:root {
    --bg-dark: #0a0a0f;
    --bg-terminal: #0d1117;
    --bg-card: #161b22;
    --border: #30363d;
    --text-primary: #e6edf3;
    --text-muted: #8b949e;
    --accent-blue: #58a6ff;
    --accent-green: #3fb950;
    --accent-yellow: #d29922;
    --accent-red: #f85149;
    --accent-purple: #a371f7;
    --accent-cyan: #39c5cf;
    --accent-orange: #f0883e;
    --glow-blue: rgba(88, 166, 255, 0.3);
    --glow-green: rgba(63, 185, 80, 0.3);
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

.bg-grid {
    position: fixed;
    inset: 0;
    background-image: 
        linear-gradient(rgba(88, 166, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(88, 166, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 2rem;
    animation: fadeInDown 0.8s ease-out;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 0 30px var(--glow-blue);
}

.logo-img {
    width: 64px;
    height: 64px;
    object-fit: contain;
    filter: drop-shadow(0 0 20px var(--glow-blue));
}

.logo-text {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--text-muted);
    font-size: 1rem;
}

.tagline span {
    color: var(--accent-green);
}

/* Chat container */
.chat-container {
    background: var(--bg-terminal);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.chat-header {
    background: var(--bg-card);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.chat-header-dots {
    display: flex;
    gap: 6px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.chat-header-title {
    flex: 1;
    text-align: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.chat-body {
    padding: 1.5rem;
    max-height: 70vh;
    overflow-y: auto;
}

.chat-body::-webkit-scrollbar {
    width: 8px;
}
.chat-body::-webkit-scrollbar-track {
    background: var(--bg-terminal);
}
.chat-body::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

/* Messages */
.message {
    margin-bottom: 1.5rem;
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.message.visible {
    opacity: 1;
    transform: translateY(0);
}

.message-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.avatar {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

.avatar.user {
    background: var(--accent-orange);
}

.avatar.claude {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
}

.sender-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.sender-name.user { color: var(--accent-orange); }
.sender-name.claude { color: var(--accent-blue); }

.message-content {
    padding-left: 36px;
    line-height: 1.7;
    color: var(--text-primary);
}

.message-content p {
    margin-bottom: 0.75rem;
}

.message-content p:last-child {
    margin-bottom: 0;
}

/* Tool call box */
.tool-call {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin: 1rem 0;
    overflow: hidden;
}

.tool-call-header {
    background: rgba(163, 113, 247, 0.1);
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--accent-purple);
}

.tool-call-body {
    padding: 1rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
}

.tool-param {
    color: var(--accent-cyan);
}

.tool-value {
    color: var(--accent-yellow);
}

/* Approval box */
.approval-box {
    background: linear-gradient(135deg, rgba(63, 185, 80, 0.15), rgba(63, 185, 80, 0.05));
    border: 1px solid var(--accent-green);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    margin: 0.75rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.approval-icon {
    background: var(--accent-green);
    color: var(--bg-dark);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: bold;
    box-shadow: 0 0 15px var(--glow-green);
}

.approval-text {
    flex: 1;
}

.approval-title {
    color: var(--accent-green);
    font-weight: 600;
    font-size: 0.85rem;
}

.approval-details {
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* Result box */
.result-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    margin: 0.75rem 0;
}

.result-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-green);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
    font-family: 'JetBrains Mono', monospace;
}

.result-row {
    display: flex;
    justify-content: space-between;
    padding: 0.4rem 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.85rem;
}

.result-row:last-child {
    border-bottom: none;
}

.result-label {
    color: var(--text-muted);
}

.result-value {
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
}

.result-value.highlight {
    color: var(--accent-yellow);
    font-weight: 600;
}

.hash-verified {
    color: var(--accent-green);
}

/* Comparison table */
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    font-size: 0.9rem;
}

.comparison-table th,
.comparison-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border: 1px solid var(--border);
}

.comparison-table th {
    background: rgba(88, 166, 255, 0.1);
    color: var(--accent-blue);
    font-weight: 600;
}

.comparison-table td {
    background: var(--bg-card);
}

.winner {
    color: var(--accent-green);
    font-weight: 700;
}

/* Insight list */
.insight-list {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.insight-list li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.insight-list strong {
    color: var(--accent-cyan);
}

/* DB2 Table */
.db2-section {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px dashed var(--border);
}

.db2-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-purple);
    font-weight: 600;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
}

.db2-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
    font-family: 'JetBrains Mono', monospace;
}

.db2-table th {
    background: rgba(163, 113, 247, 0.15);
    color: var(--accent-purple);
    padding: 0.6rem;
    text-align: left;
    border: 1px solid var(--border);
}

.db2-table td {
    padding: 0.6rem;
    border: 1px solid var(--border);
    color: var(--text-primary);
}

.db2-table .new-row {
    background: rgba(63, 185, 80, 0.1);
}

.db2-table .new-row td {
    border-color: rgba(63, 185, 80, 0.3);
    font-weight: 600;
}

/* Controls */
.controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
}

.btn {
    background: var(--accent-blue);
    color: var(--bg-dark);
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn:hover:not(:disabled) {
    background: var(--accent-cyan);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px var(--glow-blue);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn.secondary {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
}

.btn.secondary:hover:not(:disabled) {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
    background: transparent;
    box-shadow: none;
}

/* Speed control */
.speed-control {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1rem;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.speed-control input[type="range"] {
    width: 120px;
    accent-color: var(--accent-blue);
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer a {
    color: var(--accent-blue);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 640px) {
    .container {
        padding: 1rem;
    }
    
    .logo-text {
        font-size: 1.5rem;
    }
    
    .chat-header-title {
        font-size: 0.7rem;
    }
    
    .message-content {
        padding-left: 0;
        margin-top: 0.5rem;
    }
    
    .controls {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
}