.sandbox-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background: rgba(6, 13, 23, 0.82);
    backdrop-filter: blur(6px);
}
.sandbox-overlay[hidden] { display: none; }

.sandbox-modal {
    width: 100%;
    max-width: 640px;
    height: min(720px, 88vh);
    height: min(720px, 88dvh);
    max-height: 88vh;
    display: flex;
    flex-direction: column;
    background: #0d1c2b;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
}
.sandbox-modal::before {
    content: "";
    display: block;
    height: 3px;
    background: var(--grad);
    flex-shrink: 0;
}

.sandbox-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.1rem 1.5rem;
    border-bottom: 1px solid var(--border);
}
.sandbox-title {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--ink);
}
.sandbox-sub {
    font-size: 0.78rem;
    color: var(--muted);
    margin-top: 0.15rem;
}
.sandbox-round {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--tech-blue);
    white-space: nowrap;
}
.sandbox-close {
    background: none;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--muted);
    width: 32px; height: 32px;
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    transition: var(--transition);
    flex-shrink: 0;
}
.sandbox-close:hover { color: var(--ink); border-color: var(--tech-teal); }

.sandbox-body {
    flex: 1 1 0;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-height: 280px;
}

/* 场景选择 */
.sandbox-scenarios { display: flex; flex-direction: column; gap: 1rem; }
.sandbox-scenario-btn {
    text-align: left;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1.25rem 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-sans);
    color: var(--ink);
}
.sandbox-scenario-btn:hover { border-color: var(--tech-blue); transform: translateX(4px); }
.sandbox-scenario-btn .sc-name { font-weight: 700; font-size: 1rem; display: block; margin-bottom: 0.3rem; }
.sandbox-scenario-btn .sc-desc { font-size: 0.85rem; color: var(--muted); display: block; line-height: 1.5; }

/* 聊天气泡 */
.sb-msg {
    max-width: 88%;
    padding: 0.85rem 1.1rem;
    border-radius: 8px;
    font-size: 0.92rem;
    line-height: 1.6;
    color: var(--ink);
}
.sb-msg .sb-sender {
    display: block;
    font-size: 0.72rem;
    color: var(--muted);
    margin-bottom: 0.3rem;
    letter-spacing: 0.03em;
}
.sb-msg.ai {
    align-self: flex-start;
    background: rgba(76, 127, 242, 0.1);
    border: 1px solid rgba(76, 127, 242, 0.25);
    border-bottom-left-radius: 2px;
}
.sb-msg.role2 {
    align-self: flex-start;
    background: rgba(105, 172, 132, 0.1);
    border: 1px solid rgba(105, 172, 132, 0.28);
    border-bottom-left-radius: 2px;
}
.sb-msg.user {
    align-self: flex-end;
    background: var(--border);
    border-bottom-right-radius: 2px;
}
.sb-msg.narrator {
    align-self: center;
    max-width: 100%;
    background: transparent;
    border: 1px dashed var(--border);
    color: var(--muted);
    font-size: 0.82rem;
    text-align: center;
}
/* 多模态线索 chip */
.sb-meta {
    align-self: flex-start;
    font-size: 0.75rem;
    color: var(--tech-blue);
    background: rgba(76, 127, 242, 0.07);
    border: 1px dashed rgba(76, 127, 242, 0.35);
    border-radius: 4px;
    padding: 0.4rem 0.75rem;
    line-height: 1.5;
}
/* 督导 / 教练反馈 chip */
.sb-feedback {
    align-self: stretch;
    font-size: 0.8rem;
    line-height: 1.55;
    color: #b8e0c8;
    background: rgba(105, 172, 132, 0.08);
    border-left: 2px solid var(--tech-green);
    border-radius: 0 4px 4px 0;
    padding: 0.6rem 0.9rem;
}

/* 建议回复 */
.sandbox-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0 1.5rem 0.75rem;
}
.sb-suggestion {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 50px;
    color: var(--muted);
    font-family: var(--font-sans);
    font-size: 0.8rem;
    padding: 0.45rem 1rem;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}
.sb-suggestion:hover { border-color: var(--tech-blue); color: var(--ink); }

/* 输入栏 */
.sandbox-inputbar {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 1rem 1.5rem 1.25rem;
    border-top: 1px solid var(--border);
}
.sb-modal-icon {
    width: 36px; height: 36px;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--muted);
    background: none;
    cursor: pointer;
    transition: var(--transition);
}
.sb-modal-icon:hover { border-color: var(--tech-blue); color: var(--tech-blue); }
.sandbox-input {
    flex: 1;
    background: var(--canvas);
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: 0.7rem 1.2rem;
    color: var(--ink);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    transition: var(--transition);
    min-width: 0;
}
.sandbox-input:focus { outline: none; border-color: var(--tech-blue); }
.sandbox-send {
    background: var(--grad);
    color: #081018;
    border: none;
    border-radius: 50px;
    font-family: var(--font-sans);
    font-weight: 700;
    font-size: 0.88rem;
    padding: 0.7rem 1.4rem;
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
}
.sandbox-send:hover { opacity: 0.9; }
.sandbox-send:disabled, .sandbox-input:disabled { opacity: 0.4; cursor: not-allowed; }

/* 评估结果面板 */
.sandbox-eval {
    border-top: 1px solid var(--border);
    padding: 1.5rem;
    background: rgba(17, 34, 51, 0.6);
}
.sandbox-eval-title {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    color: var(--ink);
    margin-bottom: 1.1rem;
}
.sb-eval-row { margin-bottom: 0.9rem; }
.sb-eval-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.82rem;
    color: var(--muted);
    margin-bottom: 0.35rem;
}
.sb-eval-info b { color: var(--ink); font-weight: 600; }
.sb-eval-bar {
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
}
.sb-eval-fill {
    height: 100%;
    background: var(--grad);
    border-radius: 3px;
}
.sandbox-eval-note {
    font-size: 0.82rem;
    color: var(--muted);
    line-height: 1.6;
    margin: 1rem 0 1.25rem;
    border-left: 2px solid var(--tech-blue);
    padding-left: 0.9rem;
}
.sandbox-eval-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }


.sandbox-overlay{--ink:#edf5fc;--muted:#b0c3d5;--border:#2b435a;--surface:#142739;--canvas:#091927;--tech-blue:#62b9ff;--tech-teal:#52d7ce;--tech-green:#7fcea5;--grad:linear-gradient(115deg,#008cff,#4edbbb);--font-sans:var(--sans,system-ui,sans-serif);--font-serif:var(--sans,system-ui,sans-serif);--transition:all .2s ease;color:var(--ink);font-family:var(--font-sans)}
.sandbox-head,.sandbox-inputbar,.sandbox-suggestions{flex-shrink:0}.sandbox-body{min-height:0;overscroll-behavior:contain}.sandbox-body>*{flex-shrink:0}.sandbox-eval{overflow:auto;flex-shrink:1}.sandbox-sub,.sandbox-round,.sb-suggestion,.sb-feedback,.sandbox-eval-note{font-size:14px}.sb-msg,.sandbox-input{font-size:16px}.sandbox-overlay button:focus-visible,.sandbox-overlay a:focus-visible{outline:2px solid #62b9ff;outline-offset:3px}
@media(max-width:600px){.sandbox-overlay{padding:12px}.sandbox-modal{height:min(720px,92vh);height:min(720px,92dvh);max-height:92dvh}.sandbox-head,.sandbox-body,.sandbox-inputbar,.sandbox-eval{padding:16px}.sandbox-title{font-size:16px}.sandbox-round{font-size:12px}.sandbox-head{gap:8px}.sandbox-suggestions{padding:0 16px 12px}.sandbox-input{padding:10px 12px}.sandbox-send{padding:10px 16px}}