/* Design System and Variables */
:root {
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Colors - Sleek air/purification theme using HSL */
  --primary-hue: 199; /* Sky blue */
  --secondary-hue: 221; /* Deep blue */
  
  --primary: hsl(var(--primary-hue), 89%, 48%);
  --primary-hover: hsl(var(--primary-hue), 89%, 40%);
  --primary-light: hsl(var(--primary-hue), 90%, 96%);
  
  --secondary: hsl(var(--secondary-hue), 83%, 53%);
  --secondary-hover: hsl(var(--secondary-hue), 83%, 45%);
  
  --slate-50: hsl(210, 40%, 98%);
  --slate-100: hsl(210, 40%, 96%);
  --slate-200: hsl(214, 32%, 91%);
  --slate-300: hsl(213, 27%, 84%);
  --slate-400: hsl(215, 20%, 65%);
  --slate-600: hsl(215, 25%, 35%);
  --slate-700: hsl(215, 25%, 27%);
  --slate-800: hsl(217, 33%, 17%);
  --slate-900: hsl(222, 47%, 11%);
  
  --green-500: hsl(142, 71%, 45%);
  --red-500: hsl(0, 84%, 60%);
  
  --bg-gradient: linear-gradient(135deg, hsl(199, 100%, 95%) 0%, hsl(221, 100%, 93%) 50%, hsl(214, 100%, 95%) 100%);
  --dark-gradient: linear-gradient(135deg, hsl(222, 47%, 11%) 0%, hsl(222, 47%, 8%) 50%, hsl(223, 47%, 4%) 100%);
  --text-gradient: linear-gradient(90deg, hsl(199, 89%, 45%) 0%, hsl(221, 83%, 53%) 100%);
  
  /* Shadows & Radius */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-premium: 0 25px 50px -12px rgba(15, 23, 42, 0.08), 0 0 40px rgba(14, 165, 233, 0.05);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: #ffffff;
  color: var(--slate-700);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--slate-800);
  font-weight: 700;
  line-height: 1.25;
}

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

/* Scrollbar Customization */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--slate-50);
}
::-webkit-scrollbar-thumb {
  background: var(--slate-300);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--slate-400);
}

/* Grid & Layout Utilities */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.grid {
  display: grid;
  gap: 32px;
}

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
  .grid-5 { grid-template-columns: repeat(5, 1fr); }
}

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: var(--transition-normal);
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(12px);
}

header.scrolled {
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
  transition: var(--transition-normal);
}

header.scrolled .nav-container {
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo img {
  height: 38px;
  filter: brightness(0.15); /* Makes logo dark slate at top */
  transition: var(--transition-normal);
}

header.scrolled .logo img {
  filter: invert(1) brightness(100%); /* Makes logo white when scrolled */
}

.logo-lbl {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--slate-800);
  transition: var(--transition-normal);
  display: flex;
  align-items: center;
  gap: 4px;
}

header.scrolled .logo-lbl {
  color: #ffffff;
}

.logo-sub {
  font-size: 0.75rem;
  vertical-align: super;
  color: var(--primary);
  font-weight: 700;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  color: var(--slate-700);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 4px 0;
  transition: var(--transition-fast);
}

header.scrolled .nav-link {
  color: rgba(255, 255, 255, 0.85);
}

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

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

header.scrolled .nav-link:hover {
  color: #ffffff;
}

.nav-link:hover::after {
  width: 100%;
}

/* Menu Toggle Button (Mobile) */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--slate-800);
  padding: 8px;
  transition: var(--transition-normal);
}

header.scrolled .menu-toggle {
  color: #ffffff;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-family: var(--font-heading);
  font-weight: 600;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: var(--transition-normal);
  font-size: 0.975rem;
  box-shadow: var(--shadow-md);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #ffffff;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 20px -8px rgba(14, 165, 233, 0.4);
}

.btn-secondary {
  background: #ffffff;
  color: var(--slate-800);
}

.btn-secondary:hover {
  background: var(--slate-50);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-sm {
  padding: 10px 20px;
  font-size: 0.875rem;
}

/* Badge Utility */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(8px);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--slate-800);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(255, 255, 255, 0.5);
  margin-bottom: 24px;
}

.badge svg {
  color: var(--primary);
  animation: rotateWind 3s linear infinite;
}

@keyframes rotateWind {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Section Common Styling */
.section {
  padding: 100px 0;
  position: relative;
}

.section-title-wrap {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-size: 2.75rem;
  margin-bottom: 16px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: 1.15rem;
  color: var(--slate-600);
  max-width: 600px;
  margin: 0 auto;
}

/* Hero Section */
.hero {
  min-h: 100vh;
  display: flex;
  align-items: center;
  background: var(--bg-gradient);
  position: relative;
  padding-top: 120px;
  overflow: hidden;
}

.hero-blob {
  position: absolute;
  border-radius: var(--radius-full);
  filter: blur(100px);
  opacity: 0.4;
  pointer-events: none;
}

.hero-blob-1 {
  width: 400px;
  height: 400px;
  background: rgba(14, 165, 233, 0.3);
  top: 10%;
  left: -50px;
}

.hero-blob-2 {
  width: 450px;
  height: 450px;
  background: rgba(59, 130, 246, 0.25);
  bottom: 10%;
  right: -50px;
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: 60px;
  position: relative;
  z-index: 10;
}

@media (min-width: 992px) {
  .hero-container {
    grid-template-columns: 1.1fr 0.9fr;
  }
}

.hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 5;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  position: relative;
  z-index: 10;
}

/* Page Load Animations for Hero */
@keyframes slideUpFade {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDownFade {
  from { opacity: 0; transform: translateY(-30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes scaleUpFade {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.hero-content .badge {
  opacity: 0;
  animation: slideDownFade 1s cubic-bezier(0.2, 0.8, 0.2, 1) 0.1s forwards;
}

.hero-title {
  font-size: 3.75rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 24px;
  opacity: 0;
  animation: slideUpFade 1s cubic-bezier(0.2, 0.8, 0.2, 1) 0.25s forwards;
}

.hero-title span {
  display: block;
  background: var(--text-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--slate-600);
  margin-bottom: 36px;
  line-height: 1.6;
  max-width: 540px;
  opacity: 0;
  animation: slideUpFade 1s cubic-bezier(0.2, 0.8, 0.2, 1) 0.4s forwards;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  opacity: 0;
  animation: slideUpFade 1s cubic-bezier(0.2, 0.8, 0.2, 1) 0.55s forwards;
}

.hero-media-wrap {
  position: relative;
  width: 100%;
  opacity: 0;
  animation: scaleUpFade 1.2s cubic-bezier(0.2, 0.8, 0.2, 1) 0.35s forwards;
}

.hero-img-backdrop {
  position: absolute;
  inset: -10px;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.15), rgba(59, 130, 246, 0.15));
  filter: blur(24px);
  border-radius: var(--radius-xl);
  z-index: 1;
}

.hero-img-container {
  position: relative;
  z-index: 2;
  background: rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(16px);
  padding: 16px;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-premium);
  border: 1px solid rgba(255, 255, 255, 0.6);
  animation: floatImg 6s ease-in-out infinite;
}

.hero-img-container img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  display: block;
  object-fit: cover;
}

@keyframes floatImg {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0px); }
}

/* Stats/Metrics Row */
.stats-row {
  background: #ffffff;
  border-top: 1px solid var(--slate-100);
  border-bottom: 1px solid var(--slate-100);
  padding: 30px 0;
  position: relative;
  z-index: 20;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--slate-600);
  font-weight: 500;
}

/* Why Choose Section */
.features-section {
  background: #ffffff;
}

.features-grid {
  margin-top: 60px;
}

.feature-card {
  background: linear-gradient(145deg, var(--slate-50), #ffffff);
  border: 1px solid rgba(241, 245, 249, 0.8);
  padding: 40px 32px;
  border-radius: var(--radius-lg);
  transition: var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(14, 165, 233, 0.15);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon-box {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #ffffff;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  box-shadow: 0 8px 16px -4px rgba(14, 165, 233, 0.3);
  transition: var(--transition-normal);
}

.feature-card:hover .feature-icon-box {
  transform: scale(1.1) rotate(5deg);
}

.feature-icon-box svg {
  width: 26px;
  height: 26px;
}

.feature-title {
  font-size: 1.25rem;
  margin-bottom: 12px;
  font-weight: 700;
}

.feature-text {
  font-size: 0.95rem;
  color: var(--slate-600);
  line-height: 1.6;
}

/* Accent banner */
.banner-section {
  background: var(--slate-50);
  padding: 40px 0;
}

.banner-card {
  background: linear-gradient(135deg, hsl(199, 89%, 45%), hsl(221, 83%, 53%));
  color: #ffffff;
  padding: 40px 50px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.banner-card h3 {
  color: #ffffff;
  font-size: 1.85rem;
  margin-bottom: 10px;
  font-weight: 700;
}

.banner-card p {
  color: hsl(199, 90%, 93%);
  font-size: 1.05rem;
  font-weight: 500;
}

/* Odors Section */
.odors-section {
  background: #ffffff;
}

.odors-container {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: 60px;
  margin-top: 40px;
}

@media (min-width: 992px) {
  .odors-container {
    grid-template-columns: 1fr 0.6fr 1fr;
  }
}

.odors-column {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.odor-card {
  background: #ffffff;
  border: 1px solid var(--slate-100);
  border-radius: var(--radius-lg);
  padding: 30px;
  display: flex;
  gap: 20px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

.odor-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--slate-200);
  transform: translateY(-2px);
}

.odor-icon-box {
  background: var(--primary-light);
  color: var(--primary);
  width: 50px;
  height: 50px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.odor-icon-box svg {
  width: 24px;
  height: 24px;
}

.odor-info h3 {
  font-size: 1.15rem;
  margin-bottom: 6px;
  font-weight: 700;
}

.odor-info p {
  font-size: 0.925rem;
  color: var(--slate-600);
}

/* Central Badge/Orb */
.center-badge-column {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

.glowing-orb-wrap {
  position: relative;
  margin-bottom: 20px;
}

.glowing-orb-backdrop {
  position: absolute;
  inset: -10px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  opacity: 0.25;
  filter: blur(20px);
  border-radius: var(--radius-full);
  animation: backdropPulse 6s infinite ease-in-out;
}

@keyframes backdropPulse {
  0%, 100% { opacity: 0.2; transform: scale(1); filter: blur(20px); }
  50% { opacity: 0.4; transform: scale(1.25); filter: blur(25px); }
}

.glowing-orb {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #ffffff;
  width: 120px;
  height: 120px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 2;
  animation: pulseGlow 4s infinite ease-in-out;
}

@keyframes pulseGlow {
  0%, 100% {
    box-shadow: 0 0 15px rgba(14, 165, 233, 0.4), var(--shadow-lg);
    transform: scale(1);
  }
  50% {
    box-shadow: 0 0 35px rgba(14, 165, 233, 0.7), var(--shadow-lg);
    transform: scale(1.04);
  }
}

.glowing-orb svg {
  width: 48px;
  height: 48px;
  animation: floatOrb 4s ease-in-out infinite;
}

@keyframes floatOrb {
  0% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-4px) rotate(8deg); }
  100% { transform: translateY(0px) rotate(0deg); }
}

.center-badge-label {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--slate-800);
  text-align: center;
}

.center-badge-sub {
  font-size: 0.875rem;
  color: var(--primary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Science Section */
.science-section {
  background: var(--dark-gradient);
  color: #ffffff;
  overflow: hidden;
}

.science-section .section-title {
  color: #ffffff;
}

.science-section .section-subtitle {
  color: var(--slate-300);
}

.science-container {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: 60px;
}

@media (min-width: 992px) {
  .science-container {
    grid-template-columns: 0.9fr 1.1fr;
  }
}

.science-media-wrap {
  position: relative;
  width: 100%;
}

.science-img-backdrop {
  position: absolute;
  inset: -15px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.25) 0%, transparent 70%);
  filter: blur(30px);
  z-index: 1;
}

.science-img-container {
  position: relative;
  z-index: 2;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(12px);
  padding: 16px;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 30px 60px -15px rgba(0, 0, 0, 0.5);
  transition: var(--transition-slow);
}

.science-img-container:hover {
  border-color: rgba(14, 165, 233, 0.4);
}

.science-img-container img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  display: block;
}

.science-content {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.science-headline {
  font-size: 2.25rem;
  font-weight: 800;
  color: #ffffff;
}

.science-headline span {
  display: block;
  background: linear-gradient(90deg, hsl(199, 89%, 60%) 0%, hsl(221, 83%, 65%) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.science-desc {
  font-size: 1.05rem;
  color: var(--slate-300);
  line-height: 1.7;
}

.science-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.science-list-item {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 1.1rem;
  color: var(--slate-100);
  transition: var(--transition-fast);
  cursor: default;
}

.science-list-item:hover {
  transform: translateX(6px);
}

.science-list-item svg {
  color: var(--primary);
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  transition: var(--transition-normal);
}

.science-list-item:hover svg {
  transform: scale(1.2);
}

/* Inquiry / Consultation Form Section */
.inquiry-section {
  background: var(--slate-50);
}

.inquiry-container {
  max-width: 960px;
  margin: 0 auto;
}

.form-layout {
  display: grid;
  grid-template-columns: 1fr;
  background: #ffffff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-premium);
  border: 1px solid var(--slate-200);
  overflow: hidden;
}

@media (min-width: 992px) {
  .form-layout {
    grid-template-columns: 1.3fr 0.7fr;
  }
}

.form-main {
  padding: 48px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.form-group-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .form-group-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--slate-800);
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--slate-800);
  border: 2px solid var(--slate-200);
  border-radius: var(--radius-md);
  outline: none;
  transition: var(--transition-normal);
}

.form-input::placeholder {
  color: var(--slate-400);
}

.form-input:focus {
  border-color: var(--primary);
}

/* Odor Selector Cards */
.smell-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

@media (min-width: 576px) {
  .smell-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.smell-btn {
  background: #ffffff;
  border: 2px solid var(--slate-200);
  border-radius: var(--radius-md);
  padding: 16px 12px;
  cursor: pointer;
  text-align: center;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.smell-btn:hover {
  border-color: var(--slate-300);
  background: var(--slate-50);
}

.smell-btn.active {
  border-color: var(--primary);
  background: var(--primary-light);
  box-shadow: var(--shadow-md);
  transform: scale(1.03);
}

.smell-btn svg {
  width: 28px;
  height: 28px;
  color: var(--slate-400);
  transition: var(--transition-normal);
}

.smell-btn.active svg {
  color: var(--primary);
}

.smell-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--slate-600);
}

.smell-btn.active .smell-label {
  color: var(--slate-800);
}

/* Custom Range Sliders */
.slider-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.slider-val-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.slider-val {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.slider-unit {
  font-size: 0.875rem;
  color: var(--slate-600);
  font-weight: 600;
}

.slider-input-wrap {
  display: flex;
  align-items: center;
  gap: 16px;
}

.slider-icon {
  width: 32px;
  height: 32px;
  transition: var(--transition-normal);
}

.range-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--slate-200);
  outline: none;
  cursor: pointer;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-full);
  background: var(--primary);
  border: 3px solid #ffffff;
  box-shadow: var(--shadow-md);
  transition: var(--transition-fast);
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  background: var(--secondary);
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--slate-400);
  font-weight: 600;
}

.slider-labels .middle-lbl {
  text-align: center;
}

/* Form Action Area */
.form-footer {
  display: flex;
  flex-direction: column;
  gap: 16px;
  border-top: 1px solid var(--slate-100);
  padding-top: 24px;
}

.form-footer-note {
  font-size: 0.8rem;
  color: var(--slate-400);
  text-align: center;
}

.form-actions {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

@media (min-width: 576px) {
  .form-actions {
    flex-direction: row;
  }
}

.btn-submit {
  flex: 1;
}

.btn-reset {
  background: var(--slate-100);
  color: var(--slate-600);
  box-shadow: none;
}

.btn-reset:hover {
  background: var(--slate-200);
  color: var(--slate-800);
}

/* Side Card Recommendation Panel */
.form-sidebar {
  background: var(--slate-900);
  color: #ffffff;
  padding: 48px 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.sidebar-glow {
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: var(--radius-full);
  background: radial-gradient(circle, rgba(14, 165, 233, 0.15) 0%, transparent 70%);
  bottom: -150px;
  right: -150px;
  pointer-events: none;
}

.sidebar-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.sidebar-title {
  font-size: 1.35rem;
  color: #ffffff;
  font-weight: 700;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 12px;
}

.rec-box {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.rec-title-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.rec-lbl {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--primary);
  font-weight: 700;
}

.rec-badge {
  background: rgba(14, 165, 233, 0.2);
  color: var(--primary);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
}

.rec-device {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: #ffffff;
}

.rec-detail-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--slate-300);
}

.rec-detail-item {
  display: flex;
  gap: 8px;
}

.rec-detail-item svg {
  color: var(--primary);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 2px;
}

.sidebar-footer {
  font-size: 0.8rem;
  color: var(--slate-400);
  line-height: 1.4;
}

/* Contact Info / Footer Area */
.contact-section {
  background: #ffffff;
  border-top: 1px solid var(--slate-100);
  padding-bottom: 0;
}

.contact-card-container {
  background: var(--slate-900);
  border-radius: var(--radius-xl);
  color: #ffffff;
  padding: 60px;
  margin-bottom: -60px;
  position: relative;
  z-index: 10;
  box-shadow: var(--shadow-xl);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.contact-col {
  display: flex;
  gap: 20px;
}

.contact-icon-wrap {
  width: 50px;
  height: 50px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
}

.contact-icon-wrap svg {
  width: 22px;
  height: 22px;
}

.contact-content h3 {
  color: #ffffff;
  font-size: 1.15rem;
  margin-bottom: 6px;
  font-weight: 700;
}

.contact-content p, .contact-content a {
  color: var(--slate-300);
  font-size: 0.95rem;
}

.contact-content a:hover {
  color: #ffffff;
  text-decoration: underline;
}

/* Footer styling */
footer {
  background: #0b0f19;
  color: #ffffff;
  padding: 120px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 48px;
  margin-bottom: 30px;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1.2fr 0.8fr 1fr;
  }
}

.footer-col-desc {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-logo img {
  height: 32px;
  filter: invert(1) brightness(0) invert(1);
}

.footer-logo-lbl {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1rem;
}

.footer-desc-text {
  font-size: 0.9rem;
  color: var(--slate-400);
  line-height: 1.6;
}

.footer-col h3 {
  color: #ffffff;
  font-size: 1.05rem;
  margin-bottom: 20px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link a {
  font-size: 0.9rem;
  color: var(--slate-400);
}

.footer-link a:hover {
  color: #ffffff;
}

.footer-bottom-info {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.license-info {
  font-size: 0.85rem;
  color: var(--slate-400);
}

.copyright-text {
  font-size: 0.85rem;
  color: var(--slate-400);
}

.credit-text {
  font-size: 0.75rem;
  color: var(--slate-500);
}

.credit-text a {
  color: var(--slate-400);
  text-decoration: underline;
}

.credit-text a:hover {
  color: #ffffff;
}

/* Animations Trigger Classes (Reveal-on-scroll) */
.reveal-up {
  opacity: 0;
  transform: translateY(40px);
  transition: transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.8s ease;
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.8s ease;
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.8s ease;
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.94);
  transition: transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.8s ease;
}

.reveal-up.active,
.reveal-left.active,
.reveal-right.active,
.reveal-scale.active {
  opacity: 1;
  transform: translate(0) scale(1);
}

/* Mobile Menu Slide */
@media (max-width: 767px) {
  .menu-toggle {
    display: block;
  }
  
  .nav-links {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: var(--slate-900);
    padding: 30px 24px;
    flex-direction: column;
    align-items: stretch;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    gap: 20px;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-normal);
  }
  
  header.scrolled .nav-links {
    top: 70px;
  }
  
  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  
  .nav-link {
    text-align: center;
    padding: 10px 0;
    font-size: 1.1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    color: rgba(255, 255, 255, 0.85);
  }
  
  .nav-link:hover {
    color: #ffffff;
  }
  
  .nav-link::after {
    display: none;
  }
  
  .nav-links .btn {
    margin-top: 10px;
  }
}