:root{
  /* Brand / theme colors */
  --brand-yellow:#ffd400;
  --brand-yellow-dark:#f2c200;

  /* Neutrals */
  --ink-900:#0f172a;        /* main text */
  --ink-800:#111827;        /* dark surfaces / headings */
  --ink-600:#475569;        /* muted text */
  --white:#ffffff;
  --black:#000000;

  /* UI surfaces */
  --bg:var(--white);
  --surface:var(--white);
  --soft:#f8fafc;
  --border:#e2e8f0;
  --hover-surface:#f1f5f9;

  /* Feedback */
  --focus:#0ea5e9;
  --warning:#f59e0b;
  --warning-bg:#fffbeb;
  --warning-text:#92400e;

  /* Overlays */
  --topbar-border: rgba(0,0,0,.06);
  --nav-hover: rgba(17,24,39,.08);
  --banner-shadow: rgba(2, 6, 23, .12);
  --banner-overlay-1: rgba(0,0,0,.65);
  --banner-overlay-2: rgba(0,0,0,.35);
  --banner-overlay-3: rgba(0,0,0,.15);
  --banner-text: rgba(255,255,255,.92);
  --chip-border: rgba(255,255,255,.25);
  --btn-light-bg: rgba(255,255,255,.10);
  --btn-light-bg-hover: rgba(255,255,255,.18);

  /* Hint box */
  --hint-border: rgba(255,212,0,.55);
  --hint-bg: rgba(255,212,0,.18);

  /* Typography / layout */
  --radius:16px;
  --max:1120px;
  --font:"Poppins", sans-serif;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family:var(--font);
  background:var(--bg);
  color:var(--ink-900);
  line-height:1.6;
}

.container{
  width: min(100%, var(--max));
  margin:0 auto;
  padding-inline:16px;
}

a{ color:inherit; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline:3px solid var(--focus);
  outline-offset:2px;
  border-radius:10px;
}

.skip-link{
  position:absolute;
  left:-999px;
  top:12px;
  background:var(--black);
  color:var(--white);
  padding:10px 12px;
  border-radius:10px;
}
.skip-link:focus{ left:12px; z-index:9999; }

/* Topbar */
.topbar{
  background:var(--brand-yellow);
  border-bottom:1px solid var(--topbar-border);
}
.topbar__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:14px 0;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
}
.brand__mark{
  width:38px;
  height:38px;
  border-radius:12px;
  background:var(--ink-800);
}
.brand__text{ display:flex; flex-direction:column; gap:2px; }
.brand__sub{ font-size:12.5px; color:rgba(15,23,42,.80); }

.nav{
  display:flex;
  gap:10px;
  align-items:center;
}
.nav a{
  text-decoration:none;
  padding:8px 10px;
  border-radius:10px;
  color:var(--ink-800);
  font-weight:700;
}
.nav a:hover{ background:var(--nav-hover); }
.nav__cta{
  background:var(--ink-800);
  color:var(--white) !important;
}
.nav__cta:hover{ background:var(--black) !important; }

/* Mobile nav toggle button */
.nav__toggle{
  display:none;
  border:1px solid rgba(0,0,0,.15);
  background:rgba(255,255,255,.35);
  color:var(--ink-800);
  border-radius:12px;
  padding:8px 12px;
  font-weight:900;
  cursor:pointer;
}
.nav__toggle:hover{ background:rgba(255,255,255,.55); }

/* Banner (ONE big banner) */
.banner{
  padding:18px 0 8px;
}
.banner__wrap{
  position:relative;
  border-radius:22px;
  overflow:hidden;
  border:1px solid var(--border);
  background:var(--ink-800);
  height:340px; /* PC banner height */
  box-shadow: 0 16px 40px var(--banner-shadow);
}
.banner__img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.banner__overlay{
  position:absolute;
  inset:0;
  background: linear-gradient(
    90deg,
    var(--banner-overlay-1) 0%,
    var(--banner-overlay-2) 45%,
    var(--banner-overlay-3) 100%
  );
}
.banner__content{
  position:absolute;
  left:28px;
  bottom:26px;
  max-width: 760px;
  color:var(--white);
}
.banner__tag{
  display:inline-block;
  background:rgba(255,212,0,.95);
  color:var(--ink-800);
  font-weight:800;
  padding:6px 10px;
  border-radius:999px;
  margin:0 0 10px;
  font-size:13px;
}
.banner__title{
  margin:0 0 8px;
  font-size:38px;
  line-height:1.15;
  letter-spacing:-.2px;
}
.banner__text{
  margin:0 0 14px;
  color:var(--banner-text);
  font-size:15.5px;
}
.banner__actions{
  display:flex;
  gap:10px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:10px 14px;
  border-radius:12px;
  border:1px solid var(--chip-border);
  text-decoration:none;
  font-weight:800;
  cursor:pointer;
}
.btn--dark{
  background:var(--ink-800);
  border-color:var(--ink-800);
  color:var(--white);
}
.btn--dark:hover{ background:var(--black); border-color:var(--black); }
.btn--light{
  background:var(--btn-light-bg);
  color:var(--white);
}
.btn--light:hover{ background:var(--btn-light-bg-hover); }

/* Sections */
.section{ padding:26px 0; }
.section--alt{
  background:var(--soft);
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
}
.section__head h2{ margin:0 0 6px; }
.section__head p{ margin:0; }

.muted{ color:var(--ink-600); }

/* Cards */
.cards{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:12px;
  margin-top:14px;
}
.card{
  border:1px solid var(--border);
  background:var(--surface);
  border-radius:var(--radius);
  padding:14px;
}
.card h3{ margin:0 0 6px; font-size:16px; }
.card p{ margin:0; color:var(--ink-600); }

/* Chips */
.chips{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:14px;
}
.chip{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:999px;
  padding:8px 10px;
  font-size:14px;
}

/* Steps */
.steps{
  margin:14px 0 0;
  padding-left:18px;
}
.steps li{ margin:10px 0; }
.steps strong{ display:block; }

/* Contact section layout */
.contact{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:14px;
  align-items:start;
}

.info{
  margin-top:12px;
  border:1px solid var(--border);
  border-radius:var(--radius);
  background:var(--surface);
  overflow:hidden;
}
.info__row{
  display:flex;
  justify-content:space-between;
  gap:10px;
  padding:10px 12px;
  border-top:1px solid var(--border);
}
.info__row:first-child{ border-top:none; }
.info__label{ color:var(--ink-600); }

.hintbox{
  margin-top:12px;
  border:1px solid var(--hint-border);
  background:var(--hint-bg);
  border-radius: var(--radius);
  padding:12px;
}
.hintbox h3{
  margin:0 0 6px;
  font-size:15px;
}

/* Form */
.form{
  border:1px solid var(--border);
  border-radius:var(--radius);
  background:var(--surface);
  padding:14px;
  display:grid;
  gap:10px;
}
.form label{
  display:grid;
  gap:6px;
  font-weight:800;
}
input, textarea{
  width:100%;
  padding:10px 10px;
  border-radius:12px;
  border:1px solid var(--border);
  font:inherit;
}
textarea{ resize:vertical; }

.btn--yellow{
  background:var(--brand-yellow);
  border-color:var(--brand-yellow-dark);
  color:var(--ink-800);
}
.btn--yellow:hover{ background:var(--brand-yellow-dark); }

.btn--ghost{
  background:var(--surface);
  border:1px solid var(--border);
  color:var(--ink-800);
}
.btn--ghost:hover{ background:var(--hover-surface); }

.alert{
  border:1px solid var(--warning);
  background:var(--warning-bg);
  color:var(--warning-text);
  padding:10px 12px;
  border-radius:12px;
}

.output{
  display:grid;
  gap:8px;
  border-top:1px dashed var(--border);
  padding-top:10px;
}

/* Footer */
.footer{
  border-top:1px solid var(--border);
  padding:18px 0;
}
.footer__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.footer__link{
  color:var(--ink-800);
  font-weight:800;
  text-decoration:underline;
}
.footer__link:hover{ opacity:.85; }


/* -------------------------
   Responsive (Mobile)
   ------------------------- */
@media (max-width: 860px){
  .topbar{ position:sticky; top:0; z-index:1000; }
  .topbar__inner{ flex-wrap:wrap; padding:12px 0; }

  .brand__sub{ display:none; }
  .brand__text strong{ font-size:14px; }

  .nav__toggle{ display:inline-flex; align-items:center; justify-content:center; margin-left:auto; }
  .nav{
    display:none;
    width:100%;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:10px 0 4px;
  }
  .nav.is-open{ display:flex; }
  .nav a{
    padding:12px 12px;
    border-radius:12px;
    background:rgba(255,255,255,.18);
  }
  .nav a:hover{ background:rgba(255,255,255,.30); }
  .nav__cta{
    text-align:center;
    background:var(--ink-800);
    color:var(--white) !important;
  }

  .banner{ padding:14px 0 6px; }
  .banner__wrap{ height: 260px; border-radius:18px; }
  .banner__content{ left:16px; right:16px; bottom:16px; max-width:none; }
  .banner__title{ font-size:26px; }
  .banner__text{ font-size:14.5px; }
  .banner__actions{ flex-wrap:wrap; }

  .section{ padding:22px 0; }

  .cards{ grid-template-columns: 1fr; }
  .chip{ font-size:13.5px; padding:7px 10px; }

  .contact{ grid-template-columns: 1fr; }

  .info__row{ flex-direction:column; align-items:flex-start; }

  .footer__inner{ flex-direction:column; gap:10px; align-items:flex-start; }
}

@media (max-width: 420px){
  .banner__wrap{ height: 230px; }
  .banner__title{ font-size:22px; }
}