:root {
    
    --primary-purple: #6600cc;      
    --primary-accent: #9933ff;      
    --accent-green: #4CAF50;        
    --background-dark: #121212;     
    --card-dark: #1e1e1e;           
    --text-light: #f1f1f1;         
    --secondary-text: #aaaaaa;    
    --border-color: #333333;       
    --hover-bg: rgba(153, 51, 255, 0.2); 
    --button-text-color: white;    
    --success-color: var(--accent-green);
    --warning-color: #f59e0b;
    --bg-color: var(--background-dark);
    --surface-color: var(--card-dark); 
}


@keyframes moveDots {
    0% { background-position: 0 0; }
    100% { background-position: 40px 40px; }
}




.loop-animated-heading {
    font-size: 3rem;
    font-weight: 900;
    text-align: center;
    color: #d1b3ff;
    text-shadow: 0 0 5px #6600cc, 0 0 10px #9933ff, 0 0 20px #6600cc;
    animation: neonFlicker 3s infinite;
}

@keyframes neonFlicker {
    0%, 18%, 22%, 25%, 53%, 57%, 100% {
        opacity: 1;
        text-shadow: 0 0 5px #6600cc, 0 0 10px #9933ff, 0 0 20px #00ffff;
    }
    20%, 24%, 55% {
        opacity: 0.6;
        text-shadow: none;
    }
}


.wave-glow {
    font-size: 3rem;
    font-weight: 900;
    text-align: center;
    color: #c8a2ff;
    text-shadow: 0 0 10px #6600cc, 0 0 20px #9933ff;
    display: inline-block;
    animation: waveGlow 4s ease-in-out infinite;
}

@keyframes waveGlow {
    0%   { transform: translateY(0); text-shadow: 0 0 5px #9933ff, 0 0 10px #6600cc; }
    25%  { transform: translateY(-5px); text-shadow: 0 0 15px #00ffff, 0 0 25px #6600cc; }
    50%  { transform: translateY(0); text-shadow: 0 0 5px #9933ff, 0 0 20px #00ffff; }
    75%  { transform: translateY(5px); text-shadow: 0 0 15px #6600cc, 0 0 30px #9933ff; }
    100% { transform: translateY(0); text-shadow: 0 0 10px #9933ff, 0 0 20px #6600cc; }
}


.color-shift-glow {
    font-size: 3rem;
    font-weight: 900;
    text-align: center;
    color: #ffffff;
    text-shadow: 0 0 10px #6600cc, 0 0 20px #00ffff, 0 0 30px #ff00ff;
    animation: colorShift 5s linear infinite;
}

@keyframes colorShift {
    0%   { text-shadow: 0 0 10px #6600cc, 0 0 20px #00ffff, 0 0 30px #ff00ff; }
    33%  { text-shadow: 0 0 10px #00ffff, 0 0 20px #ff00ff, 0 0 30px #6600cc; }
    66%  { text-shadow: 0 0 10px #ff00ff, 0 0 20px #6600cc, 0 0 30px #00ffff; }
    100% { text-shadow: 0 0 10px #6600cc, 0 0 20px #00ffff, 0 0 30px #ff00ff; }
}


a {
    color: var(--text-light); 
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-dark); 
    color: var(--text-light); 
    line-height: 1.6;
    animation: fadeIn 0.8s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Header & Navigation --- */
.header {
    background-color: var(--card-dark); 
    padding: 1rem 5%;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo { 
    font-weight: 700; 
    font-size: 1.5rem; 
    letter-spacing: 1px; 
    color: var(--text-light); 
}

.nav-links { display: flex; list-style: none; gap: 1.5rem; }

.nav-links a { 
    text-decoration: none; 
    color: var(--secondary-text); 
    font-weight: 500; 
    padding: 0.5rem 1rem; 
    border-radius: 8px; 
    transition: background-color 0.3s ease, color 0.3s ease; 
}

.nav-links a:hover { 
    background-color: var(--hover-bg); 
    color: var(--text-light); 
}

/* Active  */
.nav-links .active { 
    background-color: var(--primary-purple); 
    color: var(--text-light) !important; 
    border-radius: 4px;
}

.nav-button-special { 
    background-color: var(--primary-purple); 
    color: var(--button-text-color); 
    font-weight: 600; 
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: filter 0.3s ease;
}

.nav-button-special:hover {
    filter: brightness(1.2);
}

.sign-out { 
    text-decoration: none; 
    color: var(--text-light); 
    font-weight: 500; 
}

/*  Main Content & Index Page Cards*/
.main-content { padding: 2rem 5%; }

.welcome-section h1 { 
    text-align: center; 
    font-size: 1.25rem; 
    color: var(--secondary-text); 
    font-weight: 500; 
    margin-bottom: 2.5rem; 
}

.courses-section h2 { 
    font-size: 1.1rem; 
    font-weight: 600; 
    text-transform: uppercase; 
    letter-spacing: 1px; 
    margin-bottom: 1.5rem; 
    color: var(--secondary-text); 
}

.courses-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); 
    gap: 2rem; 
}

.course-card { 
    background-color:#0f0b25; 
    border-radius: 5px; 
    overflow: hidden; 
    border: 2px solid var(--border-color); 
    transition: transform 0.3s ease, border-color 0.2s ease; 
}
.course-card {
  position: relative;
  overflow: hidden;
  background-color: #0f0b25;
  border-radius: 5px;
  border: 2px solid var(--border-color);
  transition: transform 0.3s ease, border-color 0.2s ease;
}

/* Add animated border on hover */
.course-card {
  position: relative;
  overflow: hidden;
  background-color: #0f0b25;
  border-radius: 5px;
  border: 2px solid var(--border-color);
  transition: transform 0.3s ease, border-color 0.2s ease;
}


.course-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary-accent);
}


.course-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 5px;
  padding: 2px; 
  background: linear-gradient(90deg, rgb(142, 180, 223), transparent, rgb(79, 127, 138), transparent);
  background-size: 300% 300%;
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  z-index: 1;
  animation: borderRun 3s linear infinite;
  transition: opacity 0.3s ease;
}


.course-card:hover::after {
  opacity: 1;
}


.course-card > * {
  position: relative;
  z-index: 2;
}


@keyframes borderRun {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 300% 50%;
  }
}





.card-banner img { 
    filter: brightness(0.9); 
}

.placeholder-banner { 
    height: 150px; 
    background-color: var(--background-dark); 
    background-image: repeating-linear-gradient( 
        -45deg, 
        var(--card-dark), 
        var(--card-dark) 10px, 
        var(--background-dark) 10px, 
        var(--background-dark) 20px 
    ); 
}

.access-badge { 
    background-color: rgba(0, 0, 0, 0.7); 
    color: var(--text-light); 
}

.card-body { padding: 1.5rem; }

.card-body h3 { 
    font-size: 1.25rem; 
    margin-bottom: 0.5rem; 
    color: var(--text-light); 
}

.card-body p { 
    font-size: 0.9rem; 
    color: var(--secondary-text); 
    margin-bottom: 1.5rem; 
    min-height: 45px; 
}

.progress-bar {
  width: 100%; 
  height: 20px;
  background-color: #1a1a1a;
  border-radius: 10px;
  overflow: hidden;
  margin: 10px 0;
  box-shadow: 0 0 5px rgba(0, 255, 0, 0.3);
}

.progress-fill {
  height: 100%;
  width: 15%; 
  background-color: lightgreen; 
  border-radius: 10px 0 0 10px;
  transition: width 0.5s ease-in-out; 
}

 

.btn-continue,
a.btn-continue {
    display: inline-flex;             
    justify-content: center;           
    align-items: center;             
    width: 330px;                      
    height: 45px;                       
    background-color: var(--primary-purple); 
    color: var(--button-text-color);    
    font-size: 1rem;                   
    font-weight: 600;                
    border: none;                       
    border-radius: 5px;              
    text-decoration: none;          
    cursor: pointer;                
    transition: all 0.2s ease;         
}

.btn-continue:hover,
a.btn-continue:hover {
    filter: brightness(1.5);
    transform: translateY(-1px);       
}


.btn-continue:hover, a.btn-continue:hover { 
    filter: brightness(1.2); 
}

/*  Course Details Page Elements  */
.course-header h1 {
    color: var(--text-light);
}

.main-progress-bar {
    background-color: var(--card-dark);
    border: 1px solid var(--border-color);
}

.main-progress-fill {
    background-color: var(--success-color);
}

.topics-section h2, .doubt-section h2 {
    color: var(--text-light);
    border-bottom: 1px solid var(--border-color);
}

.topic-item {
    background-color: var(--card-dark);
    border: 1px solid var(--border-color);
}

.topic-item:hover {
    background-color: #242424;
}

.topic-item.completed { border-left: 4px solid var(--success-color); }
.topic-item.completed .topic-icon { color: var(--success-color); }

.topic-item.in-progress { border-left: 4px solid var(--primary-purple); } 
.topic-item.in-progress .topic-icon { color: var(--primary-purple); }

.topic-item.locked {
    border-left: 4px solid var(--secondary-text);
}

/* Doubt Box Styles */
.doubt-section {
    background-color: var(--card-dark);
    border: 1px solid var(--border-color);
}

.form-group input, .form-group textarea {
    background-color: var(--background-dark);
    border: 1px solid var(--border-color);
    color: var(--text-light);
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--primary-accent);
}

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

/* --- Community Section --- */
.community-section {
  background-color: var(--background-dark); 
  border-top: 1px solid var(--border-color);
}

.community-section h2 {
  color: var(--text-light);
  text-shadow: 0 0 10px var(--primary-accent); 
}

.community-item {
  color: var(--text-light);
}

.community-item img {
 
  filter: drop-shadow(0 0 10px var(--primary-accent)); 
}

.community-item:hover {
  color: var(--primary-accent);
}

/* --- Footer Section --- */
.footer {
  background-color: var(--card-dark);
  border-top: 1px solid var(--border-color);
}

.footer-container {
  color: var(--secondary-text);
}

.footer-logo {
  color: var(--primary-accent);
}

.footer-column h4 {
  color: var(--primary-accent); 
}

.footer-column a {
  color: var(--secondary-text);
}

.footer-column a:hover {
  color: var(--primary-accent);
}

.copyright {
  color: var(--secondary-text);
  border-top: 1px solid var(--border-color);
}

/*  Floating Action Button */
.fab {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--primary-purple);
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
    cursor: pointer;
    z-index: 1000;
}
/* Community Section  */
.community-section {
  text-align: center;
  padding: 4rem 1rem;
  background-color: var(--background-dark); 
  border-top: 1px solid var(--border-color);
  animation: fadeIn 1s ease-in-out;
}

.community-section h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-light);
  margin-bottom: 2rem;
  text-shadow: 0 0 10px var(--primary-accent); 
}

.community-icons {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 5rem;
  flex-wrap: wrap;
}

.community-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--text-light);
  transition: transform 0.3s ease, color 0.3s ease;
}

.community-item img {
  width: 60px;
  height: 60px;
  filter: drop-shadow(0 0 10px var(--primary-accent)); 
  transition: transform 0.3s ease;
}

.community-item a {
  margin-top: 0.75rem;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.5px;
  color: var(--text-light); 
}

.community-item:hover {
  color: var(--primary-accent); 
  transform: scale(1.05);
}
.community-item:hover a {
  color: var(--primary-accent); 
}
.community-item:hover img {
  transform: scale(1.1);
}


/* Footer Section (Dark Theme) */
.footer {
  background-color: var(--card-dark);
  padding: 3rem 2rem;
  border-top: 1px solid var(--border-color);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 2rem;
  color: var(--secondary-text);
  max-width: 1200px;
  margin: 0 auto;
}

.footer-column {
  flex: 1 1 200px;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-accent); 
  margin-bottom: 1rem;
}

.footer-column h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary-accent); 
  margin-bottom: 0.75rem;
}

.footer-column ul {
  list-style: none;
  padding: 0;
}

.footer-column ul li {
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.footer-column a {
  text-decoration: none;
  color: var(--secondary-text);
  transition: color 0.3s ease;
}

.footer-column a:hover {
  color: var(--primary-accent); 
}

.copyright {
  text-align: center;
  margin-top: 2rem;
  font-size: 0.85rem;
  color: var(--secondary-text);
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
  opacity: 0.8;
}

/* Responsive */
@media (max-width: 768px) {
  .footer-container {
    flex-direction: column;
    text-align: center;
  }
  .community-icons {
    gap: 2rem;
  }
}


/* Section Heading Style */
.topics-section {
    margin-top: 3rem;
    padding: 0 5%;
}

.topics-section h2 {
    font-size: 1.25rem;
    color: var(--text-light); 
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color); 
}


.curriculum-list {
    list-style: none;
    padding: 0;
}


.topic-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    background-color: var(--card-dark); 
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 1rem;
    transition: background-color 0.3s;
    cursor: pointer;
}

.topic-item:hover {
    background-color: #242424; 
}

/* Icons */
.topic-icon {
    font-size: 1.2rem;
    margin-right: 1rem;
    width: 20px;
    text-align: center;
}

.topic-title {
    flex-grow: 1; 
    font-weight: 500;
    color: var(--text-light);
}


.topic-status {
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    white-space: nowrap;
}



/*Completed  */
.topic-item.completed { 
    border-left: 4px solid var(--success-color);
}
.topic-item.completed .topic-icon { 
    color: var(--success-color); 
}
.topic-item.completed .topic-status { 
    color: var(--success-color); 
    background-color: rgba(34, 197, 94, 0.1); 
}


.topic-item.in-progress { 
    border-left: 4px solid var(--primary-purple);
}
.topic-item.in-progress .topic-icon { 
    color: var(--primary-purple); 
}
.topic-item.in-progress .topic-status { 
    color: var(--primary-purple); 
    background-color: rgba(153, 51, 255, 0.1); 
}


.topic-item.locked {
    border-left: 4px solid var(--secondary-text); 
    color: var(--secondary-text); 
}
.topic-item.locked .topic-title {
    color: var(--secondary-text);
}
.topic-item.locked .topic-icon { 
    color: var(--secondary-text); 
}
.topic-item.locked .topic-status { 
    color: var(--secondary-text); 
    background-color: rgba(160, 160, 160, 0.1); 
}


.btn-certificate {
    display: block;
    width: 100%;
    max-width: 300px; 
    margin: 2rem auto; 
    padding: 0.8rem 1.5rem;
    background-color: var(--primary-purple); 
    color: var(--button-text-color);
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: filter 0.3s ease, box-shadow 0.3s ease;
}

.btn-certificate:hover {
    filter: brightness(1.1);
    box-shadow: 0 0 10px rgba(153, 51, 255, 0.5);
}