/* ==========================================================================
   Vyuha Design System
   Theme concept: "Security Seal" — deep espresso + foil-gold, evoking a
   banknote/certificate security print rather than a generic tech-blue app.
   Signature element: a fine concentric "guilloché" line texture (the same
   engraved-line pattern used on banknotes and official seals) behind the
   hero, plus circular "wax-seal" icon badges instead of flat squares.
   ========================================================================== */
@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@300;400;500;600;700&display=swap");

:root {
  --bg-dark: #1a1512;
  --bg-card: #241d17;
  --bg-light: #f6efe0;
  --text-heading: #f6efe0;
  --text-body: #cbbfa8;
  --text-muted: #8f8371;
  --text-dark: #1a1512;
  --accent-primary: #b8860b;
  --accent-hover: #96690a;
  --accent-light: #e8c468;
  --whatsapp: #25d366;
  --whatsapp-hover: #1e8855;
  --border-color: #3a2f22;
  --font-main: "Inter", system-ui, -apple-system, sans-serif;
  --font-display:
    "Space Grotesk", "Inter", system-ui, -apple-system, sans-serif;
  --radius-sm: 0.5rem;
  --radius-md: 0.875rem;
  --radius-lg: 1.35rem;
  --radius-full: 9999px;
  --transition: all 0.25s ease-in-out;
  --focus-ring: 0 0 0 3px rgba(232, 196, 104, 0.45);
}
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}
img,
svg,
video {
  max-width: 100%;
  height: auto;
  display: block;
}
body {
  font-family: var(--font-main);
  background-color: var(--bg-dark);
  color: var(--text-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
.container {
  width: 100%;
  max-width: 75rem; /* 1200px */
  margin: 0 auto;
  padding: 0 1.5rem;
}
a:focus-visible,
button:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
/* Respect reduced-motion preferences */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}
/* ==========================================================================
   Header & Responsive Navigation Drawer
   ========================================================================== */
.site-header {
  background-color: rgba(26, 21, 18, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 0.85rem 0;
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-heading);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.brand-logo-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  object-fit: contain;
}
.brand-logo-text {
  line-height: 1;
}
.brand-accent {
  color: var(--accent-light);
  font-weight: 500;
}
.nav-wrapper {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.25rem;
}
.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition);
}
.nav-link:hover {
  color: var(--accent-light);
}
.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  flex-direction: column;
  gap: 5px;
  z-index: 1001;
}
.hamburger-bar {
  width: 24px;
  height: 2px;
  background-color: var(--text-heading);
  border-radius: 2px;
  transition: var(--transition);
}
/* ==========================================================================
   Buttons & Interactive Elements
   "Keycap" buttons: a soft top highlight + bottom shadow makes them feel
   pressable; hover/active nudges the button DOWN (like pressing a key)
   instead of the usual lift-up hover.
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-full);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-primary {
  background-color: var(--accent-primary);
  color: #1a1512;
  border-color: var(--accent-primary);
  box-shadow:
    0 3px 0 0 var(--accent-hover),
    0 6px 14px -4px rgba(184, 134, 11, 0.4);
}
.btn-primary:hover {
  background-color: var(--accent-light);
  border-color: var(--accent-light);
  transform: translateY(2px);
  box-shadow:
    0 1px 0 0 var(--accent-hover),
    0 3px 8px -2px rgba(184, 134, 11, 0.35);
}
.btn-outline {
  background-color: transparent;
  color: var(--accent-light);
  border-color: var(--accent-light);
}
.btn-outline:hover {
  background-color: var(--accent-light);
  color: var(--text-dark);
}
.btn-whatsapp {
  background-color: rgba(37, 211, 102, 0.1);
  color: var(--whatsapp);
  border-color: rgba(37, 211, 102, 0.4);
}
.btn-whatsapp:hover {
  background-color: var(--whatsapp);
  color: #ffffff;
  border-color: var(--whatsapp);
  transform: translateY(2px);
  box-shadow: 0 3px 8px -2px rgba(37, 211, 102, 0.35);
}
.btn-block {
  display: flex;
  width: 100%;
}
/* ==========================================================================
   Hero Section
   Signature texture: a faint concentric "guilloché" line pattern — the same
   engraved-line technique used on banknotes and official certificates —
   sits behind the hero to signal "this is a security product" without a
   single line of extra markup.
   ========================================================================== */
.hero-section {
  padding: 5rem 0;
  position: relative;
  background-image: repeating-radial-gradient(
    circle at 88% 8%,
    rgba(232, 196, 104, 0.07) 0px,
    rgba(232, 196, 104, 0.07) 1px,
    transparent 1px,
    transparent 9px
  );
  background-size: 100% 100%;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: start;
  position: relative;
}
.hero-content,
.hero-visual {
  min-width: 0;
}
.status-badge {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  max-width: 100%;
  gap: 0.5rem;
  background-color: rgba(232, 196, 104, 0.1);
  border: 1px solid rgba(232, 196, 104, 0.35);
  color: var(--accent-light);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}
.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-light);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-light);
}
.hero-heading {
  font-family: var(--font-display);
  color: var(--text-heading);
  font-size: clamp(1.75rem, 5vw + 0.5rem, 2.75rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}
.hero-description {
  font-size: 1.05rem;
  margin-bottom: 2rem;
  color: var(--text-body);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.btn-text-wrapper {
  display: flex;
  flex-direction: column;
  text-align: left;
}
.btn-main-text {
  font-weight: 600;
  line-height: 1.2;
}
.btn-subtext {
  font-size: 0.725rem;
  opacity: 0.85;
}
.system-compatibility-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
}
.image-frame {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.55);
  position: relative;
}
.image-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border: 1px solid rgba(232, 196, 104, 0.25);
  border-radius: var(--radius-md);
}
.hero-school-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}
/* ==========================================================================
   Checksum Verification Card — styled like an authentication stamp
   ========================================================================== */
.checksum-card {
  width: 100%;
  max-width: 100%;
  margin: 1.5rem 0 0 0;
  background-color: var(--bg-card);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-sizing: border-box;
}
.checksum-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--accent-light);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.85rem;
}
.checksum-instructions {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  line-height: 1.5;
}
.checksum-command {
  display: block;
  background-color: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.85rem;
  font-family: monospace;
  font-size: 0.8rem;
  color: var(--text-heading);
  margin-bottom: 1rem;
  overflow-x: auto;
  white-space: nowrap;
}
.checksum-value-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background-color: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.85rem;
}
.checksum-value {
  font-family: monospace;
  font-size: 0.7rem;
  color: var(--accent-light);
  word-break: break-all;
  overflow-wrap: break-word;
  flex: 1 1 100%;
  line-height: 1.4;
}
.btn-copy {
  flex-shrink: 0;
  background-color: var(--accent-primary);
  color: #1a1512;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.9rem;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  align-self: flex-end;
}
.btn-copy:hover {
  background-color: var(--accent-light);
}
/* ==========================================================================
   Trust Strip
   ========================================================================== */
.trust-strip {
  background-color: rgba(184, 134, 11, 0.07);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem 0;
}
.trust-strip-inner {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: var(--text-body);
  font-weight: 500;
}
.trust-item svg {
  color: var(--accent-light);
  flex-shrink: 0;
}
/* ==========================================================================
   Features Component System
   ========================================================================== */
.features-section,
.interface-section,
.requirements-section,
.pricing-section,
.testimonials-section,
.faq-section,
.contact-section {
  padding: 4.5rem 0;
  border-top: 1px solid var(--border-color);
}
.section-header {
  text-align: center;
  max-width: 50rem;
  margin: 0 auto 3rem auto;
}
.section-kicker {
  color: var(--accent-light);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 0.5rem;
}
.section-title {
  font-family: var(--font-display);
  color: var(--text-heading);
  font-size: clamp(1.5rem, 3.5vw + 0.5rem, 2rem);
  font-weight: 700;
  line-height: 1.25;
}
.section-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
}
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 3rem;
}
.feature-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-primary);
  box-shadow: 0 12px 25px -8px rgba(0, 0, 0, 0.5);
}
/* Wax-seal icon badge: circular instead of a flat rounded square */
.card-icon-wrapper {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background-color: rgba(232, 196, 104, 0.12);
  border: 1px solid rgba(232, 196, 104, 0.3);
  color: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}
.card-title {
  font-family: var(--font-display);
  color: var(--text-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}
.card-description {
  font-size: 0.925rem;
  color: var(--text-muted);
}
/* ==========================================================================
   Compact User Manual Download Card
   ========================================================================== */
.download-manual-container {
  display: flex;
  justify-content: center;
  width: 100%;
  margin-top: 1rem;
}
.btn-manual-download {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  background-color: var(--bg-card);
  border: 1px solid var(--accent-primary);
  border-radius: var(--radius-md);
  padding: 0.65rem 1.15rem;
  text-decoration: none;
  width: fit-content;
  max-width: 100%;
  transition: var(--transition);
}
.btn-manual-download:hover {
  border-color: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(184, 134, 11, 0.3);
}
.pdf-icon {
  color: var(--accent-light);
  flex-shrink: 0;
}
.btn-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  text-align: left;
}
.btn-main-label {
  color: var(--text-heading);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.2;
}
.btn-sub-label {
  color: var(--text-muted);
  font-size: 0.825rem;
  font-weight: 400;
  line-height: 1.25;
}
/* ==========================================================================
   Interface & System Requirements
   ========================================================================== */
.interface-img {
  width: 100%;
  max-width: 30rem;
  display: block;
  margin: 0 auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}
.requirements-matrix {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  background-color: var(--bg-card);
  color: var(--text-body);
  padding: 3rem 2rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.35);
}
.req-column {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.req-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-light);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.req-detail {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--text-heading);
  line-height: 1.4;
}
/* ==========================================================================
   Pricing & Testimonials
   Pricing card reads like a wax-sealed certificate: dashed gold edge,
   deep card body.
   ========================================================================== */
.pricing-card {
  max-width: 28rem;
  margin: 0 auto;
  background-color: var(--bg-card);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  text-align: center;
  position: relative;
}
.pricing-card::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px dashed rgba(232, 196, 104, 0.25);
  border-radius: calc(var(--radius-lg) - 6px);
  pointer-events: none;
}
.plan-type {
  font-weight: 600;
  color: var(--accent-light);
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}
.price {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw + 0.5rem, 2.75rem);
  font-weight: 700;
  color: var(--text-heading);
  margin: 1rem 0 0.25rem;
}
.price-period {
  font-size: 1rem;
  color: var(--text-muted);
}
.price-context {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}
.pricing-details {
  list-style: none;
  margin-bottom: 2rem;
  text-align: left;
}
.pricing-details li {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.95rem;
}
.pricing-fineprint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 1rem;
}
.pricing-fineprint a {
  color: var(--accent-light);
  text-decoration: none;
}
.pricing-fineprint a:hover {
  text-decoration: underline;
}
.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
.testimonial-card {
  background-color: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.quote-mark {
  font-size: 3rem;
  line-height: 1;
  color: var(--accent-light);
  font-family: serif;
}
.card-footer {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1.5rem;
}
.avatar-wrap img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border-color);
}
.author-name {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--text-heading);
}
.author-role {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.1rem;
}
/* ==========================================================================
   FAQ
   ========================================================================== */
.faq-list {
  max-width: 44rem;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.faq-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.4rem;
}
.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text-heading);
  font-size: 0.98rem;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: "+";
  color: var(--accent-light);
  font-size: 1.3rem;
  font-weight: 400;
  margin-left: 1rem;
  transition: var(--transition);
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
}
.faq-item p {
  margin-top: 0.85rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.faq-item a {
  color: var(--accent-light);
}
/* ==========================================================================
   Contact & Footer
   ========================================================================== */
.contact-info {
  text-align: center;
  font-size: 1.1rem;
}
.contact-whatsapp-btn {
  margin-top: 1.5rem;
}
.site-footer {
  background-color: #120e0b;
  padding: 3rem 0 1.5rem 0;
  border-top: 1px solid var(--border-color);
}
.footer-content {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.footer-company-title {
  font-family: var(--font-display);
  color: var(--text-heading);
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}
.footer-legal-notice {
  font-size: 0.825rem;
  color: var(--text-muted);
  max-width: 38rem;
}
.footer-navigation {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}
.footer-policy-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.policy-link {
  color: var(--text-body);
  text-decoration: none;
  font-size: 0.85rem;
}
.policy-link:hover {
  color: var(--accent-light);
}
.policy-separator {
  color: var(--text-muted);
  font-size: 0.75rem;
}
.btn-footer-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--accent-primary);
  color: #1a1512;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
}
.footer-bottom {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}
/* ==========================================================================
   Responsive Engine & Dynamic Navigation Drawer States
   ========================================================================== */
@media (min-width: 640px) {
  .trust-strip-inner {
    flex-direction: row;
    justify-content: space-between;
  }
}
@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .requirements-matrix {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
  }
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .testimonials-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .requirements-matrix {
    grid-template-columns: repeat(4, 1fr);
    padding: 3.5rem 2.5rem;
  }
  .mobile-nav-toggle {
    display: none !important;
  }
  .nav-wrapper {
    display: flex !important;
    position: static;
    background-color: transparent;
    padding: 0;
    border: none;
    box-shadow: none;
  }
}
/* Mobile & Tablet Navigation Overlay Engine (< 1024px) */
@media (max-width: 1023px) {
  .mobile-nav-toggle {
    display: flex;
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
  }
  .nav-wrapper {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: calc(100vh - 100%);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    background-color: var(--bg-dark);
    flex-direction: column;
    align-items: stretch;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.5);
  }
  .nav-wrapper.is-active {
    display: flex !important;
  }
  .nav-menu {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
    width: 100%;
    margin: 1rem 0;
  }
  .nav-menu .nav-link {
    display: flex;
    align-items: center;
    width: 100%;
    min-height: 44px;
  }
  .nav-cta-wrapper {
    width: 100%;
  }
  .nav-cta-wrapper .btn {
    width: 100%;
    min-height: 44px;
  }
}
/* Small-phone refinements (narrow viewports, e.g. 320-380px) */
@media (max-width: 380px) {
  .container {
    padding: 0 1rem;
  }
  .hero-section {
    padding: 3rem 0;
  }
  .hero-actions {
    flex-direction: column;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .checksum-command {
    font-size: 0.7rem;
  }
  .checksum-value {
    font-size: 0.65rem;
  }
  .pricing-card {
    padding: 1.75rem 1.25rem;
  }
}