/* ============================================================
   Network Paradigms — Global Styles
   Modern · Professional · Network Systems Technology
   ============================================================ */

:root {
  --bg-dark: #050a14;
  --bg-card: #0b1220;
  --bg-elevated: #111a2e;
  --primary: #0078d7;
  --primary-light: #00a4ff;
  --accent: #00c6ff;
  --text: #ffffff;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(0, 164, 255, 0.25);
  --success: #10b981;
  --radius: 6px;
  --radius-lg: 12px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --transition: 0.25s ease;
  --font: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg-dark);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); }
h3 { font-size: 1.25rem; }
p { color: var(--text-muted); }

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5rem 0;
}

.section-dark {
  background: var(--bg-card);
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(5, 10, 20, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
}

.logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  display: block;
}

.logo-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.logo-text span {
  color: var(--text-muted);
  font-weight: 400;
  font-size: 0.85em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: var(--radius);
  transition: all var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  box-shadow: 0 4px 16px rgba(0, 120, 215, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0, 120, 215, 0.5);
}

.btn-outline {
  border: 1px solid var(--border-strong);
  color: var(--text);
  background: rgba(0, 120, 215, 0.08);
}

.btn-outline:hover {
  background: rgba(0, 120, 215, 0.2);
  border-color: var(--accent);
}

.btn-lg {
  padding: 0.95rem 1.9rem;
  font-size: 0.95rem;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: var(--transition);
}

/* ---------- Hero ---------- */
.hero {
  padding: 9rem 0 5rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60%;
  height: 80%;
  background: radial-gradient(ellipse, rgba(0, 120, 215, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content h1 {
  margin-bottom: 1.25rem;
}

.hero-content h1 .highlight {
  background: linear-gradient(90deg, var(--accent), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.125rem;
  max-width: 520px;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-stats {
  display: flex;
  gap: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.stat-item strong {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
}

.stat-item span {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero-visual {
  position: relative;
}

.hero-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow);
}

.hero-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.hero-card-header .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
}

.status-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.status-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.9rem;
}

.status-item .label {
  color: var(--text-muted);
}

.status-item .value {
  font-weight: 600;
  color: var(--success);
}

/* ---------- Cards / Grids ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.service-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all var(--transition);
  height: 100%;
}

.service-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 80, 160, 0.2);
}

.service-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: rgba(0, 120, 215, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--accent);
  font-size: 1.4rem;
}

.service-card h3 {
  margin-bottom: 0.6rem;
}

.service-card p {
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
}

.service-card .link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.service-card .link:hover {
  gap: 0.55rem;
}

/* ---------- Feature / Why Us ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 2.5rem;
}

.feature-item {
  display: flex;
  gap: 1.1rem;
}

.feature-num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: rgba(0, 120, 215, 0.15);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-item h4 {
  margin-bottom: 0.35rem;
}

.feature-item p {
  font-size: 0.925rem;
}

/* ---------- Industries ---------- */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  margin-top: 2.5rem;
}

.industry-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.25rem;
  text-align: center;
  transition: all var(--transition);
}

.industry-card:hover {
  border-color: var(--border-strong);
  background: rgba(0, 120, 215, 0.08);
}

.industry-card .icon {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
  color: var(--accent);
}

.industry-card h4 {
  font-size: 1rem;
}

/* ---------- CTA Banner ---------- */
.cta-banner {
  background: linear-gradient(135deg, rgba(0, 80, 160, 0.35), rgba(0, 40, 90, 0.5));
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner h2 {
  margin-bottom: 0.75rem;
}

.cta-banner p {
  max-width: 520px;
  margin: 0 auto 1.75rem;
}

/* ---------- Testimonials ---------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.testimonial {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
}

.testimonial .quote {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  font-style: italic;
}

.testimonial .author {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.author-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}

.author strong {
  display: block;
  font-size: 0.95rem;
}

.author span {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ---------- Page Header (inner pages) ---------- */
.page-header {
  padding: 8.5rem 0 3.5rem;
  background: linear-gradient(180deg, rgba(0, 60, 120, 0.2) 0%, transparent 100%);
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  margin-bottom: 0.75rem;
}

.page-header p {
  font-size: 1.15rem;
  max-width: 600px;
}

/* ---------- Contact Form ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 3rem;
  margin-top: 2.5rem;
}

.contact-info h3 {
  margin-bottom: 1rem;
}

.contact-info p {
  margin-bottom: 1.5rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.contact-item {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
}

.contact-item .icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: rgba(0, 120, 215, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}

.contact-item strong {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.15rem;
}

.contact-item span {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.form-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  color: var(--text-muted);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-light);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 4rem 0 2rem;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  font-size: 0.9rem;
  margin-top: 1rem;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 1.1rem;
}

.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.55rem;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--accent);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ---------- Service Detail blocks (services page) ---------- */
.service-detail {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1.5rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--border);
}

.service-detail:last-child {
  border-bottom: none;
}

.service-detail .num {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary);
  opacity: 0.7;
}

.service-detail h3 {
  margin-bottom: 0.5rem;
}

.service-detail ul {
  margin-top: 0.85rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem 1.5rem;
}

.service-detail li {
  font-size: 0.9rem;
  color: var(--text-muted);
  position: relative;
  padding-left: 1.1rem;
}

.service-detail li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.75rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero-grid,
  .contact-grid,
  .about-mission-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-card);
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    gap: 1.25rem;
  }
}

@media (max-width: 600px) {
  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    flex-wrap: wrap;
    gap: 1.5rem;
  }

  .service-detail {
    grid-template-columns: 1fr;
  }

  .service-detail ul {
    grid-template-columns: 1fr;
  }
}