/* ============================================================================
   assets/css/document-viewer.css
   Right-rail "Attached Documents" panel + native-iframe PDF modal
   ========================================================================== */

/* ----------------------------------------------------------------------------
   Tokens
   -------------------------------------------------------------------------- */
.tppl-document-viewer,
.tppl-doc-viewer-modal {
  --dv-accent: var(--tppl-accent-light, #a47cff);
  --dv-accent-strong: var(--tppl-accent, #9c5bd2);
  --dv-accent-deep: #6e29a3;
  --dv-hover: #F02E65;
  --dv-card: #1d1535;
  --dv-card-2: #15102a;
  --dv-card-3: #261d44;
  --dv-text: #f1ecff;
  --dv-text-dim: #b6abdc;
  --dv-text-meta: #8b80b7;
  --dv-border: rgba(164, 124, 255, 0.18);
  --dv-border-strong: rgba(164, 124, 255, 0.55);
  --dv-shadow: 0 14px 38px -12px rgba(0, 0, 0, 0.65),
               0 4px 12px rgba(0, 0, 0, 0.35);
  --dv-radius: 14px;
  --dv-radius-sm: 10px;
}

/* ============================================================================
   1. SIDEBAR PANEL (right rail on desktop, full-width below article on mobile)
   ========================================================================== */

.tppl-document-viewer {
  position: relative;
  max-width: 820px;
  margin: 2.5rem auto 3rem;
  padding: 1.75rem 1.75rem 1.5rem;
  background:
    radial-gradient(120% 100% at 0% 0%, rgba(164,124,255,0.10) 0%, transparent 55%),
    linear-gradient(180deg, var(--dv-card-3) 0%, var(--dv-card) 100%);
  border-radius: var(--dv-radius);
  border: 1px solid var(--dv-border);
  box-shadow: var(--dv-shadow);
  font-family: 'Inter', system-ui, sans-serif;
}

.tppl-document-viewer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 1.5rem;
  right: 1.5rem;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--dv-accent) 50%, transparent);
  opacity: 0.7;
}

/* ----------------------------------------------------------------------------
   Desktop float — panel lives in the right gutter, never overlaps the
   820px-wide article column.

   Math:
     gutter on each side  = (100vw - 820px) / 2
     panel width          = 300px (320px at >=1500)
     desired gap          = 32px (48px at >=1500)
     margin-right needed  = -(gutter - panel - gap)

   Negating that pulls the panel rightward into the gutter without ever
   crossing the article edge. clamp() prevents the formula from going
   positive on viewports too narrow to clear the math.
   -------------------------------------------------------------------------- */
@media (min-width: 1200px) {
  .tppl-document-viewer {
    position: sticky;
    top: 6rem;
    float: right;
    clear: right;
    width: 300px;
    max-width: 300px;
    margin: 0 0 2rem 2.5rem;
  }
}

@media (min-width: 1500px) {
  .tppl-document-viewer {
    width: 320px;
    max-width: 320px;
  }
}

.tppl-document-viewer__heading {
  font-family: 'Playfair Display', Georgia, serif;
  color: var(--dv-accent);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  margin: 0 0 1.25rem;
  padding: 0;
  border: 0;
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.tppl-document-viewer__heading::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--dv-border-strong), transparent);
}

.tppl-document-viewer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.tppl-document-viewer__item {
  position: relative;
  display: grid;
  grid-template-columns: 38px 1fr;
  grid-template-areas:
    "icon body"
    "actions actions";
  column-gap: 0.85rem;
  row-gap: 0.85rem;
  padding: 0.9rem 0.95rem 0.85rem;
  background: var(--dv-card-2);
  border-radius: var(--dv-radius-sm);
  border: 1px solid var(--dv-border);
}

/* PDF badge icon */
.tppl-document-viewer__icon {
  grid-area: icon;
  width: 38px;
  height: 46px;
  border-radius: 6px;
  background: linear-gradient(160deg, var(--dv-accent) 0%, var(--dv-accent-deep) 100%);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.18),
    0 2px 6px rgba(0, 0, 0, 0.35);
  position: relative;
  overflow: hidden;
  font-size: 0;
}

.tppl-document-viewer__icon::before {
  content: "PDF";
  font-family: 'Inter', sans-serif;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #fff;
  padding-bottom: 5px;
}

.tppl-document-viewer__icon::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 10px;
  height: 10px;
  background: linear-gradient(225deg, rgba(0, 0, 0, 0.35) 50%, rgba(255, 255, 255, 0.18) 50%);
  border-bottom-left-radius: 3px;
}

.tppl-document-viewer__body {
  grid-area: body;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.tppl-document-viewer__title {
  color: var(--dv-text);
  font-weight: 600;
  font-size: 0.92rem;
  line-height: 1.35;
  margin: 0 0 0.2rem;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.tppl-document-viewer__meta {
  font-size: 0.72rem;
  color: var(--dv-text-meta);
  display: flex;
  gap: 0.4rem;
  align-items: baseline;
  flex-wrap: wrap;
  font-variant-numeric: tabular-nums;
}

.tppl-document-viewer__filename {
  max-width: 18ch;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  opacity: 0.85;
}

.tppl-document-viewer__sep  { opacity: 0.55; }
.tppl-document-viewer__size { color: var(--dv-text-dim); }

.tppl-document-viewer__actions {
  grid-area: actions;
  display: flex;
  gap: 0.5rem;
  margin-top: 0.1rem;
}

.tppl-document-viewer__view-btn,
.tppl-document-viewer__download-btn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem 0.85rem;
  border-radius: 6px;
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease, transform 160ms ease;
  border: 1px solid transparent;
  line-height: 1;
}

.tppl-document-viewer__view-btn {
  background: linear-gradient(180deg, var(--dv-accent) 0%, var(--dv-accent-strong) 100%);
  color: #1b1431;
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.20) inset,
              0 4px 10px rgba(110, 41, 163, 0.35);
}

.tppl-document-viewer__view-btn:hover {
  background: var(--dv-hover);
  color: #fff;
  transform: translateY(-1px);
}

.tppl-document-viewer__view-btn:active { transform: translateY(0); }

.tppl-document-viewer__download-btn {
  background: transparent;
  color: var(--dv-text);
  border-color: var(--dv-border-strong);
}

.tppl-document-viewer__download-btn:hover {
  background: rgba(164, 124, 255, 0.10);
  color: var(--dv-accent);
  border-color: var(--dv-accent);
}

.tppl-document-viewer__view-btn:focus-visible,
.tppl-document-viewer__download-btn:focus-visible {
  outline: 2px solid var(--dv-accent);
  outline-offset: 2px;
}

/* ============================================================================
   2. NATIVE-IFRAME MODAL
   ========================================================================== */

.tppl-doc-viewer-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: none;
  font-family: 'Inter', system-ui, sans-serif;
}

.tppl-doc-viewer-modal[aria-hidden="false"] {
  display: block;
}

.tppl-doc-viewer-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(8, 5, 20, 0.78);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  animation: tpplDvFade 180ms ease-out;
}

.tppl-doc-viewer-modal__dialog {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(96vw, 1100px);
  height: min(94vh, 900px);
  background: linear-gradient(180deg, var(--dv-card-3) 0%, var(--dv-card) 100%);
  border: 1px solid var(--dv-border-strong);
  border-radius: var(--dv-radius);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.7),
              0 0 0 1px rgba(164, 124, 255, 0.08);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: tpplDvScale 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

@keyframes tpplDvFade  { from { opacity: 0; } to { opacity: 1; } }
@keyframes tpplDvScale {
  from { opacity: 0; transform: translate(-50%, -50%) scale(0.96); }
  to   { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

.tppl-doc-viewer-modal__header {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1.1rem;
  border-bottom: 1px solid var(--dv-border);
  background: rgba(0, 0, 0, 0.20);
}

.tppl-doc-viewer-modal__title {
  font-family: 'Playfair Display', Georgia, serif;
  color: var(--dv-text);
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1 1 auto;
  min-width: 0;
}

.tppl-doc-viewer-modal__download {
  flex: 0 0 auto;
  background: transparent;
  color: var(--dv-text);
  border: 1px solid var(--dv-border-strong);
  border-radius: 6px;
  padding: 0.45rem 0.85rem;
  font-size: 0.78rem;
  font-weight: 600;
  text-decoration: none;
  line-height: 1;
  transition: all 150ms ease;
}

.tppl-doc-viewer-modal__download:hover {
  background: rgba(164, 124, 255, 0.10);
  color: var(--dv-accent);
  border-color: var(--dv-accent);
}

.tppl-doc-viewer-modal__close {
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  border-radius: 6px;
  background: transparent;
  border: 1px solid var(--dv-border);
  color: var(--dv-text-dim);
  cursor: pointer;
  font-size: 1.3rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 150ms ease;
}

.tppl-doc-viewer-modal__close:hover {
  background: var(--dv-hover);
  color: #fff;
  border-color: var(--dv-hover);
}

.tppl-doc-viewer-modal__body {
  flex: 1 1 auto;
  background: #0a0717;
  overflow: hidden;
}

.tppl-doc-viewer-modal__frame {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
  background: #fff;
}

body.tppl-dv-modal-open {
  overflow: hidden;
}

@media (max-width: 700px) {
  .tppl-doc-viewer-modal__dialog {
    width: 100vw;
    height: 100vh;
    max-width: none;
    max-height: none;
    border-radius: 0;
    border: 0;
    top: 0;
    left: 0;
    transform: none;
  }

  @keyframes tpplDvScale {
    from { opacity: 0; }
    to   { opacity: 1; }
  }
}