/* Shared interactive layer for browser presentations. */
:root {
  --interaction-bg: rgba(17, 18, 23, .94);
  --interaction-surface: rgba(255, 255, 255, .08);
  --interaction-line: rgba(255, 255, 255, .14);
  --interaction-text: #fff8f4;
  --interaction-muted: #cfc3bd;
  --interaction-accent: #f0c2aa;
  --interaction-success: #5bc28a;
  --interaction-danger: #e06a6a;
}

.presentation-shell {
  position: fixed;
  inset: 0;
  overflow: hidden;
  background: #1b191a;
}

.presentation-frame {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
  background: #1b191a;
}

.interaction-toggle {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 50;
  min-height: 48px;
  padding: 0 17px;
  border: 1px solid var(--interaction-line);
  border-radius: 15px;
  color: #251e1b;
  background: linear-gradient(145deg, #f5d2bf, #dfa991);
  box-shadow: 0 16px 45px rgba(0,0,0,.34);
  cursor: pointer;
  font: 850 .88rem/1 Inter, system-ui, sans-serif;
}

.interaction-panel {
  position: fixed;
  right: 18px;
  bottom: 78px;
  z-index: 49;
  width: min(390px, calc(100vw - 36px));
  max-height: min(720px, calc(100vh - 110px));
  overflow: auto;
  padding: 18px;
  border: 1px solid var(--interaction-line);
  border-radius: 22px;
  color: var(--interaction-text);
  background: var(--interaction-bg);
  box-shadow: 0 22px 70px rgba(0,0,0,.45);
  backdrop-filter: blur(18px);
  transform: translateY(16px) scale(.97);
  transform-origin: right bottom;
  opacity: 0;
  visibility: hidden;
  transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
  font-family: Inter, system-ui, sans-serif;
}

.interaction-panel.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.interaction-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 15px;
}

.interaction-header small,
.interaction-header strong { display: block; }
.interaction-header small {
  margin-bottom: 4px;
  color: var(--interaction-accent);
  font-size: .68rem;
  font-weight: 900;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.interaction-header strong { font-size: 1rem; line-height: 1.25; }

.interaction-close {
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  border: 1px solid var(--interaction-line);
  border-radius: 10px;
  color: var(--interaction-text);
  background: rgba(255,255,255,.06);
  cursor: pointer;
}

.interaction-section {
  padding: 14px 0;
  border-top: 1px solid var(--interaction-line);
}
.interaction-section:first-of-type { border-top: 0; padding-top: 0; }
.interaction-section h2 {
  margin: 0 0 8px;
  font-size: .95rem;
}
.interaction-section p {
  margin: 0 0 12px;
  color: var(--interaction-muted);
  font-size: .82rem;
  line-height: 1.5;
}

.interaction-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 9px;
}

.interaction-action,
.vote-option,
.quiz-option {
  min-height: 42px;
  border: 1px solid var(--interaction-line);
  border-radius: 12px;
  color: var(--interaction-text);
  background: var(--interaction-surface);
  cursor: pointer;
  font: 800 .78rem/1.2 Inter, system-ui, sans-serif;
  transition: transform .16s ease, background .16s ease, border-color .16s ease;
}
.interaction-action:hover,
.vote-option:hover,
.quiz-option:hover {
  transform: translateY(-1px);
  border-color: rgba(240,194,170,.55);
  background: rgba(255,255,255,.13);
}
.interaction-action.is-active {
  color: #251e1b;
  border-color: transparent;
  background: var(--interaction-accent);
}

.reveal-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 9px;
}
.reveal-status {
  min-height: 42px;
  display: flex;
  align-items: center;
  padding: 0 12px;
  border: 1px solid var(--interaction-line);
  border-radius: 12px;
  color: var(--interaction-muted);
  background: rgba(0,0,0,.16);
  font-size: .76rem;
}

.audience-question {
  padding: 13px;
  border: 1px solid rgba(240,194,170,.34);
  border-radius: 14px;
  background: rgba(240,194,170,.07);
}
.audience-question strong {
  display: block;
  margin-bottom: 6px;
  color: var(--interaction-accent);
  font-size: .86rem;
}
.audience-question span {
  color: var(--interaction-text);
  font-size: .84rem;
  line-height: 1.45;
}

.vote-list,
.quiz-list {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}
.vote-option,
.quiz-option {
  display: grid;
  grid-template-columns: minmax(0,1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  text-align: left;
}
.vote-count {
  min-width: 31px;
  height: 27px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  color: #251e1b;
  background: var(--interaction-accent);
  font-size: .78rem;
}
.quiz-option.is-correct {
  border-color: rgba(91,194,138,.75);
  background: rgba(91,194,138,.18);
}
.quiz-option.is-wrong {
  border-color: rgba(224,106,106,.75);
  background: rgba(224,106,106,.16);
}
.interaction-feedback {
  min-height: 22px;
  margin-top: 9px;
  color: var(--interaction-muted);
  font-size: .78rem;
  line-height: 1.4;
}

.interaction-shortcuts {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}
.interaction-shortcuts span {
  padding: 5px 8px;
  border: 1px solid var(--interaction-line);
  border-radius: 8px;
  color: var(--interaction-muted);
  background: rgba(255,255,255,.04);
  font-size: .68rem;
}

.confetti-canvas {
  position: fixed;
  inset: 0;
  z-index: 60;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.interaction-toast {
  position: fixed;
  left: 50%;
  top: 20px;
  z-index: 70;
  max-width: min(560px, calc(100vw - 32px));
  padding: 12px 16px;
  border: 1px solid var(--interaction-line);
  border-radius: 13px;
  color: var(--interaction-text);
  background: rgba(17,18,23,.92);
  box-shadow: 0 16px 45px rgba(0,0,0,.32);
  transform: translate(-50%, -16px);
  opacity: 0;
  visibility: hidden;
  transition: .2s ease;
  font: 800 .82rem/1.35 Inter, system-ui, sans-serif;
}
.interaction-toast.is-visible {
  transform: translate(-50%, 0);
  opacity: 1;
  visibility: visible;
}

@media (max-width: 620px) {
  .interaction-toggle { right: 12px; bottom: 12px; }
  .interaction-panel { right: 12px; bottom: 70px; width: calc(100vw - 24px); }
}

@media print {
  .interaction-toggle,
  .interaction-panel,
  .confetti-canvas,
  .interaction-toast { display: none !important; }
}

@media (prefers-reduced-motion: reduce) {
  .interaction-panel,
  .interaction-toast { transition: none !important; }
}