:root{
  --ink:#07101f;
  --muted:#44556f;

  --brand:#1E3557;
  --accent:#E6A23C;

  --bg:#f7fbff;
  --surface:#ffffff;

  --line:rgba(15,23,42,.12);
  --line2:rgba(15,23,42,.18);
  --line3:rgba(15,23,42,.26);

  --radius:14px;
  --radius2:12px;

  --shadow: 0 18px 55px rgba(10,18,32,.10);
  --shadow2: 0 26px 70px rgba(6,10,18,.18);
  --shadow3: 0 10px 26px rgba(6,10,18,.12);

  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

*{ box-sizing:border-box; }

html{ scroll-behavior:smooth; }

body{
  margin:0;
  font-family: system-ui,-apple-system,Segoe UI,Arial;
  color:var(--ink);

  /* instrument background */
  background:
    radial-gradient(1000px 520px at 10% -14%, rgba(30,53,87,.28), transparent 62%),
    radial-gradient(1000px 520px at 90% -14%, rgba(230,162,60,.18), transparent 62%),
    radial-gradient(900px 520px at 50% 0%, rgba(7,16,31,.10), transparent 68%),
    linear-gradient(180deg, #f6fbff 0%, #ffffff 60%);
}

.container{ max-width:1120px; margin:0 auto; padding:0 20px; }

/* ===== instrument overlay: crosshair + grid + subtle ticks ===== */
.page{ position:relative; padding:34px 0 44px; }
.page::before{
  content:"";
  position:fixed; inset:0;
  pointer-events:none;
  background:
    /* crosshair */
    linear-gradient(90deg, transparent 49.8%, rgba(30,53,87,.09) 50%, transparent 50.2%),
    linear-gradient(0deg, transparent 49.8%, rgba(30,53,87,.09) 50%, transparent 50.2%),

    /* major grid */
    linear-gradient(90deg, rgba(30,53,87,.055) 1px, transparent 1px),
    linear-gradient(0deg, rgba(30,53,87,.055) 1px, transparent 1px),

    /* minor grid (fainter) */
    linear-gradient(90deg, rgba(30,53,87,.025) 1px, transparent 1px),
    linear-gradient(0deg, rgba(30,53,87,.025) 1px, transparent 1px);

  background-size:
    100% 100%,
    100% 100%,
    96px 96px,
    96px 96px,
    24px 24px,
    24px 24px;

  opacity:.60;
  z-index:0;
}
.page > .container{ position:relative; z-index:1; }

/* ===== typography ===== */
.page-title{
  margin:0 0 10px;
  color:var(--brand);
  font-weight:1000;
  letter-spacing:-.7px;
  font-size:34px;
  line-height:1.08;
}
.lead{
  margin:0 0 18px;
  color:var(--muted);
  line-height:1.65;
  font-weight:650;
  max-width: 72ch;
}

/* ===== header ===== */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding:10px 0; gap:14px;
}
.logo-wrap{ display:flex; align-items:center; text-decoration:none; }
.logo-img{
  height:78px; width:auto; display:block;
  filter: drop-shadow(0 12px 26px rgba(30,53,87,.14));
}

.nav{ display:flex; align-items:center; gap:8px; }
.nav a{
  text-decoration:none;
  color:var(--muted);
  font-weight:900;
  font-size:14px;
  padding:10px 12px;
  border-radius:12px;
  transition:.15s ease;
}
.nav a:hover{
  background: rgba(30,53,87,.08);
  color:var(--brand);
  transform: translateY(-1px);
}
.nav a[aria-current="page"]{
  background: rgba(30,53,87,.10);
  color: var(--brand);
  box-shadow:
    inset 0 0 0 1px rgba(30,53,87,.18),
    0 10px 24px rgba(6,10,18,.06);
}

/* burger */
.burger{
  display:none;
  border:1px solid var(--line);
  background:rgba(255,255,255,.92);
  border-radius:14px;
  padding:10px 12px;
  cursor:pointer;
  box-shadow: var(--shadow3);
}
.burger-lines{ display:flex; flex-direction:column; gap:5px; }
.burger-lines span{ width:22px; height:2px; background:var(--brand); border-radius:2px; display:block; }

.mobile-nav{
  display:none;
  border-top:1px solid var(--line);
  background: rgba(255,255,255,.94);
}
.mobile-nav.open{ display:block; }
.mobile-nav-inner{ padding:12px 0; display:flex; flex-direction:column; gap:6px; }
.mobile-nav a{
  text-decoration:none; color:var(--muted); font-weight:950;
  padding:12px 12px; border-radius:14px;
}
.mobile-nav a:hover{ background:rgba(30,53,87,.08); color:var(--brand); }
.mobile-nav a[aria-current="page"]{
  background: rgba(30,53,87,.10);
  color: var(--brand);
  box-shadow: inset 0 0 0 1px rgba(30,53,87,.18);
}

/* ===== layout grids ===== */
.grid-2{ display:grid; grid-template-columns: 1.12fr .88fr; gap:16px; align-items:start; }
.grid-3{ display:grid; grid-template-columns: repeat(3, 1fr); gap:16px; }

/* ===== instrument cards (bezel + depth) ===== */
.card{
  position:relative;
  background: rgba(255,255,255,.94);
  border: 1px solid var(--line2);
  border-radius: var(--radius2);
  padding:18px;
  box-shadow: var(--shadow2);
  overflow:hidden;
}

/* bezel inner line */
.card::before{
  content:"";
  position:absolute;
  inset:10px;
  border-radius: calc(var(--radius2) - 6px);
  border:1px solid rgba(30,53,87,.08);
  pointer-events:none;
}

/* top “instrument edge” */
.card::after{
  content:"";
  position:absolute;
  left:0; right:0; top:0;
  height:1px;
  background: linear-gradient(90deg, transparent, rgba(30,53,87,.18), transparent);
  pointer-events:none;
}

.card h2{
  margin:0 0 10px;
  color:var(--brand);
  font-size:16px;
  font-weight:1000;
  letter-spacing:-.2px;
}
.card p{
  margin:0 0 12px;
  color:var(--muted);
  line-height:1.65;
  font-weight:650;
  font-size:14px;
}
.card p:last-child{ margin-bottom:0; }

.pill-row{ display:flex; flex-wrap:wrap; gap:10px; margin:10px 0 14px; }
.pill{
  font-size:12.5px;
  font-weight:1000;
  color:var(--brand);
  background: rgba(30,53,87,.07);
  border:1px solid rgba(30,53,87,.14);
  padding:8px 10px;
  border-radius:999px;
}

/* ===== lists ===== */
ul{ margin:10px 0 0; padding-left:18px; line-height:1.7; color:var(--muted); font-weight:650; }
li{ margin:6px 0; }

/* ===== buttons (more “hardware”) ===== */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  margin-top:12px;
  padding:12px 16px;
  background: linear-gradient(180deg, #25446f 0%, #1E3557 60%, #162a46 100%);
  color:#fff;
  text-decoration:none;
  border-radius:12px;
  font-weight:1000;
  letter-spacing:.2px;
  box-shadow:
    0 18px 36px rgba(30,53,87,.24),
    inset 0 0 0 1px rgba(255,255,255,.16);
  transition: transform .15s ease, filter .15s ease;
  border:none;
  cursor:pointer;
}
.btn:hover{ transform: translateY(-1px); filter:saturate(110%); }
.btn:active{ transform: translateY(0); }

.btn-ghost{
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  margin-top:12px;
  padding:12px 16px;
  background: rgba(255,255,255,.92);
  color: var(--brand);
  text-decoration:none;
  border-radius:12px;
  font-weight:1000;
  border:1px solid rgba(30,53,87,.20);
  box-shadow: 0 10px 24px rgba(6,10,18,.06);
}

/* ===== inputs ===== */
.label{ font-size:12px; font-weight:950; color:var(--muted); margin:10px 0 6px; letter-spacing:.2px; }
.input{
  width:100%;
  max-width:520px;
  padding:12px 12px;
  font-size:15px;
  border:1px solid rgba(15,23,42,.16);
  border-radius:14px;
  outline:none;
  background:#fff;
  font-family: var(--mono);
}
textarea.input{ min-height:120px; resize:vertical; font-family: system-ui,-apple-system,Segoe UI,Arial; }
.input:focus{
  border-color: rgba(30,53,87,.42);
  box-shadow:0 0 0 4px rgba(30,53,87,.12);
}

.helper{ margin:10px 0 0; color:var(--muted); font-weight:650; font-size:13px; line-height:1.6; }

/* ===== accordion ===== */
.accordion{ display:flex; flex-direction:column; gap:10px; }
.acc-item{
  border:1px solid rgba(15,23,42,.16);
  border-radius: 14px;
  overflow:hidden;
  background: rgba(255,255,255,.94);
  box-shadow: var(--shadow3);
}
.acc-btn{
  width:100%;
  text-align:left;
  padding:14px 16px;
  font-weight:1000;
  color: var(--brand);
  background: transparent;
  border:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
}
.acc-btn span{ display:flex; align-items:center; gap:10px; }
.acc-badge{
  font-size:12px;
  font-weight:1000;
  color: var(--brand);
  background: rgba(30,53,87,.07);
  border:1px solid rgba(30,53,87,.14);
  padding:6px 10px;
  border-radius:999px;
}
.acc-icon{
  width:30px; height:30px;
  border-radius:10px;
  display:inline-flex; align-items:center; justify-content:center;
  background: rgba(30,53,87,.07);
  border:1px solid rgba(30,53,87,.14);
  font-weight:1000;
}
.acc-panel{
  display:none;
  padding:0 16px 16px;
}
.acc-item.open .acc-panel{ display:block; }

/* ===== compass ===== */
.compass-wrap{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  padding: 6px 0;
}
#compassSvg{
  width:min(520px, 100%);
  height:auto;
  filter: drop-shadow(0 26px 62px rgba(6,10,18,.16));
}

/* ===== footer ===== */
.footer{
  border-top:1px solid var(--line);
  background: rgba(255,255,255,.92);
  padding:28px 0;
}
.footer-grid{ display:grid; grid-template-columns: 1.4fr .6fr .6fr; gap:16px; }
.footer h4{ margin:0 0 8px; color:var(--brand); font-size:14px; font-weight:1000; }
.footer a{ color:var(--muted); text-decoration:none; font-weight:950; display:block; padding:6px 0; }
.footer a:hover{ color:var(--brand); }
.footer small{ display:block; margin-top:10px; opacity:.95; line-height:1.55; color:var(--muted); }

/* ===== responsive ===== */
@media (max-width: 920px){
  .grid-2{ grid-template-columns:1fr; }
  .grid-3{ grid-template-columns:1fr; }
}
@media (max-width: 860px){
  .nav{ display:none; }
  .burger{ display:inline-flex; }
  .logo-img{ height:72px; }
}
@media (max-width: 420px){
  .logo-img{ height:68px; }
  .page-title{ font-size:30px; }
}