/* ============================================================
   BareMetalStyles — compact CSS framework with short class names
   Implements only the Bootstrap 5 subset actually used by
   PicoWAL, BareMetalWeb, and RP2350B_Bitnet.
   ============================================================ */

/* --- Custom Properties (Theming) --- */
:root {
  --bs-font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --bs-font-mono: SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --bs-body-bg: #fff;
  --bs-body-color: #212529;

  /* palette */
  --bs-primary: #0d6efd; --bs-primary-rgb: 13,110,253;
  --bs-secondary: #6c757d; --bs-secondary-rgb: 108,117,125;
  --bs-success: #198754; --bs-success-rgb: 25,135,84;
  --bs-danger: #dc3545; --bs-danger-rgb: 220,53,69;
  --bs-warning: #ffc107; --bs-warning-rgb: 255,193,7;
  --bs-info: #0dcaf0; --bs-info-rgb: 13,202,240;
  --bs-light: #f8f9fa; --bs-light-rgb: 248,249,250;
  --bs-dark: #212529; --bs-dark-rgb: 33,37,41;
  --bs-white: #fff;

  /* spacing scale: 0=0, 1=.25rem, 2=.5rem, 3=1rem, 4=1.5rem, 5=3rem */
  --sp-0: 0; --sp-1: .25rem; --sp-2: .5rem; --sp-3: 1rem; --sp-4: 1.5rem; --sp-5: 3rem;

  /* gutter */
  --bs-gutter-x: 1.5rem;
  --bs-gutter-y: 0;

  /* borders */
  --bs-border-width: 1px;
  --bs-border-color: #dee2e6;
  --bs-border-radius: .375rem;
  --bs-border-radius-sm: .25rem;
  --bs-border-radius-lg: .5rem;
  --bs-border-radius-pill: 50rem;

  /* focus ring */
  --bs-focus-ring: 0 0 0 .25rem rgba(13,110,253,.25);

  /* transitions */
  --bs-transition: all .15s ease-in-out;
}

/* --- Targeted Reset --- */
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; font-family: var(--bs-font-sans); font-size: 1rem; line-height: 1.5; color: var(--bs-body-color); background: var(--bs-body-bg); -webkit-text-size-adjust: 100%; }
img, svg { max-width: 100%; vertical-align: middle; }
button, input, select, textarea { font: inherit; margin: 0; }
table { border-collapse: collapse; caption-side: bottom; }
th { text-align: inherit; }

/* ============================================================
   LAYOUT / GRID  (flexbox-based, 12-column)
   ============================================================ */
.bx, .bx-f { width: 100%; padding-right: calc(var(--bs-gutter-x) * .5); padding-left: calc(var(--bs-gutter-x) * .5); margin: 0 auto; }
@media (min-width: 576px) { .bx { max-width: 540px; } }
@media (min-width: 768px) { .bx { max-width: 720px; } }
@media (min-width: 992px) { .bx { max-width: 960px; } }
@media (min-width: 1200px) { .bx { max-width: 1140px; } }
@media (min-width: 1400px) { .bx { max-width: 1320px; } }
.rw { display: flex; flex-wrap: wrap; margin-top: calc(-1 * var(--bs-gutter-y)); margin-right: calc(-.5 * var(--bs-gutter-x)); margin-left: calc(-.5 * var(--bs-gutter-x)); }
.rw > * { flex-shrink: 0; width: 100%; max-width: 100%; padding-right: calc(var(--bs-gutter-x) * .5); padding-left: calc(var(--bs-gutter-x) * .5); margin-top: var(--bs-gutter-y); }

/* gap overrides for row */
.g2 { --bs-gutter-x: .5rem; --bs-gutter-y: .5rem; }
.g3 { --bs-gutter-x: 1rem; --bs-gutter-y: 1rem; }

.ca { flex: 0 0 auto; width: auto; }
.c12 { flex: 0 0 auto; width: 100%; }
.c1 { flex: 0 0 auto; width: 8.3333%; } .col-2 { flex: 0 0 auto; width: 16.6667%; }
.c3 { flex: 0 0 auto; width: 25%; } .col-4 { flex: 0 0 auto; width: 33.3333%; }
.c5 { flex: 0 0 auto; width: 41.6667%; } .col-6 { flex: 0 0 auto; width: 50%; }
.c7 { flex: 0 0 auto; width: 58.3333%; } .col-8 { flex: 0 0 auto; width: 66.6667%; }
.c9 { flex: 0 0 auto; width: 75%; } .col-10 { flex: 0 0 auto; width: 83.3333%; }
.c11 { flex: 0 0 auto; width: 91.6667%; }

/* sm (≥576px) */
@media (min-width: 576px) {
  .cs1 { flex: 0 0 auto; width: 8.3333%; } .col-sm-2 { flex: 0 0 auto; width: 16.6667%; }
  .cs3 { flex: 0 0 auto; width: 25%; } .col-sm-4 { flex: 0 0 auto; width: 33.3333%; }
  .cs5 { flex: 0 0 auto; width: 41.6667%; } .col-sm-6 { flex: 0 0 auto; width: 50%; }
  .cs7 { flex: 0 0 auto; width: 58.3333%; } .col-sm-8 { flex: 0 0 auto; width: 66.6667%; }
  .cs9 { flex: 0 0 auto; width: 75%; } .col-sm-10 { flex: 0 0 auto; width: 83.3333%; }
  .cs11 { flex: 0 0 auto; width: 91.6667%; } .col-sm-12 { flex: 0 0 auto; width: 100%; }
}

/* md (≥768px) */
@media (min-width: 768px) {
  .cm1 { flex: 0 0 auto; width: 8.3333%; } .col-md-2 { flex: 0 0 auto; width: 16.6667%; }
  .cm3 { flex: 0 0 auto; width: 25%; } .col-md-4 { flex: 0 0 auto; width: 33.3333%; }
  .cm5 { flex: 0 0 auto; width: 41.6667%; } .col-md-6 { flex: 0 0 auto; width: 50%; }
  .cm7 { flex: 0 0 auto; width: 58.3333%; } .col-md-8 { flex: 0 0 auto; width: 66.6667%; }
  .cm9 { flex: 0 0 auto; width: 75%; } .col-md-10 { flex: 0 0 auto; width: 83.3333%; }
  .cm11 { flex: 0 0 auto; width: 91.6667%; } .col-md-12 { flex: 0 0 auto; width: 100%; }
  .dbl { display: block !important; }
  .dn { display: none !important; }
}

/* xl (≥1200px) */
@media (min-width: 1200px) {
  .cx1 { flex: 0 0 auto; width: 8.3333%; } .col-xl-2 { flex: 0 0 auto; width: 16.6667%; }
  .cx3 { flex: 0 0 auto; width: 25%; } .col-xl-4 { flex: 0 0 auto; width: 33.3333%; }
  .cx5 { flex: 0 0 auto; width: 41.6667%; } .col-xl-6 { flex: 0 0 auto; width: 50%; }
  .cx7 { flex: 0 0 auto; width: 58.3333%; } .col-xl-8 { flex: 0 0 auto; width: 66.6667%; }
  .cx9 { flex: 0 0 auto; width: 75%; } .col-xl-10 { flex: 0 0 auto; width: 83.3333%; }
  .cx11 { flex: 0 0 auto; width: 91.6667%; } .col-xl-12 { flex: 0 0 auto; width: 100%; }
}

/* ============================================================
   DISPLAY / FLEXBOX
   ============================================================ */
.dn { display: none !important; }
.dbl { display: block !important; }
.dib { display: inline-block !important; }
.fx { display: flex !important; }
.fxi { display: inline-flex !important; }

.fx-c { flex-direction: column !important; }
.fx-fl { flex: 1 1 auto !important; }
.fx-g1 { flex-grow: 1 !important; }
.fx-s0 { flex-shrink: 0 !important; }
.fx-w { flex-wrap: wrap !important; }

.ai-s { align-items: flex-start !important; }
.ai-c { align-items: center !important; }
.ai-e { align-items: flex-end !important; }
.ai-b { align-items: baseline !important; }

.jc-b { justify-content: space-between !important; }
.jc-c { justify-content: center !important; }

.gp1 { gap: var(--sp-1) !important; }
.gp2 { gap: var(--sp-2) !important; }
.gp3 { gap: var(--sp-3) !important; }

.fle { float: right !important; }

/* ============================================================
   SPACING  (m/p  b/t/s/e/x/y  0-5 + auto)
   ============================================================ */
.m0 { margin: var(--sp-0) !important; } .m-3 { margin: var(--sp-3) !important; } .m-auto { margin: auto !important; }
.mt1 { margin-top: var(--sp-1) !important; } .mt-2 { margin-top: var(--sp-2) !important; } .mt-3 { margin-top: var(--sp-3) !important; } .mt-4 { margin-top: var(--sp-4) !important; }
.mb0 { margin-bottom: var(--sp-0) !important; } .mb-1 { margin-bottom: var(--sp-1) !important; } .mb-2 { margin-bottom: var(--sp-2) !important; } .mb-3 { margin-bottom: var(--sp-3) !important; } .mb-4 { margin-bottom: var(--sp-4) !important; }
.ms1 { margin-inline-start: var(--sp-1) !important; } .ms-2 { margin-inline-start: var(--sp-2) !important; } .ms-auto { margin-inline-start: auto !important; }
.me1 { margin-inline-end: var(--sp-1) !important; } .me-2 { margin-inline-end: var(--sp-2) !important; } .me-3 { margin-inline-end: var(--sp-3) !important; }
.mx3 { margin-inline: var(--sp-3) !important; }

.p0 { padding: var(--sp-0) !important; } .p-1 { padding: var(--sp-1) !important; } .p-2 { padding: var(--sp-2) !important; } .p-3 { padding: var(--sp-3) !important; } .p-4 { padding: var(--sp-4) !important; } .p-5 { padding: var(--sp-5) !important; }
.pt2 { padding-top: var(--sp-2) !important; } .pt-3 { padding-top: var(--sp-3) !important; }
.pb1 { padding-bottom: var(--sp-1) !important; } .pb-3 { padding-bottom: var(--sp-3) !important; }
.ps0 { padding-inline-start: var(--sp-0) !important; } .ps-3 { padding-inline-start: var(--sp-3) !important; } .ps-4 { padding-inline-start: var(--sp-4) !important; }
.px2 { padding-inline: var(--sp-2) !important; } .px-3 { padding-inline: var(--sp-3) !important; }
.py0 { padding-block: var(--sp-0) !important; } .py-1 { padding-block: var(--sp-1) !important; } .py-2 { padding-block: var(--sp-2) !important; } .py-3 { padding-block: var(--sp-3) !important; } .py-4 { padding-block: var(--sp-4) !important; } .py-5 { padding-block: var(--sp-5) !important; }

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
small, .sm { font-size: .875em; }
.ld { font-size: 1.25rem; font-weight: 300; }
.dp4 { font-size: 3.5rem; font-weight: 300; line-height: 1.2; }
.dp5 { font-size: 3rem; font-weight: 300; line-height: 1.2; }
.fz2 { font-size: 2rem !important; } .fs-5 { font-size: 1.25rem !important; } .fs-6 { font-size: 1rem !important; }
.fb { font-weight: 700 !important; } .fw-semibold { font-weight: 600 !important; }
.fi { font-style: italic !important; }
.tc { text-align: center !important; } .text-end { text-align: end !important; }
.tnw { white-space: nowrap !important; }
.ttr { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tup { text-transform: uppercase !important; }
.lu { padding-left: 0; list-style: none; }

/* ============================================================
   TEXT / BG COLORS
   ============================================================ */
.fg-p { color: var(--bs-primary) !important; }
.fg-ok { color: var(--bs-success) !important; }
.fg-er { color: var(--bs-danger) !important; }
.fg-wn { color: var(--bs-warning) !important; }
.fg-dk { color: var(--bs-dark) !important; }
.fg-wh { color: var(--bs-white) !important; }
.fg-lt { color: var(--bs-light) !important; }
.fg-m { color: var(--bs-secondary) !important; opacity: .75; }
.fg-rs { color: inherit !important; }

.bg-p { background-color: var(--bs-primary) !important; color: #fff; }
.bg-s { background-color: var(--bs-secondary) !important; color: #fff; }
.bg-ok { background-color: var(--bs-success) !important; color: #fff; }
.bg-er { background-color: var(--bs-danger) !important; color: #fff; }
.bg-wn { background-color: var(--bs-warning) !important; color: #212529; }
.bg-in { background-color: var(--bs-info) !important; color: #212529; }
.bg-lt { background-color: var(--bs-light) !important; color: #212529; }
.bg-tr { background-color: transparent !important; }
.bg-bs { background-color: #e9ecef !important; }
.bg-ps { background-color: rgba(var(--bs-primary-rgb), .1) !important; }

/* ============================================================
   BORDERS / ROUNDING / SHADOWS
   ============================================================ */
.bo { border: var(--bs-border-width) solid var(--bs-border-color) !important; }
.bo0 { border: 0 !important; }
.bo2 { border-width: 2px !important; }
.bot { border-top: var(--bs-border-width) solid var(--bs-border-color) !important; }
.bob { border-bottom: var(--bs-border-width) solid var(--bs-border-color) !important; }
.bo-p { border-color: var(--bs-primary) !important; }
.bo-s { border-color: var(--bs-secondary) !important; }
.bo-ok { border-color: var(--bs-success) !important; }
.bo-wn { border-color: var(--bs-warning) !important; }

.rd { border-radius: var(--bs-border-radius) !important; }
.rd3 { border-radius: var(--bs-border-radius-lg) !important; }
.rdc { border-radius: 50% !important; }
.rdp { border-radius: var(--bs-border-radius-pill) !important; }

.sw-s { box-shadow: 0 .125rem .25rem rgba(0,0,0,.075) !important; }
.sw0 { box-shadow: none !important; }

/* ============================================================
   BUTTONS
   ============================================================ */
.bt {
  display: inline-block; font-weight: 400; text-align: center; vertical-align: middle;
  cursor: pointer; user-select: none; border: var(--bs-border-width) solid transparent;
  padding: .375rem .75rem; font-size: 1rem; line-height: 1.5;
  border-radius: var(--bs-border-radius); transition: var(--bs-transition);
  text-decoration: none; color: var(--bs-body-color); background-color: transparent;
}
.bt:focus-visible { outline: 0; box-shadow: var(--bs-focus-ring); }
.bt:disabled, .bt.off { pointer-events: none; opacity: .65; }
.bt-s { padding: .25rem .5rem; font-size: .875rem; border-radius: var(--bs-border-radius-sm); }
.btg { display: inline-flex; vertical-align: middle; }
.btg > .bt { border-radius: 0; }
.btg > .bt:first-child { border-top-left-radius: var(--bs-border-radius); border-bottom-left-radius: var(--bs-border-radius); }
.btg > .bt:last-child { border-top-right-radius: var(--bs-border-radius); border-bottom-right-radius: var(--bs-border-radius); }
.btg-s > .bt { padding: .25rem .5rem; font-size: .875rem; }

/* solid variants */
.bt-p { background-color: var(--bs-primary); border-color: var(--bs-primary); color: #fff; }
.bt-p:hover { background-color: #0b5ed7; border-color: #0a58ca; color: #fff; }
.bt-s2 { background-color: var(--bs-secondary); border-color: var(--bs-secondary); color: #fff; }
.bt-s2:hover { background-color: #5c636a; border-color: #565e64; color: #fff; }
.bt-ok { background-color: var(--bs-success); border-color: var(--bs-success); color: #fff; }
.bt-ok:hover { background-color: #157347; border-color: #146c43; color: #fff; }
.bt-er { background-color: var(--bs-danger); border-color: var(--bs-danger); color: #fff; }
.bt-er:hover { background-color: #bb2d3b; border-color: #b02a37; color: #fff; }
.bt-wn { background-color: var(--bs-warning); border-color: var(--bs-warning); color: #212529; }
.bt-wn:hover { background-color: #ffca2c; border-color: #ffc720; color: #212529; }
.bt-in { background-color: var(--bs-info); border-color: var(--bs-info); color: #212529; }
.bt-in:hover { background-color: #31d2f2; border-color: #25cff2; color: #212529; }
.bt-ln { color: var(--bs-primary); text-decoration: underline; border-color: transparent; background: none; }
.bt-ln:hover { color: #0a58ca; }

/* outline variants */
.bt-op { color: var(--bs-primary); border-color: var(--bs-primary); }
.bt-op:hover { background-color: var(--bs-primary); color: #fff; }
.bt-os { color: var(--bs-secondary); border-color: var(--bs-secondary); }
.bt-os:hover { background-color: var(--bs-secondary); color: #fff; }
.bt-ook { color: var(--bs-success); border-color: var(--bs-success); }
.bt-ook:hover { background-color: var(--bs-success); color: #fff; }
.bt-oer { color: var(--bs-danger); border-color: var(--bs-danger); }
.bt-oer:hover { background-color: var(--bs-danger); color: #fff; }
.bt-own { color: var(--bs-warning); border-color: var(--bs-warning); }
.bt-own:hover { background-color: var(--bs-warning); color: #212529; }
.bt-oin { color: var(--bs-info); border-color: var(--bs-info); }
.bt-oin:hover { background-color: var(--bs-info); color: #212529; }
.bt-olt { color: var(--bs-light); border-color: var(--bs-light); }
.bt-olt:hover { background-color: var(--bs-light); color: #212529; }

/* close button */
.bt-x {
  box-sizing: content-box; width: 1em; height: 1em; padding: .25em; color: #000;
  background: transparent url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23000'%3e%3cpath d='M.293.293a1 1 0 0 1 1.414 0L8 6.586 14.293.293a1 1 0 1 1 1.414 1.414L9.414 8l6.293 6.293a1 1 0 0 1-1.414 1.414L8 9.414l-6.293 6.293a1 1 0 0 1-1.414-1.414L6.586 8 .293 1.707a1 1 0 0 1 0-1.414z'/%3e%3c/svg%3e") center/1em auto no-repeat;
  border: 0; border-radius: var(--bs-border-radius-sm); opacity: .5; cursor: pointer;
}
.bt-x:hover { opacity: .75; }
.bt-xw { filter: invert(1) grayscale(100%) brightness(200%); }

/* ============================================================
   FORMS
   ============================================================ */
.fl { display: inline-block; margin-bottom: .5rem; }
.fl-s { font-size: .875rem; }
.ftx { display: block; margin-top: .25rem; font-size: .875em; color: var(--bs-secondary); }

.fc {
  display: block; width: 100%; padding: .375rem .75rem; font-size: 1rem; line-height: 1.5;
  color: var(--bs-body-color); background-color: var(--bs-body-bg);
  border: var(--bs-border-width) solid var(--bs-border-color); border-radius: var(--bs-border-radius);
  transition: border-color .15s ease-in-out, box-shadow .15s ease-in-out;
  appearance: none;
}
.fc:focus { border-color: #86b7fe; outline: 0; box-shadow: var(--bs-focus-ring); }
.fc:disabled { background-color: #e9ecef; opacity: 1; }
.fc-s { padding: .25rem .5rem; font-size: .875rem; border-radius: var(--bs-border-radius-sm); }

.fsl {
  display: block; width: 100%; padding: .375rem 2.25rem .375rem .75rem; font-size: 1rem;
  color: var(--bs-body-color); background-color: var(--bs-body-bg);
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 12'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
  background-repeat: no-repeat; background-position: right .75rem center; background-size: 16px 12px;
  border: var(--bs-border-width) solid var(--bs-border-color); border-radius: var(--bs-border-radius);
  appearance: none; transition: border-color .15s ease-in-out, box-shadow .15s ease-in-out;
}
.fsl:focus { border-color: #86b7fe; outline: 0; box-shadow: var(--bs-focus-ring); }
.fsl-s { padding: .25rem 2rem .25rem .5rem; font-size: .875rem; border-radius: var(--bs-border-radius-sm); }

.fch { display: block; min-height: 1.5rem; padding-left: 1.5em; margin-bottom: .125rem; }
.fch-i { float: left; width: 1em; height: 1em; margin-top: .25em; margin-left: -1.5em; vertical-align: top; appearance: none; border: var(--bs-border-width) solid var(--bs-border-color); border-radius: .25em; background-color: var(--bs-body-bg); transition: var(--bs-transition); }
.fch-i:checked { background-color: var(--bs-primary); border-color: var(--bs-primary); background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3e%3cpath fill='none' stroke='%23fff' stroke-linecap='round' stroke-linejoin='round' stroke-width='3' d='m6 10 3 3 6-6'/%3e%3c/svg%3e"); background-repeat: no-repeat; background-position: center; background-size: contain; }
.fch-i:focus-visible { outline: 0; box-shadow: var(--bs-focus-ring); }
.fch-l { cursor: pointer; }
.fsw { padding-left: 2.5em; }
.fsw .fch-i { width: 2em; border-radius: 2em; background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='rgba(0,0,0,.25)'/%3e%3c/svg%3e"); background-position: left center; }
.fsw .fch-i:checked { background-position: right center; background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='%23fff'/%3e%3c/svg%3e"); }

.ig { display: flex; flex-wrap: wrap; align-items: stretch; width: 100%; position: relative; }
.ig > .fc, .ig > .fsl { flex: 1 1 auto; width: 1%; min-width: 0; position: relative; }
.ig-t { display: flex; align-items: center; padding: .375rem .75rem; font-size: 1rem; color: var(--bs-body-color); background-color: #e9ecef; border: var(--bs-border-width) solid var(--bs-border-color); border-radius: var(--bs-border-radius); white-space: nowrap; }
.ig > :not(:first-child) { margin-left: calc(-1 * var(--bs-border-width)); border-top-left-radius: 0; border-bottom-left-radius: 0; }
.ig > :not(:last-child) { border-top-right-radius: 0; border-bottom-right-radius: 0; }
.ig-s > .fc, .ig-s > .fsl, .ig-s > .ig-t { padding: .25rem .5rem; font-size: .875rem; border-radius: var(--bs-border-radius-sm); }

/* validation */
.err, .val :invalid { border-color: var(--bs-danger) !important; }
.err:focus, .val :invalid:focus { box-shadow: 0 0 0 .25rem rgba(var(--bs-danger-rgb), .25); }
.inv { display: none; width: 100%; margin-top: .25rem; font-size: .875em; color: var(--bs-danger); }
.err ~ .inv, .val :invalid ~ .inv { display: block; }

/* ============================================================
   TABLES
   ============================================================ */
.tb { width: 100%; margin-bottom: 1rem; vertical-align: top; border-color: var(--bs-border-color); }
.tb > :not(caption) > * > * { padding: .5rem; border-bottom-width: var(--bs-border-width); border-bottom-style: solid; border-bottom-color: inherit; }
.tb > thead { vertical-align: bottom; }
.tb-s > :not(caption) > * > * { padding: .25rem; }
.tb-h > tbody > tr:hover > * { background-color: rgba(0,0,0,.075); }
.tb-st > tbody > tr:nth-of-type(odd) > * { background-color: rgba(0,0,0,.05); }
.tb-bo > :not(caption) > * > * { border-width: var(--bs-border-width); }
.tb-bo > :not(caption) > * { border-top-width: var(--bs-border-width); }
.tb-r { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.tb-dk { color: #fff; background-color: var(--bs-dark); border-color: #4d5154; }
.tb-lt { background-color: var(--bs-light); }
.tb-p { background-color: rgba(var(--bs-primary-rgb), .1); }
.tb-wn { background-color: rgba(var(--bs-warning-rgb), .1); }

/* ============================================================
   CARDS
   ============================================================ */
.cd { position: relative; display: flex; flex-direction: column; min-width: 0; word-wrap: break-word; background-color: var(--bs-body-bg); border: var(--bs-border-width) solid var(--bs-border-color); border-radius: var(--bs-border-radius); }
.cd-b { flex: 1 1 auto; padding: 1rem; }
.cd-h { padding: .5rem 1rem; margin-bottom: 0; background-color: rgba(0,0,0,.03); border-bottom: var(--bs-border-width) solid var(--bs-border-color); }
.cd-h:first-child { border-radius: calc(var(--bs-border-radius) - var(--bs-border-width)) calc(var(--bs-border-radius) - var(--bs-border-width)) 0 0; }
.cd-t { margin-bottom: .5rem; }
.cd-tx:last-child { margin-bottom: 0; }

/* ============================================================
   LIST GROUPS
   ============================================================ */
.lg { display: flex; flex-direction: column; padding-left: 0; margin-bottom: 0; border-radius: var(--bs-border-radius); }
.lg-i { position: relative; display: block; padding: .5rem 1rem; color: var(--bs-body-color); background-color: var(--bs-body-bg); border: var(--bs-border-width) solid var(--bs-border-color); }
.lg-i:first-child { border-top-left-radius: inherit; border-top-right-radius: inherit; }
.lg-i:last-child { border-bottom-left-radius: inherit; border-bottom-right-radius: inherit; }
.lg-i + .lg-i { border-top-width: 0; }
.lg-ia { width: 100%; cursor: pointer; text-align: inherit; }
.lg-ia:hover, .lg-ia:focus { z-index: 1; color: var(--bs-body-color); background-color: #f8f9fa; }
.lg-fl { border-radius: 0; }
.lg-fl > .lg-i { border-width: 0 0 var(--bs-border-width); }
.lg-fl > .lg-i:last-child { border-bottom-width: 0; }
.lg-ilt { color: #636464; background-color: #fefefe; }
.lg-iwn { color: #664d03; background-color: #fff3cd; }

/* ============================================================
   BADGES
   ============================================================ */
.bd { display: inline-block; padding: .35em .65em; font-size: .75em; font-weight: 700; line-height: 1; text-align: center; white-space: nowrap; vertical-align: baseline; border-radius: var(--bs-border-radius-pill); color: #fff; }

/* ============================================================
   NAVIGATION / NAVBAR / BREADCRUMBS / DROPDOWNS
   ============================================================ */
.nb { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; padding: .5rem 1rem; position: relative; }
.nb-dk { color: rgba(255,255,255,.55); }
.nb-dk .nl { color: rgba(255,255,255,.55); }
.nb-dk .nl:hover, .nb-dk .nl.act { color: #fff; }

.ni { list-style: none; }
.nl { display: block; padding: .5rem 1rem; color: var(--bs-primary); text-decoration: none; transition: color .15s ease-in-out; }
.nl:hover { color: #0a58ca; }
.nl:focus-visible { outline: 0; box-shadow: var(--bs-focus-ring); }

.bc { display: flex; flex-wrap: wrap; padding: 0; margin-bottom: 1rem; list-style: none; }
.bc-i + .bc-i::before { content: "/"; padding: 0 .5rem; color: var(--bs-secondary); }
.bc-i.act { color: var(--bs-secondary); }

.dd { position: relative; }
.dd-t::after { display: inline-block; margin-left: .255em; vertical-align: .255em; content: ""; border-top: .3em solid; border-right: .3em solid transparent; border-left: .3em solid transparent; }
.dd-m { position: absolute; z-index: 1000; display: none; min-width: 10rem; padding: .5rem 0; background-color: var(--bs-body-bg); border: var(--bs-border-width) solid var(--bs-border-color); border-radius: var(--bs-border-radius); box-shadow: 0 .5rem 1rem rgba(0,0,0,.15); }
.dd-m.on { display: block; }
.dd-md { background-color: #343a40; border-color: rgba(255,255,255,.15); }
.dd-md .dd-i { color: #dee2e6; }
.dd-md .dd-i:hover { background-color: rgba(255,255,255,.15); color: #fff; }
.dd-i { display: block; width: 100%; padding: .25rem 1rem; clear: both; color: var(--bs-body-color); text-decoration: none; white-space: nowrap; background: none; border: 0; cursor: pointer; }
.dd-i:hover, .dd-i:focus { background-color: #e9ecef; }
.dd-i:focus-visible { outline: 0; box-shadow: var(--bs-focus-ring); }

/* ============================================================
   MODALS
   ============================================================ */
.mo { position: fixed; top: 0; left: 0; z-index: 1055; display: none; width: 100%; height: 100%; overflow-x: hidden; overflow-y: auto; outline: 0; background-color: rgba(0,0,0,.5); }
.mo.on { display: block; }
.mo-d { position: relative; width: auto; margin: 1.75rem auto; max-width: 500px; pointer-events: none; }
.mo-dc { display: flex; align-items: center; min-height: calc(100% - 3.5rem); }
.mo-ds { max-height: calc(100% - 3.5rem); }
.mo-ds .mo-c { overflow: hidden; }
.mo-ds .mo-b { overflow-y: auto; }
.mo-s { max-width: 300px; }
.mo-l { max-width: 800px; }
.mo-c { position: relative; display: flex; flex-direction: column; width: 100%; pointer-events: auto; background-color: var(--bs-body-bg); border: var(--bs-border-width) solid rgba(0,0,0,.2); border-radius: var(--bs-border-radius-lg); box-shadow: 0 .5rem 1rem rgba(0,0,0,.15); outline: 0; }
.mo-h { display: flex; flex-shrink: 0; align-items: center; justify-content: space-between; padding: 1rem; border-bottom: var(--bs-border-width) solid var(--bs-border-color); }
.mo-t { margin-bottom: 0; line-height: 1.5; }
.mo-b { position: relative; flex: 1 1 auto; padding: 1rem; }
.mo-f { display: flex; flex-shrink: 0; flex-wrap: wrap; align-items: center; justify-content: flex-end; padding: .75rem; border-top: var(--bs-border-width) solid var(--bs-border-color); gap: .5rem; }

/* ============================================================
   ALERTS
   ============================================================ */
.al { position: relative; padding: 1rem; margin-bottom: 1rem; border: var(--bs-border-width) solid transparent; border-radius: var(--bs-border-radius); }
.al-hd { color: inherit; }
.al-in { color: #055160; background-color: #cff4fc; border-color: #b6effb; }
.al-ok { color: #0f5132; background-color: #d1e7dd; border-color: #badbcc; }
.al-wn { color: #664d03; background-color: #fff3cd; border-color: #ffecb5; }
.al-er { color: #842029; background-color: #f8d7da; border-color: #f5c2c7; }

/* ============================================================
   SPINNERS / PROGRESS / TOASTS
   ============================================================ */
@keyframes spinner-border-anim { to { transform: rotate(360deg); } }
@keyframes spinner-grow-anim { 0% { transform: scale(0); } 50% { opacity: 1; transform: none; } }

.sp { display: inline-block; width: 2rem; height: 2rem; vertical-align: -.125em; border: .25em solid currentcolor; border-right-color: transparent; border-radius: 50%; animation: spinner-border-anim .75s linear infinite; }
.sp-s { width: 1rem; height: 1rem; border-width: .2em; }
.spg { display: inline-block; width: 2rem; height: 2rem; vertical-align: -.125em; background-color: currentcolor; border-radius: 50%; opacity: 0; animation: spinner-grow-anim .75s linear infinite; }
.spg-s { width: 1rem; height: 1rem; }

.pg { display: flex; height: 1rem; overflow: hidden; font-size: .75rem; background-color: #e9ecef; border-radius: var(--bs-border-radius); }
.pg-b { display: flex; flex-direction: column; justify-content: center; overflow: hidden; color: #fff; text-align: center; white-space: nowrap; background-color: var(--bs-primary); transition: width .6s ease; }

/* ============================================================
   TOASTS (CSS-only with auto-dismiss)
   ============================================================ */
@keyframes toast-slide-in { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes toast-slide-in-left { from { transform: translateX(-100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes toast-fade-out { 0% { opacity: 1; } 80% { opacity: 1; } 100% { opacity: 0; pointer-events: none; } }
@keyframes toast-auto-dismiss { 0% { opacity: 1; max-height: 200px; margin-bottom: .5rem; padding: .75rem 1rem; } 80% { opacity: 1; } 95% { opacity: 0; max-height: 200px; } 100% { opacity: 0; max-height: 0; margin-bottom: 0; padding: 0 1rem; overflow: hidden; pointer-events: none; } }

.to-box {
  position: fixed; z-index: 1090; display: flex; flex-direction: column; gap: .5rem;
  pointer-events: none; padding: 1rem; max-width: 380px; width: 100%;
}
.to-box > * { pointer-events: auto; }

/* position variants */
.to-tr    { top: 0; right: 0; }
.to-tl     { top: 0; left: 0; }
.to-br { bottom: 0; right: 0; flex-direction: column-reverse; }
.to-bl  { bottom: 0; left: 0; flex-direction: column-reverse; }
.to-tc   { top: 0; left: 50%; transform: translateX(-50%); align-items: center; }
.to-bc { bottom: 0; left: 50%; transform: translateX(-50%); align-items: center; flex-direction: column-reverse; }

.to {
  width: 350px; max-width: 100%; font-size: .875rem;
  background-color: var(--bs-body-bg); color: var(--bs-body-color);
  border: var(--bs-border-width) solid var(--bs-border-color);
  border-radius: var(--bs-border-radius); box-shadow: 0 .5rem 1rem rgba(0,0,0,.15);
  overflow: hidden;
  animation: toast-slide-in .3s ease-out;
}
.to-tl .to, .to-bl .to { animation-name: toast-slide-in-left; }

.to-h {
  display: flex; align-items: center; padding: .5rem .75rem;
  border-bottom: var(--bs-border-width) solid var(--bs-border-color);
  font-size: .8125rem;
}
.to-h .to-t { font-weight: 600; margin-right: auto; }
.to-h .to-tm { font-size: .75rem; color: var(--bs-secondary); margin-left: .5rem; }
.to-h .bt-x { margin-left: .5rem; }

.to-b { padding: .75rem 1rem; word-wrap: break-word; }

/* colour variants */
.to-ok { border-left: 4px solid var(--bs-success); }
.to-ok .to-h { color: var(--bs-success); }
.to-er  { border-left: 4px solid var(--bs-danger); }
.to-er  .to-h { color: var(--bs-danger); }
.to-wn { border-left: 4px solid var(--bs-warning); }
.to-wn .to-h { color: #664d03; }
.to-in    { border-left: 4px solid var(--bs-info); }
.to-in    .to-h { color: #055160; }

/* auto-dismiss: toast disappears after duration (default 5s, override with animation-duration) */
.to-au {
  animation: toast-slide-in .3s ease-out, toast-auto-dismiss 5s ease-in .3s forwards;
}
.to-tl .to-au, .to-bl .to-au {
  animation: toast-slide-in-left .3s ease-out, toast-auto-dismiss 5s ease-in .3s forwards;
}

/* duration modifiers */
.to-3 { animation-duration: .3s, 3s; }
.to-5 { animation-duration: .3s, 5s; }
.to-8 { animation-duration: .3s, 8s; }
.to-10 { animation-duration: .3s, 10s; }

/* progress bar for auto-dismiss (optional visual countdown) */
.to-pg {
  height: 3px; background: currentColor; opacity: .3;
  animation: toast-progress-shrink 5s linear .3s forwards;
}
.to-3 .to-pg  { animation-duration: 3s; }
.to-5 .to-pg  { animation-duration: 5s; }
.to-8 .to-pg  { animation-duration: 8s; }
.to-10 .to-pg { animation-duration: 10s; }
@keyframes toast-progress-shrink { from { width: 100%; } to { width: 0%; } }

/* dark toast */
.to-dk { background-color: var(--bs-dark); color: rgba(255,255,255,.85); border-color: rgba(255,255,255,.1); }
.to-dk .to-h { border-color: rgba(255,255,255,.1); color: rgba(255,255,255,.7); }
.to-dk .to-tm { color: rgba(255,255,255,.4); }

/* ============================================================
   PAGINATION
   ============================================================ */
.pn { display: flex; padding-left: 0; list-style: none; }
.pn-s .pn-l { padding: .25rem .5rem; font-size: .875rem; }
.pn-i:first-child .pn-l { border-top-left-radius: var(--bs-border-radius); border-bottom-left-radius: var(--bs-border-radius); }
.pn-i:last-child .pn-l { border-top-right-radius: var(--bs-border-radius); border-bottom-right-radius: var(--bs-border-radius); }
.pn-l { position: relative; display: block; padding: .375rem .75rem; color: var(--bs-primary); text-decoration: none; background-color: var(--bs-body-bg); border: var(--bs-border-width) solid var(--bs-border-color); transition: var(--bs-transition); }
.pn-l:hover { z-index: 2; color: #0a58ca; background-color: #e9ecef; border-color: #dee2e6; }
.pn-l:focus-visible { z-index: 3; outline: 0; box-shadow: var(--bs-focus-ring); }

/* ============================================================
   POSITIONING / MISC UTILITIES
   ============================================================ */
.pa { position: absolute !important; }
.pf { position: fixed !important; }
.t0 { top: 0 !important; }
.e0 { right: 0 !important; }
.s100 { left: 100% !important; }
.trm { transform: translate(-50%, -50%) !important; }

.w1 { width: 100% !important; }
.wa { width: auto !important; }
.h1 { height: 100% !important; }
.oa { overflow: auto !important; }
.op5 { opacity: .5 !important; }

.sr { position: absolute !important; width: 1px !important; height: 1px !important; padding: 0 !important; margin: -1px !important; overflow: hidden !important; clip: rect(0,0,0,0) !important; white-space: nowrap !important; border: 0 !important; }

.ith { padding: .25rem; background-color: var(--bs-body-bg); border: var(--bs-border-width) solid var(--bs-border-color); border-radius: var(--bs-border-radius); max-width: 100%; height: auto; }
.vam { vertical-align: middle !important; }

/* state classes */
.fde { opacity: 0; transition: opacity .15s linear; }
.fde.on { opacity: 1; }
.on:not(.fde) { display: block; }
.clp { display: none; }
.clp.on { display: block; }
.act { font-weight: 600; }
.off { pointer-events: none; opacity: .65; }

/* ============================================================
   USER CARD (hover popup)
   ============================================================ */
/* ============================================================
   TREEVIEW (m-tree)
   ============================================================ */
/* ============================================================
   TABLE BINDING (m-table)
   ============================================================ */
/* ============================================================
   GANTT CHART (m-gantt)
   ============================================================ */
/* ============================================================
   CALENDAR (m-calendar)
   ============================================================ */
.bm-calendar { border: 1px solid var(--bs-gray-200, #e9ecef); border-radius: var(--bs-border-radius, .25rem); overflow: hidden; font-size: .875rem; user-select: none; }
.bm-cal-header { display: flex; align-items: center; justify-content: space-between; padding: .5rem .75rem; background: var(--bs-primary, #0d6efd); color: #fff; font-weight: 600; }
.bm-cal-nav { background: none; border: none; color: #fff; font-size: 1rem; cursor: pointer; padding: .25rem .5rem; border-radius: .25rem; }
.bm-cal-nav:hover { background: rgba(255,255,255,.2); }
.bm-cal-title { font-size: 1rem; }
.bm-cal-row { display: grid; grid-template-columns: repeat(7, 1fr); }
.bm-cal-dow-cell { text-align: center; padding: .375rem 0; font-weight: 600; color: var(--bs-gray-600, #6c757d); background: var(--bs-gray-100, #f8f9fa); font-size: .75rem; }
.bm-cal-cell { min-height: 3.5rem; padding: .25rem; border-bottom: 1px solid var(--bs-gray-100, #f8f9fa); border-right: 1px solid var(--bs-gray-100, #f8f9fa); position: relative; }
.bm-cal-empty { background: var(--bs-gray-50, #fafafa); }
.bm-cal-day { cursor: pointer; transition: background .15s; }
.bm-cal-day:hover { background: var(--bs-gray-100, #f8f9fa); }
.bm-cal-today { background: rgba(13,110,253,.08); }
.bm-cal-today .bm-cal-num { color: var(--bs-primary, #0d6efd); font-weight: 700; }
.bm-cal-selected { background: rgba(13,110,253,.15) !important; outline: 2px solid var(--bs-primary, #0d6efd); outline-offset: -2px; }
.bm-cal-num { font-size: .8rem; font-weight: 500; color: var(--bs-gray-700, #495057); }
.bm-cal-dots { display: flex; gap: 3px; margin-top: 2px; flex-wrap: wrap; align-items: center; }
.bm-cal-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--bs-primary, #0d6efd); display: inline-block; }
.bm-cal-more { font-size: .65rem; color: var(--bs-gray-500, #adb5bd); }

/* Dark variant */
.bm-calendar-dark { background: var(--bs-gray-900, #212529); border-color: var(--bs-gray-700, #495057); }
.bm-calendar-dark .bm-cal-dow-cell { background: var(--bs-gray-800, #343a40); color: var(--bs-gray-400, #ced4da); }
.bm-calendar-dark .bm-cal-cell { border-color: var(--bs-gray-800, #343a40); }
.bm-calendar-dark .bm-cal-day:hover { background: var(--bs-gray-800, #343a40); }
.bm-calendar-dark .bm-cal-num { color: var(--bs-gray-300, #dee2e6); }
.bm-calendar-dark .bm-cal-empty { background: var(--bs-gray-900, #212529); }

/* ============================================================
   CHATBOT (m-chatbot)
   ============================================================ */
.bm-chat { display: flex; flex-direction: column; border: 1px solid var(--bs-gray-200, #e9ecef); border-radius: var(--bs-border-radius, .25rem); overflow: hidden; height: 400px; font-size: .875rem; }
.bm-chat-log { flex: 1; overflow-y: auto; padding: .75rem; display: flex; flex-direction: column; gap: .5rem; background: var(--bs-gray-50, #fafafa); }
.bm-chat-bubble { display: flex; gap: .5rem; max-width: 80%; animation: bm-chat-in .2s ease-out; }
.bm-chat-user { align-self: flex-end; flex-direction: row-reverse; }
.bm-chat-bot { align-self: flex-start; }
.bm-chat-avatar { font-size: 1.5rem; line-height: 1; flex-shrink: 0; }
.bm-chat-body { padding: .5rem .75rem; border-radius: .75rem; line-height: 1.4; }
.bm-chat-user .bm-chat-body { background: var(--bs-primary, #0d6efd); color: #fff; border-bottom-right-radius: .2rem; }
.bm-chat-bot .bm-chat-body { background: var(--bs-gray-200, #e9ecef); color: var(--bs-gray-800, #343a40); border-bottom-left-radius: .2rem; }
.bm-chat-name { font-weight: 600; font-size: .75rem; margin-bottom: .15rem; }
.bm-chat-time { font-size: .7rem; opacity: .65; margin-top: .2rem; }
.bm-chat-text { word-break: break-word; }
.bm-chat-input { display: flex; border-top: 1px solid var(--bs-gray-200, #e9ecef); }
.bm-chat-field { flex: 1; border: none; padding: .625rem .75rem; font-size: .875rem; outline: none; }
.bm-chat-send { border: none; background: var(--bs-primary, #0d6efd); color: #fff; padding: .625rem 1rem; font-size: 1rem; cursor: pointer; transition: background .15s; }
.bm-chat-send:hover { background: var(--bs-primary-dark, #0b5ed7); }
@keyframes bm-chat-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* Dark variant */
.bm-chat-dark { border-color: var(--bs-gray-700, #495057); }
.bm-chat-dark .bm-chat-log { background: var(--bs-gray-900, #212529); }
.bm-chat-dark .bm-chat-bot .bm-chat-body { background: var(--bs-gray-700, #495057); color: var(--bs-gray-100, #f8f9fa); }
.bm-chat-dark .bm-chat-field { background: var(--bs-gray-800, #343a40); color: var(--bs-gray-100, #f8f9fa); }
.bm-chat-dark .bm-chat-input { border-color: var(--bs-gray-700, #495057); }

/* ============================================================
   GANTT CHART (m-gantt)
   ============================================================ */
.bm-gantt { overflow-x: auto; border: 1px solid var(--bs-gray-200, #e9ecef); border-radius: var(--bs-border-radius, .25rem); background: #fff; }
.bm-gantt svg { display: block; min-width: 100%; }
.bm-gantt-dark { background: var(--bs-gray-900, #212529); border-color: var(--bs-gray-700, #495057); }

/* ============================================================
   TABLE BINDING (m-table)
   ============================================================ */
.bm-table { width: 100%; border-collapse: collapse; font-size: .875rem; }
.bm-table thead { border-bottom: 2px solid var(--bs-gray-300, #dee2e6); }
.bm-table .bm-table-th {
  padding: .5rem .75rem; text-align: left; font-weight: 600;
  color: var(--bs-gray-700, #495057); white-space: nowrap;
}
.bm-table .bm-table-th:hover { color: var(--bs-gray-900, #212529); }
.bm-table tbody td { padding: .5rem .75rem; border-bottom: 1px solid var(--bs-gray-200, #e9ecef); }
.bm-table .bm-table-row { transition: background-color .15s; cursor: pointer; }
.bm-table .bm-table-row:hover { background: var(--bs-gray-100, #f8f9fa); }
.bm-table .bm-table-selected { background: var(--bs-primary, #0d6efd) !important; color: #fff; }
.bm-table .bm-table-selected td { color: #fff; }

/* Striped variant */
.bm-table-striped tbody tr:nth-child(even) { background: var(--bs-gray-100, #f8f9fa); }
.bm-table-striped .bm-table-row:hover { background: var(--bs-gray-200, #e9ecef); }

/* Dark variant */
.bm-table-dark { color: var(--bs-gray-200, #e9ecef); }
.bm-table-dark thead { border-bottom-color: var(--bs-gray-600, #6c757d); }
.bm-table-dark .bm-table-th { color: var(--bs-gray-300, #dee2e6); }
.bm-table-dark tbody td { border-bottom-color: rgba(255,255,255,.1); }
.bm-table-dark .bm-table-row:hover { background: rgba(255,255,255,.08); }

/* ============================================================
   TREEVIEW (m-tree)
   ============================================================ */
.bm-tree { font-family: var(--bs-font-sans-serif, system-ui, sans-serif); font-size: .875rem; user-select: none; }
.bm-tree-node { }
.bm-tree-row {
  display: flex; align-items: center; gap: .35rem; padding: .25rem .5rem;
  cursor: pointer; border-radius: var(--bs-border-radius, .25rem);
  transition: background-color .15s;
}
.bm-tree-row:hover { background: var(--bs-gray-200, #e9ecef); }
.bm-tree-selected { background: var(--bs-primary, #0d6efd) !important; color: #fff; }
.bm-tree-selected .bm-tree-icon,
.bm-tree-selected .bm-tree-toggle { color: #fff; }
.bm-tree-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 1rem; flex-shrink: 0; color: var(--bs-gray-600, #6c757d);
  font-size: .75rem; cursor: pointer; transition: transform .15s;
}
.bm-tree-spacer { display: inline-block; width: 1rem; flex-shrink: 0; }
.bm-tree-icon { flex-shrink: 0; font-size: 1rem; line-height: 1; }
.bm-tree-label { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bm-tree-children { /* animated collapse could be added here */ }

/* Dark variant */
.bm-tree-dark .bm-tree-row:hover { background: rgba(255,255,255,.1); }
.bm-tree-dark .bm-tree-selected { background: var(--bs-primary, #0d6efd) !important; }
.bm-tree-dark .bm-tree-toggle { color: var(--bs-gray-400, #ced4da); }
.bm-tree-dark { color: var(--bs-gray-200, #e9ecef); }

/* ============================================================
   USER CARD (hover popup)
   ============================================================ */
.uc-trg { position: relative; display: inline-block; cursor: pointer; }
.uc-trg .ua {
  width: 2rem; height: 2rem; border-radius: 50%; object-fit: cover; vertical-align: middle;
  border: 2px solid var(--bs-border-color); transition: var(--bs-transition);
}
.uc-trg:hover .ua { border-color: var(--bs-primary); box-shadow: var(--bs-focus-ring); }

.uc {
  position: absolute; z-index: 1060; top: calc(100% + .5rem); left: 50%; transform: translateX(-50%) translateY(4px);
  width: 280px; padding: 0;
  background-color: var(--bs-body-bg); border: var(--bs-border-width) solid var(--bs-border-color);
  border-radius: var(--bs-border-radius-lg); box-shadow: 0 .5rem 1.5rem rgba(0,0,0,.15);
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity .2s ease, visibility .2s ease, transform .2s ease;
}
.uc-trg:hover .uc {
  opacity: 1; visibility: visible; pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
/* arrow */
.uc::before {
  content: ""; position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%);
  border: 8px solid transparent; border-bottom-color: var(--bs-border-color);
}
.uc::after {
  content: ""; position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%);
  border: 7px solid transparent; border-bottom-color: var(--bs-body-bg);
}

.uc-h {
  display: flex; align-items: center; gap: var(--sp-2);
  padding: var(--sp-3); border-bottom: var(--bs-border-width) solid var(--bs-border-color);
}
.uc-h .ua-l { width: 3rem; height: 3rem; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.uc-h .un { font-weight: 600; font-size: 1rem; line-height: 1.2; }
.uc-h .ur { font-size: .75rem; color: var(--bs-secondary); }

.uc-b { padding: var(--sp-2) var(--sp-3); font-size: .8125rem; }
.uc-b .ud { display: flex; align-items: center; gap: var(--sp-2); padding: var(--sp-1) 0; color: var(--bs-body-color); }
.uc-b .ud-l { color: var(--bs-secondary); min-width: 4rem; }

.uc-f {
  display: flex; gap: var(--sp-2); padding: var(--sp-2) var(--sp-3);
  border-top: var(--bs-border-width) solid var(--bs-border-color);
}

/* placement variants */
.uc-r { left: auto; right: 0; transform: translateY(4px); }
.uc-trg:hover .uc-r { transform: translateY(0); }
.uc-r::before, .uc-r::after { left: auto; right: 1rem; transform: none; }

.uc-l { left: 0; transform: translateX(0) translateY(4px); }
.uc-trg:hover .uc-l { transform: translateX(0) translateY(0); }
.uc-l::before, .uc-l::after { left: 1rem; transform: none; }

/* dark variant */
.uc-dk { background-color: var(--bs-dark); border-color: rgba(255,255,255,.15); color: rgba(255,255,255,.85); }
.uc-dk::after { border-bottom-color: var(--bs-dark); }
.uc-dk .uc-h { border-color: rgba(255,255,255,.1); }
.uc-dk .uc-f { border-color: rgba(255,255,255,.1); }
.uc-dk .ur, .uc-dk .ud-l { color: rgba(255,255,255,.5); }

/* ============================================================
   VIEWPORT / FLUID SCALING
   ============================================================ */
.vh-100 { height: 100vh !important; }
.vw-100 { width: 100vw !important; }
.mvh { min-height: 100vh !important; }
.mvw { min-width: 100vw !important; }
.xvh { max-height: 100vh !important; }

/* dynamic viewport units (modern browsers) */
.mdvh { min-height: 100dvh !important; }
.dvh { height: 100dvh !important; }

/* fluid typography — scales between 1rem (320px) and 1.25rem (1200px) */
.ft { font-size: clamp(1rem, 0.909rem + 0.45vw, 1.25rem); }
.ft-l { font-size: clamp(1.25rem, 1rem + 1.25vw, 2rem); }
.ft-x { font-size: clamp(2rem, 1.5rem + 2.5vw, 3.5rem); }

/* sticky top/bottom helpers */
.skt { position: sticky; top: 0; z-index: 1020; }
.skb { position: sticky; bottom: 0; z-index: 1020; }

/* full-height page layout — letterbox mode: fixed header + footer, scrollable main */
.pw { display: flex; flex-direction: column; height: 100vh; height: 100dvh; overflow: hidden; }
.pw > main, .pw > .mc { flex: 1 1 auto; overflow-y: auto; }
.pw > .sh, .pw > .sf { flex-shrink: 0; }

/* when main contains a sidebar, make it a horizontal flex row */
.pw > .pb { display: flex; flex: 1 1 auto; overflow: hidden; min-height: 0; }
.pw > .pb > main, .pw > .pb > .mc { flex: 1 1 auto; overflow-y: auto; }

/* ============================================================
   SIDEBAR
   ============================================================ */
.ss {
  flex: 0 0 auto;
  width: 250px;
  overflow-y: auto;
  padding: var(--sp-3);
  background-color: var(--bs-body-bg);
  font-size: .875rem;
}
.site-sidebar-left { border-right: var(--bs-border-width) solid var(--bs-border-color); border-left: 0; }
.site-sidebar-right { border-right: 0; border-left: var(--bs-border-width) solid var(--bs-border-color); order: 1; }

.ss nav { display: flex; flex-direction: column; gap: var(--sp-1); }
.ss nav a {
  display: block;
  padding: var(--sp-1) var(--sp-2);
  color: var(--bs-body-color);
  text-decoration: none;
  border-radius: var(--bs-border-radius-sm);
  transition: var(--bs-transition);
}
.ss nav a:hover { background-color: rgba(0,0,0,.05); color: var(--bs-primary); }
.ss nav a.act { background-color: rgba(var(--bs-primary-rgb), .1); color: var(--bs-primary); font-weight: 600; }
.ss nav a:focus-visible { outline: 0; box-shadow: var(--bs-focus-ring); }

.ss .ss-hd {
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--bs-secondary);
  padding: var(--sp-2) var(--sp-2) var(--sp-1);
}

.ss-dk {
  background-color: var(--bs-dark);
  border-color: rgba(255,255,255,.1);
  color: rgba(255,255,255,.7);
}
.ss-dk nav a { color: rgba(255,255,255,.7); }
.ss-dk nav a:hover { background-color: rgba(255,255,255,.1); color: #fff; }
.ss-dk nav a.act { background-color: rgba(255,255,255,.15); color: #fff; }
.ss-dk .ss-hd { color: rgba(255,255,255,.4); }

/* collapse sidebar on small screens */
@media (max-width: 767.98px) {
  .ss { display: none; }
  .ss.on { display: block; position: absolute; z-index: 1040; height: 100%; box-shadow: 0 .5rem 1rem rgba(0,0,0,.15); }
}

/* stacked sidebars — remove duplicate borders between adjacent ones */
.ss + .ss { border-left: 0; }

/* ============================================================
   SITE HEADER
   ============================================================ */
.sh {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-2) var(--sp-3);
  border-bottom: var(--bs-border-width) solid var(--bs-border-color);
  background-color: var(--bs-body-bg);
  z-index: 1030;
}
.sh .br {
  font-size: 1.25rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--bs-body-color);
  margin-right: auto;
}
.sh .br:hover { color: var(--bs-primary); }
.sh nav { display: flex; align-items: center; gap: var(--sp-2); flex-wrap: wrap; }
.sh nav a {
  padding: var(--sp-1) var(--sp-2);
  color: var(--bs-body-color);
  text-decoration: none;
  border-radius: var(--bs-border-radius-sm);
  font-size: .875rem;
  transition: var(--bs-transition);
}
.sh nav a:hover { background-color: rgba(0,0,0,.05); color: var(--bs-primary); }
.sh nav a.act { font-weight: 600; color: var(--bs-primary); }
.sh nav a:focus-visible { outline: 0; box-shadow: var(--bs-focus-ring); }

.sh-dk {
  background-color: var(--bs-dark);
  border-color: rgba(255,255,255,.1);
}
.sh-dk .br { color: #fff; }
.sh-dk .br:hover { color: var(--bs-info); }
.sh-dk nav a { color: rgba(255,255,255,.7); }
.sh-dk nav a:hover { background-color: rgba(255,255,255,.1); color: #fff; }
.sh-dk nav a.act { color: #fff; }

/* ============================================================
   SITE FOOTER
   ============================================================ */
.sf {
  padding: var(--sp-3) var(--sp-3);
  border-top: var(--bs-border-width) solid var(--bs-border-color);
  font-size: .875rem;
  color: var(--bs-secondary);
  background-color: var(--bs-body-bg);
}
.sf a { color: var(--bs-secondary); text-decoration: none; }
.sf a:hover { color: var(--bs-primary); text-decoration: underline; }
.sf-dk {
  background-color: var(--bs-dark);
  color: rgba(255,255,255,.6);
  border-color: rgba(255,255,255,.1);
}
.sf-dk a { color: rgba(255,255,255,.6); }
.sf-dk a:hover { color: #fff; }