/* CA470C 前台 */
:root {
    --bg: #0f1419; --bg-panel: #1a2332; --bg-input: #243044; --border: #2d3a4f;
    --text: #e8edf4; --text-muted: #8b9cb3; --accent: #3dd68c; --accent-hover: #2fb872;
    --danger: #f07178; --radius: 10px; --sidebar-w: 280px;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: "Segoe UI", "Microsoft YaHei", sans-serif; background: var(--bg); color: var(--text); line-height: 1.5; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.auth-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px; background: radial-gradient(ellipse at top, #1a2a3a 0%, var(--bg) 60%); }
.auth-card { width: 100%; max-width: 420px; background: var(--bg-panel); border: 1px solid var(--border); border-radius: 16px; padding: 36px 32px; }
.auth-card h1 { margin: 0 0 8px; font-size: 1.5rem; text-align: center; }
.auth-card .subtitle { text-align: center; color: var(--text-muted); font-size: .9rem; margin-bottom: 28px; }
.auth-card .badge { display: inline-block; background: rgba(61,214,140,.15); color: var(--accent); padding: 2px 10px; border-radius: 20px; font-size: .75rem; margin-left: 6px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; margin-bottom: 6px; font-size: .875rem; color: var(--text-muted); }
.form-group input { width: 100%; padding: 11px 14px; background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text); font-size: 1rem; }
.form-group input:focus { outline: none; border-color: var(--accent); }
.btn { display: inline-block; padding: 11px 20px; border: none; border-radius: var(--radius); font-size: 1rem; cursor: pointer; }
.btn-primary { width: 100%; background: var(--accent); color: #0a1612; font-weight: 600; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:disabled { opacity: .6; cursor: not-allowed; }
.alert { padding: 10px 14px; border-radius: var(--radius); margin-bottom: 18px; font-size: .9rem; }
.alert-error { background: rgba(240,113,120,.15); border: 1px solid var(--danger); color: var(--danger); }
.alert-success { background: rgba(61,214,140,.12); border: 1px solid var(--accent); color: var(--accent); }
.auth-footer { text-align: center; margin-top: 22px; font-size: .9rem; color: var(--text-muted); }

.app-shell { display: flex; height: 100vh; overflow: hidden; }
.sidebar { width: var(--sidebar-w); flex-shrink: 0; background: var(--bg-panel); border-right: 1px solid var(--border); display: flex; flex-direction: column; }
.sidebar-header { padding: 16px; border-bottom: 1px solid var(--border); }
.sidebar-header h1 { margin: 0 0 4px; font-size: 1.1rem; }
.sidebar-header .sub { font-size: .75rem; color: var(--text-muted); margin-bottom: 12px; }
.btn-new-chat { width: 100%; background: var(--bg-input); color: var(--text); border: 1px solid var(--border); padding: 10px; border-radius: var(--radius); cursor: pointer; }
.btn-new-chat:hover { border-color: var(--accent); color: var(--accent); }
.conv-list { flex: 1; overflow-y: auto; padding: 8px; }
.conv-item { padding: 10px 12px; border-radius: var(--radius); cursor: pointer; font-size: .875rem; color: var(--text-muted); margin-bottom: 4px; display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.conv-item span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.conv-item:hover { background: var(--bg-input); color: var(--text); }
.conv-item.active { background: var(--bg-input); color: var(--accent); border: 1px solid var(--border); }
.conv-item .del-btn { opacity: 0; background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 1rem; }
.conv-item:hover .del-btn { opacity: 1; }
.conv-item .del-btn:hover { color: var(--danger); }
.sidebar-footer { padding: 12px 16px; border-top: 1px solid var(--border); font-size: .8rem; color: var(--text-muted); }
.sidebar-footer .user-row { display: flex; justify-content: space-between; align-items: center; }
.main-panel { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.main-header { padding: 14px 20px; border-bottom: 1px solid var(--border); font-size: .95rem; color: var(--text-muted); }
.chat-area { flex: 1; overflow-y: auto; padding: 24px 20px; }
.empty-state { text-align: center; color: var(--text-muted); padding: 60px 20px; }
.empty-state h2 { color: var(--text); font-weight: 500; margin-bottom: 8px; }
.msg-block { margin-bottom: 28px; max-width: 820px; }
.msg-user { background: var(--bg-panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; margin-bottom: 12px; white-space: pre-wrap; word-break: break-word; }
.msg-user .label { font-size: .75rem; color: var(--accent); margin-bottom: 6px; font-weight: 600; }
.msg-assistant img { max-width: 100%; border-radius: var(--radius); border: 1px solid var(--border); }
.msg-meta { font-size: .75rem; color: var(--text-muted); margin-top: 6px; }
.msg-error { color: var(--danger); padding: 10px 14px; background: rgba(240,113,120,.1); border-radius: var(--radius); font-size: .9rem; }
.msg-pending { color: var(--text-muted); font-style: italic; font-size: .9rem; }
.input-area { padding: 16px 20px 20px; border-top: 1px solid var(--border); background: var(--bg-panel); }
.input-row { display: flex; gap: 10px; align-items: flex-end; }
.input-row textarea { flex: 1; min-height: 52px; max-height: 160px; padding: 12px 14px; background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text); font-family: inherit; font-size: .95rem; resize: vertical; }
.input-row textarea:focus { outline: none; border-color: var(--accent); }
.input-options { display: flex; gap: 12px; margin-top: 10px; font-size: .8rem; color: var(--text-muted); align-items: center; }
.input-options input { padding: 4px 8px; background: var(--bg-input); border: 1px solid var(--border); border-radius: 6px; color: var(--text); }
.input-options input[type=number] { width: 70px; }
.input-options input[type=text] { width: 90px; }
.btn-send { background: var(--accent); color: #0a1612; border: none; padding: 12px 22px; border-radius: var(--radius); font-weight: 600; cursor: pointer; }
.btn-send:disabled { opacity: .5; cursor: not-allowed; }
.tpl-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.tpl-chip { background: var(--bg-input); color: var(--text-muted); border: 1px solid var(--border); border-radius: 20px; padding: 5px 12px; font-size: .8rem; cursor: pointer; }
.tpl-chip:hover, .tpl-chip.on { border-color: var(--accent); color: var(--accent); }
.hint-en { font-size: .75rem; color: var(--text-muted); }
.loading-mask { display: none; position: fixed; inset: 0; background: rgba(15,20,25,.75); z-index: 9999; align-items: center; justify-content: center; }
.loading-mask.show { display: flex; }
.loading-box { background: var(--bg-panel); border: 1px solid var(--border); padding: 28px 36px; border-radius: 16px; text-align: center; }
.spinner { width: 36px; height: 36px; border: 3px solid var(--border); border-top-color: var(--accent); border-radius: 50%; margin: 0 auto 14px; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.btn-memory { width: 100%; margin-top: 8px; background: transparent; color: var(--text-muted); border: 1px dashed var(--border); padding: 8px; border-radius: var(--radius); cursor: pointer; font-size: .85rem; }
.btn-memory:hover { border-color: var(--accent); color: var(--accent); }
.memory-modal { position: fixed; inset: 0; background: rgba(15,20,25,.72); z-index: 10000; display: flex; align-items: center; justify-content: center; padding: 20px; }
.memory-modal[hidden] { display: none !important; }
.memory-dialog { width: 100%; max-width: 520px; background: var(--bg-panel); border: 1px solid var(--border); border-radius: 16px; padding: 22px 22px 18px; }
.memory-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.memory-head h2 { margin: 0; font-size: 1.15rem; }
.memory-close { background: none; border: none; color: var(--text-muted); font-size: 1.4rem; cursor: pointer; line-height: 1; }
.memory-close:hover { color: var(--text); }
.memory-desc { color: var(--text-muted); font-size: .85rem; margin: 0 0 16px; }
.memory-dialog .form-group textarea { width: 100%; padding: 10px 12px; background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text); font-family: inherit; resize: vertical; }
.memory-grid { display: flex; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; font-size: .85rem; color: var(--text-muted); }
.memory-grid input { width: 72px; margin-left: 6px; padding: 4px 8px; background: var(--bg-input); border: 1px solid var(--border); border-radius: 6px; color: var(--text); }
.memory-meta { font-size: .8rem; color: var(--text-muted); margin-bottom: 12px; }
.memory-actions { display: flex; align-items: center; gap: 12px; }
.memory-status { font-size: .85rem; color: var(--accent); }