === Status Banner (WCAG: role=alert) === */
.status-banner {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-md);
    display: none;
    font-weight: 500;
}
.status-banner.visible {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}
.status-banner.error {
    background: var(--color-error-bg, #fef2f2);
    color: var(--color-error, #b91c1c);
    border: 1px solid var(--color-error, #b91c1c);
}
.status-banner.warning {
    background: var(--color-warning-bg, #fffbeb);
    color: var(--color-warning-text, #92400e);
    border: 1px solid var(--color-warning, #f59e0b);
}
.status-banner.info {
    background: var(--color-info-bg, #eff6ff);
    color: var(--color-info, #1e40af);
    border: 1px solid var(--color-info, #3b82f6);
}

/* === Loading Overlay === */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: var(--color-bg-overlay, rgba(255, 255, 255, 0.92));
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: var(--z-index-modal, 1050);
}
.loading-overlay.visible { display: flex; }

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border-light);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-text {
    margin-top: var(--space-md);
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
}

/* === PayPal Buttons === */
.paypal-section {
    margin-top: var(--space-lg);
}
.paypal-skeleton {
    height: 55px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-lg);
    animation: pulse 1.5s ease-in-out infinite;
}
.paypal-skeleton.hidden { display: none; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }

/* === Success Page === */
.success-icon {
    font-size: 3rem;
    color: var(--color-success);
    margin-bottom: var(--space-md);
}
.success-card {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
}
.success-detail {
    display: flex;
    justify-content: space-between;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border-light);
    gap: var(--space-md);
}
.success-detail:last-child { border-bottom: none; }

.success-cta {
    display: block;
    width: 100%;
    min-height: 44px; /* WCAG */
    text-align: center;
    padding: var(--space-md);
    background: var(--color-primary);
    color: var(--color-text-on-primary, #fff);
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 600;
    margin-top: var(--space-lg);
    transition: background var(--transition-fast, 150ms ease);
}
.success-cta:hover { background: var(--color-primary-hover); }
.success-cta:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* === Dark Mode (via karlkratz.de design-tokens.css @media prefers-color-scheme) === */
@media (prefers-color-scheme: dark) {
    .form-input {
        background: var(--color-bg-secondary);
        color: var(--color-text-primary);
        border-color: var(--color-border-dark, #4a5568);
    }
    .form-input::placeholder {
        color: var(--color-text-tertiary);
    }
    select.form-input {
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23aaa' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
    }
    .loading-overlay {
        background: var(--color-bg-overlay, rgba(0, 0, 0, 0.85));
    }
    .status-banner.error {
        background: var(--color-error-bg, #450a0a);
        color: var(--color-error, #fca5a5);
    }
    .status-banner.warning {
        background: var(--color-warning-bg, #451a03);
        color: var(--color-warning-text, #fcd34d);
    }
    .status-banner.info {
        background: var(--color-info-bg, #1e1b4b);
        color: var(--color-info, #93c5fd);
    }
    .success-cta {
        color: var(--color-text-on-primary, #fff);
    }
}

/* === Reduced Motion (WCAG) === */
@media (prefers-reduced-motion: reduce) {
    .loading-spinner { animation: none; }
    .paypal-skeleton { animation: none; }
    * { transition-duration: 0.01ms !important; }
}