:root {
  --code-bg: #07080d;
  --code-panel: rgba(13,15,23,.86);
  --code-line: rgba(255,255,255,.12);
  --code-accent: #52beff;
  --code-gold: #f4d77c;
  --code-green: #35d07f;
  --code-red: #ff5252;
}

html, body {
  height: auto !important;
  overflow-x: hidden;
  overflow-y: auto !important;
  overscroll-behavior-y: auto;
}

body {
  min-height: 100vh;
  min-height: 100svh;
  min-height: 100dvh;
  color: #f5f6fa;
  background:
    radial-gradient(ellipse at 50% -10%, rgba(27,103,141,.45), transparent 42%),
    linear-gradient(180deg, #07080d 0%, #130d10 58%, #07080d 100%);
  padding-bottom: calc(88px + env(safe-area-inset-bottom));
}

.code-shell {
  min-height: 100vh;
  min-height: 100svh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  width: min(980px, 100%);
  margin: 0 auto;
  padding: 14px 14px calc(92px + env(safe-area-inset-bottom));
  gap: 14px;
}

.code-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
}

.code-title h1 {
  font-size: 1.12rem;
  color: #fff;
  font-weight: 900;
  letter-spacing: .04em;
  text-transform: uppercase;
  margin-bottom: 2px;
}

.code-title p {
  color: rgba(255,255,255,.56);
  font-size: .82rem;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.balance-pill {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  border-radius: 8px;
  border: 1px solid var(--code-line);
  background: rgba(255,255,255,.055);
  color: var(--code-gold);
  font-weight: 800;
  font-size: .84rem;
  text-decoration: none;
}

.code-home-float {
  position: fixed;
  left: max(16px, env(safe-area-inset-left));
  bottom: max(16px, env(safe-area-inset-bottom));
  z-index: 22;
  width: 48px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid rgba(82,190,255,.35);
  background: rgba(9,9,14,.9);
  color: #fff;
  text-decoration: none;
  box-shadow: 0 12px 28px rgba(0,0,0,.38);
  backdrop-filter: blur(10px);
  transition: transform .15s, border-color .15s, color .15s;
}

.code-home-float:hover {
  transform: translateY(-1px);
  color: var(--code-accent);
  border-color: rgba(82,190,255,.72);
}

.code-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 290px;
  gap: 14px;
  align-items: start;
}

.tier-grid {
  display: grid;
  gap: 12px;
}

.tier-card,
.side-card,
.mobile-card {
  background: var(--code-panel);
  border: 1px solid var(--code-line);
  border-radius: 8px;
  box-shadow: 0 18px 45px rgba(0,0,0,.28);
}

.tier-card {
  padding: 14px;
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
}

.digit-badge {
  width: 72px;
  height: 72px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%, #10131d 0 48%, transparent 49%),
    conic-gradient(from -45deg, var(--code-accent), #35d07f, #f4d77c, var(--code-accent));
  font-size: 1.55rem;
  font-weight: 900;
  color: #fff;
}

.tier-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
  margin-bottom: 10px;
}

.tier-name {
  font-size: 1rem;
  font-weight: 900;
  color: #fff;
}

.tier-meta {
  color: rgba(255,255,255,.56);
  font-size: .78rem;
  margin-top: 2px;
}

.prize {
  color: var(--code-gold);
  font-weight: 900;
  white-space: nowrap;
}

.guess-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.guess-input,
.mobile-input {
  width: 100%;
  background: rgba(0,0,0,.32);
  color: #fff;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 8px;
  padding: 11px 12px;
  font-size: 1rem;
  font-weight: 800;
  outline: none;
}

.guess-input:focus,
.mobile-input:focus {
  border-color: rgba(82,190,255,.7);
  box-shadow: 0 0 0 3px rgba(82,190,255,.14);
}

.guess-btn,
.mobile-btn {
  border: 1px solid rgba(82,190,255,.46);
  background: #12648f;
  color: #fff;
  border-radius: 8px;
  padding: 0 14px;
  min-height: 44px;
  font-weight: 900;
  cursor: pointer;
}

.guess-btn:disabled {
  cursor: not-allowed;
  opacity: .45;
}

.tier-foot {
  margin-top: 8px;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-size: .76rem;
  color: rgba(255,255,255,.58);
}

.tier-status.win { color: var(--code-green); }
.tier-status.lose { color: var(--code-red); }

.side-card,
.mobile-card {
  padding: 14px;
}

.side-title {
  color: rgba(255,255,255,.54);
  font-size: .76rem;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.rules-list,
.attempt-list {
  display: grid;
  gap: 8px;
  font-size: .82rem;
  color: rgba(255,255,255,.66);
  line-height: 1.35;
}

.attempt-row {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
  padding: 8px;
  border-radius: 8px;
  background: rgba(255,255,255,.04);
}

.attempt-row.win {
  border: 1px solid rgba(53,208,127,.35);
  color: #fff;
}

.attempt-code {
  font-weight: 900;
  color: #fff;
}

.attempt-result {
  font-size: .72rem;
  font-weight: 900;
  color: var(--code-red);
  text-transform: uppercase;
}

.attempt-row.win .attempt-result { color: var(--code-green); }

.mobile-card {
  display: none;
  margin-bottom: 12px;
}

.mobile-card.active { display: block; }

.mobile-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  margin-top: 10px;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  z-index: 20;
  width: min(360px, calc(100% - 28px));
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(9,9,14,.96);
  color: #fff;
  text-align: center;
  font-weight: 800;
  box-shadow: 0 16px 45px rgba(0,0,0,.45);
}

.toast.win { border-color: rgba(53,208,127,.45); color: var(--code-green); }
.toast.lose { border-color: rgba(255,82,82,.45); color: var(--code-red); }

@media (max-width: 760px) {
  .code-grid { grid-template-columns: 1fr; }
  .code-top { align-items: flex-start; }
  .tier-card { grid-template-columns: 58px minmax(0, 1fr); padding: 12px; }
  .digit-badge { width: 58px; height: 58px; font-size: 1.25rem; }
}

@media (max-width: 420px) {
  body {
    padding-bottom: calc(96px + env(safe-area-inset-bottom));
  }
  .code-shell {
    min-height: auto;
    padding: 10px 10px calc(104px + env(safe-area-inset-bottom));
    gap: 10px;
  }
  .code-top { flex-direction: column; }
  .top-actions { width: 100%; justify-content: space-between; }
  .balance-pill { flex: 1; }
  .code-home-float {
    left: max(10px, env(safe-area-inset-left));
    bottom: max(10px, env(safe-area-inset-bottom));
    width: 46px;
    height: 46px;
  }
  .tier-head,
  .tier-foot { flex-direction: column; gap: 4px; }
  .guess-row,
  .mobile-form { grid-template-columns: 1fr; }
  .guess-btn,
  .mobile-btn { width: 100%; }
}