/* Reset & Base Styles */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --bg-gradient: linear-gradient(135deg, #f0f4fd 0%, #e8eefa 100%);
    --chat-bg: rgba(255, 255, 255, 0.95);
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --user-msg-bg: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --bot-msg-bg: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius-lg: 1.5rem;
    --radius-md: 1rem;
}

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

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

/* App Container */
.app-container {
    width: 100%;
    max-width: 900px;
    height: 95vh;
    background: var(--chat-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    margin: 0 20px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(20px);
}

/* Header */
.chat-header {
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #ffffff;
    border-bottom: 1px solid var(--border-color);
    z-index: 10;
}

.header-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    color: white;
    flex-shrink: 0;
}

.bot-avatar-header, .bot-avatar {
    background: linear-gradient(135deg, #10b981 0%, #3b82f6 100%);
    box-shadow: var(--shadow-sm);
}

.user-avatar {
    background: var(--user-msg-bg);
    box-shadow: var(--shadow-sm);
}

.header-text h1 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.2;
}

.header-text p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

#new-chat-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background: white;
    border-radius: 2rem;
    color: var(--text-main);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: 'Outfit', sans-serif;
}

#new-chat-btn:hover {
    background: #f3f4f6;
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* Chat Area */
.chat-area {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    scroll-behavior: smooth;
    background-image: radial-gradient(rgba(99, 102, 241, 0.05) 1px, transparent 1px);
    background-size: 20px 20px;
}

/* Scrollbar customization */
.chat-area::-webkit-scrollbar {
    width: 6px;
}

.chat-area::-webkit-scrollbar-track {
    background: transparent;
}

.chat-area::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 10px;
}

/* Message Bubbles */
.message {
    display: flex;
    gap: 1rem;
    max-width: 85%;
    animation: fadeIn 0.3s ease forwards;
}

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

.bot-message {
    align-self: flex-start;
}

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

.message-content {
    padding: 1rem 1.25rem;
    line-height: 1.5;
    font-size: 0.95rem;
    word-break: break-word;
}

.bot-message .message-content {
    background: var(--bot-msg-bg);
    color: var(--text-main);
    border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) 0;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(0,0,0,0.02);
}

.user-message .message-content {
    background: var(--user-msg-bg);
    color: white;
    border-radius: var(--radius-lg) var(--radius-lg) 0 var(--radius-lg);
    box-shadow: var(--shadow-md);
}

/* Markdown formatting inside message content */
.message-content p {
    margin-bottom: 0.75rem;
}
.message-content p:last-child {
    margin-bottom: 0;
}
.message-content strong {
    font-weight: 600;
}
.message-content em {
    font-style: italic;
}
.message-content pre {
    background: #1e293b;
    color: #f8fafc;
    padding: 1rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    margin: 0.5rem 0;
    font-family: monospace;
    font-size: 0.85rem;
}
.message-content code {
    background: rgba(0,0,0,0.1);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
    font-family: monospace;
    font-size: 0.9em;
}
.user-message .message-content code {
    background: rgba(255,255,255,0.2);
}

/* Loading Indicator */
.loading-message .message-content {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-style: italic;
    background: var(--bot-msg-bg);
}

.dots-loader {
    display: flex;
    gap: 4px;
}

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

.dots-loader span:nth-child(1) { animation-delay: -0.32s; }
.dots-loader span:nth-child(2) { animation-delay: -0.16s; }

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

/* Quick Questions */
.quick-questions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: auto;
    justify-content: center;
}

.quick-btn {
    background: white;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    padding: 0.6rem 1.2rem;
    border-radius: 2rem;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: 'Outfit', sans-serif;
    font-weight: 500;
}

.quick-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* Input Area */
.input-area {
    padding: 1.5rem;
    background: #ffffff;
    border-top: 1px solid var(--border-color);
    z-index: 10;
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 1rem;
    background: #f9fafb;
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    border-radius: var(--radius-lg);
    box-shadow: inset 0 2px 4px 0 rgba(0, 0, 0, 0.02);
    transition: border-color 0.2s ease;
}

.input-wrapper:focus-within {
    border-color: var(--primary-color);
}

#chat-input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 0.5rem 1rem;
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    color: var(--text-main);
    resize: none;
    max-height: 120px;
    outline: none;
    line-height: 1.5;
}

#chat-input::placeholder {
    color: #9ca3af;
}

.send-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
    margin-bottom: 2px;
}

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

.send-btn:disabled {
    background: #d1d5db;
    cursor: not-allowed;
    transform: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-container {
        height: 100vh;
        margin: 0;
        border-radius: 0;
        border: none;
    }

    .message {
        max-width: 95%;
    }

    .quick-questions {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 0.5rem;
    }

    .quick-btn {
        flex-shrink: 0;
    }

    .header-text h1 {
        font-size: 1.1rem;
    }

    #new-chat-btn span {
        display: none;
    }
    
    #new-chat-btn {
        border-radius: 50%;
        padding: 0.6rem;
        width: 40px;
        height: 40px;
        justify-content: center;
    }
}