:root {
  --bg: #060d1f;
  --blue: #2f6bff;
  --blue-d: #1a4de8;
  --text: #f3f6ff;
  --mute: #8b9bb8;
  --line: rgba(255, 255, 255, 0.1);
  --card: #fff;
  --ink: #111827;
  --safe: max(12px, env(safe-area-inset-bottom));
  --font: 'Manrope', system-ui, sans-serif;
  --disp: 'Montserrat', sans-serif;
}

* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
}
body {
  padding: 14px 14px calc(86px + var(--safe));
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 380px at 50% 110%, rgba(47, 107, 255, 0.5), transparent 60%),
    linear-gradient(180deg, #040814, #0b1838 55%, #1236a3);
}

.app {
  width: min(430px, 100%);
  margin: 0 auto;
}

.top {
  margin-bottom: 14px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.logo img {
  width: 28px;
  height: 26px;
}
.logo strong {
  display: block;
  font-family: var(--disp);
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1;
}
.logo span {
  display: block;
  margin-top: 3px;
  font-family: var(--disp);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  color: #7f90b0;
}
.sub {
  margin: 0;
  color: var(--mute);
  font-size: 0.88rem;
  line-height: 1.4;
}

.toast {
  background: rgba(255, 90, 80, 0.12);
  border: 1px solid rgba(255, 90, 80, 0.35);
  border-radius: 12px;
  padding: 10px 12px;
  margin-bottom: 10px;
}
.toast p {
  margin: 0;
  color: #ffc4be;
  font-size: 0.85rem;
}

.steps {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
  margin-bottom: 6px;
}
.steps i {
  width: 28px;
  height: 1px;
  background: var(--line);
}
.step {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--mute);
  font-family: var(--disp);
  font-weight: 800;
  font-size: 0.8rem;
  pointer-events: none;
}
.step.is-on,
.step.is-done {
  border: 0;
  color: #fff;
  background: linear-gradient(180deg, #4d84ff, var(--blue-d));
  box-shadow: 0 0 16px rgba(47, 107, 255, 0.45);
}
.step-caption {
  text-align: center;
  margin: 0 0 12px;
  font-family: var(--disp);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mute);
}

.screen {
  display: none;
}
.screen.is-on {
  display: block;
}

.card {
  background: var(--card);
  color: var(--ink);
  border-radius: 18px;
  padding: 14px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
}
.card.dark {
  background: rgba(10, 18, 40, 0.85);
  border: 1px solid var(--line);
  color: var(--text);
  backdrop-filter: blur(10px);
}

.seg {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-bottom: 10px;
}
.seg-btn {
  border: 0;
  border-radius: 10px;
  padding: 10px;
  font-family: var(--disp);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: #e8eef8;
  color: #607089;
}
.seg-btn.is-on {
  background: #0e1c3d;
  color: #fff;
}

.scroll {
  max-height: min(48vh, 420px);
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  padding-right: 2px;
}
.scroll h2 {
  margin: 0 0 8px;
  font-family: var(--disp);
  font-size: 1rem;
}
.scroll h3 {
  margin: 12px 0 4px;
  font-family: var(--disp);
  font-size: 0.86rem;
}
.scroll p {
  margin: 0 0 8px;
  color: #445066;
  font-size: 0.86rem;
  line-height: 1.5;
}

.form label,
.light {
  display: grid;
  gap: 5px;
  margin-bottom: 10px;
  font-family: var(--disp);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #6a7892;
}
.card.dark .light {
  color: var(--mute);
}
input {
  width: 100%;
  border: 1px solid #d7dee8;
  border-radius: 11px;
  padding: 11px 12px;
  font: 600 0.95rem/1.2 var(--font);
  color: var(--ink);
  background: #fff;
}
.card.dark input:not([type='checkbox']) {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--line);
  color: var(--text);
}
input:focus {
  outline: 2px solid rgba(47, 107, 255, 0.35);
  border-color: var(--blue);
}
.grid2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.sum {
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: 12px;
}
.sum strong {
  font-family: var(--disp);
  font-size: 1rem;
}
.sum .tg {
  color: var(--mute);
  font-size: 0.84rem;
}
.chk {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 10px;
  align-items: start;
  margin-bottom: 10px;
  font-size: 0.9rem;
  color: var(--text);
  text-transform: none;
  letter-spacing: 0;
  font-family: var(--font);
  font-weight: 500;
}
.chk input {
  width: 18px;
  height: 18px;
  margin-top: 1px;
  accent-color: var(--blue);
}

.bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  gap: 8px;
  justify-content: center;
  padding: 12px 14px calc(12px + var(--safe));
  background: linear-gradient(180deg, transparent, rgba(4, 8, 20, 0.96) 30%);
}
.bar .btn.primary {
  width: min(430px, calc(100% - 112px));
}
.bar .btn.ghost[hidden] + .btn.primary {
  width: min(430px, 100%);
}

.btn {
  border: 0;
  border-radius: 14px;
  padding: 14px 16px;
  font-family: var(--disp);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.btn.primary {
  background: linear-gradient(180deg, #4d84ff, var(--blue-d));
  color: #fff;
  box-shadow: 0 8px 24px rgba(26, 77, 232, 0.4);
}
.btn.ghost {
  min-width: 96px;
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
  border: 1px solid var(--line);
}
.btn:disabled {
  opacity: 0.5;
}

.done {
  text-align: center;
  padding-top: 18px;
}
.done-ico {
  filter: brightness(0);
  margin-bottom: 8px;
}
.done h2 {
  margin: 0 0 4px;
  font-family: var(--disp);
  font-weight: 800;
}
.done > p {
  margin: 0 0 12px;
  color: #66758f;
}
.proof {
  text-align: left;
  background: #0a1633;
  color: #e8eeff;
  border-radius: 14px;
  padding: 12px;
  margin-bottom: 12px;
}
.proof div {
  display: grid;
  grid-template-columns: 78px 1fr;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 0.8rem;
}
.proof b {
  color: #8fa0c0;
  font-weight: 600;
}
.proof code {
  word-break: break-all;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.74rem;
}
#proofHash {
  color: #7dffb2;
}
.proof .btn {
  width: 100%;
  margin-top: 4px;
}
.row-btns {
  display: flex;
  gap: 8px;
}
.row-btns .btn.primary {
  flex: 1;
}
.row-btns .btn.ghost {
  color: var(--ink);
  background: #e8eef8;
  border-color: transparent;
}

@media (max-width: 380px) {
  .grid2 {
    grid-template-columns: 1fr;
  }
}