:root {
    --scdev-ao-bg: #ffffff;
    --scdev-ao-border: #d8e1ec;
    --scdev-ao-shadow: 0 12px 30px rgba(31, 56, 85, 0.12);
    --scdev-ao-ink: #263447;
    --scdev-ao-title: #182538;
    --scdev-ao-muted: #607086;
    --scdev-ao-kicker: #087f73;
    --scdev-ao-primary: #176f67;
    --scdev-ao-primary-hover: #0f514c;
    --scdev-ao-dropzone-bg: #f5f9fd;
    --scdev-ao-dropzone-border: #9db9d3;
    --scdev-ao-dropzone-hover-bg: #effaf7;
    --scdev-ao-dropzone-hover-border: #168d80;
    --scdev-ao-dropzone-text: #24354a;
    --scdev-ao-dropzone-sub: #718197;
    --scdev-ao-surface: #f8fbff;
    --scdev-ao-surface-border: #d8e1ec;
    --scdev-ao-select-bg: #ffffff;
    --scdev-ao-select-border: #cbd7e4;
    --scdev-ao-select-ink: #263447;
    --scdev-ao-result-bg: #effaf7;
    --scdev-ao-result-ink: #24534e;
    --scdev-ao-result-summary: #42645f;
    --scdev-ao-alert-bg: #fff1f1;
    --scdev-ao-alert-ink: #a12626;
    --scdev-ao-alert-border: #fecaca;
    --scdev-ao-btn-more-bg: #ffffff;
    --scdev-ao-btn-more-border: #176f67;
    --scdev-ao-btn-more-ink: #176f67;
    --scdev-ao-btn-more-hover-bg: #effaf7;
}

/* ── Dark / Night Mode Theme Signals ── */
:is(
    html.dark-mode, html.night-mode, html[data-color-scheme="dark"],
    body.dark-mode, body.night-mode, body.sheer-dark, body.sheer-dark-mode,
    body.dark, body.theme-dark, body.is-dark, body.is-dark-theme,
    body.wp-dark-mode-active, [data-color-scheme="dark"], [data-theme="dark"], [data-theme="night"]
) .scdev-ao-converter-app,
:is(
    html.dark-mode, html.night-mode, html[data-color-scheme="dark"],
    body.dark-mode, body.night-mode, body.sheer-dark, body.sheer-dark-mode,
    body.dark, body.theme-dark, body.is-dark, body.is-dark-theme,
    body.wp-dark-mode-active, [data-color-scheme="dark"], [data-theme="dark"], [data-theme="night"]
).scdev-ao-converter-app {
    --scdev-ao-bg: #1c2230;
    --scdev-ao-border: #2e394e;
    --scdev-ao-shadow: 0 16px 36px rgba(0, 0, 0, 0.45);
    --scdev-ao-ink: #e2eaf4;
    --scdev-ao-title: #f1f6fd;
    --scdev-ao-muted: #95a7be;
    --scdev-ao-kicker: #26c6b3;
    --scdev-ao-primary: #1e9b8f;
    --scdev-ao-primary-hover: #26ab9d;
    --scdev-ao-dropzone-bg: #151a25;
    --scdev-ao-dropzone-border: #38465f;
    --scdev-ao-dropzone-hover-bg: #17242e;
    --scdev-ao-dropzone-hover-border: #26c6b3;
    --scdev-ao-dropzone-text: #e2eaf4;
    --scdev-ao-dropzone-sub: #8e9fad;
    --scdev-ao-surface: #151a25;
    --scdev-ao-surface-border: #2e394e;
    --scdev-ao-select-bg: #151a25;
    --scdev-ao-select-border: #38465f;
    --scdev-ao-select-ink: #e2eaf4;
    --scdev-ao-result-bg: #132727;
    --scdev-ao-result-ink: #9feade;
    --scdev-ao-result-summary: #b7ebe2;
    --scdev-ao-alert-bg: #351a1e;
    --scdev-ao-alert-ink: #fca5a5;
    --scdev-ao-alert-border: #5c2229;
    --scdev-ao-btn-more-bg: #151a25;
    --scdev-ao-btn-more-border: #26c6b3;
    --scdev-ao-btn-more-ink: #26c6b3;
    --scdev-ao-btn-more-hover-bg: #17242e;
}

/* ── System Dark Mode Fallback (when not explicitly set to light mode) ── */
@media (prefers-color-scheme: dark) {
    :root:not(.light-mode):not([data-color-scheme="light"]) .scdev-ao-converter-app {
        --scdev-ao-bg: #1c2230;
        --scdev-ao-border: #2e394e;
        --scdev-ao-shadow: 0 16px 36px rgba(0, 0, 0, 0.45);
        --scdev-ao-ink: #e2eaf4;
        --scdev-ao-title: #f1f6fd;
        --scdev-ao-muted: #95a7be;
        --scdev-ao-kicker: #26c6b3;
        --scdev-ao-primary: #1e9b8f;
        --scdev-ao-primary-hover: #26ab9d;
        --scdev-ao-dropzone-bg: #151a25;
        --scdev-ao-dropzone-border: #38465f;
        --scdev-ao-dropzone-hover-bg: #17242e;
        --scdev-ao-dropzone-hover-border: #26c6b3;
        --scdev-ao-dropzone-text: #e2eaf4;
        --scdev-ao-dropzone-sub: #8e9fad;
        --scdev-ao-surface: #151a25;
        --scdev-ao-surface-border: #2e394e;
        --scdev-ao-select-bg: #151a25;
        --scdev-ao-select-border: #38465f;
        --scdev-ao-select-ink: #e2eaf4;
        --scdev-ao-result-bg: #132727;
        --scdev-ao-result-ink: #9feade;
        --scdev-ao-result-summary: #b7ebe2;
        --scdev-ao-alert-bg: #351a1e;
        --scdev-ao-alert-ink: #fca5a5;
        --scdev-ao-alert-border: #5c2229;
        --scdev-ao-btn-more-bg: #151a25;
        --scdev-ao-btn-more-border: #26c6b3;
        --scdev-ao-btn-more-ink: #26c6b3;
        --scdev-ao-btn-more-hover-bg: #17242e;
    }
}

.scdev-ao-converter-app {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 12px 24px;
    color: var(--scdev-ao-ink);
    font-family: inherit;
    transition: color 0.25s ease;
}

.scdev-converter-heading {
    padding: 0 6px 12px;
    text-align: center;
}

.scdev-ao-converter-kicker {
    display: inline-block;
    color: var(--scdev-ao-kicker);
    font-size: 16px;
    font-weight: 700;
    letter-spacing: .14em;
    transition: color 0.25s ease;
}

.scdev-ao-converter-title {
    margin: 6px 0 8px;
    color: var(--scdev-ao-title);
    font-size: clamp(32px, 5vw, 46px);
    font-weight: 700;
    line-height: 1.1;
    transition: color 0.25s ease;
}

.scdev-ao-converter-description {
    margin: 0 auto;
    color: var(--scdev-ao-muted);
    font-size: 16px;
    line-height: 1.45;
    max-width: none;
    white-space: nowrap;
    transition: color 0.25s ease;
}

.scdev-image-converter,
.scdev-ao-download-card {
    padding: 22px;
    border: 1px solid var(--scdev-ao-border);
    border-radius: 16px;
    background: var(--scdev-ao-bg);
    box-shadow: var(--scdev-ao-shadow);
    transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.scdev-converter-dropzone {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 28px 12px;
    border: 2px dashed var(--scdev-ao-dropzone-border);
    border-radius: 12px;
    background: var(--scdev-ao-dropzone-bg);
    color: var(--scdev-ao-dropzone-text);
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.scdev-converter-dropzone:hover,
.scdev-converter-dropzone:focus-within {
    border-color: var(--scdev-ao-dropzone-hover-border);
    background: var(--scdev-ao-dropzone-hover-bg);
}

.scdev-converter-dropzone strong {
    font-size: 17px;
    color: var(--scdev-ao-dropzone-text);
    transition: color 0.2s ease;
}

.scdev-converter-dropzone span:not(.scdev-upload-icon) {
    color: var(--scdev-ao-dropzone-sub);
    font-size: 13px;
    transition: color 0.2s ease;
}

.scdev-upload-icon {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--scdev-ao-primary);
    color: #fff;
    font-size: 24px;
    line-height: 1;
    transition: background 0.2s ease;
}

.scdev-converter-dropzone input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

.scdev-ao-file-summary {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: 12px;
    padding: 10px;
    border: 1px solid var(--scdev-ao-surface-border);
    border-radius: 10px;
    background: var(--scdev-ao-surface);
    transition: background 0.2s ease, border-color 0.2s ease;
}

.scdev-ao-file-preview {
    display: block;
    width: 120px;
    height: 120px;
    flex: 0 0 120px;
    object-fit: contain;
    border-radius: 9px;
    background: var(--scdev-ao-dropzone-bg);
}

.scdev-ao-file-details {
    display: grid;
    gap: 3px;
    min-width: 0;
}

.scdev-ao-file-name {
    overflow: hidden;
    color: var(--scdev-ao-ink);
    font-size: 14px;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: color 0.2s ease;
}

.scdev-ao-file-meta {
    color: var(--scdev-ao-muted);
    font-size: 12px;
    transition: color 0.2s ease;
}

.scdev-converter-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin: 18px 0;
    color: var(--scdev-ao-ink);
    font-size: 14px;
    font-weight: 600;
    transition: color 0.2s ease;
}

.scdev-converter-options select {
    min-width: 150px;
    padding: 9px 30px 9px 12px;
    border: 1px solid var(--scdev-ao-select-border);
    border-radius: 8px;
    background: var(--scdev-ao-select-bg);
    color: var(--scdev-ao-select-ink);
    font: inherit;
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.scdev-converter-options select option {
    background: var(--scdev-ao-select-bg);
    color: var(--scdev-ao-select-ink);
}

.scdev-converter-submit {
    width: 100%;
    padding: 12px;
    border: 0;
    border-radius: 9px;
    background: var(--scdev-ao-primary);
    color: #fff;
    font-family: inherit;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
    transition: background .2s, transform .2s, opacity .2s;
}

.scdev-converter-submit:hover:not(:disabled) {
    background: var(--scdev-ao-primary-hover);
    transform: translateY(-1px);
}

.scdev-converter-submit:disabled {
    opacity: .7;
    cursor: not-allowed;
    transform: none;
}

.scdev-ao-converter-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.scdev-ao-converter-actions .scdev-converter-submit,
.scdev-ao-convert-more {
    flex: 1 1 220px;
}

.scdev-ao-convert-more {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px;
    border: 1px solid var(--scdev-ao-btn-more-border);
    border-radius: 9px;
    background: var(--scdev-ao-btn-more-bg);
    color: var(--scdev-ao-btn-more-ink);
    font-family: inherit;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: background .2s, color .2s, border-color .2s;
}

.scdev-ao-convert-more:hover {
    background: var(--scdev-ao-btn-more-hover-bg);
}

.scdev-ao-expired-button {
    background: #5a6677;
    color: #cbd5e1;
    cursor: not-allowed;
    opacity: .85;
}

.scdev-ao-expired-message {
    margin: 0 0 16px;
    color: var(--scdev-ao-muted);
    font-size: 14px;
    text-align: center;
}

.scdev-image-converter [role=alert] {
    margin: 14px 0 0;
    padding: 10px;
    border-radius: 8px;
    background: var(--scdev-ao-alert-bg);
    color: var(--scdev-ao-alert-ink);
    border: 1px solid var(--scdev-ao-alert-border);
    font-size: 14px;
}

.scdev-converter-result {
    margin-top: 16px;
    padding: 14px;
    border-radius: 10px;
    background: var(--scdev-ao-result-bg);
    color: var(--scdev-ao-result-ink);
    border: 1px solid var(--scdev-ao-dropzone-border);
    text-align: center;
    transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.scdev-converter-result-title {
    margin-bottom: 10px;
    font-weight: 700;
    color: var(--scdev-ao-title);
    transition: color 0.25s ease;
}

.scdev-ao-result-summary {
    margin: 0 0 12px;
    color: var(--scdev-ao-result-summary);
    font-size: 14px;
    line-height: 1.45;
    transition: color 0.25s ease;
}

.scdev-ao-result-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin: 0 0 18px;
}

.scdev-ao-result-stats div {
    display: grid;
    gap: 3px;
    padding: 9px 5px;
    border: 1px solid var(--scdev-ao-surface-border);
    border-radius: 8px;
    background: var(--scdev-ao-surface);
    transition: background 0.25s ease, border-color 0.25s ease;
}

.scdev-ao-result-stats span {
    color: var(--scdev-ao-muted);
    font-size: 11px;
    transition: color 0.25s ease;
}

.scdev-ao-result-stats strong {
    color: var(--scdev-ao-kicker);
    font-size: 15px;
    transition: color 0.25s ease;
}

.scdev-ao-delete-note {
    margin-top: 14px;
    color: var(--scdev-ao-muted);
    font-size: 12px;
    line-height: 1.4;
    transition: color 0.25s ease;
}

@media (max-width: 520px) {
    .scdev-ao-converter-app {
        margin: 0 auto;
        padding: 0 8px 18px;
    }
    .scdev-converter-heading {
        padding: 0 2px 10px;
    }
    .scdev-ao-converter-description {
        white-space: normal;
    }
    .scdev-image-converter {
        padding: 16px;
    }
    .scdev-converter-options {
        align-items: flex-start;
        flex-direction: column;
    }
    .scdev-converter-options select {
        width: 100%;
    }
    .scdev-ao-file-preview {
        width: 96px;
        height: 96px;
        flex-basis: 96px;
    }
}