/* Apple-Style Design System for Agent Workshop */

/* System Font Stack with Apple Priority */
:root {
  --font-system: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
                 "Helvetica Neue", "Helvetica", "Arial", sans-serif;
  --font-mono: "SF Mono", "Monaco", "Cascadia Code", "Roboto Mono", monospace;

  /* Apple-inspired Color Palette */
  --color-primary: #007AFF;
  --color-primary-hover: #0051D5;
  --color-secondary: #5856D6;
  --color-success: #34C759;
  --color-warning: #FF9500;
  --color-danger: #FF3B30;
  --color-info: #5AC8FA;

  /* Neutral Colors */
  --color-white: #FFFFFF;
  --color-black: #000000;
  --color-gray-50: #F9FAFB;
  --color-gray-100: #F2F2F7;
  --color-gray-200: #E5E5EA;
  --color-gray-300: #D1D1D6;
  --color-gray-400: #C7C7CC;
  --color-gray-500: #8E8E93;
  --color-gray-600: #636366;
  --color-gray-700: #48484A;
  --color-gray-800: #3A3A3C;
  --color-gray-900: #2C2C2E;

  /* Glass Morphism */
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.18);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  --glass-blur: 20px;

  /* Dark Mode Glass */
  --dark-glass-bg: rgba(28, 28, 30, 0.72);
  --dark-glass-border: rgba(255, 255, 255, 0.08);

  /* Spacing System */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-2xl: 28px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-spring: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Dark Mode Variables */
@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #0A84FF;
    --color-primary-hover: #0066CC;
    --glass-bg: var(--dark-glass-bg);
    --glass-border: var(--dark-glass-border);
  }
}

/* Base Reset & Typography */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-system);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-gray-900);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
  overflow-x: hidden;
}

/* Animated Background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(120, 219, 255, 0.2) 0%, transparent 50%);
  animation: backgroundShift 30s ease infinite;
  z-index: -1;
}

@keyframes backgroundShift {
  0%, 100% { transform: rotate(0deg) scale(1); }
  25% { transform: rotate(90deg) scale(1.1); }
  50% { transform: rotate(180deg) scale(1); }
  75% { transform: rotate(270deg) scale(1.1); }
}

/* Glass Container */
.glass-container {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--glass-shadow);
  padding: var(--space-xl);
  transition: all var(--transition-base);
}

.glass-container:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.12);
}

/* Navigation Bar */
.nav-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
  padding: 0 var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-gray-900);
}

.nav-logo i {
  font-size: 24px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  border: none;
  border-radius: var(--radius-full);
  font-family: var(--font-system);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:active::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-white);
  box-shadow: 0 4px 15px rgba(0, 122, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 122, 255, 0.4);
}

.btn-secondary {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  color: var(--color-gray-700);
  border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
  background: var(--color-gray-100);
  transform: translateY(-1px);
}

.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--radius-md);
}

/* Input Fields */
.input-group {
  position: relative;
  margin-bottom: var(--space-lg);
}

.input-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-gray-600);
  margin-bottom: var(--space-xs);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.input-field {
  width: 100%;
  padding: var(--space-md);
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  font-family: var(--font-system);
  font-size: 16px;
  color: var(--color-gray-900);
  transition: all var(--transition-base);
}

.input-field:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.input-field::placeholder {
  color: var(--color-gray-400);
}

/* Cards */
.card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(45deg,
    transparent,
    var(--color-primary),
    var(--color-secondary),
    transparent);
  border-radius: var(--radius-lg);
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: -1;
}

.card:hover::before {
  opacity: 1;
  animation: cardGlow 3s linear infinite;
}

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

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--glass-border);
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-gray-900);
}

.card-body {
  color: var(--color-gray-600);
}

/* Tabs */
.tabs {
  display: flex;
  gap: var(--space-xs);
  padding: var(--space-xs);
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-xl);
}

.tab {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-system);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-gray-600);
  cursor: pointer;
  transition: all var(--transition-base);
}

.tab:hover {
  color: var(--color-gray-900);
}

.tab.active {
  background: var(--color-white);
  color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Floating Action Button */
.fab {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-white);
  border: none;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(0, 122, 255, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  transition: all var(--transition-spring);
  z-index: 900;
}

.fab:hover {
  transform: scale(1.1) rotate(90deg);
  box-shadow: 0 12px 32px rgba(0, 122, 255, 0.6);
}

/* Loading Animation */
.loading {
  display: inline-block;
  position: relative;
  width: 80px;
  height: 80px;
}

.loading div {
  position: absolute;
  border: 4px solid var(--color-primary);
  opacity: 1;
  border-radius: 50%;
  animation: loading-ripple 1s cubic-bezier(0, 0.2, 0.8, 1) infinite;
}

.loading div:nth-child(2) {
  animation-delay: -0.5s;
}

@keyframes loading-ripple {
  0% {
    top: 36px;
    left: 36px;
    width: 0;
    height: 0;
    opacity: 0;
  }
  4.9% {
    top: 36px;
    left: 36px;
    width: 0;
    height: 0;
    opacity: 0;
  }
  5% {
    top: 36px;
    left: 36px;
    width: 0;
    height: 0;
    opacity: 1;
  }
  100% {
    top: 0px;
    left: 0px;
    width: 72px;
    height: 72px;
    opacity: 0;
  }
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(5px);
  z-index: 2000;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.modal.show {
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
}

.modal-content {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.9);
  transition: transform var(--transition-spring);
}

.modal.show .modal-content {
  transform: scale(1);
}

/* Tooltips */
.tooltip {
  position: relative;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  background: var(--color-gray-900);
  color: var(--color-white);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: 12px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.tooltip:hover::after {
  opacity: 1;
}

/* Progress Bar */
.progress {
  width: 100%;
  height: 8px;
  background: var(--glass-bg);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
  position: relative;
  overflow: hidden;
}

.progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  animation: progress-shine 2s linear infinite;
}

@keyframes progress-shine {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* Switches */
.switch {
  position: relative;
  display: inline-block;
  width: 51px;
  height: 31px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.switch-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-gray-300);
  transition: var(--transition-base);
  border-radius: var(--radius-full);
}

.switch-slider:before {
  position: absolute;
  content: '';
  height: 27px;
  width: 27px;
  left: 2px;
  bottom: 2px;
  background: var(--color-white);
  transition: var(--transition-base);
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

input:checked + .switch-slider {
  background: var(--color-success);
}

input:checked + .switch-slider:before {
  transform: translateX(20px);
}

/* Code Blocks */
.code-block {
  background: var(--color-gray-900);
  color: var(--color-gray-100);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  overflow-x: auto;
  position: relative;
}

.code-block::before {
  content: attr(data-language);
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  background: var(--color-gray-700);
  color: var(--color-gray-300);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: 11px;
  text-transform: uppercase;
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideIn {
  from {
    transform: translateX(-100%);
  }
  to {
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

.animate-fade-in {
  animation: fadeIn var(--transition-base) ease-out;
}

.animate-slide-in {
  animation: slideIn var(--transition-base) ease-out;
}

.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --space-xl: 24px;
    --space-2xl: 32px;
    --space-3xl: 48px;
  }

  .nav-bar {
    padding: 0 var(--space-md);
  }

  .fab {
    bottom: var(--space-lg);
    right: var(--space-lg);
  }

  .modal-content {
    padding: var(--space-xl);
  }
}

/* Smooth Scrolling */
html {
  scroll-behavior: smooth;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--glass-bg);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, var(--color-primary-hover), var(--color-secondary));
}