/* ===== Language Town — Base ===== */
:root{
  --purple-900:#1E0A47;
  --purple-800:#2A1362;
  --purple-700:#3A1B85;
  --purple-600:#4E2AAE;
  --gold-500:#D8A566;
  --gold-400:#E8C58C;
  --cream:#FBF8F3;
  --ink:#221B35;
  --gray-600:#6B6478;
  --gray-200:#E7E2F0;
  --radius:16px;
  --shadow:0 10px 30px rgba(30,10,71,0.12);
  --container:1180px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Be Vietnam Pro",system-ui,sans-serif;
  color:var(--ink);
  background:var(--cream);
  line-height:1.6;
}
h1,h2,h3,h4{font-family:"Poppins",sans-serif;line-height:1.25}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%;display:block}
button,input,select,textarea{font-family:inherit;font-size:1rem}

.container{
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}

.section{padding:96px 0}
.section-alt{background:#F3EEFB}

.section-tag{
  display:inline-block;
  color:var(--purple-700);
  font-weight:700;
  letter-spacing:.08em;
  text-transform:uppercase;
  font-size:.8rem;
  margin-bottom:12px;
}

.section-head{max-width:640px;margin:0 auto 56px;text-align:center}
.section-head h2{font-size:2.1rem;color:var(--purple-900);margin-bottom:12px}
.section-head p{color:var(--gray-600)}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 24px;border-radius:999px;font-weight:600;
  border:2px solid transparent;transition:all .2s ease;cursor:pointer;
  white-space:nowrap;
}
.btn-primary{background:var(--purple-700);color:#fff}
.btn-primary:hover{background:var(--purple-800)}
.btn-outline{border-color:var(--purple-700);color:var(--purple-700)}
.btn-outline:hover{background:var(--purple-700);color:#fff}
.hero .btn-outline{border-color:#fff;color:#fff}
.hero .btn-outline:hover{background:#fff;color:var(--purple-800)}
.btn-light{background:#fff;color:var(--purple-800)}
.btn-light:hover{background:var(--gold-400)}
.btn-lg{padding:16px 32px;font-size:1.05rem}
.btn-block{width:100%}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(251,248,243,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--gray-200);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 24px;gap:16px;
  max-width:1400px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-icon{width:42px;height:42px;flex-shrink:0}
.brand-text{display:flex;flex-direction:column;line-height:1.2;white-space:nowrap}
.brand-text strong{color:var(--purple-800);font-family:"Poppins",sans-serif;font-size:1.05rem;letter-spacing:.02em;white-space:nowrap}
.brand-text small{color:var(--gold-500);font-weight:600;font-size:.68rem;letter-spacing:.04em;white-space:nowrap}

.nav{display:flex;gap:16px;flex:1;justify-content:center;min-width:0}
.nav a{font-weight:600;color:var(--ink);font-size:.9rem;white-space:nowrap;transition:color .2s}
.nav a:hover{color:var(--purple-700)}

.header-actions{display:flex;align-items:center;gap:14px;flex-shrink:0}
.header-icons{display:flex;align-items:center;gap:8px}
.icon-btn{
  display:flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:50%;
  background:#F1E9FB;color:var(--purple-700);
  font-size:1.05rem;transition:background .2s ease,transform .2s ease;
}
.icon-btn:hover{background:var(--purple-700);color:#fff;transform:translateY(-2px)}

.lang-switch{
  display:flex;align-items:center;background:#F1E9FB;
  border-radius:999px;padding:3px;gap:2px;flex-shrink:0;
}
.lang-btn{
  display:inline-flex;align-items:center;gap:5px;
  border:none;background:transparent;padding:6px 13px;border-radius:999px;
  font-weight:700;font-size:.78rem;color:var(--purple-700);cursor:pointer;
  transition:background .2s ease,color .2s ease;
}
.flag-icon{width:18px;height:12px;border-radius:2px;object-fit:cover;flex-shrink:0}
.lang-btn.active{background:var(--purple-700);color:#fff}
.lang-btn:not(.active):hover{background:rgba(58,27,133,0.12)}
.icon-btn img{width:20px;height:20px}
.icon-btn-zalo{background:#fff;border:1px solid var(--gray-200)}
.icon-btn-zalo:hover{background:var(--purple-700);border-color:var(--purple-700);transform:translateY(-2px)}
.portal-login-icon{flex-shrink:0}

.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px;flex-shrink:0}

@media (max-width:1360px){
  .nav{display:none}
  .header-icons{display:none}
  .nav-toggle{display:flex}
}
.nav-toggle span{width:24px;height:2px;background:var(--purple-800);border-radius:2px}

/* ===== Hero ===== */
.hero{
  background:linear-gradient(135deg,var(--purple-900),var(--purple-700));
  color:#fff;
  padding:88px 0;
  overflow:hidden;
}
.hero-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:56px;align-items:center}
.eyebrow{
  display:inline-block;color:var(--gold-400);font-weight:700;
  letter-spacing:.08em;text-transform:uppercase;font-size:.8rem;margin-bottom:16px;
}
.hero-content h1{font-size:2.8rem;margin-bottom:20px}
.hero-content h1 span{color:var(--gold-400)}
.hero-content p{color:#DCD3F2;max-width:520px;margin-bottom:32px;font-size:1.05rem}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:48px}

.hero-stats{display:grid;grid-template-columns:repeat(4,auto);gap:32px}
.hero-stats div{display:flex;flex-direction:column}
.hero-stats strong{font-family:"Poppins",sans-serif;font-size:1.6rem;color:var(--gold-400)}
.hero-stats span{font-size:.82rem;color:#C9BEE8}

.hero-media{display:flex;justify-content:center}
.hero-card{
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.18);
  border-radius:var(--radius);
  padding:48px 32px;text-align:center;backdrop-filter:blur(6px);
  max-width:340px;
  transition:transform .3s ease,background .3s ease;
}
.hero-card:hover{transform:translateY(-8px) scale(1.02);background:rgba(255,255,255,.14)}
.hero-logo{
  width:90px;margin:0 auto 20px;background:#fff;border-radius:18px;padding:14px;
  transition:transform .3s ease;
}
.hero-card:hover .hero-logo{transform:scale(1.06)}
.hero-card p{color:#fff;font-weight:600}
.hero-card p span{display:block;color:var(--gold-400);font-weight:500;font-size:.9rem;margin-top:6px}

/* ===== About ===== */
.about-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:64px;align-items:center}
.about-text h2{font-size:2.1rem;color:var(--purple-900);margin-bottom:18px}
.about-text p{color:var(--gray-600);margin-bottom:16px}
.about-list{margin-top:20px;display:flex;flex-direction:column;gap:12px}
.about-list li{
  padding-left:28px;position:relative;color:var(--ink);font-weight:500;
}
.about-list li::before{
  content:"✓";position:absolute;left:0;color:var(--purple-700);font-weight:700;
}
.about-media{display:flex;flex-direction:column;gap:20px}
.about-box{
  border-radius:var(--radius);padding:28px;color:#fff;box-shadow:var(--shadow);
  transition:transform .25s ease,box-shadow .25s ease;
}
.about-box:hover{transform:translateY(-6px);box-shadow:0 16px 34px rgba(30,10,71,0.2)}
.about-box h3{margin-bottom:10px;font-size:1.15rem}
.about-box p{font-size:.95rem;opacity:.92}
.box-1{background:linear-gradient(135deg,var(--purple-700),var(--purple-600))}
.box-2{background:linear-gradient(135deg,var(--gold-500),#C88A45)}

/* ===== Courses ===== */
.course-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:28px;
}
.course-card{
  background:#fff;border-radius:var(--radius);padding:32px 28px;
  box-shadow:var(--shadow);transition:transform .25s ease;
  border:1px solid var(--gray-200);
}
.course-card:hover{transform:translateY(-6px)}
.course-icon{font-size:2.2rem;margin-bottom:14px}
.course-age{
  display:inline-block;background:#F1E9FB;color:var(--purple-700);
  font-weight:700;font-size:.75rem;padding:4px 12px;border-radius:999px;margin-bottom:12px;
}
.course-card h3{color:var(--purple-900);font-size:1.2rem;margin-bottom:10px}
.course-card p{color:var(--gray-600);font-size:.95rem}

/* ===== Features ===== */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.feature-item{text-align:center;padding:0 12px}
.feature-icon{
  width:64px;height:64px;border-radius:50%;background:var(--purple-900);
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:1.6rem;margin:0 auto 18px;
  transition:transform .25s ease,background .25s ease;
}
.feature-item:hover .feature-icon{transform:translateY(-6px) scale(1.06);background:var(--purple-700)}
.feature-item h3{color:var(--purple-900);font-size:1.1rem;margin-bottom:8px}
.feature-item p{color:var(--gray-600);font-size:.95rem}

/* ===== Teachers ===== */
.teacher-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.teacher-card{
  background:#fff;border-radius:var(--radius);padding:28px 20px;text-align:center;
  box-shadow:var(--shadow);border:1px solid var(--gray-200);
  transition:transform .25s ease,box-shadow .25s ease;
}
.teacher-card:hover{transform:translateY(-6px);box-shadow:0 16px 34px rgba(30,10,71,0.18)}
.teacher-avatar{
  width:72px;height:72px;border-radius:50%;margin:0 auto 16px;
  background:linear-gradient(135deg,var(--purple-700),var(--gold-500));
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.2rem;
}
.teacher-card h3{font-size:1rem;color:var(--purple-900);margin-bottom:4px}
.teacher-card span{color:var(--gray-600);font-size:.85rem}
.note-placeholder{text-align:center;color:var(--gray-600);font-size:.85rem;font-style:italic;margin-top:28px}

/* ===== Testimonials ===== */
.testimonial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.testimonial-card{
  background:#fff;border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);
  border:1px solid var(--gray-200);display:flex;flex-direction:column;justify-content:space-between;
  transition:transform .25s ease,box-shadow .25s ease;
}
.testimonial-card:hover{transform:translateY(-6px);box-shadow:0 16px 34px rgba(30,10,71,0.18)}
.testimonial-card p{color:var(--ink);font-size:.95rem;margin-bottom:20px;font-style:italic}
.testimonial-author{display:flex;align-items:center;gap:12px}
.testimonial-avatar{
  width:42px;height:42px;border-radius:50%;background:var(--purple-800);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;
}
.testimonial-author strong{display:block;font-size:.9rem;color:var(--purple-900)}
.testimonial-author span{font-size:.8rem;color:var(--gray-600)}

/* ===== CTA banner ===== */
.cta-banner{background:linear-gradient(135deg,var(--gold-500),#C88A45);padding:56px 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{color:var(--purple-900);font-size:1.6rem;margin-bottom:8px}
.cta-inner p{color:#4A3212}

/* ===== Contact ===== */
.contact-inner{display:grid;grid-template-columns:1fr 1fr;gap:64px}
.contact-info h2{font-size:2rem;color:var(--purple-900);margin-bottom:14px}
.contact-info p{color:var(--gray-600);margin-bottom:28px}
.contact-list{display:flex;flex-direction:column;gap:20px;margin-bottom:28px}
.contact-list li{display:flex;align-items:flex-start;gap:14px}
.contact-icon{font-size:1.4rem}
.zalo-inline-icon{width:24px;height:24px}
.contact-list strong{display:block;color:var(--purple-900);font-size:.85rem;margin-bottom:2px}
.contact-list a{color:var(--purple-700);font-weight:600}
.pending{color:var(--gray-600);font-style:italic}
.social-row{display:flex;gap:14px}
.social-row a{
  padding:8px 18px;border-radius:999px;background:#F1E9FB;color:var(--purple-700);
  font-weight:600;font-size:.85rem;
}

.contact-form{
  background:#fff;border-radius:var(--radius);padding:36px;box-shadow:var(--shadow);
  border:1px solid var(--gray-200);
}
.form-centered{max-width:560px;margin:0 auto}
.contact-form h3{color:var(--purple-900);margin-bottom:20px}
.form-row{margin-bottom:16px}
.form-row label{display:block;font-weight:600;font-size:.88rem;margin-bottom:6px;color:var(--ink)}
.form-row input,.form-row select,.form-row textarea{
  width:100%;padding:11px 14px;border-radius:10px;border:1px solid var(--gray-200);
  background:#FBF8F3;
}
.form-row input:focus,.form-row select:focus,.form-row textarea:focus{
  outline:none;border-color:var(--purple-600);
}
.form-note{margin-top:12px;font-size:.9rem;color:var(--purple-700);font-weight:600;min-height:1.2em}

/* ===== Footer ===== */
.site-footer{background:var(--purple-900);color:#DCD3F2;padding-top:56px}
.footer-inner{display:grid;grid-template-columns:1fr 2fr;gap:48px;padding-bottom:40px}
.footer-brand{display:flex;align-items:center;gap:12px}
.footer-logo{width:46px}
.footer-brand strong{display:block;color:#fff;font-family:"Poppins",sans-serif}
.footer-brand span{font-size:.8rem;color:var(--gold-400)}
.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.footer-cols h4{color:#fff;margin-bottom:14px;font-size:.95rem}
.footer-cols a,.footer-cols span{display:flex;align-items:flex-start;gap:8px;color:#C9BEE8;font-size:.9rem;margin-bottom:10px;line-height:1.4}
.footer-cols a:hover{color:var(--gold-400)}
.footer-cols a:hover span{color:var(--gold-400)}
.footer-cols a > img{flex-shrink:0;margin-top:2px}
.footer-cols a{overflow-wrap:normal;word-break:normal}
.footer-zalo-icon{width:16px;height:16px}
.footer-icon{flex-shrink:0;font-size:.85rem;line-height:1.4}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;text-align:center}
.footer-bottom p{font-size:.85rem;color:#A79BC9}
.footer-bottom-inner{display:flex;align-items:center;justify-content:center;gap:20px;flex-wrap:wrap}
.footer-portal-link{font-size:.8rem;color:#7A6FA0}
.footer-portal-link:hover{color:var(--gold-400)}

/* ===== Responsive ===== */
@media (max-width:960px){
  .hero-inner,.about-inner,.contact-inner{grid-template-columns:1fr}
  .course-grid,.feature-grid,.teacher-grid,.testimonial-grid{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:repeat(3,1fr)}
  .hero-media{order:-1}
}

@media (max-width:640px){
  .section{padding:64px 0}
  .hero{padding:64px 0}
  .hero-content h1{font-size:2rem}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .course-grid,.feature-grid,.teacher-grid,.testimonial-grid{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:1fr}
  .cta-inner{flex-direction:column;text-align:center}
  .header-actions .btn{padding:10px 16px;font-size:.9rem}
}

/* Mobile nav open state */
.nav.open{
  display:flex;flex-direction:column;position:absolute;top:100%;left:0;right:0;
  background:var(--cream);padding:20px 24px;gap:16px;box-shadow:var(--shadow);
}