/* BiblioVerse Landing — minimalist + identity-aligned */
:root{
  --bg:#0e1117;
  --bg-soft:#12161f;
  --text:#e6edf3;
  --muted:#a9b3c1;
  --accent1:#4f7cff;
  --accent2:#7a5cff;
  --accent3:#b445ff;
  --border:#1a2130;
  --border-strong:#0a0d13;
  --shadow-hi: rgba(255,255,255,0.05);
  --shadow-lo: rgba(0,0,0,0.6);
}

:root[data-theme="light"]{
  --bg:#f6f8fb;
  --bg-soft:#ffffff;
  --text:#0b1220;
  --muted:#495266;
  --border:#dbe2ee;
  --border-strong:#cfd8e8;
  --shadow-hi: rgba(255,255,255,0.9);
  --shadow-lo: rgba(0,0,0,0.10);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font:14px/1.5 "TASA Explorer", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;}
.container{max-width:1100px;margin:0 auto;padding:22px}

/* Header */
.site-header{
  position: sticky; top:0; z-index:30; width:100%;
  background: color-mix(in oklab, var(--bg) 92%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border-strong);
}
.header-inner{ display:flex; flex-wrap:wrap; gap:12px; justify-content:space-between; align-items:center; padding-top:12px; padding-bottom:10px; }

.brand-wrap{ display:flex; flex-direction:column; gap:2px; }
.brand{ margin:0; font-size:31.6px; letter-spacing:.5px; line-height:1; display:inline-flex; align-items:center; gap:8px; }
.brand-gradient{
  background-image:
    linear-gradient(120deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.9) 45%, rgba(255,255,255,0) 60%),
    linear-gradient(90deg, var(--accent1), var(--accent2), var(--accent3));
  -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent;
  background-size: 22% 100%, 100% 100%;
  background-position: -40% 0, 0 0;
  background-repeat: no-repeat;
  animation: logoFocus .85s ease-out 0s both, logoShine 1.1s ease-in-out .9s both;
}
@keyframes logoFocus{ from{ filter:blur(2px); opacity:.6 } to{ filter:blur(0); opacity:1 } }
@keyframes logoShine{ to{ background-position: 140% 0, 0 0 } }

.beta-badge{ display:inline-flex; align-items:center; font-size:11px; font-weight:700; padding:2px 8px; border-radius:8px; background:linear-gradient(90deg,var(--accent1),var(--accent2),var(--accent3)); color:#fff; transform: translateY(4px); }

.byline{ font-size:12px; color:var(--muted); }
.bylink{ color:inherit; text-decoration:none; border-bottom:1px dashed var(--muted); opacity:.85 }
.bylink:hover{ opacity:1 }

.controls{display:flex;gap:10px;align-items:center}
.toggle{
  background:var(--bg-soft); color:var(--text); border:1px solid var(--border);
  height:38px; padding:0 12px; border-radius:14px; cursor:pointer;
  box-shadow:-3px -3px 6px var(--shadow-hi), 5px 5px 10px var(--shadow-lo);
}

/* Section titles */

/* Gradient titles and unified spacing */
.section-title{
  margin: 10px 0 6px 0;
  background: var(--brand-gradient, linear-gradient(90deg,#0A66C2,#5b8bd6));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
 margin-top: 10px; }

:root[data-theme="light"] .section-title{ color:#354f7a; opacity:.95 }

/* Hero logo before libraries */
.hero-logo{
  display:block;
  width: clamp(120px, 28vw, 125px);
  height: auto;
  aspect-ratio: 1 / 1;
  margin: 8px auto 18px;
  filter: drop-shadow(0 6px 14px rgba(0,0,0,.25));
}
:root[data-theme="light"] .hero-logo{ filter: drop-shadow(0 6px 14px rgba(0,0,0,.12)); }

/* Gral crumbs removed */

/* Library grid */
.lib-grid{
  display:grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap:12px;
}
@media (max-width:980px){
  .lib-grid{ grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width:640px){
  .lib-grid{ grid-template-columns: 1fr; }
}

.lib-card{
  display:grid; grid-template-columns: 28px 1fr auto; align-items:center; gap:10px;
  background: var(--bg-soft);
  border: 1px solid var(--border-strong);
  border-radius: 18px;
  padding: 12px;
  min-height: 64px;
  text-decoration:none; color: var(--text);
  box-shadow:-3px -3px 6px var(--shadow-hi), 5px 5px 10px var(--shadow-lo);
  transition: transform .08s ease, box-shadow .12s ease, background .2s ease;
}
.lib-card:hover{
  transform: translateY(-2px);
  background: linear-gradient(90deg,var(--accent1),var(--accent2));
  color:#fff;
  box-shadow:-4px -4px 8px var(--shadow-hi), 6px 6px 12px var(--shadow-lo);
}
.lib-card:active{ transform: translateY(0); }

.lib-name{ font-weight:700; letter-spacing:.2px }
.lib-visit{ font-weight:700 }

.favicon{
  width:24px; height:24px; border-radius:8px; display:grid; place-items:center;
  background: var(--bg);
  border:1px solid var(--border);
  box-shadow: inset -1px -1px 2px var(--shadow-hi), inset 1px 1px 2px var(--shadow-lo);
}
:root[data-theme="light"] .favicon{ background:#fff }

/* Invert section */
.section-invert{
  margin-top: 22px;
  padding: 18px;
  border: 1px solid var(--border-strong);
  border-radius: 18px;
  background: color-mix(in oklab, var(--bg) 60%, #000);
}
:root[data-theme="light"] .section-invert{ background: #ffffff; }

/* Curators */
.cur-head{ display:flex; gap:12px; align-items:center; justify-content:space-between; }
.curators{
  display:grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap:12px; margin-top:10px;
}
@media (max-width:980px){ .curators{ grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width:640px){ .curators{ grid-template-columns: 1fr; } }

.cur-card{
  display:grid; grid-template-columns: 72px 1fr; gap:12px;
  background: var(--bg-soft);
  border: 1px solid var(--border-strong);
  border-radius: 18px;
  padding: 12px;
  box-shadow:-3px -3px 6px var(--shadow-hi), 5px 5px 10px var(--shadow-lo);
}
.cur-photo{ width:72px; height:72px; border-radius:12px; object-fit:cover; border:1px solid var(--border); }
.cur-name{ margin:0 0 4px 0; font-size:16px; }
.cur-desc{ margin:0 0 8px 0; color:var(--muted); font-size:13px; }
.cur-links{ display:flex; gap:8px; flex-wrap:wrap }
.btn{
  display:inline-block; padding:6px 10px; border-radius:12px;
  border:none; background: #0f1520; color: var(--text);
  text-decoration:none; font-size:12px; margin:0;
  box-shadow: -2px -2px 4px var(--shadow-hi), 3px 3px 6px var(--shadow-lo);
  transition: transform .12s ease, box-shadow .12s ease, background .2s ease;
  font-family: "TASA Explorer", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  font-weight: 700;
  letter-spacing: .3px;
}
#shareBtn{ font-size:13px; }
:root[data-theme="light"] .btn{ background:#e7eaf3; color:#182033 }
.btn:hover{ transform: translateY(-1px) scale(1.02); background: linear-gradient(90deg,var(--accent1),var(--accent2)); color:#fff }

/* Footer (reuse identity) */
.footer{
  margin:28px 0 10px; opacity:.95; font-size:13px; text-align:center;
  border-top:1px solid var(--border-strong); padding-top:16px;
}
.footer-inner{ display:flex; flex-direction:column; gap:10px; align-items:center }
.footer-actions{ display:flex; gap:8px; flex-wrap:wrap; justify-content:center }
.footer-count{ opacity:.8; font-size:12px; border-bottom:1px solid var(--border-strong); padding-bottom:10px; margin-bottom:10px; width:100%; text-align:center }

/* Back to top */
#toTopBtn{
  position: fixed; right: 16px; bottom: 16px; width: 44px; height: 44px;
  border-radius: 14px; border: 1px solid var(--border); background: var(--bg-soft); color: var(--text);
  display: grid; place-items: center;
  box-shadow:-4px -4px 8px var(--shadow-hi), 6px 6px 12px var(--shadow-lo);
  cursor: pointer; opacity: 0; pointer-events: none; transform: translateY(8px);
  transition: opacity .18s ease, transform .18s ease, box-shadow .18s ease, background .18s ease;
  z-index: 50;
}
#toTopBtn.show{ opacity:.95; pointer-events:auto; transform: translateY(0); }
#toTopBtn:hover{ background: linear-gradient(90deg,var(--accent1),var(--accent2),var(--accent3)); color:#fff }

/* A11y */
.sr-only{ position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }

/* Header centering & controls absolute */
.header-inner{ position:relative; justify-content:center; }
.brand-wrap{ align-items:center; text-align:center; }
.controls{ position:absolute; right:22px; top:50%; transform:translateY(-50%); }
.brand{ justify-content:center; }

#langToggle{
  background:var(--bg-soft);
  color:var(--text);
  border:1px solid var(--border);
  height:38px;
  padding:0 12px;
  border-radius:14px;
  cursor:pointer;
  box-shadow:-3px -3px 6px var(--shadow-hi), 5px 5px 10px var(--shadow-lo);
}

/* i18n toggle spacing */
.controls .toggle#langToggle{ margin-right:8px; }


/* Identity-aligned select (libraries filter) */
#libFilter{
  font-family: var(--font-family, inherit);
  font-size: 1rem;

  font-family: var(--font);
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background: var(--bg-soft);
  color: var(--text);
  border:1px solid var(--border);
  height:38px;
  padding:0 34px 0 12px; /* room for caret */
  border-radius:14px;
  cursor:pointer;
  box-shadow:-3px -3px 6px var(--shadow-hi), 5px 5px 10px var(--shadow-lo);
  font-weight:700;
  letter-spacing:.2px;
  position: relative;

  font-family: var(--font, inherit) !important;
  font-size: 0.95rem;
  line-height: 1;
}


#libFilter:hover{
  background: linear-gradient(90deg,var(--accent1),var(--accent2));
  color:#fff;
}

#libFilter:active{ transform: translateY(0); }

/* simple caret */
.cur-head{ position:relative; }
.cur-head::after{
  content: '▾';
  position:absolute;
  right:10px;
  top:50%;
  transform: translateY(-50%);
  pointer-events:none;
  font-size:12px;
  opacity:.8;
}


/* About block with same shadow as cards */
.about-card{
  background: var(--bg-soft);
  border: 1px solid var(--border-strong);
  border-radius: 18px;
  padding: 12px;
  box-shadow:-3px -3px 6px var(--shadow-hi), 5px 5px 10px var(--shadow-lo);
}

.lang-icon{
  font-family: var(--font);
  font-size: 1.2rem;
  line-height:1;
}


main > section{
  margin-top: 80px;
}
main > section:first-child{
  margin-top: 40px;
}


/* Filter select adopts theme typography */
#libFilter{
  font-family: var(--font-family, inherit);
  font-size: 1rem;

  font-family: var(--font, inherit);
  font-size: var(--font-size, 14px);
  line-height: 1.15;
}


/* Section spacing and title breathing room */
section + section{ margin-top: 10px; }
section h2, .section-title{
  margin-bottom: clamp(12px, 2.2vw, 22px);
}
/* If there is a .block-group wrapper of the 3 main areas, add gap */
.block-group{
  display: grid;
  gap: clamp(20px, 3.5vw, 36px);
}


/* Extra spacing between main blocks */
main > section {
  margin-top: 80px;
}
main > section:first-of-type {
  margin-top: 0;
}

main h2.section-title{margin-bottom:20px;}

/* Header responsive layout: place toggles under title on small screens */
.site-header .header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between; text-align:left;
  gap: 12px;
}

.site-header .brand-wrap{ display:flex; flex-direction:column; gap:6px; align-items:flex-start; }

.site-header .controls{ display:flex; gap:8px; }

@media (max-width: 720px){
  .site-header .header-inner{ flex-direction: column; align-items: flex-start; }
  .site-header .controls{ order: 2; }
  .site-header .brand-wrap{ order: 1; }
}

/* Ensure curator filter remains clickable */
#libFilter{ position: relative; z-index: 1; }

/* Compact spacing for main blocks */
.main-block + .main-block{ margin-top: 8px; }


/* Tighter spacing before About and Curators */
section[data-i18n-attr*="section.about.aria"]{ margin-top: 6px; }
#curators{ margin-top: 6px; }


/* Extra 10px above About and Curators titles */
section[data-i18n-attr*="section.about.aria"] .section-title{ margin-top: 10px; }
#curators .section-title{ margin-top: 10px; }


/* Gradient effect for main section titles */
.section-title.gradient-title{
  background-image: linear-gradient(90deg, var(--accent1), var(--accent2), var(--accent3));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  display: inline-block;
}

section[data-i18n-attr*="section.about.aria"] > .section-title{ margin-top: 10px; }

#curators > .section-title{ margin-top: 10px; }


/* Prevent header controls from overlapping the title on small screens */
@media (max-width: 720px){
  .site-header .header-inner{ display:flex; flex-wrap: wrap; flex-direction: row; }
  .site-header .brand-wrap{ flex: 1 1 100%; }
  .site-header .controls{ flex: 1 1 100%; display:flex; gap:8px; margin-top: 6px; }
}


/* Equal top spacing for About and Curators subtitles */
.section-title[data-i18n="section.about.title"],
.section-title[data-i18n="section.curators.title"]{
  margin-top: 10px;
}
/* Tighten section gaps overall a bit */
section + section{ margin-top: 6px; }


/* Header stacking on small screens: Title then Buttons */
@media (max-width: 720px){
  .site-header .header-inner{ 
    flex-direction: column; 
    align-items: flex-start; 
  }
  .site-header .brand-wrap{ order: 1; width: 100%; }
  .site-header .controls{ order: 2; margin-top: 6px; display:flex; gap:8px; flex-wrap: wrap; }
}


/* Ensure curator social links use the same identity gradient on hover */
.cur-links .btn:hover{
  background: linear-gradient(90deg,var(--accent1),var(--accent2),var(--accent3));
  color:#fff;
}


/* Added spacer before sections */
section { margin-top: 10px; }

/* Gradient style for share button */
.btn-share {
  background: linear-gradient(45deg, #0A66C2, #5b8bd6);
  color: #fff;
  border: none;
  padding: 0.5em 1em;
  border-radius: 6px;
  cursor: pointer;
}
.btn-share:hover {
  opacity: 0.9;
}


/* Share button gradient (matches site style, without altering other buttons) */
#shareBtn,
[data-action="share"],
.btn-share-gradient {
  background-image: linear-gradient(135deg, var(--grad-start, #0A66C2), var(--grad-end, #5b8bd6));
  color: #fff !important;
  border: none;
  outline: none;
  transition: transform 0.08s ease, filter 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 4px 14px rgba(10,102,194,0.25);
}
#shareBtn:hover,
[data-action="share"]:hover,
.btn-share-gradient:hover {
  filter: brightness(1.05);
}
#shareBtn:active,
[data-action="share"]:active,
.btn-share-gradient:active {
  transform: scale(0.985);
}