:root {
    color-scheme: light;
    --paper: #f3f1ea;
    --surface: #faf9f4;
    --ink: #171714;
    --muted: #66645d;
    --line: #c9c6bc;
    --line-soft: #dedbd2;
    --accent: #d58f0b;
    --accent-soft: #f1dfb9;
    --danger: #a33b2f;
    --font-sans: "Inter", "Segoe UI", Arial, sans-serif;
    --font-mono: "Recursive", "Cascadia Mono", Consolas, monospace;
}

html {
    background: var(--paper);
}

body {
    min-width: 320px;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.35;
}

body,
button,
input,
select,
textarea {
    font-variant-numeric: tabular-nums;
}

.app {
    width: min(1600px, 100%);
    min-height: 100vh;
    margin: 0 auto;
    padding: 0 30px 32px;
}

.topbar {
    min-height: 74px;
    margin: 0;
    padding: 0 2px;
    align-items: center;
    border-bottom: 1px solid var(--line);
}

.eyebrow {
    display: none;
}

h1 {
    color: var(--ink);
    font-size: clamp(25px, 2.3vw, 34px);
    font-weight: 650;
    letter-spacing: -0.025em;
}

h2,
h3 {
    color: var(--ink);
}

.status-pill {
    min-height: auto;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: var(--ink);
    font-size: 14px;
}

.layout {
    grid-template-columns: 372px minmax(0, 1fr);
    gap: 0;
    align-items: stretch;
}

.panel {
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}

.controls {
    position: relative;
    top: auto;
    padding: 28px 26px 32px 2px;
    border-right: 1px solid var(--line);
}

.results-panel {
    min-width: 0;
    min-height: 720px;
    padding: 34px 0 36px 48px;
}

.section {
    padding: 22px 0;
    border-top: 1px solid var(--line);
}

.section:first-of-type {
    padding-top: 0;
}

.section h2,
.section h3,
.result-label,
.limits-title {
    margin: 0 0 15px;
    color: var(--ink);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.form-grid {
    grid-template-columns: 1fr 1fr;
    gap: 17px 14px;
}

.form-field-full {
    grid-column: 1 / -1;
}

label {
    margin-bottom: 6px;
    color: var(--ink);
    font-size: 13px;
    font-weight: 600;
}

input[type="number"],
input[type="file"],
textarea,
select {
    min-height: 40px;
    padding: 8px 9px;
    border: 1px solid var(--line);
    border-radius: 2px;
    background: var(--surface);
    color: var(--ink);
    transition: border-color 120ms ease, outline-color 120ms ease;
}

input[type="number"]:focus,
input[type="file"]:focus,
textarea:focus,
select:focus,
button:focus-visible,
summary:focus-visible {
    border-color: var(--ink);
    box-shadow: none;
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

input:disabled,
select:disabled {
    background: #ebe8df;
    color: var(--muted);
}

input[type="file"] {
    padding: 7px;
    color: var(--muted);
}

#minCurrent,
#mvStep {
    font-family: var(--font-mono);
    font-variation-settings: "MONO" 1, "CASL" 0;
    font-weight: 500;
}

.field-note {
    margin: 5px 0 0;
    color: var(--muted);
    font-size: 11px;
}

.file-line {
    min-height: 22px;
    margin-top: 7px;
}

.file-line .field-note {
    display: none;
}

#fileName {
    color: var(--muted);
    font-size: 12px;
}

.offset-toolbar {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    margin-bottom: 12px;
}

.button-row {
    gap: 5px;
}

.offset-toolbar .ghost-btn {
    min-width: 38px;
    padding: 0 8px;
    font-size: 12px;
}

.offset-inputs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    border-top: 1px solid var(--line);
    border-left: 1px solid var(--line);
}

.offset-input {
    padding: 8px;
    border: 0;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    background: var(--surface);
}

.offset-input label {
    margin-bottom: 3px;
    color: var(--muted);
    font-size: 10px;
    text-align: center;
}

.offset-input input {
    min-height: 28px;
    padding: 2px;
    border: 0;
    background: transparent;
    color: var(--ink);
    font-family: var(--font-mono);
    font-variation-settings: "MONO" 1, "CASL" 0;
    font-size: 20px;
    font-weight: 500;
}

.source-details {
    border-top: 1px solid var(--line);
}

.source-details summary {
    padding: 16px 0;
    color: var(--muted);
    cursor: pointer;
    font-size: 13px;
    list-style-position: outside;
}

.source-details[open] summary {
    color: var(--ink);
}

.source-details textarea {
    min-height: 150px;
    font-family: var(--font-mono);
    font-variation-settings: "MONO" 1, "CASL" 0;
    font-size: 11px;
}

.actions {
    grid-template-columns: 1fr auto;
    margin-top: 14px;
}

button {
    min-height: 40px;
    border: 1px solid transparent;
    border-radius: 2px;
    font-weight: 600;
    transition: background 120ms ease, color 120ms ease, border-color 120ms ease;
}

button:hover,
button:active {
    transform: none;
}

.primary-btn {
    background: var(--accent);
    color: var(--ink);
}

.primary-btn:hover {
    background: #e4a62c;
}

.ghost-btn {
    padding: 0 12px;
    border-color: var(--line);
    background: transparent;
    color: var(--ink);
}

.ghost-btn:hover {
    border-color: var(--ink);
    background: transparent;
}

.progress-wrap {
    margin-top: 12px;
}

.progress-head {
    color: var(--muted);
    font-size: 11px;
    font-weight: 500;
}

.progress-track {
    height: 3px;
    border: 0;
    border-radius: 0;
    background: var(--line-soft);
}

.progress-bar {
    border-radius: 0;
    background: var(--accent);
}

.empty-state {
    min-height: 610px;
    place-items: start;
    padding-top: 48px;
    border: 0;
    border-radius: 0;
    background: transparent;
    text-align: left;
}

.empty-state-inner {
    width: min(520px, 100%);
    padding: 0;
}

.empty-icon {
    display: none;
}

.empty-state h2 {
    margin-bottom: 9px;
    font-size: clamp(32px, 5vw, 54px);
    font-weight: 500;
    letter-spacing: -0.035em;
}

.empty-state p {
    color: var(--muted);
    font-size: 17px;
}

.message {
    padding: 12px 0;
    border: 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    background: transparent;
    color: var(--ink);
    font-weight: 500;
}

.message.error {
    border-color: var(--danger);
    background: transparent;
    color: var(--danger);
}

.result-v2 {
    width: 100%;
}

.result-head {
    margin-bottom: 34px;
}

.result-headline {
    max-width: 900px;
    margin: 0 0 10px;
    color: var(--ink);
    font-size: clamp(38px, 5vw, 62px);
    font-weight: 520;
    letter-spacing: -0.045em;
    line-height: 1.02;
}

.result-subtitle {
    max-width: 780px;
    margin: 0;
    color: var(--muted);
    font-size: 18px;
}

.result-notes {
    display: grid;
    gap: 4px;
    margin: -17px 0 28px;
    color: var(--muted);
    font-size: 12px;
}

.residual-section {
    margin-bottom: 31px;
}

.residual-table {
    display: grid;
    gap: 0;
}

.residual-row,
.residual-axis {
    display: grid;
    grid-template-columns: 112px 88px minmax(260px, 1fr);
    align-items: center;
    min-height: 34px;
}

.residual-core {
    color: var(--ink);
    font-weight: 600;
    white-space: nowrap;
}

.residual-value {
    color: var(--ink);
    text-align: right;
}

.residual-track {
    position: relative;
    height: 100%;
    margin-left: 22px;
    border-bottom: 1px dotted var(--line);
}

.residual-track::before,
.residual-track::after {
    position: absolute;
    top: 0;
    bottom: -1px;
    width: 1px;
    content: "";
}

.residual-track::before {
    left: var(--zero);
    background: var(--ink);
}

.residual-track::after {
    left: var(--threshold);
    border-left: 1px dashed var(--accent);
}

.residual-dot {
    position: absolute;
    top: 50%;
    left: var(--position);
    width: 10px;
    height: 10px;
    border: 1px solid var(--surface);
    border-radius: 50%;
    background: #5d5d58;
    transform: translate(-50%, -50%);
}

.residual-dot.high {
    background: var(--accent);
}

.residual-axis {
    min-height: 43px;
    color: var(--muted);
    font-size: 11px;
}

.axis-track {
    position: relative;
    height: 100%;
    margin-left: 22px;
    border-top: 1px solid var(--ink);
}

.axis-mark {
    position: absolute;
    top: 8px;
    transform: translateX(-50%);
    white-space: nowrap;
}

.axis-mark.threshold {
    color: #744800;
}

.summary-strip {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-bottom: 27px;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.summary-stat {
    min-width: 0;
    padding: 20px 19px 21px 4px;
    border-right: 1px solid var(--line);
}

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

.summary-stat-label {
    display: block;
    margin-bottom: 4px;
    color: var(--muted);
    font-size: 11px;
}

.summary-stat-value {
    display: block;
    color: var(--ink);
    font-family: var(--font-mono);
    font-variation-settings: "MONO" 1, "CASL" 0;
    font-size: clamp(20px, 2.3vw, 30px);
    font-weight: 520;
    white-space: nowrap;
}

.limits-v2 {
    padding-bottom: 25px;
    border-bottom: 1px solid var(--line);
}

.limit-row {
    display: grid;
    grid-template-columns: 96px minmax(180px, 1fr) 54px;
    align-items: center;
    min-height: 28px;
    gap: 15px;
}

.limit-track {
    height: 8px;
    background: var(--line-soft);
}

.limit-fill {
    height: 100%;
    background: var(--accent);
}

.result-actions-v2 {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding-top: 20px;
}

.next-step-kicker {
    margin-bottom: 4px;
    color: #744800;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.offset-decision {
    color: var(--ink);
    font-size: 18px;
}

.next-step-copy {
    margin: 3px 0 8px;
    color: var(--muted);
    font-size: 13px;
}

.trial-list-v2 {
    display: flex;
    flex-wrap: wrap;
    gap: 7px 14px;
    color: var(--muted);
    font-family: var(--font-mono);
    font-variation-settings: "MONO" 1, "CASL" 0;
    font-size: 12px;
}

.trial-list-v2 strong {
    color: var(--ink);
}

.result-actions-v2 .primary-btn {
    padding-inline: 18px;
}

.advanced-results {
    margin-top: 28px;
    border-top: 1px solid var(--line);
}

.advanced-results summary {
    padding: 15px 0;
    color: var(--muted);
    cursor: pointer;
    font-size: 12px;
}

.detail-grid {
    display: grid;
    grid-template-columns: 140px minmax(0, 1fr);
    gap: 8px 22px;
    margin-bottom: 22px;
    font-size: 12px;
}

.detail-grid span {
    color: var(--muted);
}

.detail-grid strong {
    min-width: 0;
    overflow-wrap: anywhere;
    font-weight: 600;
}

.advanced-results table {
    margin-bottom: 20px;
}

table {
    color: var(--ink);
}

th,
td {
    border-color: var(--line-soft);
}

th {
    color: var(--muted);
}

.positive,
.negative {
    color: var(--ink);
}

.copy-box {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    font-family: var(--font-mono);
    font-variation-settings: "MONO" 1, "CASL" 0;
    white-space: nowrap;
}

@media (max-width: 1040px) {
    .app {
        padding: 0 20px 28px;
    }

    .layout {
        grid-template-columns: 320px minmax(0, 1fr);
    }

    .controls {
        padding-right: 20px;
    }

    .results-panel {
        padding-left: 30px;
    }

    .residual-row,
    .residual-axis {
        grid-template-columns: 100px 76px minmax(210px, 1fr);
    }
}

@media (max-width: 780px) {
    .app {
        padding: 0 16px 24px;
    }

    .topbar {
        min-height: 65px;
    }

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

    .controls {
        padding: 22px 0 25px;
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

    .results-panel {
        min-height: 520px;
        padding: 28px 0;
    }

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

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

    .summary-stat:nth-child(-n+2) {
        border-bottom: 1px solid var(--line);
    }

    .residual-row,
    .residual-axis {
        grid-template-columns: 96px 72px minmax(180px, 1fr);
    }

    .result-actions-v2 {
        align-items: flex-start;
        flex-direction: column;
    }

    .button-row {
        display: flex;
        grid-template-columns: none;
    }
}

@media (max-width: 480px) {
    .app {
        padding-inline: 12px;
    }

    .topbar {
        align-items: flex-start;
        flex-direction: column;
        justify-content: center;
        gap: 3px;
        padding-block: 12px;
    }

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

    .form-field-full {
        grid-column: auto;
    }

    .offset-inputs {
        grid-template-columns: repeat(4, minmax(62px, 1fr));
        overflow-x: auto;
    }

    .residual-table {
        overflow-x: visible;
    }

    .residual-row,
    .residual-axis {
        min-width: 0;
        grid-template-columns: 92px 70px minmax(0, 1fr);
        column-gap: 6px;
    }

    .residual-track,
    .axis-track {
        margin-left: 10px;
    }

    .limit-row {
        grid-template-columns: 70px minmax(140px, 1fr) 44px;
        gap: 9px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .progress-wrap.indeterminate .progress-bar {
        animation: none;
    }

    * {
        scroll-behavior: auto;
    }
}