:root {
  /* NASA Color Palette */
  --color-primary: #0b3d91;
  --color-primary-dark: #061f4a;
  --color-primary-light: #105bd8;
  
  /* NASA Blue Variations */
  --color-nasa-blue: #0b3d91;
  --color-nasa-dark-blue: #061f4a;
  --color-nasa-light-blue: #105bd8;
  --color-nasa-accent: #02bfe7;
  
  /* NASA Red/Orange */
  --color-nasa-red: #dd361c;
  --color-nasa-orange: #ff6b35;
  
  /* Base Colors */
  --color-base: #212121;
  --color-white: #ffffff;
  --color-gray-dark: #323a45;
  --color-gray: #5b616b;
  --color-gray-light: #aeb0b5;
  --color-gray-lighter: #d6d7d9;
  --color-gray-lightest: #f1f1f1;
  
  /* Background Colors */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f8f9fa;
  --color-bg-dark: #212121;
  
  /* Typography */
  --font-family-sans: "Source Sans Pro", "Helvetica Neue", "Helvetica", "Arial", sans-serif;
  --font-family-serif: "Merriweather", "Georgia", "Cambria", "Times New Roman", serif;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
}

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

html {
    font-size: 16px;
}

body {
    font-family: var(--font-family-sans);
    color: var(--color-base);
    background-color: var(--color-bg-primary);
    width: 100%;
    overflow-x: hidden;
}

main {
    width: 100%;
}

.container {
    width: 100%;
    max-width: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-sans);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 3rem;
}

h2 {
    font-size: 2.25rem;
}

h3 {
    font-size: 1.75rem;
}

p {
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

/* Welcome Section with Scrolling Effect */
.welcome {
    position: relative;
    height: 100vh;
    background: linear-gradient(135deg, var(--color-nasa-dark-blue) 0%, var(--color-nasa-blue) 50%, var(--color-nasa-light-blue) 100%);
    background: var(--color-bg-primary);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.welcome::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="40" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="40" cy="80" r="1" fill="rgba(255,255,255,0.1)"/></svg>');
    animation: starfield 20s linear infinite;
    z-index: 1;
}

@keyframes starfield {
    0% { transform: translateY(0); }
    100% { transform: translateY(-100px); }
}

.welcome-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: var(--spacing-2xl);
}

.welcome h1 {
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(45deg, var(--color-nasa-blue), var(--color-nasa-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: glow 3s ease-in-out infinite alternate;
}

@keyframes glow {
    from { filter: drop-shadow(0 0 20px rgba(2, 191, 231, 0.5)); }
    to { filter: drop-shadow(0 0 30px rgba(2, 191, 231, 0.8)); }
}

.welcome p {
    font-size: 1.5rem;
    font-weight: 300;
    opacity: 0.9;
    animation: fadeInUp 1s ease-out 0.5s both;
    color:var(--color-nasa-blue)
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 0.9;
        transform: translateY(0);
    }
}

.welcome-scroll-indicator {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

.welcome-scroll-indicator::after {
    content: '▼';
    font-size: 2rem;
    color: var(--color-nasa-accent);
}

/* Immersive Sections */
.immersive-iframe {
    border: none;
    width: 100%;
    height: 600px;
    display: block;
    border-radius: 10px;
    /*border: 5px solid var(--color-gray-lightest);*/
}

/* Agent Section (Chatbot) */
.agent {
    color: var(--color-base);
    padding: var(--spacing-3xl) 0;
    text-align: center;
    background: var(--color-nasa-blue);
    color:var(--color-bg-primary)

}

.agent h2 {
    color: var(--color-white);
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
    font-weight: 700;
}

.agent p {
    font-size: 1.25rem;
    color: var(--color-bg-primary);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Chatbot Container */
.chatbot-container {
    margin: 0 auto;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;

}

.chatbot-avatar {
    width: 15%;
    height: 15%;
    border-radius: 50%;
    margin: 0 auto var(--spacing-xl);
    border: 4px solid var(--color-nasa-red); 
    box-shadow: 0 4px 20px rgba(2, 191, 231, 0.3);
    transition: all 0.3s ease;
}

.chatbot-avatar:hover {
    transform: scale(1.05);
}

.chatbot-avatar.speaking {
    animation: speaking 0.6s ease-in-out infinite alternate;
    box-shadow: 0 6px 25px rgba(2, 191, 231, 0.5);
}

@keyframes speaking {
    0% { 
        transform: scale(1) rotate(-2deg);
        filter: brightness(1.1);
    }
    100% { 
        transform: scale(1.05) rotate(2deg);
        filter: brightness(1.2);
    }
}

.chatbot-avatar.listening {
    animation: listening 1s ease-in-out infinite;
    border-color: var(--color-nasa-red);
    box-shadow: 0 4px 20px rgba(221, 54, 28, 0.4);
}

@keyframes listening {
    0%, 100% { 
        transform: scale(1);
        opacity: 1;
    }
    50% { 
        transform: scale(1.02);
        opacity: 0.8;
    }
}

.chatbot-input-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    align-items: flex-end;
    width: 100%;
}

/* Voice Transcription Container */
.voice-transcription-container {
    background: var(--color-nasa-red);
    border-radius: 12px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border: 2px solid var(--color-nasa-red);
    width: 50%;
}

.transcription-text {
    margin-bottom: var(--spacing-md);
}

.transcription-text p {
    font-size: 1.1rem;
    color: var(--color-gray-dark);
    margin: 0;
    padding: var(--spacing-md);
    background: var(--color-white);
    border-radius: 8px;
    border-left: 4px solid var(--color-nasa-accent);
    min-height: 60px;
    display: flex;
    align-items: center;
}

.transcription-text.listening p {
    animation: listening-text 1.5s ease-in-out infinite;
    color: var(--color-nasa-red);
}

@keyframes listening-text {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.transcription-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

.chatbot-button.confirm-voice {
    background: var(--color-nasa-blue);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 140px;
}

.chatbot-button.confirm-voice:hover {
    background: var(--color-nasa-dark-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(11, 61, 145, 0.3);
}

.chatbot-button.cancel-voice {
    background: var(--color-gray);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 100px;
}

.chatbot-button.cancel-voice:hover {
    background: var(--color-gray-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(50, 58, 69, 0.3);
}

.chatbot-input {
    flex: 1;
    padding: var(--spacing-md);
    border: 2px solid var(--color-gray-lightest);
    border-radius: 12px;
    font-size: 1rem;
    font-family: var(--font-family-sans);
    resize: vertical;
    min-height: 60px;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.chatbot-input:focus {
    outline: none;
    border-color: var(--color-nasa-accent);
    box-shadow: 0 0 0 3px rgba(2, 191, 231, 0.1);
}

.chatbot-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    align-items: center;
}

.chatbot-button {
    background: var(--color-nasa-blue);
    color: var(--color-white);
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 120px;
}

.chatbot-button:hover {
    background: var(--color-nasa-dark-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(11, 61, 145, 0.3);
}

#send-button{
    background: var(--color-nasa-dark-blue);
    color: var(--color-white);
}

.chatbot-button.microphone {
    background: var(--color-nasa-red);
    min-width: auto;
    border-radius: 10%;
    font-size: 1.4rem;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(221, 54, 28, 0.3);
}

.chatbot-button.microphone:hover {
    background: #c62d1f;
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(221, 54, 28, 0.4);
}

.chatbot-button.microphone.recording {
    background: #ff4444;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.chatbot-button.chat-toggle {
    background: var(--color-nasa-accent);
    min-width: auto;
    border-radius: 10%;
    font-size: 1.2rem;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.chatbot-button.chat-toggle:hover {
    background: #00a6d2;
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(2, 191, 231, 0.3);
}

.chatbot-button.chat-toggle.active {
    background: var(--color-gray-dark);
    transform: rotate(180deg);
}

.chatbot-response {
    background: var(--color-gray-lightest);
    padding: var(--spacing-lg);
    border-radius: 12px;
    margin-top: var(--spacing-lg);
    min-height: 60px;
    border-left: 4px solid var(--color-nasa-accent);
    font-style: italic;
    color: var(--color-gray-dark);
}

/* Metaverse Section */
.metaverse {
    background: var(--color-nasa-blue) ;
    color: var(--color-white);
    text-align: center;
    width: 100%;
    padding: var(--spacing-2xl);

}

.metaverse h2 {
    font-size: 2.25rem;
    margin-bottom: var(--spacing-lg);
    font-weight: 700;
}

.metaverse p {
    font-size: 1.25rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}


/* Footer */
footer {
    background: linear-gradient(135deg, var(--color-nasa-dark-blue) 0%, var(--color-base) 100%);
    color: var(--color-white);
    padding: var(--spacing-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
    width: 100%;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="10" cy="10" r="0.5" fill="rgba(2,191,231,0.3)"/><circle cx="90" cy="30" r="0.5" fill="rgba(2,191,231,0.3)"/><circle cx="30" cy="90" r="0.5" fill="rgba(2,191,231,0.3)"/></svg>');
    opacity: 0.5;
    z-index: 1;
}

footer h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xl);
    color: var(--color-nasa-accent);
    position: relative;
    z-index: 2;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: var(--spacing-md);
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.team-member {
    padding: var(--spacing-sm);
    border-radius: 12px;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.team-member:hover {
    background: var(--color-nasa-red);
    transform: translateY(-5px);;
}

.team-member a {
    color: var(--color-white);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: color 0.3s ease;
}

.team-member a:hover {
    color: var(--color-nasa-accent);
    text-shadow: 0 0 10px rgba(2, 191, 231, 0.5);
}

/* Responsive Design */
@media (max-width: 768px) {
    .welcome h1 {
        font-size: 3rem;
    }
    
    .welcome p {
        font-size: 1.25rem;
    }
    
    .agent h1 {
        font-size: 2rem;
    }
    
    .metaverse h2 {
        font-size: 1.75rem;
    }
    
    /* Mobile Footer Improvements */
    footer {
        padding: var(--spacing-2xl) var(--spacing-md);
    }
    
    footer h2 {
        font-size: 1.75rem;
        margin-bottom: var(--spacing-lg);
    }
    
    .team-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        max-width: 300px;
        margin: 0 auto;
    }
    
    .team-member {
        padding: var(--spacing-md);
        text-align: center;
        border-radius: 16px;
        margin-bottom: var(--spacing-sm);
    }
    
    .team-member a {
        font-size: 1rem;
        padding: var(--spacing-sm);
        display: block;
        border-radius: 12px;
        transition: all 0.3s ease;
    }
    
    .team-member a:hover {
        background: rgba(2, 191, 231, 0.1);
        transform: none;
    }
    
    /* Metaverse Mobile Fullscreen */
    .metaverse {
        padding: var(--spacing-lg) 0;
        position: relative;
    }
    
    .metaverse .immersive-iframe {
        height: 90vh;
        min-height: 600px;
        border-radius: 0;
        position: relative;
        z-index: 1;

    }
    
    .chatbot-input-container {
        align-items: center;
        gap: var(--spacing-md);
        display: flex;
        flex-direction: column;
    }
    .chatbot-response-message {
        color:#d6d7d9;
        font-style: italic;
        background-color: transparent;
        border: 2px solid #d6d7d9;
        width: 100%;
        text-align: left;

    }
 
    
    .chatbot-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .transcription-buttons {
        align-items: center;
        gap: var(--spacing-md);
    }

    
    
    .chatbot-button.confirm-voice,
    .chatbot-button.cancel-voice {
        min-width: 120px;
        width: 100%;
    }

    .chatbot-avatar {
        width: 40%;
        height: 40%;
    }
}

/* Extra small mobile devices */
@media (max-width: 480px) {
    .welcome h1 {
        font-size: 3rem;
    }
    
    .welcome p {
        font-size: 1rem;
    }
    
    .agent h1 {
        font-size: 1.75rem;
    }
    
    .metaverse h2 {
        font-size: 1.5rem;
    }
    
    footer {
        padding: var(--spacing-xl) var(--spacing-sm);
    }
    
    footer h2 {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-md);
    }
    
    .team-grid {
        max-width: 280px;
        gap: var(--spacing-sm);
    }
    
    .team-member {
        padding: var(--spacing-sm);
    }
    
    .team-member a {
        font-size: 0.9rem;
        padding: var(--spacing-xs);
    }
    
    .metaverse .immersive-iframe {
        min-height: 500px;
    }
    
    .chatbot-avatar {
        width: 50%;
        height: 50%;
    }
    
    .voice-transcription-container {
        width: 90%;
        padding: var(--spacing-md);
    }
    
    .transcription-text p {
        font-size: 1rem;
        min-height: 50px;
        padding: var(--spacing-sm);
    }

    .agent h2 {
        margin: var(spacing-md) 0;
    }

    .agent p{
        padding: 20px;
    }
    



}