/* Project pages (projects/<slug>/ -> /<slug>/): clean academic layout in the style of Nerfies-type pages. */

@font-face {
    font-family: "Noto Sans";
    src: url("assets/fonts/NotoSans-400.woff2") format("woff2");
    font-weight: 400;
    font-display: swap;
}
@font-face {
    font-family: "Noto Sans";
    src: url("assets/fonts/NotoSans-600.woff2") format("woff2");
    font-weight: 600;
    font-display: swap;
}
@font-face {
    font-family: "Noto Sans";
    src: url("assets/fonts/NotoSans-700.woff2") format("woff2");
    font-weight: 700;
    font-display: swap;
}

:root {
    --text: #363636;
    --text-soft: #4a4a4a;
    --muted: #7a7a7a;
    --line: #e6e6e6;
    --panel: #f5f5f5;
    --panel-2: #fafafa;
    --dark: #363636;
    --link: #3273dc;
    --ours: #3273dc;
    --ours-soft: #e8f0fc;
    --ok: #2f855a;
    --ok-soft: #e6f4ea;
    --diff: #b7791f;
    --diff-soft: #fdf3e1;
    --gt: #48c78e;
    --perception: #3273dc;
    --trigger: #9f5bd3;
    --label: #2f855a;
    --radius: 10px;
    --focus: #ffb000;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background: #fff;
    color: var(--text);
    font-family: "Noto Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    font-size: 17px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--link);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 2px;
}
img,
video {
    max-width: 100%;
    display: block;
}
code,
pre {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.86em;
}
p code,
li code {
    background: var(--panel);
    padding: 0.1em 0.35em;
    border-radius: 4px;
}

.skip-link {
    position: absolute;
    left: 0.5rem;
    top: -3rem;
    padding: 0.4rem 0.8rem;
    background: #fff;
    border: 1px solid var(--line);
    z-index: 10;
}
.skip-link:focus {
    top: 0.5rem;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ---------- Hero ---------- */

.hero {
    padding: 56px 0 24px;
    text-align: center;
}
.hero-short {
    margin: 0 0 6px;
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ours);
}
.hero-title {
    margin: 0 auto 18px;
    max-width: 880px;
    font-size: clamp(28px, 4.2vw, 42px);
    line-height: 1.2;
    font-weight: 700;
    color: var(--dark);
}
.hero-authors {
    margin: 0 0 4px;
    font-size: 19px;
}
.hero-affils {
    margin: 0 0 4px;
    color: var(--muted);
    font-size: 15px;
}
.hero-affils span + span::before {
    content: " · ";
}
.hero-venue {
    margin: 4px 0 20px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-soft);
}
.hero-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 8px 18px;
    border-radius: 999px;
    background: var(--dark);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    line-height: 1.2;
}
.btn:hover {
    background: #222;
    text-decoration: none;
}
.btn.is-disabled {
    background: #dbdbdb;
    color: #6b6b6b;
    cursor: not-allowed;
}
.btn small {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 1px 6px;
    border-radius: 999px;
    background: rgba(0, 0, 0, 0.08);
}
.icon {
    width: 17px;
    height: 17px;
    flex: none;
}

/* ---------- Teaser & TL;DR ---------- */

.teaser {
    padding-bottom: 8px;
}
.tldr {
    display: flex;
    gap: 14px;
    align-items: baseline;
    margin: 22px 0 8px;
    padding: 16px 20px;
    border-left: 4px solid var(--ours);
    background: var(--ours-soft);
    border-radius: 0 var(--radius) var(--radius) 0;
}
.tldr-label {
    flex: none;
    font-weight: 700;
    color: var(--ours);
    letter-spacing: 0.04em;
}
.tldr p {
    margin: 0;
    font-size: 18px;
}
.detail-toggle {
    text-align: right;
}
#toggle-details {
    font: inherit;
    font-size: 14px;
    padding: 5px 14px;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: #fff;
    color: var(--text-soft);
    cursor: pointer;
}
#toggle-details[aria-pressed="true"] {
    background: var(--dark);
    border-color: var(--dark);
    color: #fff;
}

/* ---------- Sections ---------- */

.section {
    padding-top: 44px;
}
.section-title {
    margin: 0 0 18px;
    text-align: center;
    font-size: 30px;
    line-height: 1.25;
    font-weight: 700;
    color: var(--dark);
}
.section p {
    margin: 0 0 14px;
    color: var(--text-soft);
}
.bullets {
    padding-left: 1.2em;
    color: var(--text-soft);
}
.bullets li {
    margin-bottom: 8px;
}

/* Go deeper */
.deeper {
    margin-top: 14px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--panel-2);
}
.deeper > summary {
    cursor: pointer;
    padding: 12px 18px;
    font-weight: 600;
    color: var(--dark);
    list-style: none;
}
.deeper > summary::-webkit-details-marker {
    display: none;
}
.deeper > summary::before {
    content: "+";
    display: inline-block;
    width: 1.2em;
    font-weight: 700;
    color: var(--ours);
}
.deeper[open] > summary::before {
    content: "−";
}
.deeper-body {
    padding: 0 18px 8px;
}

/* ---------- Figures & placeholders ---------- */

.figure {
    margin: 18px 0 22px;
}
.figure-media {
    width: 100%;
    height: auto;
    border-radius: var(--radius);
    object-fit: cover;
    background: var(--panel);
}
.figure figcaption {
    margin-top: 8px;
    text-align: center;
    font-size: 14.5px;
    color: var(--muted);
}
.placeholder {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 18px;
    text-align: center;
    border: 2px dashed #c9c9c9;
    border-radius: var(--radius);
    background: repeating-linear-gradient(45deg, #fafafa 0 14px, #f3f3f3 14px 28px);
    color: #8a8a8a;
    overflow: hidden;
}
.placeholder .icon {
    width: 34px;
    height: 34px;
    opacity: 0.7;
}
.placeholder-kind {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.12em;
}
.placeholder-file {
    font-size: 13px;
    color: #6b6b6b;
    background: #fff;
    padding: 1px 8px;
    border-radius: 999px;
    border: 1px solid #e0e0e0;
}
.placeholder-todo {
    max-width: 560px;
    margin: 4px 0 0 !important;
    font-size: 13.5px !important;
    line-height: 1.45;
    color: #8a8a8a !important;
}

/* ---------- Steps (Perception -> Trigger -> Label) ---------- */

.steps {
    list-style: none;
    display: flex;
    align-items: stretch;
    gap: 10px;
    padding: 0;
    margin: 18px 0;
}
.step {
    flex: 1;
    position: relative;
    padding: 18px 18px 14px;
    border-radius: var(--radius);
    background: var(--panel);
}
.step:nth-child(1) {
    border-top: 4px solid var(--perception);
}
.step:nth-child(3) {
    border-top: 4px solid var(--trigger);
}
.step:nth-child(5) {
    border-top: 4px solid var(--label);
}
.step-num {
    display: inline-grid;
    place-items: center;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--dark);
    color: #fff;
    font-size: 14px;
    font-weight: 700;
}
.step h3 {
    margin: 8px 0 4px;
    font-size: 19px;
}
.step p {
    margin: 0 !important;
    font-size: 15.5px;
}
.step-arrow {
    align-self: center;
    font-size: 24px;
    color: var(--muted);
}

/* ---------- Explorer ---------- */

.explorer {
    margin: 18px 0 8px;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--panel-2);
}
.explorer-images {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-bottom: 14px;
}
.thumb,
.chip {
    font: inherit;
    cursor: pointer;
    border-radius: 999px;
    border: 1px solid #d5d5d5;
    background: #fff;
    color: var(--text-soft);
}
.thumb {
    padding: 6px 16px;
    font-size: 15px;
    font-weight: 600;
}
.thumb[aria-selected="true"] {
    background: var(--dark);
    border-color: var(--dark);
    color: #fff;
}
.explorer-panel {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 22px;
    align-items: start;
}
.explorer-panel + .explorer-panel {
    margin-top: 28px;
}
.js .explorer-panel + .explorer-panel {
    margin-top: 0;
}
.js .explorer-panel[hidden] {
    display: none;
}
.explorer-panel-title {
    margin: 0 0 6px;
    font-size: 17px;
}
.js .explorer-panel-title {
    display: none;
}
.explorer-media .figure {
    margin: 0;
}
.emotion-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
}
.chip {
    padding: 4px 12px;
    font-size: 14px;
}
.chip:hover {
    border-color: var(--dark);
}
.chip[aria-selected="true"] {
    background: var(--dark);
    border-color: var(--dark);
    color: #fff;
}
.chip.is-gt {
    box-shadow: inset 0 0 0 2px var(--gt);
}
.chip.is-gt::after {
    content: " ★";
    color: var(--gt);
}
.gt-pill {
    display: inline-block;
    padding: 0 8px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    color: #fff;
    background: var(--gt);
    vertical-align: 0.1em;
}
.justification > summary {
    cursor: pointer;
    padding: 6px 0;
    color: var(--dark);
}
.js .justification > summary {
    display: none;
}
.js .justification:not([open]) {
    display: none;
}
.jst {
    padding: 14px 16px;
    border-radius: var(--radius);
    background: #fff;
    border: 1px solid var(--line);
}
.jst-part {
    margin: 0 0 10px !important;
    font-size: 15.5px;
    line-height: 1.6;
}
.jst-part:last-child {
    margin-bottom: 0 !important;
}
.jst-tag {
    display: inline-block;
    margin-right: 4px;
    padding: 0 8px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: #fff;
    vertical-align: 0.1em;
}
.tag-perception {
    background: var(--perception);
}
.tag-trigger {
    background: var(--trigger);
}
.tag-label {
    background: var(--label);
}
@media (prefers-reduced-motion: no-preference) {
    .jst {
        animation: fade-in 0.25s ease-out;
    }
}
@keyframes fade-in {
    from {
        opacity: 0;
        transform: translateY(4px);
    }
}

/* ---------- Results ---------- */

.stats {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin: 18px 0 22px;
}
.stat {
    padding: 16px 14px;
    border-radius: var(--radius);
    background: var(--panel);
    text-align: center;
}
.stat-value {
    font-size: 30px;
    font-weight: 700;
    line-height: 1.1;
    color: var(--ours);
}
.stat-label {
    margin-top: 6px;
    font-weight: 600;
    font-size: 15px;
    color: var(--dark);
}
.stat-note {
    margin-top: 2px;
    font-size: 13px;
    color: var(--muted);
    line-height: 1.4;
}
.bars {
    margin: 10px 0 20px;
}
.bars figcaption {
    margin-bottom: 10px;
    text-align: center;
    font-size: 14.5px;
    color: var(--muted);
}
.bar-row {
    display: grid;
    grid-template-columns: 170px minmax(0, 1fr) 70px;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
    font-size: 15px;
}
.bar-label {
    text-align: right;
    color: var(--text-soft);
}
.bar-track {
    height: 22px;
    border-radius: 6px;
    background: var(--panel);
    overflow: hidden;
}
.bar-fill {
    display: block;
    height: 100%;
    border-radius: 6px;
    background: #b5b5b5;
}
.bar-row.is-ours .bar-fill {
    background: var(--ours);
}
.bar-row.is-ours .bar-label,
.bar-row.is-ours .bar-value {
    font-weight: 700;
    color: var(--dark);
}
.bar-value {
    font-variant-numeric: tabular-nums;
    color: var(--text-soft);
}

.table-wrap {
    overflow-x: auto;
    margin: 12px 0 18px;
}
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14.5px;
    font-variant-numeric: tabular-nums;
}
caption {
    caption-side: bottom;
    padding-top: 8px;
    font-size: 13.5px;
    color: var(--muted);
    text-align: left;
}
th,
td {
    padding: 7px 10px;
    border-bottom: 1px solid var(--line);
    text-align: right;
    white-space: nowrap;
}
thead th {
    border-bottom: 2px solid #cfcfcf;
    font-weight: 700;
    color: var(--dark);
}
th[scope="row"],
thead th:first-child {
    text-align: left;
    font-weight: 600;
}
tbody tr:nth-child(even) {
    background: var(--panel-2);
}

.math {
    overflow-x: auto;
    margin: 12px 0 16px;
    padding: 16px;
    border-radius: var(--radius);
    background: #fff;
    border: 1px solid var(--line);
    font-size: 19px;
}

/* ---------- Cases ---------- */

.cases-title {
    margin: 22px 0 10px;
    font-size: 20px;
    color: var(--dark);
}
.cases {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
}
.case {
    padding: 12px;
    border-radius: var(--radius);
    background: var(--panel-2);
    border: 1px solid var(--line);
}
.case .figure {
    margin: 0 0 10px;
}
.case-labels {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 8px;
}
.tag {
    padding: 1px 9px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
}
.tag-gt {
    background: #ececec;
    color: var(--text-soft);
}
.tag-ok {
    background: var(--ok-soft);
    color: var(--ok);
}
.tag-diff {
    background: var(--diff-soft);
    color: var(--diff);
}
.case-note {
    font-size: 14.5px;
    font-style: italic;
}
.case-text {
    font-size: 14.5px;
    line-height: 1.55;
    margin-bottom: 0 !important;
}

/* ---------- Code / BibTeX ---------- */

.code-block {
    position: relative;
    margin: 12px 0;
}
.code-label {
    font-size: 13px;
    font-weight: 700;
    color: var(--muted);
    margin-bottom: 4px;
}
.code-block pre {
    margin: 0;
    padding: 16px 18px;
    border-radius: var(--radius);
    background: var(--panel);
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
    line-height: 1.5;
}
.copy-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    font: inherit;
    font-size: 13px;
    padding: 3px 12px;
    border-radius: 999px;
    border: 1px solid #d5d5d5;
    background: #fff;
    cursor: pointer;
}

/* ---------- Footer ---------- */

.footer {
    margin-top: 56px;
    padding: 28px 0 40px;
    background: var(--panel-2);
    border-top: 1px solid var(--line);
    text-align: center;
    font-size: 15px;
}
.footer p {
    margin: 0 0 6px;
}
.footer-small {
    font-size: 13px;
    color: var(--muted);
}

/* ---------- Small screens ---------- */

@media (max-width: 760px) {
    body {
        font-size: 16px;
    }
    .hero {
        padding-top: 36px;
    }
    .steps {
        flex-direction: column;
    }
    .step-arrow {
        transform: rotate(90deg);
        margin: -4px 0;
    }
    .explorer {
        padding: 12px;
    }
    .explorer-panel {
        grid-template-columns: minmax(0, 1fr);
        gap: 12px;
    }
    .stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .bar-row {
        grid-template-columns: 110px minmax(0, 1fr) 62px;
        font-size: 13.5px;
    }
    .section-title {
        font-size: 25px;
    }
    .tldr {
        flex-direction: column;
        gap: 4px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}