:root {
    --cz-bg: #f7f9fb;
    --cz-bg-strong: #edf2f7;
    --cz-surface: #ffffff;
    --cz-surface-soft: #f8fafc;
    --cz-ink: #101828;
    --cz-body: #243042;
    --cz-muted: #667085;
    --cz-border: #d8dee8;
    --cz-border-strong: #b8c2d2;
    --cz-accent: #0f9f6e;
    --cz-accent-dark: #087a55;
    --cz-accent-soft: #e8f8f1;
    --cz-blue: #2563eb;
    --cz-blue-soft: #e9f0ff;
    --cz-coral: #d94841;
    --cz-amber: #b7791f;
    --cz-shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.08);
    --cz-shadow-md: 0 12px 30px rgba(16, 24, 40, 0.1);
    --cz-radius: 8px;
    --cz-focus: 0 0 0 4px rgba(15, 159, 110, 0.16);
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    background: var(--cz-bg);
}

body {
    min-height: 100%;
    margin: 0;
    background:
        linear-gradient(180deg, #ffffff 0, var(--cz-bg) 340px),
        var(--cz-bg);
    color: var(--cz-body);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
}

button,
textarea {
    font: inherit;
}

button {
    cursor: pointer;
}

[hidden] {
    display: none !important;
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.app-shell {
    width: min(100%, 1480px);
    margin: 0 auto;
    padding: 16px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    min-height: 60px;
    margin-bottom: 18px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--cz-ink);
    text-decoration: none;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border: 1px solid rgba(15, 159, 110, 0.35);
    border-radius: var(--cz-radius);
    background: linear-gradient(135deg, var(--cz-accent), var(--cz-blue));
    color: #ffffff;
    font-size: 0.92rem;
    font-weight: 800;
    letter-spacing: 0;
    box-shadow: var(--cz-shadow-sm);
}

.brand-copy {
    display: grid;
    gap: 1px;
}

.brand-copy strong {
    color: var(--cz-ink);
    font-size: 1.04rem;
}

.brand-copy small {
    color: var(--cz-muted);
    font-size: 0.78rem;
}

.topbar-actions {
    display: flex;
    justify-content: flex-end;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 12px;
    border: 1px solid var(--cz-border);
    border-radius: 999px;
    background: var(--cz-surface);
    color: var(--cz-muted);
    font-size: 0.86rem;
    box-shadow: var(--cz-shadow-sm);
}

.app-grid {
    display: grid;
    gap: 18px;
}

.category-rail {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 2px 2px 8px;
    scrollbar-width: thin;
}

.category-button {
    flex: 0 0 auto;
    min-height: 42px;
    padding: 0 14px;
    border: 1px solid var(--cz-border);
    border-radius: 999px;
    background: var(--cz-surface);
    color: var(--cz-muted);
    font-weight: 700;
    transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.category-button:hover,
.category-button:focus-visible,
.example-chip:hover,
.example-chip:focus-visible,
.ghost-button:hover,
.ghost-button:focus-visible,
.text-button:hover,
.text-button:focus-visible {
    border-color: var(--cz-border-strong);
    color: var(--cz-ink);
}

.category-button:focus-visible,
.example-chip:focus-visible,
.ghost-button:focus-visible,
.primary-button:focus-visible,
.secondary-button:focus-visible,
.save-button:focus-visible,
.text-button:focus-visible,
.calc-item button:focus-visible {
    outline: none;
    box-shadow: var(--cz-focus);
}

.category-button.is-active {
    border-color: rgba(15, 159, 110, 0.35);
    background: var(--cz-accent-soft);
    color: var(--cz-accent-dark);
}

.workspace {
    min-width: 0;
}

.intro {
    max-width: 780px;
    margin: 0 auto 18px;
    text-align: center;
}

.eyebrow,
.result-kicker {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    padding: 0 10px;
    border-radius: 999px;
    background: var(--cz-blue-soft);
    color: var(--cz-blue);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0;
}

.intro h1 {
    margin: 12px 0 10px;
    color: var(--cz-ink);
    font-size: 2.15rem;
    line-height: 1.08;
    letter-spacing: 0;
}

.intro p {
    max-width: 650px;
    margin: 0 auto;
    color: var(--cz-muted);
    font-size: 1rem;
}

.query-zone {
    max-width: 860px;
    margin: 0 auto 16px;
}

.input-label {
    display: block;
    margin: 0 0 8px;
    color: var(--cz-ink);
    font-size: 0.9rem;
    font-weight: 800;
}

.input-wrap {
    position: relative;
}

#smartInput {
    display: block;
    width: 100%;
    min-height: 138px;
    resize: vertical;
    padding: 20px 84px 20px 20px;
    border: 1px solid var(--cz-border-strong);
    border-radius: var(--cz-radius);
    background: var(--cz-surface);
    color: var(--cz-ink);
    font-size: 1.22rem;
    line-height: 1.42;
    box-shadow: var(--cz-shadow-md);
    transition: border-color 160ms ease, box-shadow 160ms ease;
}

#smartInput::placeholder {
    color: #8a96a8;
}

#smartInput:focus {
    outline: none;
    border-color: rgba(15, 159, 110, 0.75);
    box-shadow: var(--cz-focus), var(--cz-shadow-md);
}

.clear-button {
    position: absolute;
    top: 12px;
    right: 12px;
}

.ghost-button,
.text-button,
.example-chip {
    border: 1px solid var(--cz-border);
    background: var(--cz-surface);
    color: var(--cz-muted);
}

.ghost-button {
    min-height: 36px;
    padding: 0 12px;
    border-radius: var(--cz-radius);
    font-weight: 700;
}

.example-row {
    display: flex;
    gap: 8px;
    min-height: 48px;
    margin-top: 12px;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: thin;
}

.example-chip {
    flex: 0 0 auto;
    min-height: 38px;
    max-width: 280px;
    padding: 0 12px;
    border-radius: 999px;
    color: var(--cz-body);
    font-size: 0.9rem;
    white-space: nowrap;
    transition: border-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.example-chip:hover,
.category-button:hover {
    transform: translateY(-1px);
}

.result-card {
    max-width: 860px;
    min-height: 300px;
    margin: 0 auto;
    padding: 22px;
    border: 1px solid var(--cz-border);
    border-radius: var(--cz-radius);
    background: var(--cz-surface);
    box-shadow: var(--cz-shadow-md);
}

.result-empty {
    display: grid;
    align-content: center;
    min-height: 250px;
    text-align: center;
}

.result-empty h2 {
    margin: 14px 0 8px;
    color: var(--cz-ink);
    font-size: 1.4rem;
    line-height: 1.2;
    letter-spacing: 0;
}

.result-empty p,
.result-summary {
    margin: 0;
    color: var(--cz-muted);
}

.result-content {
    display: grid;
    gap: 18px;
}

.result-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
}

.result-heading h2 {
    margin: 10px 0 0;
    color: var(--cz-ink);
    font-size: 1.3rem;
    line-height: 1.25;
    letter-spacing: 0;
}

.result-value {
    margin: 0;
    color: var(--cz-ink);
    font-size: 2.55rem;
    font-weight: 850;
    line-height: 1.08;
    overflow-wrap: anywhere;
    letter-spacing: 0;
}

.detail-grid {
    display: grid;
    border-top: 1px solid var(--cz-border);
    border-bottom: 1px solid var(--cz-border);
}

.detail-item {
    display: grid;
    grid-template-columns: minmax(120px, 0.62fr) minmax(0, 1fr);
    gap: 14px;
    padding: 12px 0;
    border-top: 1px solid var(--cz-border);
}

.detail-item:first-child {
    border-top: 0;
}

.detail-label {
    color: var(--cz-muted);
    font-size: 0.88rem;
    font-weight: 700;
}

.detail-value {
    min-width: 0;
    color: var(--cz-body);
    font-weight: 750;
    overflow-wrap: anywhere;
}

.result-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.primary-button,
.secondary-button,
.save-button {
    min-height: 42px;
    border-radius: var(--cz-radius);
    font-weight: 800;
    transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.primary-button {
    padding: 0 18px;
    border: 1px solid var(--cz-accent);
    background: var(--cz-accent);
    color: #ffffff;
}

.primary-button:hover {
    background: var(--cz-accent-dark);
    border-color: var(--cz-accent-dark);
    transform: translateY(-1px);
}

.secondary-button,
.save-button {
    padding: 0 14px;
    border: 1px solid var(--cz-border);
    background: var(--cz-surface-soft);
    color: var(--cz-ink);
}

.secondary-button:hover,
.save-button:hover {
    border-color: var(--cz-border-strong);
    background: #ffffff;
    transform: translateY(-1px);
}

.save-button.is-saved {
    border-color: rgba(15, 159, 110, 0.35);
    background: var(--cz-accent-soft);
    color: var(--cz-accent-dark);
}

.side-panel {
    display: grid;
    gap: 16px;
    align-content: start;
}

.panel-section {
    border: 1px solid var(--cz-border);
    border-radius: var(--cz-radius);
    background: var(--cz-surface);
    box-shadow: var(--cz-shadow-sm);
}

.panel-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 16px 10px;
}

.panel-heading h2 {
    margin: 0;
    color: var(--cz-ink);
    font-size: 1rem;
    letter-spacing: 0;
}

.text-button {
    min-height: 32px;
    padding: 0 9px;
    border-radius: var(--cz-radius);
    font-size: 0.82rem;
    font-weight: 800;
}

.calc-list {
    display: grid;
}

.calc-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: stretch;
    border-top: 1px solid var(--cz-border);
}

.calc-item-main,
.calc-item-action {
    border: 0;
    background: transparent;
}

.calc-item-main {
    display: grid;
    gap: 4px;
    min-width: 0;
    padding: 12px 10px 12px 16px;
    text-align: left;
}

.calc-item-query {
    color: var(--cz-ink);
    font-size: 0.9rem;
    font-weight: 760;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.calc-item-result {
    color: var(--cz-muted);
    font-size: 0.84rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.calc-item-action {
    min-width: 54px;
    padding: 0 12px;
    color: var(--cz-muted);
    font-size: 0.78rem;
    font-weight: 850;
}

.calc-item-action:hover {
    color: var(--cz-accent-dark);
}

.empty-state {
    padding: 18px 16px 20px;
    border-top: 1px solid var(--cz-border);
    color: var(--cz-muted);
    font-size: 0.9rem;
}

.app-footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 18px;
    margin: 26px 0 6px;
    color: var(--cz-muted);
    font-size: 0.86rem;
}

@media (max-width: 520px) {
    .app-shell {
        padding: 12px;
    }

    .topbar {
        align-items: flex-start;
    }

    .brand-copy small {
        display: none;
    }

    .status-pill {
        min-height: 30px;
        padding: 0 9px;
        font-size: 0.78rem;
    }

    .intro {
        text-align: left;
    }

    .intro h1 {
        font-size: 1.82rem;
    }

    #smartInput {
        min-height: 130px;
        padding: 18px 18px 58px;
        font-size: 1.06rem;
    }

    .clear-button {
        top: auto;
        right: 12px;
        bottom: 12px;
    }

    .result-card {
        padding: 18px;
    }

    .result-heading {
        display: grid;
    }

    .result-value {
        font-size: 2.05rem;
    }

    .detail-item {
        grid-template-columns: 1fr;
        gap: 3px;
    }

    .result-actions {
        display: grid;
    }
}

@media (min-width: 900px) {
    .app-shell {
        padding: 22px;
    }

    .intro h1 {
        font-size: 2.7rem;
    }

    .result-value {
        font-size: 3.15rem;
    }
}

@media (min-width: 1120px) {
    .app-grid {
        grid-template-columns: 172px minmax(0, 1fr) 330px;
        align-items: start;
    }

    .category-rail {
        position: sticky;
        top: 18px;
        display: grid;
        overflow: visible;
        padding: 8px;
        border: 1px solid var(--cz-border);
        border-radius: var(--cz-radius);
        background: rgba(255, 255, 255, 0.76);
        box-shadow: var(--cz-shadow-sm);
    }

    .category-button {
        justify-content: flex-start;
        border-radius: var(--cz-radius);
    }

    .side-panel {
        position: sticky;
        top: 18px;
        max-height: calc(100vh - 36px);
        overflow: auto;
        padding-right: 2px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}