@charset "utf-8";
/* ==========================================================================
   Danish-Persian Lessons — landing stylesheet
   Implements docs/design/ART-DIRECTION.md: «دفتر مشق» / the exercise notebook.
   Mobile-first (base ≈360px), enhanced at 640 / 768 / 1024px only.
   Shared by /index.html, /da/index.html and /fa/index.html.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Tokens
   -------------------------------------------------------------------------- */
:root {
  --paper: #F7F2E9;
  --ink:   #26211B;
  --red:   #941520;
  --blue:  #174488;
  --rule:  #C7D3E2;
  --card:  #EFE8DA;

  --font-latin: "Andika", "Segoe UI", system-ui, sans-serif;
  --font-fa:    "Vazirmatn", "Noto Naskh Arabic", system-ui, sans-serif;
  --font-naskh: "Noto Naskh Arabic", "Vazirmatn", serif;

  /* the notebook grid */
  --sheet-max: 46rem;
  --gutter: 1.15rem;
  --madde-cut: 0.54em; /* tuned against Noto Naskh Arabic at line-height 2 */
}

@media (prefers-color-scheme: dark) {
  :root { /* "chalkboard" */
    --paper: #161D1A;
    --ink:   #E9E5DB;
    --red:   #FF8F87;
    --blue:  #8FB3EA;
    --rule:  #3E5248;
    --card:  #1D2622;
  }
}

/* --------------------------------------------------------------------------
   1a. Self-hosted fonts — same files the app uses (see public/fonts/OFL.txt).
   No runtime Google Fonts requests. Paths are relative to this stylesheet's
   own location (the site root), so they resolve the same from /, /da/ and
   /fa/ alike.
   -------------------------------------------------------------------------- */
@font-face {
  font-family: "Andika";
  src: url("fonts/Andika-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Andika";
  src: url("fonts/Andika-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Vazirmatn";
  src: url("fonts/Vazirmatn-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Vazirmatn";
  src: url("fonts/Vazirmatn-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Noto Naskh Arabic";
  src: url("fonts/NotoNaskhArabic-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* --------------------------------------------------------------------------
   2. Reset / base
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-latin);
  font-size: 1rem;         /* 16px floor */
  line-height: 1.65;
  overflow-wrap: break-word;
  text-rendering: optimizeLegibility;
}

[dir="rtl"] body,
body[dir="rtl"] {
  font-family: var(--font-fa);
  font-size: 1.125rem;     /* Persian body floor */
  line-height: 1.9;
}

img, svg { max-width: 100%; height: auto; }

h1, h2, h3 { line-height: 1.25; text-wrap: balance; margin: 0 0 0.5em; font-weight: 700; }
h1 { font-size: clamp(1.6rem, 6.5vw, 2.35rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(1.3rem, 5vw, 1.7rem); }
h3 { font-size: 1.075rem; }

[dir="rtl"] h1,
[dir="rtl"] h2,
[dir="rtl"] h3 { letter-spacing: normal; }

p { margin: 0 0 1rem; }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0; padding: 0; list-style: none; }

a { color: var(--blue); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
  border-radius: 2px;
}

::selection { background: var(--red); color: var(--paper); }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden; clip-path: inset(50%);
  white-space: nowrap;
}

/* --------------------------------------------------------------------------
   3. The sheet — one red margin line, ruled sections
   The margin line sits inline-start: LEFT on LTR, RIGHT on RTL, for free.
   -------------------------------------------------------------------------- */
.sheet {
  max-width: var(--sheet-max);
  margin-inline: auto;
  border-inline-start: 2px solid var(--red);
  padding-inline: var(--gutter) var(--gutter);
  padding-block: 1.5rem 2.5rem;
}

.sheet > * + * { border-block-start: 1px solid var(--rule); }

main > section + section { border-block-start: 1px solid var(--rule); }

section { padding-block: 2rem; }
main > section:first-child { padding-block-start: 1.25rem; }

.lede {
  font-size: 1.075rem;
  max-width: 34ch;
}
[dir="rtl"] .lede { font-size: 1.2rem; max-width: 36ch; }

.note { color: var(--ink); opacity: 0.78; font-size: 0.95rem; }
[dir="rtl"] .note { font-size: 1rem; }

/* --------------------------------------------------------------------------
   4. Header + language switcher
   -------------------------------------------------------------------------- */
.masthead {
  padding-block-end: 1.25rem;
}

.wordmark {
  font-size: 0.8rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  margin: 0 0 0.75rem;
  color: var(--ink);
  opacity: 0.65;
}
[dir="rtl"] .wordmark { letter-spacing: normal; text-transform: none; font-size: 0.9rem; }

.langs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.5rem;
  align-items: center;
}

.langs li { display: flex; }

.langs a,
.langs span {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding-inline: 0.7rem;
  border: 1px solid var(--rule);
  border-radius: 3px;
  font-size: 0.95rem;
  text-decoration: none;
}

.langs a { color: var(--blue); }
.langs a:hover { border-color: var(--blue); }

.langs .is-current {
  color: var(--ink);
  border-color: var(--red);
  border-inline-start-width: 3px;
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   5. Hero — the split-screen specimen
   -------------------------------------------------------------------------- */
.specimen {
  margin: 0 0 1.5rem;
  padding-block: 0.5rem 0;
  text-align: center;
}

.specimen__fa {
  font-family: var(--font-naskh);
  font-weight: 700;
  font-size: clamp(4.5rem, 20vw, 9rem);
  line-height: 2;          /* diacritics need air — and --madde-cut depends on it */
  direction: rtl;
  color: var(--ink);
  /* line-height 2 leaves more descender air than the specimen needs; the
     negative margin trims the gap without moving the gradient's origin */
  margin: 0 0 -0.22em;
}

/* The madde stroke in the teacher's red pen. The glyph is real type — the
   colour split is a clipped gradient, so no fake letterforms are introduced. */
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .specimen__fa--madde {
    background-image: linear-gradient(to bottom,
      var(--red) 0 var(--madde-cut), var(--ink) var(--madde-cut));
    background-repeat: no-repeat;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}

@media (forced-colors: active) {
  .specimen__fa--madde { background-image: none; color: CanvasText; }
}

.specimen__rule {
  border: 0;
  border-block-start: 1px solid var(--rule);
  margin: 0;
}

.specimen__da {
  font-family: var(--font-latin);
  font-size: clamp(1.5rem, 6.5vw, 2.4rem);
  line-height: 1.7;
  padding-block: 0.65rem 0.35rem;
  margin: 0;
  color: var(--ink);
}

.specimen__gloss {
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0.6;
  margin: 0;
}
[dir="rtl"] .specimen__gloss { letter-spacing: normal; text-transform: none; font-size: 0.95rem; }

/* --------------------------------------------------------------------------
   6. Vowel-mark chips — the one orchestrated moment of motion
   -------------------------------------------------------------------------- */
.marks {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: center;
  margin-block: 1.5rem 1rem;
}

.marks li {
  flex: 0 0 auto;
  min-width: 48px;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 0.15rem 0.5rem 0.35rem;
}

.marks b {
  font-family: var(--font-naskh);
  font-weight: 700;
  font-size: clamp(1.6rem, 7vw, 2.1rem);
  line-height: 1.7;
  color: var(--red);
  direction: rtl;
}

@keyframes ink-in {
  from { opacity: 0; transform: translateY(-2px); }
  to   { opacity: 1; transform: none; }
}

.marks li { animation: ink-in 420ms ease-out backwards; }
.marks li:nth-child(1) { animation-delay: 120ms; }
.marks li:nth-child(2) { animation-delay: 210ms; }
.marks li:nth-child(3) { animation-delay: 300ms; }
.marks li:nth-child(4) { animation-delay: 390ms; }
.marks li:nth-child(5) { animation-delay: 480ms; }
.marks li:nth-child(6) { animation-delay: 570ms; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .marks li { animation: none; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* --------------------------------------------------------------------------
   7. Profiles — who this is for
   -------------------------------------------------------------------------- */
.profiles { display: grid; gap: 1rem; }

.profiles li {
  background: var(--card);
  border: 1px solid var(--rule);
  border-inline-start: 3px solid var(--red);
  border-radius: 3px;
  padding: 1rem 1rem 1.1rem;
}

.profiles h3 { margin-block-end: 0.35rem; }
.profiles p { font-size: 1rem; }
[dir="rtl"] .profiles p { font-size: 1.075rem; }

/* --------------------------------------------------------------------------
   8. Steps — three ruled rows
   -------------------------------------------------------------------------- */
.steps { counter-reset: none; }

.steps li {
  display: grid;
  grid-template-columns: 2.25rem 1fr;
  gap: 0 0.85rem;
  align-items: start;
  padding-block: 1.1rem;
  border-block-start: 1px solid var(--rule);
}

/* no closing rule on the last row: the section divider already ends the block,
   and two hairlines a few rem apart read as a mistake */

.steps .num {
  grid-row: 1 / span 2;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--red);
  line-height: 1.4;
}

.steps h3 { margin: 0 0 0.25rem; align-self: center; }
.steps p { grid-column: 2; font-size: 1rem; margin: 0; }
[dir="rtl"] .steps p { font-size: 1.075rem; }

.shapes,
.inline-fa {
  font-family: var(--font-naskh);
  font-weight: 700;
  direction: rtl;
  unicode-bidi: isolate;
  font-size: 1.25em;
  line-height: 1.3;        /* keeps the surrounding line boxes even */
}

.inline-fa--red { color: var(--red); }

/* --------------------------------------------------------------------------
   9. Curriculum preview — four specimen mini-cards
   -------------------------------------------------------------------------- */
.words {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
}

.words li {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 0.4rem 0.5rem 0.7rem;
  text-align: center;
}

.words .fa {
  display: block;
  font-family: var(--font-naskh);
  font-weight: 700;
  font-size: clamp(2.4rem, 12vw, 3.25rem);
  line-height: 2;
  direction: rtl;
  color: var(--ink);
  margin: 0 0 -0.2em;
}

.words .fa--madde { /* same clipped-gradient trick, same tuned cut */
  color: var(--ink);
}

@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .words .fa--madde {
    background-image: linear-gradient(to bottom,
      var(--red) 0 var(--madde-cut), var(--ink) var(--madde-cut));
    background-repeat: no-repeat;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}

@media (forced-colors: active) {
  .words .fa--madde { background-image: none; color: CanvasText; }
}

.words hr {
  border: 0;
  border-block-start: 1px solid var(--rule);
  margin: 0;
}

.words .da {
  display: block;
  font-family: var(--font-latin);
  font-size: 1.05rem;
  line-height: 1.6;
  padding-block-start: 0.45rem;
  color: var(--ink);
  margin: 0;
}

/* --------------------------------------------------------------------------
   10. Privacy
   -------------------------------------------------------------------------- */
.facts { display: grid; gap: 0.5rem; margin-block-start: 1rem; }

.facts li {
  padding-inline-start: 1.4rem;
  position: relative;
  font-size: 1rem;
}
[dir="rtl"] .facts li { font-size: 1.075rem; }

.facts li::before {
  content: "✓";
  position: absolute;
  inset-inline-start: 0;
  color: var(--red);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   11. Status + CTA
   -------------------------------------------------------------------------- */
.status {
  background: var(--card);
  border: 1px solid var(--rule);
  border-inline-start: 3px solid var(--red);
  border-radius: 3px;
  padding: 1rem;
  margin-block-end: 1.25rem;
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.6rem 1.35rem;
  background: var(--blue);
  color: var(--paper);
  border-radius: 3px;
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
}

@media (prefers-color-scheme: dark) {
  .cta { color: #14201C; }
}

.cta:hover { background: var(--ink); }
.cta:focus-visible { outline-offset: 3px; }

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* The GitHub link is secondary once the app CTA is live. */
.cta--secondary {
  background: transparent;
  color: var(--blue);
  border: 1px solid var(--rule);
}

.cta--secondary:hover {
  background: var(--card);
  color: var(--blue);
}

.cta-note { margin-block-start: 0.85rem; }

/* --------------------------------------------------------------------------
   12. Footer
   -------------------------------------------------------------------------- */
footer {
  padding-block: 1.35rem 0;
  font-size: 0.95rem;
}
[dir="rtl"] footer { font-size: 1rem; }

footer p { margin: 0; }

/* --------------------------------------------------------------------------
   13. RTL specifics
   Logical properties do the mirroring; these are the genuinely directional
   or script-specific bits.
   -------------------------------------------------------------------------- */
[dir="rtl"] .specimen__da,
[dir="rtl"] .words .da,
[dir="rtl"] .lang-da {
  font-family: var(--font-latin);
  direction: ltr;
  unicode-bidi: isolate;
}

[dir="rtl"] .cta,
[dir="rtl"] .langs a,
[dir="rtl"] .langs span { font-family: var(--font-fa); }

[dir="rtl"] .steps .num { font-family: var(--font-fa); }

/* --------------------------------------------------------------------------
   14. Enhancements — min-width only
   -------------------------------------------------------------------------- */
@media (min-width: 640px) {
  :root { --gutter: 1.75rem; }

  .sheet { padding-block: 2.25rem 3.25rem; }
  section { padding-block: 2.5rem; }

  .profiles { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .steps li { grid-template-columns: 2.75rem 1fr; padding-block: 1.35rem; }

  .words { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0.75rem; }

  .marks { gap: 0.55rem; }
  .marks li { min-width: 60px; }
}

@media (min-width: 768px) {
  body { font-size: 1.0625rem; }
  [dir="rtl"] body { font-size: 1.175rem; }

  /* keep the measure readable once the sheet gets wide */
  main > section > p,
  .note,
  .steps p,
  .status p,
  .cta-note,
  .facts li { max-width: 66ch; }

  .marks { justify-content: flex-start; }

  .masthead {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
  }
  .wordmark { margin-block-end: 0; }

  .lede { font-size: 1.2rem; max-width: 44ch; }
  [dir="rtl"] .lede { font-size: 1.3rem; max-width: 44ch; }

  .specimen { padding-block-start: 1rem; }
}

@media (min-width: 1024px) {
  :root { --sheet-max: 52rem; --gutter: 2.5rem; }
  .sheet { padding-block: 3rem 4rem; }
  section { padding-block: 3rem; }
}