/* ============================================
   FactSpark Chat Sidebar - Design System
   Issue #219 Phase 3 - Complete Replacement
   ============================================ */

/* Page wrapper with white background */
.page-wrapper {
    display: flex;
    background: var(--color-background); /* White instead of purple gradient */
    min-height: 100vh;
    align-items: flex-start;
}

/* Main content area (left side) */
.main-content {
    flex: 1;
    padding: var(--spacing-4);
    margin-right: 400px; /* Chat sidebar width */
}

@media (max-width: 768px) {
    .main-content {
        margin-right: 0;
        padding: var(--spacing-2);
    }
}

/* ========== Chat Sidebar ========== */
.chat-sidebar {
    position: fixed;
    right: 0;
    top: 64px; /* Push below header (Issue #221) */
    bottom: 0;
    width: 400px;
    background: var(--color-card); /* Off-white */
    display: flex;
    flex-direction: column;
    box-shadow: -4px 0 20px rgba(0,0,0,0.1);
    z-index: 1000;
    border-left: 1px solid var(--color-border);
}

@media (max-width: 768px) {
    .chat-sidebar {
        display: flex; /* Preserve flexbox layout on mobile */
        flex-direction: column; /* Stack children vertically */
        top: 0; /* Full height on mobile */
        width: 100%;
        transform: translateX(100%);
        transition: transform var(--transition-normal);
    }

    .chat-sidebar.open {
        transform: translateX(0);
    }
}

/* ========== Chat Header ========== */
.chat-header {
    padding: var(--spacing-3);
    border-bottom: 1px solid var(--color-border);
    background: #000000; /* FactSpark black header */
    color: white;
    flex-shrink: 0;
}

.chat-header h3 {
    margin: 0;
    font-size: var(--font-size-size-2);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.chat-header-subtitle {
    margin: var(--spacing-1) 0 0 0;
    font-size: var(--font-size-size-4);
    color: #808080; /* Gray text */
    font-weight: 400;
}

/* ========== Status Indicator ========== */
.status-indicator {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--color-success);
    margin-right: var(--spacing-1);
}

.status-indicator.connecting {
    background-color: var(--color-warning);
    animation: pulse 1.5s ease-in-out infinite;
}

.status-indicator.disconnected {
    background-color: var(--color-destructive);
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* ========== Messages Container ========== */
.messages-container,
.chat-messages {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden; /* Disable horizontal scrolling */
    min-height: 0; /* Allow flex item to shrink below content size for scrolling */
    padding: var(--spacing-3);
    background: var(--color-background); /* White background */
}

/* Custom scrollbar */
.messages-container::-webkit-scrollbar,
.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.messages-container::-webkit-scrollbar-track,
.chat-messages::-webkit-scrollbar-track {
    background: var(--color-muted);
}

.messages-container::-webkit-scrollbar-thumb,
.chat-messages::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

.messages-container::-webkit-scrollbar-thumb:hover,
.chat-messages::-webkit-scrollbar-thumb:hover {
    background: var(--color-muted-foreground);
}

/* ========== Message Bubbles ========== */
.message {
    margin-bottom: var(--spacing-3);
    display: flex;
    flex-direction: column;
}

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

.message.assistant {
    align-items: flex-start;
}

.message .sender {
    font-size: var(--font-size-size-4);
    color: var(--color-muted-foreground);
    margin-bottom: var(--spacing-1);
    font-weight: 600;
}

.message .content {
    max-width: 85%;
    padding: var(--spacing-2) var(--spacing-3);
    line-height: 1.5;
    font-size: var(--font-size-size-3);
}

/* User message bubble - FactSpark blue */
.message.user .content {
    background-color: var(--color-primary);
    color: var(--color-primary-foreground);
    border-radius: var(--radius-md) var(--radius-md) 4px var(--radius-md);
    box-shadow: var(--shadow-sm);
}

/* Assistant message bubble - White with blue left border */
.message.assistant .content {
    background-color: var(--color-card);
    color: var(--color-foreground);
    border-left: 3px solid var(--color-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

/* Timestamp */
.message .timestamp {
    font-size: 11px;
    color: var(--color-muted-foreground);
    margin-top: var(--spacing-1);
}

/* ========== Typing Indicator ========== */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: var(--spacing-2);
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--color-muted-foreground);
    animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
    }
    30% {
        transform: translateY(-8px);
    }
}

/* ========== Input Container ========== */
.input-container {
    padding: var(--spacing-3);
    border-top: 1px solid var(--color-border);
    background: var(--color-card);
    flex-shrink: 0;
}

.input-wrapper {
    display: flex;
    gap: var(--spacing-2);
}

.input-container textarea {
    flex: 1;
    padding: var(--spacing-2);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-size-3);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    resize: none;
    min-height: 44px;
    max-height: 120px;
    transition: border-color var(--transition-normal);
    background-color: var(--color-input);
    color: var(--color-foreground);
}

.input-container textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.input-container button {
    padding: var(--spacing-2) var(--spacing-3);
    background-color: var(--color-primary);
    color: var(--color-primary-foreground);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
    min-width: 80px;
}

.input-container button:hover:not(:disabled) {
    background-color: oklch(0.45 0.2 234.38);
    transform: translateY(-1px);
}

.input-container button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ========== Mobile Toggle Button ========== */
.chat-toggle {
    display: none;
    position: fixed;
    bottom: var(--spacing-3);
    right: var(--spacing-3);
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: var(--color-primary);
    color: white;
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    z-index: 999;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.chat-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
}

@media (max-width: 768px) {
    .chat-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* ========== Error/Success Messages ========== */
.error-message {
    background-color: oklch(0.95 0.05 29.7); /* Light red background */
    border-left: 3px solid var(--color-destructive);
    color: var(--color-destructive);
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-2);
    font-size: var(--font-size-size-4);
}

.success-message {
    background-color: oklch(0.95 0.05 142.5); /* Light green background */
    border-left: 3px solid var(--color-success);
    color: oklch(0.4 0.15 142.5); /* Darker green text */
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-2);
    font-size: var(--font-size-size-4);
}

/* ========== Empty State ========== */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--color-muted-foreground);
    text-align: center;
    padding: var(--spacing-4);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-2);
    opacity: 0.5;
}

.empty-state-text {
    font-size: var(--font-size-size-3);
    margin-bottom: var(--spacing-1);
}

.empty-state-subtext {
    font-size: var(--font-size-size-4);
    color: var(--color-muted-foreground);
}