/* =========================================================
   BASE.CSS — Shared styles for Nexus Telecom
   Import this on every page.
   ========================================================= */

/* ── Google Fonts ──────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Sora:wght@300;400;500;600;700;800&family=DM+Sans:ital,wght@0,300;0,400;0,500;0,600;1,400&display=swap');

/* ── Design Tokens ─────────────────────────────────────── */
:root {
  /* Primary palette */
  --blue:        #1b8ffe;
  --blue-dark:   #006ace;
  --blue-light:  #6ab7ff;
  --coral:       #FF5C47;
  --coral-dark:  #E04733;
  --coral-light: #FFE9E6;
  --navy:        #000000;
  --navy-mid:    #1A3048;
  --slate:       #4A6380;
  --mist:        #8FA8BF;
  --cloud:       #F0F5FA;
  --white:       #FFFFFF;
  --bg-secondary: #FAFBFC;

  /* Semantic */
  --text-primary:   var(--navy);
  --text-secondary: var(--slate);
  --text-muted:     var(--mist);
  --bg-page:        #F7FAFB;
  --bg-card:        var(--white);
  --border:         #D8E6EF;
  --border-focus:   var(--blue);

  /* Typography */
  --font-display: 'Sora', sans-serif;
  --font-body:    'DM Sans', sans-serif;

  /* Spacing scale */
  --sp-xs:   4px;
  --sp-sm:   8px;
  --sp-md:   16px;
  --sp-lg:   24px;
  --sp-xl:   40px;
  --sp-2xl:  64px;
  --sp-3xl:  96px;

  /* Radii */
  --r-sm:  6px;
  --r-md:  12px;
  --r-lg:  20px;
  --r-xl:  32px;
  --r-pill: 999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(13,27,42,.07), 0 1px 2px rgba(13,27,42,.05);
  --shadow-md:  0 4px 16px rgba(13,27,42,.09), 0 2px 6px rgba(13,27,42,.06);
  --shadow-lg:  0 12px 40px rgba(13,27,42,.12), 0 4px 12px rgba(13,27,42,.07);
  --shadow-card: 0 2px 8px rgba(13,27,42,.06);

  /* Transitions */
  --ease: cubic-bezier(.25,.8,.25,1);
  --dur:  220ms;

  /* Layout */
  --container-max: 1180px;
  --navbar-h:      68px;
}

/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-primary);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ── Typography helpers ─────────────────────────────────── */
.display-font { font-family: var(--font-display); }

h1,h2,h3,h4,h5,h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

/* ── Container ──────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--sp-lg);
}

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-sm);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--r-pill);
  padding: 13px 28px;
  transition: background var(--dur) var(--ease),
              color var(--dur) var(--ease),
              transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--blue);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(0,194,168,.28);
}
.btn-primary:hover {
  background: var(--blue-dark);
  box-shadow: 0 6px 24px rgba(0,194,168,.38);
}

.btn-coral {
  background: var(--coral);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(255,92,71,.28);
}
.btn-coral:hover {
  background: var(--coral-dark);
  box-shadow: 0 6px 24px rgba(255,92,71,.38);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--blue);
  color: var(--blue);
  background: var(--blue-light);
}

.btn-ghost {
  background: rgba(255,255,255,.14);
  color: var(--white);
  border: 1px solid rgba(255,255,255,.22);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover {
  background: rgba(255,255,255,.22);
}

.btn-lg { padding: 16px 36px; font-size: 1.05rem; }
.btn-sm { padding: 9px 18px; font-size: 0.85rem; }

/* ── Badges / Tags ──────────────────────────────────────── */
.tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 5px 13px;
  border-radius: var(--r-pill);
}
.tag-teal  { background: var(--blue-light); color: var(--blue-dark); }
.tag-coral { background: var(--coral-light); color: var(--coral-dark); }
.tag-navy  { background: var(--navy); color: var(--white); }

/* ── Section helpers ────────────────────────────────────── */
.section { padding: var(--sp-3xl) 0; }
.section-sm { padding: var(--sp-2xl) 0; }

.section-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: var(--sp-md);
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  color: var(--navy);
  margin-bottom: var(--sp-md);
}

.section-body {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 580px;
}

.section-header { margin-bottom: var(--sp-2xl); }
.section-header.centered { text-align: center; }
.section-header.centered .section-body { margin: 0 auto; }

/* ── Divider ────────────────────────────────────────────── */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: var(--sp-2xl) 0;
}

/* ── Utility ────────────────────────────────────────────── */
.text-center { text-align: center; }
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.text-teal   { color: var(--blue); }
.text-coral  { color: var(--coral); }
.text-muted  { color: var(--text-muted); }
.fw-800 { font-weight: 800; }

/* ── Navbar ─────────────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 900;
  height: auto;
  background: rgba(0,0,0,.95);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid rgba(255,255,255,.1);
  transition: box-shadow var(--dur) var(--ease);
}
.navbar.is-scrolled {
  box-shadow: var(--shadow-md);
}
.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 16px 0;
}

/* Logo */
.navbar__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--white);
  transition: color var(--dur) var(--ease);
}
.navbar__logo:hover { color: var(--blue-light); }
.navbar__logo-mark {
  width: 36px; height: 36px;
  background: var(--blue);
  border-radius: var(--r-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--white);
  font-size: 1rem;
  flex-shrink: 0;
}

.navbar__logo-img {
  height: 60px;  /* Adjust as needed */
  width: auto;
  display: block;
}

.navbar__logo-text {
  font-size: 1.2rem;
  font-weight: 600;
  color: inherit;
}

/* Nav links */
.navbar__links {
  display: flex;
  align-items: center;
  gap: var(--sp-xs);
}
.navbar__link {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: rgba(255,255,255,.75);
  padding: 7px 14px;
  border-radius: var(--r-sm);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.navbar__link:hover, .navbar__link.is-active {
  color: var(--white);
  background: rgba(255,255,255,.1);
}

/* Dropdown */
.navbar__dropdown { position: relative; }
.navbar__dropdown-toggle {
  display: flex; align-items: center; gap: 5px;
  cursor: pointer;
}
.navbar__dropdown-toggle .chevron {
  transition: transform var(--dur) var(--ease);
  font-size: 0.7rem;
}
.navbar__dropdown.is-open .chevron { transform: rotate(180deg); }
.navbar__dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 220px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(-6px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.navbar__dropdown.is-open .navbar__dropdown-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.navbar__dropdown-item {
  display: block;
  padding: 9px 14px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--r-sm);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.navbar__dropdown-item:hover {
  background: var(--cloud);
  color: var(--blue-dark);
}

/* CTA in nav */
.navbar__cta { margin-left: var(--sp-md); }

/* Hamburger (mobile) */
.navbar__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: background var(--dur) var(--ease);
}
.navbar__hamburger:hover { background: rgba(255,255,255,.1); }
.navbar__hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.navbar__hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.navbar__hamburger.is-open span:nth-child(2) { opacity: 0; }
.navbar__hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav */
.navbar__mobile {
  display: none;
  position: fixed;
  top: var(--navbar-h);
  left: 0; right: 0;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: var(--sp-md) var(--sp-lg) var(--sp-lg);
  box-shadow: var(--shadow-lg);
}
.navbar__mobile.is-open { display: block; }
.navbar__mobile-link {
  display: block;
  padding: 12px 0;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  transition: color var(--dur) var(--ease);
}
.navbar__mobile-link:last-of-type { border-bottom: none; }
.navbar__mobile-link:hover { color: var(--blue); }
.navbar__mobile-cta { margin-top: var(--sp-md); width: 100%; justify-content: center; }

/* ── Footer ─────────────────────────────────────────────── */
.footer {
  background: var(--navy);
  color: rgba(255,255,255,.7);
  padding: var(--sp-3xl) 0 0;
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--sp-2xl);
  padding-bottom: var(--sp-2xl);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer__brand { max-width: 300px; }
.footer__logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--white);
  margin-bottom: var(--sp-md);
}
.footer__logo-mark {
  width: 34px; height: 34px;
  background: var(--white);
  border-radius: var(--r-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--white);
  font-size: 0.95rem;
  flex-shrink: 0;
}
.footer__tagline { font-size: 0.9rem; line-height: 1.7; }

.footer__col h4 {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: var(--sp-md);
}
.footer__col li { margin-bottom: 10px; }
.footer__col a {
  font-size: 0.9rem;
  color: rgba(255,255,255,.6);
  transition: color var(--dur) var(--ease);
}
.footer__col a:hover { color: var(--blue); }
.footer__col li i {
  color: var(--blue);
  width: 16px;
  margin-right: 8px;
}

.footer__bottom {
  padding: var(--sp-lg) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-md);
  font-size: 0.82rem;
}
.footer__bottom a {
  color: rgba(255,255,255,.5);
  transition: color var(--dur) var(--ease);
}
.footer__bottom a:hover { color: var(--blue); }
.footer__bottom-links { display: flex; gap: var(--sp-lg); }

/* ── Scroll-to-top ──────────────────────────────────────── */
.scroll-top {
  position: fixed;
  bottom: 28px; right: 28px;
  width: 46px; height: 46px;
  background: var(--navy);
  color: var(--white);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
  z-index: 800;
}
.scroll-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.scroll-top:hover { background: var(--blue); }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-xl);
  }
  .footer__brand { grid-column: 1 / -1; max-width: 100%; }
}

@media (max-width: 768px) {
  .navbar__links { display: none; }
  .navbar__cta   { display: none; }
  .navbar__hamburger { display: flex; }

  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 500px) {
  .footer__grid { grid-template-columns: 1fr; }
}