/* SmartBank Agent - Multi-Theme System */

/* ── Light Theme (default) ─ Coursera/edX 学术白风格 */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-card: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --accent: #0f766e;
    --accent-dim: #ccfbf1;
    --accent-glow: rgba(15, 118, 110, 0.12);
    --border: #e2e8f0;
    --user-bg: #f0fdfa;
    --assistant-bg: #ffffff;
    --hero-gradient: linear-gradient(135deg, #0f766e 0%, #0891b2 50%, #0d9488 100%);
    --btn-gradient: linear-gradient(135deg, #0f766e, #0d9488);
    --btn-hover-gradient: linear-gradient(135deg, #0d9488, #0f766e);
    --grid-line: rgba(15, 118, 110, 0.05);
    --glow-top: rgba(15, 118, 110, 0.04);
    --glow-bottom: rgba(8, 145, 178, 0.03);
    --theme-name: 'Light';
}

/* ── Terminal Theme ─ Bloomberg/彭博终端风格 */
[data-theme='terminal'] {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: #1a2332;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --accent: #10b981;
    --accent-dim: #065f46;
    --accent-glow: rgba(16, 185, 129, 0.15);
    --border: #1e293b;
    --user-bg: #1e3a5f;
    --assistant-bg: #1a2332;
    --hero-gradient: linear-gradient(135deg, #10b981 0%, #06b6d4 50%, #3b82f6 100%);
    --btn-gradient: linear-gradient(135deg, #10b981, #059669);
    --btn-hover-gradient: linear-gradient(135deg, #059669, #047857);
    --grid-line: rgba(16, 185, 129, 0.03);
    --glow-top: rgba(16, 185, 129, 0.08);
    --glow-bottom: rgba(59, 130, 246, 0.06);
    --theme-name: 'Terminal';
}

/* ── Ocean Theme ─ Coursera/edX 学术蓝风格 */
[data-theme='ocean'] {
    --bg-primary: #0b1120;
    --bg-secondary: #0f1a2e;
    --bg-card: #142038;
    --text-primary: #e2e8f0;
    --text-secondary: #8b9dc3;
    --accent: #3b82f6;
    --accent-dim: #1e3a6e;
    --accent-glow: rgba(59, 130, 246, 0.15);
    --border: #1e3050;
    --user-bg: #1a2d52;
    --assistant-bg: #142038;
    --hero-gradient: linear-gradient(135deg, #3b82f6 0%, #06b6d4 50%, #8b5cf6 100%);
    --btn-gradient: linear-gradient(135deg, #3b82f6, #2563eb);
    --btn-hover-gradient: linear-gradient(135deg, #2563eb, #1d4ed8);
    --grid-line: rgba(59, 130, 246, 0.03);
    --glow-top: rgba(59, 130, 246, 0.08);
    --glow-bottom: rgba(139, 92, 246, 0.06);
}

/* ── Ember Theme ─ MasterClass 奢华金暖风格 */
[data-theme='ember'] {
    --bg-primary: #141008;
    --bg-secondary: #1a150d;
    --bg-card: #221c12;
    --text-primary: #f0e6d3;
    --text-secondary: #b8a88a;
    --accent: #f59e0b;
    --accent-dim: #78500a;
    --accent-glow: rgba(245, 158, 11, 0.15);
    --border: #2e2518;
    --user-bg: #2a2015;
    --assistant-bg: #221c12;
    --hero-gradient: linear-gradient(135deg, #f59e0b 0%, #ef4444 50%, #ec4899 100%);
    --btn-gradient: linear-gradient(135deg, #f59e0b, #d97706);
    --btn-hover-gradient: linear-gradient(135deg, #d97706, #b45309);
    --grid-line: rgba(245, 158, 11, 0.03);
    --glow-top: rgba(245, 158, 11, 0.08);
    --glow-bottom: rgba(239, 68, 68, 0.06);
}

/* ── Nebula Theme ─ Stripe/Revolut 未来紫风格 */
[data-theme='nebula'] {
    --bg-primary: #0c0818;
    --bg-secondary: #110e22;
    --bg-card: #181330;
    --text-primary: #e8e0f5;
    --text-secondary: #a094c0;
    --accent: #8b5cf6;
    --accent-dim: #4c2889;
    --accent-glow: rgba(139, 92, 246, 0.15);
    --border: #251e3e;
    --user-bg: #1e1840;
    --assistant-bg: #181330;
    --hero-gradient: linear-gradient(135deg, #8b5cf6 0%, #ec4899 50%, #f59e0b 100%);
    --btn-gradient: linear-gradient(135deg, #8b5cf6, #7c3aed);
    --btn-hover-gradient: linear-gradient(135deg, #7c3aed, #6d28d9);
    --grid-line: rgba(139, 92, 246, 0.03);
    --glow-top: rgba(139, 92, 246, 0.08);
    --glow-bottom: rgba(236, 72, 153, 0.06);
}

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

html,
body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* ── Layout ──────────────────────────── */
.chat-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 900px;
    margin: 0 auto;
}

/* ── Header ──────────────────────────── */
.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--accent), #059669);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
    color: #fff;
    letter-spacing: -1px;
    box-shadow: 0 0 16px var(--accent-glow);
    position: relative;
    overflow: hidden;
}

.logo-icon::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.15) 50%, transparent 70%);
    animation: logo-shine 3s infinite;
}

@keyframes logo-shine {
    0% {
        transform: translateX(-100%) rotate(45deg);
    }

    100% {
        transform: translateX(100%) rotate(45deg);
    }
}

.chat-header h1 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.subtitle {
    font-size: 12px;
    color: var(--text-secondary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.back-link {
    color: var(--accent);
    text-decoration: none;
    font-size: 13px;
    padding: 6px 12px;
    border: 1px solid var(--accent-dim);
    border-radius: 6px;
    transition: all 0.2s;
}

.back-link:hover {
    background: var(--accent-dim);
}



/* ── 历史记录面板 ──────────────────── */
.history-panel {
    position: absolute;
    top: 60px;
    right: 16px;
    width: 320px;
    max-height: 400px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    z-index: 100;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}

.history-header h3 {
    margin: 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.history-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.history-empty {
    text-align: center;
    color: var(--text-secondary);
    font-size: 13px;
    padding: 20px;
}

.history-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
}

.history-item:hover {
    background: var(--bg-secondary);
}

.history-item-info {
    flex: 1;
    min-width: 0;
}

.history-title {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.history-time {
    font-size: 11px;
    color: var(--text-secondary);
}

.history-delete {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    opacity: 0;
    transition: opacity 0.2s;
    padding: 4px;
}

.history-item:hover .history-delete {
    opacity: 0.6;
}

.history-delete:hover {
    opacity: 1 !important;
}

.icon-btn {
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 4px 8px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
    color: var(--text-primary);
}

.icon-btn:hover {
    border-color: var(--accent);
    background: var(--accent-dim);
}

/* ── Mode Bar ────────────────────────── */
.mode-bar {
    display: flex;
    align-items: center;
    padding: 6px 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.mode-buttons {
    display: flex;
    gap: 4px;
    overflow-x: auto;
    flex: 1;
}

.mode-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 5px 10px;
    border: 1px solid transparent;
    border-radius: 6px;
    background: none;
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    flex-shrink: 0;
}

.mode-btn:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.mode-btn.active {
    background: var(--accent-dim);
    color: var(--accent);
    border-color: var(--accent);
    font-weight: 500;
}

.mode-label {
    font-size: 11px;
}

/* ── Main Chat Area ──────────────────── */
.chat-main {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

/* ── Welcome Screen ──────────────────── */
.welcome {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    gap: 16px;
}

.welcome-icon {
    font-size: 48px;
    animation: welcome-pulse 3s infinite ease-in-out;
}

@keyframes welcome-pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

.welcome h2 {
    font-size: 22px;
    font-weight: 600;
    background: var(--hero-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.welcome>p {
    color: var(--text-secondary);
    font-size: 14px;
    max-width: 480px;
}

.suggestions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 8px;
    width: 100%;
    max-width: 520px;
}

.suggestion-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--bg-secondary);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    text-align: left;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.suggestion-btn:hover {
    border-color: var(--accent);
    background: var(--accent-glow);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--accent-glow);
}

.suggestion-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.suggestion-icon {
    font-size: 18px;
    flex-shrink: 0;
}

.powered-by {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 16px;
    opacity: 0.6;
}

/* ── Messages ────────────────────────── */
.messages {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.message {
    display: flex;
    gap: 12px;
    max-width: 100%;
}

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

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--bg-card);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
    border: 1px solid var(--border);
}

.message.user .message-avatar {
    background: var(--user-bg);
}

.message-body {
    max-width: 80%;
    min-width: 0;
}

.message.user .message-body {
    text-align: right;
}

.msg-content {
    background: var(--assistant-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px 16px;
    font-size: 14px;
    line-height: 1.7;
    word-break: break-word;
    position: relative;
}

.message.user .msg-content {
    background: linear-gradient(135deg, var(--user-bg), var(--bg-card));
    border-color: #2563eb;
    display: inline-block;
    text-align: left;
}

.msg-content p {
    margin-bottom: 6px;
}

.msg-content p:last-child {
    margin-bottom: 0;
}

.msg-content strong {
    color: var(--accent);
    font-weight: 600;
}

.msg-content code {
    background: var(--accent-glow);
    padding: 1px 5px;
    border-radius: 4px;
    font-size: 13px;
    font-family: 'SF Mono', 'Fira Code', monospace;
    color: var(--accent);
}

/* ── Enhanced Markdown Elements ───────── */

/* Headings */
.msg-content h1,
.msg-content h2,
.msg-content h3,
.msg-content h4,
.msg-content h5,
.msg-content h6 {
    margin: 16px 0 8px;
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-primary);
}

.msg-content h1:first-child,
.msg-content h2:first-child,
.msg-content h3:first-child {
    margin-top: 0;
}

.msg-content h1 {
    font-size: 1.5em;
    background: linear-gradient(135deg, var(--accent), #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    padding-bottom: 4px;
    border-bottom: 2px solid var(--accent-dim);
}

.msg-content h2 {
    font-size: 1.3em;
    color: var(--accent);
}

.msg-content h3 {
    font-size: 1.15em;
}

.msg-content h4 {
    font-size: 1.05em;
    color: var(--text-secondary);
}

.msg-content h5,
.msg-content h6 {
    font-size: 1em;
    color: var(--text-secondary);
}

/* Unordered List */
.msg-content ul.msg-list,
.msg-list {
    margin: 8px 0;
    padding-left: 24px;
    list-style: none;
}

.msg-content ul.msg-list li,
.msg-list li {
    position: relative;
    margin-bottom: 6px;
    padding-left: 16px;
    line-height: 1.6;
}

.msg-content ul.msg-list li::before,
.msg-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

/* Ordered List */
.msg-content ol.msg-ordered-list,
.msg-ordered-list {
    margin: 8px 0;
    padding-left: 28px;
    list-style: none;
    counter-reset: list-counter;
}

.msg-content ol.msg-ordered-list li,
.msg-ordered-list li {
    position: relative;
    margin-bottom: 6px;
    padding-left: 20px;
    line-height: 1.6;
    counter-increment: list-counter;
}

.msg-content ol.msg-ordered-list li::before,
.msg-ordered-list li::before {
    content: counter(list-counter) '.';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 600;
    font-size: 0.9em;
}

/* Code Block */
.msg-code-block {
    margin: 12px 0;
    border-radius: 10px;
    overflow: hidden;
    background: #1e293b;
    border: 1px solid #334155;
}

.msg-code-lang {
    padding: 6px 14px;
    background: #0f172a;
    color: #94a3b8;
    font-size: 11px;
    font-family: 'SF Mono', 'Fira Code', monospace;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid #334155;
}

.msg-code-block pre {
    margin: 0;
    padding: 14px;
    overflow-x: auto;
}

.msg-code-block code {
    background: none;
    padding: 0;
    color: #e2e8f0;
    font-size: 13px;
    font-family: 'SF Mono', 'Fira Code', monospace;
    line-height: 1.6;
}

/* Blockquote */
.msg-content blockquote.msg-blockquote,
.msg-blockquote {
    margin: 10px 0;
    padding: 12px 16px;
    background: var(--accent-glow);
    border-left: 4px solid var(--accent);
    border-radius: 0 8px 8px 0;
}

.msg-content blockquote.msg-blockquote p,
.msg-blockquote p {
    margin: 0 0 4px;
    color: var(--text-secondary);
    font-style: italic;
}

.msg-content blockquote.msg-blockquote p:last-child,
.msg-blockquote p:last-child {
    margin-bottom: 0;
}

/* Horizontal Rule */
.msg-content hr.msg-hr,
.msg-hr {
    margin: 16px 0;
    border: none;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-dim), transparent);
}

/* Links */
.msg-content a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px dashed var(--accent-dim);
    transition: all 0.2s;
}

.msg-content a:hover {
    color: #3b82f6;
    border-bottom-color: #3b82f6;
}

/* Inline Math */
.msg-content .msg-math,
.msg-math {
    background: var(--accent-glow);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Times New Roman', serif;
    font-style: italic;
    color: var(--accent);
}

/* ── Table ───────────────────────────── */
.msg-table {
    width: 100%;
    border-collapse: collapse;
    margin: 10px 0;
    font-size: 13px;
}

.msg-table th,
.msg-table td {
    padding: 6px 10px;
    border: 1px solid var(--border);
    text-align: left;
}

.msg-table th {
    background: var(--accent-dim);
    color: var(--accent);
    font-weight: 600;
    white-space: nowrap;
}

.msg-table td {
    background: var(--bg-secondary);
}

/* ── Tool Calls ──────────────────────── */
.tool-calls {
    margin-bottom: 8px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tool-call {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: var(--accent-glow);
    border: 1px solid var(--accent-dim);
    border-radius: 6px;
    font-size: 12px;
}

.tool-icon {
    font-size: 12px;
}

.tool-name {
    color: var(--accent);
    font-weight: 500;
}

.tool-args {
    color: var(--text-secondary);
    font-family: monospace;
    font-size: 11px;
}

/* ── Message Actions ─────────────────── */
.msg-actions {
    display: flex;
    gap: 4px;
    margin-top: 4px;
    opacity: 0;
    transition: opacity 0.2s;
}

.message:hover .msg-actions {
    opacity: 1;
}

.msg-action-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 12px;
    padding: 2px 4px;
    border-radius: 4px;
    transition: background 0.2s;
}

.msg-action-btn:hover {
    background: var(--bg-card);
}

/* ── Typing Indicator ────────────────── */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 12px 16px;
    background: var(--assistant-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    animation: bounce 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(1) {
    animation-delay: -0.32s;
}

.typing-indicator span:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes bounce {

    0%,
    80%,
    100% {
        transform: scale(0);
        opacity: 0.4;
    }

    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* ── Input Bar ───────────────────────── */
.chat-input {
    display: flex;
    gap: 10px;
    padding: 12px 20px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    flex-shrink: 0;
}

.chat-input textarea {
    flex: 1;
    resize: none;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px 14px;
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    line-height: 1.5;
    outline: none;
    transition: border-color 0.2s;
}

.chat-input textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.chat-input textarea::placeholder {
    color: var(--text-secondary);
}

.chat-input textarea:disabled {
    opacity: 0.5;
}

.chat-input button {
    padding: 10px 20px;
    border: none;
    border-radius: 10px;
    background: var(--btn-gradient);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.chat-input button svg {
    display: inline-block;
}

.send-loading-dots {
    display: inline-flex;
    gap: 4px;
    align-items: center;
}

.send-loading-dots span {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #fff;
    animation: sendDotPulse 1.2s infinite;
}

.send-loading-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.send-loading-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes sendDotPulse {

    0%,
    80%,
    100% {
        opacity: 0.3;
        transform: scale(0.8);
    }

    40% {
        opacity: 1;
        transform: scale(1.2);
    }
}

.chat-input button:hover:not(:disabled) {
    background: var(--btn-hover-gradient);
    box-shadow: 0 4px 12px var(--accent-glow);
}

.chat-input button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ── Responsive ──────────────────────── */
@media (max-width: 640px) {
    .chat-header {
        padding: 10px 14px;
    }

    .chat-main {
        padding: 12px;
    }

    .chat-input {
        padding: 10px 14px;
    }

    .suggestions {
        grid-template-columns: 1fr;
    }

    .message-body {
        max-width: 90%;
    }

    .mode-bar {
        padding: 6px 12px;
    }

    .pbl-grid {
        grid-template-columns: 1fr;
    }

    .generate-layout {
        flex-direction: column;
    }

    .generate-sidebar {
        width: 100%;
        max-height: 200px;
    }
}

/* ── Quiz Panel ───────────────────────── */
.quiz-config {
    display: flex;
    flex-direction: column;
    gap: 18px;
    width: 100%;
    max-width: 520px;
    margin-top: 16px;
}

.quiz-topic-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    flex: 1;
}

.quiz-topic-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 10px 8px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--bg-card);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 11px;
    color: var(--text-secondary);
    text-align: center;
}

.quiz-topic-card:hover {
    border-color: var(--topic-color, var(--accent));
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.quiz-topic-card.active {
    border-color: var(--topic-color, var(--accent));
    background: var(--accent-dim);
    color: var(--text-primary);
}

.quiz-topic-icon {
    font-size: 20px;
}

.quiz-topic-name {
    font-weight: 500;
    line-height: 1.3;
}

.config-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.config-row label {
    font-size: 13px;
    color: var(--text-secondary);
    width: 48px;
    flex-shrink: 0;
}

.config-row select {
    flex: 1;
    padding: 8px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 13px;
}

.btn-group {
    display: flex;
    gap: 6px;
}

.btn-option {
    padding: 8px 18px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-option:hover {
    border-color: var(--accent);
}

.btn-option.active {
    border-color: var(--accent);
    color: #fff;
    background: var(--btn-gradient);
}

.generate-btn {
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    background: var(--btn-gradient);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
}

.generate-btn:hover:not(:disabled) {
    background: var(--btn-hover-gradient);
    box-shadow: 0 4px 16px var(--accent-glow);
    transform: translateY(-1px);
}

.generate-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.generate-btn svg {
    transition: transform 0.2s;
}

.generate-btn:hover:not(:disabled) svg {
    transform: translateX(2px);
}

.btn-loading-text {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.quiz-area {
    max-width: 640px;
    margin: 0 auto;
}

.quiz-progress {
    display: flex;
    justify-content: space-between;
    margin-bottom: 16px;
    font-size: 13px;
    color: var(--text-secondary);
}

.quiz-score {
    color: var(--accent);
    font-weight: 600;
}

.quiz-question h3 {
    font-size: 16px;
    margin-bottom: 16px;
    line-height: 1.6;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.quiz-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s;
}

.quiz-option:hover {
    border-color: var(--accent);
}

.quiz-option.selected {
    border-color: var(--accent);
    background: var(--accent-dim);
}

.quiz-option.correct {
    border-color: var(--accent);
    background: var(--accent-glow);
}

.quiz-option.wrong {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.15);
}

.option-letter {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 13px;
    flex-shrink: 0;
}

.quiz-explanation {
    margin-top: 12px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: 8px;
    font-size: 13px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.quiz-actions {
    margin-top: 16px;
    text-align: center;
}

.quiz-final h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

.quiz-final p {
    color: var(--accent);
    font-size: 16px;
    margin-bottom: 16px;
}

/* ── PBL Dashboard ────────────────────── */
.pbl-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    max-width: 700px;
    margin: 16px auto 0;
}

.pbl-card {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    cursor: pointer;
    text-align: left;
    color: var(--text-primary);
    transition: all 0.2s;
}

.pbl-card:hover {
    border-color: var(--accent);
}

.pbl-card-header {
    display: flex;
    align-items: center;
    gap: 8px;
}

.pbl-card-icon {
    font-size: 20px;
}

.pbl-card-header h3 {
    font-size: 14px;
    font-weight: 600;
}

.pbl-card p {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.pbl-phases-preview {
    display: flex;
    gap: 4px;
    margin-top: 4px;
}

.phase-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    opacity: 0.6;
}

.pbl-phase-bar {
    display: flex;
    gap: 4px;
    padding: 6px 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
}

.phase-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 5px 10px;
    border: 1px solid transparent;
    border-radius: 6px;
    background: none;
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.phase-btn:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.phase-btn.active {
    background: var(--accent-dim);
    border-width: 1px;
    border-style: solid;
    font-weight: 500;
}

.phase-label {
    font-size: 11px;
}

.pbl-phase-info {
    padding: 16px;
    background: var(--bg-card);
    border-left: 3px solid var(--accent);
    border-radius: 8px;
    margin-bottom: 16px;
}

.pbl-phase-info h3 {
    font-size: 15px;
    margin-bottom: 4px;
}

.pbl-phase-info p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.pbl-hint {
    font-size: 12px;
    color: var(--accent);
    margin-top: 4px;
}

/* ── Generate Panel ──────────────────── */
.generate-input-area {
    display: flex;
    gap: 10px;
    width: 100%;
    max-width: 500px;
    margin-top: 16px;
}

.generate-input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
}

.generate-input:focus {
    border-color: var(--accent);
}

.generate-input::placeholder {
    color: var(--text-secondary);
}

.error-text {
    color: #ef4444;
    font-size: 13px;
    margin-top: 8px;
}

.generate-examples {
    margin-top: 20px;
    text-align: center;
}

.generate-examples p {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.example-chip {
    display: inline-block;
    padding: 5px 12px;
    margin: 4px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.example-chip:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.generate-layout {
    display: flex;
    gap: 16px;
    height: 100%;
}

.generate-sidebar {
    width: 260px;
    flex-shrink: 0;
    overflow-y: auto;
    padding: 16px 0;
}

.generate-sidebar h3 {
    font-size: 14px;
    margin-bottom: 12px;
    color: var(--accent);
}

.module-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.module-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 12px;
    border: 1px solid transparent;
    border-radius: 8px;
    background: none;
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s;
}

.module-item:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.module-item.active {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
}

.module-item.has-content .module-title::after {
    content: ' ✓';
    color: var(--accent);
}

.module-title {
    flex: 1;
}

.module-diff {
    font-size: 11px;
    color: var(--text-secondary);
    opacity: 0.6;
}

.generate-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}

.content-article h2 {
    font-size: 18px;
    margin-bottom: 8px;
}

.content-diff {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    background: var(--accent-dim);
    color: var(--accent);
    font-size: 11px;
    margin-bottom: 12px;
}

.content-body {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-primary);
}

.content-body br {
    display: block;
    margin-bottom: 8px;
}

.content-placeholder {
    text-align: center;
    color: var(--text-secondary);
    padding-top: 40px;
}

/* ══════════════════════════════════════
   INDEX PAGE - SmartBank Agent Homepage
   ══════════════════════════════════════ */

.index-page {
    position: relative;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Background effects */
.index-bg-grid {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(var(--grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

.index-bg-glow {
    position: fixed;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(120px);
    pointer-events: none;
    z-index: 0;
}

.index-bg-glow--top {
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    background: radial-gradient(circle, var(--glow-top) 0%, transparent 70%);
}

.index-bg-glow--bottom {
    bottom: -200px;
    right: -100px;
    background: radial-gradient(circle, var(--glow-bottom) 0%, transparent 70%);
}

/* Header */
.index-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(30, 41, 59, 0.6);
}

.index-header-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
}

.index-logo-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.index-logo {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
}

.index-logo-text {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.index-nav {
    display: flex;
    align-items: center;
    gap: 6px;
}

.index-nav-link {
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
}

.index-nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-card);
}

.index-nav-link--primary {
    background: var(--accent);
    color: #fff;
    font-weight: 600;
}

.index-nav-link--primary:hover {
    background: #059669;
    color: #fff;
}

/* Hero Section */
.index-hero {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    padding: 72px 24px 40px;
    text-align: center;
}

.index-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: 20px;
    background: var(--accent-glow);
    border: 1px solid var(--accent-dim);
    color: var(--accent);
    font-size: 12px;
    font-weight: 500;
    margin-bottom: 24px;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(1.5);
    }
}

.index-hero-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.title-gradient {
    background: var(--hero-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.index-hero-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto 8px;
    line-height: 1.6;
}

.index-hero-meta {
    font-size: 13px;
    color: var(--text-secondary);
    opacity: 0.65;
    margin: 0 auto 32px;
    letter-spacing: 0.3px;
}

/* Mode Cards */
.index-modes {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.index-mode-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 10px 16px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    min-width: 80px;
}

.index-mode-card:hover {
    border-color: var(--accent);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--accent-glow);
}

.index-mode-card.active {
    border-color: var(--accent);
    background: var(--accent-glow);
    color: var(--accent);
    box-shadow: 0 0 20px var(--accent-glow), inset 0 0 20px var(--accent-glow);
}

.index-mode-icon {
    font-size: 20px;
}

.index-mode-name {
    font-size: 11px;
    font-weight: 500;
    white-space: nowrap;
}

/* Input Bar */
.index-input-bar {
    margin-bottom: 20px;
}

.index-input-wrapper {
    display: flex;
    align-items: center;
    gap: 0;
    max-width: 680px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 4px 4px 4px 16px;
    transition: all 0.3s;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.index-input-wrapper:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow), 0 4px 16px rgba(0, 0, 0, 0.3);
}

.index-input-mode-badge {
    font-size: 18px;
    flex-shrink: 0;
    margin-right: 8px;
}

.index-input-wrapper textarea {
    flex: 1;
    resize: none;
    border: none;
    background: none;
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    line-height: 1.5;
    outline: none;
    padding: 10px 0;
}

.index-input-wrapper textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.index-send-btn {
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 12px;
    background: var(--btn-gradient);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
}

.index-send-btn:hover:not(:disabled) {
    transform: scale(1.05);
    box-shadow: 0 4px 12px var(--accent-glow);
}

.index-send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.index-send-loading {
    display: flex;
    gap: 3px;
}

.index-send-loading span {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #fff;
    animation: bounce 1.4s infinite ease-in-out;
}

.index-send-loading span:nth-child(1) {
    animation-delay: -0.32s;
}

.index-send-loading span:nth-child(2) {
    animation-delay: -0.16s;
}

/* Suggestions */
.index-suggestions {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}

.index-suggestion {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--bg-secondary);
    backdrop-filter: blur(8px);
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.25s;
}

.index-suggestion:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-glow);
    transform: translateY(-1px);
}

.index-suggestion:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.index-suggestion-icon {
    font-size: 14px;
}

/* Inline Chat Area */
.index-chat-area {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto 32px;
    padding: 0 24px;
}

.index-chat-messages {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: 400px;
    overflow-y: auto;
    padding: 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
}

.index-msg {
    display: flex;
    gap: 10px;
}

.index-msg.user {
    flex-direction: row-reverse;
}

.index-msg-avatar {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: var(--bg-card);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
}

.index-msg.user .index-msg-avatar {
    background: var(--user-bg);
}

.index-msg-body {
    max-width: 85%;
}

.index-msg-content {
    background: var(--assistant-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 10px 14px;
    font-size: 14px;
    line-height: 1.7;
}

.index-msg.user .index-msg-content {
    background: var(--user-bg);
    border-color: #2563eb;
}

.index-msg-content p {
    margin-bottom: 4px;
}

.index-msg-content p:last-child {
    margin-bottom: 0;
}

.index-msg-content strong {
    color: var(--accent);
}

.index-msg-content code {
    background: var(--accent-glow);
    padding: 1px 5px;
    border-radius: 4px;
    font-size: 13px;
    font-family: 'SF Mono', 'Fira Code', monospace;
    color: var(--accent);
}

.index-typing {
    display: flex;
    gap: 4px;
    padding: 10px 14px;
    background: var(--assistant-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
}

.index-typing span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    animation: bounce 1.4s infinite ease-in-out;
}

.index-typing span:nth-child(1) {
    animation-delay: -0.32s;
}

.index-typing span:nth-child(2) {
    animation-delay: -0.16s;
}

.index-chat-expand {
    display: block;
    text-align: center;
    margin-top: 12px;
    padding: 10px;
    color: var(--accent);
    font-size: 13px;
    text-decoration: none;
    border: 1px solid var(--accent-dim);
    border-radius: 10px;
    transition: all 0.2s;
}

.index-chat-expand:hover {
    background: var(--accent-glow);
    border-color: var(--accent);
}

/* Sections */
.index-section {
    position: relative;
    z-index: 1;
    max-width: 1100px;
    margin: 0 auto;
    padding: 36px 24px;
}

.index-section-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 20px;
}

.index-section-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0;
}

.index-section-count {
    font-size: 12px;
    color: var(--text-secondary);
    opacity: 0.6;
    letter-spacing: 0.3px;
}

.index-section-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    color: inherit;
}

.index-toggle-icon {
    color: var(--text-secondary);
    transition: transform 0.3s;
    display: flex;
}

.index-toggle-icon.open {
    transform: rotate(180deg);
}

/* Quick Grid */
.index-quick-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 12px;
}

.index-quick-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.index-quick-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: var(--card-accent, var(--accent));
    opacity: 0;
    transition: opacity 0.25s;
}

.index-quick-card:hover {
    border-color: var(--card-accent, var(--accent));
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.index-quick-card:hover::before {
    opacity: 1;
}

.index-quick-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.index-quick-card h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 2px;
}

.index-quick-card p {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Chapters Grid */
.index-chapters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 10px;
    margin-top: 12px;
}

.index-chapter-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.index-chapter-card::after {
    content: '\2192';
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0;
    font-size: 16px;
    color: var(--accent);
    transition: opacity 0.2s, transform 0.2s;
}

.index-chapter-card:hover {
    border-color: var(--accent);
    background: var(--accent-glow);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    padding-right: 36px;
}

.index-chapter-card:hover::after {
    opacity: 1;
    transform: translateY(-50%) translateX(-4px);
}

.index-chapter-num {
    font-size: 11px;
    font-weight: 700;
    color: var(--accent);
    opacity: 0.5;
    font-family: 'SF Mono', 'Fira Code', monospace;
    flex-shrink: 0;
    min-width: 20px;
}

.index-chapter-card--extra .index-chapter-num {
    display: none;
}

.index-chapter-icon {
    font-size: 22px;
    flex-shrink: 0;
}

.index-chapter-info h4 {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 2px;
}

.index-chapter-info p {
    font-size: 11px;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Features Grid */
.index-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.index-feature-card {
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    text-align: left;
    transition: all 0.25s;
    position: relative;
}

.index-feature-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.index-feature-num {
    font-size: 28px;
    font-weight: 800;
    color: var(--accent);
    opacity: 0.2;
    font-family: 'SF Mono', 'Fira Code', monospace;
    line-height: 1;
    margin-bottom: 8px;
}

.index-feature-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--accent);
}

.index-feature-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Footer */
.index-footer {
    position: relative;
    z-index: 1;
    padding: 48px 24px 32px;
    border-top: 1px solid var(--border);
}

.index-footer-main {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    max-width: 900px;
    margin: 0 auto 32px;
    text-align: left;
}

.index-footer-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 15px;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.index-footer-desc {
    font-size: 13px;
    color: var(--text-secondary);
    margin: 0;
}

.index-footer-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.index-footer-links a {
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.index-footer-links a:hover {
    color: var(--accent);
}

.index-footer-bottom {
    text-align: center;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.index-footer-copyright {
    font-size: 11px;
    color: var(--text-secondary);
    opacity: 0.5;
    margin-top: 4px;
}

.index-footer-tech {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.index-tech-badge {
    padding: 4px 10px;
    border-radius: 6px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    font-size: 11px;
    color: var(--text-secondary);
    font-weight: 500;
}

.index-footer-text {
    font-size: 12px;
    color: var(--text-secondary);
    opacity: 0.6;
}

/* Responsive for index page */
/* ── Theme Switcher ──────────────────── */
.theme-switcher {
    position: relative;
}

.theme-switcher-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.theme-switcher-btn:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.theme-color-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.theme-switcher-label {
    font-weight: 500;
}

.theme-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 200px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 6px;
    z-index: 200;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    animation: theme-dropdown-in 0.15s ease-out;
}

@keyframes theme-dropdown-in {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.theme-option {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 8px 10px;
    border: none;
    border-radius: 8px;
    background: none;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.15s;
    text-align: left;
}

.theme-option:hover {
    background: var(--bg-card);
}

.theme-option.active {
    background: var(--accent-glow);
}

.theme-option-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}

.theme-option-info {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.theme-option-name {
    font-size: 13px;
    font-weight: 500;
}

.theme-option-desc {
    font-size: 11px;
    color: var(--text-secondary);
}

/* ── Tools Panel ──────────────────── */
.tools-tab-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    padding: 4px;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.tools-tab {
    flex: 1;
    padding: 10px 16px;
    border: none;
    border-radius: 10px;
    background: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.tools-tab.active {
    background: var(--bg-card);
    color: var(--accent);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.tools-tab:hover:not(.active) {
    color: var(--text-primary);
}

.tools-count {
    font-size: 11px;
    padding: 2px 6px;
    border-radius: 10px;
    background: var(--accent-dim);
    color: var(--accent);
}

.tools-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.tools-stat {
    text-align: center;
    padding: 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
}

.tools-stat-num {
    display: block;
    font-size: 24px;
    font-weight: 700;
}

.tools-stat-label {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.tools-grid {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.tools-group-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.2s;
}

.tools-group-card:hover {
    border-color: var(--accent);
}

.tools-group-card.expanded {
    border-color: var(--accent);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.tools-group-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
}

.tools-group-icon {
    font-size: 24px;
}

.tools-group-info {
    flex: 1;
}

.tools-group-info h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.tools-group-info p {
    font-size: 12px;
    color: var(--text-secondary);
    margin: 2px 0 0;
}

.tools-group-count {
    font-size: 12px;
    padding: 2px 8px;
    border-radius: 10px;
    background: var(--accent-glow);
    color: var(--accent);
    font-weight: 600;
}

.tools-list {
    padding: 0 16px 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    animation: tools-slide-in 0.2s ease-out;
}

.tool-example {
    padding: 8px 12px;
    background: var(--accent-dim);
    border-radius: 8px;
    font-size: 12px;
    color: var(--accent);
    font-style: italic;
    margin-bottom: 4px;
}

@keyframes tools-slide-in {
    from {
        opacity: 0;
        transform: translateY(-6px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tool-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    background: var(--bg-secondary);
    border-radius: 8px;
}

.tool-name {
    font-size: 12px;
    padding: 2px 8px;
    background: var(--accent-glow);
    border-radius: 4px;
    color: var(--accent);
    font-family: 'SF Mono', 'Fira Code', monospace;
    white-space: nowrap;
}

.tool-desc {
    flex: 1;
    font-size: 12px;
    color: var(--text-secondary);
}

.tool-status-active {
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 10px;
    background: rgba(16, 185, 129, 0.15);
    color: #10b981;
    white-space: nowrap;
}

.tool-status-local {
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 10px;
    background: rgba(245, 158, 11, 0.15);
    color: #f59e0b;
    white-space: nowrap;
}

.tool-status-planned {
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 10px;
    background: rgba(148, 163, 184, 0.15);
    color: #94a3b8;
    white-space: nowrap;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-left: 3px solid;
    border-radius: 10px;
    padding: 14px;
}

.skill-card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}

.skill-icon {
    font-size: 20px;
}

.skill-card-header h3 {
    font-size: 14px;
    font-weight: 600;
    margin: 0;
}

.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.skill-tag {
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 6px;
    font-weight: 500;
}

.tools-arch {
    margin-top: 24px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
}

.tools-arch h3 {
    text-align: center;
    font-size: 15px;
    color: var(--text-primary);
    margin: 0 0 16px;
}

.arch-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    flex-wrap: wrap;
}

.arch-card {
    flex: 1;
    min-width: 180px;
    max-width: 240px;
    text-align: center;
    padding: 20px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.arch-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.arch-card-icon {
    display: block;
    font-size: 28px;
    margin-bottom: 8px;
}

.arch-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 6px;
}

.arch-desc {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.arch-connector {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
    opacity: 0.6;
}

@media (max-width: 640px) {
    .tools-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .index-hero {
        padding: 48px 16px 24px;
    }

    .index-hero-title {
        font-size: 32px;
    }

    .index-modes {
        gap: 6px;
    }

    .index-mode-card {
        padding: 8px 10px;
        min-width: 60px;
    }

    .index-mode-name {
        font-size: 10px;
    }

    .index-nav {
        gap: 2px;
    }

    .index-nav-link {
        padding: 5px 8px;
        font-size: 12px;
    }

    .index-quick-grid {
        grid-template-columns: 1fr 1fr;
    }

    .index-chapters-grid {
        grid-template-columns: 1fr;
    }

    .index-features-grid {
        grid-template-columns: 1fr;
    }

    .index-footer-main {
        grid-template-columns: 1fr;
        gap: 24px;
        text-align: center;
    }

    .index-footer-links {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px;
    }

    .arch-diagram {
        flex-direction: column;
    }

    .arch-card {
        max-width: 100%;
    }

    .quiz-topic-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ── 思考过程开关样式 ─────────────────────────────────── */
.thinking-toggle-container {
    display: flex;
    align-items: center;
}

.thinking-toggle-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 13px;
    color: var(--text-secondary);
}

.thinking-toggle-btn:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.thinking-toggle-btn.active {
    border-color: var(--accent);
    background: var(--accent-dim);
}

.thinking-icon {
    font-size: 16px;
}

.thinking-label {
    font-weight: 500;
}

.thinking-switch {
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.thinking-switch.on {
    background: var(--accent);
    color: white;
}

.thinking-switch.off {
    background: var(--border);
    color: var(--text-secondary);
}

/* ── 思考状态显示样式 ─────────────────────────────────── */
.thinking-status {
    display: flex;
    gap: 12px;
    padding: 16px 20px;
    animation: fadeIn 0.3s ease;
}

.thinking-status-avatar {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dim));
    flex-shrink: 0;
    animation: pulse 2s infinite;
}

.thinking-status-content {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--assistant-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    border-top-left-radius: 4px;
}

.thinking-status-indicator {
    display: flex;
    gap: 4px;
}

.thinking-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    animation: thinkingBounce 1.4s infinite ease-in-out both;
}

.thinking-dot:nth-child(1) {
    animation-delay: -0.32s;
}

.thinking-dot:nth-child(2) {
    animation-delay: -0.16s;
}

.thinking-dot:nth-child(3) {
    animation-delay: 0s;
}

.thinking-status-text {
    color: var(--text-secondary);
    font-size: 14px;
    font-style: italic;
}

@keyframes thinkingBounce {

    0%,
    80%,
    100% {
        transform: scale(0);
        opacity: 0.5;
    }

    40% {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

/* ── 响应式调整 ────────────────────────────────────────── */
@media (max-width: 640px) {
    .thinking-toggle-btn {
        padding: 4px 8px;
        font-size: 12px;
    }

    .thinking-label {
        display: none;
    }

    .thinking-status {
        padding: 12px 16px;
    }

    .thinking-status-avatar {
        width: 28px;
        height: 28px;
        font-size: 16px;
    }

    .thinking-status-content {
        padding: 8px 12px;
    }

    .thinking-status-text {
        font-size: 13px;
    }
}