/* יד ימין: כיוון "פתק". נייר, דיו, עט כחול, מרקר צהוב ושוליים אדומים. מאפיינים לוגיים כדי שעברית ואנגלית יעבדו בלי שבירות. */
:root {
  color-scheme: light dark;
  --paper: #EEF0F4; --sheet: #FBFBFD; --fg: #14161C; --muted: #4A5164; --pen: #2037D6; --marker: #FFE24A;
  --rule: #C9CEDA; --margin: #E34B4B; --margin-text: #C42B2B; --on-fg: #FFFFFF; --soft: #E2E6EE; --ring: #2037D6;
  --head: Alef, Heebo, Arial, sans-serif; --body: Assistant, Heebo, Arial, sans-serif;
  --hand: "Gveret Levin", Caveat, Alef, cursive;
  --ease: cubic-bezier(.16, 1, .3, 1);
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --paper: #14161C; --sheet: #1D2029; --fg: #ECEEF3; --muted: #A9B0C2; --pen: #93A4FF; --rule: #343848; --margin: #FF7A7A; --margin-text: #FF7A7A; --on-fg: #14161C; --soft: #262A36; --ring: #93A4FF;
} }
:root[data-theme="dark"] { --paper: #14161C; --sheet: #1D2029; --fg: #ECEEF3; --muted: #A9B0C2; --pen: #93A4FF; --rule: #343848; --margin: #FF7A7A; --margin-text: #FF7A7A; --on-fg: #14161C; --soft: #262A36; --ring: #93A4FF; }
* { box-sizing: border-box; }
html { scroll-padding-block-start: 90px; }
body { margin: 0; background: var(--paper); color: var(--fg); font-family: var(--body); font-size: 18px; line-height: 1.65; padding-block-start: env(safe-area-inset-top, 0px); padding-block-end: env(safe-area-inset-bottom, 0px); }
a { color: var(--pen); }
h1, h2, h3 { font-family: var(--head); line-height: 1.15; margin: 0 0 .5em; font-weight: 700; }
h1 { font-size: clamp(32px, 5.4vw, 60px); }
h2 { font-size: clamp(22px, 3vw, 28px); }
h3 { font-size: 20px; }
p { margin: 0 0 1em; }
:focus-visible { outline: 3px solid var(--pen); outline-offset: 3px; border-radius: 3px; }
.skip { position: absolute; inset-inline-start: 8px; inset-block-start: -60px; background: var(--fg); color: var(--paper); padding: 10px 16px; border-radius: 3px; z-index: 100; }
.skip:focus { inset-block-start: 8px; }
.hl { background: linear-gradient(transparent 52%, var(--marker) 52%, var(--marker) 92%, transparent 92%); color: var(--fg); padding-inline: 4px; }
:root[data-theme="dark"] .hl, :root:not([data-theme="light"]) .hl { }
.hand { font-family: var(--hand); }

/* header */
.top { position: sticky; inset-block-start: 0; z-index: 20; background: var(--paper); border-block-end: 2px solid var(--fg); padding-block-start: env(safe-area-inset-top, 0px); }
.top-in { max-inline-size: 1160px; margin-inline: auto; padding: 8px 20px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--fg); font-family: var(--head); font-weight: 700; font-size: 22px; }
.brand svg { inline-size: 36px; block-size: 36px; flex: none; }
.brand .wm { direction: ltr; unicode-bidi: isolate; } .brand .wm em { font-style: normal; color: var(--pen); }
.nav { display: flex; gap: 2px; margin-inline-start: 10px; flex-wrap: wrap; }
.nav a { padding: 8px 12px; text-decoration: none; color: var(--muted); font-weight: 600; min-block-size: 44px; display: inline-flex; align-items: center; border-block-end: 3px solid transparent; }
.nav a[aria-current="page"] { color: var(--fg); border-block-end-color: var(--marker); }
.tools { margin-inline-start: auto; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.btn { font: inherit; font-weight: 700; cursor: pointer; border: 2px solid var(--fg); background: transparent; color: var(--fg); padding: 9px 14px; border-radius: 3px; min-block-size: 44px; min-inline-size: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; text-decoration: none; transition: background .15s, color .15s; touch-action: manipulation; }
.btn:hover { background: var(--soft); }
.btn.primary { background: var(--fg); color: var(--on-fg); }
.btn.primary:hover { background: var(--pen); border-color: var(--pen); color: #fff; }
.btn[aria-pressed="true"]:not(.primary) { background: var(--marker); color: #14161C; border-color: #14161C; }
.seg { display: inline-flex; border: 2px solid var(--fg); border-radius: 3px; overflow: hidden; }
.seg button { font: inherit; font-weight: 700; border: 0; background: transparent; color: var(--fg); padding: 8px 12px; cursor: pointer; min-block-size: 44px; }
.seg button[aria-pressed="true"] { background: var(--fg); color: var(--on-fg); }
kbd { font-family: inherit; font-size: 12px; border: 1px solid var(--rule); border-radius: 3px; padding: 1px 6px; background: var(--sheet); direction: ltr; unicode-bidi: isolate; }
.ring { inline-size: 44px; block-size: 44px; position: relative; }
.ring svg { inline-size: 44px; block-size: 44px; transform: rotate(-90deg); }
.ring span { position: absolute; inset: 0; display: grid; place-items: center; font-size: 11px; font-weight: 700; }

main { max-inline-size: 1160px; margin-inline: auto; padding: 32px 20px 72px; min-block-size: 70vh; overflow-wrap: anywhere; }
.crumbs { font-size: 15px; color: var(--muted); margin-block-end: 14px; }
.crumbs a { color: var(--muted); }

/* home */
.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); gap: 44px; align-items: center; padding-block: 18px 40px; }
.hero h1 { margin-block-end: 18px; }
.hero .lead { font-size: 21px; max-inline-size: 32ch; margin-block-end: 26px; }
.nb { white-space: nowrap; }
.sheet { position: relative; background: var(--sheet); transform: rotate(-1.2deg); box-shadow: 0 1px 0 var(--rule), 6px 8px 0 -2px rgba(20,22,28,.10); padding: 24px 24px 22px 20px; padding-inline-start: 66px;
  background-image: repeating-linear-gradient(to bottom, transparent 0 41px, var(--rule) 41px 42px); background-position: 0 68px; font-family: var(--hand); }
.sheet::before { content: ""; position: absolute; inset-block: 0; inset-inline-start: 48px; inline-size: 2px; background: var(--margin); opacity: .75; }
.sheet-h { font-size: 50px; line-height: 1; color: var(--pen); margin-block-end: 2px; }
.sheet-h span { background: linear-gradient(transparent 58%, var(--marker) 58%, var(--marker) 92%, transparent 92%); padding-inline: 6px; }
.sheet-s { font-size: 19px; color: var(--muted); margin-block-end: 18px; }
.todo { list-style: none; padding: 0; margin: 0; }
.todo li { display: flex; align-items: baseline; gap: 14px; min-block-size: 42px; line-height: 42px; font-size: 23px; }
.todo a { color: inherit; text-decoration: none; display: contents; }
.todo .t { white-space: normal; }
.todo .gone .m { color: #14161C; text-decoration: line-through; text-decoration-color: #2037D6; text-decoration-thickness: 2px; background: linear-gradient(transparent 14%, var(--marker) 14%, var(--marker) 96%, transparent 96%); -webkit-box-decoration-break: clone; box-decoration-break: clone; padding-inline: 4px; }
.todo .n { margin-inline-start: auto; color: var(--pen); font-size: 19px; white-space: nowrap; transform: rotate(-2deg); }
.todo .keep { color: var(--margin-text); border: 2px solid var(--margin-text); border-radius: 50% / 60%; padding: 0 14px; line-height: 30px; transform: rotate(1.5deg); }
.todo li:not(.gone) .t { color: var(--fg); }

.ladder-h { margin-block: 14px 4px; }
.ladder-sub { color: var(--muted); margin-block-end: 18px; }
.dayline { font-family: var(--hand); font-size: 26px; color: var(--pen); margin-block: 22px 4px; }
.ladder { list-style: none; margin: 0; padding: 0; border-block-start: 2px solid var(--fg); }
.ladder li { border-block-end: 1px solid var(--rule); }
.ladder a { display: grid; grid-template-columns: 56px 1fr auto; gap: 18px; align-items: center; padding: 16px 6px; text-decoration: none; color: var(--fg); transition: background .15s; }
.ladder a:hover { background: var(--soft); }
.ladder .no { font-family: var(--head); font-weight: 700; font-size: 40px; line-height: 1; color: var(--pen); }
.ladder b { font-family: var(--head); font-size: 22px; display: block; }
.ladder .out { color: var(--muted); font-size: 16px; line-height: 1.45; display: block; max-inline-size: 60ch; }
.ladder .side { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; font-size: 14px; color: var(--muted); }
.ladder .current .no { background: var(--marker); color: #14161C; padding-inline: 10px; justify-self: start; }
.ticks { display: flex; gap: 4px; }
.tk { inline-size: 14px; block-size: 14px; border: 2px solid var(--pen); border-radius: 2px; }
.tk.on { background: var(--pen); }

/* lists / lessons */
.card { background: var(--sheet); border: 1px solid var(--rule); border-radius: 2px; padding: 22px; box-shadow: 4px 6px 0 -2px rgba(20,22,28,.08); margin-block-end: 18px; }
.lessons { list-style: none; padding: 0; margin: 0; border-block-start: 2px solid var(--fg); }
.lesson-row { display: flex; align-items: center; gap: 14px; padding: 14px 6px; text-decoration: none; color: var(--fg); min-block-size: 64px; border-block-end: 1px solid var(--rule); }
.lesson-row:hover { background: var(--soft); }
.lesson-row .id { font-family: var(--head); font-weight: 700; color: var(--pen); min-inline-size: 40px; direction: ltr; unicode-bidi: isolate; font-size: 20px; }
.lesson-row .title { flex: 1; font-weight: 600; }
.check { inline-size: 28px; block-size: 28px; border-radius: 50%; border: 2px solid var(--pen); display: grid; place-items: center; flex: none; font-weight: 700; }
.check.on { background: var(--pen); color: #fff; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; margin-block: 8px 18px; }
.chip { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 700; padding: 2px 10px; border: 1px solid var(--rule); border-radius: 2px; background: var(--sheet); color: var(--muted); }
.chip.plan { background: var(--marker); color: #14161C; border-color: transparent; }

/* lesson page */
.video { aspect-ratio: 16 / 9; background: var(--sheet); border: 2px dashed var(--fg); display: grid; place-items: center; text-align: center; color: var(--muted); padding: 20px; font-family: var(--hand); font-size: 26px; }
.video-wrap { aspect-ratio: 16 / 9; overflow: hidden; border: 2px solid var(--fg); }
.video-wrap iframe { inline-size: 100%; block-size: 100%; border: 0; }
.tabs { display: flex; gap: 8px; margin-block: 16px; }
.section { margin-block: 30px; }
.section h2 { padding-block-end: 6px; border-block-end: 1px solid var(--rule); }
.steps { padding-inline-start: 26px; }
.steps li { margin-block-end: 10px; padding-inline-start: 4px; }
.steps li::marker { color: var(--pen); font-weight: 700; }
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.briefbox { position: relative; background: var(--sheet); border: 1px solid var(--rule); box-shadow: 4px 6px 0 -2px rgba(20,22,28,.08); padding: 14px 18px; padding-inline-start: 56px; white-space: pre-wrap; font-size: 17px; line-height: 28px;
  background-image: repeating-linear-gradient(to bottom, transparent 0 27px, var(--rule) 27px 28px); background-position: 0 14px; }
.briefbox::before { content: ""; position: absolute; inset-block: 0; inset-inline-start: 38px; inline-size: 2px; background: var(--margin); opacity: .7; }
.files { display: flex; flex-wrap: wrap; gap: 8px; }
.file { font-family: Consolas, Menlo, monospace; font-size: 14px; direction: ltr; unicode-bidi: isolate; background: var(--sheet); border: 1px solid var(--rule); border-radius: 2px; padding: 6px 10px; }
.draft { background: var(--marker); color: #14161C; padding: 14px 18px; border-inline-start: 6px solid #14161C; font-weight: 600; }
.pager { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-block-start: 30px; }
body[data-os="mac"] [data-os="win"], body[data-os="win"] [data-os="mac"] { display: none; }

/* quiz + cert */
.opt { display: block; inline-size: 100%; text-align: start; font: inherit; background: var(--sheet); border: 1px solid var(--muted); border-radius: 2px; padding: 14px 16px; margin-block-end: 10px; cursor: pointer; min-block-size: 52px; color: var(--fg); }
.opt:hover { background: var(--soft); }
.opt[aria-pressed="true"] { border: 2px solid var(--pen); font-weight: 700; }
.card h2:focus, main:focus { outline: none; }
.opt.right { background: var(--marker); color: #14161C; border-color: #14161C; font-weight: 700; }
.opt.wrong { border: 2px solid var(--margin); border-radius: 22px / 50%; }
.cert { background: var(--sheet); color: var(--fg); border: 3px solid var(--fg); outline: 1px solid var(--pen); outline-offset: -12px; padding: 56px 30px; text-align: center; max-inline-size: 840px; margin-inline: auto; }
.cert h1 { margin-block-end: 6px; }
.cert .who { font-family: var(--hand); font-size: clamp(34px, 6vw, 54px); color: var(--pen); margin-block: 16px; display: inline-block; padding-inline: 28px; min-inline-size: 60%; background: linear-gradient(transparent 62%, var(--marker) 62%, var(--marker) 92%, transparent 92%); }
.field { font: inherit; padding: 12px 14px; border-radius: 3px; border: 2px solid var(--fg); background: var(--sheet); color: var(--fg); min-block-size: 48px; inline-size: min(100%, 360px); }

/* search */
.overlay { position: fixed; inset: 0; background: rgba(20,22,28,.6); z-index: 50; display: none; align-items: flex-start; justify-content: center; padding: 12vh 16px 16px; }
.overlay.open { display: flex; }
.palette { background: var(--sheet); border: 2px solid var(--fg); inline-size: min(640px, 100%); overflow: hidden; max-block-size: 70vh; display: flex; flex-direction: column; box-shadow: 8px 10px 0 -2px rgba(20,22,28,.25); }
.palette input { font: inherit; border: 0; border-block-end: 1px solid var(--rule); padding: 16px 18px; background: transparent; color: var(--fg); outline: none; font-size: 19px; }
.palette ul { list-style: none; margin: 0; padding: 6px; overflow: auto; }
.palette li a { display: flex; gap: 12px; padding: 12px; text-decoration: none; color: var(--fg); min-block-size: 48px; align-items: center; }
.palette li a:hover, .palette li a.sel { background: var(--marker); color: #14161C; }
.toast { position: fixed; inset-inline: 0; inset-block-end: 24px; margin-inline: auto; inline-size: max-content; max-inline-size: 90vw; background: var(--fg); color: var(--paper); padding: 10px 18px; border-radius: 3px; font-weight: 700; opacity: 0; pointer-events: none; transition: opacity .2s; z-index: 60; }
.toast.show { opacity: 1; }
footer { text-align: center; color: var(--muted); font-size: 14px; padding: 24px 16px 40px; }

@media (max-width: 860px) { .hero { grid-template-columns: 1fr; gap: 28px; } }
@media (max-width: 600px) {
  body { font-size: 17px; }
  .tools .btn span, .tools kbd, .ring { display: none; } .tools { gap: 6px; } .top-in { padding: 6px 14px; gap: 6px; } .seg button { padding: 6px 9px; min-block-size: 44px; } .tools .btn { padding: 6px 10px; }
  .top { position: static; } .nav { order: 3; inline-size: 100%; margin: 0; }
  .sheet { transform: rotate(-.7deg); padding-inline-end: 12px; }
  .todo li { flex-wrap: wrap; font-size: 19px; line-height: 34px; } .todo .n { font-size: 16px; }
  .ladder a { grid-template-columns: 40px 1fr; } .ladder .no { font-size: 30px; } .ladder .side { grid-column: 2; flex-direction: row; justify-content: space-between; align-items: center; inline-size: 100%; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }
@media print {
  body * { visibility: hidden; }
  .cert, .cert * { visibility: visible; }
  .cert { position: absolute; inset: 0; margin: 0; max-inline-size: none; }
  @page { size: A4 landscape; margin: 10mm; }
}

html[lang="en"] .todo li { font-size: 21px; } html[lang="en"] .todo .n { font-size: 17px; }