/*
Theme Name: FluencyFlow
Theme URI: https://englishmamonline.com/fluencyflow
Author: EnglishMam Team & Antigravity
Author URI: https://englishmamonline.com
Description: A highly-animated, modern WordPress theme tailored for Spoken English & Grammar Learning. Features specialized templates for interactive lessons, diagnostic quizzes, and spoken dialogue audio drills.
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: fluencyflow
Tags: edtech, education, interactive, translation-ready, custom-menu, custom-background, two-columns, featured-images, flexible-header
*/

/* ==========================================
   1. DESIGN SYSTEM & VARIABLE DEFINITIONS
   ========================================== */
:root {
  /* Colors - Shifted to Soft Premium Pastels */
  --color-navy-dark: #1E293B;
  --color-navy-card: #334155;
  --color-indigo: #818CF8;
  --color-indigo-hover: #6366F1;
  --color-indigo-light: #EEF2FF;
  --color-emerald: #34D399;
  --color-emerald-light: #E6FDF4;
  --color-rose: #F87171;
  --color-rose-light: #FFF1F2;
  --color-slate-bg: #F8FAFC;
  --color-slate-border: #E2E8F0;
  --color-slate-text: #475569;
  --color-slate-muted: #64748B;
  --color-white: #FFFFFF;


  /* Typography */
  --font-ui: 'Plus Jakarta Sans', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-serif: 'Merriweather', Georgia, serif;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-glow: 0 0 20px 0 rgba(99, 102, 241, 0.15);

  /* Border Radii */
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================
   2. RESET & BASE STYLES
   ========================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-ui);
  background-color: var(--color-slate-bg);
  color: var(--color-slate-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-indigo);
  text-decoration: none;
  transition: var(--transition-fast);
}

a:hover {
  color: var(--color-indigo-hover);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-navy-dark);
  font-weight: 700;
  line-height: 1.25;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: 1rem;
}

/* Container */
.container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* ==========================================
   3. LAYOUT & HEADER/FOOTER STYLES
   ========================================== */
.site-header {
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-slate-border);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1rem 0;
  transition: var(--transition-normal);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
  padding: 0.75rem 0;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-logo a {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-navy-dark);
  text-decoration: none;
}

.site-logo span {
  color: var(--color-indigo);
}

.main-navigation ul {
  list-style: none;
  display: flex;
  gap: 2rem;
  align-items: center;
}

.main-navigation a {
  color: var(--color-slate-text);
  font-weight: 600;
  font-size: 0.95rem;
  position: relative;
  padding: 0.5rem 0;
}

.main-navigation a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-indigo);
  transition: var(--transition-normal);
}

.main-navigation a:hover::after,
.main-navigation .current-menu-item a::after {
  width: 100%;
}

.main-navigation a:hover {
  color: var(--color-indigo);
}

.header-ctas {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition-normal);
  gap: 0.5rem;
}

.btn-primary {
  background-color: var(--color-indigo);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--color-indigo-hover);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-secondary {
  background-color: transparent;
  border-color: var(--color-slate-border);
  color: var(--color-navy-dark);
}

.btn-secondary:hover {
  background-color: var(--color-slate-bg);
  border-color: var(--color-slate-muted);
  transform: translateY(-2px);
}

.btn-success {
  background-color: var(--color-emerald);
  color: var(--color-white);
}

.btn-success:hover {
  background-color: #059669;
  color: var(--color-white);
  transform: translateY(-2px);
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 102;
}

.mobile-nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-navy-dark);
  margin-bottom: 5px;
  transition: var(--transition-normal);
}

.mobile-nav-toggle span:last-child {
  margin-bottom: 0;
}

.mobile-nav-toggle.open span:first-child {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.mobile-nav-toggle.open span:last-child {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Nav Overlay */
.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-navy-dark);
  z-index: 101;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  transform: translateY(-100%);
  transition: var(--transition-slow);
}

.mobile-nav-overlay.open {
  transform: translateY(0);
}

.mobile-nav-overlay ul {
  list-style: none;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.mobile-nav-overlay a {
  color: var(--color-white);
  font-size: 1.8rem;
  font-weight: 700;
}

.mobile-nav-overlay a:hover {
  color: var(--color-indigo);
}

.mobile-nav-overlay .btn {
  margin-top: 2rem;
}

/* Footer */
.site-footer {
  background-color: var(--color-navy-dark);
  color: #94A3B8;
  padding: 5rem 0 2rem;
  font-size: 0.95rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 2fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-widget h3 {
  color: var(--color-white);
  margin-bottom: 1.5rem;
  font-size: 1.15rem;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 1rem;
}

.footer-logo span {
  color: var(--color-indigo);
}

.footer-widget ul {
  list-style: none;
}

.footer-widget li {
  margin-bottom: 0.75rem;
}

.footer-widget a {
  color: #94A3B8;
}

.footer-widget a:hover {
  color: var(--color-white);
}

.newsletter-form {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

.newsletter-form input[type="email"] {
  flex-grow: 1;
  padding: 0.75rem;
  border-radius: var(--radius-md);
  border: 1px solid #334155;
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--color-white);
  font-size: 0.9rem;
}

.newsletter-form input:focus {
  outline: none;
  border-color: var(--color-indigo);
}

.footer-bottom {
  border-top: 1px solid #1E293B;
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

/* ==========================================
   4. HOMEPAGE (front-page.php) TEMPLATE
   ========================================== */
.hero-section {
  padding: 6rem 0;
  background: radial-gradient(circle at 80% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 60%),
              radial-gradient(circle at 10% 80%, rgba(16, 185, 129, 0.05) 0%, transparent 50%);
  overflow: hidden;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
  align-items: center;
}

.hero-tag {
  display: inline-block;
  background-color: var(--color-indigo-light);
  color: var(--color-indigo);
  padding: 0.35rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  color: var(--color-navy-dark);
}

.hero-title span {
  background: linear-gradient(135deg, var(--color-indigo) 0%, #818CF8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--color-slate-muted);
  margin-bottom: 2.5rem;
  max-width: 580px;
}

.hero-ctas {
  display: flex;
  gap: 1rem;
  margin-bottom: 4rem;
}

.stats-ticker {
  display: flex;
  gap: 3rem;
  border-top: 1px solid var(--color-slate-border);
  padding-top: 2rem;
}

.stat-item h3 {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-indigo);
}

.stat-item p {
  font-size: 0.9rem;
  color: var(--color-slate-muted);
  font-weight: 600;
}

.hero-visual {
  position: relative;
}

.hero-card {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-slate-border);
  position: relative;
  z-index: 2;
}

.hero-card-glow {
  position: absolute;
  top: -5%;
  right: -5%;
  width: 110%;
  height: 110%;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(16, 185, 129, 0.1) 100%);
  filter: blur(24px);
  border-radius: var(--radius-xl);
  z-index: 1;
}

/* 4-Pillar Grid */
.pillars-section {
  padding: 6rem 0;
  background-color: var(--color-white);
}

.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 4rem;
}

.section-header h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--color-slate-muted);
  font-size: 1.1rem;
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.pillar-card {
  background-color: var(--color-slate-bg);
  padding: 2.5rem 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-slate-border);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.pillar-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--color-indigo);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition-normal);
}

.pillar-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(99, 102, 241, 0.2);
  background-color: var(--color-white);
}

.pillar-card:hover::before {
  transform: scaleX(1);
}

.pillar-icon {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background-color: var(--color-indigo-light);
  color: var(--color-indigo);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  transition: var(--transition-normal);
}

.pillar-card:hover .pillar-icon {
  background-color: var(--color-indigo);
  color: var(--color-white);
}

.pillar-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.pillar-card p {
  color: var(--color-slate-muted);
  font-size: 0.95rem;
  flex-grow: 1;
  margin-bottom: 1.5rem;
}

.pillar-link {
  font-weight: 700;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

/* Word of the Day Block */
.wotd-section {
  padding: 6rem 0;
  background-color: var(--color-slate-bg);
}

.wotd-card {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  padding: 3rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-slate-border);
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4rem;
  align-items: center;
}

.wotd-badge {
  background-color: #FEF3C7;
  color: #D97706;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: inline-block;
  margin-bottom: 1rem;
}

.wotd-term h3 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.wotd-phonetic {
  font-family: var(--font-serif);
  color: var(--color-slate-muted);
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-audio-speak {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background-color: var(--color-indigo-light);
  color: var(--color-indigo);
  border: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-audio-speak:hover {
  background-color: var(--color-indigo);
  color: var(--color-white);
}

.wotd-meta {
  border-left: 4px solid var(--color-indigo);
  padding-left: 2rem;
}

.wotd-definition {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--color-navy-dark);
}

.wotd-example {
  font-style: italic;
  color: var(--color-slate-muted);
  font-family: var(--font-serif);
}

/* Diagnostic Quiz Widget */
.quiz-widget-section {
  padding: 6rem 0;
  background-color: var(--color-white);
}

.quiz-container {
  max-width: 780px;
  margin: 0 auto;
  background-color: var(--color-slate-bg);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-slate-border);
  box-shadow: var(--shadow-lg);
  padding: 3rem;
  position: relative;
  overflow: hidden;
}

.quiz-header {
  border-bottom: 1px solid var(--color-slate-border);
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.quiz-progress-bar {
  flex-grow: 1;
  height: 6px;
  background-color: var(--color-slate-border);
  border-radius: var(--radius-full);
  margin-right: 1.5rem;
  position: relative;
  overflow: hidden;
}

.quiz-progress-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 10%;
  background-color: var(--color-indigo);
  transition: var(--transition-normal);
}

.quiz-question-number {
  font-weight: 700;
  color: var(--color-indigo);
  white-space: nowrap;
}

.quiz-card {
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.quiz-question {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-navy-dark);
  margin-bottom: 2rem;
}

.quiz-options {
  display: grid;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.quiz-option {
  background-color: var(--color-white);
  border: 2px solid var(--color-slate-border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  font-weight: 600;
}

.quiz-option:hover {
  border-color: var(--color-indigo);
  background-color: var(--color-indigo-light);
}

.quiz-option.selected {
  border-color: var(--color-indigo);
  background-color: var(--color-indigo);
  color: var(--color-white);
}

.quiz-footer {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
}

.quiz-results {
  text-align: center;
  padding: 2rem 0;
  display: none;
}

.quiz-score-circle {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-full);
  background-color: var(--color-indigo-light);
  color: var(--color-indigo);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  margin: 0 auto 2rem;
  border: 4px solid var(--color-indigo);
}

.quiz-score-circle span:first-child {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1;
}

.quiz-score-circle span:last-child {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
}

.quiz-result-title {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.quiz-result-desc {
  color: var(--color-slate-muted);
  margin-bottom: 2rem;
  font-size: 1.05rem;
  line-height: 1.6;
}

/* ==========================================
   5. INTERACTIVE LESSON (single-lessons.php)
   ========================================== */
.lesson-layout {
  display: grid;
  grid-template-columns: 3fr 1fr;
  gap: 3rem;
  padding: 4rem 0;
}

.lesson-progress-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background-color: rgba(226, 232, 240, 0.5);
  z-index: 1010;
}

.lesson-progress-bar {
  height: 100%;
  width: 0%;
  background-color: var(--color-indigo);
  transition: width 0.1s ease;
}

.lesson-content {
  background-color: var(--color-white);
  padding: 3.5rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-slate-border);
  box-shadow: var(--shadow-sm);
}

.lesson-header {
  margin-bottom: 2.5rem;
}

.lesson-title {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.lesson-meta {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.cefr-badge {
  background-color: var(--color-indigo);
  color: var(--color-white);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
}

.skill-badge {
  background-color: var(--color-slate-border);
  color: var(--color-navy-dark);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
}

.lesson-body {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: #1E293B;
  line-height: 1.8;
}

.lesson-body h2 {
  font-family: var(--font-ui);
  font-size: 1.75rem;
  margin: 2.5rem 0 1.25rem;
}

.lesson-body h3 {
  font-family: var(--font-ui);
  font-size: 1.35rem;
  margin: 2rem 0 1rem;
}

.lesson-body p {
  margin-bottom: 1.5rem;
}

.lesson-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-family: var(--font-ui);
  font-size: 0.95rem;
}

.lesson-body th {
  background-color: var(--color-navy-dark);
  color: var(--color-white);
  font-weight: 700;
  padding: 1rem;
  text-align: left;
}

.lesson-body td {
  padding: 1rem;
  border-bottom: 1px solid var(--color-slate-border);
}

.lesson-body tr:nth-child(even) {
  background-color: var(--color-slate-bg);
}

/* Callout Boxes */
.callout-box {
  padding: 1.5rem 2rem;
  border-radius: var(--radius-md);
  margin: 2rem 0;
  font-family: var(--font-ui);
}

.callout-box h4 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.callout-correct {
  background-color: var(--color-emerald-light);
  border-left: 4px solid var(--color-emerald);
  color: #065F46;
}

.callout-correct h4 {
  color: var(--color-emerald);
}

.callout-incorrect {
  background-color: var(--color-rose-light);
  border-left: 4px solid var(--color-rose);
  color: #991B1B;
}

.callout-incorrect h4 {
  color: var(--color-rose);
}

/* Pronunciation Audio Block */
.audio-pronunciation {
  background-color: var(--color-slate-bg);
  border: 1px solid var(--color-slate-border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 1.5rem 0;
  font-family: var(--font-ui);
}

.audio-info {
  display: flex;
  flex-direction: column;
}

.audio-text {
  font-weight: 700;
  font-size: 1.1rem;
}

.audio-phonetic-text {
  font-family: var(--font-serif);
  color: var(--color-slate-muted);
  font-size: 0.9rem;
}

/* End of Lesson Quiz */
.lesson-quiz-box {
  background-color: var(--color-slate-bg);
  border: 1px solid var(--color-slate-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  margin: 3rem 0;
  font-family: var(--font-ui);
}

.lesson-quiz-box h3 {
  font-size: 1.4rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-slate-border);
  padding-bottom: 0.75rem;
}

.lesson-quiz-question {
  margin-bottom: 2rem;
}

.lesson-quiz-question p {
  font-weight: 700;
  margin-bottom: 1rem;
}

.lesson-quiz-options {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.lesson-quiz-btn {
  background: var(--color-white);
  border: 1px solid var(--color-slate-border);
  padding: 0.85rem 1.25rem;
  text-align: left;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
  transition: var(--transition-fast);
}

.lesson-quiz-btn:hover {
  border-color: var(--color-indigo);
  background-color: var(--color-indigo-light);
}

.lesson-quiz-btn.correct {
  background-color: var(--color-emerald-light) !important;
  border-color: var(--color-emerald) !important;
  color: #065F46;
}

.lesson-quiz-btn.incorrect {
  background-color: var(--color-rose-light) !important;
  border-color: var(--color-rose) !important;
  color: #991B1B;
}

.lesson-quiz-feedback {
  margin-top: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  display: none;
}

.lesson-quiz-feedback.show {
  display: block;
}

/* Sidebar TOC */
.lesson-sidebar {
  position: sticky;
  top: 120px;
  height: fit-content;
}

.toc-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-slate-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

.toc-card h3 {
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
  color: var(--color-slate-muted);
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.toc-link {
  color: var(--color-slate-text);
  font-weight: 600;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.toc-link::before {
  content: '';
  width: 6px;
  height: 6px;
  background-color: var(--color-slate-border);
  border-radius: var(--radius-full);
  transition: var(--transition-fast);
}

.toc-link.active {
  color: var(--color-indigo);
}

.toc-link.active::before {
  background-color: var(--color-indigo);
  transform: scale(1.5);
}

/* ==========================================
   6. DIALOGUE ROLEPLAY (single-dialogues.php)
   ========================================== */
.dialogue-layout {
  max-width: 880px;
  margin: 4rem auto;
}

.dialogue-card {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  padding: 3rem;
  border: 1px solid var(--color-slate-border);
  box-shadow: var(--shadow-md);
}

.dialogue-header {
  margin-bottom: 3rem;
  text-align: center;
}

.dialogue-header h1 {
  font-size: 2.2rem;
  margin-bottom: 0.75rem;
}

.dialogue-meta-badges {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 1rem;
}

/* Roleplay Selector Toggle */
.dialogue-controls {
  background-color: var(--color-slate-bg);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  margin-bottom: 3rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  border: 1px solid var(--color-slate-border);
}

.role-selectors {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.role-btn {
  background-color: var(--color-white);
  border: 2px solid var(--color-slate-border);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.role-btn.active {
  border-color: var(--color-indigo);
  background-color: var(--color-indigo);
  color: var(--color-white);
}

/* Chat bubble loop */
.dialogue-transcript {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.chat-bubble-wrapper {
  display: flex;
  flex-direction: column;
  width: 100%;
}

.chat-bubble-wrapper.speaker-a {
  align-items: flex-start;
}

.chat-bubble-wrapper.speaker-b {
  align-items: flex-end;
}

.speaker-label {
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--color-slate-muted);
  margin-bottom: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0 0.5rem;
}

.chat-bubble {
  max-width: 75%;
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.75rem;
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: var(--transition-normal);
}

.speaker-a .chat-bubble {
  background-color: var(--color-indigo-light);
  border-bottom-left-radius: var(--radius-sm);
  border: 1px solid rgba(99, 102, 241, 0.15);
  color: var(--color-navy-dark);
}

.speaker-b .chat-bubble {
  background-color: var(--color-emerald-light);
  border-bottom-right-radius: var(--radius-sm);
  border: 1px solid rgba(16, 185, 129, 0.15);
  color: #065F46;
}

.chat-text {
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.chat-stress-word {
  text-decoration: underline;
  text-decoration-color: var(--color-indigo);
  text-decoration-thickness: 2px;
  font-weight: 700;
}

.speaker-b .chat-stress-word {
  text-decoration-color: var(--color-emerald);
}

.chat-translation {
  font-size: 0.9rem;
  color: var(--color-slate-muted);
  font-style: italic;
}

.chat-bubble-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.75rem;
  border-top: 1px solid rgba(0,0,0,0.05);
  padding-top: 0.5rem;
}

.bubble-btn {
  background: none;
  border: none;
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  color: var(--color-indigo);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.speaker-b .bubble-btn {
  color: var(--color-emerald);
}

/* Dimming roles in practice mode */
.shadow-practice-mode .chat-bubble-wrapper.muted {
  opacity: 0.4;
}

.shadow-practice-mode .chat-bubble-wrapper.active-role .chat-bubble {
  box-shadow: 0 0 0 3px var(--color-indigo);
}

.shadow-practice-mode .chat-bubble-wrapper.active-role.speaker-b .chat-bubble {
  box-shadow: 0 0 0 3px var(--color-emerald);
}

/* ==========================================
   7. DIRECTORY ARCHIVES & FILTER INTERFACE
   ========================================== */
.archive-layout {
  padding: 4rem 0;
}

.archive-header {
  margin-bottom: 3rem;
}

.filter-bar {
  background-color: var(--color-white);
  border: 1px solid var(--color-slate-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 2rem;
  margin-bottom: 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  box-shadow: var(--shadow-sm);
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.filter-label {
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  color: var(--color-slate-muted);
}

.filter-select {
  padding: 0.5rem 2rem 0.5rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-slate-border);
  background-color: var(--color-slate-bg);
  font-weight: 600;
  outline: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

.filter-select:focus {
  border-color: var(--color-indigo);
}

.archive-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.archive-card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-slate-border);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: var(--transition-normal);
}

.archive-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.archive-card-image {
  height: 200px;
  background-color: var(--color-indigo-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--color-indigo);
  position: relative;
}

.archive-card-badges {
  position: absolute;
  top: 1rem;
  left: 1rem;
  display: flex;
  gap: 0.5rem;
}

.archive-card-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.archive-card-title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.archive-card-excerpt {
  font-size: 0.9rem;
  color: var(--color-slate-muted);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

/* ==========================================
   8. RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================== */
@media (max-width: 1024px) {
  .pillars-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .hero-visual {
    order: -1;
    max-width: 580px;
    margin: 0 auto;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .wotd-card {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .lesson-layout {
    grid-template-columns: 1fr;
  }
  .lesson-sidebar {
    display: none; /* Hide TOC on mobile for layout ease */
  }
  .archive-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .site-header {
    padding: 0.75rem 0;
  }
  .main-navigation, .header-ctas .btn:not(.btn-mobile-visible) {
    display: none;
  }
  .mobile-nav-toggle {
    display: block;
  }
  .hero-title {
    font-size: 2.5rem;
  }
  .stats-ticker {
    flex-wrap: wrap;
    gap: 2rem;
  }
  .pillars-grid {
    grid-template-columns: 1fr;
  }
  .filter-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .archive-grid {
    grid-template-columns: 1fr;
  }
  .quiz-container {
    padding: 1.5rem;
  }
  .quiz-header {
    flex-direction: column;
    gap: 1rem;
  }
  .quiz-progress-bar {
    margin-right: 0;
    width: 100%;
  }
  .dialogue-card {
    padding: 1.5rem;
  }
  .role-selectors {
    grid-template-columns: 1fr;
  }
  .chat-bubble {
    max-width: 90%;
  }
  .lesson-content {
    padding: 1.5rem;
  }
  .lesson-title {
    font-size: 2rem;
  }
}

/* ==========================================
   9. STUDENT DASHBOARD & RADAR CHART STYLES
   ========================================== */
@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

#skill-radar-svg {
  overflow: visible;
}
.radar-grid {
  stroke: var(--color-slate-border);
  stroke-dasharray: 2 2;
  stroke-width: 1;
  fill: none;
}
.radar-axis {
  stroke: var(--color-slate-border);
  stroke-width: 1.5;
}
.radar-label {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 700;
  fill: var(--color-slate-muted);
}
.radar-polygon {
  fill: rgba(129, 140, 248, 0.2);
  stroke: var(--color-indigo);
  stroke-width: 2.5;
  transition: all var(--transition-normal);
}
.radar-point {
  fill: var(--color-indigo);
  stroke: var(--color-white);
  stroke-width: 2;
  r: 5;
  transition: all var(--transition-normal);
}

.goal-item:hover {
  border-color: var(--color-indigo) !important;
  transform: translateX(2px);
  box-shadow: var(--shadow-sm);
}

/* ==========================================
   10. INTERACTIVE MICROPHONE VISUALIZER
   ========================================== */
#mic-status-dot.active {
  background-color: var(--color-rose) !important;
  animation: flashRed 1.5s infinite;
}

@keyframes flashRed {
  0% { opacity: 0.4; }
  50% { opacity: 1; }
  100% { opacity: 0.4; }
}

.visualizer-canvas-container canvas {
  display: block;
  width: 100%;
  height: 100%;
}