:root {
    --bg: #f4efe6;
    --panel: rgba(255, 251, 245, 0.88);
    --panel-strong: rgba(255, 251, 246, 0.96);
    --ink: #1f2430;
    --muted: #616b78;
    --line: rgba(31, 36, 48, 0.12);
    --accent: #0e6d68;
    --accent-strong: #0a4744;
    --accent-soft: rgba(14, 109, 104, 0.12);
    --warm: #c96d32;
    --good: #2d8f4a;
    --bad: #b84f4f;
    --shadow: 0 24px 60px rgba(40, 52, 69, 0.12);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    font-family: "Aptos", "Segoe UI", sans-serif;
    background:
        radial-gradient(circle at top left, rgba(255, 255, 255, 0.7), transparent 24%),
        linear-gradient(145deg, #f7f1e8 0%, #f1e2cf 42%, #d9ece5 100%);
}

button,
input,
select {
    font: inherit;
}

.ambient {
    position: fixed;
    width: 360px;
    height: 360px;
    border-radius: 50%;
    filter: blur(28px);
    opacity: 0.45;
    pointer-events: none;
}

.ambient-left {
    top: -110px;
    left: -80px;
    background: rgba(201, 109, 50, 0.32);
}

.ambient-right {
    right: -120px;
    bottom: 20px;
    background: rgba(14, 109, 104, 0.22);
}

.page-shell {
    position: relative;
    z-index: 1;
    width: min(1240px, calc(100% - 32px));
    margin: 0 auto;
    padding: 32px 0 48px;
}

.hero-card,
.tab-card,
.panel {
    border: 1px solid rgba(255, 255, 255, 0.55);
    border-radius: 28px;
    background: var(--panel);
    box-shadow: var(--shadow);
    backdrop-filter: blur(14px);
}

.hero-card {
    display: grid;
    grid-template-columns: minmax(0, 1.8fr) minmax(260px, 0.9fr);
    gap: 24px;
    padding: 28px;
}

.eyebrow {
    margin: 0 0 12px;
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.hero-card h1,
.section-head h2,
.table-head h3 {
    margin: 0;
}

.hero-card h1 {
    max-width: 11ch;
    line-height: 0.98;
    font-size: clamp(3rem, 7vw, 5.6rem);
}

.hero-copy {
    max-width: 60ch;
    margin: 18px 0 0;
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.7;
}

.hero-summary {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    gap: 12px;
    padding: 24px;
    border-radius: 24px;
    color: white;
    background: linear-gradient(160deg, rgba(10, 71, 68, 0.98), rgba(14, 109, 104, 0.92));
}

.hero-summary p,
.hero-summary strong {
    margin: 0;
}

.hero-summary p {
    color: rgba(255, 255, 255, 0.76);
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 0.76rem;
}

.hero-summary strong {
    font-size: 1.6rem;
    line-height: 1.2;
}

.tab-card {
    margin-top: 22px;
    padding: 18px;
}

.tab-strip {
    display: inline-flex;
    gap: 10px;
    padding: 8px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.6);
}

.tab-button {
    min-height: 46px;
    padding: 0 20px;
    border: 0;
    border-radius: 999px;
    background: transparent;
    color: var(--muted);
    font-weight: 700;
    cursor: pointer;
}

.tab-button.is-active {
    background: var(--accent);
    color: white;
}

.tab-panel {
    margin-top: 18px;
}

.section-head,
.table-head,
.action-row,
.inline-control,
.matrix-input-header,
.matrix-row-label,
.matrix-input-cell {
    display: flex;
    align-items: center;
}

.section-head,
.table-head {
    justify-content: space-between;
    gap: 16px;
}

.section-head {
    margin-bottom: 18px;
}

.section-head h2 {
    font-size: clamp(1.5rem, 3.2vw, 2.3rem);
}

.action-row {
    gap: 12px;
    flex-wrap: wrap;
}

.primary-button,
.secondary-button {
    min-height: 46px;
    padding: 0 18px;
    border-radius: 14px;
    border: 0;
    cursor: pointer;
    font-weight: 700;
}

.primary-button {
    background: var(--accent);
    color: white;
}

.primary-button:disabled {
    cursor: not-allowed;
    opacity: 0.55;
}

.secondary-button {
    background: rgba(255, 255, 255, 0.7);
    color: var(--ink);
    border: 1px solid var(--line);
}

.split-layout {
    display: grid;
    gap: 18px;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
}

.panel {
    padding: 22px;
}

.table-head p,
.message,
.metric-card span,
.metric-card small {
    color: var(--muted);
}

.table-head p {
    margin: 6px 0 0;
}

.message {
    margin-bottom: 14px;
    padding: 12px 14px;
    border-radius: 14px;
    font-weight: 600;
}

.message-error {
    background: rgba(184, 79, 79, 0.12);
    color: #8e3434;
}

.table-wrap {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 12px 10px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: middle;
}

.data-table th {
    color: var(--muted);
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.data-table td input {
    width: 100%;
    min-width: 84px;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.9);
}

.row-state {
    font-weight: 700;
    font-size: 0.92rem;
}

.row-state-valid {
    color: var(--good);
}

.row-state-invalid {
    color: var(--bad);
}

.row-delete {
    min-width: 38px;
    min-height: 38px;
    border-radius: 10px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.7);
    cursor: pointer;
}

.results-panel {
    background: var(--panel-strong);
}

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

.metric-card {
    padding: 16px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.76);
    border: 1px solid rgba(255, 255, 255, 0.55);
}

.metric-card span,
.metric-card small {
    display: block;
}

.metric-card strong {
    display: block;
    margin-top: 8px;
    font-size: 1.7rem;
}

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

.chart-shell {
    margin-top: 18px;
    padding: 14px;
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.72);
}

.chart-shell canvas {
    width: 100%;
    height: auto;
    display: block;
}

.matrix-controls select,
.inline-control select {
    margin-left: 10px;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.9);
}

.matrix-input-shell {
    display: grid;
    gap: 12px;
}

.matrix-input-grid {
    display: grid;
    gap: 10px;
}

.matrix-input-header,
.matrix-input-row {
    display: grid;
    grid-template-columns: 120px repeat(var(--class-count), minmax(68px, 1fr));
    gap: 10px;
}

.matrix-axis,
.matrix-row-label {
    padding: 10px 12px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.72);
    font-weight: 700;
}

.matrix-axis {
    justify-content: center;
    color: var(--muted);
}

.matrix-row-label {
    justify-content: flex-start;
}

.matrix-input-cell input {
    width: 100%;
    min-height: 54px;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 16px;
    text-align: center;
    font-weight: 700;
    background: rgba(255, 255, 255, 0.92);
}

.matrix-input-cell.diagonal input {
    background: rgba(45, 143, 74, 0.14);
    border-color: rgba(45, 143, 74, 0.26);
}

.matrix-input-cell.off-diagonal input {
    background: rgba(184, 79, 79, 0.1);
    border-color: rgba(184, 79, 79, 0.18);
}

.matrix-layout {
    margin-top: 18px;
}

@media (max-width: 980px) {
    .hero-card,
    .split-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 720px) {
    .page-shell {
        width: min(100% - 18px, 1240px);
        padding-top: 18px;
    }

    .hero-card,
    .tab-card,
    .panel {
        padding: 18px;
    }

    .section-head,
    .table-head {
        flex-direction: column;
        align-items: flex-start;
    }

    .matrix-input-header,
    .matrix-input-row {
        grid-template-columns: 88px repeat(var(--class-count), minmax(60px, 1fr));
        gap: 8px;
    }

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