:root {
  --color-bg: #f5f6f8;
  --color-surface: #ffffff;
  --color-primary: #232323; /* COL_DEFAULT */
  --color-primary-dark: #004a94; /* COLSTYLEBLUE */
  --color-text: #232323; /* COL_DEFAULT */
  --color-muted: #4e4e4e; /* COLSTYLEGRAY */
  --color-border: #c8c8c8; /* COL_CONTRA */
  --color-danger: #ec2d2d; /* COLSTYLERED */
  font-size: 16px;
}

* { box-sizing: border-box; }

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

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--color-primary);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 10;
}

.app-title { margin: 0; font-size: 1.25rem; }

.app-nav { display: flex; gap: 0.75rem; align-items: center; }
.app-nav[hidden] { display: none; }
.app-nav a { color: #fff; text-decoration: none; font-size: 0.9rem; }
.app-nav a:hover { text-decoration: underline; }
.app-nav button {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: #fff;
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  cursor: pointer;
}

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

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 0.75rem;
}

.card h3 { margin: 0 0 0.25rem; }
.card .meta { color: var(--color-muted); font-size: 0.85rem; }

form.card { display: flex; flex-direction: column; gap: 0.75rem; }

label { display: flex; flex-direction: column; gap: 0.25rem; font-size: 0.9rem; }

input, textarea, select {
  padding: 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font: inherit;
}

button.primary {
  background: var(--color-primary);
  color: #fff;
  border: none;
  padding: 0.6rem 1rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
}
button.primary:hover { background: var(--color-primary-dark); }
button.secondary {
  background: transparent;
  border: 1px solid var(--color-border);
  padding: 0.5rem 0.9rem;
  border-radius: 4px;
  cursor: pointer;
}

.error {
  color: #fff;
  background: var(--color-danger);
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  margin-bottom: 0.75rem;
}

.hint { color: var(--color-muted); font-size: 0.85rem; }

.list-actions { display: flex; gap: 0.5rem; margin-top: 0.5rem; }

.comment { border-top: 1px solid var(--color-border); padding-top: 0.5rem; margin-top: 0.5rem; }