/**
 * AI Climb - Modern ChatGPT-Style Frontend Interface
 * Clean, minimal design for the chat interface
 */

:root {
    --chat-primary: #10a37f;
    --chat-primary-hover: #0d8a6a;
    --chat-primary-light: rgba(16, 163, 127, 0.1);
    --chat-bg: #ffffff;
    --chat-sidebar-bg: #f8f9fa;
    --chat-border: #e5e7eb;
    --chat-text: #1a1a1a;
    --chat-text-secondary: #6b7280;
    --chat-user-msg: #10a37f;
    --chat-assistant-msg: #f3f4f6;
    --chat-input-bg: #ffffff;
    --chat-hover: #f3f4f6;
    --chat-radius: 16px;
    --chat-radius-sm: 12px;
    --chat-radius-lg: 20px;
    --chat-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --chat-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --chat-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
    --chat-shadow-md: 0 8px 16px rgba(0, 0, 0, 0.1);
    --chat-shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.12);
    --chat-shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.15);
}

/* Dark mode variables */
.dark-mode {
    --chat-bg: #343541;
    --chat-sidebar-bg: #202123;
    --chat-border: #40414f;
    --chat-text: #ececf1;
    --chat-text-secondary: #c5c5d2;
    --chat-assistant-msg: #444654;
    --chat-input-bg: #40414f;
    --chat-hover: #2a2b32;
}

/* Reset and base styles */
.ai-climb-hub-shell * {
    box-sizing: border-box;
}

/* Main container */
.ai-climb-hub-shell {
    width: 100%;
    height: 100vh;
    max-height: 900px;
    background: var(--chat-bg);
    display: flex;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--chat-text);
    overflow: hidden;
    border-radius: var(--chat-radius-lg);
    box-shadow: var(--chat-shadow-xl);
    position: relative;
    animation: slideInUp 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Sidebar */
.ai-climb-hub-sidebar {
    width: 300px;
    background: var(--chat-sidebar-bg);
    border-right: 1px solid var(--chat-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.ai-climb-hub-sidebar::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 1px;
    height: 100%;
    background: linear-gradient(to bottom, transparent, var(--chat-border), transparent);
    opacity: 0.5;
}

.ai-climb-hub-sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--chat-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.ai-climb-hub-logo {
    font-size: 18px;
    font-weight: 700;
    color: var(--chat-text);
}

.ai-climb-new-chat-btn {
    background: linear-gradient(135deg, var(--chat-primary), var(--chat-primary-hover));
    border: none;
    color: white;
    padding: 10px 16px;
    border-radius: var(--chat-radius-sm);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--chat-transition);
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: var(--chat-shadow-sm);
    position: relative;
    overflow: hidden;
}

.ai-climb-new-chat-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.ai-climb-new-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--chat-shadow-md);
}

.ai-climb-new-chat-btn:hover::before {
    opacity: 1;
}

.ai-climb-new-chat-btn:active {
    transform: translateY(0);
    box-shadow: var(--chat-shadow-sm);
}

.ai-climb-sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.ai-climb-sidebar-section {
    margin-bottom: 24px;
}

.ai-climb-sidebar-label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--chat-text-secondary);
    padding: 8px 12px;
}

.ai-climb-assistant-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: var(--chat-radius-sm);
    cursor: pointer;
    transition: var(--chat-transition);
    border: 2px solid transparent;
    background: transparent;
    width: 100%;
    text-align: left;
    color: var(--chat-text);
    font-size: 14px;
    position: relative;
    overflow: hidden;
}

.ai-climb-assistant-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--chat-primary);
    transform: scaleY(0);
    transition: transform 0.3s;
}

.ai-climb-assistant-item:hover {
    background: var(--chat-hover);
    transform: translateX(4px);
    box-shadow: var(--chat-shadow-sm);
}

.ai-climb-assistant-item.active {
    background: var(--chat-primary-light);
    border-color: var(--chat-primary);
    font-weight: 600;
    box-shadow: var(--chat-shadow);
}

.ai-climb-assistant-item.active::before {
    transform: scaleY(1);
}

.ai-climb-assistant-icon {
    font-size: 20px;
}

.ai-climb-assistant-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ai-climb-conversation-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    border-radius: var(--chat-radius-sm);
    cursor: pointer;
    transition: var(--chat-transition);
    border: 2px solid transparent;
    background: transparent;
    width: 100%;
    text-align: left;
    color: var(--chat-text);
    font-size: 13px;
    position: relative;
    margin-bottom: 4px;
}

.ai-climb-conversation-item::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--chat-radius-sm);
    background: var(--chat-primary);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.ai-climb-conversation-item:hover {
    background: var(--chat-hover);
    transform: translateX(2px);
    box-shadow: var(--chat-shadow-sm);
}

.ai-climb-conversation-item.active {
    background: white;
    border-color: var(--chat-primary);
    font-weight: 600;
    box-shadow: var(--chat-shadow);
}

.ai-climb-conversation-item.active::after {
    opacity: 0.05;
}

.ai-climb-conversation-icon {
    font-size: 16px;
    color: var(--chat-text-secondary);
}

.ai-climb-conversation-text {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ai-climb-conversation-delete {
    opacity: 0;
    background: transparent;
    border: none;
    color: var(--chat-text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    font-size: 16px;
    transition: var(--chat-transition);
}

.ai-climb-conversation-item:hover .ai-climb-conversation-delete {
    opacity: 1;
}

.ai-climb-conversation-delete:hover {
    background: rgba(255, 0, 0, 0.1);
    color: #ff0000;
}

/* Main chat area */
.ai-climb-hub-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--chat-bg);
    overflow: hidden;
}

.ai-climb-hub-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--chat-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.ai-climb-hub-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--chat-text);
}

.ai-climb-hub-subtitle {
    font-size: 13px;
    color: var(--chat-text-secondary);
    margin-top: 2px;
}

/* Messages area */
.ai-climb-messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
}

.ai-climb-message {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    padding: 20px;
    border-radius: var(--chat-radius);
    max-width: 100%;
    animation: messageSlideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(15px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.ai-climb-message.user {
    background: linear-gradient(135deg, var(--chat-user-msg), var(--chat-primary-hover));
    align-self: flex-end;
    flex-direction: row-reverse;
    box-shadow: var(--chat-shadow);
    color: white;
}

.ai-climb-message.assistant {
    background: var(--chat-assistant-msg);
    box-shadow: var(--chat-shadow-sm);
    border: 1px solid var(--chat-border);
}

.ai-climb-message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
    box-shadow: var(--chat-shadow);
    position: relative;
    z-index: 1;
}

.ai-climb-message.user .ai-climb-message-avatar {
    background: rgba(255, 255, 255, 0.3);
    color: white;
    backdrop-filter: blur(10px);
}

.ai-climb-message.assistant .ai-climb-message-avatar {
    background: linear-gradient(135deg, var(--chat-primary), var(--chat-primary-hover));
    color: white;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: var(--chat-shadow), 0 0 0 0 rgba(16, 163, 127, 0.4);
    }
    50% {
        box-shadow: var(--chat-shadow), 0 0 0 8px rgba(16, 163, 127, 0);
    }
}

.ai-climb-message-content {
    flex: 1;
    line-height: 1.6;
    color: var(--chat-text);
    word-wrap: break-word;
}

.ai-climb-message-content p {
    margin: 0 0 12px 0;
}

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

.ai-climb-message-content code {
    background: rgba(0, 0, 0, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: "Courier New", monospace;
    font-size: 0.9em;
}

.ai-climb-message-content pre {
    background: rgba(0, 0, 0, 0.05);
    padding: 12px;
    border-radius: 6px;
    overflow-x: auto;
    margin: 8px 0;
}

.ai-climb-message-content pre code {
    background: none;
    padding: 0;
}

/* Empty state */
.ai-climb-empty-chat {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    text-align: center;
}

.ai-climb-empty-icon {
    font-size: 64px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.ai-climb-empty-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--chat-text);
    margin: 0 0 8px 0;
}

.ai-climb-empty-text {
    font-size: 14px;
    color: var(--chat-text-secondary);
    margin: 0 0 24px 0;
}

.ai-climb-suggestions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    max-width: 600px;
    margin-top: 24px;
}

.ai-climb-suggestion {
    background: var(--chat-hover);
    border: 1px solid var(--chat-border);
    padding: 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--chat-transition);
    text-align: left;
}

.ai-climb-suggestion:hover {
    background: var(--chat-border);
    transform: translateY(-2px);
}

.ai-climb-suggestion-title {
    font-weight: 600;
    font-size: 13px;
    margin-bottom: 4px;
}

.ai-climb-suggestion-text {
    font-size: 12px;
    color: var(--chat-text-secondary);
}

/* Input area */
.ai-climb-input-container {
    padding: 16px 24px 24px;
    border-top: 1px solid var(--chat-border);
}

.ai-climb-input-wrapper {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.ai-climb-input-form {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    background: var(--chat-input-bg);
    border: 2px solid var(--chat-border);
    border-radius: var(--chat-radius);
    padding: 14px;
    transition: var(--chat-transition);
    box-shadow: var(--chat-shadow-sm);
}

.ai-climb-input-form:focus-within {
    border-color: var(--chat-primary);
    box-shadow: var(--chat-shadow), 0 0 0 4px var(--chat-primary-light);
    transform: translateY(-2px);
}

.ai-climb-input-textarea {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    resize: none;
    font-size: 15px;
    line-height: 1.5;
    color: var(--chat-text);
    font-family: inherit;
    max-height: 200px;
    min-height: 24px;
}

.ai-climb-input-textarea::placeholder {
    color: var(--chat-text-secondary);
}

.ai-climb-send-button {
    background: linear-gradient(135deg, var(--chat-primary), var(--chat-primary-hover));
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: var(--chat-radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--chat-transition);
    flex-shrink: 0;
    box-shadow: var(--chat-shadow);
    position: relative;
    overflow: hidden;
}

.ai-climb-send-button::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle, rgba(255,255,255,0.3), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.ai-climb-send-button:hover:not(:disabled) {
    transform: scale(1.05);
    box-shadow: var(--chat-shadow-md);
}

.ai-climb-send-button:hover:not(:disabled)::before {
    opacity: 1;
}

.ai-climb-send-button:active:not(:disabled) {
    transform: scale(0.95);
}

.ai-climb-send-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.ai-climb-attach-button {
    background: transparent;
    border: none;
    color: var(--chat-text-secondary);
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--chat-transition);
}

.ai-climb-attach-button:hover {
    background: var(--chat-hover);
}

/* Typing indicator */
.ai-climb-typing {
    display: flex;
    gap: 16px;
    padding: 16px;
    background: var(--chat-assistant-msg);
    border-radius: var(--chat-radius);
    margin-bottom: 24px;
    box-shadow: var(--chat-shadow);
    animation: messageSlideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.ai-climb-typing-indicator {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ai-climb-typing-text {
    font-size: 13px;
    color: var(--chat-text-secondary);
    font-style: italic;
}

.ai-climb-typing-dots {
    display: flex;
    gap: 4px;
    align-items: center;
}

.ai-climb-typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--chat-text-secondary);
    animation: typing 1.4s infinite;
}

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

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

@keyframes typing {
    0%, 60%, 100% {
        opacity: 0.3;
        transform: scale(0.8);
    }
    30% {
        opacity: 1;
        transform: scale(1);
    }
}

/* Scrollbar styling */
.ai-climb-sidebar-content::-webkit-scrollbar,
.ai-climb-messages-container::-webkit-scrollbar {
    width: 6px;
}

.ai-climb-sidebar-content::-webkit-scrollbar-track,
.ai-climb-messages-container::-webkit-scrollbar-track {
    background: transparent;
}

.ai-climb-sidebar-content::-webkit-scrollbar-thumb,
.ai-climb-messages-container::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

.ai-climb-sidebar-content::-webkit-scrollbar-thumb:hover,
.ai-climb-messages-container::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.3);
}

/* Responsive design */
@media (max-width: 768px) {
    .ai-climb-hub-shell {
        flex-direction: column;
        max-height: none;
        height: auto;
        min-height: 100vh;
    }

    .ai-climb-hub-sidebar {
        width: 100%;
        max-height: 300px;
        border-right: none;
        border-bottom: 1px solid var(--chat-border);
    }

    .ai-climb-suggestions {
        grid-template-columns: 1fr;
    }

    .ai-climb-message {
        padding: 12px;
    }
}

/* Loading state */
.ai-climb-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.ai-climb-loader {
    width: 40px;
    height: 40px;
    border: 3px solid var(--chat-border);
    border-top-color: var(--chat-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ========================================
 * ATTACHMENT SYSTEM
 * ======================================== */

/* Attachment Preview (before sending) */
.ai-climb-attachment-preview-container {
    background: var(--chat-sidebar-bg);
    border: 1px solid var(--chat-border);
    border-radius: var(--chat-radius-sm);
    padding: 12px;
    margin-bottom: 12px;
    animation: slideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ai-climb-attachment-preview-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--chat-text);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.ai-climb-attachment-preview-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ai-climb-attachment-preview-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: var(--chat-bg);
    border: 1px solid var(--chat-border);
    border-radius: var(--chat-radius-sm);
    transition: var(--chat-transition);
}

.ai-climb-attachment-preview-item:hover {
    border-color: var(--chat-primary);
    background: var(--chat-primary-light);
}

.ai-climb-attachment-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.ai-climb-attachment-info {
    flex: 1;
    min-width: 0;
}

.ai-climb-attachment-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--chat-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ai-climb-attachment-meta {
    font-size: 12px;
    color: var(--chat-text-secondary);
    margin-top: 2px;
}

.ai-climb-attachment-remove {
    background: var(--chat-error);
    color: white;
    border: none;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    line-height: 1;
    transition: var(--chat-transition);
    flex-shrink: 0;
}

.ai-climb-attachment-remove:hover {
    background: #c53030;
    transform: scale(1.1);
}

/* Message Bubble Container (for content + attachments) */
.ai-climb-message-bubble {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

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

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

/* Attachments in Messages */
.ai-climb-message-attachments {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 100%;
}

.ai-climb-message-attachment {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--chat-radius-sm);
    transition: var(--chat-transition);
    cursor: pointer;
    max-width: 300px;
}

.ai-climb-message.user .ai-climb-message-attachment {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
}

.ai-climb-message-attachment:hover {
    background: rgba(255, 255, 255, 0.8);
    border-color: var(--chat-primary);
    transform: translateY(-2px);
    box-shadow: var(--chat-shadow-sm);
}

.ai-climb-message.user .ai-climb-message-attachment:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Adjust message content styling when in bubble */
.ai-climb-message-bubble .ai-climb-message-content {
    background: var(--chat-assistant-msg);
    padding: 12px 16px;
    border-radius: var(--chat-radius);
    box-shadow: var(--chat-shadow);
    max-width: 600px;
}

.ai-climb-message.user .ai-climb-message-bubble .ai-climb-message-content {
    background: linear-gradient(135deg, var(--chat-user-msg), var(--chat-primary-hover));
    color: white;
}

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

/* Error state */
.ai-climb-error {
    background: #fee;
    border: 1px solid #fcc;
    color: #c33;
    padding: 12px 16px;
    border-radius: 8px;
    margin: 12px 24px;
    font-size: 14px;
}

/* Success message */
.ai-climb-success {
    background: #efe;
    border: 1px solid #cfc;
    color: #3c3;
    padding: 12px 16px;
    border-radius: 8px;
    margin: 12px 24px;
    font-size: 14px;
}

/* Hide file input */
.ai-climb-file-input {
    display: none;
}

/* Footer note */
.ai-climb-footer-note {
    padding: 12px;
    font-size: 11px;
    color: var(--chat-text-secondary);
    text-align: center;
    border-top: 1px solid var(--chat-border);
}

/* Login prompt */
.ai-climb-login-prompt {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: 40px;
    text-align: center;
}

.ai-climb-login-title {
    font-size: 24px;
    font-weight: 600;
    margin: 0 0 12px 0;
}

.ai-climb-login-text {
    font-size: 14px;
    color: var(--chat-text-secondary);
    margin: 0 0 24px 0;
}

.ai-climb-login-button {
    background: var(--chat-primary);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--chat-transition);
}

.ai-climb-login-button:hover {
    background: var(--chat-primary-hover);
}