@charset "UTF-8";

:root {
    --page-bg: #f7f7f5;
    --panel-bg: #ffffff;
    --panel-alt: #fafaf8;
    --text-main: #1d2329;
    --text-muted: #5e6974;
    --brand: #be0000;
    --brand-deep: #8b0000;
    --border: #d5d9dd;
    --chip-bg: #ffffff;
    --chip-text: #8b0000;
    --chip-hover: #be0000;
    --chip-hover-text: #ffffff;
    --topic-chip-bg: #4f6f7a;
    --topic-chip-text: #ffffff;
    --topic-chip-hover: color-mix(in srgb, var(--topic-chip-bg) 88%, black);
    --topic-chip-hover-text: #ffffff;
    --focus: #0f766e;
    --shadow: 0 8px 20px rgba(29, 35, 41, 0.06);
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 999px;
    --content-width: 72rem;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    min-height: 100%;
}

body {
    margin: 0;
    color: var(--text-main);
    background: var(--page-bg);
}

body.no-topnav {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

#uu-top-target {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.page-shell {
    width: min(calc(100% - 2rem), var(--content-width));
    margin: 0 auto;
    padding: 1.5rem 0 4rem;
    flex: 1;
    display: grid;
    align-items: start;
    gap: 1.5rem;
}

.hero-panel,
.panel {
    background: var(--panel-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

.hero-panel {
    padding: 1.75rem 1.75rem 1.5rem;
    border-left: 4px solid var(--brand);
}

.hero-panel h1,
.section-heading h2,
.chip-section h3,
.stat-value,
.list-card-title,
.question-card-title {
    margin: 0;
    color: var(--text-main);
}

.hero-panel h1 {
    font-size: clamp(1.85rem, 4vw, 2.7rem);
    line-height: 1.08;
}

.hero-panel .lead {
    max-width: 56rem;
    margin-top: 0.9rem;
    color: var(--text-muted);
    font-size: 1.05rem;
}

.eyebrow {
    margin: 0 0 0.45rem;
    font-size: 0.82rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--brand);
    font-weight: 700;
}

.panel {
    padding: 1.5rem;
}

.stack-lg {
    display: grid;
    gap: 1.2rem;
}

.section-heading h2,
.chip-section h3 {
    font-size: 1.5rem;
}

.section-heading p,
.chip-section p,
.muted,
.search-hint,
.question-card-meta,
.metadata-list,
.question-context,
.transcript-block,
.list-card-meta {
    color: var(--text-muted);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
    gap: 1rem;
}

.stat-card {
    padding: 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: linear-gradient(180deg, #fff 0%, var(--panel-alt) 100%);
}

.stat-value {
    display: block;
    font-size: 1.9rem;
    color: var(--brand-deep);
}

.stat-label {
    display: block;
    margin-top: 0.35rem;
    font-weight: 600;
}

.chip-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
}

.chip-cloud[data-variant='topic'] {
    --chip-bg: var(--topic-chip-bg);
    --chip-text: var(--topic-chip-text);
    --chip-hover: var(--topic-chip-hover);
    --chip-hover-text: var(--topic-chip-hover-text);
}

.chip {
    display: inline-flex;
    align-items: center;
    min-height: 2.4rem;
    padding: 0.45rem 0.95rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--chip-bg);
    color: var(--chip-text);
    text-decoration: none;
    font-weight: 700;
    transition: background-color 140ms ease, color 140ms ease, transform 140ms ease, border-color 140ms ease;
}

.chip:hover,
.chip:focus-visible {
    background: var(--chip-hover);
    color: var(--chip-hover-text);
    border-color: var(--chip-hover);
    transform: translateY(-1px);
}

.chip-muted {
    background: #f3f5f7;
    color: var(--text-muted);
}

.search-shell {
    display: grid;
    gap: 0.75rem;
}

.field-label {
    font-weight: 700;
}

.search-input {
    width: 100%;
    padding: 0.9rem 1rem;
    border: 2px solid #c7ccd1;
    border-radius: 0.75rem;
    font: inherit;
    background: #fff;
}

.search-results,
.question-card-list,
.list-stack,
.metadata-list {
    margin: 0;
    padding: 0;
}

.search-results,
.question-card-list,
.list-stack {
    list-style: none;
}

.search-results {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
}

.search-result-chip {
    display: inline-flex;
    flex-direction: column;
    gap: 0.1rem;
    min-width: min(18rem, 100%);
    max-width: 100%;
    padding: 0.9rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: #fff;
    text-decoration: none;
    color: inherit;
}

.search-result-chip:hover,
.search-result-chip:focus-visible {
    border-color: var(--brand);
    box-shadow: var(--shadow);
}

.list-card-link,
.question-card-link {
    display: grid;
    gap: 0.25rem;
    text-decoration: none;
    color: inherit;
    padding: 1rem 1.05rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: #fff;
}

.list-card-link:hover,
.list-card-link:focus-visible,
.question-card-link:hover,
.question-card-link:focus-visible {
    border-color: var(--brand);
    box-shadow: var(--shadow);
}

.search-result-title,
.list-card-title,
.question-card-title {
    font-weight: 700;
}

.search-result-meta,
.question-card-topline,
.list-card-meta {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.question-card-list {
    display: grid;
    gap: 0.85rem;
}

.question-card-list-compact {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr));
    gap: 0.8rem;
    align-items: start;
}

.question-card-list-compact .question-card {
    min-width: 0;
}

.question-card-list-ordered {
    list-style: decimal;
    padding-left: 1.4rem;
}

.question-card-list-ordered .question-card {
    padding-left: 0.35rem;
}

.question-card-text {
    color: var(--text-main);
}

.question-article {
    display: grid;
    gap: 1rem;
    align-content: start;
}

.question-statement,
.transcript-block {
    padding: 1.15rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: #fff;
}

.question-statement {
    font-size: 1.05rem;
}

.question-statement-copyable {
    display: grid;
    gap: 0.9rem;
}

.question-statement-toolbar {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.question-statement-body {
    display: block;
}

.question-statement p,
.question-statement li {
    margin-top: 0;
    margin-bottom: 1rem;
}

.question-statement p:last-child,
.question-statement li:last-child {
    margin-bottom: 0;
}

.question-list {
    padding-left: 1.35rem;
    margin: 0;
}

.display-math {
    overflow-x: auto;
    padding: 0.75rem 0;
}

.chip-section {
    display: grid;
    gap: 0.75rem;
}

.question-panel {
    gap: 0.8rem;
    align-self: start;
}

.question-heading {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.9rem 1.25rem;
}

.question-heading-chips {
    display: flex;
    flex: 1 1 20rem;
    min-width: 0;
    justify-content: flex-end;
}

.question-heading-chips .chip-cloud {
    justify-content: flex-end;
}

.question-topics {
    margin-top: 1rem;
}

.question-topics .chip-cloud {
    justify-content: flex-start;
}

.statement-preview-button,
.statement-copy-button,
.statement-modal-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.35rem;
    height: 2.35rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: #fff;
    color: var(--brand-deep);
    cursor: pointer;
    box-shadow: 0 6px 16px rgba(72, 44, 31, 0.08);
}

.statement-preview-button:hover,
.statement-preview-button:focus-visible,
.statement-copy-button:hover,
.statement-copy-button:focus-visible,
.statement-copy-button.is-copied,
.statement-modal-close:hover,
.statement-modal-close:focus-visible {
    border-color: var(--brand);
    color: var(--brand);
}

.statement-copy-icon {
    width: 1.05rem;
    height: 1.05rem;
}

.statement-modal {
    width: min(68rem, calc(100vw - 2rem));
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 0;
    background: #fff;
    box-shadow: var(--shadow);
}

.statement-modal::backdrop {
    background: rgba(0, 0, 0, 0.55);
}

.statement-modal__header,
.statement-modal__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.15rem;
}

.statement-modal__header {
    border-bottom: 1px solid var(--border);
}

.statement-modal__header h3 {
    margin: 0;
    font-size: 1.25rem;
}

.statement-modal__body {
    margin: 0;
    padding: 1.15rem 1.35rem;
    border: 0;
    border-radius: 0;
    max-height: min(68vh, 42rem);
    overflow: auto;
}

.statement-modal__raw {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    font: inherit;
}

.statement-modal__footer {
    border-top: 1px solid var(--border);
    justify-content: flex-end;
}

.statement-copy-toast {
    position: absolute;
    top: 3.05rem;
    right: 0.75rem;
    padding: 0.3rem 0.6rem;
    border-radius: 999px;
    background: rgba(29, 35, 41, 0.92);
    color: #fff;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.01em;
    opacity: 0;
    transform: translateY(-0.25rem);
    transition: opacity 120ms ease, transform 120ms ease;
    pointer-events: none;
}

.statement-copy-toast.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.note-block {
    padding: 0.9rem 1rem;
    background: #fff5d6;
    border-left: 4px solid #be8a00;
    border-radius: 0.7rem;
}

.button-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.14);
}

:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 2px;
}

@media (max-width: 800px) {
    .page-shell {
        padding-top: 1.25rem;
    }

    .hero-panel,
    .panel {
        padding: 1.25rem;
    }
}


.site-footer {
    margin-top: auto;
    background: #e6e6e4;
    border-top: 1px solid var(--border);
}

.site-footer__inner {
    width: min(calc(100% - 2rem), var(--content-width));
    margin: 0 auto;
    padding: 1rem 0 1.15rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem 1.25rem;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.site-footer__copyright {
    margin: 0;
    font-weight: 600;
}

.site-footer__links {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.65rem 1rem;
}

.site-footer__links a {
    color: inherit;
    text-decoration: none;
}

.site-footer__links a:hover,
.site-footer__links a:focus-visible {
    color: var(--brand);
    text-decoration: underline;
}


.mathjax-sandbox {
    display: grid;
    gap: 1rem;
}

.mathjax-sandbox-input {
    width: 100%;
    min-height: 14rem;
    resize: vertical;
    padding: 0.9rem 1rem;
    border: 2px solid #c7ccd1;
    border-radius: 0.75rem;
    font: inherit;
    line-height: 1.5;
    background: #fff;
    color: var(--text-main);
}

.mathjax-sandbox-preview {
    min-height: 10rem;
}