/* ==========================================================================
   Tech Unity — Design system
   ========================================================================== */

:root {
  /* Brand palette (extracted from the Tech Unity logo) */
  --tu-blue-900: #0A1554;
  --tu-blue-700: #14229C;
  --tu-blue-600: #1730D6;
  --tu-blue-500: #2B44E8;
  --tu-cyan-500: #0FD3E8;
  --tu-cyan-400: #4FE3F2;
  --tu-cyan-200: #B8F6FC;

  --tu-ink: #0B0F19;
  --tu-body: #3D4356;
  --tu-muted: #6B7280;
  --tu-line: #E4E8F1;
  --tu-surface: #FFFFFF;
  --tu-surface-alt: #F5F7FC;
  --tu-surface-tint: #EEF1FC;

  --tu-gradient: linear-gradient(120deg, var(--tu-blue-600) 0%, var(--tu-blue-500) 45%, var(--tu-cyan-500) 100%);
  --tu-gradient-dark: linear-gradient(135deg, var(--tu-blue-900) 0%, var(--tu-blue-700) 55%, var(--tu-blue-600) 100%);
  --tu-gradient-text: linear-gradient(100deg, var(--tu-blue-600), var(--tu-cyan-500));

  --tu-shadow-sm: 0 2px 10px rgba(10, 21, 84, 0.06);
  --tu-shadow-md: 0 10px 30px rgba(10, 21, 84, 0.10);
  --tu-shadow-lg: 0 24px 60px rgba(10, 21, 84, 0.16);

  --tu-radius-sm: 10px;
  --tu-radius-md: 16px;
  --tu-radius-lg: 28px;

  --tu-font-head: "Space Grotesk", "Segoe UI", sans-serif;
  --tu-font-body: "Inter", "Segoe UI", sans-serif;

  --tu-container: 1180px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--tu-font-body);
  color: var(--tu-body);
  background: var(--tu-surface);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 {
  font-family: var(--tu-font-head);
  color: var(--tu-ink);
  line-height: 1.15;
  margin: 0 0 .5em;
  letter-spacing: -0.01em;
}
p { margin: 0 0 1em; }
button { font-family: inherit; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--tu-container);
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 96px 0; }
.section-tight { padding: 64px 0; }
.section-alt { background: var(--tu-surface-alt); }
.section-dark {
  background: var(--tu-gradient-dark);
  color: rgba(255,255,255,.86);
  position: relative;
  overflow: hidden;
}
.section-dark h1, .section-dark h2, .section-dark h3 { color: #fff; }

.grid { display: grid; gap: 32px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 980px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--tu-font-head);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--tu-blue-600);
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 2px;
  background: var(--tu-gradient);
  border-radius: 2px;
}
.section-dark .eyebrow { color: var(--tu-cyan-400); }

.section-head { max-width: 680px; margin-bottom: 48px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

.text-gradient {
  background: var(--tu-gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  font-family: var(--tu-font-head);
  font-weight: 600;
  font-size: .95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--tu-gradient);
  color: #fff;
  box-shadow: var(--tu-shadow-md);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--tu-shadow-lg); }
.btn-ghost {
  background: transparent;
  border-color: rgba(11,15,25,.14);
  color: var(--tu-ink);
}
.btn-ghost:hover { border-color: var(--tu-blue-600); color: var(--tu-blue-600); }
.section-dark .btn-ghost { border-color: rgba(255,255,255,.3); color: #fff; }
.section-dark .btn-ghost:hover { border-color: var(--tu-cyan-400); color: var(--tu-cyan-400); }
.btn-sm { padding: 10px 18px; font-size: .85rem; }
.btn svg { width: 16px; height: 16px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--tu-line);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 128px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { height: 88px; width: auto; }
.brand-mark { display: flex; }

.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a {
  padding: 10px 14px;
  border-radius: 999px;
  font-weight: 600;
  font-size: .92rem;
  color: var(--tu-body);
  transition: background .2s ease, color .2s ease;
}
.main-nav a:hover, .main-nav a[aria-current="page"] {
  background: var(--tu-surface-tint);
  color: var(--tu-blue-600);
}

.header-actions { display: flex; align-items: center; gap: 10px; }
.lang-switch {
  display: flex; align-items: center; gap: 2px;
  border: 1px solid var(--tu-line);
  border-radius: 999px;
  padding: 3px;
  background: var(--tu-surface);
}
.lang-switch button {
  border: none; background: transparent; cursor: pointer;
  padding: 6px 12px; border-radius: 999px;
  font-family: var(--tu-font-head); font-weight: 700; font-size: .78rem;
  color: var(--tu-muted); letter-spacing: .04em;
  transition: background .2s ease, color .2s ease;
}
.lang-switch button.active { background: var(--tu-gradient); color: #fff; }

.nav-toggle {
  display: none;
  border: 1px solid var(--tu-line);
  background: var(--tu-surface);
  border-radius: 10px;
  width: 42px; height: 42px;
  align-items: center; justify-content: center;
  cursor: pointer;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; display: block; width: 18px; height: 2px; background: var(--tu-ink);
  position: relative; transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }

@media (max-width: 980px) {
  .main-nav {
    display: none;
    position: fixed; inset: 128px 0 auto 0;
    background: #fff; border-bottom: 1px solid var(--tu-line);
    flex-direction: column; align-items: stretch;
    padding: 12px; gap: 2px;
    box-shadow: var(--tu-shadow-md);
  }
  .main-nav a { padding: 14px 16px; }
  body.nav-open .main-nav { display: flex; }
  .nav-toggle { display: inline-flex; }
  .header-actions .btn-primary.hide-mobile { display: none; }
}
@media (min-width: 981px) {
  .nav-toggle { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 96px 0 72px;
  overflow: hidden;
}
.hero .container {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 56px;
  align-items: center;
}
.hero h1 { font-size: clamp(2.2rem, 4.2vw, 3.4rem); }
.hero-lead { font-size: 1.12rem; color: var(--tu-muted); max-width: 52ch; }
.hero-actions { display: flex; gap: 14px; margin-top: 32px; flex-wrap: wrap; }
.hero-art { position: relative; }
.hero-art svg { width: 100%; height: auto; }
.hero-stats {
  display: flex; gap: 28px; margin-top: 48px; flex-wrap: wrap;
}
.hero-stats .stat b {
  display: block; font-family: var(--tu-font-head); font-size: 1.6rem; color: var(--tu-ink);
}
.hero-stats .stat span { font-size: .82rem; color: var(--tu-muted); }

.blob-bg {
  position: absolute; inset: -20% -10% auto auto; width: 60%; aspect-ratio: 1;
  background: radial-gradient(circle at 30% 30%, rgba(15,211,232,.16), transparent 60%),
              radial-gradient(circle at 70% 70%, rgba(23,48,214,.14), transparent 60%);
  filter: blur(10px);
  z-index: -1;
  pointer-events: none;
}

@media (max-width: 980px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-art { order: -1; max-width: 420px; margin: 0 auto; }
}

/* ---------- Cards ---------- */
.card {
  background: var(--tu-surface);
  border: 1px solid var(--tu-line);
  border-radius: var(--tu-radius-md);
  padding: 32px;
  box-shadow: var(--tu-shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--tu-shadow-md); border-color: transparent; }
.card-icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: var(--tu-gradient);
  margin-bottom: 20px;
}
.card-icon svg { width: 26px; height: 26px; stroke: #fff; }
.card h3 { font-size: 1.15rem; }
.card p { color: var(--tu-muted); margin-bottom: 0; font-size: .95rem; }

.pill {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--tu-surface-tint); color: var(--tu-blue-600);
  border-radius: 999px; padding: 6px 14px; font-size: .78rem; font-weight: 700;
  font-family: var(--tu-font-head);
}
.section-dark .pill { background: rgba(255,255,255,.1); color: var(--tu-cyan-400); }

/* ---------- Logos strip ---------- */
.logo-strip {
  display: flex; flex-wrap: wrap; gap: 36px; align-items: center; justify-content: space-between;
  opacity: .85;
}
.logo-strip .tag {
  font-family: var(--tu-font-head); font-weight: 700; letter-spacing: .06em; font-size: .82rem;
  color: var(--tu-muted); border: 1px dashed var(--tu-line); border-radius: 10px; padding: 10px 16px;
}

/* ---------- Timeline (case study) ---------- */
.timeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 40px; }
.timeline-item { position: relative; padding-top: 28px; }
.timeline-item::before {
  content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 4px;
  background: var(--tu-line); border-radius: 4px;
}
.timeline-item::after {
  content: ""; position: absolute; top: -5px; left: 0; width: 14px; height: 14px; border-radius: 50%;
  background: var(--tu-gradient); box-shadow: 0 0 0 4px rgba(15,211,232,.18);
}
.timeline-item b { display: block; font-family: var(--tu-font-head); color: var(--tu-blue-600); font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; }
.timeline-item h4 { margin: 6px 0 4px; font-size: 1rem; }
.timeline-item p { font-size: .88rem; color: var(--tu-muted); margin: 0; }
@media (max-width: 780px) { .timeline { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .timeline { grid-template-columns: 1fr; } }

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 36px; }
.stat-box {
  background: var(--tu-surface); border: 1px solid var(--tu-line); border-radius: var(--tu-radius-md);
  padding: 24px; text-align: center;
}
.stat-box b { display: block; font-family: var(--tu-font-head); font-size: 2rem; background: var(--tu-gradient-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-box span { font-size: .82rem; color: var(--tu-muted); }
@media (max-width: 780px) { .stat-grid { grid-template-columns: 1fr 1fr; } }

/* ---------- Process steps ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; margin-top: 40px; }
.step { position: relative; padding-left: 4px; }
.step::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  font-family: var(--tu-font-head); font-size: 2.1rem; font-weight: 700;
  background: var(--tu-gradient-text); -webkit-background-clip: text; background-clip: text; color: transparent;
  display: block; margin-bottom: 10px;
}
.step h4 { font-size: 1.02rem; margin-bottom: 6px; }
.step p { font-size: .88rem; color: var(--tu-muted); margin: 0; }
@media (max-width: 780px) { .steps { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .steps { grid-template-columns: 1fr; } }

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--tu-gradient-dark);
  border-radius: var(--tu-radius-lg);
  padding: 56px;
  color: #fff;
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  position: relative; overflow: hidden;
}
.cta-band h2 { color: #fff; margin-bottom: 6px; }
.cta-band p { color: rgba(255,255,255,.75); margin: 0; }

/* ---------- Founder / about ---------- */
.founder-card {
  display: flex; gap: 28px; align-items: flex-start;
  background: var(--tu-surface); border: 1px solid var(--tu-line); border-radius: var(--tu-radius-lg);
  padding: 36px; box-shadow: var(--tu-shadow-sm);
}
.founder-photo {
  width: 148px; height: 148px; border-radius: 24px; overflow: hidden; flex-shrink: 0;
  background: var(--tu-gradient); padding: 4px;
}
.founder-photo img { width: 100%; height: 100%; object-fit: cover; border-radius: 20px; }
.founder-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
@media (max-width: 640px) { .founder-card { flex-direction: column; align-items: center; text-align: center; } }

.badge-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.badge {
  font-size: .78rem; font-weight: 600; color: var(--tu-blue-700);
  background: var(--tu-surface-tint); border-radius: 8px; padding: 8px 12px;
}

/* ---------- Certification badges ---------- */
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 28px; }
.cert-card {
  background: var(--tu-surface); border: 1px solid var(--tu-line); border-radius: var(--tu-radius-md);
  padding: 20px 16px; text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  transition: transform .25s ease, box-shadow .25s ease;
}
.cert-card:hover { transform: translateY(-3px); box-shadow: var(--tu-shadow-md); }
.cert-card img { width: 68px; height: 68px; object-fit: contain; }
.cert-card .cert-title { font-size: .82rem; font-weight: 700; color: var(--tu-ink); line-height: 1.3; }
.cert-card .cert-year { font-size: .74rem; color: var(--tu-muted); }
@media (max-width: 900px) { .cert-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px) { .cert-grid { grid-template-columns: repeat(2, 1fr); } }

.cert-list { display: flex; flex-direction: column; gap: 0; margin-top: 20px; border-top: 1px solid var(--tu-line); }
.cert-list-item {
  display: flex; justify-content: space-between; align-items: baseline; gap: 16px;
  padding: 14px 4px; border-bottom: 1px solid var(--tu-line);
}
.cert-list-item .name { font-size: .92rem; font-weight: 600; color: var(--tu-ink); }
.cert-list-item .org { font-size: .82rem; color: var(--tu-muted); }
.cert-list-item .year { font-size: .8rem; color: var(--tu-muted); white-space: nowrap; }

.value-item { display: flex; gap: 16px; align-items: flex-start; }
.value-item .num {
  font-family: var(--tu-font-head); font-weight: 700; font-size: 1.4rem; color: var(--tu-cyan-500);
  width: 42px; flex-shrink: 0;
}

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: start; }
.contact-info-list { display: flex; flex-direction: column; gap: 18px; margin-top: 28px; }
.contact-info-item { display: flex; gap: 14px; align-items: flex-start; }
.contact-info-item .ico {
  width: 42px; height: 42px; border-radius: 12px; background: var(--tu-surface-tint);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.contact-info-item .ico svg { width: 20px; height: 20px; stroke: var(--tu-blue-600); }
.contact-info-item strong { display: block; font-size: .95rem; color: var(--tu-ink); }
.contact-info-item span, .contact-info-item a { font-size: .9rem; color: var(--tu-muted); }

.form-card {
  background: var(--tu-surface-alt); border: 1px solid var(--tu-line); border-radius: var(--tu-radius-lg);
  padding: 36px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: .82rem; font-weight: 600; color: var(--tu-ink); }
.field input, .field select, .field textarea {
  border: 1px solid var(--tu-line); border-radius: 10px; padding: 12px 14px;
  font-family: inherit; font-size: .92rem; background: #fff; color: var(--tu-ink);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--tu-blue-500); box-shadow: 0 0 0 3px rgba(43,68,232,.14);
}
.form-note { font-size: .78rem; color: var(--tu-muted); margin-top: 14px; }
.form-status { font-size: .88rem; margin-top: 14px; display: none; }
.form-status.show { display: block; }

.map-frame {
  border: 1px solid var(--tu-line); border-radius: var(--tu-radius-md); overflow: hidden;
  height: 260px; margin-top: 24px;
}
.map-frame iframe { width: 100%; height: 100%; border: 0; filter: grayscale(.15); }

@media (max-width: 900px) {
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}

/* ---------- Footer ---------- */
.site-footer { background: var(--tu-blue-900); color: rgba(255,255,255,.7); padding: 64px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand img { height: 30px; margin-bottom: 14px; }
.footer-brand p { font-size: .88rem; color: rgba(255,255,255,.55); max-width: 30ch; }
.site-footer h5 {
  color: #fff; font-family: var(--tu-font-head); font-size: .85rem; letter-spacing: .06em;
  text-transform: uppercase; margin-bottom: 16px;
}
.site-footer ul { display: flex; flex-direction: column; gap: 10px; }
.site-footer a { font-size: .9rem; color: rgba(255,255,255,.65); transition: color .2s ease; }
.site-footer a:hover { color: var(--tu-cyan-400); }
.footer-bottom {
  margin-top: 48px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.12);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: .82rem;
  color: rgba(255,255,255,.5);
}
.social-row { display: flex; gap: 10px; margin-top: 6px; }
.social-row a {
  width: 36px; height: 36px; border-radius: 10px; background: rgba(255,255,255,.08);
  display: flex; align-items: center; justify-content: center;
}
.social-row a svg { width: 17px; height: 17px; stroke: #fff; }
.social-row a:hover { background: var(--tu-gradient); }

@media (max-width: 780px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ---------- Page hero (secondary pages) ---------- */
.page-hero { padding: 64px 0 56px; }
.page-hero h1 { font-size: clamp(2rem, 3.6vw, 2.8rem); max-width: 18ch; }
.breadcrumb { font-size: .85rem; color: rgba(255,255,255,.55); margin-bottom: 18px; }
.breadcrumb a { color: rgba(255,255,255,.8); }
.breadcrumb a:hover { color: var(--tu-cyan-400); }

/* ---------- Reveal animation ---------- */
[data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- Misc ---------- */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
@media (max-width: 900px) { .two-col { grid-template-columns: 1fr; gap: 32px; } }

.list-check { display: flex; flex-direction: column; gap: 14px; margin-top: 24px; }
.list-check li { display: flex; gap: 12px; align-items: flex-start; font-size: .95rem; }
.list-check svg { width: 20px; height: 20px; flex-shrink: 0; stroke: var(--tu-cyan-500); margin-top: 2px; }

.divider { height: 1px; background: var(--tu-line); margin: 64px 0; }

.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--tu-blue-600); color: #fff;
  padding: 10px 16px; border-radius: 0 0 10px 0; z-index: 1000;
}
.skip-link:focus { left: 0; }