/* ==========================================================================
   SIDDHI BOOK STATIONARY - Main Stylesheet
   Google Material Design inspired modern, clean, and elegant UI
   ========================================================================== */

/* --- CSS Variables & Theme Configuration --- */
:root {
  /* Color Palette */
  --primary: #2563EB;
  --primary-hover: #1D4ED8;
  --secondary: #3B82F6;
  --accent: #F59E0B;
  --accent-hover: #D97706;
  --background: #F8FAFC;
  --surface: #FFFFFF;
  --dark: #1F2937;
  --text-muted: #6B7280;
  --border-color: #E2E8F0;

  /* Elevation / Shadows (Material Design Inspired) */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -1px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.03);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 10px 10px -5px rgba(0,0,0,0.03);

  /* Geometry & Typography */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --font-family: 'Poppins', sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1280px;
}

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

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

body {
  font-family: var(--font-family);
  background-color: var(--background);
  color: var(--dark);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

ul {
  list-style: none;
}

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

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

.section-padding {
  padding: 80px 0;
}

.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.text-accent { color: var(--accent); }

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 50px auto;
}

.section-header .badge {
  display: inline-block;
  padding: 6px 16px;
  background-color: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.section-header h2 {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 12px;
  line-height: 1.25;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  gap: 8px;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--surface);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background-color: var(--primary);
  color: var(--surface);
  transform: translateY(-2px);
}

.btn-accent {
  background-color: var(--accent);
  color: var(--surface);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.25);
}

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

/* --- Top Utility Bar --- */
.top-bar {
  background-color: var(--dark);
  color: #9CA3AF;
  font-size: 0.85rem;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

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

.top-bar-info {
  display: flex;
  gap: 20px;
}

.top-bar-info item {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* --- Sticky Navigation Bar --- */
.navbar {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--surface);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
  padding: 4px 0;
}

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

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

.logo-icon {
  width: 44px;
  height: 44px;
  background-color: var(--primary);
  color: var(--surface);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
}

.logo-text h1 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--dark);
  line-height: 1.1;
  letter-spacing: -0.2px;
}

.logo-text span {
  font-size: 0.725rem;
  color: var(--primary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

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

.nav-link {
  font-weight: 500;
  color: #4B5563;
  position: relative;
  padding: 6px 0;
}

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

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

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

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
}

.bar {
  width: 25px;
  height: 3px;
  background-color: var(--dark);
  border-radius: 2px;
  transition: var(--transition);
}

/* --- Hero Banner Section --- */
.hero {
  position: relative;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(59, 130, 246, 0.12) 100%), #FFFFFF;
  padding: 90px 0;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.hero-content .badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background-color: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 20px;
}

.hero-content h1 {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--dark);
  margin-bottom: 20px;
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 35px;
  max-width: 520px;
}

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

.hero-image-wrapper {
  position: relative;
}

.hero-img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  object-fit: cover;
}

.experience-card {
  position: absolute;
  bottom: -20px;
  left: -20px;
  background-color: var(--surface);
  padding: 20px 24px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 16px;
  border: 1px solid var(--border-color);
}

.experience-card .num {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.experience-card .text {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--dark);
  line-height: 1.3;
}

/* --- Features/Stats Bar --- */
.features-bar {
  background-color: var(--surface);
  padding: 40px 0;
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.feature-icon {
  width: 56px;
  height: 56px;
  background-color: rgba(37, 99, 235, 0.08);
  color: var(--primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.feature-info h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 4px;
}

.feature-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- Product Categories Cards --- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 30px;
}

.product-card {
  background-color: var(--surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.3);
}

.product-img-holder {
  position: relative;
  height: 200px;
  overflow: hidden;
  background-color: #E2E8F0;
}

.product-img-holder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.product-card:hover .product-img-holder img {
  transform: scale(1.08);
}

.product-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 10px;
}

.product-content p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 16px;
  flex-grow: 1;
}

.product-tag {
  display: inline-block;
  font-size: 0.775rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* --- Why Choose Us Section --- */
.why-us-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
}

.why-card {
  background-color: var(--surface);
  padding: 32px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.why-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.why-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  margin-bottom: 20px;
}

.why-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 10px;
}

.why-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* --- Customer Reviews Section --- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
}

.review-card {
  background-color: var(--surface);
  padding: 32px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  position: relative;
}

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

.review-card p {
  font-style: italic;
  color: #4B5563;
  margin-bottom: 20px;
  font-size: 0.95rem;
}

.client-info h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
}

.client-info span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- Call To Action (CTA) --- */
.cta-section {
  background: linear-gradient(135deg, var(--primary), #1D4ED8);
  color: var(--surface);
  border-radius: var(--radius-lg);
  padding: 60px;
  text-align: center;
  box-shadow: var(--shadow-xl);
  margin-bottom: 80px;
}

.cta-section h2 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 1.1rem;
  opacity: 0.9;
  max-width: 650px;
  margin: 0 auto 30px auto;
}

/* --- Gallery Styles & Lightbox --- */
.gallery-filters {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
}

.filter-btn {
  padding: 10px 22px;
  background-color: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover, .filter-btn.active {
  background-color: var(--primary);
  color: var(--surface);
  border-color: var(--primary);
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.2);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  height: 250px;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.gallery-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0) 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 20px;
  color: var(--surface);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.gallery-item:hover img {
  transform: scale(1.1);
}

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

.gallery-overlay h3 {
  font-size: 1.1rem;
  font-weight: 600;
}

.gallery-overlay span {
  font-size: 0.8rem;
  opacity: 0.8;
}

/* Lightbox Modal */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.lightbox.active {
  display: flex;
}

.lightbox-content {
  max-width: 90%;
  max-height: 85vh;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-xl);
}

.lightbox-close {
  position: absolute;
  top: 25px;
  right: 25px;
  color: var(--surface);
  font-size: 2.5rem;
  cursor: pointer;
  line-height: 1;
}

/* --- Page Header Banner (Sub-pages) --- */
.page-header {
  background: linear-gradient(135deg, var(--dark) 0%, #111827 100%);
  color: var(--surface);
  padding: 60px 0;
  text-align: center;
}

.page-header h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  font-size: 0.9rem;
  color: #9CA3AF;
}

.breadcrumb a {
  color: var(--surface);
}

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

/* --- Contact Page Styles --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 50px;
}

.contact-card {
  background-color: var(--surface);
  padding: 30px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  margin-bottom: 24px;
}

.contact-info-item {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
}

.contact-info-item:last-child {
  margin-bottom: 0;
}

.contact-info-icon {
  width: 44px;
  height: 44px;
  background-color: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-form {
  background-color: var(--surface);
  padding: 40px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: var(--dark);
}

.form-control {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: var(--font-family);
  font-size: 0.95rem;
  transition: var(--transition);
  background-color: #FAFAFA;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  background-color: var(--surface);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

.map-container {
  width: 100%;
  height: 350px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  margin-top: 30px;
}

.map-container iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

/* --- About & Privacy Content Styles --- */
.content-box {
  background-color: var(--surface);
  padding: 40px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  margin-bottom: 30px;
}

.content-box h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 16px;
}

.content-box h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--dark);
  margin: 20px 0 10px 0;
}

.content-box p {
  color: #4B5563;
  margin-bottom: 16px;
  font-size: 1rem;
}

.content-box ul {
  margin-bottom: 20px;
  padding-left: 20px;
}

.content-box li {
  list-style-type: disc;
  color: #4B5563;
  margin-bottom: 8px;
}

/* FAQ Accordion Styling */
.faq-accordion {
  margin-top: 20px;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 18px 24px;
  background-color: var(--surface);
  text-align: left;
  font-weight: 600;
  font-size: 1rem;
  color: var(--dark);
  border: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

.faq-question:hover {
  background-color: rgba(37, 99, 235, 0.03);
}

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  background-color: #FAFAFA;
  color: var(--text-muted);
}

.faq-item.active .faq-answer {
  padding: 18px 24px;
  max-height: 300px;
}

/* --- Footer --- */
.footer {
  background-color: var(--dark);
  color: #9CA3AF;
  padding-top: 70px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr 1.5fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-col h3 {
  color: var(--surface);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 20px;
  position: relative;
}

.footer-col h3::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 35px;
  height: 2px;
  background-color: var(--primary);
  border-radius: var(--radius-full);
}

.footer-col p {
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.footer-links li {
  margin-bottom: 10px;
}

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

.footer-bottom {
  background-color: #111827;
  padding: 24px 0;
  border-top: 1px solid rgba(255,255,255,0.05);
  font-size: 0.875rem;
  text-align: center;
}

/* Back To Top Button */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background-color: var(--primary);
  color: var(--surface);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
  border: none;
}

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

.back-to-top:hover {
  background-color: var(--primary-hover);
  transform: translateY(-4px);
}