/* CoreStream Services: brand colours per RULINGS.md */
:root {
  --navy: #0E1C2C;
  --navy-2: #16273b;
  --blue: #0055B2;
  --blue-light: #6fa8e8;
  --grey: #5A6570;
  --ink: #0E1C2C;
  --line: #dde3ea;
  --bg: #ffffff;
  --bg-alt: #f4f6f9;
  --radius: 10px;
  --header-h: 60px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  color: var(--grey);
  background: var(--bg);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); }
h1, h2, h3 { color: var(--ink); line-height: 1.2; margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 7vw, 3.2rem); letter-spacing: -.01em; }
h2 { font-size: clamp(1.5rem, 5vw, 2.1rem); }
h3 { font-size: 1.12rem; }
p { margin: 0 0 1em; }
section[id] { scroll-margin-top: calc(var(--header-h) + 12px); }

.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 16px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: var(--navy);
  border-bottom: 3px solid var(--blue);
}
.header-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: var(--header-h); }
.brand img { height: 26px; width: auto; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 22px; border-radius: 8px;
  font: 600 1rem/1 var(--font); text-decoration: none; cursor: pointer;
  border: 2px solid transparent; transition: background .15s, border-color .15s;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: #00478f; }
.btn-ghost { background: transparent; color: var(--blue); border-color: var(--blue); }
.btn-ghost:hover { background: rgba(0, 85, 178, .08); }
.btn-call-sm { min-height: 44px; padding: 0 18px; background: var(--blue); color: #fff; }
.btn-block { width: 100%; }
.btn-row { display: flex; flex-direction: column; gap: 12px; margin-top: 28px; }
.btn-col { display: flex; flex-direction: column; gap: 12px; margin-top: 20px; }

/* Hero */
.hero { background: var(--navy); color: #c9d3de; padding: 48px 0 56px; }
.hero h1 { color: #fff; }
.hero .eyebrow { color: var(--blue-light); }
.hero-lead { color: #fff; font-size: 1.2rem; font-weight: 600; border-left: 4px solid var(--blue); padding-left: 14px; }
.hero-body { max-width: 760px; }
.hero .btn-ghost { color: #fff; border-color: rgba(255, 255, 255, .6); }
.hero .btn-ghost:hover { background: rgba(255, 255, 255, .08); }

/* Sections */
.section { padding: 56px 0; }
.section-alt { background: var(--bg-alt); }
.eyebrow {
  text-transform: uppercase; letter-spacing: .14em; font-size: .78rem; font-weight: 700;
  color: var(--blue); margin-bottom: 10px;
}
.section-intro { max-width: 720px; }
.note { margin-top: 24px; color: var(--ink); font-weight: 500; }

.check-list { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 14px; }
.check-list li {
  position: relative; padding: 16px 16px 16px 46px; background: var(--bg-alt);
  border-radius: var(--radius); color: var(--ink);
}
.check-list li::before {
  content: ""; position: absolute; left: 16px; top: 21px; width: 16px; height: 16px;
  border-radius: 50%; background: var(--blue);
  box-shadow: inset 0 0 0 4px #cfe0f5;
}

/* Services */
.service-grid { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 14px; }
.service {
  background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--blue);
  border-radius: var(--radius); padding: 20px;
}
.service p { margin: 0; }
.svc-num { display: block; font-weight: 700; color: var(--blue); font-size: .85rem; letter-spacing: .1em; margin-bottom: 6px; }
.service-lead { border-left-color: var(--navy); }
.tag {
  display: inline-block; margin-left: 6px; padding: 2px 9px; border-radius: 999px;
  background: var(--blue); color: #fff; font-size: .7rem; font-weight: 700;
  letter-spacing: .05em; text-transform: uppercase; vertical-align: middle;
}

/* Failure analysis steps */
.steps { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 14px; counter-reset: s; }
.steps li { border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; background: #fff; }
.steps p { margin: 0; }
.step-label { display: block; color: var(--blue); font-weight: 700; font-size: .8rem; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 4px; }

/* Frequency */
.freq-grid { display: grid; gap: 14px; margin-top: 24px; }
.freq { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.freq p { margin: 0; }

/* About */
.about-grid { display: grid; gap: 32px; }
.stats { margin: 0; display: grid; gap: 14px; }
.stats div { border-top: 3px solid var(--blue); padding-top: 10px; }
.stats dt { font-size: 2rem; font-weight: 700; color: var(--ink); line-height: 1.1; }
.stats dd { margin: 4px 0 0; }

/* Contact */
.contact { background: var(--bg-alt); }
.contact-grid { display: grid; gap: 32px; }
.contact-form {
  display: grid; gap: 14px; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px;
}
.contact-form label { display: grid; gap: 6px; font-weight: 600; color: var(--ink); font-size: .95rem; }
.contact-form input, .contact-form textarea {
  font: 400 16px/1.4 var(--font); color: var(--ink);
  padding: 12px; border: 1px solid #c3ccd6; border-radius: 8px; width: 100%;
}
.contact-form input:focus, .contact-form textarea:focus { outline: 2px solid var(--blue); outline-offset: 1px; border-color: var(--blue); }
.hp { position: absolute; left: -9999px; }
.form-status { margin: 0; color: var(--blue); font-weight: 600; }

/* Footer */
.site-footer { background: var(--navy); color: #c9d3de; padding: 36px 0; border-top: 3px solid var(--blue); }
.site-footer a { color: #fff; }
.footer-logo { height: 24px; width: auto; margin-bottom: 16px; }
.site-footer .fine { font-size: .85rem; color: #8d9aa8; margin: 0; }

/* Wider screens */
@media (min-width: 600px) {
  .btn-row { flex-direction: row; }
  .brand img { height: 30px; }
}
@media (min-width: 900px) {
  :root { --header-h: 72px; }
  .brand img { height: 34px; }
  .hero { padding: 80px 0 88px; }
  .section { padding: 80px 0; }
  .check-list { grid-template-columns: 1fr 1fr; }
  .service-grid { grid-template-columns: 1fr 1fr; }
  .service-lead { grid-column: 1 / -1; }
  .steps, .freq-grid { grid-template-columns: repeat(3, 1fr); }
  .about-grid { grid-template-columns: 1.4fr 1fr; align-items: start; }
  .contact-grid { grid-template-columns: 1fr 1.1fr; align-items: start; }
}