/* ── APP SHELL ── */
#app { display: none; height: 100vh; flex-direction: column; }
#app.on { display: flex; }

/* ── TOPBAR ── */
.topbar {
  height: 50px;
  display: flex; align-items: center;
  padding: 0 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-1);
  flex-shrink: 0;
  position: relative; z-index: 10;
}
.topbar-logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display);
  font-size: 15px; font-weight: 700;
  color: var(--green); letter-spacing: .1em;
}
.topbar-logo-dot {
  width: 8px; height: 8px;
  background: var(--green); border-radius: 50%;
  box-shadow: 0 0 8px var(--green);
  animation: pulse 2s infinite;
}
.topbar-center { flex: 1; display: flex; align-items: center; justify-content: center; gap: 20px; }
.model-badge {
  font-size: 10px; font-weight: 600;
  color: var(--amber);
  background: rgba(255,170,0,.08);
  border: 1px solid rgba(255,170,0,.2);
  padding: 5px 14px; border-radius: 2px;
  letter-spacing: .08em; text-transform: uppercase;
  cursor: pointer; transition: all .2s;
  position: relative;
}
.model-badge:hover { background: rgba(255,170,0,.15); }
.status-dot {
  width: 6px; height: 6px;
  background: var(--green); border-radius: 50%;
  box-shadow: 0 0 6px var(--green);
  animation: pulse 2s infinite;
  display: inline-block; margin-right: 6px;
}
.topbar-right { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.topbar-btn {
  background: none; border: 1px solid var(--border);
  border-radius: 2px; padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 11px; color: var(--text-2);
  cursor: pointer; transition: all .2s; letter-spacing: .05em;
}
.topbar-btn:hover { border-color: var(--border-hover); color: var(--text-1); }
.topbar-btn.danger:hover { border-color: var(--red); color: var(--red); }
.user-badge { font-size: 11px; color: var(--text-3); display: flex; align-items: center; gap: 6px; }
.user-badge span { color: var(--green); }

/* ── MODEL DROPDOWN ── */
.model-dropdown {
  position: absolute; top: 54px; left: 50%; transform: translateX(-50%);
  background: var(--bg-1);
  border: 1px solid var(--border-hover);
  border-radius: 2px; min-width: 290px;
  z-index: 200; display: none;
  animation: fadeIn .15s ease;
}
.model-dropdown.open { display: block; }
.model-opt {
  padding: 11px 16px;
  font-size: 11.5px; color: var(--text-2);
  cursor: pointer; transition: all .15s;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--font-mono);
}
.model-opt:last-child { border-bottom: none; }
.model-opt:hover, .model-opt.active { background: var(--green-dark); color: var(--green); }
.model-opt-badge {
  font-size: 9px; padding: 2px 8px; border-radius: 2px;
  font-weight: 600; letter-spacing: .06em;
}
.badge-stable  { background: rgba(0,255,136,.1); color: var(--green); }
.badge-preview { background: rgba(255,170,0,.1);  color: var(--amber); }

/* ── LAYOUT ── */
.app-body { display: flex; flex: 1; overflow: hidden; position: relative; z-index: 1; }

/* ── SIDEBAR ── */
.sidebar {
  width: 230px;
  border-right: 1px solid var(--border);
  background: var(--bg-1);
  display: flex; flex-direction: column;
  flex-shrink: 0; overflow: hidden;
}
.sidebar-section {
  padding: 14px 14px 10px;
  border-bottom: 1px solid var(--border);
}
.sidebar-label {
  font-size: 9px; font-weight: 600;
  color: var(--text-3); letter-spacing: .12em;
  text-transform: uppercase; margin-bottom: 10px;
  display: flex; align-items: center; gap: 6px;
}
.sidebar-label::after { content: ''; flex: 1; height: 1px; background: var(--border); }
.new-chat-btn {
  width: 100%; padding: 8px 12px;
  background: var(--green-dark);
  border: 1px solid var(--border-hover);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px; color: var(--green);
  cursor: pointer; transition: all .2s;
  display: flex; align-items: center; gap: 7px;
  letter-spacing: .04em;
}
.new-chat-btn:hover { background: rgba(0,255,136,.12); border-color: var(--green); }
.new-chat-btn svg { width: 13px; height: 13px; stroke: currentColor; fill: none; stroke-width: 2; }

.chat-list { flex: 1; overflow-y: auto; padding: 8px; }
.chat-list::-webkit-scrollbar { width: 3px; }
.chat-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }

.chat-item {
  padding: 9px 10px; border-radius: 2px;
  font-size: 11px; color: var(--text-2);
  cursor: pointer; transition: all .15s;
  border: 1px solid transparent;
  margin-bottom: 3px;
}
.chat-item:hover { background: var(--bg-2); border-color: var(--border); color: var(--text-1); }
.chat-item.active { background: var(--green-dark); border-color: var(--border-hover); color: var(--green); }
.chat-item-title {
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  margin-bottom: 3px;
}
.chat-item-meta {
  display: flex; justify-content: space-between;
  font-size: 9px; color: var(--text-3);
}
.chat-item-del {
  background: none; border: none; cursor: pointer;
  color: var(--text-3); font-size: 11px; padding: 0 2px;
  transition: color .15s; line-height: 1;
}
.chat-item-del:hover { color: var(--red); }

.sidebar-stats {
  padding: 12px 14px;
  border-top: 1px solid var(--border);
  background: var(--bg-2);
}
.stat-row {
  display: flex; justify-content: space-between;
  font-size: 10px; color: var(--text-3); margin-bottom: 4px;
}
.stat-row span:last-child { color: var(--green); }

/* ── CHAT AREA ── */
.chat-area { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

.messages { flex: 1; overflow-y: auto; padding: 24px; display: flex; flex-direction: column; gap: 0; }
.messages::-webkit-scrollbar { width: 4px; }
.messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }

/* Welcome */
.welcome {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center; padding: 40px;
  animation: fadeIn .5s ease;
}
.welcome-icon {
  width: 72px; height: 72px;
  border: 1px solid var(--border-hover); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 24px;
  box-shadow: 0 0 40px var(--green-glow);
}
.welcome-icon svg { width: 32px; height: 32px; stroke: var(--green); fill: none; stroke-width: 1.5; }
.welcome h2 {
  font-family: var(--font-display);
  font-size: 20px; font-weight: 700;
  color: var(--green); letter-spacing: .1em; margin-bottom: 8px;
}
.welcome p { font-size: 12px; color: var(--text-3); line-height: 1.8; max-width: 400px; margin-bottom: 28px; }
.welcome-chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.chip {
  padding: 7px 14px;
  border: 1px solid var(--border); border-radius: 2px;
  font-size: 11px; color: var(--text-2);
  cursor: pointer; transition: all .15s; background: var(--bg-2);
}
.chip:hover { border-color: var(--border-hover); color: var(--green); background: var(--green-dark); }

/* Messages */
.msg {
  display: flex; gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(0,255,136,.04);
  animation: msgIn .25s ease both;
}
.msg.user { flex-direction: row-reverse; }
.msg-avatar {
  width: 32px; height: 32px; border-radius: 2px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-size: 11px; font-weight: 700;
  flex-shrink: 0; letter-spacing: .05em;
}
.msg.ai   .msg-avatar { background: var(--green-dark); border: 1px solid var(--border-hover); color: var(--green); }
.msg.user .msg-avatar { background: rgba(0,212,255,.08); border: 1px solid rgba(0,212,255,.2); color: var(--cyan); }
.msg-content { flex: 1; min-width: 0; }
.msg-header { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.msg-name { font-size: 11px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; }
.msg.ai   .msg-name { color: var(--green); }
.msg.user .msg-name { color: var(--cyan); }
.msg-time { font-size: 10px; color: var(--text-3); }
.msg-body {
  font-size: 13.5px; color: var(--text-1);
  line-height: 1.75; white-space: pre-wrap; word-break: break-word;
}
.msg.user .msg-body {
  background: rgba(0,212,255,.05);
  border: 1px solid rgba(0,212,255,.1);
  border-radius: 2px; padding: 12px 16px;
}
.msg-body strong { color: var(--green); font-weight: 600; }
.msg-body code {
  font-family: var(--font-mono);
  background: var(--bg-2); border: 1px solid var(--border);
  padding: 1px 6px; border-radius: 2px;
  font-size: 12px; color: var(--amber);
}
.msg-body pre {
  background: var(--bg-2); border: 1px solid var(--border);
  border-left: 2px solid var(--green); border-radius: 2px;
  padding: 14px 16px; margin: 10px 0;
  overflow-x: auto; font-size: 12px; color: var(--text-1); line-height: 1.6;
}
.msg-error { color: var(--red) !important; }

/* Thinking */
.thinking {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 0; font-size: 11px; color: var(--text-3); letter-spacing: .06em;
}
.thinking-dots { display: flex; gap: 4px; }
.thinking-dot {
  width: 4px; height: 4px;
  background: var(--green); border-radius: 50%;
  animation: blink 1.2s ease infinite;
}
.thinking-dot:nth-child(2) { animation-delay: .2s; }
.thinking-dot:nth-child(3) { animation-delay: .4s; }

/* ── INPUT ── */
.input-area {
  padding: 14px 24px 18px;
  border-top: 1px solid var(--border);
  background: var(--bg-1); flex-shrink: 0;
}
.input-wrap {
  display: flex; gap: 10px; align-items: flex-end;
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: 2px; padding: 12px 14px;
  transition: border-color .2s, box-shadow .2s;
}
.input-wrap:focus-within {
  border-color: var(--green-dim);
  box-shadow: 0 0 0 3px var(--green-dark);
}
.input-ta {
  flex: 1; background: none; border: none; outline: none;
  font-family: var(--font-mono);
  font-size: 13.5px; color: var(--text-1);
  resize: none; max-height: 150px; line-height: 1.6;
  caret-color: var(--green);
}
.input-ta::placeholder { color: var(--text-3); }
.send-btn {
  width: 36px; height: 36px;
  background: var(--green-dark); border: 1px solid var(--border-hover);
  border-radius: 2px; display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: all .2s; flex-shrink: 0;
}
.send-btn:hover { background: rgba(0,255,136,.2); border-color: var(--green); }
.send-btn svg { width: 16px; height: 16px; stroke: var(--green); fill: none; stroke-width: 2; }
.input-meta {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 8px; font-size: 10px; color: var(--text-3); padding: 0 2px;
}
.input-hint { display: flex; align-items: center; gap: 12px; }
.kbd {
  background: var(--bg-2); border: 1px solid var(--border);
  padding: 1px 5px; border-radius: 2px;
  font-size: 9px; color: var(--text-3);
}

/* ── VOICE BUTTON ── */
.voice-btn {
  width: 36px; height: 36px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 2px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: all .2s; flex-shrink: 0;
}
.voice-btn svg { width: 16px; height: 16px; stroke: var(--text-2); fill: none; stroke-width: 2; }
.voice-btn:hover { border-color: var(--border-hover); }
.voice-btn:hover svg { stroke: var(--text-1); }

/* Estado: gravando */
.voice-btn.recording {
  background: rgba(255, 51, 85, .12);
  border-color: var(--red);
  animation: voicePulse .8s ease infinite;
}
.voice-btn.recording svg { stroke: var(--red); }

/* Estado: transcrevendo */
.voice-btn.transcribing {
  background: rgba(255, 170, 0, .1);
  border-color: var(--amber);
}
.voice-btn.transcribing svg { stroke: var(--amber); }

@keyframes voicePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255,51,85,.4); }
  50%       { box-shadow: 0 0 0 6px rgba(255,51,85,0); }
}

/* Tooltip de voz */
.voice-toast {
  position: fixed; bottom: 80px; left: 50%; transform: translateX(-50%);
  background: var(--bg-1); border: 1px solid var(--border-hover);
  border-radius: 2px; padding: 8px 16px;
  font-family: var(--font-mono); font-size: 11px; color: var(--text-2);
  letter-spacing: .05em; white-space: nowrap;
  z-index: 300; animation: fadeUp .2s ease;
  pointer-events: none;
}
.voice-toast.error { border-color: var(--red); color: var(--red); }
.bottom-nav {
  display: none;
  position: fixed; bottom: 0; left: 0; right: 0;
  background: var(--bg-1);
  border-top: 1px solid var(--border);
  padding: 8px 0 calc(8px + env(safe-area-inset-bottom));
  z-index: 150;
}
.bottom-nav-inner {
  display: flex; justify-content: space-around; align-items: center;
}
.bn-btn {
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  background: none; border: none; cursor: pointer;
  color: var(--text-3); font-family: var(--font-mono);
  font-size: 9px; letter-spacing: .06em;
  padding: 4px 14px; border-radius: 2px;
  transition: color .15s;
}
.bn-btn svg { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 2; }
.bn-btn.active, .bn-btn:hover { color: var(--green); }

/* ── CHAT DRAWER MOBILE ── */
.chat-drawer {
  display: none;
  position: fixed; inset: 0;
  z-index: 140;
}
.chat-drawer.open { display: block; }
.chat-drawer-overlay {
  position: absolute; inset: 0;
  background: rgba(0,0,0,.7);
  backdrop-filter: blur(4px);
}
.chat-drawer-panel {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: var(--bg-1);
  border-top: 1px solid var(--border-hover);
  border-radius: 12px 12px 0 0;
  max-height: 70vh;
  display: flex; flex-direction: column;
  animation: slideUp .25s ease;
}
@keyframes slideUp { from { transform: translateY(100%) } to { transform: translateY(0) } }
.drawer-handle {
  width: 36px; height: 4px;
  background: var(--border-hover); border-radius: 99px;
  margin: 12px auto 0;
}
.drawer-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 11px; font-weight: 600; color: var(--green);
  letter-spacing: .08em;
}
.drawer-close {
  background: none; border: none; cursor: pointer;
  color: var(--text-3); font-size: 16px;
}
.drawer-new-btn {
  margin: 10px 12px 4px;
  width: calc(100% - 24px);
  padding: 9px; background: var(--green-dark);
  border: 1px solid var(--border-hover); border-radius: 2px;
  font-family: var(--font-mono); font-size: 11px; color: var(--green);
  cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 7px;
}
.drawer-list {
  flex: 1; overflow-y: auto; padding: 8px 12px 12px;
}
.drawer-list::-webkit-scrollbar { width: 3px; }
.drawer-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  /* Topbar compacta */
  .topbar { padding: 0 12px; gap: 8px; }
  .topbar-logo { font-size: 13px; }
  .topbar-right { gap: 6px; }
  .topbar-btn { padding: 4px 8px; font-size: 10px; }
  .user-badge { display: none; }

  /* Chat area sem sidebar */
  .messages { padding: 14px; padding-bottom: 70px; }
  .input-area { padding: 10px 12px 14px; padding-bottom: calc(14px + env(safe-area-inset-bottom)); }
  .input-meta { display: none; }

  /* Bottom nav visível */
  .bottom-nav { display: block; }

  /* App ocupa viewport inteira */
  #app { height: 100dvh; }
  .app-body { height: calc(100dvh - 50px); }
  .chat-area { padding-bottom: 56px; }
}

@media (max-width: 480px) {
  .topbar-btn { display: none; }
  .topbar-logo { font-size: 12px; }
}