html, body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    margin: 0;
    min-height: 100%;
    background:
        radial-gradient(circle at top, rgba(255, 255, 255, 0.8), transparent 36%),
        linear-gradient(160deg, #f8d9e1 0%, #f7edf3 38%, #f6e3c9 100%);
}

body {
    min-height: 100vh;
}

a, .btn-link {
    color: #006bb7;
}

.btn-primary {
    color: #fff;
    background-color: #1b6ec2;
    border-color: #1861ac;
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

.content {
    padding-top: 1.1rem;
}

.birthday-scene {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 2rem;
}

.birthday-card {
    position: relative;
    display: grid;
    width: min(92vw, 28rem);
    border: 0;
    border-radius: 1.75rem;
    background: transparent;
    padding: 0;
    cursor: pointer;
    perspective: 1200px;
    box-shadow: 0 1.5rem 3.5rem rgba(102, 55, 47, 0.22);
    overflow: hidden;
}

.card-cover,
.card-inside {
    grid-area: 1 / 1;
    border-radius: 1.75rem;
    display: grid;
    place-items: center;
    padding: 2rem;
    text-align: center;
    backface-visibility: hidden;
    transition: transform 700ms cubic-bezier(0.2, 0.8, 0.2, 1), opacity 300ms ease;
}

.card-cover {
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.18), transparent 32%),
        linear-gradient(160deg, #c84f6f 0%, #f06d86 48%, #f7a4b8 100%);
    color: #fff8fb;
    border: 1px solid rgba(255, 255, 255, 0.35);
    transform-origin: left center;
    z-index: 2;
}

.card-kicker {
    position: absolute;
    top: 2rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.5rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    opacity: 0.92;
}

.card-cover h1,
.card-inside h2 {
    margin: 0;
    font-weight: 800;
    line-height: 1;
}

.card-cover h1 {
    font-size: clamp(2rem, 6vw, 3.5rem);
}

.card-cover p,
.card-inside p {
    margin: 0.75rem 0 0;
    font-size: 1.1rem;
}

.card-inside {
    background:
        radial-gradient(circle at top, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.88)),
        linear-gradient(180deg, #fff6eb 0%, #fff 100%);
    color: #694a3f;
    border: 1px solid rgba(145, 101, 85, 0.18);
    transform: rotateY(-180deg);
}

.card-inside h2 {
    color: #ba4d67;
    font-size: clamp(1.9rem, 5vw, 3rem);
}

.birthday-card.is-open .card-cover {
    transform: rotateY(-180deg);
}

.birthday-card.is-open .card-inside {
    transform: rotateY(0deg);
}

.birthday-card:focus-visible {
    outline: 0.25rem solid rgba(255, 255, 255, 0.95);
    outline-offset: 0.35rem;
}

@media (max-width: 520px) {
    .birthday-scene {
        padding: 1rem;
    }

    .birthday-card {
        width: 100%;
    }
}

h1:focus {
    outline: none;
}

.valid.modified:not([type=checkbox]) {
    outline: 1px solid #26b050;
}

.invalid {
    outline: 1px solid #e50000;
}

.validation-message {
    color: #e50000;
}

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

    .blazor-error-boundary::after {
        content: "An error has occurred."
    }

.darker-border-checkbox.form-check-input {
    border-color: #929292;
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
    text-align: start;
}