/* ========= Light Mode ========= */
body {
  font-family: 'Roboto', sans-serif;
  margin: 0;
  padding-top: 60px;
  background-color: #f8fafc; /* light page bg */
  color: #0f172a;            /* primary text */
  text-align: center;
  align-items: center;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main { flex-grow: 1; }

/* ===== Hero ===== */
.hero {
  background: #ffffff;
  padding: 50px;
  border: 1px solid #e2e8f0;
  box-shadow:
    inset 5px 5px 15px rgba(15,23,42,.05),
    inset -5px -5px 15px rgba(15,23,42,.06),
    0 0 20px rgba(14,165,164,.20),
    0 0 36px rgba(14,165,164,.25);
  border-radius: 15px;
  width: 90%;
  max-width: 1200px;
  margin-top: 80px;
  animation: neon-glow 1.5s infinite alternate;
}

@keyframes neon-glow {
  from {
    box-shadow:
      inset 5px 5px 15px rgba(15,23,42,.05),
      inset -5px -5px 15px rgba(15,23,42,.06),
      0 0 20px rgba(14,165,164,.20),
      0 0 36px rgba(14,165,164,.25);
  }
  to {
    box-shadow:
      inset 5px 5px 15px rgba(15,23,42,.05),
      inset -5px -5px 15px rgba(15,23,42,.06),
      0 0 28px rgba(14,165,164,.28),
      0 0 48px rgba(14,165,164,.35);
  }
}

/* ===== Buttons ===== */
.btn-green {
  display: inline-block;
  background: linear-gradient(145deg, #0ea5a4, #0d9488); /* accent -> hover */
  color: #ffffff;
  padding: 15px 25px;
  text-decoration: none;
  border-radius: 10px;
  font-weight: bold;
  transition: .3s ease-in-out;
  box-shadow: 0 0 16px rgba(14,165,164,.3), 0 0 28px rgba(14,165,164,.25);
  border: 1px solid #0ea5a4;
  font-size: 18px;
}
.btn-green:hover {
  background: linear-gradient(145deg, #0d9488, #0ea5a4);
  box-shadow: 0 0 22px rgba(14,165,164,.35), 0 0 40px rgba(14,165,164,.3);
}

/* ===== Sections ===== */
.features, .how-it-works, .promo-tips, .faq, .cta {
  background: #ffffff;
  padding: 50px;
  border: 1px solid #e2e8f0;
  box-shadow:
    8px 8px 20px rgba(15,23,42,.06),
    -8px -8px 20px rgba(15,23,42,.04),
    0 0 16px rgba(14,165,164,.14),
    0 0 28px rgba(14,165,164,.10);
  margin: 20px auto;
  border-radius: 15px;
  max-width: 1000px;
  width: 90%;
  animation: neon-pulse 2s infinite alternate;
}

@keyframes neon-pulse {
  from {
    box-shadow:
      8px 8px 20px rgba(15,23,42,.06),
      -8px -8px 20px rgba(15,23,42,.04),
      0 0 16px rgba(14,165,164,.14),
      0 0 28px rgba(14,165,164,.10);
  }
  to {
    box-shadow:
      8px 8px 20px rgba(15,23,42,.06),
      -8px -8px 20px rgba(15,23,42,.04),
      0 0 22px rgba(14,165,164,.20),
      0 0 36px rgba(14,165,164,.16);
  }
}

/* ===== Features grid ===== */
.features-grid {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
}
.feature {
  width: 30%;
  text-align: center;
  padding: 20px;
  font-size: 18px;
  color: #0b8078; /* accent-700 */
  border-radius: 10px;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  box-shadow:
    inset 5px 5px 10px rgba(15,23,42,.03),
    inset -5px -5px 10px rgba(15,23,42,.04);
}
.feature .icon {
  font-size: 40px;
  display: block;
  margin-bottom: 10px;
  color: #0b8078;
}

/* ===== Steps ===== */
.steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}
.step {
  text-align: center;
  max-width: 220px;
  padding: 20px;
  border-radius: 10px;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  box-shadow: 6px 6px 12px rgba(15,23,42,.06), -6px -6px 12px rgba(15,23,42,.04);
}
.number {
  font-size: 50px;
  font-weight: bold;
  color: #0d9488; /* accent-600 */
  display: block;
  margin-bottom: 10px;
  text-shadow: 0 0 10px rgba(14,165,164,.35);
}
.step p {
  font-size: 16px;
  color: #334155; /* slate-700 */
}
.step-arrow { width: 80px; }

/* ===== FAQ ===== */
.faq {
  max-width: 1000px;
  width: 90%;
  margin: auto;
  padding: 50px;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  box-shadow:
    8px 8px 20px rgba(15,23,42,.06),
    -8px -8px 20px rgba(15,23,42,.04),
    0 0 14px rgba(14,165,164,.16);
  border-radius: 15px;
}
.faq h2 {
  font-size: 28px;
  color: #0d9488;
  text-align: center;
  margin-bottom: 20px;
}
.faq-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 20px;
}
.faq-item {
  background: #ffffff;
  padding: 15px 20px;
  border-radius: 10px;
  border: 1px solid #e2e8f0;
  box-shadow:
    inset 5px 5px 10px rgba(15,23,42,.03),
    inset -5px -5px 10px rgba(15,23,42,.04);
  cursor: pointer;
  transition: background-color .3s ease, border-color .3s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}
.faq-item:hover { background: #e6fbf8; /* accent-soft */ }
.faq-question {
  font-size: 18px;
  color: #0d9488;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  cursor: pointer;
}
.faq-icon { font-size: 20px; font-weight: bold; color: #0d9488; }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  font-size: 16px;
  color: #475569;
  text-align: center;
  width: 100%;
  padding: 0 10px;
  margin-top: 5px;
  transition: max-height .4s ease-in-out, opacity .3s ease-in-out;
  opacity: 0;
}
.faq-item.active .faq-answer {
  max-height: 150px;
  opacity: 1;
}

/* ===== CTA ===== */
.cta h2 { color: #0d9488; }
.cta p { font-size: 18px; }
.cta .btn-green { font-size: 18px; }

/* ===== Responsive ===== */
@media (max-width: 767px) {
  html, body { overflow-x: hidden; }

  .hero {
    width: 100%;
    padding: 20px;
    margin: 40px auto 20px;
    text-align: center;
    animation: none !important;
    box-shadow: none !important;
    background: #ffffff !important;
    border: 1px solid #e2e8f0 !important;
  }
  .hero h1 { font-size: 28px; line-height: 1.2; }
  .hero p { font-size: 14px; }

  .btn-green {
    display: inline-block;
    padding: 10px 18px;
    font-size: 14px;
    animation: none !important;
    box-shadow: none !important;
  }

  .features,
  .how-it-works,
  .promo-tips,
  .faq,
  .cta {
    width: 100%;
    padding: 20px;
    margin: 10px auto;
    animation: none !important;
    box-shadow: none !important;
    background: #ffffff !important;
    border: 1px solid #e2e8f0 !important;
  }

  .features-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  .feature {
    width: 100%;
    padding: 12px;
    margin: 0 auto;
    font-size: 14px;
  }
  .feature .icon { font-size: 32px; }

  .steps {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }
  .step {
    width: 90%;
    max-width: none;
    padding: 12px;
    margin: 0 auto;
  }
  .number { font-size: 28px; }
  .step p { font-size: 13px; }

  .step-arrow { display: none !important; }

  .promo-tips .tip {
    display: flex; flex-direction: column; align-items: center;
    gap: 10px; width: 100%; margin: 15px 0;
  }
  .promo-tips .tip img {
    width: 100%; height: auto; margin: 0 auto;
  }
  .promo-tips .tip-text { padding: 10px 0; width: 100%; }
  .promo-tips .tip-text h3 { font-size: 18px; }
  .promo-tips .tip-text p { font-size: 14px; }

  .cta h2 { font-size: 20px; }
  .cta p { font-size: 14px; }
  .cta .btn-green { padding: 10px 18px; font-size: 14px; }

  .faq-container {
    display: grid; grid-template-columns: 1fr; gap: 12px;
  }
  .faq-item {
    width: 100%; padding: 12px;
    display: flex; flex-direction: column; align-items: center; text-align: center;
  }
  .faq-question { font-size: 14px; justify-content: center; }
  .faq-answer { font-size: 13px; }
}