:root {
  --bg: #0f172a;         /* A dark blue-gray */
  --panel: #1e293b;      /* A slightly lighter blue-gray */
  --surface: #334155;    /* A card/surface color */
  --text: #e2e8f0;       /* A light, off-white text color */
  --muted: #94a3b8;      /* Muted text for secondary info */
  --brand: #34d399;      /* A vibrant green for accents */
  --brand-hover: #10b981;
  --border: #475569;     /* Border color */
  --shadow: 0 10px 25px rgba(0,0,0,.35);
  --font-sans: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; height: auto; display: block; }
h1, h2, h3 { line-height: 1.2; }
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-hover); text-decoration: underline; }

.skip-link {
  position: absolute;
  top: 0;
  left: -9999px;
  padding: 0.5rem 1rem;
  background: var(--surface);
  color: var(--text);
  z-index: 1000;
}
.skip-link:focus { left: 0; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  height: 60px;
  padding: 0 1rem;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: center; gap: 0.75rem; }
.brand-logo { width: 32px; height: 32px; border-radius: 8px; }
.brand-name { font-weight: 600; font-size: 1.1rem; }

.sidebar-toggle {
  display: none; /* Hidden by default on large screens */
  width: 40px; height: 40px;
  border-radius: 8px;
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--surface);
  cursor: pointer;
  font-size: 1.5rem;
}
.sidebar-toggle:hover { background: var(--border); }

.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: calc(100vh - 60px);
}

.sidebar {
  position: sticky;
  top: 60px;
  height: calc(100vh - 60px);
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 1.5rem 1rem;
  overflow-y: auto;
}

.nav-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.5rem; }
.nav-list a {
  display: block;
  padding: 0.6rem 1rem;
  border-radius: 8px;
  color: var(--text);
}
.nav-list a:hover { background: var(--surface); text-decoration: none; }
.nav-list a[aria-current="page"] { background: var(--brand); color: var(--bg); font-weight: 600; }

.content { padding: 2rem clamp(1rem, 5vw, 3rem); }

.site-footer { border-top: 1px solid var(--border); background: var(--panel); }
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem clamp(1rem, 5vw, 3rem);
  color: var(--muted);
}
.site-footer nav { display: flex; gap: 1rem; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--text); }

.page-header { margin-bottom: 2rem; }
.page-header h1 { font-size: 2.5rem; }
.page-header .lead { font-size: 1.1rem; color: var(--muted); max-width: 65ch; }

.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
  margin-bottom: 3rem;
}
.hero-text p { color: var(--muted); font-size: 1.1rem; max-width: 55ch; }
.hero-actions { display: flex; gap: 1rem; margin-top: 1.5rem; }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.feature { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 1.5rem; }

.media-block { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }

.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.card img { aspect-ratio: 16 / 9; object-fit: contain; }
.card-body { padding: 1.5rem; flex-grow: 1; display: flex; flex-direction: column; }
.card-title { margin: 0 0 0.5rem; }
.card p { margin: 0 0 1rem; color: var(--muted); flex-grow: 1; }

.faq details {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  margin-bottom: 1rem;
}
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { margin: 1rem 0 0; color: var(--muted); }

.contact-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
.form { background: var(--panel); border-radius: 12px; padding: 2rem; border: 1px solid var(--border); }
.form-row { margin-bottom: 1.25rem; }
.form-row label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
.form-row input, .form-row textarea {
  width: 100%;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
}
.form-row input:focus, .form-row textarea:focus { outline: 2px solid var(--brand); border-color: var(--brand); }

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  cursor: pointer;
}
.btn.primary { background: var(--brand); color: var(--bg); border-color: var(--brand); }
.btn:hover { filter: brightness(1.1); text-decoration: none; }
.btn.primary:hover { background: var(--brand-hover); }

/* Responsive */
@media (max-width: 1024px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar-toggle { display: block; }
  .sidebar {
    position: fixed;
    top: 60px;
    left: 0;
    width: 280px;
    transform: translateX(-100%);
    transition: transform 300ms ease;
    z-index: 60;
  }
  .sidebar.open { transform: translateX(0); box-shadow: var(--shadow); }
  .hero, .media-block, .contact-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
}