/* ==========================================================================
   Chhaygaon College Library — stylesheet
   No external framework. Vanilla CSS only.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700&family=DM+Sans:wght@400;500;700&family=IBM+Plex+Mono:wght@500&display=swap');

:root{
  /* -- palette: reading room --------------------------------------------- */
  --ink:        #20291f;   /* deep shelf green-black — headings          */
  --ink-soft:   #473f33;   /* body copy                                   */
  --shelf:      #3b2c1f;   /* aged wood — header / footer                 */
  --shelf-deep: #2a2016;
  --parchment:  #f5eddb;   /* aged paper — page background                */
  --parchment-2:#ecdfbd;   /* deeper panel background                     */
  --cream:      #fbf7ee;   /* card surfaces                               */
  --brass:      #b3893f;   /* accent — call-number tags, rules, buttons   */
  --brass-deep: #8a6a30;
  --line:       #d9c69c;
  --shadow:     0 18px 40px -18px rgba(32,41,31,.35);

  --font-display: "Fraunces", "Noto Serif", serif;
  --font-body: "DM Sans", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *, *::before, *::after{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; }
}
body{
  margin:0;
  background:var(--parchment);
  color:var(--ink-soft);
  font-family:var(--font-body);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ list-style:none; margin:0; padding:0; }
.container{ max-width:1180px; margin:0 auto; padding:0 24px; }

/* -- call-number eyebrow: our signature element -------------------------- *
   Every section is introduced the way a book is found on a shelf: a small
   brass classification tag, exactly like a Dewey call-number label glued
   to a spine, followed by the section's real heading.                     */
.call-number{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--brass-deep);
  border:1px solid var(--brass);
  background:var(--cream);
  padding:3px 10px;
  border-radius:2px;
  margin-bottom:14px;
}
/*.call-number::before{ content:"\00A7"; opacity:.7; }*/

.section-title{
  font-family:var(--font-display);
  font-optical-sizing:auto;
  font-weight:600;
  color:var(--ink);
  font-size:clamp(22px,3vw,34px);
  margin:0 0 18px;
}

/* ==========================================================================
   HEADER
   ========================================================================== */
header{ position:relative; z-index:100; font-family:var(--font-body); }

.top-bar{
  background:var(--shelf-deep);
  color:#e9dfc9;
  font-size:13px;
}
.content-topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:38px;
}
.top-bar .tagline{ opacity:.8; letter-spacing:.02em; }
.right-top-bar{ display:flex; gap:22px; align-items:center; }
.right-top-bar a{ opacity:.9; transition:opacity .2s, color .2s; }
.right-top-bar a:hover{ opacity:1; color:var(--brass); }

.wrap-menu-desktop{ background:var(--shelf); }
.limiter-menu-desktop{
  max-width:1180px;
  margin:0 auto;
  padding:0 24px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:84px;
}
.logo h4{
  margin:0;
  font-family:var(--font-display);
  font-weight:600;
  font-size:22px;
  letter-spacing:.03em;
  color:var(--cream);
}
.logo .logo-sub{
  display:block;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.14em;
  color:var(--brass);
  margin-top:3px;
}

.main-menu{ display:flex; align-items:center; gap:2px; }
.main-menu > li{ position:relative; }
.main-menu > li > a{
  display:block;
  padding:14px 16px;
  color:#e9dfc9;
  font-size:14.5px;
  font-weight:500;
  letter-spacing:.01em;
  border-radius:3px;
  transition:background .2s, color .2s;
}
.main-menu > li:hover > a,
.main-menu > li.active-menu > a{
  background:rgba(179,137,63,.16);
  color:var(--brass);
}
.main-menu .sub-menu{
  position:absolute;
  top:100%;
  left:0;
  min-width:210px;
  background:var(--cream);
  border:1px solid var(--line);
  border-top:3px solid var(--brass);
  box-shadow:var(--shadow);
  padding:8px;
  opacity:0;
  visibility:hidden;
  transform:translateY(6px);
  transition:opacity .18s, transform .18s, visibility .18s;
}
.main-menu > li:hover .sub-menu{ opacity:1; visibility:visible; transform:translateY(0); }
.main-menu .sub-menu li a{
  display:block;
  padding:9px 12px;
  font-size:14px;
  color:var(--ink-soft);
  border-radius:2px;
}
.main-menu .sub-menu li a:hover{ background:var(--parchment-2); color:var(--brass-deep); }

/* mobile header ------------------------------------------------------------ */
.wrap-header-mobile{
  display:none;
  align-items:center;
  justify-content:space-between;
  background:var(--shelf);
  padding:14px 20px;
  position:sticky;
  top:0;
  z-index:200;
}
.logo-mobile h5{ margin:0; font-family:var(--font-display); color:var(--cream); font-weight:600; }
.btn-show-menu-mobile{
  width:44px; height:44px; position:relative; cursor:pointer;
  display:flex; align-items:center; justify-content:center;
}
.btn-show-menu-mobile span{
  position:absolute; left:11px; width:22px; height:2px; background:var(--brass);
  transition:transform .25s, opacity .25s;
}
.btn-show-menu-mobile span:nth-child(1){ top:15px; }
.btn-show-menu-mobile span:nth-child(2){ top:22px; }
.btn-show-menu-mobile span:nth-child(3){ top:29px; }
.btn-show-menu-mobile.is-active span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
.btn-show-menu-mobile.is-active span:nth-child(2){ opacity:0; }
.btn-show-menu-mobile.is-active span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

.menu-mobile{
  display:none;
  background:var(--shelf-deep);
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease;
}
.menu-mobile.is-open{ max-height:1200px; }
.main-menu-m > li{ border-top:1px solid rgba(233,223,201,.12); }
.main-menu-m > li > a{
  display:block; padding:14px 20px; color:#e9dfc9; font-size:15px; min-height:44px;
}
.main-menu-m > li{ position:relative; }
.arrow-main-menu-m{
  position:absolute; right:18px; top:12px; color:var(--brass);
  transition:transform .2s;
}
.main-menu-m > li.is-open .arrow-main-menu-m{ transform:rotate(90deg); }
.sub-menu-m{ display:none; background:rgba(0,0,0,.15); }
.main-menu-m > li.is-open .sub-menu-m{ display:block; }
.sub-menu-m li a{ display:block; padding:11px 34px; font-size:14px; color:#d8c9a3; min-height:44px; }

@media (max-width: 991px){
  .container-menu-desktop{ display:none; }
  .wrap-header-mobile{ display:flex; }
  .menu-mobile{ display:block; }
}

/* ==========================================================================
   HERO SLIDER
   ========================================================================== */
.hero-slider{
  position:relative;
  height:min(78vh, 620px);
  min-height:420px;
  overflow:hidden;
  background:var(--shelf-deep);
}
.hero-slide{
  position:absolute; inset:0;
  background-size:cover; background-position:center;
  opacity:0; transition:opacity 1.1s ease;
}
.hero-slide.is-active{ opacity:1; }
.hero-slide::after{
  content:"";
  position:absolute; inset:0;
  background:
    linear-gradient(0deg, rgba(23,20,12,.78) 0%, rgba(23,20,12,.42) 45%, rgba(23,20,12,.15) 100%);
}
/* faint vertical "book spine" rhythm across the hero, tying the whole
   page back to a shelf of books without being a literal illustration */
.hero-slider::before{
  content:"";
  position:absolute; inset:0;
  /*background-image:repeating-linear-gradient(90deg, rgba(245,237,219,.05) 0 2px, transparent 2px 42px);*/
  pointer-events:none;
  z-index:2;
}
.hero-content{
  position:relative; z-index:3;
  height:100%;
  display:flex; flex-direction:column; justify-content:flex-end;
  padding:0 24px 64px;
  max-width:1180px; margin:0 auto;
}
.hero-eyebrow{
  font-family:var(--font-mono);
  color:var(--brass);
  letter-spacing:.16em;
  font-size:12.5px;
  text-transform:uppercase;
  margin-bottom:14px;
}
.hero-title{
  font-family:var(--font-display);
  font-optical-sizing:auto;
  color:var(--cream);
  font-weight:600;
  font-size:clamp(28px,4.6vw,54px);
  max-width:820px;
  margin:0;
}
.hero-dots{
  position:absolute; z-index:3; bottom:22px; right:24px;
  display:flex; gap:8px;
}
.hero-dots button{
  width:9px; height:9px; border-radius:50%;
  border:1px solid var(--brass);
  background:transparent;
  padding:0; cursor:pointer;
  opacity:.6;
  transition:opacity .2s, background .2s;
}
.hero-dots button.is-active{ background:var(--brass); opacity:1; }

@media (max-width: 600px){
  .hero-slider{ height:min(60vh, 460px); min-height:340px; }
  .hero-content{ padding:0 18px 40px; }
  .hero-dots{ right:18px; bottom:16px; }
}

/* ==========================================================================
   ABOUT + NOTICE BOARD
   ========================================================================== */
.about-notice{
  display:grid;
  grid-template-columns:1.35fr 1fr;
  gap:0;
  background:var(--cream);
}
.about-panel{ padding:64px 48px 64px 0; }
.about-panel .container-inner{ max-width:620px; margin-left:auto; }
.about-copy{ text-align:justify; color:var(--ink-soft); }
.load-more{
  display:inline-flex; align-items:center; gap:8px;
  margin-top:28px;
  font-family:var(--font-mono);
  font-size:12.5px; letter-spacing:.06em; text-transform:uppercase;
  color:var(--ink);
  border-bottom:1px solid var(--brass);
  padding-bottom:3px;
  transition:color .2s, border-color .2s;
}
.load-more:hover{ color:var(--brass-deep); border-color:var(--brass-deep); }

/* the "card catalog" drawer -------------------------------------------- */
.catalog-drawer{
  background:var(--shelf);
  padding:56px 44px;
  position:relative;
}
.catalog-drawer::before{
  content:"NOTICE BOARD";
  position:absolute; top:22px; right:44px;
  font-family:var(--font-mono);
  font-size:11px; letter-spacing:.18em;
  color:rgba(233,223,201,.4);
}
.catalog-drawer .section-title{ color:var(--cream); }
.catalog-drawer .call-number{ background:transparent; color:var(--brass); border-color:var(--brass); }

.notice-viewport{
  height:340px;
  overflow:hidden;
  position:relative;
  mask-image:linear-gradient(180deg, transparent 0, #000 24px, #000 calc(100% - 24px), transparent 100%);
}
.notice-track{
  animation:notice-scroll 26s linear infinite;
}
.notice-viewport:hover .notice-track{ animation-play-state:paused; }
@keyframes notice-scroll{
  0%{ transform:translateY(0); }
  100%{ transform:translateY(-50%); }
}
.notice-item{
  display:flex; gap:16px;
  padding:14px 0;
  border-bottom:1px dashed rgba(233,223,201,.18);
}
.notice-date{
  flex:0 0 58px;
  border-left:3px solid var(--brass);
  padding-left:10px;
}
.notice-date .day{ display:block; font-family:var(--font-mono); font-size:12px; color:#d8c9a3; }
.notice-date .year{ display:block; font-family:var(--font-display); font-size:22px; font-weight:700; color:var(--cream); }
.notice-body a{
  color:#efe6ce; font-size:14.5px; line-height:1.5;
  transition:color .2s;
}
.notice-body a:hover{ color:var(--brass); }
.notice-new{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:10px; letter-spacing:.08em;
  color:var(--shelf-deep);
  background:var(--brass);
  padding:1px 6px; border-radius:2px;
  margin-right:8px;
  vertical-align:middle;
}
.notice-cta{ margin-top:24px; display:block; }
.notice-cta a{
  font-family:var(--font-mono); font-size:12.5px; letter-spacing:.06em; text-transform:uppercase;
  color:var(--brass); border-bottom:1px solid var(--brass); padding-bottom:3px;
}

@media (max-width: 900px){
  .about-notice{ grid-template-columns:1fr; }
  .about-panel{ padding:48px 24px; }
  .about-panel .container-inner{ margin:0; padding-left:0; }
  .catalog-drawer{ padding:48px 24px; }
}
@media (max-width: 600px){
  .about-panel{ padding:40px 18px; }
  .catalog-drawer{ padding:40px 18px; }
  .catalog-drawer::before{ right:18px; top:18px; }
  .notice-viewport{ height:300px; }
}

/* ==========================================================================
   COLLECTION GRID
   ========================================================================== */
.collection{ padding:72px 0; background:var(--parchment); }
.collection-grid{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:26px;
}
.book-card{
  background:var(--cream);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  overflow:hidden;
  transition:transform .25s ease, box-shadow .25s ease;
}
.book-card:hover{ transform:translateY(-6px); }
.book-cover{
  position:relative;
  aspect-ratio:3/4;
  overflow:hidden;
  background:var(--parchment-2);
}
.book-cover img{ width:100%; height:100%; object-fit:cover; transition:transform .4s ease; }
.book-card:hover .book-cover img{ transform:scale(1.06); }
.book-quick{
  position:absolute; inset:auto 0 0 0;
  padding:10px;
  text-align:center;
  font-family:var(--font-mono);
  font-size:11.5px; letter-spacing:.06em; text-transform:uppercase;
  color:var(--cream);
  background:rgba(32,41,31,.82);
  transform:translateY(100%);
  transition:transform .25s ease;
}
.book-card:hover .book-quick,
.book-card:focus-within .book-quick{ transform:translateY(0); }
.book-title{
  display:block;
  padding:16px 16px 18px;
  font-size:14.5px;
  font-weight:500;
  color:var(--ink);
}

@media (max-width: 900px){ .collection-grid{ grid-template-columns:repeat(2, 1fr); } }
@media (max-width: 480px){
  .collection{ padding:52px 0; }
  .collection-grid{ grid-template-columns:1fr 1fr; gap:16px; }
}

/* ==========================================================================
   QUICK-VIEW DIALOG (native <dialog>, no lightbox library)
   ========================================================================== */
dialog.quick-view{
  border:none; padding:0; max-width:min(90vw,780px); width:100%;
  background:var(--cream);
  box-shadow:var(--shadow);
}
dialog.quick-view::backdrop{ background:rgba(20,17,10,.72); }
dialog.quick-view img{ width:100%; display:block; }
dialog.quick-view .qv-close{
  position:absolute; top:10px; right:14px;
  font-family:var(--font-mono); font-size:20px; color:var(--cream);
  background:var(--shelf); border:none; width:38px; height:38px; cursor:pointer;
}

/* ==========================================================================
   QUICK LINKS + ACTIVITIES
   ========================================================================== */
.desk-activities{ background:var(--parchment-2); padding:72px 0; }
.desk-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:start;
}
.quick-links{ display:grid; grid-template-columns:1fr 1fr; gap:18px; }
.quick-link-card{
  background:var(--cream);
  border:1px solid var(--line);
  padding:26px 18px;
  text-align:center;
  transition:transform .2s ease, border-color .2s ease;
}
.quick-link-card:hover{ transform:translateY(-4px); border-color:var(--brass); }
.quick-link-card img{ width:44px; height:44px; margin:0 auto 12px; object-fit:contain; }
.quick-link-card p{ margin:0; font-size:14px; color:var(--ink); font-weight:500; }

.activities-rail{ position:relative; }
.rail-track{
  display:flex; gap:18px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding-bottom:6px;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.rail-track::-webkit-scrollbar{ display:none; }
.activity-card{
  flex:0 0 260px;
  scroll-snap-align:start;
  background:var(--cream);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  overflow:hidden;
}
.activity-card img{ width:100%; aspect-ratio:16/10; object-fit:cover; }
.activity-body{ padding:14px 16px 18px; }
.activity-body p{ margin:0 0 8px; font-size:14px; color:var(--ink-soft); }
.activity-date{
  font-family:var(--font-mono); font-size:11.5px; color:var(--brass-deep);
  display:flex; align-items:center; gap:6px;
}
.rail-nav{
  display:flex; gap:10px; margin-top:16px;
}
.rail-nav button{
  width:44px; height:44px;
  border:1px solid var(--brass);
  background:var(--cream);
  color:var(--brass-deep);
  cursor:pointer;
  font-family:var(--font-mono);
  transition:background .2s, color .2s;
}
.rail-nav button:hover{ background:var(--brass); color:var(--cream); }

@media (max-width: 900px){
  .desk-grid{ grid-template-columns:1fr; gap:44px; }
}
@media (max-width: 420px){
  .quick-links{ grid-template-columns:1fr 1fr; gap:12px; }
  .quick-link-card{ padding:20px 12px; }
  .activity-card{ flex-basis:220px; }
}

/* ==========================================================================
   E-RESOURCES STRIP
   ========================================================================== */
.resources-strip{ padding:56px 0 72px; background:var(--parchment); }
.strip-track{
  display:flex; gap:14px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.strip-track::-webkit-scrollbar{ display:none; }
.strip-item{
  flex:0 0 160px;
  scroll-snap-align:start;
  background:var(--cream);
  border:1px solid var(--line);
  display:flex; align-items:center; justify-content:center;
  height:96px;
  padding:14px;
  filter:grayscale(1) contrast(1.05);
  opacity:.75;
  transition:filter .2s, opacity .2s;
}
.strip-item:hover{ filter:none; opacity:1; }
.strip-item img{ max-height:56px; width:auto; object-fit:contain; }

@media (max-width: 600px){
  .resources-strip{ padding:44px 0 56px; }
  .strip-item{ flex-basis:130px; height:82px; }
  .strip-item img{ max-height:44px; }
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer{
  background:var(--shelf);
  color:#d8c9a3;
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.1fr 1fr 1fr;
  gap:40px;
  padding-bottom:40px;
  border-bottom:1px solid rgba(233,223,201,.14);
}
.footer-title{
  font-family:var(--font-display);
  font-weight:600;
  color:var(--cream);
  font-size:18px;
  margin:0 0 18px;
}
.footer-copy{ margin:0 0 10px; font-size:14px; line-height:1.7; color:#d8c9a3; }
.footer-note{ opacity:.75; font-size:13px; }
.footer-links li{ margin-bottom:10px; }
.footer-links a{
  font-size:14px;
  color:#d8c9a3;
  transition:color .2s;
}
.footer-links a:hover{ color:var(--brass); }
.footer-map{
  overflow:hidden;
  border:1px solid rgba(233,223,201,.18);
  line-height:0;
}
.footer-bottom{
  padding:22px 24px;
  text-align:center;
}
.footer-bottom p{
  margin:0;
  font-size:12.5px;
  letter-spacing:.02em;
  color:rgba(216,201,163,.75);
}
.footer-bottom a{ color:var(--brass); }
.footer-bottom a:hover{ color:var(--cream); }

@media (max-width: 900px){
  .footer-grid{ grid-template-columns:1fr 1fr; }
}
@media (max-width: 600px){
  .site-footer{ padding:48px 0 0; }
  .footer-grid{ grid-template-columns:1fr; gap:32px; padding:0 18px 32px; }
  .container.footer-grid{ padding-left:18px; padding-right:18px; }
}

/* -- back to top --------------------------------------------------------- */
.btn-back-to-top{
  position:fixed;
  right:22px; bottom:22px;
  width:46px; height:46px;
  border:none; border-radius:50%;
  background:var(--brass);
  color:var(--shelf-deep);
  font-size:18px;
  display:flex; align-items:center; justify-content:center;
  cursor:pointer;
  box-shadow:var(--shadow);
  opacity:0; visibility:hidden;
  transform:translateY(10px);
  transition:opacity .2s, transform .2s, visibility .2s, background .2s;
  z-index:300;
}
.btn-back-to-top.is-visible{ opacity:1; visibility:visible; transform:translateY(0); }
.btn-back-to-top:hover{ background:var(--brass-deep); }

@media (max-width: 600px){
  .btn-back-to-top{ right:16px; bottom:16px; width:42px; height:42px; }
}