/* ============================================================
   hopala — SHEET-DOS exhibit
   Same design system as hopala.io (warm paper, coral + sage,
   Fredoka headings, Assistant body). Self-contained so the
   directory can be served from anywhere, including a bare
   python -m http.server.

   Logical properties throughout, so the Hebrew RTL page and the
   English LTR page under /en/ share every rule.
   ============================================================ */

@font-face{
  font-family:'Fredoka';
  src:url('fonts/Fredoka.ttf') format('truetype-variations');
  font-weight:300 700; font-display:swap;
}
@font-face{
  font-family:'Assistant';
  src:url('fonts/assistant-hebrew.woff2') format('woff2');
  font-weight:200 800; font-display:swap;
  unicode-range:U+0590-05FF,U+FB1D-FB4F,U+200F,U+200E;
}
@font-face{
  font-family:'Assistant';
  src:url('fonts/assistant-latin.woff2') format('woff2');
  font-weight:200 800; font-display:swap;
}

:root{
  --paper:#FAF9F5;
  --paper2:#F0EEE6;
  --paper3:#E8E6DC;
  --pad-bg:#FCFAF1;
  --line:#D1CFC5;
  --hairline:#DEDCD2;
  --ink:#141413;
  --ink-soft:#3D3D3A;
  --muted:#5E5D59;
  --clay:#D97757;
  --clay-deep:#C6613F;
  --sage:#5F9E88;
  --sage-deep:#45806B;
  --sage-mist:#E9F0EA;
  --kraft:#D4A27F;
  --manilla:#EBDBBC;
  --serif:'Fredoka','Assistant',sans-serif;
  --sans:'Assistant','Arial Hebrew','Segoe UI',sans-serif;
  --mono:ui-monospace,'SF Mono',Menlo,Consolas,monospace;
  --ease:cubic-bezier(.22,1,.36,1);
  --spring:cubic-bezier(.3,1.25,.5,1);
  --gutter:clamp(1.25rem,5vw,4rem);
  --wob-a:1.1rem 1.5rem 1.15rem 1.6rem / 1.55rem 1.15rem 1.6rem 1.1rem;
  --wob-b:1.5rem 1.1rem 1.6rem 1.15rem / 1.1rem 1.6rem 1.15rem 1.55rem;
  /* the CRT bezel follows whatever palette the workbook is wearing */
  --bezel:#0B0F0B;
  --bezel-edge:#1D2B1F;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none !important}
html{overflow-x:clip}
@media (prefers-reduced-motion: no-preference){ html{scroll-behavior:smooth} }

body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:1.0625rem;
  line-height:1.65;
  overflow-x:clip;
  -webkit-font-smoothing:antialiased;
}
body::after{
  content:"";position:fixed;inset:0;z-index:90;pointer-events:none;
  opacity:.045;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='240' height='240' filter='url(%23n)'/%3E%3C/svg%3E");
}
::selection{background:var(--manilla);color:var(--ink)}
a{color:var(--clay-deep);text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:4px}
a:hover{color:var(--ink)}
:focus-visible{outline:2.5px solid var(--clay);outline-offset:3px;border-radius:4px}
img{max-inline-size:100%;height:auto}

.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;inset-block-start:.6rem;inset-inline-start:.6rem;z-index:200;background:var(--ink);color:var(--paper);padding:.5rem 1rem;border-radius:8px;transform:translateY(-300%)}
.skip:focus{transform:none;color:var(--paper)}
.wrap{max-inline-size:1160px;margin-inline:auto;padding-inline:var(--gutter)}
.wrap-narrow{max-inline-size:680px;margin-inline:auto;padding-inline:var(--gutter)}

/* ————— wordmark ————— */
.hopala-wm{
  font-family:'Fredoka',sans-serif; font-weight:540; letter-spacing:-.012em;
  color:#141413; direction:ltr; line-height:1.32;
  display:inline-block; text-decoration:none;
}
.hopala-wm .o{ position:relative; top:-.26em; display:inline-block; color:#5F9E88; }
@keyframes hopala-hop{
  0%,46%,100%{ transform:translateY(0); }
  58%{ transform:translateY(-.11em); }
  68%{ transform:translateY(.015em); }
  76%{ transform:translateY(-.045em); }
  84%{ transform:translateY(0); }
}
.hopala-wm.animate .o{ animation:hopala-hop 3.4s ease-in-out .6s 1; }
@media (prefers-reduced-motion: reduce){ .hopala-wm.animate .o{ animation:none; } }

/* ————— header ————— */
header{
  position:sticky;inset-block-start:0;z-index:100;
  background:color-mix(in srgb,var(--paper) 88%,transparent);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  border-block-end:1px solid var(--hairline);
}
.nav-bar{
  display:flex;align-items:center;gap:1rem;
  max-inline-size:1160px;margin-inline:auto;
  padding:.7rem var(--gutter);
}
.brand{display:flex;align-items:center;gap:.6rem;flex:none;color:var(--ink);text-decoration:none}
.brand .hopala-wm{font-size:1.5rem}
.brand .desc{font-size:.83rem;color:var(--muted);font-weight:600;padding-inline-start:.55rem;border-inline-start:1px solid var(--hairline)}
.brand:hover .hopala-wm{color:var(--clay-deep)}
nav{display:flex;align-items:center;gap:.2rem;margin-inline-start:auto;overflow-x:auto;scrollbar-width:none}
nav::-webkit-scrollbar{display:none}
nav a{
  flex:none;text-decoration:none;color:var(--ink-soft);font-weight:600;font-size:.95rem;
  padding:.35rem .65rem;border-radius:10px 12px 10px 13px;
  transition:color .2s,background .2s;
}
nav a:hover{color:var(--ink);background:var(--paper2)}
.lang-toggle{
  flex:none;text-decoration:none;font-weight:700;font-size:.85rem;
  color:var(--ink-soft);border:1.5px solid var(--line);
  border-radius:9px 11px 9px 12px;padding:.24rem .6rem;
  transition:border-color .2s,color .2s;
}
.lang-toggle:hover{border-color:var(--ink);color:var(--ink)}
.nav-cta{
  flex:none;text-decoration:none;white-space:nowrap;
  background:var(--ink);color:var(--paper);font-weight:600;font-size:.95rem;
  padding:.42rem 1rem;
  border-radius:12px 14px 12px 15px / 14px 12px 15px 12px;
  transition:transform .3s var(--spring),background .2s;
}
.nav-cta:hover{background:var(--clay-deep);color:#fff;transform:translateY(-1px)}
@media (max-width:760px){
  .nav-bar{gap:.5rem}
  .brand .desc{display:none}
  nav a{font-size:.9rem;padding-inline:.45rem}
  .nav-cta{display:none}
}

/* ————— page head ————— */
.page-head{padding-block:clamp(2.2rem,6vh,3.4rem) clamp(1rem,2.5vh,1.6rem)}
.eyebrow{
  font-family:var(--serif);font-weight:600;font-size:.86rem;letter-spacing:.06em;
  color:var(--kraft);text-transform:uppercase;
}
.page-head h1{
  font-family:var(--serif);font-weight:600;letter-spacing:-.012em;
  font-size:clamp(2.1rem,5.4vw,3.3rem);line-height:1.1;
  margin-block-start:.35rem;
}
.page-head h1 .mach{direction:ltr;unicode-bidi:isolate}
.page-head .lead{color:var(--muted);margin-block-start:.9rem;max-inline-size:56ch;font-size:1.08rem}
.uline{position:relative;display:inline-block}
.uline svg{
  position:absolute;inset-inline-start:-2%;inset-block-end:-.1em;
  inline-size:104%;block-size:.22em;pointer-events:none;
}
.uline path{stroke:var(--clay);stroke-width:4.5;fill:none;stroke-linecap:round}

/* ————— counters ————— */
.counters{
  display:grid;gap:.7rem;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
  margin-block-start:1.5rem;list-style:none;
}
.counters li{
  background:var(--pad-bg);border:1.5px solid var(--line);
  border-radius:12px 15px 12px 16px / 15px 12px 16px 12px;
  padding:.7rem .9rem;
}
.counters .n{
  display:block;font-family:var(--serif);font-weight:600;
  font-size:1.6rem;line-height:1.1;letter-spacing:-.02em;
  direction:ltr;unicode-bidi:isolate;
}
.counters li:nth-child(2) .n,.counters li:nth-child(3) .n{color:var(--clay-deep)}
.counters li:nth-child(4) .n{color:var(--sage-deep)}
.counters .k{display:block;font-size:.84rem;color:var(--muted);font-weight:600;margin-block-start:.15rem}

/* ————— the machine ————— */
.machine{padding-block:clamp(1.4rem,4vh,2.2rem)}

.console{
  background:var(--bezel);
  border:1.5px solid var(--bezel-edge);
  border-radius:var(--wob-a);
  box-shadow:6px 8px 0 rgba(20,20,19,.11);
  padding:.55rem;
  transition:background .5s ease,border-color .5s ease;
  direction:ltr;
}
.console.sheet-mode{
  background:var(--paper2);
  border-color:var(--line);
}

/* toolbar sits on paper above the bezel */
.toolbar{
  display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;
  margin-block-end:.9rem;
}
.toolbar .spacer{flex:1 1 auto}
.tool{
  font:inherit;font-size:.9rem;font-weight:600;cursor:pointer;
  background:var(--pad-bg);color:var(--ink);
  border:1.5px solid var(--line);
  border-radius:10px 13px 10px 14px / 13px 10px 14px 10px;
  padding:.36rem .8rem;
  transition:border-color .2s,background .2s,transform .3s var(--spring),color .2s;
}
.tool:hover:not(:disabled){border-color:var(--ink);transform:translateY(-1px)}
.tool:disabled{opacity:.42;cursor:not-allowed}
.tool[aria-pressed="true"]{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.tool.primary{
  background:var(--ink);color:var(--paper);border-color:var(--ink);
  font-size:.98rem;padding:.46rem 1.05rem;
  box-shadow:3px 4px 0 rgba(20,20,19,.13);
}
.tool.primary:hover{background:var(--clay-deep);border-color:var(--clay-deep);color:#fff}
.tool.primary[aria-pressed="true"]{
  background:var(--sage-deep);border-color:var(--sage-deep);color:#fff;
}
.toolgroup{
  display:flex;align-items:center;gap:.3rem;
  border:1.5px solid var(--line);border-radius:11px 13px 11px 14px;
  padding:.16rem .25rem;background:var(--pad-bg);
}
.toolgroup .lbl{font-size:.8rem;color:var(--muted);font-weight:600;padding-inline:.4rem}
.toolgroup .tool{border:none;background:none;padding:.22rem .55rem;border-radius:8px 10px 8px 11px}
.toolgroup .tool:hover:not(:disabled){background:var(--paper3);transform:none}
.toolgroup .tool[aria-pressed="true"]{background:var(--ink);color:var(--paper)}

/* ————— formula bar ————— */
.fbar{
  display:none;
  background:var(--pad-bg);
  border:1.5px solid var(--line);
  border-radius:10px 12px 10px 13px;
  margin-block-end:.55rem;
  font-family:var(--mono);font-size:.82rem;
  direction:ltr;text-align:left;
}
.console.sheet-mode .fbar,
.console.has-sel .fbar{display:block}
.fbar .row1{display:flex;align-items:stretch;gap:0;border-block-end:1px solid var(--hairline)}
.fbar .namebox{
  flex:none;inline-size:9.6rem;font-size:.78rem;padding:.46rem .6rem;
  border-inline-end:1px solid var(--hairline);
  font-weight:700;color:var(--ink);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.fbar .fx{
  flex:none;padding:.42rem .55rem;color:var(--muted);
  border-inline-end:1px solid var(--hairline);
  font-style:italic;font-family:var(--serif);
}
.fbar .formula{
  flex:1 1 auto;padding:.42rem .6rem;color:var(--ink-soft);
  overflow-x:auto;white-space:pre;scrollbar-width:thin;
}
.fbar .row2{
  display:flex;flex-wrap:wrap;gap:.3rem 1.1rem;padding:.35rem .6rem;
  color:var(--muted);font-size:.78rem;align-items:center;
}
/* the bar itself is a spreadsheet artefact and stays LTR, but the Hebrew
   labels inside it need their own direction or the punctuation walks */
html[dir="rtl"] .fbar .row2{direction:rtl;font-family:var(--sans)}
html[dir="rtl"] .fbar .row2 bdi{font-family:var(--mono)}
.fbar .row2 b{color:var(--ink);font-weight:700}
.fbar .swatch{
  display:inline-block;inline-size:1.5rem;block-size:.95rem;
  border:1px solid rgba(20,20,19,.35);border-radius:2px;
  vertical-align:-.15rem;margin-inline-end:.3rem;
  font-size:.7rem;text-align:center;line-height:.95rem;
}

/* ————— the screen ————— */
.screen-scroll{
  overflow-x:auto;overflow-y:hidden;
  -webkit-overflow-scrolling:touch;
  line-height:0;
  scrollbar-width:thin;
}
#screen{
  display:block;
  cursor:crosshair;
  touch-action:pan-x pan-y;
}
.console.sheet-mode #screen{cursor:cell}
#screen:focus-visible{outline:3px solid var(--clay);outline-offset:2px}

/* ————— loading ————— */
.loading{
  display:flex;flex-direction:column;justify-content:center;align-items:center;
  gap:.8rem;min-block-size:min(58vw,420px);
  color:#7FE39B;font-family:var(--mono);font-size:.85rem;
  text-align:center;padding:1.5rem;
}
.console.sheet-mode .loading{color:var(--muted)}
html[dir="rtl"] .loading{direction:rtl}
.loading .bar{
  inline-size:min(320px,70%);block-size:10px;
  border:1px solid currentColor;padding:1px;
}
.loading .bar i{display:block;block-size:100%;background:currentColor;inline-size:0;transition:inline-size .2s linear}
.loading .err{color:#FF8A7A;max-inline-size:44ch;line-height:1.5}

/* ————— command line ————— */
.cmdline{margin-block-start:.9rem}
.cmdform{display:flex;gap:.5rem;align-items:stretch}
.prompt{
  display:flex;align-items:center;flex:1 1 auto;
  background:var(--pad-bg);border:1.5px solid var(--line);
  border-radius:11px 14px 11px 15px / 14px 11px 15px 11px;
  padding-inline-start:.7rem;
  transition:border-color .2s;
  direction:ltr;
}
.prompt:focus-within{border-color:var(--ink)}
.prompt .sigil{
  font-family:var(--mono);font-weight:700;color:var(--sage-deep);
  flex:none;font-size:.95rem;user-select:none;
}
.prompt input{
  flex:1 1 auto;font:inherit;font-family:var(--mono);font-size:.95rem;
  border:none;background:none;padding:.55rem .6rem;color:var(--ink);
  min-inline-size:0;
}
.prompt input:focus{outline:none}
.chips{display:flex;flex-wrap:wrap;gap:.4rem;margin-block-start:.6rem}
.chip{
  font:inherit;font-size:.82rem;font-weight:600;cursor:pointer;
  font-family:var(--mono);
  background:none;color:var(--ink-soft);
  border:1.5px solid var(--hairline);
  border-radius:8px 10px 8px 11px;
  padding:.16rem .55rem;
  transition:border-color .2s,color .2s,background .2s;
  direction:ltr;
}
.chip:hover{border-color:var(--clay);color:var(--clay-deep);background:var(--pad-bg)}
.hint{
  margin-block-start:.7rem;color:var(--muted);font-size:.88rem;
  max-inline-size:70ch;
}
.hint code{
  font-family:var(--mono);font-size:.86em;background:var(--paper2);
  padding:.08em .35em;border-radius:5px;
  direction:ltr;unicode-bidi:isolate;display:inline-block;
}

/* ————— prose ————— */
.prose{padding-block:clamp(1.8rem,5vh,3rem) 0}
.prose h2{
  font-family:var(--serif);font-weight:600;letter-spacing:-.012em;
  font-size:clamp(1.45rem,3.2vw,1.95rem);line-height:1.25;
  margin-block:2.2rem .7rem;
}
.prose h2:first-child{margin-block-start:0}
.prose h3{
  font-family:var(--serif);font-weight:600;letter-spacing:-.012em;
  font-size:clamp(1.1rem,2.4vw,1.28rem);line-height:1.35;
  margin-block:1.5rem .4rem;
}
.prose p{margin-block-end:1.05rem;color:var(--ink-soft)}
.prose strong{color:var(--ink);font-weight:700}
.prose ul{margin-block-end:1.15rem;padding-inline-start:1.4rem}
.prose li{margin-block-end:.42rem;color:var(--ink-soft)}
.prose li::marker{color:var(--clay)}
.prose code{
  font-family:var(--mono);font-size:.86em;background:var(--paper2);
  padding:.1em .38em;border-radius:5px;
  direction:ltr;unicode-bidi:isolate;display:inline-block;
}
.prose pre{
  margin-block:1.2rem;padding:.9rem 1.05rem;
  background:var(--paper2);border:1.5px solid var(--hairline);
  border-radius:var(--wob-a);
  overflow-x:auto;direction:ltr;text-align:left;
}
.prose pre code{background:none;padding:0;font-size:.82rem;line-height:1.55;display:block}
.marker{
  background:linear-gradient(transparent 58%,var(--manilla) 58%,var(--manilla) 94%,transparent 94%);
  padding-inline:.08em;
}

/* ————— downloads ————— */
.take{
  display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  margin-block:2.2rem 0;
}
.take a{
  display:block;text-decoration:none;color:var(--ink);
  padding:1.1rem 1.25rem;
  background:var(--pad-bg);border:1.5px solid var(--line);
  border-radius:var(--wob-a);
  transition:border-color .3s,transform .35s var(--spring),box-shadow .3s;
}
.take a:hover{border-color:var(--ink);transform:translateY(-3px);box-shadow:4px 6px 0 rgba(20,20,19,.09)}
.take .k{display:block;font-size:.82rem;font-weight:700;color:var(--kraft);letter-spacing:.04em;text-transform:uppercase}
.take .t{display:block;font-family:var(--serif);font-weight:600;font-size:1.12rem;line-height:1.3;margin-block:.2rem .25rem}
.take .d{display:block;font-size:.9rem;color:var(--muted);line-height:1.5}
.take .xlsx{background:var(--sage-mist);border-color:var(--sage)}
.take .xlsx .k{color:var(--sage-deep)}

/* ————— footer ————— */
footer{
  margin-block-start:clamp(2.4rem,6vh,3.6rem);
  border-block-start:1px solid var(--line);
  padding:2.4rem var(--gutter) 2.8rem;
  text-align:center;color:var(--muted);font-size:.93rem;
}
footer .foot-duo{display:inline-flex;align-items:center;gap:.55rem;margin-block-end:.8rem}
footer .foot-duo svg{inline-size:20px;block-size:20px;display:block;overflow:visible}
footer p{max-inline-size:64ch;margin-inline:auto}
footer .foot-nav{margin-block-start:.8rem;display:flex;gap:1.2rem;justify-content:center;flex-wrap:wrap}
footer a{color:var(--clay-deep)}
footer .tiny{margin-block-start:1rem;font-size:.83rem;color:#8C8B84}

@media (max-width:640px){
  .toolbar{gap:.4rem}
  .tool{font-size:.85rem;padding:.32rem .65rem}
  .tool.primary{font-size:.92rem;padding:.42rem .85rem}
  .fbar{font-size:.75rem}
  .fbar .namebox{inline-size:5rem}
}