:root { color-scheme: light; font-family: "Microsoft YaHei", sans-serif; color: #193043; background: #f4f7f6; }
* { box-sizing: border-box; }
body { margin: 0; }
header { display: flex; justify-content: space-between; gap: 24px; align-items: center; padding: 28px 7vw; background: #103f4c; color: white; }
.header-actions { display: flex; flex-wrap: wrap; gap: 8px; }
h1, h2, p { margin: 0; }
h1 { margin: 5px 0 8px; font-size: 30px; }
h2 { font-size: 18px; }
.eyebrow { color: #acd8d1; letter-spacing: 2px; font-size: 12px; }
main { display: grid; grid-template-columns: 320px minmax(0, 1fr); gap: 22px; padding: 22px 7vw 48px; }
aside { display: flex; flex-direction: column; gap: 15px; }
.panel, .question-card, .workspace { background: white; border: 1px solid #d9e4e2; border-radius: 12px; box-shadow: 0 4px 15px #17404a12; }
.panel { display: grid; gap: 11px; padding: 16px; }
.workspace { min-height: 600px; padding: 18px; }
.workspace-head, .question-head, .question-actions, .options-head, .inline, .mode-row { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.workspace-head { margin-bottom: 15px; }
.workspace-head p, small, .status { color: #698086; font-size: 12px; }
label { display: grid; gap: 5px; color: #435b63; font-size: 13px; }
input, textarea, select, button { border: 1px solid #c8d9d7; border-radius: 7px; padding: 9px; font: inherit; }
textarea { resize: vertical; line-height: 1.55; }
button { cursor: pointer; background: #f7fbfa; color: #1b5961; font-weight: 600; }
button:hover { border-color: #3f8988; }
.primary { background: #16827f; color: white; border-color: #16827f; }
.danger { color: #a54343; }
.drop-zone { padding: 16px; border: 1px dashed #80aaa8; border-radius: 8px; background: #f5fbfa; cursor: pointer; }
.drop-zone input { display: none; }
.drop-zone span { font-weight: 700; color: #1b686b; }
.file-drop { padding: 9px; border: 1px dashed #a9c9c6; border-radius: 7px; background: #fbfefd; }
.file-drop.dragging, .drop-zone.dragging { border-color: #16827f; background: #eaf5f3; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { display: inline-flex; align-items: center; gap: 4px; border-radius: 20px; padding: 5px 7px 5px 9px; background: #eaf5f3; color: #286c6e; font-size: 12px; }
.chip-remove { padding: 0 4px; border: 0; background: transparent; color: #a54343; font-size: 16px; line-height: 1; }
.switches { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }
.switches label { display: flex; gap: 5px; align-items: center; }
.switches input { width: auto; }
summary { cursor: pointer; color: #286c6e; font-size: 13px; font-weight: 700; }
.details-grid { display: grid; gap: 8px; margin-top: 10px; }
.question-card { display: grid; gap: 12px; padding: 15px; margin-bottom: 13px; }
.question-layout { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 14px; }
.question-tree { align-self: start; max-height: calc(100vh - 180px); overflow: auto; padding: 10px; border: 1px solid #d9e4e2; border-radius: 9px; background: #f8fbfa; }
.tree-group { margin: 5px 0; }
.tree-group summary { padding: 5px 3px; }
.tree-items { display: grid; gap: 4px; padding-left: 8px; }
.tree-question-row { display: grid; grid-template-columns: minmax(0, 1fr) 30px 30px; gap: 3px; }
.tree-question { overflow: hidden; width: 100%; padding: 7px; text-align: left; text-overflow: ellipsis; white-space: nowrap; background: white; font-size: 12px; }
.tree-move { padding: 5px 2px; }
.tree-question.active { border-color: #16827f; background: #eaf5f3; color: #135f62; }
.answer-ocr { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 7px; align-items: end; padding: 10px; border-radius: 8px; background: #f5fbfa; }
.answer-ocr small { grid-column: 1 / -1; }
.answer-ocr .image-preview { grid-column: 1 / -1; }
.grid.two { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.option-row { display: grid; grid-template-columns: 30px 1fr 64px; gap: 7px; align-items: center; margin-top: 6px; }
.image-preview { display: flex; flex-wrap: wrap; gap: 7px; }
.image-item { display: grid; gap: 4px; max-width: 150px; }
.image-item img { width: 150px; height: 100px; object-fit: cover; border-radius: 6px; cursor: zoom-in; }
.image-item button { padding: 5px; font-size: 12px; }
.upload-preview { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.upload-preview .image-item { max-width: none; }
.upload-preview .image-item img { width: 100%; height: 70px; border: 1px solid #d9e4e2; }
.empty { padding: 70px 20px; text-align: center; color: #799095; }
.image-dialog { max-width: 92vw; max-height: 92vh; padding: 45px 14px 14px; border: 0; border-radius: 10px; box-shadow: 0 10px 35px #0005; }
.image-dialog::backdrop { background: #0008; }
.image-dialog img { display: block; max-width: 88vw; max-height: 82vh; object-fit: contain; }
.dialog-close { position: absolute; top: 10px; right: 10px; }
@media (max-width: 880px) { main { grid-template-columns: 1fr; padding: 15px; } header { padding: 20px 15px; align-items: flex-start; flex-direction: column; } .question-layout { grid-template-columns: 1fr; } .question-tree { max-height: 260px; } .grid.two { grid-template-columns: 1fr; } }

/* ========== Auth Overlay ========== */
body.locked main, body.locked header { filter: blur(3px); pointer-events: none; }
.auth-overlay { display: flex; position: fixed; inset: 0; z-index: 999; background: linear-gradient(135deg, #0d3340, #1a5c6e); justify-content: center; align-items: center; }
.auth-card { background: #fff; padding: 40px 32px; border-radius: 12px; width: 360px; max-width: 92vw; box-shadow: 0 20px 50px #0005; text-align: center; }
.auth-card h2 { font-size: 24px; margin-bottom: 4px; }
.auth-card p { color: #799095; margin-bottom: 20px; font-size: 14px; }
.auth-card input { display: block; width: 100%; margin-bottom: 10px; padding: 10px 12px; border: 1px solid #c0ccd6; border-radius: 6px; font-size: 15px; }
.auth-card input:focus { border-color: #36a3b8; outline: none; box-shadow: 0 0 0 3px #36a3b822; }
.login-error { color: #d8343b !important; font-size: 13px !important; min-height: 20px; }
.full-width { width: 100%; }

/* ========== Admin Header ========== */
.auth-user { color: #acd8d1; font-size: 13px; white-space: nowrap; }
.admin-menu-btn { background: transparent; border: 1px solid #acd8d1; color: #acd8d1; cursor: pointer; border-radius: 5px; padding: 6px 12px; font-size: 13px; white-space: nowrap; }
.admin-menu-btn:hover { background: #fff2; }

/* ========== Admin Modal ========== */
.admin-modal { display: flex; position: fixed; inset: 0; z-index: 1000; background: #0007; justify-content: center; align-items: center; }
.admin-modal-card { background: #f4f7f6; border-radius: 12px; width: 700px; max-width: 95vw; max-height: 90vh; overflow-y: auto; box-shadow: 0 20px 60px #0004; }
.admin-modal-head { display: flex; justify-content: space-between; align-items: center; padding: 20px 24px; background: #103f4c; color: #fff; border-radius: 12px 12px 0 0; position: sticky; top: 0; z-index: 1; }
.admin-modal-head h2 { font-size: 20px; }
.admin-modal-head .dialog-close { background: none; border: none; color: #fff; font-size: 22px; cursor: pointer; }
.admin-modal-body { padding: 20px 24px; }
.admin-section { background: #fff; border-radius: 8px; padding: 16px; margin-bottom: 16px; box-shadow: 0 1px 4px #0001; }
.admin-section h3 { margin: 0 0 12px; font-size: 16px; color: #103f4c; }
.user-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.user-table th { text-align: left; padding: 8px 6px; border-bottom: 2px solid #e8edf0; color: #799095; font-weight: 600; }
.user-table td { padding: 8px 6px; border-bottom: 1px solid #e8edf0; }
.pw-field { width: 140px; padding: 4px 6px; border: 1px solid #c0ccd6; border-radius: 3px; font-size: 12px; background: #fafafa; font-family: monospace; }
.user-table button { font-size: 11px; padding: 3px 8px; margin-right: 2px; }
.toggle-pw { background: #e8edf0; border: 1px solid #c0ccd6; cursor: pointer; border-radius: 3px; }
.toggle-pw:hover { background: #d0d8dd; }