/* WhatsApp 16th Anniversary - Index Page */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-dark: #1a1a2e;
  --bg-card: #16213e;
  --accent-gold: #f4c430;
  --accent-gold-glow: #ffd700;
  --text-white: #ffffff;
  --text-muted: #b8b8b8;
  --whatsapp-green: #25d366;
  --free-sign-bg: #4fc3f7;
  --btn-white: #ffffff;
  --btn-text: #1a1a2e;
  --footer-border: rgba(255, 255, 255, 0.25);
}

html {
  font-size: 16px;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: radial-gradient(circle at 50% 10%, #1a2c4e 0%, #050a14 100%);
  min-height: 100vh;
  color: var(--text-white);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem 1.25rem 0;
  overflow-x: hidden;
}

/* Top decorative dot */
/* Top dot: inner light yellow glow + outer thin ring */
.top-dot {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid #4c5d6c;
  background: transparent;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.top-dot::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #fdf0b0;
  box-shadow: 0 0 10px #fdf0b0, 0 0 20px rgba(253, 240, 176, 0.45);
}

/* Main heading */
.main-title {
  text-align: center;
  margin-bottom: 2rem;
  line-height: 1.2;
}

.main-title .line1 {
  font-size: clamp(1.9rem, 6.5vw, 2.6rem);
  font-weight: 700;
  color: var(--accent-gold);
  text-shadow: 0 0 20px var(--accent-gold-glow), 0 0 40px rgba(255, 215, 0, 0.4);
  letter-spacing: 0.02em;
}

.main-title .line1 sup {
  font-size: 0.5em;
  vertical-align: super;
  line-height: 0;
}

.main-title .line2,
.main-title .line3 {
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  font-weight: 700;
  color: var(--accent-gold);
  text-shadow: 0 0 16px var(--accent-gold-glow), 0 0 32px rgba(255, 215, 0, 0.35);
  letter-spacing: 0.02em;
}

/* Offer card - single image */
.offer-card {
  width: 100%;
  max-width: 480px;
  border-radius: 24px;
  overflow: hidden;
  margin-bottom: 2rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.offer-card-img {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: top;
}

/* Instruction text */
.instruction {
  text-align: center;
  margin-bottom: 1.5rem;
}

.instruction .tagline {
  font-size: clamp(1rem, 3.5vw, 1.15rem);
  font-weight: 700;
  color: var(--accent-gold);
  text-shadow: 0 0 12px rgba(255, 215, 0, 0.35);
  margin-bottom: 0.35rem;
}

.instruction .sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 400;
}

.cta-question {
  font-size: clamp(1rem, 3.5vw, 1.2rem);
  font-weight: 800;
  text-align: center;
  letter-spacing: 0.15em;
  color: var(--text-white);
  margin-bottom: 1.25rem;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* Start button */
.btn-start {
  display: block;
  width: 100%;
  max-width: 280px;
  margin: 0 auto 0;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--btn-text);
  background: var(--btn-white);
  border: none;
  border-radius: 999px;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.btn-start:hover {
  transform: scale(1.02);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.25);
}

.btn-start:active {
  transform: scale(0.98);
}

/* Footer - pinned to bottom, compact */
body > footer {
  margin-top: auto;
  padding: 1.5rem 0 1rem;
  width: 100%;
  max-width: 340px;
}

.footer-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.footer-tag {
  padding: 0.4rem 0.75rem;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--footer-border);
  border-radius: 8px;
  letter-spacing: 0.03em;
}

.footer-tag:last-child {
  color: var(--accent-gold);
  border-color: var(--accent-gold);
}

.footer-copy {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-align: center;
  opacity: 0.9;
  padding-bottom: 0.5rem;
}

@media (min-width: 480px) {
  .offer-card {
    padding: 1.75rem 1.5rem 2rem;
  }

  .confetti-left,
  .confetti-right {
    width: 64px;
    height: 64px;
  }
}