/* StudyKit QR tools: shared layout for the four generators and the scanner. */

.sk-qr {
    --qr-ink: #28323a;
    --qr-muted: #66727b;
    --qr-purple: #68438b;
    --qr-purple-dark: #452b61;
    --qr-line: #e5ddec;
    --qr-soft: #f8f4fa;
    --qr-error: #a4262c;
    --qr-warn: #8a5a00;
    --qr-ok: #1c6b3f;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(260px, 340px);
    gap: 28px;
    align-items: start;
    margin: 26px 0;
    color: var(--qr-ink);
    line-height: 1.6;
}

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

.sk-qr-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.sk-qr-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.sk-qr-field > label,
.sk-qr-control > label {
    font-size: .82rem;
    font-weight: 800;
    color: var(--qr-purple-dark);
    letter-spacing: .01em;
}

.sk-qr-hint {
    margin: 0;
    font-size: .84rem;
    color: var(--qr-muted);
}

.sk-qr-input,
.sk-qr-textarea,
.sk-qr-select {
    width: 100%;
    padding: 11px 13px;
    border: 1px solid #d8cfe2;
    border-radius: 10px;
    background: #fff;
    font: inherit;
    font-size: .95rem;
    color: var(--qr-ink);
}

.sk-qr-textarea {
    min-height: 132px;
    resize: vertical;
    line-height: 1.55;
}

.sk-qr-input:focus,
.sk-qr-textarea:focus,
.sk-qr-select:focus {
    outline: 2px solid var(--qr-purple);
    outline-offset: 1px;
    border-color: var(--qr-purple);
}

.sk-qr-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 14px;
}

.sk-qr-echo,
.sk-qr-problems,
.sk-qr-notice {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin: 0;
    padding: 10px 12px;
    border-radius: 10px;
    font-size: .84rem;
}

.sk-qr-echo {
    background: var(--qr-soft);
    border: 1px solid var(--qr-line);
    color: #55496b;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: .78rem;
    overflow-wrap: anywhere;
}

.sk-qr-problems {
    background: #fdf3f3;
    border: 1px solid #f0cfd1;
    color: var(--qr-error);
}

.sk-qr-notice {
    background: #fffaf0;
    border: 1px solid #f0e0bd;
    color: var(--qr-warn);
}

/* Counter and usage bar for the text generator. */

.sk-qr-counter {
    margin: 0;
    font-size: .84rem;
    color: var(--qr-muted);
}

.sk-qr-counter.is-error {
    color: var(--qr-error);
    font-weight: 700;
}

.sk-qr-bar {
    height: 6px;
    border-radius: 999px;
    background: #ece6f2;
    overflow: hidden;
}

.sk-qr-bar-fill {
    height: 100%;
    width: 0;
    border-radius: 999px;
    background: var(--qr-purple);
    transition: width .18s ease;
}

.sk-qr-bar-fill.is-warning {
    background: #c98a1b;
}

.sk-qr-bar-fill.is-over {
    background: var(--qr-error);
}

/* Settings block, generated by the shared engine. */

.sk-qr-controls {
    display: grid;
    gap: 14px;
    padding: 18px;
    border: 1px solid var(--qr-line);
    border-radius: 14px;
    background: var(--qr-soft);
}

.sk-qr-controls-title {
    margin: 0;
    font-size: .78rem;
    font-weight: 900;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--qr-purple);
}

.sk-qr-control {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.sk-qr-control output {
    font-weight: 400;
    color: var(--qr-muted);
}

.sk-qr-control-colors {
    display: grid;
    grid-template-columns: auto 1fr auto 1fr;
    align-items: center;
    gap: 8px 10px;
}

.sk-qr-control-colors input[type="color"] {
    width: 100%;
    min-width: 0;
    height: 38px;
    padding: 2px;
    border: 1px solid #d8cfe2;
    border-radius: 8px;
    background: #fff;
    cursor: pointer;
}

.sk-qr-control input[type="range"] {
    width: 100%;
    accent-color: var(--qr-purple);
}

/* Output column. */

.sk-qr-output {
    position: sticky;
    top: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 18px;
    border: 1px solid var(--qr-line);
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 12px 30px rgba(69, 43, 97, .08);
}

.sk-qr-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 240px;
    padding: 10px;
    border-radius: 12px;
    background: #fcfbfe;
    border: 1px dashed #ddd3e8;
}

.sk-qr-preview canvas {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    image-rendering: pixelated;
}

.sk-qr-placeholder {
    margin: 0;
    padding: 0 12px;
    text-align: center;
    color: var(--qr-muted);
    font-size: .88rem;
}

.sk-qr-status {
    margin: 0;
    min-height: 1.2em;
    font-size: .84rem;
    color: var(--qr-muted);
}

.sk-qr-status.is-ok {
    color: var(--qr-ok);
    font-weight: 700;
}

.sk-qr-status.is-warn {
    color: var(--qr-warn);
    font-weight: 700;
}

.sk-qr-status.is-error {
    color: var(--qr-error);
    font-weight: 700;
}

.sk-qr-facts {
    margin: 0;
    font-size: .76rem;
    color: var(--qr-muted);
    font-variant-numeric: tabular-nums;
}

.sk-qr-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.sk-qr-actions button,
.sk-qr-control-actions button,
.sk-qr-scanner-actions button,
.sk-qr-reveal {
    padding: 9px 14px;
    border: 1px solid var(--qr-purple);
    border-radius: 9px;
    background: var(--qr-purple);
    color: #fff;
    font: inherit;
    font-size: .84rem;
    font-weight: 800;
    cursor: pointer;
}

.sk-qr-actions button:hover:not(:disabled),
.sk-qr-scanner-actions button:hover:not(:disabled) {
    background: var(--qr-purple-dark);
    border-color: var(--qr-purple-dark);
}

.sk-qr-actions button:disabled,
.sk-qr-scanner-actions button:disabled {
    opacity: .45;
    cursor: not-allowed;
}

.sk-qr-control-actions button,
.sk-qr-reveal {
    background: #fff;
    color: var(--qr-purple-dark);
}

.sk-qr-control-actions button:hover {
    background: var(--qr-soft);
}

.sk-qr-reveal {
    align-self: flex-start;
    padding: 6px 11px;
    font-size: .78rem;
}

/* ------------------------------------------------------------------ scanner */

.sk-qr-scanner {
    --qr-ink: #28323a;
    --qr-muted: #66727b;
    --qr-purple: #68438b;
    --qr-purple-dark: #452b61;
    --qr-line: #e5ddec;
    --qr-soft: #f8f4fa;
    --qr-error: #a4262c;
    --qr-ok: #1c6b3f;
    margin: 26px 0;
    color: var(--qr-ink);
    line-height: 1.6;
}

.sk-qr-scanner *,
.sk-qr-scanner *::before,
.sk-qr-scanner *::after {
    box-sizing: border-box;
}

.sk-qr-stage {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    margin: 18px 0;
    border: 1px solid var(--qr-line);
    border-radius: 16px;
    background: #14121a;
    overflow: hidden;
}

.sk-qr-stage video {
    display: none;
    width: 100%;
    max-height: 60vh;
    object-fit: contain;
}

.sk-qr-stage[data-stage="scanning"] video,
.sk-qr-stage[data-stage="starting"] video {
    display: block;
}

.sk-qr-stage-idle {
    position: absolute;
    padding: 0 20px;
    text-align: center;
    color: #cfc7d8;
    font-size: .9rem;
}

.sk-qr-stage[data-stage="scanning"] .sk-qr-stage-idle,
.sk-qr-stage[data-stage="starting"] .sk-qr-stage-idle {
    display: none;
}

/* Finder guides, drawn over the video while scanning. */
.sk-qr-reticle {
    position: absolute;
    width: min(58%, 260px);
    aspect-ratio: 1;
    border: 3px solid rgba(255, 255, 255, .82);
    border-radius: 18px;
    box-shadow: 0 0 0 100vmax rgba(0, 0, 0, .28);
    pointer-events: none;
    display: none;
}

.sk-qr-stage[data-stage="scanning"] .sk-qr-reticle {
    display: block;
}

.sk-qr-scanner-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.sk-qr-file {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 14px;
    border: 1px dashed #c9bcd8;
    border-radius: 9px;
    background: var(--qr-soft);
    font-size: .84rem;
    font-weight: 700;
    color: var(--qr-purple-dark);
    cursor: pointer;
}

.sk-qr-file input[type="file"] {
    font-size: .78rem;
    max-width: 210px;
}

.sk-qr-result {
    margin-top: 18px;
    padding: 16px;
    border: 1px solid #cfe4d7;
    border-radius: 14px;
    background: #f3faf6;
}

.sk-qr-result-text {
    display: block;
    margin: 0 0 12px;
    padding: 11px 13px;
    border-radius: 9px;
    background: #fff;
    border: 1px solid #d8e8de;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: .82rem;
    overflow-wrap: anywhere;
}

.sk-qr-result-action {
    display: inline-block;
    margin: 0 8px 8px 0;
    padding: 9px 14px;
    border-radius: 9px;
    background: var(--qr-purple);
    color: #fff !important;
    font-size: .84rem;
    font-weight: 800;
    text-decoration: none;
}

.sk-qr-result-note {
    margin: 0 0 8px;
    font-size: .84rem;
    color: #3c5a4a;
}

/* --------------------------------------------------------------- responsive */

@media (max-width: 860px) {
    .sk-qr {
        grid-template-columns: minmax(0, 1fr);
    }

    .sk-qr-output {
        position: static;
    }
}

@media (max-width: 520px) {
    .sk-qr-control-colors {
        grid-template-columns: auto 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    .sk-qr-bar-fill {
        transition: none;
    }
}