/* HEURISTIK Lab — CUE engine showcase
 * Modern editorial visual language. Reference points: FT Visual Journalism,
 * Bloomberg charts, The Pudding. Hairline borders, generous breathing room,
 * disciplined typography, restrained color. Emotion palette appears only on
 * emotion data; everything else is neutral.
 *
 * One cascade, one source per selector: base styles read top to bottom and
 * every breakpoint lives in the single responsive section at the end.
 */

:root {
    /* Surfaces */
    --bg-primary: #FFFFFF;
    --bg-secondary: #FAFAFA;
    --bg-card: #FFFFFF;

    /* Text */
    --text-primary: #0A0A0A;
    --text-secondary: #525252;
    --text-tertiary: #A3A3A3;

    /* Borders — hairlines, not heavy */
    --border-hairline: #E5E5E5;
    --border-strong: #0A0A0A;

    /* Emotion palette — used only on emotion data */
    --color-happy: #E6A93C;
    --color-sad: #4C8FCD;
    --color-angry: #DC5B43;
    --color-fear: #9B72C0;
    --color-surprise: #2BB3A3;
    --color-disgust: #69A94E;
    --color-neutral: #9AA3AD;

    /* Valence — the happy<->sad axis (gold / blue) */
    --valence-positive: #E6A93C;
    --valence-negative: #4C8FCD;

    /* Platform bands — muted, quiet tones */
    --platform-youtube: #4E6076;
    --platform-reddit: #C77B4A;
    --platform-x: #6FA0C0;

    /* Spacing rhythm */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;

    /* Shape */
    --radius-card: 6px;

    /* Type */
    --font-sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI",
                 Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo,
                 Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: "tnum", "lnum";
    margin: 0;
}


/* Navbar ─────────────────────────────────────────────────────────── */

.navbar {
    background: var(--bg-primary) !important;
    border-bottom: 1px solid var(--border-hairline) !important;
    border-radius: 0 !important;
    padding: 0 var(--space-6) !important;
    min-height: 60px !important;
    height: 60px !important;
    display: flex !important;
    align-items: center !important;
}

.navbar > .container-fluid {
    display: flex !important;
    align-items: center !important;
    padding: 0 !important;
    height: 100% !important;
}

/* bslib emits BS3-compat navbar markup (verified): the brand nests in
   .navbar-header (with a .navbar-toggle button) and the tabs in
   .navbar-collapse -- two independent wrappers. Center both explicitly,
   and run an explicit full-height chain (container-fluid -> collapse ->
   ul -> li -> link) so the tab labels center on the same midline as the
   brand instead of an intrinsically-sized wrapper's. The forced
   display:flex keeps the menu always-expanded; the mobile breakpoint
   reflows it to a second row instead of collapsing it. */
.navbar .navbar-header {
    display: flex !important;
    align-items: center !important;
}

.navbar .navbar-collapse {
    display: flex !important;
    align-items: center !important;
    height: 100%;
}

.navbar-brand {
    font-weight: 600 !important;
    font-size: 15px !important;
    letter-spacing: 0;
    color: var(--text-primary) !important;
    padding: 0 !important;
    margin-right: var(--space-8) !important;
    display: flex !important;
    align-items: center !important;
}

/* Flex row so the glyph and the text center on each other -- as a plain
   inline span the 28px logo sits on the text BASELINE, riding the glyph
   high of the navbar midline the nav links are centered on. */
.brand-lockup {
    display: inline-flex;
    align-items: center;
    line-height: 1;
}

/* Whole-wordmark lockup (mark = the H, gold circle = the accent). Replaces
   the former icon + text construction. */
.brand-wordmark {
    display: block;  /* immune to the reboot's img { vertical-align } */
    height: 22px;
    width: auto;
}

/* Engine tag in the brand lockup: muted, hairline-separated. */
.brand-sub {
    margin-left: var(--space-3);
    padding-left: var(--space-3);
    border-left: 1px solid var(--border-hairline);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--text-tertiary);
    line-height: 1.2;
}

.navbar-nav {
    display: flex !important;
    align-items: center !important;
    gap: var(--space-1);
    height: 100%;
}

.navbar-nav > li.nav-item {
    height: 100%;
}

/* The about button's list item centers its content instead of running the
   full-height link treatment. */
.navbar-nav > li.bslib-nav-item {
    display: flex;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary) !important;
    font-weight: 500 !important;
    font-size: 13px !important;
    letter-spacing: 0 !important;
    text-transform: none !important;
    /* 2px top padding re-centers the label: the 2px underline border eats
       the content box from below, which would float the text half the
       border height above the brand midline. */
    padding: 2px var(--space-3) 0 !important;
    height: 100% !important;
    line-height: 1 !important;
    border-bottom: 2px solid transparent;
    transition: color 120ms ease;
    display: flex !important;
    align-items: center !important;
}

.nav-link:hover { color: var(--text-primary) !important; }

.nav-link.active {
    color: var(--text-primary) !important;
    background: transparent !important;
    border-bottom-color: var(--border-strong);
    font-weight: 600 !important;
}


/* Page container ─────────────────────────────────────────────────── */

.container-fluid {
    padding: var(--space-5) var(--space-5);
    max-width: 1480px;
}

.section-stack { display: flex; flex-direction: column; gap: var(--space-4); }


/* Typography utilities ───────────────────────────────────────────── */

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 10px;
    font-weight: 600;
    color: var(--text-tertiary);
}

.section-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}

/* Section label + optional "?" affordance in one row. The row carries the
   label's bottom margin, so card rhythm is unchanged. */
.card-title-row {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}

.card-title-row .section-label { margin-bottom: 0; }

/* In flex stacks the gap already spaces the title; drop the margin. */
.compare-side-stack > .card-title-row { margin-bottom: 0; }

.kicker {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.55;
    max-width: 64ch;
}

.footnote {
    font-size: 11px;
    color: var(--text-tertiary);
    letter-spacing: 0;
}


/* Hero numbers ───────────────────────────────────────────────────── */

.hero-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: var(--space-6);
    padding-bottom: var(--space-6);
    border-bottom: 1px solid var(--border-hairline);
}

.hero-tile { display: flex; flex-direction: column; gap: var(--space-2); }

.hero-value {
    /* Fluid: 48px on desktop, easing down to 30px on narrow phones. */
    font-size: clamp(30px, 6vw, 48px);
    font-weight: 600;
    line-height: 1.0;
    letter-spacing: 0;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums lining-nums;
}

.hero-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: none;
    letter-spacing: 0;
}

.hero-context {
    font-size: 12px;
    color: var(--text-tertiary);
    font-variant-numeric: tabular-nums;
}


/* Cards (hairline panels) ────────────────────────────────────────── */

.editorial-card,
.atlas-main-panel,
.atlas-side-panel,
.atlas-featured-panel,
.compare-canvas,
.compare-secondary,
.finding-card {
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-card);
    padding: var(--space-3);
    min-width: 0;
    overflow: hidden;
}

.editorial-card { background: var(--bg-card); }

.atlas-main-panel,
.atlas-side-panel,
.atlas-featured-panel { background: var(--bg-primary); }

.panel-heading-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--space-4);
    flex-wrap: wrap;
}

/* Inline form controls in a panel heading (e.g. the Atlas topic filter)
   should not carry Bootstrap's default vertical margin. */
.panel-heading-row .shiny-input-container,
.panel-heading-row .form-group { margin: 0 !important; }


/* Atlas ──────────────────────────────────────────────────────────── */

.atlas-grid { display: grid; align-items: stretch; }

.atlas-grid-main {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: var(--space-3);
}


.atlas-side-panel {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.atlas-snapshot {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.atlas-snapshot-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: var(--space-4);
    padding-top: var(--space-3);
    border-top: 1px solid var(--border-hairline);
}

.atlas-snapshot-row:first-child {
    border-top: none;
    padding-top: 0;
}

.atlas-snapshot-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}

.atlas-snapshot-sub {
    font-size: 11px;
    color: var(--text-tertiary);
}

.atlas-snapshot-value {
    font-size: 18px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.atlas-signal-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: var(--space-3);
    align-items: stretch;
}

.atlas-featured-rail {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-3);
}

.atlas-featured-card {
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-card);
    background: var(--bg-primary);
    cursor: pointer;
    min-width: 0;
    overflow: hidden;
    transition: border-color 120ms ease, transform 120ms ease;
}

.atlas-featured-card:hover,
.atlas-featured-card:focus-visible {
    border-color: var(--border-strong);
    outline: none;
    transform: translateY(-1px);
}

.atlas-featured-thumb {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    display: block;
    background: #000;
}

.atlas-featured-body {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding: var(--space-3);
}

.atlas-featured-meta {
    display: flex;
    justify-content: space-between;
    gap: var(--space-2);
    color: var(--text-tertiary);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.atlas-featured-title {
    font-size: 12px;
    font-weight: 600;
    line-height: 1.35;
    color: var(--text-primary);
    min-height: 34px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.atlas-featured-channel,
.atlas-featured-signal {
    font-size: 11px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}


/* Compare ────────────────────────────────────────────────────────── */

.compare-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-6);
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--border-hairline);
}

.compare-controls .form-group,
.compare-controls .shiny-input-container { margin: 0 !important; }

.compare-workbench {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: var(--space-3);
    align-items: stretch;
}

.compare-side-stack {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    min-width: 0;
}

.compare-secondary { margin-top: var(--space-4); }

.findings-band {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-3);
}

.finding-card {
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.finding-sentence {
    font-size: 13px;
    color: var(--text-primary);
    line-height: 1.42;
}

.finding-stat-row {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-1);
    padding-top: var(--space-2);
    border-top: 1px solid var(--border-hairline);
}

.finding-context {
    font-size: 12px;
    color: var(--text-secondary);
}


/* Color chip — single accent inline ─────────────────────────────── */

.color-chip {
    display: inline-block;
    width: 8px;
    height: 8px;
    background: var(--text-tertiary);
    flex-shrink: 0;
}


/* Spotlight ──────────────────────────────────────────────────────── */

.spotlight-pick {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-3);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--border-hairline);
    margin-bottom: var(--space-4);
}

.spotlight-pick-topic,
.spotlight-pick-video {
    display: flex;
    align-items: center;
    min-width: 0;
}

.spotlight-pick-topic { flex: 0 1 200px; }
.spotlight-pick-video { flex: 1 1 320px; }

.spotlight-pick .form-group,
.spotlight-pick .shiny-input-container {
    margin: 0 !important;
    flex: 1 1 auto;
    min-width: 0;
}

.spotlight-pick-meta {
    font-size: 12px;
    color: var(--text-tertiary);
    font-variant-numeric: tabular-nums;
    flex: 0 0 auto;
}

.spotlight-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: var(--space-6);
    align-items: end;
    padding-bottom: var(--space-5);
    border-bottom: 1px solid var(--border-hairline);
}

.spotlight-header-copy {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.spotlight-title {
    font-size: 22px;
    line-height: 1.15;
    font-weight: 650;
    color: var(--text-primary);
    letter-spacing: 0;
}

.spotlight-subtitle {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    color: var(--text-secondary);
    font-size: 12px;
}

.spotlight-header-signal {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

.highlight-strip { min-height: 34px; }

.highlight-strip-inner {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.highlight-pill {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    min-height: 30px;
    border: 1px solid var(--border-hairline);
    padding: 0 var(--space-3);
    cursor: pointer;
    background: var(--bg-primary);
}

.highlight-pill:hover,
.highlight-pill:focus-visible {
    border-color: var(--border-strong);
    outline: none;
}

.highlight-time {
    color: var(--text-tertiary);
    font-size: 11px;
    font-variant-numeric: tabular-nums;
}

.highlight-label {
    color: var(--text-primary);
    font-size: 12px;
    font-weight: 600;
}

.spotlight-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 330px;
    gap: var(--space-3);
    align-items: start;
}

.spotlight-main,
.spotlight-side {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    min-width: 0;
}

.spotlight-dual-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
}

.spotlight-player {
    aspect-ratio: 16 / 9;
    border: 1px solid var(--border-hairline);
    background: #000;
    width: 100%;
}

.spotlight-player iframe {
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
}

.yt-player-wrap,
.yt-player-wrap > div,
.yt-player-wrap iframe {
    width: 100%;
    height: 100%;
    display: block;
}

.topic-lane {
    margin-top: var(--space-2);
    display: flex;
    width: 100%;
    height: 34px;
    border: 1px solid var(--border-hairline);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.topic-lane-seg {
    height: 100%;
    border-right: 1px solid #FFFFFF;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    font-size: 10px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    text-overflow: ellipsis;
    padding: 0 var(--space-2);
}

.topic-lane-seg:last-child { border-right: none; }

.topic-lane-seg span {
    display: block;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
}

.topic-lane-seg.clickable {
    cursor: pointer;
}

.topic-lane-seg.clickable:hover,
.topic-lane-seg.clickable:focus-visible {
    filter: brightness(1.12);
    box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.85);
    outline: none;
}

.topic-structure {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.topic-structure-row {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.topic-structure-line {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--space-3);
}

.topic-structure-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.topic-structure-meta {
    flex-shrink: 0;
    font-size: 11px;
    color: var(--text-tertiary);
    font-variant-numeric: tabular-nums;
}

.topic-structure-bar {
    height: 4px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-hairline);
}

.topic-structure-fill {
    height: 100%;
    background: var(--text-primary);
}

.topic-structure-examples {
    font-size: 11px;
    color: var(--text-secondary);
    line-height: 1.35;
}

.spotlight-emotion-strip {
    display: flex;
    width: 100%;
    height: 14px;
    border: 1px solid var(--border-hairline);
}

.spotlight-emotion-strip-seg { height: 100%; }

/* Spotlight divergence moments */

.divergence-moments {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    margin-top: var(--space-2);
    padding-top: var(--space-2);
    border-top: 1px solid var(--border-hairline);
}

.divergence-caption { margin-bottom: var(--space-1); }

.divergence-moment {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    color: var(--text-secondary);
}

.divergence-moment.clickable { cursor: pointer; }
.divergence-moment.clickable:hover,
.divergence-moment.clickable:focus-visible {
    color: var(--text-primary);
    outline: none;
}

.divergence-time {
    font-variant-numeric: tabular-nums;
    color: var(--text-tertiary);
    flex: 0 0 auto;
    min-width: 34px;
}

.divergence-vs { color: var(--text-tertiary); font-style: italic; }


/* Map ────────────────────────────────────────────────────────────── */

.map-wrapper {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.map-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-3) var(--space-6);
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-card);
    background: var(--bg-primary);
}

.map-controls .shiny-input-container,
.map-controls .form-group { margin: 0 !important; }

.map-control-group { display: inline-flex; align-items: center; }

.map-controls-meta {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.map-coverage {
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
}

.map-body {
    position: relative;
    height: 74vh;
    min-height: 520px;
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-card);
    overflow: hidden;
    background: #FFFFFF;
}

.map-body .shiny-spinner-output-container,
.map-body .plotly,
.map-body .plotly-html-widget {
    height: 100% !important;
    width: 100% !important;
}

.valence-legend {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 10px;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.valence-legend-gradient {
    width: 80px;
    height: 8px;
    border-radius: 2px;
    background: linear-gradient(90deg,
        var(--valence-negative), #F4F0EA, var(--valence-positive));
}


/* Emotion legend ─────────────────────────────────────────────────── */

.emotion-legend {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-1) var(--space-3);
}

.emotion-legend-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    color: var(--text-secondary);
}

.emotion-legend-swatch {
    width: 10px;
    height: 10px;
    border-radius: 2px;
    flex: 0 0 auto;
}

.emotion-legend.tone-legend { margin-top: var(--space-2); }


/* Disagreement / agreement headlines ─────────────────────────────── */

.atlas-disagreement,
.compare-agreement {
    display: flex;
    align-items: baseline;
    gap: var(--space-2);
    margin: var(--space-1) 0 var(--space-3);
}

.atlas-disagreement-value,
.compare-agreement-value {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
    flex: 0 0 auto;
}

.atlas-disagreement-text,
.compare-agreement-text {
    font-size: 12px;
    line-height: 1.4;
    color: var(--text-secondary);
}

/* Quiet in-card action (e.g. Atlas "see the split in a featured video"). */
.card-action-link {
    display: inline-block;
    margin-top: var(--space-2);
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.card-action-link:hover,
.card-action-link:focus-visible {
    color: var(--text-primary);
    text-decoration: underline;
    outline: none;
}


/* Form controls ──────────────────────────────────────────────────── */

.form-select,
.form-control,
.selectize-input {
    background: var(--bg-primary) !important;
    border: 1px solid var(--border-hairline) !important;
    border-radius: 0 !important;
    color: var(--text-primary);
    font-size: 13px;
    padding: 6px 10px !important;
    height: 32px !important;
    min-height: 32px !important;
    line-height: 1.2;
    box-shadow: none !important;
}

.form-select:focus,
.form-control:focus,
.selectize-input.focus {
    border-color: var(--text-primary) !important;
    box-shadow: none !important;
    outline: none !important;
}

.selectize-dropdown {
    border: 1px solid var(--border-hairline);
    border-radius: 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
    font-size: 13px;
}

.shiny-input-container { margin: 0 !important; }

/* Radio + checkbox group (inline, tight) */
.shiny-options-group {
    display: inline-flex;
    align-items: center;
    gap: var(--space-4);
}

.radio-inline,
.checkbox-inline {
    margin: 0 !important;
    padding-left: 22px !important;
    font-size: 13px;
    line-height: 1.4;
    color: var(--text-primary);
}


/* Navbar external-reference links ────────────────────────────────── */

/* Borderless brand glyphs that link OUT (main site, GitHub). The absence
   of a box is what sets them apart from the bordered .btn-about in-app
   action sitting to their right; colour follows the navbar chrome. */
.nav-ext-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    color: var(--text-secondary);
    transition: color 120ms ease;
}

.nav-ext-link svg {
    display: block;
    width: 16px;
    height: 16px;
    fill: currentColor;
}

.nav-ext-link:hover,
.nav-ext-link:focus-visible {
    color: var(--text-primary);
    outline: none;
}

/* Hairline divider: external links | in-app action. */
.nav-sep {
    width: 1px;
    height: 18px;
    margin: 0 var(--space-1);
    background: var(--border-hairline);
}


/* About button + modal ──────────────────────────────────────────── */

.btn-about {
    background: transparent !important;
    border: 1px solid var(--border-hairline) !important;
    border-radius: 0 !important;
    color: var(--text-secondary) !important;
    width: 32px;
    height: 32px;
    padding: 0 !important;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    transition: all 120ms ease;
}

.btn-about:hover {
    border-color: var(--text-primary) !important;
    color: var(--text-primary) !important;
    background: transparent !important;
}

/* Per-card "?" affordance: a quiet hairline circle that opens the card's
   method note. Sized to ride alongside a 13px section label. */
.info-btn {
    width: 18px;
    height: 18px;
    min-height: 0;
    padding: 0 !important;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-hairline) !important;
    border-radius: 50% !important;
    background: transparent !important;
    color: var(--text-tertiary) !important;
    font-size: 10px;
    font-weight: 600;
    line-height: 1;
    flex: 0 0 auto;
    box-shadow: none !important;
    transition: border-color 120ms ease, color 120ms ease;
    touch-action: manipulation;
}

.info-btn:hover,
.info-btn:focus-visible {
    border-color: var(--text-primary) !important;
    color: var(--text-primary) !important;
    background: transparent !important;
    outline: none;
}

.modal-content {
    border-radius: 0 !important;
    border: 1px solid var(--border-hairline);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.modal-header { width: 100%; }
.modal-header .modal-title { flex: 1 1 auto; }

.about-modal-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    font-weight: 600;
    font-size: 14px;
    letter-spacing: 0;
}

.btn-close-custom {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    padding: 0;
    background: transparent;
    border: none;
    font-size: 20px;
    line-height: 1;
    cursor: pointer;
    color: var(--text-secondary);
    border-radius: 4px;
}

.btn-close-custom:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.about-content h4 {
    font-size: 16px;
    margin: 0 0 var(--space-3) 0;
    font-weight: 600;
    letter-spacing: 0;
}

.about-content p {
    font-size: 13px;
    line-height: 1.6;
    color: var(--text-primary);
    margin: 0 0 var(--space-3) 0;
}

.about-content .about-version {
    font-size: 11px;
    color: var(--text-tertiary);
    margin-top: var(--space-5);
}


/* Scrollbars ─────────────────────────────────────────────────────── */

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--border-hairline);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }


/* Plotly tweaks ──────────────────────────────────────────────────── */

.plotly .modebar { display: none !important; }
.js-plotly-plot .plotly .main-svg { background: transparent !important; }

.editorial-card .shiny-spinner-output-container,
.compare-canvas .shiny-spinner-output-container,
.compare-secondary .shiny-spinner-output-container,
.atlas-main-panel .shiny-spinner-output-container,
.plotly,
.plotly-html-widget {
    max-width: 100% !important;
}


/* Empty / loading states ───────────────────────────────────────── */

.empty-state {
    color: var(--text-tertiary);
    font-size: 13px;
    padding: var(--space-5) 0;
    text-align: center;
}


/* Touch behavior ─────────────────────────────────────────────────── */

/* Kill the 300ms double-tap-zoom delay on every tappable element. */
.nav-link,
.btn-about,
.highlight-pill,
.topic-lane-seg.clickable,
.atlas-featured-card,
.divergence-moment.clickable,
.card-action-link {
    touch-action: manipulation;
}


/* Responsive ─────────────────────────────────────────────────────── */

@media (max-width: 1240px) {
    .atlas-featured-rail {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .compare-workbench {
        grid-template-columns: 1fr;
    }

    .compare-side-stack .findings-band {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 1024px) {
    .atlas-grid-main,
    .atlas-signal-grid,
    .spotlight-grid,
    .spotlight-dual-grid,
    .spotlight-header {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    /* Navbar reflows to two rows: brand on top, the (always-expanded)
       tab row below it, horizontally scrollable if it ever outgrows the
       viewport. No hamburger: four tabs are one tap away. The toggler
       bs3compat would show is hidden -- the menu never collapses. */
    .navbar {
        height: auto !important;
        min-height: 0 !important;
        padding: 0 var(--space-4) !important;
    }

    .navbar > .container-fluid {
        flex-wrap: wrap;
        height: auto !important;
    }

    .navbar .navbar-header { height: 44px; }

    .navbar-toggle,
    .navbar-toggler { display: none !important; }

    .navbar-brand { margin-right: 0 !important; }

    .brand-sub { display: none; }

    .navbar .navbar-collapse {
        flex-basis: 100%;
        height: auto;
        overflow-x: auto;
        border-top: 1px solid var(--border-hairline);
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .navbar .navbar-collapse::-webkit-scrollbar { display: none; }

    .navbar-nav {
        height: 44px;
        min-width: max-content;
        flex: 1 0 auto;
    }

    .nav-link { white-space: nowrap; }

    .container-fluid {
        padding: var(--space-5) var(--space-4);
    }

    .hero-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: var(--space-5);
    }

    /* Featured videos become a swipeable, snap-aligned rail; cards bleed
       to the panel edge and snap back to its inner padding. */
    .atlas-featured-rail {
        display: flex;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        scroll-padding-left: var(--space-3);
        margin: 0 calc(-1 * var(--space-3));
        padding: 0 var(--space-3);
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .atlas-featured-rail::-webkit-scrollbar { display: none; }

    .atlas-featured-card {
        flex: 0 0 72%;
        scroll-snap-align: start;
    }

    .compare-side-stack .findings-band {
        grid-template-columns: 1fr;
    }

    .map-controls {
        gap: var(--space-2) var(--space-4);
    }

    .map-controls-meta {
        margin-left: 0;
        width: 100%;
        justify-content: space-between;
    }

    .map-body {
        height: 64vh;
        min-height: 420px;
    }
}