/* ==========================================================================
   EduWonderLab · Grade 6 Reveal Math Fluency Index Styles
   Shared enhancements for the 54-lesson public fluency index and studio router
   ========================================================================== */

/* Override student-mode rule in styles.css that hid #tab-lessons */
body.mode-student #tab-lessons,
body.student-mode #tab-lessons {
  display: inline-flex !important;
}

body.mode-student .viewtab,
body.student-mode .viewtab {
  cursor: pointer;
}

/* Fluency Index Hero Banner */
.fluency-hero {
  background: linear-gradient(135deg, #0f2b5c 0%, #1a56c4 60%, #2563eb 100%);
  color: #fff;
  border-radius: var(--r-lg, 16px);
  padding: 32px 36px;
  margin-bottom: 24px;
  box-shadow: 0 10px 25px -5px rgba(26, 86, 196, 0.25);
  position: relative;
  overflow: hidden;
}

.fluency-hero::after {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.12) 0%, rgba(255, 255, 255, 0) 70%);
  pointer-events: none;
}

.fluency-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.fluency-hero h1 {
  font-family: var(--font-display, Georgia, serif);
  font-size: 32px;
  line-height: 1.2;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.015em;
}

.fluency-hero p.lead {
  font-size: 16px;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.92);
  max-width: 800px;
  margin-bottom: 20px;
}

.fluency-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.fluency-stat-pill {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #fff;
}

.fluency-stat-pill strong {
  color: #fff;
  font-weight: 800;
}

/* Toolbar adjustments for public index */
.fluency-toolbar {
  background: var(--surface, #ffffff);
  border: 1px solid var(--line, #e2e8f0);
  border-radius: var(--r-md, 10px);
  padding: 16px 20px;
  margin-bottom: 28px;
  box-shadow: var(--shadow-1, 0 1px 3px rgba(0,0,0,0.06));
}

.fluency-toolbar-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.fluency-search-box {
  position: relative;
  flex: 1 1 320px;
}

.fluency-search-box input {
  width: 100%;
  font: inherit;
  font-size: 14.5px;
  padding: 10px 36px 10px 38px;
  border: 1px solid var(--line-strong, #cbd5e1);
  border-radius: var(--r-sm, 6px);
  background: var(--surface-sunk, #f8fafc);
  color: var(--ink, #0f172a);
}

.fluency-search-box input:focus {
  outline: 3px solid var(--accent, #1a56c4);
  outline-offset: 1px;
  background: var(--surface, #ffffff);
}

.fluency-search-box .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--ink-4, #64748b);
  pointer-events: none;
}

.fluency-search-box .clear-btn {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: 18px;
  color: var(--ink-4, #64748b);
  cursor: pointer;
  padding: 2px 6px;
  line-height: 1;
}

.fluency-filters-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.fluency-select {
  font: inherit;
  font-size: 13.5px;
  font-weight: 600;
  padding: 9px 12px;
  border: 1px solid var(--line-strong, #cbd5e1);
  border-radius: var(--r-sm, 6px);
  background: var(--surface, #ffffff);
  color: var(--ink-2, #1e293b);
}

.fluency-results-count {
  margin-left: auto;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-3, #475569);
}

/* Domain pills row */
.fluency-domain-pills {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--line, #e2e8f0);
}

.domain-pill {
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  padding: 5px 12px;
  border: 1px solid var(--line-strong, #cbd5e1);
  border-radius: var(--r-pill, 999px);
  background: var(--surface, #ffffff);
  color: var(--ink-3, #334155);
  cursor: pointer;
  transition: all 0.15s ease;
}

.domain-pill:hover {
  border-color: var(--accent, #1a56c4);
  color: var(--accent, #1a56c4);
}

.domain-pill.active {
  background: var(--accent, #1a56c4);
  border-color: var(--accent, #1a56c4);
  color: #fff;
}

/* Unit Blocks & Cards */
.unit-block {
  margin-bottom: 40px;
  scroll-margin-top: calc(var(--stack-h, 113px) + 20px);
}

.unit-banner {
  background: linear-gradient(135deg, #1e3a8a 0%, #1a56c4 100%);
  color: #fff;
  border-radius: var(--r-lg, 16px) var(--r-lg, 16px) 0 0;
  padding: 22px 28px;
}

.unit-banner-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.unit-badge-tag {
  font-size: 11.5px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  opacity: 0.9;
}

.unit-count-pill {
  font-size: 12px;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.18);
  padding: 3px 10px;
  border-radius: var(--r-pill, 999px);
}

.unit-banner h2 {
  font-family: var(--font-display, Georgia, serif);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: 8px;
}

.unit-premise-text {
  font-size: 14px;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.92);
  border-left: 2px solid rgba(255, 255, 255, 0.4);
  padding-left: 12px;
  max-width: 95ch;
}

.unit-lessons-grid {
  display: grid;
  gap: 16px;
  padding: 20px;
  background: var(--surface-sunk, #f1f5f9);
  border: 1px solid var(--line, #e2e8f0);
  border-top: 0;
  border-radius: 0 0 var(--r-lg, 16px) var(--r-lg, 16px);
}

/* Lesson Card */
.fluency-lesson-card {
  background: var(--surface, #ffffff);
  border: 1px solid var(--line, #e2e8f0);
  border-radius: var(--r-md, 10px);
  box-shadow: var(--shadow-1, 0 1px 3px rgba(0,0,0,0.06));
  overflow: hidden;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  scroll-margin-top: calc(var(--stack-h, 113px) + 20px);
}

.fluency-lesson-card:hover {
  box-shadow: var(--shadow-2, 0 4px 12px rgba(0,0,0,0.08));
}

.fluency-lesson-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
  padding: 16px 20px 14px;
  border-bottom: 1px solid var(--line, #e2e8f0);
}

.lesson-badge-id {
  display: inline-block;
  font-family: var(--font-mono, monospace);
  font-size: 11.5px;
  font-weight: 700;
  background: var(--ink, #0f172a);
  color: var(--ink-inv, #ffffff);
  padding: 2px 9px;
  border-radius: 4px;
  margin-bottom: 6px;
}

.fluency-lesson-header h3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink, #0f172a);
}

.lesson-subtopics {
  font-size: 13px;
  color: var(--ink-3, #475569);
  margin-top: 3px;
}

.lesson-chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.standard-badge {
  font-family: var(--font-mono, monospace);
  font-size: 11.5px;
  font-weight: 700;
  background: #F7F4EC;
  color: #17324D;
  padding: 3px 9px;
  border-radius: 4px;
}

/* Card Body Columns */
.fluency-lesson-body {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 0;
}

@media (max-width: 900px) {
  .fluency-lesson-body {
    grid-template-columns: 1fr;
  }
}

.lesson-col-skills {
  padding: 16px 20px;
}

.lesson-col-check {
  padding: 16px 20px;
  border-left: 1px solid var(--line, #e2e8f0);
  background: var(--surface-sunk, #f8fafc);
  display: flex;
  flex-direction: column;
}

@media (max-width: 900px) {
  .lesson-col-check {
    border-left: 0;
    border-top: 1px solid var(--line, #e2e8f0);
  }
}

.col-heading {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-3, #475569);
  margin-bottom: 12px;
}

.skills-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.skill-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.45;
}

.skill-number {
  flex: none;
  width: 20px;
  height: 20px;
  border-radius: 4px;
  background: var(--surface-sunk, #f1f5f9);
  border: 1px solid var(--line, #cbd5e1);
  color: var(--ink-3, #475569);
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 800;
  margin-top: 1px;
}

.skill-text-content {
  flex: 1;
  color: var(--ink-2, #1e293b);
}

.origin-badge {
  flex: none;
  font-size: 10.5px;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 999px;
  white-space: nowrap;
}

.origin-badge.elem {
  background: #e0f2fe;
  color: #0369a1;
}

.origin-badge.spiral {
  background: #fef3c7;
  color: #b45309;
}

.qc-card-box {
  background: var(--surface, #ffffff);
  border: 1px solid var(--line, #cbd5e1);
  border-left: 4px solid var(--ok, #047857);
  border-radius: var(--r-sm, 6px);
  padding: 12px 14px;
  margin-bottom: 14px;
}

.qc-card-prompt {
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink, #0f172a);
}

.lesson-card-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: auto;
  padding-top: 8px;
}

/* Practice Accordion in Card */
.practice-drawer {
  border-top: 1px solid var(--line, #e2e8f0);
  background: var(--surface-sunk, #f8fafc);
  padding: 16px 20px;
  display: none;
}

.practice-drawer.open {
  display: block;
}

.practice-drawer-title {
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-3, #475569);
  margin-bottom: 12px;
}

.practice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
}

.practice-mini-card {
  background: var(--surface, #ffffff);
  border: 1px solid var(--line, #e2e8f0);
  border-radius: var(--r-sm, 6px);
  padding: 10px 12px;
  font-size: 13px;
}

.practice-mini-prompt {
  font-weight: 600;
  color: var(--ink, #0f172a);
  margin-bottom: 6px;
}

.practice-mini-answer {
  color: var(--ok, #047857);
  font-weight: 700;
  font-size: 12.5px;
}

/* Studio View Wrapper & Back Navigation */
.studio-nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--surface, #ffffff);
  border: 1px solid var(--line, #e2e8f0);
  border-radius: var(--r-md, 10px);
  padding: 10px 16px;
  margin-bottom: 16px;
}

.studio-nav-bar .btn-back {
  font-weight: 700;
  color: var(--accent, #1a56c4);
}

/* Dark Mode Tokens */
[data-theme="dark"] .fluency-hero {
  background: linear-gradient(135deg, #0b1c3d 0%, #172554 60%, #1e3a8a 100%);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .fluency-toolbar {
  background: var(--surface, #131c2e);
  border-color: var(--line, #24314b);
}

[data-theme="dark"] .fluency-search-box input {
  background: var(--surface-sunk, #0f1727);
  border-color: var(--line-strong, #35466a);
  color: var(--ink, #f8fafc);
}

[data-theme="dark"] .fluency-select {
  background: var(--surface, #131c2e);
  border-color: var(--line-strong, #35466a);
  color: var(--ink, #f8fafc);
}

[data-theme="dark"] .domain-pill {
  background: var(--surface, #131c2e);
  border-color: var(--line-strong, #35466a);
  color: var(--ink-2, #e2e8f0);
}

[data-theme="dark"] .domain-pill.active {
  background: var(--accent, #60a5fa);
  border-color: var(--accent, #60a5fa);
  color: #0b1220;
}

[data-theme="dark"] .unit-banner {
  background: linear-gradient(135deg, #172554 0%, #1e40af 100%);
}

[data-theme="dark"] .unit-lessons-grid {
  background: var(--surface-sunk, #0f1727);
  border-color: var(--line, #24314b);
}

[data-theme="dark"] .fluency-lesson-card {
  background: var(--surface, #131c2e);
  border-color: var(--line, #24314b);
}

[data-theme="dark"] .lesson-col-check {
  background: var(--surface-sunk, #0f1727);
  border-color: var(--line, #24314b);
}

[data-theme="dark"] .qc-card-box {
  background: var(--surface, #131c2e);
  border-color: var(--line, #24314b);
}

[data-theme="dark"] .qc-card-prompt {
  color: var(--ink, #f8fafc);
}

[data-theme="dark"] .standard-badge {
  background: #17324D;
  color: #17324D;
}

[data-theme="dark"] .origin-badge.elem {
  background: #082f49;
  color: #7dd3fc;
}

[data-theme="dark"] .origin-badge.spiral {
  background: #451a03;
  color: #fde68a;
}

[data-theme="dark"] .practice-drawer {
  background: var(--surface-sunk, #0f1727);
  border-color: var(--line, #24314b);
}

[data-theme="dark"] .practice-mini-card {
  background: var(--surface, #131c2e);
  border-color: var(--line, #24314b);
}

/* Why this unlocks the lesson: one calm line between the lesson title and its skills. */
.why-unlocks {
  margin: 0;
  padding: 10px 20px;
  background: #eef4fb;
  border-top: 1px solid var(--line, #e2e8f0);
  border-bottom: 1px solid var(--line, #e2e8f0);
  color: var(--ink-2, #1e293b);
  font-size: 14px;
  line-height: 1.5;
}
.why-unlocks strong { color: var(--accent, #1a56c4); }

/* A select sizes itself to its longest option; at phone width that pushed the page sideways. */
.fluency-filters-group { max-width: 100%; }
.fluency-select { max-width: 100%; min-width: 0; text-overflow: ellipsis; }

/* Headings on the blue hero and unit banners inherited the page's dark ink and vanished into the gradient. */
.curriculum-product .fluency-hero h1, .curriculum-product .unit-banner h2 { color: #fff; }

/* Unit dropdowns */
.unit-lessons-grid[hidden] { display: none; }
.unit-block.unit-collapsed .unit-banner { border-radius: var(--r-lg, 16px); }
.unit-toggle-btn {
  min-height: 44px; padding: 6px 18px; border: 2px solid #fff; border-radius: 999px;
  background: transparent; color: #fff; font: inherit; font-weight: 700; cursor: pointer;
}
.unit-toggle-btn:hover { background: rgba(255, 255, 255, 0.16); }
.unit-toggle-btn:focus-visible { outline: 3px solid #f5a623; outline-offset: 3px; }
.unit-tools { display: flex; gap: 10px; margin: 0 0 16px; }
.unit-tools[hidden] { display: none; }
.unit-tools button {
  min-height: 44px; padding: 6px 16px; border: 2px solid #1a56c4; border-radius: 999px;
  background: #fff; color: #1a56c4; font: inherit; font-weight: 700; cursor: pointer;
}
.unit-tools button:focus-visible { outline: 3px solid #f5a623; outline-offset: 3px; }