*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
.hidden { display: none !important; }

:root {
  --red:       #C62828;
  --red-dark:  #B71C1C;
  --green:     #2E7D32;
  --green-bg:  #E8F5E9;
  --blue:      #1565C0;
  --blue-bg:   #E3F2FD;
  --text:      #212121;
  --sub:       #616161;
  --bg:        #F0F2F4;
  --surface:   #FFFFFF;
  --border:    #E0E0E0;
  --shadow:    0 2px 8px rgba(0,0,0,.10);
  --shadow-lg: 0 4px 20px rgba(0,0,0,.14);
  --visa:      #1A1F71;
  --mc:        #CC0000;
  --amex:      #0070C0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
}

/* ── Header ── */
header {
  background: var(--red);
  color: #fff;
  padding: 2rem 1rem 1.75rem;
  text-align: center;
}
.logo { font-size: 1.8rem; font-weight: 800; letter-spacing: -.5px; }
.tagline { margin-top: .4rem; opacity: .88; font-size: .95rem; }
.tagline-sub { margin-top: .25rem; font-size: .78rem; opacity: .55; letter-spacing: .02em; }

/* ── Layout ── */
main {
  max-width: 820px;
  margin: 0 auto;
  padding: 2rem 1rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* ── Input card ── */
.input-card {
  background: var(--surface);
  border-radius: 14px;
  padding: 1.75rem;
  box-shadow: var(--shadow);
}
.input-card h2 { font-size: 1.15rem; margin-bottom: 1.25rem; }

.form-group { margin-bottom: 1.1rem; }
.form-group label {
  display: block;
  font-size: .78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .6px;
  color: var(--sub);
  margin-bottom: .4rem;
}

select, input[type="number"], input[type="text"] {
  width: 100%;
  padding: .7rem 1rem;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  color: var(--text);
  background: #fff;
  transition: border-color .18s;
  -webkit-appearance: none;
  appearance: none;
}
select:focus, input[type="number"]:focus, input[type="text"]:focus {
  outline: none;
  border-color: var(--red);
}
select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='7' viewBox='0 0 12 7'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23757575' stroke-width='1.8' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

#store-search { margin-bottom: .5rem; }

/* ── Category filter chips ── */
.category-filters {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  margin-bottom: .5rem;
}
.cat-chip {
  padding: .3em .8em;
  border-radius: 20px;
  border: 1.5px solid var(--border);
  background: #fff;
  font-size: .74rem;
  font-weight: 600;
  color: var(--sub);
  cursor: pointer;
  transition: border-color .15s, background .15s, color .15s;
  white-space: nowrap;
  line-height: 1.4;
  font-family: inherit;
}
.cat-chip:hover { border-color: #BDBDBD; color: var(--text); }
.cat-chip.active { background: var(--red); border-color: var(--red); color: #fff; }

/* ── Store grid ── */
.store-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(88px, 1fr));
  gap: .15rem;
  max-height: 320px;
  overflow-y: auto;
  padding: .15rem;
}

.store-tile {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .45rem;
  padding: .9rem .45rem .75rem;
  border-radius: 10px;
  cursor: pointer;
  transition: background .15s;
  text-align: center;
  user-select: none;
}
.store-tile:hover  { background: rgba(0,0,0,.05); }
.store-tile:focus  { outline: none; background: rgba(0,0,0,.05); }
.store-tile.selected { background: rgba(198,40,40,.07); }

.store-tile-icon-wrap {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.store-tile-icon { font-size: 2.1rem; line-height: 1; }

.store-tile-icon-wrap svg {
  width: 56px;
  height: 56px;
  display: block;
  flex-shrink: 0;
}

.store-logo {
  width: 56px;
  height: 56px;
  object-fit: contain;
  border-radius: 6px;
  display: block;
}

.store-tile-name {
  font-size: .67rem;
  font-weight: 600;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  letter-spacing: .01em;
  color: var(--sub);
  line-height: 1.3;
  word-break: break-word;
}
.store-tile.selected .store-tile-name { color: var(--red); }

.store-grid-empty {
  font-size: .85rem;
  color: var(--sub);
  text-align: center;
  padding: 1.25rem;
  grid-column: 1 / -1;
}

/* ── Online / In-store toggle ── */

.amount-wrap { position: relative; }
.dollar {
  position: absolute; left: 1rem; top: 50%;
  transform: translateY(-50%);
  color: var(--sub); pointer-events: none;
}
.amount-wrap input { padding-left: 1.75rem; }
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; }
input[type="number"] { -moz-appearance: textfield; }

.btn-primary {
  width: 100%; padding: .85rem;
  background: var(--red); color: #fff;
  border: none; border-radius: 8px;
  font-size: 1rem; font-weight: 700;
  cursor: pointer;
  transition: background .18s, transform .1s;
  margin-top: .25rem;
}
.btn-primary:hover  { background: var(--red-dark); }
.btn-primary:active { transform: scale(.98); }

.error-msg { color: var(--red); font-size: .85rem; margin-top: .5rem; min-height: 1.2em; }

/* ── Results ── */
.results-section.hidden { display: none; }

.results-header h2 { font-size: 1rem; font-weight: 500; color: var(--sub); margin-bottom: .75rem; }
.results-header strong { color: var(--text); }

.store-note {
  background: #FFF8E1;
  border: 1px solid #FFD54F;
  border-radius: 8px;
  padding: .65rem .9rem;
  font-size: .83rem;
  color: #5D4037;
  margin-bottom: .75rem;
}

.loyalty-banner {
  display: flex; align-items: flex-start; gap: .7rem;
  background: var(--blue-bg);
  border: 1px solid #90CAF9;
  border-radius: 8px;
  padding: .8rem 1rem;
  font-size: .88rem;
  color: var(--blue);
  margin-bottom: .75rem;
}
.loy-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: .05rem; }

.results-list { display: flex; flex-direction: column; gap: .65rem; }

/* ── Single result card ── */
.result-card {
  background: var(--surface);
  border-radius: 12px;
  padding: 1.1rem 1.25rem;
  box-shadow: var(--shadow);
  display: flex; gap: .9rem; align-items: flex-start;
  border: 2px solid transparent;
  transition: box-shadow .18s;
}
.result-card:hover { box-shadow: var(--shadow-lg); }
.result-card.best {
  border-color: var(--green);
  background: var(--green-bg);
}

.medal { font-size: 1.45rem; flex-shrink: 0; width: 2.2rem; text-align: center; line-height: 1; padding-top: .1rem; }
.rank-num { font-size: .85rem; font-weight: 700; color: var(--sub); }

.result-body { flex: 1; min-width: 0; }

.top-row {
  display: flex; justify-content: space-between;
  align-items: flex-start; gap: .75rem; flex-wrap: wrap;
}

.card-id { display: flex; align-items: center; flex-wrap: wrap; gap: .35rem; }
.card-name { font-weight: 700; font-size: .97rem; }

.net-badge {
  font-size: .67rem; font-weight: 800;
  padding: .2em .55em; border-radius: 4px;
  text-transform: uppercase; letter-spacing: .4px;
  color: #fff;
}
.net-badge.visa       { background: var(--visa); }
.net-badge.mastercard { background: var(--mc);   }
.net-badge.amex       { background: var(--amex); }

.fee       { font-size: .77rem; color: var(--sub); }
.fee.no-fee { color: var(--green); font-weight: 700; }

.totals { text-align: right; flex-shrink: 0; }
.total-val  { display: block; font-size: 1.45rem; font-weight: 800; color: var(--green); line-height: 1.1; }
.total-pct  { font-size: .8rem; color: var(--sub); }

/* Bar */
.bar-track {
  margin: .65rem 0 .45rem;
  height: 5px; background: #E0E0E0;
  border-radius: 3px; overflow: hidden;
}
.bar-fill { height: 100%; background: var(--green); border-radius: 3px; transition: width .4s ease; }

/* Breakdown */
.breakdown { display: flex; flex-direction: column; gap: .15rem; }
.breakdown-row {
  display: flex; justify-content: space-between;
  align-items: baseline; gap: .75rem;
  font-size: .83rem;
}
.bl { color: var(--sub); flex-shrink: 1; min-width: 0; }
.bv { text-align: right; flex-shrink: 0; }
.earn-rate { font-weight: 600; color: var(--text); }
.earn-val  { color: var(--text); }

.loyalty-row .bl { color: var(--blue); font-weight: 600; }
.loyalty-row .bv { color: var(--blue); }

.rakuten-row .bl { color: #E65100; font-weight: 600; }
.rakuten-row .bv { color: #E65100; }

.card-note { font-size: .75rem; color: var(--sub); margin-top: .4rem; font-style: italic; }

/* ── Rakuten checkbox ── */
.rakuten-wrap { margin-top: -.2rem; }
.rakuten-wrap label { display: revert; }
.rakuten-label {
  display: flex; align-items: center; gap: .55rem;
  font-size: .9rem; font-weight: 400; color: var(--text);
  cursor: pointer;
  text-transform: none; letter-spacing: 0;
  padding: .6rem .85rem;
  background: #FFF3E0;
  border: 1px solid #FFCC80;
  border-radius: 8px;
}
.rakuten-label input[type="checkbox"] {
  width: 1.1rem; height: 1.1rem;
  accent-color: #E65100;
  flex-shrink: 0;
  cursor: pointer;
}
.rakuten-badge {
  font-size: .65rem; font-weight: 900; letter-spacing: .3px;
  padding: .2em .55em; border-radius: 4px;
  background: #E65100; color: #fff;
  flex-shrink: 0;
}
.rakuten-hint {
  font-size: .82rem; color: #E65100; font-weight: 700; margin-left: .1rem;
}
.rakuten-disclaimer {
  font-size: .78rem; color: #888; margin: .35rem 0 0 0; line-height: 1.4;
}

/* ── Rakuten active badge in results header ── */
.rakuten-active-badge {
  display: inline-block;
  background: #E65100; color: #fff;
  font-size: .7rem; font-weight: 800;
  padding: .2em .6em; border-radius: 5px;
  vertical-align: middle; margin-left: .4rem;
  letter-spacing: .3px;
}

/* ── About section ── */
details {
  background: var(--surface);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow);
}
summary {
  cursor: pointer; font-weight: 600;
  font-size: .88rem; color: var(--sub);
  user-select: none; list-style: none;
  display: flex; align-items: center; gap: .4rem;
}
summary::before { content: '▶'; font-size: .65rem; }
details[open] summary::before { content: '▼'; }

.info-body {
  margin-top: .9rem;
  font-size: .85rem; color: var(--sub); line-height: 1.7;
}
.info-body p  { margin-bottom: .5rem; }
.info-body ul { margin: .3rem 0 .5rem 1.3rem; }
.info-body li { margin-bottom: .2rem; }

/* ── My Cards section ── */
#my-cards-section details {
  background: var(--surface);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow);
}

.card-count-badge {
  display: inline-block;
  margin-left: .6rem;
  font-size: .7rem;
  font-weight: 700;
  padding: .2em .6em;
  border-radius: 20px;
  background: #E0E0E0;
  color: var(--sub);
  vertical-align: middle;
  letter-spacing: .2px;
}
.card-count-badge.active {
  background: var(--red);
  color: #fff;
}

.my-cards-body {
  margin-top: .9rem;
}

.my-cards-hint {
  font-size: .82rem;
  color: var(--sub);
  margin-bottom: .75rem;
}

.my-cards-actions {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: .85rem;
}

.btn-link {
  background: none;
  border: none;
  padding: 0;
  font-size: .82rem;
  font-weight: 600;
  color: var(--red);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.btn-link:hover { color: var(--red-dark); }

.my-cards-sep { color: var(--sub); font-size: .82rem; }

.card-checklist {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: .6rem 1.5rem;
}

.card-group { display: contents; }

.card-group-label {
  font-size: .7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .6px;
  color: var(--sub);
  margin-top: .35rem;
  grid-column: 1 / -1;
}

.card-checkbox-item {
  display: flex;
  align-items: center;
  gap: .45rem;
  font-size: .85rem;
  font-weight: 400;
  color: var(--text);
  cursor: pointer;
  text-transform: none;
  letter-spacing: 0;
}
.card-checkbox-item input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  accent-color: var(--red);
  flex-shrink: 0;
  cursor: pointer;
}
.card-checkbox-item span { line-height: 1.3; }

.cbi-no-fee {
  font-size: .65rem;
  font-weight: 700;
  color: var(--green);
  background: var(--green-bg);
  padding: .15em .45em;
  border-radius: 4px;
  flex-shrink: 0;
}

/* ── Loyalty checklist ── */
.loyalty-checklist {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: .5rem;
}

.loyalty-item {
  display: flex;
  align-items: flex-start;
  gap: .5rem;
  padding: .55rem .7rem;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.loyalty-item:hover { border-color: #BDBDBD; }
.loyalty-item:has(input:checked) {
  border-color: var(--red);
  background: #FFF5F5;
}

.loyalty-item input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  accent-color: var(--red);
  flex-shrink: 0;
  margin-top: .15rem;
  cursor: pointer;
}

.loyalty-item-text {
  display: flex;
  flex-direction: column;
  gap: .1rem;
}

.loyalty-item-name {
  font-size: .88rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}

.loyalty-item-desc {
  font-size: .72rem;
  color: var(--sub);
  line-height: 1.3;
}

/* Disclaimer */
.disclaimer { font-size: .78rem; color: var(--sub); margin-top: 1rem; font-style: italic; }

/* Footer */
footer {
  text-align: center; padding: 1.5rem 1rem;
  font-size: .8rem; color: var(--sub);
  border-top: 1px solid var(--border);
}

/* Responsive */
@media (max-width: 500px) {
  .top-row     { flex-direction: column; gap: .4rem; }
  .totals      { text-align: left; display: flex; align-items: baseline; gap: .6rem; }
  .total-val   { font-size: 1.25rem; }
  header       { padding: 1.5rem 1rem; }
  .logo        { font-size: 1.5rem; }
  .result-card { padding: .9rem 1rem; }
}