/* ======================================================================
 *  任意课文背诵遮盖卡 /tool/recite-checker
 *  依赖 calc-common.css 变量与公共类，支持黑夜模式与打印。
 * ====================================================================== */

.rc-textarea {
    width: 100%;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid var(--c-border);
    background: var(--c-surface-soft);
    color: var(--c-text);
    font-family: inherit;
    font-size: 14px;
    line-height: 1.9;
    resize: vertical;
    outline: none;
    transition: border-color 0.16s ease, box-shadow 0.16s ease;
}
.rc-textarea:focus { border-color: var(--c-primary); box-shadow: 0 0 0 3px var(--c-primary-soft); }

/* ---------- 工具栏 ---------- */
.rc-toolbar { display: flex; gap: 10px; align-items: center; justify-content: space-between; flex-wrap: wrap; margin-bottom: 12px; }
.rc-seg { display: inline-grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 6px; }
.rc-seg button {
    height: 38px;
    padding: 0 14px;
    border-radius: 11px;
    border: 1px solid var(--c-border);
    background: var(--c-surface-soft);
    color: var(--c-text-sub);
    font-family: inherit;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.15s ease;
}
.rc-seg button:hover { border-color: #0a7fc0; color: #0a7fc0; }
.rc-seg button.is-active {
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.14), rgba(0, 150, 220, 0.07));
    border-color: rgba(0, 102, 255, 0.5);
    color: #0a7fc0;
}
.rc-fonts { display: inline-flex; gap: 6px; }
.rc-fonts button {
    width: 40px; height: 38px;
    border-radius: 11px;
    border: 1px solid var(--c-border);
    background: var(--c-surface-soft);
    color: var(--c-text-sub);
    font-family: inherit;
    font-size: 14px;
    font-weight: 800;
    cursor: pointer;
}
.rc-fonts button:hover { border-color: #0a7fc0; color: #0a7fc0; }

/* ---------- 进度 ---------- */
.rc-progress { margin-bottom: 14px; }
.rc-progress-track { height: 10px; border-radius: 99px; background: var(--c-surface-soft); border: 1px solid var(--c-border); overflow: hidden; margin-bottom: 8px; }
.rc-progress-track i {
    display: block; height: 100%; width: 0;
    border-radius: 99px;
    background: linear-gradient(90deg, #34c759, #30b0c7);
    transition: width 0.35s ease;
}
.rc-progress-txt { display: flex; gap: 8px; flex-wrap: wrap; }
.rc-pill {
    font-size: 12px;
    padding: 3px 11px;
    border-radius: 99px;
    background: var(--c-surface-soft);
    border: 1px solid var(--c-border);
    color: var(--c-text-muted);
}
.rc-pill b { color: var(--c-text); }
.rc-pill--ok { background: rgba(52, 199, 89, 0.1); border-color: rgba(52, 199, 89, 0.35); color: #1f9d43; }
.rc-pill--ok b { color: #1f9d43; }
.rc-pill--warn { background: rgba(255, 176, 32, 0.1); border-color: rgba(255, 176, 32, 0.35); color: #b97600; }
.rc-pill--warn b { color: #b97600; }
.rc-pill--bad { background: rgba(255, 59, 48, 0.08); border-color: rgba(255, 59, 48, 0.32); color: #e0342b; }
.rc-pill--bad b { color: #e0342b; }

/* ---------- 句子卡 ---------- */
.rc-sentences { display: grid; gap: 10px; max-height: 560px; overflow-y: auto; padding-right: 4px; }
.rc-sentence {
    border: 1px solid var(--c-border);
    border-radius: 14px;
    padding: 14px 15px 10px;
    background: var(--c-surface-soft);
    border-left-width: 4px;
    border-left-color: var(--c-border);
    transition: border-color 0.2s ease, background 0.2s ease;
}
.rc-sentence-txt { line-height: 2.1; font-weight: 600; color: var(--c-text); word-break: break-all; }
.rc-char { display: inline-block; min-width: 0.62em; text-align: center; }
.rc-punct { color: var(--c-text-muted); font-weight: 700; }
.rc-hidden {
    color: transparent;
    background: var(--c-text);
    border-radius: 5px;
    cursor: pointer;
    user-select: none;
    margin: 0 1px;
    transition: transform 0.1s ease, background 0.15s ease;
}
.rc-hidden:hover { transform: scale(1.12); background: #0a7fc0; }
.rc-rate { display: flex; gap: 6px; margin-top: 9px; flex-wrap: wrap; }
.rc-rate button {
    padding: 4px 11px;
    border-radius: 99px;
    border: 1px solid var(--c-border);
    background: var(--c-bg-card);
    color: var(--c-text-muted);
    font-family: inherit;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s ease;
}
.rc-rate button:hover { border-color: #0a7fc0; color: #0a7fc0; }
.rc-rate button.is-on { color: #fff; }
.rc-rate button[data-mark="ok"].is-on { background: #34c759; border-color: #34c759; }
.rc-rate button[data-mark="stuck"].is-on { background: #ffb020; border-color: #ffb020; }
.rc-rate button[data-mark="no"].is-on { background: #ff3b30; border-color: #ff3b30; }

.rc-mark--ok { border-left-color: #34c759; }
.rc-mark--stuck { border-left-color: #ffb020; }
.rc-mark--no { border-left-color: #ff3b30; }

.rc-card-btns { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.rc-card-btns .btn { padding: 0 14px; height: 38px; font-size: 13px; }

/* ---------- 右侧 ---------- */
.rc-detail-tag {
    display: inline-block;
    padding: 3px 14px;
    border-radius: 99px;
    background: rgba(0, 102, 255, 0.12);
    color: #0a7fc0;
    font-size: 12px;
    font-weight: 800;
    margin-bottom: 12px;
}
.rc-howto { margin-top: 18px; padding-top: 14px; border-top: 1px dashed var(--c-border); }
.rc-howto h3 { font-size: 14px; font-weight: 800; margin-bottom: 8px; }
.rc-howto ol { padding-left: 20px; }
.rc-howto li { font-size: 13px; line-height: 1.95; color: var(--c-text-sub); }
.rc-howto li b { color: var(--c-text); }
.rc-ai-tips { display: grid; gap: 10px; }
.rc-ai-tip {
    display: flex;
    gap: 10px;
    padding: 12px 13px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.08), rgba(0, 168, 168, 0.05));
    border: 1px solid rgba(0, 102, 255, 0.25);
}
.rc-ai-num {
    flex: none;
    width: 24px; height: 24px;
    border-radius: 8px;
    display: grid;
    place-items: center;
    background: #0a7fc0;
    color: #fff;
    font-size: 12.5px;
    font-weight: 800;
}
.rc-ai-tip p { font-size: 13px; line-height: 1.75; color: var(--c-text); }

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
    .rc-toolbar { flex-direction: column; align-items: stretch; }
    .rc-seg { grid-auto-flow: row; grid-template-columns: repeat(3, 1fr); display: grid; }
    .rc-seg button { padding: 0 6px; font-size: 12px; }
    .rc-fonts { justify-content: flex-end; }
}

/* ---------- 黑夜模式 ---------- */
[data-theme="dark"] .rc-textarea { background: rgba(255, 255, 255, 0.04); }
[data-theme="dark"] .rc-seg button,
[data-theme="dark"] .rc-fonts button { background: rgba(255, 255, 255, 0.04); }
[data-theme="dark"] .rc-seg button.is-active { background: rgba(0, 150, 220, 0.18); border-color: rgba(0, 150, 220, 0.55); color: #58bdf0; }
[data-theme="dark"] .rc-hidden { background: #c9d4e8; }
[data-theme="dark"] .rc-hidden:hover { background: #58bdf0; }
[data-theme="dark"] .rc-rate button { background: rgba(255, 255, 255, 0.05); }
[data-theme="dark"] .rc-detail-tag { background: rgba(0, 150, 220, 0.18); color: #58bdf0; }
[data-theme="dark"] .rc-pill--ok b { color: #4ede78; }
[data-theme="dark"] .rc-pill--warn b { color: #ffb84d; }
[data-theme="dark"] .rc-pill--bad b { color: #ff9a94; }
[data-theme="dark"] .rc-ai-tip { background: rgba(0, 150, 220, 0.1); border-color: rgba(0, 150, 220, 0.3); }