:root {
  color-scheme: light;
  --bg: #edf3f4;
  --panel: #ffffff;
  --panel-soft: #f5f8f9;
  --line: #d4e0e3;
  --line-strong: #aebfc4;
  --text: #12252a;
  --muted: #687d84;
  --accent: #226571;
  --accent-strong: #164851;
  --accent-soft: #e6f1f2;
  --success: #1d7759;
  --danger: #b43f45;
  --danger-soft: #fff1f1;
  --shadow: 0 18px 50px rgba(18, 37, 42, 0.09);
  --radius: 8px;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --sans: Inter, "Avenir Next", "Helvetica Neue", "PingFang SC", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
body { min-height: 100vh; margin: 0; background: var(--bg); color: var(--text); font-family: var(--sans); }
button, input, select, textarea { font: inherit; }
button, a, input, select, textarea { outline-color: var(--accent); }
a { color: inherit; }
.hidden { display: none !important; }
.shell { width: min(1500px, calc(100vw - 32px)); margin: 0 auto; padding: 34px 0 48px; }
.topbar { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 24px; }
.brand { display: flex; align-items: center; gap: 14px; min-width: 0; }
.mark { display: grid; width: 58px; height: 58px; flex: 0 0 auto; place-items: center; border-radius: var(--radius); background: var(--accent); color: #fff; font-family: var(--mono); font-size: 1.08rem; font-weight: 900; }
.eyebrow { margin: 0 0 6px; color: var(--accent); font-size: 0.76rem; font-weight: 900; letter-spacing: 0.12em; text-transform: uppercase; }
h1, h2, h3 { margin: 0; line-height: 1.15; letter-spacing: 0; }
h1 { font-size: 3rem; }
h2 { font-size: 1.08rem; }
h3 { font-size: 0.98rem; }
.nav { display: flex; gap: 8px; }
.nav a, button, .side-link { display: inline-flex; min-height: 40px; align-items: center; justify-content: center; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); color: var(--text); padding: 8px 14px; cursor: pointer; font-weight: 800; text-decoration: none; }
button:hover, .nav a:hover, .side-link:hover { border-color: var(--line-strong); background: var(--panel-soft); }
button.primary { border-color: var(--accent); background: var(--accent); color: #fff; }
button.primary:hover { background: var(--accent-strong); }
button.danger { border-color: #e5babe; background: var(--danger-soft); color: var(--danger); }
button:disabled { cursor: not-allowed; opacity: 0.45; }
.danger-text { color: var(--danger); }

.card { min-width: 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); box-shadow: var(--shadow); }
.card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; padding: 18px 20px; border-bottom: 1px solid var(--line); }
.card-body { padding: 20px; }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; align-items: start; }
.redeem-grid { grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); }
.create-grid { grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.9fr); }
.lead { margin: 14px 0 0; color: var(--muted); font-size: 1.02rem; line-height: 1.65; }
.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-top: 20px; }
.stat { min-height: 90px; padding: 13px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel-soft); }
.stat strong { display: block; font-family: var(--mono); font-size: 1.3rem; }
.stat span { display: block; margin-top: 6px; color: var(--muted); font-size: 0.86rem; }

.stack { display: grid; gap: 10px; }
label { color: var(--muted); font-weight: 800; }
input, select, textarea { width: 100%; border: 1px solid var(--line); border-radius: var(--radius); background: #fbfcfd; color: var(--text); padding: 10px 12px; }
input, select { min-height: 42px; }
textarea { resize: vertical; line-height: 1.55; }
input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(34, 101, 113, 0.12); }
.form-grid { display: grid; gap: 12px; }
.three-columns { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.inline-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
.status { min-height: 24px; margin-top: 12px; color: var(--muted); line-height: 1.5; }
.status.ok { color: var(--success); }
.status.error { color: var(--danger); }
.pill, .category-badge, .state-badge { display: inline-flex; align-items: center; width: fit-content; border-radius: 999px; background: var(--accent-soft); color: var(--accent-strong); padding: 4px 9px; font-size: 0.76rem; font-weight: 900; white-space: nowrap; }
.pill.error { background: var(--danger-soft); color: var(--danger); }

.admin-layout { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 18px; align-items: start; }
.admin-main, .admin-view { min-width: 0; }
.side-nav { position: sticky; top: 16px; display: grid; gap: 8px; padding: 10px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); box-shadow: var(--shadow); }
.side-link { width: 100%; justify-content: flex-start; }
.side-link.is-active { border-color: var(--accent); background: var(--accent); color: #fff; }
.auth-card { max-width: 520px; }

.category-section { padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.section-title-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 14px; }
.section-title-row > div { display: grid; gap: 4px; }
.muted-text { color: var(--muted); font-size: 0.84rem; }
.category-create { display: grid; grid-template-columns: minmax(160px, 240px) auto; gap: 8px; }
.category-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.category-item { display: inline-flex; align-items: center; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel-soft); overflow: hidden; }
.category-item button { min-height: 34px; border: 0; border-radius: 0; background: transparent; padding: 6px 9px; font-size: 0.78rem; }
.category-filter-button { gap: 8px; }
.category-filter-button strong { display: inline-grid; min-width: 22px; height: 22px; place-items: center; border-radius: 999px; background: var(--panel); color: var(--accent); }
.icon-text-button { border-left: 1px solid var(--line) !important; }

.filters { display: grid; grid-template-columns: minmax(220px, 1fr) 140px 150px 150px 120px; gap: 10px; margin-top: 18px; }
.bulk-toolbar { display: flex; align-items: center; gap: 10px; margin-top: 12px; padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel-soft); }
.bulk-toolbar select { width: auto; min-width: 180px; margin-left: auto; }
.check-label { display: inline-flex; align-items: center; gap: 8px; color: var(--text); white-space: nowrap; }
.check-label input, .row-check input { width: 18px; height: 18px; min-height: 0; margin: 0; accent-color: var(--accent); }
.results { display: grid; gap: 10px; margin-top: 14px; }
.result { display: flex; min-width: 0; align-items: center; justify-content: space-between; gap: 14px; padding: 13px 14px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel-soft); }
.result > div, .result-main { display: grid; min-width: 0; gap: 5px; }
.result code { overflow-wrap: anywhere; color: var(--accent-strong); font-family: var(--mono); font-size: 0.96rem; font-weight: 900; }
.result span { overflow-wrap: anywhere; color: var(--muted); font-size: 0.86rem; line-height: 1.45; }
.result-title { display: flex !important; flex-wrap: wrap; align-items: center; gap: 8px !important; }
.result .result-badges { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.result .category-badge { color: var(--accent-strong); font-size: 0.76rem; line-height: 1.2; }
.result .state-badge { font-size: 0.76rem; line-height: 1.2; }
.result .state-badge.is-active { background: #e4f4ec; color: #176044; }
.result .state-badge.is-disabled { background: #fae8ea; color: #96313a; }
.result .state-badge.is-downloaded { background: #e8efff; color: #315b9e; }
.result .state-badge.is-not-downloaded { background: #fff2cc; color: #75570c; }
.inventory-row { display: grid; grid-template-columns: 24px minmax(0, 1fr) auto; transition: border-color 0.15s, background 0.15s; }
.inventory-row.is-selected { border-color: #7eabb2; background: #edf7f7; }
.row-check { align-self: start; padding-top: 2px; }
.result-actions { display: flex !important; flex-wrap: wrap; justify-content: flex-end; gap: 8px !important; }
.result-actions button { min-height: 36px; padding: 6px 11px; }
.empty-state { display: grid; justify-items: center; gap: 6px; padding: 42px 16px; border: 1px dashed var(--line-strong); border-radius: var(--radius); color: var(--muted); }
.pager { display: flex; align-items: center; justify-content: flex-end; gap: 8px; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--line); }
.pager span { min-width: 110px; color: var(--muted); font-weight: 800; text-align: center; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

@media (max-width: 1100px) {
  .filters { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .filters #inventory-search { grid-column: 1 / -1; }
  .three-columns { grid-template-columns: 1fr 1fr; }
  .create-grid { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .shell { width: min(100% - 20px, 720px); padding-top: 18px; }
  .topbar { align-items: center; margin-bottom: 16px; }
  h1 { font-size: 2rem; }
  .mark { width: 48px; height: 48px; }
  .admin-layout, .grid, .redeem-grid, .filters, .three-columns { grid-template-columns: 1fr; }
  .side-nav { position: static; grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .side-link { justify-content: center; text-align: center; }
  .section-title-row { align-items: stretch; flex-direction: column; }
  .category-create { grid-template-columns: minmax(0, 1fr) auto; }
  .bulk-toolbar { align-items: stretch; flex-wrap: wrap; }
  .bulk-toolbar select { width: 100%; margin-left: 0; order: 3; }
  .bulk-toolbar #apply-category, .bulk-toolbar #delete-selected { flex: 1 1 140px; order: 4; }
  .inventory-row { grid-template-columns: 24px minmax(0, 1fr); }
  .inventory-row .result-actions { grid-column: 1 / -1; justify-content: flex-end; }
}

@media (max-width: 560px) {
  .shell { width: min(100% - 12px, 520px); }
  .topbar { align-items: flex-start; }
  .brand { gap: 9px; }
  h1 { font-size: 1.6rem; }
  .eyebrow { font-size: 0.68rem; }
  .nav a { min-height: 36px; padding: 7px 10px; }
  .card-head, .card-body { padding: 14px; }
  .card-head { align-items: stretch; flex-direction: column; }
  .inline-actions { justify-content: flex-start; }
  .stats { grid-template-columns: 1fr; }
  .side-nav { grid-template-columns: 1fr 1fr; }
  .side-nav a { grid-column: 1 / -1; }
  .category-create { grid-template-columns: 1fr; }
  .category-item { width: 100%; }
  .category-filter-button { flex: 1; justify-content: space-between; }
  .result-title { align-items: flex-start; flex-direction: column; }
  .result-actions { width: 100%; }
  .result-actions button { flex: 1; }
  .pager { display: grid; grid-template-columns: repeat(4, 1fr); }
  .pager span { grid-column: 1 / -1; grid-row: 1; }
  .pager button { min-width: 0; padding: 7px 6px; }
}