/* The A-Level Chemistry Tutor booking pages (book.html, bookings.html, stop.html).
   Same palette and type as index.html; contrast: text >= 5:1, borders of inputs 5.7:1, error red 6.5:1. */
:root{
  --bg:#f2f8fd; --card:#ffffff; --alt:#e6f1fa; --soft:#ddeefa;
  --ink:#0f2238; --ink2:#3a4d63; --muted:#56687d;
  --line:#cfe0ef; --accent:#1765ad; --accent-dark:#11528f; --accent-ink:#ffffff;
  --focus:#11528f; --err:#b3261e; --errbg:#fdf0ef; --ok:#1d6b3a; --okbg:#eaf6ee; --warnbg:#fff6e5; --warn:#7a4300;
  color-scheme: light;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
@media (prefers-reduced-motion: reduce){ html{scroll-behavior:auto} *{transition:none!important;animation:none!important} }
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:18px/1.6 Inter,system-ui,-apple-system,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--accent-dark);text-underline-offset:3px}
a[href^="mailto:"]{overflow-wrap:anywhere}
a:hover{color:var(--ink)}
:focus-visible{outline:3px solid var(--focus);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:16px;top:-80px;z-index:100;background:var(--ink);color:#fff;padding:12px 18px;border-radius:10px;font-weight:600;text-decoration:none}
.skip:focus{top:12px;color:#fff}
.wrap{max-width:760px;margin:0 auto;padding:0 20px}
header.top{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:4px 12px;padding-top:14px;padding-bottom:14px}
.brand{display:inline-flex;flex:none;align-items:center;gap:10px;min-height:44px;font:650 22px/1.1 Fraunces,Georgia,serif;letter-spacing:-.01em;color:var(--ink);text-decoration:none}
.brand svg{width:34px;height:34px;flex:none}
.brand b{font-weight:inherit;color:var(--accent)}
@media (max-width:640px){ .brand{font-size:19px;gap:9px} .brand .l{display:block;white-space:nowrap} }
.top .navlink{display:inline-flex;align-items:center;min-height:44px;font-weight:600;font-size:17px;text-decoration:none}
.top .navlink:hover{text-decoration:underline}
main.card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:30px 30px 26px;margin:8px 0 40px}
h1{font:650 clamp(30px,5vw,40px)/1.12 Fraunces,Georgia,serif;letter-spacing:-.02em;margin:0 0 8px}
h2{font:650 clamp(24px,3.6vw,30px)/1.2 Fraunces,Georgia,serif;letter-spacing:-.01em;margin:0 0 10px}
h2:focus{outline:none}
h2:focus-visible{outline:3px solid var(--focus)}
h3{font-size:20px;line-height:1.3;margin:0 0 6px}
p{margin:0 0 14px;color:var(--ink2);max-width:62ch}
b,strong{color:var(--ink)}
.lede{color:var(--ink2);margin-bottom:22px}
.step{font-size:16px;font-weight:600;color:var(--muted);margin:0 0 4px;letter-spacing:.02em}
.view{margin-top:6px}
.view[hidden]{display:none}
.fine{font-size:17px;color:var(--muted)}
.nw{white-space:nowrap}
.vh{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:52px;background:var(--accent);color:var(--accent-ink);text-decoration:none;font-family:inherit;font-weight:600;font-size:18px;line-height:1.3;padding:12px 26px;border-radius:12px;border:2px solid var(--accent);cursor:pointer;transition:background-color .15s}
.btn:hover{background:var(--accent-dark);border-color:var(--accent-dark);color:#fff}
.btn.ghost{background:var(--card);color:var(--accent-dark);border-color:var(--accent)}
.btn.ghost:hover{background:var(--soft);color:var(--ink)}
.btn[aria-disabled="true"],.btn:disabled{cursor:progress;opacity:.85}
.linkbtn{display:inline-flex;align-items:center;min-height:44px;padding:0;background:none;border:0;color:var(--accent-dark);font-family:inherit;font-weight:600;font-size:18px;line-height:1.3;text-decoration:underline;text-underline-offset:3px;cursor:pointer}
.linkbtn:hover{color:var(--ink)}
.actions{display:flex;flex-wrap:wrap;gap:12px 18px;align-items:center;margin:22px 0 0}

/* notices */
.notice{border-radius:12px;padding:14px 16px;margin:0 0 18px;border:2px solid var(--line);background:var(--alt);color:var(--ink)}
.notice p{color:var(--ink);margin:0}
.notice p+p{margin-top:8px}
.notice.ok{border-color:#9fd1b0;background:var(--okbg)}
.notice.warn{border-color:#f0c87a;background:var(--warnbg)}
.notice.bad{border-color:var(--err);background:var(--errbg)}
.notice:focus{outline:3px solid var(--focus);outline-offset:3px}
.errsum{border:3px solid var(--err);border-radius:12px;padding:16px 18px;margin:0 0 22px;background:var(--card)}
.errsum h3{font-size:20px;margin:0 0 8px;color:var(--ink)}
.errsum ul{margin:0;padding-left:20px}
.errsum li{margin:4px 0}
.errsum a{color:var(--err);font-weight:600}
.errsum:focus{outline:3px solid var(--focus);outline-offset:3px}

/* sign-in */
.who-signed{display:flex;flex-wrap:wrap;align-items:center;gap:4px 14px;margin:0 0 18px;padding:10px 14px;border-radius:12px;background:var(--alt);color:var(--ink2);font-size:17px}
.who-signed p{margin:0;color:var(--ink2);font-size:17px;min-width:0;overflow-wrap:anywhere}
.gsi{min-height:52px;display:flex;align-items:center;margin:8px 0 6px}
.loading{color:var(--ink2);font-size:17px}
.spin{display:inline-block;width:18px;height:18px;border:3px solid var(--soft);border-top-color:var(--accent);border-radius:50%;animation:sp 1s linear infinite;vertical-align:-3px;margin-right:8px}
@keyframes sp{to{transform:rotate(360deg)}}

/* form controls */
fieldset{border:0;margin:0 0 26px;padding:0;min-width:0}
legend{font-weight:600;font-size:19px;color:var(--ink);padding:0;margin:0 0 6px}
.field{margin:0 0 26px}
.field>label,.lbl{display:block;font-weight:600;font-size:19px;color:var(--ink);margin:0 0 4px}
.hint{display:block;color:var(--ink2);font-size:17px;margin:0 0 8px}
.ferr{display:block;color:var(--err);font-weight:600;font-size:17px;margin:0 0 8px}
.ferr[hidden]{display:none}
.has-err{border-left:4px solid var(--err);padding-left:14px}
input[type=text],input[type=email],input[type=tel],textarea{display:block;width:100%;max-width:30em;min-height:50px;padding:10px 12px;font:inherit;font-size:18px;color:var(--ink);background:#fff;border:2px solid var(--muted);border-radius:10px}
textarea{min-height:120px;max-width:none;resize:vertical;line-height:1.5}
input[aria-invalid="true"],textarea[aria-invalid="true"]{border-color:var(--err);border-width:3px}
input:focus-visible,textarea:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:10px}
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.tiles.wide{grid-template-columns:1fr}
.tiles.narrow{grid-template-columns:repeat(auto-fill,minmax(100px,1fr))}
.tile{position:relative;display:flex;align-items:flex-start;gap:12px;min-height:52px;padding:12px 14px;background:#fff;border:2px solid var(--line);border-radius:12px;cursor:pointer;color:var(--ink);font-weight:500;line-height:1.35}
.tile:hover{border-color:var(--accent)}
.tile input{flex:none;width:22px;height:22px;margin:1px 0 0;accent-color:var(--accent);cursor:pointer}
.tile.is-checked{border-color:var(--accent);background:var(--soft)}
.tile:has(input:focus-visible){outline:3px solid var(--focus);outline-offset:2px}
.tile input:focus-visible{outline:none}
.tile .t{display:block;font-weight:600}
.tile .d{display:block;color:var(--ink2);font-size:17px;font-weight:400;margin-top:2px}
.tile.off{cursor:not-allowed;border-style:dashed;background:var(--bg)}
.tile.off .t{color:var(--ink2)}
.tile.off input{cursor:not-allowed}
.check{display:flex;align-items:flex-start;gap:12px;min-height:44px;cursor:pointer;font-weight:600;color:var(--ink)}
.check input{flex:none;width:24px;height:24px;margin:2px 0 0;accent-color:var(--accent)}
.field>label.check{display:flex;margin:0}

/* day + time picker: calendar of day cards (one column per weekday), then time chips.
   Radios are visually hidden but stay in the tab order; the whole card is the target (>= 56 px tall).
   Taken times stay in place with a red corner ribbon (CSS only) and an off-screen "unavailable". */
.vh-input{position:absolute;opacity:0;width:1px;height:1px;margin:0;padding:0;border:0;pointer-events:none}
.cal{container-type:inline-size;container-name:cal}
.wkhead{display:none;grid-template-columns:repeat(var(--cols,4),minmax(0,1fr));gap:8px;margin:0 0 6px;font-size:16px;font-weight:600;color:var(--muted);text-align:center}
.days{display:grid;grid-template-columns:repeat(var(--cols,4),minmax(0,1fr));gap:10px}
.day{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;min-width:0;min-height:64px;padding:8px 6px;background:#fff;border:2px solid var(--line);border-radius:12px;cursor:pointer;color:var(--ink);text-align:center;line-height:1.2}
.day:hover{border-color:var(--accent)}
.day .dd{display:block;font-weight:600;font-size:18px;white-space:nowrap;font-variant-numeric:tabular-nums}
.day .df{display:block;font-size:16px;color:var(--ink2);white-space:nowrap}
.day.is-checked{border-color:var(--accent);background:var(--soft);box-shadow:inset 0 0 0 1px var(--accent)}
.day.is-checked .df{color:var(--accent-dark);font-weight:600}
.day.full{cursor:not-allowed;border-style:dashed;background:var(--bg)}
.day.full:hover{border-color:var(--line)}
.day.full .dd{color:var(--ink2)}
.day.full .df{color:var(--muted)}
.times{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;max-width:660px}
.chip{position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center;min-width:0;min-height:56px;padding:0 16px;background:#fff;border:2px solid var(--line);border-radius:12px;cursor:pointer;color:var(--ink)}
.chip:hover{border-color:var(--accent)}
.chip .ct{display:block;font-weight:600;font-size:18px;line-height:1.2;white-space:nowrap;font-variant-numeric:tabular-nums}
.chip.is-checked{border-color:var(--accent);background:var(--soft);box-shadow:inset 0 0 0 1px var(--accent)}
.chip.taken{cursor:not-allowed;background:#f6f7f9;border-color:#d9dee4}
.chip.taken:hover{border-color:#d9dee4}
.chip.taken .ct{color:var(--muted)}
.rib{position:absolute;top:12px;right:-36px;width:120px;padding:1px 0;background:var(--err);color:#fff;font-size:12px;font-weight:700;line-height:17px;letter-spacing:.08em;text-transform:uppercase;text-align:center;transform:rotate(45deg);box-shadow:0 1px 2px rgba(15,34,56,.25);pointer-events:none}
.day:has(input:focus-visible),.chip:has(input:focus-visible){outline:3px solid var(--focus);outline-offset:2px}
@supports not selector(:has(*)){ .day:focus-within,.chip:focus-within{outline:3px solid var(--focus);outline-offset:2px} }
#fs-stime,#fs-mtime{margin-top:4px}
@media (max-width:599px){                     /* fallback for browsers without container queries */
  .wkhead{display:grid}
  .day .wd{display:none}
  .days,.wkhead{gap:8px}
  .day .dd{font-size:17px}
  .times{grid-template-columns:1fr}
}
/* The day grid fits its own width (book page, or the smaller move panel on Your bookings):
   wide: "Mon 9 Nov" in each card; medium: a Mon–Thu header and "9 Nov"; narrow: 2 cards a row with the weekday. */
@container cal (min-width:480px){
  .wkhead{display:none} .day .wd{display:inline} .day .dd{font-size:18px} .days{gap:10px}
}
@container cal (min-width:280px) and (max-width:479.98px){
  .wkhead{display:grid} .day .wd{display:none} .day .dd{font-size:17px} .days,.wkhead{gap:8px}
}
@container cal (min-width:280px) and (max-width:319.98px){
  .day{padding:8px 3px} .day .dd{font-size:16px} .days,.wkhead{gap:6px}
}
@container cal (max-width:279.98px){
  .wkhead{display:none} .days{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
  .day{grid-column:auto!important;grid-row:auto!important;padding:8px 4px} .day .wd{display:inline} .day .dd{font-size:16px}
}
@media (forced-colors:active){ .rib{border:1px solid CanvasText} .day.is-checked,.chip.is-checked{outline:3px solid Highlight} }

/* 14-day right to cancel (paid lessons and packs) */
.consent{margin:18px 0 0;padding:14px 16px;border:2px solid var(--line);border-radius:12px;background:#fff}
.consent .consent-intro{margin:0 0 10px;color:var(--ink)}
.consent .check{font-size:17px;font-weight:500;line-height:1.5}
.consent.has-err{border-color:var(--err);border-left-width:4px;padding-left:14px}

/* summary list */
dl.sum{margin:0 0 20px;border-top:1px solid var(--line)}
dl.sum div{display:grid;grid-template-columns:minmax(120px,32%) 1fr;gap:4px 16px;padding:10px 0;border-bottom:1px solid var(--line)}
dl.sum dt{font-weight:600;color:var(--ink)}
dl.sum dd{margin:0;color:var(--ink2);overflow-wrap:anywhere;white-space:pre-line}
.terms{background:var(--alt);border-radius:12px;padding:14px 16px;margin:0 0 6px}
.terms p{margin:0;color:var(--ink)}
.terms p+p{margin-top:8px}

/* bookings list */
.blist{list-style:none;margin:0;padding:0}
.bk{border:1px solid var(--line);border-radius:16px;padding:18px 18px 8px;margin:0 0 14px;background:#fff}
.bk h3{margin:0 0 4px}
.bk p{margin:0 0 10px}
.bk .actions{margin:4px 0 6px}
.bk .panel{border-top:1px dashed var(--line);margin-top:10px;padding-top:14px}
.tag{display:inline-block;font-size:16px;font-weight:600;color:var(--accent-dark);background:var(--soft);border-radius:999px;padding:2px 10px;margin:0 0 6px}

footer{border-top:1px solid var(--line);padding:22px 0 40px;color:var(--muted);font-size:16px}
footer p{margin:6px 0;color:var(--muted);max-width:none}
footer p:last-child a{display:inline-block;padding:10px 0}

@media (max-width:520px){
  .wrap{padding:0 16px}
  main.card{padding:22px 16px 18px;border-radius:16px}
  .btn{width:100%}
  .actions{flex-direction:column;align-items:stretch}
  .actions .linkbtn{justify-content:center}
  dl.sum div{grid-template-columns:1fr}
}