/* ===== 乘法口诀闯关测试 ===== */
#ttApp .tt-hero { text-align: center; padding: 12px 10px 0; }
#ttApp .tt-hero h1 { font-size: 30px; font-weight: 800; color: var(--c-text); margin-bottom: 10px; }
#ttApp .tt-hero p { font-size: 15px; color: var(--c-text-sub); line-height: 1.7; }

#ttApp .tt-levels { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin: 18px 0; }
#ttApp .tt-lv {
    min-width: 62px; border: 2px solid var(--c-border); background: var(--c-surface);
    color: var(--c-text); border-radius: 14px; padding: 9px 10px;
    font-size: 15px; font-weight: 800; cursor: pointer; transition: .15s; text-align: center;
}
#ttApp .tt-lv small { display: block; font-size: 11px; font-weight: 600; color: var(--c-text-muted); margin-top: 2px; }
#ttApp .tt-lv.is-on { border-color: var(--c-primary); background: var(--c-primary-soft); color: var(--c-primary); }
#ttApp .tt-lv.is-on small { color: var(--c-primary); }

#ttApp .tt-panel {
    max-width: 640px; margin: 0 auto; background: var(--c-surface);
    border: 1px solid var(--c-border); border-radius: var(--radius-md);
    padding: 20px; box-shadow: var(--shadow-md); text-align: center;
}
#ttApp .tt-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 12px; font-size: 14px; font-weight: 700; color: var(--c-text-sub); }
#ttApp .tt-top b { color: var(--c-primary); font-size: 18px; }
#ttApp .tt-bar { height: 10px; border-radius: 999px; background: var(--c-surface-2); overflow: hidden; margin-bottom: 16px; }
#ttApp .tt-bar-in { height: 100%; width: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--c-accent-green), var(--c-accent-cyan)); transition: width .1s linear; }
#ttApp .tt-bar-in.warn { background: linear-gradient(90deg, #ffa94d, #ff6b6b); }

#ttApp .tt-q { font-size: 34px; font-weight: 800; color: var(--c-text); margin: 10px 0 14px; letter-spacing: 1px; }
#ttApp .tt-ans {
    width: 150px; height: 58px; font-size: 30px; font-weight: 800; text-align: center;
    border: 2px solid var(--c-primary); border-radius: 14px; background: var(--c-surface-soft);
    color: var(--c-primary); outline: none;
}

#ttApp .tt-pad { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; max-width: 300px; margin: 16px auto 0; }
#ttApp .tt-key {
    border: 1px solid var(--c-border); background: var(--c-surface-soft); color: var(--c-text);
    border-radius: 12px; padding: 13px 0; font-size: 22px; font-weight: 800; cursor: pointer; transition: .15s;
}
#ttApp .tt-key:hover { border-color: var(--c-primary); color: var(--c-primary); }
#ttApp .tt-key.act { background: linear-gradient(135deg, var(--c-primary), var(--c-accent-cyan)); color: #fff; border-color: transparent; }

#ttApp .tt-opts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-top: 16px; }
#ttApp .tt-opt {
    border: 2px solid var(--c-border); background: var(--c-surface-soft); color: var(--c-text);
    border-radius: 14px; padding: 14px 10px; font-size: 20px; font-weight: 800; cursor: pointer; transition: .15s;
}
#ttApp .tt-opt:hover { border-color: var(--c-primary); color: var(--c-primary); }
#ttApp .tt-opt.ok { border-color: var(--c-accent-green); background: var(--c-primary-soft); color: var(--c-primary); }
#ttApp .tt-opt.bad { border-color: #e03131; color: #e03131; }

#ttApp .tt-msg { font-size: 17px; font-weight: 800; min-height: 26px; margin-top: 14px; color: var(--c-text); }
#ttApp .tt-msg.ok { color: var(--c-primary); }
#ttApp .tt-msg.bad { color: #e03131; }

#ttApp .tt-ctrl { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 16px; }
#ttApp .tt-btn {
    border: none; border-radius: 999px; padding: 12px 20px; font-size: 15px; font-weight: 700;
    color: #fff; cursor: pointer; background: linear-gradient(135deg, var(--c-primary), var(--c-accent-cyan));
    box-shadow: var(--shadow-md);
}
#ttApp .tt-btn.gray { background: var(--c-surface-2); color: var(--c-text); box-shadow: none; border: 1px solid var(--c-border); }
#ttApp .tt-btn:disabled { opacity: .5; cursor: default; }

#ttApp .tt-result {
    max-width: 640px; margin: 18px auto 0; background: var(--c-surface);
    border: 1px solid var(--c-border); border-radius: var(--radius-md);
    padding: 18px 20px; box-shadow: var(--shadow-md); display: none;
}
#ttApp .tt-result h3 { font-size: 18px; font-weight: 800; color: var(--c-text); margin-bottom: 10px; text-align: center; }
#ttApp .tt-stars { font-size: 30px; text-align: center; margin-bottom: 10px; }
#ttApp .tt-wrong { font-size: 14px; line-height: 1.9; color: var(--c-text-sub); }
#ttApp .tt-wrong b { color: #e03131; }

#ttApp .tt-table { max-width: 720px; margin: 26px auto 0; }
#ttApp .tt-table h3 { font-size: 17px; font-weight: 800; color: var(--c-text); margin-bottom: 10px; }
#ttApp .tt-row { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; align-items: center; }
#ttApp .tt-row .tt-rl { width: 34px; font-weight: 800; color: var(--c-primary); font-size: 15px; }
#ttApp .tt-cell {
    font-size: 13px; font-weight: 700; color: var(--c-text-sub);
    background: var(--c-surface-soft); border: 1px solid var(--c-border);
    border-radius: 8px; padding: 5px 8px; white-space: nowrap;
}

#ttApp .tt-ai, #ttApp .tt-info { max-width: 720px; margin: 30px auto 0; }
#ttApp .tt-ai h2, #ttApp .tt-info h2 { font-size: 20px; font-weight: 800; color: var(--c-text); margin-bottom: 10px; }
#ttApp .tt-ai p { font-size: 14px; color: var(--c-text-sub); line-height: 1.8; margin-bottom: 14px; }
#ttApp .tt-ai-row { display: flex; gap: 10px; flex-wrap: wrap; }
#ttApp .tt-out {
    margin-top: 14px; background: var(--c-surface-soft); border: 1px solid var(--c-border);
    border-radius: var(--radius-sm); padding: 16px 18px;
    font-size: 15px; line-height: 1.85; color: var(--c-text); white-space: pre-wrap;
}
#ttApp .tt-info ul { list-style: disc; padding-left: 22px; margin-bottom: 24px; }
#ttApp .tt-info li { font-size: 14px; line-height: 1.9; color: var(--c-text-sub); margin-bottom: 8px; }
#ttApp .tt-info li b { color: var(--c-text); }

@media (max-width: 560px) {
    #ttApp .tt-hero h1 { font-size: 24px; }
    #ttApp .tt-q { font-size: 28px; }
    #ttApp .tt-opts { grid-template-columns: 1fr; }
}