:root {
  --bg0: #0a0e1a;
  --bg1: #0f1419;
  --glass: rgba(15, 20, 25, 0.75);
  --glass-light: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.08);
  --accent: #00d4ff;
  --accent-light: #66e0ff;
  --text: #f0f4f8;
  --text-muted: #94a3b8;
  --text-secondary: #cbd5e1;
  --card-bg: rgba(20, 25, 35, 0.6);
  --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-dark: linear-gradient(180deg, var(--bg0), var(--bg1));
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--gradient-dark);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Bootstrap utility color overrides for dark custom theme */
.text-muted {
  color: var(--text-muted) !important;
}

.text-secondary {
  color: var(--text-muted) !important;
}

.text-body-secondary {
  color: var(--text-muted) !important;
}

.alert {
  border-color: var(--border) !important;
}

.alert-info {
  background: rgba(13, 202, 240, 0.10) !important;
  color: var(--text) !important;
}

.alert-warning {
  background: rgba(255, 193, 7, 0.12) !important;
  color: var(--text) !important;
}

.alert-success {
  background: rgba(25, 135, 84, 0.12) !important;
  color: var(--text) !important;
}

/* Enhanced text hierarchy and readability */
h1, h2, h3, h4, h5, h6 {
  color: var(--text) !important;
}

.display-6 {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800;
  text-shadow: 0 0 30px rgba(102, 126, 234, 0.3);
  animation: glow 3s ease-in-out infinite alternate;
}

@keyframes glow {
  from { 
    filter: drop-shadow(0 0 20px rgba(102, 126, 234, 0.5));
    transform: translateY(0);
  }
  to { 
    filter: drop-shadow(0 0 40px rgba(240, 147, 251, 0.8));
    transform: translateY(-2px);
  }
}

.lead {
  color: var(--text-secondary) !important;
}

.accordion-button {
  color: var(--text) !important;
}

.accordion-button:not(.collapsed) {
  color: var(--bg0) !important;
}

.accordion-body {
  color: var(--text-secondary) !important;
}

.alert {
  color: var(--text) !important;
}

.alert .alert-heading {
  color: var(--text) !important;
}

/* Links and interactions */
a {
  color: var(--accent) !important;
}

a:hover {
  color: var(--accent-light) !important;
}

.nav-link {
  color: var(--text-muted) !important;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent) !important;
}

.navbar-brand {
  color: var(--accent) !important;
}

.navbar-brand:hover {
  color: var(--accent-light) !important;
}

/* Footer text */
footer .text-white {
  color: var(--text) !important;
}

footer .text-muted {
  color: var(--text-muted) !important;
}

/* Badge text */
.badge {
  color: var(--text) !important;
}

.badge:hover {
  color: var(--bg0) !important;
}

/* Animated background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(245, 87, 108, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

/* Navbar */
.navbar {
  background: var(--glass) !important;
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--accent) !important;
  text-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
  transition: all 0.3s ease;
}

.navbar-brand:hover {
  color: var(--accent-light) !important;
  transform: translateY(-2px);
}

.nav-link {
  color: var(--text) !important;
  font-weight: 500;
  margin: 0 0.5rem;
  border-radius: 8px;
  transition: all 0.3s ease;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 80%;
}

.nav-link:hover {
  color: var(--accent-light) !important;
  background: var(--glass-light);
}

/* Header */
header {
  padding: 5rem 0 3rem;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

header::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

.display-6 {
  font-weight: 800;
  font-size: 2.5rem;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
  animation: glow 3s ease-in-out infinite alternate;
}

@keyframes glow {
  from { filter: drop-shadow(0 0 20px rgba(102, 126, 234, 0.5)); }
  to { filter: drop-shadow(0 0 30px rgba(0, 212, 255, 0.8)); }
}

.lead {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 600px;
}

/* Cards */
.glass-card {
  background: var(--glass) !important;
  border: 1px solid var(--border);
  border-radius: 20px;
  backdrop-filter: blur(20px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
  overflow: hidden;
  position: relative;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  animation: shimmer 3s linear infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.glass-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0, 212, 255, 0.2);
  border-color: var(--accent);
}

/* Quick summary card */
.card.glass-card .card-body {
  padding: 2rem;
}

.card.glass-card .h6 {
  color: var(--accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.8rem;
}

/* Badges */
.badge {
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-weight: 500;
  font-size: 0.85rem;
  background: var(--glass-light) !important;
  border: 1px solid var(--border);
  color: var(--text) !important;
  transition: all 0.3s ease;
}

.badge:hover {
  background: var(--accent) !important;
  color: var(--bg0) !important;
  transform: scale(1.05);
}

/* Accordion */
.accordion-button {
  background: var(--glass-light) !important;
  color: var(--text) !important;
  font-weight: 600;
  border: none;
  padding: 1.2rem 1.5rem;
  transition: all 0.3s ease;
}

.accordion-button:not(.collapsed) {
  background: var(--accent) !important;
  color: var(--bg0) !important;
  box-shadow: none;
}

.accordion-button:focus {
  box-shadow: none;
  border: none;
}

.accordion-button::after {
  filter: brightness(0) invert(1);
  transition: transform 0.3s ease;
}

.accordion-button:not(.collapsed)::after {
  transform: rotate(180deg);
}

.accordion-item {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 12px !important;
  margin-bottom: 1rem;
  overflow: hidden;
}

.accordion-item:first-child {
  border-top-left-radius: 12px;
  border-top-right-radius: 12px;
}

.accordion-item:last-child {
  border-bottom-left-radius: 12px;
  border-bottom-right-radius: 12px;
}

.accordion-body {
  background: var(--glass);
  color: var(--text);
  padding: 1.5rem;
}

/* Section titles */
.h4 {
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--gradient-1);
  border-radius: 2px;
}

/* Lists */
ul {
  padding-left: 1.5rem;
}

ul li {
  margin-bottom: 0.8rem;
  position: relative;
  padding-left: 0.5rem;
}

ul li::before {
  content: '▸';
  position: absolute;
  left: -1rem;
  color: var(--accent);
  font-weight: bold;
}

/* Footer */
footer {
  background: var(--glass);
  border-top: 1px solid var(--border);
  backdrop-filter: blur(20px);
  padding: 2rem 0;
  margin-top: 4rem;
}

footer a {
  color: var(--accent) !important;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
}

footer a:hover {
  color: var(--accent-light) !important;
  text-decoration: underline;
}

/* Logo and Branding */
.navbar-brand img {
  transition: transform 0.3s ease;
  border-radius: 50%;
  object-fit: cover;
}

.navbar-brand:hover img {
  transform: scale(1.05);
}

/* Favicon and icons */
.favicon-round {
  border-radius: 50%;
}

/* Logo responsive sizing */
@media (max-width: 575.98px) {
  .navbar-brand img {
    height: 28px !important;
    width: 28px !important;
  }
}

@media (min-width: 576px) and (max-width: 767.98px) {
  .navbar-brand img {
    height: 30px !important;
    width: 30px !important;
  }
}

@media (min-width: 768px) {
  .navbar-brand img {
    height: 32px !important;
    width: 32px !important;
  }
}

/* Responsive Design */
@media (max-width: 575.98px) {
  .display-6 {
    font-size: 1.75rem;
  }
  
  header {
    padding: 2rem 0 1.5rem;
  }
  
  .lead {
    font-size: 1rem;
  }
  
  .glass-card {
    margin-bottom: 1rem;
  }
  
  .navbar-brand {
    font-size: 1.1rem;
  }
  
  .badge {
    font-size: 0.75rem;
    padding: 0.4rem 0.8rem;
  }
  
  .accordion-button {
    font-size: 0.9rem;
    padding: 1rem;
  }
  
  .accordion-body {
    font-size: 0.9rem;
  }
  
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  
  .card-body {
    padding: 1.5rem !important;
  }
  
  .anchor-offset {
    scroll-margin-top: 80px;
  }
}

@media (min-width: 576px) and (max-width: 767.98px) {
  .display-6 {
    font-size: 2rem;
  }
  
  header {
    padding: 3rem 0 2rem;
  }
  
  .lead {
    font-size: 1.1rem;
  }
  
  .badge {
    font-size: 0.8rem;
  }
  
  .accordion-button {
    font-size: 0.95rem;
  }
  
  .anchor-offset {
    scroll-margin-top: 90px;
  }
}

@media (min-width: 768px) and (max-width: 991.98px) {
  .display-6 {
    font-size: 2.25rem;
  }
  
  header {
    padding: 4rem 0 2.5rem;
  }
  
  .lead {
    font-size: 1.15rem;
  }
  
  .badge {
    font-size: 0.85rem;
  }
  
  .anchor-offset {
    scroll-margin-top: 100px;
  }
}

@media (min-width: 992px) and (max-width: 1199.98px) {
  .display-6 {
    font-size: 2.4rem;
  }
  
  .anchor-offset {
    scroll-margin-top: 100px;
  }
}

@media (min-width: 1200px) {
  .anchor-offset {
    scroll-margin-top: 100px;
  }
}

/* Mobile-specific optimizations */
@media (max-width: 767.98px) {
  /* Navbar mobile improvements */
  .navbar-collapse {
    background: var(--glass);
    backdrop-filter: blur(20px);
    border-radius: 12px;
    margin-top: 0.5rem;
    padding: 1rem;
    border: 1px solid var(--border);
  }
  
  .navbar-nav {
    gap: 0.5rem;
  }
  
  .nav-link {
    padding: 0.5rem 1rem !important;
    border-radius: 8px;
  }
  
  /* Cards mobile optimization */
  .glass-card {
    border-radius: 16px;
  }
  
  .card-body {
    padding: 1.5rem !important;
  }
  
  /* Accordion mobile improvements */
  .accordion-item {
    border-radius: 12px !important;
    margin-bottom: 0.75rem;
  }
  
  .accordion-button {
    border-radius: 12px !important;
  }
  
  /* Footer mobile */
  footer {
    text-align: center;
  }
  
  footer .text-md-end {
    text-align: center !important;
  }
  
  footer .d-flex {
    justify-content: center;
  }
}

/* Tablet-specific optimizations */
@media (min-width: 768px) and (max-width: 991.98px) {
  .glass-card {
    border-radius: 18px;
  }
  
  .card-body {
    padding: 2rem !important;
  }
}

/* Desktop optimizations */
@media (min-width: 1200px) {
  .glass-card {
    border-radius: 20px;
  }
  
  .card-body {
    padding: 2.5rem !important;
  }
}

/* Touch-friendly interactions */
@media (hover: none) and (pointer: coarse) {
  .nav-link:hover,
  .badge:hover,
  a:hover {
    transform: none;
  }
  
  .glass-card:hover {
    transform: translateY(0);
  }
}

/* Ensure proper viewport scaling */
@viewport {
  width: device-width;
  zoom: 1.0;
}