/**
 * ============================================
 * chat.css - 聊天页面样式（简约高级优雅风格）
 * ============================================
 */

/* ============================================
   聊天消息区域
   ============================================ */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px 20px;
    scroll-behavior: smooth;
}

/* ============================================
   欢迎区域
   ============================================ */
.welcome-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100%;
    text-align: center;
    animation: fadeIn 0.8s var(--ease-out);
    padding: 20px;
}

.welcome-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--color-primary-subtle);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    animation: pulse 3s ease-in-out infinite;
}

[data-theme="dark"] .welcome-icon {
    background: var(--color-primary-subtle);
    border-color: var(--color-border);
}

.welcome-title {
    font-family: 'Playfair Display', var(--font-serif);
    font-size: 1.75rem;
    font-weight: 400;
    margin-bottom: 20px;
    letter-spacing: 0.02em;
    color: var(--color-text);
}

.welcome-text {
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-text-secondary);
    line-height: 1.9;
    max-width: 420px;
    letter-spacing: 0.01em;
}

[data-theme="dark"] .welcome-text { color: var(--color-text-secondary); }

/* ============================================
   消息气泡 - 简约优雅风格
   ============================================ */
.message {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    animation: messageSlideIn 0.4s var(--ease-out);
}

.message.user { flex-direction: row-reverse; }

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 0.85rem;
    font-weight: 500;
    background: var(--color-primary-subtle);
    border: 1px solid var(--color-border);
    flex-shrink: 0;
}

[data-theme="dark"] .message-avatar {
    background: var(--color-primary-subtle);
    border-color: var(--color-border);
    color: var(--color-primary);
}

.message-content { max-width: 75%; min-width: 0; }

.message-bubble {
    padding: 14px 18px;
    border-radius: 20px;
    font-size: 0.95rem;
    line-height: 1.7;
    word-wrap: break-word;
    word-break: break-word;
}

.message.ruoshui .message-bubble {
    background: var(--color-bg-card);
    box-shadow: var(--shadow-sm);
}

.message.user .message-bubble {
    background: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-accent) 100%);
    color: white;
}

/* 聊天气泡暗黑 */
[data-theme="dark"] .message.ruoshui .message-bubble {
    background: var(--color-bg-card);
    color: var(--color-text);
    box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .message.user .message-bubble {
    background: linear-gradient(135deg, var(--color-accent-dark) 0%, var(--color-accent) 100%);
    color: white;
}

/* ============================================
   移动端适配
   ============================================ */
@media (max-width: 768px) {
    .chat-messages { padding: 16px; }
    .message-content { max-width: 85%; }
    .message-bubble { padding: 12px 14px; font-size: 0.9rem; }

    .welcome-icon { width: 64px; height: 64px; }
    .welcome-icon svg { width: 28px; height: 28px; }
    .welcome-title { font-size: 1.4rem; }
    .welcome-text { font-size: 0.9rem; }
}

@media (max-width: 480px) {
    .message-content { max-width: 88%; }
}

/* ============================================
   Apple-inspired chat refinement layer
   ============================================ */
.chat-messages {
    padding: 34px clamp(18px, 4vw, 56px) 24px;
}

.welcome-container {
    max-width: 520px;
    margin: 0 auto;
    padding-bottom: 8vh;
}

.welcome-icon {
    display: none;
}

.welcome-title {
    font-family: var(--font-serif);
    font-size: clamp(1.48rem, 2.65vw, 1.9rem);
    font-weight: 300;
    letter-spacing: 0.045em;
    line-height: 1.36;
    margin-bottom: 16px;
    color: rgba(66, 46, 36, 0.72);
    display: inline-flex;
    justify-content: center;
    gap: 0.02em;
    min-height: 1.18em;
}

[data-theme="dark"] .welcome-title {
    color: rgba(240, 234, 228, 0.7);
}

.welcome-title-char {
    display: inline-block;
    opacity: 0;
    transform: translateY(8px);
    filter: blur(5px);
    animation: welcomeCharIn 0.72s var(--ease-spring) forwards;
    animation-delay: calc(var(--char-index) * 88ms + 120ms);
    will-change: opacity, transform, filter;
}

@keyframes welcomeCharIn {
    0% {
        opacity: 0;
        transform: translateY(8px);
        filter: blur(5px);
    }
    62% {
        opacity: 1;
        filter: blur(0);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
        filter: blur(0);
    }
}

.welcome-text {
    max-width: 460px;
    font-size: 1rem;
    line-height: 1.85;
    letter-spacing: 0;
}

/* 消息气泡 - 自我观察行内引导 */
.mindtrace-inline-bubble {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: 8px;
}

.mindtrace-inline-text {
    font-size: 0.95rem;
    color: var(--color-text);
    line-height: 1.6;
    flex-shrink: 1;
    min-width: 0;
}

.mindtrace-inline-btn {
    display: inline-block;
    padding: 2px 10px;
    background: var(--color-accent);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    flex-shrink: 0;
    transition: opacity 0.15s ease;
    -webkit-tap-highlight-color: transparent;
    outline: none;
}

.mindtrace-inline-btn:hover {
    opacity: 0.85;
}

.mindtrace-inline-btn:active {
    opacity: 0.7;
}

/* 测试结果解读卡片 */
.mindtrace-result-bubble {
    padding: 16px 18px;
    max-width: 300px;
}

.mindtrace-result-bubble .mindtrace-result-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 12px;
    text-align: center;
}

.mindtrace-result-bubble .mindtrace-result-metrics {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 10px;
}

.mindtrace-result-bubble .mindtrace-result-metric {
    text-align: center;
    min-width: 50px;
}

.mindtrace-result-bubble .mindtrace-result-val {
    display: block;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-accent);
}

.mindtrace-result-bubble .mindtrace-result-label {
    font-size: 0.7rem;
    color: var(--color-text-tertiary);
}

.mindtrace-result-bubble .mindtrace-result-text {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    text-align: center;
}

.welcome-disclaimer {
    max-width: 430px;
    margin: 18px auto 0;
    font-size: 0.78rem;
    line-height: 1.65;
}

.message {
    display: grid;
    grid-template-columns: var(--chat-avatar-size) minmax(0, 1fr) var(--chat-avatar-size);
    max-width: 860px;
    margin-left: auto;
    margin-right: auto;
    column-gap: var(--chat-avatar-gap);
    margin-bottom: 18px;
    --chat-avatar-size: 32px;
    --chat-avatar-gap: 10px;
    align-items: flex-start;
}

.message.user {
    flex-direction: initial;
}

.message-avatar {
    grid-column: 1;
    grid-row: 1;
    width: var(--chat-avatar-size);
    height: var(--chat-avatar-size);
    background: var(--material-bg);
    border-color: var(--material-border);
}

.message-content {
    grid-column: 2;
    grid-row: 1;
    width: fit-content;
    max-width: min(640px, 100%);
    min-width: 0;
}

.message.ruoshui .message-content {
    justify-self: start;
}

.message.user .message-avatar {
    grid-column: 3;
}

.message.user .message-content {
    justify-self: end;
}

.message.user .message-bubble {
    margin-left: auto;
}

.message-bubble {
    padding: 13px 16px;
    border-radius: 18px;
    font-size: 0.96rem;
    line-height: 1.68;
    min-height: 1.68em;
}

.message-bubble.is-streaming::after {
    content: '';
    display: inline-block;
    width: 0.42em;
    height: 1em;
    margin-left: 2px;
    border-radius: 1px;
    background: currentColor;
    opacity: 0.32;
    vertical-align: -0.12em;
    animation: caretBlink 1s steps(2, start) infinite;
}

.message-bubble.is-streaming {
    white-space: pre-wrap;
}

@keyframes caretBlink {
    50% { opacity: 0; }
}

.message.ruoshui .message-bubble {
    background: var(--material-bg-strong);
    border: 1px solid var(--material-border);
    box-shadow: none;
}

.message.user .message-bubble {
    background: var(--color-text);
    color: var(--color-bg-card);
}

[data-theme="dark"] .message.user .message-bubble {
    background: var(--color-text);
    color: var(--color-bg);
}

.message.ruoshui .message-bubble p,
.message.user .message-bubble p {
    margin: 0 0 0.75em;
}

.message.ruoshui .message-bubble p:last-child,
.message.user .message-bubble p:last-child {
    margin-bottom: 0;
}

.ai-disclaimer {
    margin-top: 6px;
    padding-left: 2px;
    font-size: 0.72rem;
    transition: opacity var(--duration-normal) var(--ease-smooth), transform var(--duration-normal) var(--ease-smooth);
}

.message.message-streaming .ai-disclaimer {
    opacity: 0;
    visibility: hidden;
    transform: translateY(-2px);
}

.conversation-feedback {
    display: flex;
    align-items: center;
    flex-wrap: nowrap;
    gap: 6px;
    margin-top: 8px;
    padding-left: 2px;
    max-width: 100%;
    overflow-x: auto;
    scrollbar-width: none;
    white-space: nowrap;
}

.conversation-feedback::-webkit-scrollbar {
    display: none;
}

.feedback-title {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
    color: var(--color-text-tertiary);
    font-size: 0.72rem;
    line-height: 1.2;
}

.feedback-chip {
    appearance: none;
    flex: 0 0 auto;
    min-height: 28px;
    padding: 0 10px;
    border: 1px solid var(--material-border);
    border-radius: 14px;
    background: var(--material-bg);
    color: var(--color-text-secondary);
    font-size: 0.76rem;
    line-height: 1;
    white-space: nowrap;
    cursor: pointer;
    transition:
        background var(--duration-fast) var(--ease-smooth),
        color var(--duration-fast) var(--ease-smooth),
        border-color var(--duration-fast) var(--ease-smooth);
}

.feedback-chip:hover {
    color: var(--color-text);
    border-color: rgba(var(--color-primary-rgb), 0.28);
    background: var(--material-bg-strong);
}

.feedback-chip.selected {
    color: var(--color-text);
    border-color: rgba(var(--color-primary-rgb), 0.42);
    background: rgba(var(--color-primary-rgb), 0.08);
}

.feedback-chip:disabled {
    cursor: default;
    opacity: 0.62;
}

.conversation-feedback.is-submitted .feedback-chip:not(.selected) {
    display: none;
}

.feedback-status {
    min-height: 16px;
    color: var(--color-text-tertiary);
    font-size: 0.72rem;
}

.message.ruoshui.typing-message {
    margin-bottom: 16px;
}

.message.ruoshui.typing-message .message-content {
    max-width: min(92px, 100%);
}

.message.ruoshui.typing-message .message-bubble {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    min-width: 66px;
    min-height: 38px;
    padding: 11px 16px;
    border-radius: 18px;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.88), rgba(255, 255, 255, 0.64)),
        var(--material-bg-strong);
    border-color: rgba(var(--color-primary-rgb), 0.1);
    box-shadow: 0 8px 22px rgba(44, 24, 16, 0.055);
}

.message.ruoshui.typing-message .message-bubble::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(105deg, transparent 0%, rgba(232, 150, 91, 0.13) 44%, transparent 72%);
    transform: translateX(-110%);
    animation: thinkingSweep 1.9s var(--ease-smooth) infinite;
}

[data-theme="dark"] .message.ruoshui.typing-message .message-bubble {
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.035)),
        var(--material-bg-strong);
    border-color: rgba(232, 150, 91, 0.14);
    box-shadow: 0 10px 26px rgba(0, 0, 0, 0.2);
}

.typing-dots {
    position: relative;
    z-index: 1;
    gap: 6px;
    height: 16px;
}

.typing-dots span {
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    animation-duration: 1.45s;
}

@keyframes thinkingSweep {
    0% {
        transform: translateX(-110%);
    }
    58%, 100% {
        transform: translateX(110%);
    }
}

@media (max-width: 768px) {
    .chat-messages {
        padding: 24px 14px 18px;
    }

    .welcome-title {
        font-size: clamp(1.42rem, 6.6vw, 1.82rem);
        line-height: 1.38;
    }

    .message {
        max-width: 100%;
        --chat-avatar-size: 30px;
        --chat-avatar-gap: 8px;
    }

    .message-avatar {
        width: 30px;
        height: 30px;
    }

    .message-bubble {
        border-radius: 17px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .welcome-title-char {
        opacity: 1;
        transform: none;
        filter: none;
        animation: none;
    }
}