/* ============================================================
   PermitIQ CFO Operating Model — Design System
   Professional finance aesthetic. Clean. Dense. No AI vibes.
   ============================================================ */

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

/* --- Design Tokens --- */
:root {
  /* Colors — Professional Finance Palette */
  --color-white: #FFFFFF;
  --color-bg-primary: #FFFFFF;
  --color-bg-secondary: #F9FAFB;
  --color-bg-tertiary: #F3F4F6;
  --color-bg-hover: #F0F1F3;
  --color-bg-sidebar: #1B1F2A;
  --color-bg-sidebar-hover: #252A37;
  --color-bg-sidebar-active: #2E3444;

  --color-border: #E5E7EB;
  --color-border-strong: #D1D5DB;
  --color-border-light: #F0F0F0;

  --color-text-primary: #1A1A2E;
  --color-text-secondary: #6B7280;
  --color-text-tertiary: #9CA3AF;
  --color-text-inverse: #FFFFFF;
  --color-text-sidebar: #C5CAD3;
  --color-text-sidebar-active: #FFFFFF;

  --color-primary: #2563EB;
  --color-primary-hover: #1D4ED8;
  --color-primary-light: #EFF6FF;
  --color-primary-bg: #DBEAFE;

  --color-positive: #16A34A;
  --color-positive-bg: #F0FDF4;
  --color-negative: #DC2626;
  --color-negative-bg: #FEF2F2;
  --color-warning: #D97706;
  --color-warning-bg: #FFFBEB;
  --color-info: #2563EB;
  --color-info-bg: #EFF6FF;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Cascadia Code', 'Consolas', monospace;

  --text-xs: 0.6875rem;    /* 11px */
  --text-sm: 0.75rem;      /* 12px */
  --text-base: 0.8125rem;  /* 13px */
  --text-md: 0.875rem;     /* 14px */
  --text-lg: 1rem;         /* 16px */
  --text-xl: 1.25rem;      /* 20px */
  --text-2xl: 1.5rem;      /* 24px */
  --text-3xl: 1.875rem;    /* 30px */

  --weight-light: 300;
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  --leading-tight: 1.2;
  --leading-normal: 1.5;
  --leading-relaxed: 1.65;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;

  /* Layout */
  --sidebar-width: 240px;
  --sidebar-collapsed: 56px;
  --header-height: 48px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  /* Shadows — subtle, professional */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-lg: 0 4px 6px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.04);

  /* Transitions — functional only */
  --transition-fast: 120ms ease;
  --transition-normal: 200ms ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-regular);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  overflow: hidden;
  height: 100vh;
}

/* --- App Layout --- */
.app-layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* --- Sidebar --- */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  height: 100vh;
  background: var(--color-bg-sidebar);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-right: 1px solid rgba(255,255,255,0.06);
}

.sidebar-header {
  padding: var(--space-4) var(--space-4);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: var(--header-height);
}

.sidebar-logo {
  font-size: var(--text-md);
  font-weight: var(--weight-bold);
  color: var(--color-text-inverse);
  letter-spacing: -0.02em;
}

.sidebar-logo span {
  color: var(--color-primary);
}

.sidebar-subtitle {
  font-size: var(--text-xs);
  color: var(--color-text-sidebar);
  font-weight: var(--weight-regular);
  margin-top: 2px;
  opacity: 0.7;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-2) 0;
}

.sidebar-nav::-webkit-scrollbar {
  width: 4px;
}
.sidebar-nav::-webkit-scrollbar-track {
  background: transparent;
}
.sidebar-nav::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.15);
  border-radius: 4px;
}

.nav-group {
  margin-bottom: var(--space-1);
}

.nav-group-label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: rgba(255,255,255,0.35);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--space-3) var(--space-4) var(--space-1);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-sidebar);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  border-left: 3px solid transparent;
  user-select: none;
}

.nav-item:hover {
  background: var(--color-bg-sidebar-hover);
  color: var(--color-text-sidebar-active);
}

.nav-item.active {
  background: var(--color-bg-sidebar-active);
  color: var(--color-text-sidebar-active);
  border-left-color: var(--color-primary);
  font-weight: var(--weight-medium);
}

.nav-item-number {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: rgba(255,255,255,0.3);
  min-width: 20px;
}

.nav-item.active .nav-item-number {
  color: var(--color-primary);
}

/* --- Main Content --- */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

.content-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  min-height: var(--header-height);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-primary);
}

.content-header-title {
  font-size: var(--text-md);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
}

.content-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.content-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-6);
  background: var(--color-bg-secondary);
}

.content-body::-webkit-scrollbar {
  width: 6px;
}
.content-body::-webkit-scrollbar-track {
  background: transparent;
}
.content-body::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: 4px;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
}

.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); }

.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }
.text-positive { color: var(--color-positive); }
.text-negative { color: var(--color-negative); }
.text-warning { color: var(--color-warning); }
.text-mono { font-family: var(--font-mono); }
.text-right { text-align: right; }
.text-center { text-align: center; }

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

/* --- Utility --- */
.hidden { display: none !important; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.w-full { width: 100%; }