:root{
  --bg: #0b0f14;
  --text: #e8eef7;
  --muted: #9fb0c6;
  --border: rgba(255,255,255,0.10);
  --shadow: 0 10px 30px rgba(0,0,0,0.45);
  --radius: 14px;
  --radiusSmall: 10px;
  --gap: 16px;
  --max: 1200px;

  /* HOMEPAGE TILE SIZE (200% bigger than original ~180px cap) */
  --tileMaxW: 360px;

  /* Detail page image area width */
  --coverMaxW: 340px;
}

/* Base */
*{ box-sizing: border-box; }
html, body { height: 100%; }
body{
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 800px at 20% 0%, #122131 0%, var(--bg) 55%) fixed;
}

/* Header */
.header{
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(11, 15, 20, 0.75);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner{
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Home header variant (centred title) */
.header-home{
  justify-content: center;
}

.brand{
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
}
.brand h1{
  font-size: 16px;
  margin: 0;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.brand .subtitle{
  font-size: 13px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.home-brand{
  width: 100%;
  text-align: center;
  display: grid;
  gap: 6px;
}
.home-brand h1{
  font-size: clamp(20px, 2.8vw, 34px);
  letter-spacing: 0.8px;
  text-transform: none;
}
.home-brand .subtitle{
  font-size: 14px;
  color: rgba(159,176,198,0.95);
}

.header-actions{
  margin-left: auto;
  display: flex;
  gap: 10px;
  align-items: center;
}

/* Layout */
.main{
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px 16px 28px;
}

/* Intro panel */
.intro-card{
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.03));
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 20px;
}
.intro-title{
  margin: 0 0 8px 0;
  font-size: 18px;
  letter-spacing: 0.2px;
}
.intro-text{
  margin: 0 0 10px 0;
  color: rgba(232,238,247,0.95);
  line-height: 1.55;
}
.intro-text:last-child{ margin-bottom: 0; }

/* Group sections */
.groups{
  display: grid;
  gap: 22px;
}
.group-section{
  display: grid;
  gap: 12px;
}
.group-header{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 0 4px;
}
.group-title{
  margin: 0;
  font-size: 16px;
  color: rgba(232,238,247,0.95);
  letter-spacing: 0.3px;
}

/* Grid */
.grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: var(--gap);
}

/* Large homepage grid */
.grid-large{
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

/* Tile */
.tile{
  display: grid;
  grid-template-rows: auto auto;
  gap: 10px;
  text-decoration: none;
  color: inherit;
  border-radius: var(--radius);
  padding: 10px;
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.03));
  border: 1px solid rgba(255,255,255,0.10);
  box-shadow: 0 1px 0 rgba(255,255,255,0.05) inset;
  transition: transform 120ms ease, border-color 120ms ease, background 120ms ease;
  max-width: var(--tileMaxW);
  justify-self: center;
  width: 100%;
}
.tile:hover{
  transform: translateY(-2px);
  border-color: rgba(255,255,255,0.18);
  background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.04));
}
.tile:focus{
  outline: 3px solid rgba(255,255,255,0.28);
  outline-offset: 2px;
}

/* Cover (grid tiles) */
.cover{
  width: 100%;
  aspect-ratio: 1 / 1.6;   /* Kindle-ish cover ratio */
  border-radius: var(--radiusSmall);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(255,255,255,0.10), rgba(255,255,255,0.02));
  border: 1px solid rgba(255,255,255,0.10);
  box-shadow: var(--shadow);
  position: relative;
}
.cover img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Fallback cover */
.cover-fallback{
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 14px;
  text-align: center;
  background: radial-gradient(300px 180px at 30% 20%, rgba(255,255,255,0.12), transparent 55%),
              linear-gradient(135deg, rgba(102,153,255,0.18), rgba(255,255,255,0.03));
}
.cover-fallback .fallback-title{
  font-weight: 700;
  font-size: 14px;
  line-height: 1.2;
}
.cover-fallback .fallback-author{
  margin-top: 8px;
  font-size: 12px;
  color: rgba(232,238,247,0.75);
}

/* Title under cover */
.tile-title{
  font-size: 13px;
  line-height: 1.25;
  margin: 0;
  color: rgba(232,238,247,0.92);
  text-align: center;

  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: calc(13px * 1.25 * 2);
}

/* Detail page layout */
.detail{
  display: grid;
  grid-template-columns: minmax(0, 380px) 1fr;
  gap: 22px;
  align-items: start;
}
@media (max-width: 860px){
  .detail{ grid-template-columns: 1fr; }
}

.detail-card{
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.03));
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius);
  padding: 16px;
}

/* Carousel (book page) */
.carousel{
  width: min(var(--coverMaxW), 100%);
  margin: 0 auto;
}
.carousel-frame{
  width: 100%;
  aspect-ratio: 1 / 1.6;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.10);
  box-shadow: var(--shadow);
  background: rgba(255,255,255,0.05);
  position: relative;
  cursor: zoom-in;
}
.carousel-frame img{
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  background: rgba(0,0,0,0.15);
}

/* Carousel controls */
.carousel-controls{
  margin-top: 10px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: center;
}
.pager{
  text-align: center;
  font-size: 13px;
  color: rgba(159,176,198,0.95);
  user-select: none;
}

/* Detail text */
.meta h2{
  margin: 0 0 6px 0;
  font-size: 26px;
  line-height: 1.15;
}
.meta .author{
  margin: 0 0 12px 0;
  color: var(--muted);
}
.meta .blurb{
  margin: 12px 0 0 0;
  line-height: 1.55;
  color: rgba(232,238,247,0.95);
}

/* Buttons */
.actions{
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.07);
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  font-size: 14px;
}
.btn:hover{ background: rgba(255,255,255,0.10); }
.btn:focus{ outline: 3px solid rgba(255,255,255,0.28); outline-offset: 2px; }
.btn[disabled]{
  opacity: 0.45;
  cursor: not-allowed;
}

/* Lightbox modal */
.lightbox{
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.72);
  display: none;
  z-index: 100;
  padding: 18px;
}
.lightbox[aria-hidden="false"]{ display: grid; place-items: center; }

.lightbox-inner{
  width: min(1200px, 100%);
  max-height: min(90vh, 900px);
  position: relative;
}
.lightbox-img{
  width: 100%;
  height: 100%;
  max-height: min(90vh, 900px);
  object-fit: contain;
  display: block;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(0,0,0,0.35);
}
.lightbox-close{
  position: absolute;
  top: -10px;
  right: -10px;
  border-radius: 999px;
  padding: 10px 12px;
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(20, 28, 38, 0.90);
  color: var(--text);
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(0,0,0,0.35);
}
.lightbox-close:focus{ outline: 3px solid rgba(255,255,255,0.28); outline-offset: 2px; }

.footer-note{
  margin-top: 12px;
  color: rgba(159,176,198,0.90);
  font-size: 12px;
  line-height: 1.4;
}

/* =========================
   Top-left menu (hamburger)
   ========================= */

.header-inner{
  position: relative; /* allows stable placement */
}

/* Make room for the menu button when present */
.header-inner.has-menu{
  padding-left: 56px;
}

/* Hamburger button */
.menu-btn{
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.07);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 0;
}
.menu-btn:hover{ background: rgba(255,255,255,0.10); }
.menu-btn:focus{ outline: 3px solid rgba(255,255,255,0.28); outline-offset: 2px; }

/* Icon lines */
.menu-icon{
  width: 18px;
  height: 14px;
  position: relative;
}
.menu-icon span{
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 2px;
  background: rgba(232,238,247,0.95);
}
.menu-icon span:nth-child(1){ top: 0; }
.menu-icon span:nth-child(2){ top: 6px; }
.menu-icon span:nth-child(3){ bottom: 0; }

/* Drawer overlay */
.drawer-overlay{
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  display: none;
  z-index: 200;
}
.drawer-overlay[aria-hidden="false"]{ display: block; }

/* Drawer panel */
.drawer{
  position: fixed;
  top: 0;
  left: 0;
  height: 100%;
  width: min(320px, 86vw);
  background: linear-gradient(180deg, rgba(15,22,32,0.98), rgba(12,18,26,0.98));
  border-right: 1px solid rgba(255,255,255,0.12);
  box-shadow: 18px 0 40px rgba(0,0,0,0.55);
  transform: translateX(-100%);
  transition: transform 160ms ease;
  z-index: 210;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.drawer[aria-hidden="false"]{
  transform: translateX(0);
}

.drawer-header{
  padding: 14px 14px 10px;
  border-bottom: 1px solid rgba(255,255,255,0.10);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.drawer-title{
  margin: 0;
  font-size: 14px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: rgba(232,238,247,0.92);
}

.drawer-close{
  width: 36px;
  height: 36px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.07);
  color: rgba(232,238,247,0.95);
  cursor: pointer;
}
.drawer-close:hover{ background: rgba(255,255,255,0.10); }
.drawer-close:focus{ outline: 3px solid rgba(255,255,255,0.28); outline-offset: 2px; }

.drawer-nav{
  padding: 10px 10px 14px;
  display: grid;
  gap: 8px;
}

.drawer-link{
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 12px;
  border-radius: 12px;
  text-decoration: none;
  color: rgba(232,238,247,0.95);
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.06);
}
.drawer-link:hover{
  background: rgba(255,255,255,0.10);
  border-color: rgba(255,255,255,0.16);
}
.drawer-link:focus{
  outline: 3px solid rgba(255,255,255,0.28);
  outline-offset: 2px;
}

.drawer-link .emoji{
  width: 22px;
  text-align: center;
  opacity: 0.95;
}

.drawer-footer{
  padding: 12px 14px;
  border-top: 1px solid rgba(255,255,255,0.10);
  color: rgba(159,176,198,0.90);
  font-size: 12px;
  line-height: 1.4;
}

/* =========================
   Global Footer
   ========================= */

.site-footer{
  margin-top: 40px;
  padding: 18px 16px;
  border-top: 1px solid rgba(255,255,255,0.10);
  background: rgba(11, 15, 20, 0.85);
}

.site-footer-inner{
  max-width: var(--max);
  margin: 0 auto;
  text-align: center;
  font-size: 13px;
  color: rgba(159,176,198,0.95);
  line-height: 1.6;
}

.site-footer a{
  color: rgba(232,238,247,0.95);
  text-decoration: none;
}
.site-footer a:hover{
  text-decoration: underline;
}