:root {
    --bg-dark: hsl(225, 15%, 8%);
    --bg-panel: hsla(225, 15%, 15%, 0.6);
    --bg-chat: hsl(225, 10%, 11%);
    --bg-input: hsl(225, 12%, 18%);
    
    --primary: hsl(250, 80%, 65%);
    --primary-hover: hsl(250, 80%, 75%);
    
    --text-main: hsl(0, 0%, 95%);
    --text-muted: hsl(225, 15%, 65%);
    
    --accent-red: hsl(350, 80%, 65%);
    --accent-green: hsl(150, 80%, 45%);
    --accent-yellow: hsl(40, 90%, 60%);
    
    --border: hsla(225, 20%, 30%, 0.4);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 24px;
    
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    width: 100%;
    max-width: 1400px;
    height: 100vh;
    background: radial-gradient(circle at top left, hsla(250, 30%, 20%, 0.2), transparent 40%);
}

/* Sidebar Debug Panel */
.debug-panel {
    width: 320px;
    min-width: 320px;
    background: var(--bg-panel);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--border);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow-y: auto;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.panel-header h2 {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-muted);
}

.status-indicator.active {
    background-color: var(--accent-green);
    box-shadow: 0 0 10px var(--accent-green);
}

.stat-card {
    background: hsla(0, 0%, 0%, 0.2);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.stat-row {
    display: flex;
    gap: 12px;
}

.stat-card.half {
    flex: 1;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.stat-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary);
    word-break: break-all;
}

.flags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.flag {
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: 20px;
    font-weight: 600;
    text-transform: uppercase;
}

.flag.none {
    background: hsla(0, 0%, 100%, 0.1);
    color: var(--text-muted);
}

.flag.evaluator-flag {
    background: hsla(350, 80%, 65%, 0.2);
    color: var(--accent-red);
    border: 1px solid hsla(350, 80%, 65%, 0.5);
}

/* Chat Area */
.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-chat);
    position: relative;
}

.chat-header {
    height: 72px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    background: hsla(225, 10%, 11%, 0.8);
    backdrop-filter: blur(10px);
    z-index: 10;
}

.branding {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--primary), hsl(280, 80%, 60%));
    border-radius: 6px;
}

.chat-header h1 {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-main);
}

.conversation-id {
    font-size: 0.8rem;
    color: var(--text-muted);
    background: var(--bg-input);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-family: monospace;
}

.chat-messages {
    flex: 1;
    padding: 32px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 24px;
    scroll-behavior: smooth;
}

.message {
    display: flex;
    gap: 16px;
    max-width: 80%;
    animation: fadeIn 0.4s ease-out;
}

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

.message.user-message {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.assistant-message .avatar {
    background: linear-gradient(135deg, hsla(250, 80%, 65%, 0.2), transparent);
    border: 1px solid hsla(250, 80%, 65%, 0.4);
}

.user-message .avatar {
    background: hsla(0, 0%, 100%, 0.1);
}

.message-content {
    background: var(--bg-input);
    padding: 16px 20px;
    border-radius: var(--radius-md);
    line-height: 1.6;
    font-size: 0.95rem;
    color: var(--text-main);
    border: 1px solid var(--border);
}

.user-message .message-content {
    background: linear-gradient(135deg, var(--primary), hsl(280, 70%, 55%));
    border: none;
    color: white;
}

.sources-container {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.source-tag {
    display: inline-block;
    background: hsla(0, 0%, 0%, 0.3);
    padding: 2px 8px;
    border-radius: 4px;
    margin-right: 6px;
    margin-top: 6px;
    border: 1px solid var(--border);
}

.warning-banner {
    display: flex;
    align-items: center;
    gap: 8px;
    background: hsla(40, 90%, 60%, 0.15);
    color: var(--accent-yellow);
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    margin-top: 12px;
    font-size: 0.85rem;
    border: 1px solid hsla(40, 90%, 60%, 0.3);
}

/* Input Area */
.chat-input-area {
    padding: 24px 32px;
    background: linear-gradient(to top, var(--bg-chat), transparent);
}

#chat-form {
    position: relative;
    display: flex;
    align-items: center;
}

#user-input {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 18px 60px 18px 24px;
    color: var(--text-main);
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

#user-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px hsla(250, 80%, 65%, 0.2), 0 4px 20px rgba(0,0,0,0.2);
}

#user-input::placeholder {
    color: var(--text-muted);
}

#send-btn {
    position: absolute;
    right: 8px;
    background: var(--primary);
    color: white;
    border: none;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

#send-btn:hover {
    background: var(--primary-hover);
    transform: scale(1.05);
}

#send-btn:disabled {
    background: var(--border);
    cursor: not-allowed;
    transform: none;
}

/* Loading Animation */
.typing-indicator {
    display: inline-flex;
    gap: 4px;
    padding: 8px 12px;
}

.typing-dot {
    width: 6px;
    height: 6px;
    background-color: var(--text-muted);
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out both;
}

.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes typing {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    .debug-panel {
        width: 100%;
        height: 250px;
        min-height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
}