/* PROOF 50 — paper lab notebook. Warm ivory paper, ink-blue text,
   annotation-red accents, Georgia serif display, ruled lines, 3px corners.
   Motion verb: turn. Phone-first, 48px targets, no horizontal scroll,
   no reveal gating. */
:root{
  --bg:#f6f2e9; --panel:#fffdf6; --panel2:#ede7d8; --ink:#1b2430; --steel:#5a6770;
  --volt:#1e3fae; --volt-ink:#fffdf6; --line:#c9c0aa; --danger:#b3261e; --warn:#8a5a00;
  --red:#b3402a;
  --disp:Georgia,"Times New Roman",serif;
  --text:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:var(--text);font-size:16px;line-height:1.45}
body{background-image:repeating-linear-gradient(transparent,transparent 27px,rgba(27,36,48,.05) 28px)}
button{touch-action:manipulation}
:focus-visible{outline:3px solid var(--volt);outline-offset:2px}
body{max-width:560px;margin:0 auto;padding:0 14px 96px}
body.large{font-size:19px}
h1,h2,h3{font-family:var(--disp);letter-spacing:.01em;margin:.4em 0}
button,input,select,textarea{font:inherit;color:inherit}
.topbar{position:sticky;top:0;z-index:30;background:var(--bg);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:10px;padding:10px 2px}
.wordmark{font-family:var(--disp);font-weight:700;font-size:20px;letter-spacing:.06em}
.volt{color:var(--volt)}
.spec-strip{font-family:var(--disp);font-size:12px;color:var(--steel);letter-spacing:.12em;flex:1}
.spec-label{font-family:var(--text);font-weight:700;font-size:12px;letter-spacing:.14em;color:var(--red);text-transform:uppercase;margin-bottom:6px}
.icon-btn{min-height:48px;min-width:48px;background:var(--panel);border:1px solid var(--line);border-radius:4px;padding:8px 12px;cursor:pointer}
.view{display:none;padding-top:12px}
.view.active{display:block;animation:turn .18s ease-out}
@keyframes turn{from{opacity:0;transform:translateX(6px)}to{opacity:1;transform:none}}
.view-title{font-size:26px}
.view-sub{color:var(--steel);margin-top:0}
.sec-title{font-size:18px;margin-top:26px;border-top:1px solid var(--line);padding-top:14px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:3px;padding:16px;margin:12px 0}
.hero-card{border-color:var(--ink);border-left:5px solid var(--red)}
.hint{color:var(--steel);font-size:14px}
.warn{color:var(--warn)}
.warn-card{border-color:var(--warn)}
.done-stamp{color:var(--volt);font-family:var(--disp);letter-spacing:.1em}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:10px 18px;border-radius:3px;border:1px solid var(--line);background:var(--panel2);cursor:pointer;font-family:var(--disp);letter-spacing:.08em;text-transform:uppercase;font-size:15px}
.btn-main{background:var(--volt);color:var(--volt-ink);border-color:var(--volt);font-weight:700}
.btn-inv{background:var(--ink);color:var(--bg)}
.btn-danger{border-color:var(--danger);color:var(--danger)}
.btn:disabled{opacity:.5}
.row-gap{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.tabbar{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:560px;display:flex;background:var(--panel);border-top:2px solid var(--ink);z-index:40;padding-bottom:env(safe-area-inset-bottom)}
.tab{flex:1;min-height:56px;background:none;border:none;font-family:var(--disp);letter-spacing:.14em;font-size:14px;color:var(--steel);cursor:pointer}
.tab.active{color:var(--volt);box-shadow:inset 0 3px 0 var(--red);font-weight:700}
.week-strip{display:flex;gap:6px}
.wk-cell{flex:1;border:1px solid var(--line);border-radius:4px;padding:8px 2px;text-align:center;background:var(--panel)}
.wk-cell span{font-family:var(--disp);font-size:18px;display:block}
.wk-cell small{color:var(--steel);font-size:10px}
.wk-cell.today{border-color:var(--volt)}
.wk-cell.done span{color:var(--volt)}
.week-rail{display:flex;gap:6px;overflow-x:auto;padding:4px 0 10px}
.rail-chip{flex:0 0 auto;min-width:48px;min-height:48px;border:1px solid var(--ink);background:var(--panel);border-radius:3px;font-family:var(--disp);font-size:16px;cursor:pointer;padding:8px 10px}
.rail-chip.on{background:var(--volt);color:var(--volt-ink);border-color:var(--volt)}
.plan-day{width:100%;background:none;border:none;border-bottom:1px solid var(--line);cursor:pointer;text-align:left;color:inherit;font:inherit}
.proto-list{list-style:none;margin:8px 0;padding:0}
.proto-list li{display:flex;justify-content:space-between;gap:10px;padding:7px 0;border-bottom:1px dashed var(--line)}
.spark{width:100%;height:42px;display:block}
.you-more{margin-top:34px;border-top:2px solid var(--ink);padding-top:16px}
.day-row{display:flex;justify-content:space-between;gap:10px;padding:8px 0;border-bottom:1px solid var(--line)}
.day-row .spec{font-family:var(--disp);color:var(--volt)}
.prog-row{display:grid;grid-template-columns:54px 1fr auto;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid var(--line)}
.prog-row .spec{font-family:var(--disp);color:var(--volt);white-space:nowrap;font-size:13px;letter-spacing:.03em}
.prog-name{min-width:0;font-weight:600}
.prog-meta{white-space:nowrap;color:var(--steel);font-size:13px;text-align:right}
.acc-head{width:100%;display:flex;justify-content:space-between;align-items:center;min-height:48px;background:none;border:none;cursor:pointer;font-family:var(--disp);letter-spacing:.08em;text-align:left;padding:6px 0}
.acc-body{padding:6px 0 10px}
.opt-list{display:grid;gap:8px;margin:10px 0}
.opt{min-height:52px;text-align:left;background:var(--panel2);border:1px solid var(--line);border-radius:4px;padding:12px;cursor:pointer}
.opt:active{border-color:var(--volt)}
.field{display:block;margin:10px 0;font-family:var(--disp);letter-spacing:.05em;font-size:14px}
.field input,.field select,.field textarea{display:block;width:100%;margin-top:6px;min-height:48px;background:var(--panel);border:1px solid var(--line);border-radius:3px;padding:10px;color:var(--ink)}
.toggle-row{display:flex;align-items:center;gap:12px;min-height:48px;margin:10px 0;cursor:pointer}
.toggle-row span:first-child{flex:1}
.toggle-row small{display:block;color:var(--steel)}
.toggle-row input{width:26px;height:26px;accent-color:var(--volt)}
.check-row{display:flex;gap:10px;align-items:flex-start;min-height:48px;padding:8px 0;border-bottom:1px solid var(--line);cursor:pointer}
.check-row input{width:24px;height:24px;accent-color:var(--volt)}
.overlay{position:fixed;inset:0;z-index:60;background:rgba(27,36,48,.55);overflow-y:auto;padding:18px 14px 40px}
.overlay-card{max-width:520px;margin:4vh auto;background:var(--panel);border:1px solid var(--ink);border-radius:3px;padding:20px;position:relative}
.close-x{position:absolute;top:8px;right:8px}
.player-overlay{background:var(--bg);max-width:560px;margin:0 auto;left:0;right:0}
.player-head{position:sticky;top:0;background:var(--bg);display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding:8px 0;z-index:5}
.player-clock{font-family:var(--disp);color:var(--steel);letter-spacing:.1em}
.why{font-size:17px}
.last-time{background:var(--panel2);border-left:3px solid var(--volt);padding:10px 12px;font-family:var(--disp);letter-spacing:.03em}
.set-form input{font-size:18px}
.rest-bar{height:10px;background:var(--panel2);border:1px solid var(--line)}
.rest-fill{height:100%;background:var(--volt);width:100%}
.rest-time{font-family:var(--disp);font-size:64px;text-align:center;margin:12px 0}
.big-num{font-family:var(--disp);font-size:40px;color:var(--volt)}
.lab-table{border:1px solid var(--line)}
.lt-row{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;border-bottom:1px solid var(--line)}
.lt-row span{padding:8px;font-size:14px}
.lt-head span{font-family:var(--disp);color:var(--volt)}
.peek{background:var(--panel2);border:1px solid var(--line);padding:12px;margin:12px 0;font-size:14px}
.copy-line{word-break:break-all;background:var(--panel2);padding:10px;border:1px solid var(--line);font-family:var(--disp)}
.toast{position:fixed;bottom:76px;left:50%;transform:translateX(-50%);width:calc(100% - 28px);max-width:520px;background:var(--ink);color:var(--bg);padding:14px;border-radius:3px;z-index:80;font-weight:600;text-align:center}
.disclaimer-line{color:var(--steel);font-size:13px;margin-top:20px}
.note-card{border-left:3px solid var(--volt)}
ul{margin:6px 0;padding-left:20px}
@media print{
  .tabbar,.topbar .icon-btn,.btn{display:none!important}
  body{background:#fff;color:#000;max-width:none}
  .card,.day-cell,.wk-cell{border-color:#999;background:#fff;color:#000}
  .view{display:block!important}
}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}
  .view.active{animation:none}
}

/* FluentFuel embed (Fuel tab) */
.fuel-wrap { background:var(--panel); border:1px solid var(--line); border-radius:4px; padding:14px; }
.fuel-frame { width:100%; border:0; min-height:75dvh; border-radius:2px; background:var(--panel); display:block; }
.fuel-direct { margin-top:12px; }
.fuel-direct a { color:var(--volt); }
iframe.ff-fuel-expanded { position:fixed!important; inset:0!important; width:100%!important; height:100dvh!important; z-index:99990!important; border:0!important; border-radius:0!important; }
#ff-fuel-collapse { position:fixed; top:10px; right:10px; z-index:99999; width:48px; height:48px; border-radius:50%; border:0; background:rgba(20,20,20,.85); color:#fff; font-size:20px; line-height:1; cursor:pointer; }