:root {
  /* Color Variables */
  --primary-color: #4DB6AC;
  --primary-dark: #00867d;
  --primary-light: #82e9de;
  --secondary-color: #1A237E;
  --secondary-dark: #000051;
  --secondary-light: #534bae;
  --accent-color: #FF5252;
  --accent-dark: #c50e29;
  --accent-light: #ff867f;
  --dark-blue: #0D47A1;
  --light-blue: #64B5F6;
  --bg-color: #FAFAFA;
  --card-bg: #FFFFFF;
  --dark-bg: #121212;
  --text-primary: #212121;
  --text-secondary: #757575;
  --text-tertiary: #9E9E9E;
  --text-light: #FFFFFF;
  --border-color: #E0E0E0;
  --success-color: #66BB6A;
  --warning-color: #FFA726;
  --error-color: #EF5350;
  --info-color: #42A5F5;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
  --shadow-md: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
  --shadow-lg: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
  --shadow-xl: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22);
  
  /* Typography */
  --font-primary: 'Exo 2', sans-serif;
  --font-secondary: 'Roboto', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 2rem;
  --radius-circle: 50%;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Z-index layers */
  --z-header: 100;
  --z-modal: 200;
  --z-tooltip: 300;
}

/* Reset & Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 62.5%; /* 10px base for easy rem calculation */
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-secondary);
  font-size: 1.6rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-color);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul {
  list-style: none;
}

a {
  text-decoration: none;
  color: var(--primary-color);
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-dark);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 4.2rem;
  letter-spacing: -0.5px;
}

h2 {
  font-size: 3.6rem;
  letter-spacing: -0.3px;
}

h3 {
  font-size: 2.4rem;
}

h4 {
  font-size: 2rem;
}

p {
  margin-bottom: var(--spacing-md);
}

button {
  font-family: var(--font-primary);
  border: none;
  background: none;
  cursor: pointer;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header & Navigation */
.main-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  z-index: var(--z-header);
  transition: all var(--transition-normal);
}

.main-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 8rem;
}

.logo {
  display: flex;
  align-items: center;
  font-family: var(--font-primary);
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--secondary-color);
}

.logo-svg {
  margin-right: var(--spacing-sm);
}

.main-nav ul {
  display: flex;
  gap: var(--spacing-xl);
}

.main-nav a {
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 1.6rem;
  font-weight: 500;
  padding: var(--spacing-sm) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: width var(--transition-normal);
}

.main-nav a:hover {
  color: var(--primary-color);
}

.main-nav a:hover::after,
.main-nav a.active::after {
  width: 100%;
}

.cta-button {
  background-color: var(--primary-color);
  color: var(--text-light) !important;
  padding: var(--spacing-sm) var(--spacing-lg) !important;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.cta-button:hover {
  background-color: var(--primary-dark);
}

.cta-button::after {
  display: none;
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
  display: block;
  width: 30px;
  height: 3px;
  background-color: var(--text-primary);
  transition: all var(--transition-fast);
}

/* Hamburger menu icon animation */
.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* Hamburger menu icon animation */
.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* Hero Section */
.hero-section {
  position: relative;
  padding: 22rem 0 10rem; /* Increased top padding from 16rem to 22rem to create more space */
  background: linear-gradient(135deg, #F5F7FA 0%, #E4EDF9 100%);
  overflow: hidden;
}

.hero-content {
  max-width: 55%;
  position: relative;
  z-index: 2;
}

.hero-content h1 {
  font-size: 5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  line-height: 1.2;
}

.highlight {
  color: var(--primary-color);
  position: relative;
}

.hero-subtitle {
  font-size: 2rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  max-width: 90%;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.primary-button {
  display: inline-block;
  background-color: var(--primary-color);
  color: var(--text-light);
  font-family: var(--font-primary);
  font-weight: 500;
  font-size: 1.6rem;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.primary-button:hover {
  background-color: var(--primary-dark);
  color: var(--text-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.secondary-button {
  display: inline-block;
  background-color: transparent;
  color: var(--primary-color);
  font-family: var(--font-primary);
  font-weight: 500;
  font-size: 1.6rem;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-md);
  border: 2px solid var(--primary-color);
  transition: all var(--transition-fast);
  text-align: center;
}

.secondary-button:hover {
  background-color: rgba(77, 182, 172, 0.1);
  color: var(--primary-dark);
  border-color: var(--primary-dark);
}

.hero-device {
  position: absolute;
  top: 50%;
  right: 10%;
  transform: translateY(-50%);
  width: 300px;
  z-index: 3;
}

.device-container {
  position: relative;
}

.device-outline {
  position: relative;
  width: 100%;
  height: 400px;
  background-color: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  padding: var(--spacing-sm);
}

.device-screen {
  width: 100%;
  height: 320px;
  background-color: #000;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
}

.screen-content {
  width: 100%;
  height: 100%;
  padding: var(--spacing-md);
  color: var(--text-light);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.device-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.2rem;
}

.device-status {
  color: var(--success-color);
}

.device-battery {
  width: 30px;
  height: 14px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 3px;
  position: relative;
  padding: 1px;
}

.battery-level {
  height: 100%;
  width: 80%;
  background-color: var(--success-color);
  border-radius: 1px;
}

.vital-display {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.vital-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: var(--spacing-sm);
}

.vital-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  background-color: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-circle);
}

.vital-icon svg {
  width: 16px;
  height: 16px;
  stroke: var(--text-light);
}

.vital-data {
  display: flex;
  flex-direction: column;
}

.vital-label {
  font-size: 1.2rem;
  opacity: 0.8;
}

.vital-value {
  font-size: 1.8rem;
  font-weight: 600;
}

.vital-unit {
  font-size: 1.2rem;
  opacity: 0.7;
}

.vital-graph {
  flex-grow: 1;
  height: 30px;
  overflow: hidden;
}

.graph {
  width: 100%;
  height: 100%;
}

.o2-level {
  height: 6px;
  background: linear-gradient(90deg, var(--info-color), var(--primary-color));
  border-radius: var(--radius-circle);
}

.voc-display {
  margin-top: var(--spacing-sm);
}

.voc-display h4 {
  font-size: 1.4rem;
  margin-bottom: var(--spacing-sm);
  opacity: 0.9;
}

.voc-levels {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-sm);
}

.voc-bar-container {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.voc-bar {
  width: 100%;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
}

.voc-bar::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: var(--primary-color);
  animation: vocLevel 4s infinite alternate;
}

#voc1::after {
  height: 40%;
  background-color: var(--primary-color);
  animation-delay: 0s;
}

#voc2::after {
  height: 25%;
  background-color: var(--info-color);
  animation-delay: 0.5s;
}

#voc3::after {
  height: 65%;
  background-color: var(--warning-color);
  animation-delay: 1s;
}

.voc-label {
  font-size: 1rem;
  opacity: 0.8;
}

.behavior-display {
  margin-top: var(--spacing-sm);
}

.behavior-display h4 {
  font-size: 1.4rem;
  margin-bottom: var(--spacing-sm);
  opacity: 0.9;
}

.activity-status {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.activity-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  background-color: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-circle);
}

.activity-icon svg {
  width: 16px;
  height: 16px;
  stroke: var(--success-color);
}

.activity-label {
  font-size: 1.4rem;
  font-weight: 500;
}

.activity-time {
  margin-left: auto;
  font-size: 1.2rem;
  opacity: 0.8;
}

.activity-graph {
  height: 20px;
  width: 100%;
}

.device-button {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-circle);
}

.device-sensors {
  position: absolute;
  top: 340px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 4px;
  background-color: rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-circle);
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.particles-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.hero-wave {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 150px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 320'%3E%3Cpath fill='%23ffffff' fill-opacity='1' d='M0,288L48,272C96,256,192,224,288,213.3C384,203,480,213,576,229.3C672,245,768,267,864,261.3C960,256,1056,224,1152,208C1248,192,1344,192,1392,192L1440,192L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z'%3E%3C/path%3E%3C/svg%3E");
  background-size: cover;
  background-repeat: no-repeat;
}

/* Features Section */
.features-section {
  padding: var(--spacing-xxl) 0;
  background-color: var(--card-bg);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xxl);
}

.section-header h2 {
  color: var(--text-primary);
  position: relative;
  display: inline-block;
  margin-bottom: var(--spacing-md);
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background-color: var(--primary-color);
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.8rem;
  max-width: 600px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.feature-card {
  background-color: var(--bg-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  background-color: rgba(77, 182, 172, 0.1);
  border-radius: var(--radius-circle);
  margin-bottom: var(--spacing-md);
}

.feature-icon svg {
  width: 30px;
  height: 30px;
  stroke: var(--primary-color);
}

.feature-card h3 {
  font-size: 2rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 1.5rem;
  margin-bottom: 0;
}

/* Device Section */
.device-section {
  padding: var(--spacing-xxl) 0;
  background-color: var(--bg-color);
}

/* Publications Section */
.publications-section {
  padding: var(--spacing-xxl) 0;
  background-color: var(--card-bg);
}

.publications-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.publication-card {
  background-color: var(--bg-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.publication-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.publication-year {
  position: absolute;
  top: 0;
  right: 0;
  background-color: var(--primary-color);
  color: var(--text-light);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 0 var(--radius-md) 0 var(--radius-md);
  font-weight: 600;
}

.publication-title {
  font-size: 1.8rem;
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
}

.publication-authors {
  font-size: 1.4rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  font-style: italic;
}

.publication-journal {
  font-size: 1.4rem;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  font-weight: 500;
}

.publication-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.tag {
  background-color: rgba(77, 182, 172, 0.1);
  color: var(--primary-color);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: 1.2rem;
}

.publication-link {
  margin-top: auto;
  align-self: flex-start;
  color: var(--primary-color);
  font-weight: 500;
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
}

.publication-link:hover {
  color: var(--primary-dark);
}

.publication-link::after {
  content: "→";
  margin-left: var(--spacing-xs);
  transition: transform var(--transition-fast);
}

.publication-link:hover::after {
  transform: translateX(4px);
}

/* Funding Section */
.funding-section {
  padding: var(--spacing-xxl) 0;
  background-color: var(--bg-color);
}

.funding-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.funding-partners, .grant-info, .funding-cta {
  background-color: var(--card-bg);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
}

.funding-partners h3, .grant-info h3, .funding-cta h3 {
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
  font-size: 2rem;
}

.partner-logos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--spacing-lg);
  text-align: center;
}

.partner-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo-placeholder {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-circle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 2rem;
  color: var(--text-light);
}

.nih {
  background-color: #0072ce;
}

.nsf {
  background-color: #1e88e5;
}

.eu {
  background-color: #0052a5;
}

.gates {
  background-color: #b53d00;
}

.partner-logo p {
  font-size: 1.4rem;
  color: var(--text-secondary);
}

.grants-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.grant-item {
  border-left: 3px solid var(--primary-color);
  padding-left: var(--spacing-md);
}

.grant-item h4 {
  font-size: 1.6rem;
  margin-bottom: var(--spacing-xs);
}

.grant-details, .grant-period {
  font-size: 1.4rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.grant-amount {
  font-size: 1.6rem;
  color: var(--primary-color);
  font-weight: 600;
}

.funding-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.funding-cta p {
  margin-bottom: var(--spacing-lg);
  font-size: 1.6rem;
  color: var(--text-secondary);
}

.device-showcase {
  display: flex;
  gap: var(--spacing-xxl);
  align-items: center;
}

.device-visual {
  flex: 1;
  display: flex;
  justify-content: center;
}

.device-model {
  width: 300px;
  height: 500px;
  background-color: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  position: relative;
}

.device-screen-interactive {
  flex-grow: 1;
  background-color: #000;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
}

.screen-display {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  padding: var(--spacing-md);
  color: var(--text-light);
  display: none;
  flex-direction: column;
  gap: var(--spacing-md);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.screen-display.active {
  display: flex;
  opacity: 1;
}

.screen-display h3 {
  font-size: 1.8rem;
  text-align: center;
  margin-bottom: var(--spacing-md);
}

.interactive-vitals {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  height: 100%;
}

.vital-metric {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

.ecg-monitor {
  width: 100%;
  height: 80px;
  margin-bottom: var(--spacing-sm);
}

.metric-label {
  font-size: 1.4rem;
  color: rgba(255, 255, 255, 0.7);
}

.metric-value {
  font-size: 1.8rem;
  font-weight: 600;
}

.circular-progress {
  position: relative;
  width: 100px;
  height: 100px;
}

.circular-progress svg {
  transform: rotate(-90deg);
}

.circular-value {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 2rem;
  font-weight: 600;
}

.temp-gauge {
  width: 100%;
  padding: 0 var(--spacing-md);
}

.temp-bar {
  width: 100%;
  height: 12px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-circle);
  margin-bottom: var(--spacing-xs);
  position: relative;
  overflow: hidden;
}

.temp-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 45%;
  background: linear-gradient(90deg, #42A5F5, #FF5252);
  border-radius: var(--radius-circle);
}

.temp-markers {
  display: flex;
  justify-content: space-between;
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.6);
}

.voc-visualization {
  height: 250px;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.voc-chart {
  flex-grow: 1;
}

.voc-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
}

.voc-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.voc-color {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-circle);
}

.voc-name {
  font-size: 1.2rem;
}

.voc-reading {
  text-align: center;
  margin-top: var(--spacing-md);
}

.reading-label {
  font-size: 1.4rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--spacing-xs);
}

.reading-value {
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.indicator-bar {
  width: 100%;
  height: 8px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-circle);
  margin-bottom: var(--spacing-xs);
  position: relative;
  overflow: hidden;
}

.indicator-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--success-color), var(--warning-color), var(--error-color));
  border-radius: var(--radius-circle);
}

.indicator-labels {
  display: flex;
  justify-content: space-between;
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.6);
}

.behavior-visualization {
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  justify-content: space-between;
}

.activity-breakdown {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

.activity-ring {
  position: relative;
  width: 150px;
  height: 150px;
}

.ring-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.ring-center span:first-child {
  font-size: 2rem;
  font-weight: 600;
}

.ring-center span:last-child {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.7);
}

.activity-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  justify-content: center;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-right: var(--spacing-sm);
}

.legend-color {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-circle);
}

.legend-label {
  font-size: 1.2rem;
  min-width: 70px;
}

.legend-value {
  font-size: 1.2rem;
  font-weight: 500;
}

.gait-analysis {
  text-align: center;
}

.gait-analysis h4 {
  font-size: 1.6rem;
  margin-bottom: var(--spacing-sm);
}

.gait-pattern {
  width: 100%;
  height: 60px;
  margin-bottom: var(--spacing-sm);
}

.gait-metrics {
  display: flex;
  justify-content: space-around;
}

.gait-metric {
  text-align: center;
}

.metric-name {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.7);
}

.device-controls {
  display: flex;
  justify-content: space-around;
  margin-top: var(--spacing-md);
}

.device-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1.4rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.device-btn:hover, .device-btn.active {
  background-color: var(--primary-color);
  color: var(--text-light);
  border-color: var(--primary-color);
}

.device-info {
  flex: 1;
}

.info-tabs {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.tab-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--text-secondary);
  background-color: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--primary-color);
}

.tab-btn.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.spec-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.spec-list li {
  display: flex;
  justify-content: space-between;
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--border-color);
}

.spec-label {
  font-weight: 500;
  color: var(--text-primary);
}

.spec-value {
  color: var(--text-secondary);
}

.sensor-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.sensor-list li {
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--border-color);
}

.sensor-name {
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.sensor-desc {
  font-size: 1.4rem;
  color: var(--text-secondary);
}

.tech-highlights {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.tech-item {
  padding: var(--spacing-md);
  background-color: var(--card-bg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.tech-item h4 {
  font-size: 1.6rem;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.tech-item p {
  font-size: 1.4rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* Data Section */
.data-section {
  padding: var(--spacing-xxl) 0;
  background-color: var(--card-bg);
}

.data-visualizations {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xxl);
}

.data-panel {
  background-color: var(--bg-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) var(--spacing-xl);
  background-color: var(--primary-color);
  color: var(--text-light);
}

.panel-header h3 {
  margin-bottom: 0;
  font-size: 2rem;
}

.panel-controls {
  display: flex;
  gap: var(--spacing-sm);
}

.time-control {
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-sm);
  background-color: rgba(255, 255, 255, 0.2);
  color: var(--text-light);
  font-size: 1.4rem;
  transition: background-color var(--transition-fast);
}

.time-control:hover, .time-control.active {
  background-color: rgba(255, 255, 255, 0.4);
}

.panel-info {
  position: relative;
  display: flex;
  align-items: center;
  cursor: help;
}

.panel-info svg {
  width: 20px;
  height: 20px;
}

.tooltip {
  position: absolute;
  top: 100%;
  right: 0;
  width: 250px;
  padding: var(--spacing-sm);
  background-color: var(--card-bg);
  color: var(--text-primary);
  font-size: 1.2rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  visibility: hidden;
  opacity: 0;
  transition: all var(--transition-fast);
  z-index: 10;
}

.panel-info:hover .tooltip {
  visibility: visible;
  opacity: 1;
}

.panel-content {
  padding: var(--spacing-xl);
}

.vital-chart-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.chart-wrapper {
  height: 250px;
}

.vital-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  justify-content: space-around;
}

.metric-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background-color: var(--card-bg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  min-width: 220px;
}

.metric-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: rgba(77, 182, 172, 0.1);
  border-radius: var(--radius-circle);
}

.metric-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--primary-color);
}

.metric-info {
  flex-grow: 1;
}

.metric-name {
  font-size: 1.4rem;
  color: var(--text-secondary);
  margin-bottom: 2px;
}

.metric-value {
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-primary);
}

.unit {
  font-size: 1.4rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.metric-range {
  font-size: 1.2rem;
  color: var(--text-tertiary);
}

.voc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
}

.voc-radar {
  height: 250px;
}

.voc-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  justify-content: center;
}

.voc-detail-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.voc-name {
  font-weight: 500;
  min-width: 70px;
}

.voc-indicator {
  flex-grow: 1;
  height: 8px;
  background-color: var(--border-color);
  border-radius: var(--radius-circle);
  overflow: hidden;
}

.voc-level {
  height: 100%;
  background-color: var(--primary-color);
  border-radius: var(--radius-circle);
}

.voc-value {
  font-size: 1.4rem;
  min-width: 60px;
  text-align: right;
}

.voc-status {
  font-size: 1.2rem;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  min-width: 70px;
  text-align: center;
}

.voc-status.normal {
  background-color: var(--success-color);
  color: var(--text-light);
}

.voc-status.elevated {
  background-color: var(--warning-color);
  color: var(--text-primary);
}

.voc-status.high {
  background-color: var(--error-color);
  color: var(--text-light);
}

.voc-interpretation {
  padding: var(--spacing-md);
  background-color: rgba(77, 182, 172, 0.1);
  border-left: 3px solid var(--primary-color);
  border-radius: var(--radius-sm);
}

.voc-interpretation h4 {
  font-size: 1.6rem;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.voc-interpretation p {
  font-size: 1.4rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

.behavior-visual {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.activity-timeline {
  width: 100%;
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
  padding: 0 var(--spacing-xs);
  font-size: 1.2rem;
  color: var(--text-tertiary);
}

.timeline-track {
  position: relative;
  height: 40px;
  background-color: var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.timeline-segment {
  position: absolute;
  top: 0;
  height: 100%;
  padding-top: 10px;
  font-size: 1.2rem;
  color: var(--text-light);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.segment-label {
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.timeline-segment:hover .segment-label {
  opacity: 1;
}

.timeline-segment.sleep {
  background-color: #5E35B1;
}

.timeline-segment.light {
  background-color: #7986CB;
}

.timeline-segment.moderate {
  background-color: #4DB6AC;
}

.timeline-segment.intense {
  background-color: #66BB6A;
}

.timeline-segment.sedentary {
  background-color: #FF7043;
}

.behavior-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
}

.behavior-metric {
  background-color: var(--card-bg);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
}

.metric-title {
  font-size: 1.6rem;
  font-weight: 500;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.sleep-stages {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.sleep-stage {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.stage-name {
  min-width: 50px;
  font-size: 1.4rem;
}

.stage-bar {
  flex-grow: 1;
  height: 8px;
  background-color: var(--border-color);
  border-radius: var(--radius-circle);
  overflow: hidden;
}

.stage-progress {
  height: 100%;
  background-color: #5E35B1;
  border-radius: var(--radius-circle);
}

.stage-time {
  min-width: 50px;
  text-align: right;
  font-size: 1.4rem;
  color: var(--text-secondary);
}

.step-counter {
  display: flex;
  justify-content: center;
}

.step-circle {
  position: relative;
  width: 150px;
  height: 150px;
}

.step-data {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.step-count {
  font-size: 2.4rem;
  font-weight: 600;
  color: var(--text-primary);
}

.step-target {
  font-size: 1.4rem;
  color: var(--text-secondary);
}

/* CTA Section */
.cta-section {
  padding: var(--spacing-xxl) 0;
  background: linear-gradient(135deg, var(--secondary-dark) 0%, var(--secondary-color) 100%);
  color: var(--text-light);
  position: relative;
  overflow: hidden;
}

.cta-section .container {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  position: relative;
  z-index: 2;
}

.cta-content {
  flex: 2;
}

.cta-content h2 {
  font-size: 3.2rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-light);
}

.cta-content p {
  font-size: 1.8rem;
  margin-bottom: var(--spacing-lg);
  opacity: 0.9;
}

.cta-image {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.device-floating {
  position: relative;
  width: 200px;
  height: 200px;
  animation: float 5s ease-in-out infinite;
}

.device-screen-animated {
  width: 100%;
  height: 100%;
  background-color: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.screen-pulse {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, var(--primary-light) 0%, transparent 70%);
  opacity: 0.6;
  animation: pulse 4s ease-in-out infinite;
}

.device-shadow {
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 20px;
  background-color: rgba(0, 0, 0, 0.2);
  border-radius: 50%;
  filter: blur(10px);
  animation: shadowPulse 5s ease-in-out infinite;
}

/* Contact Section */
.contact-section {
  padding: var(--spacing-xxl) 0;
  background-color: var(--bg-color);
}

.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
}

.contact-form-container {
  background-color: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-xl);
}

.contact-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.form-group.full-width {
  grid-column: span 2;
}

.contact-form label {
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: var(--font-secondary);
  font-size: 1.6rem;
  transition: border-color var(--transition-fast);
}

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

.submit-button {
  grid-column: span 2;
  padding: var(--spacing-md);
  background-color: var(--primary-color);
  color: var(--text-light);
  font-family: var(--font-primary);
  font-size: 1.6rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.submit-button:hover {
  background-color: var(--primary-dark);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.info-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background-color: var(--card-bg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.info-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background-color: rgba(77, 182, 172, 0.1);
  border-radius: var(--radius-circle);
}

.info-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--primary-color);
}

.info-content h4 {
  font-size: 1.8rem;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.info-content p {
  font-size: 1.5rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: var(--card-bg);
  border-radius: var(--radius-circle);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.social-link svg {
  width: 20px;
  height: 20px;
  stroke: var(--primary-color);
}

.social-link:hover {
  background-color: var(--primary-color);
  transform: translateY(-3px);
}

.social-link:hover svg {
  stroke: var(--text-light);
}

/* Footer */
.main-footer {
  background-color: var(--dark-bg);
  color: var(--text-light);
  padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-xl);
}

.footer-logo {
  display: flex;
  align-items: center;
  font-family: var(--font-primary);
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--text-light);
}

.footer-logo .logo-svg {
  margin-right: var(--spacing-sm);
}

.footer-links {
  display: flex;
  gap: var(--spacing-xxl);
}

.footer-col h4 {
  font-size: 1.6rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-light);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-col a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.4rem;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--primary-light);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.copyright {
  font-size: 1.4rem;
  color: rgba(255, 255, 255, 0.5);
}

.footer-legal {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.4);
}

/* Animations */
@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-15px);
  }
}

@keyframes shadowPulse {
  0%, 100% {
    opacity: 0.2;
    transform: translateX(-50%) scale(1);
  }
  50% {
    opacity: 0.5;
    transform: translateX(-50%) scale(0.8);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 0.3;
    transform: scale(1);
  }
  50% {
    opacity: 0.6;
    transform: scale(1.1);
  }
}

@keyframes vocLevel {
  0% {
    height: var(--height);
  }
  50% {
    height: calc(var(--height) + 5%);
  }
  100% {
    height: var(--height);
  }
}

/* Responsive Styles */
@media (max-width: 1200px) {
  .hero-content {
    max-width: 100%;
  }
  
  .hero-device {
    position: relative;
    top: auto;
    right: auto;
    transform: none;
    width: 100%;
    margin-top: var(--spacing-xl);
  }
  
  .hero-section {
    padding: 12rem 0 6rem;
  }
  
  .device-container {
    margin: 0 auto;
    max-width: 300px;
  }
  
  .device-showcase {
    flex-direction: column;
    gap: var(--spacing-xl);
  }
  
  .cta-section .container {
    flex-direction: column;
    text-align: center;
  }
  
  .contact-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 992px) {
  html {
    font-size: 56.25%; /* 9px base */
  }
  
  .features-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
  
  .voc-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .behavior-metrics {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .footer-content {
    flex-direction: column;
    gap: var(--spacing-xl);
  }
  
  .footer-links {
    flex-wrap: wrap;
    gap: var(--spacing-xl);
  }
  
  .footer-col {
    min-width: 150px;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 50%; /* 8px base */
  }
  
  .main-nav {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .hero-content h1 {
    font-size: 4rem;
  }
  
  .hero-subtitle {
    font-size: 1.8rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .secondary-button {
    align-self: flex-start;
  }
  
  .voc-details {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .contact-form {
    grid-template-columns: 1fr;
  }
  
  .form-group.full-width {
    grid-column: span 1;
  }
  
  .submit-button {
    grid-column: span 1;
  }
}

@media (max-width: 576px) {
  .hero-content h1 {
    font-size: 3.5rem;
  }
  
  .section-header h2 {
    font-size: 3rem;
  }
  
  .panel-header {
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
  }
  
  .panel-controls {
    justify-content: center;
  }
  
  .panel-info {
    margin-top: var(--spacing-sm);
  }
  
  .metric-card {
    width: 100%;
  }
  
  .info-card {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-sm);
  }
}

@media (max-width: 375px) {
  .hero-content h1 {
    font-size: 3rem;
  }
  
  .device-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 1.2rem;
  }
}

/* Hamburger menu icon animation */
.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* Mobile menu active state */
.main-nav.active {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--bg-color);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-md);
  z-index: 100;
}

.main-nav.active ul {
  flex-direction: column;
  width: 100%;
}

.main-nav.active li {
  width: 100%;
  text-align: center;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--border-color);
}

.main-nav.active li:last-child {
  border-bottom: none;
}

.main-nav.active .cta-button {
  margin-top: var(--spacing-sm);
  width: 100%;
  text-align: center;
}