/* ==========================================================================
   KALLISTO OS - REUSABLE WHITE-LABEL DESIGN TOKENS
   Modular, Minimal, Multi-Tenant Design System for UK Small Businesses
   ========================================================================== */

:root {
  /* Default Brand Identity (Kallisto Executive Amber / International Orange) */
  --brand-primary: #ff5d00;
  --brand-primary-hover: #e65300;
  --brand-primary-light: rgba(255, 93, 0, 0.08);
  --brand-primary-border: rgba(255, 93, 0, 0.25);
  
  /* Neutral Canvas & Surfaces */
  --surface-bg: #f8fafc;
  --surface-card: #ffffff;
  --surface-card-hover: #f1f5f9;
  --surface-card-elevated: #ffffff;
  --surface-sidebar: #0f172a;
  --surface-sidebar-hover: #1e293b;
  --surface-sidebar-active: #334155;
  
  /* Semantic High-Contrast Typography */
  --text-primary: #0f172a;     /* Slate 900 (>12:1 contrast) */
  --text-secondary: #334155;   /* Slate 700 (>8:1 contrast) */
  --text-muted: #64748b;       /* Slate 500 (>4.8:1 contrast) */
  --text-inverse: #f8fafc;
  --text-inverse-muted: #94a3b8;
  
  /* Status & Operational Indicators */
  --status-success: #10b981;
  --status-success-bg: #ecfdf5;
  --status-success-text: #065f46;
  --status-warning: #f59e0b;
  --status-warning-bg: #fffbeb;
  --status-warning-text: #92400e;
  --status-danger: #ef4444;
  --status-danger-bg: #fef2f2;
  --status-danger-text: #991b1b;
  --status-info: #0284c7;
  --status-info-bg: #f0f9ff;
  --status-info-text: #075985;
  
  /* Optical Meniscus & Borders */
  --border-subtle: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-focus: var(--brand-primary);
  
  /* Shadows & Elevation */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.08), 0 1px 2px -1px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.08);
  --shadow-card: inset 0 1px 1px 0 rgba(255, 255, 255, 0.9), 0 1px 3px rgba(15, 23, 42, 0.06), 0 10px 24px -8px rgba(15, 23, 42, 0.04);
  
  /* Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;
  
  /* Typography Scale */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  
  /* Layout Dimensions */
  --sidebar-width: 260px;
  --sidebar-collapsed-width: 72px;
  --header-height: 64px;
  --content-max-width: 1440px;
}

/* ==========================================================================
   CLIENT PRESET THEMES (WHITE-LABEL CUSTOMIZATION)
   ========================================================================== */

/* 1. Cafe & Hospitality Preset: "Bloom & Roast Espresso" */
[data-client-theme="cafe"] {
  --brand-primary: #b45309;          /* Rich Amber Roasted Bean */
  --brand-primary-hover: #92400e;
  --brand-primary-light: rgba(180, 83, 9, 0.08);
  --brand-primary-border: rgba(180, 83, 9, 0.25);
  --surface-bg: #faf7f2;             /* Creamy warm linen canvas */
  --surface-card: #ffffff;
  --surface-sidebar: #1c1917;        /* Warm dark roasted stone */
  --surface-sidebar-hover: #292524;
  --surface-sidebar-active: #44403c;
}

/* 2. Boutique Retail Preset: "The Harrogate Studio" */
[data-client-theme="retail"] {
  --brand-primary: #0284c7;          /* Cobalt Indigo Artisan Dye */
  --brand-primary-hover: #0369a1;
  --brand-primary-light: rgba(2, 132, 199, 0.08);
  --brand-primary-border: rgba(2, 132, 199, 0.25);
  --surface-bg: #f8fafc;
  --surface-card: #ffffff;
  --surface-sidebar: #090d16;        /* Deep obsidian retail slate */
  --surface-sidebar-hover: #131b2e;
  --surface-sidebar-active: #1e293b;
}

/* 3. Professional Advisory & Services Preset: "Soho Growth Partners" */
[data-client-theme="services"] {
  --brand-primary: #4f46e5;          /* Electric Indigo */
  --brand-primary-hover: #4338ca;
  --brand-primary-light: rgba(79, 70, 229, 0.08);
  --brand-primary-border: rgba(79, 70, 229, 0.25);
  --surface-bg: #f5f7fa;
  --surface-card: #ffffff;
  --surface-sidebar: #0f172a;
  --surface-sidebar-hover: #1e293b;
  --surface-sidebar-active: #312e81;
}

/* 4. Gym & Fitness Preset: "Apex Athletic Club" */
[data-client-theme="fitness"] {
  --brand-primary: #84cc16;          /* Electric Lime */
  --brand-primary-hover: #65a30d;
  --brand-primary-light: rgba(132, 204, 22, 0.12);
  --brand-primary-border: rgba(132, 204, 22, 0.35);
  --surface-bg: #f4f4f5;
  --surface-card: #ffffff;
  --surface-sidebar: #09090b;        /* Charcoal Obsidian */
  --surface-sidebar-hover: #18181b;
  --surface-sidebar-active: #27272a;
}

/* 5. Hair & Beauty Salon Preset: "Aura Aesthetics & Spa" */
[data-client-theme="salon"] {
  --brand-primary: #e11d48;          /* Rose Quartz / Luxury Berry */
  --brand-primary-hover: #be123c;
  --brand-primary-light: rgba(225, 29, 72, 0.08);
  --brand-primary-border: rgba(225, 29, 72, 0.25);
  --surface-bg: #fff5f6;             /* Warm Champagne Blush */
  --surface-card: #ffffff;
  --surface-sidebar: #190a14;        /* Deep Amethyst Plum */
  --surface-sidebar-hover: #291423;
  --surface-sidebar-active: #3e1e35;
}

/* 6. Trade Services & Engineering Preset: "Vanguard Electrical & Heating" */
[data-client-theme="trades"] {
  --brand-primary: #d97706;          /* High-Vis Industrial Amber */
  --brand-primary-hover: #b45309;
  --brand-primary-light: rgba(217, 119, 6, 0.08);
  --brand-primary-border: rgba(217, 119, 6, 0.3);
  --surface-bg: #f1f5f9;
  --surface-card: #ffffff;
  --surface-sidebar: #0f172a;        /* Tough Technical Gunmetal */
  --surface-sidebar-hover: #1e293b;
  --surface-sidebar-active: #334155;
}