/* Breathe Clear Teacher Hub — "the shift": ER tracking board + projector present mode */
:root{--navy:#0b1f3a;--deep:#06121f;--chart:#f4f7fa;--ink:#0b1f3a;--muted:#5a6a7e;--line:#d9e1ea;--blue:#1f6feb;--sky:#57c4ff;--red:#d42b2b;--amber:#e0900d;--wave:#3cff6a;--green:#1a9c5b;--d:'Barlow Condensed','Arial Narrow',sans-serif;--b:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.6 var(--b);color:var(--ink);background:var(--chart)}
a{color:var(--blue)}:focus-visible{outline:3px solid var(--sky);outline-offset:2px}
.wrap{max-width:1040px;margin:0 auto;padding:0 24px}

/* top: monitor bay */
.hd{position:relative;background:var(--deep);color:#fff;overflow:hidden;padding:calc(env(safe-area-inset-top,0px) + 16px) 0 0}
.hd .bar{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;font-size:14px;position:relative;z-index:2}
.brand{font:800 24px/1 var(--d);color:#fff;text-decoration:none}.brand span{color:var(--sky)}
.crumbs{display:flex;gap:4px;flex-wrap:wrap}
.crumbs a{color:rgba(255,255,255,.72);text-decoration:none;padding:6px 10px;border-radius:6px}
.crumbs a:hover{color:#fff;background:rgba(255,255,255,.08)}.crumbs a[aria-current]{color:#fff;background:rgba(87,196,255,.16)}
.hd .title{position:relative;z-index:2;padding:46px 0 26px;max-width:760px}
.hd h1{font:800 clamp(44px,7vw,84px)/.9 var(--d);margin:0 0 16px;letter-spacing:-.005em}
.hd p{color:rgba(255,255,255,.8);max-width:640px;margin:0;font-size:17.5px}
.hd .kicker{font:600 15px var(--b);color:var(--sky);margin-bottom:12px}
.ecg{display:block;width:100%;height:92px;position:relative;z-index:1}
.ecg path{fill:none;stroke:var(--wave);stroke-width:2.2;stroke-linejoin:round;filter:drop-shadow(0 0 6px rgba(60,255,106,.55))}
.ecg .grid{stroke:rgba(60,255,106,.08);stroke-width:1}
@media(prefers-reduced-motion:no-preference){.ecg path.trace{stroke-dasharray:2400;stroke-dashoffset:2400;animation:draw 2.6s cubic-bezier(.4,.1,.2,1) .2s forwards}}
@keyframes draw{to{stroke-dashoffset:0}}

main{padding-bottom:40px}
h2{font:800 clamp(28px,3.6vw,38px)/1 var(--d);margin:52px 0 12px}
h3{font-size:18px;margin:22px 0 6px}
h4{font:700 15px var(--b);margin:18px 0 4px;color:var(--navy)}
.sub{color:var(--muted);max-width:720px}

/* the tracking board */
.board{margin-top:-1px;background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;overflow:hidden;box-shadow:0 30px 60px -40px rgba(6,18,31,.6)}
.board-head,.row{display:grid;grid-template-columns:76px minmax(0,1.4fr) minmax(0,2fr) 150px 92px;align-items:center;gap:16px;padding:0 22px}
.board-head{background:var(--navy);color:rgba(255,255,255,.62);font:700 13px var(--b);height:42px}
.row{min-height:84px;border-top:1px solid var(--line);text-decoration:none;color:inherit;position:relative;transition:background .15s}
.row:hover{background:#f2f7fd}.row:hover .room{background:var(--blue)}
.room{font:800 26px/1 var(--d);color:#fff;background:var(--navy);width:52px;height:52px;border-radius:10px;display:grid;place-items:center;transition:background .15s}
.row .who{font:700 22px/1.1 var(--d)}.row .why{color:var(--muted);font-size:14.5px;line-height:1.45}
.status{display:inline-flex;align-items:center;gap:8px;font:600 13.5px var(--b);white-space:nowrap}
.status i{width:10px;height:10px;border-radius:50%;background:var(--green);box-shadow:0 0 0 4px rgba(26,156,91,.15)}
.status.first i{background:var(--red);box-shadow:0 0 0 4px rgba(212,43,43,.15)}
.status.prep i{background:var(--amber);box-shadow:0 0 0 4px rgba(224,144,13,.18)}
.time{font:700 20px var(--d);text-align:right;font-variant-numeric:tabular-nums}
@media(max-width:760px){.board-head{display:none}.row{grid-template-columns:52px 1fr;grid-template-areas:"room who" "room why" ". meta";gap:4px 14px;padding:16px 18px}
 .room{grid-area:room;width:44px;height:44px;font-size:22px}.row .who{grid-area:who}.row .why{grid-area:why}.row .status{grid-area:meta}.row .time{display:none}}

/* lesson pages */
.lessons{display:grid;grid-template-columns:220px minmax(0,1fr);gap:32px;align-items:start;margin-top:34px}
.rail{position:sticky;top:18px;display:grid;gap:6px}
.rail a{display:grid;grid-template-columns:34px 1fr;gap:10px;align-items:center;text-decoration:none;color:var(--ink);padding:8px 10px;border-radius:10px;font-size:14.5px;line-height:1.3}
.rail a b{font:800 20px var(--d);width:34px;height:34px;border-radius:8px;display:grid;place-items:center;background:#e6edf5;color:var(--navy)}
.rail a:hover{background:#fff}.rail a:hover b{background:var(--navy);color:#fff}
@media(max-width:860px){.lessons{grid-template-columns:1fr}.rail{position:static;grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}}
.lesson{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px;margin:0 0 26px}
.lesson-top{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;flex-wrap:wrap}
.lesson h2{margin:0 0 8px}
.meta{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 6px}
.meta span{font-size:13px;color:var(--muted);background:var(--chart);border-radius:6px;padding:3px 9px}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:6px 28px}@media(max-width:640px){.cols{grid-template-columns:1fr}}
.plan{list-style:none;margin:8px 0;padding:0;border-left:3px solid var(--navy)}
.plan li{display:grid;grid-template-columns:78px 1fr;gap:14px;padding:10px 0 10px 16px;position:relative}
.plan li::before{content:"";position:absolute;left:-7px;top:17px;width:11px;height:11px;border-radius:50%;background:#fff;border:3px solid var(--navy)}
.plan b{font:700 17px var(--d);color:var(--blue);font-variant-numeric:tabular-nums}
@media(max-width:560px){.plan li{grid-template-columns:1fr;gap:0}}
.present{display:inline-flex;align-items:center;gap:10px;font:700 15px var(--b);padding:11px 18px;border-radius:999px;border:0;background:var(--red);color:#fff;cursor:pointer;box-shadow:0 10px 24px -12px rgba(212,43,43,.8)}
.present::before{content:"";width:9px;height:9px;border-radius:50%;background:#fff;animation:pulse 1.2s infinite}
@keyframes pulse{50%{opacity:.25}}@media(prefers-reduced-motion:reduce){.present::before{animation:none}}
.note{background:#fff8e6;border-left:4px solid var(--amber);border-radius:8px;padding:12px 16px;font-size:15px;margin:14px 0}
.safe{background:#eaf4ff;border-left:4px solid var(--blue);border-radius:8px;padding:12px 16px;font-size:15px;margin:14px 0}
.warn{background:#fdeeee;border-left:4px solid var(--red);border-radius:8px;padding:12px 16px;font-size:15px;margin:14px 0}
table{width:100%;border-collapse:collapse;background:#fff;font-size:14.5px;margin:8px 0;border:1px solid var(--line)}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--navy);color:rgba(255,255,255,.85);font:700 13px var(--b)}
.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:12px}
.btn{display:inline-block;font:700 15px var(--b);padding:11px 18px;border-radius:10px;text-decoration:none;background:var(--blue);color:#fff;border:2px solid var(--blue);cursor:pointer}
.btn.line{background:#fff;color:var(--blue)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;display:block;color:inherit;text-decoration:none}
.card h3{margin:10px 0 4px}
.vid{position:relative;aspect-ratio:9/16;max-height:480px;border-radius:10px;overflow:hidden;background:#000}
.vid.wide{aspect-ratio:16/9;max-height:none}
.vid iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
footer{margin-top:40px;padding:28px 0 calc(env(safe-area-inset-bottom,0px) + 28px);background:var(--deep);color:rgba(255,255,255,.6);font-size:14px}
footer a{color:var(--sky)}

/* present mode: the projector view */
.pm{position:fixed;inset:0;z-index:100;background:var(--deep);color:#fff;display:none;flex-direction:column}
.pm.on{display:flex}
.pm-top{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 28px;font-size:15px;color:rgba(255,255,255,.7)}
.pm-top b{color:#fff;font:700 18px var(--d)}
.pm-clock{font:800 clamp(40px,6vw,64px)/1 var(--d);color:var(--wave);font-variant-numeric:tabular-nums;text-shadow:0 0 18px rgba(60,255,106,.45)}
.pm-clock.over{color:var(--red);text-shadow:0 0 18px rgba(212,43,43,.5)}
.pm-body{flex:1;display:flex;flex-direction:column;justify-content:center;padding:0 clamp(28px,7vw,110px)}
.pm-step{font:700 18px var(--b);color:var(--sky);margin-bottom:14px}
.pm-text{font:800 clamp(34px,4.8vw,64px)/1.08 var(--d);max-width:1200px}
.pm-strip{height:70px;margin:0 28px}
.pm-strip path{fill:none;stroke:rgba(60,255,106,.25);stroke-width:2}
.pm-strip path.done{stroke:var(--wave);filter:drop-shadow(0 0 5px rgba(60,255,106,.6))}
.pm-ctl{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:16px 28px calc(env(safe-area-inset-bottom,0px) + 20px)}
.pm-ctl button{font:700 16px var(--b);padding:12px 20px;border-radius:10px;border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.06);color:#fff;cursor:pointer}
.pm-ctl button.go{background:var(--blue);border-color:var(--blue)}
.pm-ctl .hint{color:rgba(255,255,255,.5);font-size:13.5px}
@media print{.hd{background:#fff;color:var(--ink)}.hd p,.hd .kicker{color:var(--ink)}.ecg,.crumbs,.present,.rail,footer,.noprint{display:none}.lessons{display:block}.lesson{border:0;padding:0;break-inside:avoid-page}}