/* Style definitions for Fastly ARC Chatbot App */

:root {
    --color-bg-primary: #0a0a0c;
    --color-bg-secondary: #141418;
    --color-bg-tertiary: #1e1e24;
    
    --color-text-primary: #f5f5f7;
    --color-text-secondary: #a0a0ab;
    --color-text-muted: #71717a;
    
    --color-red: #e11d48;
    --color-red-hover: #be123c;
    --color-red-light: #fda4af;
    --color-red-glow: rgba(225, 29, 72, 0.15);
    --color-red-bubble: rgba(225, 29, 72, 0.08);
    
    --border-color: #27272a;
    --border-color-active: #e11d48;
    
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    
    --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);
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.app-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Hero Section */
.hero-section {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.hero-title {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.05em;
    color: var(--color-text-primary);
    margin-bottom: 0.75rem;
    background: linear-gradient(135deg, var(--color-text-primary) 30%, var(--color-red) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-description {
    font-size: 1rem;
    color: var(--color-text-secondary);
    max-width: 680px;
    margin: 0 auto;
    line-height: 1.6;
}

.hero-description strong {
    color: var(--color-red-light);
    font-weight: 600;
}

/* Chat Layout */
.chat-container {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    min-height: 350px;
    max-height: 550px;
}

/* Message Styles */
.message {
    display: flex;
    flex-direction: column;
    max-width: 80%;
    animation: fadeIn 0.3s ease-out;
}

.message-content {
    padding: 0.875rem 1.25rem;
    border-radius: var(--border-radius-md);
    font-size: 0.95rem;
    line-height: 1.55;
    word-break: break-word;
}

/* Bot Message */
.bot-message {
    align-self: flex-start;
}

.bot-message .message-content {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    border: 1px solid var(--border-color);
    border-top-left-radius: 2px;
}

/* Custom indicator for the active streaming bot response */
.bot-message.streaming .message-content::after {
    content: "▋";
    display: inline-block;
    color: var(--color-red);
    animation: blink 1s step-end infinite;
    margin-left: 2px;
}

/* User Message */
.user-message {
    align-self: flex-end;
}

.user-message .message-content {
    background-color: var(--color-red-bubble);
    color: var(--color-text-primary);
    border: 1px solid rgba(225, 29, 72, 0.3);
    border-top-right-radius: 2px;
}

/* Model Label Badge */
.model-label {
    font-size: 0.725rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 0.35rem;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.bot-message .model-label {
    align-self: flex-start;
    color: var(--color-red-light);
    margin-left: 0.25rem;
}

.user-message .model-label {
    align-self: flex-end;
    color: var(--color-text-muted);
    margin-right: 0.25rem;
}

/* Welcome specific style */
.welcome .message-content {
    border-left: 3px solid var(--color-red);
}

/* Suggestions / Sample Questions */
.suggestions-container {
    display: flex;
    gap: 0.75rem;
    padding: 0 1.5rem 1rem 1.5rem;
    flex-wrap: wrap;
    background-color: var(--color-bg-secondary);
}

.suggestion-btn {
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--color-text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-fast);
}

.suggestion-btn:hover {
    border-color: var(--color-red-light);
    color: var(--color-text-primary);
    background-color: var(--color-red-glow);
}

/* Chat Input Form */
.chat-form {
    display: flex;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--color-bg-secondary);
}

#user-input {
    flex: 1;
    background-color: var(--color-bg-primary);
    border: 1px solid var(--border-color);
    color: var(--color-text-primary);
    padding: 0.875rem 1.25rem;
    border-radius: var(--border-radius-md);
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition-fast);
}

#user-input:focus {
    border-color: var(--border-color-active);
    box-shadow: 0 0 0 2px var(--color-red-glow);
}

#send-btn {
    background-color: var(--color-red);
    color: #ffffff;
    border: none;
    padding: 0 1.5rem;
    border-radius: var(--border-radius-md);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-fast);
}

#send-btn:hover {
    background-color: var(--color-red-hover);
}

#send-btn:disabled {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-muted);
    border: 1px solid var(--border-color);
    cursor: not-allowed;
}

/* Markdown styling inside messages */
.message-content p {
    margin-bottom: 0.5rem;
}

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

.message-content code {
    background-color: var(--color-bg-primary);
    padding: 0.15rem 0.35rem;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.85em;
    color: var(--color-red-light);
}

.message-content pre {
    background-color: var(--color-bg-primary);
    padding: 1rem;
    border-radius: var(--border-radius-sm);
    overflow-x: auto;
    margin: 0.75rem 0;
    border: 1px solid var(--border-color);
}

.message-content pre code {
    background-color: transparent;
    padding: 0;
    font-size: 0.85rem;
    color: var(--color-text-primary);
}

.message-content ul, .message-content ol {
    margin-left: 1.25rem;
    margin-bottom: 0.5rem;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes blink {
    from, to { opacity: 1; }
    50% { opacity: 0; }
}

/* Mobile Responsive Adjustments */
@media (max-width: 640px) {
    .app-container {
        padding: 1rem;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .chat-messages {
        padding: 1rem;
    }
    
    .suggestions-container {
        padding: 0 1rem 0.75rem 1rem;
        gap: 0.5rem;
    }
    
    .suggestion-btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }
    
    .chat-form {
        padding: 0.75rem 1rem;
    }
    
    #send-btn span {
        display: none;
    }
    
    #send-btn {
        padding: 0 1rem;
    }
}