/* ============================================================
   NURTURELY — NURSERY MANAGEMENT PLATFORM
   Design System v1.0 | 2026 Edition
   Author: Nurturely Design System
   ============================================================ */

/* ============================================================
   IMPORT FONTS
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ============================================================
   DESIGN TOKENS — ROOT THEME (BLUE - DEFAULT)
   ============================================================ */
:root {
  /* ── PRIMARY SCALE ── */
  --color-primary-50:  hsl(200, 90%, 97%);
  --color-primary-100: hsl(200, 90%, 93%);
  --color-primary-200: hsl(200, 90%, 85%);
  --color-primary-300: hsl(200, 90%, 73%);
  --color-primary-400: hsl(200, 90%, 60%);
  --color-primary-500: hsl(200, 90%, 50%);
  --color-primary-600: hsl(200, 90%, 42%);
  --color-primary-700: hsl(200, 90%, 34%);
  --color-primary-800: hsl(200, 90%, 26%);
  --color-primary-900: hsl(200, 90%, 18%);

  /* ── SEMANTIC PRIMARY ── */
  --color-primary:         var(--color-primary-500);
  --color-primary-hover:   var(--color-primary-600);
  --color-primary-active:  var(--color-primary-700);
  --color-primary-subtle:  var(--color-primary-50);
  --color-primary-muted:   var(--color-primary-100);

  /* ── ACCENT SCALE (Violet) ── */
  --color-accent-50:  hsl(262, 83%, 97%);
  --color-accent-100: hsl(262, 83%, 93%);
  --color-accent-200: hsl(262, 83%, 85%);
  --color-accent-300: hsl(262, 83%, 73%);
  --color-accent-400: hsl(262, 83%, 62%);
  --color-accent-500: hsl(262, 83%, 54%);
  --color-accent-600: hsl(262, 83%, 44%);
  --color-accent-700: hsl(262, 83%, 36%);
  --color-accent-800: hsl(262, 83%, 28%);
  --color-accent-900: hsl(262, 83%, 18%);

  --color-accent:        var(--color-accent-500);
  --color-accent-hover:  var(--color-accent-600);
  --color-accent-subtle: var(--color-accent-50);

  /* ── SUCCESS (Emerald) ── */
  --color-success-50:  hsl(152, 81%, 96%);
  --color-success-100: hsl(152, 81%, 90%);
  --color-success-200: hsl(152, 81%, 78%);
  --color-success-300: hsl(152, 81%, 62%);
  --color-success-400: hsl(152, 81%, 48%);
  --color-success-500: hsl(152, 81%, 38%);
  --color-success-600: hsl(152, 81%, 30%);
  --color-success:        var(--color-success-500);
  --color-success-subtle: var(--color-success-50);

  /* ── WARNING (Amber) ── */
  --color-warning-50:  hsl(48, 96%, 96%);
  --color-warning-100: hsl(48, 96%, 88%);
  --color-warning-200: hsl(48, 96%, 74%);
  --color-warning-400: hsl(38, 92%, 52%);
  --color-warning-500: hsl(32, 95%, 44%);
  --color-warning:        var(--color-warning-400);
  --color-warning-subtle: var(--color-warning-50);

  /* ── DANGER (Red) ── */
  --color-danger-50:  hsl(0, 86%, 97%);
  --color-danger-100: hsl(0, 86%, 92%);
  --color-danger-400: hsl(0, 84%, 62%);
  --color-danger-500: hsl(0, 84%, 52%);
  --color-danger:        var(--color-danger-500);
  --color-danger-subtle: var(--color-danger-50);

  /* ── INFO (Cyan) ── */
  --color-info-50:  hsl(198, 93%, 96%);
  --color-info-500: hsl(198, 93%, 44%);
  --color-info:        var(--color-info-500);
  --color-info-subtle: var(--color-info-50);

  /* ── NEUTRAL SCALE ── */
  --color-neutral-0:   hsl(220, 20%, 100%);
  --color-neutral-50:  hsl(220, 20%, 98%);
  --color-neutral-100: hsl(220, 16%, 96%);
  --color-neutral-200: hsl(220, 14%, 92%);
  --color-neutral-300: hsl(220, 12%, 84%);
  --color-neutral-400: hsl(220, 10%, 68%);
  --color-neutral-500: hsl(220, 9%,  52%);
  --color-neutral-600: hsl(220, 11%, 38%);
  --color-neutral-700: hsl(220, 14%, 26%);
  --color-neutral-800: hsl(220, 18%, 18%);
  --color-neutral-900: hsl(220, 22%, 12%);
  --color-neutral-950: hsl(220, 30%, 7%);

  /* ── SURFACE TOKENS (LIGHT MODE) ── */
  --surface-bg:         var(--color-neutral-50);
  --surface-page:       var(--color-neutral-100);
  --surface-card:       var(--color-neutral-0);
  --surface-overlay:    rgba(255,255,255,0.85);
  --surface-glass:      rgba(255,255,255,0.60);
  --surface-hover:      var(--color-neutral-50);
  --surface-active:     var(--color-neutral-100);
  --surface-sidebar:    rgba(255, 255, 255, 0.55);
  --surface-nav:        rgba(255, 255, 255, 0.55);
  --border-glass:       rgba(255, 255, 255, 0.35);
  --surface-input:      var(--color-neutral-0);
  --surface-input-hover:var(--color-neutral-50);
  --surface-tooltip:    var(--color-neutral-900);
  --surface-dropdown:   var(--color-neutral-0);
  --surface-modal:      var(--color-neutral-0);

  /* ── BORDER TOKENS ── */
  --border-default:   var(--color-neutral-200);
  --border-strong:    var(--color-neutral-300);
  --border-subtle:    var(--color-neutral-100);
  --border-focus:     var(--color-primary);
  --border-error:     var(--color-danger);

  /* ── TEXT TOKENS ── */
  --text-primary:     var(--color-neutral-900);
  --text-secondary:   var(--color-neutral-600);
  --text-tertiary:    var(--color-neutral-500);
  --text-muted:       var(--color-neutral-400);
  --text-inverse:     var(--color-neutral-0);
  --text-link:        var(--color-primary);
  --text-error:       var(--color-danger);
  --text-success:     var(--color-success);

  /* ── ICON COLOR ── */
  --icon-primary:   var(--color-neutral-900);
  --icon-secondary: var(--color-neutral-500);
  --icon-muted:     var(--color-neutral-400);

  /* ── TYPOGRAPHY SCALE ── */
  --font-sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:  'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  --text-xs:   0.6875rem;  /* 11px */
  --text-sm:   0.8125rem;  /* 13px */
  --text-base: 0.9375rem;  /* 15px */
  --text-md:   1rem;       /* 16px */
  --text-lg:   1.125rem;   /* 18px */
  --text-xl:   1.25rem;    /* 20px */
  --text-2xl:  1.5rem;     /* 24px */
  --text-3xl:  1.875rem;   /* 30px */
  --text-4xl:  2.25rem;    /* 36px */
  --text-5xl:  3rem;       /* 48px */
  --text-6xl:  3.75rem;    /* 60px */

  --leading-tight:  1.25;
  --leading-snug:   1.375;
  --leading-normal: 1.5;
  --leading-relaxed:1.625;
  --leading-loose:  2;

  --tracking-tight:  -0.025em;
  --tracking-normal:  0em;
  --tracking-wide:    0.025em;
  --tracking-wider:   0.05em;
  --tracking-widest:  0.1em;

  --font-light:   300;
  --font-regular: 400;
  --font-medium:  500;
  --font-semi:    600;
  --font-bold:    700;
  --font-extra:   800;
  --font-black:   900;

  /* ── SPACING SYSTEM ── */
  --space-0:    0px;
  --space-px:   1px;
  --space-0-5:  2px;
  --space-1:    4px;
  --space-1-5:  6px;
  --space-2:    8px;
  --space-2-5:  10px;
  --space-3:    12px;
  --space-3-5:  14px;
  --space-4:    16px;
  --space-5:    20px;
  --space-6:    24px;
  --space-7:    28px;
  --space-8:    32px;
  --space-9:    36px;
  --space-10:   40px;
  --space-11:   44px;
  --space-12:   48px;
  --space-14:   56px;
  --space-16:   64px;
  --space-20:   80px;
  --space-24:   96px;
  --space-32:   128px;

  /* ── BORDER RADIUS SYSTEM ── */
  --radius-none: 0px;
  --radius-xs:   2px;
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   16px;
  --radius-2xl:  20px;
  --radius-3xl:  24px;
  --radius-4xl:  32px;
  --radius-full: 9999px;

  --radius-btn:    var(--radius-md);
  --radius-input:  var(--radius-md);
  --radius-card:   var(--radius-xl);
  --radius-modal:  var(--radius-2xl);
  --radius-badge:  var(--radius-full);
  --radius-avatar: var(--radius-full);
  --radius-chip:   var(--radius-full);

  /* ── SHADOW SYSTEM ── */
  --shadow-xs:  0 1px 2px 0 rgba(0,0,0,0.04);
  --shadow-sm:  0 1px 3px 0 rgba(0,0,0,0.06), 0 1px 2px -1px rgba(0,0,0,0.04);
  --shadow-md:  0 4px 6px -1px rgba(0,0,0,0.06), 0 2px 4px -2px rgba(0,0,0,0.04);
  --shadow-lg:  0 10px 15px -3px rgba(0,0,0,0.07), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl:  0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0,0,0,0.14);
  --shadow-inner: inset 0 2px 4px 0 rgba(0,0,0,0.04);
  --shadow-glow-primary: 0 0 0 3px hsl(217, 91%, 50%, 0.18);
  --shadow-glow-accent:  0 0 0 3px hsl(262, 83%, 54%, 0.18);
  --shadow-none: none;

  --shadow-card:   var(--shadow-sm);
  --shadow-card-hover: var(--shadow-lg);
  --shadow-modal:  var(--shadow-2xl);
  --shadow-dropdown: var(--shadow-xl);

  /* ── ANIMATION TIMING ── */
  --ease-default:  cubic-bezier(0.4, 0, 0.2, 1);
  --ease-in:       cubic-bezier(0.4, 0, 1, 1);
  --ease-out:      cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out:   cubic-bezier(0.4, 0, 0.6, 1);
  --ease-spring:   cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-bounce:   cubic-bezier(0.68, -0.55, 0.265, 1.55);

  --duration-instant: 50ms;
  --duration-fast:    100ms;
  --duration-normal:  200ms;
  --duration-medium:  300ms;
  --duration-slow:    400ms;
  --duration-slower:  600ms;
  --duration-slowest: 800ms;

  /* ── Z-INDEX SCALE ── */
  --z-below:   -1;
  --z-base:     0;
  --z-raised:   1;
  --z-dropdown: 100;
  --z-sticky:   200;
  --z-overlay:  300;
  --z-modal:    400;
  --z-toast:    500;
  --z-tooltip:  600;
  --z-cmd:      700;

  /* ── LAYOUT TOKENS ── */
  --sidebar-width:         260px;
  --sidebar-width-collapsed: 68px;
  --topnav-height:         60px;
  --content-max-width:     1400px;
  --content-padding:       var(--space-6);

  /* ── GRADIENTS ── */
  --gradient-primary:  var(--color-primary);
  --gradient-success:  var(--color-success);
  --gradient-warning:  var(--color-warning);
  --gradient-neutral:  var(--color-neutral-100);
  --gradient-surface:  var(--surface-card);
  --gradient-glow:     transparent;

  /* ── BLUR ── */
  --glass-blur-sm:  blur(8px);
  --glass-blur-md:  blur(16px);
  --glass-blur-lg:  blur(24px);
  --glass-blur-xl:  blur(40px);
  --backdrop-blur-sm: backdrop-filter: blur(8px);
}

/* ============================================================
   THEME PRESETS — DARK OCEAN BLUE
   ============================================================ */
[data-theme="dark-ocean"] {
  --color-primary-50:  hsl(200, 88%, 96%);
  --color-primary-100: hsl(200, 88%, 90%);
  --color-primary-200: hsl(200, 88%, 78%);
  --color-primary-300: hsl(200, 88%, 62%);
  --color-primary-400: hsl(200, 88%, 47%);
  --color-primary-500: hsl(200, 88%, 36%);
  --color-primary-600: hsl(200, 88%, 28%);
  --color-primary-700: hsl(200, 88%, 22%);
  --color-primary-800: hsl(200, 88%, 16%);
  --color-primary-900: hsl(200, 88%, 10%);
  --color-primary:         hsl(200, 88%, 36%);
  --color-primary-hover:   hsl(200, 88%, 28%);
  --color-primary-active:  hsl(200, 88%, 22%);
  --color-primary-subtle:  hsl(200, 88%, 96%);
  --color-primary-muted:   hsl(200, 88%, 90%);
  --color-accent:          hsl(187, 80%, 42%);
  --gradient-primary:      var(--color-primary);
  --shadow-glow-primary:   0 0 0 3px hsl(200, 88%, 36%, 0.22);
}

/* ============================================================
   THEME PRESETS — ROYAL BLUE (#0066ff)
   ============================================================ */
[data-theme="royal-blue"] {
  --color-primary-50:  hsl(216, 100%, 97%);
  --color-primary-100: hsl(216, 100%, 93%);
  --color-primary-200: hsl(216, 100%, 85%);
  --color-primary-300: hsl(216, 100%, 74%);
  --color-primary-400: hsl(216, 100%, 62%);
  --color-primary-500: hsl(216, 100%, 50%);
  --color-primary-600: hsl(216, 100%, 42%);
  --color-primary-700: hsl(216, 100%, 34%);
  --color-primary-800: hsl(216, 100%, 24%);
  --color-primary-900: hsl(216, 100%, 15%);
  --color-primary:         hsl(216, 100%, 50%);
  --color-primary-hover:   hsl(216, 100%, 42%);
  --color-primary-active:  hsl(216, 100%, 34%);
  --color-primary-subtle:  hsl(216, 100%, 97%);
  --color-primary-muted:   hsl(216, 100%, 93%);
  --color-accent:          hsl(198, 90%, 48%);
  --gradient-primary:      var(--color-primary);
  --shadow-glow-primary:   0 0 0 3px hsl(216, 100%, 50%, 0.22);
}

/* ============================================================
   THEME PRESETS — EMERALD
   ============================================================ */
[data-theme="emerald"] {
  --color-primary-50:  hsl(152, 81%, 96%);
  --color-primary-100: hsl(152, 81%, 90%);
  --color-primary-200: hsl(152, 81%, 78%);
  --color-primary-300: hsl(152, 81%, 62%);
  --color-primary-400: hsl(152, 81%, 48%);
  --color-primary-500: hsl(152, 81%, 38%);
  --color-primary-600: hsl(152, 81%, 30%);
  --color-primary-700: hsl(152, 81%, 24%);
  --color-primary-800: hsl(152, 81%, 18%);
  --color-primary-900: hsl(152, 81%, 12%);
  --color-primary:         hsl(152, 81%, 38%);
  --color-primary-hover:   hsl(152, 81%, 30%);
  --color-primary-active:  hsl(152, 81%, 24%);
  --color-primary-subtle:  hsl(152, 81%, 96%);
  --color-primary-muted:   hsl(152, 81%, 90%);
  --color-accent:          hsl(198, 93%, 44%);
  --gradient-primary:      var(--color-primary);
  --shadow-glow-primary:   0 0 0 3px hsl(152, 81%, 38%, 0.18);
}

/* ──── PURPLE (Violet) ──── */
[data-theme="purple"] {
  --color-primary-50:  hsl(270, 91%, 97%);
  --color-primary-100: hsl(270, 91%, 93%);
  --color-primary-200: hsl(270, 91%, 85%);
  --color-primary-300: hsl(270, 91%, 75%);
  --color-primary-400: hsl(270, 91%, 65%);
  --color-primary-500: hsl(270, 91%, 56%);
  --color-primary-600: hsl(270, 91%, 48%);
  --color-primary-700: hsl(270, 91%, 40%);
  --color-primary-800: hsl(270, 91%, 30%);
  --color-primary-900: hsl(270, 91%, 20%);
  --color-primary:         hsl(270, 91%, 56%);
  --color-primary-hover:   hsl(270, 91%, 48%);
  --color-primary-active:  hsl(270, 91%, 40%);
  --color-primary-subtle:  hsl(270, 91%, 97%);
  --color-primary-muted:   hsl(270, 91%, 93%);
  --color-accent:          hsl(316, 80%, 58%);
  --gradient-primary:      var(--color-primary);
  --shadow-glow-primary:   0 0 0 3px hsl(270, 91%, 56%, 0.18);
}

/* ──── ORANGE (Sunset) ──── */
[data-theme="orange"] {
  --color-primary-50:  hsl(25, 95%, 97%);
  --color-primary-100: hsl(25, 95%, 93%);
  --color-primary-200: hsl(25, 95%, 85%);
  --color-primary-300: hsl(25, 95%, 74%);
  --color-primary-400: hsl(25, 95%, 63%);
  --color-primary-500: hsl(25, 95%, 53%);
  --color-primary-600: hsl(25, 95%, 44%);
  --color-primary-700: hsl(25, 95%, 36%);
  --color-primary-800: hsl(25, 95%, 28%);
  --color-primary-900: hsl(25, 95%, 18%);
  --color-primary:         hsl(25, 95%, 53%);
  --color-primary-hover:   hsl(25, 95%, 44%);
  --color-primary-active:  hsl(25, 95%, 36%);
  --color-primary-subtle:  hsl(25, 95%, 97%);
  --color-primary-muted:   hsl(25, 95%, 93%);
  --color-accent:          hsl(350, 89%, 60%);
  --gradient-primary:      var(--color-primary);
  --shadow-glow-primary:   0 0 0 3px hsl(25, 95%, 53%, 0.18);
}

/* ──── MIDNIGHT ──── */
[data-theme="midnight"] {
  --color-primary-50:  hsl(217, 100%, 97%);
  --color-primary-100: hsl(217, 100%, 93%);
  --color-primary-200: hsl(217, 100%, 86%);
  --color-primary-300: hsl(217, 100%, 78%);
  --color-primary-400: hsl(217, 100%, 71%);
  --color-primary-500: hsl(217, 100%, 64%);
  --color-primary-600: hsl(217, 100%, 56%);
  --color-primary-700: hsl(217, 100%, 46%);
  --color-primary-800: hsl(217, 100%, 34%);
  --color-primary-900: hsl(217, 100%, 22%);
  --color-primary:         hsl(217, 100%, 64%);
  --color-primary-hover:   hsl(217, 100%, 56%);
  --color-primary-active:  hsl(217, 100%, 46%);
  --color-primary-subtle:  hsl(217, 100%, 97%);
  --color-primary-muted:   hsl(217, 100%, 93%);
  --color-accent:          hsl(280, 100%, 72%);
  --gradient-primary:      var(--color-primary);
  --shadow-glow-primary:   0 0 0 3px hsl(217, 100%, 64%, 0.22);
}

/* ──── CRIMSON (Deep Rose Red) ──── */
[data-theme="crimson"] {
  --color-primary-50:  hsl(348, 80%, 97%);
  --color-primary-100: hsl(348, 80%, 92%);
  --color-primary-200: hsl(348, 80%, 84%);
  --color-primary-300: hsl(348, 80%, 73%);
  --color-primary-400: hsl(348, 80%, 60%);
  --color-primary-500: hsl(348, 80%, 48%);
  --color-primary-600: hsl(348, 80%, 40%);
  --color-primary-700: hsl(348, 80%, 32%);
  --color-primary-800: hsl(348, 80%, 22%);
  --color-primary-900: hsl(348, 80%, 14%);
  --color-primary:         hsl(348, 80%, 48%);
  --color-primary-hover:   hsl(348, 80%, 40%);
  --color-primary-active:  hsl(348, 80%, 32%);
  --color-primary-subtle:  hsl(348, 80%, 97%);
  --color-primary-muted:   hsl(348, 80%, 92%);
  --color-accent:          hsl(24, 90%, 55%);
  --gradient-primary:      var(--color-primary);
  --shadow-glow-primary:   0 0 0 3px hsl(348, 80%, 48%, 0.20);
}

/* ──── INDIGO (Deep Blue-Violet) ──── */
[data-theme="indigo"] {
  --color-primary-50:  hsl(240, 75%, 97%);
  --color-primary-100: hsl(240, 75%, 93%);
  --color-primary-200: hsl(240, 75%, 86%);
  --color-primary-300: hsl(240, 75%, 76%);
  --color-primary-400: hsl(240, 75%, 65%);
  --color-primary-500: hsl(240, 75%, 52%);
  --color-primary-600: hsl(240, 75%, 44%);
  --color-primary-700: hsl(240, 75%, 36%);
  --color-primary-800: hsl(240, 75%, 26%);
  --color-primary-900: hsl(240, 75%, 16%);
  --color-primary:         hsl(240, 75%, 52%);
  --color-primary-hover:   hsl(240, 75%, 44%);
  --color-primary-active:  hsl(240, 75%, 36%);
  --color-primary-subtle:  hsl(240, 75%, 97%);
  --color-primary-muted:   hsl(240, 75%, 93%);
  --color-accent:          hsl(290, 70%, 58%);
  --gradient-primary:      var(--color-primary);
  --shadow-glow-primary:   0 0 0 3px hsl(240, 75%, 52%, 0.20);
}

/* ──── TEAL (Deep Cyan-Green) ──── */
[data-theme="teal"] {
  --color-primary-50:  hsl(175, 70%, 97%);
  --color-primary-100: hsl(175, 70%, 90%);
  --color-primary-200: hsl(175, 70%, 78%);
  --color-primary-300: hsl(175, 70%, 63%);
  --color-primary-400: hsl(175, 70%, 46%);
  --color-primary-500: hsl(175, 70%, 36%);
  --color-primary-600: hsl(175, 70%, 28%);
  --color-primary-700: hsl(175, 70%, 22%);
  --color-primary-800: hsl(175, 70%, 16%);
  --color-primary-900: hsl(175, 70%, 10%);
  --color-primary:         hsl(175, 70%, 36%);
  --color-primary-hover:   hsl(175, 70%, 28%);
  --color-primary-active:  hsl(175, 70%, 22%);
  --color-primary-subtle:  hsl(175, 70%, 97%);
  --color-primary-muted:   hsl(175, 70%, 90%);
  --color-accent:          hsl(42, 90%, 50%);
  --gradient-primary:      var(--color-primary);
  --shadow-glow-primary:   0 0 0 3px hsl(175, 70%, 36%, 0.22);
}

/* ──── COFFEE (Warm Dark Brown) ──── */
[data-theme="coffee"] {
  --color-primary-50:  hsl(20, 55%, 97%);
  --color-primary-100: hsl(20, 55%, 91%);
  --color-primary-200: hsl(20, 55%, 82%);
  --color-primary-300: hsl(20, 55%, 68%);
  --color-primary-400: hsl(20, 55%, 54%);
  --color-primary-500: hsl(20, 55%, 42%);
  --color-primary-600: hsl(20, 55%, 34%);
  --color-primary-700: hsl(20, 55%, 26%);
  --color-primary-800: hsl(20, 55%, 18%);
  --color-primary-900: hsl(20, 55%, 11%);
  --color-primary:         hsl(20, 55%, 42%);
  --color-primary-hover:   hsl(20, 55%, 34%);
  --color-primary-active:  hsl(20, 55%, 26%);
  --color-primary-subtle:  hsl(20, 55%, 97%);
  --color-primary-muted:   hsl(20, 55%, 91%);
  --color-accent:          hsl(42, 80%, 50%);
  --gradient-primary:      var(--color-primary);
  --shadow-glow-primary:   0 0 0 3px hsl(20, 55%, 42%, 0.22);
}

/* ============================================================
   DARK MODE OVERRIDES
   ============================================================ */
[data-mode="dark"] {
  --surface-bg:        hsl(220, 26%, 10%);
  --surface-page:      hsl(220, 22%, 8%);
  --surface-card:      hsl(220, 22%, 13%);
  --surface-overlay:   rgba(20,24,36,0.92);
  --surface-glass:     rgba(255,255,255,0.05);
  --surface-hover:     hsl(220, 22%, 15%);
  --surface-active:    hsl(220, 22%, 17%);
  --surface-sidebar:   rgba(20, 24, 36, 0.55);
  --surface-nav:       rgba(13, 17, 28, 0.55);
  --border-glass:      rgba(255, 255, 255, 0.08);
  --surface-input:     hsl(220, 22%, 15%);
  --surface-dropdown:  hsl(220, 22%, 13%);
  --surface-modal:     hsl(220, 22%, 13%);
  --surface-tooltip:   hsl(220, 22%, 20%);

  --border-default:    hsl(220, 18%, 22%);
  --border-strong:     hsl(220, 18%, 28%);
  --border-subtle:     hsl(220, 18%, 16%);

  --text-primary:      hsl(220, 20%, 95%);
  --text-secondary:    hsl(220, 14%, 68%);
  --text-tertiary:     hsl(220, 12%, 52%);
  --text-muted:        hsl(220, 10%, 40%);
  --text-inverse:      hsl(220, 22%, 10%);

  --icon-primary:      hsl(220, 20%, 88%);
  --icon-secondary:    hsl(220, 14%, 56%);
  --icon-muted:        hsl(220, 12%, 42%);

  --shadow-xs:  0 1px 2px 0 rgba(0,0,0,0.25);
  --shadow-sm:  0 1px 3px 0 rgba(0,0,0,0.30), 0 1px 2px -1px rgba(0,0,0,0.20);
  --shadow-md:  0 4px 6px -1px rgba(0,0,0,0.35), 0 2px 4px -2px rgba(0,0,0,0.25);
  --shadow-lg:  0 10px 15px -3px rgba(0,0,0,0.40), 0 4px 6px -4px rgba(0,0,0,0.30);
  --shadow-xl:  0 20px 25px -5px rgba(0,0,0,0.45), 0 8px 10px -6px rgba(0,0,0,0.35);
  --shadow-2xl: 0 25px 50px -12px rgba(0,0,0,0.60);
}

/* ============================================================
   BASE RESET & GLOBAL STYLES
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--font-regular);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--surface-bg);
  transition:
    background-color var(--duration-medium) var(--ease-default),
    color var(--duration-medium) var(--ease-default);
}

/* TYPOGRAPHY UTILITIES */
.text-xs     { font-size: var(--text-xs); }
.text-sm     { font-size: var(--text-sm); }
.text-base   { font-size: var(--text-base); }
.text-md     { font-size: var(--text-md); }
.text-lg     { font-size: var(--text-lg); }
.text-xl     { font-size: var(--text-xl); }
.text-2xl    { font-size: var(--text-2xl); }
.text-3xl    { font-size: var(--text-3xl); }
.font-light  { font-weight: var(--font-light); }
.font-regular{ font-weight: var(--font-regular); }
.font-medium { font-weight: var(--font-medium); }
.font-semi   { font-weight: var(--font-semi); }
.font-bold   { font-weight: var(--font-bold); }
.font-mono   { font-family: var(--font-mono); }

.text-primary   { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted     { color: var(--text-muted); }
.text-inverse   { color: var(--text-inverse); }
.text-accent    { color: var(--color-primary); }

/* LAYOUT UTILITIES */
.container {
  width: 100%;
  max-width: var(--content-max-width);
  margin-inline: auto;
  padding-inline: var(--content-padding);
}
.flex        { display: flex; }
.flex-col    { flex-direction: column; }
.items-center{ align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2  { gap: var(--space-2); }
.gap-3  { gap: var(--space-3); }
.gap-4  { gap: var(--space-4); }
.flex-1      { flex: 1; }
.grid { display: grid; }
.w-full  { width: 100%; }

/* CARDS */
.card {
  background: var(--surface-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card), inset 0 1px 0 0 rgba(255, 255, 255, 0.1);
  transition:
    box-shadow var(--duration-normal) var(--ease-spring),
    border-color var(--duration-normal) var(--ease-spring),
    transform var(--duration-normal) var(--ease-spring);
}
.card:hover {
  box-shadow: var(--shadow-card-hover), var(--shadow-glow-primary);
  border-color: var(--color-primary-300);
}
.card-interactive:hover { 
  transform: translateY(-4px) scale(1.01); 
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2-5) var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--duration-fast) var(--ease-default);
}
.btn-xs { padding: var(--space-1) var(--space-2-5); font-size: var(--text-xs); }
.btn-sm { padding: var(--space-1-5) var(--space-3); font-size: var(--text-sm); }
.btn-lg { padding: var(--space-3-5) var(--space-6); font-size: var(--text-md); }
.btn-primary { background-color: var(--color-primary); color: white; }
.btn-gradient { background: var(--gradient-primary); color: white; border: none; }
.btn-secondary { background-color: var(--surface-card); color: var(--text-primary); border-color: var(--border-default); }
.btn-ghost { background-color: transparent; color: var(--text-secondary); }
.btn-ghost:hover { background-color: var(--surface-hover); color: var(--text-primary); }
.btn-success-text {
  color: var(--color-success) !important;
}
.btn-success-text:hover {
  background-color: hsla(152, 81%, 38%, 0.1) !important;
}
.btn-success-text.active {
  background-color: var(--color-success) !important;
  color: white !important;
}
.btn-success-text.active:hover {
  background-color: var(--color-success-600) !important;
}
.btn-danger-text {
  color: var(--color-danger) !important;
}
.btn-danger-text:hover {
  background-color: hsla(0, 84%, 52%, 0.1) !important;
}
.btn-danger-text.active {
  background-color: var(--color-danger) !important;
  color: white !important;
}
.btn-danger-text.active:hover {
  background-color: var(--color-danger-600) !important;
}

/* INPUTS */
.input {
  width: 100%;
  padding: var(--space-2-5) var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  background-color: var(--surface-input);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-input);
  outline: none;
  transition: all var(--duration-fast) var(--ease-default);
}
.input:focus { border-color: var(--color-primary); box-shadow: var(--shadow-glow-primary); }

.input-float-wrapper { position: relative; }
.input-float { padding-top: var(--space-5); padding-bottom: var(--space-1-5); }
.input-float-label {
  position: absolute;
  top: 50%;
  left: var(--space-4);
  transform: translateY(-50%);
  font-size: var(--text-sm);
  color: var(--text-muted);
  pointer-events: none;
  transition: all var(--duration-fast) var(--ease-default);
}
.input-float:focus ~ .input-float-label,
.input-float:not(:placeholder-shown) ~ .input-float-label {
  top: var(--space-2);
  transform: none;
  font-size: var(--text-xs);
  color: var(--color-primary);
}

/* ── Input with Icon ── */
.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  pointer-events: none;
  z-index: 1;
}

.input-icon-left-pos {
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
}

.input-icon-right-pos {
  right: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
}

.input-icon-left  { padding-left: calc(var(--space-3) * 2 + 14px); }
.input-icon-right { padding-right: calc(var(--space-3) * 2 + 14px); }

/* ── Select Dropdown ── */
.select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238898aa' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  padding-right: calc(var(--space-3) * 2 + 12px);
  cursor: pointer;
  color: var(--text-primary);
}

/* BADGES */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-0-5) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-badge);
  border: 1px solid transparent;
}
.badge-primary  { background: var(--color-primary-subtle); color: var(--color-primary-600); border-color: var(--color-primary-100); }
.badge-success  { background: var(--color-success-subtle); color: var(--color-success-600); border-color: var(--color-success-100); }
.badge-warning  { background: var(--color-warning-subtle); color: hsl(32,95%,36%); border-color: var(--color-warning-100); }
.badge-danger   { background: var(--color-danger-subtle);  color: hsl(0,84%,44%); border-color: var(--color-danger-100); }
.badge-neutral  { background: var(--color-neutral-100); color: var(--text-secondary); border-color: var(--color-neutral-200); }
.badge-gradient { background: var(--gradient-primary); color: white; border: none; }
.badge-dot {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1-5);
}
.badge-dot::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: currentColor;
  opacity: 0.8;
}

/* AVATARS */
.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-avatar);
  font-weight: var(--font-semi);
  font-size: var(--text-sm);
  flex-shrink: 0;
  border: 2px solid var(--surface-card);
}
.avatar-xs { width: 24px; height: 24px; font-size: var(--text-xs); }
.avatar-sm { width: 32px; height: 32px; }
.avatar-md { width: 40px; height: 40px; }
.avatar-lg { width: 48px; height: 48px; }
.avatar-xl { width: 64px; height: 64px; }
.avatar-1  { background: hsl(200, 90%, 60%); color: white; }
.avatar-2  { background: hsl(152,81%,48%); color: white; }
.avatar-3  { background: hsl(25,95%,60%); color: white; }
.avatar-4  { background: hsl(270,91%,60%); color: white; }
.avatar-5  { background: hsl(38,92%,60%); color: white; }

/* TABLES */
.table-wrapper { overflow: auto; border-radius: var(--radius-xl); border: 1px solid var(--border-default); }
.table { width: 100%; border-collapse: collapse; font-size: var(--text-sm); }
.table thead { background: var(--surface-page); }
.table th { padding: var(--space-3) var(--space-4); font-size: var(--text-xs); text-transform: uppercase; color: var(--text-tertiary); text-align: left; }
.table td { padding: var(--space-3-5) var(--space-4); border-bottom: 1px solid var(--border-subtle); }
.table tbody tr:hover { background: var(--surface-hover); }

/* PROGRESS */
.progress { width: 100%; height: 6px; background: var(--color-neutral-200); border-radius: var(--radius-full); overflow: hidden; }
.progress-bar { height: 100%; background: var(--gradient-primary); border-radius: var(--radius-full); }

/* SIDEBAR & NAV */
.sidebar { position: fixed; top: 0; left: 0; bottom: 0; width: var(--sidebar-width); background: var(--surface-sidebar); backdrop-filter: var(--glass-blur-md); -webkit-backdrop-filter: var(--glass-blur-md); border-right: 1px solid var(--border-glass); display: flex; flex-direction: column; transition: width var(--duration-medium) var(--ease-spring); z-index: var(--z-sticky); overflow: hidden; }
.sidebar-logo { display: flex; align-items: center; gap: var(--space-3); padding: var(--space-5) var(--space-4); height: var(--topnav-height); border-bottom: 1px solid var(--border-default); flex-shrink: 0; }
.sidebar-nav { flex: 1; overflow-y: auto; padding: var(--space-3); }
.sidebar-section-label { font-size: var(--text-xs); font-weight: var(--font-semi); color: var(--text-muted); text-transform: uppercase; padding: var(--space-5) var(--space-3) var(--space-2); transition: opacity var(--duration-medium) var(--ease-default); }
.nav-item { display: flex; align-items: center; gap: var(--space-3); padding: var(--space-2-5) var(--space-3); border-radius: var(--radius-md); font-size: var(--text-sm); color: var(--text-secondary); text-decoration: none; transition: all var(--duration-normal) var(--ease-spring); white-space: nowrap; }
.nav-item:hover { background-color: var(--surface-hover); color: var(--text-primary); }
.nav-item.active { background-color: var(--color-primary-subtle); color: var(--color-primary); }
.nav-item-icon { width: 20px; height: 20px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.nav-item-label { overflow: hidden; text-overflow: ellipsis; transition: opacity var(--duration-medium) var(--ease-default), width var(--duration-medium) var(--ease-default); }
.nav-item-badge { margin-left: auto; background: var(--color-primary); color: white; font-size: 10px; border-radius: var(--radius-full); padding: 0 6px; transition: opacity var(--duration-medium) var(--ease-default); }
.sidebar-footer { border-top: 1px solid var(--border-default); padding: var(--space-3); flex-shrink: 0; }

/* SIDEBAR COLLAPSED STATE */
.sidebar.collapsed { width: var(--sidebar-width-collapsed); }
.sidebar.collapsed .sidebar-logo { justify-content: center; padding: var(--space-5) var(--space-2); }
.sidebar.collapsed .sidebar-logo > div:last-child { display: none; }
.sidebar.collapsed .sidebar-nav { padding: var(--space-3) var(--space-1-5); }
.sidebar.collapsed .sidebar-section-label { opacity: 0; height: 0; padding: 0; margin: 0; overflow: hidden; }
.sidebar.collapsed .nav-item { justify-content: center; padding: var(--space-2-5); }
.sidebar.collapsed .nav-item-label { opacity: 0; width: 0; overflow: hidden; }
.sidebar.collapsed .nav-item-badge { opacity: 0; width: 0; overflow: hidden; padding: 0; }
.sidebar.collapsed .sidebar-footer > * > div[style*="flex:1"],
.sidebar.collapsed .sidebar-footer > * > div:not(.avatar):not([class*="btn"]) { display: none; }
.sidebar.collapsed .sidebar-footer > * > button { display: none; }
.sidebar.collapsed #sidebar-toggle svg { transform: rotate(180deg); }

/* TOPNAV */
.topnav { position: sticky; top: 0; height: var(--topnav-height); background: var(--surface-nav); backdrop-filter: var(--glass-blur-lg); -webkit-backdrop-filter: var(--glass-blur-lg); border-bottom: 1px solid var(--border-glass); display: flex; align-items: center; gap: var(--space-4); padding: 0 var(--space-6); transition: background var(--duration-normal) var(--ease-default); }

/* MODALS */
.modal-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,0.45); backdrop-filter: blur(4px); display: flex; align-items: center; justify-content: center; z-index: var(--z-modal); }
.modal { background: var(--surface-modal); border: 1px solid var(--border-default); border-radius: var(--radius-modal); box-shadow: var(--shadow-modal); width: 100%; max-width: 560px; max-height: 90vh; overflow: auto; }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: var(--space-5) var(--space-6); border-bottom: 1px solid var(--border-default); }
.modal-body { padding: var(--space-6); }
.modal-footer { display: flex; align-items: center; justify-content: flex-end; gap: var(--space-3); padding: var(--space-4) var(--space-6); border-top: 1px solid var(--border-default); background: var(--surface-page); border-radius: 0 0 var(--radius-modal) var(--radius-modal); }

/* RESPONSIVE & BREAKPOINTS */
@media (max-width: 1024px) { :root { --sidebar-width: var(--sidebar-width-collapsed); } }
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); width: 260px !important; z-index: var(--z-modal); }
  .sidebar.mobile-open { transform: translateX(0); }
  #mobile-menu-btn { display: flex !important; }
  #sidebar-toggle { display: none !important; }
}

/* ============================================================
   PREMIUM MICRO-INTERACTION COMPONENTS
   ============================================================ */

/* ── Toast Notifications Stack ── */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  z-index: var(--z-toast);
  pointer-events: none;
}

.toast {
  background: var(--surface-tooltip);
  color: var(--text-inverse);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-lg);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  box-shadow: var(--shadow-xl);
  pointer-events: auto;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--duration-normal) var(--ease-spring), transform var(--duration-normal) var(--ease-spring);
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* ── Command Palette (Ctrl + K Overlay) ── */
.cmd-palette-backdrop {
  position: fixed;
  inset: 0;
  background: var(--surface-overlay);
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
  z-index: var(--z-cmd);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal);
}

.cmd-palette-backdrop.show {
  opacity: 1;
  pointer-events: auto;
}

.cmd-palette-modal {
  width: 100%;
  max-width: 500px;
  background: var(--surface-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  overflow: hidden;
  transform: scale(0.95);
  transition: transform var(--duration-normal) var(--ease-spring);
}

.cmd-palette-backdrop.show .cmd-palette-modal {
  transform: scale(1);
}

.cmd-palette-search {
  width: 100%;
  padding: var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--text-primary);
  background: transparent;
  border: none;
  outline: none;
  border-bottom: 1px solid var(--border-default);
}

.cmd-palette-results {
  max-height: 280px;
  overflow-y: auto;
  padding: var(--space-2);
}

.cmd-palette-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: background var(--duration-fast), color var(--duration-fast);
}

.cmd-palette-item:hover, .cmd-palette-item.active {
  background: var(--surface-hover);
  color: var(--text-primary);
}

/* ── Custom Tooltips ── */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::before {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%) scale(0.9);
  background: var(--surface-tooltip);
  color: var(--text-inverse);
  padding: var(--space-1-5) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  white-space: nowrap;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-fast), transform var(--duration-fast);
  z-index: var(--z-tooltip);
}

[data-tooltip]:hover::before {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}

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

::-webkit-scrollbar-track {
  background: var(--surface-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: var(--radius-full);
  border: 1px solid var(--surface-bg);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) var(--surface-bg);
}

/* ============================================================
   LAYOUT & TYPOGRAPHY UTILITIES
   ============================================================ */
.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-md { font-size: var(--text-md); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }

.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semi); }
.font-bold { font-weight: var(--font-bold); }

.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }

/* Table Sorting Indicators */
.sort-header {
  position: relative;
  user-select: none;
}
.sort-header::after {
  content: " ↕";
  opacity: 0.3;
  font-size: 0.8em;
  margin-left: var(--space-1);
  display: inline-block;
  transition: opacity var(--duration-fast);
}
.sort-header:hover::after {
  opacity: 0.7;
}
.sort-header.sort-asc::after {
  content: " ↑";
  opacity: 1;
  color: var(--color-primary);
}
.sort-header.sort-desc::after {
  content: " ↓";
  opacity: 1;
  color: var(--color-primary);
}

/* Pagination Controls */
.pagination-controls {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-default);
}
.pagination-info {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  font-weight: var(--font-medium);
}
.pagination-btn {
  background-color: var(--surface-card);
  color: var(--text-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--space-1) var(--space-2-5);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-default);
}
.pagination-btn:hover:not(:disabled) {
  background-color: var(--surface-hover);
  border-color: var(--border-strong);
}
.pagination-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Avatar Image Support */
.avatar img, img.avatar {
  width: 100%;
  height: 100%;
  border-radius: inherit;
  object-fit: cover;
}