/* ============================================================
   QR Studio — e-labs/qr-studio/styles.css

   Layout follows the shared E-Labs workbench ladder used by Gear3D,
   Cross-Section Studio and LEAPS:
     > 1180   three columns (left rail | stage | right rail)
     >= 720   control rail beside the stage, wide panel below
     <  720   single column with the STAGE FIRST, panels beneath

   720 is the phone/tablet line: the widest phone in portrait is ~430px and
   the iPad Mini is 744px, so nothing below the line is a tablet. Landscape
   phones are caught by max-height, never by width, because a phone on its
   side is up to ~930px wide.
   ============================================================ */

.QrStudio {
    --qs-bg: #eef2f4;
    --qs-bg2: #ffffff;
    --qs-panel: #ffffff;
    --qs-sunken: #f6f8f9;
    --qs-ink: #0f172a;
    --qs-ink-dim: #5b6b7c;
    --qs-line: #dde5ea;
    --qs-line-soft: #eaf0f3;
    --qs-accent: #18a9a8;
    --qs-accent-ink: #0d7f7e;
    --qs-accent-soft: rgba(24, 169, 168, 0.10);
    --qs-danger: #d1495b;
    --qs-warn: #c77d17;
    --qs-ok: #2f8f5b;
    --qs-shadow: 0 1px 2px rgba(15, 23, 42, 0.06), 0 8px 24px rgba(15, 23, 42, 0.06);
    --qs-radius: 12px;
}

[data-theme="dark"] .QrStudio {
    --qs-bg: #0d141c;
    --qs-bg2: #131c26;
    --qs-panel: #16202b;
    --qs-sunken: #101822;
    --qs-ink: #dfe7ee;
    --qs-ink-dim: #8ea0b2;
    --qs-line: #253340;
    --qs-line-soft: #1c2733;
    --qs-accent: #22d3d1;
    --qs-accent-ink: #22d3d1;
    --qs-accent-soft: rgba(34, 211, 209, 0.12);
    --qs-danger: #e06c7c;
    --qs-warn: #e0a444;
    --qs-ok: #4cb583;
    --qs-shadow: 0 1px 2px rgba(0, 0, 0, 0.30), 0 10px 28px rgba(0, 0, 0, 0.28);
}

/* App shell — matches the other E-Labs workbenches so the whole set frames
   the same way on a wide screen (Cross-Section Studio 1500, Gear3D 1620,
   LEAPS 1660). Without the cap this page ran the full width of #main and
   read as a different site. */
/* The `hidden` attribute only carries the UA's `display: none`, which any
   author `display` rule outranks. Much of this app is display:flex/block and
   is shown or hidden from script — without this the empty state, the second
   gradient color, the logo dropzone and its preview would all stay visible
   while script believed them hidden. Scoped, so it cannot leak site-wide. */
.QrStudio [hidden] { display: none !important; }

.qs-app {
    max-width: 1500px;
    margin: 0 auto;
    padding: 0 1rem 2rem;
    color: var(--qs-ink);
    font-size: 1rem;
    line-height: 1.55;
}

/* ---------------------------------------------------------- app header */

.qs-app .app-header { margin-bottom: 1.5rem; }
.qs-app .header-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.25rem;
}
.qs-app .header-badges { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.qs-app .header-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.7rem;
    font-size: 0.72rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border: 1px solid var(--qs-line);
    border-radius: 999px;
    color: var(--qs-ink-dim);
    background: var(--qs-panel);
}
.qs-app .header-content h1 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.4rem;
}
.qs-app .qs-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.4rem;
    height: 2.4rem;
    border-radius: 10px;
    background: var(--qs-accent-soft);
    color: var(--qs-accent-ink);
    font-size: 1.1rem;
}
.qs-app .header-content h1 .highlight { color: var(--qs-accent-ink); }
.qs-app .header-content p {
    color: var(--qs-ink-dim);
    max-width: 62ch;
    margin: 0;
}

/* ------------------------------------------------------------- studio */

.qs-studio {
    background: var(--qs-bg);
    border: 1px solid var(--qs-line);
    border-radius: 16px;
    padding: 0.85rem;
    /* sticky children need a non-hidden overflow; clip still rounds corners */
    overflow: clip;
}

/* ------------------------------------------------------------ toolbar */

.qs-toolbar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    padding: 0.5rem 0.6rem;
    margin-bottom: 0.85rem;
    background: var(--qs-panel);
    border: 1px solid var(--qs-line);
    border-radius: var(--qs-radius);
    box-shadow: var(--qs-shadow);
}
.qs-toolbar-group { display: flex; align-items: center; gap: 0.4rem; }
.qs-toolbar-group--end { margin-left: auto; }

/* ---------------------------------------------------------- workspace */

.qs-workspace {
    display: grid;
    grid-template-columns: 344px minmax(0, 1fr) 316px;
    grid-template-areas: "left stage right";
    gap: 0.85rem;
    align-items: start;
}
.qs-rail--left { grid-area: left; }
.qs-stage { grid-area: stage; }
.qs-rail--right { grid-area: right; }

.qs-rail {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
    min-width: 0;
}

/* -------------------------------------------------------------- panels */

.qs-panel {
    background: var(--qs-panel);
    border: 1px solid var(--qs-line);
    border-radius: var(--qs-radius);
    box-shadow: var(--qs-shadow);
    overflow: hidden;
}
.qs-panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.7rem 0.85rem;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    background: transparent;
    border: 0;
    cursor: pointer;
    text-align: left;
}
.qs-panel-head span { display: inline-flex; align-items: center; gap: 0.5rem; }
.qs-panel-head i:first-child { color: var(--qs-accent-ink); }
.qs-chev { transition: transform 0.18s ease; font-size: 0.7rem; opacity: 0.6; }
.qs-panel-head[aria-expanded="false"] .qs-chev { transform: rotate(-90deg); }
.qs-panel-body { padding: 0 0.85rem 0.85rem; }
.qs-panel-head[aria-expanded="false"] + .qs-panel-body { display: none; }

/* ---------------------------------------------------------------- tabs */

.qs-tabs {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    border-bottom: 1px solid var(--qs-line);
    background: var(--qs-sunken);
}
.qs-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.2rem;
    padding: 0.6rem 0.2rem;
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    background: transparent;
    border: 0;
    border-bottom: 2px solid transparent;
    color: var(--qs-ink-dim);
    cursor: pointer;
}
.qs-tab i { font-size: 0.85rem; }
.qs-tab.is-active { color: var(--qs-accent-ink); border-bottom-color: var(--qs-accent); background: var(--qs-panel); }
/* A dot marks a tab holding settings changed from the defaults, so nothing
   a user customized stays hidden behind an unopened tab. */
.qs-tab { position: relative; }
.qs-tab.is-changed::after {
    content: "";
    position: absolute;
    top: 6px;
    right: calc(50% - 18px);
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--qs-accent);
}
.qs-tabpane { display: none; padding: 0.85rem; }
.qs-tabpane.is-active { display: block; }

/* -------------------------------------------------------------- fields */

.qs-label {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--qs-ink-dim);
    margin: 0 0 0.45rem;
}
.qs-tabpane .qs-label:not(:first-child) { margin-top: 1rem; }

.qs-field { display: block; margin-bottom: 0.7rem; }
.qs-field > span {
    display: block;
    font-size: 0.74rem;
    font-weight: 600;
    color: var(--qs-ink-dim);
    margin-bottom: 0.28rem;
}
.qs-field > span b { color: var(--qs-ink); font-variant-numeric: tabular-nums; }
.qs-field--grow { flex: 1 1 0; min-width: 0; }

.QrStudio .qs-field input[type="text"],
.QrStudio .qs-field input[type="url"],
.QrStudio .qs-field input[type="tel"],
.QrStudio .qs-field input[type="email"],
.QrStudio .qs-field textarea,
.QrStudio .qs-field select {
    width: 100%;
    padding: 0.45rem 0.6rem;
    font-size: 0.86rem;
    color: var(--qs-ink);
    background: var(--qs-sunken);
    border: 1px solid var(--qs-line);
    border-radius: 8px;
    box-shadow: none;
    height: auto;
}
.QrStudio .qs-field textarea { resize: vertical; line-height: 1.45; }
.QrStudio .qs-field input:focus,
.QrStudio .qs-field textarea:focus,
.QrStudio .qs-field select:focus {
    border-color: var(--qs-accent);
    box-shadow: 0 0 0 3px var(--qs-accent-soft);
    outline: none;
}

.qs-row { display: flex; gap: 0.6rem; align-items: flex-end; }
.qs-row--split > * { min-width: 0; }

.qs-check {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.8rem;
    color: var(--qs-ink-dim);
    margin-bottom: 0.7rem;
    cursor: pointer;
}
.QrStudio .qs-check input[type="checkbox"] { width: auto; margin: 0; opacity: 1; }

.qs-hint {
    font-size: 0.72rem;
    line-height: 1.4;
    color: var(--qs-ink-dim);
    margin: 0.15rem 0 0.6rem;
}
.qs-hint.is-warn { color: var(--qs-warn); }

/* color inputs — swatch plus a hex field, so brand colors can be pasted */
.qs-color {
    display: flex;
    align-items: stretch;
    gap: 0;
    border: 1px solid var(--qs-line);
    border-radius: 8px;
    overflow: hidden;
    background: var(--qs-sunken);
}
.QrStudio .qs-color input[type="color"] {
    width: 34px;
    flex: none;
    border: 0;
    border-radius: 0;
    border-right: 1px solid var(--qs-line);
}
.QrStudio .qs-hexfield {
    flex: 1 1 auto;
    min-width: 0;
    width: 100%;
    padding: 0.3rem 0.45rem;
    font-size: 0.76rem;
    font-family: ui-monospace, Consolas, monospace;
    text-transform: lowercase;
    color: var(--qs-ink);
    background: transparent;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    height: auto;
}
.QrStudio .qs-hexfield:focus { outline: none; box-shadow: inset 0 0 0 2px var(--qs-accent-soft); }
.QrStudio .qs-hexfield.is-bad { color: var(--qs-danger); }
.qs-color:focus-within { border-color: var(--qs-accent); box-shadow: 0 0 0 3px var(--qs-accent-soft); }

.QrStudio input[type="color"] {
    width: 100%;
    height: 34px;
    padding: 2px;
    background: var(--qs-sunken);
    border: 1px solid var(--qs-line);
    border-radius: 8px;
    cursor: pointer;
}

/* quick palette */
.qs-palette {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin: -0.25rem 0 0.8rem;
}
.QrStudio .qs-chip {
    width: 20px;
    height: 20px;
    padding: 0;
    border: 1px solid var(--qs-line);
    border-radius: 5px;
    cursor: pointer;
    box-shadow: none;
    flex: none;
}
.QrStudio .qs-chip:hover { transform: scale(1.14); border-color: var(--qs-accent); }
.QrStudio .qs-swap { flex: none; align-self: flex-end; margin-bottom: 0.7rem; }
.qs-colorwrap { display: flex; flex-direction: column; gap: 0.25rem; }
.QrStudio .qs-linkbtn {
    background: none;
    border: 0;
    padding: 0;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--qs-accent-ink);
    cursor: pointer;
    text-align: left;
    height: auto;
    line-height: 1.2;
}
.QrStudio .qs-linkbtn--danger { color: var(--qs-danger); }
.QrStudio .qs-linkbtn.is-on { text-decoration: underline; }

/* --------------------------------------------------- segmented control */

.qs-seg {
    display: flex;
    flex-wrap: wrap;
    gap: 2px;
    padding: 3px;
    background: var(--qs-sunken);
    border: 1px solid var(--qs-line);
    border-radius: 9px;
    margin-bottom: 0.8rem;
}
.QrStudio .qs-seg-btn {
    flex: 1 1 auto;
    padding: 0.35rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--qs-ink-dim);
    background: transparent;
    border: 0;
    border-radius: 6px;
    cursor: pointer;
    height: auto;
    line-height: 1.4;
}
.QrStudio .qs-seg-btn.is-active {
    background: var(--qs-panel);
    color: var(--qs-accent-ink);
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.10);
}

/* ------------------------------------------------------- shape pickers */

.qs-swatches {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(66px, 1fr));
    gap: 0.4rem;
}
.QrStudio .qs-swatch {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.45rem 0.25rem 0.35rem;
    background: var(--qs-sunken);
    border: 1px solid var(--qs-line);
    border-radius: 9px;
    cursor: pointer;
    height: auto;
    color: var(--qs-ink-dim);
}
.QrStudio .qs-swatch:hover { border-color: var(--qs-accent); }
.QrStudio .qs-swatch.is-active {
    border-color: var(--qs-accent);
    background: var(--qs-accent-soft);
    color: var(--qs-accent-ink);
}
.qs-swatch svg { width: 34px; height: 34px; display: block; }
.qs-swatch svg path { fill: currentColor; }
.qs-swatch small {
    font-size: 0.6rem;
    line-height: 1.15;
    text-align: center;
    font-weight: 600;
    letter-spacing: 0.01em;
}
/* Shapes the scan harness measured as having less decode margin. The marker
   is informational, never a block — the shapes stay fully selectable. */
.QrStudio .qs-swatch { position: relative; }
.qs-swatch-flag {
    position: absolute;
    top: 3px;
    right: 3px;
    font-size: 0.58rem;
    line-height: 1;
}
.QrStudio .qs-swatch.is-caution .qs-swatch-flag { color: var(--qs-warn); }
.QrStudio .qs-swatch.is-risky .qs-swatch-flag { color: var(--qs-danger); }

.qs-swatches--eye { grid-template-columns: repeat(auto-fill, minmax(60px, 1fr)); }
.qs-swatches--frame { grid-template-columns: repeat(auto-fill, minmax(74px, 1fr)); }
.qs-swatches--frame .qs-swatch svg { width: 40px; height: 40px; }

/* ------------------------------------------------------------ logo drop */

.qs-drop {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    padding: 1.2rem 0.8rem;
    text-align: center;
    background: var(--qs-sunken);
    border: 1.5px dashed var(--qs-line);
    border-radius: 10px;
    cursor: pointer;
    color: var(--qs-ink-dim);
    transition: border-color 0.15s ease, background 0.15s ease;
}
.qs-drop:hover, .qs-drop:focus-visible, .qs-drop.is-over {
    border-color: var(--qs-accent);
    background: var(--qs-accent-soft);
    outline: none;
}
.qs-drop i { font-size: 1.4rem; color: var(--qs-accent-ink); }
.qs-drop p { margin: 0; font-size: 0.82rem; }
.qs-drop small { font-size: 0.68rem; opacity: 0.85; }

.qs-logo-preview {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.5rem;
    background: var(--qs-sunken);
    border: 1px solid var(--qs-line);
    border-radius: 10px;
    margin-bottom: 0.8rem;
}
.qs-logo-preview img {
    width: 44px;
    height: 44px;
    object-fit: contain;
    background: #fff;
    border-radius: 6px;
    border: 1px solid var(--qs-line);
}
.qs-logo-preview p {
    margin: 0;
    font-size: 0.78rem;
    font-weight: 600;
    word-break: break-all;
    line-height: 1.25;
}

/* --------------------------------------------------------------- stage */

.qs-stage {
    position: sticky;
    top: 0.85rem;
    background: var(--qs-panel);
    border: 1px solid var(--qs-line);
    border-radius: var(--qs-radius);
    box-shadow: var(--qs-shadow);
    padding: 1rem;
}
.qs-stage-inner { display: flex; flex-direction: column; align-items: center; gap: 0.7rem; }

.qs-canvas-wrap {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 1rem;
    border-radius: 10px;
    /* checkerboard so a transparent background is legible */
    background-color: var(--qs-sunken);
    background-image:
        linear-gradient(45deg, var(--qs-line-soft) 25%, transparent 25%),
        linear-gradient(-45deg, var(--qs-line-soft) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--qs-line-soft) 75%),
        linear-gradient(-45deg, transparent 75%, var(--qs-line-soft) 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0;
}
#qs-canvas {
    display: block;
    max-width: 100%;
    max-height: 62vh;
    max-height: 62dvh;
    height: auto;
    border-radius: 4px;
}

/* Shown instead of the meaningless symbol an empty payload would produce. */
.qs-empty {
    position: absolute;
    inset: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    text-align: center;
    padding: 1.5rem;
    border-radius: 10px;
    background: var(--qs-panel);
    border: 1.5px dashed var(--qs-line);
    color: var(--qs-ink-dim);
}
.qs-empty i { font-size: 1.7rem; color: var(--qs-line); }
.qs-empty p { margin: 0; font-size: 0.9rem; }
.qs-empty b { color: var(--qs-ink); }
.qs-empty small { font-size: 0.76rem; }

.qs-print-hint { padding-top: 0.1rem; border-top: 1px dashed var(--qs-line-soft); margin-top: 0.5rem; }

.qs-stage-meta {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    justify-content: center;
}
.qs-stage-meta span {
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--qs-ink-dim);
    background: var(--qs-sunken);
    border: 1px solid var(--qs-line);
    border-radius: 999px;
    padding: 0.22rem 0.6rem;
}
.qs-stage-error {
    margin: 0;
    padding: 0.6rem 0.8rem;
    width: 100%;
    font-size: 0.82rem;
    color: var(--qs-danger);
    background: rgba(209, 73, 91, 0.08);
    border: 1px solid rgba(209, 73, 91, 0.28);
    border-radius: 8px;
    text-align: center;
}

/* --------------------------------------------------------- readability */

.qs-score { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.6rem; }
.qs-score-ring { position: relative; width: 52px; height: 52px; flex: none; }
.qs-score-ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.qs-score-ring circle { fill: none; stroke-width: 4; }
.qs-ring-bg { stroke: var(--qs-line); }
.qs-ring-fg {
    stroke: var(--qs-ok);
    stroke-linecap: round;
    stroke-dasharray: 119.4;
    stroke-dashoffset: 119.4;
    transition: stroke-dashoffset 0.35s ease, stroke 0.25s ease;
}
.qs-score-ring b {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-variant-numeric: tabular-nums;
}
.qs-score-text p { margin: 0; font-size: 0.86rem; font-weight: 700; }
.qs-score-text small { font-size: 0.72rem; color: var(--qs-ink-dim); }

.qs-issues { list-style: none; margin: 0 0 0.7rem; padding: 0; }
.qs-issues li {
    display: flex;
    gap: 0.45rem;
    font-size: 0.75rem;
    line-height: 1.4;
    padding: 0.4rem 0.5rem;
    border-radius: 7px;
    margin-bottom: 0.3rem;
    background: var(--qs-sunken);
}
.qs-issues li::before { font-family: "Font Awesome 5 Free"; font-weight: 900; flex: none; }
.qs-issues li.is-error { color: var(--qs-danger); }
.qs-issues li.is-error::before { content: "\f06a"; }
.qs-issues li.is-warn { color: var(--qs-warn); }
.qs-issues li.is-warn::before { content: "\f071"; }
.qs-issues li.is-ok { color: var(--qs-ok); }
.qs-issues li.is-ok::before { content: "\f058"; }

.qs-verify-out {
    margin: 0.55rem 0 0;
    padding: 0.5rem 0.6rem;
    font-size: 0.76rem;
    line-height: 1.4;
    border-radius: 8px;
    background: var(--qs-sunken);
    word-break: break-all;
}
.qs-verify-out.is-ok { color: var(--qs-ok); background: rgba(47, 143, 91, 0.10); }
.qs-verify-out.is-bad { color: var(--qs-danger); background: rgba(209, 73, 91, 0.10); }

/* ------------------------------------------------------------ presets */

.qs-presets { display: grid; grid-template-columns: repeat(auto-fill, minmax(78px, 1fr)); gap: 0.45rem; }
.QrStudio .qs-preset {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
    padding: 0.4rem 0.25rem;
    background: var(--qs-sunken);
    border: 1px solid var(--qs-line);
    border-radius: 9px;
    cursor: pointer;
    height: auto;
    color: var(--qs-ink-dim);
}
.QrStudio .qs-preset:hover { border-color: var(--qs-accent); }
.QrStudio .qs-preset.is-active { border-color: var(--qs-accent); background: var(--qs-accent-soft); color: var(--qs-accent-ink); }
.qs-preset canvas, .qs-preset img { width: 100%; max-width: 62px; height: auto; border-radius: 5px; display: block; }
.qs-preset small { font-size: 0.6rem; font-weight: 600; text-align: center; line-height: 1.15; }

/* ------------------------------------------------------------- export */

.qs-export-actions { display: flex; flex-direction: column; gap: 0.45rem; }

/* -------------------------------------------------------------- about */

.qs-about {
    margin-top: 0.85rem;
    padding: 0.9rem 1rem;
    background: var(--qs-panel);
    border: 1px solid var(--qs-line);
    border-radius: var(--qs-radius);
}
.qs-about p { margin: 0; font-size: 0.82rem; line-height: 1.6; color: var(--qs-ink-dim); }
.qs-about b { color: var(--qs-ink); }

/* -------------------------------------------------------------- toasts */

.qs-toast-wrap {
    position: fixed;
    bottom: 1.2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 12000;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    align-items: center;
    pointer-events: none;
}
.qs-toast {
    padding: 0.55rem 1rem;
    font-size: 0.82rem;
    font-weight: 600;
    color: #fff;
    background: #1f2937;
    border-radius: 999px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.28);
    animation: qs-toast-in 0.2s ease;
}
.qs-toast.is-bad { background: var(--qs-danger); }
.qs-toast.is-ok { background: var(--qs-ok); }
@keyframes qs-toast-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ============================================================
   Range inputs

   A styled slider is only as tall as its track (a few px here), which is
   nearly impossible to catch with a thumb. Grow the input to a real grab
   area and move the visible track to the pseudo-elements, so it looks
   identical but is actually hittable.
   ============================================================ */

.QrStudio input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 22px;
    margin: 0;
    padding: 0;
    background: transparent;
    border: 0;
    cursor: pointer;
}
.QrStudio input[type="range"]::-webkit-slider-runnable-track {
    height: 4px;
    border-radius: 999px;
    background: var(--qs-line);
}
.QrStudio input[type="range"]::-moz-range-track {
    height: 4px;
    border-radius: 999px;
    background: var(--qs-line);
}
.QrStudio input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 15px;
    height: 15px;
    margin-top: -5.5px;
    border-radius: 50%;
    background: var(--qs-accent);
    border: 2px solid var(--qs-panel);
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.3);
}
.QrStudio input[type="range"]::-moz-range-thumb {
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: var(--qs-accent);
    border: 2px solid var(--qs-panel);
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.3);
}
.QrStudio input[type="range"]:focus-visible::-webkit-slider-thumb { box-shadow: 0 0 0 4px var(--qs-accent-soft); }

/* ============================================================
   Responsive ladder
   ============================================================ */

@media screen and (max-width: 1180px) {
    .qs-workspace {
        grid-template-columns: 320px minmax(0, 1fr);
        grid-template-areas:
            "left stage"
            "right right";
    }
    .qs-rail--right {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
        align-items: start;
    }
}

@media screen and (max-width: 980px) {
    .qs-workspace { grid-template-columns: 290px minmax(0, 1fr); }
}

/* Phones — stage first, then the controls. */
@media screen and (max-width: 719px) {
    .qs-studio { padding: 0.6rem; }
    .qs-workspace {
        grid-template-columns: minmax(0, 1fr);
        grid-template-areas:
            "stage"
            "left"
            "right";
    }
    .qs-stage { position: static; padding: 0.75rem; }
    .qs-rail--right { grid-template-columns: minmax(0, 1fr); }
    #qs-canvas { max-height: 48vh; max-height: 48dvh; }
    .qs-toolbar-group--end { margin-left: 0; }
    .qs-toolbar { justify-content: space-between; }
    .qs-tab span { display: none; }
    .qs-tab i { font-size: 1rem; }
    .qs-tab { padding: 0.7rem 0.2rem; }
}

/* Landscape phones: keyed to height, never width. */
@media screen and (max-height: 500px) and (orientation: landscape) {
    #qs-canvas { max-height: 70vh; max-height: 70dvh; }
    .qs-app .app-header { margin-bottom: 0.8rem; }
    .qs-app .header-content p { display: none; }
}

/* Touch sizing hangs off pointer type, not width: a touch laptop gets it,
   a narrow desktop window does not. */
@media (pointer: coarse) {
    .QrStudio .qs-btn { min-height: 44px; }
    .QrStudio .qs-seg-btn,
    .QrStudio .qs-swatch,
    .QrStudio .qs-preset { min-height: 40px; }
    .QrStudio .qs-field input[type="text"],
    .QrStudio .qs-field input[type="url"],
    .QrStudio .qs-field input[type="tel"],
    .QrStudio .qs-field input[type="email"],
    .QrStudio .qs-field select { min-height: 40px; }
    .QrStudio .qs-color input[type="color"] { height: 40px; width: 40px; }
    .QrStudio .qs-hexfield { min-height: 40px; }
    .qs-panel-head { min-height: 44px; }
    /* A slider's grab area is its input height, not its track. Grow it on
       touch and let the pseudo-element track keep the same slim look. */
    .QrStudio input[type="range"] { height: 40px; }
    .QrStudio input[type="range"]::-webkit-slider-thumb { width: 20px; height: 20px; margin-top: -8px; }
    .QrStudio input[type="range"]::-moz-range-thumb { width: 20px; height: 20px; }
    .QrStudio .qs-chip { width: 28px; height: 28px; }
}

@media (prefers-reduced-motion: reduce) {
    .QrStudio *, .QrStudio *::before, .QrStudio *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================================
   Button overrides

   The site-wide stylesheet styles every <button> with a teal background and
   `color: #fff !important`, which would swamp every control in here. Each
   button class in this app needs an entry in this block.
   ============================================================ */

.QrStudio .qs-btn,
.QrStudio .qs-seg-btn,
.QrStudio .qs-swatch,
.QrStudio .qs-preset,
.QrStudio .qs-tab,
.QrStudio .qs-panel-head,
.QrStudio .qs-linkbtn,
.QrStudio .qs-chip,
.QrStudio .qs-drop {
    font-family: inherit;
    text-transform: none;
    letter-spacing: normal;
    box-shadow: none;
}

/* One visible focus treatment for every control in the app. */
.QrStudio .qs-btn:focus-visible,
.QrStudio .qs-seg-btn:focus-visible,
.QrStudio .qs-swatch:focus-visible,
.QrStudio .qs-preset:focus-visible,
.QrStudio .qs-tab:focus-visible,
.QrStudio .qs-panel-head:focus-visible,
.QrStudio .qs-linkbtn:focus-visible,
.QrStudio .qs-chip:focus-visible {
    outline: 2px solid var(--qs-accent);
    outline-offset: 2px;
}

.QrStudio .qs-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.42rem 0.8rem;
    height: auto;
    line-height: 1.4;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--qs-ink) !important;
    background: var(--qs-sunken);
    border: 1px solid var(--qs-line);
    border-radius: 8px;
    cursor: pointer;
    white-space: nowrap;
}
.QrStudio .qs-btn i { color: var(--qs-ink-dim); font-size: 0.85rem; }
.QrStudio .qs-btn:hover:not(:disabled) { border-color: var(--qs-accent); color: var(--qs-accent-ink) !important; }
.QrStudio .qs-btn:hover:not(:disabled) i { color: var(--qs-accent-ink); }
.QrStudio .qs-btn:disabled { opacity: 0.42; cursor: not-allowed; }
.QrStudio .qs-btn--icon { padding: 0.42rem 0.6rem; }
.QrStudio .qs-btn--wide { width: 100%; }
.QrStudio .qs-btn--grow { flex: 1 1 0; }
.QrStudio .qs-btn--primary {
    color: #fff !important;
    background: var(--qs-accent);
    border-color: var(--qs-accent);
}
.QrStudio .qs-btn--primary i { color: #fff; }
.QrStudio .qs-btn--primary:hover:not(:disabled) {
    color: #fff !important;
    filter: brightness(1.06);
    border-color: var(--qs-accent);
}
.QrStudio .qs-btn--primary:hover:not(:disabled) i { color: #fff; }

.QrStudio .qs-seg-btn,
.QrStudio .qs-swatch,
.QrStudio .qs-preset,
.QrStudio .qs-tab,
.QrStudio .qs-panel-head,
.QrStudio .qs-linkbtn {
    background-color: transparent;
}
.QrStudio .qs-swatch,
.QrStudio .qs-preset { background-color: var(--qs-sunken); }
.QrStudio .qs-panel-head { color: var(--qs-ink) !important; }
.QrStudio .qs-tab { color: var(--qs-ink-dim) !important; }
.QrStudio .qs-tab.is-active { color: var(--qs-accent-ink) !important; }
.QrStudio .qs-seg-btn { color: var(--qs-ink-dim) !important; }
.QrStudio .qs-seg-btn.is-active { color: var(--qs-accent-ink) !important; }
.QrStudio .qs-swatch { color: var(--qs-ink-dim) !important; }
.QrStudio .qs-swatch.is-active { color: var(--qs-accent-ink) !important; }
.QrStudio .qs-preset { color: var(--qs-ink-dim) !important; }
.QrStudio .qs-preset.is-active { color: var(--qs-accent-ink) !important; }
.QrStudio .qs-linkbtn { color: var(--qs-accent-ink) !important; }
.QrStudio .qs-linkbtn--danger { color: var(--qs-danger) !important; }
.QrStudio .qs-drop { color: var(--qs-ink-dim) !important; }
/* Chips carry their color as an inline background; the site-wide button rule
   would otherwise paint them all teal. */
.QrStudio .qs-chip { color: transparent !important; transition: transform 0.12s ease; }