:root {
    --bg: #05070a;
    --surface: #0d1117;
    --surface-light: #161b22;
    --border: #30363d;
    --border-hover: #484f58;
    --text: #f0f6fc;
    --text-muted: #8b949e;
    
    --blue: #58a6ff;
    --blue-glow: rgba(88, 166, 255, 0.15);
    
    --green: #3fb950;
    --green-glow: rgba(63, 185, 80, 0.15);
    
    --amber: #d29922;
    --amber-glow: rgba(210, 153, 34, 0.15);
    
    --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.8);
}

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

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    height: 100vh;
    overflow: hidden;
    display: flex;
}

/* Sidebar / Sidebar Navigation */
.sidebar {
    width: 280px;
    height: 100vh;
    background-color: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 24px;
    flex-shrink: 0;
    overflow: hidden;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--blue), #8250df);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: 0 4px 12px rgba(88, 166, 255, 0.3);
}

.logo-text h1 {
    font-size: 18px;
    font-weight: 700;
}

.logo-text span {
    color: var(--blue);
}

.agent-selector {
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex-shrink: 0;
    margin-bottom: 12px;
}

.agent-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-muted);
    cursor: pointer;
    text-align: left;
    transition: var(--transition);
}

.agent-btn:hover {
    border-color: var(--border-hover);
    background: var(--surface-light);
    transform: translateY(-2px);
}

.agent-btn.active {
    border-color: currentColor;
    background: var(--surface-light);
    color: var(--text);
}

.agent-btn.blue.active { border-color: var(--blue); box-shadow: 0 4px 15px var(--blue-glow); }
.agent-btn.green.active { border-color: var(--green); box-shadow: 0 4px 15px var(--green-glow); }
.agent-btn.amber.active { border-color: var(--amber); box-shadow: 0 4px 15px var(--amber-glow); }

.agent-btn-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    background: var(--surface-light);
}

.agent-btn-text .title {
    display: block;
    font-size: 14px;
    font-weight: 600;
}

.agent-btn-text .subtitle {
    display: block;
    font-size: 11px;
    color: var(--text-muted);
}

/* Visit Context Panel */
.visit-context-panel {
    background: var(--surface-light);
    border-radius: 16px;
    padding: 16px;
    border: 1px solid var(--border);
    margin-bottom: 12px;
    min-height: 0;
    flex-shrink: 1;
    display: flex;
    flex-direction: column;
}

.context-fields {
    display: flex;
    flex-direction: column;
    gap: 8px;
    overflow-y: auto;
    max-height: 200px;
    padding-right: 2px;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.context-fields::-webkit-scrollbar {
    width: 4px;
}

.context-fields::-webkit-scrollbar-track {
    background: transparent;
}

.context-fields::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.context-fields::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

.context-field label {
    display: block;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.context-field input {
    width: 100%;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 7px 10px;
    font-size: 12px;
    color: var(--text);
    outline: none;
    transition: var(--transition);
    box-sizing: border-box;
}

.context-field input:focus {
    border-color: var(--accent, var(--blue));
}

.context-field input::placeholder {
    color: var(--text-muted);
    opacity: 0.6;
}

/* Evidence Panel */
.evidence-panel {
    margin-top: auto;
    background: var(--surface-light);
    border-radius: 16px;
    padding: 16px;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    min-height: 0;
    flex-shrink: 1;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.panel-header h3 {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
}

.badge {
    background: var(--accent, var(--blue));
    color: black;
    font-size: 10px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 10px;
}

.evidence-list {
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 280px;
    padding-right: 2px;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.evidence-list::-webkit-scrollbar {
    width: 4px;
}

.evidence-list::-webkit-scrollbar-track {
    background: transparent;
}

.evidence-list::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.evidence-list::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

.evidence-item {
    padding: 10px;
    background: var(--surface);
    border-radius: 8px;
    border: 1px solid var(--border);
    font-size: 11px;
    transition: var(--transition);
    cursor: pointer;
    text-decoration: none;
    color: var(--text);
}

.evidence-item:hover {
    border-color: var(--accent, var(--blue));
    background: var(--surface-light);
    transform: translateX(4px);
}

.evidence-item .type {
    display: block;
    color: var(--accent, var(--blue));
    font-weight: 700;
    font-size: 9px;
    margin-bottom: 4px;
}

.empty-state {
    font-size: 11px;
    color: var(--text-muted);
    text-align: center;
    padding: 20px 0;
}

/* Chat Container */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    background: radial-gradient(circle at top right, var(--surface), var(--bg));
}

.app-header {
    padding: 24px 40px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(13, 17, 23, 0.8);
    backdrop-filter: blur(10px);
}

.chat-container {
    flex: 1;
    padding: 40px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.chat-placeholder {
    margin: auto;
    text-align: center;
    max-width: 500px;
}

.chat-placeholder h2 {
    font-size: 24px;
    margin-bottom: 16px;
}

.chat-placeholder p {
    color: var(--text-muted);
}

.input-area {
    padding: 24px 40px;
    background: linear-gradient(to top, var(--bg), transparent);
}

.input-wrapper {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    background: var(--surface-light);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 8px 16px;
    display: flex;
    align-items: flex-end;
    gap: 12px;
    transition: var(--transition);
}

.input-wrapper:focus-within {
    border-color: var(--blue);
    box-shadow: 0 0 0 2px var(--blue-glow);
}

textarea {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text);
    font-family: inherit;
    font-size: 15px;
    padding: 12px 0;
    resize: none;
    outline: none;
    max-height: 200px;
}

.mic-btn {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border);
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
    transition: var(--transition);
}

.mic-btn:hover {
    color: var(--accent, var(--blue));
    border-color: var(--accent, var(--blue));
}

.mic-btn.listening {
    color: #f85149;
    border-color: #f85149;
    background: #f8514920;
    animation: pulse-mic 1s ease-in-out infinite;
}

@keyframes pulse-mic {
    0%, 100% { box-shadow: 0 0 0 0 #f8514940; }
    50% { box-shadow: 0 0 0 6px #f8514910; }
}

.send-btn {
    background: var(--accent, var(--blue));
    color: white;
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 6px;
}

/* Messages */
.message {
    max-width: 85%;
    padding: 16px 20px;
    border-radius: 12px;
    animation: fadeIn 0.3s ease;
}

.message.user {
    align-self: flex-end;
    background: var(--surface-light);
    border: 1px solid var(--border);
    border-bottom-right-radius: 4px;
}

.message.assistant {
    align-self: flex-start;
    background: rgba(88, 166, 255, 0.05);
    border: 1px solid var(--blue-glow);
    border-bottom-left-radius: 4px;
    border-left: 4px solid var(--accent, var(--blue));
}

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

/* Markdown rendering */
.message.assistant .message-content h1,
.message.assistant .message-content h2,
.message.assistant .message-content h3 {
    margin: 16px 0 8px;
    font-weight: 600;
    color: var(--text);
}
.message.assistant .message-content h1 { font-size: 1.2em; }
.message.assistant .message-content h2 { font-size: 1.1em; }
.message.assistant .message-content h3 { font-size: 1em; color: var(--accent); }
.message.assistant .message-content p { margin: 8px 0; line-height: 1.7; }
.message.assistant .message-content ul,
.message.assistant .message-content ol {
    margin: 8px 0;
    padding-left: 20px;
}
.message.assistant .message-content li { margin: 4px 0; line-height: 1.6; }
.message.assistant .message-content strong { color: var(--text); font-weight: 600; }
.message.assistant .message-content em { color: var(--text-muted); }
.message.assistant .message-content code {
    background: var(--surface-light);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 2px 6px;
    font-family: monospace;
    font-size: 0.9em;
}
.message.assistant .message-content pre {
    background: var(--surface-light);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px;
    overflow-x: auto;
    margin: 10px 0;
}
.message.assistant .message-content pre code {
    background: none;
    border: none;
    padding: 0;
}
.message.assistant .message-content hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 14px 0;
}
.message.assistant .message-content blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 12px;
    color: var(--text-muted);
    margin: 8px 0;
}

/* Glassmorphism / Polish */
.glass {
    background: rgba(22, 27, 34, 0.6);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Hamburger button */
.hamburger {
    display: none;
    position: fixed;
    top: 14px;
    left: 14px;
    z-index: 1000;
    background: var(--surface-light);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-size: 20px;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 998;
}

/* Responsive */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .sidebar {
        position: fixed;
        left: -300px;
        top: 0;
        z-index: 999;
        width: 280px;
        height: 100vh;
        transition: left 0.3s ease;
        padding: 24px;
    }

    .sidebar.open {
        left: 0;
    }

    .sidebar-overlay.open {
        display: block;
    }

    .main-content {
        margin-left: 0;
        width: 100%;
    }

    body {
        padding-top: 0;
    }
}