/* ============================================
   Public Past Papers pages — index / listing / detail
   Theme matches the notes "paper & notebook" look.
   ============================================ */

body.papers-page {
  background: var(--paper-bg);
}

/* ---------- top bar (public papers index & older pages) ---------- */
.papers-topbar {
  position: sticky;
  top: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 32px;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--paper-border);
}

.papers-topbar .logo {
  font-size: 1.3rem;
  color: var(--ink);
}

.papers-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: "Outfit", sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-soft);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.papers-breadcrumb a {
  color: var(--ink-muted);
  text-decoration: none;
}

.papers-breadcrumb a:hover {
  color: var(--amber);
}

.papers-breadcrumb i {
  color: var(--ink-muted);
  font-size: 0.95rem;
}

.papers-breadcrumb .current {
  color: var(--ink);
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
}

.papers-topbar-actions a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 10px;
  border: 1px solid var(--paper-line);
  background: var(--paper-card);
  color: var(--ink-soft);
  font-family: "Outfit", sans-serif;
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.papers-topbar-actions a:hover {
  border-color: var(--paper-accent);
  color: var(--ink);
}

/* ============================================
   Navbar — 1:1 copy of the notes page top navbar
   (body.papers-page swaps in for notes-page;
   global classes copied verbatim from style_notes.css)
   ============================================ */
body.papers-page .navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  padding: 24px 48px;
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle i {
  color: var(--text);
  font-size: 1.5rem;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
}

.profile-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.profile-btn span {
  font-family: "Outfit", sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--bg-dark);
}

.profile-btn:hover {
  transform: translateY(-2px);
}

.profile-wrapper {
  position: relative;
}

.profile-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 6px;
  min-width: 160px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  z-index: 100;
}

.profile-wrapper.open .profile-dropdown {
  display: block;
}

.profile-dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
  font-family: "Outfit", sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.15s ease;
}

.profile-dropdown-item:hover {
  background: var(--bg-light);
}

.profile-dropdown-item i {
  font-size: 1.1rem;
  opacity: 0.7;
}

/* frosted-paper overrides (mirrors body.notes-page in style_notes.css) */
body.papers-page .navbar {
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--paper-border);
}

body.papers-page .navbar .logo {
  background: none;
  -webkit-background-clip: border-box;
  -webkit-text-fill-color: var(--ink);
  background-clip: border-box;
  color: var(--ink);
}

body.papers-page .profile-btn {
  background: var(--ink);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

body.papers-page .profile-btn:hover {
  filter: none;
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.2);
}

/* sign-in link (anonymous visitors) */
.papers-signin-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 10px;
  border: 1px solid var(--paper-line);
  background: var(--paper-card);
  color: var(--ink-soft);
  font-family: "Outfit", sans-serif;
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.papers-signin-btn:hover {
  border-color: var(--paper-accent);
  color: var(--ink);
}

/* ---------- main layout ---------- */
.papers-main {
  max-width: 1100px;
  margin: 89px auto 0;
  padding: 40px 32px 80px;
  transition: margin-right 0.3s ease;
}

/* ---------- page heading ---------- */
.papers-heading {
  margin-bottom: 32px;
}

.papers-heading h1 {
  font-family: "Outfit", sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
}

.papers-heading .papers-sub {
  font-family: "Outfit", sans-serif;
  font-size: 1rem;
  color: var(--ink-muted);
}

/* ---------- paper search + filter toolbar ---------- */
.papers-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.papers-toolbar .papers-search {
  flex: 1;
  min-width: 0;
  height: 52px;
  margin-bottom: 0;
}

/* ---------- paper search ---------- */
.papers-search {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 8px 16px;
  background: var(--paper-card);
  border: 1px solid var(--paper-line);
  border-radius: 10px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.papers-search:focus-within {
  border-color: var(--paper-accent);
  box-shadow: 0 0 0 3px rgba(96, 82, 30, 0.08);
}

.papers-search > i {
  color: var(--ink-muted);
  font-size: 1.15rem;
  flex-shrink: 0;
}

.papers-search input {
  flex: 1;
  min-width: 0;
  border: none;
  outline: none;
  background: transparent;
  font-family: "Outfit", sans-serif;
  font-size: 0.95rem;
  color: var(--ink);
}

.papers-search input::placeholder {
  color: var(--ink-muted);
  opacity: 0.8;
}

.papers-search-clear {
  display: none;
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  border: none;
  border-radius: 50%;
  background: var(--paper-bg);
  color: var(--ink-muted);
  font-size: 1rem;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease, color 0.2s ease;
}

.papers-search-clear:hover {
  background: var(--paper-line);
  color: var(--ink);
}

/* ---------- filter button + dropdown ---------- */
.papers-filter {
  position: relative;
  flex-shrink: 0;
}

.papers-filter-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 52px;
  padding: 8px 18px;
  background: var(--paper-card);
  border: 1px solid var(--paper-line);
  border-radius: 10px;
  color: var(--ink-soft);
  font-family: "Outfit", sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.papers-filter-btn:hover {
  border-color: var(--paper-accent);
  color: var(--ink);
}

.papers-filter-btn.has-active {
  background: #f7e8c0;
  border-color: var(--paper-accent);
  color: #6b4a1d;
}

.papers-filter-btn i {
  font-size: 1.15rem;
  flex-shrink: 0;
}

.papers-filter-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 340px;
  max-width: calc(100vw - 32px);
  max-height: min(72vh, 600px);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
  background: var(--paper-card);
  border: 1px solid var(--paper-border);
  border-radius: 14px;
  box-shadow: 0 12px 36px rgba(60, 40, 10, 0.16);
  padding: 18px;
  z-index: 120;
}

.papers-filter-menu[hidden] {
  display: none;
}

.papers-filter-menu-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 2px;
}

.papers-filter-title {
  font-family: "Outfit", sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink);
}

.papers-filter-clear {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 10px;
  border: 1px solid var(--paper-line);
  border-radius: 16px;
  background: transparent;
  color: var(--ink-muted);
  font-family: "Outfit", sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.papers-filter-clear:hover {
  border-color: var(--paper-accent);
  background: #f7e8c0;
  color: #6b4a1d;
}

.papers-filter-clear-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border-radius: 8px;
  background: var(--paper-accent);
  color: var(--paper-card);
  font-size: 0.7rem;
  font-weight: 700;
}

.papers-filter-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.papers-filter-heading {
  font-family: "Outfit", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--ink-muted);
}

.papers-filter-options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.papers-filter-option {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 12px 5px 8px;
  border: 1px solid var(--paper-line);
  border-radius: 20px;
  background: transparent;
  color: var(--ink-soft);
  font-family: "Outfit", sans-serif;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.papers-filter-option:hover {
  border-color: var(--paper-accent);
  color: var(--ink);
}

.papers-filter-option.active {
  background: #e6d3a0;
  border-color: var(--paper-accent);
  color: #543a12;
}

.papers-filter-option-x {
  display: none;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.papers-filter-option.active .papers-filter-option-x {
  display: inline-flex;
}

/* chapter -> topic groups within the filter menu */
.papers-filter-chapters {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.papers-filter-chapter {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.papers-filter-subheading {
  font-family: "Outfit", sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-soft);
}

/* matched-question chips under each paper block */
.paper-block-topics {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--paper-line);
}

.pq-group {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.pq-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 12px;
  border: 1px solid var(--paper-line);
  border-radius: 14px;
  background: var(--paper-card);
  color: var(--ink-soft);
  font-family: "Outfit", sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.pq-chip:hover {
  border-color: var(--paper-accent);
  background: #f7e8c0;
  color: #6b4a1d;
}

.pq-chip-ms {
  padding: 4px 10px;
  font-size: 0.72rem;
  color: var(--ink-muted);
}

/* ---------- subject index grid ---------- */
.papers-subject-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.papers-subject-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
  background: var(--paper-card);
  border: 1px solid var(--paper-border);
  border-radius: 14px;
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.papers-subject-card:hover {
  border-color: var(--paper-accent);
  transform: translateY(-2px);
}

.papers-subject-card .subject-name {
  font-family: "Outfit", sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
}

.papers-subject-card .subject-meta {
  font-family: "Outfit", sans-serif;
  font-size: 0.85rem;
  color: var(--ink-muted);
  display: flex;
  gap: 12px;
}

/* ---------- listing ---------- */
.papers-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.paper-block {
  background: var(--paper-card);
  border: 1px solid var(--paper-border);
  border-radius: 14px;
  padding: 22px 26px;
  transition: border-color 0.2s ease;
}

.paper-block:hover {
  border-color: var(--paper-accent);
}

.paper-block-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.paper-code {
  font-family: "Outfit", sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
}

.paper-code:hover {
  color: var(--amber);
  text-decoration: underline;
}

.paper-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.paper-meta .chip {
  font-family: "Outfit", sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--ink-soft);
  background: var(--paper-bg);
  border: 1px solid var(--paper-line);
  padding: 4px 10px;
  border-radius: 20px;
}

.paper-block-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.pdf-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid var(--paper-line);
  background: var(--paper-bg);
  color: var(--ink);
  font-family: "Outfit", sans-serif;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.pdf-btn:hover {
  background: var(--paper-card);
  border-color: var(--paper-accent);
}

.pdf-btn i {
  color: var(--ink-muted);
  font-size: 1rem;
}

.pdf-btn.primary {
  background: var(--ink);
  color: #fff8ea;
  border-color: var(--ink);
}

.pdf-btn.primary:hover {
  background: var(--ink-soft);
  border-color: var(--ink-soft);
}

.pdf-btn.primary i {
  color: #e8dfc8;
}

/* ---------- per-paper detail ---------- */
.paper-detail-card {
  background: var(--paper-card);
  border: 1px solid var(--paper-border);
  border-radius: 16px;
  padding: 36px;
  margin-bottom: 24px;
}

.paper-detail-card .paper-code {
  font-size: 2rem;
  margin-bottom: 12px;
}

.paper-detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.paper-detail-meta .chip {
  font-family: "Outfit", sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-soft);
  background: var(--paper-bg);
  border: 1px solid var(--paper-line);
  padding: 6px 14px;
  border-radius: 20px;
}

.paper-detail-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.paper-pager {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.paper-pager a {
  font-family: "Outfit", sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--amber);
  text-decoration: none;
  padding: 10px 14px;
  border: 1px solid var(--paper-line);
  border-radius: 10px;
  background: var(--paper-card);
}

.paper-pager a:hover {
  border-color: var(--paper-accent);
  text-decoration: none;
}

.paper-pager .next {
  margin-left: auto;
}

/* ---------- empty state ---------- */
.papers-empty {
  font-family: "Outfit", sans-serif;
  font-size: 1rem;
  color: var(--ink-muted);
  text-align: center;
  padding: 60px 20px;
}

/* ============================================
   Split-screen PDF viewer (same classes as notes page)
   ============================================ */

.pdf-viewer {
  display: none;
  position: fixed;
  top: 89px;
  left: 80px;
  right: 0;
  bottom: 0;
  height: calc(100vh - 89px);
  flex-direction: column;
  background: var(--paper-card);
  z-index: 90;
}

body.split-screen .pdf-viewer {
  display: flex;
}

.pdf-viewer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--paper-bg);
  border-bottom: 1px solid var(--paper-border);
  flex-shrink: 0;
}

.pdf-viewer-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
  flex-wrap: wrap;
}

.pdf-viewer-title {
  font-family: "Outfit", sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* topic-task capsule: sits in the header right next to the QP/MS toggle */
.pdf-viewer-chips {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.pdf-viewer-chips .pq-chip {
  cursor: default;
}

.pdf-viewer-chips .pq-chip.active {
  border-color: var(--paper-accent);
  background: #f7e8c0;
  color: #6b4a1d;
}

/* ---------- topic guidance toast (top-center) ---------- */
.papers-toast {
  position: fixed;
  top: 16px;
  left: 50%;
  z-index: 300;
  pointer-events: none;
  animation: papers-toast-move 6s ease forwards;
}

.papers-toast-inner {
  min-width: 240px;
  max-width: 360px;
  padding: 14px 20px;
  background: rgba(15, 11, 6, 0.78);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  backdrop-filter: blur(16px) saturate(1.3);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 16px;
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.35);
  font-family: "Outfit", sans-serif;
  text-align: center;
  will-change: clip-path;
  animation: papers-toast-pop 6s ease forwards;
}

.papers-toast-head {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 8px;
}

.papers-toast-line + .papers-toast-line {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.papers-toast-q {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
}

.papers-toast-topic {
  display: block;
  margin-top: 2px;
  font-size: 0.76rem;
  color: rgba(255, 255, 255, 0.78);
}

/* Distinct phases: the dot drops down, parks briefly, opens into the card,
   holds, collapses back to the dot, then rises away. Radius ~210px covers
   the whole card (half-width 180 + corners). */
@keyframes papers-toast-pop {
  0% {
    clip-path: circle(6px at 50% 50%);
    opacity: 0;
  }
  8% {
    clip-path: circle(6px at 50% 50%);
    opacity: 1;
  }
  20% {
    clip-path: circle(210px at 50% 50%);
    opacity: 1;
  }
  80% {
    clip-path: circle(210px at 50% 50%);
    opacity: 1;
  }
  90% {
    clip-path: circle(6px at 50% 50%);
    opacity: 1;
  }
  100% {
    clip-path: circle(6px at 50% 50%);
    opacity: 0;
  }
}

/* The dot drops in from above, stays level through the open/collapse, then
   rises back out. */
@keyframes papers-toast-move {
  0% {
    transform: translate(-50%, -56px);
  }
  10% {
    transform: translate(-50%, 0);
  }
  86% {
    transform: translate(-50%, 0);
  }
  100% {
    transform: translate(-50%, -56px);
  }
}

.pdf-viewer-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border: 1px solid var(--paper-line);
  border-radius: 8px;
  background: var(--paper-card);
  color: var(--ink);
  font-family: "Outfit", sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  flex-shrink: 0;
}

.pdf-viewer-toggle:hover {
  border-color: var(--paper-accent);
}

.pdf-viewer-toggle i {
  color: var(--ink-muted);
  font-size: 0.85rem;
}

.pdf-viewer-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.pdf-viewer-external {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-muted);
}

.pdf-viewer-external:hover {
  background: var(--paper-bg);
  color: var(--ink);
}

.pdf-viewer-external i {
  font-size: 1.1rem;
  color: inherit;
}

.pdf-viewer-close {
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--ink-muted);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pdf-viewer-close:hover {
  background: var(--paper-bg);
  color: var(--ink);
}

.pdf-viewer-iframe {
  flex: 1;
  border: none;
  width: 100%;
  background: var(--paper-bg);
}

.pdf-viewer-nav {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 8px 20px;
  background: var(--paper-bg);
  border-bottom: 1px solid var(--paper-border);
  flex-shrink: 0;
}

body.split-screen .pdf-viewer-nav {
  display: flex;
}

.pdf-nav-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  border: 1px solid var(--paper-line);
  border-radius: 8px;
  background: var(--paper-card);
  color: var(--ink);
  font-family: "Outfit", sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
}

.pdf-nav-btn:hover:not(:disabled) {
  border-color: var(--paper-accent);
}

.pdf-nav-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

.pdf-nav-btn i {
  font-size: 0.9rem;
  color: var(--ink-muted);
}

.pdf-nav-counter {
  font-family: "Outfit", sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-muted);
  min-width: 40px;
  text-align: center;
}

@media (max-width: 768px) {
  .pdf-viewer {
    width: 100vw;
  }
}

/* ---------- small screens ---------- */
@media (max-width: 600px) {
  .papers-main {
    padding: 28px 16px 60px;
  }

  .papers-heading h1 {
    font-size: 1.6rem;
  }

  .paper-detail-card {
    padding: 24px;
  }

  .papers-toolbar {
    gap: 8px;
  }
  .papers-filter-btn {
    padding: 8px 12px;
    height: 52px;
  }
  .papers-filter-btn span {
    display: none;
  }
  .papers-filter-btn i {
    font-size: 1.25rem;
  }
}
/* ---------- primary tab rail (matches notes chrome) ---------- */
.papers-tabs {
  position: fixed;
  top: 89px;
  left: 0;
  width: 80px;
  height: calc(100vh - 89px);
  background: var(--paper-card);
  border-right: 1px solid var(--paper-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 8px;
  gap: 8px;
  z-index: 90;
}

.papers-tab {
  width: 100%;
  padding: 12px 8px;
  border: none;
  border-radius: 10px;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease;
}

.papers-tab:hover {
  background: #f3edd9;
  color: var(--text);
}

.papers-tab.active {
  background: #f7e8c0;
  color: #6b4a1d;
}

.papers-tab i {
  font-size: 1.3rem;
  color: inherit;
}

.papers-tab-label {
  font-family: "Outfit", sans-serif;
  font-size: 0.7rem;
  font-weight: 500;
  color: inherit;
  text-align: center;
}

/* clear the fixed left rail so content isn't hidden underneath on desktop */
@media (min-width: 769px) {
  body.papers-page.has-tab-rail .papers-main {
    padding-left: calc(32px + 80px);
  }
}

/* ---------- mobile bottom nav ---------- */
.papers-bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 95;
  display: none;
  align-items: center;
  justify-content: space-around;
  background: var(--paper-card);
  border-top: 1px solid var(--paper-line);
  box-shadow: 0 -6px 16px rgba(90, 70, 30, 0.1);
  padding: 6px 0 calc(6px + env(safe-area-inset-bottom));
}

.papers-bottom-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 8px 14px;
  color: var(--ink-muted);
  text-decoration: none;
}

.papers-bottom-item i {
  font-size: 1.35rem;
}

.papers-bottom-item:hover {
  background: var(--paper-border);
  color: var(--ink);
}

.papers-bottom-item.active {
  background: #f7e8c0;
  color: #6b4a1d;
}

.papers-bottom-label {
  font-family: "Outfit", sans-serif;
  font-size: 0.72rem;
  font-weight: 500;
}

@media (max-width: 768px) {
  .papers-tabs {
    display: none;
  }
  .papers-bottom-nav {
    display: flex;
  }
  body.papers-page .papers-main {
    padding-bottom: 90px;
    margin-top: 72px;
  }

  /* mobile navbar — compact, mirror notes */
  body.papers-page .navbar {
    height: auto;
    padding: 16px 24px;
  }
  body.papers-page .pdf-viewer {
    top: 72px;
    left: 0;
    height: calc(100vh - 72px);
  }
}