/* ==========================================================================
   VerifAi, verifai.digital one pager
   Self contained. No framework, no build step, no external CSS.
   ========================================================================== */

:root {
  --ink:        #0F1B2D;
  --ink-800:    #1B2B44;
  --body:       #4A5A73;
  --muted:      #5A6880;

  --green:      #10A37F;   /* verification green, the lead accent */
  --green-700:  #0B7A5E;
  --green-100:  #E6F6F1;
  --green-200:  #BFE8DC;

  --blue:       #2563EB;
  --blue-100:   #E8EFFE;
  --amber:      #D97706;
  --amber-100:  #FDF1E3;

  --white:      #FFFFFF;
  --paper:      #F8FAFC;
  --paper-2:    #EFF3F8;
  --line:       #E2E8F0;
  --line-soft:  #EDF1F6;

  --radius:     16px;
  --radius-lg:  24px;
  --pill:       999px;

  --shadow-xs:  0 1px 2px rgba(15,27,45,.05);
  --shadow-sm:  0 2px 10px rgba(15,27,45,.06);
  --shadow:     0 10px 34px rgba(15,27,45,.09);
  --shadow-lg:  0 24px 64px rgba(15,27,45,.14);

  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  --mono: "Space Grotesk", ui-monospace, SFMono-Regular, Menlo, monospace;

  --wrap: 1120px;
  --nav-h: 72px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; font-family: var(--font); font-size: 16px; line-height: 1.65;
  color: var(--body); background: var(--white);
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
h1,h2,h3,h4 { color: var(--ink); margin: 0 0 .5em; font-weight: 800; letter-spacing: -.03em; line-height: 1.15; }
h1 { font-size: clamp(2.2rem, 5vw, 3.7rem); letter-spacing: -.042em; }
h2 { font-size: clamp(1.75rem, 3.4vw, 2.6rem); letter-spacing: -.036em; }
h3 { font-size: 1.14rem; letter-spacing: -.02em; }
p { margin: 0 0 1.05em; }
ul { margin: 0; padding: 0; list-style: none; }
::selection { background: var(--green-200); color: var(--ink); }

/* ---------- layout ---------- */
.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 24px; }
.section { padding: 92px 0; position: relative; }
.section--paper { background: var(--paper); }
.section--ink { background: var(--ink); color: rgba(255,255,255,.82); }
.section--ink h2, .section--ink h3 { color: #fff; }
.center { text-align: center; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .7rem; font-weight: 700; letter-spacing: .15em; text-transform: uppercase;
  color: var(--green-700); background: var(--green-100);
  border: 1px solid var(--green-200);
  padding: 6px 15px; border-radius: var(--pill); margin-bottom: 18px;
}
.eyebrow--light { color: #A7E8D4; background: rgba(16,163,127,.16); border-color: rgba(16,163,127,.35); }
.eyebrow i { width: 6px; height: 6px; border-radius: 50%; background: currentColor; flex: none; }

.sec-head { max-width: 700px; margin-bottom: 50px; }
.sec-head.center { margin-inline: auto; }
.sec-head p { font-size: 1.06rem; margin: 0; }
.section--ink .sec-head p { color: rgba(255,255,255,.72); }
.lead { font-size: 1.13rem; line-height: 1.7; }
.mark { color: var(--green); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 26px; font-size: .93rem; font-weight: 700; letter-spacing: -.01em;
  border-radius: var(--pill); border: 1.5px solid transparent;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
  white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; flex: none; }
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--green); color: #fff; box-shadow: 0 10px 26px rgba(16,163,127,.28); }
.btn--primary:hover { background: var(--green-700); box-shadow: 0 16px 36px rgba(16,163,127,.34); }
.btn--ghost { border-color: var(--line); color: var(--ink); background: #fff; }
.btn--ghost:hover { border-color: var(--green); color: var(--green-700); }
.btn--ghost-light { border-color: rgba(255,255,255,.26); color: #fff; background: rgba(255,255,255,.06); }
.btn--ghost-light:hover { border-color: #fff; background: rgba(255,255,255,.14); }
.btn--sm { padding: 10px 19px; font-size: .84rem; }
.btn--full { width: 100%; }

/* ---------- header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 900; height: var(--nav-h);
  background: rgba(255,255,255,.86);
  backdrop-filter: saturate(180%) blur(16px); -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.site-header.is-stuck { border-color: var(--line); box-shadow: 0 2px 20px rgba(15,27,45,.06); }
.nav { display: flex; align-items: center; gap: 22px; height: var(--nav-h); }
.brand { display: flex; align-items: center; gap: 10px; margin-right: auto; }
.brand__logo { height: 34px; width: auto; flex: none; }
.brand__name { font-weight: 800; font-size: 1.12rem; color: var(--ink); letter-spacing: -.035em; }
.brand__name em { font-style: normal; color: var(--green); }
.nav__links { display: flex; align-items: center; gap: 2px; }
.nav__links a {
  padding: 9px 13px; border-radius: var(--pill);
  font-size: .885rem; font-weight: 600; color: #4B5A70;
  transition: color .2s, background .2s;
}
.nav__links a:hover { color: var(--ink); background: var(--paper-2); }
.nav__toggle {
  display: none; width: 40px; height: 40px; border: 1px solid var(--line);
  border-radius: 11px; background: #fff; align-items: center; justify-content: center;
}
.nav__toggle span { display: block; width: 16px; height: 2px; background: var(--ink); border-radius: 2px; position: relative; }
.nav__toggle span::before, .nav__toggle span::after {
  content: ""; position: absolute; left: 0; width: 16px; height: 2px; background: var(--ink); border-radius: 2px;
  transition: transform .25s var(--ease), top .25s var(--ease);
}
.nav__toggle span::before { top: -5.5px; }
.nav__toggle span::after { top: 5.5px; }
.nav__toggle.is-open span { background: transparent; }
.nav__toggle.is-open span::before { top: 0; transform: rotate(45deg); }
.nav__toggle.is-open span::after { top: 0; transform: rotate(-45deg); }

/* ---------- hero ---------- */
.hero {
  position: relative; overflow: hidden; background: var(--paper);
  padding: calc(var(--nav-h) + 86px) 0 88px;
  border-bottom: 1px solid var(--line);
}
.hero::before {
  content: ""; position: absolute; width: 880px; height: 880px; border-radius: 50%;
  top: -430px; right: -240px; pointer-events: none;
  background: radial-gradient(circle, rgba(16,163,127,.17) 0%, rgba(16,163,127,0) 66%);
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(15,27,45,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15,27,45,.04) 1px, transparent 1px);
  background-size: 68px 68px;
  mask-image: radial-gradient(ellipse 84% 62% at 50% 26%, #000 30%, transparent 76%);
  -webkit-mask-image: radial-gradient(ellipse 84% 62% at 50% 26%, #000 30%, transparent 76%);
}
.hero .wrap { position: relative; z-index: 2; }
.hero__inner { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.hero h1 { margin-bottom: 20px; }
.hero__sub { font-size: 1.14rem; max-width: 540px; margin-bottom: 28px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 24px; }
.hero__note { font-size: .87rem; color: var(--muted); display: flex; align-items: center; gap: 8px; }
.hero__note svg { width: 16px; height: 16px; color: var(--green); flex: none; }

/* result card mock in the hero */
.demo {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow); overflow: hidden;
}
.demo__bar {
  display: flex; align-items: center; gap: 7px;
  padding: 13px 18px; border-bottom: 1px solid var(--line-soft); background: var(--paper);
}
.demo__dot { width: 9px; height: 9px; border-radius: 50%; background: var(--line); }
.demo__bar span { margin-left: auto; font-family: var(--mono); font-size: .72rem; color: var(--muted); }
.demo__body { padding: 22px 22px 24px; }
.demo__addr {
  display: flex; align-items: center; gap: 10px; padding: 12px 15px;
  border: 1.5px solid var(--line); border-radius: 12px; background: var(--paper);
  font-family: var(--mono); font-size: .9rem; color: var(--ink); margin-bottom: 18px;
}
.demo__addr svg { width: 16px; height: 16px; color: var(--muted); flex: none; }
.demo__row {
  display: flex; align-items: center; gap: 11px; padding: 9px 0;
  border-bottom: 1px dashed var(--line-soft); font-size: .875rem;
}
.demo__row:last-child { border-bottom: 0; }
.demo__row b { color: var(--ink); font-weight: 700; min-width: 92px; }
.demo__row span { margin-left: auto; font-weight: 700; font-size: .8rem; }
.pill-ok   { color: var(--green-700); background: var(--green-100); padding: 3px 11px; border-radius: var(--pill); }
.pill-warn { color: var(--amber);     background: var(--amber-100); padding: 3px 11px; border-radius: var(--pill); }
.pill-info { color: var(--blue);      background: var(--blue-100);  padding: 3px 11px; border-radius: var(--pill); }
.demo__foot {
  margin-top: 16px; padding-top: 15px; border-top: 1px solid var(--line-soft);
  font-size: .78rem; color: var(--muted);
}

/* ---------- grids and cards ---------- */
.grid { display: grid; gap: 20px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 26px;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: var(--green-200); }
.card h3 { margin-bottom: 8px; }
.card p { font-size: .925rem; margin: 0; }
.icon {
  width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center;
  margin-bottom: 18px; background: var(--green-100); color: var(--green-700);
  transition: background .3s var(--ease), color .3s var(--ease), transform .3s var(--ease);
}
.icon svg { width: 21px; height: 21px; }
.icon--blue { background: var(--blue-100); color: var(--blue); }
.icon--amber { background: var(--amber-100); color: var(--amber); }
.icon--ink { background: var(--paper-2); color: var(--ink); }
.card:hover .icon { background: var(--ink); color: #fff; transform: rotate(-6deg) scale(1.05); }
.section--ink .card { background: rgba(255,255,255,.05); border-color: rgba(255,255,255,.12); }
.section--ink .card p { color: rgba(255,255,255,.72); }
.section--ink .icon { background: rgba(16,163,127,.2); color: #7FE0C4; }
.section--ink .card:hover { border-color: rgba(16,163,127,.4); }
.section--ink .card:hover .icon { background: var(--green); color: #fff; }

.checks li {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 9px 0; font-size: .96rem; font-weight: 600; color: #3F4E66;
}
.checks li svg {
  width: 20px; height: 20px; flex: none; padding: 4px; border-radius: 50%;
  background: var(--green-100); color: var(--green-700); margin-top: 3px;
}
.section--ink .checks li { color: rgba(255,255,255,.84); }
.section--ink .checks li svg { background: rgba(16,163,127,.22); color: #7FE0C4; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 58px; align-items: center; }
.split--rev .split__media { order: -1; }

/* ---------- comparison ---------- */
.vs {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  overflow: hidden; box-shadow: var(--shadow-sm);
}
.vs__row {
  display: grid; grid-template-columns: 1fr 116px 116px; align-items: center;
  padding: 15px 24px; border-bottom: 1px solid var(--line-soft); font-size: .93rem;
}
.vs__row:last-child { border-bottom: 0; }
.vs__row--head {
  background: var(--paper); font-weight: 800; color: var(--ink); font-size: .78rem;
  letter-spacing: .1em; text-transform: uppercase;
}
.vs__row--head div:not(:first-child) { text-align: center; }
.vs__row b { color: var(--ink); font-weight: 600; }
.vs__mark { text-align: center; font-weight: 800; }
.vs__yes { color: var(--green); }
.vs__no  { color: #C2CBD8; }
.vs__mark svg { width: 19px; height: 19px; display: inline-block; }

/* ---------- pricing ---------- */
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: start; }
.plan {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 30px 26px; display: flex; flex-direction: column; position: relative;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.plan:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.plan--featured { border-color: var(--green); box-shadow: 0 12px 34px rgba(16,163,127,.16); }
.plan__tag {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  font-size: .68rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase;
  color: #fff; background: var(--green); padding: 5px 14px; border-radius: var(--pill);
}
.plan h3 { font-size: 1.18rem; margin-bottom: 4px; }
.plan__price {
  font-size: 2.4rem; font-weight: 800; color: var(--ink); letter-spacing: -.045em;
  line-height: 1.1; margin: 14px 0 2px;
}
.plan__price em { font-style: normal; font-size: .95rem; font-weight: 600; color: var(--muted); letter-spacing: 0; }
.plan__vol { font-size: .87rem; color: var(--muted); font-weight: 600; margin-bottom: 20px; }
.plan ul { border-top: 1px solid var(--line-soft); padding-top: 17px; margin-bottom: 22px; }
.plan ul li {
  display: flex; align-items: flex-start; gap: 9px;
  font-size: .875rem; font-weight: 600; color: #4B5A70; padding: 5px 0;
}
.plan ul li svg { width: 15px; height: 15px; color: var(--green); flex: none; margin-top: 4px; }
.plan .btn { margin-top: auto; }

/* ---------- faq ---------- */
.faq { max-width: 800px; margin-inline: auto; }
.faq details {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 19px 23px; margin-bottom: 11px;
}
.faq summary {
  cursor: pointer; font-weight: 700; color: var(--ink); font-size: .99rem;
  list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.3rem; color: var(--green); font-weight: 700; flex: none; line-height: 1; }
.faq details[open] summary::after { content: "\2212"; }
.faq details p { margin: 13px 0 0; font-size: .93rem; }

/* ---------- form ---------- */
.form-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 34px; box-shadow: var(--shadow-sm); max-width: 620px; margin-inline: auto;
  position: relative;
}
.field { margin-bottom: 16px; }
.field label { display: block; font-size: .78rem; font-weight: 700; color: var(--ink); margin-bottom: 6px; }
.field label i { color: var(--green); font-style: normal; }
.field input, .field select, .field textarea {
  width: 100%; padding: 12px 15px; font: inherit; font-size: .93rem; color: var(--ink);
  border: 1.5px solid var(--line); border-radius: 12px; background: #fff;
  transition: border-color .2s, box-shadow .2s;
}
.field textarea { min-height: 104px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 0; border-color: var(--green); box-shadow: 0 0 0 4px rgba(16,163,127,.13);
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-note { font-size: .8rem; color: var(--muted); text-align: center; margin: 14px 0 0; }
.form-error {
  display: none; align-items: center; gap: 9px; margin-top: 14px;
  padding: 12px 16px; border-radius: 12px; font-size: .87rem; font-weight: 600;
  background: #FDECEC; color: #A33A3A; border: 1px solid #F5C9C9;
}
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form-thanks {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 50px 38px; text-align: center; max-width: 620px; margin-inline: auto;
  box-shadow: var(--shadow); animation: thanksIn .45s var(--ease) both;
}
.form-thanks__tick {
  display: grid; place-items: center; width: 58px; height: 58px; margin: 0 auto 20px;
  border-radius: 50%; background: var(--green-100); color: var(--green-700);
}
.form-thanks__tick svg { width: 26px; height: 26px; }
.form-thanks h3 { font-size: 1.5rem; margin-bottom: 10px; }
.form-thanks p { font-size: .98rem; max-width: 420px; margin: 0 auto 22px; }
@keyframes thanksIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }

/* ---------- footer ---------- */
.site-footer { background: var(--ink); color: rgba(255,255,255,.6); padding: 52px 0 0; font-size: .89rem; }
.footer__top { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 40px; padding-bottom: 34px; }
.site-footer .brand__name { color: #fff; }
.site-footer .brand { margin-bottom: 16px; }
.footer__about { max-width: 320px; color: rgba(255,255,255,.58); }
.site-footer h4 {
  color: #fff; font-size: .72rem; font-weight: 700; letter-spacing: .15em;
  text-transform: uppercase; margin-bottom: 14px;
}
.site-footer li { padding: 5px 0; }
.site-footer li a { color: rgba(255,255,255,.6); transition: color .2s; }
.site-footer li a:hover { color: var(--green); }
.footer__bar {
  border-top: 1px solid rgba(255,255,255,.09); padding: 20px 0;
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  font-size: .8rem; color: rgba(255,255,255,.42);
}

/* ---------- reveal ---------- */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .65s var(--ease), transform .65s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .form-thanks { animation: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 1000px) {
  .hero__inner, .split { grid-template-columns: 1fr; gap: 40px; }
  .split--rev .split__media { order: 0; }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .plans { grid-template-columns: 1fr; max-width: 460px; margin-inline: auto; }
  .footer__top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 820px) {
  .nav__links { display: none; }
  .nav__toggle { display: flex; }
  .nav.is-open .nav__links {
    display: flex; flex-direction: column; align-items: stretch; gap: 2px;
    position: absolute; top: var(--nav-h); left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    padding: 14px 24px 18px; box-shadow: var(--shadow);
  }
  .nav.is-open .nav__links a { padding: 12px 14px; }
  .grid--3, .grid--2 { grid-template-columns: 1fr; }
  .section { padding: 68px 0; }
  .vs__row { grid-template-columns: 1fr 74px 74px; padding: 13px 16px; font-size: .87rem; }
}
@media (max-width: 540px) {
  .grid--4 { grid-template-columns: 1fr; }
  .field-row { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr; }
  .form-card { padding: 24px; }
  .btn { width: 100%; }
  .hero__actions { flex-direction: column; }
}