:root {
    --bg: #f5f7fb;
    --panel: #ffffff;
    --panel-soft: #f8fafc;
    --text: #111827;
    --muted: #667085;
    --line: #d9e2ef;
    --accent: #1f5eff;
    --accent-soft: #e8efff;
    --accent-dark: #143aa2;
    --success: #147a54;
    --success-soft: #e7f6ef;
    --warning: #9a5b00;
    --warning-soft: #fff6dc;
    --danger: #b42318;
    --danger-soft: #fff1f0;
    --shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 10px;
}

* {
    box-sizing: border-box;
}

html {
    min-width: 320px;
    background: var(--bg);
}

body {
    margin: 0;
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.5;
    background:
        radial-gradient(circle at 20% 0%, rgba(31, 94, 255, 0.10), transparent 28rem),
        linear-gradient(180deg, #f8fbff 0%, var(--bg) 38%, #eef3f9 100%);
}

button,
input,
select {
    font: inherit;
}

button {
    cursor: pointer;
}

.app-shell {
    width: min(1420px, calc(100% - 32px));
    margin: 0 auto;
    padding: 32px 0 56px;
}

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 24px;
    align-items: end;
    margin-bottom: 24px;
}

.eyebrow,
.section-kicker {
    margin: 0 0 6px;
    color: var(--accent-dark);
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

h1,
h2,
h3 {
    margin: 0;
    line-height: 1.12;
}

h1 {
    max-width: 760px;
    font-size: clamp(2.25rem, 6vw, 4.8rem);
    letter-spacing: -0.07em;
}

h2 {
    font-size: clamp(1.25rem, 2vw, 1.65rem);
    letter-spacing: -0.03em;
}

h3 {
    font-size: 1rem;
    letter-spacing: -0.01em;
}

.hero-text {
    max-width: 760px;
    margin: 18px 0 0;
    color: var(--muted);
    font-size: clamp(1rem, 2vw, 1.18rem);
}

.hero-panel {
    display: grid;
    gap: 8px;
    padding: 20px;
    color: #183153;
    background: rgba(255, 255, 255, 0.78);
    border: 1px solid rgba(217, 226, 239, 0.88);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
}

.hero-panel span {
    color: var(--muted);
    font-size: 0.95rem;
}

main {
    display: grid;
    gap: 18px;
}

.panel,
.chart-card,
.table-card {
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.panel {
    padding: 22px;
}

.section-heading,
.results-heading,
.chart-card-header,
.scenario-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.compact-heading {
    margin-bottom: 12px;
}

.auto-pill,
.status-line {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    padding: 6px 11px;
    color: var(--accent-dark);
    background: var(--accent-soft);
    border: 1px solid #cfe0ff;
    border-radius: 999px;
    font-size: 0.84rem;
    font-weight: 700;
    white-space: nowrap;
}

.status-line {
    color: var(--muted);
    background: #fff;
    border-color: var(--line);
}

.control-grid,
.saved-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    margin-top: 18px;
}

.saved-grid {
    grid-template-columns: minmax(240px, 1fr) minmax(220px, 1fr) auto;
    align-items: end;
    margin-top: 0;
}

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

.field span {
    color: #344054;
    font-size: 0.88rem;
    font-weight: 800;
}

input,
select {
    width: 100%;
    min-height: 46px;
    padding: 0 13px;
    color: var(--text);
    background: #fff;
    border: 1px solid #cfd8e6;
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

input:focus,
select:focus,
button:focus-visible {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(31, 94, 255, 0.14);
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-end;
}

.button {
    min-height: 46px;
    padding: 0 16px;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-weight: 800;
    transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease, border-color 140ms ease;
}

.button:hover {
    transform: translateY(-1px);
}

.button-primary {
    color: #fff;
    background: var(--accent);
    box-shadow: 0 10px 25px rgba(31, 94, 255, 0.22);
}

.button-secondary {
    color: #16315f;
    background: #eef4ff;
    border-color: #cfe0ff;
}

.button-ghost {
    color: #344054;
    background: #fff;
    border-color: var(--line);
}

.feedback {
    min-height: 24px;
    margin-top: 12px;
    color: var(--muted);
    font-size: 0.92rem;
}

.feedback.success {
    color: var(--success);
}

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

.scenario-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-top: 18px;
}

.scenario-card {
    display: grid;
    gap: 15px;
    padding: 16px;
    background: linear-gradient(180deg, #ffffff, var(--panel-soft));
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
}

.scenario-number {
    display: inline-grid;
    place-items: center;
    width: 32px;
    height: 32px;
    color: var(--accent-dark);
    background: var(--accent-soft);
    border-radius: 50%;
    font-size: 0.86rem;
    font-weight: 900;
}

.badge,
.metric-sub,
.chart-card-header span {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    padding: 5px 8px;
    color: #475467;
    background: #f2f4f7;
    border-radius: 999px;
    font-size: 0.74rem;
    font-weight: 800;
    white-space: nowrap;
}

.badge-reference {
    color: var(--accent-dark);
    background: var(--accent-soft);
}

.badge-good {
    color: var(--success);
    background: var(--success-soft);
}

.results-area {
    display: grid;
    gap: 16px;
    margin-top: 6px;
}

.results-heading {
    padding: 8px 2px 0;
}

.notice,
.warning-list {
    padding: 13px 15px;
    border-radius: var(--radius-md);
    font-weight: 700;
}

.notice-error {
    color: var(--danger);
    background: var(--danger-soft);
    border: 1px solid #ffd0cc;
}

.notice-warning,
.warning-list {
    color: var(--warning);
    background: var(--warning-soft);
    border: 1px solid #ffe5a3;
}

.warning-list ul {
    margin: 0;
    padding-left: 20px;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.metric-card {
    display: grid;
    gap: 10px;
    padding: 18px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: 0 14px 32px rgba(15, 23, 42, 0.06);
}

.metric-label {
    color: var(--muted);
    font-size: 0.82rem;
    font-weight: 900;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.metric-value {
    font-size: clamp(1.55rem, 3vw, 2.3rem);
    font-weight: 900;
    letter-spacing: -0.06em;
}

.metric-sub {
    color: var(--accent-dark);
    background: var(--accent-soft);
}

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

.chart-card,
.table-card {
    padding: 18px;
}

.chart-card-wide {
    grid-column: 1 / -1;
}

.chart-card-header {
    margin-bottom: 16px;
}

.chart-wrap {
    position: relative;
    min-height: 260px;
}

.chart-card-wide .chart-wrap {
    min-height: 220px;
}

.table-card {
    overflow: hidden;
}

.table-scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

table {
    width: 100%;
    min-width: 1040px;
    border-collapse: collapse;
    font-size: 0.92rem;
}

th,
td {
    padding: 13px 12px;
    text-align: right;
    border-bottom: 1px solid #edf1f7;
    vertical-align: top;
}

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

th {
    color: #475467;
    background: #f8fafc;
    font-size: 0.74rem;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

tr.reference-row td {
    background: #f8fbff;
}

.scenario-name-cell {
    display: grid;
    gap: 7px;
}

.badge-row {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.negative {
    color: var(--danger);
}

.positive {
    color: var(--success);
}

[hidden] {
    display: none !important;
}

@media (max-width: 1120px) {
    .hero,
    .control-grid,
    .saved-grid,
    .scenario-grid,
    .metrics-grid,
    .charts-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

@media (max-width: 760px) {
    .app-shell {
        width: min(100% - 22px, 1420px);
        padding: 20px 0 36px;
    }

    .hero,
    .control-grid,
    .saved-grid,
    .scenario-grid,
    .metrics-grid,
    .charts-grid {
        grid-template-columns: 1fr;
    }

    .panel,
    .chart-card,
    .table-card {
        padding: 16px;
        border-radius: 16px;
    }

    .hero {
        align-items: start;
        margin-bottom: 16px;
    }

    .hero-panel {
        padding: 16px;
        border-radius: 16px;
    }

    h1 {
        font-size: clamp(2rem, 13vw, 3.3rem);
        letter-spacing: -0.055em;
    }

    .section-heading,
    .results-heading,
    .chart-card-header,
    .scenario-card-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .scenario-card-header {
        flex-direction: row;
        align-items: center;
    }

    .auto-pill,
    .status-line {
        width: fit-content;
    }

    .saved-grid {
        gap: 14px;
    }

    .button-row {
        justify-content: stretch;
    }

    .button-row .button {
        flex: 1 1 100%;
    }

    input,
    select,
    .button {
        min-height: 48px;
    }

    .metric-value {
        font-size: 1.65rem;
    }

    .chart-wrap {
        min-height: 230px;
    }

    .chart-card-wide .chart-wrap {
        min-height: 210px;
    }

    .chart-card-header span {
        white-space: normal;
    }

    table {
        min-width: 980px;
        font-size: 0.88rem;
    }

    th,
    td {
        padding: 11px 10px;
    }
}

@media (max-width: 430px) {
    .app-shell {
        width: min(100% - 16px, 1420px);
    }

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

    .hero-text {
        font-size: 0.98rem;
    }

    .badge,
    .metric-sub,
    .chart-card-header span {
        font-size: 0.7rem;
    }
}