.tools-layout {
    display: grid;
    grid-template-columns: minmax(220px, 320px) minmax(0, 1fr);
    gap: 1.5rem;
    align-items: start;
}

.tools-directory {
    min-width: 0;
}

.hours-tool-list {
    display: grid;
    gap: .75rem;
}

.hours-tool-button {
    display: grid;
    grid-template-columns: 42px minmax(0, 1fr);
    gap: .9rem;
    align-items: center;
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text);
    text-align: left;
    cursor: pointer;
    transition:
        border-color 140ms ease,
        background 140ms ease,
        transform 140ms ease;
}

.hours-tool-button:hover {
    background: var(--surface-solid);
    transform: translateY(-1px);
}

.hours-tool-button.is-active {
    border-color: var(--accent);
    background: var(--surface-solid);
}

.hours-tool-button__icon {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: rgba(27, 33, 29, .07);
    font-size: .72rem;
    font-weight: 800;
    text-transform: uppercase;
    overflow: hidden;
}

.hours-tool-button__copy {
    display: grid;
    gap: .2rem;
    min-width: 0;
}

.hours-tool-button__copy strong {
    font-size: .98rem;
}

.hours-tool-button__copy small {
    color: var(--muted);
    line-height: 1.4;
}

.hours-tool-host {
    min-width: 0;
    min-height: 420px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    overflow: hidden;
}

.hours-tool-host[hidden] {
    display: none;
}

.hours-tool-shell {
    min-height: inherit;
}

.hours-tool-shell__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.25rem 1.4rem;
    border-bottom: 1px solid var(--line);
}

.hours-tool-shell__header h2 {
    margin: 0;
}

.hours-tool-shell__body {
    padding: 1.4rem;
}

.hours-tool-loading,
.hours-tool-error {
    display: grid;
    place-items: center;
    min-height: 320px;
    padding: 2rem;
    text-align: center;
}

.hours-tool-loading {
    color: var(--muted);
}

.hours-tool-error {
    color: var(--danger);
}

/* Calculator */

.hours-calculator {
    width: min(100%, 440px);
    margin-inline: auto;
}

.hours-calculator__display {
    width: 100%;
    min-height: 76px;
    padding: 1rem 1.1rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface-solid);
    color: var(--text);
    font: inherit;
    font-size: clamp(1.5rem, 5vw, 2.25rem);
    font-variant-numeric: tabular-nums;
    text-align: right;
}

.hours-calculator__message {
    min-height: 1.4em;
    margin: .55rem 0;
    color: var(--danger);
    font-size: .86rem;
    text-align: right;
}

.hours-calculator__keys {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: .6rem;
}

.hours-calculator__keys button {
    min-height: 56px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--surface-solid);
    color: var(--text);
    font: inherit;
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
}

.hours-calculator__keys button:hover {
    background: rgba(27, 33, 29, .08);
}

.hours-calculator__keys button[data-calc-action="equals"] {
    background: var(--accent);
    color: white;
}

@media (max-width: 800px) {
    .tools-layout {
        grid-template-columns: 1fr;
    }

    .hours-tool-list {
        grid-template-columns: repeat(
            auto-fit,
            minmax(210px, 1fr)
        );
    }
}