/* ============================================================
   Future Proof Telecom Services — shared stylesheet
   Design intent: civic infrastructure / engineering-firm aesthetic.
   Muted navy + slate + warm signal accent. No lifestyle-SaaS gradients.
   ============================================================ */

:root {
  --navy-950: #0f1b2d;
  --navy-900: #14263f;
  --navy-800: #1c3654;
  --navy-700: #2a4a6f;
  --slate-600: #4b5b6b;
  --slate-500: #6b7a89;
  --slate-300: #b6c0c9;
  --slate-100: #eef1f4;
  --paper: #f7f6f2;
  --white: #ffffff;
  --signal: #c1791f;      /* muted amber/rust — used sparingly for CTAs */
  --signal-dark: #9c611a;
  --line: #d8ddE1;
  --success-line: #3f6b4f;

  --font-head: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --maxw: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--navy-950);
  background: var(--white);
  line-height: 1.6;
  font-size: 16.5px;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--navy-900);
  line-height: 1.22;
  margin: 0 0 0.5em;
  font-weight: 600;
}
h1 { font-size: clamp(2rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; color: var(--navy-800); }
a { color: var(--navy-700); text-decoration: underline; text-decoration-color: var(--slate-300); }
a:hover { color: var(--signal-dark); }
img { max-width: 100%; display: block; }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Skip link (accessibility) ---------- */
.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
}
.skip-link:focus {
  position: fixed;
  left: 16px;
  top: 16px;
  z-index: 999;
  background: var(--white);
  padding: 10px 16px;
  border: 2px solid var(--navy-900);
  border-radius: 4px;
}

/* ---------- Header / nav ---------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--white);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--navy-950);
}
.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 4px;
  background: var(--navy-900);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  flex-shrink: 0;
}
.brand-text {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.05rem;
  line-height: 1.15;
}
.brand-logo {
  height: 40px;
  width: auto;
  display: block;
}
.brand-text small {
  display: block;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--slate-500);
}

nav.primary-nav ul {
  list-style: none;
  display: flex;
  gap: 26px;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}
nav.primary-nav a {
  text-decoration: none;
  color: var(--navy-800);
  font-size: 0.94rem;
  font-weight: 500;
}
nav.primary-nav a[aria-current="page"] {
  color: var(--signal-dark);
  border-bottom: 2px solid var(--signal-dark);
  padding-bottom: 3px;
}
nav.primary-nav a:hover { color: var(--signal-dark); }

.nav-cta {
  display: inline-block;
  background: var(--navy-900);
  color: var(--white) !important;
  text-decoration: none !important;
  padding: 9px 18px;
  border-radius: 4px;
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
}
.nav-cta:hover { background: var(--signal-dark); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 8px 10px;
  font-size: 0.85rem;
  cursor: pointer;
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(180deg, var(--navy-950) 0%, var(--navy-900) 100%);
  color: var(--white);
  padding: 72px 0 64px;
}
.hero .wrap { max-width: var(--maxw); }
.hero-eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  color: var(--slate-300);
  margin-bottom: 14px;
  font-weight: 600;
}
.hero h1 { color: var(--white); max-width: 760px; }
.hero-sub {
  max-width: 640px;
  color: var(--slate-300);
  font-size: 1.08rem;
}
.hero-actions { display: flex; gap: 14px; margin-top: 28px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 4px;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
  border: 1px solid transparent;
}
.btn-primary { background: var(--signal); color: var(--navy-950); }
.btn-primary:hover { background: #d68a2f; color: var(--navy-950); }
.btn-outline {
  border-color: rgba(255,255,255,0.4);
  color: var(--white);
}
.btn-outline:hover { border-color: var(--white); }
.btn-dark { background: var(--navy-900); color: var(--white); }
.btn-dark:hover { background: var(--signal-dark); }

/* ---------- Trust strip ---------- */
.trust-strip {
  background: var(--slate-100);
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}
.trust-strip ul {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--slate-600);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* ---------- Sections ---------- */
section { padding: 64px 0; }
section.alt { background: var(--paper); }
.section-head { max-width: 680px; margin-bottom: 40px; }
.section-head .kicker {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--signal-dark);
  margin-bottom: 10px;
}

/* ---------- Card grid ---------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.grid-6 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 860px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}
@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 860px) {
  .grid-6 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .grid-4, .grid-6 { grid-template-columns: 1fr; }
}

.card {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 28px;
  background: var(--white);
}
.card .card-icon {
  width: 40px;
  height: 40px;
  border-radius: 6px;
  background: var(--navy-950);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.card h3 { margin-bottom: 8px; }
.card p:last-child { margin-bottom: 0; }
.card a.card-link {
  display: inline-block;
  margin-top: 6px;
  font-size: 0.9rem;
  font-weight: 600;
}

/* ---------- Case study teaser / cards ---------- */
.case-card {
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--white);
}
.case-card .case-media {
  height: 180px;
  background: var(--navy-800);
  background-image: linear-gradient(135deg, var(--navy-800), var(--navy-700));
  display: flex;
  align-items: flex-end;
  padding: 14px 18px;
}
.case-card .case-media span {
  color: var(--slate-300);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
}
.case-card .case-body { padding: 22px; }
.stat-row {
  display: flex;
  gap: 22px;
  margin: 16px 0;
  flex-wrap: wrap;
}
.stat {
  min-width: 90px;
}
.stat .stat-num {
  font-family: var(--font-head);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--navy-900);
  display: block;
}
.stat .stat-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--slate-500);
}

/* ---------- Tags/pills ---------- */
.pill {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 4px 10px;
  border-radius: 100px;
  background: var(--slate-100);
  color: var(--navy-800);
  border: 1px solid var(--line);
}

/* ---------- CTA banner ---------- */
.cta-banner {
  background: var(--navy-950);
  color: var(--white);
  padding: 56px 0;
  text-align: center;
}
.cta-banner h2 { color: var(--white); }
.cta-banner p { color: var(--slate-300); max-width: 560px; margin: 0 auto 24px; }

/* ---------- Forms ---------- */
form.contact-form {
  display: grid;
  gap: 18px;
  max-width: 560px;
}
.form-row { display: grid; gap: 6px; }
.form-row label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--navy-800);
}
.form-row input,
.form-row textarea,
.form-row select {
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 11px 12px;
  font-size: 0.95rem;
  font-family: var(--font-body);
  color: var(--navy-950);
}
.form-row input:focus,
.form-row textarea:focus,
.form-row select:focus {
  outline: 2px solid var(--navy-700);
  outline-offset: 1px;
}
.required { color: var(--signal-dark); }

/* ---------- Tables (for stats / comparisons) ---------- */
table.compare {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
table.compare th, table.compare td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
}
table.compare th { background: var(--slate-100); }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--navy-950);
  color: var(--slate-300);
  padding: 48px 0 28px;
  font-size: 0.9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}
@media (max-width: 780px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
.site-footer h4 {
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 8px; }
.site-footer a { color: var(--slate-300); text-decoration: none; }
.site-footer a:hover { color: var(--white); text-decoration: underline; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--slate-500);
}
.footer-credential {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.14);
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 0.78rem;
  color: var(--slate-300);
}

/* ---------- Placeholder marker (visible in dev, remove before launch) ---------- */
.placeholder {
  background: #fff3cd;
  color: #6b4c00;
  border: 1px dashed #c1791f;
  padding: 0 4px;
  border-radius: 2px;
  font-style: italic;
}

/* ---------- Article / Insights post ---------- */
.article-header {
  background: var(--navy-950);
  color: var(--white);
  padding: 40px 0 36px;
}
.article-header .breadcrumb { color: var(--slate-300); margin-bottom: 18px; }
.article-header .breadcrumb a { color: var(--slate-300); }
.article-header h1 { color: var(--white); max-width: 780px; }
.article-header .article-deck { color: var(--slate-300); max-width: 680px; font-size: 1.05rem; margin-top: 12px; }
.article-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 18px;
  font-size: 0.82rem;
  color: var(--slate-300);
}
.prose { max-width: 720px; }
.prose h2 {
  margin-top: 2.2em;
  font-size: 1.35rem;
}
.prose p { font-size: 1rem; }
.article-sources {
  border-top: 1px solid var(--line);
  margin-top: 40px;
  padding-top: 20px;
  font-size: 0.85rem;
  color: var(--slate-500);
}
.article-cta {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 22px 24px;
  background: var(--paper);
  margin-top: 36px;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  font-size: 0.82rem;
  color: var(--slate-500);
  margin-bottom: 18px;
}
.breadcrumb a { color: var(--slate-500); }

/* ---------- Page header (non-home pages) ---------- */
.page-header {
  background: var(--navy-950);
  color: var(--white);
  padding: 44px 0 40px;
}
.page-header h1 { color: var(--white); margin-bottom: 8px; }
.page-header p { color: var(--slate-300); max-width: 680px; margin: 0; }

/* ---------- Mobile nav ---------- */
@media (max-width: 880px) {
  .nav-toggle { display: inline-block; }
  nav.primary-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--line);
    padding: 8px 24px 18px;
  }
  nav.primary-nav.open { display: block; }
  nav.primary-nav ul { flex-direction: column; gap: 14px; }
  .header-actions { display: none; }
  .site-header .wrap { position: relative; }
}

/* ---------- Utility ---------- */
.center { text-align: center; }
.mt-0 { margin-top: 0; }
.small { font-size: 0.85rem; color: var(--slate-500); }