/**
 * oneID - Unified CSS Design System
 * Version: 3.0.0
 * 
 * Single CSS file for all oneID variants
 * Features: Design tokens, base components, OTP components, utility classes
 */

/* ===== DESIGN TOKENS (CSS VARIABLES) ===== */
:root {
  /* Colors */
  --oneid-primary: #3b82f6;
  --oneid-primary-dark: #1d4ed8;
  --oneid-primary-light: #dbeafe;
  --oneid-success: #10b981;
  --oneid-success-dark: #059669;
  --oneid-success-light: #d1fae5;
  --oneid-error: #ef4444;
  --oneid-error-dark: #dc2626;
  --oneid-error-light: #fee2e2;
  --oneid-warning: #f59e0b;
  --oneid-warning-dark: #d97706;
  --oneid-warning-light: #fef3c7;
  
  /* Neutral Colors */
  --oneid-gray-50: #f9fafb;
  --oneid-gray-100: #f3f4f6;
  --oneid-gray-200: #e5e7eb;
  --oneid-gray-300: #d1d5db;
  --oneid-gray-400: #9ca3af;
  --oneid-gray-500: #6b7280;
  --oneid-gray-600: #4b5563;
  --oneid-gray-700: #374151;
  --oneid-gray-800: #1f2937;
  --oneid-gray-900: #111827;
  
  /* Spacing */
  --oneid-spacing-xs: 0.25rem;   /* 4px */
  --oneid-spacing-sm: 0.5rem;    /* 8px */
  --oneid-spacing-md: 1rem;      /* 16px */
  --oneid-spacing-lg: 1.5rem;    /* 24px */
  --oneid-spacing-xl: 2rem;      /* 32px */
  --oneid-spacing-2xl: 3rem;     /* 48px */
  
  /* Border Radius */
  --oneid-radius-sm: 0.25rem;    /* 4px */
  --oneid-radius-md: 0.5rem;     /* 8px */
  --oneid-radius-lg: 0.75rem;    /* 12px */
  --oneid-radius-xl: 1rem;       /* 16px */
  --oneid-radius-2xl: 1.5rem;    /* 24px */
  --oneid-radius-full: 9999px;
  
  /* Shadows */
  --oneid-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --oneid-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --oneid-shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --oneid-shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
  --oneid-shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.06);
  
  /* Typography */
  --oneid-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --oneid-font-size-xs: 0.75rem;   /* 12px */
  --oneid-font-size-sm: 0.875rem;  /* 14px */
  --oneid-font-size-base: 1rem;    /* 16px */
  --oneid-font-size-lg: 1.125rem;  /* 18px */
  --oneid-font-size-xl: 1.25rem;   /* 20px */
  --oneid-font-size-2xl: 1.5rem;   /* 24px */
  --oneid-font-size-3xl: 1.875rem; /* 30px */
  
  /* Font Weights */
  --oneid-font-normal: 400;
  --oneid-font-medium: 500;
  --oneid-font-semibold: 600;
  --oneid-font-bold: 700;
  
  /* Line Heights */
  --oneid-leading-tight: 1.25;
  --oneid-leading-normal: 1.5;
  --oneid-leading-relaxed: 1.75;
  
  /* Transitions */
  --oneid-transition-fast: all 0.15s ease-in-out;
  --oneid-transition-normal: all 0.2s ease-in-out;
  --oneid-transition-slow: all 0.3s ease-in-out;
  
  /* Z-Index */
  --oneid-z-dropdown: 1000;
  --oneid-z-sticky: 1020;
  --oneid-z-fixed: 1030;
  --oneid-z-modal: 1040;
  --oneid-z-popover: 1050;
  --oneid-z-tooltip: 1060;
}

/* ===== BASE COMPONENTS ===== */

/* Container */
.oneid-container {
  max-width: 28rem; /* 448px */
  margin: 0 auto;
  padding: var(--oneid-spacing-lg);
  background: #ffffff;
  border-radius: var(--oneid-radius-lg);
  box-shadow: var(--oneid-shadow-lg);
  font-family: var(--oneid-font-family);
  line-height: var(--oneid-leading-normal);
}

/* Form */
.oneid-form {
  display: flex;
  flex-direction: column;
  gap: var(--oneid-spacing-md);
}

/* Form Field */
.oneid-form-field {
  display: flex;
  flex-direction: column;
  gap: var(--oneid-spacing-sm);
}

.oneid-form-field label {
  font-size: var(--oneid-font-size-sm);
  font-weight: var(--oneid-font-medium);
  color: var(--oneid-gray-700);
  line-height: var(--oneid-leading-tight);
}

/* Input */
.oneid-input {
  width: 100%;
  padding: var(--oneid-spacing-md);
  font-size: var(--oneid-font-size-base);
  font-family: inherit;
  line-height: var(--oneid-leading-normal);
  color: var(--oneid-gray-900);
  background-color: #ffffff;
  border: 1px solid var(--oneid-gray-300);
  border-radius: var(--oneid-radius-md);
  transition: var(--oneid-transition-normal);
  box-sizing: border-box;
}

.oneid-input:focus {
  outline: none;
  border-color: var(--oneid-primary);
  box-shadow: 0 0 0 3px var(--oneid-primary-light);
}

.oneid-input:disabled {
  background-color: var(--oneid-gray-100);
  color: var(--oneid-gray-500);
  cursor: not-allowed;
}

.oneid-input.oneid-error {
  border-color: var(--oneid-error);
  box-shadow: 0 0 0 3px var(--oneid-error-light);
}

/* Button */
.oneid-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--oneid-spacing-sm);
  padding: var(--oneid-spacing-md) var(--oneid-spacing-lg);
  font-size: var(--oneid-font-size-base);
  font-weight: var(--oneid-font-medium);
  font-family: inherit;
  line-height: var(--oneid-leading-tight);
  color: #ffffff;
  background-color: var(--oneid-primary);
  border: 1px solid transparent;
  border-radius: var(--oneid-radius-md);
  cursor: pointer;
  transition: var(--oneid-transition-normal);
  text-decoration: none;
  box-sizing: border-box;
  min-height: 2.75rem;
}

.oneid-button:hover:not(:disabled) {
  background-color: var(--oneid-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--oneid-shadow-md);
}

.oneid-button:focus {
  outline: none;
  box-shadow: 0 0 0 3px var(--oneid-primary-light);
}

.oneid-button:active {
  transform: translateY(0);
}

.oneid-button:disabled {
  background-color: var(--oneid-gray-400);
  color: var(--oneid-gray-500);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

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

.oneid-button-secondary:hover:not(:disabled) {
  background-color: var(--oneid-primary);
  color: #ffffff;
}

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

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

.oneid-button-error {
  background-color: var(--oneid-error);
}

.oneid-button-error:hover:not(:disabled) {
  background-color: var(--oneid-error-dark);
}

/* Button Sizes */
.oneid-button-sm {
  padding: var(--oneid-spacing-sm) var(--oneid-spacing-md);
  font-size: var(--oneid-font-size-sm);
  min-height: 2rem;
}

.oneid-button-lg {
  padding: var(--oneid-spacing-lg) var(--oneid-spacing-xl);
  font-size: var(--oneid-font-size-lg);
  min-height: 3rem;
}

.oneid-button-full {
    width: 100%;
}

/* Message */
.oneid-message {
  display: none;
  padding: 0.85rem 1.2rem;
  border-radius: 7px;
  font-size: 1.05rem;
  font-weight: 500;
  box-shadow: 0 2px 12px rgba(0,0,0,0.04);
  border-width: 1.5px;
  border-style: solid;
  outline: none;
  transition: background 0.2s, color 0.2s, border 0.2s;
  word-break: break-word;
}
.oneid-message.success {
  background: #e6f9ed;
  color: #1a7f37;
  border-color: #b7ebc6;
}
.oneid-message.error {
  background: #fff1f0;
  color: #d4380d;
  border-color: #ffa39e;
}
.oneid-message.warning {
  background: #fffbe6;
  color: #ad8b00;
  border-color: #ffe58f;
}
.oneid-message.info {
  background: #e6f4ff;
  color: #0958d9;
  border-color: #91d5ff;
}

/* ===== OTP COMPONENTS ===== */

/* OTP Container */
.oneid-otp-container {
  display: flex;
  gap: var(--oneid-spacing-sm);
  justify-content: center;
  align-items: center;
  margin: var(--oneid-spacing-md) 0;
}

/* OTP Digit Input */
.oneid-otp-digit {
  width: 3rem; /* 48px */
  height: 3rem; /* 48px */
  text-align: center;
  font-size: var(--oneid-font-size-xl);
  font-weight: var(--oneid-font-semibold);
  color: var(--oneid-gray-900);
  background-color: #ffffff;
  border: 2px solid var(--oneid-gray-300);
  border-radius: var(--oneid-radius-md);
  transition: var(--oneid-transition-normal);
  box-sizing: border-box;
}

.oneid-otp-digit:focus {
  outline: none;
  border-color: var(--oneid-primary);
  box-shadow: 0 0 0 3px var(--oneid-primary-light);
}

.oneid-otp-digit.oneid-otp-error {
  border-color: var(--oneid-error);
  background-color: var(--oneid-error-light);
  color: var(--oneid-error-dark);
  animation: oneid-shake 0.4s ease-in-out;
}

/* OTP Single Input */
.oneid-otp-single {
  width: 100%;
  max-width: 12rem; /* 192px */
  height: 3rem; /* 48px */
    text-align: center;
  font-size: var(--oneid-font-size-lg);
  font-weight: var(--oneid-font-semibold);
  color: var(--oneid-gray-900);
  background-color: #ffffff;
  border: 2px solid var(--oneid-gray-300);
  border-radius: var(--oneid-radius-md);
  transition: var(--oneid-transition-normal);
  box-sizing: border-box;
}

.oneid-otp-single:focus {
  outline: none;
  border-color: var(--oneid-primary);
  box-shadow: 0 0 0 3px var(--oneid-primary-light);
}

.oneid-otp-single.oneid-otp-error {
  border-color: var(--oneid-error);
  background-color: var(--oneid-error-light);
  color: var(--oneid-error-dark);
  animation: oneid-shake 0.4s ease-in-out;
}

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

/* Display */
.oneid-hidden {
  display: none !important;
}

.oneid-block {
  display: block !important;
}

.oneid-inline-block {
  display: inline-block !important;
}

.oneid-flex {
  display: flex !important;
}

.oneid-inline-flex {
  display: inline-flex !important;
}

/* Flex Utilities */
.oneid-flex-col {
  flex-direction: column !important;
}

.oneid-flex-row {
  flex-direction: row !important;
}

.oneid-items-center {
  align-items: center !important;
}

.oneid-items-start {
  align-items: flex-start !important;
}

.oneid-items-end {
  align-items: flex-end !important;
}

.oneid-justify-center {
  justify-content: center !important;
}

.oneid-justify-between {
  justify-content: space-between !important;
}

.oneid-justify-start {
  justify-content: flex-start !important;
}

.oneid-justify-end {
  justify-content: flex-end !important;
}

/* Spacing */
.oneid-m-0 { margin: 0 !important; }
.oneid-m-1 { margin: var(--oneid-spacing-xs) !important; }
.oneid-m-2 { margin: var(--oneid-spacing-sm) !important; }
.oneid-m-3 { margin: var(--oneid-spacing-md) !important; }
.oneid-m-4 { margin: var(--oneid-spacing-lg) !important; }
.oneid-m-5 { margin: var(--oneid-spacing-xl) !important; }

.oneid-p-0 { padding: 0 !important; }
.oneid-p-1 { padding: var(--oneid-spacing-xs) !important; }
.oneid-p-2 { padding: var(--oneid-spacing-sm) !important; }
.oneid-p-3 { padding: var(--oneid-spacing-md) !important; }
.oneid-p-4 { padding: var(--oneid-spacing-lg) !important; }
.oneid-p-5 { padding: var(--oneid-spacing-xl) !important; }

/* Text */
.oneid-text-left { text-align: left !important; }
.oneid-text-center { text-align: center !important; }
.oneid-text-right { text-align: right !important; }

.oneid-text-xs { font-size: var(--oneid-font-size-xs) !important; }
.oneid-text-sm { font-size: var(--oneid-font-size-sm) !important; }
.oneid-text-base { font-size: var(--oneid-font-size-base) !important; }
.oneid-text-lg { font-size: var(--oneid-font-size-lg) !important; }
.oneid-text-xl { font-size: var(--oneid-font-size-xl) !important; }
.oneid-text-2xl { font-size: var(--oneid-font-size-2xl) !important; }

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

/* Colors */
.oneid-text-primary { color: var(--oneid-primary) !important; }
.oneid-text-success { color: var(--oneid-success) !important; }
.oneid-text-error { color: var(--oneid-error) !important; }
.oneid-text-warning { color: var(--oneid-warning) !important; }
.oneid-text-gray-500 { color: var(--oneid-gray-500) !important; }
.oneid-text-gray-600 { color: var(--oneid-gray-600) !important; }
.oneid-text-gray-700 { color: var(--oneid-gray-700) !important; }

.oneid-bg-primary { background-color: var(--oneid-primary) !important; }
.oneid-bg-success { background-color: var(--oneid-success) !important; }
.oneid-bg-error { background-color: var(--oneid-error) !important; }
.oneid-bg-warning { background-color: var(--oneid-warning) !important; }
.oneid-bg-gray-50 { background-color: var(--oneid-gray-50) !important; }
.oneid-bg-gray-100 { background-color: var(--oneid-gray-100) !important; }
.oneid-bg-white { background-color: #ffffff !important; }

/* Border Radius */
.oneid-rounded-sm { border-radius: var(--oneid-radius-sm) !important; }
.oneid-rounded-md { border-radius: var(--oneid-radius-md) !important; }
.oneid-rounded-lg { border-radius: var(--oneid-radius-lg) !important; }
.oneid-rounded-xl { border-radius: var(--oneid-radius-xl) !important; }
.oneid-rounded-full { border-radius: var(--oneid-radius-full) !important; }

/* Shadows */
.oneid-shadow-sm { box-shadow: var(--oneid-shadow-sm) !important; }
.oneid-shadow-md { box-shadow: var(--oneid-shadow-md) !important; }
.oneid-shadow-lg { box-shadow: var(--oneid-shadow-lg) !important; }
.oneid-shadow-xl { box-shadow: var(--oneid-shadow-xl) !important; }

/* States */
.oneid-loading {
  opacity: 0.7;
  pointer-events: none;
  position: relative;
}

.oneid-loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 1rem;
  height: 1rem;
  margin: -0.5rem 0 0 -0.5rem;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: oneid-spin 1s linear infinite;
}

.oneid-disabled {
  opacity: 0.5;
  pointer-events: none;
  cursor: not-allowed;
}

/* ===== ANIMATIONS ===== */

@keyframes oneid-spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes oneid-shake {
  0%, 100% {
    transform: translateX(0);
  }
  10%, 30%, 50%, 70%, 90% {
    transform: translateX(-2px);
  }
  20%, 40%, 60%, 80% {
    transform: translateX(2px);
  }
}

@keyframes oneid-fade-in {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes oneid-fade-out {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-10px);
  }
}

/* ===== RESPONSIVE DESIGN ===== */

@media (max-width: 640px) {
  .oneid-container {
    margin: var(--oneid-spacing-md);
    padding: var(--oneid-spacing-md);
    max-width: none;
  }
  
  .oneid-otp-container {
    gap: var(--oneid-spacing-xs);
  }
  
  .oneid-otp-digit {
    width: 2.5rem; /* 40px */
    height: 2.5rem; /* 40px */
    font-size: var(--oneid-font-size-lg);
  }
  
  .oneid-button {
    width: 100%;
    margin-bottom: var(--oneid-spacing-sm);
  }
  
  .oneid-button:last-child {
    margin-bottom: 0;
  }
}

@media (max-width: 480px) {
  .oneid-otp-digit {
    width: 2.25rem; /* 36px */
    height: 2.25rem; /* 36px */
    font-size: var(--oneid-font-size-base);
  }
  
  .oneid-text-2xl {
    font-size: var(--oneid-font-size-xl);
  }
}

/* ===== ACCESSIBILITY ===== */

/* Focus indicators for keyboard navigation */
.oneid-input:focus,
.oneid-button:focus,
.oneid-otp-digit:focus,
.oneid-otp-single:focus {
  outline: 2px solid var(--oneid-primary);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .oneid-container {
    border: 2px solid var(--oneid-gray-900);
  }
  
  .oneid-input,
  .oneid-button,
  .oneid-otp-digit,
  .oneid-otp-single {
    border: 2px solid var(--oneid-gray-900);
  }
  
  .oneid-button {
    background-color: var(--oneid-gray-900);
    color: #ffffff;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
  .oneid-shake {
        animation: none !important;
    }
}

/* ===== PRINT STYLES ===== */

@media print {
  .oneid-container {
        box-shadow: none;
    border: 1px solid var(--oneid-gray-300);
}

.oneid-button {
    background-color: var(--oneid-gray-900) !important;
    color: #ffffff !important;
    border: 1px solid var(--oneid-gray-900) !important;
  }
}

/* ===== RTL SUPPORT ===== */

[dir="rtl"] .oneid-otp-container {
  flex-direction: row-reverse;
}

[dir="rtl"] .oneid-text-left {
  text-align: right;
}

[dir="rtl"] .oneid-text-right {
  text-align: left;
}