/* ===================================================================
   CNSTECH Support Page – styles.css
   Dark navy / blue / cyan technical visual language
   Mobile-first, CSS Variables, semantic HTML
   =================================================================== */

/* ── CSS Variables ── */
:root {
  --bg-primary: #0b1220;
  --bg-secondary: #111c2f;
  --panel: #f4f7fb;
  --text-primary: #eef4ff;
  --text-secondary: #b7c5dd;
  --text-dark: #0d182a;
  --accent: #2388ff;
  --accent-strong: #00b8ff;
  --success: #2bd6c4;
  --border-soft: rgba(255, 255, 255, 0.12);
  --shadow: 0 18px 40px rgba(3, 8, 19, 0.35);
  --radius-lg: 1.15rem;
  --radius-md: 0.85rem;
  --maxw: 1200px;
  --ease: 240ms cubic-bezier(.2, .7, .2, 1);
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Aptos", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color: var(--text-primary);
  background:
    radial-gradient(circle at 10% 10%, rgba(35, 136, 255, 0.18) 0, transparent 40%),
    radial-gradient(circle at 90% 5%, rgba(0, 184, 255, 0.14) 0, transparent 34%),
    linear-gradient(180deg, #070d18 0%, #0b1220 45%, #0b1324 100%);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent-strong); text-decoration: none; transition: color var(--ease); }
a:hover { color: #fff; }

/* ── Container ── */
.container {
  width: min(calc(100% - 2rem), var(--maxw));
  margin-inline: auto;
}

/* ── Section ── */
.section { padding: clamp(3.5rem, 4vw, 5.25rem) 0; }

/* ── Network Background Pattern ── */
.network-bg {
  position: relative;
  isolation: isolate;
  overflow: hidden;
}
.network-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle at center, rgba(0,0,0,.8), transparent 78%);
  -webkit-mask-image: radial-gradient(circle at center, rgba(0,0,0,.8), transparent 78%);
  z-index: -2;
}
.network-bg::after {
  content: "";
  position: absolute;
  inset: -20% -10%;
  background:
    radial-gradient(circle at 30% 40%, rgba(35,136,255,.22), transparent 40%),
    radial-gradient(circle at 75% 65%, rgba(43,214,196,.18), transparent 42%);
  z-index: -1;
}

/* ── Typography ── */
h1, h2, h3 {
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 .55rem;
}
p { margin: 0 0 1rem; }
.text-center { text-align: center; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-size: .8rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent-strong);
  margin-bottom: .85rem;
  font-weight: 700;
}
.eyebrow::before {
  content: "";
  width: 1.6rem;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-strong));
}
.center-eyebrow {
  justify-content: center;
  display: flex;
}

.lead, .section-lead {
  color: var(--text-secondary);
  max-width: 70ch;
  font-size: clamp(1rem, 1.4vw, 1.12rem);
  margin-bottom: 1.35rem;
}
.center-copy {
  max-width: 65ch;
  margin: 0 auto 1rem;
  color: var(--text-secondary);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55rem;
  border: 1px solid transparent;
  border-radius: .75rem;
  text-decoration: none;
  font-weight: 700;
  font-size: .95rem;
  padding: .85rem 1.15rem;
  transition: transform var(--ease), box-shadow var(--ease), background var(--ease), border-color var(--ease), color var(--ease);
  cursor: pointer;
}
.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #1678f8, #00a9ff);
  box-shadow: 0 12px 30px rgba(22,120,248,.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  color: #fff;
}
.btn-ghost {
  color: var(--text-primary);
  border-color: var(--border-soft);
  background: rgba(255,255,255,0.04);
}
.btn-ghost:hover {
  border-color: var(--accent-strong);
  color: #fff;
  transform: translateY(-2px);
}

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: rgba(7, 13, 24, 0.82);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.header-inner {
  min-height: 4.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: #fff;
}
.brand-logo {
  display: block;
  width: 154px;
  height: auto;
  max-height: 44px;
  object-fit: contain;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 1.1rem;
}
.site-nav a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 600;
  transition: color var(--ease);
  font-size: .95rem;
}
.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a.active {
  color: #fff;
}
.menu-toggle {
  display: none;
  background: transparent;
  color: #fff;
  border: 1px solid var(--border-soft);
  border-radius: .6rem;
  padding: .45rem .65rem;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

/* ── Hero ── */
.hero {
  padding: clamp(4rem, 6vw, 6.5rem) 0 4rem;
}
.hero-content {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}
.hero-content h1 {
  font-size: clamp(2rem, 5vw, 3.35rem);
  margin-bottom: 1rem;
  color: #fff;
}
.hero-actions {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 1.15rem;
}
.center-actions {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* Trust strip */
.trust-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .6rem;
  margin-top: 1.15rem;
}
.trust-item {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 999px;
  padding: .42rem .7rem;
  font-size: .8rem;
  color: var(--text-secondary);
  background: rgba(255,255,255,.04);
}

/* ── Cards Grid ── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.3rem;
}
.card {
  background: linear-gradient(170deg, rgba(255,255,255,.08), rgba(255,255,255,.03));
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
  display: flex;
  flex-direction: column;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(35, 136, 255, .55);
  box-shadow: 0 18px 34px rgba(4,12,24,.35);
}
.card-icon {
  width: 2.6rem;
  height: 2.6rem;
  border-radius: .65rem;
  display: inline-grid;
  place-items: center;
  margin-bottom: .8rem;
  border: 1px solid rgba(255,255,255,.16);
  background: rgba(35, 136, 255, 0.15);
  color: #a8dcff;
}
.card h3 {
  font-size: 1.08rem;
  margin-bottom: .45rem;
  color: #fff;
}
.card p {
  font-size: .93rem;
  color: var(--text-secondary);
  margin: 0 0 .8rem;
  flex-grow: 1;
}
.card-cta {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: .88rem;
  font-weight: 600;
  color: var(--accent-strong);
  text-decoration: none;
  transition: gap var(--ease), color var(--ease);
}
.card-cta:hover {
  gap: .55rem;
  color: #fff;
}

/* ── Split Layout ── */
.split {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 2rem;
  align-items: center;
}

/* ── Checklist ── */
.checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .65rem;
}
.checklist li {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: .8rem;
  padding: .85rem 1rem;
  display: flex;
  gap: .7rem;
  align-items: flex-start;
  color: var(--text-secondary);
  font-size: .95rem;
  line-height: 1.5;
}
.check-icon {
  color: var(--success);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ── Process Grid ── */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.3rem;
}
.process-step {
  background: linear-gradient(165deg, rgba(255,255,255,.1), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.12);
  border-radius: .95rem;
  padding: 1.2rem;
}
.step-number {
  width: 2.2rem;
  height: 2.2rem;
  display: inline-grid;
  place-items: center;
  border-radius: .6rem;
  font-weight: 800;
  font-size: .95rem;
  color: #fff;
  background: linear-gradient(135deg, #1f7fff, #00b5ff);
  margin-bottom: .75rem;
}
.process-step h3 {
  font-size: 1.05rem;
  color: #fff;
  margin-bottom: .4rem;
}
.process-step p {
  font-size: .9rem;
  color: var(--text-secondary);
  margin: 0;
}

/* ── FAQ Accordion ── */
.faq-list {
  max-width: 800px;
  margin: 1.3rem auto 0;
  display: grid;
  gap: .6rem;
}
.faq-item {
  background: linear-gradient(170deg, rgba(255,255,255,.07), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--ease);
}
.faq-item[open] {
  border-color: rgba(35, 136, 255, .45);
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  padding: 1rem 1.2rem;
  list-style: none;
  font-weight: 600;
  color: #fff;
  font-size: .98rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::marker { display: none; content: ""; }
.faq-question { flex: 1; }
.faq-chevron {
  transition: transform var(--ease);
  color: var(--accent-strong);
  flex-shrink: 0;
}
.faq-item[open] .faq-chevron {
  transform: rotate(180deg);
}
.faq-answer {
  padding: 0 1.2rem 1.1rem;
  color: var(--text-secondary);
  font-size: .94rem;
  line-height: 1.65;
}
.faq-answer a {
  color: var(--accent-strong);
  text-decoration: underline;
}
.faq-answer a:hover { color: #fff; }

/* ── CTA Final ── */
.cta-final {
  text-align: center;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3.5vw, 2.6rem);
  background: linear-gradient(130deg, rgba(35,136,255,.18), rgba(43,214,196,.12));
}
.cta-final h2 {
  color: #fff;
  margin-bottom: .6rem;
}

/* ── Footer ── */
footer {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 2.3rem 0 1rem;
  background: #070d18;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1fr;
  gap: 1.2rem;
}
.footer-logo {
  margin-bottom: .7rem;
  width: 130px;
}
.footer-summary {
  color: var(--text-secondary);
  max-width: 36ch;
  font-size: .9rem;
}
footer h4 {
  color: #fff;
  font-size: .95rem;
  margin-bottom: .65rem;
}
footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: .5rem;
}
footer li {
  display: flex;
  align-items: center;
  gap: .45rem;
}
footer a, footer span {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: .92rem;
}
footer a:hover { color: #fff; }
footer svg { flex-shrink: 0; color: var(--accent); }
.copyright {
  color: rgba(255,255,255,.45);
  font-size: .82rem;
  margin-top: 1.4rem;
  text-align: center;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .split { grid-template-columns: 1fr; }
  .cards-grid, .process-grid, .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .menu-toggle { display: inline-flex; }
  .site-nav {
    position: absolute;
    inset: 4.5rem 1rem auto 1rem;
    padding: .9rem;
    border-radius: .9rem;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    background: rgba(8,16,31,.96);
    border: 1px solid var(--border-soft);
    box-shadow: var(--shadow);
  }
  .site-nav[data-open="true"] { display: flex; }
  .brand-logo { width: 132px; }
  .cards-grid, .process-grid, .footer-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 3rem; }
  .hero-content h1 { font-size: clamp(1.75rem, 6vw, 2.4rem); }
}

/* ── Print ── */
@media print {
  body { background: #fff; color: #000; }
  .site-header, .menu-toggle, .hero-actions, .trust-strip, .center-actions { display: none; }
  .card, .process-step, .faq-item, .checklist li { border: 1px solid #ccc; background: #fff; color: #000; }
  footer { background: #fff; color: #000; border-top: 1px solid #ccc; }
}