:root {
  --bg-primary:      #080c14;
  --bg-secondary:    #0d1520;
  --bg-panel:        #0a1120;
  --bg-msg-user:     #0a2040;
  --bg-msg-ai:       #0a1528;
  --accent:          #00d4ff;
  --accent-dim:      #0077aa;
  --accent-glow:     rgba(0, 212, 255, 0.15);
  --text-primary:    #c8e8f8;
  --text-dim:        #5a7a90;
  --text-danger:     #ff4466;
  --border:          #1a2d40;
  --border-accent:   rgba(0, 212, 255, 0.3);
  --radius:          6px;
  --font:            'Courier New', monospace;
}

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

html, body { height: 100%; background: var(--bg-primary); color: var(--text-primary); font-family: var(--font); font-size: 14px; overflow: hidden; }

#app { display: flex; flex-direction: column; height: 100vh; height: 100dvh; }

/* Header */
header { display: flex; align-items: center; justify-content: space-between; padding: 10px 20px; background: var(--bg-secondary); border-bottom: 1px solid var(--border-accent); flex-shrink: 0; box-shadow: 0 2px 20px rgba(0,212,255,0.05); }

header h1 { font-size: 18px; letter-spacing: 6px; color: var(--accent); text-shadow: 0 0 20px rgba(0,212,255,0.5); }

.header-left, .header-right { display: flex; align-items: center; gap: 10px; min-width: 140px; }
.header-right { justify-content: flex-end; }

#model-selector { display: flex; align-items: center; gap: 6px; }

#model-dropdown { position: relative; }

#model-search { background: var(--bg-panel); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text-primary); font-family: var(--font); font-size: 11px; padding: 5px 10px; width: 220px; outline: none; cursor: pointer; transition: border-color 0.2s; }
#model-search::placeholder { color: var(--text-dim); }
#model-search:focus { border-color: var(--accent-dim); cursor: text; }

#model-list { display: none; position: absolute; top: calc(100% + 4px); left: 0; min-width: 100%; max-width: 360px; max-height: 280px; overflow-y: auto; background: var(--bg-secondary); border: 1px solid var(--border-accent); border-radius: var(--radius); z-index: 200; box-shadow: 0 8px 24px rgba(0,0,0,0.5); }
#model-list.open { display: block; }
#model-list::-webkit-scrollbar { width: 4px; }
#model-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.model-item { padding: 7px 12px; font-size: 11px; font-family: var(--font); color: var(--text-dim); cursor: pointer; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; transition: background 0.1s, color 0.1s; }
.model-item:hover  { background: var(--accent-glow); color: var(--text-primary); }
.model-item.active { color: var(--accent); }
.model-item.no-results { color: var(--text-dim); cursor: default; font-style: italic; }

#status-dot { width: 8px; height: 8px; border-radius: 50%; background: #555; transition: background 0.3s, box-shadow 0.3s; }
#status-dot.ready    { background: var(--accent); box-shadow: 0 0 8px var(--accent); }
#status-dot.thinking { background: #ffaa00; box-shadow: 0 0 8px #ffaa00; animation: pulse 1s infinite; }
#status-dot.listening  { background: #ff4466; box-shadow: 0 0 8px #ff4466; animation: pulse 0.5s infinite; }
#status-dot.processing { background: #ffaa00; box-shadow: 0 0 8px #ffaa00; }
#status-dot.speaking { background: #44ff88; box-shadow: 0 0 8px #44ff88; animation: pulse 0.8s infinite; }
#status-dot.error    { background: #ff4466; }
#status-dot.disconnected { background: #555; }

#status-text { font-size: 11px; letter-spacing: 2px; color: var(--text-dim); }

@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.4} }

/* Main layout */
#main { display: flex; flex: 1; overflow: hidden; }

/* Chat panel */
#chat-panel { flex: 1; display: flex; flex-direction: column; overflow: hidden; border-right: 1px solid var(--border); }

#messages { flex: 1; overflow-y: auto; padding: 20px; display: flex; flex-direction: column; gap: 12px; scroll-behavior: smooth; -webkit-overflow-scrolling: touch; }
#messages::-webkit-scrollbar { width: 4px; }
#messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.message { display: flex; max-width: 82%; animation: fadeIn 0.2s ease; }
.message.user      { align-self: flex-end; flex-direction: row-reverse; }
.message.assistant { align-self: flex-start; }

@keyframes fadeIn { from{opacity:0;transform:translateY(6px)} to{opacity:1;transform:translateY(0)} }

.msg-inner { display: flex; flex-direction: column; }
.message.user .msg-inner { align-items: flex-end; }

.message-label { font-size: 10px; letter-spacing: 2px; color: var(--text-dim); margin-bottom: 4px; }

.message-bubble { padding: 10px 14px; border-radius: var(--radius); line-height: 1.6; white-space: pre-wrap; word-break: break-word; }
.message.user      .message-bubble { background: var(--bg-msg-user); border: 1px solid var(--border-accent); }
.message.assistant .message-bubble { background: var(--bg-msg-ai);  border: 1px solid var(--border); }
.message.assistant .message-bubble.streaming { border-color: var(--accent-dim); }

/* Input area */
#input-area { display: flex; align-items: center; gap: 10px; padding: 14px 20px; background: var(--bg-secondary); border-top: 1px solid var(--border); flex-shrink: 0; }

#input { flex: 1; background: var(--bg-primary); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text-primary); font-family: var(--font); font-size: 14px; padding: 8px 12px; outline: none; transition: border-color 0.2s; }
#input:focus { border-color: var(--accent-dim); }
#input::placeholder { color: var(--text-dim); }

button { cursor: pointer; font-family: var(--font); border: none; background: none; }

.btn-icon { width: 36px; height: 36px; border-radius: var(--radius); background: var(--bg-panel); border: 1px solid var(--border); color: var(--text-dim); display: flex; align-items: center; justify-content: center; transition: border-color 0.2s, color 0.2s, background 0.2s; }
.btn-icon:hover  { border-color: var(--accent-dim); color: var(--accent); }
.btn-icon.active { border-color: var(--accent); color: var(--accent); background: var(--accent-glow); }

#mic-btn { width: 40px; height: 40px; border-radius: 50%; background: var(--bg-panel); border: 1px solid var(--border); color: var(--text-dim); display: flex; align-items: center; justify-content: center; transition: all 0.2s; flex-shrink: 0; }
#mic-btn:hover { border-color: var(--accent-dim); color: var(--accent); }
#mic-btn.recording { border-color: #ff4466; color: #ff4466; background: rgba(255,68,102,0.1); box-shadow: 0 0 12px rgba(255,68,102,0.3); animation: pulse 0.5s infinite; }

#send-btn { width: 40px; height: 40px; border-radius: var(--radius); background: var(--accent-dim); color: white; display: flex; align-items: center; justify-content: center; transition: background 0.2s; flex-shrink: 0; }
#send-btn:hover { background: var(--accent); }

/* Side panel */
#side-panel { width: 300px; display: flex; flex-direction: column; overflow-y: auto; background: var(--bg-panel); flex-shrink: 0; }
#side-panel::-webkit-scrollbar { width: 4px; }
#side-panel::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.panel-section { padding: 16px; border-bottom: 1px solid var(--border); }

.panel-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.panel-header > span:first-child { font-size: 11px; letter-spacing: 3px; color: var(--accent); }

.status-badge { font-size: 10px; padding: 2px 8px; border-radius: 10px; background: var(--bg-secondary); border: 1px solid var(--border); color: var(--text-dim); }
.status-badge.configured { border-color: #44ff88; color: #44ff88; }


.btn-primary { background: var(--accent-dim); color: white; border-radius: var(--radius); padding: 7px 14px; font-size: 12px; letter-spacing: 1px; transition: background 0.2s; width: 100%; text-align: center; }
.btn-primary:hover { background: var(--accent); }
.btn-primary:disabled { background: var(--border); cursor: not-allowed; color: var(--text-dim); }

.btn-text { background: none; color: var(--text-dim); font-size: 11px; letter-spacing: 1px; padding: 4px 0; transition: color 0.2s; display: block; margin-top: 6px; }
.btn-text:hover { color: var(--text-primary); }
.btn-text.danger:hover { color: var(--text-danger); }


/* Voice section */
.hint { font-size: 11px; color: var(--text-dim); margin-bottom: 10px; line-height: 1.5; }

.file-upload-label { display: block; background: var(--bg-secondary); border: 1px dashed var(--border); border-radius: var(--radius); padding: 8px 12px; font-size: 12px; color: var(--text-dim); cursor: pointer; text-align: center; margin-bottom: 8px; transition: border-color 0.2s, color 0.2s; }
.file-upload-label:hover { border-color: var(--accent-dim); color: var(--accent); }
.file-upload-label input[type="file"] { display: none; }

.empty-state { text-align: center; color: var(--text-dim); font-size: 12px; padding: 16px; }

.speaker-row { display: flex; gap: 6px; align-items: center; margin-bottom: 8px; }
.speaker-row select { flex: 1; background: var(--bg-primary); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text-primary); font-family: var(--font); font-size: 12px; padding: 6px 8px; outline: none; }
.speaker-row select:focus { border-color: var(--accent-dim); }
.speaker-row select option { background: var(--bg-secondary); }

.voice-divider { font-size: 10px; color: var(--text-dim); letter-spacing: 1px; text-align: center; margin: 12px 0 10px; border-top: 1px solid var(--border); padding-top: 10px; }

.voice-pick-row { display: flex; gap: 6px; align-items: center; margin-bottom: 10px; }
.voice-pick-row .select-full { flex: 1; }
.select-full { background: var(--bg-primary); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text-primary); font-family: var(--font); font-size: 12px; padding: 6px 8px; outline: none; }
.select-full:focus { border-color: var(--accent-dim); }
.select-full option, .select-full optgroup { background: var(--bg-secondary); }

.rate-row { display: flex; align-items: center; gap: 8px; }
.rate-row input[type=range] { flex: 1; accent-color: var(--accent); }
.rate-row .hint { margin: 0; white-space: nowrap; }

.search-pill { background: rgba(0,212,255,0.05); border-color: var(--accent-dim) !important; color: var(--text-dim); font-size: 12px; font-style: italic; padding: 6px 12px; animation: pulse 1.2s infinite; }

/* ── Panel overlay backdrop ───────────────────────────────────────────────── */
#panel-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.55); z-index: 99; }
#panel-overlay.visible { display: block; }

/* ── Mobile ───────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  /* Side panel: full-height slide-in overlay */
  #side-panel {
    position: fixed;
    top: 0; right: 0;
    height: 100%; height: 100dvh;
    width: min(300px, 88vw);
    z-index: 100;
    transform: translateX(110%);
    transition: transform 0.25s ease;
    box-shadow: -4px 0 24px rgba(0,0,0,0.6);
  }
  #side-panel.panel-open { transform: translateX(0); }

  /* Remove desktop border-right from chat when panel is overlaid */
  #chat-panel { border-right: none; }

  /* Prevent body scroll when panel is open */
  body.panel-open { overflow: hidden; }

  /* Header: tighter on small screens */
  header { padding: 8px 14px; }
  .header-left, .header-right { min-width: unset; gap: 8px; }
  header h1 { font-size: 15px; letter-spacing: 4px; }

  /* Messages */
  #messages { padding: 14px 12px; gap: 10px; }
  .message { max-width: 92%; }

  /* Input area: safe area for iPhone home bar */
  #input-area {
    padding: 10px 12px;
    padding-bottom: calc(10px + env(safe-area-inset-bottom, 0px));
  }
  /* Prevent iOS auto-zoom on input focus (requires font-size >= 16px) */
  #input { font-size: 16px; }

  /* Larger touch targets */
  #mic-btn  { width: 46px; height: 46px; }
  #send-btn { width: 46px; height: 46px; }
  .btn-icon { width: 40px; height: 40px; }

  /* Model list: anchor to right edge so it doesn't overflow */
  #model-list { left: auto; right: 0; max-width: calc(88vw - 32px); }

  /* Model search input: full width in panel */
  #model-search { width: 100%; }
}