styles.css

:root {
    --bg-primary: #131314;
    --bg-secondary: #1e1e1e;
    --bg-tertiary: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0c5;
    --accent-color: #8ab4f8;
    --accent-secondary: #c58af9;
    --gradient-start: #4286f4;
    --gradient-end: #7239ea;
    
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;
    --border-radius-xl: 40px;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    
    --sidebar-width: 80px;
    --topbar-height: 72px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

.app-container {
    display: flex;
    height: 100vh;
    position: relative;
    overflow: hidden;
}

.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--bg-tertiary);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border-radius: var(--border-radius-lg) var(--border-radius-lg) var(--border-radius-lg) var(--border-radius-lg); 
    margin: 10px 10px 5px 6px;
    box-shadow: var(--shadow-sm);
    position: relative;
    z-index: 10;
}

.sidebar-header {
    padding: 20px 14px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.model-selector {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    cursor: pointer;
    padding: 6px 10px;
    border-radius: var(--border-radius-md);
    transition: background-color 0.2s ease;
}

.model-selector:hover {
    background-color: var(--bg-tertiary);
}

.model-name {
    font-size: 16px;
    font-weight: 600;
}

.model-version {
    font-size: 12px;
    color: var(--text-secondary);
    text-align: center;
}

.sidebar-actions {
    padding: 20px;
    display: flex;
    justify-content: center;
}

.new-chat-btn {
    background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: var(--shadow-sm);
}

.new-chat-btn:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    background: linear-gradient(to left, var(--accent-secondary), var(--accent-color));
    transition: background 2s ease;
}

.sidebar-nav {
    margin-top: auto;
    padding: 24px 0;
}

.nav-items {
    list-style: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.nav-item {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.2s ease, background-color 0.2s ease;
    border-radius: var(--border-radius-md);
}

.nav-item:hover {
    color: var(--text-primary);
    background-color: #292929;
    box-shadow: 0px 0px 5px 5px var(--gradient-end);**
    transition: box-shadow 0.1s ease;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.top-bar {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 0 24px;
    background-color: var(--bg-secondary);
    background: 
        radial-gradient(circle at 20% 10%, rgba(68, 68, 68, 0.15), transparent 10%),
        radial-gradient(circle at 80% 70%, rgba(28, 28, 28, 0.15), transparent 30%);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 5;
    backdrop-filter: blur(40px);
}

.user-actions {
    display: flex;
    align-items: center;
    gap: 18px;
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease;
}

.icon-btn:hover {
    background-color: var(--bg-tertiary);
    
}

.user-avatar {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    transition: transform 0.2s ease;
}

.user-avatar:hover {
    transform: scale(1.2);
}

.user-avatar img {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: var(--shadow-sm);
}

.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.chat-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 40%, rgba(66, 134, 244, 0.15), transparent 30%),
        radial-gradient(circle at 80% 70%, rgba(114, 57, 234, 0.15), transparent 30%);
    pointer-events: none;
    z-index: 1;
    filter: blur(40px);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 28px;
    position: relative;
    z-index: 2;
}

.welcome-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    flex: 1;
    padding: 64px 32px;
}

.welcome-message {
    font-size: 42px;
    font-weight: 700;
    background: linear-gradient(to right, var(--accent-color), var(--gradient-end));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 24px;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.username {
    color: var(--accent-secondary);
}

.message {
    display: flex;
    gap: 18px;
    max-width: 75%;
    position: relative;
    z-index: 2;
}

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

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

.message-avatar {
    flex-shrink: 0;
}

.message-avatar img,
.ai-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
}

.ai-avatar {
    background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 500;
}

.message-content {
    background-color: var(--bg-secondary);
    padding: 14px 18px;
    border-radius: var(--border-radius-lg);
    font-size: 15px;
    line-height: 1.6;
    box-shadow: var(--shadow-sm);
}

.user-message .message-content {
    background-color: #3e3e42;
    border-radius: var(--border-radius-lg) 0 var(--border-radius-lg) var(--border-radius-lg);
}

.ai-message .message-content {
    background-color: var(--bg-secondary);
    border-radius: 0 var(--border-radius-lg) var(--border-radius-lg) var(--border-radius-lg);
}

.input-container {
    padding: 20px 32px 32px;
    background-color: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
    position: relative;
    z-index: 5;
}

.input-wrapper {
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius-xl);
    padding: 14px 18px;
    display: flex;
    align-items: flex-end;
    box-shadow: 0 0 30px rgba(188, 157, 255, 0.688);
    transition: box-shadow 0.2s ease, transform 0.2s ease;
    max-width: 768px;
    margin: 0 auto;
    position: relative;
    z-index: 3;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.input-wrapper:focus-within {
    box-shadow: 0 0 25px rgba(74, 141, 248, 0.614);
    transform: translateY(-2px);
}

#user-input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 15px;
    resize: none;
    padding: 3px 20px;
    max-height: 150px;
    min-height: 26px;
    align-self: center;
}

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

.input-actions {
    display: flex;
    gap: 12px;
    margin-left: 12px;
}

.mic-btn {
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

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

.send-btn {
    color: var(--accent-color);
    transition: color 0.2s ease, transform 0.2s ease;
}

.send-btn:not(:disabled):hover {
    color: var(--gradient-start);
    transform: scale(1.1);
}

.send-btn:disabled {
    color: var(--text-secondary);
    cursor: default;
}

.send-btn:disabled:hover {
    background-color: transparent;
}

@media (min-width: 768px) {
    .input-wrapper {
        margin: 0 auto;
        width: 100%;
        max-width: 768px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        height: auto;
        border-right: none;
        border-top: 1px solid var(--bg-tertiary);
        flex-direction: row;
        justify-content: space-around;
        padding: 12px 0;
        z-index: 100;
        border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
        margin: 0;
    }
    
    .sidebar-header, .sidebar-actions {
        display: none;
    }
    
    .nav-items {
        flex-direction: row;
        width: 100%;
        justify-content: space-around;
    }
    
    .main-content {
        padding-bottom: 70px;
    }
}

@media (max-width: 480px) {
    .top-bar {
        padding: 0 16px;
    }
    
    .chat-messages {
        padding: 20px;
    }
    
    .message {
        max-width: 90%;
    }
    
    .input-container {
        padding: 16px 20px 24px;
    }
    
    .welcome-message {
        font-size: 32px;
    }
}
.ai-message .message-content h1 {
    font-size: 1.5rem;
    margin: 0.8rem 0 0.5rem;
    color: var(--accent-color);
  }
  
  .ai-message .message-content h2 {
    font-size: 1.3rem;
    margin: 0.7rem 0 0.4rem;
    color: var(--accent-color);
  }
  
  .ai-message .message-content h3 {
    font-size: 1.1rem;
    margin: 0.6rem 0 0.3rem;
    color: var(--accent-secondary);
  }
  
  .ai-message .message-content ul {
    padding-left: 1.5rem;
    margin: 0.5rem 0;
  }
  
  .ai-message .message-content li {
    margin-bottom: 0.3rem;
  }
  
  .ai-message .message-content code {
    background-color: var(--bg-tertiary);
    padding: 0.1rem 0.3rem;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.9em;
  }
  
  .ai-message .message-content pre {
    background-color: var(--bg-tertiary);
    padding: 0.8rem;
    border-radius: var(--border-radius-sm);
    overflow-x: auto;
    margin: 0.7rem 0;
  }
  
  .ai-message .message-content pre code {
    background-color: transparent;
    padding: 0;
    display: block;
    white-space: pre;
  }
  
  .ai-message .message-content strong {
    color: var(--accent-color);
    font-weight: 600;
  }
  
  .ai-message .message-content em {
    font-style: italic;
    opacity: 0.85;
  }
  
  .ai-message {
    max-width: 85%;
  }
  
  .message-content {
    line-height: 1.5;
  }


@media (max-width: 768px) {
    .sidebar {
        display: none; 
    }
    
    .main-content {
        padding-bottom: 0; 
        width: 100%; 
    }
    
    .chat-container {
        margin-bottom: 0;
        height: calc(100vh - var(--topbar-height)); 
    }
    
    .top-bar {
        padding: 0 16px;
        height: var(--topbar-height);
        position: sticky;
        top: 0;
        z-index: 10;
    }
    
    .input-container {
        padding: 16px 16px 24px;
        background: transparent;
        position: sticky;
        bottom: 0;
        z-index: 5;
    }
    
    .input-wrapper {
        margin: 0 auto;
        max-width: calc(100% - 32px);
        background-color: var(--bg-secondary);
        border: 1px solid rgba(255, 255, 255, 0.05);
    }
    
    .chat-messages {
        height: calc(100vh - var(--topbar-height) - 120px); 
        padding: 20px 16px;
    }
}

@media (max-width: 480px) {
    .input-wrapper {
        padding: 10px 14px;
    }
    
    .input-actions {
        gap: 8px;
    }
    
    .icon-btn {
        width: 36px;
        height: 36px;
    }
    
    .message {
        max-width: 95%;
    }
    
    .message-avatar img,
    .ai-avatar {
        width: 32px;
        height: 32px;
    }
    
    .message-content {
        padding: 12px 14px;
        font-size: 14px;
    }
    
    .welcome-message {
        font-size: 28px;
        padding: 0 16px;
    }
}

.input-wrapper,
.message-content {
    transition: all 0.3s ease;
}