/* ============================================================
   SENTRIQ — public/styles.css
   Dark cybersecurity aesthetic. Vanilla CSS, no frameworks.
   ------------------------------------------------------------
   Sections:
     1. Reset & base
     2. Tokens (colors, spacing, typography)
     3. Layout primitives (container, grid, utils)
     4. Background FX (particles, grid overlay)
     5. Header & nav
     6. Buttons & chips
     7. Hero
     8. Sections (features, products, why, trust)
     9. Cards
    10. Forms
    11. Footer
    12. Legal pages
    13. Reveal / animations
    14. Responsive
   ============================================================ */

/* -------- 1. Reset & base -------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; background: none; border: none; color: inherit; cursor: pointer; }
input, textarea { font: inherit; }

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

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  padding: 10px 18px;
  background: var(--accent);
  color: #000;
  font-weight: 600;
  border-radius: 6px;
  z-index: 9999;
  transition: top .2s;
}
.skip-link:focus { top: 16px; }

/* -------- 2. Tokens -------- */
:root {
  --bg: #050a14;
  --bg-alt: #0a1224;
  --bg-elev: #0f1a30;
  --surface: rgba(255,255,255,0.03);
  --surface-hover: rgba(255,255,255,0.06);
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(0,255,200,0.25);
  --text: #e6edf3;
  --text-muted: #8b949e;
  --text-dim: #6b7280;
  --accent: #00ffc8;
  --accent-2: #00b785;
  --accent-glow: rgba(0,255,200,0.35);
  --danger: #ff5577;
  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 22px;
  --shadow-glow: 0 0 40px rgba(0,255,200,0.15);
  --shadow-card: 0 10px 40px rgba(0,0,0,0.4);
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --container: 1200px;
  --ease: cubic-bezier(.2,.8,.2,1);
}

/* Light theme (opt-in via [data-theme="light"]) */
html[data-theme="light"] {
  --bg: #f7fafc;
  --bg-alt: #ffffff;
  --bg-elev: #ffffff;
  --surface: rgba(0,0,0,0.02);
  --surface-hover: rgba(0,0,0,0.05);
  --border: rgba(0,0,0,0.08);
  --border-strong: rgba(0,140,100,0.35);
  --text: #0b1220;
  --text-muted: #4b5563;
  --text-dim: #6b7280;
  --accent: #00a074;
  --accent-2: #007856;
  --accent-glow: rgba(0,160,116,0.3);
}

/* -------- 3. Layout primitives -------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
section { position: relative; padding: 100px 0; }
section.alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 64px; }
.kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-block;
  margin-bottom: 16px;
  padding: 6px 14px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: rgba(0,255,200,0.04);
}
h1, h2, h3, h4 { letter-spacing: -0.02em; line-height: 1.15; color: var(--text); }
h1 { font-size: clamp(2.2rem, 5vw, 4rem); font-weight: 800; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); font-weight: 800; }
h3 { font-size: 1.25rem; font-weight: 700; }
p  { color: var(--text-muted); font-size: 1rem; }
.lead { font-size: 1.15rem; color: var(--text-muted); max-width: 640px; margin: 0 auto; }

.gradient-text {
  background: linear-gradient(135deg, #fff 0%, var(--accent) 50%, #00b785 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

.u-center { text-align: center; }
.u-mt-16 { margin-top: 16px; }
.u-mt-32 { margin-top: 32px; }
.u-mt-48 { margin-top: 48px; }
.u-flex { display: flex; align-items: center; gap: 12px; }
.u-flex-center { display: flex; align-items: center; gap: 12px; }

/* -------- 4. Background FX -------- */
.particle-bg {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.85;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,255,200,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,255,200,0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 30%, #000 0%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, #000 0%, transparent 80%);
  pointer-events: none;
  z-index: 0;
}
main, header, footer, section { position: relative; z-index: 1; }

/* -------- 5. Header -------- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(5,10,20,0.65);
  border-bottom: 1px solid transparent;
  transition: transform .3s var(--ease), background .3s var(--ease), border-color .3s var(--ease);
}
.header.scrolled {
  background: rgba(5,10,20,0.85);
  border-bottom-color: var(--border);
}
.header.hide { transform: translateY(-100%); }
html[data-theme="light"] .header { background: rgba(255,255,255,0.75); }

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 2px;
}
.header-logo span { color: var(--text); }
.header-logo .dot { color: var(--accent); }

.nav {
  display: flex;
  gap: 32px;
  font-size: 0.92rem;
  font-weight: 500;
}
.nav a {
  color: var(--text-muted);
  transition: color .2s;
  position: relative;
}
.nav a:hover { color: var(--text); }
.nav a::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform .25s var(--ease);
  transform-origin: right;
}
.nav a:hover::after { transform: scaleX(1); transform-origin: left; }

.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  background: var(--surface);
}
.lang-toggle button {
  padding: 6px 12px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  transition: all .2s;
}
.lang-toggle button.active {
  background: var(--accent);
  color: #001812;
}

.theme-toggle {
  width: 36px; height: 36px;
  border: 1px solid var(--border);
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all .2s;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--border-strong); }
.theme-toggle .theme-icon-moon { display: none; }
html[data-theme="light"] .theme-toggle .theme-icon-sun { display: none; }
html[data-theme="light"] .theme-toggle .theme-icon-moon { display: block; }

.mobile-menu-btn {
  display: none;
  width: 40px; height: 40px;
  color: var(--text);
}
.mobile-menu-btn svg { width: 22px; height: 22px; }

.mobile-nav {
  display: none;
  flex-direction: column;
  padding: 20px 24px 28px;
  background: rgba(5,10,20,0.95);
  border-top: 1px solid var(--border);
  gap: 16px;
}
.mobile-nav.open { display: flex; }
.mobile-nav a { color: var(--text); font-weight: 500; padding: 8px 0; }
.mobile-nav .lang-toggle { margin-top: 8px; align-self: flex-start; }

/* -------- 6. Buttons & chips -------- */
.btn-primary, .btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all .25s var(--ease);
  white-space: nowrap;
  font-family: var(--mono);
  letter-spacing: 0.5px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #001812;
  box-shadow: 0 0 0 0 var(--accent-glow), 0 8px 30px rgba(0,255,200,0.2);
}
.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 0 0 4px var(--accent-glow), 0 12px 40px rgba(0,255,200,0.3);
}
.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border-strong);
}
.btn-secondary:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.chip {
  display: inline-block;
  padding: 4px 10px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  border-radius: 999px;
  background: rgba(0,255,200,0.08);
  color: var(--accent);
  border: 1px solid var(--border-strong);
}
.chip.neutral {
  background: var(--surface);
  color: var(--text-muted);
  border-color: var(--border);
}
.chip.warn {
  background: rgba(255,200,80,0.08);
  color: #ffc850;
  border-color: rgba(255,200,80,0.3);
}

/* -------- 7. Hero -------- */
.hero {
  padding: 180px 0 120px;
  overflow: hidden;
}
.hero-inner {
  max-width: 880px;
  margin: 0 auto;
  text-align: center;
  position: relative;
}
.hero h1 {
  margin: 20px 0 24px;
}
.hero p.lead {
  margin: 0 auto 40px;
  font-size: 1.2rem;
}
.hero-ctas {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.hero-terminal {
  margin: 60px auto 0;
  max-width: 680px;
  background: rgba(0,0,0,0.55);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-glow), var(--shadow-card);
  overflow: hidden;
  text-align: left;
  font-family: var(--mono);
  font-size: 0.85rem;
  backdrop-filter: blur(6px);
}
.hero-terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--border);
}
.hero-terminal-bar span {
  width: 11px; height: 11px; border-radius: 50%;
  background: rgba(255,255,255,0.15);
}
.hero-terminal-bar span:nth-child(1) { background: #ff5f56; }
.hero-terminal-bar span:nth-child(2) { background: #ffbd2e; }
.hero-terminal-bar span:nth-child(3) { background: #27c93f; }
.hero-terminal-bar em {
  margin-left: 10px;
  font-style: normal;
  color: var(--text-dim);
  font-size: 11px;
}
.hero-terminal-body { padding: 18px 20px; color: var(--text-muted); }
.hero-terminal-body .line { margin: 4px 0; }
.hero-terminal-body .prompt { color: var(--accent); }
.hero-terminal-body .ok     { color: #27c93f; }
.hero-terminal-body .warn   { color: #ffbd2e; }
.hero-terminal-body .err    { color: #ff5f56; }
.hero-terminal-body .dim    { color: var(--text-dim); }

/* -------- 8. Sections -------- */
.features-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding: 30px 0;
}
.feature-pill {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all .25s var(--ease);
}
.feature-pill:hover {
  border-color: var(--border-strong);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}
.feature-pill .icon {
  width: 42px; height: 42px;
  border-radius: 10px;
  background: rgba(0,255,200,0.08);
  border: 1px solid var(--border-strong);
  display: grid;
  place-items: center;
  color: var(--accent);
  flex-shrink: 0;
}
.feature-pill h4 { font-size: 0.95rem; margin-bottom: 2px; }
.feature-pill p { font-size: 0.82rem; color: var(--text-dim); margin: 0; }

.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.why-card {
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  transition: all .3s var(--ease);
}
.why-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, var(--accent-glow), transparent 70%);
  opacity: 0;
  transition: opacity .4s;
  pointer-events: none;
}
.why-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-4px);
}
.why-card:hover::before { opacity: 0.3; }
.why-card .num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 2px;
}
.why-card h3 { margin: 10px 0 12px; }

.trust-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 40px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  flex-wrap: wrap;
}
.trust-strip .kicker { margin: 0; }
.trust-strip a {
  color: var(--text);
  font-weight: 600;
  border-bottom: 1px dashed var(--border-strong);
  padding-bottom: 2px;
  transition: color .2s;
}
.trust-strip a:hover { color: var(--accent); }

/* -------- 9. Product cards -------- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}
.product-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: all .3s var(--ease);
  display: flex;
  flex-direction: column;
  min-height: 320px;
}
.product-card::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, transparent, var(--accent), transparent);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity .3s;
  pointer-events: none;
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow), var(--shadow-card);
}
.product-card:hover::after { opacity: 1; }
.product-card.soon { opacity: 0.7; }
.product-card.soon:hover { transform: none; box-shadow: none; }

.product-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 18px;
}
.product-card h3 {
  font-family: var(--mono);
  font-size: 1.3rem;
  letter-spacing: 1px;
}
.product-card p { margin-bottom: 20px; flex: 1; }
.product-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}
.product-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  transition: gap .25s;
  align-self: flex-start;
}
.product-cta:hover { gap: 14px; }
.product-cta.disabled { color: var(--text-dim); pointer-events: none; }

/* -------- 10. Forms / contact -------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: start;
}
.contact-card {
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.contact-card h3 { margin-bottom: 14px; }
.contact-card p { margin-bottom: 12px; }
.contact-card a.inline {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.9rem;
  border-bottom: 1px dashed var(--border-strong);
}
.contact-card a.inline:hover { color: var(--text); }

.cta-band {
  text-align: center;
  padding: 80px 40px;
  background: radial-gradient(ellipse at center, rgba(0,255,200,0.08), transparent 70%), var(--bg-alt);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  margin: 80px auto;
  max-width: 900px;
  position: relative;
  overflow: hidden;
}
.cta-band h2 { margin-bottom: 18px; }
.cta-band p { margin-bottom: 32px; }
.cta-band .hero-ctas { justify-content: center; }

/* -------- 11. Footer -------- */
.footer {
  padding: 60px 0 30px;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 1;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand { max-width: 320px; }
.footer-brand .header-logo { margin-bottom: 16px; }
.footer-brand p { font-size: 0.88rem; color: var(--text-dim); }
.footer-col h5 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  padding: 6px 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color .2s;
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-dim);
}
.footer-bottom .mono { font-family: var(--mono); }

/* -------- 12. Legal pages -------- */
.legal {
  padding: 160px 0 80px;
}
.legal .container { max-width: 780px; }
.legal .back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 32px;
}
.legal .back-link:hover { color: var(--text); }
.legal h1 { margin-bottom: 10px; }
.legal .updated {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  letter-spacing: 1px;
  margin-bottom: 48px;
}
.legal h2 {
  font-size: 1.3rem;
  margin-top: 40px;
  margin-bottom: 14px;
  color: var(--text);
}
.legal p, .legal li {
  color: var(--text-muted);
  margin-bottom: 14px;
  line-height: 1.8;
}
.legal ul { padding-left: 22px; margin-bottom: 14px; }
.legal a { color: var(--accent); border-bottom: 1px dashed var(--border-strong); }

/* -------- 13. Reveal / animations -------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.visible { opacity: 1; transform: none; }

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 var(--accent-glow); }
  50%      { box-shadow: 0 0 0 12px transparent; }
}
.pulse { animation: pulse-glow 2.5s var(--ease) infinite; }

@keyframes blink {
  0%, 60% { opacity: 1; }
  61%, 100% { opacity: 0; }
}
.cursor { display: inline-block; width: 8px; background: var(--accent); animation: blink 1s steps(1) infinite; margin-left: 2px; }

/* Prefers reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* -------- 14. Responsive -------- */
@media (max-width: 960px) {
  .nav { display: none; }
  .mobile-menu-btn { display: inline-flex; }
  .header-inner .u-flex-center { display: none; }
  .features-strip { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  section { padding: 70px 0; }
  .hero { padding: 140px 0 80px; }
  .features-strip { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; }
  .cta-band { padding: 50px 24px; margin: 60px 16px; }
  .hero-ctas { flex-direction: column; align-items: stretch; }
  .btn-primary, .btn-secondary { justify-content: center; }
}