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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #0a0a0a;
    /* Placeholder for background image */
    background-image: url('background.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
}

/* Dark overlay for better text readability */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(10, 10, 10, 0.9) 0%, rgba(20, 20, 30, 0.85) 100%);
    z-index: -1;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.login-container {
    background: linear-gradient(135deg, rgba(20, 25, 45, 0.95) 0%, rgba(15, 20, 35, 0.9) 100%);
    border: 2px solid rgba(255, 215, 0, 0.4);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6),
                0 0 30px rgba(255, 215, 0, 0.2),
                inset 0 1px 0 rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    text-align: center;
    max-width: 500px;
    margin: 0 auto;
    position: relative;
}

.login-container::before {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    background: linear-gradient(45deg, #0e0c0c 0%, #351010 50%, #572324 100%);
    border-radius: 23px;
    z-index: -1;
    opacity: 0.4;
    animation: borderGlow 3s ease-in-out infinite alternate;
}

@keyframes borderGlow {
    0% { opacity: 0.3; }
    100% { opacity: 0.6; }
}

.chat-container {
    background: rgba(15, 15, 25, 0.95);
    border: 1px solid rgba(0, 255, 255, 0.3);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5),
                0 0 20px rgba(0, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    height: 80vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-header {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #00ffff;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: 20px 20px 0 0;
    border-bottom: 1px solid rgba(0, 255, 255, 0.3);
    position: relative;
}

.chat-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, #00ffff, transparent);
}

.user-info {
    flex-grow: 1;
}

.user-info h2 {
    margin: 0;
    font-size: 1.5em;
    color: #ffffff;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
}

.user-info p {
    margin: 5px 0 0 0;
    opacity: 0.8;
    font-size: 0.9em;
    color: #00ffff;
}

.header-buttons {
    display: flex;
    gap: 10px;
}

.btn {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #00ffff;
    border: 1px solid rgba(0, 255, 255, 0.5);
    padding: 12px 24px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3),
                0 0 20px rgba(0, 255, 255, 0.3);
    border-color: #00ffff;
    color: #ffffff;
}

.btn:active {
    transform: translateY(0);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
    color: #ffffff;
}

.btn-danger {
    background: linear-gradient(135deg, #2e1a1a 0%, #3e1616 50%, #600f0f 100%);
    border-color: rgba(255, 80, 80, 0.5);
    color: #ff5050;
}

.btn-danger:hover {
    border-color: #ff5050;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3),
                0 0 20px rgba(255, 80, 80, 0.3);
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #ffd700;
    text-shadow: 0 0 8px rgba(255, 215, 0, 0.4);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 15px;
    border: 2px solid rgba(255, 215, 0, 0.4);
    border-radius: 10px;
    font-size: 16px;
    background: rgba(20, 25, 45, 0.8);
    color: #ffffff;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #ffd700;
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.4);
    background: rgba(20, 25, 45, 0.9);
}

.form-group input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-group select option {
    background: #1a1f35;
    color: #ffffff;
}

.messages {
    flex-grow: 1;
    padding: 20px;
    overflow-y: auto;
    background: rgba(5, 5, 15, 0.7);
}

.message {
    margin-bottom: 20px;
    padding: 15px;
    border-radius: 15px;
    max-width: 80%;
    animation: slideIn 0.3s ease;
    position: relative;
}

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

.message.user {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #ffffff;
    margin-left: auto;
    border-bottom-right-radius: 5px;
    border: 1px solid rgba(0, 255, 255, 0.3);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.message.bot {
    background: rgba(10, 10, 20, 0.9);
    border: 1px solid rgba(0, 255, 255, 0.2);
    border-bottom-left-radius: 5px;
    color: #ffffff;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.message.error {
    background: linear-gradient(135deg, #2e1a1a 0%, #3e1616 50%, #600f0f 100%);
    color: #ff5050;
    border: 1px solid rgba(255, 80, 80, 0.3);
    border-bottom-left-radius: 5px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.message-content {
    margin-bottom: 10px;
}

.message-meta {
    font-size: 0.8em;
    opacity: 0.7;
    margin-top: 10px;
    color: #00ffff;
}

.sql-query {
    background: rgba(0, 0, 0, 0.5);
    padding: 10px;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    margin: 10px 0;
    white-space: pre-wrap;
    border: 1px solid rgba(0, 255, 255, 0.2);
    color: #00ff80;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 10px 0;
    font-size: 0.9em;
    background: rgba(10, 10, 20, 0.8);
    border-radius: 8px;
    overflow: hidden;
}

.data-table th,
.data-table td {
    border: 1px solid rgba(0, 255, 255, 0.2);
    padding: 8px;
    text-align: left;
    color: #ffffff;
}

.data-table th {
    background: rgba(0, 255, 255, 0.1);
    font-weight: bold;
    color: #00ffff;
}

.data-table tr:nth-child(even) {
    background: rgba(0, 255, 255, 0.05);
}

.input-container {
    padding: 20px;
    background: rgba(10, 10, 20, 0.9);
    border-top: 1px solid rgba(0, 255, 255, 0.3);
    display: flex;
    gap: 10px;
    align-items: center;
}

.question-input {
    flex-grow: 1;
    padding: 15px;
    border: 2px solid rgba(0, 255, 255, 0.3);
    border-radius: 25px;
    font-size: 16px;
    outline: none;
    transition: all 0.3s ease;
    background: rgba(10, 10, 20, 0.8);
    color: #ffffff;
}

.question-input:focus {
    border-color: #00ffff;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.3);
}

.question-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.send-btn {
    padding: 15px 20px;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    border: 2px solid #00ffff;
    color: #00ffff;
    font-size: 18px;
    font-weight: bold;
}

.send-btn:hover {
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
    transform: scale(1.05);
}

.loading {
    display: none;
    text-align: center;
    padding: 20px;
    color: #00ffff;
}

.spinner {
    border: 4px solid rgba(0, 255, 255, 0.2);
    border-top: 4px solid #00ffff;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.hidden {
    display: none !important;
}

.history-panel {
    position: fixed;
    top: 0;
    right: -400px;
    width: 400px;
    height: 100vh;
    background: rgba(10, 10, 20, 0.95);
    border-left: 1px solid rgba(0, 255, 255, 0.3);
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.5);
    transition: right 0.3s ease;
    z-index: 1000;
    overflow-y: auto;
    backdrop-filter: blur(20px);
}

.history-panel.open {
    right: 0;
}

.history-header {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #00ffff;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(0, 255, 255, 0.3);
}

.history-content {
    padding: 20px;
    color: #ffffff;
}

.history-item {
    border-bottom: 1px solid rgba(0, 255, 255, 0.2);
    padding: 15px 0;
}

.history-question {
    font-weight: bold;
    margin-bottom: 5px;
    color: #00ffff;
}

.history-answer {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9em;
}

.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #00ffff;
    padding: 15px 20px;
    border-radius: 10px;
    border: 1px solid rgba(0, 255, 255, 0.3);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5),
                0 0 20px rgba(0, 255, 255, 0.2);
    z-index: 2000;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s ease;
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast.error {
    background: linear-gradient(135deg, #2e1a1a 0%, #3e1616 50%, #600f0f 100%);
    color: #ff5050;
    border-color: rgba(255, 80, 80, 0.3);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5),
                0 0 20px rgba(255, 80, 80, 0.2);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(10, 10, 20, 0.5);
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 255, 255, 0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 255, 255, 0.5);
}

/* Additional Glow Effects */
h1 {
    color: #ffffff !important;
    text-shadow: 0 0 25px rgba(255, 215, 0, 0.7);
    margin-bottom: 30px;
    font-size: 2.5em;
}

/* Tech-style animations */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.login-container h1 {
    animation: pulse 2s ease-in-out infinite;
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .chat-container {
        height: 90vh;
    }
    
    .history-panel {
        width: 100%;
        right: -100%;
    }
    
    .message {
        max-width: 95%;
    }
}