/* Sentinel MDM website. Colors, type and shapes follow the Sentinel PTT
   brand (sentinelptt.com): navy background, Sentinel blue and green,
   Montserrat, pill buttons and gradient cards. */
:root {
  --navy: hsl(220 47% 8%);
  --navy-light: hsl(220 40% 12%);
  --navy-mid: hsl(220 38% 16%);
  --border: hsl(220 30% 20%);
  --fg: hsl(210 40% 95%);
  --muted: hsl(215 20% 60%);
  --blue: hsl(207 72% 46%);
  --blue-light: hsl(207 80% 60%);
  --green: hsl(93 68% 45%);
  --green-light: hsl(93 68% 55%);
  --gradient-primary: linear-gradient(135deg, hsl(207 72% 40%), hsl(207 80% 55%));
  --gradient-cta: linear-gradient(135deg, hsl(93 68% 40%), hsl(93 68% 50%));
  --gradient-hero: linear-gradient(135deg, hsl(220 47% 6%) 0%, hsl(210 50% 12%) 50%, hsl(220 47% 8%) 100%);
  --gradient-card: linear-gradient(145deg, hsl(220 40% 14%), hsl(220 35% 11%));
  --gradient-section: linear-gradient(180deg, hsl(220 47% 8%) 0%, hsl(220 40% 10%) 100%);
  --shadow-card: 0 4px 24px -4px hsl(220 47% 3% / .6);
  --shadow-blue: 0 8px 32px -8px hsl(207 72% 46% / .4);
  --shadow-green: 0 8px 32px -8px hsl(93 68% 45% / .35);
  --radius: .5rem;
  --ease: cubic-bezier(.4, 0, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--navy);
  color: var(--fg);
  font-family: Montserrat, system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--blue-light); }
h1, h2, h3 { margin: 0; line-height: 1.12; }
h1 { font-size: clamp(2.25rem, 6vw, 3.75rem); font-weight: 900; letter-spacing: -.02em; }
h2 { font-size: clamp(1.9rem, 4.2vw, 3rem); font-weight: 900; letter-spacing: -.015em; }
h3 { font-size: 1.15rem; font-weight: 800; }
p { margin: 0; }

.container { width: min(1180px, 100% - 32px); margin-inline: auto; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: hsl(220 47% 8% / .85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid hsl(220 30% 20% / .6);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 68px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-name { font-weight: 900; font-size: 1.35rem; background: var(--gradient-primary); -webkit-background-clip: text; background-clip: text; color: transparent; }
.brand-sub { font-weight: 700; font-size: .7rem; color: var(--green); letter-spacing: .04em; margin-top: 3px; }
.site-nav { display: flex; align-items: center; gap: 22px; }
.site-nav a:not(.btn) { color: var(--muted); text-decoration: none; font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; transition: color .2s var(--ease); }
.site-nav a:not(.btn):hover { color: var(--fg); }
.nav-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.nav-toggle span { display: block; width: 22px; height: 2px; margin: 5px 0; background: var(--fg); border-radius: 2px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .85rem 1.6rem; border-radius: 9999px;
  font-weight: 600; font-size: .95rem; text-decoration: none; color: #fff;
  border: 1px solid transparent; transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn-sm { padding: .55rem 1.1rem; font-size: .8rem; }
.btn-primary { background: var(--gradient-primary); box-shadow: var(--shadow-blue); }
.btn-cta { background: var(--gradient-cta); box-shadow: var(--shadow-green); font-size: 1.05rem; padding: 1rem 2.2rem; }
.btn-ghost { background: hsl(220 40% 12% / .6); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--blue); }

/* Hero */
.hero { background: var(--gradient-hero); padding: clamp(64px, 10vw, 120px) 0 clamp(56px, 8vw, 96px); text-align: center; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -40% -20% auto; height: 120%;
  background: radial-gradient(circle at 50% 30%, hsl(207 80% 55% / .16), transparent 60%);
  pointer-events: none;
}
.hero-inner { position: relative; display: flex; flex-direction: column; align-items: center; gap: 26px; }
.badge {
  display: inline-flex; align-items: center; gap: 8px; padding: .4rem 1rem;
  border: 1px solid var(--border); border-radius: 9999px; background: hsl(220 40% 12% / .7);
  color: var(--blue-light); font-size: .72rem; font-weight: 700; letter-spacing: .06em;
}
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 8px var(--green); }
.lead { max-width: 760px; color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.25rem); }
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; }
.chips { list-style: none; padding: 0; margin: 10px 0 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 26px; color: var(--muted); font-size: .85rem; font-weight: 500; }
.chips li::before { content: ""; display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--blue-light); margin-right: 8px; vertical-align: middle; }

/* Sections */
.section { padding: clamp(64px, 9vw, 112px) 0; }
.section-alt { background: var(--gradient-section); }
.eyebrow { color: var(--blue-light); font-weight: 700; font-size: .78rem; letter-spacing: .1em; margin-bottom: 12px; }
.section-lead { color: var(--muted); font-size: 1.1rem; max-width: 720px; margin-top: 16px; }
.section > .container > h2, .section > .container > .eyebrow, .section > .container > .section-lead { text-align: center; margin-inline: auto; }

.card {
  background: var(--gradient-card); border: 1px solid var(--border); border-radius: calc(var(--radius) * 2);
  padding: 28px; box-shadow: var(--shadow-card); transition: border-color .3s var(--ease), transform .3s var(--ease);
}
.card:hover { border-color: hsl(207 72% 46% / .6); transform: translateY(-2px); }
.card h3 { margin-bottom: 10px; }
.card p { color: var(--muted); font-size: .95rem; }

.steps { list-style: none; padding: 0; margin: 48px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.step-num { display: block; font-size: 2.4rem; font-weight: 900; margin-bottom: 8px; background: var(--gradient-primary); -webkit-background-clip: text; background-clip: text; color: transparent; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 48px; }
.feature h3::before { content: ""; display: block; width: 34px; height: 4px; border-radius: 4px; background: var(--gradient-cta); margin-bottom: 16px; }

.split { display: grid; grid-template-columns: 1fr 1.15fr; gap: 56px; align-items: center; }
.split .btn { margin-top: 28px; }
.checklist { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.checklist li { background: var(--gradient-card); border: 1px solid var(--border); border-radius: calc(var(--radius) * 2); padding: 18px 20px 18px 54px; position: relative; color: var(--muted); font-size: .95rem; }
.checklist li::before {
  content: ""; position: absolute; left: 20px; top: 21px; width: 18px; height: 18px; border-radius: 50%;
  background: var(--gradient-cta) ; box-shadow: var(--shadow-green);
}
.checklist strong { color: var(--fg); }

.cta { text-align: center; background: var(--gradient-hero); border-top: 1px solid var(--border); }
.cta-inner { display: flex; flex-direction: column; align-items: center; gap: 18px; }
.cta .btn { margin-top: 10px; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 36px 0; }
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 12px; text-align: center; }

/* Narrow screens */
@media (max-width: 980px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 36px; }
}
@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .site-nav {
    position: absolute; top: 68px; left: 0; right: 0; display: none; flex-direction: column; align-items: stretch;
    gap: 0; padding: 8px 16px 16px; background: var(--navy-light); border-bottom: 1px solid var(--border);
  }
  .site-nav.open { display: flex; }
  .site-nav a:not(.btn) { padding: 12px 0; font-size: .85rem; }
  .site-nav .btn { margin-top: 8px; }
  .steps, .grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .card { transition: none; }
}