:root {
  --brand: #2F6BFF;
  --brand-accent: #4C8DFF;
  --success: #22A06B;
  --danger: #E5484D;
  --danger-bg: #FFF1F0;
  --card: #ffffff;
  --shadow: 0 8px 28px rgba(47, 107, 255, 0.08), 0 2px 8px rgba(15, 23, 42, 0.04);
  --radius-card: 20px;
  --radius-btn: 14px;
  --bg: var(--tg-theme-bg-color, #ffffff);
  --text: var(--tg-theme-text-color, #0F172A);
  --hint: var(--tg-theme-hint-color, #64748B);
  --secondary: var(--tg-theme-secondary-bg-color, #F4F7FB);
  --button: var(--brand);
  --button-text: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --card: var(--tg-theme-secondary-bg-color, #1C1C1E);
    --shadow: 0 8px 28px rgba(0, 0, 0, 0.28);
  }
}

html.tg-dark {
  --card: var(--tg-theme-secondary-bg-color, #1C1C1E);
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.28);
  --bg: var(--tg-theme-bg-color, #000000);
  --text: var(--tg-theme-text-color, #F8FAFC);
  --hint: var(--tg-theme-hint-color, #94A3B8);
  --secondary: var(--tg-theme-secondary-bg-color, #1C1C1E);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

body { min-height: 100vh; }

#app {
  padding: 20px 18px 28px;
  max-width: 480px;
  margin: 0 auto;
  position: relative;
}

.hidden { display: none !important; }

/* Progress — thin blue bar */
.progress {
  margin: 0 0 20px;
}
.progress-track {
  width: 100%;
  height: 3px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--brand) 12%, transparent);
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--brand), var(--brand-accent));
  transition: width 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Cards */
.card {
  background: var(--card);
  border-radius: var(--radius-card);
  padding: 28px 22px;
  margin-bottom: 14px;
  box-shadow: var(--shadow);
}
.card.card-soft {
  box-shadow: var(--shadow);
}
.card h1, .card h2 {
  margin: 0 0 8px;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-align: center;
  color: var(--text);
}
.card h1 { font-size: 1.55rem; }

.lead {
  text-align: center;
  color: var(--hint);
  font-size: 0.98rem;
  line-height: 1.45;
  margin: 0 0 20px;
}

.muted { color: var(--hint); font-size: 0.92rem; }
.center { text-align: center; }

.notice {
  text-align: left;
  margin: 0 0 18px;
  padding: 12px 14px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--brand) 8%, var(--card));
  color: var(--text);
  font-size: 0.92rem;
  line-height: 1.45;
}
html.tg-dark .notice {
  background: color-mix(in srgb, var(--brand) 14%, var(--card));
}

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

.chance {
  margin: 20px 0 8px;
  text-align: center;
}
.chance .label {
  display: block;
  color: var(--hint);
  font-size: 0.92rem;
  margin-bottom: 4px;
}
.chance strong {
  display: block;
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--brand);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

/* Buttons */
.btn {
  display: block;
  width: 100%;
  border: 0;
  border-radius: var(--radius-btn);
  padding: 16px 18px;
  margin: 10px 0 0;
  font-size: 1.02rem;
  font-weight: 600;
  background: var(--brand);
  color: var(--button-text);
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease, background 0.15s ease;
}
.btn:active:not(:disabled) { transform: scale(0.98); }
.btn:disabled { opacity: 0.55; cursor: default; }
.btn.secondary {
  background: transparent;
  color: var(--brand);
  border: 1.5px solid color-mix(in srgb, var(--brand) 35%, transparent);
}
.btn.secondary:active:not(:disabled) {
  background: color-mix(in srgb, var(--brand) 6%, transparent);
}
.btn.ghost {
  background: transparent;
  color: var(--hint);
  border: 0;
  font-weight: 500;
}

.error {
  background: var(--danger-bg);
  color: var(--danger);
  box-shadow: none;
  font-size: 0.95rem;
  line-height: 1.4;
}

html.tg-dark .error {
  background: color-mix(in srgb, var(--danger) 18%, var(--card));
}

.captcha-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 4px;
}
.captcha-options .btn {
  margin: 0;
  background: color-mix(in srgb, var(--brand) 8%, var(--card));
  color: var(--brand);
  border: 1.5px solid color-mix(in srgb, var(--brand) 22%, transparent);
}
.captcha-options .btn:active:not(:disabled) {
  background: var(--brand);
  color: #fff;
}

.list-item {
  background: var(--secondary);
  border-radius: 14px;
  padding: 14px 14px 12px;
  margin: 10px 0;
}
.list-item strong {
  display: block;
  margin-bottom: 2px;
}
.list-item .btn {
  margin-top: 10px;
  padding: 12px 14px;
  font-size: 0.95rem;
}

.stat-box {
  background: var(--secondary);
  border-radius: 14px;
  padding: 14px 16px;
  margin: 16px 0 8px;
}

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}
.tab {
  flex: 1;
  border: 0;
  border-radius: 12px;
  padding: 11px 8px;
  background: var(--secondary);
  color: var(--hint);
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
}
.tab.active {
  background: var(--brand);
  color: #fff;
}

/* Replaceable illustrations (swap later for product mascot) */
.illustration {
  width: 72px;
  height: 72px;
  margin: 0 auto 18px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--brand) 10%, transparent);
  color: var(--brand);
}
.illustration svg {
  width: 36px;
  height: 36px;
  display: block;
}
.illustration.success {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--brand) 12%, transparent);
  animation: success-pop 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}
.illustration.success svg {
  width: 44px;
  height: 44px;
}
.illustration.thanks {
  background: color-mix(in srgb, var(--brand) 10%, transparent);
}

@keyframes success-pop {
  0% { transform: scale(0.72); opacity: 0; }
  60% { transform: scale(1.06); opacity: 1; }
  100% { transform: scale(1); }
}

/* Screen transitions */
.screen-enter {
  animation: screen-in 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}
@keyframes screen-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.actions {
  margin-top: 8px;
}