/* Base */
:root {
  --bg: #f5f7fa;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #1976d2;
  --primary-contrast: #ffffff;
  --border: #e5e7eb;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

/* Header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.app-header h1 {
  margin: 0;
  font-size: 1.25rem;
}
.install-btn {
  padding: 8px 12px;
  border: 1px solid var(--primary);
  background: var(--primary);
  color: var(--primary-contrast);
  border-radius: 8px;
  cursor: pointer;
}
.install-btn[hidden] { display: none; }

/* Layout */
.container {
  max-width: 960px;
  margin: 24px auto;
  padding: 0 16px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 800px) {
  .container { grid-template-columns: 1fr 1fr; }
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}
.card h2 {
  margin-top: 0;
}

/* Form */
.form { display: grid; gap: 12px; }
.field { display: grid; gap: 6px; }
label { color: var(--muted); font-size: 0.9rem; }
input[type="text"], input[type="date"], textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
}
textarea { resize: vertical; }
.actions { display: flex; gap: 8px; }
button.primary {
  background: var(--primary);
  color: var(--primary-contrast);
  border: none;
  padding: 10px 14px;
  border-radius: 8px;
  cursor: pointer;
}
button.secondary {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
  padding: 10px 14px;
  border-radius: 8px;
  cursor: pointer;
}
button:hover { filter: brightness(1.05); }

/* Entries */
.entries { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.entry-item {
  display: grid;
  gap: 6px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
}
.entry-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.entry-title { font-weight: 600; }
.entry-date { color: var(--muted); font-size: 0.9rem; }
.entry-desc { white-space: pre-wrap; }
.entry-actions { display: flex; gap: 8px; }
.entry-actions button {
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
}
button.delete { border: 1px solid #ef4444; color: #ef4444; background: transparent; }
button.delete:hover { background: #fee2e2; }

/* Empty state */
.empty { color: var(--muted); text-align: center; }

/* Footer */
.footer {
  text-align: center;
  padding: 24px 16px;
  color: var(--muted);
}
.footer a {
  text-decoration: none;
  color: inherit;
}
.footer a:hover {
  text-decoration: none;
    color: var(--primary);
}