/* ===================================
   千尚书院 · 首页样式
   =================================== */

/* ---------- Tokens ---------- */
:root {
  --c-bg:          #0a0a0f;
  --c-bg-card:     #12121a;
  --c-surface:     #1e1e2a;
  --c-border:      rgba(255, 255, 255, 0.06);
  --c-border-active: rgba(255, 215, 120, 0.3);
  --c-text:        #e8e6e1;
  --c-text-dim:    #9a978f;
  --c-text-heading:#fff;
  --c-accent:      #d4a853;
  --c-accent-glow: rgba(212, 168, 83, 0.15);
  --c-accent-soft: #c49a42;
  --ff-serif:  'Noto Serif SC', 'Georgia', serif;
  --ff-sans:   'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
  --r-sm: 6px; --r-md: 12px; --r-lg: 20px;
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --dur: 0.35s;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--ff-sans);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.75;
  min-height: 100vh;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px) saturate(1.6);
  -webkit-backdrop-filter: blur(20px) saturate(1.6);
  background: rgba(10, 10, 15, 0.8);
  border-bottom: 1px solid var(--c-border);
  transition: all var(--dur) var(--ease);
}

.site-header.scrolled {
  background: rgba(10, 10, 15, 0.95);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0.6rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.logo-img {
  width: 44px;
  height: 44px;
  object-fit: contain;
}

.logo-text { display: flex; flex-direction: column; }

.logo-cn {
  font-family: var(--ff-serif);
  font-weight: 900;
  font-size: 1.2rem;
  color: var(--c-accent);
  letter-spacing: 0.15em;
  line-height: 1.3;
}

.logo-en {
  font-size: 0.6rem;
  letter-spacing: 0.35em;
  color: var(--c-text-dim);
  text-transform: uppercase;
  opacity: 0.7;
}

/* Search */
.search-box {
  position: relative;
}

.search-box input {
  width: 240px;
  padding: 0.5rem 1rem 0.5rem 2.2rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 50px;
  font-family: var(--ff-sans);
  font-size: 0.82rem;
  color: var(--c-text);
  outline: none;
  transition: all var(--dur) var(--ease);
}

.search-box input:focus {
  border-color: var(--c-border-active);
  box-shadow: 0 0 20px var(--c-accent-glow);
  width: 300px;
}

.search-box input::placeholder { color: var(--c-text-dim); opacity: 0.6; }

.search-box::before {
  content: '🔍';
  position: absolute;
  left: 0.8rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.8rem;
  pointer-events: none;
}

/* ---------- Banner Carousel ---------- */
.banner-carousel {
  position: relative;
  width: 100%;
  height: clamp(320px, 55vh, 520px);
  overflow: hidden;
  background: var(--c-bg);
}

.banner-track {
  position: relative;
  width: 100%;
  height: 100%;
}

.banner-slide {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 4rem;
  padding: 3rem clamp(2rem, 8vw, 6rem);
  opacity: 0;
  transition: opacity 0.8s ease;
  pointer-events: none;
}

.banner-slide.active {
  opacity: 1;
  pointer-events: auto;
}

.slide-content {
  flex: 1;
  max-width: 500px;
  animation: fadeUp 0.6s ease both;
}

.slide-tag {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  color: var(--c-accent);
  background: rgba(212,168,83,0.1);
  border: 1px solid rgba(212,168,83,0.2);
  padding: 0.3rem 0.8rem;
  border-radius: 50px;
  margin-bottom: 1.2rem;
}

.slide-title {
  font-family: var(--ff-serif);
  font-weight: 900;
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  color: var(--c-text-heading);
  margin-bottom: 0.8rem;
  line-height: 1.4;
  letter-spacing: 0.05em;
}

.slide-desc {
  font-size: 0.9rem;
  color: var(--c-text-dim);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.slide-cta {
  display: inline-block;
  padding: 0.6rem 1.8rem;
  background: linear-gradient(135deg, var(--c-accent), var(--c-accent-soft));
  color: #0a0a0f;
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: 50px;
  transition: all 0.3s ease;
  letter-spacing: 0.05em;
}

.slide-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(212,168,83,0.3);
}

.slide-cta.dim {
  background: var(--c-surface);
  color: var(--c-text-dim);
  border: 1px solid var(--c-border);
}

.slide-visual {
  flex-shrink: 0;
}

.slide-cover-fan {
  position: relative;
  width: 260px;
  height: 300px;
  flex-shrink: 0;
  overflow: visible;
}

.slide-cover-fan img {
  position: absolute;
  width: 150px;
  height: 200px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.6);
  transition: transform 0.4s ease;
  max-width: none;
}

.fan-1 { top: 10px; left: 0; transform: rotate(-8deg); z-index: 3; }
.fan-2 { top: 30px; left: 60px; transform: rotate(2deg); z-index: 2; }
.fan-3 { top: 50px; left: 110px; transform: rotate(10deg); z-index: 1; }

.banner-slide.active .fan-1 { animation: fanIn1 0.6s ease 0.2s both; }
.banner-slide.active .fan-2 { animation: fanIn2 0.6s ease 0.35s both; }
.banner-slide.active .fan-3 { animation: fanIn3 0.6s ease 0.5s both; }

@keyframes fanIn1 { from { opacity:0; transform: rotate(-8deg) translateY(30px); } to { opacity:1; transform: rotate(-8deg) translateY(0); }}
@keyframes fanIn2 { from { opacity:0; transform: rotate(2deg) translateY(30px); } to { opacity:1; transform: rotate(2deg) translateY(0); }}
@keyframes fanIn3 { from { opacity:0; transform: rotate(10deg) translateY(30px); } to { opacity:1; transform: rotate(10deg) translateY(0); }}

.slide-icon-group {
  display: flex;
  gap: 1.5rem;
  font-size: 3rem;
  opacity: 0.3;
  filter: grayscale(0.5);
}

/* Banner arrows */
.banner-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(10px);
  color: #fff;
  font-size: 1.4rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.banner-arrow:hover {
  background: rgba(212,168,83,0.2);
  border-color: var(--c-accent);
}

.banner-arrow.prev { left: 1.5rem; }
.banner-arrow.next { right: 1.5rem; }

/* Banner dots */
.banner-dots {
  position: absolute;
  bottom: 1.2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  gap: 0.5rem;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,0.25);
  cursor: pointer;
  transition: all 0.3s ease;
}

.dot.active {
  width: 24px;
  border-radius: 4px;
  background: var(--c-accent);
}

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

/* ---------- Quick Entry ---------- */
.quick-entry {
  max-width: 900px;
  margin: -2rem auto 0;
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: center;
  gap: clamp(1.5rem, 4vw, 3rem);
  position: relative;
  z-index: 20;
  background: rgba(18,18,26,0.85);
  backdrop-filter: blur(15px);
  border: 1px solid var(--c-border);
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

.qe-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.35s ease;
  cursor: pointer;
}

.qe-item:hover { transform: translateY(-4px); }
.qe-item:hover .qe-img {
  border-color: var(--c-border-active);
  box-shadow: 0 0 20px rgba(212,168,83,0.2);
  transform: scale(1.08);
}
.qe-item:hover .qe-label { color: var(--c-accent); }

.qe-img {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--c-border);
  transition: all 0.35s ease;
  background: var(--c-bg-card);
}

.qe-label {
  font-size: 0.72rem;
  color: var(--c-text-dim);
  letter-spacing: 0.05em;
  transition: color 0.3s ease;
}

/* ---------- Portal Sections ---------- */
.portal-section {
  max-width: 1400px;
  margin: 3rem auto;
  padding: 0 1.5rem;
}

.section-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--c-border);
}

.section-title {
  font-family: var(--ff-serif);
  font-weight: 900;
  font-size: 1.5rem;
  color: var(--c-text-heading);
  letter-spacing: 0.1em;
  margin-bottom: 0.3rem;
}

.section-icon {
  margin-right: 0.3rem;
}

.section-subtitle {
  font-size: 0.82rem;
  color: var(--c-text-dim);
  letter-spacing: 0.05em;
}

/* ---------- Coming Soon Placeholder ---------- */
.coming-soon-placeholder {
  text-align: center;
  padding: 4rem 2rem;
  background: linear-gradient(135deg, rgba(30,30,42,0.6), rgba(18,18,26,0.8));
  border: 1px dashed rgba(255,255,255,0.08);
  border-radius: 16px;
}

.cs-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.4;
}

.cs-title {
  font-family: var(--ff-serif);
  font-size: 1.3rem;
  color: var(--c-text-dim);
  margin-bottom: 0.5rem;
  letter-spacing: 0.15em;
}

.cs-desc {
  font-size: 0.85rem;
  color: var(--c-text-dim);
  opacity: 0.5;
  margin-bottom: 1.2rem;
}

.cs-tags {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.cs-tags span {
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--c-border);
  border-radius: 50px;
  font-size: 0.72rem;
  color: var(--c-text-dim);
  opacity: 0.5;
}

/* ---------- Tools Grid ---------- */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.2rem;
}

.tool-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 14px;
  padding: 1.8rem 1.5rem;
  text-align: center;
  transition: all 0.35s ease;
  position: relative;
  overflow: hidden;
}

.tool-card:hover {
  transform: translateY(-4px);
  border-color: var(--c-border-active);
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
}

.tool-icon {
  font-size: 2.2rem;
  margin-bottom: 0.8rem;
}

.tool-name {
  font-family: var(--ff-serif);
  font-size: 1rem;
  color: var(--c-text-heading);
  margin-bottom: 0.3rem;
  letter-spacing: 0.1em;
}

.tool-desc {
  font-size: 0.75rem;
  color: var(--c-text-dim);
  margin-bottom: 0.8rem;
}

.tool-status {
  display: inline-block;
  font-size: 0.65rem;
  padding: 0.2rem 0.6rem;
  background: rgba(212,168,83,0.08);
  color: var(--c-accent-soft);
  border: 1px solid rgba(212,168,83,0.15);
  border-radius: 50px;
  letter-spacing: 0.1em;
}

/* ---------- Category Filter (inline, not sticky) ---------- */
.cat-filter {
  padding: 0.8rem 0;
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  margin-bottom: 1rem;
}

.cat-filter::-webkit-scrollbar { display: none; }

.cf-btn {
  flex-shrink: 0;
  padding: 0.4rem 1rem;
  border: 1px solid var(--c-border);
  border-radius: 50px;
  background: transparent;
  color: var(--c-text-dim);
  font-family: var(--ff-sans);
  font-size: 0.78rem;
  cursor: pointer;
  transition: all var(--dur) var(--ease);
  white-space: nowrap;
}

.cf-btn:hover { border-color: var(--c-border-active); color: var(--c-text); }

.cf-btn.active {
  background: rgba(212,168,83,0.12);
  color: var(--c-accent);
  border-color: var(--c-border-active);
}

/* ---------- Shelves ---------- */
.shelves {
  padding: 0 0 1rem;
}

.shelf {
  margin-bottom: 2.5rem;
}

.shelf-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.2rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--c-border);
}

.shelf-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.shelf-icon { font-size: 1.3rem; }

.shelf-name {
  font-family: var(--ff-serif);
  font-weight: 900;
  font-size: 1.2rem;
  color: var(--c-text-heading);
  letter-spacing: 0.15em;
}

.shelf-count {
  font-size: 0.7rem;
  color: var(--c-accent-soft);
  background: rgba(212,168,83,0.1);
  padding: 0.15rem 0.5rem;
  border-radius: 50px;
  letter-spacing: 0.1em;
}

.shelf-desc {
  font-size: 0.78rem;
  color: var(--c-text-dim);
  letter-spacing: 0.1em;
}

/* Shelf Track - horizontal scrolling row */
.shelf-track {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  padding-bottom: 2rem;
  padding-top: 1rem;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.1) transparent;
  
  /* Phase 7: Edge Fade Mask */
  mask-image: linear-gradient(to right, transparent 0%, black 2%, black 98%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 2%, black 98%, transparent 100%);
}

.shelf-track::-webkit-scrollbar { height: 4px; }
.shelf-track::-webkit-scrollbar-track { background: transparent; }
.shelf-track::-webkit-scrollbar-thumb { background: rgba(212,168,83,0.15); border-radius: 10px; }

/* ---------- Book Card ---------- */
.book-card {
  flex-shrink: 0;
  width: 140px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  cursor: default;
  scroll-snap-align: start;
}

.book-card.available { cursor: pointer; }

/* 3D Book */
.book-3d {
  position: relative;
  perspective: 800px;
  margin-bottom: 0.6rem;
  width: 140px;
}

.book-cover {
  position: relative;
  aspect-ratio: 3/4;
  border-radius: var(--r-sm);
  overflow: hidden;
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  transition: all 0.5s var(--ease);
  transform-origin: left center;
  box-shadow: 3px 3px 10px rgba(0,0,0,0.4), 6px 0 6px -3px rgba(0,0,0,0.3);
}

.book-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.book-spine {
  position: absolute;
  left: -10px; top: 2px; bottom: 2px;
  width: 10px;
  background: linear-gradient(90deg, #1a1520, #2a2535);
  border-radius: 3px 0 0 3px;
  transform: rotateY(-30deg);
  transform-origin: right;
  transition: all 0.5s var(--ease);
  box-shadow: -2px 0 6px rgba(0,0,0,0.5);
}

.book-spine.coming { background: linear-gradient(90deg, #15151f, #1d1d28); }

/* Hover */
.book-card.available:hover .book-cover {
  transform: rotateY(-12deg) translateX(6px);
  box-shadow: 6px 6px 20px rgba(0,0,0,0.5), 10px 0 15px -4px rgba(0,0,0,0.4), 0 0 30px var(--c-accent-glow);
  border-color: var(--c-border-active);
}

.book-card.available:hover .book-spine {
  transform: rotateY(-38deg);
  background: linear-gradient(90deg, #2a2030, #3a3040);
}

.book-card.available:hover .book-name { color: var(--c-accent); }

/* Badge & Lock */
.book-badge {
  position: absolute;
  top: 6px; right: 6px;
  background: rgba(212,168,83,0.9);
  color: #0a0a0f;
  font-size: 0.55rem;
  font-weight: 700;
  padding: 0.15rem 0.4rem;
  border-radius: 50px;
  letter-spacing: 0.05em;
}

.book-lock {
  position: absolute;
  bottom: 8px; left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(8px);
  color: var(--c-text-dim);
  font-size: 0.6rem;
  padding: 0.2rem 0.5rem;
  border-radius: 50px;
  white-space: nowrap;
  border: 1px solid var(--c-border);
}

/* Coming soon cover */
.book-cover.coming { opacity: 0.45; }

/* Placeholder content */
.book-ph {
  position: absolute; inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, var(--c-surface) 0%, var(--c-bg-card) 100%);
  padding: 0.8rem;
}

.ph-logo {
  width: 40px; height: 40px;
  border-radius: 6px;
  margin-bottom: 0.5rem;
  opacity: 0.5;
  object-fit: contain;
}

.ph-title {
  font-family: var(--ff-serif);
  font-size: 0.85rem;
  font-weight: 900;
  color: var(--c-text-dim);
  margin-bottom: 0.2rem;
  line-height: 1.3;
}

.ph-sub {
  font-size: 0.6rem;
  color: var(--c-text-dim);
  opacity: 0.5;
  line-height: 1.3;
}

/* Book info */
.book-info { padding: 0 0.2rem; }

.book-name {
  font-family: var(--ff-serif);
  font-weight: 900;
  font-size: 0.85rem;
  color: var(--c-text-heading);
  margin-bottom: 0.1rem;
  letter-spacing: 0.05em;
  transition: color var(--dur) var(--ease);
  line-height: 1.4;
}

.book-name.dim { color: var(--c-text-dim); opacity: 0.5; }

.book-subtitle {
  font-size: 0.65rem;
  color: var(--c-text-dim);
  margin-bottom: 0.3rem;
}

.book-subtitle.dim { opacity: 0.4; }

.book-tags {
  display: flex;
  gap: 0.25rem;
  justify-content: center;
  flex-wrap: wrap;
}

.book-tags span {
  background: var(--c-surface-hover);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-border);
}

.match-reason {
  font-size: 0.72rem;
  color: var(--c-bg);
  background: var(--c-primary);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem;
  display: inline-block;
  font-weight: bold;
}

/* ---------- Search Results ---------- */
.search-results {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
}

.search-results.hidden { display: none; }
.shelves.hidden { display: none; }

.sr-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--c-border);
}

.sr-header h2 {
  font-family: var(--ff-serif);
  font-size: 1.1rem;
  color: var(--c-text-heading);
}

.sr-clear {
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--c-border);
  border-radius: 50px;
  background: transparent;
  color: var(--c-text-dim);
  font-family: var(--ff-sans);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--dur) var(--ease);
}

.sr-clear:hover { border-color: var(--c-accent); color: var(--c-accent); }

.sr-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
}

.sr-empty {
  color: var(--c-text-dim);
  font-size: 0.9rem;
  padding: 2rem;
  text-align: center;
  width: 100%;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--c-border);
  padding: 2.5rem 1.5rem;
  text-align: center;
}

.footer-inner { max-width: 600px; margin: 0 auto; }

.footer-logo {
  width: 40px; height: 40px;
  margin: 0 auto 0.8rem;
  opacity: 0.5;
  object-fit: contain;
}

.footer-text {
  font-family: var(--ff-serif);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--c-text-dim);
  letter-spacing: 0.2em;
  margin-bottom: 0.4rem;
}

.footer-copy {
  font-size: 0.7rem;
  color: var(--c-text-dim);
  opacity: 0.4;
}

/* ============ Mobile: Reading App Style ============ */
@media (max-width: 768px) {
  /* --- Header: compact app bar --- */
  .header-inner { padding: 0.4rem 0.8rem; }
  .logo-img { width: 30px; height: 30px; }
  .logo-cn { font-size: 0.9rem; letter-spacing: 0.08em; }
  .logo-en { display: none; }
  .group-link { display: none; }
  .search-box input { width: 120px; font-size: 0.72rem; padding: 0.4rem 0.6rem 0.4rem 1.6rem; }
  .search-box input:focus { width: 160px; }
  .search-box::before { font-size: 0.6rem; left: 0.5rem; }

  /* --- Mobile: restyle desktop sections for phone --- */
  .banner-carousel { height: 200px; }
  .banner-slide { flex-direction: column; gap: 0.8rem; padding: 1.5rem 1.2rem; text-align: center; }
  .slide-visual { display: none; }
  .slide-tag { font-size: 0.65rem; padding: 0.2rem 0.6rem; margin-bottom: 0.6rem; }
  .slide-title { font-size: 1.1rem; margin-bottom: 0.4rem; }
  .slide-desc { font-size: 0.75rem; margin-bottom: 0.8rem; line-height: 1.5; }
  .slide-cta { font-size: 0.75rem; padding: 0.5rem 1.4rem; }
  .banner-arrow { width: 30px; height: 30px; font-size: 1rem; }
  .banner-arrow.prev { left: 0.5rem; }
  .banner-arrow.next { right: 0.5rem; }
  .banner-dots { bottom: 0.6rem; }
  .dot { width: 6px; height: 6px; }
  .dot.active { width: 18px; }

  .quick-entry { 
    gap: 0.8rem; padding: 0.8rem 1rem; margin: -1rem 0.6rem 0; 
    border-radius: 12px; overflow-x: auto; flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
  }
  .quick-entry::-webkit-scrollbar { display: none; }
  .qe-item { min-width: 52px; }
  .qe-img { width: 40px; height: 40px; }
  .qe-label { font-size: 0.55rem; }

  #section-featured { display: none; }
  #section-modern { display: none; }
  #section-tools { display: none; }
  .portal-section { padding: 0; margin: 0.8rem 0 0; }

  /* --- Mobile Hero Banner --- */
  .continue-reading-container {
    position: relative !important;
    bottom: auto !important;
    right: auto !important;
    display: none;
    padding: 0.8rem;
  }

  /* --- Shelves: full-width app layout --- */
  .shelves { padding: 0; }

  .shelf {
    margin-bottom: 0;
    padding: 1.2rem 0 0.8rem;
    border-bottom: 1px solid rgba(255,255,255,0.04);
  }

  .shelf-header {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.6rem;
    padding: 0 1rem 0.5rem;
    border-bottom: none;
  }

  .shelf-left { gap: 0.4rem; }
  .shelf-icon { font-size: 1.1rem; }
  .shelf-name { font-size: 1rem; letter-spacing: 0.08em; }
  .shelf-count { font-size: 0.6rem; padding: 0.1rem 0.4rem; }
  .shelf-desc { font-size: 0.7rem; }

  /* --- Book Track: large covers, snap scroll --- */
  .shelf-track {
    gap: 0.8rem;
    padding: 0.3rem 1rem 1rem;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    mask-image: none;
    -webkit-mask-image: none;
  }

  /* --- Book Cards: bigger, cleaner --- */
  .book-card {
    width: 110px;
    scroll-snap-align: start;
  }

  .book-3d { width: 110px; perspective: 600px; margin-bottom: 0.4rem; }
  .book-spine { width: 6px; left: -6px; }

  .book-cover {
    aspect-ratio: 3/4;
    border-radius: 6px;
    box-shadow: 2px 2px 8px rgba(0,0,0,0.4);
  }

  .book-info { padding: 0; }
  .book-name { font-size: 0.78rem; letter-spacing: 0.02em; line-height: 1.3; }
  .book-subtitle { font-size: 0.6rem; margin-bottom: 0.1rem; }
  .book-tags { display: none; }
  .book-badge { font-size: 0.5rem; padding: 0.1rem 0.3rem; top: 4px; right: 4px; }
  .book-lock { font-size: 0.5rem; padding: 0.1rem 0.4rem; }

  /* 3D hover disabled on mobile for performance */
  .book-card.available:hover .book-cover { transform: none; box-shadow: 2px 2px 8px rgba(0,0,0,0.4); }
  .book-card.available:hover .book-spine { transform: rotateY(-30deg); }

  /* --- Category Filter: pill tabs --- */
  .cat-filter {
    padding: 0.6rem 1rem;
    gap: 0.3rem;
    margin-bottom: 0.3rem;
  }

  .cf-btn {
    padding: 0.35rem 0.8rem;
    font-size: 0.72rem;
    border-radius: 20px;
  }

  /* --- Masterclass Grid --- */
  .mc-grid { grid-template-columns: 1fr; gap: 0.8rem; }
  .mc-card { height: 140px; }
  .mc-cover { width: 100px; }
  .mc-title { font-size: 1rem; }
  .mc-badge { font-size: 0.6rem; margin-bottom: 0.5rem; }

  /* --- Tools --- */
  .tools-grid { grid-template-columns: repeat(2, 1fr); gap: 0.8rem; }
  .tool-card { padding: 1.2rem 1rem; }
  .tool-icon { font-size: 1.6rem; }
  .tool-name { font-size: 0.85rem; }

  /* --- Search --- */
  .search-results { padding: 0 1rem 2rem; }
  .sr-grid { gap: 0.8rem; }

  /* --- Footer: compact --- */
  .site-footer { padding: 2rem 1rem; }
  .footer-logo { width: 30px; height: 30px; }
  .footer-text { font-size: 0.75rem; letter-spacing: 0.1em; }
}

@media (max-width: 400px) {
  .book-card { width: 95px; }
  .book-3d { width: 95px; }
  .book-name { font-size: 0.72rem; }
  .shelf-track { gap: 0.6rem; padding: 0.3rem 0.8rem 0.8rem; }
  .shelf-name { font-size: 0.9rem; }
}

/* ---------- Continue Reading Banner (Floating Capsule) ---------- */
.continue-reading-container {
  display: none; /* hidden if no progress */
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 999;
  animation: fadeUp 0.5s ease both;
}

.cr-card {
  background: rgba(20, 16, 14, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(212, 168, 83, 0.4);
  border-radius: 50px;
  padding: 0.8rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
  box-shadow: 0 10px 40px rgba(0,0,0,0.8), 0 0 20px rgba(212,168,83,0.15);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.cr-card:hover {
  transform: translateY(-5px) scale(1.03);
  border-color: var(--c-accent);
  box-shadow: 0 15px 50px rgba(0,0,0,0.9), 0 0 30px rgba(212,168,83,0.35);
}
.cr-info {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.cr-icon {
  font-size: 1.2rem;
}

.cr-text {
  font-size: 0.95rem;
  color: var(--c-text-sec);
}

.cr-text strong {
  color: var(--c-text-primary);
  font-family: var(--ff-serif);
}

.cr-btn {
  background: var(--c-text-primary);
  color: var(--c-bg);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: opacity 0.3s;
}

.cr-btn:hover {
  opacity: 0.8;
}

@media (max-width: 600px) {
  .cr-banner {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .cr-btn {
    width: 100%;
    text-align: center;
  }
}

/* ---------- Featured Masterclass (updated) ---------- */
.mc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.mc-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  transition: all 0.4s ease;
  cursor: pointer;
  position: relative;
  height: 180px;
}

.mc-card:hover {
  transform: translateY(-6px);
  border-color: rgba(212,168,83,0.3);
  box-shadow: 0 15px 40px rgba(0,0,0,0.6), 0 0 20px rgba(212,168,83,0.15);
}

.mc-cover {
  width: 130px;
  flex-shrink: 0;
  background-size: cover;
  background-position: center;
  border-right: 1px solid rgba(255,255,255,0.05);
}

.mc-info {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  flex: 1;
}

.mc-badge {
  font-size: 0.65rem;
  color: var(--c-accent);
  border: 1px solid rgba(212,168,83,0.2);
  padding: 0.2rem 0.6rem;
  border-radius: 50px;
  align-self: flex-start;
  margin-bottom: 0.8rem;
  background: rgba(212,168,83,0.05);
}

.mc-title {
  font-family: var(--ff-serif);
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  color: var(--c-text-heading);
}

.mc-desc {
  font-size: 0.8rem;
  color: var(--c-text-dim);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}