/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue-50: #eff6ff;
  --blue-100: #dbeafe;
  --blue-400: #60a5fa;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --green-50: #f0fdf4;
  --green-100: #dcfce7;
  --green-400: #4ade80;
  --green-500: #22c55e;
  --green-600: #16a34a;
  --teal-500: #14b8a6;
  --teal-600: #0d9488;
  --amber-100: #fef3c7;
  --amber-500: #f59e0b;
  --amber-600: #d97706;
  --red-100: #fee2e2;
  --red-500: #ef4444;
  --red-600: #dc2626;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 10px 30px rgba(0,0,0,.1);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
}

html { font-size: 16px; }
body {
  font-family: var(--font);
  background: linear-gradient(135deg, #e0f2fe 0%, #ecfdf5 100%);
  min-height: 100vh;
  color: var(--gray-800);
  line-height: 1.5;
}

/* === Header === */
.app-header {
  background: white;
  box-shadow: 0 1px 0 var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--blue-700);
  letter-spacing: -.02em;
}
.week-badge {
  background: var(--blue-50);
  color: var(--blue-600);
  border: 1px solid var(--blue-100);
  border-radius: 20px;
  padding: .25rem .75rem;
  font-size: .8rem;
  font-weight: 600;
}

/* === Tabs === */
.tabs {
  background: white;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  gap: .25rem;
  overflow-x: auto;
}
.tab-btn {
  padding: .85rem 1.25rem;
  border: none;
  background: none;
  cursor: pointer;
  font-size: .9rem;
  font-weight: 500;
  color: var(--gray-500);
  border-bottom: 3px solid transparent;
  margin-bottom: -1px;
  white-space: nowrap;
  transition: color .15s, border-color .15s;
}
.tab-btn:hover { color: var(--blue-600); }
.tab-btn.active {
  color: var(--blue-600);
  border-bottom-color: var(--blue-500);
  font-weight: 600;
}

/* === Content Area === */
.content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem;
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* === Panel Header === */
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: .75rem;
}
.panel-header h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--gray-800);
}
.panel-actions { display: flex; gap: .5rem; flex-wrap: wrap; }

/* === Card === */
.card {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .55rem 1.1rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  font-size: .875rem;
  font-weight: 600;
  transition: transform .1s, box-shadow .1s, background .15s;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); box-shadow: none; }
.btn-primary { background: var(--blue-600); color: white; }
.btn-primary:hover { background: var(--blue-700); }
.btn-secondary { background: white; color: var(--gray-700); border: 1.5px solid var(--gray-300); }
.btn-secondary:hover { background: var(--gray-50); }
.btn-success { background: var(--green-500); color: white; }
.btn-success:hover { background: var(--green-600); }
.btn-danger { background: var(--red-500); color: white; }
.btn-danger:hover { background: var(--red-600); }
.btn-ghost { background: transparent; color: var(--gray-500); }
.btn-ghost:hover { background: var(--gray-100); }
.btn-sm { padding: .3rem .7rem; font-size: .8rem; }
.btn-icon { padding: .35rem; border-radius: 6px; background: none; border: none; cursor: pointer; font-size: 1rem; color: var(--gray-400); transition: background .15s, color .15s; }
.btn-icon:hover { background: var(--gray-100); color: var(--gray-700); }

/* === Kid Cards === */
.kid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
}
.kid-card {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: box-shadow .2s;
}
.kid-card:hover { box-shadow: var(--shadow-md); }
.kid-card-header {
  padding: 1.25rem 1.5rem 1rem;
  background: linear-gradient(135deg, var(--blue-500), var(--teal-500));
  color: white;
  position: relative;
}
.kid-card-header .kid-name {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -.01em;
}
.kid-card-header .kid-age {
  font-size: .85rem;
  opacity: .85;
  margin-top: .1rem;
}
.kid-stats {
  display: flex;
  gap: 1rem;
  margin-top: .75rem;
}
.stat-chip {
  background: rgba(255,255,255,.2);
  backdrop-filter: blur(4px);
  border-radius: 20px;
  padding: .3rem .75rem;
  font-size: .82rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: .3rem;
}
.kid-card-body { padding: 1rem 1.5rem 1.5rem; }
.chore-list { list-style: none; }
.chore-item {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .6rem 0;
  border-bottom: 1px solid var(--gray-100);
  transition: background .1s;
}
.chore-item:last-child { border-bottom: none; }
.chore-item.done .chore-name {
  text-decoration: line-through;
  color: var(--gray-400);
}
.chore-checkbox {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  border: 2px solid var(--gray-300);
  background: white;
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .15s, border-color .15s;
  font-size: .8rem;
}
.chore-checkbox.checked {
  background: var(--green-500);
  border-color: var(--green-500);
  color: white;
}
.chore-name { flex: 1; font-size: .9rem; }
.difficulty-badge {
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  padding: .15rem .5rem;
  border-radius: 4px;
}
.difficulty-badge.easy { background: var(--green-100); color: var(--green-600); }
.difficulty-badge.medium { background: var(--amber-100); color: var(--amber-600); }
.difficulty-badge.hard { background: var(--red-100); color: var(--red-600); }
.chore-pts { font-size: .78rem; font-weight: 700; color: var(--gray-400); white-space: nowrap; }
.no-chores {
  padding: 2rem;
  text-align: center;
  color: var(--gray-400);
  font-size: .9rem;
}

/* === Chore Table === */
.chore-table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.chore-table th {
  text-align: left;
  padding: .65rem .75rem;
  background: var(--gray-50);
  color: var(--gray-500);
  font-size: .78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  border-bottom: 1px solid var(--gray-200);
}
.chore-table td {
  padding: .75rem;
  border-bottom: 1px solid var(--gray-100);
  vertical-align: middle;
}
.chore-table tr:last-child td { border-bottom: none; }
.chore-table tr:hover td { background: var(--gray-50); }
.td-actions { display: flex; gap: .35rem; }

/* === Add Form === */
.add-form { margin-top: 1.5rem; border-top: 1px solid var(--gray-100); padding-top: 1.25rem; }
.add-form h3 { font-size: .95rem; font-weight: 700; margin-bottom: .85rem; color: var(--gray-700); }
.form-row { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; }
.form-input {
  padding: .55rem .75rem;
  border: 1.5px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: .875rem;
  transition: border-color .15s, box-shadow .15s;
  outline: none;
  flex: 1;
  min-width: 0;
}
.form-input:focus { border-color: var(--blue-400); box-shadow: 0 0 0 3px rgba(96,165,250,.15); }
.form-select {
  padding: .55rem .75rem;
  border: 1.5px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: .875rem;
  background: white;
  cursor: pointer;
  outline: none;
  transition: border-color .15s;
}
.form-select:focus { border-color: var(--blue-400); }
.form-group { margin-bottom: .85rem; }
.form-group label { display: block; font-size: .82rem; font-weight: 600; color: var(--gray-600); margin-bottom: .35rem; }

/* === Reward Cards === */
.reward-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.reward-card {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem 1rem;
  text-align: center;
  position: relative;
  transition: box-shadow .2s, transform .2s;
}
.reward-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.reward-emoji { font-size: 2.5rem; margin-bottom: .5rem; display: block; }
.reward-name { font-size: .9rem; font-weight: 700; color: var(--gray-800); margin-bottom: .4rem; }
.reward-pts {
  display: inline-block;
  background: var(--blue-50);
  color: var(--blue-600);
  font-size: .8rem;
  font-weight: 700;
  padding: .2rem .6rem;
  border-radius: 20px;
  margin-bottom: .75rem;
}
.reward-card-actions { display: flex; gap: .35rem; justify-content: center; }

/* === Redemption log in rewards === */
.redemption-log .log-entry { padding: .5rem 0; border-bottom: 1px solid var(--gray-100); font-size: .85rem; color: var(--gray-600); }
.redemption-log .log-entry:last-child { border-bottom: none; }

/* === History === */
.history-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
@media (max-width: 700px) { .history-grid { grid-template-columns: 1fr; } }
.log-list .log-entry { padding: .55rem 0; border-bottom: 1px solid var(--gray-100); font-size: .85rem; }
.log-list .log-entry:last-child { border-bottom: none; }
.log-meta { color: var(--gray-400); font-size: .75rem; margin-top: .1rem; }
.badge-muted { font-size: .75rem; font-weight: 500; color: var(--gray-400); }

/* === Redeem panel === */
.redeem-panel h3 { margin-bottom: .85rem; font-size: .95rem; font-weight: 700; color: var(--gray-700); }

/* === Modal === */
.modal {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.4);
  display: flex; align-items: center; justify-content: center;
  z-index: 200;
}
.modal.hidden { display: none; }
.modal-box {
  background: white;
  border-radius: var(--radius);
  padding: 2rem;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-md);
}
.modal-box h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 1.25rem; }
.modal-actions { display: flex; gap: .5rem; margin-top: 1.25rem; }

/* === Toast === */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--gray-800);
  color: white;
  padding: .75rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: .875rem;
  font-weight: 500;
  z-index: 300;
  box-shadow: var(--shadow-md);
  animation: slideUp .2s ease;
}
.toast.hidden { display: none; }
.toast.success { background: var(--green-600); }
.toast.error { background: var(--red-600); }
@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

/* === Misc === */
h3 { font-size: 1rem; font-weight: 700; margin-bottom: .75rem; }
.empty-state { text-align: center; padding: 2.5rem 1rem; color: var(--gray-400); font-size: .9rem; }
.streak-fire { margin-left: .2rem; }

/* === Responsive === */
@media (max-width: 600px) {
  .header-inner { padding: 0 1rem; }
  .content { padding: 1rem; }
  .tabs { padding: 0 .5rem; }
  .tab-btn { padding: .8rem .8rem; }
  .panel-header { flex-direction: column; align-items: flex-start; }
  .kid-cards { grid-template-columns: 1fr; }
  .form-row { flex-direction: column; align-items: stretch; }
  .form-row .btn { width: 100%; justify-content: center; }
  .chore-table { display: block; overflow-x: auto; }
}