/* Modern Design Enhancements for SecureDicomTransfer */

/* CSS Variables */
:root {
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --danger-gradient: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Rotating Gradient Borders */
.gradient-border-hover {
  position: relative;
  background: var(--bg-card);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.gradient-border-hover::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--primary-gradient);
  border-radius: 16px;
  opacity: 0;
  transition: var(--transition);
  z-index: -1;
}

.gradient-border-hover:hover::before {
  opacity: 1;
  animation: rotate-gradient 3s linear infinite;
}

@keyframes rotate-gradient {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Enhanced File Queue Animations */
.file-queue-item {
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.file-queue-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: left 0.5s;
}

.file-queue-item:hover::before {
  left: 100%;
}

.file-queue-item:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

/* Status Color Coding */
.status-completed {
  background: var(--success-gradient);
  color: white;
  box-shadow: 0 4px 12px rgba(79, 172, 254, 0.3);
}

.status-uploading {
  background: var(--primary-gradient);
  color: white;
  animation: pulse-glow 2s ease-in-out infinite;
}

.status-failed {
  background: var(--danger-gradient);
  color: white;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3); }
  50% { box-shadow: 0 4px 20px rgba(102, 126, 234, 0.6); }
}

/* Progress Bars with Glow */
.progress-modern {
  height: 12px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.progress-bar-modern {
  height: 100%;
  border-radius: 8px;
  background: var(--primary-gradient);
  transition: width 0.3s ease;
  box-shadow: 0 0 10px rgba(102, 126, 234, 0.5);
}

.progress-bar-modern::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  animation: shine 2s infinite;
}

@keyframes shine {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* Loading Overlays */
.loading-overlay-modern {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.loading-overlay-modern.active {
  opacity: 1;
  visibility: visible;
}

.loading-spinner-modern {
  width: 60px;
  height: 60px;
  border: 4px solid rgba(255, 255, 255, 0.1);
  border-left: 4px solid var(--primary-gradient);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Glassmorphism */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  transition: var(--transition);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.glass-button {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  color: white;
  padding: 12px 24px;
  transition: var(--transition);
}

.glass-button:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* Focus States */
.btn:focus,
.nav-link:focus,
.form-control:focus {
  outline: 2px solid var(--primary-gradient);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

/* Utility Classes */
.text-gradient { background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.bg-glass { background: var(--glass-bg); backdrop-filter: blur(16px); }
.hover-lift { transition: var(--transition); }
.hover-lift:hover { transform: translateY(-8px); box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15); }

/* Modern Design Enhancements for SecureDicomTransfer */

/* ===== CSS VARIABLES ===== */
:root {
  /* Color Palette */
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --warning-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
  --danger-gradient: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
  --info-gradient: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
  
  /* Glassmorphism Colors */
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  
  /* Animation Timing */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-medium: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Spacing */
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;
}

/* ===== MICRO-INTERACTIONS & ANIMATIONS ===== */

/* Smooth Cubic-Bezier Transitions */
.smooth-transition {
  transition: all var(--transition-medium);
}

.smooth-transition-fast {
  transition: all var(--transition-fast);
}

.smooth-transition-slow {
  transition: all var(--transition-slow);
}

/* Sliding Effects for Queue Items */
.file-queue-item.slide-in {
  animation: slideInFromRight 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideInFromRight {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ===== VISUAL HIERARCHY ===== */

/* Status-Specific Color Coding with Gradient Backgrounds */
.status-warning {
  background: var(--warning-gradient);
  color: white;
  border: none;
  box-shadow: 0 4px 12px rgba(250, 112, 154, 0.3);
}

/* Progress Bars with Glow Effects and Shine Animations */
.progress-modern {
  height: 12px;
  border-radius: var(--border-radius-sm);
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
  position: relative;
  backdrop-filter: blur(10px);
}

.progress-bar-modern {
  height: 100%;
  border-radius: var(--border-radius-sm);
  background: var(--primary-gradient);
  position: relative;
  transition: width var(--transition-medium);
  box-shadow: 0 0 10px rgba(102, 126, 234, 0.5);
}

.progress-bar-modern::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  animation: shine 2s infinite;
}

@keyframes shine {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* Enhanced Typography with Gradient Text Effects */
.gradient-text {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
}

.gradient-text-animated {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  background-size: 200% 200%;
  animation: gradient-shift 3s ease infinite;
}

@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ===== BETTER LOADING STATES ===== */

/* Improved Loading Overlays with Blur Effects */
.loading-overlay-modern {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-medium);
}

.loading-overlay-modern.active {
  opacity: 1;
  visibility: visible;
}

.loading-spinner-modern {
  width: 60px;
  height: 60px;
  border: 4px solid rgba(255, 255, 255, 0.1);
  border-left: 4px solid var(--primary-gradient);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  position: relative;
}

.loading-spinner-modern::after {
  content: '';
  position: absolute;
  top: -4px;
  left: -4px;
  right: -4px;
  bottom: -4px;
  border: 2px solid transparent;
  border-top: 2px solid var(--secondary-gradient);
  border-radius: 50%;
  animation: spin 1.5s linear infinite reverse;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Animated Progress Indicators */
.progress-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px;
  background: var(--glass-bg);
  border-radius: var(--border-radius-md);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
}

.progress-dots {
  display: flex;
  gap: 4px;
}

.progress-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary-gradient);
  animation: progress-pulse 1.4s ease-in-out infinite both;
}

.progress-dot:nth-child(1) { animation-delay: -0.32s; }
.progress-dot:nth-child(2) { animation-delay: -0.16s; }
.progress-dot:nth-child(3) { animation-delay: 0s; }

@keyframes progress-pulse {
  0%, 80%, 100% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

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

/* Better Focus States */
.focus-visible {
  outline: 2px solid var(--primary-gradient);
  outline-offset: 2px;
  border-radius: var(--border-radius-sm);
}

.btn:focus,
.nav-link:focus,
.form-control:focus {
  outline: 2px solid var(--primary-gradient);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

/* Improved Color Contrast */
.high-contrast-text {
  color: #ffffff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.8);
}

.high-contrast-bg {
  background: rgba(0, 0, 0, 0.9);
  color: #ffffff;
}

/* Keyboard Navigation Support */
.keyboard-nav:focus {
  outline: 3px solid var(--primary-gradient);
  outline-offset: 2px;
  transform: scale(1.05);
}

/* Skip to Content Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary-gradient);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: var(--border-radius-sm);
  z-index: 10000;
  transition: var(--transition-fast);
}

.skip-link:focus {
  top: 6px;
}

/* ===== MODERN DESIGN ELEMENTS ===== */

/* Gradient Overlays and Borders */
.gradient-overlay {
  position: relative;
  overflow: hidden;
}

.gradient-overlay::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--primary-gradient);
  opacity: 0.1;
  transition: var(--transition-medium);
}

.gradient-overlay:hover::before {
  opacity: 0.2;
}

.gradient-border {
  position: relative;
  border-radius: var(--border-radius-lg);
  padding: 2px;
  background: var(--primary-gradient);
}

.gradient-border > * {
  background: var(--bg-card);
  border-radius: calc(var(--border-radius-lg) - 2px);
  padding: 16px;
}

/* Smooth Hover Transformations */
.hover-scale {
  transition: var(--transition-medium);
}

.hover-scale:hover {
  transform: scale(1.05);
}

.hover-rotate {
  transition: var(--transition-medium);
}

.hover-rotate:hover {
  transform: rotate(5deg);
}

/* Floating Action Button */
.fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: white;
  border: none;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
  cursor: pointer;
  transition: var(--transition-medium);
  z-index: 1000;
}

.fab:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.6);
}

/* Notification Badge */
.notification-badge {
  position: relative;
}

.notification-badge::after {
  content: attr(data-count);
  position: absolute;
  top: -8px;
  right: -8px;
  background: var(--danger-gradient);
  color: white;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: notification-pulse 2s infinite;
}

@keyframes notification-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.2); }
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
  .glass-card {
    margin: 8px;
  }
  
  .fab {
    bottom: 16px;
    right: 16px;
    width: 48px;
    height: 48px;
  }
  
  .gradient-border-hover:hover {
    transform: translateY(-2px);
  }
}

/* ===== DARK MODE SUPPORT ===== */
@media (prefers-color-scheme: dark) {
  :root {
    --glass-bg: rgba(0, 0, 0, 0.2);
    --glass-border: rgba(255, 255, 255, 0.1);
  }
}

/* ===== PERFORMANCE OPTIMIZATIONS ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===== UTILITY CLASSES ===== */
.text-gradient-primary { background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.text-gradient-secondary { background: var(--secondary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.text-gradient-success { background: var(--success-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

.bg-glass { background: var(--glass-bg); backdrop-filter: blur(16px); }
.border-glass { border: 1px solid var(--glass-border); }

.shadow-glow { box-shadow: 0 0 20px rgba(102, 126, 234, 0.3); }
.shadow-glow-success { box-shadow: 0 0 20px rgba(79, 172, 254, 0.3); }
.shadow-glow-warning { box-shadow: 0 0 20px rgba(250, 112, 154, 0.3); }
.shadow-glow-danger { box-shadow: 0 0 20px rgba(255, 154, 158, 0.3); }