/* 慶成塾 予約フォーム：テーマに依存しないよう .ksb 内で完結 */
.ksb{--ksb-blue:#1f5fd0;--ksb-navy:#1d2088;--ksb-grad:linear-gradient(90deg,#1d2088,#2f86e8);--ksb-acc:#ff5310;--ksb-line:#e2e6ec;--ksb-gray:#f5f7f9;--ksb-ink:#222;--ksb-ink2:#555a66;color:var(--ksb-ink);font-size:16px;line-height:1.8}
.ksb *{box-sizing:border-box;border-radius:0}
.ksb-form{background:#fff;border:1px solid var(--ksb-line);padding:clamp(20px,4vw,44px)}
.ksb-hp{position:absolute!important;left:-9999px!important;width:1px;height:1px;opacity:0}
.ksb-step{margin:0 0 40px}
.ksb-h{display:flex;align-items:baseline;gap:14px;font-size:1.15rem;font-weight:900;margin:0 0 18px;padding-bottom:10px;border-bottom:1px solid var(--ksb-line)}
.ksb-h span{font-family:"Oswald","Noto Sans JP",sans-serif;font-weight:500;font-size:.95rem;letter-spacing:.12em;color:var(--ksb-blue)}
.ksb-sub{font-weight:700;margin:22px 0 10px}
.ksb-choice{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.ksb-choice3{grid-template-columns:repeat(3,1fr)}
.ksb-choice label{position:relative;display:grid;gap:2px;border:1px solid #c9d0db;padding:16px 14px 16px 46px;cursor:pointer;background:#fff;transition:border-color .2s,background .2s}
.ksb-choice label b{font-weight:900}
.ksb-choice label span{font-size:.82rem;color:var(--ksb-ink2)}
.ksb-choice input{position:absolute;left:16px;top:20px;width:18px;height:18px;margin:0;accent-color:var(--ksb-blue)}
.ksb-choice label:has(input:checked){border-color:var(--ksb-blue);background:#f2f7fe;box-shadow:inset 0 0 0 1px var(--ksb-blue)}
.ksb-choice label:focus-within{outline:2px solid var(--ksb-blue);outline-offset:2px}
/* カレンダー */
.ksb-cal{border:1px solid var(--ksb-line);max-width:560px}
.ksb-cal-hd{display:flex;align-items:center;justify-content:space-between;background:var(--ksb-grad);color:#fff}
.ksb-month{margin:0;font-weight:900;font-size:1.1rem}
.ksb-nav{width:52px;height:52px;border:0;background:transparent;color:#fff;font-size:1.6rem;cursor:pointer}
.ksb-nav:disabled{opacity:.3;cursor:default}
.ksb-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:1px;background:var(--ksb-line);padding:1px}
.ksb-grid .wd{background:var(--ksb-gray);text-align:center;font-size:.8rem;font-weight:700;padding:6px 0}
.ksb-grid .wd.sun{color:#d14343}.ksb-grid .wd.sat{color:var(--ksb-blue)}
.ksb-grid .blank{background:#fff}
.ksb-grid .day{background:#fff;aspect-ratio:1/0.85;display:grid;place-items:center;align-content:center;font-family:"Oswald","Noto Sans JP",sans-serif;font-size:1.05rem;border:0;padding:0;line-height:1.1;color:#b6bcc6}
.ksb-grid .day small{font-family:"Noto Sans JP",sans-serif;font-size:.62rem;color:#b6bcc6}
.ksb-grid .day.full{background:#f1f2f5}
.ksb-grid .day.ok{color:var(--ksb-blue);font-weight:600;cursor:pointer;background:#eef4fd;box-shadow:inset 0 0 0 1px #c7d6ef}
.ksb-grid .day.ok:hover{background:#dce8fb}
.ksb-grid .day.ok.on{background:var(--ksb-grad);color:#fff;box-shadow:none}
.ksb-loading{grid-column:1/-1;background:#fff;margin:0;padding:40px 10px;text-align:center;color:var(--ksb-ink2)}
.ksb-legend{display:flex;flex-wrap:wrap;gap:6px 18px;margin:0;padding:10px 14px;font-size:.8rem;color:var(--ksb-ink2);border-top:1px solid var(--ksb-line)}
.ksb-legend .lg::before{content:"";display:inline-block;width:12px;height:12px;margin-right:6px;vertical-align:-1px;border:1px solid #c7d6ef;background:#eef4fd}
.ksb-legend .full::before{background:#f1f2f5;border-color:#e0e3e8}
.ksb-legend .none::before{background:#fff;border-color:#e0e3e8}
.ksb-times{margin-top:18px;max-width:560px}
.ksb-tdate{font-weight:900;margin:0 0 10px}
.ksb-tlist{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:8px}
.ksb-tlist .slot{border:1px solid var(--ksb-blue);background:#fff;color:var(--ksb-blue);font-weight:700;padding:14px 10px;cursor:pointer;font-size:.95rem}
.ksb-tlist .slot:hover{background:#eef4fd}
.ksb-tlist .slot.on{background:var(--ksb-grad);color:#fff;border-color:transparent}
.ksb-hint{color:var(--ksb-ink2);font-size:.9rem;margin:0}
.ksb-picked{margin:16px 0 0;padding:12px 16px;border-left:3px solid var(--ksb-acc);background:#fff6f1}
/* 入力欄 */
.ksb-fr{display:grid;grid-template-columns:210px 1fr;gap:8px 20px;padding:14px 0;border-bottom:1px solid var(--ksb-line);align-items:start}
.ksb-fr label{font-weight:700;padding-top:10px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.ksb-fr em{font-style:normal;font-size:.7rem;font-weight:700;color:#fff;background:var(--ksb-acc);padding:1px 8px}
.ksb-fr em.opt{background:#9aa1ad}
.ksb input[type=text],.ksb input[type=email],.ksb input[type=tel],.ksb select,.ksb textarea{width:100%;max-width:520px;font:inherit;font-size:16px;padding:12px 14px;border:1px solid #c9d0db;background:#fff;color:var(--ksb-ink)}
.ksb textarea{min-height:130px;max-width:none}
.ksb-note{margin:6px 0 0;font-size:.8rem;color:var(--ksb-ink2)}
.ksb-fr > div{min-width:0}
.ksb input:focus,.ksb select:focus,.ksb textarea:focus{outline:2px solid var(--ksb-blue);outline-offset:0}
.ksb-agree{display:flex;align-items:center;justify-content:center;gap:10px;margin:26px 0 0;font-weight:700}
.ksb-agree input{width:20px;height:20px;accent-color:var(--ksb-blue)}
.ksb-agree a{color:var(--ksb-blue);text-decoration:underline}
.ksb-error{white-space:pre-line;color:#c0262d;background:#fdf0f0;border:1px solid #f1c0c0;padding:14px 18px;margin:0 0 20px}
.ksb-submit{display:flex;justify-content:center}
.ksb-submit button{min-width:320px;min-height:60px;border:0;background:var(--ksb-acc);color:#fff;font:inherit;font-weight:900;font-size:1.05rem;letter-spacing:.06em;cursor:pointer}
.ksb-submit button:disabled{opacity:.6;cursor:default}
.ksb-done{background:#fff;border:1px solid var(--ksb-line);border-top:3px solid var(--ksb-blue);padding:48px 28px;text-align:center}
.ksb-done-en{font-family:"Oswald",sans-serif;font-size:2.4rem;line-height:1;margin:0;background:var(--ksb-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.ksb-done h3{font-size:1.4rem;font-weight:900;margin:14px 0 8px}
.ksb-done-when{font-weight:900;color:var(--ksb-blue);font-size:1.1rem}
.ksb-done a{color:#05a347;font-weight:700;text-decoration:underline}
.ksb [hidden]{display:none!important}
@media (max-width:760px){
  .ksb-choice,.ksb-choice3{grid-template-columns:1fr}
  .ksb-fr{grid-template-columns:1fr;gap:6px}
  .ksb-fr label{padding-top:0}
  .ksb-submit button{min-width:0;width:100%}
  .ksb-tlist{grid-template-columns:1fr 1fr}
}