:root {
  --green-dark: #1b5e20;
  --green-mid: #2e7d32;
  --green-light: #4caf50;
  --green-bg: #e8f5e9;
  --amber: #f57c00;
  --amber-light: #fff3e0;
  --red: #c62828;
  --red-light: #ffebee;
  --blue: #1565c0;
  --blue-light: #e3f2fd;
  --grey-100: #f5f5f5;
  --grey-200: #eeeeee;
  --grey-400: #bdbdbd;
  --grey-600: #757575;
  --grey-800: #424242;
  --white: #ffffff;
  --shadow: 0 2px 8px rgba(0,0,0,0.1);
  --radius: 12px;
}

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

html { overflow-x: hidden; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--grey-100);
  color: var(--grey-800);
  min-height: 100vh;
  padding-bottom: 60px;
  max-width: 100vw;
  overflow-x: hidden;
}

header {
  background: linear-gradient(135deg, var(--green-dark), var(--green-mid));
  color: white;
  padding: 16px 20px;
  text-align: center;
}

header h1 { font-size: 1.4rem; font-weight: 600; }

.logo {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  margin-bottom: 4px;
}

/* Tab navigation */
.tab-bar {
  display: flex;
  background: var(--green-mid);
  position: sticky;
  top: 0;
  z-index: 100;
}

.tab {
  flex: 1;
  padding: 12px 8px;
  border: none;
  background: transparent;
  color: rgba(255,255,255,0.7);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border-bottom: 3px solid transparent;
}

.tab.active {
  color: white;
  border-bottom-color: white;
  background: rgba(255,255,255,0.1);
}

.tab-content { display: none; }
.tab-content.active { display: block; }

/* Sub-tab navigation */
.sub-tab-bar {
  display: flex;
  overflow-x: auto;
  background: var(--green-light);
  -webkit-overflow-scrolling: touch;
}

.sub-tab-bar::-webkit-scrollbar { display: none; }

.sub-tab {
  padding: 10px 14px;
  border: none;
  background: transparent;
  color: rgba(255,255,255,0.8);
  font-size: 0.8rem;
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: all 0.2s;
}

.sub-tab.active {
  color: white;
  border-bottom-color: white;
  background: rgba(255,255,255,0.15);
}

.subtab-content { display: none; }
.subtab-content.active { display: block; }

/* Cards */
.card {
  background: var(--white);
  margin: 12px;
  padding: 16px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--green-dark);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--green-bg);
}

.form-section {
  font-size: 0.85rem;
  color: var(--grey-600);
  margin: 12px 0 8px;
}

/* Forms */
form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

input, select, textarea {
  padding: 10px 12px;
  border: 1.5px solid var(--grey-200);
  border-radius: 8px;
  font-size: 0.9rem;
  transition: border-color 0.2s;
  background: var(--white);
}

input:focus, select:focus {
  outline: none;
  border-color: var(--green-light);
  box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.15);
}

.row {
  display: flex;
  gap: 10px;
}

.field { flex: 1; }

.field label {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--grey-600);
  margin-bottom: 4px;
}

/* Buttons */
.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn.primary {
  background: var(--green-mid);
  color: white;
}

.btn.primary:hover { background: var(--green-dark); }

.btn.danger {
  background: var(--red);
  color: white;
  padding: 6px 12px;
  font-size: 0.75rem;
}

.btn.small {
  padding: 4px 10px;
  font-size: 0.75rem;
}

/* Data lists */
.data-list { display: flex; flex-direction: column; gap: 8px; }

.data-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background: var(--grey-100);
  border-radius: 8px;
  font-size: 0.85rem;
  gap: 8px;
}

.data-row .info { flex: 1; }

.data-row .date {
  font-size: 0.75rem;
  color: var(--grey-600);
}

.data-row .main-text {
  font-weight: 500;
  color: var(--grey-800);
}

.data-row .sub-text {
  font-size: 0.8rem;
  color: var(--grey-600);
}

.egg-stats {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.egg-stat {
  text-align: center;
  padding: 6px 12px;
  background: var(--green-bg);
  border-radius: 8px;
}

.egg-stat .num {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--green-dark);
}

.egg-stat .label {
  font-size: 0.7rem;
  color: var(--grey-600);
}

/* Egg averages */
.egg-averages {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 12px;
}

.avg-card {
  padding: 12px;
  border-radius: 10px;
  border-left: 4px solid;
}

.avg-card.week {
  background: #e8f5e9;
  border-left-color: #2e7d32;
}

.avg-card.month {
  background: #e3f2fd;
  border-left-color: #1565c0;
}

.avg-label {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.avg-row {
  display: flex;
  gap: 12px;
  font-size: 0.85rem;
  color: #424242;
  flex-wrap: wrap;
}

.avg-total {
  font-size: 0.8rem;
  color: #757575;
  margin-top: 4px;
}

.avg-total strong {
  color: #1b5e20;
}

/* Summary stats */
.summary-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: 12px;
}

.stat-box {
  text-align: center;
  padding: 12px 8px;
  background: var(--blue-light);
  border-radius: 8px;
}

.stat-box .num {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--blue);
}

.stat-box .label {
  font-size: 0.7rem;
  color: var(--grey-600);
}

/* Fulfilled badge */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.7rem;
  font-weight: 600;
}

.badge.pending { background: var(--amber-light); color: var(--amber); }
.badge.done { background: var(--green-bg); color: var(--green-dark); }

/* Tag colour indicators */
.tag-dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
  border: 1px solid rgba(0,0,0,0.15);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  padding: 10px 24px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  z-index: 1000;
  animation: fadeInUp 0.3s ease;
  transition: opacity 0.3s;
}

.toast.success { background: var(--green-mid); color: white; }
.toast.error { background: var(--red); color: white; }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* Empty state */
.empty {
  text-align: center;
  padding: 24px;
  color: var(--grey-400);
  font-size: 0.9rem;
}

footer {
  text-align: center;
  padding: 16px;
  color: var(--grey-400);
  font-size: 0.75rem;
}

/* Phone portrait fixes */
input, select, textarea {
  max-width: 100%;
  min-width: 0;
}

form {
  max-width: 100%;
  overflow: hidden;
}

.card {
  overflow: hidden;
}

/* Responsive */
@media (max-width: 480px) {
  header { padding: 12px 16px; }
  header h1 { font-size: 1.2rem; }
  .logo { width: 48px; height: 48px; }
  .sub-tab { font-size: 0.72rem; padding: 8px 8px; }
  .row { flex-direction: column; gap: 8px; }
  .egg-stats { gap: 8px; }
  .data-row {
    flex-wrap: wrap;
    gap: 6px;
    padding: 10px 10px;
    font-size: 0.82rem;
  }
  .data-row .info { min-width: 0; }
  .data-row .btn.danger,
  .data-row .btn.small {
    flex-shrink: 0;
  }
  .badge { flex-shrink: 0; }
  .card { margin: 8px; padding: 12px; }
  .card h3 { font-size: 0.92rem; }
  .egg-stat { padding: 4px 8px; }
  .egg-stat .num { font-size: 1.1rem; }
  .summary-stats { grid-template-columns: repeat(2, 1fr); }
  .stat-box .num { font-size: 1.2rem; }
  input, select, textarea { font-size: 16px; } /* prevent iOS zoom */
}

@media (max-width: 360px) {
  .tab { font-size: 0.78rem; padding: 10px 4px; }
  .sub-tab { font-size: 0.68rem; padding: 8px 6px; }
  .data-row { font-size: 0.78rem; }
}