/* =========================================================
   TechNest Solutions LLC — Stylesheet
   Design tokens:
   --ink-navy    #0A1930  (deep background / dark sections)
   --deep-blue   #12294F  (secondary dark surface)
   --signal-blue #2F6FED  (primary accent / buttons)
   --circuit-cyan#00C2B8  (secondary accent, gradient partner)
   --cloud-white #F7F9FC  (page background)
   --slate       #5B6B85  (muted body text)
   Type: Space Grotesk (display), Inter (body/UI), JetBrains Mono (labels)
   ========================================================= */

:root {
  --ink-navy: #0A1930;
  --deep-blue: #12294F;
  --signal-blue: #2F6FED;
  --signal-blue-dark: #1E52C4;
  --circuit-cyan: #00C2B8;
  --cloud-white: #F7F9FC;
  --white: #FFFFFF;
  --slate: #5B6B85;
  --slate-light: #8797B2;
  --border-light: #E3E9F3;

  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body: "Inter", "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --shadow-sm: 0 2px 10px rgba(10, 25, 48, 0.06);
  --shadow-md: 0 12px 32px rgba(10, 25, 48, 0.10);
  --shadow-lg: 0 24px 60px rgba(10, 25, 48, 0.18);

  --header-height: 76px;
  --transition: 0.25s ease;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

body, h1, h2, h3, h4, p, ul, ol, li, figure { margin: 0; padding: 0; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { font: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font: inherit; }

body {
  font-family: var(--font-body);
  color: var(--ink-navy);
  background: var(--cloud-white);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; line-height: 1.15; color: var(--ink-navy); }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--signal-blue);
  color: #fff;
  padding: 12px 18px;
  z-index: 1000;
  border-radius: 0 0 8px 0;
}
.skip-link:focus {
  left: 0;
}

:focus-visible {
  outline: 3px solid var(--circuit-cyan);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--signal-blue), var(--signal-blue-dark));
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-outline {
  border: 1.5px solid var(--border-light);
  color: var(--ink-navy);
  background: rgba(255,255,255,0.6);
}
.btn-outline:hover { border-color: var(--signal-blue); color: var(--signal-blue); transform: translateY(-2px); }
.btn-large { padding: 16px 36px; font-size: 1.05rem; }
.btn-nav { padding: 10px 22px; font-size: 0.88rem; }

/* ---------- Eyebrow / Section heading ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--signal-blue);
  margin-bottom: 10px;
  display: inline-block;
}
.eyebrow-light { color: var(--circuit-cyan); }

.section { padding: 96px 0; }
.section-alt { background: var(--white); border-top: 1px solid var(--border-light); border-bottom: 1px solid var(--border-light); }
.section-dark { background: linear-gradient(160deg, var(--ink-navy), var(--deep-blue)); }

.section-heading { max-width: 680px; margin-bottom: 56px; }
.section-title { font-size: clamp(1.8rem, 3vw, 2.5rem); margin-bottom: 14px; }
.section-title-light { color: #fff; }
.section-lead { color: var(--slate); font-size: 1.05rem; max-width: 620px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background: rgba(247, 249, 252, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: box-shadow var(--transition), border-color var(--transition), background var(--transition);
}
.site-header.is-scrolled {
  background: rgba(247, 249, 252, 0.96);
  border-color: var(--border-light);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark { color: var(--signal-blue); display: inline-flex; }
.logo-text { font-family: var(--font-display); font-weight: 700; font-size: 1.2rem; color: var(--ink-navy); }
.logo-text-light { color: #fff; }
.logo-accent { color: var(--signal-blue); font-weight: 600; }

.main-nav { display: flex; align-items: center; gap: 32px; }
.nav-list { display: flex; gap: 28px; }
.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-navy);
  position: relative;
  padding: 6px 0;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--signal-blue);
  transition: width var(--transition);
}
.nav-link:hover::after, .nav-link.active-link::after { width: 100%; }
.nav-link.active-link { color: var(--signal-blue); }

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
}
.hamburger span {
  display: block;
  height: 2px;
  width: 24px;
  background: var(--ink-navy);
  margin: 0 auto;
  transition: transform var(--transition), opacity var(--transition);
}
.hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 76px 0 100px;
  background: linear-gradient(180deg, #EEF3FC 0%, var(--cloud-white) 65%);
  overflow: hidden;
}
.hero-network {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
  position: relative;
  padding-top: 40px;
}
.hero-title { font-size: clamp(2.1rem, 4.2vw, 3.4rem); margin-bottom: 20px; letter-spacing: -0.01em; }
.hero-subtitle { color: var(--slate); font-size: 1.08rem; max-width: 540px; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 28px; }
.trust-statement {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--slate);
  font-weight: 500;
}
.trust-statement svg { color: var(--signal-blue); flex-shrink: 0; }

.hero-visual { position: relative; display: flex; justify-content: center; }
.hero-image {
  width: 100%;
  max-width: 460px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  aspect-ratio: 1 / 1;
  object-fit: cover;
}
.node-card {
  position: absolute;
  background: #fff;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  padding: 10px 16px;
  font-size: 0.82rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  animation: float 5s ease-in-out infinite;
}
.node-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--circuit-cyan); flex-shrink: 0; }
.node-card--1 { top: 6%; left: -4%; animation-delay: 0s; }
.node-card--2 { bottom: 20%; right: -6%; animation-delay: 1.2s; }
.node-card--3 { bottom: -2%; left: 6%; animation-delay: 2.4s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
  align-items: center;
}
.about-image { position: relative; }
.about-image img { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); }
.about-badge {
  position: absolute;
  bottom: -22px;
  right: -22px;
  background: linear-gradient(135deg, var(--signal-blue), var(--circuit-cyan));
  color: #fff;
  border-radius: var(--radius-md);
  padding: 18px 22px;
  box-shadow: var(--shadow-lg);
  text-align: center;
}
.about-badge strong { display: block; font-family: var(--font-display); font-size: 1.6rem; }
.about-badge span { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; }

.about-points { margin: 24px 0 32px; display: flex; flex-direction: column; gap: 12px; }
.about-points li { display: flex; align-items: flex-start; gap: 10px; color: var(--slate); }
.check-icon {
  flex-shrink: 0;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: rgba(47, 111, 237, 0.12);
  color: var(--signal-blue);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 0.75rem; font-weight: 700;
}

/* ---------- Services ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--cloud-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.service-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(47,111,237,0.12), rgba(0,194,184,0.12));
  color: var(--signal-blue);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.service-card h3 { font-size: 1.08rem; margin-bottom: 10px; }
.service-card p { color: var(--slate); font-size: 0.92rem; }

/* ---------- Why Choose Us ---------- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.why-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-md);
  padding: 26px 22px;
  transition: transform var(--transition), background var(--transition);
}
.why-card:hover { transform: translateY(-4px); background: rgba(255,255,255,0.07); }
.why-icon { font-size: 1.6rem; margin-bottom: 12px; }
.why-card h3 { color: #fff; font-size: 1rem; margin-bottom: 8px; }
.why-card p { color: #A9B7CE; font-size: 0.88rem; }

/* ---------- Process ---------- */
.process-timeline {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  counter-reset: step;
  position: relative;
}
.process-step {
  background: var(--white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px 22px;
  position: relative;
}
.process-index {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--signal-blue);
  display: inline-block;
  margin-bottom: 14px;
}
.process-step h3 { font-size: 1rem; margin-bottom: 8px; }
.process-step p { color: var(--slate); font-size: 0.88rem; }
.process-step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 30px;
  right: -20px;
  width: 20px;
  height: 1px;
  background: var(--border-light);
  display: none;
}
@media (min-width: 900px) {
  .process-step:not(:last-child)::after { display: block; }
}

/* ---------- Industries ---------- */
.industries-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.industry-chip {
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid var(--border-light);
  font-weight: 500;
  font-size: 0.9rem;
  background: var(--cloud-white);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.industry-chip:hover { background: var(--signal-blue); color: #fff; border-color: var(--signal-blue); }

/* ---------- CTA ---------- */
.cta-section {
  background: radial-gradient(circle at 20% 20%, rgba(0,194,184,0.35), transparent 55%),
              linear-gradient(135deg, var(--ink-navy), var(--deep-blue));
  padding: 90px 0;
  text-align: center;
}
.cta-inner h2 { color: #fff; font-size: clamp(1.6rem, 3vw, 2.3rem); max-width: 720px; margin: 0 auto 16px; }
.cta-inner p { color: #B9C6DC; max-width: 560px; margin: 0 auto 32px; font-size: 1.02rem; }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 56px;
}
.contact-list { margin: 28px 0 30px; display: flex; flex-direction: column; gap: 18px; }
.contact-list li { display: flex; gap: 14px; align-items: flex-start; }
.contact-icon { font-size: 1.2rem; }
.contact-list a { color: var(--signal-blue); font-weight: 500; }
.contact-list a:hover { text-decoration: underline; }

.social-links { display: flex; gap: 10px; }
.social-icon {
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border-light);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.78rem; font-weight: 700;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}
.social-icon:hover { background: var(--signal-blue); color: #fff; border-color: var(--signal-blue); transform: translateY(-2px); }

.contact-form-wrapper {
  background: var(--white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 0.86rem; font-weight: 600; }
.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 14px;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: var(--cloud-white);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--signal-blue);
  box-shadow: 0 0 0 3px rgba(47,111,237,0.15);
  outline: none;
}
.form-group.field-invalid input,
.form-group.field-invalid select,
.form-group.field-invalid textarea {
  border-color: #E5484D;
}
.error-message {
  color: #E5484D;
  font-size: 0.8rem;
  min-height: 1em;
}
.form-checkbox { flex-direction: row; align-items: flex-start; gap: 10px; }
.form-checkbox input { width: 18px; height: 18px; margin-top: 3px; flex-shrink: 0; }
.form-checkbox label { font-weight: 500; font-size: 0.85rem; color: var(--slate); }

.btn-submit { width: 100%; position: relative; margin-top: 6px; }
.btn-spinner {
  display: none;
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.5);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
.btn-submit.is-loading .btn-spinner { display: inline-block; }
.btn-submit.is-loading .btn-text { opacity: 0.8; }
.btn-submit:disabled { opacity: 0.75; cursor: not-allowed; }
@keyframes spin { to { transform: rotate(360deg); } }

.form-status {
  margin-top: 14px;
  font-size: 0.9rem;
  font-weight: 500;
  min-height: 1.2em;
}
.form-status.status-success { color: #1A8754; }
.form-status.status-error { color: #E5484D; }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink-navy); color: #C7D2E5; padding-top: 72px; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 56px;
}
.footer-brand p { margin-top: 16px; font-size: 0.9rem; color: #9DACC6; max-width: 320px; }
.footer-col h3 { color: #fff; font-size: 0.95rem; margin-bottom: 18px; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 0.88rem; color: #B7C3DA; transition: color var(--transition); }
.footer-col a:hover { color: var(--circuit-cyan); }
.footer-contact li { font-size: 0.88rem; color: #B7C3DA; }
.social-links-footer { margin-top: 18px; }
.social-links-footer .social-icon { border-color: rgba(255,255,255,0.18); color: #fff; }

.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 22px 0; }
.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 0.85rem;
  color: #93A2BE;
}
.footer-legal { display: flex; gap: 20px; }
.footer-legal a:hover { color: var(--circuit-cyan); }
.disclaimer { font-size: 0.76rem; color: #6E7EA0; line-height: 1.6; padding-top: 4px; }

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 1080px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .process-timeline { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; max-width: 420px; margin: 0 auto 20px; }
  .about-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 780px) {
  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0; right: 0;
    background: var(--white);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 24px 24px;
    box-shadow: var(--shadow-md);
    transform: translateY(-130%);
    opacity: 0;
    transition: transform var(--transition), opacity var(--transition);
  }
  .main-nav.is-open { transform: translateY(0); opacity: 1; }
  .nav-list { flex-direction: column; gap: 4px; margin-bottom: 16px; }
  .nav-link { display: block; padding: 12px 4px; border-bottom: 1px solid var(--border-light); }
  .btn-nav { align-self: flex-start; }
  .hamburger { display: flex; }

  .process-timeline { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; padding-bottom: 40px; }
  .form-row { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
}

@media (max-width: 480px) {
  .hero { padding-bottom: 60px; }
  .node-card { font-size: 0.7rem; padding: 8px 12px; }
  .about-badge { right: 8px; bottom: -18px; padding: 14px 16px; }
  .contact-form-wrapper { padding: 24px; }
}