:root {
    --primary-color: #0a192f;
    --secondary-color: #64ffda;
    --accent-color: #8892b0;
    --background-gradient: linear-gradient(135deg, #0a192f, #172a45);
    --button-gradient: linear-gradient(135deg, #64ffda, #00b4d8);
    --neon-glow: 0 0 15px rgba(100, 255, 218, 0.5), 0 0 30px rgba(100, 255, 218, 0.3);
    --border-radius: 16px;
    --transition: all 0.4s cubic-bezier(0.645, 0.045, 0.355, 1);
    --font-family: 'Orbitron', sans-serif;
    --font-secondary: 'Space Grotesk', sans-serif;
}

body {
    font-family: var(--font-secondary);
    background: var(--background-gradient);
    color: #ccd6f6;
    min-height: 100vh;
    position: relative;
}

header {
    padding: 4em 0;
    background: transparent;
    position: relative;
    text-align: center;
    max-width: 1200px;
    margin: 0 auto;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(100, 255, 218, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(0, 180, 216, 0.1) 0%, transparent 50%);
    animation: headerGlow 10s ease-in-out infinite alternate;
}

header h1 {
    font-family: var(--font-family);
    font-size: 5rem;
    background: linear-gradient(45deg, var(--secondary-color), #00b4d8);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: none;
    margin-bottom: 0.25em;
    letter-spacing: -0.02em;
}

/* Tagline styles */
.tagline {
    font-size: 1.4rem;
    color: var(--accent-color);
    margin-bottom: 2em;
    font-family: var(--font-secondary);
}

/* Search container styles */
.search-container {
    display: flex;
    align-items: center;
    gap: 1rem;
    max-width: 900px;
    margin: 2rem auto;
    padding: 1.5rem;
    position: relative;
    z-index: 1;
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    border: 1px solid rgba(100, 255, 218, 0.1);
}

/* Search input styles */
#search-input {
    flex: 1;
    padding: 1.2rem 1.8rem;
    font-size: 1.2rem;
    border-radius: var(--border-radius);
    margin-bottom: 0;
    background: rgba(255, 255, 255, 0.07);
    border: 2px solid rgba(100, 255, 218, 0.1);
    color: #ffffff;
    transition: var(--transition);
}

#search-input:focus {
    outline: none;
    border-color: #0066cc;
    box-shadow: 0 0 5px rgba(0,102,204,0.3);
}

#search-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

#search-button {
    position: relative;
    overflow: hidden;
    z-index: 1;
}

#search-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 200%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition);
    z-index: -1;
}

#search-button:hover::before {
    left: 100%;
}

#results-section {
    max-width: 900px;
    margin: 3em auto;
    padding: 2em;
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(100, 255, 218, 0.1);
    border-radius: var(--border-radius);
    transform: translateY(0);
    transition: var(--transition);
}

#results-section:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(100, 255, 218, 0.1);
}

.example-queries ul {
    list-style: none;
    padding: 0;
}

.example-queries li {
    margin: 1em 0;
    padding: 1em;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.example-queries li:hover {
    background: rgba(100, 255, 218, 0.1);
    transform: translateX(10px);
}

/* Explain button styles */
#explain-button {
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
    background: var(--button-gradient);
    color: var(--primary-color);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    white-space: nowrap;
}

#explain-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--neon-glow);
}

/* Response container styles */
#response-container {
    margin-top: 2rem;
    padding: 1rem;
    border-radius: 8px;
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: none; /* Hide the white box if it's empty */
}

/* Welcome message styles */
.welcome-message {
    text-align: center;
    margin-bottom: 3em;
}

.welcome-message h2 {
    font-family: var(--font-family);
    font-size: 2rem;
    margin-bottom: 1em;
    background: linear-gradient(45deg, var(--secondary-color), #00b4d8);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Search tip styles */
.search-tip {
    text-align: center;
    color: var(--accent-color);
    font-size: 1.1rem;
    margin-top: 1rem;
}

/* Dark mode considerations */
@media (prefers-color-scheme: dark) {
    #search-input {
        background-color: #333;
        color: #fff;
        border-color: #444;
    }
    
    #response-container {
        background-color: #222;
        color: #fff;
    }
}

@keyframes headerGlow {
    0% {
        opacity: 0.5;
        transform: scale(1);
    }
    100% {
        opacity: 1;
        transform: scale(1.1);
    }
}

footer {
    text-align: center;
    padding: 2em 0;
    background: transparent;
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(100, 255, 218, 0.1);
}