@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --bg-base: #09090b; /* zinc-950 */
    --bg-surface: #18181b; /* zinc-900 */
    --bg-surface-hover: #27272a; /* zinc-800 */
    --text-primary: #fafafa; /* zinc-50 */
    --text-secondary: #a1a1aa; /* zinc-400 */
    --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --accent-color: #6366f1;
    --border-color: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(24, 24, 27, 0.65);
    --glass-border: rgba(255, 255, 255, 0.08);
}

html, body {
    height: 100%;
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    overflow: hidden;
    background-color: var(--bg-base);
    color: var(--text-primary);
}

.app-container {
    height: 100vh;
    height: 100dvh;
    background: 
        radial-gradient(circle at top right, rgba(79, 70, 229, 0.15), transparent 50%),
        radial-gradient(circle at bottom left, rgba(14, 165, 233, 0.15), transparent 50%),
        radial-gradient(circle at center, rgba(139, 92, 246, 0.05), transparent 50%),
        var(--bg-base);
    background-attachment: fixed;
}

/* Glassmorphic Utilities */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-right: 1px solid var(--glass-border);
}

/* Sidebar Styling */
.sidebar {
    width: 280px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 10;
    overflow: hidden;
    white-space: nowrap;
}

.sidebar.collapsed {
    width: 0 !important;
    padding: 0 !important;
    border: none !important;
    opacity: 0;
}

.new-chat-btn {
    background: var(--accent-gradient);
    border: none;
    color: white;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.new-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

.chat-history-item-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-radius: 0.75rem;
    margin-bottom: 0.4rem;
    transition: all 0.2s;
    cursor: pointer;
    color: var(--text-secondary);
    border: 1px solid transparent;
}

.chat-history-item-container:hover {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
}

.chat-history-item-container.active {
    background-color: rgba(99, 102, 241, 0.1);
    border-color: rgba(99, 102, 241, 0.3);
    color: var(--text-primary);
    font-weight: 500;
}

.chat-history-title {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 0.875rem;
    flex-grow: 1;
    margin-right: 10px;
}

.chat-actions {
    display: flex;
    gap: 0.25rem;
    opacity: 0.3;
    transition: opacity 0.2s ease;
}

.chat-history-item-container:hover .chat-actions {
    opacity: 1;
}

.chat-action-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    border-radius: 0.375rem;
    padding: 0.25rem 0.4rem;
    font-size: 0.9rem;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-action-btn:hover {
    background-color: var(--bg-surface);
    color: var(--text-primary);
    transform: scale(1.1);
}

.chat-action-btn.text-danger:hover {
    color: #ef4444 !important;
    background-color: rgba(239, 68, 68, 0.1);
}

.chat-delete-btn {
    color: var(--text-secondary);
    border: none;
    background: none;
    padding: 0;
    font-size: 1rem;
    opacity: 0;
    transition: opacity 0.2s, color 0.2s;
}

.chat-history-item-container:hover .chat-delete-btn {
    opacity: 1;
}

.chat-delete-btn:hover {
    color: #ef4444;
}

.sidebar-action-btn {
    background: transparent;
    color: var(--text-secondary);
    border: none;
    transition: all 0.2s;
}

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

/* Chat Box */
.chat-box {
    display: flex;
    flex-direction: column;
    scroll-behavior: smooth;
    padding-bottom: 6rem !important;
    -webkit-overflow-scrolling: touch;
}

/* Header */
.header {
    background: transparent;
    border-bottom: 1px solid var(--border-color);
}

.header-btn {
    background: var(--bg-surface);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    transition: all 0.2s;
}

.header-btn:hover {
    background: var(--bg-surface-hover);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Bubble UI Message Styling */
.message-wrapper {
    display: flex;
    flex-direction: column;
    width: 100%;
    padding: 0.75rem 2rem;
    animation: slideUpFade 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

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

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

.message-wrapper.bot {
    align-items: flex-start;
}

.message-content {
    max-width: 85%;
    display: flex;
    gap: 1rem;
    align-items: flex-end;
}

.message-wrapper.user .message-content {
    flex-direction: row-reverse;
}

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.avatar.user {
    display: none; /* Hide user avatar for cleaner bubbles */
}

.avatar.bot {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: #0ea5e9;
    margin-bottom: 0.25rem;
}

.message {
    padding: 1rem 1.25rem;
    word-wrap: break-word;
    font-size: 1.05rem;
    line-height: 1.6;
    color: var(--text-primary);
    border-radius: 1.25rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.message-wrapper.user .message {
    background: var(--accent-gradient);
    border-bottom-right-radius: 0.25rem;
    color: white;
}

.message-wrapper.bot .message {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-bottom-left-radius: 0.25rem;
}

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

/* Markdown styles */
.message pre {
    background-color: var(--bg-base);
    color: #e2e8f0;
    padding: 1rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    overflow-x: auto;
    max-width: 100%;
    margin-top: 1rem;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.code-block-wrapper {
    position: relative;
    max-width: 100%;
}

.copy-code-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    font-size: 0.75rem;
    opacity: 0;
    transition: opacity 0.2s;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
}

.code-block-wrapper:hover .copy-code-btn {
    opacity: 1;
}

.copy-code-btn:hover {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
}

/* File Attachments */
.attachment-chip {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 0.3rem 0.8rem;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    color: var(--text-secondary);
}

.attachment-chip .btn-close {
    filter: invert(1);
    font-size: 0.6rem;
    margin-left: 0.5rem;
}

.img-preview {
    max-height: 200px;
    max-width: 100%;
    border-radius: 0.5rem;
    margin-top: 0.5rem;
    border: 1px solid var(--border-color);
}

.message.bot code {
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 0.875em;
    background-color: rgba(255, 255, 255, 0.1);
    padding: 0.2em 0.4em;
    border-radius: 0.25rem;
    color: #a78bfa;
}

.message.bot pre code {
    background-color: transparent;
    padding: 0;
    color: inherit;
}

.message.bot p {
    margin-bottom: 0.75rem;
}

/* Input Area (Floating Glass Pill) */
.input-area {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem;
    background: linear-gradient(to top, var(--bg-base) 60%, transparent);
    z-index: 20;
}

.input-wrapper {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255,255,255,0.05) inset;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.input-wrapper:focus-within {
    border-color: rgba(99, 102, 241, 0.5);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(99, 102, 241, 0.2) inset, 0 0 20px rgba(99, 102, 241, 0.15);
}

.attach-btn {
    color: var(--text-secondary);
}
.attach-btn:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

#messageInput {
    color: var(--text-primary);
}

#messageInput::placeholder {
    color: var(--text-secondary);
}

.send-btn {
    background: var(--accent-gradient);
    box-shadow: 0 4px 10px rgba(99, 102, 241, 0.3);
}
.send-btn i {
    color: white !important;
}

.resize-none {
    resize: none;
    overflow-y: hidden;
}

.transition-btn {
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}
.transition-btn:hover {
    transform: scale(1.05);
}
.transition-btn:active {
    transform: scale(0.95);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    align-items: center;
    padding: 0.5rem 0;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--accent-gradient);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out both;
}

.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% { transform: scale(0); opacity: 0.4; }
    40% { transform: scale(1); opacity: 1; }
}

.max-w-lg {
    max-width: 800px;
}

/* Glowing text utility */
.text-gradient {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glow-icon {
    filter: drop-shadow(0 0 8px rgba(52, 211, 153, 0.6));
}

/* Modal Dark Theme */
.modal-content {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}
.modal-header {
    border-bottom-color: var(--border-color);
}
.modal-footer {
    border-top-color: var(--border-color);
}
.form-select {
    background-color: var(--bg-base);
    color: var(--text-primary);
    border-color: var(--border-color);
}
.form-select:focus {
    background-color: var(--bg-base);
    color: var(--text-primary);
    border-color: var(--accent-color);
    box-shadow: 0 0 0 0.25rem rgba(99, 102, 241, 0.25);
}
.btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

/* Mobile Sidebar Toggle & UX */
@media (max-width: 768px) {
    .sidebar {
        position: absolute;
        z-index: 1040;
        height: 100%;
        transform: translateX(-100%);
        background: rgba(9, 9, 11, 0.95);
        backdrop-filter: blur(20px);
    }
    .sidebar.show {
        transform: translateX(0);
        box-shadow: 4px 0 25px rgba(0,0,0,0.5);
    }
}

.sidebar-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1030;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.sidebar-overlay.show {
    opacity: 1;
    visibility: visible;
}

@media (max-width: 576px) {
    .suggestion-card {
        padding: 0.6rem;
    }
    .suggestion-card p {
        font-size: 0.75rem;
    }
    .header {
        padding-left: 0.5rem !important;
        padding-right: 0.5rem !important;
        gap: 0.25rem !important;
    }
    .header-btn {
        padding: 0.35rem 0.5rem !important;
        font-size: 0.8rem !important;
    }
    .message-wrapper {
        padding: 0.75rem 0.5rem !important;
    }
    .message {
        padding: 0.75rem 1rem;
        font-size: 0.95rem;
        border-radius: 1rem;
    }
    .header .dropdown .btn {
        font-size: 0.75rem !important;
        padding: 0.35rem 0.5rem !important;
        max-width: 140px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    .header .dropdown .btn span.bg-success {
        width: 16px !important;
        height: 16px !important;
    }
    .header .dropdown .btn i.bi-robot {
        font-size: 0.7rem !important;
    }
    .input-area {
        padding: 0.75rem;
        padding-bottom: calc(0.75rem + env(safe-area-inset-bottom));
    }
    .input-wrapper {
        border-radius: 1rem;
    }
    .chat-box {
        padding-bottom: 6rem !important;
    }
}

/* Suggestion Cards */
.suggestion-card {
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.85rem;
    padding: 0.85rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    height: 100%;
    backdrop-filter: blur(10px);
}

.suggestion-card:hover {
    background: var(--bg-surface-hover);
    border-color: rgba(99, 102, 241, 0.4);
    transform: translateY(-4px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3), 0 0 15px rgba(99, 102, 241, 0.15);
}

.suggestion-card p {
    font-size: 0.85rem;
    line-height: 1.4;
}

/* Workspace Layout Constraints */
.workspace-area { display: flex; width: 100%; height: 100%; min-height: 0; overflow: hidden; }
.chat-section { flex: 1; transition: width 0.3s ease; min-width: 0; min-height: 0; display: flex; flex-direction: column; }
.canvas-section { flex: 1; border-left: 1px solid rgba(255,255,255,0.1); display: flex; flex-direction: column; min-width: 0; min-height: 0; }
.canvas-section.d-none { display: none !important; }
.canvas-body { flex: 1; overflow-y: auto !important; min-height: 0; padding-bottom: 2rem !important; }

/* Modern Canvas Styling */
.canvas-section {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(30, 41, 59, 0.95)) !important;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: -10px 0 30px rgba(0,0,0,0.5);
    border-left: 1px solid rgba(255, 255, 255, 0.05);
    z-index: 10;
}

.canvas-header {
    background: rgba(0, 0, 0, 0.4) !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05) !important;
}

#canvasTitle {
    background: linear-gradient(90deg, #a855f7, #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
    letter-spacing: 0.5px;
}

#canvasEditor {
    color: #e2e8f0;
    font-family: 'Inter', system-ui, sans-serif;
    line-height: 1.8;
    font-size: 0.95rem;
    padding: 1rem;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.03);
    transition: background 0.3s ease;
}

#canvasEditor:focus {
    background: rgba(255, 255, 255, 0.04);
    outline: none;
}

/* Custom Scrollbar for Canvas Body */
.canvas-body::-webkit-scrollbar {
    width: 8px;
}
.canvas-body::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
}
.canvas-body::-webkit-scrollbar-thumb {
    background: rgba(168, 85, 247, 0.5);
    border-radius: 4px;
}
.canvas-body::-webkit-scrollbar-thumb:hover {
    background: rgba(168, 85, 247, 0.8);
}