/* RoMo — custom layer on top of Tailwind CDN.
   Light only, soft premium palette. */

html { scroll-behavior: smooth; scroll-padding-top: 5rem; }
body { -webkit-font-smoothing: antialiased; }

/* ── Nav ─────────────────────────────────────────────── */
#nav.scrolled {
  background: rgba(255,255,255,.8);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line, #e7e8ee);
}
.nav-link.active { color: #15151a; }
.nav-link.active::after {
  content: ""; display: block; height: 2px; margin-top: 3px; border-radius: 2px;
  background: #6d7cff;
}

/* ── Hero ────────────────────────────────────────────── */
.hero-glow {
  position: absolute; inset: -20% 0 auto 0; height: 520px; z-index: 0;
  background:
    radial-gradient(40% 60% at 30% 20%, rgba(125,144,255,.22), transparent 70%),
    radial-gradient(40% 60% at 75% 10%, rgba(255,138,122,.16), transparent 70%);
  filter: blur(8px); pointer-events: none;
}
.romo-word { font-family: 'Anton', 'Inter', sans-serif; font-weight: 400; letter-spacing: .01em; line-height: .95; }
.text-gradient {
  background: linear-gradient(120deg, #6d7cff, #9aa6ff 60%, #ff8a7a);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.author { color: #454ccf; text-decoration: none; }
.author:hover { text-decoration: underline; }
.affil { color: inherit; text-decoration: none; border-bottom: 1px dotted #c6cfff; }
.affil:hover { color: #454ccf; border-bottom-color: #454ccf; }

/* ── Buttons ─────────────────────────────────────────── */
.btn-pill {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .6rem 1.1rem; border-radius: 9999px; font-weight: 600; font-size: .95rem;
  transition: all .2s ease;
}
.btn-dark  { background: #15151a; color: #fff; box-shadow: 0 8px 24px rgba(16,18,40,.12); }
.btn-dark:hover  { background: #5560f0; transform: translateY(-1px); }
.btn-ghost { background: #fff; color: #15151a; border: 1px solid #e7e8ee; box-shadow: 0 1px 2px rgba(16,18,40,.04); }
.btn-ghost:hover { border-color: #a3b1ff; transform: translateY(-1px); }

/* ── Dropdown (HuggingFace datasets) ─────────────────── */
.dropdown { position: relative; }
.dropdown-menu {
  position: absolute; top: calc(100% + .5rem); left: 50%; transform: translateX(-50%) translateY(-6px);
  min-width: 16rem; background: #fff; border: 1px solid #e7e8ee; border-radius: 1rem;
  box-shadow: 0 12px 40px rgba(16,18,40,.14); padding: .4rem; z-index: 60;
  opacity: 0; visibility: hidden; transition: opacity .16s, transform .16s; text-align: left;
}
.dropdown.open .dropdown-menu { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.dropdown-nav .dropdown-menu { left: auto; right: 0; transform: translateY(-6px); }
.dropdown-nav.open .dropdown-menu { transform: translateY(0); }
.dropdown-item { display: flex; flex-direction: column; padding: .55rem .7rem; border-radius: .7rem; transition: background .12s; }
.dropdown-item:hover { background: #f5f6f9; }
.di-title { font-weight: 700; font-size: .92rem; color: #15151a; }
.di-sub { font-size: .78rem; color: #6b6b76; }

/* ── Pager ───────────────────────────────────────────── */
.page-btn {
  min-width: 2.2rem; height: 2.2rem; padding: 0 .6rem; border-radius: .7rem;
  border: 1px solid #e7e8ee; background: #fff; color: #3a3a44; font-weight: 600; font-size: .9rem; cursor: pointer; transition: all .14s;
}
.page-btn:hover:not(:disabled):not(.page-active) { border-color: #a3b1ff; }
.page-btn:disabled { opacity: .4; cursor: default; }
.page-active { background: #15151a; color: #fff; border-color: #15151a; }
.page-dots { color: #9aa0ad; padding: 0 .3rem; }

/* ── Section headings ────────────────────────────────── */
.section-title { font-size: 2rem; font-weight: 800; letter-spacing: -.02em; margin-bottom: .5rem; }
.section-sub   { color: #6b6b76; font-size: 1.05rem; max-width: 46rem; }

/* ── Stat cards ──────────────────────────────────────── */
.stat-card {
  background: #fff; border: 1px solid #e7e8ee; border-radius: 1.1rem; padding: 1.4rem 1rem;
  text-align: center; box-shadow: 0 1px 2px rgba(16,18,40,.04), 0 8px 24px rgba(16,18,40,.05);
}
.stat-num   { font-size: 2.1rem; font-weight: 900; letter-spacing: -.02em; color: #454ccf; }
.stat-label { margin-top: .25rem; font-size: .82rem; color: #6b6b76; font-weight: 500; }

/* ── Gallery ─────────────────────────────────────────── */
.chip {
  font-size: .82rem; font-weight: 600; padding: .35rem .8rem; border-radius: 9999px;
  border: 1px solid #e7e8ee; background: #fff; color: #3a3a44; cursor: pointer; transition: all .15s;
}
.chip:hover { border-color: #a3b1ff; }
.chip.active { background: #15151a; color: #fff; border-color: #15151a; }
.chip { flex: 0 0 auto; white-space: nowrap; }

/* Single-row, horizontally-scrollable category filters with expand toggle (#2) */
.chips-scroll { display: flex; gap: .5rem; flex-wrap: nowrap; overflow-x: auto; flex: 1 1 auto;
  scrollbar-width: none; -ms-overflow-style: none; padding-bottom: 2px; scroll-behavior: smooth; }
.chips-scroll::-webkit-scrollbar { display: none; }
.chips-scroll.expanded { flex-wrap: wrap; overflow: visible; }
.chip-more { display: inline-flex; align-items: center; gap: .3rem; }
.chip-more svg { width: .9em; height: .9em; transition: transform .2s; }
.chip-more.open svg { transform: rotate(180deg); }

.motion-card {
  display: flex; flex-direction: column; height: 100%;
  background: #fff; border: 1px solid #e7e8ee; border-radius: 1.1rem; overflow: hidden;
  box-shadow: 0 1px 2px rgba(16,18,40,.04), 0 8px 24px rgba(16,18,40,.05);
  transition: transform .2s, box-shadow .2s;
}
.motion-card:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(16,18,40,.10); }
.motion-stage { position: relative; width: 100%; height: 280px; flex: 0 0 auto; background: linear-gradient(180deg,#fbfcfe,#eef0f6); }
.motion-stage canvas { display: block; width: 100% !important; height: 100% !important; cursor: grab; touch-action: pan-y; }
.motion-stage canvas:active { cursor: grabbing; }
.motion-meta { display: flex; flex-direction: column; flex: 1 1 auto; padding: .9rem 1rem 1.1rem; }
.motion-tags {
  display: grid; grid-template-rows: repeat(3, 1.22rem); align-content: start;
  gap: .26rem; height: 4.16rem; margin-bottom: .65rem; overflow: hidden;
}
.motion-tax-row {
  display: grid; grid-template-columns: 5.9rem minmax(0, 1fr); align-items: center; gap: .5rem;
}
.motion-tax-label {
  color: #8b8f9c; font-size: .62rem; font-weight: 800; letter-spacing: .04em;
  line-height: 1; text-align: left; text-transform: uppercase; white-space: nowrap;
}
.motion-tag  { font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em;
  justify-self: end; min-width: 0; max-width: 100%; width: fit-content; padding: .15rem .5rem; border-radius: 6px;
  background: #eef1ff; color: #454ccf; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.motion-tag.sub { background: #fff1ee; color: #c4564a; }
.motion-tag.act { background: #eafaf1; color: #1f8a5b; }
.motion-cap  { font-size: .9rem; color: #3a3a44; line-height: 1.45; min-height: 3.9em;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.cap-dots { display: flex; gap: .35rem; margin-top: auto; padding-top: .75rem; justify-content: center; }
.cap-dot { width: 6px; height: 6px; padding: 0; border: none; border-radius: 50%;
  background: #d4d7e0; cursor: pointer; transition: background .2s, transform .2s; }
.cap-dot:hover { transform: scale(1.3); }
.cap-dot.active { background: #5560f0; }

/* ── Taxonomy ────────────────────────────────────────── */
.seg-btn {
  font-size: .85rem; font-weight: 600; padding: .45rem 1rem; border-radius: 9999px;
  border: 1px solid #e7e8ee; background: #fff; color: #6b6b76; cursor: pointer; transition: all .15s;
}
.seg-btn.seg-active { background: #15151a; color: #fff; border-color: #15151a; }
#markmap { font-family: 'Inter', sans-serif; }

/* ── Filtering pipeline (funnel + scrollytelling) ────── */
.funnel-readout { text-align: center; margin-bottom: 1.6rem; }
.fr-title { font-size: 2.4rem; font-weight: 900; letter-spacing: -.02em; color: #15151a; line-height: 1.05; }
.fr-label { margin-top: .5rem; font-size: .95rem; color: #6b6b76; font-weight: 500; }
.fr-hours { color: #454ccf; font-weight: 800; font-variant-numeric: tabular-nums; }
.fr-drop { margin-top: .6rem; display: inline-block; min-height: 1.6rem; font-size: .8rem; font-weight: 800;
  color: #c4564a; background: #fff1ee; border-radius: 9999px; padding: .15rem .7rem; }

.funnel-bars { display: flex; flex-direction: column; align-items: center; gap: .45rem; padding: 0 .5rem; }
.funnel-bar {
  height: 42px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: .78rem; white-space: nowrap; overflow: hidden;
  opacity: .38; transform: scale(.99); transition: opacity .3s, transform .3s, box-shadow .3s;
}
.funnel-bar.active { opacity: 1; transform: scale(1.05); box-shadow: 0 10px 26px rgba(85,96,240,.28); }

.pipe-steps { position: relative; }
.pstep {
  background: #fff; border: 1px solid #e7e8ee; border-radius: 1.2rem; padding: 1.5rem 1.6rem;
  box-shadow: 0 1px 2px rgba(16,18,40,.04); margin-bottom: 1.1rem;
  opacity: .5; transform: translateY(6px); transition: opacity .3s, transform .3s, box-shadow .3s, border-color .3s;
}
.pstep.pstep-active { opacity: 1; transform: none; border-color: #c6cfff; box-shadow: 0 10px 30px rgba(16,18,40,.10); }
.pstep-k { font-size: .8rem; font-weight: 800; color: #a3b1ff; letter-spacing: .1em; }
.pstep h3 { font-size: 1.2rem; font-weight: 800; margin: .15rem 0 .5rem; }
.pstep p { color: #6b6b76; font-size: .95rem; line-height: 1.55; }
.pstep-num { margin-top: .9rem; font-size: 1.25rem; font-weight: 800; color: #15151a; font-variant-numeric: tabular-nums; }
.pstep-sub { font-size: .8rem; font-weight: 600; color: #9aa0ad; margin-left: .35rem; }
.pstep-drop { font-size: .78rem; font-weight: 800; color: #c4564a; background: #fff1ee; border-radius: 9999px; padding: .12rem .55rem; margin-left: .4rem; vertical-align: middle; }
.pstep-final { display: flex; gap: .7rem; align-items: center; padding: 1.3rem 1.5rem; border-radius: 1.2rem;
  background: linear-gradient(120deg, #eef1ff, #fff1ee); border: 1px solid #e0e5ff; font-size: .98rem; color: #3a3a44; }
.pstep-final i { color: #5560f0; font-size: 1.4rem; }
@media (min-width: 1024px) {
  .pipe-steps { padding-top: 4vh; }
  .pstep { margin-bottom: 28vh; } .pstep:last-of-type { margin-bottom: 6vh; }
  /* Center the readout + bars vertically in the sticky viewport (#funnel). */
  .pipe-figure { min-height: calc(100vh - 6rem); display: flex; flex-direction: column; justify-content: center; }
}

/* ── Charts ──────────────────────────────────────────── */
.chart-card { background: #fff; border: 1px solid #e7e8ee; border-radius: 1.4rem; padding: 1.4rem; box-shadow: 0 1px 2px rgba(16,18,40,.04), 0 8px 24px rgba(16,18,40,.05); }
.chart-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: .25rem; }
.chart-title { font-weight: 700; font-size: 1.05rem; margin-bottom: .25rem; }
.chart-toggle { display: inline-flex; gap: .2rem; padding: .2rem; border: 1px solid #e7e8ee; border-radius: 9999px; background: #f5f6f9; flex: 0 0 auto; }
.chart-toggle-btn { min-width: 5.5rem; height: 2rem; padding: 0 .75rem; border: 0; border-radius: 9999px; background: transparent; color: #6b6b76; font-size: .78rem; font-weight: 700; cursor: pointer; transition: background .15s, color .15s, box-shadow .15s; }
.chart-toggle-btn.active { background: #15151a; color: #fff; box-shadow: 0 1px 2px rgba(16,18,40,.08); }
.chart { width: 100%; height: 380px; }
#chart-tsne { height: 560px; }
.chart-note { margin-top: .5rem; font-size: .75rem; color: #9aa0ad; }
@media (max-width: 640px) {
  .chart-head { align-items: flex-start; flex-direction: column; gap: .6rem; }
}

/* ── Feature cards ───────────────────────────────────── */
.feature-card { background: #fff; border: 1px solid #e7e8ee; border-radius: 1.4rem; padding: 1.6rem; box-shadow: 0 1px 2px rgba(16,18,40,.04), 0 8px 24px rgba(16,18,40,.05); transition: transform .2s; }
.feature-card:hover { transform: translateY(-3px); }
.feature-card h3 { font-weight: 700; margin: .6rem 0 .4rem; }
.feature-card p { color: #6b6b76; font-size: .95rem; line-height: 1.5; }
.feature-icon { color: #5560f0; }
.feature-icon svg { width: 1.7rem; height: 1.7rem; stroke-width: 2; }

/* ── Scroll reveal ───────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

#to-top.show { opacity: 1; pointer-events: auto; }