Update LSP colors for better visibility and clarity

Refine diagnostic colors to use fluorescent tones for errors,
warnings, and hints, enhancing visibility in the editor.

lua/paper-tonic-modern/colors.lua

@@ -72,25 +72,28 @@ M.fg_weaker = {'#bbbbbb', 251, 'gray'}        -- Lightest text (very subtle)
 M.fg_exception = {'#7c4444', 251, 'gray'}
 
 -- ============================================================================
--- Status Foreground Colors
+-- Status Foreground Colors (Git/Diff - muted natural tones)
 -- ============================================================================
 
 -- Git/diff status indicators (used in statusline, signs, etc.)
-M.success = {'#89af89', 196, 'white'}    -- Success/addition (green)
-M.modified = {'#8989af', 196, 'white'}   -- Modified/change (blue)
-M.fail = {'#af8989', 196, 'white'}       -- Fail/deletion (red)
+-- These are muted, natural colors for git changes
+M.success = {'#89af89', 196, 'white'}    -- Success/addition (muted green)
+M.modified = {'#8989af', 196, 'white'}   -- Modified/change (muted blue)
+M.fail = {'#af8989', 196, 'white'}       -- Fail/deletion (muted red)
 
 -- ============================================================================
--- Alert/Diagnostic Colors
+-- Alert/Diagnostic Colors (Fluorescent/Neon - intentionally jarring)
 -- ============================================================================
 
--- Alert colors (errors, warnings - red/orange scale)
-M.alert_strong = {'#d70000', 124, 'darkred'}  -- Strong error (bright red)
-M.alert = {'#d75f00', 196, 'red'}             -- Normal alert (orange-red)
-M.alert_weak = {'#000000', 203, 'red'}        -- Weak alert (black - used for text)
+-- These colors are designed to be NOTICED, not blend in with code
+-- Fluorescent/neon aesthetic similar to bg_hl_special_alt colors
+-- Think "highlighter marker" - bright, synthetic, stands out on white paper
 
--- Question/info color (black - for prompts, info messages)
-M.question = {'#000000', 0, 'black'}
+-- LSP Diagnostics - Fluorescent colors for maximum visibility
+M.diag_error = {'#ff0066', 197, 'red'}        -- Hot pink-red (screams "error!")
+M.diag_warn = {'#ff6600', 202, 'red'}         -- Fluorescent orange (warnings)
+M.diag_info = {'#00ccff', 45, 'cyan'}         -- Bright fluorescent cyan (info - more prominent)
+M.diag_hint = {'#66e0ff', 81, 'cyan'}         -- Softer fluorescent cyan (hint - less prominent)
 
 -- ============================================================================
 -- Primary Accent Colors (brownish-red tones)

lua/paper-tonic-modern/groups/lsp.lua

@@ -8,33 +8,33 @@ return {
   -- LSP Diagnostics
   -- ============================================================================
   
-  -- Error diagnostics (red)
-  DiagnosticError = { fg = c.alert_strong },  -- Bright red #d70000
-  DiagnosticUnderlineError = { sp = c.alert_strong, undercurl = true },
-  DiagnosticSignError = { fg = c.alert_strong, bg = c.bg },
-  DiagnosticFloatingError = { fg = c.alert_strong },
-  DiagnosticVirtualTextError = { fg = c.alert_strong },  -- No background
+  -- Error diagnostics (fluorescent hot pink)
+  DiagnosticError = { fg = c.diag_error },  -- Hot pink #ff0066
+  DiagnosticUnderlineError = { sp = c.diag_error, undercurl = true },
+  DiagnosticSignError = { fg = c.diag_error, bg = c.bg },
+  DiagnosticFloatingError = { fg = c.diag_error },
+  DiagnosticVirtualTextError = { fg = c.diag_error },  -- No background
   
-  -- Warning diagnostics (orange)
-  DiagnosticWarn = { fg = c.alert },  -- Orange-red #d75f00
-  DiagnosticUnderlineWarn = { sp = c.alert, undercurl = true },
-  DiagnosticSignWarn = { fg = c.alert, bg = c.bg },
-  DiagnosticFloatingWarn = { fg = c.alert },
-  DiagnosticVirtualTextWarn = { fg = c.alert },  -- No background
+  -- Warning diagnostics (fluorescent orange)
+  DiagnosticWarn = { fg = c.diag_warn },  -- Fluorescent orange #ff6600
+  DiagnosticUnderlineWarn = { sp = c.diag_warn, undercurl = true },
+  DiagnosticSignWarn = { fg = c.diag_warn, bg = c.bg },
+  DiagnosticFloatingWarn = { fg = c.diag_warn },
+  DiagnosticVirtualTextWarn = { fg = c.diag_warn },  -- No background
   
-  -- Info diagnostics (blue)
-  DiagnosticInfo = { fg = c.modified },  -- Blue #8989af
-  DiagnosticUnderlineInfo = { sp = c.modified, underline = true },
-  DiagnosticSignInfo = { fg = c.modified, bg = c.bg },
-  DiagnosticFloatingInfo = { fg = c.modified },
-  DiagnosticVirtualTextInfo = { fg = c.modified },  -- No background
+  -- Info diagnostics (bright fluorescent cyan)
+  DiagnosticInfo = { fg = c.diag_info },  -- Bright cyan #00ccff
+  DiagnosticUnderlineInfo = { sp = c.diag_info, underline = true },
+  DiagnosticSignInfo = { fg = c.diag_info, bg = c.bg },
+  DiagnosticFloatingInfo = { fg = c.diag_info },
+  DiagnosticVirtualTextInfo = { fg = c.diag_info },  -- No background
   
-  -- Hint diagnostics (green)
-  DiagnosticHint = { fg = c.success },  -- Green #89af89
-  DiagnosticUnderlineHint = { sp = c.success, underline = true },
-  DiagnosticSignHint = { fg = c.success, bg = c.bg },
-  DiagnosticFloatingHint = { fg = c.success },
-  DiagnosticVirtualTextHint = { fg = c.success },  -- No background
+  -- Hint diagnostics (softer fluorescent cyan)
+  DiagnosticHint = { fg = c.diag_hint },  -- Soft cyan #66e0ff
+  DiagnosticUnderlineHint = { sp = c.diag_hint, underline = true },
+  DiagnosticSignHint = { fg = c.diag_hint, bg = c.bg },
+  DiagnosticFloatingHint = { fg = c.diag_hint },
+  DiagnosticVirtualTextHint = { fg = c.diag_hint },  -- No background
   
   -- ============================================================================
   -- LSP References (document highlight)