* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
}


body,
html {
  height: 100%;
}

.layout-shell {
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.content-row {
  flex: 1 1 auto;
  display: flex;
  min-height: 0;
}

.scroll-panel {
  background: linear-gradient(120deg, #e3f2fd 0%, #f5f5f5 100%);
  flex: 1 1 auto;
  min-width: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 0 0 30% 0;
}

.top-banner,
.bottom-banner {
  min-height: 90px;
  max-height: 250px;
  background: #f2f2f2;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
}

.ad-space {
  background: #ddd;
  color: #333;
  border: 1px dashed #888;
  width: 95%;
  height: 80%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #0066cc;
  color: #fff;
  padding: 10px 20px;
}

.nav-links {
  display: flex;
  gap: 15px;
}

.nav-links a {
  text-decoration: none;
  color: white;
  font-size: 14px;
  transition: color 0.3s;
}

.nav-links a:hover {
  color: #010056;
}

.hamburger {
  display: none;
  font-size: 22px;
  cursor: pointer;
}

.main-container {
  display: none;
}

.left-banner {
  min-width: 160px;
  max-width: 300px;
  background: #f2f2f2;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  flex-shrink: 0;
}

.bmi-tool-section {
  flex: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  align-items: flex-start;
  padding: 40px 24px 80px 24px;
  background: linear-gradient(120deg, #e3f2fd 0%, #f5f5f5 100%);
}

.bmi-card {
  background: none;
  border-radius: 0;
  box-shadow: none;
  padding: 0;
  max-width: auto;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  margin-right: 32px;
}

.bmi-title {
  color: #0066cc;
  font-size: 2.2rem;
  font-weight: 600;
  margin-bottom: 18px;
  letter-spacing: 1px;
}

.bmi-title-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
  position: relative;
}

.bmi-info-trigger {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid #0066cc;
  background: radial-gradient(circle at 30% 30%, #ffffff 0%, #e3f2fd 70%);
  color: #0066cc;
  font-weight: 700;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
  transition: transform .35s cubic-bezier(.42, 0, .58, 1), box-shadow .35s, background .4s;
  position: relative;
}

.bmi-info-trigger:hover,
.bmi-info-trigger:focus-visible {
  transform: translateY(-3px) scale(1.06);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
  outline: none;
}

.bmi-info-trigger:active {
  transform: scale(.95);
}

.bmi-info-flyout {
  position: absolute;
  top: 55px;
  left: 0;
  z-index: 50;
  background: #ffffffee;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid #c5d8e6;
  border-radius: 18px;
  padding: 18px 20px 16px 20px;
  width: min(520px, 84vw);
  box-shadow: 0 10px 36px rgba(0, 0, 0, 0.15);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px) scale(.98);
  transition: opacity .5s cubic-bezier(.42, 0, .58, 1), transform .55s cubic-bezier(.42, 0, .58, 1);
}

.bmi-info-flyout h2 {
  font-size: 1.2rem;
  color: #0066cc;
  margin-bottom: 6px;
}

.bmi-info-flyout p {
  font-size: .95rem;
  color: #222;
  line-height: 1.35;
  margin-bottom: 10px;
}

.bmi-info-flyout .bmi-categories-inline {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin: 0 0 30% 0;
  padding: 0;
}

.bmi-info-flyout .bmi-categories-inline li {
  font-size: .82rem;
  display: flex;
  align-items: center;
  gap: 4px;
}

.bmi-info-flyout .bmi-disclaimer {
  font-size: .7rem;
  letter-spacing: .5px;
  color: #444;
  text-transform: uppercase;
  opacity: .8;
}

.bmi-title-row:hover .bmi-info-flyout,
.bmi-info-trigger:focus+.bmi-info-flyout,
.bmi-info-trigger:focus-visible+.bmi-info-flyout {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

@media (max-width: 700px) {
  .bmi-info-flyout {
    left: 0;
    width: 100%;
  }

  .bmi-title-row {
    flex-wrap: wrap;
  }
}

.bmi-form {
  width: 100%;
  max-width: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: #e3f2fd;
  border-radius: 14px;
  padding: 18px 16px 14px 16px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-group label {
  font-size: 1rem;
  color: #333;
  font-weight: 500;
  margin-bottom: 2px;
}

.input-row {
  display: flex;
  gap: 8px;
}

.input-row input[type="number"] {
  flex: 1;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1.5px solid #b0bec5;
  font-size: 1rem;
  background: #f7fafd;
  color: #222;
  transition: border 0.3s;
}

.input-row input[type="number"]:focus {
  border: 1.5px solid #0066cc;
}

.input-row select {
  padding: 8px 10px;
  border-radius: 8px;
  border: 1.5px solid #b0bec5;
  background: #e3f2fd;
  color: #222;
  font-size: 1rem;
  transition: border 0.3s;
}

.input-row select:focus {
  border: 1.5px solid #0066cc;
}

.bmi-btn {
  margin-top: 10px;
  padding: 10px 0;
  background: linear-gradient(90deg, #0066cc 60%, #333 100%);
  color: #fff;
  font-size: 1.1rem;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: background 0.3s, transform 0.2s;
}

.bmi-btn:hover {
  background: linear-gradient(90deg, #004080 60%, #111 100%);
  transform: translateY(-2px) scale(1.03);
}


.bmi-result-container {
  margin-top: 0;
  width: 100%;
  background: linear-gradient(140deg, #f0f7ff 0%, #ffffff 100%);
  border-radius: 16px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  padding: 18px 16px 16px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  opacity: 0;
  transform: scale(0.95) translateY(40px);
  pointer-events: none;
  transition: opacity 0.7s cubic-bezier(.42, 0, .58, 1), transform 0.7s cubic-bezier(.42, 0, .58, 1);
}

.bmi-result-container.show {
  opacity: 1;
  transform: scale(1) translateY(0);
  pointer-events: auto;
  animation: popResult 1.1s cubic-bezier(.42, 0, .58, 1);
}

.bmi-result {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 18px;
  width: 100%;
}

.bmi-value {
  font-size: 2.4rem;
  font-weight: 800;
  color: #222;
  margin-bottom: 6px;
  letter-spacing: 2px;
  animation: fadeInNum 1.2s cubic-bezier(.42, 0, .58, 1);
}

.bmi-category {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
  padding: 4px 18px;
  border-radius: 16px;
  background: #e3f2fd;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.07);
  animation: fadeInCat 1.2s cubic-bezier(.42, 0, .58, 1);
}

.bmi-progress-bar {
  width: 100%;
  height: 16px;
  background: #cfd8dc;
  border-radius: 11px;
  overflow: hidden;
  margin-bottom: 12px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
  position: relative;
}

.bmi-progress {
  height: 100%;
  width: 0;
  border-radius: 11px;
  background: #2196f3;
  transition: width 1.2s cubic-bezier(.42, 0, .58, 1), background 0.3s;
  position: absolute;
  left: 0;
  top: 0;
}

.bmi-progress-bar::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  height: 100%;
  width: 8px;
  background: linear-gradient(90deg, rgba(0, 0, 0, 0.04), rgba(0, 0, 0, 0));
}

.bmi-tips {
  font-size: .9rem;
  color: #333;
  margin-top: 10px;
  text-align: center;
  font-style: italic;
  animation: fadeInTips 1.3s cubic-bezier(.42, 0, .58, 1);
}

.bmi-interaction-row {
  width: 100%;
  display: flex;
  align-items: flex-start;
  gap: 26px;
  flex-wrap: wrap;
}

.bmi-interaction-row>* {
  flex: 1 1 auto;
}

@media (min-width: 901px) {
  .bmi-interaction-row {
    flex-wrap: nowrap;
  }

  .bmi-form {
    flex: 0 0 auto;
  }

  .bmi-result-container {
    flex: 0 0 auto;
  }
}

@media (max-width: 700px) {
  .bmi-form {
    max-width: 100%;
  }

  .bmi-result-container {
    max-width: 100%;
  }

  .bmi-interaction-row {
    flex-direction: column;
  }
}

@keyframes popResult {
  0% {
    opacity: 0;
    transform: scale(0.8) translateY(60px);
  }

  60% {
    opacity: 1;
    transform: scale(1.05) translateY(-8px);
  }

  100% {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@keyframes fadeInNum {
  from {
    opacity: 0;
    transform: scale(0.8);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes fadeInCat {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInTips {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.bmi-cat {
  display: inline-block;
  min-width: 90px;
  font-weight: 600;
  border-radius: 6px;
  padding: 2px 8px;
  margin-right: 8px;
  font-size: 1rem;
}

.bmi-cat.under {
  background: #e3f2fd;
  color: #2196f3;
}

.bmi-cat.normal {
  background: #e8f5e9;
  color: #4caf50;
}

.bmi-cat.over {
  background: #fff3e0;
  color: #ff9800;
}

.bmi-cat.obese {
  background: #ffebee;
  color: #f44336;
}

@media (max-width: 1200px) {
  .bmi-tool-section {
    flex-direction: column;
    align-items: center;
    gap: 24px;
  }
}

@media (max-width: 850px) {
  .left-banner {
    display: none;
  }

  .right-banner {
    display: none;
  }

  .bmi-tool-section {
    padding: 18px 4px;
  }

  .bmi-card {
    margin-right: 0;
  }
}

@media (max-width: 700px) {

  .bmi-card,
  .bmi-info-card {
    max-width: 98vw;
    padding: 18px 6vw 12px 6vw;
  }

  .bmi-title {
    font-size: 1.5rem;
  }
}

@media (max-width: 1000px) {
  .cards-container {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 700px) {
  .cards-container {
    grid-template-columns: 1fr;
  }
}

/* Hide left banner on mobile (below 850px) */
@media (max-width: 850px) {
  .left-banner {
    display: none;
  }
}

/* Show bottom banner on mobile (below 850px) */
@media (max-width: 849px) {
  .bottom-banner {
    display: flex;
  }
}

/* Hide bottom banner on desktop (850px and above) */
@media (min-width: 850px) {
  .bottom-banner {
    display: none;
  }
}

@media (max-width: 850px) {
  .hamburger {
    display: block;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    gap: 10px;
    background: #0066cc;
    position: absolute;
    top: 150px;
    width: 26vh;
    padding: 10px 0 0 5px;
    z-index: 100;
  }

  .nav-links.active {
    display: flex;
  }
}