/* ============================================================
   Arc Consulting — Stylesheet
   ============================================================ */
:root {
  --navy-900: #0e2138;
  --navy-800: #14304f;
  --navy-700: #1f3a5f;
  --navy-600: #2b507e;
  --blue-500: #3b6ea5;
  --blue-400: #5b8fc7;
  --blue-200: #b9d2ea;
  --accent: #e11d2a;       /* brand red */
  --accent-dark: #b3121d;
  --accent-soft: #fdecec;
  --ink: #15243a;
  --muted: #5a6b80;
  --muted-light: #8ca0b8;
  --bg: #ffffff;
  --bg-soft: #f4f7fb;
  --bg-alt: #eef3f9;
  --line: #e2e9f1;
  --white: #ffffff;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(20, 48, 79, 0.06);
  --shadow: 0 14px 40px rgba(20, 48, 79, 0.10);
  --shadow-lg: 0 30px 70px rgba(14, 33, 56, 0.18);
  --maxw: 1180px;
  --sans: "Plus Jakarta Sans", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --serif: "Fraunces", Georgia, serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

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

/* ---------- Typography ---------- */
h1, h2, h3, h4 { font-family: var(--serif); line-height: 1.12; letter-spacing: -0.01em; font-weight: 600; color: var(--navy-900); }
h1 { font-size: clamp(2.4rem, 5.4vw, 4rem); font-weight: 600; }
h2 { font-size: clamp(1.9rem, 3.6vw, 2.85rem); }
h3 { font-size: 1.25rem; }
.accent-text { color: var(--accent-dark); font-style: italic; }

.kicker {
  display: inline-block; font-family: var(--sans); font-weight: 700;
  font-size: 0.78rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--blue-500); margin-bottom: 14px;
}
.kicker.light { color: var(--accent); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--sans); font-weight: 600; font-size: 0.98rem;
  padding: 14px 26px; border-radius: 999px; border: 1.5px solid transparent;
  cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
  white-space: nowrap;
}
.btn-sm { padding: 9px 18px; font-size: 0.9rem; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 8px 22px rgba(225, 29, 42, 0.32); }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(225, 29, 42, 0.42); }
.btn-ghost { color: var(--navy-800); border-color: var(--line); background: var(--white); }
.btn-ghost:hover { border-color: var(--blue-400); color: var(--blue-500); transform: translateY(-2px); }
.btn-block { width: 100%; }

/* ---------- Header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease, box-shadow .3s ease, background .3s ease;
}
.site-header.scrolled { border-bottom-color: var(--line); box-shadow: var(--shadow-sm); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }

.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand-mark { flex-shrink: 0; }
.brand-text { font-family: var(--serif); font-size: 1.35rem; font-weight: 500; color: var(--navy-900); letter-spacing: -0.02em; }
.brand-text strong { font-weight: 600; color: var(--blue-500); }
.brand-light .brand-text { color: #fff; }
.brand-light .brand-text strong { color: var(--blue-200); }

.nav { display: flex; align-items: center; gap: 30px; }
.nav a { font-size: 0.96rem; font-weight: 500; color: var(--navy-800); transition: color .2s ease; }
.nav a:not(.btn):hover { color: var(--blue-500); }
.nav a.nav-cta { color: #fff; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--navy-800); border-radius: 2px; transition: .3s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 150px 0 90px; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(900px 520px at 78% -8%, rgba(91, 143, 199, 0.22), transparent 60%),
    radial-gradient(700px 480px at 8% 16%, rgba(225, 29, 42, 0.10), transparent 55%),
    linear-gradient(180deg, var(--bg-soft), var(--bg) 70%);
}
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 46px 46px; opacity: .35;
  -webkit-mask-image: radial-gradient(circle at 70% 10%, #000, transparent 70%);
  mask-image: radial-gradient(circle at 70% 10%, #000, transparent 70%);
}
.hero-inner { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 56px; align-items: center; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--white); border: 1px solid var(--line); box-shadow: var(--shadow-sm);
  padding: 7px 16px; border-radius: 999px; font-size: 0.82rem; font-weight: 600;
  color: var(--navy-700); margin-bottom: 22px;
}
.hero h1 { margin-bottom: 22px; }
.lead { font-size: clamp(1.05rem, 1.5vw, 1.22rem); color: var(--muted); max-width: 560px; margin-bottom: 32px; }
.lead strong { color: var(--navy-800); font-weight: 600; }

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 44px; }

.hero-stats { display: flex; gap: 38px; flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; }
.stat-num { font-family: var(--serif); font-size: 1.9rem; font-weight: 600; color: var(--navy-900); }
.stat-label { font-size: 0.85rem; color: var(--muted); }

/* Hero card */
.hero-card { display: flex; justify-content: center; }
.hcard {
  width: 100%; max-width: 380px; background: var(--white);
  border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-lg);
  padding: 26px; position: relative;
}
.hcard::before {
  content: ""; position: absolute; inset: -1px; border-radius: var(--radius); z-index: -1;
  background: linear-gradient(160deg, rgba(91,143,199,.4), rgba(232,163,61,.3)); filter: blur(20px); opacity: .4;
}
.hcard-row { display: flex; align-items: center; gap: 8px; font-size: 0.82rem; font-weight: 600; color: var(--muted); }
.hcard-head { margin-bottom: 22px; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--muted-light); }
.dot-live { background: #2bb673; box-shadow: 0 0 0 0 rgba(43,182,115,.5); animation: pulse 2s infinite; }
@keyframes pulse { 0%{box-shadow:0 0 0 0 rgba(43,182,115,.5);} 70%{box-shadow:0 0 0 8px rgba(43,182,115,0);} 100%{box-shadow:0 0 0 0 rgba(43,182,115,0);} }

.hcard-bar { position: relative; margin-bottom: 20px; }
.hcard-bar label { display: flex; justify-content: space-between; font-size: 0.84rem; color: var(--muted); margin-bottom: 7px; }
.hcard-bar label b { color: var(--navy-800); }
.hcard-bar span { display: block; height: 8px; border-radius: 999px; background: var(--bg-alt); position: relative; overflow: hidden; }
.hcard-bar span::after {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: var(--w);
  background: linear-gradient(90deg, var(--blue-500), var(--accent)); border-radius: 999px;
  transform: scaleX(0); transform-origin: left; transition: transform 1.1s cubic-bezier(.2,.8,.2,1);
}
.hcard.in span::after { transform: scaleX(1); }

.hcard-foot { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 26px; padding-top: 20px; border-top: 1px solid var(--line); }
.hcard-foot div { text-align: center; }
.hcard-foot b { display: block; font-family: var(--serif); font-size: 1.15rem; color: var(--blue-500); }
.hcard-foot span { font-size: 0.72rem; color: var(--muted); }

/* ---------- Trust strip ---------- */
.trust { background: var(--navy-900); color: #cdddf0; padding: 26px 0; }
.trust-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.trust p { font-size: 0.9rem; color: var(--blue-200); font-weight: 500; }
.trust-tags { display: flex; gap: 10px; flex-wrap: wrap; }
.trust-tags span {
  font-size: 0.82rem; font-weight: 600; padding: 6px 14px; border-radius: 999px;
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12); color: #e8f1fb;
}

/* ---------- Sections ---------- */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-soft); }
.section-dark { background: linear-gradient(180deg, var(--navy-900), var(--navy-800)); color: #d6e2f0; }
.section-head { max-width: 680px; margin: 0 auto 56px; text-align: center; }
.section-dark .section-head h2 { color: #fff; }
.section-head p { color: var(--muted); font-size: 1.08rem; margin-top: 12px; }
.section-dark .section-head p { color: var(--blue-200); }

/* ---------- Services (4) ---------- */
.cards-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.svc {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px; transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  position: relative; overflow: hidden;
}
.svc::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--blue-500), var(--accent)); transform: scaleX(0); transform-origin: left; transition: transform .3s ease;
}
.svc:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.svc:hover::before { transform: scaleX(1); }
.svc-icon {
  width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center;
  background: linear-gradient(150deg, var(--navy-700), var(--blue-500)); color: #fff; margin-bottom: 20px;
}
.svc h3 { margin-bottom: 10px; }
.svc > p { color: var(--muted); font-size: 0.96rem; margin-bottom: 16px; }
.svc-list { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.svc-list li { position: relative; padding-left: 22px; font-size: 0.9rem; color: var(--navy-800); }
.svc-list li::before {
  content: ""; position: absolute; left: 0; top: 8px; width: 11px; height: 6px;
  border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg);
}

/* ---------- Why Arc ---------- */
.why-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 60px; align-items: start; }
.why-copy { position: sticky; top: 110px; }
.why-copy h2 { margin: 6px 0 14px; }
.why-copy p { color: var(--muted); margin-bottom: 26px; }
.why-list { display: flex; flex-direction: column; gap: 18px; }
.why-item {
  display: flex; gap: 22px; background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px 30px; box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease;
}
.why-item:hover { transform: translateX(6px); box-shadow: var(--shadow); }
.why-num {
  font-family: var(--serif); font-size: 2rem; font-weight: 600; line-height: 1;
  color: transparent; -webkit-text-stroke: 1.5px var(--blue-400); flex-shrink: 0;
}
.why-item h3 { margin-bottom: 6px; }
.why-item p { color: var(--muted); font-size: 0.96rem; }

/* ---------- HR Framework (6) ---------- */
.cards-6 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.pillar {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; transition: transform .25s ease, box-shadow .25s ease;
  border-left: 4px solid var(--blue-400);
}
.pillar:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-left-color: var(--accent); }
.pillar h3 { margin-bottom: 8px; font-size: 1.15rem; }
.pillar p { color: var(--muted); font-size: 0.94rem; }

/* ---------- Offerings (dark) ---------- */
.offer-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.offer {
  background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.10);
  border-radius: var(--radius); padding: 26px; transition: background .25s ease, transform .25s ease, border-color .25s ease;
}
.offer:hover { background: rgba(255,255,255,.08); transform: translateY(-4px); border-color: rgba(232,163,61,.4); }
.offer h3 { color: #fff; margin-bottom: 8px; font-size: 1.12rem; }
.offer p { color: var(--blue-200); font-size: 0.92rem; }

/* ---------- Team ---------- */
.team-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; max-width: 940px; margin: 0 auto; }
.member {
  display: flex; gap: 22px; background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease;
}
.member:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.avatar {
  width: 72px; height: 72px; border-radius: 50%; flex-shrink: 0; display: grid; place-items: center;
  font-family: var(--serif); font-size: 1.5rem; font-weight: 600; color: #fff;
  background: linear-gradient(150deg, var(--navy-700), var(--blue-500));
}
.avatar-2 { background: linear-gradient(150deg, var(--accent-dark), var(--accent)); color: #fff; }
.member-body h3 { margin-bottom: 2px; }
.role { display: inline-block; font-size: 0.82rem; font-weight: 600; color: var(--blue-500); margin-bottom: 12px; }
.member-body p { color: var(--muted); font-size: 0.94rem; margin-bottom: 14px; }
.member-contact { display: flex; flex-direction: column; gap: 4px; }
.member-contact a { font-size: 0.9rem; font-weight: 500; color: var(--navy-800); transition: color .2s ease; }
.member-contact a:hover { color: var(--accent-dark); }

/* ---------- Contact ---------- */
.contact { background: linear-gradient(160deg, var(--navy-900), var(--navy-700)); color: #fff; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.contact-copy h2 { color: #fff; margin: 6px 0 14px; }
.contact-copy > p { color: var(--blue-200); margin-bottom: 26px; max-width: 440px; }
.contact-points { list-style: none; display: flex; flex-direction: column; gap: 14px; }
.contact-points li { display: flex; align-items: center; gap: 12px; font-weight: 500; color: #e8f1fb; }
.contact-points svg { color: var(--accent); flex-shrink: 0; }
.contact-points a { border-bottom: 1px solid rgba(232,163,61,.5); transition: color .2s ease; }
.contact-points a:hover { color: var(--accent); }

.contact-form {
  background: var(--white); color: var(--ink); border-radius: var(--radius);
  padding: 32px; box-shadow: var(--shadow-lg);
}
.field { margin-bottom: 16px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--navy-800); margin-bottom: 6px; }
.field input, .field select, .field textarea {
  width: 100%; font-family: var(--sans); font-size: 0.95rem; color: var(--ink);
  padding: 12px 14px; border: 1.5px solid var(--line); border-radius: var(--radius-sm);
  background: var(--bg-soft); transition: border-color .2s ease, background .2s ease, box-shadow .2s ease;
}
.field textarea { resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--blue-400); background: #fff; box-shadow: 0 0 0 3px rgba(91,143,199,.15);
}
.form-note { margin-top: 14px; font-size: 0.92rem; font-weight: 600; text-align: center; }
.form-note.ok { color: #157a4a; }
.form-note.err { color: #c0392b; }

/* ---------- Footer ---------- */
.site-footer { background: var(--navy-900); color: #aebfd4; padding: 64px 0 28px; }
.footer-inner { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 36px; }
.footer-brand p { font-size: 0.92rem; margin-top: 14px; max-width: 300px; color: #8ea4c0; }
.footer-social {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 18px;
  padding: 9px 16px; border-radius: 999px; font-size: 0.88rem; font-weight: 600;
  color: #e8f1fb; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12);
  transition: background .2s ease, color .2s ease, transform .2s ease;
}
.footer-social:hover { background: var(--accent); color: #fff; transform: translateY(-2px); }
.footer-col h4 { color: #fff; font-family: var(--sans); font-size: 0.95rem; font-weight: 700; margin-bottom: 14px; }
.footer-col a { display: block; font-size: 0.9rem; color: #9fb3cd; margin-bottom: 9px; transition: color .2s ease; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  margin-top: 44px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.10);
  font-size: 0.85rem; color: #7f93af;
}

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; gap: 44px; }
  .hero-card { justify-content: flex-start; }
  .why-grid { grid-template-columns: 1fr; gap: 32px; }
  .why-copy { position: static; }
  .cards-4 { grid-template-columns: repeat(2, 1fr); }
  .offer-grid, .cards-6 { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 28px; }
}
@media (max-width: 720px) {
  .nav {
    position: fixed; inset: 72px 0 auto 0; flex-direction: column; align-items: stretch;
    gap: 0; background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
    padding: 8px 0; transform: translateY(-130%); transition: transform .35s ease; visibility: hidden;
  }
  .nav.open { transform: translateY(0); visibility: visible; }
  .nav a { padding: 14px 24px; border-bottom: 1px solid var(--bg-alt); }
  .nav .nav-cta { margin: 12px 24px; text-align: center; }
  .nav-toggle { display: flex; }
  .section { padding: 70px 0; }
  .hero { padding: 130px 0 70px; }
  .cards-4, .cards-6, .offer-grid, .team-grid { grid-template-columns: 1fr; }
  .field-row { grid-template-columns: 1fr; }
  .member { flex-direction: column; }
  .hero-stats { gap: 26px; }
  .trust-inner { justify-content: flex-start; }
}
@media (max-width: 420px) {
  .footer-inner { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}