/* Intro page — responsive layout */

.intro-screen {
  padding: clamp(12px, 3vw, 32px);
  align-items: flex-start;
}

.intro-screen.active {
  display: flex;
  min-height: 100vh;
  min-height: 100dvh;
}

.intro-shell {
  max-width: min(1040px, 100%);
  width: 100%;
  text-align: center;
  margin: auto;
}

.intro-hero {
  margin-bottom: clamp(20px, 4vw, 32px);
}

.intro-hero .lead {
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
}

.intro-grid {
  display: grid;
  gap: clamp(16px, 3vw, 24px);
  text-align: right;
  margin-bottom: clamp(20px, 4vw, 28px);
}

.intro-card {
  background: var(--surface-soft, #f8fafc);
  border: 1px solid var(--line, #e2e8f0);
  border-radius: 12px;
  padding: clamp(18px, 3vw, 28px);
}

.intro-card h2 {
  margin: 0 0 14px;
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  font-weight: 800;
  color: var(--ink);
}

.intro-rules ul {
  margin: 0;
  padding-right: 1.25rem;
  line-height: 1.85;
  color: var(--muted);
  font-size: clamp(0.88rem, 2.2vw, 0.98rem);
}

.intro-rules li + li {
  margin-top: 0.5em;
}

.intro-rules-note {
  margin: 16px 0 0;
  padding: 12px 14px;
  border-radius: 10px;
  background: rgba(15, 118, 110, 0.08);
  border-right: 3px solid #0f766e;
  line-height: 1.85;
  color: var(--muted);
  font-size: clamp(0.86rem, 2.1vw, 0.95rem);
}

.intro-countdown {
  margin: 0 auto clamp(20px, 4vw, 28px);
  padding: clamp(18px, 3vw, 24px);
  max-width: 520px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(15, 118, 110, 0.12), rgba(34, 211, 238, 0.14));
  border: 1px solid rgba(15, 118, 110, 0.25);
  box-shadow: 0 10px 30px rgba(15, 118, 110, 0.12);
}

.intro-countdown-label {
  margin: 0 0 14px;
  font-size: clamp(1rem, 2.4vw, 1.12rem);
  font-weight: 800;
  color: #0f766e;
}

.intro-countdown-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.intro-countdown-unit {
  padding: 12px 8px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid rgba(15, 118, 110, 0.15);
  text-align: center;
}

.intro-countdown-unit strong {
  display: block;
  font-size: clamp(1.5rem, 5vw, 2rem);
  line-height: 1.1;
  color: var(--ink);
  direction: ltr;
  font-variant-numeric: tabular-nums;
}

.intro-countdown-unit span {
  display: block;
  margin-top: 6px;
  font-size: 0.82rem;
  color: var(--muted);
}

.intro-countdown-start {
  margin: 0;
  font-weight: 700;
  color: #0f766e;
}

.intro-countdown-live {
  animation: introCountdownPulse 1.2s ease-in-out infinite;
}

@keyframes introCountdownPulse {
  0%, 100% { box-shadow: 0 10px 30px rgba(15, 118, 110, 0.12); }
  50% { box-shadow: 0 10px 36px rgba(15, 118, 110, 0.28); }
}

.intro-side {
  display: grid;
  gap: clamp(16px, 3vw, 20px);
  align-content: start;
}

.prize-list {
  display: grid;
  gap: 10px;
}

.prize-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 10px;
  background: #fff;
  border: 1px solid var(--line);
}

.prize-rank {
  font-size: 0.9rem;
  color: var(--muted);
}

.prize-item strong {
  font-size: 1.1rem;
  direction: ltr;
  color: var(--ink);
}

.prize-gold { border-right: 4px solid #f59e0b; }
.prize-silver { border-right: 4px solid #94a3b8; }
.prize-bronze { border-right: 4px solid #b45309; }
.prize-other { border-right: 4px solid var(--accent, #22d3ee); }

.intro-support {
  margin-top: 10px;
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
}

.intro-status p {
  margin: 0;
  line-height: 1.75;
  font-size: clamp(0.88rem, 2.2vw, 0.95rem);
  color: var(--muted);
}

.intro-status-open p { color: #0f766e; }
.intro-status-before p { color: #b45309; }
.intro-status-after p { color: #4338ca; }

.intro-actions {
  padding-top: 4px;
}

.intro-cta {
  display: block;
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
  text-align: center;
  text-decoration: none;
  font-size: clamp(1rem, 2.5vw, 1.1rem);
  padding: clamp(14px, 3vw, 18px) 24px;
}

/* Desktop: two-column spacious layout */
@media (min-width: 768px) {
  .intro-grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
  }

  .intro-shell {
    padding: clamp(28px, 4vw, 44px);
  }
}

/* Large desktop: extra width breathing room */
@media (min-width: 1200px) {
  .intro-shell {
    max-width: 1100px;
  }
}

/* Mobile: stack, touch-friendly */
@media (max-width: 767px) {
  .intro-screen {
    padding: 10px;
    align-items: stretch;
  }

  .intro-shell {
    padding: 18px 16px 22px;
    border-radius: 12px;
  }

  .intro-hero .mark {
    width: 56px;
    height: 56px;
    font-size: 1.5rem;
    margin-bottom: 12px;
  }

  .intro-hero h1 {
    font-size: 1.45rem;
    line-height: 1.4;
  }

  .intro-hero .lead {
    font-size: 0.92rem;
    margin-bottom: 16px;
  }

  .intro-card {
    padding: 16px;
  }

  .intro-rules ul {
    padding-right: 1rem;
    line-height: 1.7;
  }

  .prize-item {
    padding: 10px 14px;
  }

  .prize-item strong {
    font-size: 1rem;
  }

  .intro-cta {
    max-width: none;
    min-height: 52px;
  }

  .intro-countdown-grid {
    gap: 8px;
  }

  .intro-countdown-unit {
    padding: 10px 6px;
  }
}

/* Very small phones */
@media (max-width: 380px) {
  .intro-shell {
    padding: 14px 12px 18px;
  }

  .intro-card h2 {
    font-size: 0.95rem;
  }
}