/* ============================================================
   Pseudo-Chat 实验系统 - 孟菲斯风格样式表
   用途：用户界面（登录页、指导语页、Trial页、完成页）
   风格：孟菲斯设计风格 - 明亮色彩、几何图形、硬阴影
   ============================================================ */

/* -------------------- CSS变量定义 -------------------- */
:root {
    --memphis-yellow: #FFD93D;
    --memphis-pink: #FF6B9D;
    --memphis-green: #6BCB77;
    --memphis-cyan: #4D96FF;
    --memphis-black: #1a1a2e;
    --memphis-white: #FFFFFF;
    --memphis-gray: #F0F0F0;
    --chat-user-bg: #FFD93D;
    --chat-ai-bg: #E8E8E8;
    --shadow-hard: 4px 4px 0px var(--memphis-black);
    --shadow-hard-sm: 3px 3px 0px var(--memphis-black);
    --border-thick: 3px solid var(--memphis-black);
}

/* -------------------- 全局重置 -------------------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue",
                 Helvetica, Arial, sans-serif;
    background-color: var(--memphis-gray);
    color: var(--memphis-black);
    min-height: 100vh;
    overflow-x: hidden;
}

/* -------------------- 页面显示控制 -------------------- */
/* 默认隐藏所有页面，只有.active的页面才显示 */
.page {
    display: none;
    min-height: 100vh;
}

/* 激活状态的页面显示为块级元素 */
.page.active {
    display: block;
}

/* .hidden 类用于JS动态隐藏元素 */
.hidden {
    display: none !important;
}

/* -------------------- 登录页 -------------------- */
#login-page {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background-color: var(--memphis-gray);
}

/* 孟菲斯几何背景装饰 */
.memphis-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

/* 装饰圆点 */
.memphis-dot {
    position: absolute;
    border-radius: 50%;
    border: 3px solid var(--memphis-black);
}

.memphis-dot.dot-1 {
    width: 60px;
    height: 60px;
    background-color: var(--memphis-pink);
    top: 10%;
    left: 8%;
}

.memphis-dot.dot-2 {
    width: 40px;
    height: 40px;
    background-color: var(--memphis-cyan);
    top: 20%;
    right: 12%;
}

.memphis-dot.dot-3 {
    width: 80px;
    height: 80px;
    background-color: var(--memphis-yellow);
    bottom: 15%;
    left: 15%;
}

.memphis-dot.dot-4 {
    width: 50px;
    height: 50px;
    background-color: var(--memphis-green);
    bottom: 25%;
    right: 8%;
}

/* 装饰交叉线 */
.memphis-cross {
    position: absolute;
    width: 30px;
    height: 30px;
}

.memphis-cross::before,
.memphis-cross::after {
    content: "";
    position: absolute;
    background-color: var(--memphis-black);
}

.memphis-cross::before {
    width: 3px;
    height: 100%;
    left: 50%;
    transform: translateX(-50%);
}

.memphis-cross::after {
    width: 100%;
    height: 3px;
    top: 50%;
    transform: translateY(-50%);
}

.memphis-cross.cross-1 {
    top: 15%;
    right: 25%;
    transform: rotate(15deg);
}

.memphis-cross.cross-2 {
    bottom: 20%;
    left: 5%;
    transform: rotate(-20deg);
}

/* 装饰波浪线 */
.memphis-wave {
    position: absolute;
    width: 80px;
    height: 20px;
    border-top: 4px solid var(--memphis-pink);
    border-radius: 50%;
}

.memphis-wave.wave-1 {
    top: 35%;
    left: 3%;
    transform: rotate(-10deg);
}

.memphis-wave.wave-2 {
    bottom: 40%;
    right: 5%;
    transform: rotate(10deg);
    border-top-color: var(--memphis-green);
}

/* 装饰三角形 */
.memphis-tri {
    position: absolute;
    width: 0;
    height: 0;
    border-style: solid;
}

.memphis-tri.tri-1 {
    border-width: 0 25px 43px 25px;
    border-color: transparent transparent var(--memphis-cyan) transparent;
    top: 8%;
    left: 35%;
    transform: rotate(20deg);
}

.memphis-tri.tri-2 {
    border-width: 0 20px 35px 20px;
    border-color: transparent transparent var(--memphis-yellow) transparent;
    bottom: 10%;
    right: 30%;
    transform: rotate(-15deg);
}

/* 装饰半圆 */
.memphis-semi {
    position: absolute;
    width: 50px;
    height: 25px;
    border: 3px solid var(--memphis-black);
    border-bottom: none;
    border-radius: 50px 50px 0 0;
}

.memphis-semi.semi-1 {
    background-color: var(--memphis-pink);
    top: 60%;
    left: 20%;
    transform: rotate(45deg);
}

.memphis-semi.semi-2 {
    background-color: var(--memphis-green);
    top: 45%;
    right: 15%;
    transform: rotate(-30deg);
}

/* 登录卡片 */
.login-card {
    position: relative;
    z-index: 10;
    background-color: var(--memphis-white);
    border: var(--border-thick);
    border-radius: 20px 8px 20px 8px;
    padding: 48px 40px;
    width: 90%;
    max-width: 420px;
    box-shadow: var(--shadow-hard);
    text-align: center;
}

/* 实验标题 */
#study-title {
    font-size: 28px;
    font-weight: 800;
    color: var(--memphis-black);
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.login-subtitle {
    font-size: 14px;
    color: #666;
    margin-bottom: 28px;
}

/* 登录输入框 */
#login-userid,
#login-password {
    width: 100%;
    padding: 14px 16px;
    margin-bottom: 16px;
    border: 2px solid var(--memphis-black);
    border-radius: 8px;
    font-size: 15px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

#login-userid:focus,
#login-password:focus {
    border-color: var(--memphis-cyan);
    box-shadow: 0 0 0 3px rgba(77, 150, 255, 0.2);
}

/* 登录错误提示 */
#login-error {
    min-height: 20px;
    font-size: 13px;
    color: #e74c3c;
    margin-bottom: 10px;
    text-align: left;
}

/* 通用错误消息样式（适用于所有页面） */
.error-message {
    min-height: 20px;
    font-size: 14px;
    color: #e74c3c;
    background: #fdeaea;
    border: 1px solid #e74c3c;
    border-radius: 8px;
    padding: 10px 16px;
    margin: 10px 0;
    text-align: left;
    display: none; /* 默认隐藏，JS控制显示 */
}
.error-message:not(.hidden) {
    display: block;
}

/* 登录按钮 */
#login-btn {
    width: 100%;
    padding: 14px 24px;
    background-color: var(--memphis-yellow);
    color: var(--memphis-black);
    border: 2px solid var(--memphis-black);
    border-radius: 8px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: var(--shadow-hard-sm);
    transition: transform 0.1s, box-shadow 0.1s;
}

#login-btn:hover {
    transform: translate(-1px, -1px);
    box-shadow: 5px 5px 0px var(--memphis-black);
}

#login-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0px var(--memphis-black);
}

/* -------------------- 指导语页 -------------------- */
#instruction-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background-color: var(--memphis-gray);
}

.instruction-card {
    background-color: var(--memphis-white);
    border: var(--border-thick);
    border-radius: 16px;
    padding: 40px 36px;
    width: 90%;
    max-width: 600px;
    box-shadow: var(--shadow-hard);
}

.instruction-card h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--memphis-black);
    text-align: center;
}

#instruction-content p {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 14px;
    color: #333;
}

#instruction-content p:last-child {
    margin-bottom: 28px;
}

#start-exp-btn {
    display: block;
    width: 100%;
    padding: 14px 24px;
    background-color: var(--memphis-green);
    color: var(--memphis-black);
    border: 2px solid var(--memphis-black);
    border-radius: 8px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: var(--shadow-hard-sm);
    transition: transform 0.1s, box-shadow 0.1s;
}

#start-exp-btn:hover {
    transform: translate(-1px, -1px);
    box-shadow: 5px 5px 0px var(--memphis-black);
}

#start-exp-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0px var(--memphis-black);
}

/* -------------------- 知情同意书页 -------------------- */
#consent-page {
    min-height: 100vh;
    padding: 40px 16px;
    box-sizing: border-box;
}

/* 仅在激活时以flex居中（不能直接在#consent-page写display，
   否则ID优先级会覆盖.page的display:none导致页面常驻显示） */
#consent-page.active {
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.consent-card {
    background-color: var(--memphis-white);
    border: var(--border-thick);
    border-radius: 16px;
    padding: 36px 32px;
    width: 90%;
    max-width: 720px;
    box-shadow: var(--shadow-hard);
}

.consent-card h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--memphis-black);
    text-align: center;
}

.consent-subtitle {
    font-size: 16px;
    font-weight: 700;
    color: #555;
    text-align: center;
    margin-bottom: 20px;
}

/* 可滚动阅读区：内容较长，限制高度避免页面过长 */
.consent-content {
    max-height: 50vh;
    overflow-y: auto;
    border: 2px solid var(--memphis-black);
    border-radius: 8px;
    padding: 16px 20px;
    margin-bottom: 16px;
    background-color: #fdfdfa;
}

.consent-content h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--memphis-black);
    margin: 18px 0 8px;
}

.consent-content h3:first-child {
    margin-top: 0;
}

.consent-content p {
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 12px;
    color: #333;
}

.consent-content ul {
    font-size: 15px;
    line-height: 1.8;
    color: #333;
    margin: 0 0 12px;
    padding-left: 24px;
}

.consent-content li {
    margin-bottom: 4px;
}

.consent-salutation {
    font-weight: 700;
}

.consent-countdown-hint {
    font-size: 13px;
    color: #888;
    text-align: center;
    margin-bottom: 10px;
}

#consent-agree-btn {
    display: block;
    width: 100%;
    padding: 14px 24px;
    background-color: var(--memphis-green);
    color: var(--memphis-black);
    border: 2px solid var(--memphis-black);
    border-radius: 8px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: var(--shadow-hard-sm);
    transition: transform 0.1s, box-shadow 0.1s;
}

#consent-agree-btn:hover:not(:disabled) {
    transform: translate(-1px, -1px);
    box-shadow: 5px 5px 0px var(--memphis-black);
}

#consent-agree-btn:active:not(:disabled) {
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0px var(--memphis-black);
}

/* 倒计时未结束时：置灰不可点 */
#consent-agree-btn:disabled {
    background-color: #ccc;
    color: #666;
    cursor: not-allowed;
    box-shadow: none;
}

/* -------------------- Trial页面 -------------------- */
#trial-page {
    min-height: 100vh;
    background-color: var(--memphis-gray);
    padding-bottom: 40px;
}

/* --- 顶部进度条 --- */
.trial-progress-bar {
    position: relative;
    width: 100%;
    height: 36px;
    background-color: #ddd;
    border-bottom: var(--border-thick);
    overflow: hidden;
}

#progress-fill {
    height: 100%;
    width: 0%;
    background-color: var(--memphis-cyan);
    transition: width 0.5s ease;
    border-right: 3px solid var(--memphis-black);
}

#progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 14px;
    font-weight: 700;
    color: var(--memphis-black);
    z-index: 2;
    text-shadow: 0 0 4px rgba(255,255,255,0.8);
}

/* --- Scenario面板 --- */
.scenario-panel {
    background-color: #FFF9E6;
    border: var(--border-thick);
    border-radius: 12px;
    margin: 20px;
    padding: 20px 24px;
    box-shadow: var(--shadow-hard-sm);
}

.scenario-label {
    font-size: 14px;
    font-weight: 700;
    color: var(--memphis-black);
    margin-bottom: 10px;
    letter-spacing: 1px;
}

#scenario-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--memphis-black);
    margin-bottom: 8px;
}

#scenario-text {
    font-size: 15px;
    line-height: 1.7;
    color: #444;
}

/* --- Chat面板 --- */
.chat-panel {
    background-color: var(--memphis-white);
    border: var(--border-thick);
    border-radius: 12px;
    margin: 0 20px 20px 20px;
    box-shadow: var(--shadow-hard-sm);
    display: flex;
    flex-direction: column;
    height: 400px;
}

#chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* 消息气泡 - 通用样式 */
.chat-message {
    max-width: 75%;
    padding: 12px 16px;
    border: 2px solid var(--memphis-black);
    border-radius: 16px;
    font-size: 14px;
    line-height: 1.6;
    word-wrap: break-word;
    position: relative;
}

/* 用户消息 - 右侧对齐，黄色背景 */
.chat-message.user {
    align-self: flex-end;
    background-color: var(--chat-user-bg);
    border-bottom-right-radius: 4px;
}

/* AI消息 - 左侧对齐，灰色背景 */
.chat-message.ai {
    align-self: flex-start;
    background-color: var(--chat-ai-bg);
    border-bottom-left-radius: 4px;
}

/* 消息包装器 - 用于用户和AI消息的容器 */
.chat-message-wrapper {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 8px;
}

.chat-message-wrapper.user {
    align-items: flex-end;
}

.chat-message-wrapper.agent {
    align-items: flex-start;
}

/* 发送者标签 */
.message-sender-label {
    font-size: 12px;
    color: #888;
    font-weight: 500;
    padding: 0 4px;
}

/* 打字指示器：文字版"对方正在输入" */
#typing-indicator {
    padding: 8px 16px;
    align-self: flex-start;
    font-size: 15px;
    color: #999;
    font-style: italic;
}

/* 省略号循环动画：. → .. → ... */
#typing-indicator::after {
    content: '';
    display: inline-block;
    width: 1.5em;          /* 固定宽度，防止点数变化时文字左右抖动 */
    text-align: left;
    animation: typingDots 1.2s steps(1) infinite;
}

@keyframes typingDots {
    0%   { content: ''; }
    25%  { content: '.'; }
    50%  { content: '..'; }
    75%  { content: '...'; }
    100% { content: ''; }
}

/* 聊天输入区域 */
.chat-input-area {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    border-top: 2px solid #e0e0e0;
    background: #fafafa;
}

#send-btn {
    padding: 10px 28px;
    background-color: var(--memphis-yellow);
    color: var(--memphis-black);
    border: 2px solid var(--memphis-black);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: var(--shadow-hard-sm);
    transition: transform 0.1s, box-shadow 0.1s, background-color 0.2s;
}

#send-btn:hover:not(:disabled) {
    transform: translate(-1px, -1px);
    box-shadow: 5px 5px 0px var(--memphis-black);
}

#send-btn:active:not(:disabled) {
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0px var(--memphis-black);
}

/* 发送按钮禁用状态 */
#send-btn:disabled {
    background-color: #ccc;
    color: #888;
    border-color: #aaa;
    cursor: not-allowed;
    box-shadow: none;
}

/* --- Measures面板（评价量表） --- */
.measures-panel {
    background-color: var(--memphis-white);
    border: var(--border-thick);
    border-radius: 12px;
    margin: 0 20px 20px 20px;
    padding: 24px;
    box-shadow: var(--shadow-hard-sm);
}

.measures-panel h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--memphis-black);
}

/* 单个量表题目容器 */
.measure-item {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px dashed #ddd;
}

.measure-item:last-child {
    border-bottom: none;
}

/* 题目文本 */
.measure-question {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--memphis-black);
    line-height: 1.6;
}

/* Likert量表选项容器 */
.likert-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    flex-wrap: wrap;
}

/* Likert选项标签（1-7分） */
.likert-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    flex: 1;
    min-width: 36px;
}

/* Likert圆形按钮 */
.likert-option input[type="radio"] {
    appearance: none;
    -webkit-appearance: none;
    width: 40px;
    height: 40px;
    border: 2px solid var(--memphis-black);
    border-radius: 50%;
    background-color: var(--memphis-white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    color: var(--memphis-black);
    transition: background-color 0.2s, transform 0.1s;
    text-align: center;
    line-height: 36px;
}

/* Likert按钮选中状态 */
.likert-option input[type="radio"]:checked {
    background-color: var(--memphis-yellow);
    transform: scale(1.1);
}

/* Likert按钮悬停状态 */
.likert-option input[type="radio"]:hover:not(:checked) {
    background-color: #FFF3CD;
}

/* Likert分值标签 */
.likert-label {
    font-size: 12px;
    color: #666;
    text-align: center;
}

/* ============================================================
 *  Likert量表样式（与 trial.js createLikertScale 配套）
 *  结构: .likert-scale > .likert-anchor + .likert-buttons + .likert-anchor
 * ============================================================ */

/* Likert量表整体容器 - 水平排列：左锚点 + 按钮 + 右锚点 */
.likert-scale {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 12px;
    margin: 10px 0;
    width: 100%;
}

/* Likert锚点标签（"非常不同意" / "非常同意"） */
.likert-anchor {
    font-size: 11px;
    color: #999;
    white-space: nowrap;
    flex-shrink: 0;
}

/* Likert按钮容器 - 居中排列所有选项 */
.likert-buttons {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex: 1;
}

/* Likert按钮包装器（label元素） */
.likert-button-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    min-width: 36px;
}

/* Likert单选按钮（圆形） */
.likert-radio {
    appearance: none;
    -webkit-appearance: none;
    width: 36px;
    height: 36px;
    border: 2px solid var(--memphis-black);
    border-radius: 50%;
    background-color: var(--memphis-white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    line-height: 32px;
    margin: 0;
    transition: background-color 0.2s, transform 0.1s;
}

/* Likert单选按钮选中状态 */
.likert-radio:checked {
    background-color: var(--memphis-yellow);
    transform: scale(1.1);
}

/* Likert单选按钮悬停状态 */
.likert-radio:hover:not(:checked) {
    background-color: #FFF3CD;
}

/* Likert数字标签（1-7） */
.likert-number {
    font-size: 12px;
    color: #666;
    text-align: center;
    font-weight: 500;
}

/* 文本题输入框 */
.measure-textarea {
    width: 100%;
    min-height: 80px;
    padding: 12px;
    border: 2px solid var(--memphis-black);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    resize: vertical;
    outline: none;
    transition: border-color 0.2s;
}

.measure-textarea:focus {
    border-color: var(--memphis-cyan);
}

/* 提交评价按钮 */
/* 提交按钮共用样式：对话问卷 + 总问卷 */
#submit-trial-btn,
#submit-post-study-btn,
#submit-pre-study-btn {
    display: block;
    width: 100%;
    padding: 14px 24px;
    margin-top: 20px;
    background-color: var(--memphis-pink);
    color: var(--memphis-black);
    border: 2px solid var(--memphis-black);
    border-radius: 8px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: var(--shadow-hard-sm);
    transition: transform 0.1s, box-shadow 0.1s;
}

#submit-trial-btn:hover,
#submit-post-study-btn:hover,
#submit-pre-study-btn:hover {
    transform: translate(-1px, -1px);
    box-shadow: 5px 5px 0px var(--memphis-black);
}

#submit-trial-btn:active,
#submit-post-study-btn:active,
#submit-pre-study-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0px var(--memphis-black);
}

/* -------------------- 完成页 -------------------- */
#complete-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--memphis-gray);
    padding: 20px;
}

.complete-card {
    position: relative;
    background-color: var(--memphis-white);
    border: var(--border-thick);
    border-radius: 20px;
    padding: 48px 40px;
    width: 90%;
    max-width: 480px;
    box-shadow: var(--shadow-hard);
    text-align: center;
}

/* 庆祝装饰 */
.celebrate-decorate {
    margin-bottom: 16px;
}

.celebrate-star {
    font-size: 32px;
    color: var(--memphis-yellow);
    display: inline-block;
    margin: 0 8px;
    animation: starTwinkle 1.5s infinite ease-in-out;
}

.celebrate-star.star-1 {
    animation-delay: 0s;
}

.celebrate-star.star-2 {
    animation-delay: 0.3s;
    color: var(--memphis-pink);
}

.celebrate-star.star-3 {
    animation-delay: 0.6s;
    color: var(--memphis-green);
}

/* 星星闪烁动画 */
@keyframes starTwinkle {
    0%, 100% {
        transform: scale(1) rotate(0deg);
        opacity: 1;
    }
    50% {
        transform: scale(1.3) rotate(15deg);
        opacity: 0.7;
    }
}

.complete-card h2 {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--memphis-black);
}

.complete-card p {
    font-size: 16px;
    line-height: 1.8;
    color: #555;
    margin-bottom: 8px;
}

#completion-info {
    margin-top: 20px;
    padding: 16px;
    background-color: var(--memphis-gray);
    border-radius: 8px;
    font-size: 14px;
    color: #666;
    border: 2px dashed #ccc;
}

/* -------------------- 隐藏入口 -------------------- */
/* 右下角黄色三角形 - 管理员入口 */
#admin-trigger {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background-color: var(--memphis-yellow);
    border: 3px solid var(--memphis-black);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--memphis-black);
    cursor: pointer;
    box-shadow: var(--shadow-hard-sm);
    z-index: 100;
    transition: transform 0.2s, box-shadow 0.2s;
    user-select: none;
}

#admin-trigger:hover {
    transform: scale(1.15) translate(-2px, -2px);
    box-shadow: 6px 6px 0px var(--memphis-black);
}

/* 点击提示 */
#click-hint {
    position: fixed;
    bottom: 85px;
    right: 20px;
    padding: 6px 12px;
    background-color: var(--memphis-black);
    color: var(--memphis-white);
    font-size: 12px;
    border-radius: 6px;
    z-index: 100;
    white-space: nowrap;
}

#click-hint::after {
    content: "";
    position: absolute;
    bottom: -6px;
    right: 24px;
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 6px solid var(--memphis-black);
}

/* -------------------- 响应式适配 -------------------- */
@media (max-width: 768px) {
    /* 登录页卡片适配 */
    .login-card {
        padding: 32px 24px;
        border-radius: 16px 6px 16px 6px;
    }

    #study-title {
        font-size: 22px;
    }

    /* 知情同意书卡片适配 */
    .consent-card {
        padding: 24px 18px;
        width: 95%;
    }

    .consent-content {
        max-height: 46vh;
        padding: 12px 14px;
    }

    /* 指导语卡片适配 */
    .instruction-card {
        padding: 28px 20px;
        width: 95%;
    }

    #instruction-content p {
        font-size: 15px;
    }

    /* Trial页面适配 */
    .scenario-panel,
    .chat-panel,
    .measures-panel {
        margin: 12px;
    }

    .chat-panel {
        height: 320px;
    }

    /* Likert选项适配 */
    .likert-option input[type="radio"] {
        width: 36px;
        height: 36px;
        line-height: 32px;
        font-size: 12px;
    }

    /* 完成页适配 */
    .complete-card {
        padding: 32px 24px;
    }

    .complete-card h2 {
        font-size: 22px;
    }

    /* 隐藏入口适配 */
    #admin-trigger {
        width: 40px;
        height: 40px;
        font-size: 14px;
        bottom: 20px;
        right: 20px;
    }

    /* 孟菲斯装饰元素在小屏幕上缩小 */
    .memphis-dot.dot-1 { width: 40px; height: 40px; }
    .memphis-dot.dot-2 { width: 30px; height: 30px; }
    .memphis-dot.dot-3 { width: 55px; height: 55px; }
    .memphis-dot.dot-4 { width: 35px; height: 35px; }
}

@media (max-width: 480px) {
    .likert-options {
        gap: 4px;
    }

    .likert-option input[type="radio"] {
        width: 32px;
        height: 32px;
        line-height: 28px;
        font-size: 11px;
    }

    .chat-message {
        max-width: 85%;
        padding: 10px 12px;
        font-size: 13px;
    }
}

/* 对话提示区域 - 动态提示 */
.dialogue-prompt {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 13px;
    line-height: 1.5;
    margin: 0 12px 8px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.dialogue-prompt.hidden {
    display: none;
}

.tip-info {
    background-color: #FFF8E1;
    border: 1px solid #FFE082;
    color: #F57F17;
}

.tip-error {
    background-color: #FFEBEE;
    border: 1px solid #EF9A9A;
    color: #C62828;
}

.tip-warning {
    background-color: #FFF3E0;
    border: 1px solid #FFCC80;
    color: #E65100;
}

/* 单选题样式 */
.single-choice-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 8px;
}

.single-choice-option {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 14px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    background: #fff;
}

.single-choice-option:hover {
    border-color: #6366F1;
    background: #F3F4FF;
}

.single-choice-option.selected {
    border-color: #6366F1;
    background: #EEF2FF;
}

.single-choice-radio {
    margin-top: 2px;
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.single-choice-text {
    font-size: 14px;
    line-height: 1.5;
    color: #333;
}

/* 单选题"其他"选项的填写输入框 */
.single-choice-other-input {
    margin-top: 8px;
    margin-left: 32px;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

.single-choice-other-textarea {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    line-height: 1.5;
    resize: vertical;
    min-height: 60px;
    font-family: inherit;
    background: #fff;
    transition: border-color 0.2s ease;
}

.single-choice-other-textarea:focus {
    outline: none;
    border-color: #6366F1;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

/* 发送按钮冷却状态 */
.send-btn-cooldown {
    opacity: 0.5;
    cursor: not-allowed !important;
    background-color: #ccc !important;
}

/* 提示中的参考表达 */
.tip-reference {
    display: block;
    margin-top: 6px;
    padding-top: 6px;
    border-top: 1px dashed rgba(0, 0, 0, 0.15);
    font-size: 12px;
    font-weight: 600;
    opacity: 0.85;
}

/* 预填输入框 */
#chat-input.prefilled {
    background-color: #FFFDE7;
    border-color: #FDD835;
}

/* 聊天输入框 */
#chat-input {
  flex: 1;
  padding: 12px 16px;
  border: 2px solid #2C3E50;
  border-radius: 12px;
  font-size: 16px;
  outline: none;
  margin-right: 10px;
  background: #fff;
  /* ⚠️ textarea多行支持 */
  resize: none;
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-y: auto;
  line-height: 1.5;
  min-height: 48px;
  max-height: 120px;
  font-family: inherit;
}
#chat-input:disabled {
  background: #e0e0e0;
  color: #999;
}
#chat-input:focus {
  border-color: #FFD93D;
  box-shadow: 0 0 0 3px rgba(255, 217, 61, 0.3);
}

/* 问卷提示小字 */
.survey-tips {
    font-size: 13px;
    color: #888;
    line-height: 1.6;
    margin: 8px 0 16px;
    padding: 10px 14px;
    background: #f8f9fa;
    border-left: 3px solid #FFD93D;
    border-radius: 0 8px 8px 0;
}

/* 用户信息收集问卷面板 */
.pre-study-panel {
    padding: 20px;
    background: #fff;
    border: 2px solid var(--memphis-black);
    border-radius: 12px;
    margin: 20px 0;
}

.pre-study-panel h3 {
    margin-bottom: 4px;
}

/* 总问卷面板 */
.post-study-panel {
    padding: 20px;
    background: #fff;
    border: 2px solid var(--memphis-black);
    border-radius: 12px;
    margin: 20px 0;
}

.post-study-panel h3 {
    margin-bottom: 4px;
}