.tool-page {
    width: min(1440px, calc(100vw - (var(--page-pad) * 2)));
    min-width: 0;
    min-height: 0;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    gap: 18px;
    padding-top: 22px;
    padding-bottom: 8px;
    overflow: hidden;
}

.tool-hero {
    height: auto;
    min-height: 0;
    justify-items: center;
    align-content: start;
    text-align: center;
    gap: 0.55rem;
    padding-top: 0;
}

.tool-hero .hero-title {
    max-width: 100%;
    font-size: clamp(2.6rem, 4.8vw, 4.2rem);
    line-height: 1.02;
    white-space: normal;
}

.tool-hero .hero-section__lead {
    max-width: 860px;
    margin: 0 auto;
    font-size: 0.98rem;
    line-height: 1.78;
}

.tool-panel-grid {
    min-width: 0;
    min-height: 0;
    display: grid;
    gap: 18px;
    overflow: hidden;
}

.tool-panel-grid > * {
    min-width: 0;
    min-height: 0;
}

.tool-panel-grid--split {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
}

.tool-stage {
    min-width: 0;
    min-height: 0;
    padding: 0;
    overflow: hidden;
    box-shadow: none;
}

.tool-stage__scroll {
    height: 100%;
    min-height: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 28px;
    scrollbar-width: none;
    -ms-overflow-style: none;
    display: grid;
    align-content: start;
    gap: 18px;
}

.tool-stage__scroll::-webkit-scrollbar {
    display: none;
}

.tool-surface__head {
    display: grid;
    gap: 10px;
}

.tool-surface__head h2,
.tool-surface__head h3 {
    margin: 0;
    font-size: clamp(1.35rem, 1.7vw, 1.75rem);
    line-height: 1.1;
}

.tool-surface__head p {
    margin: 0;
    color: var(--ink-600);
    line-height: 1.65;
}

.tool-form {
    display: grid;
    gap: 16px;
}

.tool-form--inline {
    gap: 0;
}

.tool-inline-form {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 16px;
    align-items: end;
}

.tool-field-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

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

.tool-field--inline {
    min-width: 0;
}

.tool-field--full {
    grid-column: 1 / -1;
}

.tool-choice-field {
    border: 0;
    padding: 0;
    margin: 0;
    min-width: 0;
}

.tool-field__label {
    color: var(--ink-900);
    font-size: 0.92rem;
    font-weight: 800;
}

.tool-field__hint {
    color: var(--ink-500);
    font-size: 0.82rem;
    line-height: 1.5;
}

.tool-input,
.tool-textarea {
    width: 100%;
    border-radius: 16px;
    border: 1px solid rgba(24, 75, 88, 0.16);
    background: rgba(255, 255, 255, 0.92);
    color: var(--ink-950);
    padding: 0.92rem 1rem;
    font: inherit;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72);
}

.tool-input:focus,
.tool-textarea:focus {
    outline: none;
    border-color: rgba(37, 99, 235, 0.42);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.tool-textarea {
    min-height: 116px;
    resize: vertical;
}

.tool-button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tool-button-row--end {
    justify-content: flex-end;
}

.tool-choice-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.tool-mode-switch {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    padding: 6px;
    border-radius: 18px;
    background: rgba(15, 23, 42, 0.06);
    border: 1px solid rgba(24, 75, 88, 0.1);
}

.tool-mode-button {
    min-height: 42px;
    border: 0;
    border-radius: 14px;
    background: transparent;
    color: var(--ink-700);
    font: inherit;
    font-weight: 900;
    cursor: pointer;
}

.tool-mode-button.is-active {
    background: #fff;
    color: var(--blue-700);
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
}

.tool-choice-card {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 14px 16px;
    border-radius: 16px;
    border: 1px solid rgba(24, 75, 88, 0.12);
    background: rgba(255, 255, 255, 0.84);
    cursor: pointer;
}

.tool-choice-card input[type="radio"] {
    margin-top: 4px;
}

.tool-choice-copy {
    display: grid;
    gap: 4px;
}

.tool-choice-copy strong {
    color: var(--ink-950);
    font-size: 0.95rem;
}

.tool-choice-copy span {
    color: var(--ink-600);
    font-size: 0.84rem;
    line-height: 1.55;
}

.tool-button,
.tool-button--ghost,
.tool-link-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0.78rem 1.1rem;
    border-radius: 14px;
    border: 1px solid transparent;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
    text-decoration: none;
    transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.tool-button:hover,
.tool-button--ghost:hover,
.tool-link-button:hover {
    transform: translateY(-1px);
}

.tool-button {
    background: linear-gradient(135deg, var(--blue-700), #1d4ed8);
    color: #fff;
    box-shadow: 0 16px 36px rgba(37, 99, 235, 0.16);
}

.tool-button--ghost,
.tool-link-button {
    background: rgba(255, 255, 255, 0.78);
    color: var(--ink-900);
    border-color: rgba(24, 75, 88, 0.14);
}

.tool-button:disabled,
.tool-button--ghost:disabled {
    opacity: 0.65;
    cursor: wait;
    transform: none;
}

.tool-feedback {
    display: none;
    border-radius: 16px;
    padding: 0.92rem 1rem;
    font-size: 0.9rem;
    line-height: 1.6;
}

.tool-feedback.is-visible {
    display: block;
}

.tool-feedback[data-tone="info"] {
    background: rgba(59, 130, 246, 0.08);
    color: #1d4ed8;
}

.tool-feedback[data-tone="success"] {
    background: rgba(34, 197, 94, 0.1);
    color: #166534;
}

.tool-feedback[data-tone="error"] {
    background: rgba(220, 38, 38, 0.1);
    color: #b91c1c;
}

.tool-selection-list,
.tool-result-list,
.tool-mail-list {
    display: grid;
    gap: 12px;
}

.tool-selection-card,
.tool-result-card,
.tool-mail-card,
.tool-mail-detail {
    border-radius: 20px;
    border: 1px solid rgba(24, 75, 88, 0.12);
    background: rgba(255, 255, 255, 0.84);
    padding: 16px 18px;
}

.tool-selection-option {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 12px 14px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.86);
    border: 1px solid rgba(24, 75, 88, 0.1);
}

.tool-selection-option input[type="checkbox"] {
    margin-top: 3px;
}

.tool-selection-copy {
    display: grid;
    gap: 4px;
}

.tool-selection-copy strong,
.tool-mail-row strong {
    font-size: 0.95rem;
    color: var(--ink-950);
    word-break: break-word;
}

.tool-selection-copy span,
.tool-mail-row span,
.tool-mail-detail__meta,
.tool-result-meta {
    color: var(--ink-600);
    font-size: 0.84rem;
    line-height: 1.55;
}

.tool-result-summary {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.tool-summary-list {
    display: grid;
    gap: 12px;
}

.tool-summary-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: flex-start;
    flex-wrap: wrap;
    color: var(--ink-700);
    line-height: 1.6;
}

.tool-summary-row span {
    color: var(--ink-500);
    font-size: 0.84rem;
}

.tool-summary-row strong {
    color: var(--ink-950);
    font-size: 0.92rem;
    font-weight: 800;
    word-break: break-word;
    text-align: right;
}

.tool-stat {
    padding: 12px 14px;
    border-radius: 16px;
    border: 1px solid rgba(24, 75, 88, 0.08);
    background: rgba(255, 255, 255, 0.82);
}

.tool-stat__label {
    color: var(--ink-500);
    font-size: 0.76rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.tool-stat__value {
    margin-top: 8px;
    color: var(--ink-950);
    font-size: 1.45rem;
    font-weight: 900;
}

.tool-status-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    padding: 0.42rem 0.78rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid rgba(24, 75, 88, 0.12);
    color: var(--ink-700);
    font-size: 0.82rem;
    font-weight: 800;
}

.tool-status-pill[data-tone="success"] {
    color: #166534;
    background: rgba(34, 197, 94, 0.1);
}

.tool-status-pill[data-tone="warning"] {
    color: #9a5b00;
    background: rgba(245, 158, 11, 0.12);
}

.tool-status-pill[data-tone="error"] {
    color: #b91c1c;
    background: rgba(220, 38, 38, 0.1);
}

.tool-status-pill[data-tone="info"] {
    color: #1d4ed8;
    background: rgba(59, 130, 246, 0.12);
}

.tool-mail-layout {
    min-width: 0;
    min-height: 0;
    display: grid;
    grid-template-columns: minmax(320px, 0.88fr) minmax(0, 1.12fr);
    gap: 18px;
    overflow: hidden;
}

.tool-mail-layout > * {
    min-width: 0;
    min-height: 0;
}

.tool-mail-column {
    min-width: 0;
    min-height: 0;
}

.tool-mail-row {
    width: 100%;
    border: 0;
    text-align: left;
    background: transparent;
    display: grid;
    gap: 6px;
    cursor: pointer;
    padding: 0;
}

.tool-mail-row.is-active strong {
    color: var(--blue-700);
}

.tool-mail-row__meta {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
}

.tool-mail-preview,
.tool-mail-detail__body {
    color: var(--ink-700);
    line-height: 1.7;
    white-space: pre-wrap;
    word-break: break-word;
}

.tool-mail-detail__body {
    min-height: 320px;
    max-height: 540px;
    overflow: auto;
    padding: 14px 16px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(24, 75, 88, 0.08);
}

.tool-mail-empty {
    min-height: 240px;
    display: grid;
    place-items: center;
    text-align: center;
    color: var(--ink-500);
    border-radius: 18px;
    border: 1px dashed rgba(24, 75, 88, 0.16);
    background: rgba(255, 255, 255, 0.62);
}

.tool-mono {
    font-family: var(--font-mono);
}

@media (max-width: 1180px) {
    .tool-page {
        width: min(100%, calc(100vw - (var(--page-pad) * 2)));
    }

    .tool-panel-grid--split,
    .tool-mail-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 900px) {
    .tool-stage__scroll {
        padding: 22px;
    }
}

@media (max-width: 720px) {
    .converter-body {
        overflow: auto;
    }

    .tool-page {
        overflow: visible;
        padding-bottom: 24px;
    }

    .tool-panel-grid,
    .tool-stage,
    .tool-stage__scroll,
    .tool-mail-layout,
    .tool-mail-column {
        min-height: auto;
        height: auto;
        overflow: visible;
    }

    .tool-field-grid,
    .tool-result-summary,
    .tool-choice-row {
        grid-template-columns: 1fr;
    }

    .tool-inline-form {
        grid-template-columns: 1fr;
    }

    .tool-button-row--end {
        justify-content: flex-start;
    }
}