:root {
  --color-bg: #f7f9fc;
  --color-surface: #ffffff;
  --color-text: #111111;
  --color-muted: #5d6470;
  --color-primary: #0b3c82;
  --color-primary-dark: #072953;
  --color-border: #d4dae3;
  --color-error: #9b1c1c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Times New Roman", Times, serif;
  color: var(--color-text);
  background: linear-gradient(180deg, #eef3fb 0%, var(--color-bg) 100%);
}

.prototype-badge {
  position: fixed;
  top: 0.7rem;
  right: 0.7rem;
  z-index: 20;
  border: 1px solid #0a2850;
  background: #0b3c82;
  color: #ffffff;
  padding: 0.3rem 0.6rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2rem 2rem 3rem;
}

.top-nav {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 1rem;
}

.nav-link {
  border: 1px solid var(--color-border);
  background: #ffffff;
  color: var(--color-primary-dark);
  text-decoration: none;
  padding: 0.45rem 0.75rem;
  border-radius: 4px;
  font-weight: 600;
}

.nav-link:hover,
.nav-link:focus-visible {
  border-color: #1f4f93;
  background: #f3f7ff;
}

.site-header {
  margin-bottom: 1rem;
  text-align: center;
}

.site-header h1 {
  margin-bottom: 0.5rem;
  color: var(--color-primary-dark);
}

.site-header p {
  margin: 0;
  color: var(--color-muted);
}

.prototype-note {
  margin-top: 0.6rem;
  font-size: 0.95rem;
  color: #0b3c82;
}

.card {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: 2rem;
  border-radius: 3px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.07);
}

.step {
  display: none;
}

.step.is-active {
  display: block;
}

h2 {
  margin-top: 0;
  margin-bottom: 1rem;
  color: var(--color-primary-dark);
}

label,
legend {
  font-weight: 600;
}

select {
  width: 100%;
  margin-top: 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: 2px;
  padding: 0.55rem;
  font: inherit;
  background: #ffffff;
}

fieldset {
  border: 0;
  padding: 0.9rem;
  margin: 0;
}

.class-choices {
  padding: 0;
}

.class-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.6rem;
  margin-top: 0.5rem;
  max-width: 100%;
}

.package-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.2rem;
  align-items: start;
}

.class-option {
  display: block;
  position: relative;
  cursor: pointer;
}

.class-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.option-content {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: #ffffff;
  padding: 0.8rem 0.9rem;
  font-weight: 600;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.indicator {
  width: 0.9rem;
  height: 0.9rem;
  border: 1px solid #8791a0;
  border-radius: 50%;
  background: #ffffff;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.class-option input:focus-visible + .option-content {
  border-color: #1f4f93;
  box-shadow: 0 0 0 2px rgba(11, 60, 130, 0.2);
}

.class-option input:checked + .option-content {
  border-color: #1f4f93;
  background: #f3f7ff;
}

.class-option input:checked + .option-content .indicator {
  border-color: #0b3c82;
  background: #0b3c82;
}

.preview-panel {
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: #fbfcfe;
  padding: 0.5rem 1rem 1rem;
  margin-top: 0.5rem;
}

.preview-title {
  margin: 0 0 0.8rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}

.preview-actions {
  margin-bottom: 0.9rem;
}

.book-picker {
  display: grid;
  gap: 0.6rem;
}

.add-tile-button {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.5rem;
  min-height: 0;
  width: auto;
  max-width: fit-content;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: #ffffff;
  color: var(--color-primary-dark);
  padding: 0.45rem 0.75rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.add-tile-button:hover,
.add-tile-button:focus-visible {
  border-color: #1f4f93;
  background: #f8fbff;
  box-shadow: 0 0 0 2px rgba(11, 60, 130, 0.1);
}

.add-tile-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.2rem;
  height: 1.2rem;
  border-radius: 50%;
  border: 1px solid #1f4f93;
  color: #0b3c82;
  font-size: 1rem;
  line-height: 1;
}

.picker-label {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-muted);
}

.book-picker-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.7rem;
}

.book-choice {
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: #fbfcfe;
  padding: 0.5rem;
  cursor: pointer;
  font: inherit;
  text-align: left;
  transition: border-color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.book-choice:hover,
.book-choice:focus-visible {
  border-color: #1f4f93;
  background: #f3f7ff;
  box-shadow: 0 0 0 2px rgba(11, 60, 130, 0.1);
}

.book-choice-image {
  display: block;
  border-radius: 4px;
  overflow: hidden;
  background: #f4f7fb;
}

.book-choice-image img {
  display: block;
  width: 100%;
  height: 132px;
  object-fit: contain;
}

.book-choice-badge,
.preview-badge {
  display: inline-flex;
  align-items: center;
  margin-top: 0.55rem;
  padding: 0.18rem 0.45rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.book-choice-badge {
  border: 1px dashed #6f86ab;
  color: #315285;
  background: #f8fbff;
}

.book-choice-label {
  display: block;
  margin-top: 0.45rem;
  font-weight: 600;
  color: var(--color-text);
}

.book-choice-price {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.88rem;
  color: var(--color-muted);
}

.mini-btn {
  border: 1px solid #8b93a0;
  border-radius: 4px;
  background: #ffffff;
  color: var(--color-text);
  padding: 0.45rem 0.75rem;
  font: inherit;
  cursor: pointer;
}

.mini-btn:hover,
.mini-btn:focus-visible {
  border-color: #1f4f93;
  color: var(--color-primary-dark);
}

.mini-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.8rem;
}

.preview-item {
  margin: 0;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  overflow: hidden;
  background: #ffffff;
}

.preview-item-body {
  padding: 0.7rem;
}

.preview-item img {
  display: block;
  width: 100%;
  max-height: 180px;
  object-fit: contain;
  background: #f4f7fb;
}

.preview-placeholder {
  display: grid;
  place-items: center;
  width: 100%;
  height: 180px;
  padding: 0.9rem;
  background: #f4f7fb;
  color: var(--color-primary-dark);
  font-weight: 700;
  text-align: center;
}

.preview-badge {
  margin-top: 0;
  border: 1px solid #b8c7df;
  color: var(--color-primary-dark);
  background: #eef4fd;
}

.preview-item figcaption {
  padding: 0.55rem 0 0;
  font-size: 0.95rem;
  color: var(--color-muted);
}

.preview-pricing {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.preview-price,
.preview-total {
  font-size: 0.92rem;
  color: var(--color-primary-dark);
}

.preview-total {
  color: var(--color-muted);
}

.preview-item-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
  padding: 0.7rem;
  border-top: 1px solid var(--color-border);
}

.preview-remove {
  border-color: #c98d8d;
  background: #fff8f8;
  color: #7a1d1d;
}

.quantity-controls {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.qty-btn {
  width: 1.9rem;
  height: 1.9rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: #ffffff;
  color: var(--color-primary-dark);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.qty-btn:hover,
.qty-btn:focus-visible {
  border-color: #1f4f93;
  background: #f3f7ff;
}

.quantity-value,
.quantity-static {
  font-size: 0.9rem;
  color: var(--color-text);
}

.quantity-static {
  color: var(--color-muted);
}

.radio-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.6rem;
  font-weight: 400;
}

.actions {
  margin-top: 1.2rem;
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
}

.btn {
  border: 1px solid #222;
  padding: 0.55rem 1rem;
  font: inherit;
  cursor: pointer;
}

.btn.primary {
  color: #ffffff;
  border-color: var(--color-primary);
  background: var(--color-primary);
}

.btn.primary:hover,
.btn.primary:focus-visible {
  background: var(--color-primary-dark);
}

.btn.secondary {
  color: #111111;
  border-color: #8b93a0;
  background: #f5f7fa;
}

.error {
  min-height: 1.2rem;
  margin-top: 0.8rem;
  color: var(--color-error);
}

.hint {
  margin: 0.5rem 0 0;
  color: var(--color-muted);
  font-size: 0.95rem;
}

.success {
  margin-top: 1rem;
  border-color: #b8c7df;
}

.success h2 {
  margin-bottom: 0.5rem;
}

.success ul {
  margin: 0.8rem 0 0;
  padding-left: 1.1rem;
}

.analytics-page {
  display: grid;
  gap: 1rem;
}

.analytics-hero h1 {
  margin: 0 0 0.35rem;
  color: var(--color-primary-dark);
}

.analytics-auth-copy {
  margin: 0 0 1rem;
  color: var(--color-muted);
}

.analytics-auth-form {
  display: grid;
  gap: 0.7rem;
}

.analytics-auth-label {
  font-weight: 700;
}

.analytics-auth-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.7rem;
  align-items: center;
}

.analytics-auth-input {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.65rem 0.75rem;
  font: inherit;
  background: #ffffff;
}

.analytics-auth-input:focus-visible {
  outline: none;
  border-color: #1f4f93;
  box-shadow: 0 0 0 2px rgba(11, 60, 130, 0.2);
}

.analytics-hero p {
  margin: 0;
  color: var(--color-muted);
}

.analytics-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}

.metric-card {
  padding: 1.2rem;
}

.metric-label {
  margin: 0;
  color: var(--color-muted);
}

.metric-value {
  margin: 0.4rem 0 0;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}

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

.analytics-panel {
  padding: 1.2rem;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.8rem;
}

.panel-head h2 {
  margin: 0;
}

.analytics-list,
.orders-list {
  display: grid;
  gap: 0.75rem;
}

.analytics-row,
.order-card {
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: #fbfcfe;
  padding: 0.8rem 0.9rem;
}

.analytics-row {
  display: grid;
  gap: 0.15rem;
}

.analytics-row span,
.order-card-copy,
.order-card-head span {
  color: var(--color-muted);
}

.order-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.order-card-copy,
.order-card-total {
  margin: 0.35rem 0 0;
}

.table-wrap {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th,
.data-table td {
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  padding: 0.65rem 0.5rem;
  vertical-align: top;
}

.table-input {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.45rem 0.55rem;
  font: inherit;
}

@media (max-width: 520px) {
  .container {
    padding: 1rem 0.7rem 2rem;
  }

  .card {
    padding: 1rem;
  }

  .package-layout {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 760px) {
  .analytics-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .analytics-auth-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .panel-head,
  .order-card-head {
    align-items: flex-start;
    flex-direction: column;
  }
}