Stirling-PDF/frontend/src/styles/theme.css

/* CSS variables for Tailwind + Mantine integration */

:root {
  /* Standard gray scale */
  --gray-50: 249 250 251;
  --gray-100: 243 244 246;
  --gray-200: 229 231 235;
  --gray-300: 209 213 219;
  --gray-400: 156 163 175;
  --gray-500: 107 114 128;
  --gray-600: 75 85 99;
  --gray-700: 55 65 81;
  --gray-800: 31 41 55;
  --gray-900: 17 24 39;

  /* Semantic colors for Tailwind */
  --surface: 255 255 255;
  --background: 249 250 251;
  --border: 229 231 235;

  /* Colors for Mantine integration */
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-400: #60a5fa;
  --color-primary-500: #3b82f6;
  --color-primary-600: #2563eb;
  --color-primary-700: #1d4ed8;
  --color-primary-800: #1e40af;
  --color-primary-900: #1e3a8a;

  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Spacing system */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;

  /* Radius system */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Shadow system */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);

  /* Font weights */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Light theme semantic colors */
  --bg-surface: #ffffff;
  --bg-raised: #f9fafb;
  --bg-muted: #f3f4f6;
  --bg-background: #f9fafb;
  --bg-toolbar: #ffffff;
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-muted: #6b7280;
  --border-subtle: #e5e7eb;
  --border-default: #d1d5db;
  --border-strong: #9ca3af;
  --hover-bg: #f9fafb;
  --active-bg: #f3f4f6;

  /* Icon colors for light mode */
  --icon-user-bg: #9CA3AF;
  --icon-user-color: #FFFFFF;
  --icon-notifications-bg: #9CA3AF;
  --icon-notifications-color: #FFFFFF;
  --icon-tools-bg: #1E88E5;
  --icon-tools-color: #FFFFFF;
  --icon-read-bg: #4CAF50;
  --icon-read-color: #FFFFFF;
  --icon-sign-bg: #3BA99C;
  --icon-sign-color: #FFFFFF;
  --icon-automate-bg: #A576E3;
  --icon-automate-color: #FFFFFF;
  --icon-files-bg: #D3E7F7;
  --icon-files-color: #0A8BFF;
  --icon-activity-bg: #D3E7F7;
  --icon-activity-color: #0A8BFF;
  --icon-config-bg: #9CA3AF;
  --icon-config-color: #FFFFFF;

  /* Colors for tooltips */
  --tooltip-title-bg: #DBEFFF;
  --tooltip-title-color: #31528E;
  --tooltip-header-bg: #31528E;
  --tooltip-header-color: white;
  --tooltip-border: var(--border-default);

  /* Inactive icon colors for light mode */
  --icon-inactive-bg: #9CA3AF;
  --icon-inactive-color: #FFFFFF;

  --accent-interactive: #4A90E2;
  --text-instruction: #4A90E2;
  --text-brand: var(--color-gray-700);
  --text-brand-accent: #DC2626;

  /* container */
  --landing-paper-bg: var(--bg-surface);
  --landing-inner-paper-bg: #EEF8FF;
  --landing-inner-paper-border: #CDEAFF;
  --landing-button-bg: var(--bg-surface);
  --landing-button-color: var(--icon-tools-bg);
  --landing-button-border: #E0F2F7;
  --landing-button-hover-bg: rgb(251, 251, 251);

  /* drop state */
  --landing-drop-paper-bg: #E3F2FD;
  --landing-drop-inner-paper-bg: #BBDEFB;
  --landing-drop-inner-paper-border: #90CAF9;

  /* shadows */
  --drop-shadow-color: rgba(0, 0, 0, 0.08);
  --drop-shadow-color-strong: rgba(0, 0, 0, 0.04);
  --drop-shadow-filter: drop-shadow(0 0.2rem 0.4rem rgba(0, 0, 0, 0.08)) drop-shadow(0 0.6rem 0.6rem rgba(0, 0, 0, 0.06)) drop-shadow(0 1.2rem 1rem rgba(0, 0, 0, 0.04));
}

[data-mantine-color-scheme="dark"] {
  /* Dark theme gray scale (inverted) */
  --gray-50: 17 24 39;
  --gray-100: 31 35 41;
  --gray-200: 42 47 54;
  --gray-300: 55 65 81;
  --gray-400: 75 85 99;
  --gray-500: 107 114 128;
  --gray-600: 156 163 175;
  --gray-700: 209 213 219;
  --gray-800: 229 231 235;
  --gray-900: 243 244 246;

  /* Dark semantic colors for Tailwind */
  --surface: 31 35 41;
  --background: 42 47 54;
  --border: 55 65 81;

  /* Dark theme Mantine colors */
  --color-gray-50: #111827;
  --color-gray-100: #1F2329;
  --color-gray-200: #2A2F36;
  --color-gray-300: #374151;
  --color-gray-400: #4b5563;
  --color-gray-500: #6b7280;
  --color-gray-600: #9ca3af;
  --color-gray-700: #d1d5db;
  --color-gray-800: #e5e7eb;
  --color-gray-900: #f3f4f6;

  /* Dark theme semantic colors */
  --bg-surface: #2A2F36;
  --bg-raised: #1F2329;
  --bg-muted: #1F2329;
  --bg-background: #2A2F36;
  --bg-toolbar: #272A2E;
  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --text-muted: #9ca3af;
  --border-subtle: #2A2F36;
  --border-default: #374151;
  --border-strong: #4b5563;
  --hover-bg: #374151;
  --active-bg: #4b5563;

  /* Icon colors for dark mode */
  --icon-user-bg: #2A2F36;
  --icon-user-color: #6E7581;
  --icon-notifications-bg: #2A2F36;
  --icon-notifications-color: #6E7581;
  --icon-tools-bg: #4B525A;
  --icon-tools-color: #EAEAEA;
  --icon-read-bg: #4B525A;
  --icon-read-color: #EAEAEA;
  --icon-sign-bg: #4B525A;
  --icon-sign-color: #EAEAEA;
  --icon-automate-bg: #4B525A;
  --icon-automate-color: #EAEAEA;
  --icon-files-bg: #4B525A;
  --icon-files-color: #EAEAEA;
  --icon-activity-bg: #4B525A;
  --icon-activity-color: #EAEAEA;
  --icon-config-bg: #4B525A;
  --icon-config-color: #EAEAEA;

  /* Inactive icon colors for dark mode */
  --icon-inactive-bg: #2A2F36;
  --icon-inactive-color: #6E7581;

  /* Dark mode tooltip colors */
  --tooltip-title-bg: #4B525A;
  --tooltip-title-color: #fff;
  --tooltip-header-bg: var(--bg-raised);
  --tooltip-header-color: var(--text-primary);
  --tooltip-border: var(--border-default);

  --accent-interactive: #ffffff;
  --text-instruction: #ffffff;
  --text-brand: var(--color-gray-800);
  --text-brand-accent: #EF4444;

  /* container */
  --landing-paper-bg: #171A1F;
  --landing-inner-paper-bg: var(--bg-raised);
  --landing-inner-paper-border: #2D3237;
  --landing-button-bg: #2B3037;
  --landing-button-color: #ffffff;
  --landing-button-border: #2D3237;
  --landing-button-hover-bg: #4c525b;

  /* drop state */
  --landing-drop-paper-bg: #1A2332;
  --landing-drop-inner-paper-bg: #2A3441;
  --landing-drop-inner-paper-border: #3A4451;

  /* shadows */
  --drop-shadow-color: rgba(255, 255, 255, 0.08);
  --drop-shadow-color-strong: rgba(255, 255, 255, 0.04);
  --drop-shadow-filter: drop-shadow(0 0.2rem 0.4rem rgba(200, 200, 200, 0.08)) drop-shadow(0 0.6rem 0.6rem rgba(200, 200, 200, 0.06)) drop-shadow(0 1.2rem 1rem rgba(200, 200, 200, 0.04));

  /* Adjust shadows for dark mode */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.4);
}

/* Dropzone drop state styling */
[data-accept] .dropzone-inner {
  background-color: var(--landing-drop-inner-paper-bg) !important;
  border-color: var(--landing-drop-inner-paper-border) !important;
}

/* Smooth transitions for theme switching */
* {
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}