/* ---------------------------------------------------------------------
   EdTek Campus — warm dark theme
   Palette: warm near-black / dark grey base, brown-toned panels, a
   friendly orange accent. Layered on top of Bootstrap's
   data-bs-theme="dark", with clear contrast between page background
   and panels (cards, navbar, popups).
--------------------------------------------------------------------- */

:root,
[data-bs-theme="dark"] {
  --accent: #e0863f;
  --accent-rgb: 224, 134, 63;
  --accent-strong: #f0a05e;
  --panel-bg: #2b2318;
  --panel-bg-elevated: #342a1d;
  --panel-border: #52432e;
  --panel-border-soft: rgba(224, 134, 63, 0.22);

  --bs-body-bg: #1d170f;
  --bs-body-bg-rgb: 29, 23, 15;
  --bs-body-color: #ddd1c0;
  --bs-body-color-rgb: 221, 209, 192;
  --bs-emphasis-color: #f7ede0;
  --bs-secondary-color: #a99a86;
  --bs-secondary-bg: #2b2318;
  --bs-tertiary-bg: #342a1d;
  --bs-tertiary-color: #a99a86;
  --bs-border-color: var(--panel-border);
  --bs-border-color-translucent: var(--panel-border-soft);
  --bs-heading-color: #f7ede0;

  --bs-primary: var(--accent);
  --bs-primary-rgb: var(--accent-rgb);
  --bs-link-color: var(--accent-strong);
  --bs-link-color-rgb: 240, 160, 94;
  --bs-link-hover-color: #f7b877;
  --bs-link-hover-color-rgb: 247, 184, 119;

  --bs-card-bg: var(--panel-bg);
  --bs-card-border-color: var(--panel-border);

  --bs-focus-ring-color: rgba(var(--accent-rgb), 0.3);

  --bg-motifs:
    radial-gradient(circle at 8% -8%, rgba(224, 134, 63, 0.06), transparent 42%),
    radial-gradient(circle at 100% 105%, rgba(224, 134, 63, 0.05), transparent 42%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240' viewBox='0 0 240 240'%3E%3Cg fill='none' stroke='%23e0863f' stroke-width='1' opacity='0.09'%3E%3Cpath d='M0 50 H70 V120 H160 V190 H240'/%3E%3Cpath d='M240 70 H170 V140 H80 V210 H0'/%3E%3Cpath d='M120 0 V45'/%3E%3Cpath d='M120 195 V240'/%3E%3C/g%3E%3Cg fill='%23e0863f' opacity='0.16'%3E%3Ccircle cx='70' cy='50' r='2.6'/%3E%3Ccircle cx='160' cy='120' r='2.6'/%3E%3Ccircle cx='170' cy='70' r='2.6'/%3E%3Ccircle cx='80' cy='140' r='2.6'/%3E%3Ccircle cx='120' cy='45' r='2.6'/%3E%3Ccircle cx='120' cy='195' r='2.6'/%3E%3C/g%3E%3C/svg%3E"),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='560' height='560' viewBox='0 0 560 560'%3E%3Cg stroke='%23e0863f' stroke-width='1.1' fill='none' stroke-linecap='round' opacity='0.12'%3E%3Cg transform='translate(90,100)'%3E%3Ccircle r='13'/%3E%3Cline x1='13' y1='0' x2='20' y2='0'/%3E%3Ccircle cx='20' cy='0' r='2' fill='%23e0863f' stroke='none'/%3E%3Cline x1='6.5' y1='11.26' x2='10' y2='17.32'/%3E%3Ccircle cx='10' cy='17.32' r='2' fill='%23e0863f' stroke='none'/%3E%3Cline x1='-6.5' y1='11.26' x2='-10' y2='17.32'/%3E%3Ccircle cx='-10' cy='17.32' r='2' fill='%23e0863f' stroke='none'/%3E%3Cline x1='-13' y1='0' x2='-20' y2='0'/%3E%3Ccircle cx='-20' cy='0' r='2' fill='%23e0863f' stroke='none'/%3E%3Cline x1='-6.5' y1='-11.26' x2='-10' y2='-17.32'/%3E%3Ccircle cx='-10' cy='-17.32' r='2' fill='%23e0863f' stroke='none'/%3E%3Cline x1='6.5' y1='-11.26' x2='10' y2='-17.32'/%3E%3Ccircle cx='10' cy='-17.32' r='2' fill='%23e0863f' stroke='none'/%3E%3C/g%3E%3Cg transform='translate(420,150)'%3E%3Cline x1='0' y1='0' x2='38' y2='-16'/%3E%3Cline x1='0' y1='0' x2='38' y2='16'/%3E%3Cline x1='38' y1='-16' x2='74' y2='0'/%3E%3Cline x1='38' y1='16' x2='74' y2='0'/%3E%3Cline x1='0' y1='0' x2='18' y2='32'/%3E%3Cline x1='38' y1='16' x2='18' y2='32'/%3E%3Ccircle cx='0' cy='0' r='2.6' fill='%23e0863f' stroke='none'/%3E%3Ccircle cx='38' cy='-16' r='2.6' fill='%23e0863f' stroke='none'/%3E%3Ccircle cx='38' cy='16' r='2.6' fill='%23e0863f' stroke='none'/%3E%3Ccircle cx='74' cy='0' r='2.6' fill='%23e0863f' stroke='none'/%3E%3Ccircle cx='18' cy='32' r='2.6' fill='%23e0863f' stroke='none'/%3E%3C/g%3E%3Cg transform='translate(96,420)'%3E%3Crect x='0' y='0' width='76' height='48' rx='4'/%3E%3Ccircle cx='10' cy='10' r='1.8' fill='%23e0863f' stroke='none'/%3E%3Ccircle cx='18' cy='10' r='1.8' fill='%23e0863f' stroke='none'/%3E%3Ccircle cx='26' cy='10' r='1.8' fill='%23e0863f' stroke='none'/%3E%3Cline x1='8' y1='22' x2='58' y2='22'/%3E%3Cline x1='8' y1='31' x2='42' y2='31'/%3E%3Cline x1='8' y1='40' x2='52' y2='40'/%3E%3C/g%3E%3Cg transform='translate(420,440)'%3E%3Cpolyline points='12,0 0,12 12,24'/%3E%3Cpolyline points='28,0 40,12 28,24'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  --bg-motifs-size: auto, auto, 240px 240px, 560px 560px;
  --bg-motifs-pos: 0 0, 0 0, 0 0, 0 0;

}

* {
  scrollbar-color: rgba(var(--accent-rgb), 0.45) #1a1510;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: #1a1510;
}
::-webkit-scrollbar-thumb {
  background: rgba(var(--accent-rgb), 0.4);
  border-radius: 6px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(var(--accent-rgb), 0.65);
}

body {
  background-color: var(--bs-body-bg);
  min-height: 100vh;
}

/* Line-art motifs overlay, painted above the background video. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image: var(--bg-motifs);
  background-size: var(--bg-motifs-size);
  background-position: var(--bg-motifs-pos);
}

.bg-video {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
  opacity: 0.2;
}

/* Admins get the subtle line-art motifs but not the background video. */
body.role-admin .bg-video {
  display: none;
}

a {
  transition: color 0.15s ease;
}

/* ---------------------------------------------------------------------
   Navbar
--------------------------------------------------------------------- */

.navbar {
  background-color: #251e14 !important;
  border-bottom: 1px solid var(--panel-border);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
}

.navbar-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.2rem;
  color: #f7ede0 !important;
}

.brand-logo {
  height: 32px;
  width: auto;
  filter: invert(1) drop-shadow(0 1px 2px rgba(0, 0, 0, 0.6));
}

.navbar-toggler {
  border-color: var(--panel-border);
}
.navbar-toggler:focus {
  box-shadow: 0 0 0 0.2rem rgba(var(--accent-rgb), 0.25);
}

.navbar-nav .nav-link {
  position: relative;
  color: #c7b9a6;
  font-weight: 500;
  padding-block: 0.5rem;
  transition: color 0.15s ease;
}
.navbar-nav .nav-link::after {
  content: "";
  position: absolute;
  left: 0.5rem;
  right: 0.5rem;
  bottom: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.2s ease;
}
.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus,
.navbar-nav .nav-link.active {
  color: #f7ede0;
}
.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link:focus::after,
.navbar-nav .nav-link.active::after {
  transform: scaleX(1);
}

/* ---------------------------------------------------------------------
   Dropdowns
--------------------------------------------------------------------- */

.dropdown-menu {
  background-color: var(--panel-bg-elevated);
  border: 1px solid var(--panel-border);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.45);
  border-radius: 0.6rem;
  padding: 0.4rem;
  animation: panelFadeIn 0.15s ease;
}

@keyframes panelFadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.dropdown-item {
  border-radius: 0.4rem;
  transition: background-color 0.15s ease, color 0.15s ease;
}
.dropdown-item:hover,
.dropdown-item:focus {
  background-color: rgba(var(--accent-rgb), 0.16);
  color: #f7ede0;
}
.dropdown-divider {
  border-color: var(--panel-border);
}

/* ---------------------------------------------------------------------
   Buttons
--------------------------------------------------------------------- */

.btn {
  border-radius: 0.5rem;
  font-weight: 500;
  transition: transform 0.15s ease, box-shadow 0.15s ease,
    background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.btn:hover {
  transform: translateY(-1px);
}
.btn:active {
  transform: translateY(0);
}
.btn:focus-visible {
  box-shadow: 0 0 0 0.2rem rgba(var(--accent-rgb), 0.3);
}

.btn-primary {
  background-color: var(--accent);
  border-color: var(--accent);
  color: #241a0e;
}
.btn-primary:hover,
.btn-primary:focus {
  background-color: var(--accent-strong);
  border-color: var(--accent-strong);
  color: #241a0e;
  box-shadow: 0 4px 14px rgba(var(--accent-rgb), 0.35);
}

.btn-outline-primary {
  color: var(--accent-strong);
  border-color: rgba(var(--accent-rgb), 0.6);
}
.btn-outline-primary:hover {
  background: rgba(var(--accent-rgb), 0.14);
  border-color: var(--accent);
  color: #f7ede0;
}

.btn-outline-secondary {
  color: #c7b9a6;
  border-color: var(--panel-border);
}
.btn-outline-secondary:hover {
  background-color: rgba(199, 185, 166, 0.12);
  border-color: #6b5c48;
  color: #f7ede0;
}

.btn-sm {
  border-radius: 0.4rem;
}

/* ---------------------------------------------------------------------
   Cards
--------------------------------------------------------------------- */

.card {
  background-color: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 0.75rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.auth-card {
  border: 1px solid var(--panel-border);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.auth-logo {
  height: 68px;
  width: auto;
  filter: invert(1) drop-shadow(0 1px 3px rgba(0, 0, 0, 0.6));
}

.stat-card {
  border-inline-start: 3px solid var(--accent);
}

/* ---------------------------------------------------------------------
   Tables
--------------------------------------------------------------------- */

.table {
  --bs-table-bg: transparent;
  --bs-table-color: #ddd1c0;
}
.table > :not(caption) > * > * {
  border-bottom-color: var(--panel-border);
}
.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.sortable-header {
  position: relative;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  padding-inline-end: 1.2rem;
  transition: background-color 0.15s ease;
}
.sortable-header:hover {
  background-color: rgba(var(--accent-rgb), 0.1);
}
.sort-arrow {
  font-size: 0.7rem;
  color: var(--accent);
}
.filter-dot {
  display: none;
  position: absolute;
  top: 7px;
  inset-inline-end: 5px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
.sortable-header.has-filter .filter-dot {
  display: block;
}

tbody tr {
  transition: background-color 0.15s ease;
}
.table-hover > tbody > tr:hover > * {
  background-color: rgba(var(--accent-rgb), 0.08);
  color: #f7ede0;
}

/* Right-click column filter popup */
.col-filter-popup {
  position: fixed;
  z-index: 1080;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--panel-bg-elevated);
  border: 1px solid var(--panel-border);
  border-radius: 0.5rem;
  padding: 0.5rem;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.5);
}
.col-filter-popup input {
  min-width: 180px;
}

/* ---------------------------------------------------------------------
   Accordion (catalog "chapters")
--------------------------------------------------------------------- */

.accordion-item {
  background-color: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 0.75rem !important;
  overflow: hidden;
  margin-bottom: 0.85rem;
}
.accordion-button {
  background-color: var(--panel-bg);
  color: #f7ede0;
  font-weight: 600;
  box-shadow: none !important;
}
.accordion-button:not(.collapsed) {
  background-color: rgba(var(--accent-rgb), 0.1);
  color: #f7ede0;
  border-bottom: 1px solid var(--panel-border);
}
.accordion-button:focus {
  box-shadow: 0 0 0 0.2rem rgba(var(--accent-rgb), 0.25);
}
.accordion-button::after {
  filter: invert(1) grayscale(1) brightness(1.6);
}
.accordion-body {
  background-color: var(--panel-bg);
}
.module-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 50%;
  background: rgba(var(--accent-rgb), 0.18);
  color: var(--accent-strong);
  font-weight: 700;
  font-size: 0.85rem;
  margin-inline-end: 0.75rem;
  flex-shrink: 0;
}

/* ---------------------------------------------------------------------
   Big nav buttons (mentor dashboard hub)
--------------------------------------------------------------------- */

.big-nav-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 3rem 1rem;
  font-size: 1.15rem;
  font-weight: 600;
  border-radius: 1rem;
}
.big-nav-btn i {
  font-size: 2.5rem;
}
.big-nav-btn:hover {
  box-shadow: 0 6px 20px rgba(var(--accent-rgb), 0.2);
}

/* ---------------------------------------------------------------------
   Activation toggle switch
--------------------------------------------------------------------- */

.activation-switch .form-check-input {
  width: 2.6em;
  height: 1.4em;
  cursor: pointer;
  /* Off state must read as clearly inactive — a neutral gray, not the theme
     accent, otherwise an unchecked switch looks "on". */
  background-color: #4a4a4a;
  border-color: #6b6b6b;
}
.activation-switch .form-check-input:checked {
  background-color: #3f8f52;
  border-color: #3f8f52;
}
.activation-switch .form-check-input:focus {
  box-shadow: 0 0 0 0.2rem rgba(var(--accent-rgb), 0.25);
}

/* ---------------------------------------------------------------------
   Inline-editable admin tables (Users, Classes)
--------------------------------------------------------------------- */

.cell-edit {
  min-width: 90px;
}
.cell-display {
  display: inline-block;
}
.btn-save-row,
.btn-cancel-row {
  white-space: nowrap;
}
.btn-kebab {
  border: none;
  background: transparent;
  color: #c7b9a6;
  padding: 0.25rem 0.5rem;
  border-radius: 0.4rem;
}
.btn-kebab:hover,
.btn-kebab:focus {
  background: rgba(var(--accent-rgb), 0.14);
  color: #f7ede0;
}
.btn-kebab::after {
  display: none;
}

/* ---------------------------------------------------------------------
   Drag-to-reorder + inline edit (admin catalog)
--------------------------------------------------------------------- */

.drag-handle {
  cursor: grab;
  white-space: nowrap;
}
tr.dragging {
  opacity: 0.45;
}
.module-drag-handle {
  cursor: grab;
  align-self: stretch;
  display: flex;
  align-items: center;
}
.accordion-item.dragging {
  opacity: 0.45;
}
tr[draggable="true"] {
  transition: background-color 0.15s ease;
}
.field-saved {
  box-shadow: 0 0 0 2px rgba(var(--accent-rgb), 0.55) inset !important;
  transition: box-shadow 0.3s ease;
}

/* ---------------------------------------------------------------------
   Forms
--------------------------------------------------------------------- */

.form-control,
.form-select {
  background-color: #211a11;
  border-color: var(--panel-border);
  color: #ede3d5;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.form-control:focus,
.form-select:focus {
  background-color: #211a11;
  border-color: var(--accent);
  box-shadow: 0 0 0 0.2rem rgba(var(--accent-rgb), 0.2);
  color: #f7ede0;
}
.form-control::placeholder {
  color: #8a7c68;
}
.form-label {
  color: #c7b9a6;
  font-weight: 600;
}

/* Long forms are broken into titled sections (see workshop_form.html):
   header row with an accent icon, a one-line hint, then the fields. */
.form-section {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--panel-border);
}
.form-section-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #f7ede0;
  font-weight: 700;
  margin-bottom: 0.2rem;
}
.form-section-title .bi {
  color: var(--accent);
}
.form-section-hint {
  color: #8a7c68;
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

/* Collapsible form chapters (workshop_form.html): each chapter is a header
   row (expand button + optional "not relevant" switch) over a collapsed
   body. Chapters marked irrelevant fade out and lose their required flags. */
.form-chapter {
  border-top: 1px solid var(--panel-border);
}
.form-chapter-head {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.form-chapter-toggle {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: 0;
  padding: 0.8rem 0;
  color: #f7ede0;
  font-weight: 700;
  text-align: start;
  transition: opacity 0.15s ease;
}
.form-chapter-toggle > .bi:first-child {
  color: var(--accent);
}
.form-chapter-chevron {
  margin-inline-start: auto;
  color: #8a7c68;
  font-size: 0.85rem;
  transition: transform 0.2s ease;
}
.form-chapter-toggle:not(.collapsed) .form-chapter-chevron {
  transform: rotate(180deg);
}
.form-chapter-body {
  padding: 0.25rem 0 1.25rem;
}
.chapter-badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.3em 0.65em;
  border-radius: 999px;
  background-color: rgba(var(--accent-rgb), 0.16);
  color: var(--accent-strong);
}
.chapter-badge.optional,
.form-chapter.irrelevant .chapter-badge {
  background-color: rgba(138, 124, 104, 0.18);
  color: #a5947c;
}
.form-chapter.irrelevant .form-chapter-toggle {
  opacity: 0.5;
}

/* File inputs are wrapped in a drop zone by file-drop.js: the native input
   is stretched invisibly over the whole zone, so click-to-browse and
   drag-and-drop both land on it. */
.file-drop-zone {
  position: relative;
  border: 2px dashed var(--panel-border);
  border-radius: 0.6rem;
  background-color: #211a11;
  padding: 1rem 0.75rem;
  text-align: center;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}
.file-drop-zone input[type="file"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}
.file-drop-zone .fdz-prompt,
.file-drop-zone .fdz-filename {
  pointer-events: none;
}
.file-drop-zone .fdz-prompt {
  color: #8a7c68;
  font-size: 0.85rem;
}
.file-drop-zone .fdz-prompt .bi {
  font-size: 1.4rem;
  display: block;
  margin-bottom: 0.15rem;
}
.file-drop-zone .fdz-filename {
  color: #f7ede0;
  font-size: 0.85rem;
  margin-top: 0.25rem;
  direction: ltr; /* filenames are mostly Latin; keeps the extension on the right side */
  overflow-wrap: anywhere;
}
.file-drop-zone .fdz-filename.fdz-error {
  color: #ea868f;
  direction: rtl; /* the rejection message is Hebrew */
}
.file-drop-zone.dragover,
.file-drop-zone:focus-within {
  border-color: var(--accent);
  background-color: rgba(var(--accent-rgb), 0.08);
}
.file-drop-zone.has-file {
  border-style: solid;
  border-color: rgba(var(--accent-rgb), 0.55);
}

/* ---------------------------------------------------------------------
   Misc components
--------------------------------------------------------------------- */

.alert {
  border-radius: 0.6rem;
  border: 1px solid var(--panel-border);
}

.badge-points {
  font-size: 1.1rem;
}

.mentor-chip {
  display: inline-flex;
  align-items: center;
  font-size: 0.9rem;
  padding: 0.45em 0.8em;
  background-color: rgba(var(--accent-rgb), 0.14);
  border: 1px solid rgba(var(--accent-rgb), 0.35);
  color: #f7ede0;
  border-radius: 999px;
}
.mentor-chip .btn-close {
  font-size: 0.6rem;
  filter: invert(1) grayscale(1) brightness(1.6);
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.35em 0.7em;
  color: #fff;
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.35);
  line-height: 1.4;
}
.tag-chip .btn-close {
  font-size: 0.55em;
  filter: invert(1) grayscale(1) brightness(1.8);
}
.tag-picker .tag-text-input,
.tag-picker .tag-select-input {
  min-width: 130px;
}

.pdf-frame {
  width: 100%;
  height: 75vh;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background: #211a11;
}

.pptx-viewer {
  width: 100%;
  height: 75vh;
  overflow: auto;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background: #211a11;
  padding: 0 0.75rem 0.75rem;
}

.pptx-toolbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0;
  margin-bottom: 0.5rem;
  background: #211a11;
  border-bottom: 1px solid var(--panel-border);
}
.pptx-zoom-label,
.pptx-slide-total {
  font-size: 0.85rem;
  color: #c7b9a6;
  min-width: 2.5rem;
  text-align: center;
}
.pptx-toolbar-sep {
  width: 1px;
  align-self: stretch;
  background: var(--panel-border);
  margin: 0 0.25rem;
}
.pptx-slide-input {
  width: 60px;
}

.pptx-slide-box {
  direction: ltr; /* slide content is absolutely positioned LTR by PPTXjs */
  margin: 0 auto 1rem;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.4);
  position: relative;
}
.pptx-slide-box .slide {
  transform-origin: top left;
}
.pptx-slide-badge {
  position: absolute;
  top: 4px;
  left: 4px;
  background: rgba(0, 0, 0, 0.6);
  color: #f7ede0;
  font-size: 0.7rem;
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  pointer-events: none;
}

@media (max-width: 576px) {
  .pdf-frame,
  .pptx-viewer {
    height: 60vh;
  }
}