:root {
    color-scheme: light;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #f5f7f8;
    color: #1d2529;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
}

.boot-fallback,
.boot-error {
    max-width: 720px;
    margin: 32px auto;
    padding: 16px;
    border: 1px solid #d9e0e3;
    border-radius: 8px;
    background: #ffffff;
    color: #39454b;
}

.boot-error {
    border-color: #d78b8b;
    color: #8f2222;
}

.app-shell {
    max-width: 1440px;
    margin: 0 auto;
    padding: 28px;
}

.header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 20px;
    align-items: stretch;
    margin-bottom: 20px;
}

h1,
h2,
p {
    margin: 0;
}

h1 {
    font-size: 34px;
    line-height: 1.12;
    font-weight: 760;
}

h2 {
    font-size: 18px;
    line-height: 1.25;
    margin-bottom: 16px;
}

.header p {
    max-width: 760px;
    margin-top: 8px;
    color: #5b666c;
    line-height: 1.5;
}

.summary-card,
.panel,
.insight,
.formula-panel,
.seo-panel {
    border: 1px solid #d9e0e3;
    background: #ffffff;
    border-radius: 8px;
}

.summary-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 18px;
}

.summary-label,
.field-label {
    color: #667278;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: uppercase;
}

.summary-value {
    margin-top: 8px;
    font-size: 24px;
    font-weight: 760;
}

.summary-total {
    margin-top: 4px;
    color: #1f6f58;
    font-weight: 700;
}

.layout {
    display: grid;
    grid-template-columns: 390px minmax(0, 1fr);
    gap: 20px;
}

.panel {
    padding: 18px;
}

.input-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.input-section {
    margin-top: 4px;
    padding: 12px 0 0;
    border-top: 1px solid #e2e7e9;
    color: #1d2529;
    font-size: 13px;
    font-weight: 800;
}

.input-section:first-child {
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
}

.field {
    display: grid;
    gap: 7px;
    padding-bottom: 4px;
}

.field-help {
    margin: 0;
    color: #5f6a70;
    font-size: 12px;
    line-height: 1.42;
}

.field-error {
    margin: 0;
    color: #a33a3a;
    font-size: 12px;
    line-height: 1.42;
}

.input-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 72px;
    align-items: center;
    border: 1px solid #cfd8dc;
    border-radius: 8px;
    background: #f9fbfb;
    overflow: hidden;
}

.input-row:focus-within {
    border-color: #1f6f58;
    box-shadow: 0 0 0 3px rgba(31, 111, 88, 0.16);
    background: #ffffff;
}

input {
    width: 100%;
    min-width: 0;
    border: 0;
    padding: 10px 12px;
    background: transparent;
    color: #172126;
    font: inherit;
    outline: none;
}

input:focus {
    background: #ffffff;
}

.suffix {
    padding: 10px 10px;
    color: #667278;
    font-size: 12px;
    font-weight: 700;
    text-align: right;
    border-left: 1px solid #d9e0e3;
}

.results-panel {
    min-width: 0;
}

.table-scroll {
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    border: 1px solid #e2e7e9;
    border-radius: 8px;
}

table {
    width: 100%;
    min-width: 980px;
    border-collapse: collapse;
    font-size: 14px;
}

th,
td {
    padding: 11px 10px;
    border-bottom: 1px solid #e2e7e9;
    text-align: right;
    white-space: nowrap;
}

th:first-child,
td:first-child {
    text-align: left;
}

th {
    color: #667278;
    font-size: 12px;
    font-weight: 760;
    text-transform: uppercase;
}

.total-cell {
    font-weight: 800;
    color: #1f6f58;
}

.insights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 16px;
}

.insight {
    padding: 14px;
}

.insight p {
    margin-top: 8px;
    color: #39454b;
    line-height: 1.45;
}

.ranking-list {
    margin: 8px 0 0;
    padding-left: 18px;
    color: #39454b;
    line-height: 1.5;
}

.ranking-list li + li {
    margin-top: 4px;
}

.formula-panel {
    margin-top: 16px;
    padding: 16px;
    overflow: hidden;
    min-width: 0;
    max-width: 100%;
}

.formula-list {
    margin: 0 0 14px;
    padding-left: 18px;
    color: #39454b;
    line-height: 1.5;
}

.formula-list li + li {
    margin-top: 6px;
}

.assumptions-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin: 12px 0 16px;
}

.assumption-item {
    border: 1px solid #e2e7e9;
    border-radius: 8px;
    padding: 12px;
    background: #f9fbfb;
}

.assumption-item p {
    margin-top: 6px;
    color: #39454b;
    font-size: 13px;
    line-height: 1.45;
}

.formula-scroll {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    overflow: hidden;
    -webkit-overflow-scrolling: touch;
    border: 1px solid #e2e7e9;
    border-radius: 8px;
}

.formula-table {
    width: 100%;
    min-width: 0;
    table-layout: fixed;
}

.formula-table th,
.formula-table td {
    white-space: normal;
    line-height: 1.45;
    vertical-align: top;
}

.formula-table td:first-child {
    width: 120px;
    white-space: nowrap;
}

.formula-table th:first-child {
    width: 120px;
}

.formula-expression {
    display: block;
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
}

.referral-panel {
    margin-top: 16px;
    padding: 16px;
    border: 1px solid #c8ddd3;
    background: #f8fbf9;
    border-radius: 8px;
    overflow: hidden;
}

.referral-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 180px;
    gap: 14px;
    align-items: stretch;
    margin-bottom: 14px;
}

.referral-header p,
.lead-box p,
.funnel-card p {
    color: #39454b;
    line-height: 1.45;
}

.referral-badge,
.funnel-card,
.lead-box,
.metrics-panel,
.metric {
    border: 1px solid #d9e0e3;
    background: #ffffff;
    border-radius: 8px;
}

.referral-badge {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 14px;
}

.funnel-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.funnel-card,
.lead-box,
.metrics-panel {
    padding: 14px;
}

.lead-box,
.metrics-panel {
    margin-top: 12px;
}

.lead-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin: 14px 0;
}

.text-input-row {
    grid-template-columns: minmax(0, 1fr);
}

.primary-button,
.secondary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    border: 1px solid transparent;
    border-radius: 8px;
    padding: 9px 13px;
    font: inherit;
    font-weight: 760;
    cursor: pointer;
}

.primary-button {
    margin-top: 12px;
    background: #1f6f58;
    color: #ffffff;
}

.secondary-button {
    background: #ffffff;
    color: #1d2529;
    border-color: #cfd8dc;
}

.ref-code {
    margin-top: 12px;
    padding: 12px;
    border: 1px dashed #8aa99b;
    border-radius: 8px;
    background: #eef7f2;
    color: #14513f;
    font-weight: 800;
    overflow-x: auto;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 10px;
}

.metric {
    padding: 12px;
}

.metric-value {
    display: block;
    margin-top: 6px;
    color: #1f6f58;
    font-size: 20px;
    font-weight: 800;
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.preset-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin: 0 0 12px;
}

.preset-item {
    min-width: 0;
}

.preset-item .secondary-button {
    width: 100%;
}

.preset-description {
    margin-top: 6px;
    color: #526168;
    font-size: 12px;
    line-height: 1.4;
}

.export-box {
    max-height: 220px;
    margin-top: 12px;
    padding: 12px;
    overflow: auto;
    border: 1px solid #e2e7e9;
    border-radius: 8px;
    background: #f9fbfb;
    color: #39454b;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 12px;
    line-height: 1.45;
    white-space: pre;
}

.seo-panel {
    margin-top: 16px;
    padding: 16px;
}

.seo-panel > p {
    color: #39454b;
    line-height: 1.55;
}

.seo-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 14px;
}

.seo-item,
.faq-item {
    border: 1px solid #e2e7e9;
    border-radius: 8px;
    padding: 12px;
    background: #fbfcfc;
}

.seo-item p,
.faq-item p {
    margin-top: 7px;
    color: #39454b;
    line-height: 1.45;
}

.faq-list {
    display: grid;
    gap: 10px;
    margin-top: 12px;
}

@media (max-width: 980px) {
    .app-shell {
        padding: 18px;
    }

    .header,
    .layout,
    .insights,
    .referral-header,
    .funnel-grid,
    .lead-grid,
    .assumptions-list,
    .preset-row,
    .seo-grid {
        grid-template-columns: 1fr;
    }

    .results-panel {
        overflow: hidden;
    }

    .metrics-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 560px) {
    h1 {
        font-size: 26px;
    }

    .panel,
    .summary-card {
        padding: 14px;
    }

    .metrics-grid {
        grid-template-columns: 1fr;
    }
}