.page-tool--aspect-ratio-calculator .tool-page {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.page-tool--aspect-ratio-calculator .tool-setup__body {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.page-tool--aspect-ratio-calculator .tool-mode {
    margin: 0;
    padding: 0;
    border: 0;
}

.page-tool--aspect-ratio-calculator .tool-mode > .label {
    display: block;
    margin-bottom: 9px;
}

.page-tool--aspect-ratio-calculator .tool-mode__options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 8px;
}

.page-tool--aspect-ratio-calculator .tool-mode__option {
    position: relative;
    display: block;
}

.page-tool--aspect-ratio-calculator .tool-mode__option input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

.page-tool--aspect-ratio-calculator .tool-mode__label {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0.55rem 0.7rem;
    border: 1px solid var(--line-2);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--ink-2);
    font-size: 0.9rem;
    font-weight: 550;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}

.page-tool--aspect-ratio-calculator .tool-mode__option:hover .tool-mode__label {
    border-color: var(--line-strong);
    background: var(--surface-2);
}

.page-tool--aspect-ratio-calculator .tool-mode__option input:checked + .tool-mode__label {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--accent);
}

.page-tool--aspect-ratio-calculator .tool-mode__option input:focus-visible + .tool-mode__label {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.page-tool--aspect-ratio-calculator .tool-fields {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 14px 16px;
    align-items: start;
}

.page-tool--aspect-ratio-calculator .tool-fields--ratio {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.page-tool--aspect-ratio-calculator .tool-hint {
    margin: 0;
    color: var(--muted);
    font-size: 0.78rem;
}

.page-tool--aspect-ratio-calculator .tool-hint code {
    padding: 0.05rem 0.35rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-xs);
    background: var(--surface-3);
    color: var(--ink-2);
    font-family: var(--font-mono);
}

.page-tool--aspect-ratio-calculator .tool-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.page-tool--aspect-ratio-calculator .tool-workspace {
    display: grid;
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    grid-template-areas: "controls preview";
    gap: 16px;
    align-items: stretch;
}

.page-tool--aspect-ratio-calculator .tool-controls {
    grid-area: controls;
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-width: 0;
}

.page-tool--aspect-ratio-calculator .tool-output__body {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.page-tool--aspect-ratio-calculator .tool-status {
    margin: 0;
    padding: 0;
    border: 0;
    background: transparent;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--muted);
}

.page-tool--aspect-ratio-calculator .tool-status.status {
    padding: 9px 12px;
    border: 0;
    border-left: 3px solid var(--line-strong);
    border-radius: var(--radius-sm);
    background: var(--surface-2);
}

.page-tool--aspect-ratio-calculator .tool-status.status--error {
    border-left-color: var(--danger);
    background: var(--danger-soft);
    color: var(--danger);
}

.page-tool--aspect-ratio-calculator .tool-status.status--info {
    border-left-color: var(--accent);
    background: var(--accent-soft);
    color: var(--accent);
}

.page-tool--aspect-ratio-calculator .tool-code {
    min-height: 3.4rem;
    margin: 0;
    user-select: all;
}

.page-tool--aspect-ratio-calculator .tool-code:empty::before {
    content: "\2014";
    color: var(--faint);
}

.page-tool--aspect-ratio-calculator .tool-facts {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 6px 16px;
    margin: 0;
    padding: 12px 14px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: var(--surface-2);
    font-size: 0.82rem;
}

.page-tool--aspect-ratio-calculator .tool-facts dt {
    color: var(--faint);
}

.page-tool--aspect-ratio-calculator .tool-facts dd {
    margin: 0;
    color: var(--ink-2);
    font-family: var(--font-mono);
    overflow-wrap: anywhere;
}

/* Preview panel: the visual result is the hero of the page. */
.page-tool--aspect-ratio-calculator .tool-preview {
    grid-area: preview;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.page-tool--aspect-ratio-calculator .tool-preview__body {
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    gap: 12px;
    min-height: 0;
}

.page-tool--aspect-ratio-calculator .tool-preview__stage {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1 1 auto;
    min-height: clamp(320px, 46vh, 560px);
    padding: 54px 62px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background-color: var(--surface-2);
    background-image:
        linear-gradient(to right, var(--canvas-grid) 1px, transparent 1px),
        linear-gradient(to bottom, var(--canvas-grid) 1px, transparent 1px);
    background-size: 26px 26px;
    overflow: hidden;
}

.page-tool--aspect-ratio-calculator .ratio-figure {
    position: relative;
    width: 0;
    height: 0;
    margin: 0;
    transition: width 0.18s ease, height 0.18s ease;
}

.page-tool--aspect-ratio-calculator .ratio-preview {
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    border: 2px solid var(--accent-line);
    border-radius: var(--radius-sm);
    background: var(--accent-soft);
    box-shadow: 0 10px 30px -20px rgba(16, 24, 40, 0.55);
}

.page-tool--aspect-ratio-calculator .ratio-preview__ratio {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4px;
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: clamp(1.05rem, 2.1vw, 1.7rem);
    font-weight: 700;
    letter-spacing: 0.02em;
    text-align: center;
    pointer-events: none;
    overflow: hidden;
}

.page-tool--aspect-ratio-calculator .ratio-preview__dim {
    position: absolute;
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.76rem;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
    pointer-events: none;
}

.page-tool--aspect-ratio-calculator .ratio-preview__dim--w {
    bottom: 100%;
    left: 50%;
    padding-bottom: 7px;
    transform: translateX(-50%);
}

.page-tool--aspect-ratio-calculator .ratio-preview__dim--h {
    top: 50%;
    left: 100%;
    padding-left: 9px;
    transform: translateY(-50%);
}

.page-tool--aspect-ratio-calculator .tool-preview__hint {
    font-size: 0.8rem;
}

/* Common ratio comparison grid. */
.page-tool--aspect-ratio-calculator .tool-ratios__body {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.page-tool--aspect-ratio-calculator .tool-ratios__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(152px, 1fr));
    gap: 10px;
}

.page-tool--aspect-ratio-calculator .ratio-chip {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: inherit;
    font: inherit;
    text-align: left;
    cursor: pointer;
    transition: border-color 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}

.page-tool--aspect-ratio-calculator .ratio-chip:hover {
    border-color: var(--line-strong);
    background: var(--surface-2);
}

.page-tool--aspect-ratio-calculator .ratio-chip:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.page-tool--aspect-ratio-calculator .ratio-chip.is-active {
    border-color: var(--accent);
    background: var(--accent-soft);
    box-shadow: inset 0 0 0 1px var(--accent);
}

.page-tool--aspect-ratio-calculator .ratio-chip__frame {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 74px;
    height: 50px;
}

.page-tool--aspect-ratio-calculator .ratio-chip__shape {
    display: block;
    width: 0;
    height: 0;
    border: 1.5px solid var(--accent-line);
    border-radius: 3px;
    background: var(--accent-soft);
    transition: width 0.15s ease, height 0.15s ease, background-color 0.15s ease;
}

.page-tool--aspect-ratio-calculator .ratio-chip.is-active .ratio-chip__shape {
    border-color: var(--accent);
    background: var(--accent);
}

.page-tool--aspect-ratio-calculator .ratio-chip__meta {
    display: flex;
    flex-direction: column;
    gap: 1px;
    min-width: 0;
}

.page-tool--aspect-ratio-calculator .ratio-chip__label {
    color: var(--ink);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
}

.page-tool--aspect-ratio-calculator .ratio-chip.is-active .ratio-chip__label {
    color: var(--accent);
}

.page-tool--aspect-ratio-calculator .ratio-chip__note {
    color: var(--muted);
    font-size: 0.72rem;
}

.page-tool--aspect-ratio-calculator .tool-about__text {
    max-width: 80ch;
    margin: 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.page-tool--aspect-ratio-calculator .tool-about__text code {
    padding: 0.05rem 0.3rem;
    border-radius: var(--radius-xs);
    background: var(--surface-3);
    color: var(--ink-2);
    font-family: var(--font-mono);
}

@media (max-width: 900px) {
    .page-tool--aspect-ratio-calculator .tool-workspace {
        grid-template-columns: 1fr;
        grid-template-areas:
            "preview"
            "controls";
    }

    .page-tool--aspect-ratio-calculator .tool-preview__stage {
        min-height: clamp(260px, 44vh, 420px);
        padding: 46px 54px;
    }
}

@media (max-width: 560px) {
    .page-tool--aspect-ratio-calculator .tool-preview__stage {
        padding: 40px 44px;
    }

    .page-tool--aspect-ratio-calculator .tool-ratios__grid {
        grid-template-columns: repeat(auto-fill, minmax(132px, 1fr));
    }
}

@media (prefers-reduced-motion: reduce) {
    .page-tool--aspect-ratio-calculator .ratio-figure,
    .page-tool--aspect-ratio-calculator .ratio-preview,
    .page-tool--aspect-ratio-calculator .ratio-chip__shape {
        transition: none;
    }
}