:root {
  --color-background: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #6b6b6b;
  --color-border: #e5e5e5;
  --color-accent: #1a1a1a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-background);
  color: var(--color-text);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
}

nav {
  display: flex;
  gap: 1.5rem;
  padding: 1rem;
  border-bottom: 1px solid var(--color-border);
}

nav a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
}

nav a:hover {
  color: var(--color-text-secondary);
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 320px;
}

label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

input,
button {
  font-size: 1rem;
  padding: 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--color-border);
}

button {
  background: var(--color-accent);
  color: var(--color-background);
  border: none;
  cursor: pointer;
}

button:hover {
  opacity: 0.9;
}

@media (max-width: 480px) {
  main {
    padding: 1rem;
  }
}

.inbox-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.inbox-list li {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.inbox-list li a {
  flex: 1;
  display: flex;
  align-items: center;
  padding: 0.75rem 0;
  color: inherit;
  text-decoration: none;
}

.notes-icon {
  flex-shrink: 0;
  align-self: center;
}

.inbox-list li:last-child {
  border-bottom: none;
}

.fab {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 56px;
  height: 56px;
  padding: 0;
  border-radius: 50%;
  font-size: 1.75rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

dialog {
  border: none;
  border-radius: 8px;
  padding: 1.5rem;
  max-width: 360px;
  width: 90%;
}

dialog::backdrop {
  background: rgba(0, 0, 0, 0.3);
}

dialog textarea {
  font: inherit;
  resize: vertical;
  min-height: 4rem;
}

dialog menu {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}