:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --bg-color: #f3f4f6;
    --chat-bg: #ffffff;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --bubble-ai: #f8fafc;
    --bubble-user: #4f46e5;
    --user-text: #ffffff;
    --border-color: #e5e7eb;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
}

.chat-container {
    width: 100%;
    max-width: 900px;
    height: 95vh;
    background-color: var(--chat-bg);
    border-radius: 20px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-header {
    padding: 20px 25px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--chat-bg);
    z-index: 10;
}

.header-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.3rem;
}

.ai-avatar {
    background: linear-gradient(135deg, var(--primary), #818cf8);
    color: white;
}

.user-avatar {
    background-color: #9ca3af;
    color: white;
}

.header-info h1 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-main);
}

.header-info p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.icon-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    padding: 10px 16px;
    border-radius: 10px;
    color: var(--text-main);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.icon-btn:hover {
    background-color: var(--bg-color);
    border-color: #d1d5db;
}

.icon-btn:active {
    transform: scale(0.96);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 25px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    scroll-behavior: smooth;
}

/* Custom Scrollbar */
.chat-messages::-webkit-scrollbar {
    width: 6px;
}
.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}
.chat-messages::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 10px;
}
.chat-messages::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

.message-wrapper {
    display: flex;
    gap: 15px;
    max-width: 85%;
    animation: fadeIn 0.3s ease-out;
}

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

.message-wrapper.ai {
    align-self: flex-start;
}

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

.message-bubble {
    padding: 16px 20px;
    border-radius: 18px;
    line-height: 1.6;
    font-size: 0.95rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.02);
}

.ai .message-bubble {
    background-color: var(--bubble-ai);
    border: 1px solid var(--border-color);
    border-top-left-radius: 4px;
    color: var(--text-main);
}

.user .message-bubble {
    background-color: var(--bubble-user);
    color: var(--user-text);
    border-top-right-radius: 4px;
}

.message-bubble p {
    margin-bottom: 12px;
}

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

.message-bubble strong {
    font-weight: 600;
}

/* Quick Questions */
.quick-questions-wrapper {
    padding: 5px 25px 15px;
}

.quick-questions {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    padding-bottom: 8px;
    scrollbar-width: none; /* Firefox */
}

.quick-questions::-webkit-scrollbar {
    display: none; /* Chrome, Safari */
}

.quick-btn {
    white-space: nowrap;
    background-color: var(--chat-bg);
    border: 1px solid var(--primary);
    padding: 10px 18px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--primary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.quick-btn:hover {
    background-color: var(--primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(79, 70, 229, 0.2);
}

.chat-input-area {
    padding: 20px 25px;
    background-color: var(--chat-bg);
    border-top: 1px solid var(--border-color);
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 12px 18px;
    transition: all 0.2s;
}

.input-wrapper:focus-within {
    border-color: var(--primary);
    background-color: #fff;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

textarea {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    resize: none;
    max-height: 150px;
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text-main);
    padding: 6px 0;
    scrollbar-width: thin;
}

.send-btn {
    background-color: var(--primary);
    color: white;
    border: none;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
    font-size: 1.1rem;
}

.send-btn:hover:not(:disabled) {
    background-color: var(--primary-hover);
    transform: scale(1.05);
}

.send-btn:active:not(:disabled) {
    transform: scale(0.95);
}

.send-btn:disabled {
    background-color: #cbd5e1;
    cursor: not-allowed;
    opacity: 0.7;
}

.input-footer {
    text-align: center;
    margin-top: 10px;
}

.input-footer p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.loading-indicator {
    display: flex;
    gap: 6px;
    align-items: center;
    padding: 4px 0;
}

.loading-indicator span {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-right: 4px;
}

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

.dot:nth-child(2) { animation-delay: -0.32s; }
.dot:nth-child(3) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% { transform: scale(0); opacity: 0.5; }
    40% { transform: scale(1); opacity: 1; }
}

@media (max-width: 768px) {
    .chat-container {
        height: 100vh;
        border-radius: 0;
        max-width: 100%;
    }
    
    .message-wrapper {
        max-width: 95%;
    }
    
    .chat-header {
        padding: 15px 20px;
    }
    
    .chat-messages {
        padding: 20px;
    }
    
    .chat-input-area {
        padding: 15px 20px;
    }
}