/* ===================================================================
   75bdt.click — shared canvas stylesheet
   File   : css/75bdt-canvas-80b4bf.css
   Prefix : surface0b4bf-
   Canvas : 320–430px mobile frame, centered as-is on wide screens
   Idea   : dark graphite base, orange/blue twin accents, square-cut
            CTAs against softly rounded panels (mixed radius system)
   =================================================================== */

/* ---------------------------------------------------------------
   1. Tokens
   --------------------------------------------------------------- */
:root {
  --surface0b4bf-bg:        #1E1E1E;
  --surface0b4bf-backdrop:  #101012;
  --surface0b4bf-panel:     #26262B;
  --surface0b4bf-panel2:    #2D2D34;
  --surface0b4bf-panel3:    #34343C;
  --surface0b4bf-line:      rgba(233, 236, 239, 0.14);
  --surface0b4bf-lineSoft:  rgba(233, 236, 239, 0.08);
  --surface0b4bf-text:      #E9ECEF;
  --surface0b4bf-muted:     #A9AFBB;
  --surface0b4bf-orange:    #FF8C00;
  --surface0b4bf-orangeHi:  #FFB057;
  --surface0b4bf-blue:      #1E90FF;
  --surface0b4bf-sky:       #ADD8E6;
  --surface0b4bf-butter:    #EEE8AA;
  --surface0b4bf-shadow:    0 12px 30px rgba(0, 0, 0, 0.45);
  --surface0b4bf-rLg: 16px;
  --surface0b4bf-rMd: 10px;
  --surface0b4bf-rSm: 7px;
  --surface0b4bf-headH: 104px;
  --surface0b4bf-dockH: 62px;
}

/* ---------------------------------------------------------------
   2. Reset + base
   --------------------------------------------------------------- */
* { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; }

body {
  background: var(--surface0b4bf-backdrop);
  color: var(--surface0b4bf-text);
  font-family: "Hind Siliguri", "Noto Sans Bengali", "SolaimanLipi",
               "Kalpurush", "Segoe UI", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}

/* lock scroll while the slide-in menu is open */
body.surface0b4bf-lock { overflow: hidden; }

img { display: block; max-width: 100%; border: 0; }

ul, ol { list-style: none; }

a {
  color: var(--surface0b4bf-blue);
  text-decoration: none;
}
a:hover { color: var(--surface0b4bf-sky); }

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

:focus-visible {
  outline: 2px solid var(--surface0b4bf-blue);
  outline-offset: 2px;
}

/* ---------------------------------------------------------------
   3. Phone canvas — stays a phone-width column on any screen
   --------------------------------------------------------------- */
.surface0b4bf-page {
  position: relative;
  width: 100%;
  max-width: 430px;
  margin: 0 auto;
  min-height: 100vh;
  background: var(--surface0b4bf-bg);
  box-shadow: 0 0 0 1px rgba(233, 236, 239, 0.06);
}

@media (min-width: 431px) {
  .surface0b4bf-page {
    box-shadow: 0 0 0 1px rgba(233, 236, 239, 0.08),
                0 24px 70px rgba(0, 0, 0, 0.6);
  }
}

/* main column clears fixed header + fixed dock */
.surface0b4bf-main {
  padding-top: calc(var(--surface0b4bf-headH) + 6px);
  padding-bottom: calc(var(--surface0b4bf-dockH) + 26px);
}

/* ---------------------------------------------------------------
   4. Fixed top bar — centered identity strip + action strip
   --------------------------------------------------------------- */
.surface0b4bf-topbar {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 430px;
  z-index: 60;
  background: linear-gradient(180deg, #232329 0%, #202025 100%);
  border-bottom: 1px solid var(--surface0b4bf-line);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
}

/* identity strip: logo + name only, centered */
.surface0b4bf-brandRow {
  display: flex;
  justify-content: center;
  padding: 7px 12px 5px;
}

.surface0b4bf-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  color: var(--surface0b4bf-text);
}

.surface0b4bf-logo {
  width: 36px;
  height: 36px;
  border-radius: var(--surface0b4bf-rSm);
  border: 1px solid var(--surface0b4bf-line);
  object-fit: cover;
}

.surface0b4bf-brandName {
  font-size: 21px;
  font-weight: 800;
  letter-spacing: 0.4px;
  color: var(--surface0b4bf-butter);
}

/* action strip: register / login / menu */
.surface0b4bf-actionRow {
  display: grid;
  grid-template-columns: 1fr 1fr 56px;
  gap: 8px;
  padding: 6px 12px 9px;
}

.surface0b4bf-btnReg,
.surface0b4bf-btnLog,
.surface0b4bf-menuBtn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-weight: 700;
  font-size: 14px;
  border-radius: 3px;            /* square-cut CTA language */
  transition: transform 0.12s ease, filter 0.12s ease;
}

.surface0b4bf-btnReg {
  background: var(--surface0b4bf-orange);
  color: #1E1E1E;
}
.surface0b4bf-btnReg:active { transform: scale(0.96); filter: brightness(1.1); }

.surface0b4bf-btnLog {
  background: transparent;
  color: var(--surface0b4bf-sky);
  border: 1.5px solid var(--surface0b4bf-blue);
}
.surface0b4bf-btnLog:active { transform: scale(0.96); background: rgba(30, 144, 255, 0.12); }

.surface0b4bf-menuBtn {
  background: var(--surface0b4bf-panel2);
  color: var(--surface0b4bf-text);
  border: 1px solid var(--surface0b4bf-line);
  font-size: 12px;
}
.surface0b4bf-menuBtn:active { transform: scale(0.94); }
.surface0b4bf-menuBtn svg { width: 18px; height: 18px; }

/* ---------------------------------------------------------------
   5. Slide-in sectioned menu
   --------------------------------------------------------------- */
.surface0b4bf-menu {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 100%;
  max-width: 430px;
  z-index: 80;
  background: #202026;
  border-left: 1px solid var(--surface0b4bf-line);
  transform: translate(calc(-50% + 102%), 0);
  transition: transform 0.28s cubic-bezier(0.22, 0.9, 0.3, 1);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  visibility: hidden;
}

.surface0b4bf-menu.is-open {
  transform: translate(-50%, 0);
  visibility: visible;
}

.surface0b4bf-menuHead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--surface0b4bf-line);
  position: sticky;
  top: 0;
  background: #202026;
  z-index: 2;
}

.surface0b4bf-menuTitle {
  font-size: 17px;
  font-weight: 800;
  color: var(--surface0b4bf-butter);
}

.surface0b4bf-menuClose {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--surface0b4bf-panel2);
  border: 1px solid var(--surface0b4bf-line);
  border-radius: var(--surface0b4bf-rSm);
  color: var(--surface0b4bf-text);
}
.surface0b4bf-menuClose:active { transform: scale(0.92); }
.surface0b4bf-menuClose svg { width: 20px; height: 20px; }

.surface0b4bf-menuSec { padding: 14px 16px 4px; }

.surface0b4bf-menuLabel {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--surface0b4bf-orange);
  margin-bottom: 8px;
}

.surface0b4bf-menuList li + li { margin-top: 6px; }

.surface0b4bf-menuList a {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 46px;
  padding: 8px 12px;
  background: var(--surface0b4bf-panel);
  border: 1px solid var(--surface0b4bf-lineSoft);
  border-radius: var(--surface0b4bf-rMd);
  color: var(--surface0b4bf-text);
  font-weight: 600;
}
.surface0b4bf-menuList a:active { transform: scale(0.98); border-color: var(--surface0b4bf-blue); }
.surface0b4bf-menuList a::before {
  content: "";
  width: 7px;
  height: 7px;
  background: var(--surface0b4bf-blue);
  flex: none;
}
.surface0b4bf-menuList a:hover { color: var(--surface0b4bf-sky); }

.surface0b4bf-menuCta {
  margin: 16px 16px 26px;
  display: block;
  width: calc(100% - 32px);
  min-height: 48px;
  background: var(--surface0b4bf-orange);
  color: #1E1E1E;
  font-weight: 800;
  font-size: 15px;
  border-radius: 3px;
}
.surface0b4bf-menuCta:active { transform: scale(0.97); }

.surface0b4bf-menuMask {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: rgba(10, 10, 12, 0.62);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.surface0b4bf-menuMask.is-on { opacity: 1; pointer-events: auto; }

/* ---------------------------------------------------------------
   6. Hero
   --------------------------------------------------------------- */
.surface0b4bf-hero {
  position: relative;
  min-height: 430px;
  padding: 22px 16px 24px;
  background:
    radial-gradient(120% 90% at 85% -10%, rgba(255, 140, 0, 0.22) 0%, rgba(255, 140, 0, 0) 55%),
    radial-gradient(110% 80% at -10% 110%, rgba(30, 144, 255, 0.20) 0%, rgba(30, 144, 255, 0) 55%),
    #222227;
  border-bottom: 1px solid var(--surface0b4bf-line);
  overflow: hidden;
}

.surface0b4bf-hero::after {
  content: "";
  position: absolute;
  right: -34px;
  top: -34px;
  width: 128px;
  height: 128px;
  border: 2px solid rgba(238, 232, 170, 0.25);
  transform: rotate(45deg);
  pointer-events: none;
}

.surface0b4bf-hero h1 {
  font-size: clamp(23px, 6.8vw, 29px);
  line-height: 1.32;
  font-weight: 800;
  color: var(--surface0b4bf-butter);
  margin-bottom: 12px;
}

.surface0b4bf-hero p {
  color: var(--surface0b4bf-text);
  font-size: 14px;
  margin-bottom: 10px;
}

.surface0b4bf-heroCta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
  position: relative;
  z-index: 1;
}

.surface0b4bf-heroGo,
.surface0b4bf-heroHow {
  flex: 1 1 150px;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 15px;
  border-radius: 3px;
  transition: transform 0.12s ease;
}
.surface0b4bf-heroGo {
  background: var(--surface0b4bf-orange);
  color: #1E1E1E;
}
.surface0b4bf-heroGo:active { transform: scale(0.96); }
.surface0b4bf-heroHow {
  background: transparent;
  color: var(--surface0b4bf-sky);
  border: 1.5px solid var(--surface0b4bf-blue);
}
.surface0b4bf-heroHow:active { transform: scale(0.96); }

/* ---------------------------------------------------------------
   7. Banner carousel
   --------------------------------------------------------------- */
.surface0b4bf-caroSec { padding: 18px 14px 4px; }

.surface0b4bf-caro {
  position: relative;
  border-radius: var(--surface0b4bf-rLg);
  overflow: hidden;
  border: 1px solid var(--surface0b4bf-line);
  background: var(--surface0b4bf-panel);
  box-shadow: var(--surface0b4bf-shadow);
}

.surface0b4bf-caroTrack {
  display: flex;
  transition: transform 0.45s cubic-bezier(0.3, 0.8, 0.3, 1);
  touch-action: pan-y;
}

.surface0b4bf-caroSlide {
  position: relative;
  flex: 0 0 100%;
  width: 100%;
  display: block;
  text-align: left;
}

.surface0b4bf-caroSlide img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.surface0b4bf-caroCap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 34px 14px 12px;
  background: linear-gradient(180deg, rgba(20, 20, 24, 0) 0%, rgba(16, 16, 18, 0.92) 78%);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 10px;
}

.surface0b4bf-caroCap strong {
  display: block;
  font-size: 15px;
  font-weight: 800;
  color: #FFFFFF;
  line-height: 1.4;
}

.surface0b4bf-caroCap small {
  display: block;
  font-size: 12px;
  color: var(--surface0b4bf-butter);
}

.surface0b4bf-caroKick {
  flex: none;
  min-height: 40px;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  background: var(--surface0b4bf-orange);
  color: #1E1E1E;
  font-weight: 800;
  font-size: 12.5px;
  border-radius: 3px;
}
.surface0b4bf-caroSlide:active .surface0b4bf-caroKick { transform: scale(0.94); }

.surface0b4bf-caroDots {
  position: absolute;
  right: 12px;
  top: 12px;
  display: flex;
  gap: 6px;
  z-index: 3;
}

.surface0b4bf-dot {
  width: 9px;
  height: 9px;
  background: rgba(233, 236, 239, 0.4);
  border-radius: 2px;
  padding: 0;
}
.surface0b4bf-dot.is-on { background: var(--surface0b4bf-orange); }

/* ---------------------------------------------------------------
   8. Fact chips under the carousel
   --------------------------------------------------------------- */
.surface0b4bf-chips {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding: 12px 14px 4px;
}

.surface0b4bf-chips li {
  background: var(--surface0b4bf-panel);
  border: 1px solid var(--surface0b4bf-lineSoft);
  border-radius: var(--surface0b4bf-rMd);
  padding: 10px 6px;
  text-align: center;
}

.surface0b4bf-chips b {
  display: block;
  font-size: 16px;
  font-weight: 800;
  color: var(--surface0b4bf-butter);
}

.surface0b4bf-chips span {
  display: block;
  font-size: 11px;
  color: var(--surface0b4bf-muted);
  margin-top: 2px;
}

/* ---------------------------------------------------------------
   9. Generic section shell + game grids
   --------------------------------------------------------------- */
.surface0b4bf-sec {
  padding: 24px 14px 6px;
  scroll-margin-top: calc(var(--surface0b4bf-headH) + 10px);
}

.surface0b4bf-secHead {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
}

.surface0b4bf-h2 {
  position: relative;
  font-size: 18px;
  line-height: 1.45;
  font-weight: 800;
  color: var(--surface0b4bf-butter);
  padding-left: 13px;
}
.surface0b4bf-h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 5px;
  background: var(--surface0b4bf-orange);
}

.surface0b4bf-secTag {
  flex: none;
  margin-top: 3px;
  padding: 3px 9px;
  font-size: 11px;
  font-weight: 700;
  color: var(--surface0b4bf-sky);
  border: 1px solid var(--surface0b4bf-blue);
  border-radius: 3px;
  white-space: nowrap;
}

.surface0b4bf-lead {
  color: var(--surface0b4bf-muted);
  font-size: 13.5px;
  margin-bottom: 14px;
}
.surface0b4bf-lead a { color: var(--surface0b4bf-blue); font-weight: 600; }

/* 4 columns on 320px, 5 columns from 375px up */
.surface0b4bf-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px 8px;
}

@media (min-width: 375px) {
  .surface0b4bf-grid { grid-template-columns: repeat(5, 1fr); }
}

.surface0b4bf-card {
  width: 100%;
  text-align: center;
  transition: transform 0.14s ease;
}
.surface0b4bf-card:active {
  transform: translateY(-3px) scale(1.02);   /* light card lift */
}

.surface0b4bf-thumb {
  display: block;
  border-radius: var(--surface0b4bf-rMd);
  overflow: hidden;
  border: 1px solid var(--surface0b4bf-lineSoft);
  background: var(--surface0b4bf-panel);
}

.surface0b4bf-thumb img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.surface0b4bf-cardName {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-top: 6px;
  font-size: 11px;
  line-height: 1.45;
  color: var(--surface0b4bf-text);
  overflow-wrap: anywhere;
  min-height: 32px;
}

/* ---------------------------------------------------------------
   10. Content modules (panel rhythm for long-form blocks)
   --------------------------------------------------------------- */
.surface0b4bf-panel {
  margin: 22px 14px 0;
  padding: 18px 15px 8px;
  background: var(--surface0b4bf-panel);
  border: 1px solid var(--surface0b4bf-lineSoft);
  border-radius: var(--surface0b4bf-rLg);
}

.surface0b4bf-panel .surface0b4bf-h2 { margin-bottom: 10px; }

/* 10a. scannable compare rows */
.surface0b4bf-cmp { margin-bottom: 12px; }

.surface0b4bf-cmpRow {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--surface0b4bf-lineSoft);
}
.surface0b4bf-cmpRow:last-child { border-bottom: 0; }

.surface0b4bf-cmpRow dt {
  font-size: 12.5px;
  font-weight: 800;
  color: var(--surface0b4bf-orangeHi);
  line-height: 1.5;
}

.surface0b4bf-cmpRow dd {
  font-size: 13px;
  color: var(--surface0b4bf-text);
  line-height: 1.65;
}

/* 10b. step rail (step-by-step reading rhythm) */
.surface0b4bf-steps {
  counter-reset: surface0b4bfStep;
  position: relative;
  margin: 6px 0 12px;
}

.surface0b4bf-steps li {
  position: relative;
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  padding-bottom: 16px;
}

.surface0b4bf-steps li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 34px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--surface0b4bf-blue), rgba(30, 144, 255, 0.12));
}
.surface0b4bf-steps li:last-child::before { display: none; }

.surface0b4bf-stepNo {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--surface0b4bf-panel3);
  border: 1px solid var(--surface0b4bf-blue);
  border-radius: var(--surface0b4bf-rSm);
  color: var(--surface0b4bf-sky);
  font-weight: 800;
  font-size: 15px;
}

.surface0b4bf-steps h3 {
  font-size: 14px;
  font-weight: 800;
  color: var(--surface0b4bf-text);
  line-height: 1.5;
  margin: 4px 0 2px;
}

.surface0b4bf-steps p {
  font-size: 13px;
  color: var(--surface0b4bf-muted);
}
.surface0b4bf-steps p a { color: var(--surface0b4bf-blue); font-weight: 600; }

.surface0b4bf-note {
  margin: 0 0 14px;
  padding: 10px 12px;
  background: rgba(255, 140, 0, 0.1);
  border-left: 3px solid var(--surface0b4bf-orange);
  border-radius: 0 var(--surface0b4bf-rSm) var(--surface0b4bf-rSm) 0;
  font-size: 12.5px;
  color: var(--surface0b4bf-text);
}

/* 10c. payment criteria list */
.surface0b4bf-pay { margin-bottom: 12px; }

.surface0b4bf-pay li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--surface0b4bf-lineSoft);
}
.surface0b4bf-pay li:last-child { border-bottom: 0; }

.surface0b4bf-payIco {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--surface0b4bf-panel3);
  border-radius: var(--surface0b4bf-rSm);
  color: var(--surface0b4bf-sky);
}
.surface0b4bf-payIco svg { width: 18px; height: 18px; }

.surface0b4bf-pay h3 {
  font-size: 13.5px;
  font-weight: 800;
  color: var(--surface0b4bf-text);
  margin: 2px 0 2px;
}

.surface0b4bf-pay p {
  font-size: 12.8px;
  color: var(--surface0b4bf-muted);
}

/* 10d. relationship map */
.surface0b4bf-rel { margin-bottom: 12px; }

.surface0b4bf-rel li {
  padding: 11px 12px;
  margin-bottom: 8px;
  background: var(--surface0b4bf-panel2);
  border: 1px solid var(--surface0b4bf-lineSoft);
  border-radius: var(--surface0b4bf-rMd);
}

.surface0b4bf-relPair {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 4px;
}

.surface0b4bf-relPair span {
  padding: 2px 8px;
  font-size: 11.5px;
  font-weight: 700;
  border-radius: 3px;
}
.surface0b4bf-relFrom { background: rgba(30, 144, 255, 0.16); color: var(--surface0b4bf-sky); }
.surface0b4bf-relTo   { background: rgba(255, 140, 0, 0.16); color: var(--surface0b4bf-orangeHi); }

.surface0b4bf-relArrow {
  width: 16px;
  height: 16px;
  color: var(--surface0b4bf-muted);
}

.surface0b4bf-rel p {
  font-size: 12.8px;
  color: var(--surface0b4bf-muted);
}

/* 10e. takeaway checklist */
.surface0b4bf-take { margin-bottom: 14px; }

.surface0b4bf-take li {
  position: relative;
  padding: 8px 0 8px 28px;
  font-size: 13.2px;
  color: var(--surface0b4bf-text);
  border-bottom: 1px dashed var(--surface0b4bf-lineSoft);
}
.surface0b4bf-take li:last-child { border-bottom: 0; }
.surface0b4bf-take li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 13px;
  width: 10px;
  height: 10px;
  border: 2px solid var(--surface0b4bf-orange);
  border-radius: 2px;
}

/* ---------------------------------------------------------------
   11. Extended footer (brand > promos > directory > disclaimer)
   --------------------------------------------------------------- */
.surface0b4bf-xfoot {
  margin: 26px 14px 0;
  padding: 18px 15px;
  background: var(--surface0b4bf-panel);
  border: 1px solid var(--surface0b4bf-lineSoft);
  border-radius: var(--surface0b4bf-rLg);
}

.surface0b4bf-brandCard {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--surface0b4bf-lineSoft);
}

.surface0b4bf-brandCard img {
  width: 44px;
  height: 44px;
  border-radius: var(--surface0b4bf-rMd);
  border: 1px solid var(--surface0b4bf-line);
  object-fit: cover;
  flex: none;
}

.surface0b4bf-brandCard strong {
  display: block;
  font-size: 16px;
  font-weight: 800;
  color: var(--surface0b4bf-butter);
  margin-bottom: 2px;
}

.surface0b4bf-brandCard p {
  font-size: 12.5px;
  color: var(--surface0b4bf-muted);
}

.surface0b4bf-xfootLabel {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--surface0b4bf-orange);
  margin: 16px 0 8px;
}

.surface0b4bf-promoGrid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.surface0b4bf-promoGrid button {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 48px;
  padding: 8px 11px;
  background: var(--surface0b4bf-panel2);
  border: 1px solid var(--surface0b4bf-line);
  border-radius: var(--surface0b4bf-rMd);
  color: var(--surface0b4bf-text);
  font-size: 12.5px;
  font-weight: 700;
  text-align: left;
  transition: transform 0.12s ease, border-color 0.12s ease;
}
.surface0b4bf-promoGrid button:active {
  transform: scale(0.96);
  border-color: var(--surface0b4bf-orange);
}
.surface0b4bf-promoGrid svg {
  width: 19px;
  height: 19px;
  color: var(--surface0b4bf-orange);
  flex: none;
}

.surface0b4bf-directory { padding-top: 4px; }

.surface0b4bf-directory .surface0b4bf-h2 {
  font-size: 16px;
  margin-bottom: 10px;
}

.surface0b4bf-dirList {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
}

@media (min-width: 375px) {
  .surface0b4bf-dirList { grid-template-columns: repeat(2, 1fr); }
}

.surface0b4bf-dirList a {
  display: block;
  min-height: 44px;
  padding: 8px 11px;
  background: var(--surface0b4bf-panel2);
  border: 1px solid var(--surface0b4bf-lineSoft);
  border-radius: var(--surface0b4bf-rSm);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--surface0b4bf-text);
  line-height: 1.5;
}
.surface0b4bf-dirList a:active { transform: scale(0.98); border-color: var(--surface0b4bf-blue); }
.surface0b4bf-dirList a:hover { color: var(--surface0b4bf-sky); }

.surface0b4bf-disc {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--surface0b4bf-lineSoft);
  font-size: 11.5px;
  line-height: 1.65;
  color: var(--surface0b4bf-muted);
}

/* ---------------------------------------------------------------
   12. Common footer strip
   --------------------------------------------------------------- */
.surface0b4bf-foot {
  padding: 20px 14px 8px;
  text-align: center;
}

.surface0b4bf-foot p {
  font-size: 12px;
  color: var(--surface0b4bf-muted);
}

/* ---------------------------------------------------------------
   13. Fixed bottom dock (full-bleed nav rail)
   --------------------------------------------------------------- */
.surface0b4bf-dock {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 430px;
  z-index: 65;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  background: rgba(26, 26, 30, 0.96);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--surface0b4bf-line);
  padding: 5px 2px calc(5px + env(safe-area-inset-bottom, 0px));
}

.surface0b4bf-dockItem {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  min-height: 54px;
  color: var(--surface0b4bf-muted);
  font-size: 10.5px;
  font-weight: 600;
  border-radius: var(--surface0b4bf-rSm);
  transition: transform 0.1s ease, color 0.14s ease;
}

.surface0b4bf-dockItem svg {
  width: 22px;
  height: 22px;
}

.surface0b4bf-dockItem:active { transform: scale(0.9); }   /* quick scale feedback */

/* active role = color switch */
.surface0b4bf-dockItem.is-active { color: var(--surface0b4bf-orange); }

.surface0b4bf-dockPromo { color: var(--surface0b4bf-sky); }
.surface0b4bf-dockPromo.is-active { color: var(--surface0b4bf-orange); }

/* ---------------------------------------------------------------
   14. Motion preferences + small-screen guards
   --------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .surface0b4bf-menu,
  .surface0b4bf-caroTrack,
  .surface0b4bf-card,
  .surface0b4bf-dockItem {
    transition: none;
  }
}

@media (max-width: 359px) {
  .surface0b4bf-actionRow { grid-template-columns: 1fr 1fr 44px; }
  .surface0b4bf-btnReg, .surface0b4bf-btnLog, .surface0b4bf-menuBtn { font-size: 12.5px; }
  .surface0b4bf-cmpRow { grid-template-columns: 84px 1fr; }
  .surface0b4bf-hero { padding: 18px 12px 20px; }
  .surface0b4bf-sec { padding: 22px 11px 6px; }
  .surface0b4bf-panel { margin: 20px 11px 0; }
  .surface0b4bf-xfoot { margin: 24px 11px 0; }
}

/* ---------------------------------------------------------------
   15. Help-page patterns — two distinct reading modes
   --------------------------------------------------------------- */
.surface0b4bf-helpMain {
  padding-top: calc(var(--surface0b4bf-headH) + 10px);
  padding-bottom: calc(var(--surface0b4bf-dockH) + 28px);
}

.surface0b4bf-helpMast {
  margin: 0 14px 14px;
  padding: 20px 16px 18px;
  background:
    linear-gradient(135deg, rgba(30, 144, 255, 0.2), transparent 52%),
    repeating-linear-gradient(135deg, rgba(238, 232, 170, 0.07) 0 2px, transparent 2px 11px),
    var(--surface0b4bf-panel2);
  border: 1px solid var(--surface0b4bf-line);
  border-radius: 4px 18px 4px 18px;
}

.surface0b4bf-helpMast h1,
.surface0b4bf-playMast h1 {
  color: var(--surface0b4bf-butter);
  font-size: clamp(22px, 6.5vw, 28px);
  line-height: 1.35;
  font-weight: 800;
  margin-bottom: 9px;
}

.surface0b4bf-helpMast p,
.surface0b4bf-playMast p { color: var(--surface0b4bf-text); font-size: 13.5px; }

.surface0b4bf-helpFlag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 8px;
  color: var(--surface0b4bf-orangeHi);
  border-left: 3px solid var(--surface0b4bf-orange);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.surface0b4bf-helpCta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  margin-top: 14px;
  padding: 8px 15px;
  background: var(--surface0b4bf-orange);
  color: #1E1E1E;
  border-radius: 3px;
  font-weight: 800;
  font-size: 13px;
}
.surface0b4bf-helpCta:active { transform: scale(0.96); }

.surface0b4bf-signal {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 7px;
  margin: 14px 14px 0;
}
.surface0b4bf-signal li {
  min-height: 62px;
  padding: 8px 6px;
  background: var(--surface0b4bf-panel);
  border-top: 2px solid var(--surface0b4bf-blue);
  border-radius: 0 var(--surface0b4bf-rSm) var(--surface0b4bf-rSm) 0;
  text-align: center;
}
.surface0b4bf-signal strong { display: block; color: var(--surface0b4bf-butter); font-size: 14px; }
.surface0b4bf-signal span { display: block; color: var(--surface0b4bf-muted); font-size: 10.5px; line-height: 1.35; }

.surface0b4bf-featureBoard {
  margin: 16px 14px 0;
  border: 1px solid var(--surface0b4bf-line);
  border-radius: var(--surface0b4bf-rMd);
  overflow: hidden;
  background: var(--surface0b4bf-panel);
}
.surface0b4bf-featureLine {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 10px;
  padding: 12px 11px;
  border-bottom: 1px solid var(--surface0b4bf-lineSoft);
}
.surface0b4bf-featureLine:last-child { border-bottom: 0; }
.surface0b4bf-featureLine b { color: var(--surface0b4bf-orangeHi); font-size: 12px; }
.surface0b4bf-featureLine span { color: var(--surface0b4bf-text); font-size: 12.5px; line-height: 1.55; }

.surface0b4bf-branchRail { margin: 14px 14px 0; }
.surface0b4bf-branchRail li {
  position: relative;
  padding: 12px 12px 12px 42px;
  background: var(--surface0b4bf-panel2);
  border-left: 2px solid var(--surface0b4bf-orange);
  margin-bottom: 8px;
  border-radius: 0 var(--surface0b4bf-rMd) var(--surface0b4bf-rMd) 0;
}
.surface0b4bf-branchRail li::before {
  content: "?";
  position: absolute;
  left: 11px;
  top: 13px;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  background: var(--surface0b4bf-blue);
  color: #101012;
  border-radius: 50%;
  font-weight: 800;
}
.surface0b4bf-branchRail h3,
.surface0b4bf-mistakes h3,
.surface0b4bf-browserLane h3,
.surface0b4bf-choice h3 { color: var(--surface0b4bf-text); font-size: 13.5px; margin-bottom: 3px; }
.surface0b4bf-branchRail p,
.surface0b4bf-mistakes p,
.surface0b4bf-browserLane p,
.surface0b4bf-choice p { color: var(--surface0b4bf-muted); font-size: 12.5px; line-height: 1.6; }

.surface0b4bf-mistakes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin: 14px 14px 0;
}
.surface0b4bf-mistakes article {
  padding: 11px 10px;
  background: rgba(255, 140, 0, 0.08);
  border: 1px solid rgba(255, 140, 0, 0.28);
  border-radius: var(--surface0b4bf-rSm);
}
.surface0b4bf-mistakes h3 { color: var(--surface0b4bf-orangeHi); font-size: 12.5px; }
.surface0b4bf-mistakes p { font-size: 11.8px; }

.surface0b4bf-checkDeck {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin: 14px 14px 0;
}
.surface0b4bf-checkItem {
  min-height: 84px;
  padding: 11px 10px 10px 31px;
  position: relative;
  background: var(--surface0b4bf-panel2);
  border: 1px solid var(--surface0b4bf-lineSoft);
  border-radius: var(--surface0b4bf-rMd);
}
.surface0b4bf-checkItem::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 13px;
  width: 11px;
  height: 11px;
  border: 2px solid var(--surface0b4bf-orange);
  border-radius: 2px;
}
.surface0b4bf-checkItem strong { display: block; color: var(--surface0b4bf-text); font-size: 12.2px; margin-bottom: 3px; }
.surface0b4bf-checkItem span { color: var(--surface0b4bf-muted); font-size: 11.5px; line-height: 1.45; }

.surface0b4bf-browserLane { margin: 14px 14px 0; }
.surface0b4bf-browserLane article {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 11px;
  align-items: start;
  padding: 12px 0;
  border-bottom: 1px dashed var(--surface0b4bf-lineSoft);
}
.surface0b4bf-browserLane article:last-child { border-bottom: 0; }
.surface0b4bf-browserIcon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  background: var(--surface0b4bf-panel3);
  color: var(--surface0b4bf-sky);
  border-radius: 50%;
  font-weight: 800;
  font-size: 12px;
}

.surface0b4bf-choiceGrid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin: 14px 14px 0;
}
.surface0b4bf-choice {
  padding: 12px 13px;
  background: linear-gradient(90deg, var(--surface0b4bf-panel2), var(--surface0b4bf-panel));
  border-right: 3px solid var(--surface0b4bf-blue);
  border-radius: var(--surface0b4bf-rMd) 0 0 var(--surface0b4bf-rMd);
}
.surface0b4bf-choice h3 { color: var(--surface0b4bf-sky); }

.surface0b4bf-requirements {
  margin: 14px 14px 0;
  padding: 13px;
  background: var(--surface0b4bf-panel);
  border: 1px solid var(--surface0b4bf-line);
  border-radius: 4px 4px 16px 4px;
}
.surface0b4bf-requirements p { color: var(--surface0b4bf-text); font-size: 12.8px; line-height: 1.7; margin-bottom: 8px; }
.surface0b4bf-requirements p:last-child { margin-bottom: 0; }

/* The how-to page uses a horizontal route and boundary notes. */
.surface0b4bf-playMast {
  margin: 0 14px 16px;
  padding: 19px 16px;
  background: radial-gradient(circle at 90% 10%, rgba(255, 140, 0, 0.28), transparent 44%), var(--surface0b4bf-panel2);
  border-bottom: 3px solid var(--surface0b4bf-orange);
  border-radius: 16px 4px 16px 4px;
}
.surface0b4bf-route {
  position: relative;
  margin: 14px 14px 0;
  padding-left: 17px;
  border-left: 2px solid var(--surface0b4bf-blue);
}
.surface0b4bf-routeStep {
  position: relative;
  margin-bottom: 12px;
  padding: 13px 12px 12px 17px;
  background: var(--surface0b4bf-panel);
  border-radius: 3px var(--surface0b4bf-rMd) var(--surface0b4bf-rMd) 3px;
}
.surface0b4bf-routeStep:last-child { margin-bottom: 0; }
.surface0b4bf-routeStep::before {
  content: attr(data-step);
  position: absolute;
  left: -34px;
  top: 13px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  background: var(--surface0b4bf-orange);
  color: #1E1E1E;
  border-radius: 3px;
  font-weight: 800;
}
.surface0b4bf-routeStep h3 { color: var(--surface0b4bf-butter); font-size: 14px; margin-bottom: 3px; }
.surface0b4bf-routeStep p { color: var(--surface0b4bf-muted); font-size: 12.7px; line-height: 1.65; }

.surface0b4bf-gate {
  margin: 14px 14px 0;
  padding: 13px;
  background: rgba(30, 144, 255, 0.1);
  border: 1px solid rgba(30, 144, 255, 0.35);
  border-radius: var(--surface0b4bf-rLg);
}
.surface0b4bf-gate strong { display: block; color: var(--surface0b4bf-sky); font-size: 13.5px; margin-bottom: 4px; }
.surface0b4bf-gate p { color: var(--surface0b4bf-text); font-size: 12.5px; line-height: 1.65; }

.surface0b4bf-boundaryGrid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin: 14px 14px 0;
}
.surface0b4bf-boundary {
  min-height: 120px;
  padding: 12px 10px;
  background: var(--surface0b4bf-panel2);
  border-top: 3px solid var(--surface0b4bf-orange);
  border-radius: var(--surface0b4bf-rSm);
}
.surface0b4bf-boundary strong { display: block; color: var(--surface0b4bf-orangeHi); font-size: 12.5px; margin-bottom: 4px; }
.surface0b4bf-boundary p { color: var(--surface0b4bf-muted); font-size: 11.8px; line-height: 1.55; }

.surface0b4bf-factGrid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin: 14px 14px 0;
}
.surface0b4bf-fact {
  padding: 11px 10px;
  background: var(--surface0b4bf-panel);
  border-left: 3px solid var(--surface0b4bf-blue);
  border-radius: 0 var(--surface0b4bf-rSm) var(--surface0b4bf-rSm) 0;
}
.surface0b4bf-fact b { display: block; color: var(--surface0b4bf-butter); font-size: 12.5px; margin-bottom: 3px; }
.surface0b4bf-fact span { color: var(--surface0b4bf-muted); font-size: 11.7px; line-height: 1.5; }

.surface0b4bf-entityFlow { margin: 14px 14px 0; }
.surface0b4bf-entityFlow li {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 10px 0;
  border-bottom: 1px dashed var(--surface0b4bf-lineSoft);
}
.surface0b4bf-entityFlow li:last-child { border-bottom: 0; }
.surface0b4bf-entityFlow b { padding: 4px 8px; background: var(--surface0b4bf-panel3); color: var(--surface0b4bf-sky); border-radius: 3px; font-size: 11.5px; }
.surface0b4bf-entityFlow i { color: var(--surface0b4bf-orange); font-style: normal; font-weight: 800; }
.surface0b4bf-entityFlow span { flex: 1 1 100%; color: var(--surface0b4bf-muted); font-size: 12px; line-height: 1.55; }

.surface0b4bf-helpActions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin: 14px 14px 0;
}
.surface0b4bf-helpAction {
  min-height: 62px;
  padding: 9px 8px;
  background: var(--surface0b4bf-panel2);
  border: 1px solid var(--surface0b4bf-line);
  border-radius: var(--surface0b4bf-rMd);
  color: var(--surface0b4bf-text);
  font-size: 11.8px;
  font-weight: 700;
  text-align: left;
}
.surface0b4bf-helpAction:active { transform: scale(0.96); border-color: var(--surface0b4bf-orange); }

@media (max-width: 359px) {
  .surface0b4bf-helpMast, .surface0b4bf-playMast { margin-left: 11px; margin-right: 11px; }
  .surface0b4bf-signal, .surface0b4bf-featureBoard, .surface0b4bf-branchRail,
  .surface0b4bf-mistakes, .surface0b4bf-checkDeck, .surface0b4bf-browserLane,
  .surface0b4bf-choiceGrid, .surface0b4bf-requirements, .surface0b4bf-route,
  .surface0b4bf-gate, .surface0b4bf-boundaryGrid, .surface0b4bf-factGrid,
  .surface0b4bf-entityFlow, .surface0b4bf-helpActions { margin-left: 11px; margin-right: 11px; }
  .surface0b4bf-featureLine { grid-template-columns: 74px 1fr; gap: 8px; }
}