/**
 * GigFinanceHub Design System
 * Premium Financial Tools for Gig Workers
 * Version: 1.0.0
 */

/* ============================================
   CSS VARIABLES - COLOR PALETTE
   ============================================ */
:root {
  /* Primary Colors */
  --color-primary-blue: #2563eb;
  --color-primary-blue-dark: #1e40af;
  --color-primary-blue-light: #3b82f6;

  --color-primary-green: #10b981;
  --color-primary-green-dark: #059669;
  --color-primary-green-light: #34d399;

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

  /* Semantic Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #2563eb 0%, #10b981 100%);
  --gradient-dark: linear-gradient(135deg, #1e40af 0%, #059669 100%);
  --gradient-light: linear-gradient(135deg, #3b82f6 0%, #34d399 100%);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Roboto Mono', 'Courier New', monospace;

  /* Font Sizes */
  --text-xs: 0.75rem;
  /* 12px */
  --text-sm: 0.875rem;
  /* 14px */
  --text-base: 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 */

  /* Spacing */
  --space-1: 0.25rem;
  /* 4px */
  --space-2: 0.5rem;
  /* 8px */
  --space-3: 0.75rem;
  /* 12px */
  --space-4: 1rem;
  /* 16px */
  --space-5: 1.25rem;
  /* 20px */
  --space-6: 1.5rem;
  /* 24px */
  --space-8: 2rem;
  /* 32px */
  --space-10: 2.5rem;
  /* 40px */
  --space-12: 3rem;
  /* 48px */

  /* Border Radius */
  --radius-sm: 0.375rem;
  /* 6px */
  --radius-md: 0.5rem;
  /* 8px */
  --radius-lg: 0.75rem;
  /* 12px */
  --radius-xl: 1rem;
  /* 16px */
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-neutral-800);
  background-color: var(--color-neutral-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-4);
  color: var(--color-neutral-900);
}

h1 {
  font-size: var(--text-4xl);
}

h2 {
  font-size: var(--text-3xl);
}

h3 {
  font-size: var(--text-2xl);
}

h4 {
  font-size: var(--text-xl);
}

h5 {
  font-size: var(--text-lg);
}

h6 {
  font-size: var(--text-base);
}

p {
  margin-bottom: var(--space-4);
}

a {
  color: var(--color-primary-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-blue-dark);
}

/* ============================================
   CONTAINER & LAYOUT
   ============================================ */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.container-sm {
  max-width: 800px;
}

/* ============================================
   CARDS
   ============================================ */
.card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-6);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-header {
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 2px solid var(--color-neutral-100);
}

.card-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-2);
}

.card-subtitle {
  font-size: var(--text-sm);
  color: var(--color-neutral-600);
  font-weight: 400;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  font-family: var(--font-primary);
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  opacity: 0.95;
}

.btn-secondary {
  background: white;
  color: var(--color-primary-blue);
  border: 2px solid var(--color-primary-blue);
}

.btn-secondary:hover {
  background: var(--color-primary-blue);
  color: white;
}

.btn-success {
  background: var(--color-success);
  color: white;
}

.btn-success:hover {
  background: var(--color-primary-green-dark);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ============================================
   FORM ELEMENTS
   ============================================ */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-neutral-700);
  margin-bottom: var(--space-2);
}

.form-input,
.form-select {
  width: 100%;
  /* padding: var(--space-3) var(--space-4); */
  font-size: var(--text-base);
  font-family: var(--font-primary);
  border: 2px solid var(--color-neutral-200);
  border-radius: var(--radius-md);
  background: white;
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary-blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input::placeholder {
  color: var(--color-neutral-400);
}

.form-help {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-neutral-500);
  margin-top: var(--space-1);
}

.form-error {
  color: var(--color-error);
}

/* ============================================
   RESULTS & OUTPUT
   ============================================ */
.result-box {
  background: var(--gradient-primary);
  color: white;
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  text-align: center;
  margin: var(--space-6) 0;
  box-shadow: var(--shadow-lg);
}

.result-label {
  font-size: var(--text-sm);
  font-weight: 500;
  opacity: 0.9;
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.result-value {
  font-size: var(--text-4xl);
  font-weight: 700;
  font-family: var(--font-mono);
}

.result-breakdown {
  background: white;
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-top: var(--space-4);
}

.result-row {
  display: flex;
  justify-content: space-between;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-neutral-100);
}

.result-row:last-child {
  border-bottom: none;
  font-weight: 700;
  font-size: var(--text-lg);
}

/* ============================================
   BADGES & TAGS
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-primary {
  background: var(--color-primary-blue);
  color: white;
}

.badge-success {
  background: var(--color-success);
  color: white;
}

.badge-warning {
  background: var(--color-warning);
  color: white;
}

/* ============================================
   ALERTS
   ============================================ */
.alert {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
  border-left: 4px solid;
}

.alert-info {
  background: rgba(59, 130, 246, 0.1);
  border-color: var(--color-info);
  color: var(--color-neutral-800);
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border-color: var(--color-success);
  color: var(--color-neutral-800);
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border-color: var(--color-warning);
  color: var(--color-neutral-800);
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--color-error);
  color: var(--color-neutral-800);
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.mt-0 {
  margin-top: 0;
}

.mt-4 {
  margin-top: var(--space-4);
}

.mt-6 {
  margin-top: var(--space-6);
}

.mt-8 {
  margin-top: var(--space-8);
}

.mb-0 {
  margin-bottom: 0;
}

.mb-4 {
  margin-bottom: var(--space-4);
}

.mb-6 {
  margin-bottom: var(--space-6);
}

.mb-8 {
  margin-bottom: var(--space-8);
}

.hidden {
  display: none;
}

.block {
  display: block;
}

.flex {
  display: flex;
}

.grid {
  display: grid;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in {
  animation: fadeIn var(--transition-base) ease-out;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.7;
  }
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
  :root {
    --text-4xl: 1.875rem;
    /* 30px */
    --text-3xl: 1.5rem;
    /* 24px */
    --text-2xl: 1.25rem;
    /* 20px */
  }

  .card {
    padding: var(--space-4);
  }

  .result-value {
    font-size: var(--text-3xl);
  }

  .btn-lg {
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-base);
  }
}

/* ============================================
   DARK MODE SUPPORT (Optional)
   ============================================ */
/* ============================================
   MOBILE RESETS & OVERRIDES
   ============================================ */
/* Prevent font scaling in landscape mode */
html {
  -webkit-text-size-adjust: 100%;
  /* Force light mode rendering to prevent OS dark mode overrides */
  color-scheme: light;
}

/* Force Card Background & Text on Mobile to be White/Dark */
@media (max-width: 768px) {

  .card,
  .tool-card {
    background-color: #ffffff !important;
    color: var(--color-neutral-900) !important;
  }

  body {
    background-color: var(--color-neutral-50) !important;
    color: var(--color-neutral-900) !important;
  }
}