/* ============================================================
   Futon — full stylesheet
   CSS variables drive theming: dark (default), light, amoled.
   ============================================================ */

:root {
  --font: "Roboto", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;

  /* Dark theme (default) — Material-ish elevated surface palette */
  --bg:            #1e1e1e;
  --bg-elev-1:     #262626;
  --bg-elev-2:     #2e2e2e;
  --bg-elev-3:     #383838;
  --surface-hover: #333333;
  --text:          #f1f1f1;
  --text-secondary:#b3b3b3;
  --text-disabled: #7a7a7a;
  --accent:        #e5690c;        /* Futon orange */
  --accent-variant:#ff8a3d;
  --accent-text:   #ffffff;
  --error:         #ef5350;
  --ok:            #66bb6a;
  --divider:       #3a3a3a;
  --chip-bg:       #333;
  --shadow-1: 0 1px 3px rgba(0,0,0,.35), 0 1px 2px rgba(0,0,0,.25);
  --shadow-2: 0 3px 6px rgba(0,0,0,.4), 0 2px 4px rgba(0,0,0,.3);
  --shadow-3: 0 10px 24px rgba(0,0,0,.5), 0 4px 8px rgba(0,0,0,.35);
  --radius: 12px;
  --radius-sm: 8px;
  --nav-w: 232px;
  --topbar-h: 60px;
  --bottomnav-h: 60px;
}

html[data-theme="light"] {
  --bg:            #fafafa;
  --bg-elev-1:     #ffffff;
  --bg-elev-2:     #f2f2f2;
  --bg-elev-3:     #e6e6e6;
  --surface-hover: #ececec;
  --text:          #1a1a1a;
  --text-secondary:#5a5a5a;
  --text-disabled: #9e9e9e;
  --accent:        #c2540a;
  --accent-variant:#e5690c;
  --accent-text:   #ffffff;
  --divider:       #ddd;
  --chip-bg:       #eaeaea;
  --shadow-1: 0 1px 3px rgba(0,0,0,.14), 0 1px 2px rgba(0,0,0,.10);
  --shadow-2: 0 3px 6px rgba(0,0,0,.16), 0 2px 4px rgba(0,0,0,.12);
  --shadow-3: 0 10px 24px rgba(0,0,0,.22), 0 4px 8px rgba(0,0,0,.14);
}

html[data-theme="amoled"] {
  --bg:            #000000;
  --bg-elev-1:     #0c0c0c;
  --bg-elev-2:     #161616;
  --bg-elev-3:     #222222;
  --surface-hover: #1d1d1d;
  --text:          #f5f5f5;
  --text-secondary:#aaaaaa;
  --text-disabled: #666;
  --divider:       #242424;
  --chip-bg:       #1a1a1a;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
img { display: block; }
input, select { font-family: inherit; }

.hidden { display: none !important; }
.only-mobile { display: none; }
@media (max-width: 719px) { .only-mobile { display: inline-flex; } .only-desktop { display: none !important; } }

/* ================= App layout ================= */
#app { display: flex; height: 100vh; height: 100dvh; }

.nav-panel { background: var(--bg-elev-1); }

#sidebar {
  width: var(--nav-w);
  flex: 0 0 var(--nav-w);
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--divider);
}
.brand {
  display: flex; align-items: center; gap: 10px;
  padding: 18px 16px 10px;
}
.brand-logo {
  width: 34px; height: 34px; border-radius: 8px;
  background: var(--accent); color: #fff;
  display: grid; place-items: center;
  font-weight: 700; font-size: 13px; letter-spacing: .5px;
}
.brand-name { font-weight: 600; font-size: 16px; flex: 1; }
.sidebar-footer {
  padding: 12px 16px; font-size: 11px; color: var(--text-disabled);
  border-top: 1px solid var(--divider);
}

.nav-list { display: flex; flex-direction: column; padding: 8px; gap: 2px; flex: 1; }
.nav-item {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 14px; border-radius: 999px;
  color: var(--text-secondary); font-size: 14px; font-weight: 500;
  transition: background .15s, color .15s;
  user-select: none;
}
.nav-item:hover { background: var(--surface-hover); color: var(--text); }
.nav-item.active { background: var(--accent); color: var(--accent-text); }
.nav-item.active .nav-icon { opacity: 1; }
.nav-icon {
  font-size: 9px; font-weight: 800; letter-spacing: .5px;
  min-width: 42px; text-align: center; opacity: .65;
}

#main-column { flex: 1; display: flex; flex-direction: column; min-width: 0; }

#topbar {
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 8px;
  padding: 0 16px;
  background: var(--bg-elev-1);
  border-bottom: 1px solid var(--divider);
  z-index: 5;
}
#search-entry {
  flex: 1; max-width: 640px; margin: 0 auto;
  display: flex; align-items: center; gap: 4px;
  background: var(--bg-elev-2);
  border: 1px solid var(--divider);
  border-radius: 999px;
  padding: 0 6px 0 14px; height: 42px;
}
#search-entry:focus-within { border-color: var(--accent); }
.search-icon { color: var(--text-secondary); font-size: 18px; }
#search-input {
  flex: 1; border: 0; outline: 0; background: transparent;
  color: var(--text); font-size: 15px; height: 100%;
}
#search-input::placeholder { color: var(--text-disabled); }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border: 0; border-radius: 50%;
  background: transparent; color: var(--text); font-size: 17px;
  transition: background .15s;
}
.icon-btn:hover { background: var(--surface-hover); }

main#view {
  flex: 1; overflow-y: auto; overscroll-behavior: contain;
  padding: 18px;
  scroll-behavior: smooth;
}
@media (max-width: 719px) { main#view { padding: 12px 12px calc(var(--bottomnav-h) + 16px); } }

/* Bottom nav (mobile) */
#bottomnav {
  display: none;
  position: fixed; left: 0; right: 0; bottom: 0;
  height: var(--bottomnav-h);
  flex-direction: row;
  border-top: 1px solid var(--divider);
  z-index: 20;
  padding-bottom: env(safe-area-inset-bottom);
}
@media (max-width: 719px) {
  #sidebar { display: none; }
  #bottomnav { display: flex; }
  .nav-item { flex-direction: column; gap: 3px; border-radius: 10px; padding: 8px 2px; font-size: 10px; justify-content: center; }
  .nav-icon { min-width: 0; font-size: 11px; opacity: 1; }
}
#bottomnav .nav-item { flex: 1; }

/* ================= Manga grid & cards ================= */
.grid {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
}
@media (min-width: 1600px) { .grid { grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); } }
@media (max-width: 480px) { .grid { grid-template-columns: repeat(auto-fill, minmax(112px, 1fr)); gap: 10px; } }

.card {
  background: var(--bg-elev-1);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-1);
  cursor: pointer;
  transition: transform .15s, box-shadow .15s;
  display: flex; flex-direction: column;
  text-align: left; border: 0; color: inherit; padding: 0;
  width: 100%;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-3); }
.card .cover-wrap {
  position: relative; aspect-ratio: 2 / 3; background: var(--bg-elev-3);
  overflow: hidden;
}
.card .cover-wrap img { width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity .3s; }
.card .cover-wrap img.loaded { opacity: 1; }
.card .badge {
  position: absolute; top: 8px; left: 8px;
  background: rgba(0,0,0,.72); color: #fff;
  font-size: 10px; font-weight: 700; padding: 3px 7px; border-radius: 6px;
  letter-spacing: .4px; text-transform: uppercase;
}
.card .card-body { padding: 9px 10px 11px; }
.card .card-title {
  font-size: 13px; font-weight: 600; line-height: 1.35;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.card .card-sub { font-size: 11px; color: var(--text-secondary); margin-top: 3px; }

/* Skeleton shimmer */
.skeleton-card { pointer-events: none; }
.sk {
  position: relative; overflow: hidden;
  background: var(--bg-elev-2);
}
.sk::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.07), transparent);
  animation: shimmer 1.3s infinite;
}
@keyframes shimmer { from { transform: translateX(-100%);} to { transform: translateX(100%);} }
.sk-cover { aspect-ratio: 2/3; border-radius: 0; }
.sk-line { height: 12px; border-radius: 6px; margin: 9px 10px; }
.sk-line.w60 { width: 60%; }

/* ================= Section headers / toolbar ================= */
.section-head {
  display: flex; align-items: center; flex-wrap: wrap; gap: 10px;
  margin: 2px 0 16px;
}
.section-head h2 { margin: 0; font-size: 22px; font-weight: 700; flex: 1; }
.section-head .sub { color: var(--text-secondary); font-size: 13px; width: 100%; margin-top: -4px; }

.seg-control {
  display: inline-flex; background: var(--bg-elev-2); border-radius: 999px; padding: 3px; gap: 2px;
  border: 1px solid var(--divider);
}
.seg-control button {
  border: 0; background: transparent; color: var(--text-secondary);
  padding: 6px 14px; border-radius: 999px; font-size: 13px; font-weight: 600;
}
.seg-control button.active { background: var(--accent); color: var(--accent-text); }

.filled-btn, .text-btn, .outlined-btn {
  border: 0; border-radius: 999px; padding: 9px 18px;
  font-size: 14px; font-weight: 600;
}
.filled-btn { background: var(--accent); color: var(--accent-text); box-shadow: var(--shadow-1); }
.filled-btn:hover { background: var(--accent-variant); }
.text-btn { background: transparent; color: var(--accent); }
.text-btn:hover { background: var(--surface-hover); }
.outlined-btn { background: transparent; color: var(--text); border: 1px solid var(--divider); }
.outlined-btn:hover { background: var(--surface-hover); }

/* Pagination */
.pagination { display: flex; justify-content: center; align-items: center; gap: 8px; margin: 24px 0 8px; flex-wrap: wrap; }
.pagination button {
  min-width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--divider);
  background: var(--bg-elev-1); color: var(--text); font-weight: 600; font-size: 14px;
}
.pagination button:hover:not(:disabled) { background: var(--surface-hover); }
.pagination button.active { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.pagination button:disabled { opacity: .4; cursor: default; }

/* Empty / error states */
.state-box {
  text-align: center; padding: 56px 24px; color: var(--text-secondary);
}
.state-box .state-art { font-size: 44px; margin-bottom: 12px; opacity: .8; }
.state-box h3 { color: var(--text); margin: 0 0 6px; font-size: 18px; }
.state-box p { margin: 0 auto 16px; max-width: 420px; font-size: 14px; line-height: 1.5; }

/* ================= Details view ================= */
.details-hero {
  display: flex; gap: 22px; margin-bottom: 20px; flex-wrap: wrap;
}
.details-cover {
  width: 190px; flex: 0 0 190px; border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-2); background: var(--bg-elev-3);
}
.details-cover img { width: 100%; aspect-ratio: 2/3; object-fit: cover; }
@media (max-width: 600px) {
  .details-hero { gap: 14px; }
  .details-cover { width: 120px; flex-basis: 120px; margin: 0 auto; }
  .details-info { text-align: center; }
}
.details-info { flex: 1; min-width: 240px; }
.details-info h1 { margin: 0 0 8px; font-size: 26px; line-height: 1.2; }
.details-meta { color: var(--text-secondary); font-size: 13px; margin-bottom: 12px; display: flex; gap: 14px; flex-wrap: wrap; }
.chip-row { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0 14px; }
.chip {
  background: var(--chip-bg); color: var(--text-secondary);
  font-size: 11.5px; font-weight: 600; padding: 4px 11px; border-radius: 999px;
  border: 1px solid var(--divider);
}
.chip.genre { color: var(--accent-variant); }
.description {
  color: var(--text-secondary); font-size: 14px; line-height: 1.6;
  max-height: 118px; overflow: hidden; position: relative; white-space: pre-line;
}
.description.expanded { max-height: none; }
.desc-fade {
  text-align: center; color: var(--accent); font-size: 12.5px; font-weight: 600;
  margin-top: 6px; background: none; border: 0; padding: 2px;
}
.details-actions { display: flex; gap: 10px; margin: 16px 0 4px; flex-wrap: wrap; }
.continue-line {
  background: var(--bg-elev-2); border: 1px solid var(--divider);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm); padding: 11px 14px; margin: 14px 0;
  font-size: 13.5px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.continue-line .grow { flex: 1; }

/* Chapter list */
.chapter-list { display: flex; flex-direction: column; gap: 4px; max-width: 860px; }
.chapter-item {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 14px; border-radius: var(--radius-sm);
  background: var(--bg-elev-1); border: 1px solid transparent;
  cursor: pointer; transition: background .12s, border-color .12s; text-align: left;
  color: inherit; border-width: 1px; border-style: solid; border-color: var(--divider);
}
.chapter-item:hover { background: var(--bg-elev-2); }
.chapter-item.read { opacity: .55; }
.chapter-item .ch-num { font-weight: 700; font-size: 14px; min-width: 64px; }
.chapter-item .ch-title { flex: 1; font-size: 13.5px; color: var(--text-secondary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chapter-item .ch-meta { font-size: 11.5px; color: var(--text-disabled); text-align: right; }
.progress-mini { height: 3px; background: var(--bg-elev-3); border-radius: 2px; overflow: hidden; margin-top: 4px; }
.progress-mini > i { display: block; height: 100%; background: var(--accent); }

/* ================= History list ================= */
.history-list { display: flex; flex-direction: column; gap: 10px; max-width: 860px; }
.history-item {
  display: flex; gap: 14px; align-items: center;
  background: var(--bg-elev-1); border: 1px solid var(--divider);
  border-radius: var(--radius-sm); padding: 10px 12px; cursor: pointer;
}
.history-item .h-cover { width: 46px; height: 69px; border-radius: 6px; overflow: hidden; flex: 0 0 46px; background: var(--bg-elev-3); }
.history-item .h-cover img { width: 100%; height: 100%; object-fit: cover; }
.history-item .h-info { flex: 1; min-width: 0; }
.history-item .h-title { font-weight: 600; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.history-item .h-sub { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }

/* ================= Settings ================= */
.settings-card {
  background: var(--bg-elev-1); border: 1px solid var(--divider);
  border-radius: var(--radius); padding: 6px 16px; max-width: 720px; margin-bottom: 18px;
}
.settings-card h3 { margin: 14px 0 10px; font-size: 15px; }
.setting-row {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 13px 0; border-top: 1px solid var(--divider); font-size: 14.5px;
}
.setting-row:first-of-type { border-top: 0; }
.setting-row .s-sub { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }

/* Switch */
.switch { position: relative; width: 46px; height: 26px; flex: 0 0 46px; }
.switch input { position: absolute; opacity: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }
.switch .slider {
  position: absolute; inset: 0; background: var(--bg-elev-3);
  border-radius: 999px; transition: background .18s;
}
.switch .slider::before {
  content: ""; position: absolute; width: 20px; height: 20px; border-radius: 50%;
  background: #bdbdbd; top: 3px; left: 3px; transition: transform .18s, background .18s;
}
.switch input:checked + .slider { background: var(--accent); }
.switch input:checked + .slider::before { transform: translateX(20px); background: #fff; }

/* Theme picker */
.theme-picker { display: flex; gap: 10px; flex-wrap: wrap; }
.theme-swatch {
  border: 2px solid var(--divider); border-radius: 10px; overflow: hidden;
  background: none; padding: 0; cursor: pointer; color: inherit;
}
.theme-swatch.active { border-color: var(--accent); }
.theme-swatch .sw-body { width: 72px; height: 46px; display: flex; flex-direction: column; }
.theme-swatch .sw-bar { height: 12px; }
.theme-swatch .sw-rest { flex: 1; display: flex; align-items: center; justify-content: center; font-size: 10px; font-weight: 700; }

/* ================= Reader ================= */
#reader-overlay {
  position: fixed; inset: 0; z-index: 100;
  background: #0c0c0c;
  display: flex; flex-direction: column;
}
#reader-toolbar {
  position: absolute; top: 0; left: 0; right: 0; height: 52px;
  display: flex; align-items: center; gap: 8px; padding: 0 10px;
  background: linear-gradient(to bottom, rgba(0,0,0,.85), rgba(0,0,0,0));
  color: #fff; z-index: 6; transition: opacity .2s;
}
#reader-toolbar .reader-title { flex: 1; font-size: 13.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#reader-toolbar .icon-btn { color: #fff; }
#reader-progress-bar { position: absolute; top: 52px; left: 0; right: 0; height: 3px; background: rgba(255,255,255,.12); z-index: 6; }
#reader-progress-fill { height: 100%; background: var(--accent); width: 0%; transition: width .1s linear; }

#reader-content {
  flex: 1; overflow-y: auto; overflow-x: hidden;
  display: flex; flex-direction: column;
  align-items: center;
  -webkit-overflow-scrolling: touch;
  scroll-behavior: auto;
}
#reader-content.mode-paged {
  justify-content: center;
  overflow: hidden;
}

/* Webtoon images: full width, gapless */
.wt-page {
  width: 100%; display: flex; justify-content: center; background: #111; position: relative;
  min-height: 140px; /* keeps layout sane before/without an image */
}
.wt-page img {
  width: 100%; max-width: 1100px; height: auto;
  opacity: 0; transition: opacity .25s;
  background: #1a1a1a;
}
.wt-page img.loaded { opacity: 1; }

/* Paged mode */
.paged-frame { flex: 1; width: 100%; display: flex; align-items: center; justify-content: center; gap: 2px; background: #0c0c0c; }
.paged-img-wrap { flex: 1; height: 100%; display: flex; align-items: center; justify-content: center; }
.paged-img-wrap img { width: 100%; height: 100%; object-fit: contain; }
.paged-img-wrap.empty { /* placeholder slot */ }

/* Per-image loading + error */
.img-placeholder {
  position: absolute; inset: 0; display: grid; place-items: center;
  color: rgba(255,255,255,.45); font-size: 13px; min-height: 140px;
  background: #161616;
}
.spinner {
  width: 30px; height: 30px; border-radius: 50%;
  border: 3px solid rgba(255,255,255,.18); border-top-color: var(--accent);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.img-error-box { text-align: center; }
.img-error-box .retry-link {
  margin-top: 8px; border: 1px solid rgba(255,255,255,.35); border-radius: 6px;
  background: none; color: #fff; padding: 5px 12px; font-size: 12px;
}

#reader-page-nav {
  position: absolute; bottom: 14px; left: 50%; transform: translateX(-50%);
  display: flex; align-items: center; gap: 14px; z-index: 6;
  background: rgba(0,0,0,.75); border-radius: 999px; padding: 6px 10px; color: #fff;
  backdrop-filter: blur(6px);
}
#reader-page-nav .icon-btn { width: 36px; height: 36px; color: #fff; font-size: 22px; }
#reader-page-counter { font-size: 13px; min-width: 74px; text-align: center; font-variant-numeric: tabular-nums; }

#reader-chapter-nav {
  position: absolute; bottom: 14px; left: 12px; right: 12px;
  display: flex; justify-content: space-between; gap: 10px; z-index: 5;
  pointer-events: none;
}
#reader-chapter-nav button {
  pointer-events: auto;
  border: 1px solid rgba(255,255,255,.3); background: rgba(0,0,0,.7); color: #fff;
  border-radius: 999px; padding: 8px 14px; font-size: 12.5px; font-weight: 600;
}
#reader-chapter-nav button:disabled { opacity: .35; pointer-events: none; }

#reader-tapzones { position: absolute; inset: 52px 0 0 0; display: flex; z-index: 4; }
.tapzone { flex: 1; background: none; border: 0; }
.tapzone.middle { flex: 0 0 30%; }

#reader-sheet {
  position: absolute; bottom: 0; left: 0; right: 0; z-index: 8;
  background: #1f1f1f; color: #f1f1f1; border-top: 1px solid #333;
  border-radius: 18px 18px 0 0; padding: 14px 18px calc(14px + env(safe-area-inset-bottom));
  box-shadow: var(--shadow-3);
}
.sheet-row { display: flex; align-items: center; justify-content: space-between; padding: 10px 0; gap: 12px; }
.sheet-row .seg-control button { color: #ddd; }
.sheet-row .seg-control button.active { background: var(--accent); color: #fff; }

/* ================= Dialogs ================= */
.dialog-backdrop {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,.55); display: flex; align-items: center; justify-content: center;
  padding: 18px;
}
.dialog {
  background: var(--bg-elev-1); color: var(--text);
  border-radius: 16px; width: 100%; max-width: 460px; max-height: 86vh; overflow-y: auto;
  box-shadow: var(--shadow-3); padding: 20px;
}
.dialog h3 { margin: 0 0 14px; font-size: 19px; }
.dialog-body { display: flex; flex-direction: column; gap: 16px; }
.filter-group h4 { margin: 0 0 8px; font-size: 13px; color: var(--text-secondary); text-transform: uppercase; letter-spacing: .6px; }
.check-line { display: flex; align-items: center; gap: 10px; padding: 5px 0; font-size: 14.5px; }
.check-line input { width: 18px; height: 18px; accent-color: var(--accent); }
#f-sort {
  width: 100%; padding: 10px 12px; border-radius: 8px;
  border: 1px solid var(--divider); background: var(--bg-elev-2); color: var(--text);
}
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; }

/* Toast */
#toast {
  position: fixed; bottom: calc(var(--bottomnav-h) + 18px); left: 50%; transform: translateX(-50%);
  background: #2b2b2b; color: #f1f1f1; border: 1px solid #444;
  padding: 11px 18px; border-radius: 10px; font-size: 13.5px; z-index: 300;
  box-shadow: var(--shadow-2); max-width: 88vw;
  animation: toast-in .2s ease-out;
}
@keyframes toast-in { from { opacity: 0; transform: translate(-50%, 8px); } to { opacity: 1; transform: translate(-50%, 0);} }

/* Source picker chips on catalogue */
.source-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.source-chip {
  border: 1px solid var(--divider); background: var(--bg-elev-1); color: var(--text);
  border-radius: 999px; padding: 8px 16px; font-size: 13.5px; font-weight: 600;
}
.source-chip.active { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }

/* Lazy fade-in utility */
.fade-in { animation: fade-in .25s ease-out; }
@keyframes fade-in { from { opacity: 0; transform: translateY(6px);} to { opacity: 1; transform: none;} }

/* Scrollbar styling (desktop) */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--bg-elev-3); border-radius: 6px; }
::-webkit-scrollbar-track { background: transparent; }