/* =====================================================================
   BOOKSTORE LAYOUT V2 - UNIQUE NAMESPACED CLASSES
   Using 'srbs-' prefix (Sri Sai Ram Book Store) to prevent conflicts
   ===================================================================== */

:root {
  /* Brand Colors */
  --srbs-color-emerald: #7E3B48;
  --srbs-color-forest: #7E3B48;
  --srbs-color-gold: #C8A646;
  --srbs-color-navy: #33291F;
  
  /* Neutrals */
  --srbs-color-white: #FFFFFF;
  --srbs-color-light-gray: #F7F7F7;
  --srbs-color-medium-gray: #E5E7EB;
  --srbs-color-dark-gray: #33291F;
  --srbs-color-text-muted: #6B7280;
  
  /* Spacing */
  --srbs-space-xs: 0.5rem;
  --srbs-space-sm: 1rem;
  --srbs-space-md: 0.8rem;
  --srbs-space-lg: 2rem;
  --srbs-space-xl: 3rem;
  --srbs-space-2xl: 4rem;
  
  /* Border Radius */
  --srbs-radius-sm: 8px;
  --srbs-radius-md: 12px;
  --srbs-radius-lg: 16px;
  --srbs-radius-xl: 20px;
  
  /* Shadows */
  --srbs-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --srbs-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --srbs-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --srbs-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* Sidebar Width */
  --srbs-sidebar-width: 300px;
  
  /* Header Height */
  --srbs-header-height: 70px;
  
  /* Transitions */
  --srbs-transition-fast: 0.2s ease-in-out;
  --srbs-transition-base: 0.3s ease-in-out;
  --srbs-transition-smooth: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

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

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--srbs-color-light-gray);
  color: var(--srbs-color-dark-gray);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Inter', serif;
  font-weight: 600;
  color: var(--srbs-color-emerald);
  line-height: 1.2;
}

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

button {
  font-family: inherit;
  border: none;
  cursor: pointer;
  background: none;
}

/* =====================================================================
   HEADER (.srbs-header)
   ===================================================================== */
.srbs-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--srbs-header-height);
  background: var(--srbs-color-white);
  border-bottom: 1px solid var(--srbs-color-medium-gray);
  z-index: 40;
  box-shadow: var(--srbs-shadow-sm);
}

.srbs-header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--srbs-space-md);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.srbs-logo {
  display: flex;
  align-items: center;
  gap: var(--srbs-space-xs);
}

.srbs-logo h1 {
  font-size: 1.25rem;
  margin: 0;
  color: var(--srbs-color-emerald);
}

.srbs-logo p {
  font-size: 0.75rem;
  color: var(--srbs-color-text-muted);
  font-weight: 500;
  letter-spacing: 0.05em;
  margin: 0;
}

.srbs-header-nav {
  display: flex;
  gap: var(--srbs-space-lg);
}

.srbs-header-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--srbs-color-dark-gray);
  transition: color var(--srbs-transition-fast);
}

.srbs-header-nav a:hover {
  color: var(--srbs-color-emerald);
}

.srbs-mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 30px;
  height: 24px;
  padding: 0;
  background: none;
}

.srbs-mobile-menu-btn span {
  width: 100%;
  height: 2px;
  background: var(--srbs-color-emerald);
  transition: all var(--srbs-transition-fast);
  border-radius: 1px;
}

.srbs-mobile-menu-btn.srbs-active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.srbs-mobile-menu-btn.srbs-active span:nth-child(2) {
  opacity: 0;
}

.srbs-mobile-menu-btn.srbs-active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* =====================================================================
   TWO-COLUMN LAYOUT (.srbs-layout)
   ===================================================================== */
.srbs-layout {
  display: grid;
  grid-template-columns: var(--srbs-sidebar-width) 1fr;
  gap: 0;
  margin-top: var(--srbs-header-height);
  min-height: calc(100vh - var(--srbs-header-height));
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
  margin-top: 124px;
}

/* Sidebar Navigation */
.srbs-sidebar {
  position: sticky;
  top: 124px;
  height: calc(100vh - 124px);
  overflow-y: auto;
  overflow-x: hidden;
  background: var(--srbs-color-white);
  border-right: 1px solid var(--srbs-color-medium-gray);
  z-index: 30;
  scrollbar-width: thin;
  scrollbar-color: var(--srbs-color-medium-gray) transparent;
}

.srbs-sidebar::-webkit-scrollbar {
  width: 6px;
}

.srbs-sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.srbs-sidebar::-webkit-scrollbar-thumb {
  background: var(--srbs-color-medium-gray);
  border-radius: 3px;
}

.srbs-sidebar::-webkit-scrollbar-thumb:hover {
  background: var(--srbs-color-dark-gray);
}

.srbs-sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--srbs-space-md);
  border-bottom: 1px solid var(--srbs-color-medium-gray);
  position: sticky;
  top: 0;
  background:#fffdf8;
  z-index: 1;
}

.srbs-sidebar-header h2 {
  font-size: 1rem;
  margin: 0;
}

.srbs-sidebar-close {
  display: none;
  font-size: 1.5rem;
  color: var(--srbs-color-dark-gray);
  padding: 0;
  background: none;
  cursor: pointer;
}

.srbs-sidebar-backdrop {
  display: none;
  position: fixed;
  top: var(--srbs-header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 25;
}

.srbs-sidebar-backdrop.srbs-active {
  display: block;
}

/* Right Content Area */
.srbs-content {
  background: #fff;
  overflow-y: auto;
  margin-bottom:20px;
  padding: 30px 20px !important;
}

/* =====================================================================
   SECTION HEADER (.srbs-section-header)
   ===================================================================== */
.srbs-section-header {
  animation: srbs-fadeInDown 0.6s var(--srbs-transition-smooth);
}

.srbs-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--srbs-space-sm);
  font-size: 0.9rem;
  color: var(--srbs-color-text-muted);
  margin-bottom: 20px;
  margin-top: 10px;
}

.srbs-breadcrumb a {
  color: var(--srbs-color-emerald);
  font-weight: 500;
}

.srbs-breadcrumb a:hover {
  text-decoration: underline;
}

.srbs-breadcrumb span {
  color: var(--brand-gold) !important;
}

.srbs-section-title {
  font-size: 2.5rem;
  margin-bottom: var(--srbs-space-sm);
}

.srbs-section-subtitle {
  color: var(--srbs-color-text-muted);
  font-size: 1.1rem;
  font-weight: 400;
}

/* =====================================================================
   FOOTER (.srbs-footer)
   ===================================================================== */
.srbs-footer {
  grid-column: 1 / -1;
  background: var(--srbs-color-emerald);
  color: var(--srbs-color-white);
  padding: var(--srbs-space-lg) var(--srbs-space-md);
  text-align: center;
  font-size: 0.9rem;
  border-top: 4px solid var(--srbs-color-gold);
}

.srbs-footer-content {
  max-width: 1400px;
  margin: 0 auto;
}

.srbs-footer-links {
  display: flex;
  gap: var(--srbs-space-lg);
  justify-content: center;
  margin-top: var(--srbs-space-md);
  flex-wrap: wrap;
}

.srbs-footer-links a {
  color: var(--srbs-color-white);
  font-weight: 500;
  transition: color var(--srbs-transition-fast);
}

.srbs-footer-links a:hover {
  color: var(--srbs-color-gold);
}

/* =====================================================================
   EMPTY STATE (.srbs-empty-state)
   ===================================================================== */
.srbs-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  text-align: center;
  color: var(--srbs-color-text-muted);
}

.srbs-empty-state-icon {
  font-size: 4rem;
  margin-bottom: var(--srbs-space-md);
}

.srbs-empty-state h2 {
  font-size: 1.5rem;
  margin-bottom: var(--srbs-space-sm);
  color: var(--srbs-color-dark-gray);
}

/* =====================================================================
   ANIMATIONS
   ===================================================================== */
@keyframes srbs-fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes srbs-fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes srbs-slideInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.srbs-content {
  transition: opacity var(--srbs-transition-base);
}

.srbs-content.srbs-transitioning {
  opacity: 0.7;
}