:root {
  /* Evershine Diagnostics – Warm Red Medical Theme */
  --primary-1: #E81F22;   /* brand matte red for buttons */   /* deep medical red (cards/accent) */
  --primary-2: #15803d;   /* supportive green (secondary) */
  --bg-soft-red: #fff1f2; /* soft red background */
  --bg-soft-red-2: #ffe4e6;
  --bg-soft-green: #f0fdf4;
  --bg-warm-mix: linear-gradient(120deg, #fff1f2 0%, #ffe4e6 100%);
  --text-dark: #0b0b0b;   /* black */
  --text-muted: #525252; /* gray */
  --text-invert: #ffffff;/* white */
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', sans-serif;
  color: var(--text-dark);
  background: var(--bg-warm-green);
  scroll-behavior: smooth;
}

/* ---------------- NAVBAR ---------------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #ffffff; /* pure white navbar */
  box-shadow: 0 8px 24px rgba(232, 31, 34, 0.12); /* soft red shadow */
}

.nav-container {
  max-width: 1200px;
  margin: auto;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-weight: 800;
  font-size: 20px;
  color: var(--primary-1);
}

.logo span {
  color: var(--primary-2);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
  color: var(--text-muted);
  position: relative;
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: var(--text-dark);
}

.nav-links a.active {
  color: var(--text-dark);
  font-weight: 700;
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 3px;
  border-radius: 3px;
  background: var(--primary-1);
}

/* ---------------- PRIMARY BUTTON ---------------- */
.btn-primary {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 999px;
  background: #E81F22;
  color: var(--text-invert);
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 6px 16px rgba(232,31,34,0.35);
  transition: background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
  white-space: nowrap;
}

.btn-primary:hover {
  background: #c81c1f;
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(232,31,34,0.45);
}

/* ---------------- HERO ---------------- */
.hero-wrapper {
  margin: 10px auto;
  width: 90vw;
  max-width: none;
  padding: 60px 40px;
  border-radius: 32px;
  background: var(--bg-warm-mix);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.hero-title {
  font-size: 44px;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero-text {
  margin-top: 18px;
  max-width: 520px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-muted);
}

.hero-actions {
  margin-top: 32px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.watch {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  text-decoration: none;
  color: var(--text-dark);
}

.watch span {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #ede9fe;
  color: var(--primary-1);
  font-size: 14px;
}

.mockup {
  display: flex;
  justify-content: center;
}

.phone {
  width: 300px;
  border-radius: 36px;
  box-shadow: 0 30px 80px rgba(15,23,42,0.15);
}

/* ---------------- RESPONSIVE ---------------- */
@media (max-width: 900px) {
  .hero-wrapper {
    grid-template-columns: 1fr;
    padding: 40px 24px;
  }

  .hero-title {
    font-size: 36px;
  }

  .mockup {
    margin-top: 40px;
  }
}

@media (max-width: 600px) {
  .nav-links {
    display: none; /* we will add mobile menu later */
  }

  .hero-title {
    font-size: 30px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }
}


/* ---------------- AWARDS ---------------- */
.awards-section {
  scroll-margin-top: 90px;

  padding: 100px 20px;
}

.awards-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.awards-header h2 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.awards-header p {
  margin-top: 14px;
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.6;
}

.awards-grid {
  width: 90vw;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.award-card {
  background: var(--bg-soft-red-2);
  border-radius: 24px;
  padding: 36px 32px;
  box-shadow: 0 30px 80px rgba(153,27,27,0.12);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.award-top {
  display: flex;
  align-items: center;
  gap: 12px;
}

.badge {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-warm-mix);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 16px;
}

.award-card h4 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
}

.award-card h4 span {
  color: var(--primary-1);
}

.award-card p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-muted);
}

.award-link {
  margin-top: auto;
  font-weight: 600;
  color: var(--primary-1);
  text-decoration: none;
}

.award-link:hover {
  text-decoration: underline;
}

/* Awards responsive */
@media (max-width: 900px) {
  .awards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .awards-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------------- FEATURE SECTION ---------------- */
.feature-section {
  padding: 120px 20px;
  background: var(--bg-warm-green);
}

.feature-wrapper {
  width: 90vw;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 60px;
}

.feature-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.feature-visual::before {
  content: '';
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, #e0f2fe 0%, transparent 70%);
  z-index: -1;
}

.feature-visual img {
  width: 320px;
  border-radius: 36px;
  box-shadow: 0 40px 100px rgba(15,23,42,0.15);
}

.feature-label {
  color: var(--primary-1);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.04em;
}

.feature-content h2 {
  margin-top: 12px;
  font-size: 36px;
  font-weight: 800;
  line-height: 1.2;
}

.feature-content p {
  margin-top: 18px;
  max-width: 480px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-muted);
}

.feature-link {
  display: inline-block;
  margin-top: 28px;
  font-weight: 600;
  color: var(--primary-1);
  text-decoration: none;
}

.feature-link:hover {
  text-decoration: underline;
}

/* Feature responsive */
@media (max-width: 900px) {
  .feature-wrapper {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .feature-content p {
    margin-left: auto;
    margin-right: auto;
  }
}

/* ---------------- WALLET SECTION ---------------- */
.wallet-section {
  padding: 120px 20px;
  background: var(--bg-warm-green);
}

.wallet-wrapper {
  width: 90vw;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 60px;
}

.wallet-content h2 {
  margin-top: 12px;
  font-size: 36px;
  font-weight: 800;
  line-height: 1.2;
}

.wallet-content p {
  margin-top: 18px;
  max-width: 480px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-muted);
}

.wallet-label {
  color: var(--primary-1);
  font-weight: 600;
  font-size: 14px;
}

.wallet-link {
  display: inline-block;
  margin-top: 28px;
  font-weight: 600;
  color: var(--primary-1);
  text-decoration: none;
}

.wallet-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.wallet-visual::before {
  content: '';
  position: absolute;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: radial-gradient(circle, #fde7f3 0%, transparent 70%);
  z-index: -1;
}

.wallet-visual img {
  width: 360px;
  border-radius: 36px;
  box-shadow: 0 40px 100px rgba(15,23,42,0.15);
}

@media (max-width: 900px) {
  .wallet-wrapper {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .wallet-content p {
    margin-left: auto;
    margin-right: auto;
  }
}

/* ---------------- HOW IT WORKS ---------------- */
.how-section {
  padding: 120px 20px;
  background: var(--bg-warm-green);
}

.how-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 80px;
}

.how-header h2 {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.how-header p {
  margin-top: 16px;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-muted);
}

.how-grid {
  width: 90vw;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  text-align: center;
}

.how-card {
  padding: 32px 24px;
}

.how-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 24px;
  border-radius: 20px;
  background: #f5f3ff;
  color: var(--primary-1);
  display: grid;
  place-items: center;
  font-size: 28px;
}

.how-card h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}

.how-card p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-muted);
}

@media (max-width: 900px) {
  .how-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

/* ---------------- DOWNLOAD CTA ---------------- */
.download-section {
  padding: 120px 20px;
}

.download-wrapper {
  width: 90vw;
  margin: 0 auto;
  padding: 32px 56px 0; /* shorter card */
  border-radius: 32px;
  background: var(--bg-warm-mix);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: stretch;
  gap: 60px;
  overflow: hidden; /* clip half phones */
}

.download-label {
  color: var(--primary-1);
  font-weight: 600;
  font-size: 14px;
}

.download-content h2 {
  margin-top: 14px;
  font-size: 36px;
  font-weight: 800;
  line-height: 1.2;
}

.download-content p {
  margin-top: 18px;
  
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-muted);
}

.store-buttons {
  margin-top: 32px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.store-btn {
  display: flex;
  flex-direction: column;
  padding: 14px 22px;
  border-radius: 14px;
  text-decoration: none;
  font-weight: 600;
  line-height: 1.2;
}

.store-btn span {
  font-size: 12px;
  font-weight: 500;
  opacity: 0.85;
}

.store-btn strong {
  font-size: 16px;
}

.store-btn.google {
  background: #E81F22;
  color: var(--text-invert);
  box-shadow: 0 6px 16px rgba(232,31,34,0.35);
  transition: background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.store-btn.google:hover {
  background: #c81c1f;
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(232,31,34,0.45);
}

.download-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: flex-end; /* stick to bottom */
  gap: 24px;
  height: 260px; /* MORE SHORT */
}

.download-visual img {
  width: 220px;
  height: 420px;
  border-radius: 32px;
  box-shadow: 0 40px 100px rgba(15,23,42,0.18);
   /* show HALF, touch bottom */
}

.download-visual img:last-child {
  margin-bottom: 0;
}

@media (max-width: 900px) {
  .download-wrapper {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 60px 30px 0;
  }

  .download-content p {
    margin-left: auto;
    margin-right: auto;
  }

  .download-visual {
    margin-top: 40px;
    height: 460px;
  }

  .download-visual img {
    width: 220px;
    height: 460px;
  }
}

  .download-content p {
    margin-left: auto;
    margin-right: auto;
  }

  .download-visual {
    margin-top: 40px;
  }
}

/* ---------------- TESTIMONIALS ---------------- */
.testimonial-section {
  padding: 140px 20px;
  background: #eaf6ff;
}

.testimonial-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 80px;
}

.testimonial-header h2 {
  font-size: 36px;
  font-weight: 800;
}

.testimonial-header p {
  margin-top: 16px;
  color: var(--text-muted);
}

.testimonial-grid {
  width: 90vw;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.testimonial-card {
  background: var(--bg-soft-red-2);
  padding: 32px 28px;
  border-radius: 24px;
  box-shadow: 0 30px 80px rgba(153,27,27,0.12);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.testimonial-card p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-dark);
}

.client {
  display: flex;
  align-items: center;
  gap: 14px;
}

.client img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
}

.client span {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
}

@media (max-width: 900px) {
  .testimonial-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------------- FAQ ---------------- */
.faq-section {
  padding: 140px 20px;
  background: var(--bg-warm-green);
}

.faq-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 80px;
}

.faq-header h2 {
  font-size: 36px;
  font-weight: 800;
}

.faq-header p {
  margin-top: 16px;
  color: var(--text-muted);
}

.faq-wrapper {
  width: 90vw;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}

.faq-box {
  background: var(--bg-soft-red-2);
  border-radius: 24px;
  padding: 40px 36px;
  box-shadow: 0 30px 80px rgba(153,27,27,0.12);
}

.faq-item + .faq-item {
  margin-top: 36px;
}

.faq-item h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.faq-item p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-muted);
}

@media (max-width: 900px) {
  .faq-wrapper {
    grid-template-columns: 1fr;
  }
}

/* ---------------- PRICING ---------------- */
.pricing-section {
  padding: 10px 20px;
  padding-bottom: 10px;
  background: var(--bg-warm-green);
}

.pricing-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 80px;
}

.pricing-header h2 {
  font-size: 36px;
  font-weight: 800;
}

.pricing-header p {
  margin-top: 16px;
  color: var(--text-muted);
}

.pricing-grid {
  width: 90vw;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.price-card {
  padding: 18px 18px 18px;
  border-radius: 28px;
  background: var(--bg-soft-red-2);
  box-shadow: 0 30px 80px rgba(153,27,27,0.12);
/*  text-align: center;*/
}

.price-card:hover {
  border: 2px solid var(--primary-1);
}


.price {
  font-size: 32px;
  font-weight: 800;
  margin: 16px 0 24px;
}

.price span {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-muted);
}

.price-card ul {
  list-style: none;
  padding: 0;
  margin: 0 0 32px;
}

.price-card li {
  margin: 12px 0;
  color: var(--text-muted);
}

.price-btn {
  display: inline-block;
  padding: 8px 18px;
  border-radius: 999px;
  background: #E81F22;
  color: var(--text-invert);
  text-decoration: none;
  font-size: 14px;
  font-weight: 400;
  box-shadow: 0 6px 16px rgba(232,31,34,0.35);
  transition: background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.price-btn:hover {
  background: #c81c1f;
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(232,31,34,0.45);
}

@media (max-width: 900px) {
  .pricing-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------------- TRUSTED BY ---------------- */
.trusted-wrapper {
  width: 90vw;
  margin: 0 auto;
  padding: 40px 32px;
  border-radius: 24px;
  background: var(--bg-warm-mix);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.trusted-wrapper img {
  max-height: 36px;
/*  opacity: 0.7;*/
/*  filter: grayscale(100%);*/
  transition: all 0.3s ease;
}

.trusted-wrapper img:hover {
  opacity: 1;
  filter: grayscale(0%);
}

@media (max-width: 900px) {
  .trusted-wrapper {
    justify-content: center;
  }
}

/* ---------------- HELP SECTION ---------------- */
.help-section {
  padding: 140px 20px;
  background: var(--bg-warm-green);
}

.help-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 80px;
}

.help-header h2 {
  font-size: 36px;
  font-weight: 800;
}

.help-header p {
  margin-top: 16px;
  color: var(--text-muted);
}

.help-wrapper {
  width: 90vw;
  margin: 0 auto;
  display: flex;
  justify-content: center;
}

.help-form {
  width: 100%;
  max-width: 760px;
  background: var(--bg-warm-green);
  padding: 48px 44px;
  border-radius: 24px;
  box-shadow: 0 30px 80px rgba(15,23,42,0.08);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 14px;
  font-weight: 600;
}

.form-group input,
.form-group textarea {
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid #e2e8f0;
  font-family: inherit;
  font-size: 14px;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-1);
}

.help-btn {
  margin-top: 24px;
  padding: 14px 36px;
  border-radius: 999px;
  border: none;
  background: #E81F22;
  color: var(--text-invert);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(232,31,34,0.35);
  transition: background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.help-btn:hover {
  background: #c81c1f;
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(232,31,34,0.45);
}

@media (max-width: 900px) {
  .form-row {
    grid-template-columns: 1fr;
  }

  .help-form {
    padding: 36px 28px;
  }
}

/* ---------------- ARTICLES ---------------- */
.articles-section {
  padding: 140px 20px;
  background: var(--bg-warm-green);
}

.articles-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 80px;
}

.articles-header h2 {
  font-size: 36px;
  font-weight: 800;
}

.articles-header p {
  margin-top: 16px;
  color: var(--text-muted);
}

.articles-grid {
  width: 90vw;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 32px;
}

.article-left {
  display: grid;
  grid-template-rows: 1fr 1fr;
  gap: 32px;
}

.article-card {
  position: relative;
  border-radius: 24px;
  background-size: cover;
  background-position: center;
  overflow: hidden;
  min-height: 240px;
}

.article-card.large {
  min-height: 280px;
}

.article-card.tall {
  min-height: 100%;
}

.article-overlay {
  position: absolute;
  inset: 0;
  background: var(--bg-warm-mix);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: #ffffff;
}

.article-overlay h3 {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
}

.article-overlay span {
  margin-top: 10px;
  font-size: 14px;
  opacity: 0.9;
}

@media (max-width: 900px) {
  .articles-grid {
    grid-template-columns: 1fr;
  }

  .article-card.tall {
    min-height: 260px;
  }
}

/* ---------------- FOOTER ---------------- */
.footer-section {
  background: #eaf6ff;
  padding: 100px 20px 0;
}

.footer-wrapper {
  width: 90vw;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 60px;
}

.footer-logo {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary-1);
}

.footer-logo span {
  color: var(--primary-2);
}

.footer-logo span {
  color: var(--primary-1);
}

.footer-brand p {
  margin-top: 16px;
  max-width: 320px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-muted);
}

.footer-socials {
  margin-top: 20px;
  display: flex;
  gap: 12px;
}

.footer-socials a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--bg-warm-green);
  box-shadow: 0 10px 20px rgba(15,23,42,0.08);
  text-decoration: none;
}

.footer-links h4,
.footer-newsletter h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-links a {
  display: block;
  margin-bottom: 12px;
  font-size: 14px;
  text-decoration: none;
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--text-dark);
}

.footer-newsletter p {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.newsletter-box {
  display: flex;
  background: var(--bg-warm-green);
  border-radius: 999px;
  padding: 6px;
  box-shadow: 0 10px 30px rgba(15,23,42,0.08);
}

.newsletter-box input {
  flex: 1;
  border: none;
  outline: none;
  padding: 10px 14px;
  font-size: 14px;
  background: transparent;
}

.newsletter-box button {
  border: none;
  background: var(--bg-warm-mix);
  color: #fff;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
}

.footer-bottom {
  border-top: 1px solid #dbeafe;
  text-align: center;
  padding: 24px 20px;
  font-size: 14px;
  color: var(--text-muted);
}

@media (max-width: 900px) {
  .footer-wrapper {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-brand p {
    margin-left: auto;
    margin-right: auto;
  }

  .footer-socials {
    justify-content: center;
  }
}

/* ---------------- BACK TO TOP ---------------- */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  border: none;
  background: #E81F22;
  color: var(--text-invert);
  font-size: 20px;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(232,31,34,0.45);
  transition: opacity 0.3s ease, transform 0.3s ease, box-shadow 0.25s ease;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
}

.back-to-top.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover {
  background: #c81c1f;
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(232,31,34,0.55);
}