/* ==========================================================================
   Banton Group — Design System
   Neat, fast, accessible. Mobile-first. No external dependencies.
   ========================================================================== */

/* ---- Design tokens ---------------------------------------------------- */
:root {
  /* Brand palette */
  --navy-900: #0b2138;
  --navy-800: #0f2a43;
  --navy-700: #16395a;
  --navy-600: #1f4d77;
  --ink:      #0c1722;
  --slate:    #51637a;
  --slate-300:#8597ad;
  --line:     #e4eaf1;
  --mist:     #f5f8fb;
  --white:    #ffffff;

  /* Action / accent */
  --amber:    #f5a623;
  --amber-600:#e0930f;

  /* Sub-brand accents */
  --energy:      #1aa260;   /* Banton Energy  */
  --energy-700:  #14834d;
  --maintenance: #0ea5a4;   /* Banton Maintenance */
  --maintenance-700:#0a807f;
  --electrical:  #2563eb;   /* iElectrical (external) */

  /* Typography */
  --font: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;

  /* Rhythm */
  --container: 1180px;
  --gap: 24px;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px rgba(12,23,34,.06), 0 1px 3px rgba(12,23,34,.08);
  --shadow-md: 0 8px 24px rgba(12,23,34,.10);
  --shadow-lg: 0 18px 50px rgba(12,23,34,.16);
  --header-h: 74px;
}

/* ---- Reset / base ----------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--navy-600); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { color: var(--navy-800); line-height: 1.15; margin: 0 0 .5em; font-weight: 800; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 4.6vw, 3.25rem); }
h2 { font-size: clamp(1.55rem, 3vw, 2.25rem); }
h3 { font-size: 1.2rem; }
p  { margin: 0 0 1rem; }
ul { margin: 0 0 1rem; padding-left: 1.2rem; }
:focus-visible { outline: 3px solid var(--amber); outline-offset: 2px; border-radius: 4px; }

/* ---- Layout helpers --------------------------------------------------- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 22px; }
.section { padding: clamp(48px, 7vw, 88px) 0; }
.section--mist { background: var(--mist); }
.section--navy { background: var(--navy-800); color: #d7e3f0; }
.section--navy h2, .section--navy h3 { color: #fff; }
.eyebrow { display: inline-block; font-size: .8rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--amber-600); margin-bottom: .6rem; }
.section--navy .eyebrow { color: var(--amber); }
.lead { font-size: 1.12rem; color: var(--slate); max-width: 60ch; }
.section--navy .lead { color: #b9cbdd; }
.center { text-align: center; }
.center .lead { margin-inline: auto; }
.stack > * + * { margin-top: 1rem; }
.grid { display: grid; gap: var(--gap); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.muted { color: var(--slate); }

/* ---- Buttons ---------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  font: inherit; font-weight: 700; font-size: 1rem;
  padding: .8rem 1.4rem; border-radius: 999px; border: 2px solid transparent;
  cursor: pointer; text-decoration: none; transition: transform .12s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--amber); color: #2a1c00; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--amber-600); }
.btn-dark { background: var(--navy-800); color: #fff; }
.btn-dark:hover { background: var(--navy-700); }
.btn-ghost { background: transparent; color: var(--navy-800); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--navy-600); background: var(--mist); }
.btn-outline-light { background: transparent; color: #fff; border-color: rgba(255,255,255,.4); }
.btn-outline-light:hover { background: rgba(255,255,255,.1); border-color:#fff; }
.btn--energy { background: var(--energy); color:#fff; }
.btn--energy:hover { background: var(--energy-700); }
.btn--maintenance { background: var(--maintenance); color:#fff; }
.btn--maintenance:hover { background: var(--maintenance-700); }
.btn-group { display: flex; flex-wrap: wrap; gap: .75rem; }

/* ---- Header ----------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92); backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 1.2rem; min-height: var(--header-h); }
.brand { display: inline-flex; align-items: center; gap: .6rem; font-weight: 800; color: var(--navy-800); font-size: 1.16rem; letter-spacing: -.02em; }
.brand:hover { text-decoration: none; }
.brand .mark { width: 34px; height: 34px; flex: none; }
.brand small { display:block; font-size:.62rem; font-weight:600; letter-spacing:.14em; text-transform:uppercase; color:var(--slate-300); margin-top:-2px;}

.nav { margin-left: auto; }
.nav > ul { display: flex; align-items: center; gap: .35rem; list-style: none; margin: 0; padding: 0; }
.nav a { color: var(--navy-800); font-weight: 600; padding: .55rem .7rem; border-radius: 8px; display:inline-block; }
.nav a:hover { background: var(--mist); text-decoration: none; }
.has-dropdown { position: relative; }
.dd-toggle::after { content:""; display:inline-block; width:.5em; height:.5em; margin-left:.4em; border-right:2px solid currentColor; border-bottom:2px solid currentColor; transform: rotate(45deg) translateY(-2px); opacity:.6; }
.dropdown {
  position: absolute; top: calc(100% + 8px); left: 0; min-width: 260px;
  background:#fff; border:1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-md);
  padding: .5rem; opacity:0; visibility:hidden; transform: translateY(6px); transition: .16s ease;
}
.mega { left: auto; right: 0; width: min(620px, 92vw); }
.has-dropdown:hover .dropdown,
.has-dropdown:focus-within .dropdown { opacity:1; visibility:visible; transform: translateY(0); }
.dropdown a { display:block; padding:.6rem .8rem; border-radius:8px; font-weight:600; }
.dropdown a span { display:block; font-weight:500; font-size:.82rem; color:var(--slate); }
.mega-grid { display:grid; grid-template-columns:1fr 1fr; gap:.2rem; }
.mega h4 { grid-column:1 / -1; font-size:.72rem; letter-spacing:.1em; text-transform:uppercase; color:var(--slate-300); margin:.4rem .8rem .2rem; }
.tag-energy { color: var(--energy-700); }
.tag-maint  { color: var(--maintenance-700); }
.tag-elec   { color: var(--electrical); }

.header-cta { margin-left: .4rem; }
.nav-toggle { display:none; }

/* ---- Hero ------------------------------------------------------------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1100px 520px at 85% -10%, rgba(245,166,35,.16), transparent 60%),
    radial-gradient(900px 600px at -5% 110%, rgba(31,77,119,.18), transparent 55%),
    linear-gradient(180deg, var(--navy-900), var(--navy-800));
  color: #eaf1f8;
}
.hero .container { position: relative; z-index: 1; padding-block: clamp(56px, 9vw, 104px); }
.hero h1 { color:#fff; max-width: 16ch; }
.hero p { color:#c4d4e4; font-size: 1.18rem; max-width: 56ch; }
.hero .btn-group { margin-top: 1.6rem; }
.hero--energy { background:
    radial-gradient(1000px 500px at 85% -10%, rgba(26,162,96,.28), transparent 60%),
    linear-gradient(180deg, #07241a, #0c3a2a); }
.hero--maintenance { background:
    radial-gradient(1000px 500px at 85% -10%, rgba(14,165,164,.26), transparent 60%),
    linear-gradient(180deg, #06262b, #0b3b40); }
.hero-grid { display:grid; grid-template-columns: 1.2fr .8fr; gap: 2.5rem; align-items:center; }
.hero-card {
  background: rgba(255,255,255,.07); border:1px solid rgba(255,255,255,.16);
  border-radius: var(--radius); padding: 1.4rem; backdrop-filter: blur(4px);
}
.hero-card .stat { display:flex; align-items:baseline; gap:.5rem; padding:.55rem 0; border-bottom:1px solid rgba(255,255,255,.12); }
.hero-card .stat:last-child { border-bottom:0; }
.hero-card .stat b { font-size:1.5rem; color:#fff; }
.hero-card .stat span { color:#bcd0e3; font-size:.95rem; }

/* ---- Trust strip ------------------------------------------------------ */
.trust { background: var(--navy-900); color:#cdddec; border-top:1px solid rgba(255,255,255,.06); }
.trust ul { display:flex; flex-wrap:wrap; justify-content:center; gap:.6rem 2rem; list-style:none; margin:0; padding:18px 0; font-weight:600; font-size:.95rem; }
.trust li { display:flex; align-items:center; gap:.5rem; }
.trust svg { width:18px; height:18px; color:var(--amber); flex:none; }

/* ---- Cards ------------------------------------------------------------ */
.card {
  background:#fff; border:1px solid var(--line); border-radius: var(--radius);
  padding: 1.5rem; box-shadow: var(--shadow-sm); transition: transform .15s ease, box-shadow .2s ease, border-color .2s;
  display:flex; flex-direction:column;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color:#d4deea; }
.card h3 { margin-bottom:.4rem; }
.card p { color:var(--slate); margin-bottom:1rem; }
.card .card-cta { margin-top:auto; font-weight:700; color:var(--navy-600); display:inline-flex; align-items:center; gap:.35rem; }
.card .card-cta::after { content:"→"; transition: transform .15s; }
.card:hover .card-cta::after { transform: translateX(3px); }
.card .pill { align-self:flex-start; font-size:.7rem; font-weight:700; letter-spacing:.06em; text-transform:uppercase; padding:.25rem .6rem; border-radius:999px; margin-bottom:.8rem; }
.pill-energy { background: #e6f6ee; color: var(--energy-700); }
.pill-maint  { background: #e2f5f5; color: var(--maintenance-700); }
.pill-elec   { background: #e6edfd; color: var(--electrical); }
.pill-core   { background: #eef2f7; color: var(--navy-700); }
.card-icon { width:46px; height:46px; border-radius:12px; display:grid; place-items:center; background:var(--mist); color:var(--navy-700); margin-bottom:1rem; }
.card-icon svg { width:24px; height:24px; }

/* ---- Brand gateway cards --------------------------------------------- */
.brand-card { position:relative; overflow:hidden; color:#fff; border:0; padding:1.8rem; min-height:210px; justify-content:flex-end; }
.brand-card h3 { color:#fff; font-size:1.45rem; }
.brand-card p { color: rgba(255,255,255,.85); }
.brand-card .card-cta { color:#fff; }
.brand-card.energy { background: linear-gradient(150deg, var(--energy-700), #0b6b3f); }
.brand-card.maintenance { background: linear-gradient(150deg, var(--maintenance-700), #086d6c); }
.brand-card.electrical { background: linear-gradient(150deg, #1e40af, var(--electrical)); }

/* ---- Steps / process -------------------------------------------------- */
.steps { counter-reset: step; display:grid; gap:1.2rem; }
.steps li { list-style:none; position:relative; padding-left:3.4rem; }
.steps li::before {
  counter-increment: step; content: counter(step);
  position:absolute; left:0; top:-2px; width:2.4rem; height:2.4rem; border-radius:50%;
  background:var(--navy-800); color:#fff; font-weight:800; display:grid; place-items:center;
}
.steps h3 { margin-bottom:.15rem; }
.steps p { color:var(--slate); margin:0; }

/* ---- FAQ (native, accessible) ---------------------------------------- */
.faq { max-width: 820px; margin-inline:auto; }
.faq details { border:1px solid var(--line); border-radius: var(--radius-sm); background:#fff; margin-bottom:.7rem; box-shadow: var(--shadow-sm); }
.faq summary { cursor:pointer; list-style:none; padding:1.05rem 1.2rem; font-weight:700; color:var(--navy-800); display:flex; justify-content:space-between; align-items:center; gap:1rem; }
.faq summary::-webkit-details-marker { display:none; }
.faq summary::after { content:"+"; font-size:1.4rem; font-weight:600; color:var(--amber-600); transition: transform .2s; line-height:1; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq .faq-body { padding: 0 1.2rem 1.15rem; color:var(--slate); }

/* ---- CTA band --------------------------------------------------------- */
.cta-band { background: linear-gradient(120deg, var(--navy-800), var(--navy-600)); color:#fff; border-radius: var(--radius); padding: clamp(2rem,5vw,3.2rem); text-align:center; box-shadow: var(--shadow-md); }
.cta-band h2 { color:#fff; }
.cta-band p { color:#cad9e8; max-width:54ch; margin-inline:auto; }
.cta-band .btn-group { justify-content:center; margin-top:1.4rem; }

/* ---- Forms ------------------------------------------------------------ */
.form-card { background:#fff; border:1px solid var(--line); border-radius:var(--radius); box-shadow:var(--shadow-md); padding: clamp(1.4rem, 3vw, 2.2rem); }
.field { margin-bottom: 1rem; }
.field label { display:block; font-weight:700; font-size:.9rem; margin-bottom:.35rem; color:var(--navy-800); }
.field .req { color:#c0392b; }
.field input, .field select, .field textarea {
  width:100%; font:inherit; padding:.7rem .85rem; border:1.5px solid var(--line); border-radius:10px; background:#fff; color:var(--ink); transition:border-color .15s, box-shadow .15s;
}
.field input:focus, .field select:focus, .field textarea:focus { outline:none; border-color:var(--navy-600); box-shadow:0 0 0 3px rgba(31,77,119,.12); }
.field textarea { min-height:120px; resize:vertical; }
.field-row { display:grid; grid-template-columns:1fr 1fr; gap:1rem; }
.form-note { font-size:.85rem; color:var(--slate); }
.form-success { display:none; background:#e6f6ee; border:1px solid #b7e3c9; color:#14834d; padding:1rem 1.2rem; border-radius:10px; font-weight:600; }

/* ---- Contact info list ------------------------------------------------ */
.info-list { list-style:none; padding:0; margin:0; display:grid; gap:1.1rem; }
.info-list li { display:flex; gap:.9rem; align-items:flex-start; }
.info-list .ic { width:42px; height:42px; border-radius:10px; background:var(--mist); color:var(--navy-700); display:grid; place-items:center; flex:none; }
.info-list .ic svg { width:20px; height:20px; }
.info-list b { display:block; color:var(--navy-800); }
.info-list a, .info-list span { color:var(--slate); }

/* ---- Footer ----------------------------------------------------------- */
.site-footer { background: var(--navy-900); color:#a9bdd2; padding: 64px 0 28px; }
.site-footer a { color:#c6d6e6; }
.site-footer a:hover { color:#fff; }
.footer-grid { display:grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap:2rem; }
.footer-grid h4 { color:#fff; font-size:.82rem; letter-spacing:.1em; text-transform:uppercase; margin-bottom:1rem; }
.footer-grid ul { list-style:none; padding:0; margin:0; display:grid; gap:.55rem; }
.footer-brand .mark { width:36px; height:36px; }
.footer-brand p { color:#8ea6bf; max-width:34ch; margin-top:.8rem; font-size:.95rem; }
.ext::after { content:"↗"; font-size:.7em; margin-left:.25em; opacity:.7; vertical-align:super; }
.footer-bottom { border-top:1px solid rgba(255,255,255,.1); margin-top:48px; padding-top:24px; display:flex; flex-wrap:wrap; gap:1rem; justify-content:space-between; font-size:.86rem; color:#7f97b0; }
.footer-bottom a { color:#7f97b0; }

/* ---- Mobile sticky action bar ---------------------------------------- */
.mobile-bar { display:none; }

/* ---- Misc ------------------------------------------------------------- */
.skip-link { position:absolute; left:-999px; top:0; background:var(--amber); color:#000; padding:.6rem 1rem; z-index:200; border-radius:0 0 8px 0; }
.skip-link:focus { left:0; }
.badge-row { display:flex; flex-wrap:wrap; gap:.6rem; margin-top:1.2rem; }
.badge { display:inline-flex; align-items:center; gap:.45rem; background:#fff; border:1px solid var(--line); border-radius:999px; padding:.4rem .9rem; font-weight:600; font-size:.85rem; color:var(--navy-700); box-shadow:var(--shadow-sm); }
.badge svg { width:16px; height:16px; color:var(--energy); }
.divider { height:1px; background:var(--line); border:0; margin: 0; }
.list-check { list-style:none; padding:0; display:grid; gap:.6rem; }
.list-check li { position:relative; padding-left:1.9rem; }
.list-check li::before { content:""; position:absolute; left:0; top:.45em; width:14px; height:9px; border-left:2.5px solid var(--energy); border-bottom:2.5px solid var(--energy); transform:rotate(-45deg); }
.breadcrumb { padding:14px 0; font-size:.85rem; color:var(--slate); }
.breadcrumb a { color:var(--slate); }
.breadcrumb span { margin:0 .4rem; opacity:.5; }

/* ---- Responsive ------------------------------------------------------- */
@media (max-width: 960px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-card { display:none; }
}
@media (max-width: 820px) {
  body { font-size: 16px; }
  /* Mobile nav */
  .nav-toggle {
    display:inline-flex; margin-left:auto; flex-direction:column; gap:5px;
    background:none; border:0; padding:10px; cursor:pointer;
  }
  .nav-toggle span { width:24px; height:2.5px; background:var(--navy-800); border-radius:2px; transition:.2s; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1){ transform:translateY(7.5px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity:0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3){ transform:translateY(-7.5px) rotate(-45deg); }
  .header-cta { display:none; }
  .nav {
    position: fixed; inset: var(--header-h) 0 0 auto; width:min(340px,86vw);
    background:#fff; border-left:1px solid var(--line); box-shadow:var(--shadow-lg);
    transform: translateX(100%); transition: transform .22s ease; overflow-y:auto; padding:1rem; margin:0;
  }
  .nav.open { transform: translateX(0); }
  .nav > ul { flex-direction:column; align-items:stretch; gap:.15rem; }
  .nav a { padding:.8rem .6rem; border-radius:8px; }
  .dropdown, .mega { position:static; opacity:1; visibility:visible; transform:none; box-shadow:none; border:0; border-left:2px solid var(--line); border-radius:0; margin:.2rem 0 .4rem .6rem; padding-left:.4rem; min-width:0; width:auto; }
  .mega-grid { grid-template-columns:1fr; }
  .dd-toggle::after { float:right; margin-top:.4em; }
  .nav-backdrop { position:fixed; inset:var(--header-h) 0 0 0; background:rgba(11,33,56,.4); z-index:99; opacity:0; visibility:hidden; transition:.2s; }
  .nav-backdrop.open { opacity:1; visibility:visible; }

  .grid--2, .grid--3, .field-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap:1.6rem; }

  /* Sticky bottom action bar */
  .mobile-bar {
    display:grid; grid-template-columns: repeat(3,1fr);
    position:fixed; bottom:0; left:0; right:0; z-index:90;
    background:#fff; border-top:1px solid var(--line); box-shadow:0 -4px 16px rgba(12,23,34,.1);
  }
  .mobile-bar a { display:flex; flex-direction:column; align-items:center; gap:2px; padding:.55rem; font-size:.72rem; font-weight:700; color:var(--navy-800); }
  .mobile-bar a:hover { text-decoration:none; background:var(--mist); }
  .mobile-bar a svg { width:20px; height:20px; color:var(--navy-700); }
  .mobile-bar a.call svg { color:var(--energy); }
  .mobile-bar a + a { border-left:1px solid var(--line); }
  body { padding-bottom: 62px; }
}
@media (max-width: 480px) {
  .grid--4 { grid-template-columns: 1fr; }
  .btn { width:100%; justify-content:center; }
  .hero .btn-group .btn, .cta-band .btn { width:auto; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior:auto !important; transition:none !important; animation:none !important; }
}