/* ==========================================================================
   VARNIKA INTERIOR DESIGN - LUXURY DESIGN SYSTEM & STYLES
   ========================================================================== */

/* 1. CSS VARIABLES & DESIGN TOKENS */
:root {
  --color-gold: #B8860B;
  --color-gold-light: #D4AF37;
  --color-gold-dark: #966F0D;
  --color-gold-glow: rgba(184, 134, 11, 0.25);
  
  --color-beige: #F5F1EB;
  --color-beige-dark: #E8E1D5;
  --color-beige-light: #FAF8F5;

  --color-charcoal: #222222;
  --color-charcoal-dark: #141414;
  --color-charcoal-card: #1C1C1C;
  --color-charcoal-border: rgba(255, 255, 255, 0.1);

  --color-light-grey: #F8F8F8;
  --color-mid-grey: #E5E5E5;
  --color-text-muted: #666666;
  --color-text-light: #A0A0A0;
  --color-white: #FFFFFF;

  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --transition-fast: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);
  --shadow-gold: 0 10px 30px rgba(184, 134, 11, 0.2);
  --shadow-dark: 0 20px 50px rgba(0, 0, 0, 0.4);

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
}

/* 2. BASE & RESET */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-charcoal);
}

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

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

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* 3. TYPOGRAPHY & UTILITIES */
.font-heading { font-family: var(--font-heading); }
.font-body { font-family: var(--font-body); }

.text-gold { color: var(--color-gold) !important; }
.text-gold-light { color: var(--color-gold-light) !important; }
.bg-gold { background-color: var(--color-gold) !important; }
.bg-beige { background-color: var(--color-beige) !important; }
.bg-charcoal { background-color: var(--color-charcoal) !important; }
.bg-light-grey { background-color: var(--color-light-grey) !important; }

.gold-gradient-text {
  background: linear-gradient(135deg, #D4AF37 0%, #B8860B 50%, #966F0D 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.gold-line {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-gold-light));
  border-radius: var(--radius-full);
  margin: 12px 0 24px;
}

.gold-line-center {
  margin: 12px auto 24px;
}

/* 4. PRELOADER */
#preloader {
  position: fixed;
  inset: 0;
  background-color: var(--color-charcoal-dark);
  z-index: 99999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}

#preloader.loaded {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.preloader-content {
  text-align: center;
}

.preloader-logo {
  width: 220px;
  filter: drop-shadow(0 0 15px rgba(212, 175, 55, 0.4));
  animation: pulseLogo 2s infinite ease-in-out;
}

.preloader-bar {
  width: 180px;
  height: 3px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  margin-top: 24px;
  overflow: hidden;
  position: relative;
}

.preloader-progress {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--color-gold), var(--color-gold-light));
  animation: fillProgress 1.8s ease-in-out forwards;
}

@keyframes pulseLogo {
  0%, 100% { transform: scale(1); opacity: 0.9; }
  50% { transform: scale(1.04); opacity: 1; }
}

@keyframes fillProgress {
  0% { width: 0%; }
  100% { width: 100%; }
}

/* 5. BUTTONS & UI COMPONENTS */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold));
  color: var(--color-white);
  font-weight: 500;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-gold);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-gold-dark), var(--color-gold));
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: -1;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 35px rgba(184, 134, 11, 0.35);
  color: var(--color-white);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  color: var(--color-white);
  font-weight: 500;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.3);
  cursor: pointer;
  transition: var(--transition-normal);
}

.btn-secondary:hover {
  background: var(--color-white);
  color: var(--color-charcoal);
  border-color: var(--color-white);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.btn-dark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--color-charcoal);
  color: var(--color-white);
  font-weight: 500;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: var(--transition-normal);
}

.btn-dark:hover {
  background: var(--color-gold);
  transform: translateY(-3px);
  box-shadow: var(--shadow-gold);
}

/* Glassmorphism Card */
.glass-card {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: var(--shadow-md);
  border-radius: var(--radius-md);
  transition: var(--transition-normal);
}

.glass-card-dark {
  background: rgba(28, 28, 28, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-dark);
  border-radius: var(--radius-md);
  color: var(--color-white);
}

/* 6. NAVBAR */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition-normal);
}

.navbar.scrolled {
  padding: 12px 0;
  background: rgba(18, 18, 18, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.nav-logo-img {
  height: 52px;
  width: auto;
  object-fit: contain;
  transition: var(--transition-fast);
}

.navbar.scrolled .nav-logo-img {
  height: 44px;
}

.nav-link {
  color: rgba(255, 255, 255, 0.9);
  font-weight: 400;
  font-size: 0.95rem;
  letter-spacing: 0.5px;
  position: relative;
  padding: 6px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--color-gold-light);
  transition: width 0.3s ease;
  border-radius: var(--radius-full);
}

.nav-link:hover, .nav-link.active {
  color: var(--color-gold-light);
}

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

/* Mobile Drawer */
.mobile-menu-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 320px;
  height: 100vh;
  background: var(--color-charcoal-dark);
  border-left: 1px solid rgba(212, 175, 55, 0.2);
  z-index: 1001;
  padding: 40px 30px;
  transition: right 0.4s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.mobile-menu-drawer.open {
  right: 0;
}

.mobile-nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-fast);
}

.mobile-nav-backdrop.open {
  opacity: 1;
  visibility: visible;
}

/* 7. HERO SECTION */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  background: var(--color-charcoal-dark);
  overflow: hidden;
}

.hero-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: brightness(0.4) contrast(1.1);
  transform: scale(1.05);
  animation: heroZoom 20s infinite alternate cubic-bezier(0.25, 1, 0.5, 1);
}

@keyframes heroZoom {
  0% { transform: scale(1); }
  100% { transform: scale(1.08); }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(0, 0, 0, 0.2) 0%, rgba(18, 18, 18, 0.85) 100%),
              linear-gradient(180deg, rgba(18, 18, 18, 0.6) 0%, rgba(18, 18, 18, 0.9) 100%);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  background: rgba(212, 175, 55, 0.15);
  border: 1px solid rgba(212, 175, 55, 0.4);
  color: var(--color-gold-light);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-gold-light);
  box-shadow: 0 0 10px var(--color-gold-light);
  animation: pulseDot 1.5s infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.3); }
}

/* 8. SERVICES SECTION */
.service-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  border: 1px solid var(--color-mid-grey);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-gold-light));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(184, 134, 11, 0.3);
}

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

.service-icon-wrapper {
  width: 64px;
  height: 64px;
  border-radius: 14px;
  background: var(--color-beige);
  color: var(--color-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 20px;
  transition: var(--transition-normal);
}

.service-card:hover .service-icon-wrapper {
  background: var(--color-gold);
  color: var(--color-white);
  transform: rotateY(180deg);
}

.service-img-wrap {
  width: 100%;
  height: 180px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 20px;
}

.service-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.service-card:hover .service-img-wrap img {
  transform: scale(1.08);
}

/* 9. PORTFOLIO GALLERY */
.portfolio-tab-btn {
  padding: 10px 24px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-mid-grey);
  background: var(--color-white);
  color: var(--color-charcoal);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
}

.portfolio-tab-btn.active, .portfolio-tab-btn:hover {
  background: var(--color-gold);
  color: var(--color-white);
  border-color: var(--color-gold);
  box-shadow: var(--shadow-gold);
}

.portfolio-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  height: 340px;
}

.portfolio-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.portfolio-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0) 30%, rgba(20, 20, 20, 0.9) 100%);
  opacity: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
  transition: opacity 0.4s ease;
}

.portfolio-item:hover img {
  transform: scale(1.08);
}

.portfolio-item:hover .portfolio-overlay {
  opacity: 1;
}

/* 10. BEFORE & AFTER SLIDER */
.before-after-container {
  position: relative;
  width: 100%;
  max-width: 960px;
  height: 520px;
  margin: 0 auto;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  user-select: none;
  touch-action: none;
}

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

.ba-before {
  z-index: 1;
}

.ba-after {
  z-index: 2;
  clip-path: polygon(0 0, 50% 0, 50% 100%, 0 100%);
  will-change: clip-path;
}

.ba-slider-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 4px;
  background: var(--color-white);
  z-index: 3;
  pointer-events: none;
  transform: translateX(-50%);
  box-shadow: 0 0 12px rgba(0, 0, 0, 0.6);
  will-change: left;
}

.ba-slider-button {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-gold);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 0 20px rgba(184, 134, 11, 0.6);
}

.ba-slider-input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: ew-resize;
  z-index: 10;
  margin: 0;
  padding: 0;
  border: none;
  outline: none;
}

.ba-label {
  position: absolute;
  top: 20px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  color: var(--color-white);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  z-index: 4;
}

.ba-label-before { left: 20px; }
.ba-label-after { right: 20px; }

/* 11. PROCESS TIMELINE */
.process-timeline {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
  position: relative;
  margin-top: 40px;
}

.process-timeline::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-gold-light));
  z-index: 0;
}

.process-step-card {
  position: relative;
  z-index: 1;
  text-align: center;
}

.step-number-node {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--color-white);
  border: 3px solid var(--color-gold);
  color: var(--color-gold);
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
}

.process-step-card:hover .step-number-node {
  background: var(--color-gold);
  color: var(--color-white);
  transform: scale(1.1);
  box-shadow: var(--shadow-gold);
}

/* 12. STATS & COUNTERS */
.counter-box {
  text-align: center;
  padding: 30px 20px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

.counter-value {
  font-family: var(--font-heading);
  font-size: 3.2rem;
  font-weight: 700;
  color: var(--color-gold-light);
  line-height: 1;
  margin-bottom: 8px;
}

/* 13. TESTIMONIALS CAROUSEL */
.testimonial-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 40px;
  border: 1px solid var(--color-mid-grey);
  box-shadow: var(--shadow-md);
  position: relative;
}

.quote-icon {
  font-size: 2.5rem;
  color: rgba(184, 134, 11, 0.2);
  position: absolute;
  top: 24px;
  right: 32px;
}

.stars-rating {
  color: var(--color-gold);
  font-size: 1.1rem;
  margin-bottom: 16px;
}

/* 14. BUDGET ESTIMATOR WIDGET */
.estimator-card {
  background: var(--color-charcoal-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid rgba(212, 175, 55, 0.3);
  box-shadow: var(--shadow-dark);
  color: var(--color-white);
}

.estimator-option-btn {
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-white);
  cursor: pointer;
  text-align: left;
  transition: var(--transition-fast);
}

.estimator-option-btn.active, .estimator-option-btn:hover {
  background: rgba(212, 175, 55, 0.15);
  border-color: var(--color-gold);
}

/* 15. FAQ ACCORDION */
.faq-item {
  border-bottom: 1px solid var(--color-mid-grey);
  padding: 20px 0;
}

.faq-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.1rem;
}

.faq-toggle-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-beige);
  color: var(--color-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.faq-item.active .faq-toggle-icon {
  transform: rotate(180deg);
  background: var(--color-gold);
  color: var(--color-white);
}

.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0, 1, 0, 1);
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.faq-item.active .faq-body {
  max-height: 500px;
  margin-top: 14px;
  transition: max-height 0.4s cubic-bezier(1, 0, 1, 0);
}

/* 16. MARQUEE BRAND CAROUSEL */
.brand-marquee {
  display: flex;
  overflow: hidden;
  user-select: none;
  gap: 40px;
}

.brand-marquee-track {
  display: flex;
  gap: 40px;
  animation: marqueeScroll 25s linear infinite;
  white-space: nowrap;
}

@keyframes marqueeScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.brand-badge {
  padding: 12px 28px;
  border-radius: var(--radius-full);
  background: var(--color-white);
  border: 1px solid var(--color-mid-grey);
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--color-charcoal);
  font-size: 0.95rem;
}

/* 17. FLOATING ACTION BUTTONS */
.floating-actions {
  position: fixed;
  bottom: 30px;
  right: 30px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  z-index: 999;
}

.float-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 1.4rem;
  box-shadow: var(--shadow-lg);
  transition: var(--transition-normal);
  position: relative;
}

.float-btn:hover {
  transform: scale(1.1);
}

.float-whatsapp {
  background-color: #25D366;
}

.float-call {
  background-color: var(--color-gold);
}

.float-back-top {
  background-color: var(--color-charcoal);
  opacity: 0;
  visibility: hidden;
}

.float-back-top.show {
  opacity: 1;
  visibility: visible;
}

/* 18. MODALS & LIGHTBOX */
.lightbox-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(12px);
  z-index: 100000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-normal);
  padding: 40px;
}

.lightbox-modal.open {
  opacity: 1;
  visibility: visible;
}

.lightbox-img-wrap {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.8);
}

.lightbox-close {
  position: absolute;
  top: 30px;
  right: 40px;
  color: var(--color-white);
  font-size: 2.5rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.lightbox-close:hover {
  color: var(--color-gold-light);
}

/* 19. RESPONSIVE MEDIA QUERIES */
@media (max-width: 1024px) {
  .process-timeline {
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
  }
  .process-timeline::before {
    display: none;
  }
}

@media (max-width: 768px) {
  .process-timeline {
    grid-template-columns: repeat(2, 1fr);
  }
  .before-after-container {
    height: 380px;
  }
  .ba-after img {
    width: 100vw;
  }
  .hero-section {
    padding-top: 140px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .process-timeline {
    grid-template-columns: 1fr;
  }
  .estimator-card {
    padding: 24px 16px;
  }
  .before-after-container {
    height: 300px;
  }
}