/* Custom properties for theme tokens */
:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* HSL Tailored Colors - Svelte orange */
  --hue: 15;
  --bg-app: hsl(var(--hue), 20%, 96%);
  --bg-card: hsl(var(--hue), 30%, 100%);
  --bg-border: hsl(var(--hue), 15%, 88%);
  
  --text-main: hsl(var(--hue), 30%, 15%);
  --text-muted: hsl(var(--hue), 15%, 45%);
  
  --primary: hsl(var(--hue), 85%, 55%);
  --primary-hover: hsl(var(--hue), 85%, 48%);
  --primary-bg: hsl(var(--hue), 85%, 96%);
  
  --accent: hsl(200, 85%, 45%);
  --success: hsl(150, 75%, 35%);
  --success-bg: hsl(150, 75%, 96%);
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.dark {
  --bg-app: hsl(var(--hue), 22%, 8%);
  --bg-card: hsl(var(--hue), 20%, 12%);
  --bg-border: hsl(var(--hue), 18%, 18%);
  
  --text-main: hsl(var(--hue), 15%, 92%);
  --text-muted: hsl(var(--hue), 12%, 62%);
  
  --primary: hsl(var(--hue), 90%, 65%);
  --primary-hover: hsl(var(--hue), 90%, 58%);
  --primary-bg: hsl(var(--hue), 40%, 18%);
  
  --accent: hsl(200, 80%, 55%);
  --success: hsl(150, 70%, 55%);
  --success-bg: hsl(150, 45%, 15%);
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
}

/* Global Reset */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-main);
  transition: background-color 0.3s ease, color 0.3s ease;
}

.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-app);
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--bg-border);
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  font-size: 1.75rem;
  animation: spin 8s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.header-logo h1 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.025em;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.connection-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.375rem 0.75rem;
  border-radius: 9999px;
  background: var(--bg-app);
  border: 1px solid var(--bg-border);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #cbd5e1;
}

.status-dot.connected {
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
}

.status-dot.mock {
  background: #f59e0b;
  box-shadow: 0 0 8px #f59e0b;
}

/* Layout */
.app-main {
  flex: 1;
  padding: 2rem;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

/* Card Styling */
.card {
  background: var(--bg-card);
  border: 1px solid var(--bg-border);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 0;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 0;
  margin-bottom: 1.25rem;
}

/* Pre / JSON Box */
.json-box {
  background: var(--bg-app);
  border: 1px solid var(--bg-border);
  border-radius: 8px;
  padding: 1rem;
  font-family: monospace;
  font-size: 0.8rem;
  overflow-x: auto;
  margin: 0;
}

/* Interactive Components */
.tool-row {
  margin-bottom: 1.5rem;
}

.tool-row h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.tool-row.divider {
  border-top: 1px dashed var(--bg-border);
  padding-top: 1.25rem;
}

.input-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.math-operator {
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--text-muted);
}

input[type="text"], input[type="number"] {
  flex: 1;
  background: var(--bg-app);
  border: 1px solid var(--bg-border);
  color: var(--text-main);
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.2s ease;
}

input[type="text"]:focus, input[type="number"]:focus {
  border-color: var(--primary);
}

button {
  background: var(--primary);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  padding: 0.5rem 1rem;
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.2s ease;
}

button:hover {
  background-color: var(--primary-hover);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.result-badge {
  margin-top: 0.75rem;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  font-size: 0.85rem;
  background: var(--primary-bg);
  color: var(--primary);
  border: 1px solid var(--primary);
  word-break: break-all;
}

.result-badge.success {
  background: var(--success-bg);
  color: var(--success);
  border-color: var(--success);
}

/* Event Feed */
.event-feed {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-height: 300px;
  overflow-y: auto;
  background: var(--bg-app);
  border: 1px solid var(--bg-border);
  border-radius: 8px;
  padding: 0.75rem;
}

.feed-empty {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  padding: 2rem 0;
}

.event-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.5rem;
  border-bottom: 1px solid var(--bg-border);
  font-size: 0.8rem;
}

.event-item:last-child {
  border-bottom: none;
}

.event-time {
  color: var(--text-muted);
  font-size: 0.7rem;
}

.event-name {
  font-weight: 600;
  color: var(--accent);
}

.event-data {
  font-family: monospace;
  word-break: break-all;
}