/* PLANT ENGINEERING SYSTEMS — Design Tokens v2
   Palette: Deep teal #005A7C on white — inspired by foodplantengineering.com
   Professional, clean, industrial B2B. Light-first.
*/

:root,
[data-theme='light'] {
  /* Surfaces */
  --color-bg: #ffffff;
  --color-surface: #f7f9fa;
  --color-surface-2: #eef3f6;
  --color-surface-offset: #e4ecf0;
  --color-surface-dark: #003A5C;
  --color-divider: #d4dfe6;
  --color-border: #c5d4dc;

  /* Text */
  --color-text: #1a2e3a;
  --color-text-muted: #4a6272;
  --color-text-faint: #8aa4b2;
  --color-text-inverse: #ffffff;
  --color-text-on-dark: rgba(255,255,255,0.88);

  /* Primary — Deep Teal (brand) */
  --color-primary: #005A7C;
  --color-primary-hover: #004d6b;
  --color-primary-active: #003d56;
  --color-primary-light: #e0edf3;
  --color-primary-mid: #5BB8D4;

  /* Accent — Amber/Orange for CTAs and highlights */
  --color-accent: #E87722;
  --color-accent-hover: #d06510;
  --color-accent-active: #b85500;
  --color-accent-light: #fdf0e4;
  --color-accent-text: #ffffff;

  /* Steel blue for secondary elements */
  --color-steel: #3a7fa3;
  --color-steel-light: #dceef6;

  /* Status */
  --color-success: #1a6b3a;
  --color-success-light: #d4eddf;
  --color-warning: #92600a;
  --color-warning-light: #fef3c7;
  --color-error: #991b1b;
  --color-error-light: #fee2e2;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 450ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,58,92,0.08);
  --shadow-md: 0 4px 16px rgba(0,58,92,0.12);
  --shadow-lg: 0 12px 40px rgba(0,58,92,0.16);
  --shadow-xl: 0 24px 64px rgba(0,58,92,0.20);

  /* Content widths */
  --content-narrow: 680px;
  --content-default: 1000px;
  --content-wide: 1280px;

  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.2vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.82rem + 0.28vw, 0.9375rem);
  --text-base: clamp(1rem, 0.94rem + 0.28vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1rem + 0.6vw, 1.375rem);
  --text-xl: clamp(1.375rem, 1.1rem + 1.2vw, 2rem);
  --text-2xl: clamp(1.875rem, 1.2rem + 2.8vw, 3.25rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 4.5rem);
  --text-hero: clamp(2.75rem, 0.5rem + 6vw, 6rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Fonts */
  --font-display: 'Kanit', 'Helvetica Neue', sans-serif;
  --font-body: 'Nunito Sans', 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* Dark mode — kept but secondary; site defaults to light */
[data-theme='dark'] {
  --color-bg: #0d1e28;
  --color-surface: #112230;
  --color-surface-2: #162a38;
  --color-surface-offset: #1a3040;
  --color-surface-dark: #091520;
  --color-divider: #1e3448;
  --color-border: #264055;
  --color-text: #ddeaf2;
  --color-text-muted: #7aa4bc;
  --color-text-faint: #3d6880;
  --color-text-inverse: #0d1e28;
  --color-text-on-dark: rgba(255,255,255,0.88);
  --color-primary: #4fa8c8;
  --color-primary-hover: #6cbcda;
  --color-primary-active: #3890b0;
  --color-primary-light: #0e2a3a;
  --color-primary-mid: #5BB8D4;
  --color-accent: #f08c3a;
  --color-accent-hover: #f5a05a;
  --color-accent-active: #d07020;
  --color-accent-light: #2a1804;
  --color-accent-text: #0d1e28;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.45);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0d1e28;
    --color-surface: #112230;
    --color-surface-2: #162a38;
    --color-surface-offset: #1a3040;
    --color-divider: #1e3448;
    --color-border: #264055;
    --color-text: #ddeaf2;
    --color-text-muted: #7aa4bc;
    --color-primary: #4fa8c8;
    --color-primary-hover: #6cbcda;
    --color-primary-light: #0e2a3a;
    --color-accent: #f08c3a;
    --color-accent-hover: #f5a05a;
    --color-accent-light: #2a1804;
  }
}