/* ===========================================================================
   Online UPC Barcode Lookup — styles

   Brand: Dynamsoft style guide (https://dynamsoft.github.io/styleguide/style-guide.html).
   Adapted from the Codepool scanner demos: dark brand-gray surface, orange
   reserved for CTAs and accents, white result cards. Unlike the live-camera
   pages the document scrolls — there is no viewfinder to keep in the viewport.
   =========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;600;700&family=Oswald:wght@300;400;500&display=swap');

:root {
    --dy-orange: #fe8e14;
    --dy-orange-hover: #e07d0b;
    --dy-gray-900: #323234;
    --dy-gray-800: #3a3a3d;
    --dy-gray-700: #606060;
    --dy-gray-300: #cccccc;
    --dy-gray-200: #dddddd;
    --dy-gray-50: #f5f5f5;
    --white: #ffffff;

    --font-heading: 'Oswald', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --font-body: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;

    /* Hairlines and translucent fills that read on the dark surface. */
    --line-dark: rgba(255, 255, 255, 0.14);
    --fill-dark: rgba(255, 255, 255, 0.07);

    /* Inline text links inside the white cards. Brand orange stays reserved
       for CTAs, so links use the style guide's Blumine. */
    --dy-link: #306877;
    --dy-link-hover: #27555f;

    /* A red that reads on white for the failed-check-digit state. */
    --dy-error: #b3261e;
    --dy-error-tint: #fdf2f1;
    --dy-ok: #1e7a4b;
    --dy-ok-tint: #eef8f2;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    /* Brand gray, very slightly lifted at the top so the flat surface still has
       a sense of depth. */
    background: linear-gradient(180deg, var(--dy-gray-800) 0%, var(--dy-gray-900) 55%);
    color: var(--white);
    min-height: 100vh;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

.demo-shell {
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 880px;
    margin: 0 auto;
    padding: calc(14px + env(safe-area-inset-top)) 16px calc(14px + env(safe-area-inset-bottom));
    gap: 12px;
}

/* ---------------------------------------------------------------------------
   Header — Dynamsoft logo lockup, top-left, matching every Codepool demo
   --------------------------------------------------------------------------- */

.demo-header {
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 3px;
    padding-left: 2px;
}

.demo-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    max-width: 100%;
}

.brand-logo {
    display: block;
    height: 22px;
    width: auto;
    flex: 0 0 auto;
}

.brand-divider {
    width: 1px;
    height: 20px;
    background: var(--line-dark);
    flex: 0 0 auto;
}

/* "Free" tag in the page heading. The orange is the brand accent — never used
   for body copy — and the label is decorative repetition of adjacent text, so
   it is not announced twice. */
.brand-tag {
    display: inline-block;
    margin-right: 8px;
    padding: 1px 7px 2px;
    border: 1px solid rgba(254, 142, 20, 0.55);
    border-radius: 4px;
    background: rgba(254, 142, 20, 0.15);
    color: var(--dy-orange, #fe8e14);
    font-family: var(--font-heading);
    font-size: 0.62em;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    vertical-align: 0.1em;
}

.demo-nav {
    display: flex;
    gap: 18px;
    margin-top: 10px;
    font-size: 0.85rem;
}

.demo-nav a {
    color: rgba(255, 255, 255, 0.72);
    text-decoration: none;
}

.demo-nav a:hover {
    color: var(--dy-orange);
}

.demo-header h1 {
    font-family: var(--font-heading);
    font-size: 1.26rem;
    font-weight: 400;
    letter-spacing: 0.02em;
    color: var(--white);
    line-height: 1.2;
    white-space: nowrap;
}

.demo-header .subtitle {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.72);
    text-align: left;
}

/* ---------------------------------------------------------------------------
   Mode switch (Camera / Upload) and live camera view
   --------------------------------------------------------------------------- */

.controls-row {
    display: flex;
    flex: 0 0 auto;
    justify-content: center;
    width: 100%;
}

.mode-switch {
    position: relative;
    display: flex;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50px;
    padding: 4px;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.mode-options {
    display: flex;
    position: relative;
    z-index: 2;
}

.mode-option {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.6rem;
    border-radius: 46px;
    cursor: pointer;
    transition: color 0.3s ease;
    color: rgba(255, 255, 255, 0.7);
    font-weight: 500;
    font-size: 0.9rem;
    -webkit-user-select: none;
    user-select: none;
    white-space: nowrap;
}

.mode-option.active {
    color: #fff;
    font-weight: 600;
}

.mode-icon {
    fill: currentColor;
    stroke: currentColor;
    stroke-width: 2;
    flex: 0 0 auto;
}

.mode-slider {
    position: absolute;
    top: 4px;
    left: 4px;
    width: calc(50% - 4px);
    height: calc(100% - 8px);
    background: var(--dy-orange);
    border-radius: 42px;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 16px rgba(254, 142, 20, 0.3);
}

.mode-switch[data-active="upload"] .mode-slider {
    transform: translateX(100%);
}

/* `display:flex` would otherwise beat the [hidden] attribute. */
#camera-section[hidden],
#workbench[hidden] {
    display: none;
}

#camera-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

#camera-view {
    width: 100%;
    height: 420px;
    border-radius: 12px;
    overflow: hidden;
    background: #000;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

/* ---------------------------------------------------------------------------
   Workbench: image column + manual entry column
   --------------------------------------------------------------------------- */

#lookup-app {
    display: flex;
    flex: 1 1 auto;
    flex-direction: column;
    gap: 12px;
}

#tip-message {
    flex: 0 0 auto;
    align-self: center;
    max-width: 100%;
    font-size: 0.9rem;
    color: #fff;
    text-align: center;
    background: rgba(0, 0, 0, 0.45);
    padding: 0.5rem 1.1rem;
    border-radius: 25px;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

#tip-message.is-error {
    background: rgba(179, 38, 30, 0.92);
}

.workbench {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 12px;
    align-items: stretch;
}

.panel {
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-width: 0;
}

/* Upload drop zone: click, drag & drop, or paste. */
.upload-zone {
    display: flex;
    flex: 1 1 auto;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 190px;
    padding: 24px;
    border: 2px dashed rgba(255, 255, 255, 0.5);
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.18);
    color: #fff;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.upload-zone:hover,
.upload-zone:focus-visible,
.upload-zone.dragover {
    border-color: var(--dy-orange);
    background: rgba(254, 142, 20, 0.18);
    outline: none;
}

.upload-zone-icon {
    width: 42px;
    height: 42px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    opacity: 0.9;
}

.upload-zone-title {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 600;
}

.upload-zone-hint {
    margin: 0;
    max-width: 34ch;
    font-size: 0.83rem;
    line-height: 1.5;
    opacity: 0.9;
}

.upload-zone kbd {
    padding: 1px 5px;
    border: 1px solid rgba(255, 255, 255, 0.45);
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.85em;
}

/* Bundled sample symbols, so the page is usable with no file at hand. */
.sample-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}

.sample-row-label {
    width: 100%;
    font-size: 0.78rem;
    opacity: 0.8;
}

.sample-chip {
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    color: #fff;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 40px;
    padding: 0.42rem 0.95rem;
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.sample-chip:hover,
.sample-chip:focus-visible {
    background: rgba(254, 142, 20, 0.25);
    border-color: var(--dy-orange);
    outline: none;
}

/* Manual entry form */
.manual-form {
    display: flex;
    flex: 1 1 auto;
    flex-direction: column;
    gap: 8px;
    padding: 20px;
    border: 1px solid var(--line-dark);
    border-radius: 12px;
    background: var(--fill-dark);
}

.manual-label {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 0.02em;
}

.manual-input {
    font-family: var(--font-mono);
    font-size: 1.05rem;
    letter-spacing: 0.04em;
    color: var(--white);
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 6px;
    padding: 0.6rem 0.75rem;
    width: 100%;
}

.manual-input:focus-visible {
    outline: 2px solid var(--dy-orange);
    outline-offset: 1px;
    border-color: transparent;
}

.manual-input::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.manual-hint {
    font-size: 0.76rem;
    line-height: 1.5;
    color: rgba(255, 255, 255, 0.65);
}

.manual-button {
    align-self: flex-start;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    color: var(--white);
    background: var(--dy-orange);
    border: none;
    border-radius: 40px;
    padding: 0.55rem 1.6rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.manual-button:hover,
.manual-button:focus-visible {
    background: var(--dy-orange-hover);
    outline: none;
}

/* ---------------------------------------------------------------------------
   Results — inline section under the workbench
   --------------------------------------------------------------------------- */

.results {
    display: flex;
    flex-direction: column;
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    color: var(--dy-gray-900);
}

.results[hidden] {
    display: none;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    flex: 0 0 auto;
    padding: 0.75rem 1.25rem;
    background: var(--dy-gray-900);
    color: var(--white);
    font-family: var(--font-heading);
    font-weight: 400;
    letter-spacing: 0.02em;
    font-size: 15px;
}

.text-button {
    font-family: var(--font-body);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--white);
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 4px;
    padding: 0.32rem 0.7rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.text-button:hover {
    background: rgba(255, 255, 255, 0.26);
}

.results-body {
    flex: 1 1 auto;
    padding: 1.25rem;
}

/* ---------------------------------------------------------------------------
   Result card
   --------------------------------------------------------------------------- */

.barcode-card {
    border: 1px solid var(--dy-gray-200);
    border-radius: 8px;
    padding: 1rem 1.1rem 1.1rem;
}

.barcode-card + .barcode-card {
    margin-top: 1.25rem;
}

.barcode-card-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    padding-bottom: 0.7rem;
    margin-bottom: 0.9rem;
    border-bottom: 1px solid var(--dy-gray-200);
}

.format-chip {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    color: var(--dy-gray-900);
}

.card-note {
    font-size: 0.88rem;
    line-height: 1.6;
    color: var(--dy-gray-700);
}

/* Product panel: photo on the left, fields on the right */
.product-panel {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    margin-bottom: 0.9rem;
}

.product-panel.is-empty {
    background: var(--dy-gray-50);
    border: 1px solid var(--dy-gray-200);
    border-radius: 6px;
    padding: 0.75rem 0.9rem;
}

.product-image {
    width: 96px;
    height: 96px;
    object-fit: contain;
    border: 1px solid var(--dy-gray-200);
    border-radius: 6px;
    background: #fff;
    flex: 0 0 auto;
}

.product-body {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    min-width: 0;
}

.product-name {
    font-family: var(--font-body);
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.35;
    color: var(--dy-gray-900);
}

.product-fact {
    font-size: 0.86rem;
    color: var(--dy-gray-900);
    overflow-wrap: anywhere;
}

.product-fact-label {
    font-weight: 600;
    color: var(--dy-gray-700);
}

.product-body a {
    color: var(--dy-link);
    text-decoration: underline;
    text-underline-offset: 2px;
    font-size: 0.86rem;
    overflow-wrap: anywhere;
}

.product-body a:hover {
    color: var(--dy-link-hover);
}

.results-body a {
    color: var(--dy-link);
}

/* Facts list and diagnostics */
.facts {
    display: grid;
    grid-template-columns: minmax(140px, max-content) 1fr;
    gap: 0.3rem 1rem;
    font-size: 0.84rem;
    margin-bottom: 0.2rem;
}

.facts dt {
    font-weight: 600;
    color: var(--dy-gray-700);
}

.facts dd {
    color: var(--dy-gray-900);
    overflow-wrap: anywhere;
}

.facts dd.mono {
    font-family: var(--font-mono);
    font-size: 0.78rem;
}

.tag-ok,
.tag-bad {
    display: inline-block;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border-radius: 3px;
    padding: 1px 5px;
}

.tag-ok {
    color: var(--dy-ok);
    background: var(--dy-ok-tint);
    border: 1px solid #bfe3d0;
}

.tag-bad {
    color: var(--dy-error);
    background: var(--dy-error-tint);
    border: 1px solid #f0c9c6;
}

.note-list {
    list-style: none;
    margin: 0.8rem 0 0;
    padding: 0.6rem 0.75rem;
    border-radius: 4px;
    font-size: 0.83rem;
    line-height: 1.55;
}

.note-list li {
    padding-left: 1rem;
    position: relative;
}

.note-list li::before {
    content: '•';
    position: absolute;
    left: 0;
}

.note-list.is-warn {
    color: #7a4a05;
    background: #fff8ee;
    border: 1px solid #f6d3a3;
}

.note-list.is-error {
    color: var(--dy-error);
    background: var(--dy-error-tint);
    border: 1px solid #f0c9c6;
}

/* The scanned image, so the result can be checked against what was read. */
.source-preview {
    margin: 0 0 1.25rem;
    text-align: center;
}

.source-preview img {
    max-width: 100%;
    max-height: 180px;
    border: 1px solid var(--dy-gray-200);
    border-radius: 6px;
    background: #fff;
}

.source-preview figcaption {
    margin-top: 0.4rem;
    font-size: 0.78rem;
    color: var(--dy-gray-700);
}

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

.demo-footer {
    flex: 0 0 auto;
    padding: 8px 10px;
    background-color: var(--fill-dark);
    border: 1px solid var(--line-dark);
    border-radius: 6px;
    font-size: 0.8em;
    text-align: center;
}

.demo-footer p {
    margin: 0;
}

.demo-footer p + p {
    margin-top: 4px;
}

.demo-footer a {
    color: var(--dy-gray-200);
    text-decoration: none;
    margin: 0 3px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.35);
}

.demo-footer a:hover {
    color: var(--dy-orange);
    border-bottom-color: var(--dy-orange);
}

/* ---------------------------------------------------------------------------
   Loading / error overlay
   --------------------------------------------------------------------------- */

.loading-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 24px;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loading-overlay p {
    max-width: 520px;
    text-align: center;
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--white);
    white-space: pre-line;
}

.spinner {
    width: 46px;
    height: 46px;
    border: 5px solid rgba(255, 255, 255, 0.25);
    border-top-color: var(--dy-orange);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

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

@media only screen and (max-width: 768px) {
    .demo-header h1 {
        font-size: 1.2rem;
    }

    .brand-tag {
        display: none;
    }

    .demo-header .subtitle {
        font-size: 0.78rem;
    }

    /* The two input paths stack one per row. */
    .workbench {
        grid-template-columns: 1fr;
    }

    #camera-view {
        height: 300px;
    }

    .facts {
        grid-template-columns: 1fr;
        gap: 0.15rem;
    }

    .facts dt {
        margin-top: 0.5rem;
    }
}

@media only screen and (max-width: 480px) {
    .demo-shell {
        padding: calc(10px + env(safe-area-inset-top)) 10px calc(10px + env(safe-area-inset-bottom));
    }

    .demo-header .subtitle {
        display: none;
    }

    .demo-header h1 {
        font-size: 1.05rem;
    }

    .upload-zone {
        min-height: 150px;
        padding: 18px;
    }

    .product-panel {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .product-body {
        align-items: center;
    }

    .demo-footer {
        font-size: 0.72em;
    }
}