/* ===================================
   Design System - Atlassian Inspired
   =================================== */

/* ===================================
   Design Tokens
   =================================== */
:root {
  /* Colors */
  --color-primary: #0052CC;
  --color-primary-hover: #0747A6;
  --color-primary-light: #DEEBFF;
  --color-success: #36B37E;
  --color-success-hover: #00875A;
  --color-warning: #FF5630;
  --color-warning-hover: #DE350B;
  --color-danger: #FF5630;
  --color-danger-hover: #DE350B;
  --color-neutral: #42526E;
  --color-neutral-light: #F4F5F7;
  --color-text-primary: #172B4D;
  --color-text-secondary: #6B778C;
  --color-text-disabled: #A5ADBA;
  --color-border: #DFE1E6;
  --color-border-focus: #4C9AFF;
  --color-background: #FFFFFF;
  --color-background-secondary: #F4F5F7;
  --color-background-tertiary: #FAFBFC;

  /* Spacing */
  --spacing-0: 0;
  --spacing-1: 0.25rem;  /* 4px */
  --spacing-2: 0.5rem;   /* 8px */
  --spacing-3: 0.75rem;  /* 12px */
  --spacing-4: 1rem;     /* 16px */
  --spacing-5: 1.25rem;  /* 20px */
  --spacing-6: 1.5rem;   /* 24px */
  --spacing-8: 2rem;     /* 32px */
  --spacing-10: 2.5rem;  /* 40px */
  --spacing-12: 3rem;    /* 48px */
  --spacing-16: 4rem;    /* 64px */
  --spacing-20: 5rem;    /* 80px */
  --spacing-24: 6rem;    /* 96px */

  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */
  --font-size-5xl: 3rem;      /* 48px */
  --font-size-6xl: 3.75rem;   /* 60px */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Border Radius */
  --border-radius-none: 0;
  --border-radius-sm: 0.125rem;  /* 2px */
  --border-radius-base: 0.25rem; /* 4px */
  --border-radius-md: 0.375rem;  /* 6px */
  --border-radius-lg: 0.5rem;    /* 8px */
  --border-radius-xl: 0.75rem;   /* 12px */
  --border-radius-2xl: 1rem;     /* 16px */
  --border-radius-full: 9999px;

  /* Shadows */
  --shadow-none: none;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --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 ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* ===================================
   Base Styles
   =================================== */
* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-background);
}

/* ===================================
   Typography
   =================================== */
.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }
.text-4xl { font-size: var(--font-size-4xl); }
.text-5xl { font-size: var(--font-size-5xl); }
.text-6xl { font-size: var(--font-size-6xl); }

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

.leading-tight { line-height: var(--line-height-tight); }
.leading-normal { line-height: var(--line-height-normal); }
.leading-relaxed { line-height: var(--line-height-relaxed); }

/* ===================================
   Button Component
   =================================== */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-4);
  border: 1px solid transparent;
  border-radius: var(--border-radius-base);
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-tight);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-base);
  user-select: none;
  white-space: nowrap;
}

.button:focus {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

.button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Button Variants */
.button--primary {
  background-color: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.button--primary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.button--secondary {
  background-color: var(--color-background);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.button--secondary:hover:not(:disabled) {
  background-color: var(--color-background-secondary);
  border-color: var(--color-text-secondary);
}

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

.button--success:hover:not(:disabled) {
  background-color: var(--color-success-hover);
  border-color: var(--color-success-hover);
}

.button--danger {
  background-color: var(--color-danger);
  color: white;
  border-color: var(--color-danger);
}

.button--danger:hover:not(:disabled) {
  background-color: var(--color-danger-hover);
  border-color: var(--color-danger-hover);
}

/* Button Sizes */
.button--small {
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--font-size-sm);
}

.button--large {
  padding: var(--spacing-4) var(--spacing-6);
  font-size: var(--font-size-lg);
}

.button--xlarge {
  padding: var(--spacing-5) var(--spacing-8);
  font-size: var(--font-size-xl);
}

/* ===================================
   Card Component
   =================================== */
.card {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}

.card--elevated {
  box-shadow: var(--shadow-base);
}

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

.card--interactive {
  cursor: pointer;
}

.card--interactive:hover {
  border-color: var(--color-border-focus);
  box-shadow: var(--shadow-md);
}

.card__header {
  padding: var(--spacing-4);
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-background-secondary);
}

.card__content {
  padding: var(--spacing-4);
}

.card__footer {
  padding: var(--spacing-4);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-background-secondary);
}

.card__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

.card__subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: var(--spacing-1) 0 0 0;
}

/* ===================================
   Badge Component
   =================================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-1) var(--spacing-2);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-tight);
  border-radius: var(--border-radius-full);
  white-space: nowrap;
}

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

.badge--success {
  background-color: #E3FCEF;
  color: var(--color-success);
}

.badge--warning {
  background-color: #FFFAE6;
  color: var(--color-warning);
}

.badge--danger {
  background-color: #FFEBE6;
  color: var(--color-danger);
}

.badge--neutral {
  background-color: var(--color-neutral-light);
  color: var(--color-neutral);
}

/* ===================================
   Grid System
   =================================== */
.grid {
  display: grid;
  gap: var(--spacing-6);
}

.grid--cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid--cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid--cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid--cols-5 { grid-template-columns: repeat(5, 1fr); }

/* ===================================
   Flexbox Utilities
   =================================== */
.flex {
  display: flex;
}

.flex--col {
  flex-direction: column;
}

.flex-row {
  flex-direction: row;
}

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

.flex--between {
  justify-content: space-between;
}

.flex--wrap {
  flex-wrap: wrap;
}

.flex--1 {
  flex: 1;
}

/* ===================================
   Spacing Utilities
   =================================== */
.m-0 { margin: var(--spacing-0); }
.m-1 { margin: var(--spacing-1); }
.m-2 { margin: var(--spacing-2); }
.m-3 { margin: var(--spacing-3); }
.m-4 { margin: var(--spacing-4); }
.m-5 { margin: var(--spacing-5); }
.m-6 { margin: var(--spacing-6); }
.m-8 { margin: var(--spacing-8); }
.m-10 { margin: var(--spacing-10); }
.m-12 { margin: var(--spacing-12); }

.mt-0 { margin-top: var(--spacing-0); }
.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-5 { margin-top: var(--spacing-5); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }
.mt-10 { margin-top: var(--spacing-10); }
.mt-12 { margin-top: var(--spacing-12); }

.mb-0 { margin-bottom: var(--spacing-0); }
.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-5 { margin-bottom: var(--spacing-5); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }
.mb-10 { margin-bottom: var(--spacing-10); }
.mb-12 { margin-bottom: var(--spacing-12); }

.p-0 { padding: var(--spacing-0); }
.p-1 { padding: var(--spacing-1); }
.p-2 { padding: var(--spacing-2); }
.p-3 { padding: var(--spacing-3); }
.p-4 { padding: var(--spacing-4); }
.p-5 { padding: var(--spacing-5); }
.p-6 { padding: var(--spacing-6); }
.p-8 { padding: var(--spacing-8); }
.p-10 { padding: var(--spacing-10); }
.p-12 { padding: var(--spacing-12); }

/* ===================================
   Text Utilities
   =================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

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

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 640px) {
  .grid--cols-2,
  .grid--cols-3,
  .grid--cols-4,
  .grid--cols-5 {
    grid-template-columns: 1fr;
  }
  
  .button--xlarge {
    padding: var(--spacing-4) var(--spacing-6);
    font-size: var(--font-size-lg);
  }
}

@media (max-width: 768px) {
  .grid--cols-4,
  .grid--cols-5 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 1024px) {
  .grid--cols-5 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ===================================
   Focus Management
   =================================== */
.focusable:focus {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
  border-radius: var(--border-radius-base);
}

/* ===================================
   Animation Utilities
   =================================== */
.animate--fade-in {
  animation: fadeIn var(--transition-slow) ease-in-out;
}

.animate--slide-up {
  animation: slideUp var(--transition-slow) ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===================================
   Responsive Utilities
   =================================== */

/* Display utilities */
.hidden { display: none !important; }
.block { display: block !important; }
.inline { display: inline !important; }
.inline-block { display: inline-block !important; }
.flex { display: flex !important; }
.inline-flex { display: inline-flex !important; }
.grid { display: grid !important; }

/* Responsive breakpoints */
@media (min-width: 640px) {
  .sm\:hidden { display: none !important; }
  .sm\:block { display: block !important; }
  .sm\:flex { display: flex !important; }
  .sm\:grid { display: grid !important; }
}

@media (min-width: 768px) {
  .md\:hidden { display: none !important; }
  .md\:block { display: block !important; }
  .md\:flex { display: flex !important; }
  .md\:grid { display: grid !important; }
}

@media (min-width: 1024px) {
  .lg\:hidden { display: none !important; }
  .lg\:block { display: block !important; }
  .lg\:flex { display: flex !important; }
  .lg\:grid { display: grid !important; }
}

@media (min-width: 1280px) {
  .xl\:hidden { display: none !important; }
  .xl\:block { display: block !important; }
  .xl\:flex { display: flex !important; }
  .xl\:grid { display: grid !important; }
}

@media (min-width: 1536px) {
  .\2xl\:hidden { display: none !important; }
  .\2xl\:block { display: block !important; }
  .\2xl\:flex { display: flex !important; }
  .\2xl\:grid { display: grid !important; }
}

/* ===================================
   Utility Classes
   =================================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.w-full { width: 100%; }
.h-full { height: 100%; }
.max-w-full { max-width: 100%; }
.max-w-sm { max-width: 24rem; }
.max-w-md { max-width: 28rem; }
.max-w-lg { max-width: 32rem; }
.max-w-xl { max-width: 36rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-3xl { max-width: 48rem; }
.max-w-4xl { max-width: 56rem; }
.max-w-5xl { max-width: 64rem; }
.max-w-6xl { max-width: 72rem; }

.mx-auto { margin-left: auto; margin-right: auto; }
.my-auto { margin-top: auto; margin-bottom: auto; }