/* ================================================================
   SysInt Inc — main.css
   Shared layout: reset, nav, footer, buttons, utilities
   Theme variables (:root) are set per-page in <style> blocks
   ================================================================ */

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body { width: 100%; overflow-x: hidden; font-family: 'Montserrat', 'Segoe UI', Arial, sans-serif; line-height: 1.65; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ── CONTAINER ── */
.container {
  width: min(var(--max, 1200px), calc(100% - 48px));
  margin: 0 auto;
}

/* ── HEADER / NAV ── */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px) saturate(160%);
  background: rgba(6,8,20,0.80);
  border-bottom: 1px solid rgba(255,255,255,0.07);
  transition: background 0.3s;
}

header.scrolled {
  background: rgba(6,8,20,0.97);
  border-bottom-color: rgba(255,255,255,0.12);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  gap: 20px;
}

.brand img.logo-side {
  height: 72px;
  width: auto;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--muted, #aeb8d0);
  font-size: 0.92rem;
  font-weight: 500;
}

.nav-links a { transition: color 0.2s; }
.nav-links a:hover { color: #fff; }
.nav-links a.active { color: var(--cyan, #18c8ff); }

.nav-cta {
  padding: 9px 20px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan, #18c8ff), var(--violet, #8d1cff), var(--orange, #ff7a00));
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  box-shadow: 0 6px 22px rgba(141,28,255,0.28);
  transition: opacity 0.2s;
  white-space: nowrap;
}

.nav-cta:hover { opacity: 0.85; }

/* ── HAMBURGER ── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  padding: 14px;
  min-width: 44px;
  min-height: 44px;
  cursor: pointer;
  flex-shrink: 0;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #eef3ff;
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.2s;
}

/* ── MOBILE FULL-SCREEN OVERLAY ── */
.nav-mobile {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.2rem;
  pointer-events: none;
}

.nav-mobile.open {
  display: flex;
  pointer-events: auto;
  background: rgba(6,8,20,0.98);
  backdrop-filter: blur(24px);
}

.nav-mobile a {
  display: block;
  padding: 10px 24px;
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.65);
  transition: color 0.2s;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.nav-mobile a:hover,
.nav-mobile a.active { color: #fff; }

.nav-mobile .mobile-cta {
  margin-top: 0.5rem;
  padding: 14px 36px;
  border-radius: 14px;
  background: linear-gradient(90deg, var(--cyan, #18c8ff), var(--violet, #8d1cff), var(--orange, #ff7a00));
  color: #fff !important;
  font-size: 1rem !important;
  letter-spacing: 0.06em !important;
  box-shadow: 0 8px 28px rgba(141,28,255,0.35);
  touch-action: manipulation;
}

.nav-mobile-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #aeb8d0;
  font-size: 1.2rem;
  cursor: pointer;
  touch-action: manipulation;
  transition: background 0.2s, color 0.2s;
}

.nav-mobile-close:hover { background: rgba(255,255,255,0.15); color: #fff; }

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 14px;
  font-weight: 700;
  font-size: 0.96rem;
  font-family: inherit;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(90deg, var(--cyan, #18c8ff), var(--violet, #8d1cff), var(--orange, #ff7a00));
  color: #fff;
  box-shadow: 0 6px 22px rgba(141,28,255,0.28);
}

.btn-primary:hover { box-shadow: 0 10px 32px rgba(141,28,255,0.40); transform: translateY(-1px); }

.btn-outline {
  border: 1.5px solid rgba(255,255,255,0.22) !important;
  background: transparent;
  color: #fff;
}

.btn-outline:hover { border-color: rgba(255,255,255,0.45) !important; background: rgba(255,255,255,0.06); }

/* ── SECTIONS ── */
section { padding: 56px 0; scroll-margin-top: 100px; }

.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan, #18c8ff);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.4rem, 2.2vw, 1.9rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-sub {
  color: var(--muted, #aeb8d0);
  font-size: 0.97rem;
  margin-bottom: 36px;
  line-height: 1.72;
}

.gradient-text {
  background: linear-gradient(90deg, var(--cyan, #18c8ff) 0%, #5a7dff 40%, var(--violet, #8d1cff) 70%, var(--orange, #ff7a00) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── DIVIDER ── */
.divider {
  height: 1px;
  background: var(--line, rgba(255,255,255,0.10));
  margin: 0;
}

/* ── CONTACT BOX ── */
.contact-box {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.contact-box h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); letter-spacing: -0.03em; margin-bottom: 14px; }
.contact-box p { color: var(--muted, #aeb8d0); font-size: 1.05rem; margin-bottom: 28px; }

.contact-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

/* ── FOOTER ── */
footer {
  padding: 40px 0 56px;
  border-top: 1px solid rgba(255,255,255,0.07);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-brand img.logo-text {
  height: 28px;
  width: auto;
  object-fit: contain;
  opacity: 0.65;
}

.footer-brand:hover img { opacity: 1; }

.footer-nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-nav a { color: var(--muted, #aeb8d0); font-size: 0.9rem; transition: color 0.2s; }
.footer-nav a:hover { color: #fff; }

.footer-copy { color: var(--muted, #aeb8d0); font-size: 0.85rem; }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .container { width: calc(100% - 32px); }
  .brand img.logo-side { height: 54px; }
}