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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  background: #f7f7f5;
  color: #37352f;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 2rem 1rem;
}

#app {
  width: 100%;
  max-width: 480px;
}

h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.date {
  font-size: 0.875rem;
  color: #787774;
  margin-bottom: 1.5rem;
}

.loading {
  text-align: center;
  padding: 3rem 0;
  color: #787774;
}

/* Cards */
.card {
  background: #fff;
  border: 1px solid #e3e2de;
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.card h2 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.card .hint {
  font-size: 0.8125rem;
  color: #787774;
  margin-bottom: 0.75rem;
}

.hidden {
  display: none;
}

/* Buttons */
.btn-group {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.btn {
  appearance: none;
  border: 1px solid #e3e2de;
  background: #f7f7f5;
  border-radius: 6px;
  padding: 0.625rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: #37352f;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.btn:hover {
  background: #ededeb;
  border-color: #d3d3cf;
}

.btn:active {
  background: #e3e2de;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-water {
  background: #dbeafe;
  border-color: #93c5fd;
  color: #1e40af;
}

.btn-water:hover {
  background: #bfdbfe;
}

.btn-water:active {
  background: #93c5fd;
}

/* All-done card */
#all-done {
  text-align: center;
  padding: 3rem 1.25rem;
}

#all-done h2 {
  font-size: 1.25rem;
  color: #787774;
}