/* ==========================================================================
   周期规律训练器 /tool/periodic-pattern-drill
   视觉主题：年轮时间轮 —— 柠檬黄 + 深墨绿 + 洋红
   ========================================================================== */

.ppd-page {
    --ppd-cream: #fdf8e7;
    --ppd-cream-2: #fffdf3;
    --ppd-cream-3: #f5eecf;
    --ppd-ink: #23301f;
    --ppd-ink-2: #4d5f47;
    --ppd-ink-3: #86947f;
    --ppd-line: #e2d9a8;
    --ppd-line-2: #eee6c8;
    --ppd-lemon: #e6c93f;
    --ppd-lemon-2: #cfae1f;
    --ppd-lemon-soft: #fbf3cd;
    --ppd-forest: #1f3b2c;
    --ppd-forest-2: #2c5440;
    --ppd-forest-soft: #e0eae3;
    --ppd-magenta: #d1477a;
    --ppd-magenta-soft: #fae3ec;
    --ppd-ok: #2c5440;
    --ppd-warn: #a9761c;
    --ppd-err: #b5433f;
    --ppd-shadow: 0 12px 30px rgba(35, 48, 31, .14);
    --ppd-shadow-sm: 0 4px 14px rgba(35, 48, 31, .1);
    --ppd-radius: 18px;
}

:root[data-theme="dark"] .ppd-page {
    --ppd-cream: #1c211b;
    --ppd-cream-2: #232922;
    --ppd-cream-3: #2b322a;
    --ppd-ink: #edf1e6;
    --ppd-ink-2: #b3bfae;
    --ppd-ink-3: #879380;
    --ppd-line: #39412f;
    --ppd-line-2: #313830;
    --ppd-lemon: #e8d24a;
    --ppd-lemon-2: #f0dc66;
    --ppd-lemon-soft: #33300f;
    --ppd-forest: #8fc4a6;
    --ppd-forest-2: #a8d6bb;
    --ppd-forest-soft: #1e3226;
    --ppd-magenta: #e0689c;
    --ppd-magenta-soft: #3a1f2b;
    --ppd-ok: #8fc4a6;
    --ppd-warn: #d5a552;
    --ppd-err: #e07a76;
    --ppd-shadow: 0 12px 30px rgba(0, 0, 0, .4);
    --ppd-shadow-sm: 0 4px 14px rgba(0, 0, 0, .32);
}

.ppd-page {
    color: var(--ppd-ink);
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.72;
    font-variant-numeric: tabular-nums;
    padding-bottom: 40px;
}

.ppd-page * { box-sizing: border-box; }

.ppd-page h1,
.ppd-page h2,
.ppd-page h3 {
    font-family: "Songti SC", "SimSun", "PingFang SC", serif;
    margin: 0;
    letter-spacing: .5px;
}

/* ===================== 首屏 ===================== */
.ppd-hero {
    background:
        radial-gradient(circle at 96% -10%, rgba(230, 201, 63, .22) 0 34%, transparent 34.5%),
        radial-gradient(circle at 96% -10%, rgba(31, 59, 44, .12) 0 52%, transparent 52.5%),
        radial-gradient(circle at 96% -10%, rgba(209, 71, 122, .1) 0 68%, transparent 68.5%),
        linear-gradient(180deg, var(--ppd-cream-2), var(--ppd-cream));
    border: 1px solid var(--ppd-line);
    border-radius: var(--ppd-radius);
    box-shadow: var(--ppd-shadow);
    padding: 28px 28px 22px;
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}

.ppd-hero::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 5px;
    background: linear-gradient(90deg, var(--ppd-forest), var(--ppd-lemon), var(--ppd-magenta));
}

.ppd-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 24px;
    align-items: start;
}

.ppd-kicker {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 3px;
    color: var(--ppd-forest);
    border: 1px solid var(--ppd-forest);
    border-radius: 999px;
    padding: 2px 12px;
    background: var(--ppd-forest-soft);
    margin-bottom: 10px;
}

.ppd-hero-copy h1 { font-size: 30px; color: var(--ppd-forest); margin-bottom: 8px; }
.ppd-lead { margin: 0 0 12px; color: var(--ppd-ink-2); font-size: 14.5px; max-width: 62ch; }
.ppd-lead b { color: var(--ppd-magenta); }

.ppd-tags { list-style: none; margin: 0 0 16px; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }

.ppd-tags li {
    font-size: 12px;
    color: var(--ppd-forest);
    background: var(--ppd-lemon-soft);
    border-radius: 999px;
    padding: 2px 11px;
}

/* ===================== 操作入口 ===================== */
.ppd-entry {
    background: var(--ppd-cream-2);
    border: 1px solid var(--ppd-line);
    border-radius: 14px;
    padding: 18px 18px 16px;
    box-shadow: var(--ppd-shadow-sm);
}

.ppd-entry-head {
    display: flex;
    align-items: baseline;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 13px;
    padding-bottom: 10px;
    border-bottom: 1px dashed var(--ppd-line);
}

.ppd-entry-head b { font-size: 15px; color: var(--ppd-magenta); }
.ppd-entry-head span { font-size: 12.5px; color: var(--ppd-ink-3); }

.ppd-input,
.ppd-select {
    width: 100%;
    padding: 9px 13px;
    border: 1px solid var(--ppd-line);
    border-radius: 10px;
    background: var(--ppd-cream);
    color: var(--ppd-ink);
    font-size: 15px;
    font-family: inherit;
    font-variant-numeric: tabular-nums;
    transition: border-color .16s ease, box-shadow .16s ease;
}

.ppd-input:focus,
.ppd-select:focus {
    outline: none;
    border-color: var(--ppd-lemon-2);
    box-shadow: 0 0 0 3px rgba(230, 201, 63, .28);
}

.ppd-input.is-bad { border-color: var(--ppd-err); background: rgba(181, 67, 63, .06); }

.ppd-field { display: flex; flex-direction: column; gap: 3px; }
.ppd-label { font-size: 12.5px; color: var(--ppd-ink-2); display: flex; align-items: baseline; gap: 4px; }
.ppd-label .ppd-unit { font-size: 11px; color: var(--ppd-ink-3); }

.ppd-raw {
    font-size: 18px;
    letter-spacing: 1px;
    font-family: "DIN Alternate", Consolas, monospace;
}

.ppd-force-row { margin-top: 12px; }

.ppd-err-tip { font-size: 11.5px; color: var(--ppd-err); min-height: 15px; line-height: 1.35; }
.ppd-err-tip.is-warn { color: var(--ppd-warn); }

.ppd-why {
    margin-top: 14px;
    background: var(--ppd-lemon-soft);
    border: 1px solid var(--ppd-line);
    border-radius: 12px;
    padding: 12px 14px;
}

.ppd-why h3 { font-size: 13.5px; color: var(--ppd-forest); margin-bottom: 6px; }
.ppd-why ul { margin: 0; padding-left: 18px; font-size: 12.5px; color: var(--ppd-ink-2); }
.ppd-why li { margin-bottom: 2px; }

/* ===================== 右侧年轮 ===================== */
.ppd-side { display: flex; flex-direction: column; gap: 12px; }

.ppd-wheel {
    background: var(--ppd-forest);
    border: 1px solid var(--ppd-forest);
    border-radius: var(--ppd-radius);
    overflow: hidden;
    box-shadow: var(--ppd-shadow-sm);
}

.ppd-wheel-head {
    background: var(--ppd-lemon);
    color: #22301c;
    font-size: 12.5px;
    letter-spacing: 3px;
    text-align: center;
    padding: 7px;
    font-weight: 700;
}

.ppd-wheel-body {
    padding: 16px;
    text-align: center;
    background:
        radial-gradient(circle at 50% 40%, rgba(230, 201, 63, .16) 0 46%, transparent 46.5%),
        radial-gradient(circle at 50% 40%, rgba(209, 71, 122, .12) 0 62%, transparent 62.5%);
}

.ppd-wheel-label { font-size: 12.5px; color: rgba(255, 255, 255, .66); }

.ppd-wheel-value {
    font-size: 38px;
    color: var(--ppd-lemon);
    font-family: "DIN Alternate", "Arial Narrow", Arial, sans-serif;
    line-height: 1.2;
    letter-spacing: 1px;
}

.ppd-wheel-pattern {
    display: inline-block;
    margin-top: 4px;
    font-size: 13px;
    color: var(--ppd-forest);
    background: var(--ppd-lemon);
    border-radius: 999px;
    padding: 2px 14px;
}

.ppd-wheel-formula {
    margin-top: 10px;
    font-size: 12.5px;
    color: rgba(255, 255, 255, .82);
    font-family: Consolas, "Courier New", monospace;
    line-height: 1.7;
    word-break: break-all;
}

.ppd-wheel-explain {
    margin-top: 10px;
    text-align: left;
    font-size: 12.5px;
    color: rgba(255, 255, 255, .88);
    line-height: 1.8;
    background: rgba(255, 255, 255, .08);
    border-radius: 10px;
    padding: 9px 12px;
}

:root[data-theme="dark"] .ppd-page .ppd-wheel { background: var(--ppd-forest-soft); border-color: var(--ppd-line); }
:root[data-theme="dark"] .ppd-page .ppd-wheel-value { color: var(--ppd-lemon); }
:root[data-theme="dark"] .ppd-page .ppd-wheel-label { color: var(--ppd-ink-3); }
:root[data-theme="dark"] .ppd-page .ppd-wheel-explain { background: rgba(0, 0, 0, .22); color: var(--ppd-ink-2); }
:root[data-theme="dark"] .ppd-page .ppd-wheel-formula { color: var(--ppd-ink-2); }

/* ===================== 预置 ===================== */
.ppd-presets {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px dashed var(--ppd-line);
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.ppd-presets-label { font-size: 12.5px; color: var(--ppd-ink-3); margin-right: 2px; }

.ppd-presets button {
    font-family: inherit;
    font-size: 12.5px;
    color: var(--ppd-forest);
    background: var(--ppd-cream);
    border: 1px solid var(--ppd-line);
    border-radius: 999px;
    padding: 4px 13px;
    cursor: pointer;
    transition: all .16s ease;
}

.ppd-presets button:hover { border-color: var(--ppd-magenta); color: var(--ppd-magenta); background: var(--ppd-magenta-soft); }

/* ===================== 错误条 ===================== */
.ppd-errbar {
    background: rgba(181, 67, 63, .08);
    border: 1px solid var(--ppd-err);
    border-left-width: 4px;
    border-radius: 12px;
    padding: 12px 16px;
    margin-bottom: 18px;
    font-size: 13px;
    color: var(--ppd-err);
}

.ppd-errbar b { display: block; margin-bottom: 4px; }
.ppd-errbar ul { margin: 0; padding-left: 18px; }
.ppd-errbar li { margin-bottom: 2px; }
.ppd-errbar .ppd-warn-title { color: var(--ppd-warn); margin-top: 6px; }

.ppd-errbar.is-warn {
    background: rgba(169, 118, 28, .07);
    border-color: var(--ppd-warn);
    color: var(--ppd-warn);
}

.ppd-errbar.is-warn .ppd-warn-title { color: var(--ppd-warn); margin-top: 0; }

/* ===================== 结果面板 ===================== */
.ppd-result { display: flex; flex-direction: column; gap: 18px; }

.ppd-panel {
    background: var(--ppd-cream-2);
    border: 1px solid var(--ppd-line);
    border-radius: var(--ppd-radius);
    padding: 20px 22px;
    box-shadow: var(--ppd-shadow-sm);
    position: relative;
}

.ppd-panel::before {
    content: "";
    position: absolute;
    left: 0;
    top: 18px;
    bottom: 18px;
    width: 3px;
    border-radius: 0 3px 3px 0;
    background: linear-gradient(180deg, var(--ppd-forest), var(--ppd-lemon), var(--ppd-magenta));
}

.ppd-panel-head { margin-bottom: 14px; }

.ppd-panel-kicker {
    display: inline-block;
    font-size: 11.5px;
    letter-spacing: 2px;
    color: var(--ppd-magenta);
    border: 1px solid var(--ppd-magenta);
    border-radius: 999px;
    padding: 1px 10px;
    margin-bottom: 6px;
}

.ppd-panel-head h2 { font-size: 20px; color: var(--ppd-forest); }
.ppd-panel-head p { margin: 4px 0 0; font-size: 13px; color: var(--ppd-ink-2); }

/* ===================== 数列展示（年轮） ===================== */
.ppd-terms {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.ppd-term {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--ppd-cream);
    border: 1px solid var(--ppd-line);
    border-radius: 999px;
    padding: 4px 14px 4px 5px;
    font-size: 15px;
    font-family: "DIN Alternate", Consolas, monospace;
    color: var(--ppd-ink);
}

.ppd-term i {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--ppd-forest);
    color: #fff;
    font-size: 11px;
    font-style: normal;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.ppd-term.is-next {
    border-color: var(--ppd-magenta);
    border-style: dashed;
    color: var(--ppd-magenta);
    font-weight: 700;
}

.ppd-term.is-next i { background: var(--ppd-magenta); }

/* ===================== 候选表 ===================== */
.ppd-table-wrap { overflow-x: auto; }

.ppd-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13.5px;
    min-width: 640px;
}

.ppd-table th,
.ppd-table td { border: 1px solid var(--ppd-line-2); padding: 9px 11px; text-align: left; vertical-align: top; }

.ppd-table th { background: var(--ppd-lemon-soft); color: var(--ppd-forest); font-size: 12.5px; font-weight: 600; }

.ppd-table tr.is-main td { background: var(--ppd-forest-soft); font-weight: 600; }

.ppd-num { text-align: right !important; color: var(--ppd-magenta); font-weight: 700; }

.ppd-empty { text-align: center !important; color: var(--ppd-ink-3); padding: 18px 8px !important; }

.ppd-ops button {
    font-family: inherit;
    font-size: 12px;
    color: var(--ppd-forest);
    background: var(--ppd-cream);
    border: 1px solid var(--ppd-line);
    border-radius: 999px;
    padding: 2px 10px;
    margin-right: 5px;
    cursor: pointer;
}

.ppd-ops button:hover { border-color: var(--ppd-magenta); color: var(--ppd-magenta); }

/* ===================== 训练器 ===================== */
.ppd-quiz-card {
    background: var(--ppd-lemon-soft);
    border: 1px dashed var(--ppd-lemon-2);
    border-radius: 14px;
    padding: 16px 18px;
}

.ppd-quiz-bar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.ppd-quiz-bar .ppd-select { width: auto; min-width: 120px; }

.ppd-quiz-text {
    font-size: 16px;
    color: var(--ppd-ink);
    background: var(--ppd-cream-2);
    border: 1px solid var(--ppd-line);
    border-radius: 12px;
    padding: 13px 16px;
    white-space: pre-line;
    margin-bottom: 12px;
    font-family: "DIN Alternate", Consolas, monospace;
}

.ppd-quiz-answer-row { display: flex; align-items: flex-end; gap: 10px; flex-wrap: wrap; }
.ppd-quiz-answer-row .ppd-input { max-width: 220px; }

.ppd-quiz-feedback {
    margin-top: 12px;
    border: 1px solid var(--ppd-line);
    border-radius: 12px;
    padding: 10px 14px;
    font-size: 13.5px;
    background: var(--ppd-cream-2);
    color: var(--ppd-ink-2);
}

.ppd-quiz-feedback.is-ok { border-color: var(--ppd-forest); background: var(--ppd-forest-soft); color: var(--ppd-ok); }
.ppd-quiz-feedback.is-bad { border-color: var(--ppd-err); background: rgba(181, 67, 63, .08); color: var(--ppd-err); }

.ppd-quiz-answer { margin-top: 12px; }
.ppd-quiz-tip { font-size: 13px; color: var(--ppd-ink-2); margin: 0; line-height: 1.8; }
.ppd-quiz-tip b { color: var(--ppd-magenta); font-size: 15px; }

/* ===================== 按钮 ===================== */
.ppd-btn {
    font-family: inherit;
    font-size: 13.5px;
    padding: 8px 18px;
    border-radius: 999px;
    border: 1px solid var(--ppd-forest);
    background: var(--ppd-forest);
    color: #fff;
    cursor: pointer;
    transition: all .16s ease;
}

.ppd-btn:hover { background: var(--ppd-lemon); border-color: var(--ppd-lemon); color: #22301c; }

.ppd-btn--magenta { background: var(--ppd-magenta); border-color: var(--ppd-magenta); }
.ppd-btn--magenta:hover { background: #b93a68; border-color: #b93a68; color: #fff; }

.ppd-btn--ghost { background: transparent; color: var(--ppd-forest); border-color: var(--ppd-line); }
.ppd-btn--ghost:hover { background: var(--ppd-lemon-soft); color: var(--ppd-forest); border-color: var(--ppd-lemon-2); }

.ppd-actions { display: flex; gap: 9px; flex-wrap: wrap; margin-top: 14px; }
.ppd-batch-bar { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.ppd-batch-best { margin: 0; font-size: 13px; color: var(--ppd-ink-2); }
.ppd-batch-best b { color: var(--ppd-magenta); }

/* ===================== CSV / FAQ / 留言 ===================== */
.ppd-pre {
    background: var(--ppd-cream);
    border: 1px solid var(--ppd-line);
    border-radius: 12px;
    padding: 14px 16px;
    font-size: 12px;
    line-height: 1.85;
    color: var(--ppd-ink-2);
    overflow-x: auto;
    white-space: pre;
    margin: 0;
    font-family: Consolas, "Courier New", monospace;
}

.ppd-faq-item {
    border: 1px solid var(--ppd-line-2);
    border-radius: 12px;
    margin-bottom: 8px;
    background: var(--ppd-cream);
    overflow: hidden;
}

.ppd-faq-item summary {
    cursor: pointer;
    padding: 11px 16px;
    font-size: 14px;
    color: var(--ppd-forest);
    font-weight: 600;
    list-style: none;
}

.ppd-faq-item summary::-webkit-details-marker { display: none; }
.ppd-faq-item summary::before { content: "❋ "; color: var(--ppd-magenta); }
.ppd-faq-item[open] summary::before { content: "✿ "; }

.ppd-faq-a {
    padding: 10px 16px 13px 34px;
    font-size: 13.5px;
    color: var(--ppd-ink-2);
    border-top: 1px dashed var(--ppd-line-2);
}

.ppd-faq-a b { color: var(--ppd-magenta); }

.ppd-comments { margin-top: 4px; }

/* ===================== Toast ===================== */
.ppd-toast {
    position: fixed;
    left: 50%;
    bottom: 28px;
    transform: translateY(8px);
    opacity: 0;
    pointer-events: none;
    z-index: 9999;
    background: var(--ppd-forest);
    color: #fff;
    font-size: 13.5px;
    padding: 9px 20px;
    border-radius: 999px;
    box-shadow: var(--ppd-shadow);
    transition: opacity .22s ease, transform .22s ease;
}

.ppd-toast.is-error { background: var(--ppd-err); }

:root[data-theme="dark"] .ppd-page .ppd-toast { background: #35503f; }

/* ===================== A4 规律单 ===================== */
.ppd-sheet { display: none; }

@media print {
    body * { visibility: hidden !important; }
    .ppd-sheet, .ppd-sheet * { visibility: visible !important; }
    .ppd-sheet {
        display: block !important;
        position: absolute;
        inset: 0;
        padding: 16mm 14mm;
        background: #fff;
        color: #111;
    }
}

.ppd-sheet-title {
    font-family: "Songti SC", "SimSun", serif;
    font-size: 22px;
    text-align: center;
    letter-spacing: 4px;
    color: #111;
    padding-bottom: 8px;
    border-bottom: 2px solid #111;
}

.ppd-sheet-sub { text-align: center; font-size: 12px; color: #555; padding: 6px 0 12px; }

.ppd-sheet-seq {
    text-align: center;
    font-size: 17px;
    color: #111;
    margin-bottom: 12px;
    font-family: "DIN Alternate", Consolas, monospace;
}

.ppd-sheet-table { width: 100%; border-collapse: collapse; font-size: 13px; }

.ppd-sheet-table th,
.ppd-sheet-table td { border: 1px solid #444; padding: 7px 9px; text-align: left; vertical-align: top; }

.ppd-sheet-table th { background: #eee; }

.ppd-sheet-sign {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: 30px;
    font-size: 13px;
    color: #333;
}

/* ===================== 响应式 ===================== */
@media (max-width: 1000px) {
    .ppd-hero-grid { grid-template-columns: 1fr; }
    .ppd-side { flex-direction: row; flex-wrap: wrap; }
    .ppd-wheel { flex: 1 1 300px; }
}

@media (max-width: 720px) {
    .ppd-hero { padding: 20px 15px 16px; }
    .ppd-hero-copy h1 { font-size: 24px; }
    .ppd-panel { padding: 16px 14px; }
    .ppd-side { flex-direction: column; }
    .ppd-wheel-value { font-size: 30px; }
    .ppd-raw { font-size: 16px; }
}