:root {
    --qr-navy: #002060;
    --qr-ink: #18212a;
    --qr-muted: #5b6770;
    --qr-line: rgba(0, 32, 96, 0.12);
    --qr-teal: #0bb697;
    --qr-magenta: #be0078;
}

html, body {
    margin: 0;
    min-height: 100%;
    background: #fff;
    color: var(--qr-ink);
    font-family: "Plus Jakarta Sans", ui-sans-serif, system-ui, sans-serif;
}

.qr-app {
    min-height: 100dvh;
    display: grid;
    place-items: center;
    padding: 1.1rem 1rem 1.4rem;
    box-sizing: border-box;
}

.qr-app__card {
    width: min(34rem, 100%);
    display: grid;
    justify-items: center;
    gap: 1rem;
}

.qr-app__title {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--qr-navy);
    text-align: center;
}

.qr-app__image-wrap {
    width: 100%;
    aspect-ratio: 1;
    display: grid;
    place-items: center;
    background: #fff;
    border: 1px solid var(--qr-line);
    border-radius: 1.15rem;
    overflow: hidden;
    box-shadow: 0 18px 40px rgba(0, 32, 96, 0.08);
}

.qr-app__image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    background: #fff;
}

.qr-app__actions {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.65rem;
}

.qr-app__btn {
    appearance: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.85rem;
    padding: 0.55rem 0.85rem;
    border-radius: 0.75rem;
    border: 1px solid var(--qr-line);
    background: #fff;
    color: var(--qr-navy);
    font: inherit;
    font-size: 0.92rem;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
}

.qr-app__btn--primary {
    grid-column: 1 / -1;
    color: #fff;
    background: linear-gradient(180deg, #d0188a, #be0078);
    border-color: transparent;
}

.qr-app__btn--install {
    grid-column: 1 / -1;
    background: var(--qr-navy);
    color: #fff;
    border-color: var(--qr-navy);
}

.qr-app__btn[hidden] { display: none; }

.qr-app__hint {
    margin: 0;
    text-align: center;
    color: var(--qr-muted);
    font-size: 0.82rem;
    line-height: 1.45;
}

.qr-app__viewer {
    position: fixed;
    inset: 0;
    z-index: 40;
    display: grid;
    place-items: center;
    padding: 1rem;
    background: rgba(0, 20, 48, 0.92);
}

.qr-app__viewer[hidden] { display: none; }

.qr-app__viewer img {
    width: min(92vw, 92vh);
    height: auto;
    max-height: 92vh;
    object-fit: contain;
    background: #fff;
    border-radius: 0.75rem;
}

.qr-app__close {
    position: absolute;
    top: 0.85rem;
    right: 0.85rem;
    min-width: 2.6rem;
    min-height: 2.6rem;
    border: 0;
    border-radius: 999px;
    background: #fff;
    color: var(--qr-navy);
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

@media (display-mode: standalone) {
    .qr-app { padding-top: max(1.1rem, env(safe-area-inset-top)); }
}