/* ==========================================================================
   CSS VARIABLES & DESIGN TOKENS
   ========================================================================== */
:root {
  /* Colors */
  --color-primary: #1A1A1A; /* Charcoal / Dark */
  --color-secondary: #C19A6B; /* Wood / Cognac / Caramel */
  --color-secondary-light: #d8b894;
  --color-bg: #FAFAFA; /* Off-white */
  --color-surface: #FFFFFF;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-border: #EEEEEE;
  
  /* Typography */
  --font-heading: 'Playfair Display', serif;
  --font-body: 'Inter', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  /* Utilities */
  --border-radius: 8px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 24px rgba(0,0,0,0.15);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* Dark Mode Variables (Optional enhancement depending on user pref) */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #121212;
    --color-surface: #1E1E1E;
    --color-text: #F0F0F0;
    --color-text-light: #BBBBBB;
    --color-border: #333333;
  }
}

/* ==========================================================================
   RESET & BASE
   ========================================================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

@media (prefers-color-scheme: dark) {
  h1, h2, h3, h4, h5, h6 {
    color: var(--color-text);
  }
}

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

a:hover {
  color: var(--color-secondary);
}

ul {
  list-style: none;
}

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

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

/* ==========================================================================
   BUTTONS & CTAs
   ========================================================================== */
.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  font-family: var(--font-body);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  border: none;
  font-size: 0.9rem;
}

.btn-primary {
  background-color: var(--color-secondary);
  color: #fff;
}

.btn-primary:hover {
  background-color: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

@media (prefers-color-scheme: dark) {
  .btn-secondary {
    color: var(--color-text);
    border-color: var(--color-text);
  }
}

.btn-secondary:hover {
  background-color: var(--color-primary);
  color: #fff;
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(250, 250, 250, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

@media (prefers-color-scheme: dark) {
  .header {
    background-color: rgba(18, 18, 18, 0.95);
  }
}

.header.scrolled {
  padding: 0;
  box-shadow: var(--shadow-md);
}

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

.logo {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.nav-menu {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  font-weight: 500;
  color: var(--color-primary);
  position: relative;
}

@media (prefers-color-scheme: dark) {
  .nav-link {
    color: var(--color-text);
  }
}

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

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

.mobile-toggle {
  display: none;
  font-size: 1.5rem;
  cursor: pointer;
  background: none;
  border: none;
  color: var(--color-primary);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('https://images.unsplash.com/photo-1555041469-a586c61ea9bc?auto=format&fit=crop&q=80&w=2000') no-repeat center center/cover;
  margin-top: 0;
}

.hero-content {
  color: #fff;
  max-width: 800px;
  animation: fadeInUp 1s ease-out;
}

.hero-content h1 {
  color: #fff;
  font-size: 4rem;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

.hero-content p {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.9;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
}
.hero-buttons .btn-secondary {
  border-color: #fff;
  color: #fff;
}
.hero-buttons .btn-secondary:hover {
  background-color: #fff;
  color: var(--color-primary);
}

/* ==========================================================================
   SECTIONS GENERAL
   ========================================================================== */
.section {
  padding: var(--spacing-xl) 0;
}

.section-bg {
  background-color: var(--color-surface);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.section-header h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-xs);
}

.section-header p {
  color: var(--color-text-light);
}

/* ==========================================================================
   GRID CARDS (Services / About / Features)
   ========================================================================== */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--spacing-lg);
  align-items: center;
}

.card {
  background-color: var(--color-surface);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--color-border);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-secondary);
}

.card-icon {
  font-size: 2.5rem;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-sm);
}

.card-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
  margin: calc(-1 * var(--spacing-md)) calc(-1 * var(--spacing-md)) var(--spacing-md) calc(-1 * var(--spacing-md));
  width: calc(100% + (2 * var(--spacing-md)));
}

/* ==========================================================================
   HOW IT WORKS / TIMELINE
   ========================================================================== */
.steps-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  text-align: center;
}

.step-number {
  width: 60px;
  height: 60px;
  background-color: var(--color-secondary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-family: var(--font-heading);
  margin: 0 auto var(--spacing-sm);
}

/* ==========================================================================
   STATS
   ========================================================================== */
.stats {
  background-color: var(--color-primary);
  color: #fff;
  padding: var(--spacing-lg) 0;
  text-align: center;
}

.stat-item h3 {
  color: var(--color-secondary);
  font-size: 3rem;
  margin-bottom: 0;
}

/* ==========================================================================
   TESTIMONIALS
   ========================================================================== */
.testimonial-card {
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-md);
  background-color: var(--color-bg);
  border-radius: var(--border-radius);
  position: relative;
}

.testimonial-card::before {
  content: '""';
  font-family: var(--font-heading);
  font-size: 6rem;
  color: var(--color-secondary);
  opacity: 0.2;
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
}

.testimonial-author {
  font-weight: 700;
  margin-top: var(--spacing-sm);
  color: var(--color-primary);
}

/* ==========================================================================
   FAQ
   ========================================================================== */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-sm) 0;
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--color-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: var(--transition);
  color: var(--color-text-light);
  margin-top: 0;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  margin-top: var(--spacing-xs);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  background-color: var(--color-primary);
  color: #fff;
  padding: var(--spacing-xl) 0 var(--spacing-sm);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer h4 {
  color: var(--color-secondary);
  margin-bottom: var(--spacing-md);
}

.footer-links li {
  margin-bottom: var(--spacing-xs);
}

.footer-links a {
  color: #ccc;
}

.footer-links a:hover {
  color: var(--color-secondary);
  padding-left: 5px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--spacing-sm);
  text-align: center;
  color: #888;
  font-size: 0.9rem;
}

/* ==========================================================================
   FLOATING ELEMENTS (WhatsApp & Top)
   ========================================================================== */
.fab-whatsapp {
  position: fixed;
  bottom: 20px;
  left: 20px;
  background-color: #25D366;
  color: #fff;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  box-shadow: var(--shadow-lg);
  z-index: 999;
  transition: var(--transition);
}

.fab-whatsapp:hover {
  transform: scale(1.1);
  color: #fff;
}

.fab-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background-color: var(--color-primary);
  color: #fff;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: var(--shadow-md);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.fab-top.visible {
  opacity: 1;
  visibility: visible;
}

.fab-top:hover {
  background-color: var(--color-secondary);
}

/* ==========================================================================
   ANIMATIONS & RESPONSIVE
   ========================================================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.8s ease-out;
}

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

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background-color: var(--color-surface);
    flex-direction: column;
    padding: var(--spacing-md);
    transition: var(--transition);
  }
  .nav-menu.active {
    left: 0;
  }
  .mobile-toggle {
    display: block;
  }
  .hero-content h1 {
    font-size: 2.5rem;
  }
  .hero-buttons {
    flex-direction: column;
  }
}