:root {
  --ink: #1f2933;
  --muted: #667085;
  --line: #d7dde5;
  --paper: #ffffff;
  --soft: #f5f7fa;
  --blue: #1d4f91;
  --green: #1f7a5c;
  --rose: #a23a52;
  --gold: #a66a13;
  --shadow: 0 16px 40px rgba(31, 41, 51, 0.11);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: #f4f7f3;
  font-family: Pretendard, "Apple SD Gothic Neo", "Noto Sans KR", Arial, sans-serif;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

button,
input,
select,
textarea {
  font: inherit;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
  padding: 18px clamp(18px, 4vw, 56px);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.app-header h1 {
  margin: 4px 0 0;
  font-size: clamp(20px, 2.4vw, 30px);
}

.eyebrow {
  margin: 0;
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
}

.top-nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.top-nav a,
.mode-tab,
button {
  min-height: 42px;
  border-radius: 7px;
}

.top-nav a {
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
  color: var(--ink);
  text-decoration: none;
  border: 1px solid var(--line);
  background: var(--paper);
}

.top-nav a:hover,
.secondary-link:hover {
  color: var(--green);
  border-color: rgba(31, 122, 92, 0.45);
  background: #f0f8f4;
}

main {
  display: grid;
  gap: 22px;
}

.hero-grid,
.workspace-grid,
.admin-shell,
.flow-band,
.content-band,
.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  min-width: 0;
}

.hero-grid > *,
.workspace-grid > *,
.admin-grid > *,
.flow-grid > *,
.metric-grid > * {
  min-width: 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
  gap: 22px;
  align-items: stretch;
  padding-top: 28px;
}

.hero-copy {
  padding: clamp(22px, 3.4vw, 38px);
  min-height: 260px;
  color: #fff;
  background: linear-gradient(120deg, rgba(29, 79, 145, 0.96), rgba(31, 122, 92, 0.9));
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.hero-copy .eyebrow {
  color: #d8f0ff;
}

.hero-copy h2 {
  max-width: 720px;
  margin: 10px 0 16px;
  font-size: clamp(26px, 4.1vw, 42px);
  line-height: 1.14;
  overflow-wrap: anywhere;
}

.hero-copy p:not(.eyebrow) {
  max-width: 680px;
  color: #edf7ff;
  font-size: 15px;
  line-height: 1.6;
}

.hero-actions,
.mode-tabs,
.admin-toolbar,
.admin-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

button {
  cursor: pointer;
  border: 0;
  font-weight: 800;
}

.primary-btn {
  padding: 0 18px;
  color: #fff;
  background: var(--blue);
}

.secondary-btn {
  padding: 0 18px;
  color: var(--blue);
  background: #e9f1fb;
  border: 1px solid #c9d9ee;
}

.full {
  width: 100%;
}

.qr-card,
.catalog-panel,
.order-panel,
.result-panel,
.admin-shell,
.flow-band,
.content-band,
.page-shell {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 28px rgba(31, 41, 51, 0.07);
}

.qr-card {
  display: grid;
  align-content: center;
  gap: 16px;
  padding: 26px;
  text-align: center;
}

.qr-code {
  width: min(88px, 32vw);
  aspect-ratio: 1;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  padding: 14px;
  border: 12px solid #111827;
  background: #fff;
}

textarea {
  padding: 10px 12px;
  resize: vertical;
}

.qr-code span {
  background: #111827;
}

.qr-code span:nth-child(3n),
.qr-code span:nth-child(5n) {
  background: #fff;
  border: 2px solid #111827;
}

.content-band,
.admin-shell,
.flow-band,
.page-shell {
  padding: 24px;
}

.page-shell {
  margin-top: 24px;
}

.narrow-page {
  width: min(860px, calc(100% - 32px));
}

.page-title-row,
.filter-row,
.tile-bottom,
.tile-actions,
.pill-row,
.lookup-page-box {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.page-title-row {
  justify-content: space-between;
  margin-bottom: 18px;
}

.page-title-row h2 {
  margin: 5px 0;
}

.filter-row {
  align-items: stretch;
  margin-bottom: 18px;
}

.filter-row input {
  flex: 1 1 260px;
}

.pill-row {
  flex: 2 1 420px;
}

.pill {
  min-height: 38px;
  padding: 0 14px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
}

.pill.is-active {
  color: #fff;
  background: var(--green);
  border-color: var(--green);
}

.product-tile-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.plan-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.compact-tiles {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.product-tile {
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 100%;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.plan-card,
.detail-card,
.gift-receive-card {
  display: grid;
  gap: 14px;
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.plan-card h3,
.detail-card h2,
.gift-receive-card h2,
.gift-address-form h3 {
  margin: 0;
}

.plan-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.plan-cover {
  width: min(116px, 40vw);
}

.tile-cover-link {
  display: block;
  padding: 14px 14px 0;
}

.product-tile .book-cover {
  width: 100%;
  max-width: none;
}

.tile-body {
  display: grid;
  gap: 8px;
  padding: 14px;
}

.tile-body strong {
  min-height: 42px;
  line-height: 1.4;
}

.tile-body p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.tile-bottom {
  justify-content: space-between;
  align-self: end;
  padding-top: 6px;
}

.tile-bottom span {
  color: var(--rose);
  font-weight: 900;
}

.tile-actions button,
.primary-link,
.secondary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0 12px;
  border-radius: 7px;
  font-size: 13px;
  font-weight: 900;
  text-decoration: none;
}

.tile-actions button,
.primary-link {
  color: #fff;
  background: var(--blue);
}

.secondary-link {
  color: var(--blue);
  background: #e9f1fb;
  border: 1px solid #c9d9ee;
}

.checkout-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 20px;
}

.cart-lines {
  display: grid;
  gap: 10px;
}

.cart-line {
  display: grid;
  grid-template-columns: 58px 1fr auto auto;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.cart-line .book-cover {
  width: 58px;
}

.cart-line p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.checkout-summary {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: 18px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.checkout-summary strong {
  font-size: 26px;
}

.lookup-page-box {
  align-items: end;
  padding: 16px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.lookup-page-box label {
  flex: 1 1 260px;
}

.order-list-result {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.order-detail-stack {
  display: grid;
  gap: 14px;
}

.line-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.line-list li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.gift-receive-shell {
  width: min(760px, calc(100% - 32px));
}

.gift-hero-box,
.gift-address-form {
  display: grid;
  gap: 12px;
  padding: 16px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.gift-hero-box strong {
  font-size: 20px;
}

.section-heading {
  margin-bottom: 16px;
}

.section-heading h2,
.admin-toolbar h3,
.flow-grid h3 {
  margin: 5px 0 0;
}

.compact h2 {
  font-size: 22px;
}

.mode-tab {
  padding: 0 16px;
  color: var(--ink);
  background: var(--soft);
  border: 1px solid var(--line);
}

.mode-tab.is-active {
  color: #fff;
  background: var(--green);
  border-color: var(--green);
}

.purchase-entry {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}

.entry-card {
  display: grid;
  gap: 6px;
  justify-items: start;
  min-height: 96px;
  padding: 16px;
  text-align: left;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
}

.entry-card strong {
  font-size: 19px;
}

.entry-card span {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.entry-card.is-active {
  border-color: var(--green);
  box-shadow: inset 0 0 0 2px rgba(31, 122, 92, 0.16);
}

.book-entry-panel {
  margin-bottom: 16px;
}

.field-purchase-grid,
.search-book-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.field-book-card,
.search-book-card {
  display: grid;
  gap: 12px;
  padding: 14px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.mini-qr {
  width: 72px;
  aspect-ratio: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  padding: 7px;
  background: #fff;
  border: 6px solid #111827;
}

.mini-qr span {
  background: #111827;
}

.mini-qr span:nth-child(even) {
  background: #fff;
  border: 1px solid #111827;
}

.book-entry-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.buy-now-btn,
.detail-buy-btn {
  min-height: 38px;
  padding: 0 12px;
  color: #fff;
  background: var(--blue);
}

.search-tools {
  display: grid;
  gap: 12px;
}

.search-tools input {
  font-size: 16px;
}

.search-section-title {
  margin: 12px 0 8px;
  color: var(--blue);
  font-size: 15px;
}

.optional-mark {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.workspace-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.2fr 0.9fr;
  gap: 18px;
}

.catalog-panel,
.order-panel,
.result-panel {
  padding: 20px;
}

.catalog-list {
  display: grid;
  gap: 12px;
}

.product-card {
  display: grid;
  grid-template-columns: 66px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.book-cover {
  width: 66px;
  aspect-ratio: 3 / 4;
  border-radius: 5px;
  background: linear-gradient(145deg, var(--cover-a), var(--cover-b));
  box-shadow: inset 8px 0 0 rgba(255, 255, 255, 0.3);
  object-fit: cover;
}

.image-cover {
  display: block;
  background: #eef3f8;
  box-shadow: none;
}

.product-card h3 {
  margin: 0 0 4px;
  font-size: 16px;
}

.product-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.qty-control {
  display: flex;
  align-items: center;
  gap: 6px;
}

.qty-control button {
  width: 34px;
  height: 34px;
  color: var(--blue);
  background: #eef4fb;
  border: 1px solid #d3e0ef;
}

.qty-control output {
  min-width: 22px;
  text-align: center;
  font-weight: 800;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

label,
.payment-box {
  display: grid;
  gap: 7px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 800;
}

input,
select {
  width: 100%;
  min-height: 42px;
  padding: 0 12px;
  color: var(--ink);
  border: 1px solid #cfd7e2;
  border-radius: 7px;
  background: #fff;
}

.inline-input {
  min-width: 160px;
  min-height: 34px;
}

.donate-presets {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.auth-shell {
  width: min(520px, calc(100% - 32px));
}

.auth-form {
  display: grid;
  gap: 12px;
  padding: 16px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.version-switch {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 18px;
}

.version-button {
  min-height: 52px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
}

.version-button.is-active {
  color: #fff;
  background: var(--green);
  border-color: var(--green);
}

.version-summary,
.version-map,
.version-group {
  display: grid;
  gap: 14px;
}

.version-hero,
.version-card {
  padding: 16px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.version-hero h3,
.version-group h3,
.version-card strong {
  margin: 0;
}

.version-hero p:not(.eyebrow),
.version-card p {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.version-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.version-card {
  display: grid;
  gap: 10px;
  align-content: start;
}

.version-card code {
  display: block;
  padding: 8px;
  color: var(--blue);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 7px;
  font-size: 12px;
  overflow-wrap: anywhere;
}

.payment-box {
  grid-template-columns: repeat(3, 1fr);
  margin: 16px 0 10px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.payment-box legend {
  padding: 0 8px;
}

.payment-box label,
.check-line {
  display: flex;
  align-items: center;
  gap: 8px;
}

.payment-box input,
.check-line input {
  width: auto;
  min-height: auto;
}

.summary-panel {
  display: grid;
  gap: 10px;
  margin: 16px 0;
  padding: 14px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.summary-panel div,
.metric-card,
.meter-label {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.summary-panel div:last-child {
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-size: 18px;
}

.empty-state,
.result-card,
.lookup-box,
.admin-side,
.flow-grid article {
  padding: 14px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.result-card {
  display: grid;
  gap: 10px;
}

.status-chip {
  display: inline-flex;
  width: fit-content;
  padding: 5px 9px;
  color: #fff;
  background: var(--gold);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 900;
}

.status-chip.done {
  background: var(--green);
}

.lookup-box {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.metric-grid,
.flow-grid,
.support-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.metric-card {
  padding: 16px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.metric-card span {
  color: var(--muted);
  font-size: 13px;
}

.metric-card strong {
  font-size: 22px;
}

.admin-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: 18px;
}

.admin-tabs {
  display: grid;
  grid-auto-rows: 40px;
  gap: 6px;
  align-content: start;
  margin-top: 16px;
}

.admin-tab {
  display: inline-flex;
  gap: 9px;
  align-items: center;
  justify-content: flex-start;
  min-height: 40px;
  height: 40px;
  padding: 0 14px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  line-height: 1;
  text-align: left;
  overflow: hidden;
}

.admin-label {
  min-width: 0;
  white-space: nowrap;
}

.admin-icon {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.admin-tab.is-active {
  color: #fff;
  background: var(--green);
  border-color: var(--green);
}

.admin-layout {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 24px;
}

.admin-nav-panel {
  position: sticky;
  top: 96px;
  align-self: start;
  min-width: 0;
  overflow: hidden;
}

.admin-nav-panel h2 {
  margin: 5px 0 0;
  font-size: 22px;
}

.admin-main-panel {
  min-width: 0;
}

.admin-nav-toggle {
  width: 100%;
  min-height: 38px;
  margin-bottom: 12px;
  padding: 0 12px;
  color: var(--blue);
  background: #e9f1fb;
  border: 1px solid #c9d9ee;
}

.nav-toggle-closed {
  display: none;
}

.admin-shell.is-nav-collapsed .admin-layout {
  grid-template-columns: 64px minmax(0, 1fr);
}

.admin-shell.is-nav-collapsed .admin-nav-title,
.admin-shell.is-nav-collapsed .nav-toggle-open {
  display: none;
}

.admin-shell.is-nav-collapsed .nav-toggle-closed {
  display: inline;
}

.admin-shell.is-nav-collapsed .admin-tab {
  justify-content: center;
  padding: 0;
}

.admin-shell.is-nav-collapsed .admin-label {
  display: none;
}

.admin-home-panel[hidden] {
  display: none;
}

.admin-ops-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(260px, 0.75fr);
  gap: 14px;
  margin-top: 16px;
}

.ops-form-grid {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(280px, 1.2fr);
  gap: 12px;
}

.admin-side textarea {
  width: 100%;
  min-height: 86px;
  padding: 10px 12px;
  color: var(--ink);
  border: 1px solid #cfd7e2;
  border-radius: 7px;
  background: #fff;
}

.save-state {
  min-height: 18px;
  margin: 0;
  color: var(--green);
  font-size: 12px;
  font-weight: 900;
}

.admin-detail {
  display: none;
  margin-top: 14px;
}

.admin-detail.is-visible {
  display: block;
}

.support-card {
  min-height: 190px;
  padding: 16px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.support-card h3 {
  margin: 0 0 10px;
  color: var(--blue);
}

.support-card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.7;
}

.admin-toolbar {
  justify-content: space-between;
  margin-bottom: 12px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
}

table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  background: #fff;
}

th,
td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}

th {
  background: #eef3f8;
  font-size: 13px;
}

td button {
  min-height: 34px;
  padding: 0 10px;
  color: #fff;
  background: var(--green);
}

.danger-btn {
  background: var(--rose);
}

.row-actions {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  justify-content: flex-start;
  white-space: nowrap;
}

.row-actions button {
  min-width: 54px;
}

.product-manager {
  display: grid;
  gap: 14px;
}

.product-form {
  display: grid;
  gap: 12px;
  padding: 14px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.product-list-table .book-cover {
  width: 44px;
}

.asset-preview-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.asset-preview {
  display: grid;
  gap: 8px;
  align-content: start;
  min-height: 132px;
  padding: 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.asset-preview span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.qr-png {
  width: 72px;
  height: 72px;
  image-rendering: pixelated;
  border: 1px solid var(--line);
  background: #fff;
}

.qr-download-box {
  display: inline-grid;
  gap: 6px;
  justify-items: start;
}

.qr-download-btn {
  min-height: 32px;
  padding: 0 10px;
  font-size: 12px;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(17, 24, 39, 0.55);
}

.modal-backdrop[hidden] {
  display: none;
}

.detail-modal {
  width: min(860px, 100%);
  max-height: min(760px, calc(100vh - 40px));
  overflow: auto;
  padding: 22px;
  background: #fff;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.modal-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.modal-head h2 {
  margin: 4px 0 0;
}

.modal-body {
  display: grid;
  gap: 14px;
  padding-top: 14px;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.detail-field {
  padding: 12px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.detail-field span {
  display: block;
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.detail-field strong {
  font-size: 15px;
  line-height: 1.5;
}

.admin-side {
  display: grid;
  align-content: start;
  gap: 12px;
}

.admin-side h3 {
  margin: 0;
}

.helper,
.funding-meter p,
.flow-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.meter-track {
  height: 12px;
  overflow: hidden;
  background: #dfe6ee;
  border-radius: 99px;
}

.meter-track span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--green), var(--gold));
  transition: width 0.25s ease;
}

.flow-grid article h3 {
  color: var(--blue);
}

@media (max-width: 980px) {
  .hero-grid,
  .workspace-grid,
  .admin-grid,
  .admin-layout,
  .checkout-layout,
  .admin-ops-panel,
  .ops-form-grid {
    grid-template-columns: 1fr;
  }

  .metric-grid,
  .flow-grid,
  .support-grid,
  .field-purchase-grid,
  .search-book-grid,
  .product-tile-grid,
  .compact-tiles,
  .plan-grid,
  .version-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .admin-nav-panel {
    position: static;
  }

  .admin-tabs {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .app-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-grid,
  .workspace-grid,
  .admin-shell,
  .flow-band,
  .content-band,
  .page-shell,
  .narrow-page {
    width: min(100% - 20px, 1180px);
  }

  .hero-copy {
    min-height: auto;
    padding: 26px;
  }

  .hero-copy h2 {
    font-size: 34px;
  }

  .form-grid,
  .payment-box,
  .metric-grid,
  .flow-grid,
  .support-grid,
  .purchase-entry,
  .field-purchase-grid,
  .search-book-grid,
  .asset-preview-grid,
  .product-tile-grid,
  .compact-tiles,
  .plan-grid,
  .version-switch,
  .version-card-grid,
  .admin-tabs {
    grid-template-columns: 1fr;
  }

  .product-card,
  .cart-line {
    grid-template-columns: 54px 1fr;
  }

  .qty-control {
    grid-column: 1 / -1;
    justify-content: flex-end;
  }

  .cart-line .danger-btn {
    grid-column: 1 / -1;
  }
}