/* sidebar.css
   Shared sidebar component styles (Echo sidebar / accordion / flyout)
   Load AFTER main26.css + page css
*/

/* ---------- Theme tokens ---------- */
:root{
  --sb-panel-bg: rgba(248,248,248,.92);
  --sb-panel-border: rgba(0,0,0,.08);
  --sb-panel-shadow: 0 4px 20px rgba(0,0,0,.05);

  --sb-card-bg: rgba(255,255,255,.85);
  --sb-card-bg-hover: rgba(255,255,255,1);
  --sb-card-border: rgba(0,0,0,.08);
  --sb-card-border-hover: rgba(0,0,0,.14);

  --sb-soft-bg: rgba(0,0,0,.03);
  --sb-soft-bg-2: rgba(0,0,0,.05);

  --sb-text: inherit;
  --sb-muted: rgba(0,0,0,.55);

  --sb-row-h: 34px;
  --sb-visible-rows: 21;
  --sb-scroll-track: rgba(0,0,0,.06);
  --sb-scroll-thumb: rgba(0,0,0,.18);
  --sb-scroll-thumb-hover: rgba(0,0,0,.28);
}

body.dark_mode{
  --sb-panel-bg: rgba(26,26,26,.92);
  --sb-panel-border: rgba(255,255,255,.05);
  --sb-panel-shadow: 0 10px 30px rgba(0,0,0,.45);

  --sb-card-bg: #1a1a1a;
  --sb-card-bg-hover: #222222;
  --sb-card-border: rgba(255,255,255,.05);
  --sb-card-border-hover: rgba(255,255,255,.10);

  --sb-soft-bg: rgba(255,255,255,.06);
  --sb-soft-bg-2: rgba(255,255,255,.10);

  --sb-muted: rgba(255,255,255,.55);
  --sb-scroll-track: rgba(255,255,255,.06);
  --sb-scroll-thumb: rgba(255,255,255,.20);
  --sb-scroll-thumb-hover: rgba(255,255,255,.32);
}

/* ---------- Sidebar shell ---------- */
:is(.poetry_page,.music_page) .echo_side{
  position: sticky;
  top: 16px;
  height: fit-content;

  border-radius: 18px;
  padding: 16px;

  background: var(--sb-panel-bg);
  border: 1px solid var(--sb-panel-border);
  box-shadow: var(--sb-panel-shadow);
  backdrop-filter: blur(10px);
  color: var(--sb-text);
}

:is(.poetry_page,.music_page) .echo_side_head{
  font-weight: 900;
  letter-spacing: .3px;
  text-align: center;
  padding: 6px 8px 10px;
}

:is(.poetry_page,.music_page) .echo_side_scroll{
  max-height: min(
    calc(var(--sb-visible-rows) * var(--sb-row-h) + 90px),
    calc(100vh - 220px)
  );
  overflow-y: auto;
  padding: 6px;
}

/* ---------- Simple link list variant ---------- */
:is(.poetry_page,.music_page) .echo_side_echo,
:is(.poetry_page,.music_page) .echo_side_item{
  display: block;
  text-align: center;
  min-height: var(--sb-row-h);

  padding: 8px 10px;
  margin-bottom: 6px;

  border-radius: 12px;
  border: 1px solid var(--sb-card-border);
  background: var(--sb-card-bg);

  text-decoration: none;
  color: inherit;

  transition: box-shadow .18s ease, border-color .18s ease, transform .18s ease, background-color .18s ease;
}

:is(.poetry_page,.music_page) .echo_side_echo:hover,
:is(.poetry_page,.music_page) .echo_side_item:hover{
  background: var(--sb-card-bg-hover);
  border-color: var(--sb-card-border-hover);
  box-shadow: 0 8px 22px rgba(0,0,0,.08);
  transform: translateY(-1px);
}

body.dark_mode :is(.poetry_page,.music_page) .echo_side_echo:hover,
body.dark_mode :is(.poetry_page,.music_page) .echo_side_item:hover{
  box-shadow: 0 10px 26px rgba(0,0,0,.45);
}

:is(.poetry_page,.music_page) .echo_side_echo.is_active,
:is(.poetry_page,.music_page) .echo_side_item.is_active{
  background: var(--sb-soft-bg);
  border-color: var(--sb-card-border-hover);
  font-weight: 900;
}

/* ---------- Accordion variant (kept for poetry) ---------- */
:is(.poetry_page,.music_page) .echo_acc_item{
  background: var(--sb-card-bg);
  border: 1px solid var(--sb-card-border);
  border-radius: 14px;
  margin-bottom: 8px;
  overflow: hidden;

  transition: box-shadow .18s ease, border-color .18s ease, transform .18s ease, background-color .18s ease;
}

:is(.poetry_page,.music_page) .echo_acc_item:hover{
  background: var(--sb-card-bg-hover);
  border-color: var(--sb-card-border-hover);
  box-shadow: 0 6px 16px rgba(0,0,0,.08);
  transform: translateY(-1px);
}

body.dark_mode :is(.poetry_page,.music_page) .echo_acc_item:hover{
  box-shadow: 0 10px 26px rgba(0,0,0,.45);
}

:is(.poetry_page,.music_page) .echo_acc_item.is_active{
  background: var(--sb-card-bg-hover);
  border-color: var(--sb-card-border-hover);
  box-shadow: 0 8px 20px rgba(0,0,0,.10);
}

body.dark_mode :is(.poetry_page,.music_page) .echo_acc_item.is_active{
  box-shadow: 0 12px 32px rgba(0,0,0,.55);
}

:is(.poetry_page,.music_page) .echo_acc_head{
  display: block;
  text-align: center;

  padding: 10px 12px;
  min-height: var(--sb-row-h);

  text-decoration: none;
  color: inherit;
  font-weight: 800;
  font-size: 14px;

  transition: background-color .15s ease;
}

:is(.poetry_page,.music_page) .echo_acc_item:hover .echo_acc_head{
  background: var(--sb-soft-bg);
}

:is(.poetry_page,.music_page) .echo_acc_body{
  display: none;
  border-top: 1px solid var(--sb-card-border);
  padding: 10px;
  background: var(--sb-soft-bg);
}

:is(.poetry_page,.music_page) .echo_acc_item.is_open .echo_acc_body,
:is(.poetry_page,.music_page) .echo_acc_item.is_active .echo_acc_body{
  display: block;
}

:is(.poetry_page,.music_page) .echo_acc_title{
  display: block;
  text-align: center;

  padding: 8px 10px;
  margin-bottom: 6px;

  border-radius: 10px;
  border: 1px solid transparent;

  text-decoration: none;
  color: inherit;

  font-size: 13.5px;
  line-height: 1.3;

  transition: box-shadow .18s ease, border-color .18s ease, background-color .18s ease, transform .18s ease;
}

:is(.poetry_page,.music_page) .echo_acc_title:hover{
  background: var(--sb-soft-bg-2);
  border-color: var(--sb-card-border-hover);
  box-shadow: 0 4px 12px rgba(0,0,0,.06);
  transform: translateY(-1px);
}

body.dark_mode :is(.poetry_page,.music_page) .echo_acc_title:hover{
  box-shadow: 0 10px 26px rgba(0,0,0,.45);
}

/* ---------- Flyout panel (kept) ---------- */
:is(.poetry_page,.music_page) .echo_flyout{
  position: absolute;
  left: calc(100% + 14px);
  top: 12px;
  width: 360px;

  border-radius: 16px;
  border: 1px solid var(--sb-card-border);
  background: var(--sb-card-bg-hover);

  box-shadow: 0 18px 48px rgba(0,0,0,.14);

  opacity: 0;
  pointer-events: none;
  transform: translateY(6px);
  transition: opacity .12s ease, transform .12s ease;

  max-height: min(calc(var(--sb-visible-rows) * var(--sb-row-h) + 56px), calc(100vh - 180px));
  display: flex;
  flex-direction: column;
  z-index: 40;
}

body.dark_mode :is(.poetry_page,.music_page) .echo_flyout{
  box-shadow: 0 22px 60px rgba(0,0,0,.60);
}

:is(.poetry_page,.music_page) .echo_flyout.is_open{
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

:is(.poetry_page,.music_page) .echo_fly_head{
  padding: 10px 12px;
  font-weight: 900;
  letter-spacing: .2px;
  text-align: center;
  border-bottom: 1px solid var(--sb-card-border);
}

:is(.poetry_page,.music_page) .echo_fly_scroll{
  padding: 10px;
  overflow-y: auto;
}

:is(.poetry_page,.music_page) .echo_fly_item{
  display:block;
  text-align:center;
  padding: 8px 10px;
  margin-bottom: 6px;

  border-radius: 12px;
  border: 1px solid transparent;

  text-decoration:none;
  color:inherit;

  transition: box-shadow .18s ease, border-color .18s ease, background-color .18s ease, transform .18s ease;
}

:is(.poetry_page,.music_page) .echo_fly_item:hover{
  background: var(--sb-soft-bg-2);
  border-color: var(--sb-card-border-hover);
  box-shadow: 0 8px 22px rgba(0,0,0,.08);
  transform: translateY(-1px);
}

body.dark_mode :is(.poetry_page,.music_page) .echo_fly_item:hover{
  box-shadow: 0 12px 32px rgba(0,0,0,.55);
}

/* ---------- Mobile behavior ---------- */
@media (max-width: 980px){
  :is(.poetry_page,.music_page) .echo_side{ position: relative; top: auto; }

  :is(.poetry_page,.music_page) .echo_flyout{
    position: fixed;
    left: 16px;
    right: 16px;
    top: 92px;
    width: auto;
    max-width: 560px;
    margin: 0 auto;
  }
}

/* ---------- Scrollbars ---------- */
:is(.poetry_page,.music_page) .echo_side_scroll,
:is(.poetry_page,.music_page) .echo_fly_scroll{
  scrollbar-width: thin;
  scrollbar-color: var(--sb-scroll-thumb) var(--sb-scroll-track);
}

:is(.poetry_page,.music_page) .echo_side_scroll::-webkit-scrollbar,
:is(.poetry_page,.music_page) .echo_fly_scroll::-webkit-scrollbar{
  width: 12px;
}

:is(.poetry_page,.music_page) .echo_side_scroll::-webkit-scrollbar-track,
:is(.poetry_page,.music_page) .echo_fly_scroll::-webkit-scrollbar-track{
  background: var(--sb-scroll-track);
  border-radius: 999px;
}

:is(.poetry_page,.music_page) .echo_side_scroll::-webkit-scrollbar-thumb,
:is(.poetry_page,.music_page) .echo_fly_scroll::-webkit-scrollbar-thumb{
  background: var(--sb-scroll-thumb);
  border-radius: 999px;
  border: 3px solid transparent;
  background-clip: content-box;
}

:is(.poetry_page,.music_page) .echo_side_scroll::-webkit-scrollbar-thumb:hover,
:is(.poetry_page,.music_page) .echo_fly_scroll::-webkit-scrollbar-thumb:hover{
  background: var(--sb-scroll-thumb-hover);
  border: 3px solid transparent;
  background-clip: content-box;
}