/**
 * 56K Knowledge Hub - Chat Components
 * Message bubbles, input, and chat-specific UI
 */

/* ============= WELCOME SCREEN ============= */

.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    padding: var(--space-6);
    text-align: center;
}

.welcome-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--color-accent) 0%, #0d9488 100%);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-6);
    box-shadow: var(--shadow-glow);
}

.welcome-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

.welcome-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
}

.welcome-subtitle {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    max-width: 480px;
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-8);
}

/* Feature Cards Grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
    max-width: 560px;
    width: 100%;
}

.feature-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.feature-card:hover {
    background: var(--color-bg-tertiary);
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
}

.feature-card-icon {
    width: 32px;
    height: 32px;
    background: var(--color-accent-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    margin-bottom: var(--space-3);
}

.feature-card-icon svg {
    width: 18px;
    height: 18px;
}

.feature-card-title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
}

.feature-card-desc {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    line-height: var(--line-height-normal);
}

@media (max-width: 480px) {
    .feature-grid {
        grid-template-columns: 1fr;
    }
}

/* ============= MESSAGES ============= */

.message {
    display: flex;
    gap: var(--space-3);
    padding: var(--space-4) 0;
    animation: messageIn 0.3s ease;
}

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

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

/* AI Message (left aligned) */
.message.ai {
    flex-direction: row;
}

/* User Message (right aligned) */
.message.user {
    flex-direction: row-reverse;
}

/* Message Avatar */
.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.message.ai .message-avatar {
    background: linear-gradient(135deg, var(--color-accent) 0%, #0d9488 100%);
    color: white;
}

.message.ai .message-avatar svg {
    width: 18px;
    height: 18px;
}

.message.user .message-avatar {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
}

.message.user .message-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-full);
}

/* Message Bubble */
.message-bubble {
    max-width: 85%;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    line-height: var(--line-height-relaxed);
}

.message.ai .message-bubble {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-top-left-radius: var(--radius-sm);
}

.message.user .message-bubble {
    background: var(--color-accent);
    color: white;
    border-top-right-radius: var(--radius-sm);
}

/* Message Content Markdown */
.message-content {
    font-size: var(--font-size-base);
}

.message-content p {
    margin-bottom: var(--space-3);
}

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

.message-content strong {
    font-weight: var(--font-weight-semibold);
}

.message-content ul,
.message-content ol {
    margin: var(--space-2) 0;
    padding-left: var(--space-5);
}

.message-content li {
    margin-bottom: var(--space-1);
}

.message-content code {
    background: var(--color-bg-tertiary);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    font-family: 'JetBrains Mono', monospace;
    font-size: var(--font-size-sm);
}

.message.user .message-content code {
    background: rgba(255, 255, 255, 0.2);
}

.message-content pre {
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--space-3);
    overflow-x: auto;
    margin: var(--space-3) 0;
}

.message-content pre code {
    background: transparent;
    padding: 0;
}

.message-content a {
    color: var(--color-accent);
    text-decoration: none;
}

.message-content a:hover {
    text-decoration: underline;
}

.message.user .message-content a {
    color: white;
    text-decoration: underline;
}

/* Message Actions */
.message-actions {
    display: flex;
    gap: var(--space-1);
    margin-top: var(--space-2);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.message:hover .message-actions {
    opacity: 1;
}

.message-action-btn {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.message-action-btn:hover {
    background: var(--color-bg-hover);
    color: var(--color-text-primary);
}

.message-action-btn svg {
    width: 14px;
    height: 14px;
}

/* ============= TYPING INDICATOR ============= */

.typing-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) 0;
}

.typing-dots {
    display: flex;
    gap: 4px;
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    border-top-left-radius: var(--radius-sm);
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--color-text-muted);
    border-radius: var(--radius-full);
    animation: typingBounce 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) {
    animation-delay: 0s;
}

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

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

@keyframes typingBounce {

    0%,
    80%,
    100% {
        transform: translateY(0);
    }

    40% {
        transform: translateY(-6px);
    }
}

/* ============= INPUT AREA ============= */

.input-area {
    padding: var(--space-4);
    background: var(--color-bg-primary);
    border-top: 1px solid var(--color-border);
}

.input-container {
    max-width: var(--max-chat-width);
    margin: 0 auto;
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: var(--space-2);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-2) var(--space-2) var(--space-2) var(--space-4);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input-wrapper:focus-within {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-light);
}

.input-field {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    font-family: inherit;
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    resize: none;
    min-height: 24px;
    max-height: 200px;
    line-height: var(--line-height-normal);
    padding: var(--space-2) 0;
}

.input-field::placeholder {
    color: var(--color-text-muted);
}

.input-actions {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

/* Send Button */
.btn-send {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent);
    border: none;
    border-radius: var(--radius-full);
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.btn-send:hover:not(:disabled) {
    background: var(--color-accent-hover);
    transform: scale(1.05);
}

.btn-send:disabled {
    background: var(--color-bg-tertiary);
    color: var(--color-text-muted);
    cursor: not-allowed;
}

.btn-send svg {
    width: 18px;
    height: 18px;
}

/* Input hint */
.input-hint {
    text-align: center;
    padding-top: var(--space-2);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* ============= EMPTY STATE ============= */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-12);
    text-align: center;
}

.empty-state-icon {
    width: 48px;
    height: 48px;
    color: var(--color-text-muted);
    margin-bottom: var(--space-4);
}

.empty-state-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.empty-state-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}