.qr-decoder-shell {
    --qr-bg: #0b1020;
    --qr-card: rgba(255, 255, 255, .97);
    --qr-ink: #111827;
    --qr-muted: #64748b;
    --qr-line: rgba(148, 163, 184, .28);
    --qr-accent: #8b5cf6;
    --qr-accent-2: #22d3ee;
    --qr-good: #16a34a;
    --qr-bad: #dc2626;
    max-width: 980px;
    margin: 0 auto;
    padding: clamp(1rem, 2.6vw, 2rem);
    color: var(--qr-ink);
}

.qr-decoder-shell [hidden] {
    display: none !important;
}

.qr-decoder-card,
.qr-result,
.qr-status {
    margin-top: 1rem;
    border: 1px solid var(--qr-line);
    border-radius: 1.4rem;
    background: var(--qr-card);
    box-shadow: 0 20px 52px rgba(15, 23, 42, .12);
}

.qr-decoder-card {
    margin-top: 0;
}

.qr-decoder-tabs {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    overflow: hidden;
    border-radius: 1.4rem 1.4rem 0 0;
    background: #f1f5f9;
}

.qr-decoder-tab {
    border: 0;
    padding: 1.15rem 1rem;
    background: transparent;
    color: var(--qr-ink);
    cursor: pointer;
    font: inherit;
    font-weight: 900;
    font-size: clamp(.92rem, 1.7vw, 1.1rem);
}

.qr-decoder-tab.is-active {
    background: linear-gradient(135deg, var(--qr-accent), #a855f7);
    color: #fff;
}

.qr-decoder-panel {
    padding: clamp(1rem, 3vw, 1.8rem);
}

.qr-dropzone {
    min-height: 220px;
    display: grid;
    place-items: center;
    gap: .35rem;
    text-align: center;
    border: 2px dashed rgba(139, 92, 246, .44);
    border-radius: 1.2rem;
    background:
        linear-gradient(135deg, rgba(139, 92, 246, .08), rgba(34, 211, 238, .06)),
        #fff;
    cursor: pointer;
    transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.qr-dropzone:hover,
.qr-dropzone.is-dragover {
    transform: translateY(-1px);
    border-color: rgba(139, 92, 246, .82);
    box-shadow: 0 18px 42px rgba(139, 92, 246, .18);
}

.qr-dropzone input {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
}

.qr-dropzone__icon {
    color: var(--qr-accent);
}

.qr-dropzone strong {
    font-size: clamp(1.35rem, 3vw, 2.1rem);
    line-height: 1;
}

.qr-dropzone span:not(.qr-dropzone__icon) {
    color: var(--qr-muted);
    font-size: 1rem;
}

.qr-preview,
.qr-generated {
    margin-top: 1rem;
    border: 1px solid var(--qr-line);
    border-radius: 1rem;
    background: #fff;
}

.qr-preview {
    display: grid;
    place-items: center;
    padding: 1rem;
}

.qr-preview img {
    max-width: min(360px, 100%);
    max-height: 360px;
    object-fit: contain;
    border-radius: .6rem;
}

.qr-url-box label {
    display: block;
    margin-bottom: .55rem;
    font-size: .9rem;
    font-weight: 900;
    color: #334155;
}

.qr-url-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: .75rem;
}

.qr-url-row input {
    min-height: 3.25rem;
    border: 1px solid var(--qr-line);
    border-radius: 1rem;
    padding: 0 1rem;
    font: inherit;
    color: var(--qr-ink);
    background: #fff;
    outline: none;
}

.qr-url-row input:focus {
    border-color: rgba(139, 92, 246, .72);
    box-shadow: 0 0 0 4px rgba(139, 92, 246, .12);
}

.qr-url-box p {
    margin: .6rem 0 0;
    color: var(--qr-muted);
}

.qr-decoder-btn,
.qr-copy-btn {
    border: 0;
    border-radius: 1rem;
    min-height: 3.25rem;
    padding: 0 1.25rem;
    background: linear-gradient(135deg, var(--qr-accent), #a855f7);
    color: #fff;
    cursor: pointer;
    font: inherit;
    font-weight: 900;
    box-shadow: 0 12px 30px rgba(139, 92, 246, .26);
}

.qr-decoder-btn {
    margin-top: 1rem;
}

.qr-url-row .qr-decoder-btn {
    margin-top: 0;
}

.qr-decoder-btn:disabled,
.qr-copy-btn:disabled {
    opacity: .5;
    cursor: not-allowed;
    box-shadow: none;
}

.qr-generated {
    display: grid;
    grid-template-columns: minmax(190px, 280px) minmax(0, 1fr);
    gap: 1rem;
    padding: 1rem;
    align-items: center;
}

.qr-generated__image-wrap {
    display: grid;
    place-items: center;
    padding: .75rem;
    border-radius: .9rem;
    background: linear-gradient(135deg, rgba(139, 92, 246, .08), rgba(34, 211, 238, .07));
}

.qr-generated img {
    width: min(240px, 100%);
    height: auto;
    display: block;
    image-rendering: pixelated;
}

.qr-generated__meta pre {
    margin: .4rem 0 0;
    padding: .85rem;
    white-space: pre-wrap;
    word-break: break-word;
    border-radius: .9rem;
    background: #f8fafc;
    color: #0f172a;
    font-family: Consolas, Monaco, 'Courier New', monospace;
}

.qr-generated__actions {
    display: flex;
    flex-wrap: wrap;
    gap: .85rem;
    align-items: center;
    margin-top: .85rem;
}

.qr-download-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-top: 0;
    text-decoration: none;
}

.qr-result {
    padding: clamp(1rem, 3vw, 1.5rem);
}

.qr-result__head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: .9rem;
}

.qr-result__label {
    margin: 0;
    color: var(--qr-good);
    font-size: .82rem;
    font-weight: 900;
    letter-spacing: .1em;
    text-transform: uppercase;
}

.qr-result h3 {
    margin: .2rem 0 0;
    font-size: 1.2rem;
}

.qr-result pre {
    margin: 0;
    padding: 1rem;
    white-space: pre-wrap;
    word-break: break-word;
    border-radius: 1rem;
    background: #0f172a;
    color: #f8fafc;
    font-family: Consolas, Monaco, 'Courier New', monospace;
    font-size: .98rem;
    line-height: 1.55;
}

.qr-open-link {
    display: inline-flex;
    margin-top: .85rem;
    color: var(--qr-accent);
    font-weight: 900;
    text-decoration: none;
}

.qr-status {
    padding: .9rem 1rem;
    color: var(--qr-muted);
    font-weight: 700;
}

.qr-status.is-error {
    color: var(--qr-bad);
    border-color: rgba(220, 38, 38, .28);
    background: rgba(254, 242, 242, .96);
}

.qr-status.is-success {
    color: var(--qr-good);
    border-color: rgba(22, 163, 74, .25);
    background: rgba(240, 253, 244, .96);
}

@media (max-width: 720px) {
    .qr-decoder-shell {
        padding-inline: .75rem;
    }

    .qr-decoder-tabs,
    .qr-url-row,
    .qr-generated {
        grid-template-columns: 1fr;
    }

    .qr-result__head {
        align-items: stretch;
        flex-direction: column;
    }

    .qr-copy-btn,
    .qr-url-row .qr-decoder-btn,
    .qr-download-link {
        width: 100%;
    }

    .qr-generated__actions {
        align-items: stretch;
        flex-direction: column;
    }
}