/**
 * Language Toggle Button - Premium Modern Design
 * Ultra-modern design with advanced visual effects and micro-interactions
 * 
 * @author Senior Frontend Architect
 * @version 10.0.0
 */

/*--------------------------------------------------------------
# CSS CUSTOM PROPERTIES
--------------------------------------------------------------*/
:root {
  --i18n-bg: linear-gradient(135deg, var(--primary), var(--accent));
  --i18n-bg-hover: linear-gradient(
    135deg,
    var(--primary-hover),
    var(--accent-hover)
  );
  --i18n-border: var(--primary);
  --i18n-shadow: 0 4px 15px rgba(37, 99, 235, 0.2), 0 2px 8px rgba(0, 0, 0, 0.1);
  --i18n-shadow-hover: 0 8px 25px rgba(37, 99, 235, 0.3),
    0 4px 12px rgba(0, 0, 0, 0.15);
  --i18n-glow: 0 0 20px rgba(37, 99, 235, 0.4);
  --i18n-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --i18n-scale: 1;
  --i18n-scale-hover: 1.05;
  --i18n-rotate: 0deg;
  --i18n-text: white;
  --i18n-text-hover: white;
}

@media (prefers-color-scheme: dark) {
  :root {
    --i18n-bg: linear-gradient(135deg, var(--primary), var(--accent));
    --i18n-bg-hover: linear-gradient(
      135deg,
      var(--primary-hover),
      var(--accent-hover)
    );
    --i18n-border: var(--primary);
    --i18n-shadow: 0 4px 15px rgba(37, 99, 235, 0.3),
      0 2px 8px rgba(0, 0, 0, 0.2);
    --i18n-shadow-hover: 0 8px 25px rgba(37, 99, 235, 0.4),
      0 4px 12px rgba(0, 0, 0, 0.3);
    --i18n-glow: 0 0 20px rgba(37, 99, 235, 0.5);
    --i18n-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --i18n-scale: 1;
    --i18n-scale-hover: 1.05;
    --i18n-rotate: 0deg;
    --i18n-text: white;
    --i18n-text-hover: white;
  }
}

/*--------------------------------------------------------------
# PREMIUM LANGUAGE TOGGLE BUTTON
--------------------------------------------------------------*/
.i18n-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.5rem 0.8rem;
  min-height: 36px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50px;
  cursor: pointer;
  font: 600 13px/1.2 ui-sans-serif, system-ui;
  color: #0b1220;
  position: absolute;
  top: 12px;
  inset-inline-end: 16px;
  user-select: none;
  outline: none;
  transition: var(--i18n-transition);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.16),
    inset 0 1px 0 rgba(255, 255, 255, 0.12), inset 0 -1px 0 rgba(0, 0, 0, 0.08);
  z-index: 1000;
  transform: scale(var(--i18n-scale)) rotate(var(--i18n-rotate));
  backdrop-filter: blur(10px);
}

/* RTL Positioning Override */
html[dir="rtl"] .i18n-link {
  inset-inline-start: 16px;
  inset-inline-end: auto;
}

/*--------------------------------------------------------------
# PREMIUM HOVER EFFECTS
--------------------------------------------------------------*/
.i18n-link:hover {
  background: rgba(37, 99, 235, 0.9); /* primary blue */
  border-color: rgba(37, 99, 235, 0.45);
  box-shadow: 0 8px 30px rgba(37, 99, 235, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.2), inset 0 -1px 0 rgba(0, 0, 0, 0.1);
  transform: translateY(-2px) scale(var(--i18n-scale-hover));
  color: white;
}

.i18n-link:active {
  transform: scale(0.95) translateY(0) rotate(0deg);
  box-shadow: var(--i18n-shadow);
  --i18n-rotate: 0deg;
}

/*--------------------------------------------------------------
# PREMIUM LANGUAGE SEGMENTS
--------------------------------------------------------------*/
.i18n-link .i18n-sep {
  opacity: 0.6;
  font-weight: 300;
  font-size: 0.85em;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  color: #1f2937;
  transform: scale(1);
}

.i18n-link:hover .i18n-sep {
  opacity: 0.9;
  color: rgba(255, 255, 255, 0.9);
  transform: scale(1.1) rotate(-2deg);
}

.i18n-link .i18n-cur {
  position: relative;
  font-weight: 700;
  font-size: 1em;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  color: #0b1220;
  transform: scale(1);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.i18n-link .is-active {
  font-weight: 800;
  color: #0b1220;
}

.i18n-link:hover .is-active {
  color: white;
}

.i18n-link .i18n-alt.is-active {
  font-weight: 800;
  opacity: 1;
}

.i18n-link:hover .i18n-alt.is-active {
  color: white;
}

.i18n-link:hover .i18n-cur {
  color: white;
  transform: scale(1.05) rotate(1deg);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.i18n-link .i18n-alt {
  opacity: 0.7;
  font-weight: 500;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  color: #111827;
  transform: scale(1);
}

.i18n-link:hover .i18n-alt {
  opacity: 0.9;
  color: rgba(255, 255, 255, 0.95);
  transform: scale(1.08) rotate(-1deg);
}

/*--------------------------------------------------------------
# PREMIUM UNDERLINE ANIMATION
--------------------------------------------------------------*/
.i18n-link .i18n-cur::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: -3px;
  height: 3px;
  transform: scaleX(0) rotate(-1deg);
  transform-origin: inline-start;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.8),
    rgba(255, 255, 255, 0.6),
    rgba(255, 255, 255, 0.4)
  );
  border-radius: 2px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 6px rgba(255, 255, 255, 0.3),
    0 0 12px rgba(255, 255, 255, 0.2);
}

.i18n-link:hover .i18n-cur::after {
  transform: scaleX(1) rotate(0deg);
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.5),
    0 0 16px rgba(255, 255, 255, 0.3);
}

/* RTL Underline Animation */
html[dir="rtl"] .i18n-link .i18n-cur::after {
  transform-origin: inline-end;
  background: linear-gradient(
    270deg,
    rgba(255, 255, 255, 0.8),
    rgba(255, 255, 255, 0.6),
    rgba(255, 255, 255, 0.4)
  );
}

/*--------------------------------------------------------------
# PREMIUM DARK MODE SUPPORT
--------------------------------------------------------------*/
@media (prefers-color-scheme: dark) {
  .i18n-link {
    color: var(--i18n-text);
  }

  .i18n-link:hover {
    color: var(--i18n-text-hover);
  }

  .i18n-link .i18n-cur::after {
    background: linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.8),
      rgba(255, 255, 255, 0.6),
      rgba(255, 255, 255, 0.4)
    );
    box-shadow: 0 0 6px rgba(255, 255, 255, 0.4),
      0 0 12px rgba(255, 255, 255, 0.3);
  }

  html[dir="rtl"] .i18n-link .i18n-cur::after {
    background: linear-gradient(
      270deg,
      rgba(255, 255, 255, 0.8),
      rgba(255, 255, 255, 0.6),
      rgba(255, 255, 255, 0.4)
    );
  }

  .i18n-link:hover .i18n-cur::after {
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.6),
      0 0 16px rgba(255, 255, 255, 0.4);
  }
}

/*--------------------------------------------------------------
# PREMIUM FOCUS STATES
--------------------------------------------------------------*/
.i18n-link:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 4px;
  box-shadow: var(--i18n-shadow-hover), var(--i18n-glow),
    0 0 0 4px rgba(37, 99, 235, 0.15);
  transform: scale(var(--i18n-scale-hover)) rotate(0.5deg);
  --i18n-rotate: 0.5deg;
}

/*--------------------------------------------------------------
# ACCESSIBILITY ENHANCEMENTS
--------------------------------------------------------------*/
/* High contrast mode support */
@media (prefers-contrast: high) {
  .i18n-link {
    border: 2px solid currentColor;
    background: transparent;
  }

  .i18n-link:focus-visible {
    outline-width: 3px;
  }

  .i18n-link .i18n-cur::after {
    background: currentColor;
  }
}

/*--------------------------------------------------------------
# REDUCED MOTION SUPPORT
--------------------------------------------------------------*/
@media (prefers-reduced-motion: reduce) {
  .i18n-link {
    transition: none;
  }

  .i18n-link:hover {
    transform: none;
  }

  .i18n-link .i18n-cur::after {
    transition: none;
  }

  .i18n-link:hover .i18n-cur::after {
    transform: scaleX(0);
  }
}

/*--------------------------------------------------------------
# PREMIUM RESPONSIVE DESIGN
--------------------------------------------------------------*/
@media (max-width: 768px) {
  .i18n-link {
    top: 8px;
    padding: 0.35rem 0.5rem;
    font-size: 11px;
    gap: 0.25rem;
    border-radius: 8px;
    --i18n-scale-hover: 1.02;
  }
}

@media (max-width: 480px) {
  .i18n-link {
    top: 6px;
    padding: 0.3rem 0.45rem;
    font-size: 10px;
    gap: 0.2rem;
    border-radius: 6px;
    --i18n-scale-hover: 1.01;
  }
}

/*--------------------------------------------------------------
# PRINT STYLES
--------------------------------------------------------------*/
@media print {
  .i18n-link {
    display: none;
  }
}