.btn {
  align-items: center;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 0.5rem;
  color: white;
  cursor: pointer;
  display: inline-flex;
  font: 700 0.92rem/1 var(--font-body);
  gap: 0.5rem;
  justify-content: center;
  letter-spacing: -0.01em;
  padding: 0.95rem 1.5rem;
  text-align: center;
  transition: transform var(--transition), background-color var(--transition), border-color var(--transition), box-shadow var(--transition), color var(--transition);
}

.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--color-primary); box-shadow: 0 10px 24px rgba(15, 122, 85, 0.16); }
.btn-primary:hover { background: var(--color-primary-hover); color: white; }
.btn-amazon { background: var(--color-accent); color: white; }
.btn-amazon:hover { background: var(--color-accent-hover); color: white; }

.btn-outline {
  border-color: var(--color-border-strong);
  color: var(--color-ink);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  color: var(--color-primary);
}

.card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: inherit;
  display: block;
  overflow: hidden;
  padding: var(--spacing-6);
  position: relative;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

a.card:hover {
  border-color: rgba(15, 122, 85, 0.38);
  box-shadow: var(--shadow-md);
  transform: translateY(-5px);
}

a.card::after {
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  content: "";
  height: 4px;
  left: 0;
  opacity: 0;
  position: absolute;
  right: 0;
  top: 0;
  transition: opacity var(--transition);
}

a.card:hover::after { opacity: 1; }

.badge {
  align-items: center;
  background: var(--color-surface-2);
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  display: inline-flex;
  font-size: 0.74rem;
  font-weight: 700;
  gap: 0.3rem;
  letter-spacing: 0.03em;
  line-height: 1;
  padding: 0.48rem 0.68rem;
  text-transform: uppercase;
}

.badge-low { background: rgba(23, 114, 69, 0.09); color: var(--color-success); }
.badge-medium { background: rgba(183, 106, 0, 0.1); color: var(--color-warning); }
.badge-high { background: rgba(196, 61, 61, 0.09); color: var(--color-danger); }

.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-4);
}

.input-group label {
  color: var(--color-ink);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.input-group input,
.input-group select,
.input-group textarea,
.hero-form input {
  appearance: none;
  background: white;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  color: var(--color-ink);
  font: 500 0.94rem/1.4 var(--font-body);
  outline: none;
  padding: 0.82rem 0.9rem;
  width: 100%;
}

.input-group select {
  background-image:
    linear-gradient(45deg, transparent 50%, var(--color-text-muted) 50%),
    linear-gradient(135deg, var(--color-text-muted) 50%, transparent 50%);
  background-position: calc(100% - 19px) 50%, calc(100% - 14px) 50%;
  background-repeat: no-repeat;
  background-size: 5px 5px;
  padding-right: 2.4rem;
}

.input-group input:focus,
.input-group select:focus,
.input-group textarea:focus { border-color: var(--color-primary); box-shadow: 0 0 0 4px var(--color-primary-soft); }

.grid { display: grid; gap: var(--spacing-5); }
.grid-2, .grid-3, .grid-4 { grid-template-columns: repeat(1, minmax(0, 1fr)); }

@media (min-width: 680px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.catalogue-layout,
.detail-layout {
  align-items: start;
  display: grid;
  gap: var(--spacing-6);
}

.catalogue-filters,
.detail-sidebar {
  position: sticky;
  top: 108px;
}

.results-count {
  color: var(--color-ink);
  font-size: var(--text-sm);
  font-weight: 700;
}

.catalogue-toolbar {
  margin-bottom: var(--spacing-6);
}

.filter-panel {
  box-shadow: var(--shadow-sm);
  max-height: calc(100vh - 140px);
  overflow: auto;
}

#filter-details summary {
  display: none;
}

.filter-panel h3 {
  margin-bottom: var(--spacing-5);
}

.catalogue-card-top {
  align-items: flex-start;
  display: flex;
  gap: var(--spacing-4);
  justify-content: space-between;
}

.idea-category {
  color: var(--color-accent);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.07em;
  margin-top: calc(-1 * var(--spacing-2));
  text-transform: uppercase;
}


.recommendation-card img {
  aspect-ratio: 1;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: block;
  height: auto;
  object-fit: cover;
  width: 100%;
  max-height: 190px;
}

.recommendation-card img[src$=".svg"] { object-fit: contain; padding: 1rem; }

.book-cover {
  aspect-ratio: 2 / 3;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: block;
  height: auto;
  object-fit: cover;
  width: 100%;
  max-height: 230px;
}

.book-cover-fallback {
  align-items: flex-start;
  background:
    linear-gradient(150deg, rgba(255, 255, 255, 0.14), transparent 44%),
    var(--color-ink);
  color: white;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  padding: var(--spacing-5);
  position: relative;
}

.book-cover-fallback::before {
  background: var(--color-accent);
  content: "";
  height: 0.3rem;
  left: var(--spacing-5);
  position: absolute;
  right: var(--spacing-5);
  top: var(--spacing-5);
}

.book-cover-kicker,
.book-cover-author {
  color: rgba(255, 255, 255, 0.76);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.book-cover-fallback strong {
  font-family: var(--font-heading);
  font-size: clamp(1.35rem, 2vw, 1.85rem);
  letter-spacing: -0.03em;
  line-height: 1.04;
  margin: auto 0 var(--spacing-3);
}

.book-cover-author { letter-spacing: 0; text-transform: none; }

.recommendation-card { height: 100%; }
.recommendation-card p { flex-grow: 1; }

#ideas-container .card { padding: var(--spacing-5); }
#ideas-container h3 {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  font-size: 1.13rem;
  line-height: 1.25;
  min-height: 2.5em;
  overflow: hidden;
}
#ideas-container p {
  -webkit-box-orient: vertical;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  font-size: 0.95rem;
  min-height: calc(0.95rem * 1.6 * 3);
  overflow: hidden;
}
#ideas-container .btn { padding: 0.75rem 1rem; font-size: 0.88rem; }

.page-hero {
  background: linear-gradient(180deg, rgba(15, 122, 85, 0.08), rgba(255, 255, 255, 0) 72%);
  border-bottom: 1px solid var(--color-border);
}

.proof-band {
  background: var(--color-surface);
  border-block: 1px solid var(--color-border);
  color: var(--color-ink);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--spacing-5) 0;
}

.process-card {
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  box-shadow: none;
}

.process-number {
  color: var(--color-accent);
  font: 800 2.2rem/1 var(--font-heading);
}

.card-badges {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: var(--spacing-4);
}

.detail-metrics {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: var(--spacing-6);
}

.metric-card {
  align-items: center;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  gap: 0.75rem;
  min-height: 92px;
  padding: 0.9rem;
}

.metric-card strong,
.metric-value {
  color: var(--color-ink);
  display: block;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.metric-card span {
  color: var(--color-text-muted);
  display: block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
}


.panel-label {
  color: var(--color-text-muted) !important;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 0.35rem;
  text-transform: uppercase;
}

.section-label {
  margin-top: var(--spacing-6);
}

.lever-list,
.check-list {
  padding-left: 1.15rem;
}

.lever-list li,
.check-list li,
.risk-list li {
  margin-bottom: 0.55rem;
}

.risk-panel {
  border-left: 3px solid var(--color-danger);
}

.risk-list {
  list-style: none;
  padding-left: 0;
}

.risk-list li::before {
  color: var(--color-danger);
  content: "!";
  font: 800 0.9rem/1 var(--font-heading);
  margin-right: 0.6rem;
}

.disclosure {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  padding: var(--spacing-3);
}

.item-title {
  font-size: var(--text-lg);
  margin-bottom: 0.3rem;
  margin-top: var(--spacing-4);
}

.item-author {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-bottom: var(--spacing-3);
}

.related-card .badge { margin-bottom: var(--spacing-4); }
.requirement-cost {
  border-top: 1px solid var(--color-border);
  margin-top: var(--spacing-4);
  padding-top: var(--spacing-4);
}
.requirement-cost p { margin-bottom: 0; }

.earning-model {
  color: var(--color-accent);
  font-weight: 650;
  font-size: var(--text-sm);
}

.card-link { color: var(--color-primary); display: inline-block; font-size: var(--text-sm); font-weight: 700; margin-top: var(--spacing-4); }
.idea-card:hover .card-link span { display: inline-block; transform: translateX(4px); transition: transform var(--transition); }

.earning-tier {
  border-bottom: 1px solid var(--color-border);
  padding-block: 0.7rem;
}

.earning-tier span {
  color: var(--color-text-muted);
  display: block;
  font-size: var(--text-sm);
}

.earning-tier strong {
  color: var(--color-ink);
  font-size: var(--text-lg);
  font-weight: 750;
}

.resource-panel {
  border-top: 4px solid var(--color-primary);
  height: 100%;
}

.resource-panel:nth-child(2) { border-top-color: var(--color-accent); }
.resource-panel:nth-child(3) { border-top-color: var(--color-ink); }

.guide-card .guide-number {
  color: var(--color-accent);
  display: block;
  font: 800 1.4rem/1 var(--font-heading);
  margin-bottom: var(--spacing-5);
}

/* Guide pages */
.guide-page,
.guide-main {
  margin: 0 auto;
  max-width: 840px;
  padding: var(--spacing-12) var(--spacing-5) var(--spacing-16);
}

.back-link {
  color: var(--color-text-muted);
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--spacing-5);
}

.back-link:hover { color: var(--color-primary); }
.lead { font-size: clamp(1.05rem, 2vw, 1.3rem); margin-bottom: var(--spacing-8); }
.guide-content h2 { margin-top: var(--spacing-8); }
.inline-link { text-decoration: underline; text-underline-offset: 3px; }
.notice-panel {
  background: var(--color-surface-2);
  border-left: 4px solid var(--color-warning);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-top: var(--spacing-8);
  padding: var(--spacing-4);
}

.notfound-body { display: flex; flex-direction: column; min-height: 100vh; }
.notfound {
  align-items: center;
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: center;
  text-align: center;
}
.notfound h1 {
  color: var(--color-accent);
  font-size: var(--text-4xl);
  margin-bottom: var(--spacing-2);
}
.notfound p { margin-bottom: var(--spacing-6); }

@media (max-width: 1023px) {
  .catalogue-filters,
  .detail-sidebar { position: static; }

  #filter-details summary {
    align-items: center;
    color: var(--color-ink);
    cursor: pointer;
    display: flex;
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: 750;
    justify-content: space-between;
    list-style: none;
  }

  #filter-details summary::-webkit-details-marker { display: none; }

  #filter-details[open] summary::after { content: "–"; }
  #filter-details:not([open]) summary::after { content: "+"; }
}

@media (min-width: 1024px) {
  .catalogue-layout { grid-template-columns: 300px minmax(0, 1fr); }
  .detail-layout { grid-template-columns: minmax(0, 1fr) 340px; gap: var(--spacing-8); }
}

@media (max-width: 679px) {
  .btn { width: 100%; }
  .card { padding: var(--spacing-5); }
}