/* ===========================
   Reset & CSS Variables
   =========================== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --accent:  #333333;
  --muted:   #888888;
  --light:   #f5f5f5;
  --white:   #ffffff;
  --glass:   rgba(255, 255, 255, 0.85);
  --border:  rgba(0, 0, 0, 0.12);

  --red:     #e03030;
  --blue:    #1a73e8;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--white);
  font-family: 'Helvetica Neue', 'Hiragino Sans', Arial, sans-serif;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

/* ===========================
   Face Auth Screen
   =========================== */
#face-screen {
  position: fixed;
  inset: 0;
  background: #000;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
}
#face-screen.hidden { display: none; }

#face-container {
  position: relative;
  width: min(360px, 90vw);
  aspect-ratio: 3/4;
}

#face-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 16px;
  transform: scaleX(-1); /* 鏡像 */
}

#face-canvas {
  display: none;
}

#face-frame {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.face-corner {
  position: absolute;
  width: 24px;
  height: 24px;
  border-color: #fff;
  border-style: solid;
  opacity: 0.9;
}
.face-corner.tl { top: 12px;  left: 12px;  border-width: 3px 0 0 3px; border-radius: 4px 0 0 0; }
.face-corner.tr { top: 12px;  right: 12px; border-width: 3px 3px 0 0; border-radius: 0 4px 0 0; }
.face-corner.bl { bottom: 12px; left: 12px;  border-width: 0 0 3px 3px; border-radius: 0 0 0 4px; }
.face-corner.br { bottom: 12px; right: 12px; border-width: 0 3px 3px 0; border-radius: 0 0 4px 0; }

#face-status {
  position: absolute;
  bottom: 20px;
  left: 0; right: 0;
  text-align: center;
  color: #fff;
  font-size: 14px;
  letter-spacing: 1px;
  padding: 8px 16px;
  text-shadow: 0 1px 4px rgba(0,0,0,0.8);
}

#face-name-form {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.75);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 32px 24px;
}
#face-name-form.hidden { display: none; }

#face-name-form p {
  color: #fff;
  font-size: 15px;
  text-align: center;
  line-height: 1.6;
}

#face-name-input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 8px;
  background: rgba(255,255,255,0.1);
  color: #fff;
  font-size: 16px;
  text-align: center;
  outline: none;
}
#face-name-input::placeholder { color: rgba(255,255,255,0.4); }
#face-name-input:focus { border-color: rgba(255,255,255,0.7); }

#face-name-btn {
  width: 100%;
  padding: 13px;
  background: #fff;
  color: #111;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}
#face-name-btn:active { opacity: 0.8; }

/* ===========================
   Setup Screen
   =========================== */
#setup-screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  z-index: 200;
}
#setup-screen.hidden { display: none; }

/* ===========================
   Main App
   =========================== */
#app {
  position: fixed;
  inset: 0;
}
#app.hidden { display: none; }

#ar-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
#ar-video.hidden { display: none; }

#canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 1;
}

/* ===========================
   AR Button (top-left)
   =========================== */
#ar-btn {
  position: fixed;
  top: max(20px, env(safe-area-inset-top, 20px));
  left: 20px;
  width: 52px;
  height: 60px;
  border-radius: 12px;
  background: var(--glass);
  border: 1px solid var(--border);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  z-index: 50;
  -webkit-tap-highlight-color: transparent;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background 0.2s, box-shadow 0.2s;
  padding: 0;
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}
.ar-icon {
  width: 28px;
  height: 28px;
  color: var(--muted);
  transition: color 0.2s;
}
.ar-status {
  font-size: 8px;
  letter-spacing: 1px;
  color: var(--muted);
  font-family: 'Helvetica Neue', Arial, sans-serif;
}

#ar-btn.active {
  background: #e8f0fe;
  border-color: var(--blue);
}
#ar-btn.active .ar-icon  { color: var(--blue); }
#ar-btn.active .ar-status { color: var(--blue); }

/* ===========================
   Loading Screen
   =========================== */
#loading-screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  z-index: 10;
  pointer-events: none;
  background: var(--white);
  transition: opacity 0.8s;
}
#loading-screen.done { opacity: 0; }

.loading-text {
  font-size: 11px;
  letter-spacing: 4px;
  color: var(--muted);
  animation: blink 1s step-end infinite;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.3; }
}

.loading-bar {
  width: 160px;
  height: 2px;
  background: rgba(0,0,0,0.08);
  border-radius: 2px;
  overflow: hidden;
}
#loading-progress {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.3s ease;
}

/* ===========================
   Mic Button
   =========================== */
#mic-btn {
  position: fixed;
  top: max(24px, env(safe-area-inset-top, 24px));
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--glass);
  border: 1px solid var(--border);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  -webkit-tap-highlight-color: transparent;
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
  transition: transform 0.15s;
}
#mic-btn:active { transform: scale(0.92); }

.mic-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--border);
  pointer-events: none;
  animation: ring-idle 2.5s ease-in-out infinite;
}
.mic-ring-inner { width: 56px; height: 56px; }
.mic-ring-outer {
  width: 74px;
  height: 74px;
  animation-delay: 0.6s;
  border-color: rgba(0,0,0,0.06);
}
@keyframes ring-idle {
  0%, 100% { transform: scale(1);    opacity: 0.6; }
  50%       { transform: scale(1.04); opacity: 1;   }
}

.mic-icon {
  width: 22px;
  height: 22px;
  color: var(--accent);
  position: relative;
  z-index: 1;
  transition: color 0.3s;
}
.mic-glow { display: none; }

/* Listening state */
#mic-btn.listening .mic-ring-inner {
  animation: ring-active 0.6s ease-in-out infinite;
  border-color: rgba(224, 48, 48, 0.5);
}
#mic-btn.listening .mic-ring-outer {
  border-color: rgba(224, 48, 48, 0.2);
}
#mic-btn.listening .mic-icon { color: var(--red); }

@keyframes ring-active {
  0%, 100% { transform: scale(1);    opacity: 1; }
  50%       { transform: scale(1.12); opacity: 0.8; }
}

/* Processing state */
#mic-btn.processing .mic-ring-inner {
  animation: ring-spin 1.2s linear infinite;
  border-color: rgba(26, 115, 232, 0.5);
  border-top-color: var(--blue);
}
#mic-btn.processing .mic-ring-outer { opacity: 0.2; }
#mic-btn.processing .mic-icon { color: var(--blue); }

@keyframes ring-spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* ===========================
   Status Bar
   =========================== */
#status-bar {
  position: fixed;
  bottom: max(28px, env(safe-area-inset-bottom, 28px));
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  z-index: 50;
  pointer-events: none;
}

.status-line {
  width: 20px;
  height: 1px;
  background: var(--border);
}

#status-text {
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--muted);
  transition: color 0.3s;
}

/* ===========================
   Message Box
   =========================== */
#message-box {
  position: fixed;
  bottom: max(72px, env(safe-area-inset-bottom, 72px));
  left: 20px;
  right: 20px;
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 18px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 50;
  max-height: 180px;
  overflow-y: auto;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  animation: msg-in 0.3s ease;
}
#message-box.hidden { display: none; }

@keyframes msg-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.message-corner { display: none; }

#message-text {
  font-size: 13px;
  line-height: 1.7;
  color: var(--accent);
  word-break: break-word;
}

/* ===========================
   Manual Overlay
   =========================== */
#manual-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255, 255, 255, 0.92);
  z-index: 150;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  animation: fade-in 0.3s ease;
}
#manual-overlay.hidden { display: none; }

@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.manual-container {
  width: min(400px, 92vw);
  max-height: 82vh;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 24px rgba(0,0,0,0.12);
}

.manual-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}
.manual-title {
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--accent);
  font-weight: 600;
}
.manual-header button {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 16px;
  cursor: pointer;
  padding: 4px 8px;
  transition: color 0.2s;
}
.manual-header button:hover { color: var(--accent); }

.manual-content {
  padding: 24px 20px;
  overflow-y: auto;
  color: var(--accent);
  font-size: 13px;
  line-height: 1.85;
  -webkit-overflow-scrolling: touch;
}
.manual-content h3 {
  font-size: 11px;
  letter-spacing: 1.5px;
  color: var(--accent);
  margin: 20px 0 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
  text-transform: uppercase;
}
.manual-content h3:first-child { margin-top: 0; }
.manual-content p  { margin-bottom: 10px; color: #444; }
.manual-content strong { color: var(--accent); }