/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Color Palette */
  --bg-primary: #0a0a0f;
  --bg-secondary: #141420;
  --bg-tertiary: #1e1e2e;
  --text-primary: #e0e0ff;
  --text-secondary: #a0a0c0;
  --accent-1: #6366f1;
  --accent-2: #8b5cf6;
  --accent-3: #ec4899;
  --border-color: #2a2a40;
  --hover-bg: #252535;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
  --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

#app {
  width: 100%;
  height: 100%;
  position: relative;
}

.view {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  opacity: 1;
  transition: opacity var(--transition-normal);
}

.view.hidden {
  opacity: 0;
  pointer-events: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: 3rem;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2), var(--accent-3));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% 200%;
  animation: gradientShift 8s ease infinite;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

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

/* Buttons */
button {
  cursor: pointer;
  border: none;
  outline: none;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 8px;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

button:hover {
  background: var(--hover-bg);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

button:active {
  transform: translateY(0);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

button.primary {
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  color: white;
}

button.primary:hover {
  box-shadow: var(--shadow-glow);
}

/* Input Fields */
input[type="text"],
input[type="search"] {
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  padding: var(--spacing-sm);
  border-radius: 8px;
  outline: none;
  transition: all var(--transition-fast);
}

input[type="text"]:focus,
input[type="search"]:focus {
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Loading Indicator */
.loading {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 10, 15, 0.95);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  gap: var(--spacing-md);
}

.spinner {
  width: 60px;
  height: 60px;
  border: 4px solid var(--border-color);
  border-top-color: var(--accent-1);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading p {
  color: var(--text-secondary);
  font-size: 1.125rem;
}

/* Keyboard Shortcuts Hint */
.keyboard-hint {
  position: fixed;
  bottom: var(--spacing-md);
  right: var(--spacing-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 8px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  opacity: 0.7;
  transition: opacity var(--transition-fast);
  pointer-events: none;
  z-index: 100;
}

.keyboard-hint:hover {
  opacity: 1;
}

.keyboard-hint kbd {
  background: var(--bg-tertiary);
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  margin: 0 4px;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-1);
}

/* Utility Classes */
.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

/* Responsive Design */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }

  h1 {
    font-size: 2rem;
  }

  .keyboard-hint {
    display: none;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 13px;
  }
}