/* Hallmark · macrostructure: Marquee Hero · tone: technical · theme: Plain · anchor hue: blue · nav: N9 · footer: Ft2 */
/* Hallmark · source-level critique: P4 H4 E3 S5 R4 V4; rendered viewport QA not performed. */
/* User reference: BFM-Zero motion backdrop + academic paper information. */
* { box-sizing: border-box; }
html, body { margin: 0; overflow-x: clip; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { background: var(--color-paper); color: var(--color-ink); font: 400 var(--text-body)/1.65 var(--font-body); }
button, a { -webkit-tap-highlight-color: var(--color-transparent); }
a { color: inherit; text-underline-offset: .25em; }
button { font: inherit; cursor: pointer; }
a:focus-visible, button:focus-visible, summary:focus-visible, video:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 5px; }
button:disabled, [aria-disabled="true"] { cursor: default; }
button:active:not(:disabled), a:active { opacity: .8; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.18; letter-spacing: -.035em; font-style: normal; min-width: 0; overflow-wrap: anywhere; }
p, h1, h2, h3, ul { margin-top: 0; }
img, video { max-width: 100%; display: block; }
[hidden] { display: none !important; }
.skip-link { position: absolute; z-index: 20; left: 16px; top: -100px; padding: 12px 20px; background: var(--color-paper); }
.skip-link:focus { top: 12px; }
.hero { height: var(--wall-height, 100svh); position: relative; isolation: isolate; background: var(--color-dark); color: var(--color-white); display: grid; align-items: center; }
.motion-wall { position: absolute; inset: 0; display: grid; grid-template-columns: repeat(var(--wall-columns, 6), minmax(0, 1fr)); grid-template-rows: repeat(var(--wall-rows, 4), minmax(0, 1fr)); gap: 0; background: var(--color-motion-backdrop); z-index: -3; }
.motion-tile { position: relative; container-type: inline-size; min-width: 0; min-height: 0; padding: 0; border: 0; }
.motion-label { position: absolute; z-index: 2; left: 50%; top: 50%; transform: translate(-50%, -50%); width: 94%; color: var(--color-white); opacity: .18; font: 700 clamp(1.125rem, 11cqw, 4rem)/1.05 var(--font-display); letter-spacing: -.035em; text-align: center; text-wrap: balance; pointer-events: none; }
.motion-tile video { width: 100%; height: 100%; object-fit: contain; object-position: center; min-height: 0; min-width: 0; border: 0; border-radius: 0; }
.motion-tile.failed video { opacity: .25; }
.hero-shade { position: absolute; inset: 0; z-index: 1; pointer-events: none; background: radial-gradient(ellipse 60% 32% at 50% 62%, oklch(8% 0.02 250 / .58), oklch(8% 0.02 250 / .3) 48%, transparent 100%), linear-gradient(180deg, var(--color-veil-edge), var(--color-veil) 30%, var(--color-veil) 65%, var(--color-veil-edge)); }
.hero-nav { position: absolute; top: 0; width: 100%; display: flex; align-items: center; justify-content: space-between; padding: 24px 40px; gap: 16px; }
.hero-nav a { text-decoration: none; min-height: 44px; display: inline-flex; align-items: center; gap: 12px; white-space: nowrap; }
.wordmark { font-family: var(--font-display); font-weight: 700; font-size: 1.3rem; letter-spacing: -.05em; text-decoration: none; }
.brand-mark { color: inherit; margin-left: 5px; }
.hero-copy { padding: 100px 24px; text-align: center; }
.hero-copy h1 { font-size: clamp(4rem, 10.8vw, 10rem); font-weight: 650; line-height: 1; margin-bottom: 40px; letter-spacing: -.075em; }
.hero-copy h1 span { font-weight: 400; }
.hero-copy p { max-width: 840px; margin: 0 auto; color: var(--color-white); font-size: clamp(1.25rem, 2.15vw, 1.875rem); font-weight: 650; line-height: 1.4; letter-spacing: .005em; text-shadow: 0 1px 2px oklch(0% 0 0 / .95), 0 2px 12px oklch(0% 0 0 / .85); text-wrap: balance; }
.hero-bottom { position: absolute; bottom: 20px; left: 40px; right: 40px; display: flex; align-items: center; justify-content: flex-end; gap: 16px; font-size: var(--text-sm); }
.hero-bottom p { margin: 0; color: var(--color-hero-muted); }
.hero-bottom button { background: var(--color-dark); color: var(--color-white); border: 1px solid var(--color-hero-line); padding: 8px 16px; min-height: 44px; border-radius: var(--radius-sm); white-space: nowrap; }
.hero-bottom button:hover { background: var(--color-wall); }
.section { max-width: 1200px; margin: 0 auto; padding: 64px 40px; }
.paper { text-align: center; padding-top: 76px; padding-bottom: 60px; }
.paper-inner { max-width: 1020px; margin: auto; }
.project-name { color: var(--color-accent); font-family: var(--font-display); font-weight: 600; font-size: 1.4rem; margin-bottom: 16px; }
.paper h2 { font-size: clamp(2rem, 1.5rem + 2vw, 3rem); margin-bottom: 30px; }
.authors { color: var(--color-accent); font-size: clamp(1.1rem, 1.05rem + 0.25vw, 1.25rem); margin-bottom: 8px; }
.author-name { white-space: nowrap; }
.author-name sup { font-size: .68em; margin-left: .12em; }
.team { color: var(--color-muted); font-size: clamp(0.95rem, 0.9rem + 0.2vw, 1.05rem); margin-bottom: 2px; }
.author-notes { color: var(--color-muted); font-size: var(--text-sm); margin-bottom: 26px; }
.resource-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.resource-link { display: inline-flex; align-items: center; gap: 8px; border-radius: 100px; background: var(--color-ink); border: 1px solid var(--color-ink); color: var(--color-white); min-height: 44px; padding: 10px 22px; text-decoration: none; white-space: nowrap; font-size: var(--text-sm); font-weight: 500; }
.resource-icon { width: 20px; height: 20px; flex: none; }
a.resource-link:hover { background: var(--color-accent); border-color: var(--color-accent); }
.resource-link[aria-disabled="true"] { background: var(--color-soft); color: var(--color-muted); border-color: var(--color-line); }
.resource-link small { font: inherit; opacity: .85; }
.release-note { margin: 20px auto 0; color: var(--color-muted); font-size: var(--text-sm); }

/* Section general */
.abstract-section, .overview-section, .framework-section, .dataset-section, .evaluation-section { border-top: 1px solid var(--color-line); }
.section-heading { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: 40px; align-items: end; margin-bottom: 32px; }
.section-heading h2 { font-size: var(--text-heading); margin-bottom: 0; }
.section-heading p { color: var(--color-muted); margin: 0; max-width: 54ch; font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem); line-height: 1.6; }
.evaluation-section .section-heading { grid-template-columns: minmax(0, 1fr); gap: 12px; align-items: start; }
.evaluation-section .section-heading p { max-width: none; }

/* Unified Split Layout: Figure + Concise Text */
.split-layout { display: grid; gap: 36px; align-items: start; }

/* Paper Figures */
.paper-figure { margin: 0; background: var(--color-paper); border: 1px solid var(--color-line); border-radius: var(--radius-sm); padding: 14px; box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03); }
.paper-figure img { width: 100%; max-width: 100%; height: auto; object-fit: contain; display: block; border-radius: calc(var(--radius-sm) - 2px); }
.paper-figure figcaption { margin-top: 12px; font-size: var(--text-sm); color: var(--color-muted); line-height: 1.5; padding: 0 2px; }
.paper-figure figcaption strong { color: var(--color-ink); font-weight: 600; }

/* 1. Abstract Split: 42% Fig 1, 58% Abstract Text */
.abstract-split { grid-template-columns: minmax(0, 42fr) minmax(0, 58fr); gap: 36px; align-items: center; }
.abstract-split .abstract-body { max-width: none; }
.abstract-split .abstract-body p { color: var(--color-ink); font-size: clamp(0.96rem, 0.91rem + 0.2vw, 1.06rem); line-height: 1.7; margin-bottom: 0; }
.abstract-split .abstract-body p + p { margin-top: 14px; }
.abstract-split .abstract-body strong { color: var(--color-ink); font-weight: 650; }

/* 2. Overview Split: 60% Fig 4, 40% Levels Text */
.overview-split { grid-template-columns: minmax(0, 60fr) minmax(0, 40fr); gap: 32px; align-items: center; }
.overview-levels { display: flex; flex-direction: column; gap: 12px; }
.compact-level { background: var(--color-soft); border: 1px solid var(--color-line); border-left: 3px solid var(--color-accent); border-radius: var(--radius-sm); padding: 14px 16px; }
.compact-level-header { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; flex-wrap: wrap; }
.level-badge { font-family: var(--font-display); font-weight: 700; font-size: 0.75rem; padding: 2px 7px; border-radius: 4px; background: var(--color-paper); border: 1px solid var(--color-line); color: var(--color-accent); text-transform: uppercase; letter-spacing: 0.03em; }
.compact-level h3 { font-size: clamp(1.025rem, 0.98rem + 0.18vw, 1.15rem); margin: 0; color: var(--color-ink); }
.compact-level .task-count { margin-left: auto; font-size: 0.8125rem; color: var(--color-muted); }
.compact-level p { color: var(--color-muted); font-size: clamp(0.84rem, 0.81rem + 0.12vw, 0.9rem); line-height: 1.5; margin: 0; }

/* 3. Evaluation Framework Split: 52% Fig 5, 48% Metrics Text */
.framework-split { grid-template-columns: minmax(0, 52fr) minmax(0, 48fr); gap: 32px; align-items: center; }
.framework-summary { display: flex; flex-direction: column; gap: 12px; }
.metric-card { background: var(--color-soft); border: 1px solid var(--color-line); border-radius: var(--radius-sm); padding: 14px 18px; }
.metric-header { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.metric-badge { font-family: var(--font-display); font-weight: 700; font-size: 0.75rem; padding: 2px 7px; border-radius: 4px; background: var(--color-paper); border: 1px solid var(--color-line); color: var(--color-accent); text-transform: uppercase; letter-spacing: 0.03em; }
.metric-card h4 { font-family: var(--font-display); font-size: 1.05rem; margin: 0; color: var(--color-ink); }
.metric-card p { color: var(--color-muted); font-size: clamp(0.84rem, 0.81rem + 0.12vw, 0.9rem); line-height: 1.5; margin: 0; }
.metric-primary { border-color: var(--color-accent); background: var(--color-paper); }
.metric-primary .metric-badge { background: var(--color-accent); color: var(--color-white); border-color: var(--color-accent); }
.formula-line { font-family: var(--font-display); font-size: 1.08rem !important; color: var(--color-accent) !important; margin-bottom: 4px !important; }
.cases-section { background: var(--color-soft); }
.case-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; align-items: start; }
.case-navigation { display: flex; flex-wrap: wrap; gap: 4px 28px; border-block: 1px solid var(--color-line); padding: 10px 0; }
.case-navigation a { text-decoration: none; color: var(--color-ink); padding: 8px 0; font-weight: 600; }
.case-navigation span { display: inline; margin-left: 8px; color: var(--color-muted); font-size: var(--text-sm); font-weight: 400; }
.case-intro { max-width: 88ch; color: var(--color-muted); font-size: var(--text-sm); margin: 12px 0 0; }
.case-level-section { margin-top: 40px; }
.case-level-heading { font-size: clamp(1.5rem, 2.5vw, 1.9rem); margin-bottom: 6px; }
.level-intro { margin: 0 0 20px; }
.level-description { color: var(--color-ink); width: 100%; max-width: none; font-size: var(--text-body); line-height: 1.65; margin: 0 0 10px; }
.level-points { list-style: none; padding: 0; margin: 0 0 16px; display: flex; flex-direction: column; gap: 8px; }
.level-points li { position: relative; padding-left: 20px; color: var(--color-muted); font-size: var(--text-sm); line-height: 1.6; }
.level-points li::before { content: "•"; position: absolute; left: 4px; color: var(--color-accent); font-weight: bold; font-size: 1.1em; }
.level-points strong { color: var(--color-ink); font-weight: 600; }
.level-subdescription { color: var(--color-muted); font-size: var(--text-body); line-height: 1.65; margin: 0 0 16px; }
.level-subdescription strong { color: var(--color-ink); font-weight: 600; }
.family-description { color: var(--color-ink); width: 100%; max-width: none; font-size: var(--text-body); line-height: 1.65; margin: 0 0 16px; }
.case-family { margin-top: 22px; }
.family-heading { font: 600 1.2rem/1.3 var(--font-display); border-bottom: 1px solid var(--color-line); padding-bottom: 10px; margin: 0 0 8px; }
.task-index { display: flex; flex-wrap: wrap; gap: 0 16px; margin: 0 0 12px; }
.task-index a { font-size: var(--text-sm); color: var(--color-accent); padding: 6px 0; }
.case { min-width: 0; background: var(--color-paper); border: 1px solid var(--color-line); border-radius: var(--radius-sm); overflow: clip; }
.case-header, .case-input, .case-output, .case-footer { padding: 16px; }
.modality-tabs { display: flex; flex-wrap: wrap; gap: 0 12px; padding: 0 16px; border-bottom: 1px solid var(--color-line); background: var(--color-paper); }
.modality-tab { border: 0; border-bottom: 2px solid var(--color-transparent); padding: 10px 0; min-height: 44px; background: none; color: var(--color-muted); font-size: var(--text-sm); line-height: 1.3; white-space: nowrap; }
.modality-tab:hover { color: var(--color-accent); }
.modality-tab[aria-selected="true"] { color: var(--color-accent); border-bottom-color: var(--color-accent); font-weight: 600; }
.case-variant-panel { min-width: 0; }
.case-header { padding-bottom: 12px; }
.case-title { font: 600 1.25rem/1.25 var(--font-display); letter-spacing: -.03em; margin: 0 0 6px; }
.case-purpose { color: var(--color-muted); margin-bottom: 0; }
.case-input { background: var(--color-soft); border-right: 1px solid var(--color-line); }
.case-block-title { font: 600 .875rem/1.4 var(--font-display); color: var(--color-ink); margin: 0 0 10px; }
.case .input-label { color: var(--color-accent); font-weight: 600; margin: 0 0 6px; }
.input-item + .input-item { margin-top: 12px; }
.input-text { white-space: pre-line; overflow-wrap: anywhere; }
.input-item img { width: 100%; max-height: 200px; object-fit: contain; background: var(--color-paper); }
.input-item video { width: 100%; max-height: 220px; background: var(--color-wall); }
.input-item audio { width: 100%; }
.case-constraint { border-left: 3px solid var(--color-accent); padding: 8px 10px; background: var(--color-paper); margin: 12px 0 0; }
.case-constraint p:last-child { margin: 0; }
.case-duration { font-size: var(--text-sm); color: var(--color-muted); margin: 18px 0 4px; }
.action-sequence { display: flex; padding: 0; list-style-position: inside; gap: 8px; margin: 12px 0 0; }
.action-sequence li { flex: 1; border-top: 2px solid var(--color-accent); padding-top: 8px; font-size: var(--text-sm); }
.task-timeline { display: flex; gap: 3px; margin-bottom: 10px; }
.task-timeline span { flex-basis: 0; min-width: 0; padding: 6px 3px; white-space: pre-line; font-size: .75rem; line-height: 1.5; text-align: center; }
.timeline-condition { background: var(--color-soft); border: 1px solid var(--color-line); }
.timeline-target { background: var(--color-accent); color: var(--color-white); }
.interval-status { color: var(--color-muted); margin: 6px 0 0; }
.interval-status.is-target { color: var(--color-accent); font-weight: 600; }
.case .motion-note { margin: 10px 0 0; color: var(--color-muted); }
.package-info table { border-collapse: collapse; width: 100%; font-size: .75rem; }
.package-info caption { text-align: left; padding: 8px 0; }
.package-info td, .package-info th { text-align: left; padding: 8px 4px; border-bottom: 1px solid var(--color-line); overflow-wrap: anywhere; }
.package-info th { color: var(--color-ink); }
.package-path code { font-size: .75rem; overflow-wrap: anywhere; }
.case-footer { border-top: 0; padding-top: 0; padding-bottom: 8px; font-size: .75rem; color: var(--color-muted); }
.case-id { font-family: var(--font-code); font-size: .6875rem !important; overflow-wrap: anywhere; margin-bottom: 8px; }
.case-footer a { display: inline-block; min-height: 32px; color: var(--color-accent); }
.interleaved-grid { grid-template-columns: minmax(0, 1fr); }
.interleaved-inputs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; align-items: start; }
.interleaved-inputs .input-item { margin-top: 0; }
.interleaved-grid .case-output { min-width: 0; margin: 0; }
.case-media { aspect-ratio: 4/3; background: var(--color-wall); border-radius: var(--radius-sm); overflow: clip; }
.case-media video { width: 100%; height: 100%; object-fit: contain; }
.case-level { color: var(--color-accent); margin: 0 0 6px; font-size: var(--text-sm); }
.case h3 { font-size: 1.35rem; margin-bottom: 12px; }
.case p { font-size: var(--text-sm); line-height: 1.5; }
.case details { color: var(--color-muted); font-size: var(--text-sm); }
.case summary { cursor: pointer; min-height: 40px; padding: 8px 0; }
.case details p { padding-top: 8px; margin-bottom: 0; overflow-wrap: anywhere; }
.case .media-error { padding: 12px; color: var(--color-ink); background: var(--color-paper); }
.dataset-header-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); gap: 48px; align-items: start; }
.dataset-header-grid h2 { font-size: var(--text-heading); margin-bottom: 16px; }
.dataset-header-grid p { color: var(--color-muted); font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem); line-height: 1.65; max-width: 52ch; margin-bottom: 0; }
.dataset-actions { display: flex; flex-wrap: wrap; gap: 20px; align-items: center; margin-top: 24px; }
.text-link { color: var(--color-accent); display: inline-flex; min-height: 44px; align-items: center; gap: 8px; font-weight: 600; font-size: var(--text-sm); text-decoration: none; border-bottom: 1px solid transparent; }
.text-link:hover { border-bottom-color: var(--color-accent); }
.hf-section-link { color: var(--color-ink); }
.hf-section-link:hover { color: var(--color-accent); border-bottom-color: var(--color-accent); }
.dataset-tree { background: var(--color-soft); padding: 28px; border: 1px solid var(--color-line); border-radius: var(--radius-sm); }
.tree-root { font-weight: 600; font-size: clamp(1rem, 0.95rem + 0.2vw, 1.1rem); padding-bottom: 16px; border-bottom: 1px solid var(--color-line); }
.tree-branch { display: grid; gap: 4px; padding: 16px 0 0 20px; border-left: 1px solid var(--color-line); margin-left: 8px; }
.tree-branch span { font-size: var(--text-sm); color: var(--color-muted); }
.dataset-tree p { font-size: var(--text-sm); margin: 20px 0 0; }

/* Hugging Face Resources */
.hf-resources { border-top: 1px solid var(--color-line); padding-top: 36px; margin-top: 40px; }
.hf-resources-title { font-size: clamp(1.25rem, 1.15rem + 0.35vw, 1.5rem); margin-bottom: 8px; font-family: var(--font-display); }
.hf-resources-intro { color: var(--color-muted); font-size: var(--text-sm); margin-bottom: 20px; }
.hf-cards-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.hf-card { display: flex; flex-direction: column; background: var(--color-soft); border: 1px solid var(--color-line); border-radius: var(--radius-sm); padding: 22px; text-decoration: none; color: inherit; transition: border-color var(--dur-short) var(--ease-out), background var(--dur-short) var(--ease-out), transform var(--dur-short) var(--ease-out); }
.hf-card-primary { grid-column: span 2; }
.hf-card:hover { border-color: var(--color-accent); background: var(--color-paper); transform: translateY(-2px); }
.hf-card-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.hf-badge { display: inline-block; font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-accent); background: var(--color-paper); border: 1px solid var(--color-line); padding: 3px 8px; border-radius: 4px; }
.hf-arrow { font-size: 1.1rem; color: var(--color-muted); transition: color var(--dur-short) var(--ease-out), transform var(--dur-short) var(--ease-out); }
.hf-card:hover .hf-arrow { color: var(--color-accent); transform: translate(2px, -2px); }
.hf-card h4 { font-family: var(--font-display); font-size: clamp(1.05rem, 1rem + 0.2vw, 1.18rem); margin: 0 0 10px; letter-spacing: -0.02em; color: var(--color-ink); overflow-wrap: anywhere; }
.hf-card p { font-size: var(--text-sm); color: var(--color-muted); line-height: 1.55; margin: 0; flex-grow: 1; }

/* Level 2 Evaluation */
.eval-constraint-picker { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 20px; }
.eval-constraint-picker button { min-height: 40px; padding: 7px 14px; border: 1px solid var(--color-line); border-radius: 4px; background: var(--color-paper); color: var(--color-ink); font-size: var(--text-sm); }
.eval-constraint-picker button:hover, .eval-constraint-picker button[aria-pressed="true"] { border-color: var(--color-accent); color: var(--color-accent); background: var(--color-soft); }
.eval-constraint-picker button[aria-pressed="true"] { box-shadow: inset 0 -2px var(--color-accent); font-weight: 600; }
.eval-card { background: var(--color-paper); border: 1px solid var(--color-line); border-radius: var(--radius-sm); overflow: hidden; }
.eval-tabs { display: flex; border-bottom: 1px solid var(--color-line); background: var(--color-soft); }
.eval-tab { flex: 1; display: flex; flex-direction: column; align-items: flex-start; text-align: left; min-height: 90px; padding: 16px 22px; border: 0; border-bottom: 2px solid transparent; background: transparent; }
.eval-tab:hover:not(.active) { background: var(--color-paper); }
.eval-tab.active { background: var(--color-paper); border-bottom-color: var(--color-accent); }
.tab-badge { font-size: .6875rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: var(--color-muted); margin-bottom: 4px; }
.eval-tab.active .tab-badge { color: var(--color-accent); }
.tab-title { font-family: var(--font-display); font-size: 1.05rem; font-weight: 600; color: var(--color-ink); margin-bottom: 3px; }
.tab-subtitle { font-size: .75rem; color: var(--color-muted); line-height: 1.35; }
.eval-panel { padding: 26px; }
.eval-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 28px; align-items: start; }
.eval-form { display: flex; flex-direction: column; gap: 18px; }
.eval-field { display: flex; flex-direction: column; gap: 6px; }
.eval-label { font-size: .8125rem; font-weight: 600; color: var(--color-ink); }
.official-example { min-width: 0; }
.official-example-state { display: flex; align-items: center; justify-content: space-between; gap: 14px; min-height: 96px; padding: 16px; border: 1px solid var(--color-line); border-radius: 6px; background: var(--color-soft); }
.official-example-state[data-state="error"] { border-color: #efb5b5; background: #fff7f7; }
.official-example-state p { margin: 0; color: var(--color-muted); font-size: .8125rem; line-height: 1.5; }
.official-example-state[hidden], .official-example-content[hidden], .eval-custom-fields[hidden] { display: none; }
.official-example-content { display: flex; flex-direction: column; gap: 16px; padding: 18px; border: 1px solid var(--color-line); border-radius: 6px; background: color-mix(in srgb, var(--color-soft) 55%, var(--color-paper)); }
.official-example-heading { display: flex; flex-direction: column; gap: 6px; }
.official-example-heading h3 { margin: 0; color: var(--color-ink); font-family: var(--font-display); font-size: 1.15rem; }
.official-example-badge { width: fit-content; padding: 3px 8px; border: 1px solid color-mix(in srgb, var(--color-accent) 35%, var(--color-line)); border-radius: 999px; background: var(--color-paper); color: var(--color-accent); font-size: .6875rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; }
.official-example-meta, .official-vlm-config { display: grid; gap: 10px; margin: 0; }
.official-example-meta > div, .official-vlm-config > div { display: grid; gap: 3px; }
.official-example-meta dt, .official-vlm-config dt { color: var(--color-muted); font-size: .6875rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }
.official-example-meta dd, .official-vlm-config dd { margin: 0; color: var(--color-ink); font-size: .8125rem; line-height: 1.5; overflow-wrap: anywhere; }
.official-vlm-config { grid-template-columns: repeat(2, minmax(0, 1fr)); padding-top: 14px; border-top: 1px solid var(--color-line); }
.official-asset-ready { display: flex; align-items: center; gap: 8px; margin: 0; padding: 10px 12px; border: 1px solid #bbf7d0; border-radius: 4px; background: #f0fdf4; color: #166534; font-size: .775rem; font-weight: 600; }
.eval-custom-fields { display: flex; flex-direction: column; gap: 18px; }
.field-hint { font-size: .725rem; color: var(--color-muted); line-height: 1.4; }
.eval-upload-group { gap: 10px; }
.eval-upload-intro, .eval-contract-note { margin: 0; font-size: .775rem; line-height: 1.5; color: var(--color-muted); }
.eval-upload-intro code, .eval-contract-note code, .csv-upload-slot .eval-label code { font-family: var(--font-code); font-size: .92em; color: var(--color-ink); }
.csv-upload-list { display: grid; gap: 10px; }
.csv-upload-slot { display: flex; flex-direction: column; gap: 6px; padding: 12px; border: 1px solid var(--color-line); border-radius: 6px; background: color-mix(in srgb, var(--color-soft) 60%, var(--color-paper)); }
.csv-upload-slot .eval-dropzone { padding: 14px 12px; background: var(--color-paper); }
.csv-upload-slot .eval-file-actions button { min-height: 30px; }
.file-slot-note.warning { color: #9a5b00; font-weight: 600; }
.eval-contract-note { padding: 10px 12px; border-left: 3px solid var(--color-line); background: var(--color-soft); }
.eval-select, .eval-input { width: 100%; min-height: 42px; padding: 9px 12px; font-family: var(--font-body); font-size: .875rem; border: 1px solid var(--color-line); border-radius: 4px; background: var(--color-paper); color: var(--color-ink); }
.eval-input[readonly] { background: var(--color-soft); color: var(--color-muted); cursor: default; }
.eval-select:focus-visible, .eval-input:focus-visible, .eval-dropzone:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; }
.eval-dropzone { border: 1.5px dashed var(--color-line); border-radius: 6px; padding: 22px 16px; text-align: center; background: var(--color-soft); cursor: pointer; position: relative; }
.eval-dropzone:hover, .eval-dropzone.drag-over, .eval-dropzone.has-file { border-color: var(--color-accent); }
.dropzone-input { position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; height: 100%; z-index: 1; }
.dropzone-input:disabled { cursor: wait; }
.dropzone-content { display: flex; flex-direction: column; align-items: center; gap: 4px; pointer-events: none; }
.dropzone-icon { font-size: 1.4rem; }
.dropzone-text { font-size: .8125rem; font-weight: 600; color: var(--color-ink); overflow-wrap: anywhere; }
.dropzone-sub { font-size: .6875rem; color: var(--color-muted); }
.eval-file-actions { display: flex; gap: 12px; }
.eval-file-actions button { min-height: 36px; border: 0; background: transparent; color: var(--color-accent); font-size: .75rem; font-weight: 600; padding: 4px 0; }
.eval-file-actions button:hover { text-decoration: underline; }
.eval-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 4px; }
.btn-eval, .btn-reset, .btn-mode-switch, .btn-retry { min-height: 42px; padding: 9px 18px; border-radius: 4px; font-family: var(--font-body); font-size: .875rem; }
.btn-eval { font-weight: 600; background: var(--color-accent); color: var(--color-white); border: 1px solid var(--color-accent); }
.btn-eval:hover { opacity: .9; }
.btn-eval:disabled { opacity: .6; cursor: wait; }
.btn-reset, .btn-mode-switch, .btn-retry { background: var(--color-paper); color: var(--color-muted); border: 1px solid var(--color-line); }
.btn-mode-switch { color: var(--color-accent); border-color: color-mix(in srgb, var(--color-accent) 45%, var(--color-line)); font-weight: 600; }
.btn-reset:hover, .btn-mode-switch:hover, .btn-retry:hover { background: var(--color-soft); color: var(--color-ink); }
.eval-result-card { background: var(--color-soft); border: 1px solid var(--color-line); border-radius: 6px; padding: 22px; min-height: 290px; display: flex; flex-direction: column; justify-content: center; }
.result-placeholder { text-align: center; padding: 20px 14px; margin: auto; }
.result-placeholder .placeholder-icon { font-size: 1.8rem; }
.result-placeholder h4 { font-size: 1rem; margin: 10px 0 6px; color: var(--color-ink); }
.result-placeholder p { font-size: .8125rem; color: var(--color-muted); max-width: 36ch; margin: 0 auto; line-height: 1.5; }
.eval-result-card[data-state="invalid-input"] { border-color: #f5c16c; }
.eval-result-card[data-state="backend-error"] { border-color: #efb5b5; }
.eval-result-card[data-state="failure"] { border-color: #fecaca; }
.result-container { display: flex; flex-direction: column; gap: 14px; width: 100%; text-align: left; }
.result-header { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 8px; border-bottom: 1px solid var(--color-line); padding-bottom: 10px; }
.result-timestamp { font-size: .75rem; color: var(--color-muted); overflow-wrap: anywhere; }
.result-status-banner { padding: 12px 14px; border-radius: 4px; border: 1px solid; font-weight: 700; }
.status-pass { background: #f0fdf4; border-color: #bbf7d0; color: #166534; }
.status-fail { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
.result-score { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; font-size: .8125rem; color: var(--color-muted); }
.result-score strong { color: var(--color-ink); font: 700 1.15rem var(--font-code); }
.result-explanation { background: var(--color-paper); border: 1px solid var(--color-line); border-radius: 4px; padding: 12px; font-size: .8125rem; line-height: 1.5; color: var(--color-ink); margin: 0; }
.eval-backend-note { margin: 12px 0 0; color: var(--color-muted); font-size: .75rem; }
@media (max-width: 560px) { .eval-panel { padding: 16px; } .eval-result-card { min-height: 180px; } .official-vlm-config { grid-template-columns: minmax(0, 1fr); } .official-example-state { align-items: flex-start; flex-direction: column; } }
.closing { border-top: 1px solid var(--color-line); display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 64px; }
.closing h2 { font-size: clamp(1.6rem, 1.3rem + 1vw, 2rem); }
.closing p { color: var(--color-muted); font-size: clamp(0.95rem, 0.9rem + 0.2vw, 1.05rem); }
.contributors-list { list-style: none; margin: 0; padding: 0; }
.contributor { display: grid; gap: 2px; padding: 12px 0; border-top: 1px solid var(--color-line); }
.contributor strong { font-weight: 650; }
.contributor-role { color: var(--color-muted); font-size: var(--text-sm); }
.contributor-email { color: var(--color-accent); font-size: var(--text-sm); overflow-wrap: anywhere; }
pre { background: var(--color-soft); padding: 24px; font: .875rem/1.65 var(--font-code); overflow-x: auto; white-space: pre-wrap; overflow-wrap: anywhere; border: 1px solid var(--color-line); }
.copy-button { background: var(--color-paper); color: var(--color-ink); border: 1px solid var(--color-line); border-radius: var(--radius-sm); min-height: 44px; padding: 8px 16px; font-size: var(--text-sm); }
.copy-button:hover { border-color: var(--color-ink); }
footer { border-top: 1px solid var(--color-line); max-width: 1120px; margin: 0 auto; padding: 28px 0; display: flex; align-items: center; justify-content: space-between; gap: 24px; font-size: var(--text-sm); }
footer>span { color: var(--color-muted); }
footer a { display: inline-flex; align-items: center; min-height: 44px; white-space: nowrap; }
.noscript-note { padding: 24px; }
.guide { max-width: 880px; }
.guide h1 { font-size: var(--text-heading); }
.guide h2 { margin-top: 48px; font-size: 1.75rem; }
.guide h3 { margin-top: 28px; }
.guide table { border-collapse: collapse; width: 100%; }
.guide td, .guide th { padding: 12px; border-bottom: 1px solid var(--color-line); text-align: left; vertical-align: top; }
.guide code { font-family: var(--font-code); overflow-wrap: anywhere; }
.guide .note { border: 1px solid var(--color-line); border-radius: var(--radius-sm); padding: 16px 24px; background: var(--color-soft); }
/* Compact case layout. Full source content remains available in each card. */
/* Hallmark · pre-emit critique: P4 H4 E4 S5 R4 V4; desktop and responsive browser checks completed. */
.cases-section > .section { max-width: 1320px; }
.case-body { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); border-block: 1px solid var(--color-line); }
.case-body > section { min-width: 0; }
.case .case-level { font-size: .75rem; margin-bottom: 8px; }
.case .input-label { font-size: .75rem; }
.case-output > .input-label { font-weight: 400; color: var(--color-muted); }
.case-input .input-text { margin-bottom: 0; }
.input-text.is-collapsed { display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow: hidden; }
.input-expand { display: block; border: 0; background: var(--color-transparent); color: var(--color-accent); padding: 4px 0; min-height: 36px; font-size: .75rem; text-decoration: underline; text-underline-offset: 3px; }
.input-expand:hover { color: var(--color-ink); }
.case-technical { padding: 0 16px; }
.case-technical > summary { color: var(--color-ink); }
.case-technical .package-info { padding: 4px 0 12px; }
.case-technical .package-info > .input-label { margin: 14px 0 4px; }
.case-technical .package-info > .input-label:first-child { margin-top: 0; }
.case-technical .package-info caption.input-label { padding: 14px 0 4px; }
.case-technical .motion-note { margin-top: 0; }
.case-technical .input-text { margin-bottom: 12px; }
.interleaved-case .case-body { grid-template-columns: minmax(0, 1.8fr) minmax(0, 1fr); }
.interleaved-inputs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.task-timeline { flex-wrap: wrap; }
.task-timeline span { flex-basis: 60px; }
@media (min-width: 901px) and (max-width: 1100px) {
  .case:not(.interleaved-case) .case-body { grid-template-columns: minmax(0, 1fr); }
  .case:not(.interleaved-case) .case-input { border-right: 0; border-bottom: 1px solid var(--color-line); }
}
@media (max-width: 900px) {
  .case-grid { grid-template-columns: minmax(0, 1fr); }
  .case-navigation { gap: 0 20px; }
  .case-navigation a { font-size: .875rem; }
  .interleaved-case .case-body { grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); }
  .interleaved-inputs { grid-template-columns: minmax(0, 1fr); }
  .hf-cards-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .abstract-split, .overview-split, .framework-split { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .eval-grid { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .eval-tabs { flex-direction: column; }
}
@media (max-width: 560px) {
  .case-body, .interleaved-case .case-body { grid-template-columns: minmax(0, 1fr); }
  .case-input { border-right: 0; border-bottom: 1px solid var(--color-line); }
  .case-level-section { margin-top: 32px; }
  .case-navigation span { display: none; }
  .hf-cards-grid { grid-template-columns: minmax(0, 1fr); }
  .hf-card-primary { grid-column: auto; }
}
@media (max-width: 1100px) { footer { margin: 0 40px; } }
@media (max-width: 760px) {
  .case-grid { grid-template-columns: minmax(0, 1fr); }
  .case-header, .case-input, .case-output, .case-footer { padding-left: 16px; padding-right: 16px; }
  .hero-nav { padding: 16px 20px; }
  .hero-nav>a:last-child { font-size: var(--text-sm); }
  .hero-copy { padding: 100px 20px; }
  .hero-copy h1 { font-size: clamp(3.2rem, 12vw, 5.5rem); }
  .hero-copy p { font-size: clamp(1.125rem, 4.3vw, 1.35rem); }
  .hero-bottom { left: 20px; right: 20px; align-items: flex-end; }
  .hero-bottom p { max-width: 145px; }
  .section { padding: 48px 24px; }
  .section-heading, .closing { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .dataset-header-grid { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .section-heading { margin-bottom: 24px; }
  .desktop-break { display: none; }
  footer { margin: 0 24px; flex-wrap: wrap; gap: 8px 24px; }
  footer>span { flex-basis: 100%; order: 3; }
  .guide table { font-size: var(--text-sm); }
}
@media (max-width: 480px) { .case-grid, .interleaved-inputs { grid-template-columns: minmax(0, 1fr); } .resource-link { padding: 8px 16px; } .section { padding-left: 20px; padding-right: 20px; } .hero-nav .wordmark { font-size: 1.15rem; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* Ordered multimodal conditions: motion time is separate from player time. */
.interleaved-inputs { display: block; list-style: none; margin: 0; padding: 0; }
.interleaved-inputs > .input-item { position: relative; margin: 0; padding: 0 0 18px 42px; }
.interleaved-inputs > .input-item:last-child { padding-bottom: 0; }
.interleaved-inputs > .input-item:not(:last-child)::before { content: ""; position: absolute; left: 13px; top: 28px; bottom: 0; border-left: 2px solid var(--color-line); }
.step-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; min-height: 28px; margin-bottom: 6px; }
.step-number { position: absolute; left: 0; top: 0; display: grid; place-items: center; width: 28px; height: 28px; border: 1px solid var(--color-accent); border-radius: 50%; font-size: .75rem; font-weight: 600; color: var(--color-accent); background: var(--color-paper); }
.case .step-heading .input-label { margin: 0; font-size: .875rem; }
.step-motion-time { font-size: .75rem; color: var(--color-accent); white-space: nowrap; font-weight: 600; }
.case .sequence-note { margin: 0 0 18px; color: var(--color-muted); font-size: .75rem; }
.case .sequence-output-note { margin: 0 0 14px; color: var(--color-accent); font-weight: 600; }
.interleaved-inputs .input-item img { width: 100%; max-width: 410px; max-height: none; object-fit: contain; object-position: left; background: transparent; }
.case-player { width: 100%; min-width: 0; background: var(--color-paper); border: 1px solid var(--color-line); border-radius: var(--radius-sm); overflow: clip; }
.case-player video { width: 100%; height: auto; max-height: 360px; object-fit: contain; background: var(--color-motion-backdrop); }
.case-input .case-player-video { max-width: 410px; }
.input-item .case-player video { max-height: none; background: var(--color-dark); }
.case-player audio { display: none; }
.player-controls { display: flex; align-items: center; flex-wrap: wrap; gap: 4px 8px; padding: 4px 6px; }
.player-play, .player-fullscreen { min-height: 36px; padding: 4px 8px; border: 0; border-radius: 3px; color: var(--color-accent); background: var(--color-paper); font-size: .75rem; white-space: nowrap; }
.player-play:hover, .player-fullscreen:hover { background: var(--color-soft); }
.player-play:disabled { opacity: .6; cursor: wait; }
.player-fullscreen { margin-left: auto; font-size: 1rem; min-width: 36px; }
.player-clock { font-size: .6875rem; color: var(--color-muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.player-seek { display: block; width: calc(100% - 16px); min-width: 0; margin: 0 8px 5px; height: 22px; accent-color: var(--color-accent); cursor: pointer; }
.player-seek:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; }
.player-seek:disabled { opacity: .5; cursor: default; }
.case-player:fullscreen { display: flex; flex-direction: column; justify-content: center; background: var(--color-dark); }
.case-player:fullscreen video { flex: 1; min-height: 0; max-height: none; object-fit: contain; }
.case-player:fullscreen .player-controls { background: var(--color-paper); }
.case-reading { margin-bottom: 12px; }
.case-reading p:last-child { margin: 0; }
.case .input-context { margin: 6px 0 0; color: var(--color-muted); font-size: .75rem; }
.case .preview-scope { font-size: .75rem; }
.is-current-step .step-number { background: var(--color-accent); color: var(--color-white); }
.interleaved-case .case-body { grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); }
.interleaved-case .case-output { position: sticky; top: 24px; align-self: start; }
@media (max-width: 760px) {
  .interleaved-case .case-body { grid-template-columns: minmax(0, 1fr); }
  .interleaved-case .case-input { border-right: 0; border-bottom: 1px solid var(--color-line); }
  .interleaved-case .case-output { position: static; }
}