/* ==========================================================================
   456 meaning - mobile interface styles (456meaning.click, bn-BD)
   Prefix contract: every class uses uia3783- , variables use --uia3783-
   Canvas: 320-430px phone frame, centered on wide screens.
   Palette: #F8F9FA paper / #0F0F23 ink / #FF91A4 rose / #FF5722 flame
   Direction: geometric headings, near-square tool corners, image+name-bar
   game cards, soft color micro transitions, edge-aligned functional header,
   slide-up route panel, brand-accent bottom band.
   ========================================================================== */

/* ---------- tokens ---------- */
:root {
  --uia3783-ink: #0F0F23;
  --uia3783-ink-deep: #090917;
  --uia3783-ink-raised: #171732;
  --uia3783-ink-card: #1c1c3a;
  --uia3783-paper: #F8F9FA;
  --uia3783-rose: #FF91A4;
  --uia3783-flame: #FF5722;
  --uia3783-muted: rgba(248, 249, 250, 0.64);
  --uia3783-faint: rgba(248, 249, 250, 0.42);
  --uia3783-line: rgba(248, 249, 250, 0.14);
  --uia3783-line-strong: rgba(248, 249, 250, 0.26);
  --uia3783-edge: 2px;                 /* near-square tool corner */
  --uia3783-edge-soft: 4px;             /* lightly rounded CTA corner */
  --uia3783-font-head: 'Baloo Da 2', 'Hind Siliguri', 'Noto Sans Bengali', sans-serif;
  --uia3783-font-body: 'Hind Siliguri', 'Noto Sans Bengali', 'Segoe UI', sans-serif;
  --uia3783-topbar-h: 56px;
  --uia3783-tabbar-h: 62px;
  --uia3783-frame: 430px;               /* phone canvas width */
}

/* ---------- reset & canvas ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  background: #05050e;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0 auto;
  max-width: var(--uia3783-frame);
  max-width: 430px;                     /* literal phone canvas cap */
  min-height: 100vh;
  min-height: 430px;
  background: var(--uia3783-ink);
  color: var(--uia3783-paper);
  font-family: var(--uia3783-font-body);
  font-size: 15px;
  line-height: 1.7;
  box-shadow: 0 0 0 1px rgba(255, 145, 164, 0.08), 0 0 44px rgba(0, 0, 0, 0.8);
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }

a { color: var(--uia3783-rose); text-decoration: none; }
a:hover { color: #ffc4cf; }

button {
  font-family: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

h1, h2, h3, h4 {
  font-family: var(--uia3783-font-head);
  line-height: 1.35;
  margin: 0 0 0.5em;
  font-weight: 700;
}

p { margin: 0 0 0.9em; }

ul, ol { margin: 0 0 0.9em; padding-left: 1.15em; }

:focus-visible {
  outline: 2px solid var(--uia3783-rose);
  outline-offset: 2px;
  border-radius: var(--uia3783-edge);
}

.uia3783-skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--uia3783-paper);
  color: var(--uia3783-ink);
  padding: 8px 14px;
  z-index: 120;
  font-weight: 600;
}
.uia3783-skip:focus { left: 8px; top: 8px; }

/* Lock scroll while the route panel is open */
body.uia3783-locked { overflow: hidden; }

/* ---------- top bar: edge-aligned functional header ---------- */
.uia3783-topbar {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 430px;
  height: var(--uia3783-topbar-h);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 10px;
  padding-top: env(safe-area-inset-top);
  height: calc(var(--uia3783-topbar-h) + env(safe-area-inset-top));
  background: rgba(15, 15, 35, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--uia3783-line);
  z-index: 90;
}

.uia3783-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-right: auto;
  min-width: 0;
}

.uia3783-brand img {
  width: 34px;
  height: 34px;
  border-radius: var(--uia3783-edge);
  border: 1px solid var(--uia3783-line-strong);
  flex: 0 0 auto;
}

.uia3783-brand-name {
  font-family: var(--uia3783-font-head);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.2px;
  color: var(--uia3783-paper);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.uia3783-brand-name b { color: var(--uia3783-rose); font-weight: 700; }

/* header action cluster */
.uia3783-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
}

.uia3783-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 5px 12px;
  border-radius: var(--uia3783-edge-soft);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.2;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.15s ease;
}

.uia3783-btn:active { transform: translateY(1px); }

.uia3783-btn-register {
  background: linear-gradient(135deg, var(--uia3783-flame), #ff7a45);
  color: #fff;
  box-shadow: 0 2px 10px rgba(255, 87, 34, 0.35);
}
.uia3783-btn-register:hover { background: linear-gradient(135deg, #ff6a38, #ff8f60); color: #fff; }

.uia3783-btn-login {
  border: 1px solid var(--uia3783-line-strong);
  color: var(--uia3783-paper);
  background: rgba(248, 249, 250, 0.04);
}
.uia3783-btn-login:hover { border-color: var(--uia3783-rose); color: var(--uia3783-rose); }

.uia3783-burger {
  width: 38px;
  height: 38px;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  border: 1px solid var(--uia3783-line);
  border-radius: var(--uia3783-edge);
  transition: border-color 0.25s ease;
}
.uia3783-burger:hover { border-color: var(--uia3783-rose); }
.uia3783-burger span {
  display: block;
  width: 16px;
  height: 2px;
  background: var(--uia3783-paper);
  border-radius: 1px;
  transition: background-color 0.25s ease, width 0.25s ease;
}
.uia3783-burger:hover span { background: var(--uia3783-rose); }
.uia3783-burger span:nth-child(2) { width: 11px; }

/* ---------- slide-up route panel ---------- */
.uia3783-veil {
  position: fixed;
  inset: 0;
  background: rgba(5, 5, 14, 0.66);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  z-index: 95;
}
.uia3783-veil-on { opacity: 1; visibility: visible; }

.uia3783-route {
  position: fixed;
  left: 50%;
  bottom: 0;
  transform: translate(-50%, 102%);
  width: 100%;
  max-width: 430px;
  max-height: 74vh;
  background: var(--uia3783-ink-raised);
  border: 1px solid var(--uia3783-line);
  border-bottom: 0;
  border-radius: 10px 10px 0 0;
  padding: 10px 14px calc(16px + env(safe-area-inset-bottom));
  overflow-y: auto;
  transition: transform 0.34s cubic-bezier(0.22, 0.9, 0.3, 1);
  z-index: 96;
}
.uia3783-route-on { transform: translate(-50%, 0); }

.uia3783-route-grip {
  width: 42px;
  height: 4px;
  border-radius: 2px;
  background: var(--uia3783-line-strong);
  margin: 2px auto 10px;
}

.uia3783-route-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}
.uia3783-route-title {
  font-family: var(--uia3783-font-head);
  font-size: 15px;
  font-weight: 700;
  color: var(--uia3783-rose);
  margin: 0;
}
.uia3783-route-close {
  width: 32px;
  height: 32px;
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--uia3783-line);
  border-radius: var(--uia3783-edge);
  color: var(--uia3783-muted);
  font-size: 16px;
  transition: color 0.25s ease, border-color 0.25s ease;
}
.uia3783-route-close:hover { color: var(--uia3783-rose); border-color: var(--uia3783-rose); }

.uia3783-route-group {
  font-size: 11px;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--uia3783-faint);
  margin: 12px 2px 6px;
}

.uia3783-route-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.uia3783-route-list a {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 10px;
  border: 1px solid var(--uia3783-line);
  border-radius: var(--uia3783-edge);
  background: rgba(248, 249, 250, 0.03);
  color: var(--uia3783-paper);
  font-size: 13.5px;
  font-weight: 500;
  transition: border-color 0.25s ease, color 0.25s ease, background-color 0.25s ease;
}
.uia3783-route-list a:hover {
  border-color: var(--uia3783-rose);
  color: var(--uia3783-rose);
  background: rgba(255, 145, 164, 0.06);
}
.uia3783-route-list .uia3783-route-ico {
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  color: var(--uia3783-muted);
  transition: color 0.25s ease;
}
.uia3783-route-list a:hover .uia3783-route-ico { color: var(--uia3783-rose); }

/* ---------- main canvas spacing ---------- */
.uia3783-main {
  padding: calc(var(--uia3783-topbar-h) + 10px + env(safe-area-inset-top)) 12px
           calc(var(--uia3783-tabbar-h) + 22px + env(safe-area-inset-bottom));
}

/* ---------- hero carousel ---------- */
.uia3783-hero {
  position: relative;
  margin: 4px 0 14px;
  border: 1px solid var(--uia3783-line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--uia3783-ink-deep);
  touch-action: pan-y;
}

.uia3783-hero-track {
  display: flex;
  transition: transform 0.45s cubic-bezier(0.3, 0.8, 0.3, 1);
}

.uia3783-slide {
  position: relative;
  flex: 0 0 100%;
  width: 100%;
  aspect-ratio: 16 / 9;
  min-height: 178px;
}

.uia3783-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.uia3783-slide-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 26px 12px 12px;
  background: linear-gradient(180deg, rgba(15, 15, 35, 0) 0%, rgba(15, 15, 35, 0.86) 58%, rgba(9, 9, 23, 0.95) 100%);
  text-align: left;
}

.uia3783-slide-title {
  font-family: var(--uia3783-font-head);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--uia3783-paper);
  margin: 0;
}
.uia3783-slide-title b { color: var(--uia3783-rose); }

.uia3783-slide-cta {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 34px;
  padding: 5px 13px;
  border-radius: var(--uia3783-edge-soft);
  background: linear-gradient(135deg, var(--uia3783-flame), #ff7a45);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  transition: filter 0.25s ease, transform 0.15s ease;
}
.uia3783-slide-cta:active { transform: translateY(1px); }
.uia3783-slide-cta:hover { filter: brightness(1.08); color: #fff; }

.uia3783-hero-dots {
  position: absolute;
  right: 10px;
  bottom: 8px;
  display: flex;
  gap: 6px;
  z-index: 2;
}

.uia3783-dot {
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.uia3783-dot::after {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(248, 249, 250, 0.4);
  transition: background-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}
.uia3783-dot:hover::after { background: var(--uia3783-paper); }
.uia3783-dot-on::after {
  background: var(--uia3783-rose);
  transform: scale(1.35);
  box-shadow: 0 0 8px rgba(255, 145, 164, 0.8);
}

/* ---------- intro block ---------- */
.uia3783-intro {
  border-left: 3px solid var(--uia3783-flame);
  padding: 2px 0 2px 10px;
  margin: 0 0 18px;
}

.uia3783-h1 {
  font-size: 22px;
  margin: 0 0 8px;
}

.uia3783-lead {
  font-size: 14.5px;
  color: var(--uia3783-muted);
}
.uia3783-lead strong { color: var(--uia3783-paper); font-weight: 600; }

/* ---------- section shell ---------- */
.uia3783-section { margin: 0 0 22px; }

.uia3783-sec-head {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--uia3783-line);
  padding-bottom: 6px;
  margin-bottom: 4px;
}

.uia3783-h2 {
  font-size: 17.5px;
  margin: 0;
}

.uia3783-count {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 1px 8px;
  border: 1px solid rgba(255, 145, 164, 0.4);
  border-radius: var(--uia3783-edge-soft);
  background: rgba(255, 145, 164, 0.08);
  color: var(--uia3783-rose);
  font-size: 11px;
  font-weight: 600;
  font-family: var(--uia3783-font-body);
  letter-spacing: 0.3px;
}

.uia3783-sec-note {
  font-size: 13.5px;
  color: var(--uia3783-muted);
  margin: 8px 0 10px;
}

/* ---------- game grid: image card with bottom name bar ---------- */
.uia3783-ggrid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 7px;
}

@media (min-width: 375px) {
  .uia3783-ggrid { gap: 8px; }
}

@media (min-width: 400px) {
  .uia3783-ggrid { grid-template-columns: repeat(5, 1fr); }
}

.uia3783-gcard {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--uia3783-line);
  border-radius: var(--uia3783-edge);
  background: var(--uia3783-ink-card);
  overflow: hidden;
  text-align: center;
  transition: border-color 0.25s ease, transform 0.15s ease;
}
.uia3783-gcard:hover { border-color: var(--uia3783-rose); }
.uia3783-gcard:active { transform: translateY(1px); }

.uia3783-gcard img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: var(--uia3783-ink-deep);
}

.uia3783-gname {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 30px;
  padding: 3px 4px;
  border-top: 1px solid var(--uia3783-line);
  background: rgba(9, 9, 23, 0.6);
  font-size: 10.5px;
  line-height: 1.3;
  font-weight: 500;
  color: var(--uia3783-muted);
  transition: color 0.25s ease, background-color 0.25s ease;
  /* controlled wrap for long Bengali titles */
  overflow-wrap: anywhere;
  word-break: break-word;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.uia3783-gcard:hover .uia3783-gname {
  color: var(--uia3783-rose);
  background: rgba(255, 145, 164, 0.08);
}

/* related page strip under a category */
.uia3783-rel {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  margin-top: 10px;
  padding: 8px 10px;
  border: 1px dashed var(--uia3783-line-strong);
  border-radius: var(--uia3783-edge);
  font-size: 12.5px;
  color: var(--uia3783-faint);
}
.uia3783-rel a {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  color: var(--uia3783-rose);
  font-weight: 500;
  transition: color 0.25s ease;
}
.uia3783-rel a:hover { color: #ffc4cf; text-decoration: underline; }

/* ---------- content modules ---------- */
.uia3783-module {
  border: 1px solid var(--uia3783-line);
  border-radius: 6px;
  background: linear-gradient(180deg, rgba(23, 23, 50, 0.75), rgba(15, 15, 35, 0.4));
  padding: 14px 12px;
  margin: 0 0 20px;
}

.uia3783-module > .uia3783-h2 { font-size: 17px; }

.uia3783-module p { font-size: 14px; color: var(--uia3783-muted); }
.uia3783-module p strong,
.uia3783-module li strong { color: var(--uia3783-paper); font-weight: 600; }

/* milestone tiles (progress / achievements) */
.uia3783-tiles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin: 12px 0;
}

.uia3783-tile {
  display: flex;
  gap: 9px;
  align-items: flex-start;
  padding: 10px 9px;
  border: 1px solid var(--uia3783-line);
  border-radius: var(--uia3783-edge);
  background: rgba(9, 9, 23, 0.45);
}

.uia3783-tile-ico {
  flex: 0 0 30px;
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--uia3783-edge);
  background: rgba(255, 145, 164, 0.1);
  color: var(--uia3783-rose);
  transition: background-color 0.25s ease, color 0.25s ease;
}
.uia3783-tile:hover .uia3783-tile-ico {
  background: var(--uia3783-rose);
  color: var(--uia3783-ink);
}

.uia3783-tile-t {
  font-family: var(--uia3783-font-head);
  font-size: 13.5px;
  font-weight: 700;
  margin: 0 0 2px;
  color: var(--uia3783-paper);
}

.uia3783-tile-d {
  font-size: 12px;
  line-height: 1.55;
  color: var(--uia3783-muted);
  margin: 0;
}

/* two-path comparison (browser vs app) */
.uia3783-paths {
  display: grid;
  gap: 8px;
  margin: 12px 0;
}

@media (min-width: 380px) {
  .uia3783-paths { grid-template-columns: 1fr 1fr; }
}

.uia3783-path {
  border: 1px solid var(--uia3783-line);
  border-radius: var(--uia3783-edge);
  background: rgba(9, 9, 23, 0.45);
  padding: 10px;
}

.uia3783-path-t {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--uia3783-font-head);
  font-size: 14px;
  font-weight: 700;
  color: var(--uia3783-rose);
  margin: 0 0 8px;
}

.uia3783-path ol { margin: 0; padding-left: 1.1em; }
.uia3783-path li { font-size: 12.5px; line-height: 1.6; color: var(--uia3783-muted); margin-bottom: 5px; }
.uia3783-path li:last-child { margin-bottom: 0; }

/* style comparison rows */
.uia3783-versus {
  border: 1px solid var(--uia3783-line);
  border-radius: var(--uia3783-edge);
  overflow: hidden;
  margin: 12px 0;
}

.uia3783-vs-row {
  display: grid;
  grid-template-columns: 1fr;
  border-bottom: 1px solid var(--uia3783-line);
}
.uia3783-vs-row:last-child { border-bottom: 0; }

.uia3783-vs-row-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 10px;
  background: rgba(255, 145, 164, 0.06);
  font-family: var(--uia3783-font-head);
  font-weight: 700;
  font-size: 13.5px;
  color: var(--uia3783-paper);
}
.uia3783-vs-row-head svg { color: var(--uia3783-flame); flex: 0 0 auto; }

.uia3783-vs-cells {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.uia3783-vs-cell {
  padding: 8px 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--uia3783-muted);
}
.uia3783-vs-cell + .uia3783-vs-cell { border-left: 1px solid var(--uia3783-line); }
.uia3783-vs-cell b {
  display: block;
  font-size: 10.5px;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  color: var(--uia3783-faint);
  font-weight: 600;
  margin-bottom: 3px;
}

/* checklist */
.uia3783-checklist {
  list-style: none;
  margin: 12px 0;
  padding: 0;
}

.uia3783-checklist li {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 9px;
  padding: 8px 2px;
  border-bottom: 1px dashed var(--uia3783-line);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--uia3783-muted);
}
.uia3783-checklist li:last-child { border-bottom: 0; }

.uia3783-check-box {
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--uia3783-rose);
  border-radius: 3px;
  color: var(--uia3783-rose);
  transition: background-color 0.25s ease, color 0.25s ease;
}
.uia3783-checklist li:hover .uia3783-check-box {
  background: var(--uia3783-rose);
  color: var(--uia3783-ink);
}

.uia3783-verdict {
  margin: 10px 0 0;
  padding: 10px 11px;
  border-left: 3px solid var(--uia3783-flame);
  border-radius: var(--uia3783-edge);
  background: rgba(255, 87, 34, 0.08);
  font-size: 13px;
  color: var(--uia3783-paper);
}

/* Q&A inside modules */
.uia3783-qa {
  margin: 14px 0 0;
  border-top: 1px solid var(--uia3783-line);
  padding-top: 12px;
}

.uia3783-qa h3 {
  font-size: 14px;
  color: var(--uia3783-rose);
  margin: 0 0 4px;
}
.uia3783-qa p { font-size: 13px; margin-bottom: 10px; }
.uia3783-qa p:last-child { margin-bottom: 0; }

/* ---------- extended footer (site-specific) ---------- */
.uia3783-ext {
  border-top: 2px solid var(--uia3783-flame);
  background: var(--uia3783-ink-deep);
  padding: 16px 12px 10px;
  margin-top: 4px;
}

.uia3783-ext-h2 {
  font-size: 16px;
  color: var(--uia3783-paper);
  margin: 0 0 10px;
}

.uia3783-ext-brand {
  font-size: 13px;
  color: var(--uia3783-muted);
  margin: 0 0 14px;
}

.uia3783-ext-h3 {
  font-size: 12px;
  letter-spacing: 0.7px;
  text-transform: uppercase;
  color: var(--uia3783-faint);
  margin: 14px 0 7px;
}

/* page directory: short labels */
.uia3783-dir {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.uia3783-dir a {
  display: flex;
  align-items: center;
  min-height: 30px;
  font-size: 12.5px;
  color: var(--uia3783-muted);
  border-bottom: 1px dotted var(--uia3783-line);
  transition: color 0.25s ease;
}
.uia3783-dir a:hover { color: var(--uia3783-rose); }

/* promotion list: 5 distinct entries */
.uia3783-promos {
  display: grid;
  gap: 7px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.uia3783-promo {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 46px;
  padding: 8px 11px;
  border: 1px solid rgba(255, 145, 164, 0.28);
  border-radius: var(--uia3783-edge-soft);
  background: linear-gradient(90deg, rgba(255, 87, 34, 0.1), rgba(255, 145, 164, 0.05));
  text-align: left;
  transition: border-color 0.25s ease, background-color 0.25s ease;
}
.uia3783-promo:hover { border-color: var(--uia3783-rose); background: linear-gradient(90deg, rgba(255, 87, 34, 0.18), rgba(255, 145, 164, 0.1)); }

.uia3783-promo-ico {
  flex: 0 0 20px;
  color: var(--uia3783-rose);
  transition: color 0.25s ease, transform 0.25s ease;
}
.uia3783-promo:hover .uia3783-promo-ico { color: #ffc4cf; transform: translateY(-1px); }

.uia3783-promo-tx { min-width: 0; }
.uia3783-promo-t {
  display: block;
  font-family: var(--uia3783-font-head);
  font-size: 13.5px;
  font-weight: 700;
  color: var(--uia3783-paper);
}
.uia3783-promo-d {
  display: block;
  font-size: 11.5px;
  color: var(--uia3783-muted);
  line-height: 1.45;
}
.uia3783-promo-arrow {
  margin-left: auto;
  flex: 0 0 auto;
  font-size: 15px;
  color: var(--uia3783-flame);
}

.uia3783-disclaimer {
  margin: 14px 0 0;
  padding: 9px 11px;
  border: 1px dashed var(--uia3783-line-strong);
  border-radius: var(--uia3783-edge);
  font-size: 11.5px;
  line-height: 1.65;
  color: var(--uia3783-faint);
}

/* ---------- common footer ---------- */
.uia3783-foot {
  padding: 12px 14px 10px;
  text-align: center;
  font-size: 11.5px;
  color: var(--uia3783-faint);
  border-top: 1px solid var(--uia3783-line);
  background: #060610;
}

.uia3783-foot b { color: var(--uia3783-muted); font-weight: 600; }

/* ---------- bottom tab bar: brand accent band ---------- */
.uia3783-tabbar {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 430px;
  height: calc(var(--uia3783-tabbar-h) + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  background: linear-gradient(180deg, rgba(28, 28, 58, 0.97), rgba(15, 15, 35, 0.99));
  border-top: 2px solid;
  border-image: linear-gradient(90deg, var(--uia3783-flame), var(--uia3783-rose), var(--uia3783-flame)) 1;
  z-index: 88;
}

.uia3783-tab {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  min-height: 44px;
  padding: 6px 2px 4px;
  color: var(--uia3783-muted);
  font-size: 10.5px;
  font-weight: 500;
  transition: color 0.25s ease;
}

.uia3783-tab svg {
  width: 21px;
  height: 21px;
  transition: color 0.25s ease, transform 0.25s ease;
}

.uia3783-tab:hover { color: var(--uia3783-rose); }
.uia3783-tab:hover svg { transform: translateY(-1px); }

/* active state: contrast inversion with accent indicator */
.uia3783-tab-on {
  color: var(--uia3783-ink);
  background: linear-gradient(180deg, var(--uia3783-rose), #ffb3c0);
  border-radius: 6px 6px 0 0;
  margin-top: 3px;
  font-weight: 700;
}
.uia3783-tab-on svg { color: var(--uia3783-ink); }

.uia3783-tab-live::before {
  content: "";
  position: absolute;
  top: 3px;
  right: calc(50% - 16px);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--uia3783-flame);
  box-shadow: 0 0 6px rgba(255, 87, 34, 0.9);
}

/* ---------- small helpers ---------- */
.uia3783-note {
  font-size: 12px;
  color: var(--uia3783-faint);
}

.uia3783-kbd {
  display: inline-block;
  padding: 0 6px;
  border: 1px solid var(--uia3783-line-strong);
  border-radius: 3px;
  font-size: 11px;
  color: var(--uia3783-muted);
}

/* ---------- narrow canvas fine-tuning (320px) ---------- */
@media (max-width: 340px) {
  .uia3783-btn { padding: 5px 9px; font-size: 12px; }
  .uia3783-brand-name { font-size: 16px; }
  .uia3783-h1 { font-size: 20px; }
  .uia3783-h2 { font-size: 16px; }
  .uia3783-slide-title { font-size: 14.5px; }
}

/* ---------- wide screens: keep the phone canvas readable ---------- */
@media (min-width: 430px) {
  body { border-left: 1px solid var(--uia3783-line); border-right: 1px solid var(--uia3783-line); }
  .uia3783-slide { aspect-ratio: 16 / 8; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}