.chatContainer {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
    background-color: var(--background-surface);
    overflow: hidden;
    position: relative;
}

.chatHeader {
    display: flex;
    align-items: center;
    padding: var(--spacing-4) var(--spacing-6);
    background-color: rgba(24, 27, 33, 0.8);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border-color);
    gap: var(--spacing-4);
    z-index: 10;
}

.backBtn {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.backBtn:hover {
    color: var(--color-primary);
}

.threadTitle {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
    text-align: center;
    /* Offset to center title */
}

.messageList {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-8) var(--spacing-6);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-8);
    background-color: var(--background-base);
}

.messageWrapper {
    display: flex;
    gap: var(--spacing-4);
    max-width: 85%;
    animation: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.assistantWrapper {
    align-self: flex-start;
}

.avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.userAvatar {
    background: var(--color-primary);
    color: white;
}

.assistantAvatar {
    background: var(--background-surface-hover);
    color: var(--color-primary);
    border: 1px solid var(--border-color);
}

.messageBubble {
    padding: var(--spacing-4) var(--spacing-5);
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    line-height: 1.6;
    position: relative;
    max-width: fit-content;
}

/* User Message - Primary color background, white text */
.userWrapper .messageBubble {
    background-color: var(--color-primary);
    color: #ffffff;
    border-top-right-radius: 4px;
    box-shadow: var(--shadow-md);
}

/* Assistant Message - Glassy dark background, white text */
.assistantWrapper .messageBubble {
    background-color: var(--background-surface);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-top-left-radius: 4px;
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-4) var(--spacing-6);
    min-width: 60px;
    position: relative;
    padding-right: var(--spacing-8);
    /* Room for copy button */
}

/* Markdown Content Styling */
.markdownContent {
    font-size: 0.9375rem;
    line-height: 1.6;
}

.markdownContent p {
    margin-bottom: var(--spacing-3);
}

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

.markdownContent h1,
.markdownContent h2,
.markdownContent h3 {
    margin-top: var(--spacing-4);
    margin-bottom: var(--spacing-2);
    color: var(--text-primary);
}

.markdownContent ul,
.markdownContent ol {
    margin-left: var(--spacing-6);
    margin-bottom: var(--spacing-3);
}

.markdownContent li {
    margin-bottom: var(--spacing-1);
}

.markdownContent code:not(pre code) {
    background-color: var(--background-surface-hover);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Monaco', 'Consolas', monospace;
    font-size: 0.85rem;
    color: var(--color-primary);
}

.markdownContent pre {
    margin: var(--spacing-4) 0;
    border-radius: 12px;
    overflow: hidden;
    background-color: #1a1b26 !important;
    /* VS Code Tokyo Night like background */
}

.markdownContent table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--spacing-4);
    font-size: 0.875rem;
}

.markdownContent th,
.markdownContent td {
    padding: var(--spacing-2) var(--spacing-3);
    border: 1px solid var(--border-color);
    text-align: left;
}

.markdownContent th {
    background-color: var(--background-surface-hover);
    font-weight: 600;
}

.markdownContent blockquote {
    border-left: 4px solid var(--color-primary);
    padding-left: var(--spacing-4);
    margin-left: 0;
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: var(--spacing-3);
}

.typingBubble {
    display: flex;
    gap: 4px;
    padding: 16px 20px !important;
    align-items: center;
    min-width: 60px;
}

.toolIndicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-4);
    background-color: var(--background-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
    animation: slideUp 0.3s ease-out;
    margin-left: 50px;
    /* Indent to align with assistant avatar */
    margin-bottom: var(--spacing-4);
    width: fit-content;
}

.toolSpinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.toolText {
    font-weight: 500;
}

.copyBtn {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 4px;
    border-radius: var(--radius-sm);
    color: var(--text-tertiary);
    background: transparent;
    border: none;
    cursor: pointer;
    opacity: 0;
    transition: all 0.2s ease;
}

.messageBubble:hover .copyBtn {
    opacity: 1;
}

.copyBtn:hover {
    background: var(--background-surface-hover);
    color: var(--color-primary);
}

.inputArea {
    padding: var(--spacing-6);
    background-color: var(--background-surface);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
    z-index: 20;
}

.inputContainer {
    width: 100%;
    max-width: 800px;
    background-color: var(--background-base);
    padding: 6px;
    border-radius: var(--radius-full);
    display: flex;
    gap: 8px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.inputContainer:focus-within {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.chatInput {
    flex: 1;
    background: transparent !important;
    border: none !important;
    padding: 10px 20px !important;
    color: var(--text-primary) !important;
    font-size: 0.95rem !important;
}

.chatInput:focus {
    box-shadow: none !important;
    outline: none !important;
}

.sendBtn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full) !important;
    padding: 0 !important;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary) !important;
    color: white !important;
}

.sendBtn:hover:not(:disabled) {
    background-color: var(--color-primary-hover) !important;
}

.fileBtn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full) !important;
    padding: 0 !important;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--background-surface) !important;
    color: var(--text-secondary) !important;
    border: 1px solid var(--border-color) !important;
    transition: all 0.2s ease;
}

.fileBtn:hover:not(:disabled) {
    background-color: var(--background-surface-hover) !important;
    color: var(--color-primary) !important;
    border-color: var(--color-primary) !important;
}

.fileBtn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.uploadSpinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.uploadError {
    margin-bottom: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-4);
    background-color: rgba(220, 38, 38, 0.1);
    border: 1px solid rgba(220, 38, 38, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-3);
    color: #ef4444;
    font-size: 0.875rem;
    animation: slideDown 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.uploadError .errorIcon {
    font-size: 1rem;
    margin: 0;
}

.errorClose {
    background: transparent;
    border: none;
    color: inherit;
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: background-color 0.2s ease;
}

.errorClose:hover {
    background-color: rgba(220, 38, 38, 0.1);
}

.loading,
.emptyState {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    gap: var(--spacing-4);
    color: var(--text-secondary);
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.emptyIcon {
    font-size: 3rem;
    margin-bottom: var(--spacing-2);
}

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

.typingDot:nth-child(1) {
    animation-delay: -0.32s;
}

.typingDot:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes bounce {

    0%,
    80%,
    100% {
        transform: scale(0);
        opacity: 0.3;
    }

    40% {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.errorState {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    gap: var(--spacing-4);
    color: var(--text-secondary);
    text-align: center;
    padding: var(--spacing-6);
}

.errorIcon {
    font-size: 3rem;
    margin-bottom: var(--spacing-2);
}

.retryBtn {
    margin-top: var(--spacing-4);
    background-color: var(--color-primary);
    color: #fff;
}

.errorBanner {
    margin: var(--spacing-4);
    margin-bottom: var(--spacing-6);
    padding: var(--spacing-3) var(--spacing-4);
    background-color: rgba(220, 38, 38, 0.1);
    border: 1px solid rgba(220, 38, 38, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-4);
    color: #ef4444;
    font-size: 0.875rem;
    animation: slideDown 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.errorContent {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.errorRetry {
    background: transparent;
    border: 1px solid currentColor;
    color: inherit;
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.errorRetry:hover {
    background-color: rgba(220, 38, 38, 0.1);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}