/*
  Shiva Technologies - Responsive styles
  Color palette: Deep blue primary, amber accent, slate neutrals
*/

:root {
  --primary: #0b3d91;
  --primary-dark: #072b67;
  --accent: #f9a825;
  --text: #1f2937;
  --muted: #6b7280;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --card: #ffffff;
  --border: #e5e7eb;
}

/* Reset & base */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

.skip-link { position: absolute; left: -999px; top: -999px; }
.skip-link:focus { left: 1rem; top: 1rem; background: var(--accent); color: #000; padding: .5rem 1rem; border-radius: .25rem; }

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  text-decoration: none;
  color: var(--primary-dark);
  font-weight: 700;
}
.logo img { width: 28px; height: 28px; }

.nav ul {
  display: flex;
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav a {
  text-decoration: none;
  color: var(--text);
  padding: .5rem .75rem;
  border-radius: .35rem;
}
.nav a:hover { background: var(--bg-alt); }
.nav a[aria-current="page"] { color: var(--primary); font-weight: 600; }

.menu-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--bg);
  padding: .5rem;
  border-radius: .35rem;
}
.menu-toggle .bar { display: block; width: 22px; height: 2px; background: var(--text); margin: 4px 0; }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--bg-alt), #eef2ff);
  padding: 3rem 0;
  border-bottom: 1px solid var(--border);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 2rem;
  align-items: center;
}
.hero h1 { font-size: clamp(1.8rem, 3vw, 2.6rem); color: var(--primary-dark); margin: 0 0 .5rem; }
.hero p { color: var(--muted); }
.hero-actions { margin-top: 1rem; display: flex; gap: .75rem; }
.hero-art img { width: 100%; max-width: 480px; }

/* Sections */
.section-title { font-size: 1.6rem; margin: 2rem 0 1rem; color: var(--primary-dark); }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: .5rem;
  padding: 1rem;
  box-shadow: 0 1px 2px rgba(0,0,0,.04);
}
.card h3, .card h2 { margin-top: 0; }

.list { padding-left: 1rem; }
.list.compact { padding-left: 1rem; margin: .5rem 0 0; }
.list li { margin: .25rem 0; }

.cta {
  background: var(--primary-dark);
  color: #fff;
  padding: 2rem 0;
}
.cta-inner { text-align: center; }
.cta .btn-primary { background: #fff; color: var(--primary-dark); }

/* Page hero */
.page-hero { background: var(--bg-alt); border-bottom: 1px solid var(--border); padding: 2rem 0; }

/* Grid helpers */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.project-grid { margin: 1rem 0 2rem; }

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}
.form-row { display: grid; gap: .25rem; margin-bottom: .75rem; }
.form-row input, .form-row textarea, .form-row select {
  border: 1px solid var(--border);
  border-radius: .35rem;
  padding: .5rem .6rem;
  font: inherit;
}
.form-actions { margin-top: .5rem; }
.form-status { margin-top: .5rem; color: var(--primary-dark); }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg);
  margin-top: 2rem;
}
.footer-inner { padding: 1rem 0; }
.footer-contact a { color: var(--text); }
.copyright { color: var(--muted); }

/* Buttons */
.btn {
  display: inline-block;
  padding: .6rem 1rem;
  border-radius: .4rem;
  text-decoration: none;
  border: 1px solid var(--border);
}
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-secondary { background: #fff; color: var(--primary-dark); }
.btn:hover { filter: brightness(0.98); }

/* Responsive nav */
@media (max-width: 800px) {
  .menu-toggle { display: inline-block; }
  .nav { position: absolute; left: 0; right: 0; top: 64px; background: var(--bg); border-bottom: 1px solid var(--border); display: none; }
  .nav.open { display: block; }
  .nav ul { flex-direction: column; padding: .5rem; }
}

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-art { display: none; }
}