/* 完形填空练习 · 试卷答题卡设计系统（前缀 clz-）
   浅色：试卷白 + 深蓝 + 红笔；深色：深墨蓝 + 亮蓝 + 亮红 */
.clz-page, .clz-modal, .ws-toast {
    --clz-bg: #fffdf7; --clz-paper: #ffffff; --clz-ink: #222b38; --clz-sub: #788291;
    --clz-brand: #1f3a68; --clz-red: #d3453b; --clz-green: #23805c; --clz-line: #e2e5e9;
    --clz-fill: #f5f7fa; --clz-shadow: 0 10px 26px rgba(31,58,104,.09);
    --clz-font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
}
:root[data-theme="dark"] .clz-page, :root[data-theme="dark"] .clz-modal, :root[data-theme="dark"] .ws-toast {
    --clz-bg: #141a24; --clz-paper: #1b2533; --clz-ink: #e7edf7; --clz-sub: #9aabc0;
    --clz-brand: #a8c4ef; --clz-red: #ff9b91; --clz-green: #6fd0a4; --clz-line: #2c3b4f;
    --clz-fill: #202d3e; --clz-shadow: 0 14px 32px rgba(0,0,0,.34);
}
.clz-page { background: var(--clz-bg); color: var(--clz-ink); font-family: var(--clz-font);
    font-size: 14.5px; line-height: 1.85; padding-bottom: 56px; }
.clz-wrap { max-width: 1160px; margin: 0 auto; padding: 0 20px; }
.clz-page .detail-breadcrumb { padding: 18px 0 0; font-size: 13px; color: var(--clz-sub); }
.clz-page .detail-breadcrumb a { color: var(--clz-brand); text-decoration: none; }
.clz-page .detail-breadcrumb .sep { margin: 0 8px; }
.clz-page b { font-weight: 700; }
.clz-kicker { font-size: 11px; letter-spacing: .16em; color: var(--clz-red); }

/* 首屏 */
.clz-hero { display: grid; grid-template-columns: 1.55fr .58fr; gap: 22px; margin: 22px 0 20px; }
.clz-hero-copy { background: var(--clz-paper); border: 1px solid var(--clz-line); border-radius: 3px;
    padding: 28px 30px; box-shadow: var(--clz-shadow); border-top: 5px solid var(--clz-brand); }
.clz-hero h1 { font-size: clamp(24px, 2.9vw, 34px); line-height: 1.4; margin: 10px 0 8px; }
.clz-sub { font-size: 14px; line-height: 1.95; color: var(--clz-sub); margin: 0 0 18px; max-width: 690px; }
.clz-sub b { color: var(--clz-brand); }
.clz-page select { font: inherit; color: var(--clz-ink); background: var(--clz-paper);
    border: 1px solid var(--clz-line); border-radius: 3px; padding: 8px 10px; outline: none; box-sizing: border-box; }
.clz-field { display: flex; flex-direction: column; gap: 5px; font-size: 11.5px; color: var(--clz-sub); }
.clz-hero-form { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; }
.clz-hero-form .clz-field { flex: 1 1 160px; }
.clz-hero-form .clz-field select { width: 100%; }
.clz-btn { font: inherit; font-size: 13px; font-weight: 600; cursor: pointer; border: 1px solid var(--clz-line);
    background: var(--clz-paper); color: var(--clz-ink); border-radius: 3px; padding: 9px 15px; white-space: nowrap; }
.clz-btn:hover:not(:disabled) { border-color: var(--clz-brand); }
.clz-btn:disabled { opacity: .5; cursor: not-allowed; }
.clz-btn--main { background: var(--clz-brand); border-color: var(--clz-brand); color: #fff; }
.clz-btn--main:hover { filter: brightness(1.15); }
.clz-btn--ai { background: var(--clz-green); border-color: var(--clz-green); color: #fff; }
.clz-hero-meta { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 14px; font-size: 11.5px; color: var(--clz-sub); }
.clz-score { background: var(--clz-brand); color: #fff; border-radius: 3px; padding: 16px 18px; box-shadow: var(--clz-shadow); }
.clz-score-h { font-size: 10px; letter-spacing: .14em; opacity: .8; border-bottom: 1px solid rgba(255,255,255,.24); padding-bottom: 9px; }
.clz-score-main { display: flex; align-items: baseline; gap: 8px; margin: 12px 0 10px; }
.clz-score-main b { font: 700 40px Georgia, serif; }
.clz-score-main span { font-size: 12px; opacity: .82; }
.clz-score-row { display: flex; justify-content: space-between; border-top: 1px solid rgba(255,255,255,.18); padding: 6px 0; font-size: 12px; }
.clz-state { margin-top: 12px; font-size: 11px; text-align: center; background: rgba(255,255,255,.14); border-radius: 2px; padding: 4px; }

/* 试卷 */
.clz-layout { display: grid; grid-template-columns: 1.5fr .6fr; gap: 18px; align-items: start; }
.clz-paper, .clz-panel { background: var(--clz-paper); border: 1px solid var(--clz-line); border-radius: 3px;
    padding: 18px 22px 22px; box-shadow: var(--clz-shadow); min-width: 0; }
.clz-panel { margin-top: 18px; }
.clz-panel-h { display: flex; justify-content: space-between; align-items: baseline; gap: 10px;
    border-bottom: 2px solid var(--clz-brand); padding-bottom: 10px; margin-bottom: 14px; }
.clz-panel-h b { font-size: 16px; }
.clz-panel-h span { font-size: 11.5px; color: var(--clz-sub); }
.clz-article { font: 16px/2.2 Georgia, "Songti SC", "PingFang SC", serif; }
.clz-article p { margin: 0 0 14px; text-indent: 2em; }
.clz-article p:first-child { text-indent: 0; }
.clz-blank { font: 13px var(--clz-font); color: var(--clz-ink); border: 0; border-bottom: 2px solid var(--clz-brand);
    background: var(--clz-fill); padding: 2px 4px; margin: 0 3px; min-width: 92px; }
.clz-blank.is-right { border-bottom-color: var(--clz-green); color: var(--clz-green); }
.clz-blank.is-wrong { border-bottom-color: var(--clz-red); color: var(--clz-red); }
.clz-no { font: 700 11px Georgia, serif; color: var(--clz-red); vertical-align: super; }
.clz-btn-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; border-top: 1px dashed var(--clz-line); padding-top: 14px; }
.clz-empty { text-align: center; color: var(--clz-sub); font-size: 13px; padding: 28px; font-family: var(--clz-font); }
.clz-side { display: flex; flex-direction: column; gap: 12px; }
.clz-side-card { background: var(--clz-paper); border: 1px solid var(--clz-line); border-radius: 3px; padding: 14px 16px; box-shadow: var(--clz-shadow); }
.clz-side-card h3 { font-size: 14px; margin: 0 0 10px; padding-bottom: 7px; border-bottom: 1px dashed var(--clz-line); }
.clz-answer-sheet { display: grid; grid-template-columns: repeat(5, 1fr); gap: 5px; }
.clz-sheet-cell { aspect-ratio: 1; border: 1px solid var(--clz-line); border-radius: 2px; background: var(--clz-fill);
    font: 12px Georgia, serif; display: flex; align-items: center; justify-content: center; cursor: pointer; flex-direction: column; }
.clz-sheet-cell.is-done { background: var(--clz-brand); color: #fff; border-color: var(--clz-brand); }
.clz-sheet-cell.is-right { background: var(--clz-green); color: #fff; border-color: var(--clz-green); }
.clz-sheet-cell.is-wrong { background: var(--clz-red); color: #fff; border-color: var(--clz-red); }
.clz-side-tip { font-size: 11px; color: var(--clz-sub); margin: 8px 0 0; }
.clz-tips { padding-left: 20px; margin: 0; font-size: 12px; line-height: 1.95; color: var(--clz-sub); }
.clz-legend { display: grid; grid-template-columns: auto 1fr; gap: 4px 8px; font-size: 11.5px; color: var(--clz-sub); }
.clz-legend span { background: var(--clz-fill); border-radius: 2px; padding: 1px 6px; color: var(--clz-brand); text-align: center; }

/* 解析 */
.clz-review[hidden] { display: none !important; }
.clz-review-list { display: flex; flex-direction: column; gap: 8px; }
.clz-review-item { border: 1px solid var(--clz-line); border-left: 3px solid var(--clz-red); border-radius: 2px;
    padding: 10px 13px; background: var(--clz-fill); font-size: 12.5px; line-height: 1.85; }
.clz-review-item.is-right { border-left-color: var(--clz-green); }
.clz-review-item b { color: var(--clz-brand); }
.clz-review-item .clz-clue { font-size: 11px; background: var(--clz-paper); border-radius: 2px; padding: 1px 7px; margin-left: 6px; }
.clz-hint { font-size: 11.5px; color: var(--clz-sub); line-height: 1.8; margin: 10px 0 0; }
.clz-ai-out[hidden] { display: none !important; }
.clz-ai-out { margin-top: 14px; padding: 16px; background: var(--clz-fill); border-radius: 3px;
    font-size: 13px; line-height: 1.95; white-space: pre-wrap; word-break: break-word; }
.clz-ai-out.is-err { color: var(--clz-red); }

/* 弹窗 */
.clz-modal[hidden] { display: none !important; }
.clz-modal { position: fixed; inset: 0; z-index: 9999; display: flex; align-items: center; justify-content: center;
    background: rgba(18,26,40,.64); padding: 20px; }
.clz-modal-box { position: relative; width: min(440px, 100%); background: var(--clz-paper); color: var(--clz-ink);
    padding: 28px 30px; border-radius: 3px; border-top: 5px solid var(--clz-red); box-shadow: 0 22px 54px rgba(0,0,0,.32); }
.clz-modal-x { position: absolute; right: 12px; top: 6px; border: 0; background: none; font-size: 24px; color: var(--clz-sub); cursor: pointer; }
.clz-modal-box h2 { margin: 8px 0 10px; font-size: 22px; }
.clz-modal-box p { font-size: 14px; color: var(--clz-sub); line-height: 1.9; }
.ws-toast { position: fixed; left: 50%; bottom: 30px; transform: translate(-50%, 16px); z-index: 10000;
    background: var(--clz-ink); color: var(--clz-paper); padding: 10px 20px; border-radius: 3px;
    font-size: 13px; opacity: 0; pointer-events: none; transition: .25s; }
.ws-toast.is-on { opacity: 1; transform: translate(-50%, 0); }
.ws-toast.is-err { background: var(--clz-red); color: #fff; }

@media (max-width: 960px) { .clz-hero, .clz-layout { grid-template-columns: 1fr; } }
@media (max-width: 480px) {
    .clz-wrap { padding: 0 12px; } .clz-hero-copy, .clz-paper, .clz-panel { padding: 18px 14px; }
    .clz-article { font-size: 15px; } .clz-answer-sheet { grid-template-columns: repeat(5, 1fr); }
}
@media print {
    .clz-score, .clz-hero, .clz-side, .clz-review, .clz-btn-row, .tskb, .clz-modal { display: none !important; }
    .clz-article { color: #000; } .clz-paper { border: 0; box-shadow: none; }
}

/* dark hero contrast fix */
:root[data-theme="dark"] .clz-score { background: #1d3450; color: #e7edf7; }

/* dark button contrast fix */
:root[data-theme="dark"] .clz-btn--main { color: #0e1622; }
:root[data-theme="dark"] .clz-btn--ai { color: #0c1a12; }