/* NetSecEng — enterprise network & security consulting
   Palette: white surface + deep navy + steel-blue accent */

:root {
  --bg:           #ffffff;
  --bg-soft:      #f8fafc;
  --surface:      #ffffff;
  --surface-2:    #f1f5f9;
  --border:       #e2e8f0;
  --border-strong:#cbd5e1;
  --text:         #0f172a;
  --text-muted:   #475569;
  --subtle:       #94a3b8;
  --primary:      #0b3d7f;
  --primary-hover:#0a3370;
  --primary-soft: rgba(11, 61, 127, 0.08);
  --accent:       #3b82f6;
  --accent-hover: #2563eb;
  --accent-soft:  rgba(59, 130, 246, 0.1);
  --success:      #10b981;
  --danger:       #dc2626;

  --radius-sm: 6px;
  --radius:    10px;
  --radius-lg: 16px;

  --shadow-xs: 0 1px 2px rgba(15,23,42,0.06);
  --shadow-sm: 0 1px 3px rgba(15,23,42,0.07), 0 1px 2px rgba(15,23,42,0.04);
  --shadow:    0 4px 20px rgba(15,23,42,0.08);
  --shadow-lg: 0 20px 60px rgba(15,23,42,0.12);

  --content-max: 1160px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; transition: color .15s ease; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

h1, h2, h3, h4 {
  color: var(--text);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 .5em;
  line-height: 1.2;
}
h1 { font-size: 2.5rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.2rem; font-weight: 600; }
h4 { font-size: 1rem; font-weight: 600; }

p { margin: 0 0 1em; color: var(--text); }
.muted { color: var(--text-muted); }

hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }

.container {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ====== Header ====== */

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header,
.site-header .container,
.brand { overflow: visible; }

.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 16px; padding-bottom: 16px;
  min-height: 84px;
}
.brand {
  display: inline-flex; align-items: center; gap: 12px;
  color: var(--text); text-decoration: none;
}
.brand:hover { text-decoration: none; }
.brand-shield {
  display: block;
  height: 44px;
  width: auto;
  flex-shrink: 0;
  object-fit: contain;
}
.brand-wordmark {
  display: inline-block;
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.2;
  padding-bottom: 2px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
@media (max-width: 600px) {
  .brand-shield { height: 36px; }
  .brand-wordmark { font-size: 1.2rem; }
}

.main-nav { display: flex; gap: 6px; align-items: center; }
.main-nav a {
  padding: 8px 14px;
  color: var(--text-muted);
  font-size: .95rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: color .15s ease, background-color .15s ease;
}
.main-nav a:hover { color: var(--primary); background: var(--primary-soft); text-decoration: none; }
.main-nav a.active { color: var(--primary); background: var(--primary-soft); }

.btn-cta {
  background: var(--primary) !important;
  color: #fff !important;
  padding: 9px 18px !important;
}
.btn-cta:hover { background: var(--primary-hover) !important; text-decoration: none; }

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 8px 10px;
  cursor: pointer;
}
.menu-toggle span {
  display: block; width: 20px; height: 2px;
  background: var(--text); margin: 4px 0;
}

@media (max-width: 860px) {
  .menu-toggle { display: inline-block; }
  .main-nav {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    padding: 8px;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 14px; }
}

/* ====== Main ====== */

main { flex: 1 0 auto; }

/* ====== Hero ====== */

.hero {
  position: relative;
  padding: 80px 0 72px;
  background:
    radial-gradient(ellipse 90% 70% at 80% -10%, rgba(59,130,246,0.12), transparent 60%),
    radial-gradient(ellipse 60% 60% at 10% 110%, rgba(11,61,127,0.10), transparent 70%),
    linear-gradient(180deg, #fafbfc, #fff);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(11,61,127,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11,61,127,0.035) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at 50% 0%, rgba(0,0,0,.8), transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, rgba(0,0,0,.8), transparent 70%);
  pointer-events: none;
}
.hero .container { position: relative; }
.hero .eyebrow {
  display: inline-block;
  font-size: .8rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent-hover);
  background: var(--accent-soft);
  border: 1px solid rgba(59,130,246,0.25);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(2.1rem, 4.5vw, 3.2rem);
  max-width: 780px;
}
.hero h1 .accent {
  background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p.lead {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 640px;
  margin-top: 12px;
}
.hero-ctas {
  margin-top: 28px;
  display: flex; flex-wrap: wrap; gap: 12px;
}

/* ====== Buttons ====== */

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
  transition: background-color .15s ease, color .15s ease, border-color .15s ease, transform .1s ease;
  text-decoration: none;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); color: #fff; text-decoration: none; }
.btn-primary:active { transform: translateY(1px); }
.btn-primary:disabled { opacity: .6; cursor: not-allowed; }

.btn-ghost {
  background: #fff;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); text-decoration: none; }

/* ====== Section layout ====== */

.section { padding: 72px 0; }
.section-alt { background: var(--bg-soft); }
.section-title { text-align: center; margin-bottom: 44px; }
.section-title h2 { margin-bottom: 8px; }
.section-title p { color: var(--text-muted); margin: 0; max-width: 620px; margin-left: auto; margin-right: auto; }

/* ====== Service tiles ====== */

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
@media (max-width: 820px) { .grid-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: box-shadow .2s ease, border-color .2s ease, transform .2s ease;
}
.card:hover { box-shadow: var(--shadow); border-color: var(--border-strong); }

.service-card .icon {
  width: 44px; height: 44px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--primary-soft);
  color: var(--primary);
  border-radius: 8px;
  margin-bottom: 18px;
}
.service-card .icon svg { width: 24px; height: 24px; }
.service-card h3 { margin: 0 0 8px; color: var(--text); }
.service-card p { color: var(--text-muted); margin: 0; font-size: .95rem; }

.service-card ul {
  margin: 12px 0 0;
  padding-left: 20px;
  font-size: .9rem;
  color: var(--text-muted);
}
.service-card li { margin-bottom: 4px; }

/* ====== Stats strip ====== */

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 24px;
  text-align: center;
}
.stat-num {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  letter-spacing: -0.02em;
}
.stat-label {
  font-size: .9rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ====== CTA band ====== */

.cta-band {
  background: linear-gradient(135deg, var(--primary) 0%, #0e2a5e 100%);
  color: #fff;
  padding: 56px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}
.cta-band .container { position: relative; }
.cta-band h2 { color: #fff; }
.cta-band p { color: rgba(255,255,255,0.85); max-width: 640px; margin: 0 auto 28px; }
.cta-band .btn-primary {
  background: #fff; color: var(--primary);
}
.cta-band .btn-primary:hover { background: #f1f5f9; color: var(--primary); }

/* ====== Prose / About ====== */

.prose {
  max-width: 780px;
  margin: 0 auto;
}
.prose h2 { margin-top: 1.5em; }
.prose h2:first-child { margin-top: 0; }
.prose p { color: var(--text); }

/* ====== Forms ====== */

.form-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
}
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: .9rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.form-group label.error { color: var(--danger); }

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="search"],
.form-group textarea {
  width: 100%;
  background: #fff;
  border: 1px solid var(--border-strong);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-family: inherit;
  font-size: 1rem;
  line-height: 1.4;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.form-group textarea { min-height: 150px; resize: vertical; }

.field-error {
  color: var(--danger);
  font-size: .85rem;
  margin-top: 4px;
  min-height: 1em;
}
.char-count {
  text-align: right;
  font-size: .8rem;
  color: var(--subtle);
  margin-top: 4px;
}

.form-error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-size: .9rem;
}
.form-notice {
  background: var(--accent-soft);
  border: 1px solid rgba(59,130,246,0.25);
  color: var(--text-muted);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-size: .9rem;
}

.captcha-group {
  background: var(--primary-soft);
  border: 1px solid rgba(11,61,127,0.2);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
}
.captcha-group label { color: var(--text-muted); }
.captcha-group label strong {
  color: var(--primary);
  font-family: 'Georgia', serif;
  font-size: 1.1em;
  letter-spacing: .04em;
}
.captcha-group input { max-width: 160px; }

.honeypot {
  position: absolute; left: -10000px; top: auto;
  width: 1px; height: 1px; overflow: hidden;
}

/* ====== Message cards (thankyou / 404) ====== */

.message-card {
  max-width: 560px;
  margin: 80px auto;
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
}
.message-card .big {
  font-size: 5rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 16px;
  letter-spacing: -.03em;
}

/* ====== Footer ====== */

.site-footer {
  margin-top: 0;
  background: #0b1a2e;
  color: rgba(255,255,255,0.75);
  padding: 48px 0 28px;
}
.site-footer .footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}
@media (max-width: 720px) { .site-footer .footer-grid { grid-template-columns: 1fr; gap: 28px; } }

.site-footer h4 {
  color: #fff;
  font-size: .9rem;
  letter-spacing: .05em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.site-footer a { color: rgba(255,255,255,0.75); }
.site-footer a:hover { color: #fff; text-decoration: none; }
.site-footer .footer-links a { display: block; padding: 4px 0; font-size: .9rem; }
.site-footer .footer-brand p { color: rgba(255,255,255,0.65); font-size: .9rem; margin: 12px 0 0; }
.site-footer .footer-wordmark {
  display: inline-block;
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.2;
  padding-bottom: 2px;
  color: #fff;
  background: linear-gradient(90deg, #fff 0%, #90b4ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.site-footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: .85rem;
  color: rgba(255,255,255,0.5);
}

/* ====== Misc ====== */

::selection { background: var(--accent-soft); }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

@media (max-width: 600px) {
  .hero { padding: 56px 0 48px; }
  .section { padding: 48px 0; }
  .form-card { padding: 24px; }
  .message-card { padding: 32px 24px; margin: 40px auto; }
  h1 { font-size: 1.9rem; }
}