/* ============================================
   LOGOS Research Technologies - Static Site
   ============================================ */

/* Reset and Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Professional Blue/Grey Theme */
  --background: hsl(210, 20%, 98%);
  --foreground: hsl(222, 47%, 11%);
  --card: hsl(0, 0%, 100%);
  --card-foreground: hsl(222, 47%, 11%);
  --primary: hsl(221, 83%, 53%);
  --primary-foreground: hsl(0, 0%, 100%);
  --secondary: hsl(214, 32%, 91%);
  --secondary-foreground: hsl(222, 47%, 11%);
  --muted: hsl(210, 40%, 96%);
  --muted-foreground: hsl(215, 16%, 47%);
  --accent: hsl(217, 91%, 60%);
  --accent-foreground: hsl(0, 0%, 100%);
  --destructive: hsl(0, 84%, 60%);
  --border: hsl(214, 32%, 91%);
  --radius: 0.5rem;
  --hero-gradient: linear-gradient(135deg, hsl(221, 83%, 53%) 0%, hsl(217, 91%, 60%) 50%, hsl(199, 89%, 48%) 100%);
  --card-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --card-shadow-hover: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--background);
  color: var(--foreground);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex-grow: 1;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.3;
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  max-width: 100%;
  height: auto;
}

ul {
  list-style: none;
}

/* ============================================
   Layout Utilities
   ============================================ */
.section-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 640px) {
  .section-container {
    padding: 0 1.5rem;
  }
}

@media (min-width: 1024px) {
  .section-container {
    padding: 0 2rem;
  }
}

.page-section {
  padding: 4rem 0;
}

@media (min-width: 1024px) {
  .page-section {
    padding: 6rem 0;
  }
}

/* ============================================
   Header
   ============================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-image {
  height: 3rem;
  width: auto;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--foreground);
  line-height: 1.2;
}

.logo-subtitle {
  font-size: 0.75rem;
  color: var(--muted-foreground);
  line-height: 1.2;
}

/* Desktop Navigation */
.nav-desktop {
  display: none;
  align-items: center;
  gap: 0.25rem;
}

@media (min-width: 768px) {
  .nav-desktop {
    display: flex;
  }
}

.nav-link {
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted-foreground);
  transition: all 0.2s;
}

.nav-link:hover {
  color: var(--foreground);
  background-color: var(--muted);
}

.nav-link.active {
  background-color: var(--primary);
  color: var(--primary-foreground);
}

/* Mobile Menu */
.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border: none;
  background: none;
  cursor: pointer;
  border-radius: var(--radius);
  color: var(--foreground);
}

.mobile-menu-btn:hover {
  background-color: var(--muted);
}

@media (min-width: 768px) {
  .mobile-menu-btn {
    display: none;
  }
}

.nav-mobile {
  display: none;
  padding: 1rem 0;
  border-top: 1px solid var(--border);
}

.nav-mobile.open {
  display: block;
}

@media (min-width: 768px) {
  .nav-mobile {
    display: none !important;
  }
}

.nav-mobile-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--primary-foreground);
}

.btn-primary:hover {
  background-color: hsl(221, 83%, 45%);
}

.btn-secondary {
  background-color: var(--secondary);
  color: var(--secondary-foreground);
}

.btn-secondary:hover {
  background-color: hsl(214, 32%, 85%);
}

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--border);
  color: var(--foreground);
}

.btn-outline:hover {
  background-color: var(--muted);
}

.btn-outline-light {
  background-color: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: var(--primary-foreground);
}

.btn-outline-light:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

/* ============================================
   Hero Section
   ============================================ */
.hero-gradient {
  background: var(--hero-gradient);
}

.hero {
  padding: 5rem 0 6rem;
}

@media (min-width: 1024px) {
  .hero {
    padding: 7rem 0 8rem;
  }
}

.hero-content {
  max-width: 48rem;
  margin: 0 auto;
  text-align: center;
  color: var(--primary-foreground);
}

.hero-title {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

@media (min-width: 1024px) {
  .hero-title {
    font-size: 3rem;
  }
}

.hero-description {
  font-size: 1.125rem;
  opacity: 0.9;
  margin-bottom: 2rem;
}

@media (min-width: 1024px) {
  .hero-description {
    font-size: 1.25rem;
  }
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

/* Page Hero (smaller) */
.page-hero {
  padding: 4rem 0;
}

@media (min-width: 1024px) {
  .page-hero {
    padding: 5rem 0;
  }
}

.page-hero-title {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

@media (min-width: 1024px) {
  .page-hero-title {
    font-size: 3rem;
  }
}

/* ============================================
   Stats Section
   ============================================ */
.stats-section {
  padding: 2rem 0;
  background-color: var(--card);
  border-bottom: 1px solid var(--border);
}

.stats-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
}

@media (min-width: 1024px) {
  .stats-container {
    gap: 4rem;
  }
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--foreground);
}

.stat-icon {
  color: var(--primary);
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

/* ============================================
   Cards
   ============================================ */
.card {
  background-color: var(--card);
  border-radius: 0.75rem;
  padding: 1.5rem;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border);
  transition: box-shadow 0.2s, transform 0.2s;
}

.card:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-2px);
}

.card-icon {
  width: 4rem;
  height: 4rem;
  border-radius: 0.5rem;
  background: var(--hero-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: var(--primary-foreground);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--foreground);
  margin-bottom: 0.75rem;
}

.card-description {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin-bottom: 1rem;
}

.card-features {
  margin-bottom: 1.5rem;
}

.card-feature {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin-bottom: 0.5rem;
}

.card-feature svg {
  color: var(--primary);
  flex-shrink: 0;
}

/* ============================================
   Grid Layouts
   ============================================ */
.grid-3 {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.grid-2 {
  display: grid;
  gap: 3rem;
}

@media (min-width: 1024px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
    align-items: center;
  }
}

/* ============================================
   Section Titles
   ============================================ */
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--foreground);
  margin-bottom: 1rem;
}

@media (min-width: 1024px) {
  .section-title {
    font-size: 2.25rem;
  }
}

.section-description {
  color: var(--muted-foreground);
  max-width: 42rem;
  margin: 0 auto;
}

/* ============================================
   Feature Lists
   ============================================ */
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.feature-icon {
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 0.25rem;
}

.feature-content h4 {
  font-weight: 600;
  color: var(--foreground);
  margin-bottom: 0.25rem;
}

.feature-content p {
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

/* ============================================
   Info Box
   ============================================ */
.info-box {
  background-color: var(--muted);
  border-radius: 0.75rem;
  padding: 1.5rem;
}

@media (min-width: 1024px) {
  .info-box {
    padding: 2rem;
  }
}

.info-box-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--foreground);
  margin-bottom: 1rem;
}

.info-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.info-list-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

.info-list-item svg {
  color: var(--primary);
  flex-shrink: 0;
}

/* ============================================
   CTA Section
   ============================================ */
.cta-card {
  background-color: var(--card);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border);
  text-align: center;
}

@media (min-width: 1024px) {
  .cta-card {
    padding: 3rem;
  }
}

.cta-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--foreground);
  margin-bottom: 1rem;
}

@media (min-width: 1024px) {
  .cta-title {
    font-size: 1.875rem;
  }
}

.cta-description {
  color: var(--muted-foreground);
  margin-bottom: 2rem;
  max-width: 42rem;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

/* ============================================
   Why Choose Us
   ============================================ */
.why-us-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.why-us-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.why-us-item svg {
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 0.125rem;
}

/* ============================================
   Forms
   ============================================ */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--foreground);
  margin-bottom: 0.25rem;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  background-color: var(--card);
  color: var(--foreground);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--muted-foreground);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-row {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .form-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================
   Contact Info
   ============================================ */
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.contact-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.5rem;
  background-color: rgba(59, 130, 246, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--primary);
}

.contact-label {
  font-weight: 500;
  color: var(--foreground);
}

.contact-value {
  color: var(--muted-foreground);
  transition: color 0.2s;
}

.contact-value:hover {
  color: var(--primary);
}

/* ============================================
   Certificate Verification
   ============================================ */
.verify-result {
  margin-top: 2rem;
}

.verify-success {
  border: 2px solid rgba(59, 130, 246, 0.2);
}

.verify-error {
  border: 2px solid rgba(239, 68, 68, 0.2);
}

.verify-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.verify-icon {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.verify-icon-success {
  background-color: rgba(59, 130, 246, 0.1);
  color: var(--primary);
}

.verify-icon-error {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--destructive);
}

.verify-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--foreground);
}

.verify-subtitle {
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

.cert-details {
  background-color: var(--muted);
  border-radius: 0.5rem;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.cert-detail-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.cert-detail-item svg {
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 0.125rem;
}

.cert-detail-label {
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

.cert-detail-value {
  font-weight: 600;
  color: var(--foreground);
}

/* ============================================
   Materials Grid
   ============================================ */
.materials-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.material-item {
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.75rem;
}

.material-name {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--foreground);
}

.material-desc {
  font-size: 0.75rem;
  color: var(--muted-foreground);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background-color: var(--foreground);
  color: var(--primary-foreground);
  padding: 3rem 0;
}

.footer-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.footer-logo-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.5rem;
  background-color: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer-description {
  font-size: 0.875rem;
  opacity: 0.8;
  margin-bottom: 1rem;
  max-width: 24rem;
}

.footer-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 9999px;
  font-size: 0.75rem;
}

.footer-title {
  font-weight: 600;
  margin-bottom: 1rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-link {
  font-size: 0.875rem;
  opacity: 0.8;
  transition: opacity 0.2s;
}

.footer-link:hover {
  opacity: 1;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.875rem;
  opacity: 0.8;
  margin-bottom: 0.75rem;
}

.footer-contact-item svg {
  flex-shrink: 0;
  margin-top: 0.125rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  margin-top: 2rem;
  padding-top: 2rem;
  text-align: center;
  font-size: 0.875rem;
  opacity: 0.6;
}

/* ============================================
   Toast Notifications
   ============================================ */
.toast-container {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  z-index: 100;
}

.toast {
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--card-shadow-hover);
  max-width: 20rem;
  animation: slideIn 0.3s ease;
}

.toast-success {
  border-left: 4px solid var(--primary);
}

.toast-error {
  border-left: 4px solid var(--destructive);
}

.toast-title {
  font-weight: 600;
  color: var(--foreground);
  margin-bottom: 0.25rem;
}

.toast-message {
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* ============================================
   Background Variants
   ============================================ */
.bg-muted {
  background-color: var(--muted);
}

.bg-card {
  background-color: var(--card);
}

/* ============================================
   Utilities
   ============================================ */
.text-center {
  text-align: center;
}

.text-primary {
  color: var(--primary);
}

.text-muted {
  color: var(--muted-foreground);
}

.mb-4 {
  margin-bottom: 1rem;
}

.mb-6 {
  margin-bottom: 1.5rem;
}

.mb-8 {
  margin-bottom: 2rem;
}

.hidden {
  display: none;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* SVG Icons */
.icon {
  width: 1.25rem;
  height: 1.25rem;
}

.icon-sm {
  width: 1rem;
  height: 1rem;
}

.icon-lg {
  width: 1.5rem;
  height: 1.5rem;
}

.icon-xl {
  width: 1.75rem;
  height: 1.75rem;
}