/* ==========================================================================
   UECF.NET Web Book — shared stylesheet (Telugu book-profile variant)
   Mobile-first. No frameworks. Light + dark themes.
   ========================================================================== */

:root{
  --ink:#101B31;
  --ink-soft:#2C3E60;
  --gold:#C79A3D;
  --gold-soft:#E4C685;
  --maroon:#8B3A42;
  --teal:#2F5D62;
  --cream:#FAF6EC;
  --cream-dim:#F0E7D5;
  --line:#E2D8C0;
  --card:#FFFFFF;
  --band:#101B31;      /* header / hero / footer: stays dark in both themes */
  --band-fg:#FFFFFF;
  --shadow:0 1px 2px rgba(16,27,49,.06),0 8px 24px rgba(16,27,49,.06);
  --font-display:'Fraunces',Georgia,serif;
  --font-body:'Source Sans 3',system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-te:'Noto Sans Telugu','Gautami','Nirmala UI',sans-serif;
  --max:1200px;
  --reading:min(72ch,100%);
  --radius:14px;
  --pad:clamp(16px,4vw,32px);
  --reader-scale:1;
}

/* Dark theme: follows the OS unless the reader picks a side. */
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --ink:#EAF0FA; --ink-soft:#B9C6DC; --cream:#0E1524; --cream-dim:#151E31;
    --card:#141D2E; --line:#26334B; --gold:#D8B05F; --gold-soft:#8C712F;
    --maroon:#D2848C; --teal:#7FB3B8; --band:#080E1A; --band-fg:#EAF0FA;
    --shadow:0 1px 2px rgba(0,0,0,.5),0 10px 28px rgba(0,0,0,.4);
  }
}
:root[data-theme="dark"]{
  --ink:#EAF0FA; --ink-soft:#B9C6DC; --cream:#0E1524; --cream-dim:#151E31;
  --card:#141D2E; --line:#26334B; --gold:#D8B05F; --gold-soft:#8C712F;
  --maroon:#D2848C; --teal:#7FB3B8; --band:#080E1A; --band-fg:#EAF0FA;
  --shadow:0 1px 2px rgba(0,0,0,.5),0 10px 28px rgba(0,0,0,.4);
}

*{box-sizing:border-box;}
[hidden]{display:none!important;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;}
}
body{
  margin:0;font-family:var(--font-body);color:var(--ink);background:var(--cream);
  line-height:1.65;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--maroon);text-underline-offset:.18em;}
a:hover{color:var(--ink);}
:focus-visible{outline:3px solid var(--gold);outline-offset:2px;border-radius:4px;}

.container{width:min(var(--max),100% - 2*var(--pad));margin-inline:auto;}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--gold);color:#111;
  padding:10px 16px;z-index:100;border-radius:0 0 8px 0;}
.skip-link:focus{left:0;}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}

/* ---------- Telugu text ---------- */
.te{font-family:var(--font-te);line-height:1.9;}
h1.te,h2.te,h3.te,h4.te{font-family:var(--font-te);}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:var(--band);color:var(--band-fg);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.header-inner{display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  width:min(var(--max),100% - 2*var(--pad));margin-inline:auto;padding:10px 0;}
.brand{display:flex;align-items:center;gap:12px;color:var(--band-fg);text-decoration:none;margin-right:auto;}
.brand-logo-img{border-radius:8px;background:#fff;padding:2px;}
.brand-text .full{display:block;font-family:var(--font-display);font-weight:600;font-size:1rem;line-height:1.2;}
.brand-text .sub{display:block;font-size:.76rem;color:var(--gold-soft);}
.nav-toggle{display:none;background:transparent;color:var(--band-fg);border:1px solid rgba(255,255,255,.35);
  border-radius:8px;padding:8px 12px;font:inherit;cursor:pointer;}
.primary-nav ul{display:flex;gap:18px;list-style:none;margin:0;padding:0;flex-wrap:wrap;}
.primary-nav a{color:var(--band-fg);text-decoration:none;font-size:.94rem;padding:6px 2px;border-bottom:2px solid transparent;}
.primary-nav a:hover,.primary-nav a[aria-current="page"]{border-bottom-color:var(--gold);color:var(--band-fg);}
.theme-btn{background:transparent;border:1px solid rgba(255,255,255,.35);border-radius:8px;
  color:var(--band-fg);font:inherit;font-size:.94rem;line-height:1;padding:6px 10px;cursor:pointer;}
.theme-btn:hover{border-color:var(--gold);}
@media (max-width:860px){
  .nav-toggle{display:block;}
  .primary-nav{flex-basis:100%;display:none;}
  .primary-nav.open{display:block;}
  .primary-nav ul{flex-direction:column;gap:2px;padding-bottom:8px;}
}

/* reading progress bar sits under the sticky header */
.progress-track{position:sticky;top:0;z-index:59;height:4px;background:transparent;}
.progress-bar{height:4px;width:0;background:linear-gradient(90deg,var(--gold),var(--maroon));transition:width .1s linear;}

/* ---------- hero / breadcrumb ---------- */
.page-hero{background:var(--band);color:var(--band-fg);padding:26px 0 34px;}
.page-hero h1{font-family:var(--font-display);font-size:clamp(1.5rem,4vw,2.4rem);margin:.25em 0 .2em;line-height:1.15;}
.eyebrow{display:inline-block;font-size:.74rem;letter-spacing:.06em;text-transform:none;color:var(--gold-soft);}
.breadcrumb{font-size:.85rem;color:var(--gold-soft);margin-bottom:6px;}
.breadcrumb a{color:var(--gold-soft);}
.breadcrumb a:hover{color:var(--band-fg);}
.kolam-rule{height:8px;background:repeating-linear-gradient(90deg,var(--gold) 0 14px,transparent 14px 28px);opacity:.55;}
.lang-switch{display:inline-block;margin-top:10px;font-size:.85rem;}
.lang-switch a{color:var(--gold-soft);text-decoration:underline;}
.lang-switch a:hover{color:var(--band-fg);}

/* ---------- layout ---------- */
.content-wrap{padding:clamp(20px,4vw,44px) 0 60px;}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:clamp(16px,3vw,28px);}

/* ---------- landing / book profile ---------- */
.book-hero{display:grid;gap:26px;grid-template-columns:1fr;}
@media (min-width:760px){.book-hero{grid-template-columns:260px 1fr;}}
.cover{border-radius:12px;border:1px solid var(--line);box-shadow:var(--shadow);}
.stats{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0;padding:0;list-style:none;}
.stats li{background:var(--cream-dim);border:1px solid var(--line);border-radius:999px;
  padding:6px 14px;font-size:.85rem;}
.stats b{color:var(--maroon);}
.btn{display:inline-block;background:var(--gold);color:#1b1305;font-weight:700;
  padding:13px 26px;border-radius:999px;text-decoration:none;border:1px solid var(--gold);}
.btn:hover{background:var(--ink);color:#fff;border-color:var(--ink);}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line);}
.grid-cards{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));}
.grid-cards a{display:block;padding:16px;border:1px solid var(--line);border-radius:var(--radius);
  background:var(--card);text-decoration:none;color:var(--ink);box-shadow:var(--shadow);}
.grid-cards a:hover{border-color:var(--gold);}
.grid-cards .te{font-size:1.02rem;}

/* ---------- static table of contents (book-profile page) ---------- */
.contents-list h3{font-family:var(--font-display);color:var(--maroon);font-size:1.1rem;margin:1.4em 0 .3em;}
.contents-list h3.te{font-family:var(--font-te);}
.contents-list h3:first-child{margin-top:0;}
.contents-list h4{font-family:var(--font-te);font-weight:700;font-size:.92rem;color:var(--ink-soft);
  margin:1em 0 .4em;}
.contents-list ol{list-style:none;margin:0 0 .2em;padding:0;counter-reset:ch;}
.contents-list li{counter-increment:ch;}
.contents-list .row{display:flex;align-items:baseline;gap:8px;padding:6px 0;
  border-bottom:1px dotted var(--line);font-size:.95rem;}
.contents-list .row::before{content:counter(ch) ".";color:var(--gold);min-width:1.8em;font-variant-numeric:tabular-nums;}
.contents-list .row .t{flex:1;font-family:var(--font-te);}
.contents-list .row .p{color:var(--ink-soft);font-variant-numeric:tabular-nums;font-size:.88rem;font-family:var(--font-body);}
.contents-list .frontmatter{display:flex;justify-content:space-between;gap:8px;padding:7px 0;
  border-bottom:1px dotted var(--line);font-size:.95rem;}
.contents-list .frontmatter .t{font-family:var(--font-te);}
.contents-list .frontmatter .p{color:var(--ink-soft);font-variant-numeric:tabular-nums;font-size:.88rem;}

/* ---------- external / publisher links ---------- */
.ext-links{display:flex;flex-wrap:wrap;gap:12px;margin:18px 0 4px;}

/* ---------- footer ---------- */
footer{background:var(--band);color:var(--band-fg);padding:40px 0 20px;margin-top:60px;}
footer h3{font-family:var(--font-display);color:var(--gold-soft);font-size:1rem;margin:0 0 8px;}
footer a{color:var(--band-fg);}
.footer-grid{display:grid;gap:26px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));}
.footer-grid ul{list-style:none;margin:0;padding:0;}
.footer-bottom{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  border-top:1px solid rgba(255,255,255,.12);margin-top:26px;padding-top:16px;font-size:.82rem;color:#C9D3E4;}

.back-to-top{position:fixed;right:18px;bottom:18px;z-index:70;width:46px;height:46px;
  border-radius:50%;background:var(--gold);color:#1b1305;display:none;align-items:center;
  justify-content:center;text-decoration:none;font-size:1.2rem;box-shadow:var(--shadow);}
.back-to-top.show{display:flex;}

.notice{background:var(--cream-dim);border-left:4px solid var(--gold);border-radius:8px;
  padding:14px 18px;font-size:.9rem;color:var(--ink-soft);margin:20px 0;}
.notice.te{font-size:.98rem;}
.notice strong{color:var(--ink);}

@media print{
  .site-header,.back-to-top,footer,.progress-track,.ext-links{display:none!important;}
  body{background:#fff;color:#000;}
}