/**
 * Authentication Button - IT-Wallet
 * Official component for authentication via IT-Wallet
 * Based on Bootstrap Italia
 * 
 * Brand Manual Specifications:
 * - Icon: IT-Wallet symbol (left side only)
 * - Font: Titillium Sans Pro (sizes according to design system)
 * - Variant: primary blue #0066CC only (no outline)
 * - Three positioning variants:
 *   1. Standard: icon and label left-aligned, size depends on label length
 *   2. Fixed centered: fixed size, icon and label centered
 *   3. Fixed justified: fixed size, icon left-aligned, label centered in remaining space
 * 
 * Official Colors:
 * - Primary: #0066CC (Blu Italia)
 * - Text: #FFFFFF (White)
 */

/* Font definitions - Local static fonts (default) */
/* Uncomment the @import below to use Google Fonts CDN instead of local fonts */
/* @import url('https://fonts.googleapis.com/css2?family=Titillium+Web:wght@400;600;700&display=swap'); */

/* Local font files - implementation of the design-system font "Titillium Sans Pro"
 * via the open-source webfont files commonly distributed as "Titillium Web".
 */
@font-face {
  font-family: 'Titillium Sans Pro';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/titillium-web-400.ttf') format('truetype');
}

@font-face {
  font-family: 'Titillium Sans Pro';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('fonts/titillium-web-600.ttf') format('truetype');
}

@font-face {
  font-family: 'Titillium Sans Pro';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('fonts/titillium-web-700.ttf') format('truetype');
}

/* Reset and base */
.btn-itwallet-auth {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: "Titillium Sans Pro", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-weight: 600; /* Semi-bold per il label principale */
  text-align: left;
  text-decoration: none;
  vertical-align: middle;
  cursor: pointer;
  user-select: none;
  border: 2px solid transparent;
  border-radius: 4px;
  transition: all 0.2s ease-in-out;
  background-color: #0066CC;
  color: #FFFFFF;
  padding: 0.5rem 1rem;
  /* Default size: Small (S) per Brand Manual */
  font-size: 0.875rem;    /* 14px */
  line-height: 1.428;     /* ~20px */
  min-height: 40px; /* Accessibility: minimum touch area */
  gap: 0.5rem;
  justify-content: flex-start; /* Default: left alignment */
}

.btn-itwallet-auth:hover:not(:disabled) {
  background-color: #0052A3;
  color: #FFFFFF;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 102, 204, 0.3);
}

.btn-itwallet-auth:focus {
  outline: 2px solid #7B61FF;
  outline-offset: 2px;
  background-color: #0066CC;
  color: #FFFFFF;
}


.btn-itwallet-auth:active:not(:disabled) {
  background-color: #003D7A;
  transform: translateY(0);
  box-shadow: 0 2px 4px rgba(0, 102, 204, 0.2);
}

.btn-itwallet-auth:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background-color: #0066CC;
  color: #FFFFFF;
}

/* Icon - default size Small (S) */
.btn-itwallet-auth .btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 16px;
  height: 20px;
}

.btn-itwallet-auth .btn-icon svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

/* Text */
.btn-itwallet-auth .btn-text {
  white-space: nowrap;
}

/* Positioning variants */

/* 1. Standard: icon and label left-aligned, size depends on label (default) */
.btn-itwallet-auth.btn-standard {
  justify-content: flex-start;
  width: auto;
}

/* 2. Fixed centered: fixed size, icon and label centered */
.btn-itwallet-auth.btn-fixed-centered {
  justify-content: center;
  width: 280px; /* Standard fixed size, can be customized */
}

/* 3. Fixed justified: fixed size, icon left-aligned, label centered in remaining space */
.btn-itwallet-auth.btn-fixed-justified {
  justify-content: flex-start;
  width: 280px; /* Standard fixed size, can be customized */
  position: relative;
}

.btn-itwallet-auth.btn-fixed-justified .btn-icon {
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.btn-itwallet-auth.btn-fixed-justified .btn-text {
  position: absolute;
  left: 0;
  right: 0;
  text-align: center;
  padding-left: 0;
}

/* Sizes - default is Small (S) */

/* Small (default) - base .btn-itwallet-auth already uses these values */
.btn-itwallet-auth.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;   /* 14px */
  line-height: 1.428;    /* ~20px */
  min-height: 40px;
  gap: 0.5rem;
}

.btn-itwallet-auth.btn-sm .btn-icon {
  width: 16px;
  height: 20px;
}

/* Medium */
.btn-itwallet-auth.btn-md {
  padding: 0.625rem 1.25rem;
  font-size: 0.9375rem;  /* 15px */
  line-height: 1.4;      /* ~21px */
  min-height: 48px;
}

.btn-itwallet-auth.btn-md .btn-icon {
  width: 18px;
  height: 22px;
}

/* Large */
.btn-itwallet-auth.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.125rem;   /* 18px */
  line-height: 1.444;    /* ~26px */
  min-height: 56px;
}

.btn-itwallet-auth.btn-lg .btn-icon {
  width: 24px;
  height: 28px;
}

/* Responsive */
@media (max-width: 768px) {
  .btn-itwallet-auth {
    width: 100%;
    max-width: 100%;
  }
  
  .btn-itwallet-auth.btn-lg {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
  }
}

/* Accessibility: visible focus for keyboard */
.btn-itwallet-auth:focus-visible {
  outline: 3px solid #7B61FF;
  outline-offset: 3px;
}

/* Support for reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  .btn-itwallet-auth {
    transition: none;
  }
  
  .btn-itwallet-auth:hover:not(:disabled) {
    transform: none;
  }
  
  .btn-itwallet-auth:active:not(:disabled) {
    transform: none;
  }
}

/* Styles for link (if used as <a>) */
a.btn-itwallet-auth {
  display: inline-flex;
  text-decoration: none;
}

a.btn-itwallet-auth:hover {
  text-decoration: none;
}

/* Print styles */
@media print {
  .btn-itwallet-auth {
    border: 1px solid #000000;
    background-color: transparent;
    color: #000000;
  }
  
  .btn-itwallet-auth .btn-icon {
    display: none;
  }
}