/* =============================================================
   Abill Group — premium site stylesheet
   Brand: vermilion #EA4924 · charcoal #2E3440 · warm off-white
   ============================================================= */

/* ---------- Design tokens ---------- */
:root {
  --vermilion: #EA4924;
  --vermilion-600: #d23d1b;
  --vermilion-050: #fdeee9;
  --ink: #222831;
  --charcoal: #2E3440;
  --slate: #3A4250;
  --muted: #5b6470;
  --line: #e7e3dc;
  --paper: #f7f6f3;
  --paper-2: #efece6;
  --white: #ffffff;

  --maxw: 1180px;
  --gut: clamp(1.25rem, 4vw, 3rem);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px rgba(34, 40, 49, .06), 0 4px 14px rgba(34, 40, 49, .06);
  --shadow-md: 0 10px 30px rgba(34, 40, 49, .10);
  --shadow-lg: 0 24px 60px rgba(34, 40, 49, .16);

  --font-display: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;

  --ease: cubic-bezier(.22, .61, .36, 1);
  --t-fast: .18s var(--ease);
  --t-med: .4s var(--ease);
}

/* ---------- Reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: clamp(1rem, .96rem + .2vw, 1.075rem);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--vermilion-600); text-decoration: none; }
a:hover { color: var(--vermilion); }
h1, h2, h3, h4 { font-family: var(--font-display); color: var(--ink); line-height: 1.08; font-weight: 700; letter-spacing: -.02em; margin: 0 0 .5em; }
h2 { font-size: clamp(1.8rem, 1.3rem + 2.2vw, 2.9rem); }
h3 { font-size: clamp(1.2rem, 1rem + .8vw, 1.5rem); }
p { margin: 0 0 1rem; }
ul { margin: 0; padding: 0; }

/* ---------- Accessibility helpers ---------- */
:focus-visible { outline: 3px solid var(--vermilion); outline-offset: 3px; border-radius: 4px; }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: 1rem; top: -100px; z-index: 200;
  background: var(--ink); color: #fff; padding: .75rem 1.25rem; border-radius: 8px; font-weight: 600;
  transition: top var(--t-fast);
}
.skip-link:focus { top: 1rem; color: #fff; }

/* ---------- Layout ---------- */
.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gut); }
.section { padding-block: clamp(3.5rem, 6vw, 6.5rem); position: relative; }
.section--paper2 { background: var(--paper-2); }
.section--ink { background: var(--charcoal); color: #e9ecf1; }
.section--ink h2, .section--ink h3 { color: #fff; }
.eyebrow {
  display: inline-flex; align-items: center; gap: .55rem;
  font-family: var(--font-display); font-weight: 600; font-size: .8rem;
  letter-spacing: .16em; text-transform: uppercase; color: var(--vermilion-600);
  margin-bottom: 1rem;
}
.eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--vermilion); display: inline-block; }
.section--ink .eyebrow { color: #ff7a5c; }
.lead { font-size: clamp(1.05rem, 1rem + .4vw, 1.25rem); color: var(--muted); max-width: 60ch; }
.section--ink .lead { color: #c4ccd6; }

/* ---------- Buttons ---------- */
.btn {
  --bg: var(--vermilion); --fg: #fff;
  display: inline-flex; align-items: center; justify-content: center; gap: .55rem;
  min-height: 48px; padding: .85rem 1.6rem;
  font-family: var(--font-display); font-weight: 600; font-size: 1rem;
  background: var(--bg); color: var(--fg); border: 2px solid var(--bg); border-radius: 999px;
  cursor: pointer; transition: transform var(--t-fast), box-shadow var(--t-fast), background var(--t-fast);
  box-shadow: var(--shadow-sm);
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); color: #fff; background: var(--vermilion-600); border-color: var(--vermilion-600); }
.btn:active { transform: translateY(0); }
.btn--ghost { --bg: transparent; --fg: var(--ink); border-color: var(--line); box-shadow: none; }
.btn--ghost:hover { background: var(--ink); border-color: var(--ink); color: #fff; }
.btn--light { --bg: #fff; --fg: var(--ink); border-color: #fff; }
.btn--light:hover { background: #f0f0f0; border-color: #f0f0f0; color: var(--ink); }
.btn .arrow { transition: transform var(--t-fast); }
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(247, 246, 243, .82); backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid transparent; transition: border-color var(--t-fast), box-shadow var(--t-fast), background var(--t-fast);
}
.site-header.is-scrolled { border-color: var(--line); box-shadow: var(--shadow-sm); }
.site-header__inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 72px; }
.brand { display: inline-flex; align-items: center; }
.brand img { height: 54px; width: auto; }
@media (max-width: 480px) { .brand img { height: 46px; } }
.nav { display: flex; align-items: center; gap: .35rem; }
.nav a {
  color: var(--ink); font-weight: 500; padding: .5rem .85rem; border-radius: 8px;
  font-size: .98rem; transition: background var(--t-fast), color var(--t-fast);
}
.nav a:hover { background: var(--paper-2); color: var(--ink); }
.header-cta { display: inline-flex; align-items: center; gap: 1rem; }
.nav-toggle {
  display: none; width: 46px; height: 46px; align-items: center; justify-content: center;
  background: transparent; border: 1px solid var(--line); border-radius: 10px; cursor: pointer;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; display: block; width: 22px; height: 2px; background: var(--ink); position: relative; transition: var(--t-fast);
}
.nav-toggle span::before { position: absolute; top: -7px; }
.nav-toggle span::after { position: absolute; top: 7px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { top: 0; transform: rotate(-45deg); }

@media (max-width: 880px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    position: fixed; inset: 72px 0 auto 0; flex-direction: column; align-items: stretch; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--line); padding: .5rem var(--gut) 1.25rem;
    box-shadow: var(--shadow-md); transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: opacity var(--t-fast), transform var(--t-fast);
  }
  .nav.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav a { padding: .85rem .5rem; border-bottom: 1px solid var(--line); border-radius: 0; }
  .header-cta .btn { display: none; }
}

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; background: radial-gradient(120% 90% at 80% -10%, #fff 0%, var(--paper) 45%, var(--paper-2) 100%); }
.hero__canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
.hero__fallback {
  position: absolute; inset: 0; z-index: 0; display: none;
  background:
    radial-gradient(60% 60% at 78% 28%, rgba(234, 73, 36, .16), transparent 70%),
    radial-gradient(50% 50% at 20% 80%, rgba(46, 52, 64, .10), transparent 70%);
}
.hero__inner { position: relative; z-index: 2; padding-block: clamp(4rem, 10vw, 8rem); max-width: 760px; }
.hero h1 {
  font-size: clamp(2.6rem, 1.6rem + 5vw, 5rem); line-height: .98; margin-bottom: 1.1rem;
}
.hero h1 .accent { color: var(--vermilion); }
.hero__sub { font-size: clamp(1.1rem, 1rem + .6vw, 1.4rem); color: var(--slate); max-width: 52ch; margin-bottom: 2rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; }
.hero__scroll {
  position: absolute; left: var(--gut); bottom: 1.5rem; z-index: 2;
  font-size: .8rem; letter-spacing: .14em; text-transform: uppercase; color: var(--muted);
  display: inline-flex; align-items: center; gap: .6rem;
}
.hero__scroll::before { content: ""; width: 1px; height: 34px; background: var(--muted); animation: scrollpulse 2s var(--ease) infinite; }
@keyframes scrollpulse { 0%,100% { opacity: .3; transform: scaleY(.6); } 50% { opacity: 1; transform: scaleY(1); } }

/* ---------- Trust strip ---------- */
.trust { background: var(--charcoal); color: #fff; }
.trust__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(1rem, 3vw, 2.5rem); padding-block: clamp(2.25rem, 4vw, 3.25rem); }
.stat { text-align: center; }
.stat__num { font-family: var(--font-display); font-weight: 700; font-size: clamp(1.9rem, 1.4rem + 2vw, 3rem); color: #fff; line-height: 1; }
.stat__num .unit { color: var(--vermilion); }
.stat__label { color: #aeb6c2; font-size: .92rem; margin-top: .5rem; }
.trust__note { text-align: center; color: #aeb6c2; padding-bottom: 2.25rem; font-size: .95rem; }
.trust__note strong { color: #fff; }
@media (max-width: 680px) { .trust__grid { grid-template-columns: repeat(2, 1fr); } }

/* ---------- About ---------- */
.about__grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(2rem, 5vw, 4.5rem); align-items: center; }
.about__media { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); aspect-ratio: 4/3; }
.about__media img { width: 100%; height: 100%; object-fit: cover; }
.about__badge {
  position: absolute; left: 1.25rem; bottom: 1.25rem; background: #fff; border-radius: 12px;
  padding: .85rem 1.15rem; box-shadow: var(--shadow-md); font-family: var(--font-display); font-weight: 700;
}
.about__badge span { display: block; color: var(--vermilion); font-size: 1.6rem; }
.about__badge small { color: var(--muted); font-weight: 500; }
.entities { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1.25rem; }
.chip {
  display: inline-flex; align-items: center; gap: .5rem; background: var(--white); border: 1px solid var(--line);
  padding: .5rem .9rem; border-radius: 999px; font-weight: 600; font-size: .9rem; box-shadow: var(--shadow-sm);
}
.chip::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--vermilion); }
@media (max-width: 820px) { .about__grid { grid-template-columns: 1fr; } }

/* ---------- Services ---------- */
.services__head { display: flex; justify-content: space-between; align-items: end; gap: 2rem; flex-wrap: wrap; margin-bottom: 2.5rem; }
.services__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.service {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.75rem;
  box-shadow: var(--shadow-sm); transition: transform var(--t-med), box-shadow var(--t-med), border-color var(--t-med);
  display: flex; flex-direction: column;
}
.service:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.service__icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 1.1rem;
  background: var(--vermilion-050); color: var(--vermilion-600);
}
.service__icon svg { width: 26px; height: 26px; }
.service h3 { margin-bottom: .5rem; }
.service p { color: var(--muted); margin-bottom: 1rem; }
.disclosure { margin-top: auto; }
.disclosure__btn {
  display: inline-flex; align-items: center; gap: .5rem; background: none; border: none; cursor: pointer;
  font-family: var(--font-display); font-weight: 600; color: var(--vermilion-600); padding: .4rem 0; font-size: .95rem; min-height: 32px;
}
.disclosure__btn .chev { transition: transform var(--t-fast); }
.disclosure__btn[aria-expanded="true"] .chev { transform: rotate(180deg); }
.disclosure__panel {
  display: grid; grid-template-rows: 0fr; transition: grid-template-rows var(--t-med);
}
.disclosure__panel > div { overflow: hidden; }
.disclosure__panel.is-open { grid-template-rows: 1fr; }
.disclosure__panel ul { list-style: none; margin-top: .85rem; display: grid; gap: .5rem; }
.disclosure__panel li { position: relative; padding-left: 1.4rem; color: var(--slate); font-size: .95rem; }
.disclosure__panel li::before { content: ""; position: absolute; left: 0; top: .55em; width: 7px; height: 7px; background: var(--vermilion); border-radius: 2px; transform: rotate(45deg); }
@media (max-width: 920px) { .services__grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .services__grid { grid-template-columns: 1fr; } }

/* ---------- Why / Mission ---------- */
.why__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem 2.5rem; margin-top: 2.5rem; }
.feature { display: flex; gap: 1rem; align-items: flex-start; }
.feature__num { font-family: var(--font-display); font-weight: 700; color: var(--vermilion); font-size: 1.05rem; min-width: 2.4rem; padding-top: .15rem; }
.feature h3 { font-size: 1.15rem; margin-bottom: .35rem; }
.feature p { color: #c4ccd6; margin: 0; }
@media (max-width: 760px) { .why__grid { grid-template-columns: 1fr; } }

/* ---------- Network ---------- */
.network__grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem,5vw,4rem); align-items: center; }
.network__visual { aspect-ratio: 1; border-radius: 50%; position: relative; background:
  radial-gradient(circle at 35% 30%, rgba(234,73,36,.18), transparent 60%),
  radial-gradient(circle at 70% 75%, rgba(46,52,64,.12), transparent 55%), var(--paper-2);
  box-shadow: inset 0 0 0 1px var(--line), var(--shadow-md); overflow: hidden; }
.network__visual::after { content: ""; position: absolute; inset: 12%; border-radius: 50%; border: 1px dashed rgba(58,66,80,.35); }
.network__visual img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .9; mix-blend-mode: multiply; }
@media (max-width: 820px) { .network__grid { grid-template-columns: 1fr; } .network__visual { max-width: 420px; margin-inline: auto; } }

/* ---------- Contact ---------- */
.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 4rem); }
.contact__info { display: grid; gap: 1.25rem; align-content: start; }
.info-card { display: flex; gap: 1rem; align-items: flex-start; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 1.1rem 1.25rem; box-shadow: var(--shadow-sm); }
.info-card .ic { width: 44px; height: 44px; border-radius: 12px; background: var(--vermilion-050); color: var(--vermilion-600); display: grid; place-items: center; flex: none; }
.info-card .ic svg { width: 22px; height: 22px; }
.info-card h4 { margin: 0 0 .25rem; font-size: 1rem; }
.info-card p, .info-card a { margin: 0; color: var(--muted); font-size: .96rem; }
.info-card a:hover { color: var(--vermilion); }

.form { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1.5rem, 3vw, 2.25rem); box-shadow: var(--shadow-md); }
.field { margin-bottom: 1.15rem; }
.field label { display: block; font-weight: 600; font-size: .92rem; margin-bottom: .4rem; color: var(--ink); }
.field input, .field textarea {
  width: 100%; font: inherit; color: var(--ink); background: var(--paper); border: 1.5px solid var(--line);
  border-radius: 10px; padding: .8rem .95rem; transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--vermilion); box-shadow: 0 0 0 3px var(--vermilion-050); }
.field textarea { min-height: 120px; resize: vertical; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form__status { margin-top: 1rem; font-weight: 600; min-height: 1.2em; }
.form__status.is-ok { color: #15803d; }
.form__status.is-err { color: var(--vermilion-600); }
@media (max-width: 820px) { .contact__grid { grid-template-columns: 1fr; } }

/* ---------- Footer CTA band ---------- */
.footer-cta {
  background: linear-gradient(120deg, var(--vermilion) 0%, var(--vermilion-600) 100%);
  color: #fff;
}
.footer-cta__inner {
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem 2rem;
  flex-wrap: wrap; padding-block: clamp(2rem, 4vw, 2.75rem);
}
.footer-cta h2 { color: #fff; margin: 0; font-size: clamp(1.5rem, 1.2rem + 1.4vw, 2.1rem); }
.footer-cta p { color: rgba(255,255,255,.88); margin: .35rem 0 0; max-width: 46ch; }
.footer-cta .btn { background: #fff; color: var(--ink); border-color: #fff; }
.footer-cta .btn:hover { background: var(--ink); color: #fff; border-color: var(--ink); }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: #aeb6c2; padding-block: clamp(3rem, 5vw, 4.5rem) 1.5rem; }
.footer__top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.3fr; gap: 2.5rem; align-items: start; }
.footer__logo-chip {
  display: inline-flex; background: #fff; border-radius: 12px; padding: .7rem 1rem; margin-bottom: 1.15rem;
  box-shadow: 0 6px 20px rgba(0,0,0,.25);
}
.footer__logo-chip img { height: 58px; width: auto; display: block; }
.footer__brand p { color: #8b94a1; max-width: 40ch; }
.footer h4 { color: #fff; font-size: .85rem; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 1rem; }
.footer ul { list-style: none; display: grid; gap: .6rem; }
.footer a { color: #aeb6c2; }
.footer a:hover { color: #fff; }
.footer__contact { display: grid; gap: .85rem; }
.footer__contact li { display: flex; gap: .65rem; align-items: flex-start; color: #aeb6c2; font-size: .95rem; }
.footer__contact svg { width: 18px; height: 18px; color: var(--vermilion); flex: none; margin-top: .15rem; }
.footer__contact a { color: #aeb6c2; }
.socials { display: flex; gap: .6rem; margin-top: 1.25rem; }
.socials a { width: 40px; height: 40px; border-radius: 50%; border: 1px solid #3a4250; display: grid; place-items: center; color: #c4ccd6; transition: var(--t-fast); }
.socials a:hover { background: var(--vermilion); border-color: var(--vermilion); color: #fff; }
.socials svg { width: 18px; height: 18px; }
.footer__bottom { border-top: 1px solid #2b313b; margin-top: 3rem; padding-top: 1.5rem; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-size: .88rem; }
@media (max-width: 920px) { .footer__top { grid-template-columns: 1fr 1fr; gap: 2rem; } }
@media (max-width: 560px) { .footer__top { grid-template-columns: 1fr; gap: 1.75rem; } }

/* ---------- Welcome modal ---------- */
.welcome { position: fixed; inset: 0; z-index: 300; }
.welcome[hidden] { display: none; }
.welcome:not(.is-open) { pointer-events: none; }
.welcome__overlay {
  position: absolute; inset: 0; background: rgba(34, 40, 49, .62); backdrop-filter: blur(4px);
  opacity: 0; transition: opacity var(--t-med);
}
.welcome.is-open .welcome__overlay { opacity: 1; }
.welcome__dialog {
  position: relative; z-index: 1; width: min(540px, calc(100% - 2rem));
  margin: 10vh auto 0; background: var(--white); border-radius: var(--radius);
  box-shadow: var(--shadow-lg); padding: clamp(1.75rem, 4vw, 2.75rem); text-align: center;
  transform: translateY(16px) scale(.98); opacity: 0; transition: transform var(--t-med), opacity var(--t-med);
}
.welcome.is-open .welcome__dialog { transform: none; opacity: 1; }
.welcome__logo {
  display: inline-flex; background: var(--paper); border: 1px solid var(--line); border-radius: 14px;
  padding: 1rem 1.4rem; margin-bottom: 1.25rem;
}
.welcome__logo img { height: 70px; width: auto; }
.welcome__dialog h2 { font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2rem); margin-bottom: .6rem; }
.welcome__dialog h2 .accent { color: var(--vermilion); }
.welcome__dialog p { color: var(--muted); margin-bottom: 1.6rem; }
.welcome__actions { display: flex; gap: .75rem; justify-content: center; flex-wrap: wrap; }
.welcome__close {
  position: absolute; top: .75rem; right: .75rem; width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--white); color: var(--slate); cursor: pointer;
  font-size: 1.3rem; line-height: 1; display: grid; place-items: center; transition: var(--t-fast);
}
.welcome__close:hover { background: var(--ink); color: #fff; border-color: var(--ink); }
@media (prefers-reduced-motion: reduce) {
  .welcome__overlay, .welcome__dialog { transition: none; }
}

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .08s; }
.reveal[data-delay="2"] { transition-delay: .16s; }
.reveal[data-delay="3"] { transition-delay: .24s; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
  .hero__canvas { display: none; }
  .hero__fallback { display: block; }
  .hero__scroll::before { animation: none; }
}