/* datetime.uk — single shared stylesheet. System fonts only (zero font requests). */
:root{
  --paper:#F7F8FA;--panel:#FFFFFF;--ink:#16202E;--muted:#566171;--rule:#D7DCE3;
  --ball:#C8102E;--on-ball:#FFFFFF;--tint:#FBE9EC;--sel:#E9EEF5;
  --grot:"Helvetica Neue",Helvetica,Arial,system-ui,sans-serif;
  --serif:Charter,"Bitstream Charter","Sitka Text",Cambria,Georgia,serif;
  --w:72rem;color-scheme:light dark
}
@media (prefers-color-scheme:dark){:root{
  --paper:#0E141C;--panel:#151D28;--ink:#E6EAF0;--muted:#9BA6B5;--rule:#2B3545;
  --ball:#FF6670;--on-ball:#1A0A0C;--tint:#3A1D24;--sel:#1F2A39}}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:1.0625rem/1.65 var(--serif);font-kerning:normal}
h1,h2,h3,nav,header,footer,button,input,select,label,table,summary,.ui{font-family:var(--grot)}
h1,h2,h3{line-height:1.15;letter-spacing:-.015em;margin:2.2em 0 .6em;text-wrap:balance}
h1{font-size:clamp(1.75rem,4.5vw,2.6rem);font-weight:800;letter-spacing:-.025em;margin-top:.5em}
h2{font-size:1.5rem;font-weight:800}
h3{font-size:1.125rem;font-weight:700}
p,ul,ol{margin:0 0 1em}
li{margin-bottom:.3em}
a{color:inherit;text-decoration-thickness:1px;text-underline-offset:.18em}
a:hover{color:var(--ball)}
:focus-visible{outline:3px solid var(--ball);outline-offset:2px}
abbr{text-decoration:none}
.skip{position:absolute;left:-999px;top:0}
.skip:focus{left:1rem;top:1rem;background:var(--panel);padding:.5rem 1rem;z-index:9}
.wrap{max-width:var(--w);margin:0 auto;padding:0 1.25rem}
.prose{max-width:42rem}
.lede{font-size:1.2rem;color:var(--muted);max-width:40rem}
.muted{color:var(--muted)}
.center{text-align:center}

/* Header & footer */
.site-head{border-bottom:1px solid var(--rule)}
.site-head .wrap{display:flex;align-items:center;gap:2rem;min-height:3.75rem}
.brand{font:800 1.25rem var(--grot);letter-spacing:-.03em;text-decoration:none;white-space:nowrap}
.brand b{display:inline-block;width:.4em;height:.4em;border-radius:50%;background:var(--ball);margin:0 .07em;vertical-align:.06em}
.nav{display:flex;gap:1.25rem;overflow-x:auto;scrollbar-width:none;font-size:.95rem}
.nav::-webkit-scrollbar{display:none}
.nav a{text-decoration:none;white-space:nowrap;padding:.35rem 0;border-bottom:2px solid transparent}
.nav a[aria-current]{border-color:var(--ball)}
@media (max-width:44rem){.site-head .wrap{flex-wrap:wrap;gap:.2rem 1rem;padding-block:.6rem}.nav{width:100%}}
.crumbs{font:.85rem var(--grot);color:var(--muted);margin:1.25rem 0 0}
.crumbs ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:.4rem}
.crumbs li{margin:0}
.crumbs li+li::before{content:"/";margin-right:.4rem}
.site-foot{border-top:1px solid var(--rule);margin-top:4rem;padding:2rem 0 3rem;font:.9rem/1.6 var(--grot);color:var(--muted)}
.site-foot nav{display:flex;flex-wrap:wrap;gap:.5rem 1.5rem;margin-bottom:1rem}

/* Homepage hero: the live UK clock and the day ruler */
.now{padding:2rem 0 .5rem}
.now h1{font-size:1.05rem;font-weight:700;letter-spacing:0;color:var(--muted);margin:0 0 .5rem}
.now-time{font:800 clamp(4rem,17vw,10.5rem)/.9 var(--grot);letter-spacing:-.05em;font-variant-numeric:tabular-nums;margin:0}
.now-time small{font-size:.2em;letter-spacing:0;color:var(--ball);vertical-align:top;margin-left:.4em}
.now-date{font:700 clamp(1.3rem,3.2vw,1.9rem)/1.2 var(--grot);margin:.75rem 0 0}
.daybar{position:relative;height:10px;margin-top:2rem;border-top:2px solid var(--ink);
  background:repeating-linear-gradient(90deg,var(--ink) 0 1px,transparent 1px calc(100%/24)) top/100% 8px no-repeat}
.daybar::before{content:"";position:absolute;left:0;top:-2px;height:2px;width:calc(var(--p,0)*100%);background:var(--ball)}
.daybar::after{content:"";position:absolute;right:0;top:0;width:1px;height:8px;background:var(--ink)}
.daybar i{position:absolute;top:-8px;left:calc(var(--p,0)*100%);width:14px;height:14px;margin-left:-7px;border-radius:50%;background:var(--ball)}
.dayticks{display:flex;justify-content:space-between;font:.75rem var(--grot);color:var(--muted);margin-top:.15rem}
.now-facts{font-size:1.2rem;max-width:46rem;margin-top:1.75rem}
.local{font:.95rem var(--grot);color:var(--muted)}

/* Link lists */
.quick{display:grid;grid-template-columns:repeat(auto-fill,minmax(15rem,1fr));gap:0 2.5rem;list-style:none;padding:0;margin:1rem 0 0}
.quick li{border-top:1px solid var(--rule);padding:.9rem 0;margin:0}
.quick a{font:700 1.1rem var(--grot);text-decoration:none}
.quick span{display:block;font-size:.95rem;color:var(--muted)}
.dir{columns:15rem;column-gap:2.5rem;margin:1.5rem 0 1rem}
.dir section{break-inside:avoid;margin:0 0 2rem}
.dir h3{margin:0 0 .5rem;padding-top:.5rem;border-top:2px solid var(--ink);font-size:1rem}
.dir ul{list-style:none;padding:0;margin:0;font:.95rem/1.45 var(--grot)}
.dir li{padding:.15rem 0;margin:0}
.dir a{text-decoration:none}
.dir a:hover{text-decoration:underline}
.dir .sub{color:var(--muted);font-size:.85rem}
.links{display:flex;flex-wrap:wrap;gap:.5rem;list-style:none;padding:0;margin:1rem 0 2rem}
.links li{margin:0}

/* Tool panels */
.tool{background:var(--panel);border:1px solid var(--rule);border-radius:8px;padding:clamp(1.25rem,4vw,2.5rem);margin:1.5rem 0 2rem;font-family:var(--grot)}
.readout{display:block;font:800 clamp(3.5rem,15vw,8.5rem)/1 var(--grot);letter-spacing:-.045em;font-variant-numeric:tabular-nums;text-align:center;margin:.25rem 0 1.25rem}
.track{height:6px;background:var(--sel);border-radius:3px;overflow:hidden;margin:0 0 1.5rem}
.track i{display:block;height:100%;background:var(--ball);transform-origin:left;transition:transform .25s linear}
.done .readout{color:var(--ball);animation:blink 1s steps(2) 6}
@keyframes blink{50%{opacity:.25}}
.row{display:flex;flex-wrap:wrap;gap:.75rem;align-items:flex-end;justify-content:center}
.row+.row{margin-top:1rem}
.row.start{justify-content:flex-start}
.field{display:flex;flex-direction:column;gap:.3rem;font-size:.85rem;font-weight:700;color:var(--muted)}
.check{display:flex;gap:.5rem;align-items:center;font-size:.95rem;color:var(--ink);min-height:44px}
.check input{width:1.2rem;height:1.2rem;min-height:0;accent-color:var(--ball)}
input,select{font:500 1.05rem var(--grot);color:var(--ink);background:var(--paper);border:1.5px solid var(--rule);border-radius:4px;padding:.5rem .7rem;min-height:44px}
input[type=number]{width:5.5rem}
input:focus,select:focus{border-color:var(--ink)}
.btn{font:700 1rem var(--grot);min-height:44px;padding:.6rem 1.4rem;border:1.5px solid var(--ink);border-radius:4px;background:transparent;color:var(--ink);cursor:pointer;text-decoration:none;display:inline-flex;align-items:center}
.btn:hover{background:var(--sel);color:var(--ink)}
.btn.go{background:var(--ball);border-color:var(--ball);color:var(--on-ball);min-width:7.5rem;justify-content:center}
.btn.go:hover{filter:brightness(1.08)}
.btn:disabled{opacity:.4;cursor:default}
.chips{display:flex;flex-wrap:wrap;gap:.5rem;justify-content:center;margin-top:1.5rem;padding-top:1.25rem;border-top:1px solid var(--rule)}
.chips button,.chips a{font:600 .9rem var(--grot);min-height:40px;padding:.4rem .8rem;border:1px solid var(--rule);border-radius:4px;background:var(--paper);color:var(--ink);cursor:pointer;text-decoration:none;display:inline-flex;align-items:center}
.chips button:hover,.chips a:hover{border-color:var(--ink)}
.status{text-align:center;min-height:1.6em;font-weight:700;color:var(--ball);margin:.75rem 0 0}
.tool:fullscreen{display:flex;flex-direction:column;justify-content:center;border:0;border-radius:0}
.tool:fullscreen .readout{font-size:min(24vw,40vh)}
.out{margin-top:1.5rem;padding-top:1.25rem;border-top:2px solid var(--ink);min-height:10rem}
.answer{font:800 clamp(1.6rem,5vw,2.4rem)/1.15 var(--grot);letter-spacing:-.02em;margin:0 0 .75rem}
.facts{list-style:none;padding:0;margin:0;display:grid;gap:.35rem}
.facts li{padding-left:.9rem;border-left:3px solid var(--rule);margin:0}

/* Big single answers & countdowns */
.big{font:800 clamp(4rem,18vw,9rem)/.95 var(--grot);letter-spacing:-.05em;text-align:center;margin:0;font-variant-numeric:tabular-nums}
.big-sub{text-align:center;font:700 1.2rem/1.4 var(--grot);margin:.6rem 0 0}
.cd{display:grid;grid-template-columns:repeat(4,1fr);gap:.5rem;text-align:center;max-width:34rem;margin:1.75rem auto 0;padding-top:1.25rem;border-top:1px solid var(--rule)}
.cd b{display:block;font:800 clamp(1.9rem,8vw,3.4rem)/1 var(--grot);letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.cd span{font-size:.85rem;color:var(--muted)}
.cd-today{display:none}
.is-today .cd-wait{display:none}
.is-today .cd-today{display:block}

/* Tables */
.tbl{overflow-x:auto;margin:1rem 0 2rem}
table{border-collapse:collapse;width:100%;font-size:.95rem;font-variant-numeric:tabular-nums}
th,td{text-align:left;padding:.55rem .75rem .55rem 0;border-bottom:1px solid var(--rule);vertical-align:top}
th:first-child,td:first-child{padding-left:.5rem}
thead th{font-size:.8rem;color:var(--muted);font-weight:700;border-bottom:2px solid var(--ink)}
tbody th{font-weight:700}
tr.past{color:var(--muted)}
tr.next,tr.now{background:var(--tint)}
tr.next td,tr.now td{font-weight:700}
td.t{font-weight:800;font-size:1.1rem}

/* Calendars */
.cal{display:grid;grid-template-columns:repeat(auto-fill,minmax(16rem,1fr));gap:2rem 2.5rem;margin:1.5rem 0 2.5rem}
.cal:empty{min-height:110rem}
@media (min-width:52rem){.cal:empty{min-height:62rem}}
.cal.one{grid-template-columns:1fr;max-width:40rem}
.month h3{margin:0 0 .4rem;font-size:1.05rem}
.month h3 a{text-decoration:none}
.month table{font-size:.88rem;table-layout:fixed}
.month th,.month td{text-align:center;padding:.3rem 0;border:0}
.month thead th{border-bottom:1px solid var(--ink);font-size:.72rem}
.month .wk{color:var(--muted);font-size:.7rem;font-weight:400;border-right:1px solid var(--rule)}
.month .we{color:var(--muted)}
.month .hol{color:var(--ball);font-weight:800;background:var(--tint)}
.month .today{background:var(--ink);color:var(--paper);font-weight:800;border-radius:3px}
.cal.one table{font-size:1.15rem}
.cal.one td{padding:.8rem 0}
.mh{list-style:none;padding:0;margin:.5rem 0 0;font:.78rem/1.4 var(--grot);color:var(--muted)}
.mh li{margin:0}
.mh b{color:var(--ball);margin-right:.25rem}
.key{display:flex;gap:1.25rem;flex-wrap:wrap;align-items:center;font:.85rem var(--grot);color:var(--muted);margin:0}
.key i{display:inline-block;width:.9rem;height:.9rem;vertical-align:-.1rem;margin-right:.35rem;border-radius:2px}
.key .k-hol{background:var(--tint);outline:1px solid var(--ball)}
.key .k-today{background:var(--ink)}
.row+.key{margin-top:1rem}

/* FAQ */
.faq{margin:1rem 0 0}
.faq details{border-top:1px solid var(--rule);padding:.9rem 0}
.faq details:last-child{border-bottom:1px solid var(--rule)}
.faq summary{font-weight:700;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--ball);font-weight:800}
.faq details[open] summary::after{content:"\2212"}
.faq p{margin:.6rem 0 0}

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

/* Print: calendars fit one A4 landscape page */
@page cal{size:A4 landscape;margin:9mm}
@media print{
  body:has(.cal:not(.one)),body:has(.cal.one~.cal.one){page:cal}
  body:has(.cal)::after{content:"datetime.uk";position:fixed;left:0;right:0;bottom:0;text-align:center;font:700 9pt var(--grot);letter-spacing:.02em;color:#555}
  .site-head,.site-foot,.crumbs,.noprint,.btn,.chips{display:none!important}
  body{background:#fff;color:#000;font-size:10pt}
  .tool{border:0;padding:0;margin:0}
  h1{font-size:16pt;margin:0 0 3mm}
  .cal{grid-template-columns:repeat(4,1fr);gap:4mm 7mm;margin:0}
  .month{break-inside:avoid}
  .month table{font-size:8pt}
  .month td,.month th{padding:.5mm 0}
  .month .today{background:none;color:#000;outline:1px solid #000}
  .month .hol{background:#eee;color:#000}
  .mh{font-size:6.5pt;color:#333}
}

/* page: academic-calendar (several single months print four across) */
@media print{main:has(.cal.one~.cal.one) .cal.one{display:inline-grid;width:24%;margin:0 0 4mm;vertical-align:top}main:has(.cal.one~.cal.one) .cal.one table{font-size:8pt}main:has(.cal.one~.cal.one) .cal.one td{padding:.5mm 0}}
/* page: meeting-planner */
[data-m-grid] td b{background:var(--tint)}[data-m-grid] mark{background:var(--sel);color:inherit}
/* page: calendar month (print as a full-page planner grid) */
@media print{body:has(.cal.one):not(:has(.cal.one~.cal.one)){
  .lede,.cal.one .month h3{display:none}
  .cal.one{max-width:none;margin-top:4mm}
  .cal.one table{font-size:15pt}
  .cal.one th,.cal.one td{border:1px solid #bbb}
  .cal.one tbody td{height:31mm;vertical-align:top;text-align:left;padding:1.5mm 2mm}
  .cal.one tbody th{vertical-align:top;padding-top:2mm;font-size:8pt}
  .mh{font-size:9pt;margin-top:3mm}
}}