:root {
  --bg: #141b24;
  --panel: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --primary: #4f46e5;
  --primary-600: #4338ca;
  --border: #1f2937;
  --radius: 12px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Noto Sans, Arial, sans-serif;
  /* Background: base color, soft glow gradients, and a subtle grid */
  background-color: var(--bg);
  background-image:
    radial-gradient(900px 600px at 20% -10%, rgba(79, 70, 229, 0.36), rgba(13,17,23,0)),
    radial-gradient(700px 500px at 80% 0%, rgba(16, 185, 129, 0.28), rgba(13,17,23,0)),
    url('/assets/img/bg-grid.svg');
  background-repeat: no-repeat, no-repeat, repeat;
  background-size: cover, cover, 40px 40px;
  background-position: center top, right top, top left;
  background-attachment: fixed, fixed, fixed;
  color: var(--text);
  line-height: 1.6;
}

.container {
  width: 100%;
  max-width: 1100px;
  padding: 0 20px;
  margin: 0 auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0; z-index: 50;
  backdrop-filter: blur(8px);
  background: rgba(13,17,23,0.7);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  font-weight: 700;
  letter-spacing: 0.2px;
  color: var(--text);
  text-decoration: none;
}
.nav { display: flex; gap: 18px; align-items: center; }
.nav a { color: var(--muted); text-decoration: none; font-weight: 500; }
.nav a:hover { color: var(--text); }

/* Sections */
.hero {
  padding: 96px 0 72px;
  text-align: left;
}
.hero h1 { font-size: 42px; line-height: 1.2; margin: 0 0 12px; }
.hero p { color: var(--muted); max-width: 720px; margin: 0 0 24px; }
.actions { display: flex; gap: 12px; }

.section { padding: 56px 0; }
.section#about, #about.section, #about { padding-top: 20px; }
.section.alt { background: var(--panel); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* Cards & Lists */
.card {
  background: #0f172a;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 16px;
}
.list, .checks { padding-left: 18px; margin: 10px 0 0; }
.checks li { list-style: none; position: relative; margin: 8px 0; }
.checks li::before { content: "✔"; color: var(--primary); margin-right: 8px; }

/* Grid */
.grid { display: grid; gap: 16px; }
.grid.two { grid-template-columns: repeat(1, 1fr); }
.grid.three { grid-template-columns: repeat(1, 1fr); }
@media (min-width: 768px) {
  .grid.two { grid-template-columns: repeat(2, 1fr); }
  .grid.three { grid-template-columns: repeat(3, 1fr); }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { background: #111827; }
.btn.primary { background: var(--primary); border-color: var(--primary); }
.btn.primary:hover { background: var(--primary-600); border-color: var(--primary-600); }

/* Forms */
form.contact { margin-top: 12px; }
label { display: block; margin: 10px 0; }
label span { display: block; font-size: 14px; color: var(--muted); margin-bottom: 6px; }
input, textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0b1220;
  color: var(--text);
}
input:focus, textarea:focus { outline: none; border-color: var(--primary); }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  color: var(--muted);
}
.site-footer .container { display: flex; gap: 10px; align-items: center; }
.sep { opacity: 0.6; }