/* OSS Technologies — marketing site */
:root {
  --bg: #0f1419;
  --bg-elev: #171e26;
  --bg-card: #1c2430;
  --border: #2a3544;
  --text: #e8eef4;
  --muted: #9aabbc;
  --accent: #3d9cf0;
  --accent-2: #2dd4a8;
  --accent-dim: rgba(61, 156, 240, 0.15);
  --warn: #f0b429;
  --radius: 12px;
  --max: 1100px;
  --font: "Segoe UI", system-ui, -apple-system, Roboto, Ubuntu, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }

.wrap {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(15, 20, 25, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
  flex-wrap: wrap;
}
.logo {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.logo span { color: var(--accent-2); }
.logo:hover { text-decoration: none; }

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  align-items: center;
}
.nav a {
  color: var(--muted);
  font-size: 0.92rem;
  text-decoration: none;
  padding: 0.25rem 0;
}
.nav a:hover, .nav a.active { color: var(--text); }
.nav .btn-portal {
  background: var(--accent);
  color: #061018 !important;
  font-weight: 600;
  padding: 0.45rem 0.9rem;
  border-radius: 8px;
  text-decoration: none !important;
}
.nav .btn-portal:hover { filter: brightness(1.08); }

/* Hero */
.hero {
  padding: 3.5rem 0 2.5rem;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(ellipse 80% 60% at 70% -10%, rgba(61, 156, 240, 0.18), transparent 55%),
    radial-gradient(ellipse 50% 40% at 10% 80%, rgba(45, 212, 168, 0.08), transparent 50%);
}
.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.45rem);
  line-height: 1.2;
  margin: 0 0 1rem;
  letter-spacing: -0.03em;
  max-width: 18ch;
}
.hero .lead {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 52ch;
  margin: 0 0 1.75rem;
}
.tagline {
  display: inline-block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-2);
  margin-bottom: 0.75rem;
}

/* Buttons */
.btn-row { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.25rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  text-decoration: none !important;
  transition: filter 0.15s, background 0.15s;
}
.btn-primary { background: var(--accent); color: #061018; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--muted); background: var(--bg-elev); }
.btn-ghost {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid transparent;
}
.btn-ghost:hover { border-color: var(--accent); }

/* Sections */
main { flex: 1; }
section { padding: 2.75rem 0; }
section + section { border-top: 1px solid var(--border); }
h2 {
  font-size: clamp(1.35rem, 2.5vw, 1.7rem);
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}
h3 { font-size: 1.1rem; margin: 0 0 0.5rem; }
.muted { color: var(--muted); }
.section-intro { color: var(--muted); max-width: 60ch; margin: 0 0 1.5rem; }

/* Cards */
.grid {
  display: grid;
  gap: 1.15rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; flex: 1; }
.card a.card-link {
  font-weight: 600;
  font-size: 0.9rem;
  margin-top: 0.35rem;
}
.card .icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--accent-dim);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
}

/* Lists */
ul.clean {
  margin: 0 0 1.25rem;
  padding-left: 1.15rem;
  color: var(--muted);
}
ul.clean li { margin-bottom: 0.4rem; }
ul.clean li::marker { color: var(--accent-2); }

/* Table */
.table-wrap { overflow-x: auto; margin: 1rem 0 1.5rem; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
th, td {
  text-align: left;
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border);
}
th { color: var(--muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; }
td { color: var(--text); }

/* Proof strip */
.proof {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin-top: 0.5rem;
}
.proof-item {
  padding: 1rem 1.1rem;
  background: var(--bg-elev);
  border-radius: var(--radius);
  border-left: 3px solid var(--accent-2);
  font-size: 0.92rem;
  color: var(--muted);
}

/* CTA band */
.cta-band {
  background: linear-gradient(135deg, var(--bg-elev), var(--bg-card));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  text-align: center;
}
.cta-band p { margin: 0 0 1.1rem; color: var(--muted); }

/* Contact form (mailto-based) */
.form-grid {
  display: grid;
  gap: 1rem;
  max-width: 560px;
}
label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.3rem;
}
input, select, textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font: inherit;
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
textarea { min-height: 120px; resize: vertical; }
.form-note { font-size: 0.85rem; color: var(--muted); margin-top: 0.75rem; }

.sidebar-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-top: 1.5rem;
  max-width: 560px;
}
.contact-layout {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
}
@media (min-width: 800px) {
  .contact-layout { grid-template-columns: 1.2fr 0.8fr; align-items: start; }
}

/* Footer */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
  padding: 2rem 0 2.5rem;
  background: #0b0f13;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
  justify-content: space-between;
}
.footer-brand { font-weight: 600; margin-bottom: 0.35rem; }
.footer-meta { font-size: 0.85rem; color: var(--muted); }
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}
.footer-links a { color: var(--muted); font-size: 0.9rem; }
.footer-links a:hover { color: var(--text); }

/* Page title (inner pages) */
.page-hero {
  padding: 2.5rem 0 1.5rem;
  border-bottom: 1px solid var(--border);
}
.page-hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  letter-spacing: -0.02em;
}
.page-hero .lead { color: var(--muted); max-width: 55ch; margin: 0; }

.content { padding: 2rem 0 3rem; }
.content .prose { max-width: 68ch; }
.content .prose p { color: var(--muted); }

.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  background: rgba(45, 212, 168, 0.15);
  color: var(--accent-2);
}

@media (max-width: 640px) {
  .nav { width: 100%; }
  .nav .btn-portal { margin-top: 0.25rem; }
}