/* ========================================
   NIIPY DESIGN SYSTEM - CSS VARIABLES
   ======================================== */

/* Base font import */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

:root {
  /* =====================================
     COLOR SYSTEM
     ===================================== */
  
  /* Primary Colors - Coral/Red */
  --color-primary: #FF6B6B;
  --color-primary-hover: #FF5252;
  --color-primary-pressed: #E63946;
  --color-primary-light: #FFE5E5;
  
  /* Secondary Colors */
  --color-blue: #4A90E2;
  --color-blue-hover: #3A7BC8;
  --color-blue-pressed: #2A66AE;
  --color-blue-light: #E8F4FF;
  
  --color-green: #4CAF50;
  --color-green-hover: #45A049;
  --color-green-pressed: #3D8B40;
  --color-green-light: #E8F5E9;
  
  --color-purple: #9C27B0;
  --color-purple-hover: #8E24AA;
  --color-purple-pressed: #7B1FA2;
  --color-purple-light: #F3E5F5;
  
  --color-orange: #FF9800;
  --color-orange-hover: #FB8C00;
  --color-orange-pressed: #F57C00;
  --color-orange-light: #FFF3E0;
  
  /* Neutral Colors */
  --color-gray-50: #FAFAFA;
  --color-gray-100: #F5F5F5;
  --color-gray-200: #EEEEEE;
  --color-gray-300: #E0E0E0;
  --color-gray-400: #BDBDBD;
  --color-gray-500: #9E9E9E;
  --color-gray-600: #757575;
  --color-gray-700: #616161;
  --color-gray-800: #424242;
  --color-gray-900: #212121;
  
  /* Semantic Colors */
  --color-success: var(--color-green);
  --color-error: var(--color-primary);
  --color-warning: var(--color-orange);
  --color-info: var(--color-blue);
  
  /* Background & Surface */
  --color-background: #FFFFFF;
  --color-surface: #FAFAFA;
  --color-surface-dark: #1A1A1A;
  
  /* Text Colors */
  --color-text-primary: #212121;
  --color-text-secondary: #757575;
  --color-text-disabled: #BDBDBD;
  --color-text-inverse: #FFFFFF;
  
  /* Border Colors */
  --color-border: #E0E0E0;
  --color-border-hover: #BDBDBD;
  --color-border-focus: var(--color-primary);
  
  /* =====================================
     TYPOGRAPHY SYSTEM
     ===================================== */
  
  /* Font Family */
  --font-family-primary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  /* Font Sizes - 8pt grid system */
  --font-size-xs: 12px;      /* 12px */
  --font-size-sm: 14px;      /* 14px (exception for readability) */
  --font-size-base: 16px;    /* 16px */
  --font-size-lg: 18px;      /* 18px (exception for readability) */
  --font-size-xl: 24px;      /* 24px */
  --font-size-2xl: 32px;     /* 32px */
  --font-size-3xl: 40px;     /* 40px */
  --font-size-4xl: 48px;     /* 48px */
  
  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  
  /* Line Heights - Based on 8pt grid */
  --line-height-tight: 1.25;    /* 20px for 16px font */
  --line-height-normal: 1.5;    /* 24px for 16px font */
  --line-height-relaxed: 1.75;  /* 28px for 16px font */
  
  /* Letter Spacing */
  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.02em;
  
  /* =====================================
     SPACING SYSTEM - 8pt Grid
     ===================================== */
  
  --spacing-0: 0;
  --spacing-1: 4px;     /* 0.5 unit */
  --spacing-2: 8px;     /* 1 unit */
  --spacing-3: 12px;    /* 1.5 units */
  --spacing-4: 16px;    /* 2 units */
  --spacing-5: 20px;    /* 2.5 units */
  --spacing-6: 24px;    /* 3 units */
  --spacing-8: 32px;    /* 4 units */
  --spacing-10: 40px;   /* 5 units */
  --spacing-12: 48px;   /* 6 units */
  --spacing-16: 64px;   /* 8 units */
  --spacing-20: 80px;   /* 10 units */
  --spacing-24: 96px;   /* 12 units */
  
  /* =====================================
     BORDER RADIUS - 8pt Grid
     ===================================== */
  
  --radius-none: 0;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  
  /* =====================================
     SHADOWS - Elevation System
     ===================================== */
  
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* =====================================
     TRANSITIONS & ANIMATIONS
     ===================================== */
  
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* =====================================
     Z-INDEX SYSTEM
     ===================================== */
  
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-overlay: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
}

/* =====================================
   BASE STYLES
   ===================================== */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

/* =====================================
   TYPOGRAPHY CLASSES
   ===================================== */

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

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

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

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

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

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

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

/* =====================================
   BUTTON SYSTEM
   ===================================== */

.btn {
  /* Base button styles */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  font-family: var(--font-family-primary);
  font-weight: var(--font-weight-medium);
  text-align: center;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  border-radius: var(--radius-md);
  outline: none;
  user-select: none;
}

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

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

/* Button Sizes */
.btn-sm {
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--font-size-sm);
  height: 32px;
}

.btn-md {
  padding: var(--spacing-3) var(--spacing-6);
  font-size: var(--font-size-base);
  height: 40px;
}

.btn-lg {
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--font-size-lg);
  height: 48px;
}

/* Button Variants - Primary (Coral) */
.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

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

.btn-primary:active:not(:disabled) {
  background-color: var(--color-primary-pressed);
}

/* Button Variants - Blue */
.btn-blue {
  background-color: var(--color-blue);
  color: var(--color-text-inverse);
}

.btn-blue:hover:not(:disabled) {
  background-color: var(--color-blue-hover);
}

.btn-blue:active:not(:disabled) {
  background-color: var(--color-blue-pressed);
}

/* Button Variants - Green */
.btn-green {
  background-color: var(--color-green);
  color: var(--color-text-inverse);
}

.btn-green:hover:not(:disabled) {
  background-color: var(--color-green-hover);
}

.btn-green:active:not(:disabled) {
  background-color: var(--color-green-pressed);
}

/* Button Variants - Purple */
.btn-purple {
  background-color: var(--color-purple);
  color: var(--color-text-inverse);
}

.btn-purple:hover:not(:disabled) {
  background-color: var(--color-purple-hover);
}

.btn-purple:active:not(:disabled) {
  background-color: var(--color-purple-pressed);
}

/* Button Variants - Orange */
.btn-orange {
  background-color: var(--color-orange);
  color: var(--color-text-inverse);
}

.btn-orange:hover:not(:disabled) {
  background-color: var(--color-orange-hover);
}

.btn-orange:active:not(:disabled) {
  background-color: var(--color-orange-pressed);
}

/* Button Variants - Outline */
.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
  background-color: var(--color-primary-light);
}

.btn-outline:active:not(:disabled) {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

/* Button Variants - Ghost */
.btn-ghost {
  background-color: transparent;
  color: var(--color-text-primary);
}

.btn-ghost:hover:not(:disabled) {
  background-color: var(--color-gray-100);
}

.btn-ghost:active:not(:disabled) {
  background-color: var(--color-gray-200);
}

/* =====================================
   FORM ELEMENTS
   ===================================== */

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-2);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  outline: none;
}

.form-input:hover,
.form-textarea:hover,
.form-select:hover {
  border-color: var(--color-border-hover);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
}

.form-input:disabled,
.form-textarea:disabled,
.form-select:disabled {
  background-color: var(--color-gray-100);
  color: var(--color-text-disabled);
  cursor: not-allowed;
}

.form-textarea {
  resize: vertical;
  min-height: 96px;
}

/* =====================================
   CARD & CONTAINER SYSTEM
   ===================================== */

.card {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  transition: all var(--transition-base);
}

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

/* =====================================
   ALERT SYSTEM
   ===================================== */

.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  padding: var(--spacing-4);
  border-radius: var(--radius-md);
  border-left: 4px solid;
  font-size: var(--font-size-sm);
}

.alert-info {
  background-color: var(--color-blue-light);
  border-left-color: var(--color-blue);
  color: var(--color-blue-pressed);
}

.alert-success {
  background-color: var(--color-green-light);
  border-left-color: var(--color-green);
  color: var(--color-green-pressed);
}

.alert-warning {
  background-color: var(--color-orange-light);
  border-left-color: var(--color-orange);
  color: var(--color-orange-pressed);
}

.alert-error {
  background-color: var(--color-primary-light);
  border-left-color: var(--color-primary);
  color: var(--color-primary-pressed);
}

/* =====================================
   UTILITY CLASSES
   ===================================== */

/* Display */
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }
.hidden { display: none; }

/* Flexbox utilities */
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.gap-1 { gap: var(--spacing-1); }
.gap-2 { gap: var(--spacing-2); }
.gap-3 { gap: var(--spacing-3); }
.gap-4 { gap: var(--spacing-4); }
.gap-6 { gap: var(--spacing-6); }
.gap-8 { gap: var(--spacing-8); }

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

/* Color utilities */
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-disabled); }

/* Width utilities */
.w-full { width: 100%; }
.h-full { height: 100%; }