/* Shared styles for getrealos.com (home, about, privacy).
   Colors and type follow the RealOS brand guide (branding/). */
:root {
  color-scheme: light dark;
  /* Brand palette */
  --navy: #0b2d4a;
  --navy-2: #0f3a5e;
  --navy-3: #114d80;
  --cyan: #00c4f0;
  --cloud: #f4f7fa;
  --slate: #647488;

  --bg: #ffffff;
  --bg-alt: var(--cloud);
  --fg: var(--navy);
  --muted: var(--slate);
  --line: #e1e8ef;
  --link: #007aa3; /* cyan dark enough for text on white */
  --btn: var(--navy);
  --btn-ink: #ffffff;
  --tint: color-mix(in srgb, var(--cyan) 14%, transparent);
  --card: #ffffff;
  --radius: 14px;
  --max: 1120px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #071e33;
    --bg-alt: var(--navy);
    --fg: var(--cloud);
    --muted: #9db0c4;
    --line: #1a4266;
    --link: var(--cyan);
    --btn: var(--cyan);
    --btn-ink: var(--navy);
    --tint: color-mix(in srgb, var(--cyan) 16%, transparent);
    --card: var(--navy);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
}
a { color: var(--link); }
img { max-width: 100%; display: block; }
h1, h2, h3 { font-weight: 700; }

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

/* Logo lockup: mark + "Real" + cyan "OS" */
.brand { display: flex; align-items: center; gap: 10px; color: var(--fg); text-decoration: none; }
.brand-mark { width: 34px; height: 34px; }
.brand-word { display: flex; flex-direction: column; line-height: 1; }
.brand-name { font-weight: 800; font-size: 1.35rem; letter-spacing: -.03em; }
.brand-name b { color: var(--cyan); font-weight: 800; }
.brand-tag { font-size: .52rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); margin-top: 4px; }
@media (max-width: 420px) { .brand-tag { display: none; } }

/* Header */
.site-header { border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(8px); position: sticky; top: 0; z-index: 10; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 68px; }
.nav { display: flex; align-items: center; gap: 22px; }
.nav a { color: var(--muted); text-decoration: none; font-weight: 500; font-size: .95rem; }
.nav a:hover { color: var(--fg); }
.nav a.btn { color: var(--btn-ink); }
@media (max-width: 640px) { .nav .nav-link { display: none; } }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 10px; font-weight: 600; text-decoration: none; font-size: .95rem; border: 1px solid transparent; transition: filter .15s, background .15s; }
.btn-primary { background: var(--btn); color: var(--btn-ink); }
.btn-primary:hover { filter: brightness(1.15); }
.btn-ghost { border-color: var(--line); color: var(--fg); }
.btn-ghost:hover { background: var(--bg-alt); }
.btn-sm { padding: 8px 16px; font-size: .88rem; }
/* On navy bands, whatever the color scheme */
.on-navy .btn-primary { background: var(--cyan); color: var(--navy); }
.on-navy .btn-ghost { border-color: rgba(255, 255, 255, .3); color: #fff; }
.on-navy .btn-ghost:hover { background: rgba(255, 255, 255, .08); }

/* Navy band (hero, CTA) */
.on-navy {
  color: #fff;
  background:
    radial-gradient(800px 380px at 85% 0%, color-mix(in srgb, var(--cyan) 22%, transparent), transparent 70%),
    linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 55%, var(--navy-3) 100%);
}
.on-navy p { color: #c9d6e3; }
.hl { color: var(--cyan); }

/* Hero */
.hero { padding: 96px 0 0; }
.hero-grid { display: grid; gap: 48px; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); align-items: center; padding-bottom: 88px; }
@media (max-width: 860px) { .hero-grid { grid-template-columns: 1fr; } }
.eyebrow { display: inline-block; font-size: .78rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--cyan); }
.hero h1 { font-size: clamp(2.6rem, 7vw, 4.4rem); line-height: 1.02; letter-spacing: -.035em; margin: 14px 0 20px; }
.hero h1 .hl { display: block; }
.hero p.lead { font-size: clamp(1.05rem, 2.2vw, 1.25rem); max-width: 38rem; margin: 0 0 30px; }
.hero .actions { display: flex; gap: 12px; flex-wrap: wrap; }

.pillars { list-style: none; margin: 0; padding: 0 0 0 36px; border-left: 1px solid rgba(255, 255, 255, .18); display: grid; gap: 26px; }
@media (max-width: 860px) { .pillars { border-left: 0; padding: 0; } }
.pillars li { display: grid; grid-template-columns: 36px 1fr; gap: 14px; align-items: start; }
.pillars svg { width: 30px; height: 30px; color: var(--cyan); }
.pillars strong { display: block; font-size: 1.1rem; color: #fff; }
.pillars span { color: #c9d6e3; font-size: .95rem; }

/* Sections */
section.block { padding: 80px 0; }
section.block.alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 42rem; margin: 0 auto 44px; }
.kicker { display: block; font-size: .75rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--link); margin-bottom: 10px; }
.section-head h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); letter-spacing: -.025em; line-height: 1.15; margin: 0 0 10px; }
.section-head p { color: var(--muted); margin: 0; }

.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; transition: border-color .15s, transform .15s; }
.card:hover { border-color: color-mix(in srgb, var(--cyan) 50%, var(--line)); transform: translateY(-2px); }
.card h3 { margin: 14px 0 6px; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); font-size: .95rem; }
.icon { width: 44px; height: 44px; border-radius: 11px; display: grid; place-items: center; background: var(--tint); color: var(--link); }
.icon svg { width: 24px; height: 24px; }

.split { display: grid; gap: 40px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); align-items: center; }
.split h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); letter-spacing: -.025em; line-height: 1.15; margin: 0 0 14px; }
.split p { color: var(--muted); }
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.checks li { display: flex; gap: 12px; align-items: flex-start; }
.checks li::before { content: ""; flex: 0 0 22px; height: 22px; margin-top: 2px; border-radius: 7px; background: var(--cyan) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%230b2d4a'%3E%3Cpath d='M8.1 13.6 4.5 10l1.2-1.2 2.4 2.4 6.2-6.2 1.2 1.2z'/%3E%3C/svg%3E") center/15px no-repeat; }

.cta { text-align: center; padding: 80px 0; }
.cta h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); letter-spacing: -.025em; margin: 0 0 10px; }
.cta p { margin: 0 auto 26px; max-width: 34rem; }

/* Long-form pages (about, privacy) */
.page-head { padding: 64px 0 56px; }
.page-head h1 { font-size: clamp(2.1rem, 5vw, 3rem); letter-spacing: -.03em; line-height: 1.08; margin: 10px 0 10px; max-width: 46rem; }
.page-head p { margin: 0; max-width: 40rem; font-size: 1.1rem; }
.page { max-width: 46rem; margin: 0 auto; padding: 48px 20px 80px; }
.page .updated { color: var(--muted); font-size: .9rem; margin: 0 0 28px; }
.page h2 { font-size: 1.25rem; margin: 36px 0 8px; letter-spacing: -.01em; }
.page p, .page li { color: var(--fg); }
.page ul { padding-left: 1.25rem; }
.page li { margin: 4px 0; }
.page li::marker { color: var(--cyan); }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 36px 0 44px; color: var(--muted); font-size: .9rem; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 20px 28px; justify-content: space-between; align-items: center; }
.site-footer nav { display: flex; gap: 20px; flex-wrap: wrap; }
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--fg); }
.site-footer .motto { width: 100%; font-size: .72rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; }