/* =========
   Base styles
   ========= */
:root{
  --bg: #0b0c10;
  --panel: #12141a;
  --text: #e8eaed;
  --muted: #9aa0a6;
  --brand: #7ab3ff;
  --brand-ink: #0a244d;
  --accent: #8be9a1;
  --ring: #2b66ff33;
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
  --radius: 18px;
}

@media (prefers-color-scheme: light){
  :root{
    --bg: #f7f7fb;
    --panel: #ffffff;
    --text: #1f2328;
    --muted: #5b646e;
    --brand: #2054ff;
    --brand-ink: #0d2aa8;
    --accent: #22c55e;
    --ring: #2054ff22;
    --shadow: 0 6px 22px rgba(0,0,0,0.08);
  }
}

* { box-sizing: border-box; }

html, body{
  margin: 0;
  padding: 0;
  background: linear-gradient(180deg, var(--bg), color-mix(in srgb, var(--bg), #000 6%));
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Inter, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
}

.container{
  width: min(1100px, 92vw);
  margin-inline: auto;
}

.skip-link{
  position:absolute; left:-9999px; top:auto; width:1px; height:1px; overflow:hidden;
}
.skip-link:focus{ left: 12px; top:12px; width:auto; height:auto; background:var(--brand); color:#fff; padding:.5rem .75rem; border-radius:8px; }

/* Header & Nav */
.site-header{
  position: sticky;
  top: 0;
  backdrop-filter: blur(8px);
  background: color-mix(in srgb, var(--bg), #000 30%);
  border-bottom: 1px solid color-mix(in srgb, var(--panel), #fff 6%);
  z-index: 10;
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding: .8rem 0;
}
.logo{
  display:inline-flex; align-items:center; gap:.25rem;
  font-weight: 800; letter-spacing:.5px; text-decoration:none; color: var(--text);
}
.logo .logo-mark{ color: var(--brand); }
.logo .logo-text{ background: linear-gradient(45deg, var(--brand), var(--accent)); -webkit-background-clip:text; background-clip:text; color:transparent; }

.nav-menu{ list-style:none; display:flex; gap:1rem; padding:0; margin:0; align-items:center; }
.nav-menu a{ color: var(--text); text-decoration:none; padding:.4rem .6rem; border-radius:10px; }
.nav-menu a:hover{ background: color-mix(in srgb, var(--panel), #fff 4%); }
.nav-toggle{ display:none; background:none; border:none; color:var(--text); font-size:1.35rem; }

@media (max-width: 760px){
  .nav-toggle{ display:block; }
  .nav-menu{ position:absolute; right:0; top:56px; background: var(--panel); padding:.5rem; border-radius: 12px; box-shadow: var(--shadow); display:none; margin-right:4vw; }
  .nav-menu.open{ display:block; }
}

/* Buttons */
.btn{
  display:inline-block; border:none; background: linear-gradient(135deg, var(--brand), var(--accent));
  color:#0b1020; padding:.75rem 1.1rem; border-radius:12px; font-weight:700; text-decoration:none;
  box-shadow: var(--shadow);
}
.btn:hover{ transform: translateY(-1px); }
.btn:focus{ outline: 3px solid var(--ring); outline-offset: 2px; }
.btn-ghost{ background: none; border: 1px solid color-mix(in srgb, var(--panel), #fff 8%); color: var(--text); box-shadow:none; }
.btn-ghost:hover{ background: color-mix(in srgb, var(--panel), #fff 8%); }

/* Hero */
.hero{
  padding: clamp(3rem, 8vw, 6rem) 0 2rem;
  text-align: center;
}
.hero h1{
  font-size: clamp(1.9rem, 3.6vw, 3rem);
  line-height: 1.2;
  letter-spacing: -0.3px;
}
.hero h1 em{ font-style: normal; color: var(--brand); }
.lead{ font-size: 1.1rem; color: var(--muted); }
.cta{ display:flex; gap:.75rem; justify-content:center; margin-top:1rem; flex-wrap:wrap; }

/* Sections */
.section{ padding: 2.2rem 0; }
.section h2{ font-size: 1.6rem; margin: 0 0 .25rem; }
.muted{ color: var(--muted); }

/* Cards/Grid */
.grid{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 1rem; }
@media (max-width: 980px){ .grid{ grid-template-columns: repeat(2, 1fr);} }
@media (max-width: 640px){ .grid{ grid-template-columns: 1fr; } }
.card{
  background: var(--panel);
  border: 1px solid color-mix(in srgb, var(--panel), #fff 8%);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow);
  transition: transform .15s ease, box-shadow .2s ease;
}
.card:hover{ transform: translateY(-2px); box-shadow: 0 16px 38px rgba(0,0,0,.28); }
.card h3{ margin: .2rem 0 .4rem; }
.tags{ list-style:none; display:flex; gap:.4rem; padding:0; margin:.6rem 0 0; flex-wrap:wrap; }
.tags li{ font-size:.85rem; color: var(--brand-ink); background: color-mix(in srgb, var(--brand), #fff 70%); padding:.2rem .5rem; border-radius:999px; }

/* Steps */
.steps{ display:grid; grid-template-columns: repeat(3, 1fr); gap:1rem; margin-top:.5rem; }
@media (max-width: 760px){ .steps{ grid-template-columns: 1fr; } }
.step{ background: var(--panel); border: 1px solid color-mix(in srgb, var(--panel), #fff 8%); border-radius: var(--radius); padding:1rem; }
.step-num{
  display:inline-grid; place-items:center; width:32px; height:32px;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  color:#0b1020; border-radius:999px; font-weight:800; margin-bottom:.4rem;
}

/* Contact */
.contact{ display:grid; gap:.8rem; max-width: 720px; }
.field{ display:grid; gap:.25rem; }
input, textarea{
  background: var(--panel);
  border: 1px solid color-mix(in srgb, var(--panel), #fff 8%);
  border-radius: 10px;
  padding: .65rem .75rem;
  color: var(--text);
}
input:focus, textarea:focus{ outline: 3px solid var(--ring); outline-offset: 2px; }

/* Footer */
.site-footer{
  border-top: 1px solid color-mix(in srgb, var(--panel), #fff 6%);
  margin-top: 2rem;
}
.footer-inner{ display:flex; align-items:center; justify-content:space-between; gap:.5rem; padding: 1.2rem 0; }
.back-to-top{ color: var(--muted); text-decoration:none; }
.back-to-top:hover{ text-decoration: underline; }

/* Utilities */
.sr-only{ position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); border:0; }

.card-body {
  display: none;
  margin-top: .5rem;
}

.card.expanded .card-body {
  display: block;
}

.card-toggle {
  background: none;
  border: none;
  font: inherit;
  color: inherit;
  display: flex;
  align-items: center;
  gap: .4rem;
  cursor: pointer;
}

.card > h2 { cursor: pointer; }