/* ==========================================================================
   BrightSmile Dental Care - Modern Aesthetic Design System
   ========================================================================== */

:root {
  /* Color Palette */
  --primary-50: #f0f8ff;
  --primary-100: #e0f2fe;
  --primary-200: #bae6fd;
  --primary-300: #7dd3fc;
  --primary-400: #38bdf8;
  --primary-500: #0ea5e9;
  --primary-600: #0284c7;
  --primary-700: #0369a1;
  --primary-800: #075985;
  --primary-900: #0c4a6e;
  
  --cyan-glow: #00e5ff;
  --cyan-accent: #00c6ff;
  --blue-vibrant: #1a8cff;
  --blue-deep: #0f2b48;
  --blue-darker: #091a2d;

  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;

  --bg-main: #f8fbfe;
  --bg-card: #ffffff;
  --bg-card-glass: rgba(255, 255, 255, 0.85);
  --bg-card-glass-subtle: rgba(255, 255, 255, 0.65);
  
  --text-dark: #0f172a;
  --text-body: #334155;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --text-white: #ffffff;

  --border-light: rgba(226, 232, 240, 0.8);
  --border-glass: rgba(255, 255, 255, 0.6);
  --border-glow: rgba(56, 189, 248, 0.35);

  --shadow-sm: 0 2px 8px -2px rgba(15, 43, 72, 0.05);
  --shadow-md: 0 10px 25px -5px rgba(15, 43, 72, 0.08), 0 8px 10px -6px rgba(15, 43, 72, 0.04);
  --shadow-lg: 0 20px 35px -10px rgba(14, 165, 233, 0.12), 0 10px 20px -5px rgba(15, 43, 72, 0.06);
  --shadow-xl: 0 25px 50px -12px rgba(14, 165, 233, 0.22);
  --shadow-glow: 0 0 30px rgba(0, 229, 255, 0.3);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text-body);
  background-color: var(--bg-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body {
  overflow-x: hidden;
  position: relative;
  background: radial-gradient(circle at 10% 10%, rgba(224, 242, 254, 0.6) 0%, transparent 40%),
              radial-gradient(circle at 90% 30%, rgba(186, 230, 253, 0.4) 0%, transparent 50%),
              radial-gradient(circle at 50% 80%, rgba(240, 248, 255, 0.8) 0%, transparent 60%),
              var(--bg-main);
}

img, canvas, svg {
  display: block;
  max-width: 100%;
}

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

button, input, select, textarea {
  font-family: inherit;
  border: none;
  outline: none;
  background: none;
}

button {
  cursor: pointer;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: #f1f5f9;
}
::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary-400);
}

/* Custom Interactive Cursor Glow */
.cursor-dot {
  width: 8px;
  height: 8px;
  background-color: var(--primary-600);
  border-radius: 50%;
  position: fixed;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: transform 0.08s ease, width 0.2s ease, height 0.2s ease;
}

.cursor-glow {
  width: 38px;
  height: 38px;
  border: 2px solid rgba(14, 165, 233, 0.4);
  background: radial-gradient(circle, rgba(0, 229, 255, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  position: fixed;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  transition: transform 0.18s cubic-bezier(0.16, 1, 0.3, 1), width 0.3s ease, height 0.3s ease, border-color 0.3s ease;
}

@media (pointer: coarse) {
  .cursor-dot, .cursor-glow {
    display: none;
  }
}

/* Containers & Typography */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 48px auto;
}

.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(14, 165, 233, 0.25);
  border-radius: var(--radius-full);
  color: var(--primary-700);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 16px;
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.08);
}

.pill-badge.pill-white {
  background: rgba(255, 255, 255, 0.95);
  border-color: rgba(255, 255, 255, 0.85);
  color: var(--primary-700);
  box-shadow: 0 4px 15px rgba(15, 43, 72, 0.06);
}

.pill-badge.pill-success {
  background: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.3);
  color: #065f46;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--success);
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulseGreen 2s infinite;
}

@keyframes pulseGreen {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.section-title {
  font-family: 'Outfit', sans-serif;
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-title .gradient-text,
.hero-main-title .gradient-text {
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-400) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  font-weight: 400;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7 0%, #0ea5e9 100%);
  color: #ffffff;
  box-shadow: 0 10px 25px -5px rgba(2, 132, 199, 0.4);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #0369a1 0%, #0284c7 100%);
  transform: translateY(-2px);
  box-shadow: 0 15px 30px -5px rgba(2, 132, 199, 0.55);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.95);
  color: var(--primary-700);
  border: 1px solid rgba(14, 165, 233, 0.28);
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.04);
}

.btn-secondary:hover {
  background: #ffffff;
  border-color: var(--primary-500);
  color: var(--primary-600);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(14, 165, 233, 0.15);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.main-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition-smooth);
}

.main-header.scrolled {
  padding: 10px 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 4px 20px rgba(15, 43, 72, 0.06);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--blue-deep);
}

.logo-icon-wrapper {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, #0ea5e9, #0284c7);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-text .brand-sub {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--primary-600);
  font-weight: 600;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-body);
  position: relative;
  padding: 6px 0;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--primary-600);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-500);
  border-radius: 2px;
  transition: width var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.phone-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(14, 165, 233, 0.2);
  color: var(--primary-700);
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.phone-pill:hover {
  background: #ffffff;
  border-color: var(--primary-500);
  box-shadow: 0 4px 14px rgba(14, 165, 233, 0.15);
  transform: translateY(-1px);
}

.phone-pill svg {
  color: var(--primary-500);
}

.mobile-menu-btn {
  display: none;
  padding: 8px;
  font-size: 1.5rem;
  color: var(--text-dark);
}

.mobile-nav-drawer {
  position: fixed;
  top: 70px;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  padding: 24px;
  box-shadow: var(--shadow-xl);
  border-bottom: 1px solid rgba(226, 232, 240, 0.9);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transform: translateY(-120%);
  transition: transform 0.35s ease;
  z-index: 999;
}

.mobile-nav-drawer.open {
  transform: translateY(0);
}

.mobile-nav-drawer a {
  font-size: 1.05rem;
  font-weight: 600;
  padding: 10px 0;
  border-bottom: 1px solid #f1f5f9;
}

/* ==========================================================================
   HERO SECTION (Split Layout without Empty Scroll Gap)
   ========================================================================== */
.hero-section {
  position: relative;
  padding: 125px 0 35px 0;
  min-height: 88vh;
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.hero-main-title {
  font-family: 'Outfit', sans-serif;
  font-size: 3.8rem;
  line-height: 1.12;
  font-weight: 800;
  color: var(--blue-deep);
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}

.hero-description {
  font-size: 1.12rem;
  color: var(--text-body);
  margin-bottom: 32px;
  line-height: 1.7;
  max-width: 520px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.hero-trust-badges {
  display: flex;
  align-items: center;
  gap: 16px;
}

.avatar-stack {
  display: flex;
  align-items: center;
}

.avatar-circle {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 2px solid #ffffff;
  margin-left: -10px;
  background: var(--primary-200);
  color: var(--primary-800);
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}

.avatar-circle:first-child {
  margin-left: 0;
  background: #bae6fd;
}
.avatar-circle:nth-child(2) {
  background: #7dd3fc;
}
.avatar-circle:nth-child(3) {
  background: #38bdf8;
  color: #ffffff;
}

.trust-rating-text {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.trust-rating-text strong {
  color: var(--text-dark);
  display: block;
}

/* 3D Visual Card on Right Column */
.hero-visual-col {
  position: relative;
  perspective: 1000px;
}

.hero-3d-card {
  position: relative;
  width: 100%;
  height: 480px;
  border-radius: var(--radius-xl);
  background: radial-gradient(circle at center, rgba(224, 242, 254, 0.6) 0%, rgba(255, 255, 255, 0.95) 75%);
  border: 1px solid rgba(255, 255, 255, 0.95);
  box-shadow: 0 25px 50px -12px rgba(14, 165, 233, 0.22);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  user-select: none;
  cursor: ew-resize;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
}

.hero-3d-card:hover {
  box-shadow: 0 30px 60px -10px rgba(14, 165, 233, 0.3);
}

.hero-ambient-glow {
  position: absolute;
  width: 440px;
  height: 440px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.35) 0%, rgba(0, 229, 255, 0.15) 50%, transparent 75%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  filter: blur(35px);
}

#heroCanvas {
  width: 100%;
  height: 100%;
  object-fit: contain;
  position: relative;
  z-index: 2;
  pointer-events: none;
}

/* Floating Callout Badges Orbiting the 3D Tooth */
.hero-floating-pill {
  position: absolute;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 10px 25px rgba(15, 43, 72, 0.12);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 10;
  pointer-events: none;
  transition: transform 0.3s ease;
}

.pill-top-right {
  top: 18px;
  right: 18px;
  animation: floatOrb 4s ease-in-out infinite;
}

.pill-bottom-left {
  bottom: 50px;
  left: 18px;
  animation: floatOrb 4.5s ease-in-out infinite 0.5s;
}

.pill-bottom-right {
  bottom: 50px;
  right: 18px;
  animation: floatOrb 5s ease-in-out infinite 1s;
}

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

.pill-mini-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--primary-100);
  color: var(--primary-600);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.pill-mini-text strong {
  display: block;
  font-size: 0.82rem;
  color: var(--text-dark);
}

.pill-mini-text span {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* Interactive 3D Control Hint Bar */
.hero-scrubber-hint {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 10px 18px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(226, 232, 240, 0.8);
  z-index: 12;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.scrubber-bar {
  width: 100%;
  height: 4px;
  background: #e2e8f0;
  border-radius: 2px;
  overflow: hidden;
}

.scrubber-fill {
  width: 1%;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan-glow), var(--primary-500));
  transition: width 0.05s ease-out;
}

.scrubber-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.76rem;
  color: var(--primary-700);
  font-weight: 600;
}

/* Scroll Progress Bar */
.scroll-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan-glow), var(--primary-500), var(--blue-vibrant));
  z-index: 1001;
  width: 0%;
  transition: width 0.05s ease-out;
}

/* ==========================================================================
   FEATURE RIBBON (Directly Below Hero, No Gap)
   ========================================================================== */
.feature-ribbon-section {
  position: relative;
  z-index: 30;
  padding: 20px 0 60px 0;
}

.feature-ribbon-card {
  background: #ffffff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(226, 232, 240, 0.9);
  padding: 20px 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.ribbon-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.ribbon-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -10px;
  top: 20%;
  height: 60%;
  width: 1px;
  background: rgba(226, 232, 240, 0.8);
}

.ribbon-item:hover {
  background: var(--primary-50);
  transform: translateY(-2px);
}

.ribbon-icon-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(14, 165, 233, 0.08);
  border: 1px solid rgba(14, 165, 233, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-600);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.ribbon-item:hover .ribbon-icon-circle {
  background: var(--primary-600);
  color: #ffffff;
  transform: scale(1.05);
}

.ribbon-text h3 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 2px;
}

.ribbon-text p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.35;
}

/* ==========================================================================
   Services Section (Matching Reference 3D Tooth Cards)
   ========================================================================== */
.services-section {
  padding: 40px 0 90px 0;
  position: relative;
}

.services-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 48px;
  align-items: flex-start;
}

.services-sidebar {
  position: sticky;
  top: 110px;
}

.services-sidebar h2 {
  font-family: 'Outfit', sans-serif;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-dark);
  line-height: 1.15;
  margin-bottom: 16px;
}

.services-sidebar p {
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 28px;
}

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

.service-card {
  background: #ffffff;
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: var(--radius-xl);
  padding: 32px 24px 24px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--cyan-glow), var(--primary-500));
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(14, 165, 233, 0.35);
}

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

.service-img-wrapper {
  width: 140px;
  height: 140px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-smooth);
}

.service-img-wrapper img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 10px 15px rgba(15, 43, 72, 0.08));
}

.service-card:hover .service-img-wrapper {
  transform: scale(1.08) translateY(-4px);
}

.service-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.service-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.5;
  flex-grow: 1;
}

.service-card-footer {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(241, 245, 249, 0.9);
  padding-top: 16px;
}

.service-price {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-700);
}

.service-arrow-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(14, 165, 233, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-600);
  background: #ffffff;
  transition: all var(--transition-fast);
}

.service-card:hover .service-arrow-btn {
  background: var(--primary-600);
  color: #ffffff;
  border-color: var(--primary-600);
  transform: translateX(3px);
}

/* ==========================================================================
   Interactive Before & After Smile Comparison
   ========================================================================== */
.comparison-section {
  padding: 80px 0;
  background: linear-gradient(180deg, rgba(240, 248, 255, 0.7) 0%, #ffffff 100%);
}

.comparison-wrapper {
  max-width: 960px;
  margin: 0 auto;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(226, 232, 240, 0.8);
  background: #ffffff;
}

.comparison-slider-container {
  position: relative;
  width: 100%;
  height: 460px;
  overflow: hidden;
  user-select: none;
  cursor: ew-resize;
}

.comparison-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
}

.comparison-img-before {
  filter: sepia(0.4) saturate(0.8) brightness(0.9) contrast(0.95);
}

.comparison-before-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 50%;
  height: 100%;
  overflow: hidden;
  z-index: 2;
}

.comparison-before-wrapper .comparison-img {
  width: 960px;
  max-width: none;
}

.comparison-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 4px;
  background: #ffffff;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.3);
  z-index: 10;
  transform: translateX(-50%);
  cursor: ew-resize;
}

.comparison-handle-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #ffffff;
  color: var(--primary-600);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.comparison-badge {
  position: absolute;
  top: 24px;
  padding: 8px 16px;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(8px);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.85rem;
  border-radius: var(--radius-full);
  z-index: 5;
  pointer-events: none;
}

.badge-before {
  left: 24px;
}

.badge-after {
  right: 24px;
  background: rgba(2, 132, 199, 0.85);
}

.comparison-footer-bar {
  padding: 24px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #ffffff;
  flex-wrap: wrap;
  gap: 16px;
}

.comparison-metrics {
  display: flex;
  align-items: center;
  gap: 32px;
}

.metric-box strong {
  display: block;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary-700);
}

.metric-box span {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Doctor & AI Diagnostics Showcase (Using Doctor PNG + Visor Glow)
   ========================================================================== */
.doctor-section {
  padding: 90px 0;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at 80% 50%, rgba(224, 242, 254, 0.6) 0%, transparent 60%),
              radial-gradient(circle at 20% 80%, rgba(186, 230, 253, 0.3) 0%, transparent 50%),
              #ffffff;
}

.doctor-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.doctor-info-col h2 {
  font-family: 'Outfit', sans-serif;
  font-size: 3rem;
  font-weight: 800;
  color: var(--text-dark);
  line-height: 1.15;
  margin-bottom: 20px;
}

.doctor-bio-text {
  font-size: 1.05rem;
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 28px;
}

.doctor-highlights-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 36px;
  list-style: none;
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-dark);
}

.highlight-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(14, 165, 233, 0.12);
  color: var(--primary-600);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.doctor-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding: 24px;
  background: var(--primary-50);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(14, 165, 233, 0.15);
  margin-bottom: 32px;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-family: 'Outfit', sans-serif;
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--primary-700);
  display: block;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* 3D Doctor Card Display */
.doctor-visual-col {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 1000px;
}

.doctor-card-frame {
  position: relative;
  width: 100%;
  max-width: 480px;
  height: 560px;
  border-radius: var(--radius-xl);
  background: linear-gradient(160deg, #ffffff 0%, #e0f2fe 100%);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 30px 60px -15px rgba(14, 165, 233, 0.25);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  overflow: visible;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.doctor-bg-decor {
  position: absolute;
  top: 50px;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.3) 0%, rgba(14, 165, 233, 0.15) 50%, transparent 75%);
  border-radius: 50%;
  filter: blur(20px);
}

.doctor-portrait-img {
  position: relative;
  z-index: 2;
  height: 96%;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 15px 25px rgba(15, 43, 72, 0.15));
  transition: transform 0.4s ease;
}

/* Futuristic Smart Visor Cyan Glow Overlay */
.visor-glow-effect {
  position: absolute;
  top: 17%;
  left: 50%;
  transform: translateX(-50%);
  width: 140px;
  height: 36px;
  background: radial-gradient(ellipse, rgba(0, 229, 255, 0.85) 0%, rgba(0, 229, 255, 0.2) 60%, transparent 80%);
  filter: blur(6px);
  z-index: 4;
  pointer-events: none;
  animation: visorPulse 2.8s infinite alternate;
}

@keyframes visorPulse {
  0% { opacity: 0.5; transform: translateX(-50%) scale(0.95); }
  100% { opacity: 1; transform: translateX(-50%) scale(1.1); filter: blur(8px); }
}

/* Floating Doctor Badges with Parallax */
.doc-floating-pill {
  position: absolute;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 12px 30px rgba(15, 43, 72, 0.12);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 10;
  pointer-events: none;
}

.doc-pill-1 {
  top: 15%;
  left: -20px;
}

.doc-pill-2 {
  bottom: 18%;
  right: -20px;
}

.doc-pill-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary-100);
  color: var(--primary-600);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.doc-pill-text strong {
  display: block;
  font-size: 0.88rem;
  color: var(--text-dark);
}

.doc-pill-text span {
  font-size: 0.76rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Interactive Smile Assessment & Treatment Cost Estimator
   ========================================================================== */
.assessment-section {
  padding: 80px 0;
  background: #f8fbfe;
}

.assessment-box {
  background: #ffffff;
  border-radius: var(--radius-xl);
  padding: 48px;
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(226, 232, 240, 0.8);
  max-width: 900px;
  margin: 0 auto;
}

.quiz-steps-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 36px;
  position: relative;
}

.quiz-steps-nav::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 2px;
  background: #e2e8f0;
  z-index: 0;
  transform: translateY(-50%);
}

.quiz-step-item {
  position: relative;
  z-index: 1;
  background: #ffffff;
  padding: 0 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.step-num {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #e2e8f0;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.quiz-step-item.active .step-num {
  background: var(--primary-600);
  color: #ffffff;
  box-shadow: 0 0 0 6px rgba(14, 165, 233, 0.2);
}

.quiz-step-item.completed .step-num {
  background: var(--success);
  color: #ffffff;
}

.step-name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.quiz-step-item.active .step-name {
  color: var(--primary-700);
}

.quiz-step-content {
  display: none;
}

.quiz-step-content.active {
  display: block;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.quiz-step-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 20px;
  text-align: center;
}

.quiz-options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.quiz-option-card {
  padding: 20px;
  border: 2px solid #e2e8f0;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.quiz-option-card:hover {
  border-color: var(--primary-400);
  background: var(--primary-50);
}

.quiz-option-card.selected {
  border-color: var(--primary-600);
  background: rgba(14, 165, 233, 0.08);
  box-shadow: 0 4px 14px rgba(14, 165, 233, 0.15);
}

.option-icon {
  font-size: 1.8rem;
}

.option-label {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-dark);
}

.option-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.quiz-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.calc-result-box {
  background: linear-gradient(135deg, var(--primary-50) 0%, #ffffff 100%);
  border: 1px solid rgba(14, 165, 233, 0.25);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
}

.calc-result-box h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--blue-deep);
  margin-bottom: 12px;
}

.calc-price-tag {
  font-size: 2.5rem;
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  color: var(--primary-600);
  margin-bottom: 8px;
}

/* ==========================================================================
   Clinic Interior & Reviews Wall
   ========================================================================== */
.reviews-section {
  padding: 80px 0;
  background: #ffffff;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.review-card {
  background: #ffffff;
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.review-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(14, 165, 233, 0.3);
}

.review-stars {
  color: #f59e0b;
  margin-bottom: 12px;
  display: flex;
  gap: 4px;
  font-size: 0.9rem;
}

.review-text {
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.6;
  margin-bottom: 20px;
}

.reviewer-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-100);
  color: var(--primary-700);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

.reviewer-details strong {
  display: block;
  font-size: 0.9rem;
  color: var(--text-dark);
}

.reviewer-details span {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Interactive FAQ Section
   ========================================================================== */
.faq-section {
  padding: 80px 0;
  background: var(--bg-main);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-question {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-dark);
  cursor: pointer;
}

.faq-toggle-icon {
  font-size: 1.2rem;
  color: var(--primary-600);
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-toggle-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 24px;
  color: var(--text-body);
  font-size: 0.92rem;
  line-height: 1.6;
  transition: max-height 0.35s ease, padding 0.35s ease;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px 24px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.main-footer {
  background: var(--blue-darker);
  color: #ffffff;
  padding: 80px 0 30px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand p {
  color: #94a3b8;
  font-size: 0.92rem;
  margin: 16px 0 24px 0;
  line-height: 1.6;
  max-width: 320px;
}

.footer-links-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 20px;
}

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

.footer-links-col a {
  color: #94a3b8;
  font-size: 0.88rem;
}

.footer-links-col a:hover {
  color: var(--cyan-glow);
  transform: translateX(3px);
}

.footer-hours-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 20px;
}

.footer-hours-card h4 {
  margin-bottom: 12px;
  font-size: 0.95rem;
}

.footer-hours-list {
  list-style: none;
  font-size: 0.85rem;
  color: #94a3b8;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-hours-list li {
  display: flex;
  justify-content: space-between;
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: #64748b;
  flex-wrap: wrap;
  gap: 16px;
}

/* ==========================================================================
   Appointment Booking Modal
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  padding: 20px;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: #ffffff;
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 36px;
  box-shadow: var(--shadow-xl);
  position: relative;
  transform: translateY(20px) scale(0.95);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-overlay.active .modal-card {
  transform: translateY(0) scale(1);
}

.modal-close-btn {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #f1f5f9;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  background: #e2e8f0;
  color: var(--text-dark);
}

.booking-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 24px;
}

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

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dark);
}

.form-control {
  padding: 12px 16px;
  border: 1px solid #cbd5e1;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  background: #ffffff;
  color: var(--text-dark);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.time-slots-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.time-slot-chip {
  padding: 8px 12px;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-sm);
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-body);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.time-slot-chip:hover {
  border-color: var(--primary-400);
  background: var(--primary-50);
}

.time-slot-chip.selected {
  background: var(--primary-600);
  color: #ffffff;
  border-color: var(--primary-600);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast-msg {
  padding: 14px 22px;
  background: #ffffff;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.15);
  border-left: 4px solid var(--primary-600);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-dark);
  animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .hero-3d-card {
    height: 420px;
  }
  .feature-ribbon-card {
    grid-template-columns: repeat(2, 1fr);
  }
  .ribbon-item:nth-child(2)::after {
    display: none;
  }
  .services-layout {
    grid-template-columns: 1fr;
  }
  .services-sidebar {
    position: static;
    text-align: center;
  }
  .doctor-layout {
    grid-template-columns: 1fr;
  }
  .doctor-visual-col {
    order: -1;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links, .phone-pill {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .hero-main-title {
    font-size: 2.6rem;
  }
  .hero-3d-card {
    height: 340px;
  }
  .feature-ribbon-card {
    grid-template-columns: 1fr;
  }
  .ribbon-item::after {
    display: none;
  }
  .services-grid {
    grid-template-columns: 1fr;
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  .comparison-slider-container {
    height: 320px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}