:root {
    /* 深色基础变量 */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: rgba(0, 0, 0, 0.3);
    --accent: #6366f1; /* Indigo */
    --accent-hover: #4f46e5;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --bg-gradient: linear-gradient(135deg, #0f172a, #1e1b4b, #2e1065);
    --user-msg-bg: linear-gradient(135deg, #6366f1, #4f46e5);
    --bot-msg-bg: rgba(255, 255, 255, 0.08);
    --danger: #ef4444;
    --input-bg: rgba(0, 0, 0, 0.2);
}

body.light-theme {
    /* 浅色模态变量 */
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-shadow: rgba(0, 0, 0, 0.1);
    --accent: #4f46e5;
    --accent-hover: #4338ca;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --bg-gradient: linear-gradient(135deg, #f0fdf4, #e0e7ff, #f3e8ff);
    --user-msg-bg: linear-gradient(135deg, #4f46e5, #6366f1);
    --bot-msg-bg: rgba(255, 255, 255, 0.9);
    --input-bg: rgba(255, 255, 255, 0.7);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg-gradient);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background-attachment: fixed;
    transition: background 0.5s ease, color 0.3s ease;
}

/* 隐藏滚动条 */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-thumb { background: var(--glass-border); border-radius: 10px; }
::-webkit-scrollbar-track { background: transparent; }

.app-container {
    display: flex;
    justify-content: center;
    width: 100%;
    max-width: 1000px;
    height: 88vh;
    gap: 24px;
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: 0 16px 40px var(--glass-shadow);
}

/* -= 主交互面板 =- */
.main-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 24px;
    overflow: hidden;
    position: relative;
    max-width: 100%;
}

/* 顶部导航控制栏 */
.top-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    background: var(--glass-bg);
    padding: 8px 12px;
    border-radius: 16px;
    margin-bottom: 24px;
    border: 1px solid var(--glass-border);
    flex-wrap: wrap;
}

/* 模式切换 */
.mode-switcher {
    display: flex;
    background: var(--input-bg);
    border-radius: 10px;
    padding: 4px;
}

.mode-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.mode-btn:hover { color: var(--text-primary); }
.mode-btn.active {
    background: var(--glass-bg);
    color: var(--text-primary);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    border: 1px solid var(--glass-border);
}

/* 模型选择器 */
.model-selector-container {
    flex: 1;
    min-width: 150px;
    display: flex;
    align-items: center;
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 0 12px;
    height: 38px;
}
.model-selector-container i { color: var(--text-secondary); margin-right: 8px; }
.glass-select {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
    cursor: pointer;
    appearance: none; /* 隐去原生箭头 */
}
.glass-select option {
    background: #1e293b;
    color: #f8fafc;
}
body.light-theme .glass-select option {
    background: #ffffff;
    color: #1e293b;
}

/* 快捷操作键 */
.action-buttons {
    display: flex;
    gap: 8px;
}

.action-btn {
    width: 38px; height: 38px;
    border-radius: 10px;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    display: flex; justify-content: center; align-items: center;
}
.action-btn:hover {
    color: var(--text-primary);
    background: var(--input-bg);
    transform: scale(1.05);
}

/* -= 视图容器 =- */
.view-area {
    flex: 1;
    position: relative;
    margin-bottom: 24px;
}
.view-content {
    position: absolute;
    inset: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease, transform 0.5s ease;
    transform: translateY(15px);
    display: flex;
    flex-direction: column;
}
.view-content.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* -= 聊天气泡系统 =- */
.messages-container {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding-right: 12px;
    padding-bottom: 10px;
}

.message {
    max-width: 85%;
    padding: 14px 18px;
    border-radius: 16px;
    line-height: 1.6;
    word-break: break-word;
    font-size: 0.95rem;
    animation: bubblePop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
    box-shadow: 0 4px 12px var(--glass-shadow);
    position: relative;
}

.user-msg {
    align-self: flex-end;
    background: var(--user-msg-bg);
    color: white;
    border-bottom-right-radius: 4px;
}

.assistant-msg {
    align-self: flex-start;
    background: var(--bot-msg-bg);
    border-bottom-left-radius: 4px;
    border: 1px solid var(--glass-border);
    white-space: pre-wrap;
    padding-bottom: 30px; /* 为复制键留空 */
}

/* 复制按钮 */
.msg-copy-btn {
    position: absolute;
    bottom: 6px; right: 8px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.8rem;
    padding: 4px;
    opacity: 0.6;
    transition: all 0.2s;
}
.msg-copy-btn:hover { opacity: 1; color: var(--accent); }

.system-msg {
    align-self: center;
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    font-size: 0.85rem;
    border-radius: 20px;
    padding: 8px 16px;
    box-shadow: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

/* -= 画廊系统 =- */
.image-gallery {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 24px;
    overflow-y: auto;
    padding-right: 12px;
}
.placeholder {
    margin: auto;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 1.1rem;
    font-weight: 500;
}
.placeholder i {
    font-size: 4rem;
    margin-bottom: 16px;
    background: linear-gradient(45deg, #a855f7, #ec4899);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.img-result-card {
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 16px;
    animation: fadeIn 0.5s ease;
}
.img-prompt {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.5;
    padding-left: 10px;
    border-left: 3px solid var(--accent);
}
.img-result-card img {
    width: 100%;
    border-radius: 10px;
    display: block;
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
    transition: transform 0.3s;
}
.img-result-card img:hover { transform: scale(1.01); }

/* -= 底部文本输入区 =- */
.input-area {
    display: flex;
    gap: 16px;
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    padding: 12px 14px;
    border-radius: 18px;
    align-items: flex-end;
}
textarea {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    resize: none;
    height: 38px;
    max-height: 120px;
    outline: none;
    padding: 8px 4px;
    transition: all 0.3s;
}
textarea::placeholder { color: var(--text-secondary); opacity: 0.7; }

.send-btn {
    width: 44px; height: 44px;
    flex-shrink: 0;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    display: flex; justify-content: center; align-items: center;
    font-size: 1.1rem;
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}
.send-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.5);
}
.send-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* -= 设置模态框 =- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 1;
    transition: opacity 0.3s ease;
}
.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}
.modal-content {
    width: 90%;
    max-width: 400px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    max-height: 90vh;
    transform: translateY(0);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.modal-overlay.hidden .modal-content {
    transform: translateY(20px);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}
.close-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
}
.close-btn:hover { color: var(--danger); }

.brand-title {
    font-size: 1.4rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(to right, #a855f7, #6366f1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.modal-body {
    overflow-y: auto;
    padding-right: 8px;
}

.setting-controls {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.input-group label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}
input[type="text"], input[type="password"] {
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 10px 14px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: all 0.3s;
}
input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.divider {
    border: none;
    height: 1px;
    background: var(--glass-border);
    margin: 4px 0;
}

/* 列表管理组件 */
.list-manager {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 0.85rem;
}
.del-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
}
.del-btn:hover { color: var(--danger); }
.add-model-group {
    display: flex;
    gap: 8px;
    margin-top: 4px;
}
.add-model-group input { flex: 1; padding: 8px 12px; font-size: 0.85rem; }
.mini-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    border-radius: 8px;
    width: 36px;
    cursor: pointer;
}
.mini-btn:hover { background: var(--accent); color: white; border-color: var(--accent); }

.btn {
    padding: 12px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s;
    display: flex; justify-content: center; align-items: center; gap: 8px;
}
.primary-btn {
    background: var(--accent);
    color: white;
    margin-top: 8px;
}
.primary-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

.panel-footer {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-align: center;
    margin-top: 16px;
    opacity: 0.7;
}

/* -= 动画定义 =- */
@keyframes bubblePop {
    0% { opacity: 0; transform: translateY(10px) scale(0.95); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.custom-loader {
    width: 20px; height: 20px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.2);
    border-top-color: white;
    animation: spin 1s infinite linear;
}

@media (max-width: 600px) {
    .top-nav {
        flex-direction: column;
        align-items: stretch;
    }
    .model-selector-container {
        margin: 4px 0;
    }
    .action-buttons {
        justify-content: center;
    }
}