/* ==========================================================
   UTTARSURI — Bengali-First Literary Platform Stylesheet
   ========================================================== */

:root {
  --cb-primary: #6c63ff;
  --cb-primary-dark: #5548e0;
  --cb-accent: #ff6b6b;
  --cb-ink: #16161d;
  --cb-muted: #6b7280;
  --cb-bg: #fafaff;
  --cb-card-bg: #ffffff;
  --cb-border: #eceef4;
  --cb-radius-lg: 20px;
  --cb-radius-md: 14px;
  --cb-radius-sm: 10px;
  --cb-shadow: 0 10px 30px -12px rgba(30, 20, 90, 0.15);
  --cb-shadow-hover: 0 20px 45px -15px rgba(30, 20, 90, 0.25);
  --cb-font-body: 'Hind Siliguri', 'Plus Jakarta Sans', system-ui, sans-serif;
  --cb-font-serif: 'Noto Serif Bengali', 'Lora', Georgia, serif;
}

[data-bs-theme="dark"] {
  --cb-ink: #f2f2f7;
  --cb-muted: #a3a7b7;
  --cb-bg: #0f0f17;
  --cb-card-bg: #191925;
  --cb-border: #262636;
  --cb-shadow: 0 10px 30px -12px rgba(0,0,0,0.5);
}

* { box-sizing: border-box; }

/* ---------- Accessibility ---------- */
.cb-skip-link {
  position: absolute; top: -100px; left: 1rem; z-index: 3000;
  background: var(--cb-primary); color: #fff; padding: .6rem 1.2rem; border-radius: 0 0 10px 10px;
  font-weight: 700; transition: top .2s ease;
}
.cb-skip-link:focus { top: 0; color: #fff; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 3px solid var(--cb-primary); outline-offset: 2px;
}

body {
  font-family: var(--cb-font-body);
  background: var(--cb-bg);
  color: var(--cb-ink);
  transition: background .25s ease, color .25s ease;
}

a { text-decoration: none; color: inherit; }

/* ---------- Reading progress bar ---------- */
.reading-progress-bar {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: linear-gradient(90deg, var(--cb-primary), var(--cb-accent));
  z-index: 2000; transition: width .1s ease-out;
}

/* ---------- Navbar ---------- */
.cb-navbar {
  background: color-mix(in srgb, var(--cb-bg) 85%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--cb-border);
  padding: .85rem 0;
  z-index: 1030;
}
.cb-brand { font-weight: 800; font-size: 1.3rem; color: var(--cb-ink) !important; font-family: var(--cb-font-serif); }
.cb-brand i { color: var(--cb-primary); }
.navbar-nav .nav-link { font-weight: 600; color: var(--cb-ink); opacity: .8; }
.navbar-nav .nav-link:hover { opacity: 1; color: var(--cb-primary); }

.cb-search { position: relative; }
.cb-search input { border-radius: 999px; padding-right: 40px; border: 1px solid var(--cb-border); background: var(--cb-card-bg); color: var(--cb-ink); }
.cb-search button { position: absolute; right: 4px; top: 50%; transform: translateY(-50%); background: transparent; border: none; color: var(--cb-muted); }

.btn-cb {
  background: linear-gradient(135deg, var(--cb-primary), #8b7bff);
  color: #fff; border: none; border-radius: 999px; font-weight: 700; padding: .5rem 1.3rem;
  box-shadow: 0 8px 20px -8px rgba(108,99,255,.6);
}
.btn-cb:hover { color: #fff; filter: brightness(1.05); transform: translateY(-1px); }
.btn-outline-cb {
  border: 1.5px solid var(--cb-border); border-radius: 999px; font-weight: 700; padding: .5rem 1.3rem; color: var(--cb-ink);
}
.btn-outline-cb:hover { border-color: var(--cb-primary); color: var(--cb-primary); }
.btn-icon { border: none; background: transparent; color: var(--cb-ink); font-size: 1.1rem; }

.cb-avatar-sm { width: 38px; height: 38px; border-radius: 50%; object-fit: cover; border: 2px solid var(--cb-border); }
.cb-avatar-xs { width: 24px; height: 24px; border-radius: 50%; object-fit: cover; }

/* ---------- Flash messages ---------- */
.cb-flash { padding: .75rem 0; font-weight: 600; text-align: center; }
.cb-flash-success { background: #e7fbf0; color: #0a7a3d; }
.cb-flash-error { background: #fde8e8; color: #b3261e; }
.cb-flash-info { background: #e8f1ff; color: #1a56c4; }

/* ---------- Hero ---------- */
.cb-hero {
  padding: 5rem 0 4rem;
  background:
    radial-gradient(circle at 15% 20%, rgba(108,99,255,.18), transparent 45%),
    radial-gradient(circle at 85% 15%, rgba(255,107,107,.15), transparent 40%);
}
.cb-banner-image-wrap {
  border-radius: var(--cb-radius-lg);
  overflow: hidden;
  box-shadow: var(--cb-shadow);
  display: block;
}
.cb-banner-image {
  width: 100%;
  height: auto;
  display: block;
  max-height: 320px;
  object-fit: cover;
}
.cb-hero h1 { font-family: var(--cb-font-serif); font-size: clamp(2.2rem, 4vw, 3.4rem); font-weight: 600; line-height: 1.15; }
.cb-hero h3 { font-family: var(--cb-font-serif); font-weight: 600; }
.cb-hero p.lead { color: var(--cb-muted); font-size: 1.15rem; max-width: 560px; }

/* ---------- Cards ---------- */
.cb-card {
  background: var(--cb-card-bg); border-radius: var(--cb-radius-lg); overflow: auto;
  border: 1px solid var(--cb-border); box-shadow: var(--cb-shadow);
  transition: transform .25s ease, box-shadow .25s ease; display: flex; flex-direction: column;
}
.table-responsive.cb-card {
  overflow-x: auto;
  overflow-y: visible;
}
.cb-card:hover { transform: translateY(-6px); box-shadow: var(--cb-shadow-hover); }
.cb-card-img-link { position: relative; display: block; aspect-ratio: 16/10; overflow: hidden; background: var(--cb-border); }
.cb-card-img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.cb-card:hover .cb-card-img { transform: scale(1.06); }
.cb-card-badge { position: absolute; top: 12px; left: 12px; color: #fff; font-size: .72rem; font-weight: 700; padding: .3rem .7rem; border-radius: 999px; }
.cb-card-body { padding: 1.2rem 1.3rem 1.4rem; display: flex; flex-direction: column; flex: 1; }
.cb-card-meta { display: flex; align-items: center; gap: .4rem; font-size: .82rem; color: var(--cb-muted); margin-bottom: .6rem; }
.cb-author-name { font-weight: 600; color: var(--cb-ink); }
.cb-card-meta .dot { opacity: .5; }
.cb-card-title { font-size: 1.15rem; font-weight: 700; line-height: 1.35; margin-bottom: .5rem; font-family: var(--cb-font-serif); }
.cb-card-title a:hover { color: var(--cb-primary); }
.cb-card-excerpt { color: var(--cb-muted); font-size: .92rem; flex: 1; }
.cb-card-footer { display: flex; gap: 1rem; font-size: .8rem; color: var(--cb-muted); border-top: 1px solid var(--cb-border); padding-top: .8rem; margin-top: .5rem; flex-wrap: wrap; }

/* ---------- Section headings ---------- */
.cb-section-heading { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.8rem; }
.cb-section-heading h2 { font-family: var(--cb-font-serif); font-weight: 600; font-size: 1.9rem; }
.cb-section-heading a { font-weight: 700; color: var(--cb-primary); font-size: .92rem; }

/* ---------- Category pill ---------- */
.cb-cat-pill {
  display: inline-flex; align-items: center; gap: .5rem; padding: .5rem 1.1rem; border-radius: 999px;
  background: var(--cb-card-bg); border: 1px solid var(--cb-border); font-weight: 600; font-size: .88rem;
  transition: all .2s ease;
}
.cb-cat-pill:hover, .cb-cat-pill.active { border-color: var(--cb-primary); color: var(--cb-primary); }

/* ---------- Skeleton loading ---------- */
.skeleton { background: linear-gradient(90deg, var(--cb-border) 25%, #f4f4fb 37%, var(--cb-border) 63%); background-size: 400% 100%; animation: skeleton-loading 1.4s ease infinite; border-radius: var(--cb-radius-md); }
@keyframes skeleton-loading { 0% { background-position: 100% 50%; } 100% { background-position: 0 50%; } }

/* ---------- Blog/Publication detail ---------- */
.cb-blog-content { font-family: var(--cb-font-serif); font-size: 1.15rem; line-height: 1.85; color: var(--cb-ink); }
.cb-blog-content h2, .cb-blog-content h3 { font-family: var(--cb-font-body); font-weight: 700; margin-top: 2rem; }
.cb-blog-content img { max-width: 100%; border-radius: var(--cb-radius-md); margin: 1.5rem 0; }
.cb-blog-content p { margin-bottom: 1.3rem; }
.cb-blog-content code { background: var(--cb-border); padding: .15rem .4rem; border-radius: 5px; }
.cb-share-rail { position: sticky; top: 100px; display: flex; flex-direction: column; gap: .7rem; }
.cb-share-btn { width: 46px; height: 46px; border-radius: 50%; display: flex; align-items: center; justify-content: center; background: var(--cb-card-bg); border: 1px solid var(--cb-border); color: var(--cb-ink); }
.cb-share-btn:hover { background: var(--cb-primary); color: #fff; border-color: var(--cb-primary); }

/* ---------- Comments ---------- */
.cb-comment { display: flex; gap: .9rem; margin-bottom: 1.4rem; }
.cb-comment-body { flex: 1; background: var(--cb-card-bg); border: 1px solid var(--cb-border); border-radius: var(--cb-radius-md); padding: .9rem 1.1rem; }
.cb-comment-replies { margin-left: 2.6rem; margin-top: 1rem; }

/* ---------- Auth pages ---------- */
.cb-auth-wrap { min-height: 80vh; display: flex; align-items: center; }
.cb-auth-card { background: var(--cb-card-bg); border: 1px solid var(--cb-border); border-radius: var(--cb-radius-lg); box-shadow: var(--cb-shadow); padding: 2.5rem; max-width: 460px; margin: 0 auto; }

/* ---------- Dashboard ---------- */
.cb-sidebar { background: var(--cb-card-bg); border: 1px solid var(--cb-border); border-radius: var(--cb-radius-lg); padding: 1.3rem; height: fit-content; }
.cb-sidebar .nav-link { color: var(--cb-ink); font-weight: 600; border-radius: var(--cb-radius-sm); padding: .65rem .9rem; margin-bottom: .3rem; }
.cb-sidebar .nav-link.active { background: var(--cb-primary); color: #fff; }
.cb-sidebar .nav-link:hover:not(.active) { background: var(--cb-border); }
.cb-stat-card { background: var(--cb-card-bg); border: 1px solid var(--cb-border); border-radius: var(--cb-radius-lg); padding: 1.4rem; }
.cb-stat-card .num { font-size: 2rem; font-weight: 800; }
.cb-badge-status { padding: .25rem .7rem; border-radius: 999px; font-size: .74rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; }
.cb-badge-draft { background: #eceef4; color: #555; }
.cb-badge-uploaded { background: #e8f1ff; color: #1a56c4; }
.cb-badge-processing { background: #fff4d6; color: #9a6b00; }
.cb-badge-extracted { background: #e8f1ff; color: #1a56c4; }
.cb-badge-submitted { background: #fff4d6; color: #9a6b00; }
.cb-badge-under_review { background: #fff4d6; color: #9a6b00; }
.cb-badge-needs_correction { background: #fde3e3; color: #b3261e; }
.cb-badge-approved { background: #e2f9ea; color: #12824a; }
.cb-badge-published { background: #e2f9ea; color: #12824a; }
.cb-badge-rejected { background: #fde3e3; color: #b3261e; }
.cb-badge-archived { background: #eceef4; color: #555; }

/* ---------- Homepage / filters ---------- */
.cb-home-layout {
  display: flex;
  gap: 2rem;
  justify-content: center;
  align-items: flex-start;
}
.cb-home-main {
  display: grid;
  gap: 1.5rem;
  flex: 1 1 0;
  max-width: 900px;
  width: 100%;
}
.cb-home-sidebar {
  flex: 0 0 280px;
  width: 280px;
  position: sticky;
  top: 1rem;
  align-self: start;
}
.cb-filter-panel { background: var(--cb-card-bg); border: 1px solid var(--cb-border); border-radius: var(--cb-radius-lg); padding: 1.5rem; }
.cb-filter-panel h3 { margin-bottom: 1rem; font-size: 1.05rem; font-weight: 700; }
.cb-filter-group { margin-bottom: 1.5rem; }
.cb-filter-group label { display: block; margin-bottom: .5rem; font-weight: 600; }
.cb-filter-group select,
.cb-filter-group input { width: 100%; }
.cb-filter-group .form-check { margin-bottom: .75rem; }
.cb-filter-toggler { display: none; }
.cb-home-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; justify-items: center; }
.cb-load-more-wrap { display: flex; justify-content: center; margin-top: 2rem; }
.cb-load-more { min-width: 220px; }

@media (max-width: 991px) {
  .cb-home-layout { flex-direction: column; }
  .cb-home-sidebar { position: static; width: 100%; max-width: 100%; }
  .cb-filter-toggler { display: block; margin-bottom: 1rem; }
  .cb-filter-panel { display: none; }
  .cb-filter-panel.open { display: block; }
}

@media (max-width: 767px) {
  .cb-card { border-radius: 1.1rem; }
  .cb-card-title { font-size: 1.05rem; }
  .cb-card-body { padding: 1rem; }
  .cb-card-footer { font-size: .82rem; gap: .65rem; }
}

/* ---------- Footer ---------- */
.cb-footer { background: var(--cb-card-bg); border-top: 1px solid var(--cb-border); padding: 4rem 0 2rem; margin-top: 5rem; }
.footer-heading { font-weight: 700; margin-bottom: 1rem; font-size: .95rem; }
.footer-links li { margin-bottom: .55rem; }
.footer-links a { color: var(--cb-muted); font-size: .92rem; }
.footer-links a:hover { color: var(--cb-primary); }

.cb-back-to-top {
  position: fixed; bottom: 24px; right: 24px; width: 46px; height: 46px; border-radius: 50%;
  background: var(--cb-primary); color: #fff; border: none; display: none; align-items: center; justify-content: center;
  box-shadow: 0 8px 20px -6px rgba(108,99,255,.6); z-index: 1000;
}

/* ---------- Misc ---------- */
.cb-empty-state { text-align: center; padding: 4rem 1rem; color: var(--cb-muted); }
.cb-pagination .page-link { border-radius: 999px !important; margin: 0 .2rem; border: 1px solid var(--cb-border); color: var(--cb-ink); }
.cb-pagination .page-item.active .page-link { background: var(--cb-primary); border-color: var(--cb-primary); }

/* ---------- Document upload ---------- */
.cb-upload-dropzone {
  border: 2px dashed var(--cb-border);
  border-radius: var(--cb-radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all .2s ease;
  background: var(--cb-card-bg);
}
.cb-upload-dropzone:hover, .cb-upload-dropzone.dragover {
  border-color: var(--cb-primary);
  background: color-mix(in srgb, var(--cb-primary) 5%, var(--cb-card-bg));
}
.cb-upload-dropzone i { font-size: 3rem; color: var(--cb-primary); margin-bottom: 1rem; }

@media (max-width: 991px) {
  .cb-search { order: 3; width: 100%; margin: .75rem 0; }
}