/* Inova System -- static site stylesheet */

@font-face {
  font-family: 'Roboto';
  font-style: normal;
  font-weight: 400;
  src: url('../fonts/roboto-400.ttf') format('truetype');
  font-display: swap;
}
@font-face {
  font-family: 'Roboto';
  font-style: normal;
  font-weight: 700;
  src: url('../fonts/roboto-700.ttf') format('truetype');
  font-display: swap;
}
@font-face {
  font-family: 'Roboto Slab';
  font-style: normal;
  font-weight: 400;
  src: url('../fonts/robotoslab-400.ttf') format('truetype');
  font-display: swap;
}
@font-face {
  font-family: 'Roboto Slab';
  font-style: normal;
  font-weight: 700;
  src: url('../fonts/robotoslab-700.ttf') format('truetype');
  font-display: swap;
}

:root {
  --color-primary: #272748;
  --color-accent: #5b5aa5;
  --color-accent-light: #8a88fa;
  --color-bg: #ffffff;
  --color-bg-alt: #f6f6f6;
  --color-text: #33333d;
  --color-text-muted: #62626e;
  --color-border: #e2e2ea;
  --color-footer-bg: #272748;
  --color-footer-text: #c9c9dc;
  --max-width: 1080px;
  --radius: 8px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Roboto', Arial, Helvetica, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

h1, h2, h3, h4 {
  font-family: 'Roboto Slab', Georgia, serif;
  color: var(--color-primary);
  line-height: 1.3;
  margin: 0 0 0.6em;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; margin-top: 1.6em; }
h3 { font-size: 1.15rem; margin-top: 1.4em; }

p { margin: 0 0 1em; }

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

ul, ol { padding-left: 1.4em; }
li { margin-bottom: 0.4em; }

img { max-width: 100%; height: auto; display: block; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
}
.skip-link:focus {
  left: 10px;
  top: 10px;
  background: #fff;
  padding: 8px 12px;
  z-index: 1000;
  border-radius: var(--radius);
}

/* Header / nav */
.site-header {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 68px;
}

.logo {
  font-family: 'Roboto Slab', Georgia, serif;
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--color-primary);
  text-decoration: none;
  white-space: nowrap;
}
.logo:hover { text-decoration: none; }
.logo .tagline {
  display: block;
  font-family: 'Roboto', sans-serif;
  font-weight: 400;
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1.4rem;
  line-height: 1;
  padding: 6px 12px;
  cursor: pointer;
  color: var(--color-primary);
}

.main-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 4px;
}

.main-nav > ul > li {
  position: relative;
}

.main-nav a {
  display: block;
  padding: 12px 14px;
  color: var(--color-primary);
  font-weight: 500;
  border-radius: var(--radius);
}

.main-nav > ul > li > a:hover,
.main-nav > ul > li.open > a {
  background: var(--color-accent);
  color: #fff;
  text-decoration: none;
}

.main-nav .sub-menu {
  display: none;
  position: absolute;
  left: 0;
  top: 100%;
  background: var(--color-accent-light);
  min-width: 260px;
  padding: 6px;
  border-radius: var(--radius);
  box-shadow: 0 8px 20px rgba(39,39,72,0.18);
}

.main-nav .sub-menu .sub-menu {
  position: static;
  box-shadow: none;
  margin-top: 4px;
  background: rgba(255,255,255,0.15);
}

.main-nav li.open > .sub-menu { display: block; }

@media (min-width: 821px) {
  .main-nav li.has-children:hover > .sub-menu { display: block; }
}

.main-nav .sub-menu a {
  color: #fff;
  padding: 10px 12px;
}
.main-nav .sub-menu a:hover {
  background: rgba(255,255,255,0.2);
  text-decoration: none;
}

.main-nav .has-children > a::after {
  content: ' \25BE';
  font-size: 0.7em;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  padding: 64px 0;
}
.hero h1 { color: #fff; margin-bottom: 0.3em; }
.hero p { color: #d8d8f5; font-size: 1.1rem; max-width: 640px; }
.hero .btn { margin-top: 12px; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 22px;
  background: #25D366;
  color: #fff;
  border-radius: var(--radius);
  font-weight: 700;
  text-decoration: none;
}
.btn:hover { background: #1ebe5b; text-decoration: none; }
.btn-outline {
  background: transparent;
  border: 2px solid #fff;
  color: #fff;
}
.btn-outline:hover { background: #fff; color: var(--color-primary); }

/* Cards / feature grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
  margin: 24px 0;
}
.card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
}
.card h3 { margin-top: 0; }

/* Main content area */
main { padding: 40px 0 60px; }
main.page > .container { max-width: 820px; }

.breadcrumb {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 18px;
}
.breadcrumb a { color: var(--color-text-muted); }

/* Steps / how-to lists */
.steps {
  counter-reset: step;
  list-style: none;
  padding-left: 0;
}
.steps > li {
  counter-increment: step;
  position: relative;
  padding-left: 40px;
  margin-bottom: 14px;
}
.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1em 0;
}
th, td {
  border: 1px solid var(--color-border);
  padding: 8px 10px;
  text-align: left;
}
th { background: var(--color-bg-alt); }

code, pre {
  font-family: Consolas, Menlo, monospace;
  background: var(--color-bg-alt);
  border-radius: 4px;
}
code { padding: 2px 6px; }
pre {
  padding: 14px;
  overflow-x: auto;
  border: 1px solid var(--color-border);
}

.contact-box {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  margin: 20px 0;
}
.contact-box a.btn { margin-top: 8px; }

.note {
  background: #fff8e6;
  border: 1px solid #f0d78c;
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 0.92rem;
}

/* Footer */
.site-footer {
  background: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: 36px 0 20px;
  margin-top: 40px;
}
.site-footer a { color: #fff; }
.footer-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255,255,255,0.15);
}
.footer-grid h4 { color: #fff; margin-bottom: 0.6em; font-size: 1rem; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 6px; }
.site-footer .copyright {
  text-align: center;
  font-size: 0.82rem;
  padding-top: 16px;
  color: rgba(255,255,255,0.6);
}

@media (max-width: 820px) {
  .nav-toggle { display: inline-block; }
  .main-nav {
    display: none;
    width: 100%;
    order: 3;
  }
  .site-header .container { flex-wrap: wrap; }
  .main-nav.open { display: block; }
  .main-nav > ul { flex-direction: column; }
  .main-nav .sub-menu { position: static; box-shadow: none; }
  .hero { padding: 40px 0; }
}