/* SplitBill — лендинг. Палитра и шрифты — как в Mini App и на обложке. */
:root {
  --ink: #060608;
  --graphite: #111114;
  --graphite-2: #18181c;
  --line: rgb(255 255 255 / 8%);
  --dash: rgb(255 255 255 / 18%);
  --text: #f4f4f6;
  --ash: #9c9ca2;
  --faint: #5d5d66;
  --magenta: #e830f8;
  --magenta-ink: #0b0b0d;
  --glow: rgb(232 48 248 / 35%);

  --display: "Unbounded", "Manrope", system-ui, sans-serif;
  --body: "Manrope", system-ui, -apple-system, "Segoe UI", sans-serif;
  --page: min(1120px, 100% - 40px);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--ink);
  scroll-behavior: smooth;
  overflow-x: clip; /* декоративные штрихи не должны раздвигать страницу на телефоне */
}

body {
  margin: 0;
  color: var(--text);
  font-family: var(--body);
  font-size: 17px;
  font-weight: 500;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: clip;
}

/* Диагональные пурпурные штрихи по углам — как на обложке */
body::before,
body::after {
  content: "";
  position: absolute;
  width: 2px;
  height: 340px;
  background: linear-gradient(to bottom, transparent, var(--magenta) 50%, transparent);
  box-shadow: 0 0 22px 2px var(--glow);
  transform: rotate(38deg);
  opacity: 0.6;
  pointer-events: none;
}
body::before {
  top: -60px;
  left: 6%;
}
body::after {
  top: 520px;
  right: 3%;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--magenta);
  outline-offset: 3px;
  border-radius: 6px;
}

code {
  font-family: var(--body);
  font-weight: 700;
  color: var(--text);
  background: var(--graphite-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1px 6px;
  white-space: nowrap;
}

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 20px;
  top: 12px;
  z-index: 10;
  background: var(--magenta);
  color: var(--magenta-ink);
  padding: 8px 12px;
  border-radius: 8px;
}

/* --- шапка --- */
.topbar {
  width: var(--page);
  margin: 0 auto;
  padding: 22px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.mark {
  font-family: var(--display);
  font-weight: 800;
  font-size: 24px;
  letter-spacing: -0.03em;
  text-decoration: none;
}
.mark span {
  color: var(--magenta);
  text-shadow: 0 0 14px var(--glow);
}
.mark.small {
  font-size: 18px;
}
.lang {
  display: flex;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 3px;
}
.lang button {
  border: 0;
  background: none;
  color: var(--ash);
  font: 700 13px var(--body);
  padding: 6px 10px;
  border-radius: 7px;
  cursor: pointer;
}
.lang button[aria-pressed="true"] {
  background: var(--graphite-2);
  color: var(--text);
}

/* --- кнопки --- */
.btn {
  display: inline-block;
  padding: 15px 24px;
  border-radius: 14px;
  font-weight: 800;
  text-decoration: none;
  transition: transform 0.12s;
}
.btn:active {
  transform: scale(0.98);
}
.btn.primary {
  background: var(--magenta);
  color: var(--magenta-ink);
}
.btn.ghost {
  box-shadow: inset 0 0 0 1px var(--dash);
}

/* --- первый экран --- */
.hero {
  width: var(--page);
  margin: 0 auto;
  padding: 48px 0 96px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
}
.hero h1 {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(40px, 6.2vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.035em;
  margin: 0 0 28px;
  text-wrap: balance;
}
.lead {
  font-size: 19px;
  color: var(--ash);
  max-width: 34em;
  margin: 0 0 32px;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.note {
  margin: 18px 0 0;
  font-size: 14px;
  color: var(--faint);
}

/* --- чек: зубчатый низ, пурпурная кромка слева, строки «печатаются» один раз --- */
.receipt {
  --zig: 12px;
  position: relative;
  margin: 0;
  padding: 30px 30px 44px;
  background: linear-gradient(180deg, var(--graphite-2), var(--graphite));
  border-radius: 20px 20px 0 0;
  transform: rotate(-2deg);
  -webkit-mask:
    conic-gradient(from -45deg at bottom, #0000, #000 1deg 89deg, #0000 90deg) bottom / calc(var(--zig) * 2) var(--zig) repeat-x,
    linear-gradient(#000 0 0) top / 100% calc(100% - var(--zig) + 1px) no-repeat;
  mask:
    conic-gradient(from -45deg at bottom, #0000, #000 1deg 89deg, #0000 90deg) bottom / calc(var(--zig) * 2) var(--zig) repeat-x,
    linear-gradient(#000 0 0) top / 100% calc(100% - var(--zig) + 1px) no-repeat;
}
.receipt::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, transparent, var(--magenta) 55%);
  box-shadow: 0 0 14px var(--glow);
}
.receipt::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(110% 60% at 0% 100%, rgb(232 48 248 / 16%), transparent 60%);
  pointer-events: none;
}
.receipt > * {
  position: relative;
  z-index: 1;
}
.receipt-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--display);
  font-weight: 700;
  font-size: 17px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--dash);
}
.receipt-people {
  font-family: var(--body);
  font-weight: 600;
  font-size: 14px;
  color: var(--ash);
}
.receipt-lines {
  list-style: none;
  margin: 0;
  padding: 14px 0;
}
.receipt-lines li,
.receipt-total,
.transfer {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0;
  padding: 6px 0;
}
.receipt-lines i {
  flex: 1;
  border-bottom: 1px dotted var(--faint);
  transform: translateY(-5px);
}
.receipt b,
.transfer b {
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.receipt-total {
  justify-content: space-between;
  border-top: 1px dashed var(--dash);
  padding-top: 16px;
  color: var(--ash);
}
.receipt-total b {
  color: var(--text);
}
.receipt-settle {
  margin-top: 18px;
  padding: 16px 18px;
  border-radius: 14px;
  background: rgb(232 48 248 / 9%);
  box-shadow: inset 0 0 0 1px rgb(232 48 248 / 30%);
}
.receipt-settle-title {
  margin: 0 0 6px;
  font-size: 14px;
  color: var(--ash);
}
.transfer {
  justify-content: space-between;
  font-weight: 700;
}
.transfer b {
  font-family: var(--display);
  color: var(--magenta);
}

@media (prefers-reduced-motion: no-preference) {
  .receipt-lines li,
  .receipt-total,
  .receipt-settle {
    animation: print 0.45s cubic-bezier(0.2, 0.7, 0.2, 1) both;
    animation-delay: calc(0.35s + var(--i) * 0.28s);
  }
  .receipt-settle {
    animation-name: settle;
    animation-duration: 0.6s;
  }
}
@keyframes print {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
}
@keyframes settle {
  from {
    opacity: 0;
    transform: scale(0.96);
    box-shadow: inset 0 0 0 1px rgb(232 48 248 / 30%), 0 0 0 0 var(--glow);
  }
  60% {
    box-shadow: inset 0 0 0 1px rgb(232 48 248 / 60%), 0 0 40px 4px var(--glow);
  }
}

/* --- разделы --- */
main > section:not(.hero) {
  width: var(--page);
  margin: 0 auto;
  padding: 72px 0;
  border-top: 1px solid var(--line);
}
h2 {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(28px, 3.6vw, 40px);
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin: 0 0 40px;
}
h3 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 19px;
  margin: 22px 0 8px;
}

/* --- как это работает --- */
.steps {
  list-style: none;
  counter-reset: step;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.steps li {
  counter-increment: step;
}
.steps h3::before {
  content: counter(step);
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  margin-right: 10px;
  border-radius: 50%;
  background: var(--magenta);
  color: var(--magenta-ink);
  font-size: 14px;
  vertical-align: 2px;
}
.steps p {
  margin: 0;
  color: var(--ash);
  max-width: 30em;
}
.phone {
  aspect-ratio: 390 / 844;
  max-width: 300px;
  border-radius: 34px;
  padding: 8px;
  background: #1a1a1f;
  box-shadow:
    inset 0 0 0 1px rgb(255 255 255 / 10%),
    0 30px 60px -30px rgb(0 0 0 / 80%);
}
.phone img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  border-radius: 27px;
}

/* --- возможности: строки чека, а не карточки --- */
.feature-list {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  column-gap: 64px;
}
.feature-list div {
  padding: 22px 0;
  border-bottom: 1px dashed var(--dash);
}
.feature-list dt {
  font-weight: 800;
  font-size: 18px;
  margin-bottom: 4px;
}
.feature-list dd {
  margin: 0;
  color: var(--ash);
  max-width: 34em;
}

/* --- вопросы --- */
.faq details {
  max-width: 760px;
  border-bottom: 1px dashed var(--dash);
}
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 40px 20px 0;
  font-weight: 700;
  font-size: 18px;
  position: relative;
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 14px;
  font-family: var(--display);
  font-size: 24px;
  color: var(--magenta);
  transition: transform 0.2s;
}
.faq details[open] summary::after {
  transform: rotate(45deg);
}
.faq details p {
  margin: 0 0 22px;
  color: var(--ash);
  max-width: 40em;
}
.faq a {
  color: var(--text);
  text-decoration-color: var(--magenta);
  text-underline-offset: 3px;
}

/* --- финальный призыв --- */
.final {
  text-align: center;
}
.final-title {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 38px);
  letter-spacing: -0.02em;
  line-height: 1.15;
  max-width: 18em;
  margin: 0 auto 32px;
  text-wrap: balance;
}

/* --- подвал --- */
.footer {
  width: var(--page);
  margin: 0 auto;
  padding: 32px 0 48px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 32px;
  color: var(--ash);
  font-size: 15px;
}
.footer nav {
  display: flex;
  gap: 24px;
  flex: 1;
}
.footer nav a {
  text-decoration: none;
}
.footer nav a:hover {
  color: var(--text);
}
.copy {
  margin: 0;
  color: var(--faint);
}

/* --- политика конфиденциальности --- */
.doc {
  width: min(720px, 100% - 40px);
  margin: 0 auto;
  padding: 32px 0 80px;
}
.doc h1 {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(30px, 5vw, 44px);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin: 0 0 8px;
}
.doc h2 {
  font-size: 22px;
  margin: 44px 0 12px;
}
.doc p,
.doc li {
  color: var(--ash);
}
.doc strong {
  color: var(--text);
}
.doc .updated {
  color: var(--faint);
  font-size: 15px;
  margin-bottom: 32px;
}
.doc [data-lang-block] {
  display: none;
}
html[lang="ru"] .doc [data-lang-block="ru"],
html[lang="en"] .doc [data-lang-block="en"] {
  display: block;
}

/* --- мобильные --- */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 48px;
    padding-bottom: 72px;
  }
  .receipt {
    transform: none;
  }
  .steps {
    grid-template-columns: none;
    grid-auto-flow: column;
    grid-auto-columns: 78%;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: 8px;
    gap: 24px;
  }
  .steps li {
    scroll-snap-align: start;
  }
  .feature-list {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 480px) {
  body {
    font-size: 16px;
  }
  .receipt {
    padding: 24px 20px 40px;
  }
  .btn {
    flex: 1;
    text-align: center;
  }
}