/* ================================================================
   StitchTexTech — style.css
   Visuelles Design: schlicht, textil-inspiriert, bildungstauglich
   ================================================================ */

/* ── Reset ──────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: var(--font-base, 15px); -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button { cursor: pointer; font: inherit; border: none; background: none; }
input  { font: inherit; }
svg { display: block; }
ul { list-style: none; }

/* ── Design Tokens ──────────────────────────────────────────────── */
:root {
  --track-a: #C0392B;
  --track-b: #27AE60;
  --track-c: #2980B9;
  --track-d: #7F8C8D;
  --track-e: #9B59B6;
  --track-f: #E67E22;
  --track-g: #A66E4A;

  --bg:      #FAFAF8;
  --surface: #FFFFFF;
  --border:  #E5E7EB;
  --text:    #1A1A1A;
  --muted:   #6B7280;
  --accent:  #B87333;      /* Kupfer — Goldfaden */

  --radius:    3px;
  --radius-lg: 10px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.10), 0 2px 4px rgba(0,0,0,0.05);
  --shadow-up: 0 -4px 24px rgba(0,0,0,0.09), 0 -1px 4px rgba(0,0,0,0.05);

  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
  --font-sans: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;

  --header-h:  62px;
  --footer-h:  38px;
  --sidebar-w: 148px;
  --panel-h:   310px;
}

/* ── Textile Hintergrundtextur (Webgitter) ──────────────────────── */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent, transparent 9px,
      rgba(0,0,0,0.016) 9px, rgba(0,0,0,0.016) 10px
    ),
    repeating-linear-gradient(
      90deg,
      transparent, transparent 9px,
      rgba(0,0,0,0.016) 9px, rgba(0,0,0,0.016) 10px
    );
}

/* ── Header ─────────────────────────────────────────────────────── */
.stt-header {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  height: var(--header-h);
  padding: 0 18px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

/* Brand */
.stt-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.stt-brand__icon { color: var(--accent); }
.stt-brand__title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.stt-brand__sub {
  font-size: 0.66rem;
  color: var(--muted);
  white-space: nowrap;
}

/* Track Filter Buttons (inside popover) */
.stt-filters {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stt-filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px 4px 8px;
  border-radius: 100px;
  border: 1.5px solid var(--clr, #aaa);
  color: var(--clr, #aaa);
  font-size: 0.72rem;
  font-weight: 500;
  white-space: nowrap;
  opacity: 0.45;
  transition: opacity 0.18s, background 0.18s;
  background: transparent;
  text-decoration: line-through;
  text-decoration-color: color-mix(in srgb, var(--clr) 40%, transparent);
}
.stt-filter-btn.is-active {
  opacity: 1;
  background: color-mix(in srgb, var(--clr) 10%, transparent);
  text-decoration: none;
}
.stt-filter-btn:hover { opacity: 0.75; }
.stt-filter-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.stt-filter-btn__dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--clr, #aaa);
  flex-shrink: 0;
}

/* Controls */
.stt-controls {
  display: flex;
  align-items: center;
  gap: 7px;
  flex-shrink: 0;
}
.stt-search-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 9px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--muted);
  cursor: text;
}
.stt-search-wrap:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 15%, transparent);
}
.stt-search {
  border: none;
  background: none;
  outline: none;
  width: 130px;
  font-size: 0.78rem;
  color: var(--text);
}
.stt-search::placeholder { color: var(--muted); }

.stt-btn {
  padding: 5px 11px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.73rem;
  font-weight: 500;
  color: var(--text);
  background: var(--surface);
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  white-space: nowrap;
}
.stt-btn:hover { background: var(--bg); border-color: #CBD5E1; }
.stt-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.stt-btn[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.stt-btn--ghost {
  background: transparent;
  border-color: transparent;
  color: var(--muted);
}
.stt-btn--ghost:hover {
  color: var(--text);
  background: var(--bg);
  border-color: var(--border);
}

/* ── Präsentation Popover ─────────────────────────────────────────── */
.stt-pres-wrap {
  position: relative;
}
.stt-pres-caret {
  font-size: 0.65em;
  opacity: 0.6;
  margin-left: 2px;
}
.stt-pres-popover {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  width: 248px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 24px rgba(0,0,0,0.11);
  z-index: 200;
  overflow: hidden;
}
.stt-pres-list {
  max-height: 220px;
  overflow-y: auto;
  padding: 4px 0;
}
.stt-pres-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  cursor: pointer;
  font-size: 0.78rem;
  font-family: var(--font-sans);
  transition: background 0.12s;
  border-left: 3px solid transparent;
}
.stt-pres-item:hover { background: var(--bg); }
.stt-pres-item.is-active {
  border-left-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}
.stt-pres-item.is-active .stt-pres-item__label { font-weight: 600; color: var(--accent); }
.stt-pres-item__info { flex: 1; min-width: 0; }
.stt-pres-item__label {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.stt-pres-item__date {
  display: block;
  font-size: 0.67rem;
  color: var(--muted);
  font-family: var(--font-mono);
  margin-top: 1px;
}
.stt-pres-item__count {
  font-size: 0.67rem;
  color: var(--muted);
  font-family: var(--font-mono);
  flex-shrink: 0;
}
.stt-pres-empty {
  padding: 16px 12px;
  font-size: 0.75rem;
  color: var(--muted);
  text-align: center;
  line-height: 1.6;
}
.stt-pres-popover__footer {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 6px;
  border-top: 1px solid var(--border);
}
.stt-pres-popover__footer > #stt-session-add-btn {
  flex: 1;
  font-size: 0.74rem;
  text-align: left;
}
.stt-pres-popover__footer > #stt-session-mgr-btn {
  flex-shrink: 0;
  padding: 5px 8px;
  font-size: 0.74rem;
}
.stt-pres-actions {
  display: flex;
  gap: 4px;
  padding: 6px;
  border-top: 1px solid var(--border);
  background: var(--bg);
}
.stt-pres-actions .stt-btn {
  flex: 1;
  font-size: 0.74rem;
  justify-content: center;
  text-align: center;
}

/* Schriftgröße A−/A+ */
.stt-fontsize-group {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.stt-fontsize-btn {
  padding: 4px 8px;
  font-size: 0.73rem;
  font-weight: 600;
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--surface);
  border: none;
  border-right: 1px solid var(--border);
  transition: background 0.15s;
  line-height: 1;
}
.stt-fontsize-btn:last-child { border-right: none; }
.stt-fontsize-btn:hover { background: var(--bg); }
.stt-fontsize-btn:disabled { opacity: 0.3; cursor: default; }
.stt-fontsize-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

/* Metrik-Overlay SVG-Elemente */
.stt-metric-overlay { pointer-events: none; }
.stt-metric-area    { transition: opacity 0.3s; }
.stt-metric-line    { transition: opacity 0.3s; }

/* ── Main Layout ─────────────────────────────────────────────────── */
.stt-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  z-index: 1;
  min-height: 0;
}

.stt-timeline-wrapper {
  flex: 1;
  display: flex;
  overflow: hidden;
  min-height: 0;
}

/* ── Track Sidebar ───────────────────────────────────────────────── */
.stt-track-sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  display: grid;
  /* grid-template-rows wird per JS gesetzt */
  background: var(--surface);
  border-right: 1px solid var(--border);
  z-index: 2;
  user-select: none;
}

.stt-track-label {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 0 10px 0 12px;
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--muted);
  line-height: 1.35;
  transition: color 0.2s, opacity 0.2s;
  border-bottom: 1px solid var(--border);
}
.stt-track-label:last-child { border-bottom: none; }
.stt-track-label.is-hidden { opacity: 0.28; }

.stt-track-label__swatch {
  width: 3px;
  min-height: 28px;
  border-radius: 2px;
  flex-shrink: 0;
  align-self: stretch;
  margin: 10px 0;
}

/* ── SVG Wrapper ─────────────────────────────────────────────────── */
.stt-svg-wrapper {
  flex: 1;
  overflow: hidden;
  position: relative;
  cursor: grab;
  /* Subtile Webstruktur als SVG-Hintergrund */
  background-color: var(--bg);
}
.stt-svg-wrapper:active { cursor: grabbing; }
.stt-svg-wrapper[data-panning] { cursor: grabbing; }

#stt-svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* ── Tooltip / Hover-Preview ─────────────────────────────────────── */
.stt-tooltip {
  position: absolute;
  top: 0; left: 0;
  background: var(--surface);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  padding: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  pointer-events: none;
  z-index: 50;
  width: 240px;
  white-space: normal;
  transform: translate(-50%, calc(-100% - 12px));
  box-shadow: var(--shadow-md);
  opacity: 0;
  transition: opacity 0.14s;
}
.stt-tooltip.is-visible { opacity: 1; }

/* Vorschaubild */
.stt-tooltip__img {
  width: 100%;
  height: 130px;
  object-fit: cover;
  display: block;
  border-bottom: 1px solid var(--border);
}

/* Textbereich (immer mit Padding) */
.stt-tooltip__body {
  padding: 9px 12px;
}

/* Pfeil nach unten (Standard: Tooltip über dem Kreis) */
.stt-tooltip::after {
  content: '';
  position: absolute;
  top: 100%; left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--border);
}
.stt-tooltip::before {
  content: '';
  position: absolute;
  top: calc(100% - 1px); left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--surface);
  z-index: 1;
}

/* Tooltip unter dem Kreis (Track A, zu wenig Platz nach oben) */
.stt-tooltip.is-flipped {
  transform: translate(-50%, 12px);
}
.stt-tooltip.is-flipped::after {
  top: auto;
  bottom: 100%;
  border-top-color: transparent;
  border-bottom-color: var(--border);
}
.stt-tooltip.is-flipped::before {
  top: auto;
  bottom: calc(100% - 1px);
  border-top-color: transparent;
  border-bottom-color: var(--surface);
}
.stt-tooltip__meta {
  display: flex;
  align-items: baseline;
  gap: 7px;
  margin-bottom: 4px;
}
.stt-tooltip__year {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1;
  color: var(--text);
  flex-shrink: 0;
}
.stt-tooltip__badge {
  font-size: 0.58rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 1px 6px;
  border-radius: 100px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 120px;
}
.stt-tooltip__title {
  font-weight: 600;
  font-size: 0.78rem;
  line-height: 1.3;
  margin-bottom: 2px;
}
.stt-tooltip__sub {
  font-size: 0.68rem;
  color: var(--muted);
  font-style: italic;
  margin-bottom: 3px;
}
.stt-tooltip__desc {
  font-size: 0.68rem;
  color: var(--muted);
  line-height: 1.5;
  margin-top: 4px;
  padding-top: 4px;
  border-top: 1px solid var(--border);
}

/* ── D3 SVG Element-Styles ───────────────────────────────────────── */
.stt-axis text {
  font-family: var(--font-mono);
  fill: var(--muted);
  /* font-size set dynamically by D3 via svgPx(10) */
}
.stt-axis .domain { stroke: var(--border); }
.stt-axis .tick line { stroke: var(--border); stroke-width: 0.5; }

.stt-track-band:nth-child(even) { fill: rgba(0,0,0,0.013); }
.stt-track-band:nth-child(odd)  { fill: transparent; }

.stt-track-line { fill: none; }

/* Event circles */
.stt-event {
  cursor: pointer;
  transition: filter 0.15s;
}
.stt-event:hover      { filter: brightness(1.15) drop-shadow(0 0 4px currentColor); }
.stt-event:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.stt-event.is-selected {
  filter: drop-shadow(0 0 7px currentColor);
}
.stt-event.is-faded {
  opacity: 0.12;
  pointer-events: none;
}
.stt-event.is-landmark {
  stroke: rgba(255,255,255,0.7);
  stroke-width: 2;
}

/* Permanente Event-Labels (Track-View) — <g> mit Pill-Hintergrund */
.stt-event-label {
  user-select: none;
}
.stt-event-label.is-faded {
  opacity: 0.07;
}

/* Decade markers */
.stt-decade-mark { stroke: #CBD5E1; stroke-width: 1; }
.stt-century-mark { stroke: #94A3B8; stroke-width: 1.5; }

/* Connection paths */
.stt-connection {
  fill: none;
  stroke-width: 1.2;
  stroke-dasharray: 4,3;
  pointer-events: none;
  transition: opacity 0.3s;
}

/* ── Detail Panel v2 ────────────────────────────────────────────── */
.stt-panel {
  position: fixed;
  top: var(--header-h);
  right: 0;
  bottom: var(--footer-h);
  width: clamp(310px, 38vw, 460px);
  background: var(--surface);
  border-left: 1px solid var(--border);
  box-shadow: -6px 0 32px rgba(0,0,0,0.10), -1px 0 4px rgba(0,0,0,0.04);
  z-index: 20;
  display: flex;
  flex-direction: column;
  transform: translateX(110%);
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}
.stt-panel.is-open { transform: translateX(0); }

.stt-panel__track-bar {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  transition: background 0.2s;
  z-index: 1;
}

.stt-panel__header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px 8px 18px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.stt-panel__nav {
  display: flex;
  gap: 3px;
}

.stt-panel__nav-btn {
  padding: 3px 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.8rem;
  color: var(--muted);
  background: var(--surface);
  transition: background 0.12s, color 0.12s;
  line-height: 1;
}
.stt-panel__nav-btn:hover:not(:disabled) { background: var(--bg); color: var(--text); }
.stt-panel__nav-btn:disabled { opacity: 0.3; cursor: default; }
.stt-panel__nav-btn:focus-visible { outline: 2px solid var(--accent); }

.stt-panel__meta {
  flex: 1;
  display: flex;
  align-items: baseline;
  gap: 7px;
  min-width: 0;
  overflow: hidden;
}

.stt-panel__year {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1;
  color: var(--text);
  flex-shrink: 0;
}

.stt-panel__badge {
  font-size: 0.58rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 7px;
  border-radius: 100px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.stt-panel__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px; height: 26px;
  border-radius: var(--radius);
  color: var(--muted);
  flex-shrink: 0;
  margin-left: auto;
}
.stt-panel__close:hover { background: var(--bg); color: var(--text); }
.stt-panel__close:focus-visible { outline: 2px solid var(--accent); }

/* Scrollable body */
.stt-panel__body {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  transition: opacity 0.16s;
}
.stt-panel__body.is-fading { opacity: 0; }

/* Titles */
.stt-panel__titles {
  padding: 12px 18px 8px 18px;
  flex-shrink: 0;
}

.stt-panel__title {
  font-size: 1.0rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 2px;
}

.stt-panel__subtitle {
  font-size: 0.75rem;
  color: var(--muted);
  font-style: italic;
}

/* Gallery */
.stt-panel__gallery {
  flex-shrink: 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stt-gallery__stage {
  position: relative;
  width: 100%;
  height: 200px;
  overflow: hidden;
  background: var(--bg);
}

.stt-gallery__stage > * {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.22s;
}
.stt-gallery__stage > .is-active { opacity: 1; }

.stt-gallery__img {
  object-fit: contain;
  background: var(--bg);
}

.stt-gallery__video {
  border: none;
}

.stt-gallery__embed-wrap {
  position: absolute;
  inset: 0;
}
.stt-gallery__embed-wrap iframe {
  width: 100%;
  height: 100%;
  border: none;
  pointer-events: none;
}
.stt-gallery__embed-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: 8px;
  background: linear-gradient(to top, rgba(0,0,0,0.30) 0%, transparent 55%);
}
.stt-gallery__embed-link {
  font-size: 0.7rem;
  padding: 4px 11px;
  background: rgba(255,255,255,0.92);
  border-radius: 100px;
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  transition: background 0.12s;
}
.stt-gallery__embed-link:hover { background: #fff; text-decoration: none; }

.stt-gallery__bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  min-height: 32px;
  background: var(--surface);
}

.stt-gallery__arrow {
  padding: 2px 6px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.78rem;
  color: var(--muted);
  background: var(--surface);
  line-height: 1;
  flex-shrink: 0;
  transition: background 0.12s, color 0.12s;
}
.stt-gallery__arrow:hover:not(:disabled) { background: var(--bg); color: var(--text); }
.stt-gallery__arrow:disabled { opacity: 0.3; cursor: default; }

.stt-gallery__dots {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.stt-gallery__dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--border);
  border: none;
  padding: 0;
  cursor: pointer;
  transition: background 0.15s, transform 0.15s;
}
.stt-gallery__dot.is-active {
  background: var(--accent);
  transform: scale(1.25);
}
.stt-gallery__dot:focus-visible { outline: 2px solid var(--accent); }

.stt-gallery__caption {
  font-size: 0.62rem;
  color: var(--muted);
  font-family: var(--font-mono);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
  flex: 1;
}

/* Description */
.stt-panel__desc {
  font-size: 0.78rem;
  line-height: 1.65;
  color: var(--text);
  padding: 10px 18px;
}

/* Connections */
.stt-panel__connections {
  padding: 4px 14px 10px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 5px;
  border-top: 1px solid var(--border);
}

.stt-connections__label {
  font-size: 0.6rem;
  color: var(--muted);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  width: 100%;
  padding-top: 8px;
}

.stt-conn-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px 3px 6px;
  border-radius: 100px;
  border: 1px solid var(--border);
  font-size: 0.67rem;
  color: var(--text);
  background: var(--surface);
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
  white-space: nowrap;
}
.stt-conn-chip:hover { background: var(--bg); border-color: #CBD5E1; }
.stt-conn-chip:focus-visible { outline: 2px solid var(--accent); }

.stt-conn-chip__dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Links */
.stt-panel__links {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  padding: 8px 18px;
  border-top: 1px solid var(--border);
}

.stt-panel__link {
  font-size: 0.7rem;
  padding: 3px 10px;
  border: 1px solid currentColor;
  border-radius: 100px;
  color: var(--accent);
  text-decoration: none;
  transition: background 0.14s;
}
.stt-panel__link:hover {
  background: color-mix(in srgb, var(--accent) 9%, transparent);
  text-decoration: none;
}
.stt-panel__link:focus-visible { outline: 2px solid var(--accent); }

/* Source */
.stt-panel__source {
  font-size: 0.6rem;
  color: var(--muted);
  font-family: var(--font-mono);
  padding: 8px 18px 14px;
  border-top: 1px solid var(--border);
  line-height: 1.4;
  margin-top: auto;
}

/* ── Footer ─────────────────────────────────────────────────────── */
.stt-footer {
  height: var(--footer-h);
  background: var(--surface);
  border-top: 1px solid var(--border);
  font-size: 0.68rem;
  color: var(--muted);
  flex-shrink: 0;
  position: relative;
  z-index: 10;
}

.stt-footer__row {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 14px 0 14px;
  gap: 8px;
}

.stt-footer__popover-wrap {
  position: relative;
}

.stt-footer__spacer {
  flex: 1;
}

/* Trigger-Button */
.stt-overlay-trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px 3px 8px;
  border-radius: 100px;
  border: 1.5px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  font-size: 0.67rem;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
  white-space: nowrap;
}
.stt-overlay-trigger:hover,
.stt-overlay-trigger[aria-expanded="true"] {
  border-color: var(--accent);
  color: var(--text);
}
.stt-overlay-trigger.has-active {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, var(--surface));
  color: var(--text);
}
.stt-overlay-trigger__icon {
  font-size: 0.75rem;
  opacity: 0.6;
}
.stt-overlay-trigger__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border-radius: 100px;
  background: var(--accent);
  color: white;
  font-size: 0.58rem;
  font-family: var(--font-mono);
  font-weight: 600;
}
.stt-overlay-trigger__chevron {
  font-size: 0.55rem;
  opacity: 0.5;
  transition: transform 0.18s;
}
.stt-overlay-trigger[aria-expanded="true"] .stt-overlay-trigger__chevron {
  transform: rotate(180deg);
}

/* Popover-Panel */
.stt-overlay-popover {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 0;
  width: 360px;
  max-width: calc(100vw - 28px);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 -6px 28px rgba(0,0,0,0.10), 0 -1px 6px rgba(0,0,0,0.04);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  z-index: 120;
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
  pointer-events: none;
}
.stt-overlay-popover.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}
#stt-filter-popover {
  width: 210px;
  padding: 10px 12px;
  gap: 4px;
}

/* Overlay-Gruppen */
.stt-overlay-group__label {
  font-family: var(--font-mono);
  font-size: 0.60rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  margin-bottom: 7px;
}
.stt-overlay-group__btns {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.stt-metric-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 9px 2px 7px;
  border-radius: 100px;
  border: 1.5px dashed var(--clr, #aaa);
  color: var(--clr, #aaa);
  font-size: 0.67rem;
  font-weight: 500;
  white-space: nowrap;
  opacity: 0.38;
  transition: opacity 0.18s, background 0.18s, border-style 0.18s;
  background: transparent;
}
.stt-metric-btn.is-active {
  opacity: 1;
  border-style: solid;
  background: color-mix(in srgb, var(--clr) 10%, transparent);
}
.stt-metric-btn:hover { opacity: 0.72; }
.stt-metric-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.stt-metric-btn__dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr, #aaa);
  flex-shrink: 0;
}
.stt-metric-btn__label {
  /* Haupttext */
}
.stt-metric-btn__unit {
  font-size: 0.60rem;
  opacity: 0.65;
  margin-left: 2px;
  font-family: var(--font-mono);
}
.stt-metric-btn__badge {
  font-size: 0.58rem;
  font-family: var(--font-mono);
  font-weight: 600;
  background: var(--clr, #aaa);
  color: white;
  border-radius: 3px;
  padding: 0 3px;
  margin-left: 3px;
  opacity: 0.8;
  letter-spacing: 0.02em;
}
.stt-metric-btn.is-active .stt-metric-btn__badge {
  opacity: 1;
}

/* Crosshair SVG-Elemente */
.stt-metric-crosshair { pointer-events: none; }

/* Filter-Buttons in Footer (innerhalb .stt-footer__top) */
.stt-footer__top .stt-filters {
  padding-right: 12px;
}
.stt-footer__top .stt-filter-btn {
  font-size: 0.68rem;
  padding: 3px 9px 3px 7px;
}

/* Lizenz + Hilfe-Buttons */
.stt-footer__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  padding-left: 14px;
  border-left: 1px solid var(--border);
  white-space: nowrap;
}

.stt-footer a { color: var(--muted); }
.stt-footer a:hover { color: var(--accent); }
.stt-footer__sep { color: var(--border); }

/* ── Modals ──────────────────────────────────────────────────────── */
.stt-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.35);
  z-index: 40;
  backdrop-filter: blur(2px);
}
.stt-modal {
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  z-index: 50;
  width: min(480px, 90vw);
}
.stt-modal__box {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 28px;
  position: relative;
  max-height: 80vh;
  overflow-y: auto;
}
.stt-modal__box--wide { width: min(680px, 92vw); }
.stt-modal__close {
  position: absolute;
  top: 14px; right: 16px;
  font-size: 1.3rem;
  color: var(--muted);
  line-height: 1;
  padding: 2px 6px;
  border-radius: var(--radius);
}
.stt-modal__close:hover { background: var(--bg); color: var(--text); }
.stt-modal h3 {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  margin-bottom: 16px;
}
.stt-modal ul { display: flex; flex-direction: column; gap: 7px; }
.stt-modal li { font-size: 0.8rem; line-height: 1.4; }
.stt-modal li strong { color: var(--text); }
.stt-modal__note {
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 14px;
  padding: 10px;
  background: var(--bg);
  border-radius: var(--radius);
  font-style: italic;
}

/* Sources list */
.stt-sources-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.stt-source-entry {
  font-size: 0.74rem;
  line-height: 1.5;
  padding: 8px 10px;
  background: var(--bg);
  border-radius: var(--radius);
  border-left: 2px solid var(--border);
  font-family: var(--font-mono);
}

/* ── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .stt-brand__sub { display: none; }
}

@media (max-width: 700px) {
  .stt-header {
    padding: 0 12px;
    gap: 10px;
  }
  .stt-brand__sub { display: none; }
  .stt-track-sidebar { display: none; }
  :root { --sidebar-w: 0px; }
  .stt-panel { width: 100vw; }

  /* Footer: kompakter auf kleinen Screens */
  .stt-footer__row { padding: 0 8px; gap: 6px; }
  .stt-footer__meta { display: none; }
}

@media (max-width: 900px) {
  /* Lizenztext im Footer ausblenden, Buttons bleiben sichtbar */
  .stt-footer__meta span:not(.stt-footer__sep) { display: none; }
  .stt-footer__sep { display: none; }
}

/* ── Toast ───────────────────────────────────────────────────────── */
#stt-toast {
  position: fixed;
  bottom: calc(var(--footer-h) + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--text);
  color: #fff;
  font-size: 0.75rem;
  padding: 7px 16px;
  border-radius: 100px;
  z-index: 60;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  white-space: nowrap;
  max-width: 90vw;
  overflow: hidden;
  text-overflow: ellipsis;
}
#stt-toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── Druckansicht ───────────────────────────────────────────────── */
@media print {
  body { overflow: visible; height: auto; }
  .stt-header { box-shadow: none; position: static; }
  .stt-controls { display: none; }
  .stt-panel { display: none !important; }
  .stt-footer .stt-btn { display: none; }
  .stt-modal, .stt-modal-overlay { display: none !important; }
  .stt-svg-wrapper { height: 500px; }
}

/* ── Reduced Motion ──────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .stt-panel,
  .stt-tooltip,
  .stt-filter-btn,
  .stt-metric-btn,
  .stt-metric-area,
  .stt-metric-line,
  .stt-connection { transition: none; }
}

/* ── Kompakt-Modus: Cards und Stems ─────────────────────────────── */
.stt-card__year {
  font-family: var(--font-mono);
  font-size: var(--svg-card-font, 9px);
  font-weight: 600;
}
.stt-card__title {
  font-family: var(--font-sans);
  font-size: var(--svg-card-font, 9px);
  fill: var(--text);
}
.stt-card-group {
  cursor: pointer;
  transition: opacity 0.15s;
}
.stt-card-group:hover rect:first-child {
  filter: brightness(0.97);
}
.stt-card-group.is-faded {
  opacity: 0.1;
  pointer-events: none;
}
.stt-stem.is-faded {
  opacity: 0.07;
}
.stt-collapsed-line {
  stroke: #94A3B8;
  stroke-width: 2;
}
.stt-collapsed-conn {
  fill: none;
  stroke-width: 1.2;
  stroke-dasharray: 4,3;
  pointer-events: none;
  transition: opacity 0.22s;
}

/* ================================================================
   EDIT MODE
================================================================ */

/* Pencil edit button in panel header */
.stt-panel__edit-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 4px;
  transition: color 0.15s, background 0.15s;
  flex-shrink: 0;
}
.stt-panel__edit-btn:hover {
  color: var(--text);
  background: var(--surface-raised);
}
.stt-panel__edit-btn.is-active {
  color: var(--accent);
}

/* Export badge button */
.stt-btn--export {
  font-size: 0.7rem;
  opacity: 0.8;
}

/* Edit form — replaces panel body when active */
.stt-edit-form {
  flex: 1;
  overflow-y: auto;
  padding: 14px 16px 80px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--surface);
  font-family: var(--font-sans);
}
.stt-edit-form[hidden] { display: none; }

.stt-edit-section {
  border-top: 1px solid var(--border);
  padding-top: 10px;
  margin-top: 4px;
}
.stt-edit-section-title {
  font-size: 0.65rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.stt-edit-field {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.stt-edit-field label {
  font-size: 0.68rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.stt-edit-field input,
.stt-edit-field textarea,
.stt-edit-field select {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  color: var(--text);
  width: 100%;
  box-sizing: border-box;
  transition: border-color 0.15s;
}
.stt-edit-field input:focus,
.stt-edit-field textarea:focus,
.stt-edit-field select:focus {
  outline: none;
  border-color: var(--accent);
}
.stt-edit-field textarea {
  resize: vertical;
  min-height: 64px;
}
.stt-edit-field-hint {
  font-size: 0.62rem;
  color: var(--text-muted);
  opacity: 0.75;
}
.stt-edit-field-error {
  font-size: 0.65rem;
  color: #e74c3c;
}

/* Track field with live color swatch */
.stt-edit-track-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.stt-edit-track-row select {
  flex: 1;
}
.stt-edit-track-swatch {
  width: 18px;
  height: 18px;
  border-radius: 3px;
  flex-shrink: 0;
  border: 1px solid rgba(0,0,0,.15);
  transition: background .15s;
}

/* Two fields in a row */
.stt-edit-row2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

/* Dynamic rows (links, media) */
.stt-edit-dyn-row {
  display: grid;
  gap: 4px;
  align-items: start;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 6px 8px;
  position: relative;
}
.stt-edit-dyn-row--link  { grid-template-columns: 1fr 2fr auto; }
.stt-edit-dyn-row--media { grid-template-columns: 80px 2fr 1fr auto; }
.stt-edit-dyn-row input,
.stt-edit-dyn-row select {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  padding: 4px 6px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--bg);
  color: var(--text);
  box-sizing: border-box;
  width: 100%;
}
.stt-edit-dyn-row input:focus,
.stt-edit-dyn-row select:focus {
  outline: none;
  border-color: var(--accent);
}
.stt-edit-dyn-remove {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 2px 4px;
  border-radius: 3px;
  align-self: center;
}
.stt-edit-dyn-remove:hover { color: #e74c3c; }

.stt-edit-add-btn {
  font-size: 0.7rem;
  color: var(--accent);
  background: transparent;
  border: 1px dashed var(--accent);
  border-radius: 4px;
  padding: 4px 10px;
  cursor: pointer;
  width: 100%;
  text-align: center;
  transition: background 0.15s;
}
.stt-edit-add-btn:hover { background: color-mix(in srgb, var(--accent) 10%, transparent); }

/* Actions bar (sticky bottom) */
.stt-edit-actions {
  position: sticky;
  bottom: 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 10px 0 4px;
  display: flex;
  gap: 8px;
  margin-top: auto;
}
.stt-edit-actions .stt-btn--primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  flex: 1;
}
.stt-edit-actions .stt-btn--primary:hover {
  opacity: 0.88;
}

/* Export/Reset mini-bar */
.stt-edit-data-bar {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 6px 16px;
  border-top: 1px solid var(--border);
  font-size: 0.68rem;
  color: var(--text-muted);
  flex-shrink: 0;
}
.stt-edit-data-bar button {
  font-size: 0.68rem;
  padding: 3px 8px;
}

/* ================================================================
   SESSION-MANAGER-MODAL
================================================================ */

.stt-session-mgr__hint {
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 14px;
}
.stt-session-mgr__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 55vh;
  overflow-y: auto;
  padding-right: 4px;
}
.stt-session-mgr__row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
}
.stt-session-mgr__row-fields {
  display: grid;
  grid-template-columns: 2fr 110px 2fr;
  gap: 6px;
}
.stt-session-mgr__row-fields input {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  width: 100%;
}
.stt-session-mgr__row-fields input:focus {
  outline: none;
  border-color: var(--accent);
}
.stt-session-mgr__row-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}
.stt-session-mgr__count {
  font-size: 0.68rem;
  color: var(--muted);
  font-family: var(--font-mono);
  margin-right: auto;
}
.stt-session-mgr__save {
  font-size: 0.72rem;
  padding: 3px 10px;
}
.stt-btn--danger {
  font-size: 0.78rem;
  padding: 3px 8px;
  color: #c0392b;
  border: 1px solid #c0392b28;
  border-radius: var(--radius);
}
.stt-btn--danger:hover {
  background: #c0392b14;
  border-color: #c0392b;
}
.stt-session-mgr__add {
  margin-top: 12px;
}
.stt-session-mgr__add .stt-btn {
  width: 100%;
  font-size: 0.78rem;
  padding: 7px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--muted);
  transition: color 0.15s, border-color 0.15s;
}
.stt-session-mgr__add .stt-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ================================================================
   SESSION-EDIT-MODE
================================================================ */

/* Präsentieren-Button im Header */
.stt-btn--pres {
  background: color-mix(in srgb, #2980B9 12%, transparent);
  color: #2980B9;
  border: 1px solid currentColor;
}
.stt-btn--pres:hover {
  background: color-mix(in srgb, #2980B9 22%, transparent);
}

/* Cursor im Edit-Mode */
body.stt-session-edit-mode .stt-event { cursor: crosshair; }

/* Edit-Button: aktiv-Zustand */
#stt-session-edit-btn.is-active {
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  color: var(--accent);
  border-color: var(--accent);
}

/* Events im Edit-Mode: in Session */
.stt-ev-in-session {
  stroke: white !important;
  stroke-width: 3 !important;
  stroke-dasharray: none !important;
  filter: none !important;
}

/* Events im Edit-Mode: nicht in Session */
.stt-ev-out-session {
  opacity: 0.35;
}

/* ================================================================
   PRÄSENTATIONS-MODUS
================================================================ */

.stt-pres-overlay {
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: rgba(0, 0, 0, 0.40);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
}
.stt-pres-overlay[hidden] { display: none; }

.stt-pres-card {
  position: relative;
  background: var(--surface);
  color: var(--text);
  width: clamp(560px, 85vw, 1240px);
  max-height: 97vh;
  overflow-y: auto;
  border-radius: var(--radius-lg);
  padding: 0 36px 28px;
  box-shadow: 0 32px 96px rgba(0,0,0,0.28), 0 2px 8px rgba(0,0,0,0.08);
  border: 1px solid var(--border);
  display: grid;
  /* two-column layout: text (left) + gallery (right) */
  grid-template-columns: 1fr 340px;
  grid-template-rows: auto auto auto 1fr auto auto auto;
  grid-template-areas:
    "bar      bar"
    "header   header"
    "title    gallery"
    "sub      gallery"
    "desc     gallery"
    "conns    gallery"
    "footer   footer";
  column-gap: 32px;
  row-gap: 10px;
}

/* Track-Farbstreifen oben */
.stt-pres-trackbar {
  grid-area: bar;
  position: sticky;
  top: 0;
  height: 5px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  margin: 0 -36px;
  flex-shrink: 0;
  z-index: 1;
}

/* Header-Zeile */
.stt-pres-header {
  grid-area: header;
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 22px;
  flex-wrap: wrap;
}
.stt-pres-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  flex-shrink: 0;
}
.stt-pres-year {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
}
.stt-pres-badge {
  font-size: 0.7rem;
  padding: 2px 9px;
  border-radius: 100px;
  font-family: var(--font-mono);
}
.stt-pres-scope-toggle {
  margin-left: auto;
  font-size: 0.7rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 3px 9px;
  background: transparent;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.stt-pres-scope-toggle:hover {
  color: var(--text);
  background: var(--bg);
  border-color: var(--muted);
}
.stt-pres-close {
  grid-area: unset;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--muted);
  padding: 2px 6px;
  border-radius: var(--radius);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}
.stt-pres-close:hover { color: var(--text); background: var(--bg); }

/* Titel + Untertitel */
.stt-pres-title {
  grid-area: title;
  font-size: clamp(1.5rem, 2.8vw, 2.6rem);
  font-family: var(--font-sans);
  font-weight: 600;
  line-height: 1.18;
  color: var(--text);
  margin: 0;
  align-self: start;
}
.stt-pres-subtitle {
  grid-area: sub;
  font-size: 0.95rem;
  color: var(--muted);
  font-style: italic;
  margin: 0;
  align-self: start;
}

/* Galerie im Overlay — rechte Spalte, übergreift mehrere Zeilen */
.stt-pres-gallery {
  grid-area: gallery;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg);
  border: 1px solid var(--border);
  align-self: start;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 12px;
  max-height: calc(97vh - 100px);
}
.stt-pres-gallery[hidden] {
  /* Wenn keine Galerie: Text nutzt volle Breite */
  display: none;
}
/* Kein Bild → einspaltiges Layout */
.stt-pres-card:has(.stt-pres-gallery[hidden]) {
  grid-template-columns: 1fr;
  grid-template-areas:
    "bar"
    "header"
    "title"
    "sub"
    "desc"
    "conns"
    "footer";
}
.stt-pres-gallery__img {
  width: 100%;
  max-height: calc(97vh - 200px);
  object-fit: contain;
  display: block;
  background: var(--bg);
}
.stt-pres-gallery__video {
  width: 100%;
  aspect-ratio: 16/9;
  border: none;
  display: block;
}
.stt-pres-gallery__caption {
  font-size: 0.65rem;
  color: var(--muted);
  padding: 7px 10px;
  font-family: var(--font-mono);
  border-top: 1px solid var(--border);
  background: var(--surface);
}

/* Beschreibung */
.stt-pres-desc {
  grid-area: desc;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text);
  align-self: start;
}

/* Verbindungen */
.stt-pres-connections {
  grid-area: conns;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  align-self: start;
  padding-bottom: 4px;
}
.stt-pres-connections[hidden] { display: none; }

/* Footer: Navigation */
.stt-pres-footer {
  grid-area: footer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.stt-pres-footer .stt-btn {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  font-size: 0.82rem;
  padding: 7px 20px;
  border-radius: var(--radius);
  transition: background 0.15s, border-color 0.15s;
}
.stt-pres-footer .stt-btn:hover:not(:disabled) {
  background: var(--border);
  border-color: var(--muted);
}
.stt-pres-footer .stt-btn:disabled { opacity: 0.3; cursor: default; }
.stt-pres-counter {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--muted);
}

/* Timeline abgedunkelt wenn Präsentation aktiv */
#stt-svg.stt-pres-active { opacity: 0.18; }

/* Pulsierendes Highlight für das aktive Event in der Präsentation */
.stt-ev-presenting {
  animation: stt-pulse 1.6s ease-in-out infinite;
}
@keyframes stt-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.45; }
}

@media (prefers-reduced-motion: reduce) {
  .stt-ev-presenting { animation: none; }
}

/* Schmale Screens: einspaltiges Layout */
@media (max-width: 780px) {
  .stt-pres-card {
    grid-template-columns: 1fr;
    grid-template-areas:
      "bar"
      "header"
      "title"
      "sub"
      "gallery"
      "desc"
      "conns"
      "footer";
    width: 96vw;
    padding: 0 18px 20px;
  }
  .stt-pres-gallery { position: static; max-height: 240px; }
  .stt-pres-title { font-size: clamp(1.2rem, 5vw, 1.8rem); }
}

/* ── Fullscreen ──────────────────────────────────────────────────── */
.stt-btn--fs {
  padding: 5px 8px;
  line-height: 1;
}
:fullscreen .stt-header {
  --header-h: 50px;
  padding-block: 0;
}