/**
 * Enhanced Header Styles
 * 개선된 헤더 스타일 - 깔끔하고 모바일 최적화
 */

/* ==========================================================================
   Header Layout
   ========================================================================== */

.app-header {
  width: 100%;
  padding: var(--space-6) 0;
  margin-bottom: var(--space-6);
}

.header-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  position: relative;
}

/* ==========================================================================
   Title Section
   ========================================================================== */

.title-section {
  text-align: center;
  flex: 1;
}

.app-title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-size: clamp(var(--text-2xl), 6vw, var(--text-4xl));
  font-weight: var(--font-extrabold);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-2);
  
  /* Enhanced text gradient */
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-secondary-600));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  
  /* Better spacing for emojis */
  .title-emoji {
    font-size: 0.9em;
    filter: drop-shadow(0 2px 4px var(--shadow-color));
  }
  
  .title-text {
    font-weight: inherit;
    letter-spacing: -0.025em;
  }
}

.app-subtitle {
  font-size: clamp(var(--text-sm), 3.5vw, var(--text-lg));
  font-weight: var(--font-medium);
  color: var(--color-gray-600);
  line-height: var(--leading-snug);
  margin: 0;
  padding: 0 var(--space-4);
  max-width: 400px;
  margin: 0 auto;
}

/* ==========================================================================
   Header Controls
   ========================================================================== */

.header-controls {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--card);
  padding: var(--space-2);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

/* Language button styles */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-lg);
  background: var(--primary);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  color: var(--primary-foreground);
  box-shadow: var(--shadow);
  transition: all var(--transition-base);
  cursor: pointer;
  
  /* Hover effects */
  &:hover:not(:disabled) {
    background: var(--accent);
    border-color: var(--ring);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    color: var(--accent-foreground);
  }
  
  &:active {
    transform: translateY(0);
  }
  
  &:focus-visible {
    outline: 2px solid var(--ring);
    outline-offset: 2px;
  }
}

/* Language toggle specific styles */
.lang-toggle {
  gap: var(--space-1);
  min-width: 60px;
}

.lang-icon {
  font-size: var(--text-base);
  line-height: 1;
}

.lang-text {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  line-height: 1;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

/* Mobile Layout (default) */
@media (max-width: 767px) {
  .app-header {
    padding: var(--space-4) 0 var(--space-6) 0;
    margin-bottom: var(--space-4);
  }
  
  .header-content {
    gap: var(--space-3);
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
  
  .title-section {
    text-align: left;
    flex: 1;
  }
  
  .app-title {
    font-size: clamp(var(--text-xl), 5vw, var(--text-3xl));
    margin-bottom: var(--space-1);
    justify-content: flex-start;
    
    .title-emoji {
      font-size: 0.8em;
    }
  }
  
  .app-subtitle {
    font-size: clamp(var(--text-xs), 3vw, var(--text-base));
    padding: 0;
    text-align: left;
  }
  
  .header-controls {
    flex-shrink: 0;
    gap: var(--space-1);
  }
  
  
  .lang-toggle {
    padding: var(--space-2) var(--space-2);
    min-height: 36px;
    min-width: 50px;
    font-size: var(--text-xs);
    gap: 2px;
    
    .lang-icon {
      font-size: var(--text-sm);
    }
    
    .lang-text {
      font-size: var(--text-xs);
    }
  }
}

/* Tablet Layout */
@media (min-width: 768px) and (max-width: 1023px) {
  .header-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
  
  .title-section {
    text-align: left;
    flex: 1;
  }
  
  .header-controls {
    flex-shrink: 0;
    margin-top: var(--space-1);
  }
}

/* Desktop Layout */
@media (min-width: 1024px) {
  .header-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  
  .title-section {
    text-align: left;
    flex: 1;
  }
  
  .app-title {
    justify-content: flex-start;
  }
  
  .header-controls {
    flex-shrink: 0;
  }
}

/* Very Small Screens */
@media (max-width: 360px) {
  .app-title {
    gap: var(--space-1);
    
    .title-emoji {
      font-size: 0.7em;
    }
  }
  
  .app-subtitle {
    font-size: var(--text-xs);
    line-height: var(--leading-normal);
  }
  
  .header-controls {
    gap: 4px;
  }
  
  
  .lang-toggle {
    padding: var(--space-1) 6px;
    min-height: 32px;
    min-width: 40px;
    gap: 2px;
    
    .lang-icon {
      font-size: var(--text-xs);
    }
    
    .lang-text {
      font-size: 10px;
    }
  }
}

/* Landscape Mode for Mobile */
@media (max-width: 767px) and (orientation: landscape) {
  .app-header {
    padding: var(--space-3) 0 var(--space-4) 0;
    margin-bottom: var(--space-3);
  }
  
  .header-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-4);
  }
  
  .title-section {
    text-align: left;
  }
  
  .app-title {
    justify-content: flex-start;
    font-size: clamp(var(--text-lg), 4vw, var(--text-2xl));
    margin-bottom: var(--space-1);
  }
  
  .app-subtitle {
    font-size: clamp(10px, 2.5vw, var(--text-sm));
    text-align: left;
    padding: 0;
  }
  
  .header-controls {
    flex-shrink: 0;
    gap: var(--space-1);
  }
  
  
  .lang-toggle {
    min-height: 32px;
    padding: var(--space-1) var(--space-2);
    min-width: 45px;
  }
}

/* ==========================================================================
   Accessibility Enhancements
   ========================================================================== */

/* Focus States */
.lang-toggle:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
  background: var(--theme-bg-hover);
}

/* High Contrast Support */
@media (prefers-contrast: high) {
  .app-title {
    background: none;
    -webkit-text-fill-color: var(--theme-text-primary);
    color: var(--theme-text-primary);
  }
  
  .lang-toggle {
    border-width: 2px;
    border-color: var(--color-primary-600);
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  .lang-toggle {
    transition: none;
  }
  
  .lang-toggle:hover {
    transform: none;
  }
}

/* ==========================================================================
   Touch Device Optimizations
   ========================================================================== */

@media (hover: none) and (pointer: coarse) {
  .lang-toggle:hover {
    transform: none;
    box-shadow: var(--shadow-sm);
  }
  
  .lang-toggle:active {
    transform: scale(0.98);
    transition: transform 0.1s ease;
  }
  
  /* Touch feedback class for JavaScript */
  .lang-toggle.touch-active {
    transform: scale(0.96);
    transition: transform var(--transition-fast);
  }
}