*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

.page { display: none; flex-direction: column; flex: 1; overflow: hidden; }
.page.active { display: flex; }

button {
  font: inherit;
  cursor: pointer;
  border: none;
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  transition: background 0.15s, opacity 0.15s;
}

button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

button.primary {
  background: var(--accent);
  color: #fff;
}

button.primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

button.secondary {
  background: var(--bg-surface);
  color: var(--text);
  border: 1px solid var(--border);
}

button.secondary:hover:not(:disabled) {
  background: var(--bg-surface-hover);
}

input[type="text"], input[type="search"] {
  font: inherit;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  color: var(--text);
  outline: none;
}

input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0,0,0,0); border: 0;
}