:root {
    --ink: #111827;
    --ink-soft: #263241;
    --paper: #f7f3ea;
    --line: #d6cbbb;
    --evidence: #1f7a6b;
    --evidence-soft: #dfeee9;
    --reject: #b5472f;
    --reject-soft: #f4dfd8;
    --warn: #c58a19;
    --warn-soft: #f5ead1;
    --steel: #5b6472;
    --white: #fffdf8;
    --shadow: 0 18px 48px rgba(17, 24, 39, 0.16);
}

* {
    box-sizing: border-box;
}

html,
body {
    min-height: 100%;
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    letter-spacing: 0;
}

button,
input {
    font: inherit;
}

button {
    cursor: pointer;
}

button:focus-visible,
input:focus-visible,
a:focus-visible,
.tool-row:focus-visible {
    outline: 3px solid rgba(31, 122, 107, 0.34);
    outline-offset: 2px;
}

svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.trace-app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 22px;
    gap: 14px;
}

.trace-header {
    display: grid;
    grid-template-columns: minmax(260px, 1fr) minmax(340px, 560px);
    gap: 18px;
    align-items: end;
    padding: 18px 20px;
    background: var(--ink);
    color: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.trace-back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #cbd5e1;
    text-decoration: none;
    font-size: 13px;
    font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

.trace-header h1 {
    margin: 8px 0 0;
    font-size: clamp(28px, 4vw, 52px);
    line-height: 0.95;
    font-weight: 760;
    letter-spacing: 0;
}

.session-form {
    display: grid;
    gap: 8px;
}

.session-form label,
.summary-cell span,
.pane-heading p,
.tool-meta,
.state-line,
.field-label {
    font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
    font-size: 12px;
    text-transform: uppercase;
    color: var(--steel);
}

.session-form label {
    color: #cbd5e1;
}

.session-control {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
}

.session-picker {
    position: relative;
    min-width: 0;
}

.session-control input {
    width: 100%;
    min-width: 0;
    height: 42px;
    padding: 0 46px 0 12px;
    border: 1px solid #4b5563;
    border-radius: 6px;
    background: #0b1220;
    color: var(--white);
    font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

.session-picker-button {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 34px;
    height: 34px;
    padding: 0;
    border: 1px solid #334155;
    border-radius: 5px;
    background: #111827;
    color: #cbd5e1;
}

.session-options {
    position: absolute;
    z-index: 20;
    top: 48px;
    left: 0;
    right: 0;
    max-height: 320px;
    overflow: auto;
    padding: 6px;
    border: 1px solid #4b5563;
    border-radius: 8px;
    background: #0b1220;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.32);
}

.session-option {
    width: 100%;
    display: grid;
    gap: 4px;
    padding: 10px;
    border: 1px solid transparent;
    border-radius: 6px;
    background: transparent;
    color: var(--white);
    text-align: left;
}

.session-option:hover,
.session-option.active {
    border-color: #2f8375;
    background: rgba(31, 122, 107, 0.18);
}

.session-option-title {
    font-size: 13px;
    font-weight: 720;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.session-option-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    color: #94a3b8;
    font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
    font-size: 11px;
}

.session-option-empty {
    padding: 12px;
    color: #94a3b8;
    font-size: 13px;
}

.session-control > button {
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 0 14px;
    border: 0;
    border-radius: 6px;
    color: var(--white);
    background: var(--evidence);
    font-weight: 700;
}

.session-control > button:disabled {
    opacity: 0.62;
    cursor: wait;
}

.state-line {
    min-height: 34px;
    display: flex;
    align-items: center;
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--white);
}

.state-line.error {
    color: var(--reject);
    border-color: #dfb2a5;
    background: var(--reject-soft);
}

.state-line.loading {
    color: var(--evidence);
    border-color: #a9d2c8;
    background: var(--evidence-soft);
}

.outcome-panel {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
    gap: 0;
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
    background: var(--white);
}

.outcome-main {
    min-width: 0;
    padding: 20px;
    border-left: 7px solid var(--steel);
}

.outcome-panel.ok .outcome-main {
    border-left-color: var(--evidence);
}

.outcome-panel.warn .outcome-main {
    border-left-color: var(--warn);
}

.outcome-panel.bad .outcome-main {
    border-left-color: var(--reject);
}

.outcome-eyebrow {
    margin: 0 0 8px;
    color: var(--steel);
    font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
    font-size: 12px;
    text-transform: uppercase;
}

.outcome-main h2 {
    margin: 0;
    font-size: clamp(24px, 3vw, 38px);
    line-height: 1.08;
    letter-spacing: 0;
}

.outcome-main > p:not(.outcome-eyebrow) {
    margin: 10px 0 0;
    color: var(--steel);
    line-height: 1.5;
}

.outcome-answer {
    margin-top: 16px;
    padding: 14px 16px;
    max-height: 180px;
    overflow: auto;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: #fffaf1;
    color: #172033;
    line-height: 1.65;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

.outcome-side {
    display: grid;
    grid-template-rows: auto 1fr;
    border-left: 1px solid var(--line);
    background: #fbf7ef;
}

.outcome-verdict {
    padding: 18px;
    border-bottom: 1px solid var(--line);
}

.outcome-verdict span,
.outcome-insights h3 {
    color: var(--steel);
    font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
    font-size: 12px;
    text-transform: uppercase;
}

.outcome-verdict strong {
    display: block;
    margin-top: 6px;
    font-size: 30px;
    line-height: 1.05;
}

.outcome-verdict p {
    margin: 10px 0 0;
    color: var(--ink-soft);
    line-height: 1.5;
}

.outcome-insights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.outcome-insights > div {
    min-width: 0;
    padding: 16px 18px;
}

.outcome-insights > div + div {
    border-left: 1px solid var(--line);
}

.outcome-insights h3 {
    margin: 0 0 10px;
}

.outcome-insights ul {
    margin: 0;
    padding-left: 18px;
}

.outcome-insights li {
    margin-bottom: 8px;
    line-height: 1.45;
    overflow-wrap: anywhere;
}

.summary-strip {
    display: grid;
    grid-template-columns: repeat(7, minmax(120px, 1fr));
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
    background: var(--white);
}

.summary-cell {
    min-width: 0;
    padding: 13px 14px;
    border-right: 1px solid var(--line);
}

.summary-cell:last-child {
    border-right: 0;
}

.summary-cell strong {
    display: block;
    margin-top: 5px;
    font-size: 21px;
    line-height: 1.1;
    overflow-wrap: anywhere;
}

.trace-grid {
    min-height: 0;
    flex: 1;
    display: grid;
    grid-template-columns: minmax(300px, 1.05fr) minmax(300px, 0.95fr) minmax(340px, 1.1fr);
    gap: 14px;
}

.trace-pane {
    min-height: 620px;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
    overflow: hidden;
}

.pane-heading {
    min-height: 74px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--line);
    background: #fbf7ef;
}

.pane-heading p,
.pane-heading h2 {
    margin: 0;
}

.pane-heading h2 {
    margin-top: 3px;
    font-size: 18px;
}

.pane-count {
    min-width: 38px;
    min-height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 5px 9px;
    border-radius: 999px;
    background: var(--ink);
    color: var(--white);
    font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
    font-size: 12px;
}

.trace-rail,
.tool-ledger,
.inspector-stack {
    overflow: auto;
}

.trace-rail {
    position: relative;
    padding: 18px 16px 24px 34px;
}

.trace-rail::before {
    content: "";
    position: absolute;
    left: 23px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--ink);
}

.step-entry {
    position: relative;
    margin-bottom: 14px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: #fffaf1;
}

.step-entry::before {
    content: attr(data-index);
    position: absolute;
    left: -30px;
    top: 12px;
    width: 24px;
    height: 24px;
    display: grid;
    place-items: center;
    border: 2px solid var(--ink);
    border-radius: 50%;
    background: var(--paper);
    color: var(--ink);
    font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
    font-size: 11px;
    font-weight: 800;
}

.step-entry.planner {
    border-left: 5px solid var(--warn);
}

.step-entry.executor {
    border-left: 5px solid var(--evidence);
}

.step-entry.verifier {
    border-left: 5px solid var(--reject);
}

.step-title,
.tool-title {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 10px;
}

.step-title h3,
.tool-title h3 {
    margin: 0;
    font-size: 16px;
    overflow-wrap: anywhere;
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 22px;
    padding: 3px 8px;
    border-radius: 999px;
    font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
    font-size: 11px;
    font-weight: 700;
    white-space: nowrap;
}

.badge.ok {
    color: #0b4f44;
    background: var(--evidence-soft);
}

.badge.warn {
    color: #754d00;
    background: var(--warn-soft);
}

.badge.bad {
    color: #7c2414;
    background: var(--reject-soft);
}

.meta-line {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 9px;
}

.meta-pill {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 7px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--white);
    color: var(--steel);
    font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
    font-size: 11px;
}

details {
    margin-top: 10px;
}

summary {
    color: var(--ink-soft);
    font-weight: 700;
    cursor: pointer;
}

pre,
.answer-box {
    margin: 8px 0 0;
    padding: 10px;
    max-height: 280px;
    overflow: auto;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: #fdf8ee;
    color: #172033;
    font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
    font-size: 12px;
    line-height: 1.55;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

.tool-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 12px 14px;
    border-bottom: 1px solid var(--line);
    background: #fffaf1;
}

.tool-filter {
    min-height: 30px;
    padding: 5px 10px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--white);
    color: var(--ink);
    font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
    font-size: 12px;
}

.tool-filter.active {
    border-color: var(--ink);
    background: var(--ink);
    color: var(--white);
}

.tool-ledger {
    padding: 12px 14px 18px;
}

.tool-row {
    width: 100%;
    display: block;
    margin-bottom: 10px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--white);
    color: inherit;
    text-align: left;
}

.tool-row:hover,
.tool-row.selected {
    border-color: var(--evidence);
    background: #f5fbf8;
}

.tool-row.failed {
    border-color: #e1b4aa;
}

.tool-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin-top: 8px;
    color: var(--steel);
    text-transform: none;
}

.inspector-stack {
    padding: 14px;
}

.inspector-section {
    padding: 0 0 16px;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--line);
}

.inspector-section:last-child {
    margin-bottom: 0;
    border-bottom: 0;
}

.inspector-section h3 {
    margin: 0 0 10px;
    font-size: 15px;
}

.boundary-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.boundary-item,
.fact-row,
.field-row {
    border: 1px solid var(--line);
    border-radius: 6px;
    background: #fffaf1;
}

.boundary-item {
    padding: 10px;
}

.boundary-item strong {
    display: block;
    margin-top: 4px;
    font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
    font-size: 14px;
    overflow-wrap: anywhere;
}

.fact-row {
    padding: 10px;
    margin-bottom: 8px;
}

.fact-row p {
    margin: 0 0 8px;
    line-height: 1.45;
}

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

.field-row {
    padding: 10px;
}

.field-label {
    display: block;
    margin-bottom: 5px;
    color: var(--steel);
}

.empty-panel {
    padding: 14px;
    border: 1px dashed var(--line);
    border-radius: 6px;
    color: var(--steel);
    background: #fffaf1;
}

@media (max-width: 1180px) {
    .outcome-panel {
        grid-template-columns: 1fr;
    }

    .outcome-side {
        border-left: 0;
        border-top: 1px solid var(--line);
    }

    .summary-strip {
        grid-template-columns: repeat(4, minmax(120px, 1fr));
    }

    .summary-cell:nth-child(4) {
        border-right: 0;
    }

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

    .trace-pane {
        min-height: 420px;
    }
}

@media (max-width: 760px) {
    .trace-app {
        padding: 12px;
    }

    .trace-header {
        grid-template-columns: 1fr;
    }

    .session-control {
        grid-template-columns: 1fr;
    }

    .summary-strip {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .outcome-insights {
        grid-template-columns: 1fr;
    }

    .outcome-insights > div + div {
        border-left: 0;
        border-top: 1px solid var(--line);
    }

    .summary-cell,
    .summary-cell:nth-child(4) {
        border-right: 1px solid var(--line);
    }

    .summary-cell:nth-child(2n) {
        border-right: 0;
    }

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

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition: none !important;
        animation: none !important;
    }
}