/**
 * 練習ツール 新デザイン（集中画面）
 * 百人一首.jp — 2026-11 リデザイン第1弾（決まり字クイズ）
 *
 * 方針:
 * - 練習中（.pf-focus）はサイトのヘッダー・PR・広告の上に全画面で重ね、スクロールなしで1問ずつ解く
 * - 触る操作（回答・次へ・開始）は画面下半分に置く
 * - 色: 藍=主操作 / 緑青=正解 / 朱=不正解。画面の文字は BIZ UDPゴシック、歌は明朝
 * 接頭辞: pf-
 */

.pf {
    --pf-paper: #F7F8FA;
    --pf-surface: #FFFFFF;
    --pf-ink: #1A1D24;
    --pf-ink-2: #4A5160;
    --pf-ink-3: #5E6676;      /* 白地で 5.6:1 */
    --pf-line: #DCE0E7;
    --pf-line-2: #EBEEF3;
    --pf-ai: #22427A;         /* 藍 */
    --pf-ai-ink: #FFFFFF;
    --pf-ai-soft: #E6ECF6;
    --pf-shu: #C23B22;        /* 朱 */
    --pf-shu-soft: #FBE9E5;
    --pf-rokusho: #1F7A5C;    /* 緑青 */
    --pf-rokusho-soft: #E2F2EB;
    --pf-ui: 'BIZ UDPGothic', 'Hiragino Sans', 'Noto Sans JP', sans-serif;
    --pf-uta: var(--font-mincho, 'Shippori Mincho', 'Hiragino Mincho ProN', serif);
    --pf-anchor-bottom: 0px;  /* AdSense のアンカー広告の高さ（JSで設定） */
    --pf-anchor-top: 0px;
    font-family: var(--pf-ui);
    color: var(--pf-ink);
}

.pf [hidden] { display: none !important; }
.pf button { font-family: inherit; cursor: pointer; }
.pf :focus-visible { outline: 3px solid var(--pf-ai); outline-offset: 2px; }
.pf-svg {
    width: 20px; height: 20px; flex: none;
    stroke: currentColor; fill: none; stroke-width: 1.8;
    stroke-linecap: round; stroke-linejoin: round;
}

/* ============================
   設定画面
   ============================ */
.pf-setup,
.pf-result {
    max-width: 560px;
    margin: 0 auto;
}
.pf-title {
    font-family: var(--pf-uta);
    font-weight: 600;
    font-size: 1.75rem;
    line-height: 1.3;
    margin: 0 0 4px;
    color: var(--pf-ink);
}
.pf-lead {
    margin: 0 0 16px;
    color: var(--pf-ink-2);
    font-size: 0.9375rem;
}
.pf-last {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0 0 18px;
    padding: 10px 14px;
    border-radius: 14px;
    background: var(--pf-ai-soft);
    color: var(--pf-ai);
    font-size: 0.8125rem;
}
.pf-field { margin-bottom: 18px; }
.pf-label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--pf-ink-2);
    margin-bottom: 8px;
}
.pf-chips,
.pf .settings-options {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.pf-chip,
.pf .settings-option {
    min-height: 44px;
    min-width: 64px;
    padding: 0 16px;
    border-radius: 12px;
    border: 1.5px solid var(--pf-line);
    background: var(--pf-surface);
    color: var(--pf-ink);
    font-size: 0.9375rem;
    font-weight: 400;
    font-variant-numeric: tabular-nums;
    transition: border-color .15s, background-color .15s;
}
.pf-chip:hover,
.pf .settings-option:hover { border-color: var(--pf-ai); background: var(--pf-surface); }
.pf-chip[aria-pressed="true"],
.pf .settings-option.is-selected,
.pf .range-choices .settings-option.is-selected {
    border-color: var(--pf-ai);
    background: var(--pf-ai-soft);
    color: var(--pf-ai);
    font-weight: 700;
}
.pf .range-tabs { margin-bottom: 10px; }
.pf .range-count { font-size: 0.8125rem; color: var(--pf-ink-3); margin-top: 8px; }
.pf .range-count.is-empty { color: var(--pf-shu); }

.pf-switch {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 12px 0;
    border-top: 1px solid var(--pf-line-2);
}
.pf-switch b { display: block; font-size: 0.875rem; }
.pf-switch small { display: block; font-size: 0.75rem; color: var(--pf-ink-3); line-height: 1.5; }
.pf-toggle {
    position: relative;
    flex: none;
    width: 52px;
    height: 32px;
    border-radius: 16px;
    border: 0;
    background: #C9CED8;
    transition: background-color .2s;
}
.pf-toggle::after {
    content: "";
    position: absolute;
    top: 3px; left: 3px;
    width: 26px; height: 26px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, .25);
    transition: transform .2s;
}
.pf-toggle[aria-checked="true"] { background: var(--pf-rokusho); }
.pf-toggle[aria-checked="true"]::after { transform: translateX(20px); }

/* 開始ボタンなどを画面下に固定（設定・結果） */
.pf-dock {
    position: sticky;
    bottom: var(--pf-anchor-bottom);
    z-index: 5;
    display: grid;
    gap: 8px;
    margin: 18px 0 0;
    padding: 12px 0 calc(14px + env(safe-area-inset-bottom, 0px));
    background: var(--pf-paper);
    border-top: 1px solid var(--pf-line-2);
}
.pf-dock-note {
    margin: 0;
    text-align: center;
    font-size: 0.75rem;
    color: var(--pf-ink-3);
}
.pf-dock-note a { color: var(--pf-ai); }
@media (min-width: 600px) {
    .pf-dock { position: static; margin: 22px 0 0; padding: 0; background: none; border: 0; }
}

.pf-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    min-height: 56px;
    padding: 0 20px;
    border: 0;
    border-radius: 16px;
    background: var(--pf-ai);
    color: var(--pf-ai-ink);
    font-size: 1.0625rem;
    font-weight: 700;
    text-decoration: none;
    transition: transform .08s, opacity .15s;
}
.pf-cta:hover { opacity: .92; color: var(--pf-ai-ink); }
.pf-cta:active { transform: scale(.99); }
.pf-cta:disabled { opacity: .45; cursor: not-allowed; }
.pf-cta--ghost {
    min-height: 48px;
    background: var(--pf-surface);
    color: var(--pf-ink);
    border: 1.5px solid var(--pf-line);
    font-size: 0.9375rem;
}
.pf-cta--ghost:hover { color: var(--pf-ink); border-color: var(--pf-ai); }

/* ============================
   集中画面（出題中）
   ============================ */
html.pf-locked,
html.pf-locked body { overflow: hidden; }

.pf-focus {
    position: fixed;
    left: 0; right: 0;
    top: var(--pf-anchor-top);
    bottom: var(--pf-anchor-bottom);
    z-index: 1500;
    display: flex;
    flex-direction: column;
    background: var(--pf-paper);
    padding: env(safe-area-inset-top, 0px) env(safe-area-inset-right, 0px) env(safe-area-inset-bottom, 0px) env(safe-area-inset-left, 0px);
}
.pf-bar {
    flex: none;
    display: flex;
    align-items: center;
    gap: 10px;
    height: 56px;
    padding: 0 8px;
    width: 100%;
    max-width: 1040px;
    margin: 0 auto;
}
.pf-iconbtn {
    flex: none;
    width: 44px; height: 44px;
    display: grid;
    place-items: center;
    border: 0;
    border-radius: 12px;
    background: none;
    color: var(--pf-ink-2);
}
.pf-iconbtn:hover { background: var(--pf-line-2); }
.pf-track {
    position: relative;
    flex: 1;
    min-width: 0;
    height: 6px;
    display: flex;
    gap: 3px;
}
.pf-track i {
    flex: 1;
    border-radius: 3px;
    background: var(--pf-line);
}
.pf-track i.is-ok { background: var(--pf-rokusho); }
.pf-track i.is-ng { background: var(--pf-shu); }
.pf-track i.is-now { background: var(--pf-ai); }
.pf-track--bar { border-radius: 3px; background: var(--pf-line); overflow: hidden; }
.pf-track--bar b { display: block; height: 100%; background: var(--pf-ai); transition: width .25s; }
.pf-count {
    min-width: 56px;
    text-align: center;
    font-size: 0.875rem;
    color: var(--pf-ink-2);
    font-variant-numeric: tabular-nums;
}
.pf-pill {
    flex: none;
    min-width: 44px;
    height: 40px;
    padding: 0 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--pf-line);
    border-radius: 999px;
    background: var(--pf-surface);
    color: var(--pf-ink-3);
}
.pf-pill.is-speaking { border-color: var(--pf-ai); color: var(--pf-ai); background: var(--pf-ai-soft); }

.pf-play {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 640px;
    margin: 0 auto;
}
.pf-q {
    position: relative;
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 8px 16px;
    text-align: center;
    outline: none;
}
.pf-hint { font-size: 0.75rem; color: var(--pf-ink-3); letter-spacing: .1em; }
.pf-kimari {
    margin: 0;
    font-family: var(--pf-uta);
    font-weight: 600;
    font-size: clamp(2.75rem, 15vw, 4.75rem);
    line-height: 1.1;
    letter-spacing: .18em;
    margin-right: -.18em;
    color: var(--pf-ink);
}
.pf-kami {
    margin: 0;
    min-height: 1.6em;
    font-family: var(--pf-uta);
    font-size: 0.9375rem;
    color: var(--pf-ink-2);
    letter-spacing: .04em;
}
.pf-choices {
    flex: none;
    display: grid;
    gap: 8px;
    padding: 0 12px 12px;
}
.pf-choice {
    display: grid;
    grid-template-columns: 28px 1fr 24px;
    align-items: center;
    gap: 10px;
    min-height: 62px;
    padding: 8px 12px;
    border: 1.5px solid var(--pf-line);
    border-radius: 14px;
    background: var(--pf-surface);
    color: var(--pf-ink);
    text-align: left;
    font-family: var(--pf-uta);
    font-size: 1.0625rem;
    line-height: 1.45;
    transition: border-color .12s, background-color .12s, transform .08s, opacity .15s;
}
.pf-choice:not(:disabled):hover { border-color: var(--pf-ai); }
.pf-choice:not(:disabled):active { transform: scale(.99); }
.pf-choice:disabled { cursor: default; }
.pf-num {
    width: 26px; height: 26px;
    display: grid;
    place-items: center;
    border-radius: 7px;
    background: var(--pf-line-2);
    color: var(--pf-ink-3);
    font-family: var(--pf-ui);
    font-size: 0.8125rem;
    font-weight: 700;
}
.pf-mark { opacity: 0; }
.pf-choice.is-correct { border-color: var(--pf-rokusho); background: var(--pf-rokusho-soft); }
.pf-choice.is-correct .pf-num { background: var(--pf-rokusho); color: #fff; }
.pf-choice.is-correct .pf-mark { opacity: 1; color: var(--pf-rokusho); }
.pf-choice.is-wrong { border-color: var(--pf-shu); background: var(--pf-shu-soft); }
.pf-choice.is-wrong .pf-num { background: var(--pf-shu); color: #fff; }
.pf-choice.is-wrong .pf-mark { opacity: 1; color: var(--pf-shu); }
.pf-choice.is-dim { opacity: .45; }

.pf-fb {
    flex: none;
    display: grid;
    gap: 8px;
    padding: 0 12px 14px;
}
.pf-msg {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
    font-size: 0.9375rem;
    font-weight: 700;
}
.pf-msg.is-ok { color: var(--pf-rokusho); }
.pf-msg.is-ng { color: var(--pf-shu); }
.pf-who {
    margin-left: auto;
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--pf-ink-3);
    white-space: nowrap;
}
.pf-who a { color: var(--pf-ai); margin-left: 8px; }
.pf-next { position: relative; overflow: hidden; }
.pf-next-bar {
    position: absolute;
    left: 0; bottom: 0;
    height: 4px;
    width: 0;
    background: var(--pf-ai-ink);
    opacity: .5;
}
.pf-next.is-auto .pf-next-bar { animation: pf-fill 1s linear forwards; }
@keyframes pf-fill { to { width: 100%; } }

.pf-kbd { display: none; }
.pf-kbd kbd {
    margin-right: 4px;
    padding: 0 6px;
    border: 1px solid var(--pf-line);
    border-bottom-width: 2px;
    border-radius: 5px;
    background: var(--pf-surface);
    color: var(--pf-ink-2);
    font-family: var(--pf-ui);
    font-size: 0.6875rem;
}

/* PC: 左に読み札（縦書き）、右に選択肢 */
@media (min-width: 860px) {
    .pf-bar { padding: 0 32px; }
    .pf-play {
        display: grid;
        grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
        grid-template-rows: 1fr auto auto;
        column-gap: 28px;
        max-width: 1040px;
        padding: 8px 32px 0;
    }
    .pf-q {
        grid-row: 1 / 4;
        flex-direction: row-reverse;
        gap: 20px;
        margin-bottom: 20px;
        padding: 24px;
        border: 1px solid var(--pf-line);
        border-radius: 20px;
        background: var(--pf-surface);
    }
    .pf-hint { position: absolute; top: 16px; left: 20px; }
    .pf-kimari {
        writing-mode: vertical-rl;
        font-size: clamp(3.5rem, 7vw, 5.75rem);
        letter-spacing: .22em;
        margin: 0 0 -.22em;
    }
    .pf-kami { writing-mode: vertical-rl; max-height: 100%; font-size: 1rem; }
    .pf-choices { align-self: end; padding: 0; }
    .pf-choice { min-height: 68px; font-size: 1.125rem; }
    .pf-fb { padding: 12px 0 0; }
    .pf-kbd {
        display: flex;
        justify-content: center;
        gap: 14px;
        padding: 14px 0 20px;
        font-size: 0.75rem;
        color: var(--pf-ink-3);
    }
}

/* 終了確認 */
.pf-sheet {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    background: rgba(10, 14, 22, .45);
}
.pf-sheet-box {
    display: grid;
    gap: 10px;
    width: 100%;
    max-width: 420px;
    padding: 20px 16px calc(16px + env(safe-area-inset-bottom, 0px));
    border-radius: 20px 20px 0 0;
    background: var(--pf-surface);
}
.pf-sheet-box h2 { margin: 0; font-size: 1.0625rem; }
.pf-sheet-box p { margin: 0 0 4px; font-size: 0.875rem; color: var(--pf-ink-2); }
@media (min-width: 600px) {
    .pf-sheet { align-items: center; }
    .pf-sheet-box { border-radius: 20px; padding-bottom: 16px; }
}

/* ============================
   結果
   ============================ */
.pf-score {
    margin: 12px 0 0;
    text-align: center;
    font-family: var(--pf-uta);
    font-weight: 600;
    font-size: 4rem;
    line-height: 1;
    font-variant-numeric: tabular-nums;
}
.pf-score small { font-size: 1.5rem; color: var(--pf-ink-3); }
.pf-score-msg { margin: 8px 0 0; text-align: center; color: var(--pf-ink-2); font-size: 0.875rem; }
.pf-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin: 18px 0;
}
.pf-stat {
    padding: 10px;
    border: 1px solid var(--pf-line);
    border-radius: 14px;
    background: var(--pf-surface);
    text-align: center;
}
.pf-stat small { display: block; font-size: 0.6875rem; color: var(--pf-ink-3); }
.pf-stat b { font-size: 1.25rem; font-variant-numeric: tabular-nums; }
.pf-miss-head {
    display: flex;
    justify-content: space-between;
    margin: 0 0 8px;
    font-size: 0.875rem;
}
.pf-miss-head span { color: var(--pf-ink-3); font-weight: 400; }
.pf-miss {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 6px;
}
.pf-miss a {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 12px;
    align-items: center;
    padding: 10px 12px;
    border: 1px solid var(--pf-line);
    border-left: 4px solid var(--pf-shu);
    border-radius: 10px;
    background: var(--pf-surface);
    color: var(--pf-ink);
    text-decoration: none;
}
.pf-miss a:hover { border-color: var(--pf-ai); border-left-color: var(--pf-shu); }
/* style.css の本文リンク下線（.site-main li a:not([class])）を打ち消す */
.pf .pf-miss li a { text-decoration: none; }
.pf-miss-k { min-width: 3.6em; font-family: var(--pf-uta); font-weight: 600; font-size: 1.25rem; }
.pf-miss-s { font-family: var(--pf-uta); font-size: 0.875rem; line-height: 1.45; }
.pf-miss-s small { display: block; font-family: var(--pf-ui); font-size: 0.6875rem; color: var(--pf-ink-3); }
.pf-perfect {
    margin: 0;
    padding: 14px;
    border-radius: 14px;
    background: var(--pf-rokusho-soft);
    color: var(--pf-rokusho);
    text-align: center;
    font-weight: 700;
}
.pf-more {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px 18px;
    margin: 18px 0 0;
    font-size: 0.875rem;
}
.pf-more a { color: var(--pf-ai); padding: 8px 0; }

@media (prefers-reduced-motion: reduce) {
    .pf *, .pf *::after { animation: none !important; transition: none !important; }
}