/* Sirius Software Architecture — light enterprise theme */

:root {
  --bg: #ffffff;
  --bg-alt: #f2f4f8;
  --bg-tint: #edf2ff;
  --ink: #161616;
  --ink-dim: #525866;
  --accent: #0f62fe;
  --accent-hover: #0353e9;
  --accent-soft: rgba(15, 98, 254, 0.08);
  --line: #d9dde3;
  --footer-bg: #161616;
  --footer-ink: #c6cad2;

  --maxw: 1080px;
  --pad: 1.25rem;
  --radius: 0;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    "Apple Color Emoji", "Segoe UI Emoji", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: var(--pad);
}
.container.narrow { max-width: 720px; }
.center { text-align: center; }

.skip-link {
  position: absolute;
  left: -999px;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
  background: var(--accent);
  color: #fff;
  padding: 0.5rem 0.9rem;
  border-radius: 0;
  z-index: 100;
}

/* Header / nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; }
.brand-mark { color: var(--accent); font-size: 1.1rem; }
.brand-name { font-size: 1.15rem; color: var(--ink); }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}
.nav-menu a { color: var(--ink-dim); font-size: 0.95rem; }
.nav-menu a:hover { color: var(--accent); text-decoration: none; }
.nav-cta {
  color: #fff !important;
  background: var(--accent);
  padding: 0.55rem 1.1rem;
  border-radius: 0;
}
.nav-cta:hover { background: var(--accent-hover); text-decoration: none; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle-bar {
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.4rem;
  border-radius: 0;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { color: var(--ink); border: 1px solid var(--ink); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-lg { padding: 0.95rem 1.8rem; font-size: 1.05rem; }

/* Hero */
.hero {
  padding: clamp(4rem, 10vw, 7rem) 0 clamp(3rem, 7vw, 5rem);
  background:
    linear-gradient(180deg, var(--accent-soft), transparent 260px),
    var(--bg);
  border-bottom: 1px solid var(--line);
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  margin: 0 0 1rem;
}
.hero h1 {
  font-size: clamp(2.2rem, 5.5vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 1.1rem;
  max-width: 18ch;
}
.lede {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: var(--ink-dim);
  max-width: 56ch;
  margin: 0 0 2rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.8rem; }

/* Sections */
.section { padding: clamp(3.5rem, 8vw, 6rem) 0; }
.section-alt { background: var(--bg-alt); border-block: 1px solid var(--line); }
.section-title {
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}
.section-sub { color: var(--ink-dim); margin: 0 0 2.5rem; max-width: 60ch; }

/* Service cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.25rem;
}
.card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-top: 3px solid var(--line);
  border-radius: 0;
  padding: 1.6rem;
  transition: border-top-color 0.2s ease;
}
.card:hover { border-top-color: var(--accent); }
.card-icon { color: var(--accent); font-size: 1rem; }
.card h3 { margin: 0.6rem 0 0.5rem; font-size: 1.15rem; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--ink-dim); font-size: 0.95rem; }

/* Steps */
.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.5rem;
  counter-reset: step;
}
.step { position: relative; padding-top: 1rem; border-top: 3px solid var(--accent); }
.step-num {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent);
}
.step h3 { margin: 0.4rem 0 0.4rem; font-size: 1.2rem; letter-spacing: -0.01em; }
.step p { margin: 0; color: var(--ink-dim); }

/* Pull quote */
.quote-band { padding: clamp(3rem, 7vw, 5rem) 0; }
.quote-band blockquote {
  margin: 0;
  font-size: clamp(1.7rem, 4.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.quote-band .accent { color: var(--accent); }
.quote-attribution { color: var(--ink-dim); margin-top: 0.9rem; font-size: 0.95rem; }

/* Product spotlight */
.product-spotlight {
  background: var(--bg-tint);
  border-block: 1px solid var(--line);
}
.feature-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 2rem;
}
.feature-list li {
  position: relative;
  padding-left: 1.6rem;
  margin-bottom: 0.6rem;
  color: var(--ink-dim);
}
.feature-list li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* About */
#about p { color: var(--ink-dim); font-size: 1.05rem; }

/* Footer */
.site-footer {
  border-top: 3px solid var(--accent);
  padding: 2.5rem 0;
  background: var(--footer-bg);
}
.site-footer .brand-name { color: #fff; }
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.footer-copy { color: var(--footer-ink); font-size: 0.9rem; margin: 0; }
.footer-links { display: flex; gap: 1.2rem; }
.footer-links a { color: var(--footer-ink); font-size: 0.9rem; }
.footer-links a:hover { color: #fff; text-decoration: none; }

/* Responsive */
@media (max-width: 760px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
    padding: 1rem var(--pad) 1.5rem;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    display: none;
  }
  .nav-menu.open { display: flex; }
  .nav-menu a { padding: 0.5rem 0; width: 100%; }
  .nav-cta { margin-top: 0.5rem; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}