/* ==========================================================================
   BLACKHOLE QR STUDIO
   Standalone browser-first QR tool.
   ========================================================================== */

.qr-tool-page {
    --qr-reveal-clip-margin: clamp(16px, 3.5vw, 48px);

    min-height: 100vh;
    overflow-x: hidden;
    background: #010206;
    color: var(--text-main);
}

.qr-tool-header,
.qr-studio,
.qr-tool-footer {
    width: min(calc(100% - clamp(32px, 7vw, 96px)), 1300px);
    margin-inline: auto;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.qr-tool-header {
    position: absolute;
    top: 0;
    left: 50%;
    z-index: var(--z-header);
    min-height: 104px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    padding-top: var(--space-md);
    transform: translateX(-50%);
    background: transparent;
}

.qr-tool-logo {
    display: inline-flex;
    align-items: center;
    width: clamp(172px, 18vw, 238px);
    color: var(--primary-white);
}

.qr-tool-logo img {
    display: block;
    width: 100%;
    height: auto;
}

.qr-tool-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

.qr-tool-nav-action,
.qr-tool-nav-action .btn-glass {
    --btn-glass-margin-top: 0;
    --btn-glass-min-width: 176px;
}

.qr-tool-nav-action .btn-glass a {
    font-size: 0.86rem;
}

/* --------------------------------------------------------------------------
   Page shell
   -------------------------------------------------------------------------- */

.qr-studio {
    position: relative;
    z-index: var(--z-base);
}

/* Keep lateral entrances within the page gutters without clipping the hero. */
.qr-workspace,
.qr-faq {
    overflow-x: clip;
    overflow-clip-margin: var(--qr-reveal-clip-margin);
}

.qr-tool-page .section-tag {
    justify-content: center;
    max-width: min(100%, 780px);
    text-align: center;
    white-space: normal;
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.qr-hero {
    position: relative;
    width: 100vw;
    min-height: 86vh;
    min-height: 86svh;
    margin-left: calc(50% - 50vw);
    display: grid;
    place-items: center;
    padding: clamp(108px, 12vh, 136px) clamp(24px, 6vw, 96px) clamp(88px, 11vh, 132px);
    overflow: hidden;
    isolation: isolate;
    background: #010206;
}

.qr-hero::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -2px;
    z-index: 3;
    height: clamp(220px, 30vh, 340px);
    background:
        linear-gradient(180deg, transparent 0%, rgba(1, 2, 6, 0.72) 52%, #010206 100%);
    pointer-events: none;
}

.qr-hero-media,
.qr-hero-vignette,
.qr-hero-stars {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.qr-hero-media {
    inset: -2px;
    z-index: 0;
    background-image: url("../../images/tools/hero-qr-blackhole.webp");
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
    opacity: 0.72;
    transform: translate3d(0, 0, 0);
}

.qr-hero-media::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 50% 48%, rgba(var(--primary-blue-rgb), 0.1), transparent 34%),
        linear-gradient(180deg, rgba(1, 2, 6, 0.02), rgba(1, 2, 6, 0.38) 70%, rgba(1, 2, 6, 0.9));
}

.qr-hero-vignette {
    z-index: 1;
    background:
        radial-gradient(ellipse at 50% 48%, rgba(1, 2, 6, 0.02) 0 24%, rgba(1, 2, 6, 0.25) 58%, rgba(1, 2, 6, 0.92) 100%),
        linear-gradient(90deg, rgba(1, 2, 6, 0.92), rgba(1, 2, 6, 0.12) 50%, rgba(1, 2, 6, 0.92));
}

.qr-hero-stars {
    z-index: 2;
    opacity: 0.78;
}

.qr-hero-stars .star {
    background: var(--white-alpha-80);
    box-shadow: 0 0 8px var(--white-alpha-50);
}

.qr-hero-content {
    position: relative;
    z-index: 4;
    width: min(100%, 900px);
    display: grid;
    justify-items: center;
    text-align: center;
}

.qr-hero-signal-pill {
    --signal-pill-accent: var(--primary-blue);
    --signal-pill-font-size: 0.74rem;
    --signal-pill-letter-spacing: 0.08em;
    margin-bottom: var(--space-md);
}

.qr-hero-title {
    max-width: 760px;
    margin: 0;
    font-size: clamp(3.35rem, 5.8vw, 4.8rem);
    line-height: 1.08;
}

.qr-hero p {
    max-width: 700px;
    margin: var(--space-md) auto 0;
    color: rgba(237, 242, 255, 0.86);
    font-size: clamp(1rem, 1.35vw, 1.12rem);
    line-height: 1.62;
    text-shadow: 0 12px 30px var(--black-alpha-80);
}

.qr-hero p strong,
.qr-promise p strong,
.qr-faq-heading p strong,
.qr-faq-answer strong {
    color: var(--primary-white);
    font-weight: 600;
}

.qr-hero-proof {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 12px;
    margin: var(--space-lg) 0 0;
    padding: 0;
    list-style: none;
    color: var(--text-muted);
    font-size: 0.88rem;
}

.qr-hero-proof li {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 38px;
    padding: 8px 15px;
    border: 1px solid var(--glass-border-light);
    border-radius: var(--border-radius-pill);
    background: rgba(2, 3, 5, 0.58);
    -webkit-backdrop-filter: var(--glass-blur-sm);
    backdrop-filter: var(--glass-blur-sm);
}

.qr-hero-proof i {
    color: var(--accent-purple);
    font-size: 1rem;
    line-height: 1;
    filter: drop-shadow(0 0 5px rgba(var(--accent-purple-rgb), 0.42));
    animation: qrProofIconGlow 3s ease-in-out infinite;
}

.qr-hero-proof li:nth-child(2) i {
    animation-delay: 0.4s;
}

.qr-hero-proof li:nth-child(3) i {
    animation-delay: 0.8s;
}

.qr-hero.is-qr-hero-paused .qr-hero-proof i {
    animation-play-state: paused;
}

/* --------------------------------------------------------------------------
   Shared QR sections
   -------------------------------------------------------------------------- */

.qr-system,
.qr-promise,
.qr-faq {
    position: relative;
    z-index: var(--z-base);
}

.qr-system {
    padding-top: clamp(70px, 8vw, 112px);
}

.qr-system::before {
    content: "";
    position: absolute;
    left: 50%;
    top: clamp(280px, 28vw, 420px);
    z-index: -1;
    width: min(1120px, 86vw);
    height: min(780px, 62vw);
    border-radius: var(--border-radius-circle);
    background:
        radial-gradient(circle at 28% 36%, rgba(var(--primary-blue-rgb), 0.2), transparent 36%),
        radial-gradient(circle at 74% 58%, rgba(var(--accent-purple-rgb), 0.16), transparent 38%),
        radial-gradient(circle at 52% 82%, rgba(var(--primary-blue-rgb), 0.12), transparent 44%);
    filter: blur(42px);
    opacity: 0.86;
    transform: translateX(-50%);
    pointer-events: none;
}

.qr-system-heading {
    width: min(100%, 880px);
    margin: 0 auto clamp(38px, 5vw, 62px);
    text-align: center;
}

.qr-system-heading .section-tag {
    margin-bottom: var(--space-md);
}

.qr-system-heading .section-heading {
    margin: 0;
    font-size: clamp(2.55rem, 4.8vw, 3.75rem);
    line-height: 1.12;
}

.qr-system-heading .bh-section-copy {
    max-width: 760px;
    margin: var(--space-md) auto 0;
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.7;
}

.qr-panel-label,
.qr-builder-block-label,
.qr-faq-heading > .section-tag {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    color: var(--primary-blue);
    font-family: var(--font-code);
    font-size: 0.73rem;
    line-height: 1.2;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.qr-workspace {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(340px, 0.92fr);
    gap: clamp(20px, 2.5vw, 32px);
    align-items: start;
    isolation: isolate;
}

.qr-panel {
    position: relative;
    z-index: var(--z-base);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--border-radius-xl);
    background:
        linear-gradient(180deg, rgba(4, 6, 12, 0.88), rgba(1, 2, 6, 0.94));
    -webkit-backdrop-filter: var(--glass-blur-lg) saturate(1.08);
    backdrop-filter: var(--glass-blur-lg) saturate(1.08);
    box-shadow:
        0 28px 70px var(--black-alpha-45),
        inset 0 1px 0 var(--white-alpha-08);
}

.qr-panel::before,
.qr-faq-item::before {
    content: "";
    position: absolute;
    inset: 0;
    padding: var(--glass-rim-width-subtle);
    border-radius: inherit;
    background: var(--glass-rim);
    opacity: 0.58;
    pointer-events: none;
    -webkit-mask:
        linear-gradient(#000 0 0) content-box,
        linear-gradient(#000 0 0);
    mask:
        linear-gradient(#000 0 0) content-box,
        linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
}

.qr-panel > *,
.qr-faq-item > * {
    position: relative;
    z-index: var(--z-above);
}

.qr-panel {
    padding: clamp(26px, 3vw, 40px);
}

.qr-panel-heading {
    display: flex;
    align-items: start;
    justify-content: space-between;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.qr-panel-heading h3 {
    margin: 8px 0 0;
    font-family: var(--font-display);
    font-size: clamp(2rem, 3vw, 2.65rem);
    font-weight: 520;
    line-height: 1;
    letter-spacing: 0;
    color: transparent;
    background: var(--gradient-metallic);
    background-size: 100% 1.15em;
    background-repeat: repeat-y;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0px 2px 3px var(--black-alpha-50));
    padding-bottom: 0.08em;
}

.qr-panel-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 34px;
    padding: 8px 14px;
    border: 1px solid var(--purple-alpha-25);
    border-radius: var(--border-radius-pill);
    background: var(--purple-alpha-10);
    color: var(--primary-white);
    font-family: var(--font-code);
    font-size: 0.72rem;
    line-height: 1;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.qr-panel-status::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: var(--border-radius-circle);
    background: var(--accent-purple);
    box-shadow: 0 0 12px rgba(var(--accent-purple-rgb), 0.5);
}

/* --------------------------------------------------------------------------
   QR builder
   -------------------------------------------------------------------------- */

.qr-builder {
    display: grid;
    gap: clamp(20px, 3vw, 30px);
}

.qr-builder-block {
    display: grid;
    gap: var(--space-sm);
    padding-top: var(--space-md);
    border-top: 1px solid var(--white-alpha-05);
}

.qr-builder-block--type {
    padding-top: 0;
    border-top: 0;
}

.qr-type-tabs,
.qr-preset-strip {
    display: grid;
    gap: 10px;
}

.qr-type-tabs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.qr-type-tab,
.qr-preset-strip button,
.qr-file-control span,
.qr-inline-button {
    min-height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 0 15px;
    border: var(--surface-border);
    border-radius: var(--border-radius-sm);
    background: rgba(255, 255, 255, 0.035);
    color: var(--text-muted);
    font: inherit;
    font-weight: 620;
    line-height: 1;
    transition:
        background var(--motion-transition-control),
        border-color var(--motion-transition-control),
        color var(--motion-transition-control),
        box-shadow var(--motion-transition-control),
        transform var(--motion-transition-control);
}

.qr-type-tab:hover,
.qr-type-tab.is-active,
.qr-preset-strip button:hover,
.qr-preset-strip button.is-active,
.qr-file-control span:hover,
.qr-inline-button:hover:not(:disabled) {
    border-color: var(--blue-alpha-50);
    background: var(--blue-alpha-15);
    color: var(--primary-white);
    box-shadow: 0 0 24px var(--blue-alpha-10);
}

.qr-mode-panel,
.qr-options-grid,
.qr-logo-upload {
    min-width: 0;
}

.qr-field-grid,
.qr-options-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-md);
}

.qr-field {
    display: grid;
    gap: 8px;
}

.qr-field span,
.qr-check-field span {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.35;
}

.qr-field strong {
    color: var(--primary-white);
}

.qr-field input,
.qr-field textarea,
.qr-field select {
    width: 100%;
    min-height: var(--form-control-height);
    border: var(--form-control-border);
    border-radius: var(--form-control-radius);
    background: var(--form-control-bg);
    color: var(--primary-white);
    font: inherit;
    transition: var(--form-control-transition);
}

.qr-field input,
.qr-field textarea {
    padding: var(--form-control-padding);
}

.qr-field textarea {
    min-height: 126px;
    resize: vertical;
}

.qr-field input::placeholder,
.qr-field textarea::placeholder {
    color: var(--white-alpha-35);
}

.qr-field select {
    padding: var(--form-control-select-padding);
    appearance: none;
    background-image:
        linear-gradient(45deg, transparent 50%, var(--primary-blue) 50%),
        linear-gradient(135deg, var(--primary-blue) 50%, transparent 50%);
    background-position:
        calc(100% - 18px) calc(50% - 3px),
        calc(100% - 12px) calc(50% - 3px);
    background-size: 6px 6px, 6px 6px;
    background-repeat: no-repeat;
}

.qr-field select option {
    background: var(--bg-panel);
    color: var(--primary-white);
}

.qr-field input:focus,
.qr-field textarea:focus,
.qr-field select:focus {
    outline: none;
    border-color: var(--form-control-focus-border);
    box-shadow: var(--form-control-focus-shadow);
}

.qr-color-field input[type="color"] {
    min-height: 48px;
    padding: 6px;
    cursor: pointer;
}

.qr-color-field input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

.qr-color-field input[type="color"]::-webkit-color-swatch {
    border: 1px solid var(--white-alpha-15);
    border-radius: calc(var(--form-control-radius) - 3px);
    box-shadow:
        inset 0 0 0 1px var(--black-alpha-36),
        0 0 18px var(--blue-alpha-10);
}

.qr-color-field input[type="color"]::-moz-color-swatch {
    border: 1px solid var(--white-alpha-15);
    border-radius: calc(var(--form-control-radius) - 3px);
    box-shadow:
        inset 0 0 0 1px var(--black-alpha-36),
        0 0 18px var(--blue-alpha-10);
}

.qr-field input[type="range"] {
    min-height: 28px;
    padding: 0;
    background: transparent;
    accent-color: var(--primary-blue);
    appearance: none;
    cursor: pointer;
}

.qr-field input[type="range"]::-webkit-slider-runnable-track {
    height: 7px;
    border: 1px solid var(--white-alpha-08);
    border-radius: var(--border-radius-pill);
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-blue)) 0 / var(--qr-range-fill, 48%) 100% no-repeat,
        rgba(255, 255, 255, 0.12);
}

.qr-field input[type="range"]::-webkit-slider-thumb {
    width: 18px;
    height: 18px;
    margin-top: -6px;
    border: 2px solid var(--primary-blue);
    border-radius: var(--border-radius-circle);
    background: #08101f;
    box-shadow: 0 0 18px rgba(var(--primary-blue-rgb), 0.42);
    appearance: none;
}

.qr-field input[type="range"]::-moz-range-track {
    height: 7px;
    border: 1px solid var(--white-alpha-08);
    border-radius: var(--border-radius-pill);
    background: rgba(255, 255, 255, 0.12);
}

.qr-field input[type="range"]::-moz-range-progress {
    height: 7px;
    border-radius: var(--border-radius-pill);
    background: var(--primary-blue);
}

.qr-field input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border: 2px solid var(--primary-blue);
    border-radius: var(--border-radius-circle);
    background: #08101f;
    box-shadow: 0 0 18px rgba(var(--primary-blue-rgb), 0.42);
}

.qr-check-field {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: var(--form-control-height);
    padding: var(--form-control-padding);
    border: var(--form-control-border);
    border-radius: var(--form-control-radius);
    background: var(--form-control-bg);
}

.qr-check-field input {
    width: 16px;
    height: 16px;
    accent-color: var(--primary-blue);
}

.qr-preset-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.qr-preset-strip span {
    width: 8px;
    height: 8px;
    border: 1px solid var(--blue-alpha-50);
    border-radius: var(--border-radius-circle);
    background: var(--preset-color, var(--primary-blue));
    box-shadow: 0 0 10px rgba(var(--primary-blue-rgb), 0.36);
}

.qr-logo-upload {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: center;
}

.qr-file-control {
    min-width: 0;
}

.qr-file-control input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

.qr-file-control span,
.qr-inline-button {
    width: 100%;
}

.qr-inline-button:disabled {
    opacity: 0.42;
    pointer-events: none;
}

.qr-logo-upload small {
    grid-column: 1 / -1;
    color: var(--text-muted);
    font-size: 0.82rem;
}

/* --------------------------------------------------------------------------
   QR preview
   -------------------------------------------------------------------------- */

.qr-preview-panel {
    align-self: start;
    display: grid;
    align-content: start;
    gap: var(--space-md);
}

.qr-preview-frame {
    min-height: clamp(230px, 28vw, 320px);
    display: grid;
    place-items: center;
    padding: clamp(18px, 3vw, 32px);
    overflow: hidden;
    border: 1px solid var(--white-alpha-05);
    border-radius: var(--border-radius-lg);
    background:
        radial-gradient(circle at 50% 50%, rgba(var(--primary-blue-rgb), 0.08), transparent 56%),
        rgba(0, 0, 0, 0.22);
}

.qr-preview-surface {
    --qr-preview-max-size: 180px;
    --qr-preview-size: min(100%, var(--qr-preview-max-size));
    width: var(--qr-preview-size);
    height: var(--qr-preview-size);
    display: grid;
    place-items: center;
    max-width: 100%;
    max-height: 100%;
    overflow: hidden;
    border-radius: var(--border-radius-sm);
    background: #ffffff;
    box-shadow: 0 0 26px rgba(var(--primary-blue-rgb), 0.12);
}

.qr-preview-surface > * {
    width: var(--qr-preview-size) !important;
    height: var(--qr-preview-size) !important;
    max-width: 100%;
    max-height: 100%;
}

.qr-preview-surface * {
    max-width: 100%;
    max-height: 100%;
}

.qr-preview-surface canvas,
.qr-preview-surface svg {
    width: var(--qr-preview-size) !important;
    height: var(--qr-preview-size) !important;
    max-width: 100%;
    max-height: 100%;
    display: block;
    border-radius: inherit;
}

.qr-status {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.92rem;
}

.qr-status.is-error {
    color: #ff8f8f;
}

.qr-output-meta {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.qr-output-meta div {
    min-height: 74px;
    display: grid;
    align-content: center;
    gap: 6px;
    padding: 12px 14px;
    border: var(--surface-border-muted);
    border-radius: var(--border-radius-sm);
    background: rgba(255, 255, 255, 0.025);
}

.qr-output-meta span {
    color: var(--text-muted);
    font-size: 0.78rem;
}

.qr-output-meta strong {
    color: var(--primary-white);
}

.qr-download-actions .container-btn {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-md);
}

.qr-download-actions .btn-glass {
    --btn-glass-margin-top: 0;
    --btn-glass-min-width: 100%;
}

.qr-download-actions .btn-glass button {
    width: 100%;
}

/* --------------------------------------------------------------------------
   Ownership section
   -------------------------------------------------------------------------- */

.qr-promise {
    display: grid;
    justify-items: center;
    gap: clamp(34px, 5vw, 64px);
    margin-top: clamp(82px, 10vw, 124px);
    text-align: center;
}

.qr-faq-heading h2 {
    margin: 0;
    color: var(--primary-white);
    font-family: var(--font-display);
    font-size: clamp(2rem, 3.7vw, 3.2rem);
    font-weight: 520;
    line-height: 1.12;
    letter-spacing: 0;
}

.qr-promise-heading {
    width: min(100%, 880px);
}

.qr-promise h2 {
    max-width: 840px;
    margin: var(--space-sm) auto 0;
    font-size: clamp(2.35rem, 4.6vw, 3.65rem);
    line-height: 1.12;
}

.qr-promise p,
.qr-faq-heading p {
    max-width: 700px;
    margin: var(--space-sm) 0 0;
    color: var(--text-muted);
    font-size: 1.02rem;
    line-height: 1.7;
}

.qr-faq-heading p + p {
    margin-top: 10px;
}

.qr-promise p {
    margin-inline: auto;
}

.qr-promise ul {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    width: min(100%, 940px);
    gap: clamp(24px, 4vw, 56px);
    margin: 0;
    padding: 0;
    list-style: none;
}

.qr-promise li {
    display: grid;
    justify-items: center;
    align-content: start;
    gap: 10px;
    color: var(--text-muted);
}

.qr-promise i {
    color: var(--primary-blue);
    font-size: clamp(2.45rem, 5vw, 3.6rem);
    line-height: 1;
    filter: drop-shadow(0 0 18px rgba(var(--primary-blue-rgb), 0.32));
    animation: qrOwnershipIconGlow 2.8s ease-in-out infinite;
}

.qr-promise i.is-qr-glow-paused {
    animation-play-state: paused;
}

.qr-promise li:nth-child(2) i {
    animation-delay: 0.35s;
}

.qr-promise li:nth-child(3) i {
    animation-delay: 0.7s;
}

.qr-promise strong {
    color: var(--primary-white);
    font-size: clamp(1.05rem, 1.6vw, 1.22rem);
    line-height: 1.2;
}

.qr-promise li span {
    max-width: 230px;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.55;
}

/* --------------------------------------------------------------------------
   FAQ
   -------------------------------------------------------------------------- */

.qr-faq {
    display: grid;
    grid-template-columns: minmax(0, 0.65fr) minmax(0, 1.1fr);
    gap: clamp(28px, 5vw, 68px);
    align-items: start;
    margin-top: clamp(78px, 10vw, 124px);
}

.qr-faq-heading {
    position: relative;
}

.qr-faq-heading > .section-tag {
    margin-bottom: var(--space-sm);
}

.qr-faq-list {
    display: grid;
    gap: 12px;
}

.qr-faq-item {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--white-alpha-08);
    border-radius: var(--border-radius-sm);
    background:
        linear-gradient(135deg, rgba(var(--primary-blue-rgb), 0.07), transparent 38%),
        rgba(255, 255, 255, 0.025);
    transition:
        border-color var(--motion-transition-panel),
        background var(--motion-transition-panel);
}

.qr-faq-item.is-open {
    border-color: var(--blue-alpha-50);
    background:
        linear-gradient(135deg, rgba(var(--primary-blue-rgb), 0.12), transparent 42%),
        rgba(255, 255, 255, 0.035);
}

.qr-faq-item:hover {
    border-color: var(--primary-blue);
    background:
        linear-gradient(135deg, rgba(var(--primary-blue-rgb), 0.08), transparent 44%),
        rgba(255, 255, 255, 0.035);
}

.qr-faq-trigger {
    width: 100%;
    min-height: 58px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    padding: 18px 20px;
    border: 0;
    background: transparent;
    color: var(--primary-white);
    font: inherit;
    font-weight: 700;
    text-align: left;
}

.qr-faq-trigger i {
    width: 28px;
    height: 28px;
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-circle);
    background: var(--blue-alpha-15);
    color: var(--primary-blue);
    transition:
        background-color var(--motion-transition-fast),
        transform var(--motion-transition-toggle);
}

.qr-faq-item:hover .qr-faq-trigger i {
    background: var(--blue-alpha-20);
}

.qr-faq-item.is-open .qr-faq-trigger i {
    transform: rotate(45deg);
}

.qr-faq-answer {
    height: 0;
    overflow: hidden;
    color: var(--text-muted);
    transition:
        height var(--motion-transition-panel),
        opacity var(--motion-transition-panel);
    opacity: 0;
}

.qr-faq-item.is-open .qr-faq-answer {
    height: var(--faq-answer-height, auto);
    opacity: 1;
}

.qr-faq-answer p {
    margin: 0;
    padding: 0 20px 20px;
    line-height: 1.65;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.qr-tool-footer {
    min-height: 94px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    gap: var(--space-md);
    margin-top: clamp(58px, 7vw, 92px);
    padding-bottom: var(--space-md);
    border-top: 1px solid var(--white-alpha-05);
    color: var(--text-muted);
}

.qr-tool-footer p {
    margin: 0;
}

.qr-tool-footer a {
    color: var(--primary-white);
    text-decoration: none;
    transition:
        color var(--motion-transition-fast),
        filter var(--motion-transition-fast);
}

.qr-tool-footer p a:hover {
    color: var(--primary-blue);
    filter: drop-shadow(0 0 10px rgba(var(--primary-blue-rgb), 0.46));
}

.qr-tool-footer-mark {
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    justify-self: center;
    border-radius: var(--border-radius-circle);
}

.qr-tool-footer-mark img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 0.88;
    filter: drop-shadow(0 0 12px rgba(var(--primary-blue-rgb), 0.22));
    transition:
        opacity var(--motion-transition-fast),
        filter var(--motion-transition-fast);
}

.qr-tool-footer-mark:hover img {
    opacity: 1;
    filter:
        drop-shadow(0 0 12px rgba(var(--primary-blue-rgb), 0.54))
        drop-shadow(0 0 28px rgba(var(--primary-blue-rgb), 0.18));
}

.qr-tool-footer span {
    justify-self: end;
    font-family: var(--font-code);
    font-size: 0.78rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   Motion
   -------------------------------------------------------------------------- */

@keyframes qrProofIconGlow {
    0%,
    100% {
        filter: drop-shadow(0 0 2px rgba(var(--accent-purple-rgb), 0.28));
        opacity: 0.82;
    }

    50% {
        filter: drop-shadow(0 0 10px rgba(var(--accent-purple-rgb), 0.75));
        opacity: 1;
    }
}

@keyframes qrOwnershipIconGlow {
    0%,
    100% {
        color: rgba(var(--primary-blue-rgb), 0.78);
        filter: drop-shadow(0 0 5px rgba(var(--primary-blue-rgb), 0.24));
    }

    50% {
        color: var(--primary-blue);
        filter:
            drop-shadow(0 0 12px rgba(var(--primary-blue-rgb), 0.7))
            drop-shadow(0 0 28px rgba(var(--primary-blue-rgb), 0.22));
    }
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1080px) {
    .qr-tool-page {
        --qr-reveal-clip-margin: 20px;
    }

    .qr-tool-header,
    .qr-studio,
    .qr-tool-footer {
        width: min(calc(100% - 40px), 980px);
    }

    .qr-workspace,
    .qr-faq {
        grid-template-columns: 1fr;
    }

    .qr-faq-heading {
        position: static;
    }

    .qr-promise ul {
        grid-template-columns: 1fr;
        width: min(100%, 560px);
    }
}

@media (max-width: 720px) {
    .qr-tool-page {
        --qr-reveal-clip-margin: 16px;
    }

    .qr-tool-header,
    .qr-studio,
    .qr-tool-footer {
        width: min(calc(100% - 32px), 620px);
    }

    .qr-tool-header {
        min-height: 88px;
        padding-top: var(--space-sm);
    }

    .qr-tool-logo {
        width: 150px;
    }

    .qr-tool-nav-action,
    .qr-tool-nav-action .btn-glass {
        --btn-glass-min-width: 132px;
        --btn-glass-height: 44px;
    }

    .qr-tool-nav-action .btn-glass a {
        font-size: 0.76rem;
    }

    .qr-hero {
        min-height: 82vh;
        min-height: 82svh;
        padding: 104px 20px 72px;
    }

    .qr-hero-media {
        background-position: center 50%;
        opacity: 0.58;
    }

    .qr-hero-title {
        font-size: clamp(2.85rem, 13vw, 4rem);
        line-height: 1.1;
    }

    .qr-hero p {
        font-size: 0.98rem;
        line-height: 1.55;
    }

    .qr-hero-proof {
        gap: 10px;
        font-size: 0.84rem;
    }

    .qr-system {
        padding-top: var(--space-lg);
    }

    .qr-system-heading {
        margin-bottom: var(--space-lg);
    }

    .qr-system-heading .section-heading {
        font-size: clamp(2.15rem, 9.5vw, 3rem);
        line-height: 1.14;
    }

    .qr-panel {
        border-radius: var(--border-radius-lg);
        padding: var(--space-md);
    }

    .qr-panel-heading {
        align-items: center;
    }

    .qr-panel-heading h3 {
        font-size: 2rem;
    }

    .qr-panel-status {
        padding: 7px 10px;
        font-size: 0.64rem;
    }

    .qr-field-grid,
    .qr-options-grid,
    .qr-preset-strip,
    .qr-output-meta,
    .qr-download-actions .container-btn {
        grid-template-columns: 1fr;
    }

    .qr-type-tabs {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .qr-logo-upload {
        grid-template-columns: 1fr;
    }

    .qr-preview-frame {
        min-height: 230px;
        padding: var(--space-sm);
    }

    .qr-preview-surface {
        --qr-preview-max-size: 170px;
    }

    .qr-promise,
    .qr-faq {
        margin-top: var(--space-xl);
    }

    .qr-promise {
        gap: var(--space-lg);
    }

    .qr-tool-footer {
        grid-template-columns: 1fr;
        justify-items: center;
        text-align: center;
        margin-top: var(--space-xl);
        padding: var(--space-md) 0;
    }

    .qr-tool-footer p,
    .qr-tool-footer span {
        justify-self: center;
    }
}

@media (max-width: 380px) {
    .qr-tool-logo {
        width: 130px;
    }

    .qr-tool-nav-action,
    .qr-tool-nav-action .btn-glass {
        --btn-glass-min-width: 118px;
    }

    .qr-hero-title {
        font-size: 2.65rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .qr-hero-proof i {
        animation: none;
    }

    .qr-hero-stars .star {
        animation: none;
        opacity: 0.35;
    }

    .qr-faq-answer,
    .qr-faq-trigger i {
        transition: none;
    }
}