/* =====================================================================
   MOBILE BREAKPOINTS - HIDE TITLE & SUBTITLE
   Keep BREADCRUMB & FILTER BUTTON only
   ===================================================================== */

/* =====================================================================
   DESKTOP (>1023px)
   ===================================================================== */
/* Default styles in layout-v2.css */

/* =====================================================================
   TABLET (768px - 1023px)
   ===================================================================== */
@media (max-width: 1023px) {
  
  .srbs-content {
    padding: var(--srbs-space-lg);
  }
  
  /* HIDE title and subtitle on tablet completely */
  .srbs-section-title {
    display: none !important;
    visibility: hidden !important;
    height: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
  }
  
  .srbs-section-subtitle {
    display: none !important;
    visibility: hidden !important;
    height: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
  }
  
  /* Keep breadcrumb visible */
  .srbs-breadcrumb {
    display: flex;
  }
  
  :root {
    --srbs-sidebar-width: 260px;
  }
  
  .srbs-books-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .srbs-filter-button {
    display: none !important;
  }
  
  .srbs-tree-item > .srbs-item-btn {
    padding: var(--srbs-space-sm) var(--srbs-space-md);
    font-size: 0.9rem;
  }
  
  .srbs-tree-children .srbs-tree-item > .srbs-item-btn {
    font-size: 0.85rem;
  }
}

/* =====================================================================
   MOBILE (< 768px)
   HIDE TITLE & SUBTITLE - KEEP BREADCRUMB & FILTER BUTTON
   ===================================================================== */
@media (max-width: 767px) {
  
  /* ---- Layout ---- */
  .srbs-book-body {
    justify-content: center;
  }
  
  .srbs-layout {
    grid-template-columns: 1fr;
  }
  
  /* Sidebar drawer */
  .srbs-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    max-width: 80vw;
    height: 100vh;
    background: var(--srbs-color-white);
    z-index: 999;
    overflow-y: auto;
    border-right: 1px solid var(--srbs-color-medium-gray);
    transform: translateX(-100%);
    transition: transform var(--srbs-transition-smooth);
    box-shadow: var(--srbs-shadow-lg);
  }
  
  .srbs-sidebar.srbs-drawer-open {
    transform: translateX(0);
  }
  
  .srbs-sidebar-close {
    display: block;
    position: sticky;
    top: 0;
    border-bottom: 1px solid var(--srbs-color-medium-gray);
  }
  
  .srbs-sidebar-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--srbs-transition-base), visibility var(--srbs-transition-base);
  }
  
  .srbs-sidebar-backdrop.srbs-drawer-open {
    display: block;
    opacity: 1;
    visibility: visible;
  }
  
  /* ---- HIDE TITLE AND SUBTITLE COMPLETELY ---- */
  
  .srbs-section-title {
    display: none !important;
    visibility: hidden !important;
    height: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
  }
  
  .srbs-section-subtitle {
    display: none !important;
    visibility: hidden !important;
    height: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
  }
  
  /* ---- KEEP BREADCRUMB ---- */
  
  .srbs-breadcrumb {
    display: flex;
    font-size: 0.8rem;
    margin-bottom: var(--srbs-space-md);
    flex-wrap: wrap;
  }
  
  /* ---- FILTER BUTTON - VISIBLE & GUARANTEED ---- */
  
  .srbs-filter-button {
    display: inline-flex !important;
    align-items: center;
    padding: 0.65rem 1rem;
    margin-bottom: 0;
    background: var(--rose);
    color: #fff;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all 0.2s ease;
  }
  
  .srbs-filter-button:hover {
    transform: translateY(-2px);
        background: var(--rose-dark);
    box-shadow: var(--srbs-shadow-lg);
  }
  
  .srbs-filter-button:active {
    transform: translateY(0);
  }
  
  .srbs-filter-button:focus-visible {
    outline: 2px solid var(--srbs-color-gold);
    outline-offset: 2px;
  }
  
  /* ---- HIDE OLD MOBILE MENU BUTTON ---- */
  
  .srbs-mobile-menu-btn {
    display: none !important;
  }
  
  .srbs-header-nav {
    display: flex;
    gap: var(--srbs-space-md);
  }
  
  /* ---- Content Area ---- */
  
  .srbs-content {
    padding: var(--srbs-space-md);
    background: var(--srbs-color-white);
  }
  
  .srbs-section-header {
    margin-bottom: var(--srbs-space-md);
  }
  
  /* ---- Books Grid ---- */
  
  .srbs-books-grid {
    grid-template-columns: 1fr;
    gap: var(--srbs-space-md);
  }
  
  /* ---- Book Card MOBILE LAYOUT ---- */
  
  .srbs-book-card {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: var(--srbs-space-md);
    height: auto;
    padding: var(--srbs-space-md);
    border: 1px solid var(--srbs-color-medium-gray);
  }
  
  .srbs-book-image {
    aspect-ratio: 3 / 4;
    border-radius: var(--srbs-radius-md);
    flex-shrink: 0;
    height: auto;
  }
  
  .srbs-book-body {
    padding: 0;
    gap: var(--srbs-space-xs);
  }
  
  .srbs-book-title {
    font-size: 1rem;
  }
  
  .srbs-book-meta {
    font-size: 0.8rem;
  }
  
  .srbs-book-meta-label {
    min-width: 60px;
  }
  
  /* ---- MOBILE NAVIGATION IN DRAWER ---- */
  
  .srbs-category-tree {
    padding: 0;
  }
  
  .srbs-tree-item > .srbs-item-btn {
    padding: var(--srbs-space-sm) var(--srbs-space-md);
    font-size: 0.95rem;
  }
  
  .srbs-tree-children .srbs-tree-item > .srbs-item-btn {
    padding-left: calc(var(--srbs-space-md) + 20px);
    font-size: 0.9rem;
  }
  
  .srbs-tree-children .srbs-tree-children .srbs-tree-item > .srbs-item-btn {
    padding-left: calc(var(--srbs-space-md) + 40px);
    font-size: 0.85rem;
  }
  
  /* ---- Footer ---- */
  
  .srbs-footer {
    padding: var(--srbs-space-md);
    font-size: 0.85rem;
  }
  
  .srbs-footer-links {
    flex-direction: column;
    gap: var(--srbs-space-sm);
  }
}

/* =====================================================================
   SMALL MOBILE (< 480px)
   ===================================================================== */
@media (max-width: 479px) {
  
  .srbs-logo h1 {
    font-size: 1rem;
  }
  
  .srbs-content {
    padding: var(--srbs-space-sm);
  }
  
  /* HIDE title and subtitle completely */
  .srbs-section-title {
    display: none !important;
    visibility: hidden !important;
    height: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
  }
  
  .srbs-section-subtitle {
    display: none !important;
    visibility: hidden !important;
    height: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
  }
  
  /* Keep breadcrumb small */
  .srbs-breadcrumb {
    font-size: 0.75rem;
    margin-bottom: var(--srbs-space-sm);
  }
  
  .srbs-section-header {
    margin-bottom: var(--srbs-space-sm);
  }
  
  .srbs-filter-button {
    display: inline-flex !important;
    font-size: 0.85rem;
    padding: 0.55rem 0.8rem;
    margin-top: var(--srbs-space-sm);
    margin-bottom: 0;
    width: auto;
  }
  
  .srbs-book-card {
    grid-template-columns: 100px 1fr;
    gap: var(--srbs-space-sm);
    padding: var(--srbs-space-sm);
  }
  
  .srbs-book-image {
    min-width: 100px;
  }
  
  .srbs-book-title {
    font-size: 0.95rem;
  }
  
  .srbs-book-meta {
    font-size: 0.75rem;
    gap: 0;
  }
  
  .srbs-book-meta-label {
    min-width: 55px;
  }
  
  .srbs-tree-item > .srbs-item-btn {
    padding: var(--srbs-space-sm) var(--srbs-space-sm);
  }
  
  .srbs-tree-children .srbs-tree-item > .srbs-item-btn {
    padding-left: calc(var(--srbs-space-sm) + 20px);
  }
  
  .srbs-tree-children .srbs-tree-children .srbs-tree-item > .srbs-item-btn {
    padding-left: calc(var(--srbs-space-sm) + 40px);
  }
}

/* =====================================================================
   LANDSCAPE ORIENTATION (Mobile)
   ===================================================================== */
@media (max-height: 600px) and (orientation: landscape) {
  
  :root {
    --srbs-header-height: 60px;
  }
  
  .srbs-header-container {
    padding: 0 var(--srbs-space-sm);
  }
  
  .srbs-logo h1 {
    font-size: 1rem;
  }
  
  /* HIDE title and subtitle in landscape completely */
  .srbs-section-title {
    display: none !important;
    visibility: hidden !important;
    height: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
  }
  
  .srbs-section-subtitle {
    display: none !important;
    visibility: hidden !important;
    height: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
  }
  
  .srbs-breadcrumb {
    font-size: 0.95rem;
    margin-bottom: var(--srbs-space-lg);
  }
  
  .srbs-content {
    padding: var(--srbs-space-sm);
  }
  
  .srbs-book-card {
    padding: var(--srbs-space-sm);
  }
  
  .srbs-filter-button {
    display: inline-flex !important;
    padding: 0.35rem 0.8rem;
    font-size: 0.85rem;
    margin-top: var(--srbs-space-sm);
    width: auto;
  }
}

/* =====================================================================
   HIGH DPI DEVICES (Retina)
   ===================================================================== */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  
  .srbs-header {
    border-bottom-width: 0.5px;
  }
  
  .srbs-sidebar {
    border-right-width: 0.5px;
  }
  
  .srbs-book-card {
    border-width: 0.5px;
  }
}

/* =====================================================================
   TOUCH DEVICE ADJUSTMENTS
   ===================================================================== */
@media (hover: none) and (pointer: coarse) {
  
  .srbs-item-btn {
    padding-top: calc(var(--srbs-space-md) + 4px);
    padding-bottom: calc(var(--srbs-space-md) + 4px);
  }
  
  .srbs-filter-button {
    display: inline-flex !important;
    padding: 0.75rem 1.2rem;
    min-height: 48px;
    min-width: 48px;
  }
  
  .srbs-book-card:hover {
    transform: none;
  }
  
  .srbs-book-card:active {
    box-shadow: var(--srbs-shadow-xl);
    transform: scale(0.98);
  }
}

/* =====================================================================
   PRINT STYLES
   ===================================================================== */
@media print {
  
  .srbs-header,
  .srbs-sidebar,
  .srbs-footer,
  .srbs-mobile-menu-btn,
  .srbs-filter-button {
    display: none;
  }
  
  .srbs-layout {
    grid-template-columns: 1fr;
    margin-top: 0;
  }
  
  .srbs-content {
    background: var(--srbs-color-white);
    padding: 0;
  }
  
  .srbs-book-card {
    page-break-inside: avoid;
    border: 1px solid #000;
  }
  
  .srbs-books-grid {
    gap: 1cm;
  }
}