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

:root {
    --brand-blue: #00418E;
    --accent-blue: #2984FF;
    --brand-white: #FFFFFC;
    --brand-black: #1D1C1D;
    --shadow-color: rgba(0, 0, 0, 0.2);
    --transition-speed: 0.3s;
}

body {
    font-family: 'Inter', 'Segoe UI', 'Arial', sans-serif; /* More modern font stack */
    line-height: 1.6;
    background-color: var(--brand-blue);
    color: var(--brand-white);
    min-height: 100vh;
}

/* Disclaimer Banner Styling */
.disclaimer-banner {
    background: linear-gradient(135deg, #FF6B6B, #FFE66D);
    color: var(--brand-black);
    padding: 15px 20px;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    animation: slideDown 0.5s ease-out;
}

.disclaimer-content {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.disclaimer-emoji {
    font-size: 1.5rem;
    animation: bounce 2s infinite;
}

.disclaimer-banner p {
    margin: 0;
    font-size: 1rem;
    line-height: 1.4;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.container {
    max-width: 1100px; /* Slightly wider for modern displays */
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Logo Styling - Significantly Larger */
.logo-container {
    margin: 20px auto 40px;
    display: flex;
    justify-content: center;
    width: 100%;
    height: 200px;
    overflow: hidden;
}

#logo {
    width: 80%;
    max-width: 800px;
    object-fit: cover;
    object-position: center;
}

#logo:hover {
    transform: scale(1.05); /* Subtle hover effect */
}

/* Adjust header to accommodate larger logo */
header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px 0 30px;
    border-bottom: 2px solid var(--accent-blue);
    position: relative;
}

/* Modern decorative element */
header::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 5px;
    background-color: var(--accent-blue);
    border-radius: 10px;
}

h1 {
    font-size: 2.8rem; /* Larger heading */
    color: var(--accent-blue);
    margin-bottom: 15px;
    font-weight: 700; /* Bolder text */
    letter-spacing: -0.5px; /* Tighter letter spacing for modern look */
}

.tagline {
    font-style: italic;
    color: var(--brand-white);
    font-size: 1.1rem; /* Slightly larger */
    opacity: 0.9;
}

/* Chat Area Styling - More modern with subtle gradients and better shadows */
.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: linear-gradient(145deg, rgba(29, 28, 29, 0.95), rgba(29, 28, 29, 0.85));
    border-radius: 12px; /* Larger radius */
    overflow: hidden;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25), 0 5px 10px rgba(0, 0, 0, 0.15); /* Layered shadow for depth */
    border: 1px solid var(--accent-blue);
    transition: box-shadow var(--transition-speed);
}

.chat-container:hover {
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3), 0 8px 15px rgba(0, 0, 0, 0.2);
}

#chat-history {
    flex: 1;
    padding: 25px; /* More padding */
    overflow-y: auto;
    max-height: 65vh;
    scroll-behavior: smooth; /* Smooth scrolling */
}

.message {
    margin-bottom: 18px;
    padding: 14px 18px;
    border-radius: 12px;
    max-width: 80%;
    word-break: break-word;
    animation: fadeIn 0.3s ease-out; /* Fade in messages */
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1); /* Subtle shadow */
    transition: transform var(--transition-speed);
}

.message:hover {
    transform: translateY(-2px); /* Subtle lift on hover */
}

.user-message {
    background: linear-gradient(135deg, var(--accent-blue), #1e70e0);
    margin-left: auto;
    border-bottom-right-radius: 0;
    color: var(--brand-white);
}

.ai-message {
    background: linear-gradient(135deg, var(--brand-blue), #003571);
    margin-right: auto;
    border-bottom-left-radius: 0;
    color: var(--brand-white);
}

.system-message {
    background: rgba(29, 28, 29, 0.7);
    margin: 15px auto;
    text-align: center;
    font-style: italic;
    color: var(--brand-white);
    border: 1px solid var(--accent-blue);
}

/* Input Area - Modern styling */
.input-area {
    display: flex;
    padding: 18px;
    background-color: var(--brand-black);
    border-top: 1px solid var(--accent-blue);
}

#user-input {
    flex: 1;
    padding: 14px 18px;
    border: none;
    border-radius: 8px;
    background-color: rgba(255, 255, 252, 0.95);
    color: var(--brand-black);
    resize: none;
    height: 55px; /* Taller input */
    font-family: inherit;
    font-size: 1rem;
    transition: all var(--transition-speed);
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
}

#user-input:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--accent-blue), inset 0 1px 3px rgba(0, 0, 0, 0.1);
    height: 70px; /* Expand on focus */
}

#send-button {
    margin-left: 12px;
    padding: 0 25px;
    background: linear-gradient(to right, var(--accent-blue), #2063cb);
    color: var(--brand-white);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    transition: all var(--transition-speed);
    text-transform: uppercase; /* Modern text styling */
    letter-spacing: 0.5px;
    font-size: 0.95rem;
}

#send-button:hover {
    background: linear-gradient(to right, #2063cb, var(--accent-blue));
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

#send-button:active {
    transform: translateY(1px);
}

footer {
    text-align: center;
    margin-top: 30px;
    padding: 25px 0;
    color: var(--brand-white);
    font-size: 0.95rem;
    border-top: 1px solid var(--accent-blue);
    opacity: 0.8;
}

/* Typing indicator animation - Modernized */
.typing-indicator {
    display: flex;
    padding: 12px;
    align-items: center;
    justify-content: center;
}

.typing-indicator span {
    height: 10px;
    width: 10px;
    background-color: var(--accent-blue);
    border-radius: 50%;
    margin: 0 3px;
    animation: bounce 1.5s infinite;
    opacity: 0.8;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes bounce {
    0%, 60%, 100% {
        transform: translateY(0);
    }
    30% {
        transform: translateY(-5px);
    }
}

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

/* Responsive improvements */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    h1 {
        font-size: 2.2rem;
    }
    
    .message {
        max-width: 90%;
    }
    
    #logo {
        width: 95%;
        max-width: 500px;
    }
    
    .logo-container {
        min-height: auto;
        margin-bottom: 20px;
    }
    
    /* Disclaimer banner mobile styles */
    .disclaimer-banner {
        padding: 12px 10px;
    }
    
    .disclaimer-content {
        flex-wrap: wrap;
        gap: 10px;
    }
    
    .disclaimer-emoji {
        display: none; /* Hide emojis on small screens to save space */
    }
    
    .disclaimer-banner p {
        font-size: 0.9rem;
    }
}