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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
    width: 100%;
    max-width: 800px;
    height: 700px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.header {
    background: linear-gradient(135deg, #4f46e5, #7c3aed);
    padding: 24px;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    position: relative;
    z-index: 1;
}

.header p {
    font-size: 16px;
    opacity: 0.9;
    position: relative;
    z-index: 1;
}

.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow: hidden;
}

.messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.message {
    max-width: 80%;
    padding: 16px 20px;
    border-radius: 18px;
    line-height: 1.5;
    animation: slideIn 0.3s ease-out;
    word-wrap: break-word;
}

.message.user {
    background: linear-gradient(135deg, #4f46e5, #7c3aed);
    color: white;
    align-self: flex-end;
    margin-left: auto;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.message.ai {
    background: #f8fafc;
    color: #1e293b;
    align-self: flex-start;
    border: 1px solid #e2e8f0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.message.ai .platform-tag {
    display: inline-block;
    background: linear-gradient(135deg, #06b6d4, #0891b2);
    color: white;
    padding: 4px 8px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 8px;
}

.input-container {
    padding: 24px;
    background: #fafafb;
    border-top: 1px solid #e2e8f0;
}

.input-wrapper {
    display: flex;
    gap: 12px;
    align-items: flex-end;
}

.input-field {
    flex: 1;
    padding: 16px 20px;
    border: 2px solid #e2e8f0;
    border-radius: 16px;
    font-size: 16px;
    resize: none;
    min-height: 56px;
    max-height: 120px;
    font-family: inherit;
    transition: all 0.2s ease;
    background: white;
}

.input-field:focus {
    outline: none;
    border-color: #4f46e5;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.send-btn {
    background: linear-gradient(135deg, #4f46e5, #7c3aed);
    color: white;
    border: none;
    border-radius: 16px;
    padding: 16px 24px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    min-height: 56px;
}

.send-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(79, 70, 229, 0.4);
}

.send-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.loading {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #64748b;
    font-style: italic;
}

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

.loading-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #64748b;
    animation: bounce 1.4s infinite ease-in-out;
}

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

.copy-btn {
    background: #10b981;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    margin-top: 12px;
    transition: all 0.2s ease;
}

.copy-btn:hover {
    background: #059669;
    transform: translateY(-1px);
}

.welcome-message {
    text-align: center;
    color: #64748b;
    font-style: italic;
    margin: auto;
    padding: 40px;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@media (max-width: 768px) {
    .container {
        height: 100vh;
        border-radius: 0;
        max-width: none;
    }
    
    .message {
        max-width: 90%;
    }
    
    .header h1 {
        font-size: 24px;
    }
    
    .input-wrapper {
        flex-direction: column;
        gap: 12px;
    }
    
    .send-btn {
        width: 100%;
    }
}