/* ------------------------------------------------------------------
   PaperX landing — shared stylesheet.

   Extracted from index.html so the English, French and Arabic pages
   cannot drift apart again. Each page now carries markup and copy only.
   Arabic additionally loads landing-rtl.css.
   ------------------------------------------------------------------ */

/* ---------------------------------------------------------------
   Design tokens. Colours mirror apps/frontend/src/environments/brand.ts
   (and apps/backend/src/utils/brand.js) so the marketing page and the
   product read as one thing.
   --------------------------------------------------------------- */
:root {
  --px-primary:       #39B592;
  --px-primary-dark:  #2F9A7C;
  --px-primary-ghost: rgba(57, 181, 146, 0.08);
  --px-primary-line:  rgba(57, 181, 146, 0.22);
  --px-amber:         #F9A01B;
  --px-blue:          #2563EB;

  --px-ink:      #1D2430;
  --px-body:     #4A5768;
  --px-dim:      #7A8A9E;

  --px-bg:       #FFFFFF;
  --px-bg-soft:  #F7FAF9;
  --px-bg-deep:  #0E1B21;
  --px-border:   #E6ECEA;

  --px-radius:    16px;
  --px-radius-sm: 10px;

  --px-shadow-sm: 0 1px 2px rgba(16,32,40,.05);
  --px-shadow:    0 4px 20px rgba(16,32,40,.07);
  --px-shadow-lg: 0 28px 70px -28px rgba(16,32,40,.35);

  --font-display: 'Montserrat', system-ui, sans-serif;
  --font-sans:    'Inter', -apple-system, system-ui, sans-serif;
  --font-mono:    ui-monospace, 'SF Mono', Menlo, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--px-body);
  background: var(--px-bg);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { font-family: var(--font-display); color: var(--px-ink); margin: 0; line-height: 1.18; letter-spacing: -.02em; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; }

.container { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.hl { color: var(--px-primary); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-sans); font-size: 15px; font-weight: 600;
  padding: 12px 22px; border-radius: 999px; border: 1px solid transparent;
  cursor: pointer; white-space: nowrap;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease, border-color .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--px-primary); color: #fff; box-shadow: 0 2px 6px rgba(57,181,146,.28); }
.btn-primary:hover { background: var(--px-primary-dark); box-shadow: 0 6px 18px rgba(57,181,146,.34); }
.btn-ghost { background: #fff; color: var(--px-ink); border-color: var(--px-border); }
.btn-ghost:hover { border-color: var(--px-primary-line); color: var(--px-primary-dark); }
.btn-light { background: rgba(255,255,255,.1); color: #fff; border-color: rgba(255,255,255,.28); }
.btn-light:hover { background: rgba(255,255,255,.18); }
.btn-sm { padding: 9px 16px; font-size: 14px; }
.btn-lg { padding: 15px 30px; font-size: 16px; }

/* ---------- wordmark ----------
   Rendered as type, not as a raster file: the legacy logo art still
   carries the old name, and a text wordmark also stays crisp at any size. */
.wordmark {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-display); font-weight: 800; font-size: 21px;
  letter-spacing: -.03em; color: var(--px-ink);
}
.wordmark .mark {
  width: 30px; height: 30px; border-radius: 9px; flex: none;
  background: linear-gradient(145deg, var(--px-primary), var(--px-primary-dark));
  display: grid; place-items: center;
  color: #fff; font-size: 17px; font-weight: 800; line-height: 1;
  box-shadow: 0 2px 6px rgba(57,181,146,.35);
}
.wordmark .accent { color: var(--px-primary); }
footer .wordmark, .nav-dark .wordmark { color: #fff; }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255,255,255,.86);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.nav.scrolled { border-bottom-color: var(--px-border); box-shadow: var(--px-shadow-sm); }
.nav-inner { display: flex; align-items: center; gap: 28px; height: 70px; }
.nav-links { display: flex; gap: 26px; margin-left: 12px; }
.nav-links a { font-size: 14.5px; font-weight: 500; color: var(--px-body); }
.nav-links a:hover { color: var(--px-primary-dark); }
.nav-cta { display: flex; align-items: center; gap: 10px; margin-left: auto; }

.lang { position: relative; }
.lang-btn {
  display: inline-flex; align-items: center; gap: 6px; background: none; border: 0;
  font: inherit; font-size: 14px; color: var(--px-body); cursor: pointer; padding: 8px 6px;
}
.lang-menu {
  position: absolute; right: 0; top: calc(100% + 6px); min-width: 156px;
  background: #fff; border: 1px solid var(--px-border); border-radius: var(--px-radius-sm);
  box-shadow: var(--px-shadow); padding: 6px; display: none;
}
.lang:hover .lang-menu, .lang:focus-within .lang-menu { display: block; }
.lang-menu a { display: block; padding: 8px 12px; font-size: 14px; border-radius: 7px; }
.lang-menu a:hover { background: var(--px-primary-ghost); }
.lang-menu a.active { color: var(--px-primary-dark); font-weight: 600; }

.nav-toggle { display: none; background: none; border: 0; font-size: 24px; color: var(--px-ink); cursor: pointer; padding: 4px; }
.mobile-menu { display: none; border-top: 1px solid var(--px-border); background: #fff; padding: 8px 24px 18px; }
.mobile-menu.open { display: block; }
.mobile-menu a { display: block; padding: 11px 0; font-size: 15px; font-weight: 500; border-bottom: 1px solid var(--px-bg-soft); }

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; padding: 76px 0 60px; }
.hero::before {
  content: ''; position: absolute; inset: -30% 0 auto -10%;
  width: 60%; height: 620px; border-radius: 50%;
  background: radial-gradient(circle, rgba(57,181,146,.13), transparent 65%);
  pointer-events: none;
}
.hero .container { position: relative; }
.hero-text { max-width: 760px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 12.5px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
  color: var(--px-primary-dark); background: var(--px-primary-ghost);
  border: 1px solid var(--px-primary-line); padding: 6px 13px; border-radius: 999px;
}
.hero h1 { font-size: clamp(34px, 5.2vw, 56px); margin: 22px 0 0; font-weight: 800; }
.hero .lede { font-size: clamp(17px, 2vw, 19.5px); margin-top: 20px; max-width: 660px; color: var(--px-body); }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-note {
  display: flex; flex-wrap: wrap; gap: 10px 26px; margin-top: 24px;
  font-size: 14.5px; color: var(--px-dim);
}
.hero-note span { display: inline-flex; align-items: center; gap: 7px; }
.hero-note iconify-icon { color: var(--px-primary); font-size: 17px; }

/* ---------- product mock ---------- */
.mock {
  margin-top: 52px; border-radius: 18px; overflow: hidden;
  border: 1px solid var(--px-border); background: #fff;
  box-shadow: var(--px-shadow-lg);
}
.mock-bar {
  display: flex; align-items: center; gap: 12px; padding: 11px 16px;
  background: #FAFCFB; border-bottom: 1px solid var(--px-border);
}
.mock-dots { display: flex; gap: 6px; }
.mock-dots i { width: 10px; height: 10px; border-radius: 50%; background: #DDE5E2; display: block; }
.mock-file {
  font-family: var(--font-mono); font-size: 12.5px; color: var(--px-dim);
  background: #fff; border: 1px solid var(--px-border); border-radius: 6px; padding: 3px 10px;
}
.mock-actions { margin-left: auto; display: flex; gap: 7px; }
.chip {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 12px; font-weight: 600; padding: 5px 11px; border-radius: 999px;
  background: #fff; border: 1px solid var(--px-border); color: var(--px-dim);
}
.chip.on { background: var(--px-primary); border-color: var(--px-primary); color: #fff; }

/* Four panes: project tree, source, compiled PDF, AI feedback. */
.mock-body { display: grid; grid-template-columns: 158px 1.05fr 1fr 232px; min-height: 372px; }
.mock-col { padding: 14px; border-right: 1px solid var(--px-border); }
.mock-col:last-child { border-right: 0; }
.mock-label {
  font-size: 10.5px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  color: var(--px-dim); margin-bottom: 11px;
}
.tree { font-size: 13px; }
.tree div { display: flex; align-items: center; gap: 7px; padding: 5px 7px; border-radius: 6px; color: var(--px-body); }
.tree div.on { background: var(--px-primary-ghost); color: var(--px-primary-dark); font-weight: 600; }
.tree iconify-icon { font-size: 15px; opacity: .7; }

.code { font-family: var(--font-mono); font-size: 12.5px; line-height: 1.95; color: #55636F; }
.code .k { color: var(--px-primary-dark); }
.code .a { color: var(--px-blue); }
.code .c { color: #A9B6C2; }
.code mark { background: rgba(249,160,27,.16); color: inherit; border-radius: 3px; padding: 1px 2px; }

.page {
  background: #fff; border: 1px solid var(--px-border); border-radius: 4px;
  box-shadow: var(--px-shadow-sm); padding: 20px 18px; height: 100%;
}
.page .t { height: 9px; border-radius: 3px; background: #DCE4E1; width: 72%; margin: 0 auto 14px; }
.page .l { height: 5px; border-radius: 3px; background: #EDF1EF; margin-bottom: 8px; }
.page .l.s { width: 55%; }
.page .l.m { width: 82%; }
.page .eq { height: 22px; border-radius: 4px; background: var(--px-primary-ghost); border: 1px dashed var(--px-primary-line); margin: 12px 0; }

.ai-card {
  border: 1px solid var(--px-border); border-left: 3px solid var(--px-primary);
  border-radius: 8px; padding: 10px 12px; margin-bottom: 9px; background: #fff;
}
.ai-card.warn { border-left-color: var(--px-amber); }
.ai-card.info { border-left-color: var(--px-blue); }
.ai-card h5 { margin: 0 0 5px; font-family: var(--font-sans); font-size: 12.5px; font-weight: 700; color: var(--px-ink); }
.ai-card p { font-size: 12px; line-height: 1.5; color: var(--px-dim); }

/* ---------- sections ---------- */
.section { padding: 84px 0; }
.section.soft { background: var(--px-bg-soft); border-block: 1px solid var(--px-border); }
.section-head { max-width: 700px; margin: 0 auto 52px; text-align: center; }
.section-head h2 { font-size: clamp(27px, 3.4vw, 38px); margin: 16px 0 0; }
.section-head p { margin-top: 15px; font-size: 17px; }

/* two editors */
.duo { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.duo-card {
  background: #fff; border: 1px solid var(--px-border); border-radius: var(--px-radius);
  padding: 30px; box-shadow: var(--px-shadow-sm);
  transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}
.duo-card:hover { border-color: var(--px-primary-line); box-shadow: var(--px-shadow); transform: translateY(-2px); }
.duo-icon {
  width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center;
  background: var(--px-primary-ghost); color: var(--px-primary-dark); font-size: 24px; margin-bottom: 18px;
}
.duo-card h3 { font-size: 21px; }
.duo-card > p { margin-top: 10px; font-size: 15px; }
.ticks { list-style: none; margin: 18px 0 0; padding: 0; display: grid; gap: 9px; }
.ticks li { display: flex; gap: 10px; font-size: 14.5px; align-items: flex-start; }
.ticks iconify-icon { color: var(--px-primary); font-size: 18px; flex: none; margin-top: 2px; }

/* capability grid */
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cap {
  background: #fff; border: 1px solid var(--px-border); border-radius: var(--px-radius);
  padding: 26px; transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}
.cap:hover { border-color: var(--px-primary-line); box-shadow: var(--px-shadow); transform: translateY(-2px); }
.cap iconify-icon.ico { font-size: 26px; color: var(--px-primary); }
.cap h3 { font-size: 17px; margin: 14px 0 8px; }
.cap p { font-size: 14.5px; }

/* AI band */
.band { background: var(--px-bg-deep); color: #C9D6D2; }
.band h2, .band h3 { color: #fff; }
.band .section-head p { color: #9BADA8; }
.band .eyebrow { color: #7BE0C0; background: rgba(57,181,146,.12); border-color: rgba(57,181,146,.3); }
.ai-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.ai-item {
  background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.09);
  border-radius: var(--px-radius); padding: 22px;
}
.ai-item iconify-icon { font-size: 23px; color: var(--px-primary); }
.ai-item h3 { font-size: 16px; margin: 12px 0 7px; }
.ai-item p { font-size: 14px; line-height: 1.55; color: #93A5A0; }
.band-note {
  margin-top: 34px; padding: 18px 22px; border-radius: var(--px-radius);
  background: rgba(57,181,146,.1); border: 1px solid rgba(57,181,146,.24);
  display: flex; align-items: center; gap: 14px; font-size: 15px; color: #D5E5E0;
}
.band-note iconify-icon { font-size: 22px; color: var(--px-primary); flex: none; }

/* steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; counter-reset: s; }
.step { position: relative; padding-top: 8px; }
.step-n {
  width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center;
  background: var(--px-primary); color: #fff; font-family: var(--font-display);
  font-weight: 700; font-size: 17px; margin-bottom: 16px;
}
.step h3 { font-size: 18px; margin-bottom: 8px; }
.step p { font-size: 15px; }

/* plan tiers */
.tiers { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; align-items: stretch; }
.tier {
  position: relative; display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--px-border); border-radius: var(--px-radius);
  padding: 24px 20px;
  transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}
.tier:hover { border-color: var(--px-primary-line); box-shadow: var(--px-shadow); transform: translateY(-2px); }
.tier.feature { border-color: var(--px-primary); box-shadow: var(--px-shadow); }
.tier-badge {
  position: absolute; top: -11px; left: 20px;
  background: var(--px-primary); color: #fff;
  font-size: 11px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  padding: 4px 10px; border-radius: 999px;
}
.tier-name { font-size: 17px; margin: 0; }
.tier-price { margin: 10px 0 0; }
.tier-price .amt { font-family: var(--font-display); font-size: 32px; font-weight: 800; color: var(--px-ink); letter-spacing: -.02em; }
.tier-price .per { font-size: 14px; color: var(--px-dim); margin-left: 3px; }
.tier .who { margin: 8px 0 0; font-size: 14px; color: var(--px-dim); min-height: 42px; }
.tier .ticks { flex: 1; margin-top: 16px; }
/* The label is one span, so it wraps as a paragraph instead of breaking
   between the number and its unit. */
.tier .ticks li { font-size: 14px; align-items: flex-start; }
.tier .ticks li > span { flex: 1; min-width: 0; }
.tier-cta { margin-top: 20px; width: 100%; }
@media (max-width: 1100px) { .tiers { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 720px)  { .tiers { grid-template-columns: 1fr; } .tier .who { min-height: 0; } }

/* pricing */
.plans { display: grid; grid-template-columns: 1fr 1.15fr; gap: 22px; align-items: start; }
.plan {
  background: #fff; border: 1px solid var(--px-border); border-radius: var(--px-radius);
  padding: 30px; box-shadow: var(--px-shadow-sm);
}
.plan.feature { border-color: var(--px-primary-line); box-shadow: var(--px-shadow); }
.plan-tag {
  display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: .07em;
  text-transform: uppercase; color: var(--px-primary-dark);
  background: var(--px-primary-ghost); padding: 5px 12px; border-radius: 999px;
}
.plan h3 { font-size: 24px; margin: 14px 0 6px; }
.plan .who { font-size: 14.5px; color: var(--px-dim); }

table.price { width: 100%; border-collapse: collapse; margin-top: 20px; font-size: 14.5px; }
table.price th, table.price td { padding: 11px 8px; text-align: right; border-bottom: 1px solid var(--px-border); }
table.price th:first-child, table.price td:first-child { text-align: left; }
table.price thead th { font-size: 12px; letter-spacing: .05em; text-transform: uppercase; color: var(--px-dim); font-weight: 700; }
table.price tbody tr:last-child td { border-bottom: 0; }
table.price td.n { font-family: var(--font-mono); font-weight: 600; color: var(--px-ink); }
table.price td.n.pro { color: var(--px-primary-dark); }
.price-foot { margin-top: 16px; font-size: 13.5px; color: var(--px-dim); }

/* enterprise */
.enterprise {
  margin-top: 24px; display: flex; flex-wrap: wrap; gap: 20px; align-items: center;
  justify-content: space-between; padding: 26px 30px;
  background: #fff; border: 1px solid var(--px-border); border-radius: var(--px-radius);
}
.enterprise h3 { font-size: 19px; margin-bottom: 6px; }
.enterprise p { font-size: 14.5px; max-width: 560px; }

/* faq */
.faq { max-width: 800px; margin: 0 auto; }
.faq details {
  border: 1px solid var(--px-border); border-radius: var(--px-radius-sm);
  background: #fff; padding: 18px 22px; margin-bottom: 12px;
}
.faq summary {
  cursor: pointer; font-family: var(--font-display); font-weight: 700;
  font-size: 16px; color: var(--px-ink); list-style: none;
  display: flex; justify-content: space-between; gap: 16px; align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; font-size: 21px; color: var(--px-primary); font-weight: 600; }
.faq details[open] summary::after { content: '–'; }
.faq details p { margin-top: 12px; font-size: 15px; }

/* final cta */
.cta {
  background: linear-gradient(135deg, var(--px-primary), var(--px-primary-dark));
  border-radius: 22px; padding: 54px 44px; text-align: center; color: #fff;
}
.cta h2 { color: #fff; font-size: clamp(26px, 3.4vw, 36px); }
.cta p { margin: 14px auto 0; max-width: 560px; color: rgba(255,255,255,.9); font-size: 17px; }
.cta .btn { margin-top: 28px; background: #fff; color: var(--px-primary-dark); }
.cta .btn:hover { background: #F2FBF8; }

/* footer */
footer { background: var(--px-bg-deep); color: #8FA29D; padding: 60px 0 28px; font-size: 14.5px; }
.foot-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 34px; }
.foot-about { margin-top: 14px; max-width: 300px; font-size: 14px; line-height: 1.6; }
footer h4 { color: #fff; font-size: 13px; letter-spacing: .07em; text-transform: uppercase; margin-bottom: 14px; }
footer nav a { display: block; padding: 5px 0; color: #8FA29D; }
footer nav a:hover { color: var(--px-primary); }
.foot-bottom {
  margin-top: 44px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.09);
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; font-size: 13.5px;
}

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .grid3, .ai-grid, .steps { grid-template-columns: repeat(2, 1fr); }
  .plans, .duo { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .mock-body { grid-template-columns: 1.05fr 1fr 214px; }
  .mock-col.tree-col { display: none; }
}
@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-cta .btn-ghost { display: none; }
  /* The language picker and the primary CTA both live in the mobile menu, and
     the nav row has to survive labels longer than English. "Commencer à
     écrire" and "تسجيل الدخول" overflowed a 420px viewport where "Start
     writing" fitted — sized for the longest translation, not the shortest. */
  .nav-cta .lang { display: none; }
  .nav-cta .btn { padding: 8px 14px; font-size: 13.5px; }
  .section { padding: 62px 0; }
  .hero { padding: 54px 0 40px; }
  .grid3, .ai-grid, .steps, .foot-grid { grid-template-columns: 1fr; }
  .mock-body { grid-template-columns: 1fr; }
  .mock-col.code-col { display: none; }
  .cta { padding: 40px 24px; }
  .enterprise { flex-direction: column; align-items: flex-start; }
}

/* Narrow phones. The nav row is the tightest thing on the page and the one
   most affected by translation: French and Arabic labels are longer than the
   English they were laid out against. Sized for the longest, not the shortest. */
@media (max-width: 480px) {
  .nav-inner { gap: 12px; height: 62px; }
  .nav-cta { gap: 6px; }
  /* Both live in the mobile menu, so nothing becomes unreachable. */
  .nav-cta .btn-primary { display: none; }
  /* Decorative chips on the mock's title bar — the first thing to go. */
  .mock-actions { display: none; }
  .container { padding: 0 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn:hover, .cap:hover, .duo-card:hover { transform: none; }
}