:root {
    --campaign-color-default: #ffc557;
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-bg: #f4f6f9;
    --color-surface: #ffffff;
    --color-text: #101828;
    --color-text-muted: #667085;
    --color-border: #e4e7ec;
    --color-danger: #dc2626;
    --color-danger-bg: #fef2f2;
    --color-success: #16a34a;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
    --shadow-md: 0 4px 16px rgba(16, 24, 40, 0.08);
    --shadow-lg: 0 12px 32px rgba(16, 24, 40, 0.12);
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 24px;
    --space-6: 32px;
    --space-7: 48px;
    --gutter: 20px;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --transition-fast: 0.18s ease;
    --transition-base: 0.32s cubic-bezier(0.22, 1, 0.36, 1);
    --tap-target: 50px;
}
.btn:focus-visible,
.gift-card:focus-visible,
.back-link:focus-visible,
.lang-switch__link:focus-visible,
.legal-page a:focus-visible,
.legal-footer a:focus-visible,
.form-privacy a:focus-visible {
    outline: 2px solid var(--color-text);
    outline-offset: 2px;
}
*, *::before, *::after {
    box-sizing: border-box;
}
html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    overflow-x: hidden;
}
body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}
h1, h2, h3, p {
    margin: 0;
}
a {
    color: inherit;
}
img {
    max-width: 100%;
    display: block;
}
button, input {
    font-family: inherit;
    font-size: 16px;
}
#app {
    min-height: 100vh;
    width: 100%;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}
.container {
    width: 100%;
    max-width: 640px;
    margin: 0 auto;
    padding: var(--space-5) var(--gutter);
}
.view {
    width: 100%;
    animation: view-enter var(--transition-base) both;
}
@keyframes view-enter {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
@media (prefers-reduced-motion: reduce) {
    .view {
        animation: none;
    }
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    width: 100%;
    min-height: var(--tap-target);
    padding: var(--space-3) var(--space-5);
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast),
        opacity var(--transition-fast), background-color var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}
.btn:active {
    transform: scale(0.96);
}
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}
.btn-primary {
    background-color: var(--campaign-color, var(--campaign-color-default));
    color: #ffffff;
    box-shadow: var(--shadow-sm);
}
.btn-primary:not(:disabled):hover {
    box-shadow: var(--shadow-md);
}
.btn-primary:not(:disabled):active {
    filter: brightness(0.88);
}
.btn-outline {
    background-color: transparent;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
}
.btn-outline:hover {
    background-color: var(--color-surface);
}
.btn-outline:active {
    background-color: var(--color-border);
}
.empty-state {
    text-align: center;
    color: var(--color-text-muted);
    padding: var(--space-7) var(--gutter);
}
.campaign-page {
    flex: 1;
    width: 100%;
    display: flex;
    flex-direction: column;
}
.campaign-banner {
    height: 110px;
    width: 100%;
    background-color: var(--campaign-color, var(--campaign-color-default));
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    padding: var(--gutter);
}
.lang-switch {
    order: 1;
    flex-shrink: 0;
    display: flex;
    gap: var(--space-2);
}
.lang-switch__link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 42px;
    min-height: 38px;
    padding: 0 var(--space-3);
    border-radius: var(--radius-sm);
    background-color: rgba(255, 255, 255, 0.3);
    color: #ffffff;
    font-size: 0.95rem;
    font-weight: 700;
    text-decoration: none;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    -webkit-tap-highlight-color: transparent;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}
.lang-switch__link:hover {
    background-color: rgba(255, 255, 255, 0.45);
}
.lang-switch__link.is-active {
    background-color: #ffffff;
    color: var(--campaign-color, var(--campaign-color-default));
    text-shadow: none;
}
.campaign-banner__name {
    flex: 1;
    min-width: 0;
    color: #ffffff;
    font-size: 1.3rem;
    font-weight: 700;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
}
.campaign-photo {
    width: 100%;
    max-height: 140px;
    aspect-ratio: 1950 / 481;
    overflow: hidden;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    background: repeating-linear-gradient(
        45deg,
        var(--color-border),
        var(--color-border) 6px,
        var(--color-bg) 6px,
        var(--color-bg) 12px
    );
}
.campaign-photo__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    opacity: 0;
    transition: opacity var(--transition-fast);
}
.campaign-photo__img.is-loaded {
    opacity: 1;
}
.campaign-intro {
    color: var(--color-text-muted);
    margin-top: var(--space-3);
}
.card {
    width: 100%;
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--space-5) var(--gutter);
    margin-top: var(--space-5);
}
.card h2 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--space-4);
}
.field {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
    width: 100%;
}
.field label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-muted);
}
.field input {
    width: 100%;
    min-height: var(--tap-target);
    font-size: 16px;
    padding: 0 var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background-color: var(--color-surface);
    color: var(--color-text);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.field input:focus {
    outline: none;
    border-color: var(--campaign-color, var(--campaign-color-default));
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--campaign-color, var(--campaign-color-default)) 20%, transparent);
}
.field input:invalid:not(:placeholder-shown) {
    border-color: var(--color-danger);
}
.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0 var(--space-4);
    width: 100%;
}
.error-message {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
    border-radius: var(--radius-sm);
    padding: var(--space-3) var(--space-4);
    font-size: 0.9rem;
    margin: var(--space-3) 0 var(--space-4);
}
.gift-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
    margin-top: var(--space-4);
}
.gift-card {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    width: 100%;
    min-height: var(--tap-target);
    background-color: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-3);
    cursor: pointer;
    text-align: left;
    -webkit-tap-highlight-color: transparent;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast),
        background-color var(--transition-fast), transform var(--transition-fast);
}
.gift-card:active {
    transform: scale(0.97);
    background-color: var(--color-bg);
}
.gift-card__thumb {
    flex-shrink: 0;
    width: 96px;
    height: 96px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: repeating-linear-gradient(
        45deg,
        var(--color-border),
        var(--color-border) 6px,
        var(--color-bg) 6px,
        var(--color-bg) 12px
    );
}
.gift-card__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    opacity: 0;
    transition: opacity var(--transition-fast);
}
.gift-card__img.is-loaded {
    opacity: 1;
}
.gift-card__name {
    font-weight: 600;
    font-size: 0.95rem;
}
.gift-card.is-selected {
    border-color: var(--campaign-color, var(--campaign-color-default));
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--campaign-color, var(--campaign-color-default)) 18%, transparent);
}
.gift-card__radio {
    margin-left: auto;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 2px solid var(--color-border);
    flex-shrink: 0;
    position: relative;
}
.gift-card.is-selected .gift-card__radio {
    border-color: var(--campaign-color, var(--campaign-color-default));
}
.gift-card.is-selected .gift-card__radio::after {
    content: "";
    position: absolute;
    inset: 3px;
    border-radius: 50%;
    background-color: var(--campaign-color, var(--campaign-color-default));
}
.confirmation {
    flex: 1;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-6) var(--gutter);
    gap: var(--space-3);
}
.confirmation__icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background-color: var(--color-success);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-size: 2rem;
    line-height: 1;
}
.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    color: var(--color-text-muted);
    font-size: 0.9rem;
    text-decoration: none;
    margin-bottom: var(--space-3);
    background: none;
    border: none;
    padding: var(--space-2) 0;
    cursor: pointer;
    min-height: var(--tap-target);
    -webkit-tap-highlight-color: transparent;
    transition: opacity var(--transition-fast);
}
.back-link:active {
    opacity: 0.55;
}
.campaign-banner--legal {
    justify-content: flex-end;
}
.legal-page {
    line-height: 1.65;
}
.legal-page h1 {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: var(--space-2);
}
.legal-page h2 {
    font-size: 1rem;
    font-weight: 700;
    margin-top: var(--space-5);
    margin-bottom: var(--space-2);
}
.legal-page p {
    color: var(--color-text);
    font-size: 0.95rem;
    margin-bottom: var(--space-3);
}
.legal-page a {
    color: var(--color-primary);
    text-decoration: underline;
}
.legal-updated {
    color: var(--color-text-muted);
    font-size: 0.85rem !important;
}
.legal-crosslink {
    margin-top: var(--space-5);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border);
}
.form-privacy {
    color: var(--color-text-muted);
    font-size: 0.8rem;
    line-height: 1.5;
    margin-bottom: var(--space-4);
}
.form-privacy a {
    color: var(--color-primary);
    text-decoration: underline;
}
.legal-footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    margin-top: var(--space-6);
    color: var(--color-text-muted);
    font-size: 0.8rem;
}
.legal-footer a {
    color: var(--color-text-muted);
    text-decoration: underline;
    padding: var(--space-2) 0;
}
@media (min-width: 640px) {
    .campaign-banner {
        height: 180px;
    }
    .form-row {
        grid-template-columns: 1fr 1fr;
    }
    .btn {
        width: auto;
    }
    .card form .btn {
        width: 100%;
    }
}