.primer-settings-top-row {
    display: flex;
    justify-content: center;
    margin-top: 0.5em;
    flex-wrap: wrap;
    /* Top-align tiles so headings share the same baseline. */
    align-items: flex-start;
}

.primer-settings-top-row .settings-container {
    /* Overrides global .settings-container { justify-content: center; } */
    justify-content: flex-start;
}

.primer-settings-top-row .settings-heading-help {
    /* Remove default top margin so headings start aligned. */
    margin-top: 0;
}

.settings-container--amplicon-check {
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.settings-container--snp-check {
    min-width: 10em;
}

.snp-check-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5em;
    margin-top: 0.5em;
    font-size: 1em;
    font-weight: 500;
    cursor: pointer;
}

.snp-check-label input {
    width: 1.1em;
    height: 1.1em;
    cursor: pointer;
}

/* Amplicon check: same toggle family as Reference genome / Use case (3 positions); wide track so each label stays one line. */
.button-cover.amplicon-button-cover {
    width: min(100%, 38em);
    min-width: 28em;
    height: 3em;
}

.button-cover.amplicon-button-cover--silico {
    width: min(100%, 28em);
    min-width: 20em;
}

#amplicon-button.button,
#amplicon-button.button.r {
    overflow: hidden;
}

#amplicon-button .knobs.amplicon-knobs {
    position: relative;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: stretch;
    width: 100%;
    height: 100%;
    z-index: 2;
}

#amplicon-button .amplicon-pill {
    position: absolute;
    top: 0.08em;
    bottom: 0.08em;
    width: calc((100% - 0.7em) / 3);
    box-sizing: border-box;
    border-radius: var(--radius-sm);
    background-color: var(--color-accent);
    box-shadow: 0 0em 1em -0.5em #334747;
    z-index: 1;
    transition: 0.4s cubic-bezier(0.18, 0.89, 0.35, 1.15) left;
}

#amplicon-button[data-silico-two-option="1"] .amplicon-pill {
    width: calc((100% - 0.7em) / 2);
}

#amplicon-button[data-position="0"] .amplicon-pill {
    left: 0.35em;
}

#amplicon-button[data-position="1"] .amplicon-pill {
    left: calc(0.35em + (100% - 0.7em) / 3);
}

#amplicon-button[data-position="2"] .amplicon-pill {
    left: calc(0.35em + 2 * (100% - 0.7em) / 3);
}

#amplicon-button[data-silico-two-option="1"][data-position="1"] .amplicon-pill {
    left: calc(0.35em + (100% - 0.7em) / 2);
}

#amplicon-button .amplicon-opt {
    flex: 1 1 0;
    min-width: 0;
    position: relative;
    z-index: 2;
    margin: 0;
    padding: 0.2em 0.35em;
    border: none;
    background: transparent;
    cursor: pointer;
    font-family: var(--font-main);
    font-size: clamp(0.85em, 2.35vmin, 1.1em);
    font-weight: 500;
    line-height: 1.2;
    color: color(srgb 0.6649 0.8122 0.84);
    white-space: nowrap;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s ease;
}

/* SilicoPCR search context: match Reference genome toggle label size (1.3em). */
#amplicon-button[data-silico-two-option="1"] .amplicon-opt {
    font-size: 1.3em;
}

#amplicon-button[data-position="0"] .amplicon-opt[data-idx="0"],
#amplicon-button[data-position="1"] .amplicon-opt[data-idx="1"],
#amplicon-button[data-position="2"] .amplicon-opt[data-idx="2"] {
    color: white;
    font-weight: 600;
}

#amplicon-button .amplicon-opt:hover {
    color: color(srgb 0.35 0.55 0.58);
}

#amplicon-button[data-position="0"] .amplicon-opt[data-idx="0"]:hover,
#amplicon-button[data-position="1"] .amplicon-opt[data-idx="1"]:hover,
#amplicon-button[data-position="2"] .amplicon-opt[data-idx="2"]:hover {
    color: white;
}

#amplicon-button[data-position="0"] .layer {
    background-color: #ebf7fc;
}

#amplicon-button[data-position="1"] .layer,
#amplicon-button[data-position="2"] .layer {
    background-color: #fcebeb;
}

#amplicon-button .layer {
    transition: background-color 0.3s ease;
}

#amplicon-button:focus-visible {
    outline: 2px solid color(srgb 0.35 0.55 0.58);
    outline-offset: 3px;
    border-radius: var(--radius-md);
}

.identifier-two-col-wrap--reference-only {
    max-width: 50%;
    margin-left: auto;
    margin-right: auto;
}

/* Reference genome / Use case / Primer settings: native tooltip on heading (title) */
.settings-heading-help {
    cursor: help;
    border-bottom: 1px dotted transparent;
}

.settings-heading-help:hover {
    border-bottom-color: color(srgb 0.35 0.55 0.58);
}

.primer-custom-open-btn {
    margin-top: 0.5em;
    padding: 0.35em 0.9em;
    cursor: pointer;
    border-radius: 6px;
    border: 1px solid color(srgb 0.35 0.55 0.58);
    background: color(srgb 0.9068 0.9645 0.975);
    color: color(srgb 0.15 0.4 0.45);
    font-weight: 600;
    font-family: var(--font-main);
}

.primer-custom-open-btn:hover {
    background: #cfecf1;
}

.primer-custom-dialog {
    border: none;
    border-radius: 10px;
    padding: 0;
    max-width: min(96vw, 720px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.22);
}

.primer-custom-dialog::backdrop {
    background: rgba(0, 0, 0, 0.45);
}

.primer-custom-dialog-panel {
    position: relative;
    padding: 1.1em 1.25em 1em;
    max-height: 88vh;
    overflow: auto;
    box-sizing: border-box;
}

.primer-dialog-x {
    position: absolute;
    top: 0.3em;
    right: 0.4em;
    border: none;
    background: transparent;
    font-size: 1.5em;
    line-height: 1;
    cursor: pointer;
    color: #555;
}

.primer-dialog-title {
    margin: 0 1.8em 0.5em 0;
    font-size: 1.2em;
    color: color(srgb 0.2 0.45 0.5);
}

.primer-dialog-intro {
    margin: 0 0 1em;
    font-size: 0.9em;
    line-height: 1.45;
    color: #444;
}

.primer-dialog-sub {
    margin: 1em 0 0.4em;
    font-size: 1.05em;
    color: color(srgb 0.25 0.48 0.55);
}

.primer-dialog-hint {
    margin: 0 0 0.5em;
    font-size: 0.85em;
    color: #555;
}

.primer-dialog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 0.5em 1em;
    margin-bottom: 0.5em;
}

.primer-dialog-grid label {
    display: flex;
    flex-direction: column;
    gap: 0.25em;
    font-size: 0.82em;
    text-align: left;
}

.primer-dialog-grid input {
    max-width: 100%;
    padding: 0.25em 0.4em;
    font-size: 1em;
}

.primer-assay-preset-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75em 1em;
    margin: 0.35em 0 0.75em;
}

.primer-assay-preset-row .primer-assay-preset-btns {
    margin: 0;
}

.primer-assay-preset-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5em;
    margin: 0.35em 0 0.75em;
}

.primer-assay-preset-btn {
    padding: 0.45em 1.25em;
    cursor: pointer;
    border-radius: 8px;
    border: 2px solid color(srgb 0.45 0.65 0.68);
    background: #fff;
    color: color(srgb 0.25 0.45 0.5);
    font-family: var(--font-main);
    font-weight: 600;
    font-size: 0.95em;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.primer-assay-preset-btn:hover {
    background: color(srgb 0.92 0.97 0.98);
}

.primer-assay-preset-btn.is-selected {
    background: color(srgb 0.5338 0.7473 0.785);
    border-color: color(srgb 0.35 0.55 0.58);
    color: #fff;
}

.primer-assay-preset-btn.is-selected:hover {
    filter: brightness(0.97);
}

.primer-dialog-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75em;
    flex-wrap: wrap;
    margin-top: 1em;
}

/* Warning-style restore actions — same treatment for both instances */
.primer-dialog-restore {
    padding: 0.45em 1em;
    cursor: pointer;
    border-radius: 6px;
    border: 2px solid color(srgb 0.72 0.22 0.18);
    background: linear-gradient(180deg, #fff6f4 0%, #ffeae6 100%);
    color: color(srgb 0.42 0.1 0.08);
    font-family: var(--font-main);
    font-weight: 700;
    font-size: 0.88em;
    box-shadow: 0 1px 3px rgba(100, 25, 15, 0.15);
    flex-shrink: 0;
}

.primer-dialog-restore:hover {
    background: linear-gradient(180deg, #ffe8e4 0%, #ffd8d2 100%);
    border-color: color(srgb 0.58 0.15 0.12);
    color: color(srgb 0.32 0.06 0.05);
}

.primer-dialog-restore:focus-visible {
    outline: 2px solid color(srgb 0.88 0.4 0.28);
    outline-offset: 2px;
}

.primer-dialog-done {
    padding: 0.4em 1.2em;
    cursor: pointer;
    border-radius: 6px;
    border: 1px solid color(srgb 0.35 0.55 0.58);
    background: color(srgb 0.5338 0.7473 0.785);
    color: white;
    font-weight: 600;
    font-family: var(--font-main);
}