:root {
  --bg: #07111f;
  --bg-2: #0d1a2b;
  --panel: rgba(10, 18, 33, 0.78);
  --panel-strong: rgba(13, 22, 40, 0.92);
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(142, 197, 252, 0.25);
  --text: #eef4ff;
  --muted: #95a8c7;
  --accent: #80c8ff;
  --accent-2: #7d8cff;
  --accent-3: #7ef0d2;
  --danger: #ff829d;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
  --radius: 22px;
}

*, *::before, *::after { box-sizing: border-box; }
html, body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}
body {
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(94, 129, 255, 0.18), transparent 28%),
    linear-gradient(180deg, #08101d 0%, #0a1322 48%, #060c16 100%);
  line-height: 1.5;
  position: relative;
}

.bg-orb {
  position: fixed;
  width: 44vw;
  height: 44vw;
  border-radius: 999px;
  filter: blur(55px);
  opacity: 0.22;
  pointer-events: none;
  z-index: 0;
}
.orb-a { top: -10vw; left: -8vw; background: #49a6ff; }
.orb-b { right: -10vw; bottom: 10vh; background: #7f8dff; }
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.55), transparent 92%);
  pointer-events: none;
  z-index: 0;
}

.wrap {
  position: relative;
  z-index: 1;
  max-width: min(100%, 520px);
  margin: 0 auto;
  padding: 16px 14px 28px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  gap: 14px;
}

.site-header {
  text-align: center;
  padding-top: 8px;
}
.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.74rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}
.title {
  margin: 0;
  font-size: clamp(2rem, 7vw, 3rem);
  line-height: 1.04;
  letter-spacing: 0.04em;
  text-shadow: 0 10px 30px rgba(125, 140, 255, 0.28);
}
.subtitle {
  margin: 10px auto 0;
  max-width: 28rem;
  color: var(--muted);
  font-size: 0.98rem;
}

.main {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.82rem;
  padding-bottom: 8px;
}
.screen { display: block; }

.card {
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-wrap: anywhere;
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}
.glass {
  background: var(--panel);
}
.card.center {
  align-items: center;
  text-align: center;
}

.hero-card {
  position: relative;
  overflow: hidden;
}
.hero-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top right, rgba(126, 240, 210, 0.14), transparent 30%),
    radial-gradient(circle at left top, rgba(128, 200, 255, 0.18), transparent 34%);
  pointer-events: none;
}
.hero-badge {
  align-self: flex-start;
  padding: 6px 12px;
  border: 1px solid rgba(128, 200, 255, 0.3);
  border-radius: 999px;
  color: var(--accent);
  background: rgba(128, 200, 255, 0.1);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}
.hero-title {
  margin: 0;
  font-size: clamp(1.5rem, 5.6vw, 2.2rem);
  line-height: 1.2;
}
.hero-copy {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}
.hero-copy strong { color: var(--text); }

.rule-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.pill {
  border-radius: 999px;
  padding: 8px 12px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.07);
  color: var(--text);
  font-size: 0.88rem;
}

.howto-grid {
  display: grid;
  gap: 10px;
}
.mini-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 18px;
  padding: 14px;
}
.mini-card h3 {
  margin: 8px 0 6px;
  font-size: 1rem;
}
.mini-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}
.step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  min-height: 28px;
  border-radius: 999px;
  padding: 0 10px;
  background: linear-gradient(135deg, rgba(128,200,255,0.22), rgba(125,140,255,0.18));
  border: 1px solid var(--line-strong);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
}
.rule-note {
  padding: 14px;
  border-radius: 16px;
  background: rgba(126, 240, 210, 0.08);
  border: 1px solid rgba(126, 240, 210, 0.15);
  color: var(--muted);
  font-size: 0.9rem;
}
.rule-note span { color: var(--accent-3); font-weight: 700; }

.topbar {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  align-items: stretch;
}
.info {
  display: grid;
  gap: 4px;
  justify-items: center;
  padding: 8px 4px;
  border-radius: 16px;
  background: rgba(255,255,255,0.04);
}
.info span {
  color: var(--muted);
  font-size: 0.84rem;
}
.info strong {
  font-size: 1.45rem;
}

.panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.panel-head h2 {
  margin: 0;
  font-size: 1rem;
}
.panel-head p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}
.code-display {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  align-items: center;
  justify-items: center;
}
.slot {
  width: 100%;
  background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.03));
  border: 1px solid rgba(128, 200, 255, 0.18);
  border-radius: 20px;
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 2rem;
  letter-spacing: 0.08em;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08);
}
.message {
  margin: 0;
  min-height: 24px;
  color: var(--accent);
  font-size: 0.95rem;
}
.grid-wrap { width: 100%; }
.section-label {
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.number-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  width: 100%;
}
.num-btn {
  background: linear-gradient(180deg, rgba(255,255,255,0.09), rgba(255,255,255,0.03));
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 18px;
  padding: 12px 0;
  min-height: 58px;
  font-size: 1.18rem;
  font-weight: 800;
  cursor: pointer;
  touch-action: manipulation;
  transition: transform 0.12s ease, border-color 0.12s ease, background 0.12s ease;
}
.num-btn:hover,
.num-btn:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(128, 200, 255, 0.3);
  outline: none;
}
.num-btn:active {
  transform: scale(0.98);
  background: rgba(128, 200, 255, 0.12);
}

.controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.btn {
  border-radius: 18px;
  border: 1px solid transparent;
  min-height: 54px;
  font-size: 1rem;
  font-weight: 800;
  cursor: pointer;
  touch-action: manipulation;
  transition: transform 0.12s ease, filter 0.12s ease;
}
.btn:hover,
.btn:focus-visible {
  transform: translateY(-1px);
  filter: brightness(1.04);
  outline: none;
}
.btn:active {
  transform: scale(0.985);
}
.btn.primary {
  color: #05111d;
  background: linear-gradient(135deg, var(--accent-3), var(--accent));
  box-shadow: 0 10px 24px rgba(126, 240, 210, 0.2);
}
.btn.secondary {
  background: rgba(255,255,255,0.05);
  color: var(--text);
  border-color: rgba(255,255,255,0.08);
}
.btn.large {
  min-height: 60px;
  font-size: 1.05rem;
}

.log {
  display: flex;
  gap: 8px;
}
.log h3 {
  margin: 0;
  font-size: 1rem;
}
.log-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  max-height: 260px;
  overflow-y: auto;
}
.log-item {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px;
  padding: 10px 12px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: center;
}
.log-guess {
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: 0.08em;
}
.badge {
  background: rgba(128, 200, 255, 0.12);
  color: var(--accent);
  border: 1px solid rgba(128, 200, 255, 0.2);
  border-radius: 999px;
  padding: 5px 10px;
  font-size: 0.84rem;
  font-weight: 700;
}
.result-card h2 {
  margin: 4px 0 0;
  font-size: 1.8rem;
}
.result-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  width: 100%;
}
.final-line {
  margin: 0;
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  color: var(--muted);
}
.final-line strong {
  color: var(--text);
  font-size: 1.2rem;
}

@media (max-width: 420px) {
  .wrap { padding-inline: 12px; }
  .title { font-size: 2.2rem; }
  .slot { min-height: 68px; font-size: 1.8rem; }
  .num-btn { min-height: 54px; border-radius: 16px; }
}

@media (max-width: 360px) {
  .hero-title { font-size: 1.42rem; }
  .mini-card { padding: 12px; }
  .num-btn { min-height: 50px; padding: 10px 0; }
  .slot { min-height: 60px; }
  .btn { min-height: 48px; }
}