/* ============================================================
   عَونَك — awnnak
   The studio desk: problem notes, a highlighter, and a blue
   rubber stamp pressed on every problem we solve.
============================================================ */

:root {
  /* colour */
  --paper: #F6F5F0;
  --card: #FFFFFF;
  --ink: #15171C;
  --ink-soft: #5D5F66;
  --line: #E3E1D8;
  --line-strong: #CFCCC0;
  --cobalt: #2E47D1;        /* stamp ink, buttons, links */
  --cobalt-deep: #2236A6;
  --cobalt-tint: #E9ECFB;
  --marker: #FFE066;        /* highlighter */
  --falsat: #F98A1A;        /* Falsat's own brand orange — only inside its card */

  /* type */
  --font-display: "Baloo Bhaijaan 2", "IBM Plex Sans Arabic", system-ui, sans-serif;
  --font-body-ar: "IBM Plex Sans Arabic", Tahoma, sans-serif;
  --font-body-en: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace; /* numbers & Latin only */
  /* Small labels. Plex Mono has no Arabic glyphs, and borrowing them keeps its wide
     monospace spaces, so Arabic labels use Plex Sans Arabic instead. */
  --font-label: "IBM Plex Sans Arabic", Tahoma, sans-serif;

  /* shape & space */
  --radius-s: 8px;
  --radius-m: 14px;
  --radius-l: 22px;
  --container: 1160px;
  --gutter: clamp(1.25rem, 4vw, 2rem);
  --section-y: clamp(4.5rem, 9vw, 7.5rem);
  --shadow-note: 0 1px 0 rgba(21, 23, 28, 0.04), 0 14px 30px -16px rgba(21, 23, 28, 0.24);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body-ar);
  font-size: 1.0625rem;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
html[lang="en"] { --font-label: var(--font-mono); }
html[lang="en"] body { font-family: var(--font-body-en); line-height: 1.65; }

h1, h2, h3, h4, p, ol, ul, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button, input, textarea { font: inherit; color: inherit; }

:focus-visible { outline: 3px solid var(--cobalt); outline-offset: 3px; }

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100px;
  inset-inline-start: 1rem;
  z-index: 100;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-s);
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
}
.skip-link:focus { top: 1rem; }

/* ---------- shared type ---------- */
.eyebrow {
  margin-block-end: 1rem;
  font-family: var(--font-label);
  font-size: 0.82rem;
  font-weight: 500;
  line-height: 1.5;
  color: var(--cobalt);
}
html[lang="en"] .eyebrow { font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; }

.section { padding-block: var(--section-y); }

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.95rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.35;
  text-wrap: balance;
}
html[lang="en"] .section-title { line-height: 1.1; letter-spacing: -0.02em; }

.lead {
  max-width: 58ch;
  margin-block-start: 1.25rem;
  font-size: 1.15rem;
  color: var(--ink-soft);
}

.section-sub {
  max-width: 56ch;
  margin-block-start: 1rem;
  font-size: 1.08rem;
  color: var(--ink-soft);
}

/* highlighter: sweeps across on load, in the reading direction */
.marker {
  padding-inline: 0.08em;
  background-color: transparent;
  background-image: linear-gradient(var(--marker), var(--marker));
  background-repeat: no-repeat;
  background-position: right 0 bottom 0.14em;
  background-size: 0% 0.42em;
  color: inherit;
  -webkit-box-decoration-break: clone;
          box-decoration-break: clone;
  animation: marker-sweep 0.9s var(--ease) 0.5s forwards;
}
html[dir="ltr"] .marker { background-position: left 0 bottom 0.14em; }
@keyframes marker-sweep { to { background-size: 100% 0.42em; } }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 48px;
  padding: 0.7rem 1.5rem;
  border: 1.5px solid transparent;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease), transform 0.18s var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--cobalt); color: #fff; }
.btn-primary:hover { background: var(--cobalt-deep); }
.btn-small { min-height: 40px; padding: 0.45rem 1.15rem; font-size: 0.98rem; }

/* ---------- the rubber stamp (signature element) ---------- */
.stamp {
  position: absolute;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  padding: 0.5em 0.85em 0.42em;
  border: 3px solid currentColor;
  border-radius: 10px;
  box-shadow: inset 0 0 0 2px var(--card), inset 0 0 0 3.5px currentColor;
  color: var(--cobalt);
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  line-height: 1;
  white-space: nowrap;
  opacity: 0.9;
  transform: rotate(-9deg);
  mix-blend-mode: multiply;
  filter: url(#ink-grain);
  pointer-events: none;
  user-select: none;
}
.stamp::before { content: "✓"; }
html[lang="en"] .stamp {
  padding: 0.55em 0.9em 0.5em;
  font-size: 1rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246, 245, 240, 0.88);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
          backdrop-filter: saturate(1.4) blur(12px);
  border-block-end: 1px solid transparent;
  transition: border-color 0.2s var(--ease);
}
.site-header.is-scrolled { border-block-end-color: var(--line); }

.header-row {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  margin-inline-end: auto;
  text-decoration: none;
}
.brand-mark {
  display: grid;
  place-items: center;
  flex: none;
  width: 40px;
  height: 40px;
  padding-block-start: 0.12em;
  border-radius: 50%;
  background: var(--cobalt);
  box-shadow: inset 0 0 0 3px var(--cobalt), inset 0 0 0 4.5px var(--paper);
  color: var(--paper);
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  line-height: 1;
  transform: rotate(-8deg);
}
.brand-name {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 800;
  line-height: 1;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}
.nav-links a:not(.btn) {
  padding-block: 0.3rem;
  background-image: linear-gradient(var(--marker), var(--marker));
  background-repeat: no-repeat;
  background-position: right 0 bottom 0.2em;
  background-size: 0 0.4em;
  color: var(--ink-soft);
  font-weight: 500;
  text-decoration: none;
  transition: background-size 0.25s var(--ease), color 0.2s var(--ease);
}
html[dir="ltr"] .nav-links a:not(.btn) { background-position: left 0 bottom 0.2em; }
.nav-links a:not(.btn):hover { background-size: 100% 0.4em; color: var(--ink); }

.header-tools { display: flex; align-items: center; gap: 0.5rem; }

.lang-toggle {
  min-width: 48px;
  min-height: 40px;
  padding: 0 0.85rem;
  border: 1.5px solid var(--line-strong);
  border-radius: 999px;
  background: transparent;
  font-family: var(--font-label);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.18s var(--ease);
}
.lang-toggle:hover { border-color: var(--ink); }

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1.5px solid var(--line-strong);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}
.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform 0.2s var(--ease), background-color 0.2s var(--ease);
}
.menu-toggle span { position: relative; }
.menu-toggle span::before,
.menu-toggle span::after { content: ""; position: absolute; inset-inline-start: 0; }
.menu-toggle span::before { top: -6px; }
.menu-toggle span::after { top: 6px; }
.menu-toggle[aria-expanded="true"] span { background: transparent; }
.menu-toggle[aria-expanded="true"] span::before { transform: translateY(6px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span::after { transform: translateY(-6px) rotate(-45deg); }

/* ---------- hero ---------- */
.hero { padding-block: clamp(2.75rem, 7vw, 5.5rem) clamp(3.5rem, 7vw, 6rem); }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.75fr);
  align-items: center;
  gap: clamp(2.5rem, 5vw, 4.5rem);
}

/* sized so each of the two lines (~10em wide) fits the column on desktop */
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.4vw, 4.1rem);
  font-weight: 800;
  line-height: 1.32;
  text-wrap: balance;
}
html[lang="en"] .hero-title { font-size: clamp(2.2rem, 5vw, 3.8rem); line-height: 1.08; letter-spacing: -0.025em; }

.hero-sub {
  max-width: 54ch;
  margin-block-start: 1.4rem;
  font-size: 1.15rem;
  color: var(--ink-soft);
}

.hero-form { margin-block-start: 2rem; max-width: 600px; }
.hero-field {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem;
  padding-inline-start: 1.25rem;
  border: 1.5px solid var(--ink);
  border-radius: 999px;
  background: var(--card);
  transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}
.hero-field:focus-within { border-color: var(--cobalt); box-shadow: 0 0 0 4px var(--cobalt-tint); }
.hero-field input {
  flex: 1;
  min-width: 0;
  padding-block: 0.7rem;
  border: 0;
  outline: none;
  background: transparent;
  font-size: 1.05rem;
}
.hero-field input::placeholder { color: #8C8D93; }
.hero-hint { margin-block-start: 0.7rem; font-size: 0.9rem; color: var(--ink-soft); }

/* the taped problem note */
.hero-note-wrap {
  position: relative;
  justify-self: center;
  width: 100%;
  max-width: 390px;
  padding: 1rem 1rem 2rem;
}
.note {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: var(--card);
  box-shadow: var(--shadow-note);
}
.note-ghost {
  position: absolute;
  inset: 1rem 1rem 2rem;
  opacity: 0.7;
  transform: rotate(-4deg);
}
html[dir="ltr"] .note-ghost { transform: rotate(4deg); }
.hero-note { padding: 2.2rem 1.6rem 1.75rem; transform: rotate(1.5deg); }
html[dir="ltr"] .hero-note { transform: rotate(-1.5deg); }

.tape {
  position: absolute;
  top: -13px;
  left: 50%;
  width: 96px;
  height: 26px;
  background: rgba(255, 224, 102, 0.8);
  box-shadow: 0 1px 2px rgba(21, 23, 28, 0.06);
  transform: translateX(-50%) rotate(-4deg);
}

.note-label {
  margin-block-end: 0.8rem;
  font-family: var(--font-label);
  font-size: 0.78rem;
  color: var(--cobalt);
}
.note-text {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.6;
}
html[lang="en"] .note-text { font-size: 1.28rem; line-height: 1.35; }

.note-solution {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-block-start: 1.25rem;
  padding-block-start: 1rem;
  border-block-start: 1.5px dashed var(--line-strong);
  font-weight: 500;
}
.note-solution img { width: 36px; height: 36px; border-radius: 9px; }
.note-solution a { color: var(--cobalt); text-underline-offset: 0.25em; }

.stamp-hero { inset-block-end: -1.3rem; inset-inline-end: -0.6rem; }

/* ---------- problem ticker ---------- */
.desk {
  padding-block: 2.5rem 2.75rem;
  border-block: 1px solid var(--line);
  background: var(--card);
}
.desk-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.25rem 2rem;
  margin-block-end: 1.5rem;
}
.desk-head .eyebrow { margin: 0; }
.desk-sub { font-size: 0.95rem; color: var(--ink-soft); }

.ticker {
  overflow: hidden;
  padding-block: 0.5rem;
  -webkit-mask-image: linear-gradient(to right, transparent 0, #000 5%, #000 95%, transparent 100%);
          mask-image: linear-gradient(to right, transparent 0, #000 5%, #000 95%, transparent 100%);
}
.ticker:focus-visible { outline-offset: -3px; }

/* The track holds the list twice. Shifting it by exactly half loops seamlessly.
   RTL content overflows to the left, so it travels right; LTR travels left. */
.ticker-track {
  display: flex;
  width: max-content;
  animation: ticker-rtl var(--ticker-duration, 40s) linear infinite;
}
html[dir="ltr"] .ticker-track { animation-name: ticker-ltr; }
@keyframes ticker-rtl { to { transform: translateX(50%); } }
@keyframes ticker-ltr { to { transform: translateX(-50%); } }
.ticker:hover .ticker-track,
.ticker:focus-within .ticker-track { animation-play-state: paused; }

.ticker-card {
  display: flex;
  flex: none;
  flex-direction: column;
  gap: 0.6rem;
  width: 290px;
  margin-inline-end: 1rem; /* margin, not gap, so each half is exactly equal */
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--paper);
}
.ticker-problem { flex: 1; font-size: 1rem; line-height: 1.65; }
.ticker-name { font-size: 0.85rem; font-weight: 500; color: var(--ink-soft); }
.ticker-name::before { content: "— "; }

.chip {
  align-self: flex-start;
  padding: 0.15rem 0.6rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink-soft);
  font-family: var(--font-label);
  font-size: 0.74rem;
  font-weight: 500;
  line-height: 1.6;
}
html[lang="en"] .chip { font-size: 0.68rem; letter-spacing: 0.06em; text-transform: uppercase; }
/* one colour per area; "family" keeps the plain outline */
.chip-money    { border-color: transparent; background: #FFF1E2; color: #B35A00; }
.chip-day      { border-color: transparent; background: var(--marker); color: var(--ink); }
.chip-business { border-color: transparent; background: var(--cobalt-tint); color: var(--cobalt-deep); }

/* ---------- the idea ---------- */
.idea-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.9fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 4.5rem);
}

.dict-card {
  max-width: 520px;
  padding: 1.75rem 1.75rem 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--card);
  box-shadow: var(--shadow-note);
}
.dict-word {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem;
  margin-block-end: 1rem;
  padding-block-end: 0.75rem;
  border-block-end: 1px solid var(--line);
}
.dict-term {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--cobalt);
}
.dict-pos { font-family: var(--font-label); font-size: 0.8rem; color: var(--ink-soft); }
.dict-senses { display: grid; gap: 0.35rem; counter-reset: sense; }
.dict-senses li { display: flex; gap: 0.6rem; counter-increment: sense; }
.dict-senses li::before {
  content: counter(sense, arabic-indic) ".";
  min-width: 1.2em;
  font-family: var(--font-label);
  color: var(--cobalt);
}
html[lang="en"] .dict-senses li::before { content: counter(sense) "."; }
.dict-usage {
  margin-block-start: 1rem;
  padding-block-start: 0.9rem;
  border-block-start: 1.5px dashed var(--line-strong);
  color: var(--ink-soft);
}
.dict-usage strong { color: var(--ink); }

.principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.5rem, 3vw, 2.5rem);
  margin-block-start: clamp(3rem, 6vw, 4.5rem);
}
.principle { padding-block-start: 1.1rem; border-block-start: 2px solid var(--ink); }
.principle h3 {
  margin-block-end: 0.4rem;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1.4;
}
.principle p { color: var(--ink-soft); }

/* ---------- apps ---------- */
.app-card {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(1.75rem, 4vw, 3rem);
  margin-block-start: 2.5rem;
  padding: clamp(1.5rem, 4vw, 2.75rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background: var(--card);
  box-shadow: var(--shadow-note);
}
.app-main {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.app-head {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-inline-end: 9.5rem; /* room for the stamp */
}
.app-icon { flex: none; width: 64px; height: 64px; border-radius: 16px; }
.app-name {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.2;
}
.app-kicker { font-size: 0.95rem; color: var(--ink-soft); }

.stamp-app { top: 0.4rem; inset-inline-end: 0.25rem; }
.js .stamp-app { opacity: 0; }
.js .stamp-app.is-stamped { animation: stamp-thump 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) forwards; }
@keyframes stamp-thump {
  0%   { opacity: 0;    transform: rotate(-16deg) scale(1.8); }
  55%  { opacity: 0.95; transform: rotate(-8deg) scale(0.92); }
  100% { opacity: 0.9;  transform: rotate(-9deg) scale(1); }
}

.app-story { display: grid; gap: 1rem; }
.app-story div {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  align-items: baseline;
  gap: 1rem;
}
.app-story dt { font-family: var(--font-label); font-size: 0.8rem; color: var(--cobalt); }
.app-story dd { font-size: 1.05rem; }

.app-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  margin-block-start: auto;
}
.app-url { font-family: var(--font-mono); font-size: 0.85rem; color: var(--ink-soft); }

.app-features { padding: 1.5rem; border-radius: var(--radius-m); background: var(--paper); }
.features-label {
  margin-block-end: 1rem;
  font-family: var(--font-label);
  font-size: 0.8rem;
  color: var(--cobalt);
}
.feature-list { display: grid; gap: 0.9rem; }
.feature-list li { position: relative; padding-inline-start: 1.2rem; }
.feature-list li::before {
  content: "";
  position: absolute;
  top: 0.72em;
  inset-inline-start: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--falsat); /* the dot from Falsat's "F." icon */
}
.feature-list strong { display: block; font-weight: 600; }
.feature-list span { display: block; font-size: 0.95rem; line-height: 1.6; color: var(--ink-soft); }

.stack { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-block-start: 1.25rem; }
.stack span {
  padding: 0.15rem 0.6rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.areas { margin-block-start: clamp(3.5rem, 7vw, 5rem); }
.areas-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 0.4rem 2rem;
  margin-block-end: 1.5rem;
}
.areas-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.6vw, 1.85rem);
  font-weight: 800;
  line-height: 1.4;
}
.areas-head p { max-width: 46ch; color: var(--ink-soft); }

.areas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 1rem;
}
.area-card {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1.4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--card);
}
.area-icon { width: 30px; height: 30px; margin-block-end: 0.4rem; color: var(--cobalt); }
.area-card h4 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
}
.area-card p { font-size: 0.95rem; line-height: 1.65; color: var(--ink-soft); }
.area-tag {
  align-self: flex-start;
  margin-block-start: 0.4rem;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  background: #FFF1E2;
  color: #B35A00;
  font-family: var(--font-label);
  font-size: 0.74rem;
}

.area-next {
  grid-column: 1 / -1;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding: 1.4rem 1.6rem;
  border: 2px dashed var(--line-strong);
  background: transparent;
  transition: border-color 0.2s var(--ease);
}
.area-next:hover { border-color: var(--cobalt); }
.area-next h4 { font-size: 1.3rem; }

.link-arrow {
  color: var(--cobalt);
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}
.link-arrow::after { content: " ←"; }
html[dir="ltr"] .link-arrow::after { content: " →"; }
.link-arrow:hover { text-decoration: underline; text-underline-offset: 0.3em; }

/* ---------- how we work ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1.25rem;
  margin-block-start: 2.75rem;
}
/* a dashed path that turns solid blue at the last step: the problem is solved */
.step { padding-block-start: 1.1rem; border-block-start: 2px dashed var(--line-strong); }
.step:last-child { border-block-start: 2px solid var(--cobalt); }
.step-num {
  display: block;
  margin-block-end: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--cobalt);
}
.step h3 {
  margin-block-end: 0.35rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.4;
}
.step p { font-size: 0.97rem; line-height: 1.7; color: var(--ink-soft); }

/* ---------- send a problem ---------- */
.send { border-block-start: 1px solid var(--line); }
.send-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  align-items: start;
  gap: clamp(2rem, 5vw, 4.5rem);
}

.send-form { display: grid; gap: 1.1rem; max-width: 620px; margin-block-start: 2rem; }
.field { display: grid; gap: 0.4rem; }
.field label { font-size: 0.95rem; font-weight: 600; }
.field-note { font-weight: 400; color: var(--ink-soft); }
.field input,
.field textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1.5px solid var(--line-strong);
  border-radius: var(--radius-s);
  background: var(--card);
  font-size: 1rem;
  line-height: 1.6;
  transition: border-color 0.15s var(--ease), box-shadow 0.15s var(--ease);
}
.field textarea { min-height: 140px; resize: vertical; }
.field input:focus,
.field textarea:focus { outline: none; border-color: var(--cobalt); box-shadow: 0 0 0 4px var(--cobalt-tint); }
.field textarea::placeholder { color: #8C8D93; }

.form-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 1.25rem; }
.form-note { max-width: 38ch; font-size: 0.88rem; line-height: 1.6; color: var(--ink-soft); }
.form-status { min-height: 1.5em; font-size: 0.92rem; color: var(--cobalt-deep); }
.form-status a { font-family: var(--font-mono); }

.preview { position: sticky; top: 6.5rem; padding-block-start: 1rem; }
.preview-label {
  margin-block-end: 1.75rem;
  font-family: var(--font-label);
  font-size: 0.8rem;
  color: var(--ink-soft);
}
.preview-note { padding: 2.2rem 1.6rem 1.6rem; transform: rotate(-1.2deg); }
html[dir="ltr"] .preview-note { transform: rotate(1.2deg); }
.preview-note .note-text { min-height: 5.5em; white-space: pre-wrap; overflow-wrap: anywhere; }
.preview-note.is-empty .note-text { color: var(--ink-soft); font-weight: 500; }
.note-from { margin-block-start: 1rem; font-size: 0.92rem; color: var(--ink-soft); }

/* ---------- footer ---------- */
.site-footer { padding-block: 2.25rem; border-block-start: 1px solid var(--line); }
.footer-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem 2rem;
}
.footer-brand { display: flex; align-items: center; gap: 0.75rem; font-weight: 500; }
.footer-brand .brand-mark { width: 32px; height: 32px; font-size: 1.05rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; }
.footer-links a { font-size: 0.95rem; color: var(--ink-soft); text-decoration: none; }
.footer-links a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 0.3em; }
.footer-copy { font-family: var(--font-label); font-size: 0.85rem; color: var(--ink-soft); }

/* ---------- responsive ---------- */
@media (max-width: 1000px) {
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem 1.5rem; }
}

@media (max-width: 900px) {
  .hero-grid,
  .idea-grid,
  .send-grid,
  .app-card { grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr; }
  .preview { position: static; }
}

@media (max-width: 860px) {
  .menu-toggle { display: inline-flex; }
  .nav-links {
    position: absolute;
    top: 100%;
    inset-inline: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem var(--gutter) 1.25rem;
    border-block-end: 1px solid var(--line);
    background: var(--paper);
    box-shadow: 0 18px 30px -24px rgba(21, 23, 28, 0.4);
  }
  .nav.is-open .nav-links { display: flex; }
  .nav-links a:not(.btn) {
    display: block;
    padding: 0.85rem 0.25rem;
    border-block-end: 1px solid var(--line);
    background: none;
    font-size: 1.1rem;
  }
  .nav-cta-item { margin-block-start: 1rem; }
  .nav-cta-item .btn { width: 100%; }
}

@media (max-width: 560px) {
  .hero-field {
    flex-direction: column;
    align-items: stretch;
    padding: 0.5rem;
    border-radius: var(--radius-m);
  }
  .hero-field input { padding-inline: 0.75rem; }
  .app-head { flex-wrap: wrap; padding-inline-end: 0; }
  .stamp-app { position: relative; top: auto; inset-inline-end: auto; align-self: flex-start; margin-block: -0.25rem 0.25rem; }
  .app-story div { grid-template-columns: 1fr; gap: 0.2rem; }
  .steps { grid-template-columns: 1fr; }
  .area-next { flex-direction: column; align-items: flex-start; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .marker { animation: none; background-size: 100% 0.42em; }
  .ticker-track { animation: none !important; }
  .ticker { overflow-x: auto; -webkit-mask-image: none; mask-image: none; }
  .ticker-card[aria-hidden="true"] { display: none; }
}