:root {
  --bg: #f7f9fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --danger: #dc2626;
  --border: #e5e7eb;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

* {
  box-sizing: border-box;
}

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

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1rem;
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav-brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
}

.nav-links a {
  margin-left: 1rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--primary);
}

.period-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.nav-arrow {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
}

.nav-arrow:hover {
  background: var(--border);
}

.period-label {
  font-weight: 700;
  font-size: 1.1rem;
}

.period-date-form {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.period-date-form label {
  display: flex;
  flex-direction: column;
  font-size: 0.85rem;
  color: var(--muted);
}

.period-date-form input[type="date"] {
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
}

.today-link {
  margin-left: auto;
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  padding: 0.5rem 0;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 1rem;
}

.section {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem;
  margin-bottom: 1rem;
}

h2 {
  margin-top: 0;
  font-size: 1.15rem;
  color: var(--text);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
}

.summary-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  text-align: center;
}

.summary-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 0.25rem;
}

.summary-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

.summary-sub {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--muted);
  margin-top: 0.15rem;
}

.progress-bar {
  height: 6px;
  background: var(--border);
  border-radius: var(--radius);
  margin-top: 0.4rem;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: var(--radius);
  transition: width 0.2s ease;
  min-width: 2px;
}

.target-status-green {
  color: #16a34a;
}

.progress-fill.target-status-green {
  background-color: #16a34a;
}

.target-status-yellow {
  color: #ca8a04;
}

.progress-fill.target-status-yellow {
  background-color: #ca8a04;
}

.target-status-red {
  color: var(--danger);
}

.progress-fill.target-status-red {
  background-color: var(--danger);
}

.feed-countdown {
  color: var(--text);
}

.feed-countdown-green {
  color: #16a34a;
}

.feed-countdown-red {
  color: var(--danger);
}

.trend-status-green {
  color: #16a34a;
}

.trend-status-red {
  color: var(--danger);
}

.form-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.form-row label,
.feeding-form label,
.settings-form label {
  flex: 1 1 140px;
  display: flex;
  flex-direction: column;
  font-size: 0.85rem;
  color: var(--muted);
}

input[type="datetime-local"],
input[type="number"],
input[type="text"],
input[type="date"],
input[type="file"],
select {
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  margin-top: 0.25rem;
}

input[readonly] {
  background: var(--bg);
  color: var(--muted);
}

.timestamp-now-button {
  align-self: flex-start;
  width: auto;
  margin-top: 0.25rem;
}

.feeding-start-form .form-row {
  align-items: flex-end;
}

input.invalid {
  border-color: var(--danger);
  outline: 1px solid var(--danger);
}

button, .button {
  display: inline-block;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius);
  padding: 0.5rem 1rem;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
}

button:hover, .button:hover {
  background: var(--primary-hover);
}

button[type="button"] {
  background: white;
  color: var(--text);
  border: 1px solid var(--border);
}

button[type="button"]:hover {
  background: var(--bg);
}

button.danger {
  background: var(--danger);
}

.feeding-form,
.settings-form {
  width: 100%;
}

.settings-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
}

.settings-list li {
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--border);
}

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

.feeding-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.feeding-table th,
.feeding-table td {
  padding: 0.5rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

.feeding-table th {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
}

.feeding-table td.actions {
  text-align: right;
  white-space: nowrap;
}

.feeding-table button {
  padding: 0.35rem 0.65rem;
  font-size: 0.8rem;
  margin-left: 0.25rem;
}

.inline-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.inline-form input {
  flex: 1 1 100px;
  min-width: 80px;
}

.empty {
  text-align: center;
  color: var(--muted);
  padding: 1rem;
}

.help-text {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: -0.5rem;
  margin-bottom: 1rem;
}

.alert {
  background: #ecfdf5;
  border: 1px solid #10b981;
  color: #065f46;
  padding: 0.75rem 1rem;
}

.feed-variance {
  font-size: 0.8rem;
  margin-left: 0.25rem;
}

.feed-variance.over {
  color: #16a34a;
}

.feed-variance.under {
  color: var(--danger);
}

.feeding-cards {
  display: none;
  margin-top: 1rem;
}

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

.feeding-card-face {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
}

.feeding-card-main {
  flex: 1 1 0;
  min-width: 0;
}

.feeding-card-time {
  font-weight: 700;
  color: var(--text);
}

.feeding-card-time-sub {
  font-size: 0.8rem;
  color: var(--muted);
}

.feeding-card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  flex: 1 1 100%;
  order: 3;
}

.badge {
  display: inline-block;
  padding: 0.2rem 0.45rem;
  border-radius: var(--radius);
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-po {
  background: #dbeafe;
  color: #1e40af;
}

.badge-ng {
  background: #f3f4f6;
  color: #4b5563;
}

.badge-total {
  background: var(--text);
  color: white;
}

.badge-snack {
  background: #fde68a;
  color: #92400e;
}

.snack-checkbox {
  flex-direction: row !important;
  align-items: center;
  gap: 0.35rem;
  cursor: pointer;
}

.snack-checkbox input[type="checkbox"] {
  margin: 0;
}

.feeding-card-edit-fields .snack-checkbox {
  flex-direction: row !important;
}

.feeding-card-toggle {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--muted);
  cursor: pointer;
  padding: 0.5rem 0.65rem;
  font-size: 1rem;
  line-height: 1;
  min-width: 2.25rem;
  min-height: 2.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  -webkit-tap-highlight-color: transparent;
}

.feeding-card-toggle:active {
  background: var(--border);
}

.feeding-card-details {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

.feeding-card-details[hidden] {
  display: none;
}

.feeding-card-details:not([hidden]) {
  display: block;
}

.feeding-card-detail {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
}

.feeding-card-detail-label {
  color: var(--muted);
}

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

.feeding-card-actions button {
  flex: 1 1 auto;
}

.feeding-card.editing {
  background: var(--card);
  border-color: var(--primary);
}

.feeding-card-edit-fields {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.feeding-card-edit-fields label {
  display: flex;
  flex-direction: column;
  font-size: 0.85rem;
  color: var(--muted);
}

.feeding-card.editing .feeding-card-actions {
  margin-top: 0;
}

canvas {
  max-height: 300px;
}

@media (max-width: 600px) {
  .summary-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .feeding-table {
    display: none;
  }

  .feeding-cards {
    display: block;
  }

  .feeding-table th,
  .feeding-table td {
    padding: 0.4rem;
  }

  .feeding-table td.actions {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
  }

  .feeding-table button {
    margin-left: 0;
  }
}