/* ===================================
   Eye Centers of Tennessee — Styles
   Charcoal + Coral Palette
   =================================== */

/* --- CSS Custom Properties --- */
:root {
  --color-charcoal-900: #1a1f2e;
  --color-charcoal-800: #2D3748;
  --color-charcoal-700: #374151;
  --color-charcoal-600: #4b5563;
  --color-charcoal-500: #6b7280;
  --color-charcoal-400: #9ca3af;
  --color-charcoal-100: #f3f4f6;
  --color-charcoal-50:  #f9fafb;
  
  --color-coral-600: #c44d3a;
  --color-coral-500: #E56451;
  --color-coral-400: #ef7b6e;
  --color-coral-300: #f5a096;
  --color-coral-100: #fde8e4;
  --color-coral-50:  #fef5f3;
  
  --color-white: #ffffff;
  --color-black: #0f172a;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  --shadow-sm: 0 1px 3px rgba(26,31,46,0.08), 0 1px 2px rgba(26,31,46,0.06);
  --shadow-md: 0 4px 16px rgba(26,31,46,0.10), 0 2px 4px rgba(26,31,46,0.06);
  --shadow-lg: 0 12px 40px rgba(26,31,46,0.14), 0 4px 12px rgba(26,31,46,0.08);
  --shadow-xl: 0 20px 60px rgba(26,31,46,0.18), 0 8px 20px rgba(26,31,46,0.10);
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-charcoal-800);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul { list-style: none; }
label { font-weight: 500; font-size: 0.875rem; color: var(--color-charcoal-700); }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(45,55,72,0.08);
  transition: box-shadow var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-charcoal-900);
  font-weight: 700;
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.logo-main {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.logo-sub {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--color-coral-500);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

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

.nav-menu a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-charcoal-600);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-coral-500);
  transition: width var(--transition-base);
}

.nav-menu a:hover {
  color: var(--color-charcoal-900);
}

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

.nav-cta {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--color-charcoal-900);
  color: var(--color-white) !important;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem !important;
  font-weight: 600 !important;
  transition: background var(--transition-fast), transform var(--transition-fast) !important;
}

.nav-cta::after { display: none !important; }

.nav-cta:hover {
  background: var(--color-coral-500) !important;
  color: var(--color-white) !important;
  transform: translateY(-1px);
}

/* Mobile Nav Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 1001;
}

.hamburger {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-charcoal-800);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle[aria-expanded="true"] .hamburger:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .hamburger:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .hamburger:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background: var(--color-white);
    flex-direction: column;
    align-items: flex-start;
    padding: 100px 32px 40px;
    gap: 24px;
    box-shadow: var(--shadow-xl);
    transition: right var(--transition-base);
  }
  
  .nav-menu.active { right: 0; }
  
  .nav-menu a { font-size: 1.1rem; }
  
  .nav-cta {
    width: 100%;
    justify-content: center;
  }
  
  .nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15,23,42,0.5);
    z-index: 999;
  }
  
  .nav-overlay.active { display: block; }
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  background: var(--color-charcoal-900);
  overflow: hidden;
  padding: 120px 0 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: 
    linear-gradient(135deg, rgba(26,31,46,0.96) 0%, rgba(45,55,72,0.92) 50%, rgba(26,31,46,0.88) 100%),
    url('https://images.pexels.com/photos/13060613/pexels-photo-13060613.jpeg?auto=compress&cs=tinysrgb&fit=crop&w=1600&h=900') center/cover no-repeat;
  z-index: 0;
}

/* Decorative grid pattern */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: 1;
  pointer-events: none;
}

.hero-container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content { max-width: 560px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(229,100,81,0.15);
  border: 1px solid rgba(229,100,81,0.3);
  color: var(--color-coral-300);
  padding: 8px 16px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-coral-400);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.4); }
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 5vw, 4.2rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-white);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.text-coral { color: var(--color-coral-400); }

.hero-subtitle {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-charcoal-400);
  margin-bottom: 40px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-coral-500);
  color: var(--color-white);
  box-shadow: 0 4px 16px rgba(229,100,81,0.35);
}

.btn-primary:hover {
  background: var(--color-coral-600);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(229,100,81,0.45);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(255,255,255,0.25);
}

.btn-outline:hover {
  border-color: var(--color-white);
  background: rgba(255,255,255,0.08);
  transform: translateY(-2px);
}

.btn-coral {
  background: var(--color-coral-500);
  color: var(--color-white);
}

.btn-coral:hover {
  background: var(--color-coral-600);
  transform: translateY(-2px);
}

.btn-full { width: 100%; justify-content: center; }

/* Floating Stat Cards */
.hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  max-width: 420px;
}

.stat-card {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  transition: transform var(--transition-base), background var(--transition-base);
}

.stat-card:hover {
  transform: translateY(-4px);
  background: rgba(255,255,255,0.11);
}

.stat-card--primary {
  background: var(--color-coral-500);
  border-color: var(--color-coral-500);
}

.stat-card--primary .stat-label { color: rgba(255,255,255,0.85); }

.stat-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.12);
  color: var(--color-white);
  margin-bottom: 14px;
}

.stat-card--primary .stat-icon {
  background: rgba(255,255,255,0.25);
}

.stat-number {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-white);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-charcoal-400);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

@media (max-width: 960px) {
  .hero-container { grid-template-columns: 1fr; }
  .hero-stats { max-width: 100%; margin-top: 48px; }
  .hero { min-height: auto; padding: 140px 0 80px; }
}

@media (max-width: 480px) {
  .hero-stats { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
}

/* --- Section Shared --- */
.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-coral-500);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-charcoal-900);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-charcoal-500);
  line-height: 1.7;
  max-width: 600px;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 64px;
}

.section-header .section-subtitle { margin: 0 auto; }

/* --- Services Section --- */
.services {
  padding: 100px 0;
  background: var(--color-charcoal-50);
}

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

.service-card {
  position: relative;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  border: 1px solid rgba(45,55,72,0.07);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  overflow: hidden;
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.service-card-accent {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-coral-500), var(--color-coral-300));
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

.service-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--color-coral-50);
  color: var(--color-coral-500);
  margin-bottom: 20px;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.service-card:hover .service-icon {
  background: var(--color-coral-500);
  color: var(--color-white);
}

.service-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-charcoal-900);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.service-card p {
  font-size: 0.925rem;
  color: var(--color-charcoal-500);
  line-height: 1.7;
}

@media (max-width: 900px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .services-grid { grid-template-columns: 1fr; }
  .services { padding: 72px 0; }
}

/* --- About Section --- */
.about {
  padding: 100px 0;
  background: var(--color-white);
}

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

.about-image-wrap {
  position: relative;
}

.about-image-wrap img {
  border-radius: var(--radius-xl);
  width: 100%;
  height: 480px;
  object-fit: cover;
  box-shadow: var(--shadow-lg);
}

.about-image-accent {
  position: absolute;
  bottom: -20px;
  right: -20px;
  width: 160px;
  height: 160px;
  border-radius: var(--radius-xl);
  background: var(--color-coral-100);
  z-index: -1;
}

.about-content .section-title { margin-bottom: 20px; }

.about-text {
  font-size: 1rem;
  color: var(--color-charcoal-600);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 32px;
}

.about-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-charcoal-700);
}

.about-feature svg {
  color: var(--color-coral-500);
  flex-shrink: 0;
}

@media (max-width: 900px) {
  .about-container { grid-template-columns: 1fr; gap: 40px; }
  .about-image-wrap img { height: 320px; }
}

@media (max-width: 480px) {
  .about-features { grid-template-columns: 1fr; }
  .about { padding: 72px 0; }
}

/* --- Insurance Section --- */
.insurance {
  padding: 100px 0;
  background: var(--color-charcoal-900);
}

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

.insurance .section-title { color: var(--color-white); }
.insurance .section-subtitle { color: var(--color-charcoal-400); }

.insurance-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 32px 0 40px;
}

.insurance-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--color-charcoal-100);
}

.insurance-list svg {
  color: var(--color-coral-400);
  flex-shrink: 0;
}

.insurance-image-wrap img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
}

@media (max-width: 900px) {
  .insurance-inner { grid-template-columns: 1fr; }
  .insurance-image-wrap { order: -1; }
  .insurance-image-wrap img { height: 260px; }
}

@media (max-width: 480px) {
  .insurance-list { grid-template-columns: 1fr; }
  .insurance { padding: 72px 0; }
}

/* --- Contact Section --- */
.contact {
  padding: 100px 0;
  background: var(--color-charcoal-50);
}

.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-text {
  font-size: 1.05rem;
  color: var(--color-charcoal-500);
  line-height: 1.7;
  margin-bottom: 40px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  gap: 16px;
}

.contact-item-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--color-white);
  color: var(--color-coral-500);
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.contact-item strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-charcoal-900);
  margin-bottom: 2px;
}

.contact-item p, .contact-item a {
  font-size: 0.9rem;
  color: var(--color-charcoal-500);
  line-height: 1.6;
}

.contact-item a:hover { color: var(--color-coral-500); }

/* Contact Form */
.contact-form-wrap {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(45,55,72,0.06);
}

.contact-form h3, .form-success h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-charcoal-900);
  margin-bottom: 24px;
}

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

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--color-charcoal-100);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.925rem;
  color: var(--color-charcoal-800);
  background: var(--color-charcoal-50);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-coral-500);
  box-shadow: 0 0 0 3px rgba(229,100,81,0.12);
  background: var(--color-white);
}

.form-group textarea { resize: vertical; min-height: 80px; }

.form-note {
  font-size: 0.8rem;
  color: var(--color-charcoal-400);
  margin-top: 12px;
  text-align: center;
}

.form-success {
  text-align: center;
  padding: 40px 20px;
}

.success-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-coral-50);
  color: var(--color-coral-500);
}

.form-success h3 { margin-bottom: 12px; }
.form-success p { color: var(--color-charcoal-500); font-size: 0.95rem; line-height: 1.7; }

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

@media (max-width: 480px) {
  .form-row { grid-template-columns: 1fr; }
  .contact-form-wrap { padding: 24px; }
  .contact { padding: 72px 0; }
}

/* --- Map Section --- */
.map-section {
  border-top: 1px solid rgba(45,55,72,0.08);
}

.map-embed {
  filter: grayscale(30%) contrast(1.05);
}

/* --- Footer --- */
.footer {
  background: var(--color-charcoal-900);
  color: var(--color-charcoal-400);
  padding: 64px 0 0;
}

.footer-container {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-white);
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--color-charcoal-400);
  max-width: 300px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-charcoal-100);
  margin-bottom: 16px;
}

.footer-col ul { display: flex; flex-direction: column; gap: 10px; }

.footer-col a, .footer-col li {
  font-size: 0.875rem;
  color: var(--color-charcoal-400);
  transition: color var(--transition-fast);
}

.footer-col a:hover { color: var(--color-coral-400); }

.footer-col li { list-style: none; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 24px 0;
}

.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--color-charcoal-500);
}

.footer-bottom a {
  color: var(--color-charcoal-400);
  transition: color var(--transition-fast);
}

.footer-bottom a:hover { color: var(--color-coral-400); }

@media (max-width: 640px) {
  .footer-container { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: 1fr 1fr; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
}

/* --- Scroll Reveal Animations --- */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  }
  
  .reveal.revealed {
    opacity: 1;
    transform: translateY(0);
  }
  
  .reveal-delay-1 { transition-delay: 0.1s; }
  .reveal-delay-2 { transition-delay: 0.2s; }
  .reveal-delay-3 { transition-delay: 0.3s; }
  .reveal-delay-4 { transition-delay: 0.4s; }
  .reveal-delay-5 { transition-delay: 0.5s; }
  .reveal-delay-6 { transition-delay: 0.6s; }
}