/* ----------  THEME TOKENS  ---------- */
:root {
  --clr-bg-alt  : #f9fafb;
  --clr-bg      : #ffffff;
  --clr-text    : #1e293b;   /* slate-900  */
  --clr-accent  : #2563eb;   /* blue-600   */
  --clr-accent-lt: #3b82f6;   /* blue-500   */
  --clr-muted   : #64748b;   /* slate-500  */
  --clr-card    : #f8fafc;   /* slate-50   */
  --font-main   : 'Inter', sans-serif;
  --space       : 1rem;
  --border-radius: 12px;
  --transition  : all 0.3s ease;
  --shadow      : 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg   : 0 8px 24px rgba(0, 0, 0, 0.15);
}
[data-theme="dark"] {
  --clr-bg-alt  : #111827;
  --clr-bg      : #0f172a;
  --clr-text    : #f1f5f9;
  --clr-accent  : #3b82f6;
  --clr-accent-lt: #60a5fa;
  --clr-muted   : #94a3b8;
  --clr-card    : #1e293b;
}

/* ----------  BASE  ---------- */
.list li + li { margin-top: 0.5rem; }

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font-main);
  background: var(--clr-bg); /* Default white for home, etc. */
  color: var(--clr-text);
  line-height: 1.6;
  scroll-behavior: smooth;
}
.page--docs {
  background: var(--clr-bg-alt); /* Neutral #f9fafb for doc pages */
}
h1, h2, h3 { font-weight: 700; line-height: 1.25; }
h1 { font-size: clamp(1.6rem, 4vw, 2rem); margin-top: 2rem; margin-bottom: 1rem; }
h2 { font-size: 1.25rem; margin-top: 2rem; margin-bottom: 1rem; }
a { text-decoration: none; color: inherit; }

/* ----------  UTILITIES  ---------- */
.container {
  max-width: 680px;
  margin-inline: auto;
  padding-inline: clamp(calc(var(--space)*1.25), 4vw, calc(var(--space)*1.5));
  width: 100%;
  box-sizing: border-box;
}
.section { padding: calc(var(--space)*4) 0; }
.section-title { text-align: center; margin-bottom: 2rem; }
.btn {
  display: inline-block;
  padding: calc(var(--space)*0.75) calc(var(--space)*1.75);
  border-radius: var(--border-radius);
  background: var(--clr-accent);
  color: #fff;
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-family: var(--font-main);
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  background: #1d4ed8;
}

.btn-outline {
  background: transparent;
  color: var(--clr-accent);
  border: 2px solid var(--clr-accent);
}

.btn-outline:hover {
  background: var(--clr-accent);
  color: #fff;
}
.card {
  background: var(--clr-card);
  border-radius: var(--border-radius);
  padding: 2rem;
  transition: var(--transition);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--clr-accent);
}
.text-muted { color: var(--clr-muted); }
.accent { color: var(--clr-accent); }

/* ----------  HERO  ---------- */
/* ----------  HERO  ---------- */
.hero {
  background: #E0F2FE;
  color: #1e293b;
  padding: 6rem 0;
  min-height: 80vh;
  display: flex;
  align-items: center;
}
[data-theme="dark"] .hero {
  background: #1e3a8a;
  color: #f1f5f9;
}
.hero-inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  align-items: center;
  gap: 3rem;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}
.hero-copy {
  max-width: 550px;
}
.hero-copy h1 {
  font-size: clamp(1.9rem, 4vw + .5rem, 2.75rem);
  line-height: 1.25;
  margin-bottom: 1.25rem;
}
.hero-copy p {
  line-height: 1.7;
  font-size: 1.05rem;
  margin-bottom: 2rem;
}
.hero-img {
  display: block;
  margin: 0;
}
.hero-img img {
  max-width: 100%;
  border-radius: 18px;
  box-shadow: 0 8px 24px rgba(0,0,0,.25);
}

/* ----------  VIDEO ---------- */
.video-wrapper {
  position: relative;
  padding-top: 56.25%;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 6px 18px rgba(0,0,0,.1);
}
.video-wrapper iframe,
.video-wrapper video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* video language picker */
.vid-picker {
  display: flex;
  justify-content: center;
  gap: .5rem;
  margin-bottom: 1.25rem;
}
.vid-picker button {
  background: none;
  border: 2px solid transparent;
  border-radius: 50%;
  padding: 2px;
  cursor: pointer;
  transition: border .25s;
}
.vid-picker button.active,
.vid-picker button:hover { border-color: var(--clr-accent); }
.vid-picker img { width: 32px; height: 32px; border-radius: 50%; }

/* ----------  CARD GRID ---------- */
.card-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}
.card-grid iframe {
  margin-top: 1rem;
  width: 100%;
  height: 460px;
  border: none;
}

/* ----------  PRICING ---------- */
.pricing-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}
.plan-blurb {
  margin-top: .5rem;
  color: var(--clr-muted);
}
.price-card { text-align: center; }
.price-card.featured { border: 2px solid var(--clr-accent); }
.price-tag { font-size: 2rem; margin: 1rem 0; font-weight: 700; }
.feat-list { list-style: none; margin-top: 1rem; }

/* ----------  TESTIMONIALS ---------- */
.testimonials { background: var(--clr-bg); color: var(--clr-text); }
.testi-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.testimonial { 
  background: var(--clr-card); 
  color: var(--clr-text);
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}
.testimonial p { margin-bottom: .75rem; font-style: italic; color: var(--clr-text); }

/* ----------  CONTACT ---------- */
.contact-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}
.contact-form {
  display: grid;
  gap: 1rem;
}
.contact-form input,
.contact-form textarea {
  padding: 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--clr-muted);
  background: var(--clr-card);
  color: inherit;
}
.contact-grid img { width: 100%; border-radius: 16px; }

/* ----------  FOOTER ---------- */
footer {
  padding: 2rem 0;
  text-align: center;
  font-size: .875rem;
  color: var(--clr-muted);
}

/* Container for injected footer fragment */
#footer-include {
  width: 100%;
  margin: 0 auto;
}
/* === Ultra Modern Dropdown "accordion" styling =============================== */
details {
  border-radius: 16px;
  background: var(--clr-bg);
  border: 1px solid rgba(0, 0, 0, 0.06);
  padding: 0;
  margin-bottom: 1rem;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.02);
  backdrop-filter: blur(10px);
  position: relative;
}

details::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--clr-accent), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

details:hover::before {
  opacity: 1;
}

details:hover {
  border-color: rgba(37, 99, 235, 0.2);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.08), 0 3px 10px rgba(0, 0, 0, 0.05);
  transform: translateY(-1px);
}

details[open] {
  background: var(--clr-bg);
  box-shadow: 0 10px 40px rgba(37, 99, 235, 0.12), 0 4px 15px rgba(0, 0, 0, 0.08);
  border-color: var(--clr-accent);
  transform: translateY(-2px);
}

details summary {
  font-weight: 600;
  cursor: pointer;
  position: relative;
  list-style: none;
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  color: var(--clr-text);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  user-select: none;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.8) 0%, rgba(249, 250, 251, 0.4) 100%);
}

details summary:hover {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.03) 0%, rgba(59, 130, 246, 0.05) 100%);
  color: var(--clr-accent);
  padding-left: 2.25rem;
}

details summary::marker,
details summary::-webkit-details-marker {
  display: none;
}

details summary::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 0;
  background: linear-gradient(180deg, var(--clr-accent), var(--clr-accent-lt));
  border-radius: 0 2px 2px 0;
  transition: height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

details[open] summary::before {
  height: 60%;
}

details summary::after {
  content: '';
  position: absolute;
  right: 1.5rem;
  width: 12px;
  height: 12px;
  border: 2px solid var(--clr-muted);
  border-left: none;
  border-top: none;
  transform: rotate(-45deg);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

details[open] summary::after {
  transform: rotate(45deg);
  border-color: var(--clr-accent);
}

details summary:hover::after {
  border-color: var(--clr-accent);
  transform: rotate(-45deg) scale(1.1);
}

details[open] summary:hover::after {
  transform: rotate(45deg) scale(1.1);
}

details .details-content {
  padding: 0 2rem 2rem 2rem;
  background: linear-gradient(135deg, rgba(249, 250, 251, 0.3) 0%, rgba(255, 255, 255, 0.1) 100%);
  border-top: 1px solid rgba(37, 99, 235, 0.1);
  animation: slideDown 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

details .details-content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 2rem;
  right: 2rem;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.2), transparent);
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
    max-height: 0;
  }
  to {
    opacity: 1;
    transform: translateY(0);
    max-height: 1000px;
  }
}

details p,
details ul {
  margin-top: 1rem;
  color: var(--clr-text);
  line-height: 1.8;
}

details ul.list {
  padding-left: 0;
  list-style: none;
  display: grid;
  gap: 0.75rem;
}

details ul.list li {
  position: relative;
  padding: 0.75rem 1rem 0.75rem 3rem;
  background: rgba(255, 255, 255, 0.4);
  border-radius: 8px;
  border-left: 3px solid transparent;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  list-style: none;
}

details ul.list li:hover {
  background: rgba(37, 99, 235, 0.04);
  border-left-color: var(--clr-accent);
  transform: translateX(4px);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.08);
}

details ul.list li::before {
  content: '◆';
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--clr-accent);
  font-size: 0.7rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

details ul.list li:hover::before {
  transform: translateY(-50%) scale(1.2);
  color: var(--clr-accent-lt);
}

details ul.list li strong {
  color: var(--clr-accent);
  font-weight: 700;
}

details ul.list li a {
  color: var(--clr-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

details ul.list li a:hover {
  border-bottom-color: var(--clr-accent);
}

/* Dark theme support */
[data-theme="dark"] details {
  border-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] details:hover {
  border-color: var(--clr-accent);
}

[data-theme="dark"] details .details-content {
  border-top-color: rgba(255, 255, 255, 0.1);
}

/* === Contact-buttons layout ================================ */
.contact-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1rem;
}
.contact-buttons .btn { flex: 1 1 120px; text-align: center; }



.section { padding: calc(var(--space)*5) 0; }
.pricing-grid,
.testi-grid { gap: 2.5rem; }
@media(max-width:480px) {
  .pricing-grid, .testi-grid { gap: 1.5rem; }
}

@media (max-width: 768px) {
  .card-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .container {
    padding-inline: 1rem;
    max-width: 100%;
  }
  
  .section {
    padding: 3rem 0;
  }
  
  .hero {
    padding: 3rem 0;
  }
  
  .hero-copy h1 {
    font-size: clamp(1.5rem, 5vw, 2rem);
    line-height: 1.2;
  }
  
  .hero-copy p {
    font-size: 1rem;
    line-height: 1.6;
  }
  
  .hero-inner {
    gap: 2rem;
  }
  
  .testi-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
    min-width: 120px;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  h1 {
    font-size: clamp(1.5rem, 5vw, 2rem);
  }
  
  h2 {
    font-size: clamp(1.1rem, 4vw, 1.25rem);
  }
}

@media (max-width: 600px) {
  .hero-img img { 
    width: 90%; 
    margin-inline: auto; 
  }
  
  .btn {
    padding: 0.65rem 1.2rem;
    font-size: 0.85rem;
  }
  
  .badge {
    font-size: 0.7rem;
    padding: 0.3rem 0.6rem;
  }
  
  .exp-list {
    font-size: 0.85rem;
    line-height: 1.5;
  }
  
  .container {
    padding-inline: 0.75rem;
  }
  
  .section {
    padding: 2rem 0;
  }
  
  .card {
    padding: 1.25rem;
  }
  
  .contact-form {
    gap: 0.75rem;
  }
  
  .contact-buttons {
    gap: 0.5rem;
  }
  
  .contact-buttons .btn {
    flex: 1 1 100px;
    font-size: 0.8rem;
  }
}

.site-footer { background: #0f172a; color: #e2e8f0; padding: 3rem 0; font-size: .9rem; }
.footer-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 2rem; }
.footer-grid nav,
.footer-grid .social { display: flex; flex-direction: column; gap: .5rem; }
.footer-grid nav a { color: #fff; }
.footer-grid nav a:hover { color: #facc15; }
.footer-grid .social a img { height: 22px; filter: invert(1); }


/* ----------  BRAND LOGO SIZE ---------- */
.logo {
  height: 48px;
  width: auto;
}
@media (max-width:600px) {
  .logo { height: 38px; }
}

/* ----------  NAVIGATION  ---------- */
.nav {
  background: linear-gradient(90deg, #1e3a8a, #3b82f6);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,.1);
}
.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
.brand {
  color: #fff;
  font-size: 1.5rem;
  font-weight: 700;
  text-decoration: none;
  transition: color .3s;
}
.brand:hover { color: #facc15; }
#burger {
  display: none;
  font-size: 1.5rem;
  background: none;
  border: none;
  color: #fff;
  cursor: pointer;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-links a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 1rem;
  transition: all 0.3s ease;
  border-radius: 5px;
}
.nav-links a:hover {
  background-color: #facc15;
  color: #1e3a8a;
}
@media (max-width:768px) {
  #burger { display: block; }
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: #1e3a8a;
    padding: 1rem;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0,0,0,.1);
  }
  .nav-links.active { display: flex; }
  .nav-links a { padding: 0.75rem; width: 100%; }
}

/* Default styles for desktop menu */
nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
  padding: 0;
}

nav ul li {
  display: inline;
}


/* ----------  TRUST / EXPERIENCE  ---------- */

/* pill badges */
.badge-group { display: flex; flex-wrap: wrap; gap: .6rem; }
.badge {
  padding: .35rem .85rem;
  font-size: .8rem;
  font-weight: 600;
  border-radius: 9999px;
  background: var(--clr-accent-lt);
  color: #fff;
  white-space: nowrap;
}
.badge-ghost {
  background: transparent;
  color: var(--clr-accent);
  border: 2px solid var(--clr-accent);
}

/* experience bullet list */
.cred-grid {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  text-align: center;
  margin-top: 2rem;
}

.badge-group {
  justify-content: center;
}

.exp-list {
  margin: 0 auto;
  max-width: 640px;
}

.exp-list {
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--clr-muted);
  font-size: .95rem;
  line-height: 1.55;
  max-width: 460px;
}
.exp-list li { margin: .25rem 0; }

@media(max-width:800px) {
  .cred-grid { flex-direction: column; align-items: flex-start; }
  .exp-list { max-width: none; margin-top: 1rem; }
}

/* ----------  Footer mobile centring fix  ---------- */
.footer-logo {
  width: 72px;                      /* or whatever looks good */
  justify-self: center;             /* guarantees dead-center */
}

@media (max-width: 640px){
  .footer-grid{
    flex-direction: column;          /* stack logo, nav, icons */
    align-items: center;             /* horizontal centre */
    text-align: center;              /* centre paragraphs & links */
    gap: 1.25rem;                    /* breathing room */
  }
  .footer-grid nav,
  .footer-grid .social{
    flex-direction: row;             /* keep links/icons in a line */
    justify-content: center;
  }
}

/* ---------------- Grammar Explorer Tweaks ---------------- */
#grammar-explorer {
  max-width: 960px;
  margin-inline: auto;
}

#grammar-explorer h1.section-title {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

#grammar-explorer .text-muted {
  font-size: 1.1rem;
  margin-bottom: 2.5rem;
}

#grammar-explorer h2 {
  border-bottom: 2px solid var(--clr-accent);
  padding-bottom: 0.25rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

#grammar-explorer .rule-content ul.list li {
  font-size: 1.1rem;
  line-height: 1.5;
}