/* AI Chat Assistant - Premium Design */
:root {
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --primary: #667eea;
  --bg: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  --text: #111827;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --border: #e5e7eb;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
  --radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; -webkit-font-smoothing: antialiased; }
.app-container { display: flex; flex-direction: column; height: 100vh; overflow: hidden; }
.header { display: flex; justify-content: space-between; align-items: center; padding: 16px 24px; background: var(--bg); border-bottom: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.header-left { display: flex; align-items: center; gap: 16px; }
.back-button { padding: 8px 14px; border: none; background: var(--bg-secondary); border-radius: 8px; cursor: pointer; font-size: 14px; font-weight: 500; transition: var(--transition); }
.back-button:hover { background: var(--bg-tertiary); transform: translateX(-2px); }
.header h1 { font-size: 22px; font-weight: 700; background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.status-indicator { width: 10px; height: 10px; border-radius: 50%; background: #10b981; box-shadow: 0 0 0 4px rgba(16,185,129,0.2); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.5; } }
.header-right { display: flex; align-items: center; gap: 12px; }
#model-select { padding: 10px 16px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg); color: var(--text); font-size: 14px; font-weight: 500; cursor: pointer; transition: var(--transition); }
#model-select:hover { border-color: var(--primary); }
.icon-button { width: 42px; height: 42px; display: flex; align-items: center; justify-content: center; border: none; background: var(--bg-secondary); border-radius: 10px; cursor: pointer; font-size: 18px; transition: var(--transition); }
.icon-button:hover { background: var(--bg-tertiary); transform: rotate(30deg); }
.chat-messages { flex: 1; overflow-y: auto; padding: 24px; background: var(--bg); }
.chat-messages::-webkit-scrollbar { width: 6px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
.welcome-message { display: flex; flex-direction: column; align-items: center; justify-content: center; height: 100%; text-align: center; animation: fadeIn 0.6s ease; }
.welcome-icon { font-size: 72px; margin-bottom: 24px; animation: float 3s ease-in-out infinite; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
.welcome-message h2 { font-size: 32px; font-weight: 700; margin-bottom: 12px; background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.welcome-message p { font-size: 17px; color: var(--text-secondary); }
.message { display: flex; gap: 12px; margin-bottom: 24px; animation: slideIn 0.3s ease; }
@keyframes slideIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.message.user { flex-direction: row-reverse; }
.message-avatar { width: 38px; height: 38px; min-width: 38px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 18px; background: var(--bg-secondary); box-shadow: var(--shadow-sm); }
.message.assistant .message-avatar { background: var(--primary-gradient); }
.message-content { max-width: 70%; padding: 14px 18px; border-radius: 16px; background: var(--bg-secondary); box-shadow: var(--shadow-sm); word-wrap: break-word; }
.message.user .message-content { background: var(--primary-gradient); color: white; }
.message-content img { max-width: 100%; border-radius: var(--radius); margin-top: 10px; }
.message-content pre { background: var(--bg); padding: 14px; border-radius: var(--radius); overflow-x: auto; margin: 10px 0; border: 1px solid var(--border); }
.message-content code { background: var(--bg); padding: 3px 8px; border-radius: 6px; font-family: "Monaco","Consolas",monospace; font-size: 14px; border: 1px solid var(--border); }
.token-usage { display: inline-flex; align-items: center; gap: 6px; margin-top: 10px; padding: 6px 12px; background: var(--bg); border-radius: 8px; font-size: 12px; color: var(--text-secondary); font-weight: 500; }
.typing-indicator { display: flex; gap: 5px; padding: 10px; }
.typing-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--text-muted); animation: typing 1.4s infinite; }
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing { 0%,60%,100% { transform: translateY(0); } 30% { transform: translateY(-12px); } }
.input-area { padding: 16px 24px 24px; background: var(--bg); border-top: 1px solid var(--border); }
.toolbar { display: flex; gap: 10px; margin-bottom: 12px; }
.toolbar-btn { width: 38px; height: 38px; display: flex; align-items: center; justify-content: center; border: 1px solid var(--border); background: var(--bg); border-radius: 10px; cursor: pointer; font-size: 16px; transition: var(--transition); }
.toolbar-btn:hover { background: var(--bg-secondary); border-color: var(--primary); transform: scale(1.05); }
.image-preview { display: flex; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.preview-item { position: relative; width: 85px; height: 85px; }
.preview-item img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius); }
.preview-item button { position: absolute; top: -8px; right: -8px; width: 22px; height: 22px; border: none; background: #ef4444; color: white; border-radius: 50%; cursor: pointer; font-size: 12px; }
#message-input { width: 100%; min-height: 90px; padding: 14px 18px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg); color: var(--text); font-size: 15px; line-height: 1.6; resize: none; outline: none; transition: var(--transition); }
#message-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(102,126,234,0.1); }
#message-input::placeholder { color: var(--text-muted); }
.send-btn { width: 100%; margin-top: 14px; padding: 16px 28px; border: none; border-radius: var(--radius); background: var(--primary-gradient); color: white; font-size: 16px; font-weight: 600; cursor: pointer; transition: var(--transition); box-shadow: var(--shadow-md); }
.send-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.send-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.modal { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); backdrop-filter: blur(4px); z-index: 1000; align-items: center; justify-content: center; animation: fadeIn 0.2s ease; }
.modal[style*="flex"] { display: flex !important; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.modal-content { background: var(--bg); border-radius: 20px; box-shadow: var(--shadow-xl); max-width: 520px; width: 90%; max-height: 90vh; overflow-y: auto; animation: slideUp 0.3s ease; }
@keyframes slideUp { from { opacity: 0; transform: translateY(20px) scale(0.95); } to { opacity: 1; transform: translateY(0) scale(1); } }
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 24px; border-bottom: 1px solid var(--border); }
.modal-header h3 { font-size: 20px; font-weight: 700; color: var(--text); }
.close-btn { width: 36px; height: 36px; border: none; background: var(--bg-secondary); border-radius: 50%; cursor: pointer; font-size: 22px; color: var(--text-secondary); transition: var(--transition); }
.close-btn:hover { background: var(--bg-tertiary); transform: rotate(90deg); }
.modal-body { padding: 28px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 10px; font-size: 14px; font-weight: 600; color: var(--text); }
input[type="text"],input[type="password"],textarea,select { width: 100%; padding: 12px 16px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg); color: var(--text); font-size: 15px; transition: var(--transition); }
input:focus,textarea:focus,select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(102,126,234,0.1); }
.btn { padding: 14px 28px; border: none; border-radius: var(--radius); font-size: 15px; font-weight: 600; cursor: pointer; transition: var(--transition); }
.btn-primary { background: var(--primary-gradient); color: white; box-shadow: var(--shadow-md); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-secondary { background: var(--bg-secondary); color: var(--text); }
.btn-secondary:hover { background: var(--bg-tertiary); }
.toast { position: fixed; top: 28px; left: 50%; transform: translateX(-50%) translateY(-100px); padding: 14px 28px; border-radius: var(--radius); background: var(--bg); box-shadow: var(--shadow-xl); z-index: 10000; transition: transform 0.3s ease; font-size: 15px; font-weight: 500; }
.toast.show { transform: translateX(-50%) translateY(0); }
.toast.success { background: #10b981; color: white; }
.toast.error { background: #ef4444; color: white; }
.setting-item { margin-bottom: 22px; }
.setting-item label { display: block; margin-bottom: 10px; font-size: 14px; font-weight: 600; color: var(--text); }
input[type="range"] { width: 100%; height: 8px; border-radius: 4px; background: var(--border); outline: none; }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; border-radius: 50%; background: var(--primary-gradient); cursor: pointer; }
.setting-actions { display: flex; gap: 12px; margin-top: 28px; }
.hint { padding: 14px; background: var(--bg-secondary); border-radius: var(--radius); font-size: 13px; color: var(--text-secondary); line-height: 1.6; }
@media (max-width: 768px) {
  .header { padding: 12px 16px; }
  .header h1 { font-size: 18px; }
  .chat-messages { padding: 16px; }
  .message-content { max-width: 85%; }
  .input-area { padding: 12px 16px 20px; }
  #model-select { font-size: 13px; padding: 8px 14px; }
}

/* Token Usage Display */
.token-usage-display {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text);
    transition: var(--transition);
}

.token-usage-display:hover {
    border-color: var(--primary);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.2);
}

.token-icon {
    font-size: 16px;
    line-height: 1;
}

.token-text {
    font-weight: 600;
    color: var(--primary);
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* 响应式 */
@media (max-width: 768px) {
    .token-usage-display {
        padding: 6px 10px;
        font-size: 12px;
    }
    
    .token-text {
        font-size: 11px;
    }
}

/* 增强Token使用显示 */
.token-usage-display {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: linear-gradient(135deg, #667eea15 0%, #764ba215 100%);
    border: 1px solid var(--primary);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.1);
}

.token-usage-display:hover {
    background: linear-gradient(135deg, #667eea25 0%, #764ba225 100%);
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
    transform: translateY(-1px);
}

.token-icon {
    font-size: 16px;
    line-height: 1;
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.1));
}

.token-text {
    font-weight: 700;
    font-size: 11px;
    letter-spacing: 0.3px;
}

/* Voice Recording State */
.toolbar-btn.recording {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%) !important;
    animation: recording-pulse 1.5s ease-in-out infinite;
}
@keyframes recording-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7); }
    50% { box-shadow: 0 0 0 10px rgba(239, 68, 68, 0); }
}
.voice-status {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 20px 30px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 10000;
}

/* Mobile Voice Button Fix */
@media (max-width: 768px) {
    #voice-btn { display: flex !important; }
    .toolbar-btn { min-width: 40px !important; }
}