/**
 * Parlance Education Platform - IELTS Writing Idea Book
 * Native styling adhering to Parlance Brand Guidelines
 */

.idea-book-main {
  min-width: 0;
  padding-top: 76px;
  --idea-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --idea-motion-fast: 0.24s var(--idea-ease);
  --idea-motion-base: 0.36s var(--idea-ease);
}

.idea-book-main > .container {
  max-width: 1380px;
  padding-inline: clamp(18px, 3vw, 36px);
}

/* ==========================================================================
   1. HERO & TOP BAR
   ========================================================================== */
.idea-hero-section {
  padding: clamp(40px, 5vw, 72px) 0 40px;
  border-bottom: 2px solid var(--surface-border);
  margin-bottom: 30px;
}

.idea-hero-wrapper {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 410px);
  gap: clamp(40px, 6vw, 88px);
  align-items: center;
}

.idea-hero-main {
  min-width: 0;
  max-width: 760px;
}

.idea-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--brand-red);
  margin-bottom: 12px;
}

.idea-hero-title {
  font-family: var(--font-heading);
  font-size: clamp(40px, 4.4vw, 64px);
  font-weight: 800;
  color: var(--text);
  line-height: 1.08;
  letter-spacing: -0.025em;
  margin: 0 0 16px;
}

.idea-hero-title span {
  color: var(--brand-red);
}

.idea-hero-desc {
  font-size: clamp(16px, 1.35vw, 18px);
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0;
  max-width: 680px;
}

.idea-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  min-width: 0;
}

.idea-stat-box {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 7px;
  min-height: 118px;
  padding: 20px;
  background: var(--white);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(15, 15, 20, 0.035);
  transition: transform var(--idea-motion-base), border-color var(--idea-motion-base), box-shadow var(--idea-motion-base);
}

.idea-stat-box:hover {
  transform: translateY(-3px);
  border-color: rgba(227, 24, 55, 0.22);
  box-shadow: 0 14px 32px rgba(15, 15, 20, 0.075);
}

.idea-stat-val {
  font-family: var(--font-heading);
  font-size: clamp(28px, 2.4vw, 36px);
  font-weight: 800;
  color: var(--text);
  line-height: 1;
}

.idea-stat-label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ==========================================================================
   2. FILTER & SEARCH BAR
   ========================================================================== */
.idea-filter-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-bottom: 16px;
}

.idea-filter-note {
  margin: 0 0 30px;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.6;
  max-width: 920px;
}

.idea-search-wrap {
  position: relative;
  min-width: 0;
}

.idea-search-input {
  width: 100%;
  height: 56px;
  padding: 0 18px 0 50px;
  background: var(--white);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  font-size: 16px;
  color: var(--text);
  outline: none;
  transition: border-color var(--idea-motion-fast), box-shadow var(--idea-motion-fast), background-color var(--idea-motion-fast);
  box-sizing: border-box;
}

.idea-search-input:focus {
  border-color: var(--brand-red);
  box-shadow: 0 0 0 3px rgba(227, 24, 55, 0.12);
}

.idea-search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-size: 16px;
  pointer-events: none;
  transition: color var(--idea-motion-fast), transform var(--idea-motion-fast);
}

.idea-search-wrap:focus-within .idea-search-icon {
  color: var(--brand-red);
  transform: translateY(-50%) scale(1.06);
}

.idea-types-scroll {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  min-width: 0;
  overflow: visible;
  -webkit-overflow-scrolling: touch;
}

.idea-filter-label {
  flex: 0 0 auto;
  margin-right: 2px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.idea-type-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 42px;
  padding: 0 15px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--surface-border);
  color: var(--text);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: transform var(--idea-motion-fast), background-color var(--idea-motion-fast), border-color var(--idea-motion-fast), color var(--idea-motion-fast), box-shadow var(--idea-motion-fast);
  user-select: none;
}

.idea-type-pill:hover {
  background: var(--surface-alt);
  border-color: var(--surface-border-strong);
  transform: translateY(-2px);
  box-shadow: 0 7px 16px rgba(15, 15, 20, 0.06);
}

.idea-type-pill.active {
  background: var(--text);
  color: var(--white);
  border-color: var(--text);
}

.idea-type-tag {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
}

.tag-op { background: var(--brand-red-light); color: var(--brand-red); }
.tag-dv { background: #EEF4FF; color: #175CD3; }
.tag-ad { background: #ECFDF3; color: #027A48; }
.tag-ps { background: #FEF6EE; color: #B93815; }
.tag-tq { background: #F8F9FC; color: #344054; border: 1px solid #D0D5DD; }

.idea-type-pill.active .tag-op,
.idea-type-pill.active .tag-dv,
.idea-type-pill.active .tag-ad,
.idea-type-pill.active .tag-ps,
.idea-type-pill.active .tag-tq {
  background: rgba(255, 255, 255, 0.2);
  color: #FFFFFF;
}

/* ==========================================================================
   3. 30 TOPIC CARDS GRID
   ========================================================================== */
.idea-topics-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  margin-bottom: clamp(56px, 7vw, 88px);
}

.idea-topic-card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 24px 22px 22px;
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100%;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 8px 24px rgba(15, 15, 20, 0.03);
  transition: transform var(--idea-motion-base), border-color var(--idea-motion-base), box-shadow var(--idea-motion-base), background-color var(--idea-motion-base);
  box-sizing: border-box;
}

.idea-topic-card:hover {
  transform: translateY(-4px);
  border-color: var(--brand-red);
  box-shadow: 0 18px 38px rgba(15, 15, 20, 0.09);
}

.idea-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
}

.idea-card-ch {
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--brand-red);
  background: var(--brand-red-light);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
}

.idea-card-counts {
  flex: 0 0 auto;
  padding-top: 3px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--muted);
}

.idea-card-title {
  font-family: var(--font-heading);
  font-size: clamp(20px, 1.6vw, 23px);
  font-weight: 800;
  color: var(--text);
  line-height: 1.2;
  margin: 0 0 14px;
  overflow-wrap: anywhere;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.idea-card-previews {
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.idea-card-previews li {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.45;
  white-space: normal;
  overflow: hidden;
  overflow-wrap: anywhere;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.idea-card-previews li::before {
  content: "•";
  color: var(--muted);
  position: absolute;
  left: 1px;
  top: 0.08em;
  font-size: 15px;
  line-height: 1;
}

.idea-card-previews .idea-card-more {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.idea-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--surface-border);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--muted);
}

.idea-card-link {
  color: var(--brand-red);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  white-space: nowrap;
  transition: transform var(--idea-motion-base), color var(--idea-motion-fast);
}

.idea-topic-card:hover .idea-card-link {
  transform: translateX(4px);
}

.idea-topic-card:focus-visible,
.idea-item-row:focus-visible,
.section-ps-row:focus-visible,
.idea-type-pill:focus-visible,
.topic-mobile-jump:focus-visible {
  outline: 3px solid rgba(236, 48, 19, 0.28);
  outline-offset: 3px;
}

.idea-book-main :where(a, button, input, select):focus-visible {
  outline: 3px solid rgba(236, 48, 19, 0.3);
  outline-offset: 3px;
}

.idea-card-match {
  display: none;
  margin: 12px 0 0;
  color: var(--brand-red);
  font-size: 12px;
  font-weight: 700;
}

.idea-card-match.visible {
  display: block;
}

/* Empty Search */
.idea-empty-state {
  text-align: center;
  padding: 60px 20px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  margin-bottom: 40px;
}

.idea-empty-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

/* ==========================================================================
   4. TOPIC DETAIL VIEW
   ========================================================================== */
.topic-detail-header {
  padding: clamp(28px, 4vw, 48px) 0 30px;
  border-bottom: 2px solid var(--surface-border);
  margin-bottom: 32px;
}

.topic-detail-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.topic-back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  min-height: 44px;
  padding: 8px 14px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-sm);
  transition: transform var(--idea-motion-fast), background-color var(--idea-motion-fast), border-color var(--idea-motion-fast), color var(--idea-motion-fast), box-shadow var(--idea-motion-fast);
}

.topic-back-link:hover {
  background: var(--surface-alt);
  color: var(--brand-red);
  transform: translateX(-2px);
  box-shadow: 0 7px 16px rgba(15, 15, 20, 0.05);
}

.topic-nav-prevnext {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.topic-prevnext-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
  min-height: 44px;
  max-width: min(300px, 38vw);
  padding: 8px 14px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-sm);
  transition: transform var(--idea-motion-fast), background-color var(--idea-motion-fast), border-color var(--idea-motion-fast), color var(--idea-motion-fast), box-shadow var(--idea-motion-fast);
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.topic-prevnext-btn:hover {
  border-color: var(--brand-red);
  color: var(--brand-red);
  background: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 7px 16px rgba(15, 15, 20, 0.05);
}

.topic-title-area {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 20px;
}

.topic-main-heading {
  font-family: var(--font-heading);
  font-size: clamp(38px, 5vw, 58px);
  font-weight: 800;
  color: var(--text);
  margin: 0;
  line-height: 1.1;
  overflow-wrap: anywhere;
}

.topic-chapter-kicker {
  margin-bottom: 8px;
  color: var(--brand-red);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.topic-detail-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--muted);
}

.topic-detail-stats span strong {
  color: var(--text);
  font-size: 16px;
}

/* 2-Column Content Layout */
.topic-detail-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: clamp(28px, 3vw, 44px);
  align-items: start;
  margin-bottom: 80px;
}

.topic-mobile-tools {
  display: none;
}

/* Sticky Sidebar Navigation */
.topic-sticky-sidebar {
  position: sticky;
  top: 92px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-height: calc(100vh - 112px);
  overflow-y: auto;
  scrollbar-width: thin;
}

.topic-sidebar-box {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  padding: 16px;
}

.topic-sidebar-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 12px;
}

.topic-tag-note {
  margin: 10px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--surface-border);
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.45;
}

.topic-sidebar-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.topic-sidebar-link {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 6px;
  min-height: 40px;
  padding: 8px;
  font-size: 13.5px;
  color: var(--text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  line-height: 1.35;
  transition: transform var(--idea-motion-fast), background-color var(--idea-motion-fast), color var(--idea-motion-fast), box-shadow var(--idea-motion-fast);
}

.topic-sidebar-link:hover {
  background: var(--white);
  color: var(--brand-red);
  transform: translateX(3px);
  box-shadow: 0 5px 14px rgba(15, 15, 20, 0.045);
}

.topic-sidebar-link span.num {
  font-weight: 700;
  color: var(--brand-red);
  font-size: 12px;
}

.topic-sidebar-link.wb-link {
  font-weight: 700;
  margin-top: 6px;
  border-top: 1px solid var(--surface-border);
  padding-top: 10px;
}

.topic-sidebar-types {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.topic-sidebar-types .idea-type-pill {
  min-height: 38px;
  padding: 0 10px;
}

.topic-sidebar-hint {
  margin: 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.5;
}

/* Main Sections Column */
.topic-content-column {
  display: flex;
  flex-direction: column;
  gap: 32px;
  min-width: 0;
}

.idea-section-card {
  background: var(--white);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
  scroll-margin-top: 108px;
  transition: border-color var(--idea-motion-base), box-shadow var(--idea-motion-base);
}

.idea-section-card:hover {
  border-color: rgba(227, 24, 55, 0.18);
  box-shadow: 0 12px 30px rgba(15, 15, 20, 0.065);
}

.section-card-header {
  padding: clamp(20px, 2.2vw, 30px);
  background: var(--white);
  border-bottom: 1px solid var(--surface-border);
}

.section-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 8px;
}

.section-num-label {
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--brand-red);
}

.section-card-title {
  font-family: var(--font-heading);
  font-size: clamp(22px, 2.2vw, 28px);
  font-weight: 800;
  color: var(--text);
  line-height: 1.25;
  margin: 0 0 16px;
  overflow-wrap: anywhere;
}

.section-question-box {
  background: var(--surface);
  border-left: 3px solid var(--brand-red);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 14px 18px;
}

.section-q-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 4px;
}

.section-q-text {
  font-size: clamp(16px, 1.4vw, 17px);
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
  margin: 0;
  overflow-wrap: anywhere;
}

/* Columns / Arguments (FOR / AGAINST) */
.section-cols-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-bottom: 1px solid var(--surface-border);
}

.section-col-block {
  padding: 20px 24px 24px;
  border-right: 1px solid var(--surface-border);
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.section-col-block:last-child {
  border-right: none;
}

.section-col-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 10px;
  margin-bottom: 8px;
  border-bottom: 2px solid var(--text);
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text);
}

/* Individual Idea Item */
.idea-item-row {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: start;
  padding: 10px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: opacity var(--idea-motion-fast), background-color var(--idea-motion-fast), transform var(--idea-motion-fast);
  user-select: none;
  min-width: 0;
}

.idea-item-row:hover {
  background: var(--surface);
  transform: translateX(2px);
}

.idea-item-row.dimmed {
  opacity: 0.28;
}

.idea-item-row.pinned {
  background: var(--brand-red-light);
}

.idea-num {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 15px;
  color: var(--brand-red);
  line-height: 1.4;
}

.idea-text {
  min-width: 0;
  font-size: 15.5px;
  line-height: 1.55;
  color: var(--text);
  overflow-wrap: anywhere;
}

.idea-pin-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  background: var(--brand-red);
  color: #FFFFFF;
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 8px;
  vertical-align: middle;
}

/* Problem -> Solution Layout */
.section-ps-container {
  padding: 20px 24px 24px;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.section-ps-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 28px minmax(0, 1fr) auto;
  gap: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--text);
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text);
}

.section-ps-head.ps-cols-2,
.section-ps-row.ps-cols-2 {
  grid-template-columns: minmax(0, 1fr) 28px minmax(0, 1fr) auto;
}

.section-ps-head.ps-cols-3,
.section-ps-row.ps-cols-3 {
  grid-template-columns: minmax(0, 1fr) 24px minmax(0, 1fr) 24px minmax(0, 1fr) auto;
  gap: 10px;
}

.section-ps-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 28px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
  padding: 14px 8px;
  border-bottom: 1px solid var(--surface-border);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: opacity var(--idea-motion-fast), background-color var(--idea-motion-fast), transform var(--idea-motion-fast);
  min-width: 0;
}

.section-ps-row > .idea-type-tag {
  justify-self: start;
  align-self: start;
  width: max-content;
}

.section-ps-row:hover {
  background: var(--surface);
  transform: translateX(2px);
}

.section-ps-row.dimmed {
  opacity: 0.28;
}

.section-ps-row.pinned {
  background: var(--brand-red-light);
}

.ps-arrow {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 800;
  color: var(--brand-red);
  text-align: center;
  line-height: 1.3;
}

.ps-mobile-label {
  display: none;
}

/* ==========================================================================
   5. WORD BANK (NATIVE PARLANCE DARK/EDITORIAL STYLE)
   ========================================================================== */
.idea-wordbank-section {
  background: #18181C;
  color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 36px 32px 40px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.15);
  scroll-margin-top: 108px;
  min-width: 0;
}

.wb-header-area {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  align-items: flex-end;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.wb-eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: #FF8F94;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.wb-title {
  font-family: var(--font-heading);
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 800;
  color: #FFFFFF;
  margin: 0 0 6px;
  line-height: 1.1;
}

.wb-title span {
  color: #FF8F94;
}

.wb-subtitle {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.6);
  margin: 0;
}

.wb-filter-input {
  min-height: 46px;
  width: min(300px, 100%);
  max-width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: #232328;
  color: #FFFFFF;
  padding: 0 14px;
  font-size: 15px;
  outline: none;
  transition: border-color var(--idea-motion-fast), box-shadow var(--idea-motion-fast), background-color var(--idea-motion-fast);
}

.wb-filter-input:focus {
  border-color: #FF8F94;
  background: #292930;
  box-shadow: 0 0 0 3px rgba(255, 143, 148, 0.12);
}

.wb-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.wb-empty-state {
  margin: 0;
  padding: 28px;
  border: 1px dashed rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-md);
  color: rgba(255, 255, 255, 0.7);
  text-align: center;
}

.wb-term-card {
  background: #232328;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 18px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform var(--idea-motion-base), background-color var(--idea-motion-base), border-color var(--idea-motion-base), box-shadow var(--idea-motion-base);
}

.wb-term-card:hover {
  transform: translateY(-3px);
  background: #292930;
  border-color: rgba(255, 143, 148, 0.3);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.2);
}

.wb-term-card.is-universal {
  border-color: rgba(255, 143, 148, 0.45);
}

.wb-universal-badge {
  flex: 0 0 auto;
  padding: 3px 6px;
  border-radius: 999px;
  background: rgba(255, 143, 148, 0.14);
  color: #ffb1b5;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.wb-term-head {
  display: flex;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 8px;
  min-width: 0;
}

.wb-term-num {
  font-size: 11px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.4);
}

.wb-term-name {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 800;
  color: #FFFFFF;
  flex: 1 1 150px;
  min-width: 0;
  overflow-wrap: anywhere;
}

.wb-term-pos {
  font-size: 11px;
  font-weight: 700;
  color: #FF8F94;
  font-style: italic;
}

.wb-term-meaning {
  font-size: 14px;
  line-height: 1.45;
  color: rgba(255, 255, 255, 0.82);
  overflow-wrap: anywhere;
}

.wb-term-example {
  font-size: 13.5px;
  font-weight: 600;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.65);
  border-left: 2px solid var(--brand-red);
  padding-left: 10px;
  margin-top: 4px;
  overflow-wrap: anywhere;
}

/* Bottom Chapter Navigation */
.topic-bottom-prevnext {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 40px;
}

.topic-pn-card {
  background: var(--white);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: transform var(--idea-motion-base), border-color var(--idea-motion-base), box-shadow var(--idea-motion-base), background-color var(--idea-motion-base);
  min-width: 0;
}

.topic-pn-card:hover {
  border-color: var(--brand-red);
  transform: translateY(-3px);
  box-shadow: 0 12px 26px rgba(15, 15, 20, 0.07);
}

.topic-pn-card.next {
  text-align: right;
}

.topic-pn-eyebrow {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.topic-pn-name {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 800;
  color: var(--text);
  overflow-wrap: anywhere;
}

/* ==========================================================================
   6. FLOATING PARAGRAPH PLANNER TRAY
   ========================================================================== */
.idea-planner-tray {
  position: fixed;
  left: 50%;
  bottom: max(18px, env(safe-area-inset-bottom, 0px));
  transform: translateX(-50%);
  z-index: 900;
  width: min(1120px, calc(100% - 40px));
  background: #18181C;
  color: #FFFFFF;
  border-radius: var(--radius-lg);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.28);
  padding: 16px 18px;
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
  box-sizing: border-box;
}

.idea-book-main.has-planner {
  padding-bottom: var(--planner-clearance, 190px);
}

.planner-tray-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 0 1 210px;
  min-width: 150px;
}

.planner-tray-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #FF8F94;
}

.planner-tray-hint {
  font-size: 12.5px;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.6);
}

.planner-slots-grid {
  flex: 1 1 360px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.planner-slot-box {
  background: #232328;
  border: 1px dashed rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  display: flex;
  align-items: start;
  gap: 6px;
  min-height: 58px;
}

.planner-slot-box.filled {
  border-style: solid;
  border-color: rgba(255, 255, 255, 0.35);
}

.slot-inner {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.slot-tag {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #FF8F94;
}

.slot-text {
  font-size: 12.5px;
  line-height: 1.35;
  color: #FFFFFF;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.slot-remove-btn {
  background: transparent;
  border: none;
  color: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  flex: 0 0 38px;
  width: 38px;
  min-height: 38px;
  font-size: 20px;
  line-height: 1;
  padding: 0;
  border-radius: 50%;
}

.slot-remove-btn:hover {
  color: #FF8F94;
}

.planner-tray-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.planner-copy-btn {
  min-height: 44px;
  padding: 0 16px;
  border-radius: var(--radius-sm);
  border: none;
  background: var(--brand-red);
  color: #FFFFFF;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s;
}

.planner-copy-btn:hover {
  background: var(--brand-red-hover);
}

.planner-clear-btn {
  min-height: 44px;
  padding: 0 12px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: transparent;
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}

.planner-clear-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
}

/* ==========================================================================
   7. HOMEPAGE PROMOTIONAL CARD
   ========================================================================== */
.idea-promo-section {
  padding: 60px 0;
}

.idea-promo-card {
  position: relative;
  background: #18181C;
  color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 48px;
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 48px;
  align-items: center;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.12);
  text-decoration: none;
  overflow: hidden;
}

.idea-promo-card:focus-visible {
  outline: 3px solid rgba(236, 48, 19, 0.35);
  outline-offset: 4px;
}

.idea-promo-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: #FF8F94;
  margin-bottom: 12px;
}

.idea-promo-title {
  font-family: var(--font-heading);
  font-size: clamp(32px, 4.5vw, 46px);
  font-weight: 800;
  color: #FFFFFF;
  line-height: 1.12;
  margin: 0 0 16px;
}

.idea-promo-title span {
  color: #FF8F94;
}

.idea-promo-desc {
  font-size: 16px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.75);
  margin: 0 0 24px;
  max-width: 520px;
}

.idea-promo-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.idea-promo-chip {
  font-size: 12px;
  font-weight: 700;
  background: #28282E;
  color: rgba(255, 255, 255, 0.9);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.idea-promo-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 48px;
  padding: 0 24px;
  background: var(--brand-red);
  color: #FFFFFF;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.2s ease, transform 0.2s ease;
}

.idea-promo-btn:hover {
  background: var(--brand-red-hover);
  transform: translateY(-2px);
}

.idea-promo-card:hover .idea-promo-btn {
  background: var(--brand-red-hover);
  transform: translateY(-2px);
}

/* Editorial Preview Visual on Right */
.idea-promo-visual {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.promo-mini-card {
  background: #232328;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.promo-mini-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  font-weight: 700;
  color: #FF8F94;
}

.promo-mini-title {
  font-size: 14px;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.3;
}

/* ==========================================================================
   8. RESPONSIVE BREAKPOINTS
   ========================================================================== */
@media (max-width: 1320px) {
  .topic-detail-layout {
    grid-template-columns: 1fr;
  }

  .topic-sticky-sidebar {
    display: none;
  }

  .topic-mobile-tools {
    display: grid;
    gap: 12px;
    margin: -10px 0 24px;
    padding: 16px;
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-md);
    background: var(--white);
  }
  .topic-mobile-tools label {
    color: var(--muted);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }
  .topic-mobile-jump {
    width: 100%;
    min-height: 48px;
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text);
    padding: 0 40px 0 12px;
    font: inherit;
  }
  .topic-mobile-types {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 2px 2px 6px;
    scrollbar-width: thin;
  }
  .topic-mobile-types .idea-type-pill {
    flex: 0 0 auto;
    min-height: 44px;
  }

  .topic-mobile-tag-note {
    margin: 0;
    color: var(--muted);
    font-size: 11.5px;
    line-height: 1.45;
  }
  .idea-promo-card {
    grid-template-columns: 1fr;
    padding: 32px 24px;
  }
  .idea-promo-visual {
    display: none;
  }
}

@media (max-width: 900px) {
  .idea-hero-wrapper {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .idea-hero-main {
    max-width: 760px;
  }

  .idea-hero-stats {
    width: 100%;
  }

  .idea-topics-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .wb-cards-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .planner-tray-meta {
    flex: 1 1 100%;
  }

  .idea-planner-tray {
    width: min(760px, calc(100% - 32px));
  }
}

@media (max-width: 920px) {
  .section-ps-head.ps-cols-3 {
    display: none;
  }

  .section-ps-row.ps-cols-3 {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .section-ps-row.ps-cols-3 .ps-arrow {
    display: none;
  }

  .section-ps-row.ps-cols-3 .ps-cell {
    display: grid;
    gap: 4px;
    padding: 4px 0;
  }

  .section-ps-row.ps-cols-3 .ps-mobile-label {
    display: block;
    color: var(--brand-red);
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }
}

@media (max-width: 768px) {
  .idea-book-main {
    padding-top: 58px;
  }

  .idea-book-main > .container {
    padding-inline: 20px;
  }

  .idea-hero-section {
    padding: 36px 0 30px;
    margin-bottom: 24px;
  }

  .idea-hero-title {
    font-size: clamp(36px, 10vw, 48px);
  }

  .idea-filter-bar {
    gap: 14px;
  }

  .idea-types-scroll,
  .topic-mobile-types {
    flex-wrap: nowrap;
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    justify-content: flex-start;
    padding: 2px 30px 8px 2px;
    scrollbar-width: none;
    overscroll-behavior-inline: contain;
    -webkit-mask-image: linear-gradient(to right, #000 0, #000 calc(100% - 30px), transparent 100%);
    mask-image: linear-gradient(to right, #000 0, #000 calc(100% - 30px), transparent 100%);
  }

  .idea-types-scroll::-webkit-scrollbar,
  .topic-mobile-types::-webkit-scrollbar {
    display: none;
  }

  .idea-types-scroll > *,
  .topic-mobile-types > * {
    flex: 0 0 auto;
  }

  .idea-type-pill {
    min-height: 44px;
  }

  .idea-filter-note {
    margin-bottom: 24px;
    font-size: 13px;
  }

  .topic-detail-nav {
    align-items: stretch;
  }

  .topic-nav-prevnext {
    flex: 1 1 100%;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .topic-prevnext-btn {
    max-width: none;
    min-width: 0;
    min-height: 44px;
  }

  .topic-title-area {
    align-items: flex-start;
  }

  .topic-detail-stats {
    width: 100%;
    gap: 12px 20px;
  }

  .topic-mobile-tools {
    margin-top: -12px;
  }

  .section-cols-grid {
    grid-template-columns: 1fr;
  }

  .section-col-block {
    border-right: none;
    border-bottom: 1px solid var(--surface-border);
  }

  .section-col-block:last-child {
    border-bottom: none;
  }

  .section-ps-head {
    display: none;
  }

  .section-ps-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .section-ps-row.ps-cols-2,
  .section-ps-row.ps-cols-3 {
    grid-template-columns: 1fr;
  }
  .ps-arrow {
    display: none;
  }

  .ps-cell {
    display: grid;
    gap: 4px;
    padding: 4px 0;
  }
  .ps-mobile-label {
    display: block;
    color: var(--brand-red);
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }
  .idea-planner-tray {
    bottom: max(12px, env(safe-area-inset-bottom, 0px));
    width: calc(100% - 24px);
    padding: 14px;
    max-height: calc(100dvh - 80px - env(safe-area-inset-bottom, 0px));
    overflow-y: auto;
    overscroll-behavior: contain;
    align-items: stretch;
  }

  .planner-slots-grid {
    flex-basis: 100%;
  }

  .idea-book-main.has-planner {
    padding-bottom: var(--planner-clearance, 360px);
  }

  .planner-tray-actions {
    flex: 0 0 auto;
  }

  .planner-copy-btn,
  .planner-clear-btn {
    min-height: 44px;
  }

  .slot-remove-btn {
    flex-basis: 44px;
    width: 44px;
    min-height: 44px;
  }

  .section-q-text,
  .idea-text {
    font-size: 15.5px;
  }

  .idea-wordbank-section {
    padding: 30px 24px 32px;
  }

  .wb-header-area {
    align-items: stretch;
  }

  .wb-filter-input {
    width: 100%;
  }

  .idea-promo-section {
    padding: 36px 0;
  }

  .idea-promo-card {
    padding: 28px 20px;
    gap: 24px;
  }
}

@media (max-width: 639px) {
  .idea-book-main > .container {
    padding-inline: 16px;
  }

  .idea-topics-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .idea-topic-card {
    padding: 22px 20px 20px;
  }

  .idea-card-title {
    min-height: 0;
  }

  .idea-hero-stats {
    gap: 10px;
  }

  .idea-stat-box {
    min-height: 100px;
    padding: 16px;
  }

  .idea-stat-label {
    font-size: 11.5px;
  }

  .topic-main-heading {
    font-size: clamp(34px, 10vw, 44px);
  }

  .section-card-header,
  .section-col-block,
  .section-ps-container {
    padding-left: 18px;
    padding-right: 18px;
  }

  .wb-cards-grid {
    grid-template-columns: 1fr;
  }

  .idea-wordbank-section {
    padding: 26px 18px 28px;
  }

  .planner-slots-grid {
    grid-template-columns: 1fr;
  }

  .planner-tray-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.7fr);
    width: 100%;
  }

  .topic-bottom-prevnext {
    grid-template-columns: 1fr;
  }

  .topic-pn-card.next {
    text-align: left;
  }
}

@media (max-width: 520px) {
  .topic-nav-prevnext {
    grid-template-columns: 1fr;
  }

  .idea-card-footer {
    align-items: flex-start;
  }

  .idea-card-link {
    margin-left: 0;
  }
}

@media (max-width: 360px) {
  .idea-book-main > .container {
    padding-inline: 14px;
  }

  .idea-hero-title {
    font-size: 34px;
  }

  .idea-stat-box {
    padding: 14px 12px;
  }

  .idea-stat-val {
    font-size: 26px;
  }

  .topic-mobile-tools {
    padding: 14px;
  }

  .planner-tray-actions {
    grid-template-columns: 1fr;
  }
}

@keyframes idea-soft-enter {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .idea-hero-main,
  .topic-detail-header {
    animation: idea-soft-enter 0.56s var(--idea-ease) both;
  }

  .idea-hero-stats {
    animation: idea-soft-enter 0.56s var(--idea-ease) 80ms both;
  }

  .idea-filter-bar,
  .topic-mobile-tools {
    animation: idea-soft-enter 0.5s var(--idea-ease) 140ms both;
  }

  .idea-filter-note {
    animation: idea-soft-enter 0.46s var(--idea-ease) 190ms both;
  }
}

@media (prefers-reduced-motion: reduce) {
  .idea-hero-main,
  .idea-hero-stats,
  .idea-filter-bar,
  .idea-filter-note,
  .topic-detail-header,
  .topic-mobile-tools {
    animation: none !important;
  }

  .idea-stat-box,
  .idea-search-input,
  .idea-search-icon,
  .idea-type-pill,
  .idea-topic-card,
  .idea-card-link,
  .topic-back-link,
  .topic-prevnext-btn,
  .topic-sidebar-link,
  .idea-section-card,
  .idea-item-row,
  .section-ps-row,
  .wb-filter-input,
  .wb-term-card,
  .topic-pn-card,
  .idea-promo-btn {
    transition: none !important;
  }

  html:focus-within {
    scroll-behavior: auto;
  }

  .idea-stat-box:hover,
  .idea-type-pill:hover,
  .idea-topic-card:hover,
  .topic-back-link:hover,
  .topic-prevnext-btn:hover,
  .topic-sidebar-link:hover,
  .idea-item-row:hover,
  .section-ps-row:hover,
  .wb-term-card:hover,
  .topic-pn-card:hover,
  .idea-promo-btn:hover,
  .idea-promo-card:hover .idea-promo-btn {
    transform: none !important;
  }
}