/* MAS S60 — Digital Self. White, minimal: the chrome head stands on the
 * bottom edge of the screen; page background matches the clip's pure white. */

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #ffffff;
  color: #2a3a47;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

#face {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* video face layers (FaceVideo), crossfaded by toggling .front.
 * Full height, bottom flush with the viewport bottom, centered. */
.face-video {
  position: fixed;
  bottom: 0;
  left: 50%;
  height: 100vh;
  transform: translateX(-50%);
  opacity: 0;
  transition: opacity 0.45s ease;
  pointer-events: none;
}
.face-video.front { opacity: 1; }

/* subtitle: only visible while the agent speaks, then fades */
#subtitle {
  position: fixed;
  bottom: 12vh;
  left: 50%;
  transform: translateX(-50%);
  max-width: 60ch;
  text-align: center;
  font-size: 18px;
  line-height: 1.5;
  color: #54687a;
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
  text-shadow: 0 1px 8px rgba(255, 255, 255, 0.9);
}
#subtitle.visible { opacity: 1; }

/* input bar: hidden until a key is pressed or the face is clicked */
#input-bar {
  position: fixed;
  bottom: 5vh;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 10px;
  opacity: 0;
  transition: opacity 0.4s ease;
}
#input-bar.visible { opacity: 1; }
#input-bar.hidden { display: none; }

#query {
  width: min(520px, 70vw);
  padding: 10px 16px;
  font-size: 16px;
  color: #1a2733;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid #b8c8d4;
  border-radius: 22px;
  outline: none;
  box-shadow: 0 2px 14px rgba(42, 58, 71, 0.08);
}
#query:focus { border-color: #0891b2; }

#mic-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid #b8c8d4;
  background: rgba(255, 255, 255, 0.92);
  color: #0891b2;
  font-size: 14px;
  cursor: pointer;
}
#mic-btn.listening { color: #ef5350; border-color: #ef5350; }

/* memory panel: documents the agent "pulls out" of its memory */
#memory-panel {
  position: fixed;
  top: 6vh;
  right: 4vw;
  bottom: 6vh;
  width: min(560px, 44vw);
  background: rgba(12, 18, 24, 0.94);
  border: 1px solid #27404f;
  border-radius: 10px;
  box-shadow: 0 0 40px rgba(9, 30, 45, 0.25);
  display: flex;
  flex-direction: column;
  transform: translateX(0);
  transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.5s ease;
  z-index: 10;
}
#memory-panel.hidden {
  transform: translateX(60vw);
  opacity: 0;
  pointer-events: none;
}

#memory-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  border-bottom: 1px solid #1d2c38;
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #4fc3f7;
}

#memory-close {
  background: none;
  border: none;
  color: #9fb3c8;
  font-size: 22px;
  cursor: pointer;
}

#memory-content {
  padding: 18px 22px;
  overflow-y: auto;
  font-size: 15px;
  line-height: 1.65;
  color: #cfd8dc;
}
#memory-content h1, #memory-content h2, #memory-content h3 {
  color: #dfe9f0;
  margin: 0.9em 0 0.4em;
}
#memory-content h1 { font-size: 22px; }
#memory-content h2 { font-size: 18px; }
#memory-content h3 { font-size: 16px; }
#memory-content p { margin: 0.6em 0; }
#memory-content ul, #memory-content ol { margin: 0.6em 0 0.6em 1.4em; }
#memory-content a { color: #4fc3f7; }
#memory-content code {
  background: #141c24;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
}
#memory-content pre {
  background: #141c24;
  padding: 12px;
  border-radius: 6px;
  overflow-x: auto;
  margin: 0.8em 0;
}
#memory-content pre code { padding: 0; background: none; }
#memory-content img { max-width: 100%; border-radius: 6px; }
#memory-content hr { border: none; border-top: 1px solid #1d2c38; margin: 1.2em 0; }

/* grader fallback: plain index overlay */
#index-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 7, 10, 0.96);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
}
#index-overlay.hidden { display: none; }
#index-inner { max-width: 640px; width: 90%; }
#index-inner h1 {
  font-size: 28px;
  color: #4fc3f7;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 24px;
}
#index-list a {
  display: block;
  padding: 12px 4px;
  color: #dfe9f0;
  text-decoration: none;
  border-bottom: 1px solid #1d2c38;
  font-size: 17px;
}
#index-list a:hover { color: #4fc3f7; }
#index-list .section-label {
  margin-top: 22px;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #607d8b;
}
.index-hint { margin-top: 28px; font-size: 12px; color: #546e7a; }

/* tiny dot bottom-right: the only permanent UI element */
#index-dot {
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: none;
  background: #94a9bb;
  cursor: pointer;
  opacity: 0.7;
  z-index: 15;
}
#index-dot:hover { background: #0891b2; opacity: 1; }