/* --- 全局变量定义 --- */
:root {
    --bg-color: #1a1a2e;
    --panel-color: #16213e;
    --border-color: #0f3460;
    --text-color: #e9ecef;
    --text-muted-color: #a9a9b3;
    --accent-color: #5378e2;
    --accent-hover-color: #6c91ff;
    --error-color: #e94560;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
/* --- 基本样式重置 --- */
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font-family); background-color: var(--bg-color); color: var(--text-color); line-height: 1.6; overflow-x: hidden; }

/* --- 登录页面 --- */
.login-container { display: flex; justify-content: center; align-items: center; min-height: 100vh; padding: 2rem; }
.login-box { width: 100%; max-width: 400px; background-color: var(--panel-color); padding: 2.5rem; border-radius: 12px; border: 1px solid var(--border-color); box-shadow: 0 0 30px rgba(83, 120, 226, 0.1); }
.login-box h1 { text-align: center; color: var(--text-color); margin-bottom: 1.5rem; font-weight: 600; }
.form-toggle { display: flex; margin-bottom: 1.5rem; background-color: rgba(0,0,0,0.2); border-radius: 8px; padding: 4px; }
.form-toggle button { flex: 1; padding: 0.75rem; border: none; background: transparent; color: var(--text-muted-color); font-size: 1rem; cursor: pointer; border-radius: 6px; transition: all 0.3s ease; }
.form-toggle button.active { background-color: var(--accent-color); color: #fff; font-weight: 600; }
.form-group { margin-bottom: 1.5rem; }
label { display: block; margin-bottom: 0.5rem; color: var(--text-muted-color); font-size: 0.9rem; }
input[type="text"], input[type="password"] { width: 100%; padding: 0.75rem 1rem; background-color: var(--bg-color); border: 1px solid var(--border-color); border-radius: 8px; color: var(--text-color); font-size: 1rem; transition: all 0.3s ease; }
input[type="text"]:focus, input[type="password"]:focus { outline: none; border-color: var(--accent-color); box-shadow: 0 0 10px rgba(83, 120, 226, 0.3); }
button[type="submit"] { width: 100%; padding: 0.8rem; background-color: var(--accent-color); color: #fff; border: none; border-radius: 8px; font-size: 1rem; font-weight: 600; cursor: pointer; transition: background-color 0.3s ease; }
button[type="submit"]:hover { background-color: var(--accent-hover-color); }
.error { background-color: rgba(233, 69, 96, 0.1); border: 1px solid var(--error-color); color: var(--error-color); padding: 0.75rem; border-radius: 8px; margin-bottom: 1rem; text-align: center; }
.success { background-color: rgba(40, 167, 69, 0.1); border: 1px solid #28a745; color: #28a745; padding: 0.75rem; border-radius: 8px; margin-bottom: 1rem; text-align: center; }

/* --- 主应用布局 --- */
.main-layout { display: flex; height: 100vh; }
.history-panel { flex: 0 0 350px; background-color: var(--panel-color); border-right: 1px solid var(--border-color); padding: 1.5rem; display: flex; flex-direction: column; overflow: hidden; }
.history-panel h2 { margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 1px solid var(--border-color); }
.history-list { flex-grow: 1; overflow-y: auto; margin-right: -1.5rem; padding-right: 1.5rem; }
.history-item { display: flex; gap: 1rem; padding: 1rem; background-color: rgba(0,0,0,0.2); border-radius: 8px; margin-bottom: 1rem; cursor: pointer; transition: background-color 0.3s ease; }
.history-item:hover { background-color: var(--border-color); }
.history-item img { width: 64px; height: 64px; border-radius: 6px; object-fit: cover; }
.history-info { flex: 1; overflow: hidden; }
.history-info .prompt { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: var(--text-color); margin-bottom: 0.25rem; }
.history-info .timestamp { font-size: 0.8rem; color: var(--text-muted-color); }
.generator-panel { flex-grow: 1; padding: 2rem 3rem; display: flex; flex-direction: column; overflow-y: auto; }
.header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; }
.header h1 { color: var(--text-color); font-weight: 600; }
.user-info { display: flex; align-items: center; gap: 1.5rem; }
.user-info span { color: var(--text-muted-color); }
.user-info strong { color: var(--text-color); font-weight: 500; }
.user-info a { color: var(--accent-color); text-decoration: none; }
.user-info a:hover { text-decoration: underline; }

/* --- 全新 Composer 样式 --- */
.main-form { margin-bottom: 2rem; }
.composer { background-color: #fff; border: 1px solid #e0e0e0; border-radius: 12px; box-shadow: 0 4px 12px rgba(0,0,0,0.05); padding: 12px; color: #333; transition: box-shadow 0.3s ease; }
.composer:focus-within { box-shadow: 0 4px 20px rgba(83, 120, 226, 0.2); border-color: var(--accent-color); }
.composer-main { display: flex; align-items: flex-start; padding-bottom: 12px; }
.composer-main textarea { flex-grow: 1; border: none; outline: none; background: transparent; resize: none; min-height: 64px; padding: 12px 8px; font-size: 1rem; color: #333; margin-left: 0; }
.template-link { color: #6c757d; text-decoration: none; font-size: 0.9rem; align-self: flex-start; padding: 14px 0; }
.composer-controls { display: flex; align-items: center; gap: 10px; padding-top: 12px; border-top: 1px solid #f0f2f5; }
.control-btn { background-color: #f0f2f5; border: none; border-radius: 8px; padding: 8px 12px; font-size: 0.9rem; color: #333; cursor: pointer; }
#max-images-wrapper { display: flex; align-items: center; }
#max-images-wrapper input { width: 40px; border: none; background: transparent; text-align: center; outline: none; }
#max-images-wrapper input::-webkit-outer-spin-button, #max-images-wrapper input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
#max-images-wrapper input[type=number] { -moz-appearance: textfield; }

/* --- 动态上传容器样式 --- */
.upload-container { display: flex; align-items: center; gap: 10px; padding-right: 10px; }
.upload-box { flex-shrink: 0; width: 64px; height: 64px; position: relative; }
.upload-label { width: 100%; height: 100%; border-radius: 8px; border: 2px dashed #d9dee3; display: flex; align-items: center; justify-content: center; cursor: pointer; color: #acb4c2; transition: all 0.3s ease; overflow: hidden; }
.upload-label:hover { border-color: var(--accent-color); color: var(--accent-color); }
.upload-label.has-preview { border-style: solid; border-color: #e0e0e0; padding: 0; }
.upload-label.has-preview svg { display: none; }
.preview-img { width: 100%; height: 100%; object-fit: cover; }
.upload-box .remove-btn { position: absolute; top: -8px; right: -8px; width: 22px; height: 22px; border-radius: 50%; background-color: rgba(0,0,0,0.7); color: white; border: 2px solid white; font-size: 14px; line-height: 18px; text-align: center; cursor: pointer; opacity: 0; transition: opacity 0.3s, transform 0.3s; transform: scale(0.8); z-index: 10; padding: 0; min-width: unset; }
.upload-box.has-preview:hover .remove-btn { opacity: 1; transform: scale(1); }

/* --- 智能UI样式 --- */
.mode-indicator { background-color: #e9ecef; font-weight: 500; }
#size-wrapper { flex-shrink: 0; }
#size_options.control-btn { min-width: 130px; width: auto; }
.submit-button { margin-left: auto; flex-shrink: 0; width: 40px; height: 40px; border-radius: 8px; background-color: var(--accent-color); color: white; border: none; display: flex; align-items: center; justify-content: center; cursor: pointer; transition: background-color 0.3s; padding: 0; }
.submit-button:hover { background-color: var(--accent-hover-color); }
.submit-button.disabled { background-color: #6c757d; cursor: not-allowed; }
#loading-indicator { display: flex; align-items: center; justify-content: center; gap: 10px; margin-top: 1rem; padding: 1rem; background-color: var(--panel-color); border-radius: 8px; border: 1px solid var(--border-color); color: var(--text-muted-color); }
.spinner { border: 3px solid #3a4766; border-top: 3px solid var(--accent-color); border-radius: 50%; width: 20px; height: 20px; animation: spin 1s linear infinite; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

/* --- 结果展示和Modal --- */
.result-gallery { margin-top: 2rem; }
.result-gallery h2 { margin-bottom: 1rem; color: var(--text-muted-color); }
.image-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 1rem; }
.image-grid .image-item img { width: 100%; height: auto; border-radius: 8px; border: 1px solid var(--border-color); cursor: pointer; transition: transform 0.3s ease; }
.image-grid .image-item img:hover { transform: scale(1.05); box-shadow: 0 0 20px rgba(83, 120, 226, 0.3); }
.modal { display: none; position: fixed; z-index: 1000; padding-top: 50px; left: 0; top: 0; width: 100%; height: 100%; overflow: auto; background-color: rgba(22, 33, 62, 0.9); backdrop-filter: blur(5px); }
.modal-content { margin: auto; display: block; max-width: 90%; max-height: 90%; object-fit: contain; }
.modal-close { position: absolute; top: 15px; right: 35px; color: #f1f1f1; font-size: 40px; font-weight: bold; transition: 0.3s; }
.modal-close:hover, .modal-close:focus { color: #bbb; text-decoration: none; cursor: pointer; }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #3a4766; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-color); }

/* --- 响应式设计 --- */
@media (max-width: 992px) {
    .main-layout { flex-direction: column; height: auto; }
    .history-panel { flex: 0 0 auto; height: 300px; border-right: none; border-bottom: 1px solid var(--border-color); }
    .generator-panel { padding: 1.5rem; }
    .image-grid { grid-template-columns: repeat(2, 1fr); }
    .composer-main { flex-direction: column; align-items: stretch; }
    .upload-container { margin-bottom: 10px; }
}

/* --- 追加：修复发送按钮过度拉伸的BUG --- */

.composer-controls .submit-button {
    flex-grow: 0;       /* 关键修复：禁止按钮拉伸以填充多余空间 */
    flex-shrink: 0;     /* 确保按钮不会被压缩 */
    width: 40px;        /* 保持固定的40px宽度 */
    height: 40px;       /* 保持固定的40px高度 */
    margin-left: auto;  /* 将其推到最右侧 */
}

/* --- 追加：组图分辨率选择器样式 --- */

#group-resolution-wrapper {
    flex-shrink: 0; /* 防止被压缩 */
}
#group_resolution.control-btn {
    min-width: 100px;
    width: auto;
}