:root {
  --sand: #f4efec;
  --page: #ffffff;
  --ink: #251f21;
  --ink-2: #585254;
  --ink-4: #c0bebf;
  --hairline: #eae9ea;
  --teal: #73a89a;
  --teal-dark: #4f8577;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--sand);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

#app {
  max-width: 640px;
  margin: 0 auto;
  background: var(--page);
  min-height: 100vh;
  padding: 28px 20px 48px;
}

.masthead h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
  font-size: 34px;
  letter-spacing: -0.02em;
  margin: 8px 0 4px;
}

.date {
  color: var(--teal-dark);
  font-weight: 600;
  margin: 0 0 12px;
}

.intro { color: var(--ink); margin: 0 0 20px; }

.hero {
  width: 100%;
  border-radius: 16px;
  display: block;
  margin-bottom: 8px;
}

.block { margin-top: 36px; }

.letter {
  color: var(--ink-2);
  font-size: 13px;
  margin: 0 0 2px;
}

h2 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
  font-size: 24px;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}

h3 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
  font-size: 19px;
  margin: 0 0 6px;
}

.prompt { color: var(--ink-2); font-size: 14px; margin: 0 0 12px; }

.fields { display: flex; flex-direction: column; gap: 8px; }

.field { display: flex; align-items: center; gap: 12px; }

.num {
  flex: 0 0 20px;
  text-align: right;
  color: var(--ink-2);
  font-size: 14px;
}

input[type="text"], textarea {
  width: 100%;
  border: 1px solid var(--hairline);
  border-radius: 6px;
  padding: 10px 12px;
  font: inherit;
  color: var(--ink);
  background: var(--page);
  min-height: 44px;
}

textarea { resize: vertical; }

input[type="text"]:focus, textarea:focus {
  outline: 2px solid var(--teal);
  outline-offset: 0;
  border-color: var(--teal);
}

::placeholder { color: var(--ink-4); }

.save-status { color: var(--ink-2); font-size: 13px; margin: 14px 0 0; min-height: 18px; }

.history { display: flex; flex-wrap: wrap; gap: 8px; }

.btn {
  display: inline-block;
  border: 1px solid var(--hairline);
  border-radius: 6px;
  background: var(--page);
  color: var(--ink);
  font: inherit;
  font-size: 14px;
  padding: 9px 14px;
  min-height: 44px;
  cursor: pointer;
}

.btn:active { background: var(--sand); }

.btn.secondary { color: var(--ink); }

.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }

.about { border-top: 1px solid var(--hairline); padding-top: 28px; }
.about p { color: var(--ink-2); font-size: 14px; }

#history { margin-top: 36px; }

ol { margin: 0; padding-left: 24px; color: var(--ink); }
ol li { margin-bottom: 4px; }

.past-text { margin: 0; }

.empty-note { color: var(--ink-2); font-size: 14px; }

.closing {
  margin-top: 40px;
  padding-top: 16px;
  border-top: 1px solid var(--hairline);
  color: var(--ink-2);
  font-size: 13px;
}

@media (min-width: 768px) {
  #app { padding: 40px 36px 64px; }
  .masthead h1 { font-size: 40px; }
}