/* =========================================
   LUMINARE ODONTOLOGIA - PREMIUM STYLESHEET
   ========================================= */

:root {
  /* --- PALETTE --- */
  --color-primary: #00C9A7;       /* Turquesa Tecnológico */
  --color-primary-dark: #009e82;
  --color-secondary: #334155;     /* Azul Marinho Profundo */
  --color-bg-light: #F8F9FA;      /* Cinza Gelo */
  --color-white: #FFFFFF;
  --color-text: #334155;
  --color-text-light: #0F172A;
  
  /* --- GLASSMORPHISM --- */
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.5);
  --glass-blur: 12px;
  --glass-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);

  /* --- TYPOGRAPHY --- */
  --font-serif: 'Playfair Display', serif;
  --font-sans: 'Montserrat', sans-serif;

  /* --- SPACING & LAYOUT --- */
  --container-width: 1280px;
  --section-padding: 120px 0;
  --grid-gap: 2rem;
  --border-radius: 1px; /* Sharp/Minimalist feel */
  --border-radius-lg: 24px; /* Organic feel for specific cards */
  
  /* --- ANIMATIONS --- */
  --transition-fast: 0.3s cubic-bezier(0.25, 1, 0.5, 1);
  --transition-smooth: 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

/* =========================================
   RESET & BASE
   ========================================= */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { 
  scroll-behavior: smooth; 
  font-size: 16px; 
  overflow-x: hidden;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-light);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
  width: 100%;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--color-secondary);
  font-weight: 700;
  line-height: 1.2;
}

h1 { font-size: clamp(3rem, 5vw, 5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); margin-bottom: 1rem; }
h3 { font-size: 1.5rem; margin-bottom: 0.5rem; }

p { margin-bottom: 1.5rem; color: var(--color-text-light); }

a { text-decoration: none; color: inherit; transition: var(--transition-fast); }
ul { list-style: none; }
img { max-width: 100%; display: block; object-fit: cover; }

/* =========================================
   UTILITIES
   ========================================= */
.container {
  width: 90%;
  max-width: var(--container-width);
  margin: 0 auto;
}

.section { padding: var(--section-padding); position: relative; }
.bg-white { background-color: var(--color-white); }
.text-center { text-align: center; }

/* REVEAL ANIMATION CLASSES */
.reveal-up, .reveal-left, .reveal-right {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}
.reveal-left { transform: translateX(-30px); }
.reveal-right { transform: translateX(30px); }

.reveal-active {
  opacity: 1;
  transform: translate(0);
}

/* =========================================
   HEADER & NAV
   ========================================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 9999;
  padding: 1.5rem 0;
  transition: var(--transition-fast);
}

/* Gradient overlay for header legibility */
.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.9) 0%,
    rgba(255, 255, 255, 0.6) 50%,
    transparent 100%
  );
  z-index: -1;
  pointer-events: none;
}

.header.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--glass-border);
  padding: 1rem 0;
  box-shadow: var(--glass-shadow);
}

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

.logo {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-shadow: 0 1px 3px rgba(255, 255, 255, 0.8);
}

.logo span { color: var(--color-primary); }

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-link {
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.5px;
  position: relative;
  text-shadow: 0 1px 3px rgba(255, 255, 255, 0.8);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.3s ease;
}

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

/* Mobile Menu Button (Hidden on Desktop) */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 6px;
  z-index: 1002;
}

.mobile-menu-btn span {
  display: block;
  width: 25px;
  height: 2px;
  background-color: var(--color-secondary);
  transition: all 0.3s;
}

/* Hamburger Animation */
.mobile-menu-btn.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 6px); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }

.btn-cta {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 0.8rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: var(--transition-fast);
  box-shadow: 0 4px 15px rgba(0, 201, 167, 0.3);
}

.btn-cta:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 201, 167, 0.4);
}

/* =========================================
   HERO SECTION
   ========================================= */
.hero {
  height: 100vh;
  width: 100%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  z-index: -2;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to right,
    rgba(255, 255, 255, 0.9) 0%,
    rgba(255, 255, 255, 0.7) 40%,
    transparent 100%
  );
  z-index: -1;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
  margin-left: 5%; /* Offset to left */
  align-self: center;
}

.hero h1 { margin-bottom: 1.5rem; color: var(--color-secondary); }
.hero p { font-size: 1.125rem; margin-bottom: 2.5rem; }

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  opacity: 0.7;
  animation: bounce 2s infinite;
  font-size: 0.8rem;
  color: var(--color-secondary);
}

.mouse-icon {
  width: 24px;
  height: 40px;
  border: 2px solid var(--color-secondary);
  border-radius: 20px;
  position: relative;
}

.mouse-wheel {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  background-color: var(--color-secondary);
  border-radius: 50%;
  animation: scrollWheel 1.5s infinite;
}

@keyframes bounce { 0%, 20%, 50%, 80%, 100% {transform: translateY(0);} 40% {transform: translateY(-10px);} 60% {transform: translateY(-5px);} }
@keyframes scrollWheel { 0% {top: 8px; opacity: 1;} 100% {top: 18px; opacity: 0;} }

/* =========================================
   DIFFERENTIALS (CSS GRID)
   ========================================= */
.differentials-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: minmax(300px, auto);
  gap: var(--grid-gap);
  margin-top: 3rem;
}

.grid-item {
  position: relative;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 2rem;
  background-color: var(--color-white);
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
  transition: var(--transition-smooth);
}

.grid-item:hover { transform: translateY(-5px); box-shadow: 0 15px 40px rgba(0,0,0,0.1); }

.grid-item-1 { grid-column: span 8; background-color: #E0F2F1; } /* 3D Scan */
.grid-item-2 { grid-column: span 4; background-color: #F1F5F9; } /* Sedation text only */
.grid-item-3 { grid-column: span 4; background-color: #F8F9FA; } /* Invisalign logo */
.grid-item-4 { grid-column: span 8; background-color: #E2E8F0; } /* Sedation image */

.card-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s ease;
  z-index: 0;
}

.grid-item:hover .card-img { transform: scale(1.05); }

.card-content {
  position: relative;
  z-index: 1;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  padding: 1.5rem;
  border-radius: 12px;
  max-width: 80%;
}

/* =========================================
   BEFORE / AFTER SLIDER
   ========================================= */
.comparison-container {
  max-width: 1000px;
  margin: 4rem auto;
  position: relative;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0,0,0,0.1);
}

.comparison-image-container {
  position: relative;
  width: 100%;
  height: 500px; /* Fixed height for consistency */
}

@media (max-width: 768px) {
  .comparison-image-container { height: 350px; }
}

/* The 'Before' Image (Base) */
.img-before {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* The 'After' Image (Overlay) - STARTS VISIBLE, resized by JS */
.img-after-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 50%; /* JS will change this */
  height: 100%;
  overflow: hidden;
  border-right: 2px solid var(--color-white);
  z-index: 10;
}

.img-after {
  display: block;
  height: 100%;
  object-fit: cover;
  /* IMPORTANT: Wrapper width changes, but image stays absolute size */
  /* We need to set width via JS or precise CSS to match parent container width */
  width: 1000px; /* Fallback, needs to match container width dynamically if responsive */
  max-width: none; 
}

/* The Slider Handle */
.slider-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%; /* JS will change this */
  width: 40px;
  height: 40px;
  background: var(--color-white);
  border-radius: 50%;
  transform: translations(-50%, -50%); /* Center on the line */
  z-index: 20;
  cursor: ew-resize;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 10px rgba(0,0,0,0.2);
  top: 50%; /* Center vertically */
  margin-left: -20px; /* Offset half width */
}

.slider-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background: white;
    z-index: 19;
    pointer-events: none;
    margin-left: -1px;
}

.label {
  position: absolute;
  top: 2rem;
  padding: 0.5rem 1rem;
  background: rgba(0,0,0,0.6);
  color: white;
  border-radius: 4px;
  font-size: 0.8rem;
  letter-spacing: 1px;
  z-index: 15;
}
.label-before { right: 2rem; }
.label-after { left: 2rem; }

/* =========================================
   TREATMENTS TABS
   ========================================= */
.tabs-container { margin-top: 3rem; }

.tabs-header {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
  border-bottom: 2px solid #E2E8F0;
  padding-bottom: 1px;
}

.tab-btn {
  background: none;
  border: none;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--color-text-light);
  padding: 1rem 2rem;
  cursor: pointer;
  position: relative;
  transition: all 0.3s;
}

.tab-btn.active { color: var(--color-secondary); font-weight: 700; }
.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--color-primary);
}

.tab-content {
  display: none;
  animation: fadeIn 0.5s ease;
}
.tab-content.active { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.treatment-list li {
  margin-bottom: 1rem;
  padding-left: 2rem;
  position: relative;
}
.treatment-list li::before {
  content: '✦';
  color: var(--color-primary);
  position: absolute;
  left: 0;
  top: 2px;
}

/* =========================================
   GALLERY (SCROLL SNAP)
   ========================================= */
.gallery-wrapper {
  width: 100%;
  overflow-x: auto;
  scrollbar-width: none; /* Hide scrollbar Firefox */
  -ms-overflow-style: none;
  cursor: grab;
}
.gallery-wrapper::-webkit-scrollbar { display: none; }

.gallery-track {
  display: flex;
  gap: 2rem;
  padding: 2rem 5%; /* Side padding */
  width: max-content;
}

.gallery-item {
  width: 400px;
  max-width: 85vw; /* Responsive fix for mobile */
  height: 500px;
  flex-shrink: 0;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  position: relative;
  scroll-snap-align: center;
  transition: transform 0.3s ease;
}

.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.gallery-item:hover img { transform: scale(1.1); }

/* =========================================
   FOOTER
   ========================================= */
.footer {
  background-color: var(--color-secondary);
  color: var(--color-white);
  padding: 5rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.footer h4 { color: white; margin-bottom: 1.5rem; }
.footer p { color: #94A3B8; }

.footer-map {
  width: 100%;
  height: 200px;
  border-radius: 12px;
  overflow: hidden;
  background-color: #1E293B;
}

.social-links { display: flex; gap: 1rem; margin-top: 1.5rem; }
.social-links a { color: white; opacity: 0.7; font-size: 1.2rem; }
.social-links a:hover { opacity: 1; color: var(--color-primary); }

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 0.9rem;
  color: #64748B;
}

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 1024px) {
  .differentials-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-item-1, .grid-item-4 { grid-column: span 2; }
  .grid-item-2, .grid-item-3 { grid-column: span 1; }
  
  .img-after { width: 100vw; /* Approx correct for responsive slider */ } 
  .comparison-container { width: 90vw; }
}

@media (max-width: 768px) {
  /* Typography */
  h1 { font-size: 2.2rem; }
  
  /* Hero - Mobile Optimized */
  .hero-content { 
    margin-left: 0; 
    text-align: center; 
    padding: 0 1.5rem; 
    max-width: 100%; 
  }
  
  .hero {
    overflow: hidden;
    width: 100%;
    max-width: 100vw;
  }
  
  .hero-bg {
    object-position: center top;
    width: 100%;
    height: 100%;
    max-width: 100%;
  }
  
  .hero-overlay {
    background: linear-gradient(
      to bottom,
      rgba(255, 255, 255, 0.2) 0%,
      rgba(255, 255, 255, 0.4) 40%,
      rgba(255, 255, 255, 0.6) 100%
    );
  }
  
  .header {
    position: fixed !important;
    left: 0 !important;
    right: 0 !important;
  }
  
  /* Grids & Layouts */
  .differentials-grid { display: flex; flex-direction: column; }
  .tab-content.active { grid-template-columns: 1fr; gap: 2rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  
  /* Mobile Navigation Menu */
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 75%;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: right 0.4s cubic-bezier(0.77, 0, 0.175, 1);
    box-shadow: -10px 0 40px rgba(0,0,0,0.15);
    gap: 2.5rem;
    z-index: 10000;
  }

  .nav-links.active {
    right: 0;
    display: flex;
  }

  .nav-link { font-size: 1.4rem; color: var(--color-secondary); }
  
  .mobile-menu-btn { 
    display: flex; 
    z-index: 10001; /* Above nav-links */
  }
  
  .btn-cta { display: none; }
  
  /* Extra mobile fixes */
  .section { padding: 60px 0; }
  .scroll-indicator { display: none; }
  .tabs-header { flex-wrap: wrap; gap: 0.5rem; }
  .tab-btn { padding: 0.8rem 1rem; font-size: 1rem; }
  .gallery-item { height: 400px; }
}