/* ============================================================
   WritePair — landing page
   Tokens → base → components → sections → motion → responsive
   ============================================================ */

:root {
  /* palette — the brand's own world: lavender-white + indigo→lavender + navy */
  --canvas:        #f7f5fc;
  --canvas-2:      #efeaf7;
  --surface:       #ffffff;
  --ink:           #1a1633;
  --ink-soft:      #4b4566;
  --ink-faint:     #6f6a86;
  --line:          #e7e1f3;

  --blue:          #2563eb;
  --indigo:        #5b46e0;
  --violet:        #7c3aed;
  --lavender:      #b794f6;
  --lav-mist:      #ebe5fa;
  --sel:           #bfd7ff;

  --navy:          #0b1538;
  --navy-2:        #111f4d;
  --navy-line:     #2a3a6e;
  --on-navy:       #e8ecfb;
  --on-navy-soft:  #a7b1d8;

  --w-grad: linear-gradient(115deg, #2563eb 0%, #6d5cf6 48%, #b794f6 100%);
  --w-grad-soft: linear-gradient(115deg, #eef2ff 0%, #f3edff 100%);

  /* type */
  --font-sans: "Nunito Sans", "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  /* shape & depth */
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(26,22,51,.06), 0 4px 12px rgba(26,22,51,.05);
  --shadow-md: 0 10px 30px rgba(43,33,90,.10), 0 2px 8px rgba(43,33,90,.06);
  --shadow-lg: 0 30px 70px rgba(43,33,90,.20), 0 8px 24px rgba(43,33,90,.10);

  --maxw: 1140px;
  --pad: clamp(1.1rem, 4vw, 2rem);
}

/* ---------- reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--canvas);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: var(--blue); text-decoration: none; }
h1, h2, h3 { margin: 0; line-height: 1.05; letter-spacing: -0.02em; overflow-wrap: break-word; }
p { margin: 0; }

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

.skip-link {
  position: absolute; left: 50%; top: -100px; transform: translateX(-50%);
  background: var(--ink); color: #fff; padding: .6rem 1rem; border-radius: var(--r-sm);
  z-index: 100; transition: top .2s;
}
.skip-link:focus { top: .6rem; }

:focus-visible { outline: 3px solid var(--violet); outline-offset: 2px; border-radius: 6px; }

/* gradient ink for keywords */
.grad-text {
  background: var(--w-grad);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}

/* ---------- eyebrow (mono utility face) ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: .72rem; font-weight: 500;
  letter-spacing: .2em; text-transform: uppercase;
  color: var(--violet);
  margin: 0 0 1rem;
}
.eyebrow--light { color: var(--lavender); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  font-family: var(--font-sans); font-weight: 800; font-size: 1rem;
  padding: .85rem 1.4rem; border-radius: var(--r-pill);
  border: 1px solid transparent; cursor: pointer; white-space: nowrap;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
}
.btn--solid {
  color: #fff; background: var(--w-grad);
  box-shadow: 0 8px 22px rgba(91,70,224,.35);
}
.btn--solid:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(91,70,224,.42); }
.btn--ghost {
  color: var(--ink); background: var(--surface);
  border-color: var(--line); box-shadow: var(--shadow-sm);
}
.btn--ghost:hover { transform: translateY(-2px); border-color: var(--lavender); }
.btn--sm  { padding: .6rem 1.05rem; font-size: .92rem; }
.btn--xs  { padding: .5rem .9rem; font-size: .85rem; }
.btn--lg  { padding: 1.05rem 2rem; font-size: 1.12rem; }

.linkbtn {
  font-family: var(--font-sans); font-weight: 700; font-size: .85rem;
  color: var(--ink-soft); background: none; border: 0; cursor: pointer;
  padding: .5rem .4rem; border-radius: 8px; transition: color .15s;
}
.linkbtn:hover { color: var(--violet); }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(1.2) blur(10px);
  background: color-mix(in srgb, var(--canvas) 78%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color .25s, background .25s;
}
.nav.is-scrolled { border-bottom-color: var(--line); background: color-mix(in srgb, var(--canvas) 92%, transparent); }
.nav__inner { display: flex; align-items: center; gap: 1.5rem; height: 66px; }
.brand { display: inline-flex; align-items: center; gap: .55rem; color: var(--ink); font-weight: 900; }
.brand__mark { border-radius: 8px; box-shadow: var(--shadow-sm); }
.brand__name { font-size: 1.15rem; letter-spacing: -.02em; }
.nav__links { display: flex; gap: 1.4rem; margin-left: auto; }
.nav__links a { color: var(--ink-soft); font-weight: 700; font-size: .95rem; }
.nav__links a:hover { color: var(--ink); }

/* ---------- section rhythm ---------- */
.section { padding-block: clamp(3.5rem, 8vw, 6.5rem); }
.section--tight { padding-block: clamp(3rem, 6vw, 5rem); }
.section__head { max-width: 640px; margin: 0 auto clamp(2rem, 4vw, 3.25rem); text-align: center; }
.section__title { font-size: clamp(1.9rem, 4vw, 3rem); font-weight: 900; text-wrap: balance; }
.section__lead { color: var(--ink-soft); font-size: 1.18rem; margin-top: 1rem; }
.section__lead--center { max-width: 720px; margin-inline: auto; text-align: center; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(120% 80% at 12% -10%, var(--lav-mist) 0%, transparent 55%),
    radial-gradient(90% 70% at 100% 0%, #e6f0ff 0%, transparent 50%),
    var(--canvas);
}
.hero__grid {
  display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem); align-items: center;
}
.hero__copy, .hero__demo { min-width: 0; }
.hero__title { font-size: clamp(2.15rem, 5.4vw, 4.3rem); font-weight: 900; letter-spacing: -.035em; }
.hero__lead { color: var(--ink-soft); font-size: 1.22rem; margin-top: 1.4rem; max-width: 34ch; }
.hero__cta { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }
.trust {
  list-style: none; display: flex; flex-wrap: wrap; gap: 1.1rem;
  margin: 1.6rem 0 0; padding: 0;
  font-family: var(--font-mono); font-size: .78rem; letter-spacing: .04em;
  color: var(--ink-faint);
}
.trust li { display: inline-flex; align-items: center; gap: .45rem; }
.trust li::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--w-grad); }

/* ---------- demo window (signature) ---------- */
.window {
  margin: 0;
  background: var(--surface); border-radius: var(--r-lg);
  box-shadow: var(--shadow-lg); border: 1px solid var(--line);
  overflow: hidden;
}
.window__bar {
  display: flex; align-items: center; gap: .8rem;
  padding: .7rem 1rem; background: var(--canvas-2); border-bottom: 1px solid var(--line);
}
.dots { display: inline-flex; gap: .4rem; }
.dots i { width: 11px; height: 11px; border-radius: 50%; background: #d9d2ea; }
.dots i:nth-child(1){ background:#ff5f57; } .dots i:nth-child(2){ background:#febc2e; } .dots i:nth-child(3){ background:#28c840; }
.window__url {
  font-family: var(--font-mono); font-size: .76rem; color: var(--ink-faint);
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-pill);
  padding: .3rem .9rem; flex: 1; text-align: center;
}
.window__body { position: relative; padding: 1.5rem 1.5rem 1.6rem; min-height: 270px; }
.draft__meta { color: var(--ink-faint); margin-bottom: .6rem; }

.field {
  font-size: 1.12rem; line-height: 1.55; color: var(--ink);
  border-radius: var(--r-sm); padding: .2rem 0;
}
.field__sel { background: var(--sel); color: var(--ink); border-radius: 4px; padding: .05em .12em; transition: background .25s; }
.field__sel.is-replaced { background: #d7f5e1; }

/* floating toolbar */
.toolbar {
  position: absolute; left: 1.5rem; top: 132px;
  display: inline-flex; align-items: center; gap: .15rem;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-pill); padding: .3rem; box-shadow: var(--shadow-md);
  transition: opacity .25s, transform .25s;
}
.toolbar.is-dim { opacity: 0; pointer-events: none; transform: translateY(-4px); }
.toolbar__btn {
  font-family: var(--font-sans); font-weight: 800; font-size: .82rem; letter-spacing: .02em;
  text-transform: uppercase; color: var(--ink-soft);
  background: none; border: 0; cursor: pointer;
  padding: .5rem .85rem; border-radius: var(--r-pill); transition: background .15s, color .15s;
}
.toolbar__btn:hover { color: var(--ink); background: var(--lav-mist); }
.toolbar__btn.is-active { color: var(--blue); background: #eaf1ff; }

/* result preview */
.preview {
  position: absolute; right: 1.5rem; bottom: 1.5rem; left: auto;
  width: min(330px, 70%);
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-md); box-shadow: var(--shadow-lg);
  padding: 1.1rem 1.15rem;
  animation: pop .28s cubic-bezier(.2,.9,.3,1.2) both;
}
.preview[hidden] { display: none; }
.preview__label {
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .16em;
  text-transform: uppercase; color: var(--ink-faint); margin-bottom: .55rem;
}
.preview__text { font-size: 1rem; color: var(--ink); min-height: 3.2em; }
.preview__text.is-thinking { color: var(--ink-faint); }
.preview__actions { display: flex; align-items: center; gap: .35rem; margin-top: .9rem; }
.preview__actions .btn { margin-right: .25rem; }

.window__hint {
  font-size: .82rem; color: var(--ink-faint);
  padding: .85rem 1.5rem; border-top: 1px solid var(--line); background: var(--canvas);
}

/* thinking shimmer dots */
.dot-flash::after { content: "•••"; letter-spacing: .25em; animation: flash 1s steps(3,end) infinite; }

/* ============================================================
   CARDS / ACTIONS
   ============================================================ */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.1rem; }
.cards--3 { grid-template-columns: repeat(3, 1fr); }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-md);
  padding: 1.5rem 1.4rem; box-shadow: var(--shadow-sm);
  transition: transform .18s, box-shadow .25s, border-color .25s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--lavender); }
.card__title { font-size: 1.3rem; font-weight: 900; margin-bottom: .55rem; }
.card__body { color: var(--ink-soft); font-size: 1rem; }
.card__demo { margin-top: 1rem; font-size: .88rem; color: var(--ink-faint); line-height: 1.5; }
.card__demo s { color: var(--ink-faint); opacity: .8; }
.card__arrow { color: var(--violet); font-weight: 900; }
.chip {
  display: inline-block; font-family: var(--font-mono); font-size: .68rem;
  background: var(--lav-mist); color: var(--violet); border-radius: var(--r-pill);
  padding: .2rem .55rem; margin: .15rem .25rem .15rem 0;
}

/* email feature row */
.feature {
  display: grid; grid-template-columns: 1fr 1.15fr; gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center; margin-top: clamp(1.5rem, 4vw, 2.6rem);
  background: var(--w-grad-soft); border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: clamp(1.5rem, 4vw, 2.6rem);
}
.feature__title { font-size: clamp(1.4rem, 2.6vw, 1.9rem); font-weight: 900; margin: .6rem 0 .8rem; }
.feature__shot { border-radius: var(--r-md); box-shadow: var(--shadow-md); border: 1px solid var(--line); }

/* ---------- card on dark spotlight ---------- */
.card--dark {
  background: color-mix(in srgb, var(--navy-2) 85%, #fff 0%);
  border-color: var(--navy-line); box-shadow: none; color: var(--on-navy);
}
.card--dark:hover { border-color: var(--lavender); transform: translateY(-4px); }
.card--dark .card__title { color: #fff; }
.card--dark .card__body { color: var(--on-navy-soft); }
.check {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border-radius: 9px; margin-bottom: .9rem;
  background: var(--w-grad); color: #fff; font-weight: 900; font-size: .9rem;
}

/* ============================================================
   COVERAGE TICKER
   ============================================================ */
.ticker { overflow: hidden; margin: 1.5rem 0 2.2rem; mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.ticker__track {
  display: inline-flex; align-items: center; gap: 1.4rem; white-space: nowrap;
  font-family: var(--font-mono); font-weight: 500; font-size: clamp(1.1rem, 2.4vw, 1.7rem);
  color: var(--ink-soft);
  animation: marquee 38s linear infinite;
}
.ticker__track span:nth-child(even) { color: var(--lavender); }

/* ============================================================
   SPOTLIGHT (navy)
   ============================================================ */
.spotlight {
  background:
    radial-gradient(80% 120% at 50% -10%, var(--navy-2) 0%, transparent 60%),
    var(--navy);
  color: var(--on-navy);
}
.spotlight .section__title { color: #fff; }
.section__lead--light { color: var(--on-navy-soft); }

/* ============================================================
   STEPS (a real sequence → numbering is meaningful)
   ============================================================ */
.steps {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.1rem;
  counter-reset: step;
}
.step {
  position: relative; padding: 1.6rem 1.4rem; border-radius: var(--r-md);
  background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-sm);
}
.step__num {
  font-family: var(--font-mono); font-weight: 700; font-size: .95rem;
  background: var(--w-grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.step__title { font-size: 1.25rem; font-weight: 900; margin: .5rem 0 .5rem; }
/* connecting hairline between steps */
.step:not(:last-child)::after {
  content: ""; position: absolute; right: -.7rem; top: 50%; width: .7rem; height: 2px;
  background: var(--line);
}

/* ============================================================
   FINAL CTA
   ============================================================ */
.cta-band__inner {
  text-align: center; max-width: 760px; display: flex; flex-direction: column;
  align-items: center; gap: 1.3rem;
}
.cta-band__mark { border-radius: 16px; box-shadow: var(--shadow-md); }
.cta-band__title { font-size: clamp(2rem, 4.4vw, 3.2rem); font-weight: 900; }
.cta-band__note { color: var(--ink-faint); font-size: .95rem; max-width: 52ch; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer { background: var(--navy); color: var(--on-navy); padding-block: 2.6rem; }
.footer__inner { display: flex; flex-wrap: wrap; gap: 1.5rem; justify-content: space-between; align-items: center; }
.footer__brand { display: flex; align-items: center; gap: .8rem; }
.footer__brand img { border-radius: 7px; }
.footer__name { font-weight: 900; }
.footer__slogan { color: var(--on-navy-soft); font-size: .9rem; }
.footer__links { display: flex; flex-wrap: wrap; gap: 1.3rem; }
.footer__links a { color: var(--on-navy-soft); font-weight: 700; font-size: .92rem; }
.footer__links a:hover { color: #fff; }
.footer__meta {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: .5rem;
  margin-top: 1.6rem; padding-top: 1.4rem; border-top: 1px solid var(--navy-line);
  font-family: var(--font-mono); font-size: .76rem; color: var(--on-navy-soft);
}

/* ============================================================
   MOTION
   ============================================================ */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-in { opacity: 1; transform: none; }

@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@keyframes pop { from { opacity: 0; transform: translateY(10px) scale(.97); } to { opacity: 1; transform: none; } }
@keyframes flash { 0% { opacity: .3; } 50% { opacity: 1; } 100% { opacity: .3; } }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .ticker__track { animation: none; }
  .preview { animation: none; }
  .btn, .card, .step { transition: none; }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 940px) {
  .hero__grid { grid-template-columns: minmax(0, 1fr); }
  .hero__lead { max-width: 48ch; }
  .hero__demo { order: 2; }
  .cards, .cards--3, .steps { grid-template-columns: repeat(2, 1fr); }
  .feature { grid-template-columns: 1fr; }
  .feature__shot { order: -1; }
  .step:not(:last-child)::after { display: none; }
}
@media (max-width: 620px) {
  .nav__links { display: none; }
  .cards, .cards--3, .steps { grid-template-columns: 1fr; }
  .preview { position: static; width: 100%; margin-top: 1rem; }
  .toolbar { position: static; margin-top: 1rem; }
  .window__body { min-height: 0; }
}