:root {
  --bt-pink: #fb359c;
  --bt-pink-deep: #db197c;
  --bt-pink-soft: #ffe3f1;
  --bt-pink-mist: #fff7fb;
  --bt-yellow: #ffed66;
  --bt-ink: #181217;
  --bt-muted: #70646c;
  --bt-line: #eadde5;
  --bt-white: #fff;
  --bt-shadow: 0 24px 70px rgba(98, 23, 66, 0.14);
  --bt-shell: min(1180px, calc(100% - 40px));
  --bt-radius: 28px;
  --bt-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei",
    "Noto Sans SC", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  color: var(--bt-ink);
  background: var(--bt-pink-mist);
  font-family: var(--bt-font);
  -webkit-font-smoothing: antialiased;
}

body::selection {
  color: var(--bt-white);
  background: var(--bt-pink);
}

a {
  color: inherit;
  text-decoration: none;
}

button,
a,
summary {
  -webkit-tap-highlight-color: transparent;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--bt-yellow);
  outline-offset: 4px;
}

figure {
  margin: 0;
}

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

.app-screen img {
  width: 100%;
  height: auto;
  object-fit: contain;
}

.bt-shell {
  width: var(--bt-shell);
  margin-inline: auto;
}

.bt-section {
  padding: 92px 0;
}

.bt-header {
  position: fixed;
  z-index: 100;
  inset: 0 0 auto;
  height: 72px;
  border-bottom: 1px solid transparent;
  transition: background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.bt-header.is-scrolled {
  border-color: rgba(24, 18, 23, 0.08);
  background: rgba(255, 248, 252, 0.88);
  box-shadow: 0 8px 30px rgba(50, 20, 37, 0.06);
  backdrop-filter: blur(18px);
}

.bt-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.bt-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0;
  border: 0;
  color: inherit;
  background: transparent;
  font: inherit;
  font-size: 17px;
  font-weight: 900;
  letter-spacing: -0.03em;
  cursor: pointer;
}

.bt-brand img {
  border-radius: 13px;
  box-shadow: 0 8px 20px rgba(251, 53, 156, 0.25);
}

.bt-nav-links {
  display: none;
  align-items: center;
  gap: 32px;
  color: #4e424a;
  font-size: 14px;
  font-weight: 700;
}

.bt-nav-links a,
.bt-nav-links button {
  position: relative;
}

.bt-nav-links button {
  padding: 0;
  border: 0;
  color: inherit;
  background: transparent;
  font: inherit;
  cursor: pointer;
}

.bt-nav-links a::after,
.bt-nav-links button::after {
  position: absolute;
  right: 0;
  bottom: -8px;
  left: 0;
  height: 3px;
  border-radius: 999px;
  background: var(--bt-pink);
  content: "";
  transform: scaleX(0);
  transition: transform 0.2s ease;
}

.bt-nav-links a:hover::after,
.bt-nav-links button:hover::after,
.bt-nav-links a[aria-current="true"]::after,
.bt-nav-links button[aria-current="page"]::after {
  transform: scaleX(1);
}

.bt-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 50px;
  padding: 0 24px;
  border: 2px solid var(--bt-ink);
  border-radius: 14px;
  color: var(--bt-ink);
  background: var(--bt-white);
  box-shadow: 4px 4px 0 var(--bt-ink);
  font-family: inherit;
  font-size: 15px;
  font-weight: 900;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.bt-button:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--bt-ink);
}

.bt-button--small {
  min-height: 42px;
  padding-inline: 18px;
  border-width: 1.5px;
  border-radius: 12px;
  box-shadow: 3px 3px 0 var(--bt-ink);
  font-size: 14px;
}

.bt-button--primary {
  border-color: var(--bt-ink);
  color: var(--bt-white);
  background: var(--bt-pink);
}

.bt-button--light {
  width: 100%;
  border-color: var(--bt-ink);
  color: var(--bt-ink);
  background: var(--bt-yellow);
}

.bt-hero {
  position: relative;
  overflow: hidden;
  padding: 118px 0 0;
  background:
    radial-gradient(circle at 8% 22%, rgba(251, 53, 156, 0.12) 0 4px, transparent 5px),
    radial-gradient(circle at 92% 14%, rgba(255, 237, 102, 0.9) 0 7px, transparent 8px),
    linear-gradient(145deg, #fff8fc 0%, #ffe6f2 100%);
}

.bt-hero::before,
.bt-hero::after {
  position: absolute;
  border: 2px solid rgba(251, 53, 156, 0.18);
  border-radius: 50%;
  content: "";
}

.bt-hero::before {
  top: 128px;
  left: -86px;
  width: 180px;
  height: 180px;
}

.bt-hero::after {
  right: -120px;
  bottom: 95px;
  width: 280px;
  height: 280px;
}

.bt-hero-spark {
  position: absolute;
  top: 110px;
  left: 53%;
  width: 90px;
  height: 90px;
  opacity: 0.55;
  background: repeating-conic-gradient(from 0deg, var(--bt-pink) 0 2deg, transparent 2deg 16deg);
  -webkit-mask: radial-gradient(circle, transparent 0 35%, #000 36% 60%, transparent 61%);
  mask: radial-gradient(circle, transparent 0 35%, #000 36% 60%, transparent 61%);
}

.bt-hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 56px;
  align-items: center;
  min-height: 720px;
  padding-bottom: 76px;
}

.bt-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 24px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.bt-kicker span {
  display: inline-block;
  padding: 7px 10px;
  border-radius: 999px;
  color: var(--bt-white);
  background: var(--bt-ink);
  letter-spacing: 0;
}

.bt-hero h1,
.bt-heading h2,
.bt-intro h2,
.bt-ticket h2,
.bt-faq h2 {
  margin: 0;
  font-size: clamp(44px, 11vw, 82px);
  line-height: 0.98;
  letter-spacing: -0.07em;
}

.bt-hero h1 em,
.bt-heading h2 em {
  color: var(--bt-pink);
  font-style: normal;
}

.bt-hero-slogan {
  margin: 16px 0 0;
  color: var(--bt-pink);
  font-size: clamp(25px, 5vw, 38px);
  font-weight: 950;
  line-height: 1.15;
  letter-spacing: -0.04em;
}

.bt-hero-lead {
  max-width: 590px;
  margin: 26px 0 0;
  color: #5d5058;
  font-size: 17px;
  line-height: 1.85;
}

.bt-hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  margin-top: 34px;
}

.bt-text-link {
  border-bottom: 2px solid var(--bt-ink);
  font-size: 14px;
  font-weight: 800;
}

.bt-hero-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: 530px;
  margin: 44px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid rgba(24, 18, 23, 0.13);
  list-style: none;
}

.bt-hero-meta li {
  display: grid;
  gap: 5px;
  padding-right: 10px;
}

.bt-hero-meta strong {
  font-size: 17px;
}

.bt-hero-meta span {
  color: var(--bt-muted);
  font-size: 11px;
}

.bt-hero-art {
  position: relative;
  width: min(100%, 480px);
  min-height: 570px;
  margin-inline: auto;
}

.bt-hero-art::before {
  position: absolute;
  inset: 44px 0 0;
  border: 2px solid var(--bt-ink);
  border-radius: 48% 52% 45% 55% / 45% 42% 58% 55%;
  background: var(--bt-pink);
  box-shadow: 14px 14px 0 var(--bt-yellow);
  content: "";
  transform: rotate(-5deg);
}

.bt-phone {
  position: relative;
  z-index: 2;
  width: min(76vw, 324px);
  padding: 12px;
  border: 3px solid var(--bt-ink);
  border-radius: 34px;
  background: var(--bt-white);
  box-shadow: var(--bt-shadow);
}

.bt-phone--hero {
  margin: 0 auto;
  transform: rotate(5deg);
}

.bt-phone img {
  border-radius: 22px;
}

.bt-phone-speaker {
  position: absolute;
  z-index: 3;
  top: 18px;
  left: 50%;
  width: 58px;
  height: 7px;
  border-radius: 999px;
  background: var(--bt-ink);
  transform: translateX(-50%);
}

.bt-float-note {
  position: absolute;
  z-index: 5;
  display: grid;
  gap: 3px;
  padding: 13px 16px;
  border: 2px solid var(--bt-ink);
  border-radius: 14px;
  color: var(--bt-ink);
  background: var(--bt-white);
  box-shadow: 5px 5px 0 var(--bt-ink);
  font-size: 11px;
}

.bt-float-note b {
  font-size: 14px;
}

.bt-float-note--top {
  top: 18px;
  right: -4px;
  transform: rotate(4deg);
}

.bt-float-note--bottom {
  right: 2px;
  bottom: 45px;
  grid-template-columns: auto 1fr;
  align-items: center;
  background: var(--bt-yellow);
  transform: rotate(-3deg);
}

.bt-float-note--bottom span:last-child {
  grid-column: 2;
}

.bt-live-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--bt-pink);
  box-shadow: 0 0 0 5px rgba(251, 53, 156, 0.18);
}

.bt-doodle {
  position: absolute;
  z-index: 4;
  color: var(--bt-white);
  font-weight: 900;
  text-shadow: 2px 2px 0 var(--bt-ink);
}

.bt-doodle--heart {
  top: 120px;
  left: 6px;
  font-size: 38px;
  transform: rotate(-12deg);
}

.bt-doodle--plus {
  right: 23px;
  bottom: 172px;
  font-size: 34px;
  transform: rotate(10deg);
}

.bt-marquee {
  position: relative;
  z-index: 4;
  overflow: hidden;
  border-block: 2px solid var(--bt-ink);
  color: var(--bt-ink);
  background: var(--bt-yellow);
  transform: rotate(-1deg) scale(1.02);
}

.bt-marquee > div {
  display: flex;
  width: max-content;
  align-items: center;
  gap: 24px;
  padding: 15px 0;
  animation: bt-marquee 24s linear infinite;
}

.bt-marquee span {
  font-size: 14px;
  font-weight: 900;
  white-space: nowrap;
}

.bt-marquee i {
  color: var(--bt-pink);
  font-style: normal;
}

@keyframes bt-marquee {
  to { transform: translateX(-50%); }
}

.bt-intro {
  background: var(--bt-white);
}

.bt-intro-grid {
  display: grid;
  gap: 30px;
}

.bt-section-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  color: var(--bt-muted);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.bt-section-label span {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 1.5px solid currentColor;
  border-radius: 50%;
  letter-spacing: 0;
}

.bt-section-label--light {
  color: rgba(255, 255, 255, 0.78);
}

.bt-intro h2,
.bt-heading h2,
.bt-faq h2 {
  font-size: clamp(38px, 8vw, 66px);
}

.bt-intro-copy {
  align-self: end;
}

.bt-intro-copy > p,
.bt-heading > p:last-child,
.bt-faq .bt-heading > p:last-child {
  margin: 0;
  color: var(--bt-muted);
  font-size: 16px;
  line-height: 1.8;
}

.bt-mini-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.bt-mini-tags span {
  padding: 8px 12px;
  border: 1px solid var(--bt-line);
  border-radius: 999px;
  background: var(--bt-pink-mist);
  font-size: 12px;
  font-weight: 800;
}

.bt-stories {
  background:
    radial-gradient(circle at 12% 12%, rgba(251, 53, 156, 0.1), transparent 28%),
    var(--bt-pink-mist);
}

.bt-heading {
  max-width: 760px;
}

.bt-heading--center {
  margin-inline: auto;
  text-align: center;
}

.bt-heading--center .bt-section-label {
  justify-content: center;
}

.bt-heading--center > p:last-child {
  margin-top: 22px;
}

.bt-story {
  display: grid;
  gap: 48px;
  align-items: center;
  padding: 100px 0;
  border-bottom: 1px solid var(--bt-line);
}

.bt-story:last-child {
  padding-bottom: 16px;
  border-bottom: 0;
}

.bt-story-visual {
  position: relative;
  display: grid;
  min-height: 640px;
  place-items: center;
  border: 2px solid var(--bt-ink);
  border-radius: 42px;
  background: var(--bt-pink-soft);
  box-shadow: 10px 10px 0 var(--bt-ink);
}

.bt-story--updates .bt-story-visual {
  background: var(--bt-yellow);
}

.bt-story--tickets .bt-story-visual {
  background: var(--bt-pink);
}

.bt-story-visual::before {
  position: absolute;
  inset: 11% 10%;
  border: 2px dashed rgba(24, 18, 23, 0.18);
  border-radius: 50%;
  content: "";
  transform: rotate(-8deg);
}

.bt-story-visual .bt-phone {
  width: min(72vw, 300px);
  transform: rotate(-3deg);
}

.bt-story--updates .bt-phone {
  transform: rotate(3deg);
}

.bt-story--tickets .bt-phone {
  transform: rotate(-2deg);
}

.bt-story-number {
  position: absolute;
  z-index: 4;
  top: 24px;
  left: 26px;
  font-size: 54px;
  font-weight: 950;
  letter-spacing: -0.08em;
  -webkit-text-stroke: 1.5px var(--bt-ink);
  color: transparent;
}

.bt-sticker {
  position: absolute;
  z-index: 5;
  right: 16px;
  bottom: 34px;
  display: grid;
  width: 92px;
  height: 92px;
  place-items: center;
  border: 2px solid var(--bt-ink);
  border-radius: 50%;
  box-shadow: 5px 5px 0 var(--bt-ink);
  font-size: 15px;
  font-weight: 950;
  line-height: 1.05;
  text-align: center;
  transform: rotate(8deg);
}

.bt-sticker--white {
  background: var(--bt-white);
}

.bt-sticker--pink {
  color: var(--bt-white);
  background: var(--bt-pink);
}

.bt-ticket-float {
  position: absolute;
  z-index: 5;
  right: 14px;
  bottom: 38px;
  display: grid;
  gap: 4px;
  padding: 16px 22px;
  border: 2px solid var(--bt-ink);
  color: var(--bt-ink);
  background: var(--bt-yellow);
  box-shadow: 5px 5px 0 var(--bt-ink);
  transform: rotate(5deg);
}

.bt-ticket-float::before,
.bt-ticket-float::after {
  position: absolute;
  top: 50%;
  width: 13px;
  height: 24px;
  background: var(--bt-pink);
  content: "";
  transform: translateY(-50%);
}

.bt-ticket-float::before {
  left: -2px;
  border-radius: 0 13px 13px 0;
}

.bt-ticket-float::after {
  right: -2px;
  border-radius: 13px 0 0 13px;
}

.bt-ticket-float small {
  font-size: 10px;
}

.bt-story-copy {
  max-width: 520px;
}

.bt-story-eyebrow {
  margin: 0 0 18px;
  color: var(--bt-pink-deep);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.bt-story-copy h3 {
  margin: 0;
  font-size: clamp(36px, 7vw, 62px);
  line-height: 1.05;
  letter-spacing: -0.06em;
}

.bt-story-copy > p:not(.bt-story-eyebrow) {
  margin: 26px 0 0;
  color: var(--bt-muted);
  font-size: 16px;
  line-height: 1.9;
}

.bt-tick-list {
  display: grid;
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.bt-tick-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 800;
}

.bt-tick-list li::before {
  display: grid;
  width: 22px;
  height: 22px;
  flex: 0 0 22px;
  place-items: center;
  border-radius: 50%;
  color: var(--bt-white);
  background: var(--bt-pink);
  content: "✓";
  font-size: 12px;
}

.bt-days {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
  margin-top: 30px;
}

.bt-days span {
  display: grid;
  aspect-ratio: 1;
  place-items: center;
  border: 1.5px solid var(--bt-ink);
  border-radius: 50%;
  background: var(--bt-white);
  font-size: 12px;
  font-weight: 900;
}

.bt-days span:nth-child(3),
.bt-days span:nth-child(6) {
  color: var(--bt-white);
  background: var(--bt-pink);
}

.bt-quote-chip {
  display: inline-block;
  margin-top: 30px;
  padding: 12px 16px;
  border: 1.5px solid var(--bt-ink);
  background: var(--bt-yellow);
  box-shadow: 4px 4px 0 var(--bt-ink);
  font-size: 12px;
  font-weight: 900;
  transform: rotate(-1deg);
}

.bt-features {
  color: var(--bt-white);
  background: var(--bt-ink);
}

.bt-features .bt-section-label,
.bt-features .bt-heading > p:last-child {
  color: rgba(255, 255, 255, 0.65);
}

.bt-flow {
  position: relative;
  display: grid;
  gap: 0;
  margin: 64px 0 0;
  padding: 0;
  list-style: none;
}

.bt-flow::before {
  position: absolute;
  top: 30px;
  bottom: 30px;
  left: 27px;
  width: 2px;
  background: linear-gradient(var(--bt-pink), var(--bt-yellow));
  content: "";
}

.bt-flow li {
  position: relative;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 8px 18px;
  padding: 20px 0;
}

.bt-flow-icon {
  z-index: 2;
  display: grid;
  grid-row: span 2;
  width: 56px;
  height: 56px;
  place-items: center;
  border: 2px solid var(--bt-white);
  border-radius: 50%;
  color: var(--bt-ink);
  background: var(--bt-yellow);
  box-shadow: 4px 4px 0 var(--bt-pink);
  font-size: 20px;
  font-weight: 950;
}

.bt-flow li:nth-child(even) .bt-flow-icon {
  color: var(--bt-white);
  background: var(--bt-pink);
  box-shadow: 4px 4px 0 var(--bt-yellow);
}

.bt-flow b {
  align-self: end;
  font-size: 18px;
}

.bt-flow p {
  margin: 0;
  color: rgba(255, 255, 255, 0.6);
  font-size: 13px;
  line-height: 1.7;
}

.bt-download {
  background: var(--bt-white);
}

.bt-ticket {
  position: relative;
  display: grid;
  gap: 48px;
  overflow: hidden;
  padding: 48px 28px;
  border: 3px solid var(--bt-ink);
  border-radius: 34px;
  color: var(--bt-white);
  background:
    radial-gradient(circle at 88% 18%, rgba(255, 237, 102, 0.34), transparent 22%),
    var(--bt-pink);
  box-shadow: 12px 12px 0 var(--bt-ink);
}

.bt-ticket::before,
.bt-ticket::after {
  position: absolute;
  top: 58%;
  width: 44px;
  height: 78px;
  border: 3px solid var(--bt-ink);
  background: var(--bt-white);
  content: "";
  transform: translateY(-50%);
}

.bt-ticket::before {
  left: -25px;
  border-radius: 0 44px 44px 0;
}

.bt-ticket::after {
  right: -25px;
  border-radius: 44px 0 0 44px;
}

.bt-ticket-copy,
.bt-platforms {
  position: relative;
  z-index: 2;
}

.bt-ticket h2 {
  font-size: clamp(44px, 10vw, 76px);
}

.bt-ticket-copy > p:not(.bt-section-label) {
  max-width: 520px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 15px;
  line-height: 1.8;
}

.bt-platforms {
  display: grid;
  gap: 14px;
  align-content: center;
}

.bt-cta-download {
  min-height: 70px;
  border-radius: 20px;
  font-size: 18px;
}

.bt-device-note {
  margin: 4px 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 11px;
  text-align: center;
}

.bt-ticket-mark {
  position: absolute;
  color: var(--bt-yellow);
  font-size: 42px;
  font-weight: 900;
}

.bt-ticket-mark--one {
  top: 28px;
  right: 36px;
  transform: rotate(14deg);
}

.bt-ticket-mark--two {
  bottom: 42px;
  left: 46%;
}

.bt-faq {
  background: var(--bt-pink-mist);
}

.bt-faq-grid {
  display: grid;
  gap: 50px;
}

.bt-faq .bt-heading > p:last-child {
  margin-top: 24px;
}

.bt-faq-list {
  border-top: 2px solid var(--bt-ink);
}

.bt-faq details {
  border-bottom: 1px solid var(--bt-line);
}

.bt-faq summary {
  position: relative;
  padding: 24px 46px 24px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 900;
}

.bt-faq summary::-webkit-details-marker {
  display: none;
}

.bt-faq summary span,
.bt-faq summary span::after {
  position: absolute;
  top: 50%;
  right: 2px;
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background: var(--bt-pink);
  content: "";
  transition: transform 0.2s ease;
}

.bt-faq summary span::after {
  top: 0;
  right: 0;
  transform: rotate(90deg);
}

.bt-faq details[open] summary span::after {
  transform: rotate(0);
}

.bt-faq details p {
  margin: -5px 0 24px;
  padding-right: 42px;
  color: var(--bt-muted);
  font-size: 14px;
  line-height: 1.8;
}

.bt-footer {
  padding: 44px 0 110px;
  color: rgba(255, 255, 255, 0.76);
  background: var(--bt-ink);
}

.bt-footer-inner {
  display: grid;
  gap: 22px;
  align-items: center;
  text-align: center;
}

.bt-footer .bt-brand {
  justify-self: center;
  color: var(--bt-white);
}

.bt-footer p {
  margin: 0;
  font-size: 12px;
}

.bt-footer-download {
  justify-self: center;
  padding: 0;
  border: 0;
  color: var(--bt-yellow);
  background: transparent;
  font-family: inherit;
  font-size: 13px;
  font-weight: 900;
  cursor: pointer;
}

.bt-download-modal {
  width: min(700px, calc(100% - 28px));
  max-width: none;
  max-height: calc(100dvh - 28px);
  padding: 0;
  border: 0;
  color: var(--bt-ink);
  background: transparent;
  overflow: visible;
}

.bt-download-modal::backdrop {
  background: rgba(24, 18, 23, 0.74);
  backdrop-filter: blur(8px);
}

.bt-download-modal[open] {
  animation: bt-modal-in 0.24s ease-out;
}

.bt-modal-card {
  position: relative;
  max-height: calc(100dvh - 28px);
  padding: 30px 22px 24px;
  border: 3px solid var(--bt-ink);
  border-radius: 28px;
  background:
    radial-gradient(circle at 92% 5%, rgba(251, 53, 156, 0.16), transparent 32%),
    var(--bt-white);
  box-shadow: 10px 10px 0 var(--bt-pink);
  overflow: auto;
}

.bt-modal-close {
  position: absolute;
  z-index: 2;
  top: 16px;
  right: 16px;
  display: grid;
  width: 40px;
  height: 40px;
  padding: 0;
  place-items: center;
  border: 2px solid var(--bt-ink);
  border-radius: 50%;
  color: var(--bt-ink);
  background: var(--bt-yellow);
  box-shadow: 3px 3px 0 var(--bt-ink);
  font-family: inherit;
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
}

.bt-modal-heading {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-right: 52px;
}

.bt-modal-heading img {
  flex: 0 0 64px;
  border-radius: 17px;
  box-shadow: 5px 5px 0 var(--bt-ink);
}

.bt-modal-heading p {
  margin: 0 0 4px;
  color: var(--bt-pink-deep);
  font-size: 10px;
  font-weight: 950;
  letter-spacing: 0.14em;
}

.bt-modal-heading h2 {
  margin: 0;
  font-size: clamp(28px, 7vw, 42px);
  line-height: 1.05;
  letter-spacing: -0.05em;
}

.bt-modal-intro {
  margin: 24px 0 0;
  color: var(--bt-muted);
  font-size: 14px;
  line-height: 1.7;
}

.bt-modal-options {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.bt-modal-option {
  display: grid;
  gap: 7px;
  padding: 20px;
  border: 2px solid var(--bt-ink);
  border-radius: 20px;
  background: var(--bt-pink-mist);
  box-shadow: 5px 5px 0 var(--bt-ink);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.bt-modal-option--ios {
  background: var(--bt-yellow);
}

.bt-modal-option:hover {
  transform: translate(2px, 2px);
  box-shadow: 3px 3px 0 var(--bt-ink);
}

.bt-modal-platform {
  width: max-content;
  padding: 5px 8px;
  border-radius: 999px;
  color: var(--bt-white);
  background: var(--bt-pink);
  font-size: 10px;
  font-weight: 900;
}

.bt-modal-option--ios .bt-modal-platform {
  background: var(--bt-ink);
}

.bt-modal-option strong {
  margin-top: 4px;
  font-size: 20px;
}

.bt-modal-option small {
  color: var(--bt-muted);
  font-size: 12px;
}

.bt-modal-option b {
  margin-top: 10px;
  color: var(--bt-pink-deep);
  font-size: 13px;
}

.bt-modal-note {
  margin: 20px 0 0;
  color: var(--bt-muted);
  font-size: 11px;
  text-align: center;
}

.bt-modal-open {
  overflow: hidden;
}

.bt-noscript-download {
  position: fixed;
  z-index: 200;
  right: 12px;
  bottom: 12px;
  left: 12px;
  display: flex;
  justify-content: center;
  gap: 12px;
  padding: 14px;
  border-radius: 14px;
  color: var(--bt-white);
  background: var(--bt-ink);
  font-size: 13px;
  font-weight: 800;
}

.bt-noscript-download a {
  color: var(--bt-yellow);
}

@keyframes bt-modal-in {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.97);
  }
}

.bt-mobile-bar {
  position: fixed;
  z-index: 90;
  right: 10px;
  bottom: calc(10px + env(safe-area-inset-bottom));
  left: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px;
  border: 1px solid rgba(24, 18, 23, 0.12);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 15px 45px rgba(49, 19, 37, 0.22);
  backdrop-filter: blur(18px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.bt-mobile-bar.is-hidden {
  pointer-events: none;
  opacity: 0;
  transform: translateY(120%);
}

.bt-mobile-bar > div {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
}

.bt-mobile-bar img {
  flex: 0 0 42px;
  border-radius: 12px;
}

.bt-mobile-bar p {
  display: grid;
  gap: 3px;
  min-width: 0;
  margin: 0;
}

.bt-mobile-bar b {
  overflow: hidden;
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.bt-mobile-bar p span {
  color: var(--bt-muted);
  font-size: 10px;
}

.bt-mobile-bar .bt-button {
  min-height: 42px;
  flex: 0 0 auto;
  padding-inline: 16px;
  border-radius: 12px;
  box-shadow: 3px 3px 0 var(--bt-ink);
  font-size: 12px;
}

.bt-has-js .bt-reveal:not(.is-visible) {
  opacity: 0;
  transform: translateY(28px);
}

.bt-reveal {
  transition: opacity 0.65s ease, transform 0.65s cubic-bezier(0.2, 0.7, 0.2, 1);
}

@media (min-width: 720px) {
  :root {
    --bt-shell: min(1180px, calc(100% - 72px));
  }

  .bt-section {
    padding: 120px 0;
  }

  .bt-nav-links {
    display: flex;
  }

  .bt-hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(360px, 0.78fr);
    gap: 40px;
    min-height: 820px;
    padding-bottom: 92px;
  }

  .bt-hero h1 {
    font-size: clamp(58px, 7.2vw, 82px);
  }

  .bt-hero-art {
    min-height: 640px;
  }

  .bt-phone--hero {
    width: 340px;
  }

  .bt-intro-grid {
    grid-template-columns: 0.45fr 1.25fr 0.8fr;
    gap: 40px;
  }

  .bt-story {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    gap: 9vw;
    padding: 130px 0;
  }

  .bt-story-visual {
    min-height: 720px;
  }

  .bt-story-visual .bt-phone {
    width: min(28vw, 324px);
  }

  .bt-sticker {
    right: 24px;
    bottom: 44px;
    width: 112px;
    height: 112px;
  }

  .bt-ticket-float {
    right: 24px;
    bottom: 48px;
  }

  .bt-flow {
    grid-template-columns: repeat(5, 1fr);
    gap: 22px;
  }

  .bt-flow::before {
    top: 27px;
    right: 9%;
    bottom: auto;
    left: 9%;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--bt-pink), var(--bt-yellow));
  }

  .bt-flow li {
    grid-template-columns: 1fr;
    justify-items: center;
    padding: 0;
    text-align: center;
  }

  .bt-flow-icon {
    grid-row: auto;
  }

  .bt-flow b {
    margin-top: 12px;
    font-size: 16px;
  }

  .bt-flow p {
    font-size: 12px;
  }

  .bt-ticket {
    grid-template-columns: 1.08fr 0.92fr;
    gap: 72px;
    padding: 68px;
  }

  .bt-ticket::before,
  .bt-ticket::after {
    top: 50%;
  }

  .bt-faq-grid {
    grid-template-columns: 0.8fr 1.2fr;
    gap: 10vw;
  }

  .bt-footer {
    padding-bottom: 44px;
  }

  .bt-footer-inner {
    grid-template-columns: 1fr auto 1fr;
    text-align: left;
  }

  .bt-footer .bt-brand {
    justify-self: start;
  }

  .bt-footer-download {
    justify-self: end;
  }

  .bt-modal-card {
    padding: 36px;
  }

  .bt-modal-options {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .bt-mobile-bar {
    display: none;
  }
}

@media (min-width: 1080px) {
  .bt-hero-grid {
    grid-template-columns: 1.08fr 0.92fr;
  }

  .bt-hero h1 {
    font-size: 86px;
  }

  .bt-hero-art {
    width: 500px;
  }

  .bt-story-copy h3 {
    font-size: 64px;
  }

  .bt-ticket {
    padding: 78px 86px;
  }
}

@media (max-width: 420px) {
  :root {
    --bt-shell: calc(100% - 28px);
  }

  .bt-brand span {
    display: none;
  }

  .bt-hero {
    padding-top: 104px;
  }

  .bt-hero-grid {
    gap: 44px;
    min-height: auto;
  }

  .bt-kicker {
    font-size: 11px;
  }

  .bt-hero-lead {
    font-size: 15px;
  }

  .bt-hero-meta strong {
    font-size: 14px;
  }

  .bt-float-note--top {
    right: 0;
  }

  .bt-story {
    padding: 84px 0;
  }

  .bt-story-visual {
    min-height: 590px;
    border-radius: 30px;
    box-shadow: 7px 7px 0 var(--bt-ink);
  }

  .bt-story-visual .bt-phone {
    width: min(72vw, 276px);
  }

  .bt-ticket {
    padding: 42px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .bt-has-js .bt-reveal:not(.is-visible) {
    opacity: 1;
    transform: none;
  }
}