:root {
  --bg: #f3f3f3;
  --surface: #ffffff;
  --surface-muted: #e6e6e6;
  --surface-strong: #d9d9d9;
  --text: #1f1f1f;
  --muted: #5f5f5f;
  --accent: #0078d4;
  --accent-strong: #005a9e;
  --danger: #c50f1f;
  --ok: #107c10;
  --border: #c8c8c8;
  --border-strong: #9a9a9a;
  --radius: 0;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  min-height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

body.audience-mode {
  overflow: hidden;
  background: #000;
}

body.audience-mode .app,
body.audience-mode .main-view,
body.audience-mode .audience-view {
  width: 100vw;
  height: 100vh;
}

body.audience-mode .main-view {
  padding: 0;
}

button,
input,
textarea,
select {
  font: inherit;
}

.hidden {
  display: none !important;
}

.app {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  height: 100vh;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.brand h1,
.brand p {
  margin: 0;
}

.brand h1 {
  font-size: 1.4rem;
  font-weight: 300;
  letter-spacing: 0.01em;
}

.brand p {
  color: var(--muted);
  font-size: 0.88rem;
}

.version-badge {
  display: inline-block;
  margin-left: 0.45rem;
  padding: 0.08rem 0.35rem;
  background: var(--surface-muted);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.78rem;
  vertical-align: middle;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  background: var(--accent);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.topbar-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem;
}

button,
.file-picker span {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 0.7rem 1rem;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease, color 120ms ease;
}

button:hover,
.file-picker span:hover {
  background: var(--surface-muted);
  border-color: var(--border-strong);
}

button:focus-visible,
.file-picker input:focus-visible + span {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.file-picker {
  position: relative;
  display: inline-flex;
}

.file-picker input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.main-view {
  position: relative;
  min-height: 0;
  overflow: hidden;
  padding: 1rem;
}

.loading-overlay {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: rgba(243, 243, 243, 0.96);
}

.loading-card {
  width: min(520px, 100%);
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
}

.loading-label,
.loading-detail {
  margin: 0;
}

.loading-label {
  font-size: 1.05rem;
  font-weight: 400;
}

.loading-detail {
  margin-top: 0.75rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.loading-bar {
  margin-top: 1rem;
  width: 100%;
  height: 10px;
  overflow: hidden;
  background: var(--surface-muted);
}

.loading-bar-fill {
  width: 0%;
  height: 100%;
  background: var(--accent);
  transition: width 140ms ease;
}

.empty-state {
  display: grid;
  place-items: center;
  height: 100%;
  overflow: auto;
}

.empty-card {
  width: min(900px, 100%);
  padding: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
}

.eyebrow {
  margin: 0 0 0.4rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  font-weight: 600;
}

.empty-card h2 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.05;
  font-weight: 300;
}

.empty-card p {
  color: var(--muted);
  font-size: 1rem;
  max-width: 44rem;
}

.hero-picker {
  margin-top: 1rem;
}

.hero-picker span {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

.hero-picker span:hover {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
}

.shortcut-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  margin-top: 1.5rem;
  color: var(--muted);
}

kbd {
  padding: 0.18rem 0.42rem;
  background: var(--surface-muted);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.9em;
}

.presenter-view {
  --sidebar-width: 360px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 8px minmax(280px, var(--sidebar-width));
  gap: 1rem;
  height: 100%;
  min-height: 0;
}

.stage-panel,
.sidebar,
.overview-view,
.help-view {
  min-width: 0;
  min-height: 0;
}

.sidebar {
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  gap: 1rem;
}

.presenter-splitter {
  position: relative;
  cursor: col-resize;
  touch-action: none;
  background: var(--surface-strong);
  border: 1px solid var(--border);
}

.presenter-splitter::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  transform: translateX(-50%);
  background: var(--border-strong);
}

.presenter-splitter:hover,
.presenter-splitter:focus-visible,
body.resizing-split .presenter-splitter {
  background: #d0d0d0;
}

.meta-bar,
.notes-panel,
.slide-stage,
.overview-view,
.help-view {
  background: var(--surface);
  border: 1px solid var(--border);
}

.meta-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.9rem 1rem;
}

.timer,
.page-indicator {
  font-family: "Consolas", "Cascadia Mono", "Segoe UI Mono", monospace;
}

.timer {
  font-size: clamp(1.4rem, 4vw, 2.4rem);
  cursor: pointer;
}

.page-indicator {
  font-size: 1rem;
  color: var(--muted);
}

.slide-stage {
  position: relative;
  overflow: hidden;
  display: grid;
  place-items: center;
}

.current-stage {
  height: 100%;
  min-height: 0;
  padding: 1rem;
}

.next-stage {
  aspect-ratio: 16 / 9;
  max-height: 30vh;
  padding: 0.5rem;
}

.audience-stage {
  width: 100vw;
  height: 100vh;
  background: #000;
  border: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.audience-stage img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  background: #000;
}

.slide-stage img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  background: #000;
}

.video-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.video-layer video {
  position: absolute;
  object-fit: contain;
  pointer-events: auto;
  background: #000;
}

.notes-panel {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  min-height: 0;
}

.notes-header,
.overview-header,
.help-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1rem 0.75rem;
  color: var(--muted);
}

.notes {
  margin: 0;
  padding: 0 1rem 1rem;
  white-space: pre-wrap;
  overflow: auto;
  font-size: 1.2rem;
  line-height: 1.45;
  color: var(--text);
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

.status-text {
  font-size: 0.88rem;
}

.overview-view {
  height: 100%;
  min-height: 0;
  padding: 1rem;
  overflow: auto;
}

.overview-header,
.help-header {
  padding: 0 0 1rem;
}

.overview-header h2,
.help-header h2 {
  margin: 0;
  font-size: 1.3rem;
  font-weight: 400;
}

.help-view {
  height: 100%;
  min-height: 0;
  padding: 1rem;
  overflow: auto;
}

.help-grid {
  display: grid;
  gap: 1rem;
}

.help-panel {
  padding: 1rem;
  background: var(--surface-muted);
  border: 1px solid var(--border);
}

.help-panel h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: 600;
}

.help-panel p {
  margin: 0 0 0.75rem;
  color: var(--text);
  line-height: 1.5;
}

.help-panel p:last-child {
  margin-bottom: 0;
}

.help-shortcuts {
  margin-top: 0;
}

.help-view a {
  color: var(--accent-strong);
  text-decoration: none;
}

.help-view a:hover,
.help-view a:focus-visible {
  text-decoration: underline;
}

.overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.overview-thumb {
  display: grid;
  gap: 0.55rem;
  padding: 0.7rem;
  background: var(--surface-muted);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease;
}

.overview-thumb:hover {
  background: #dddddd;
  border-color: var(--border-strong);
}

.overview-thumb img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: #fff;
  border: 1px solid var(--border);
}

.overview-thumb span {
  color: var(--muted);
  font-size: 0.9rem;
}

.pointer-dot {
  position: absolute;
  width: 16px;
  height: 16px;
  margin-left: -8px;
  margin-top: -8px;
  background: var(--danger);
  border: 2px solid #fff;
  pointer-events: none;
}

.blackout-overlay {
  position: absolute;
  inset: 0;
  background: #000;
}

@media (max-width: 980px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .topbar-actions {
    justify-content: flex-start;
  }

  .presenter-view {
    grid-template-columns: 1fr;
    height: auto;
    overflow: auto;
  }

  .presenter-splitter {
    display: none;
  }

  .current-stage {
    height: auto;
    min-height: auto;
    aspect-ratio: 16 / 9;
  }

  .sidebar {
    grid-template-rows: auto auto 280px;
  }
}