:root{
  --bg:#f6f8fb; --card:#fff; --text:#1f2937; --muted:#6b7280;
  --brand:#58cc02; --border:#e5e7eb;
}
*{box-sizing:border-box}
body{margin:0;font-family:Nunito,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text)}
.container{max-width:1100px;margin:0 auto;padding:18px}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0}
.brand{font-weight:800}
.top-actions{display:flex;gap:12px;align-items:center}
.pill{padding:6px 10px;border-radius:999px;background:#eef8e6;color:#176a00;font-weight:800;font-size:12px}
.link{text-decoration:none;font-weight:800}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:18px;box-shadow:0 6px 18px rgba(15,23,42,.05)}
h1{margin:0 0 10px;font-size:26px}
label{display:block;margin:10px 0 6px;font-weight:800}
input{width:100%;padding:12px;border:1px solid var(--border);border-radius:12px}
.btn{display:inline-block;margin-top:14px;background:var(--brand);color:#fff;font-weight:900;padding:12px 14px;border-radius:14px;text-decoration:none;border:none;cursor:pointer}
.muted{color:var(--muted)}
.alert{background:#fff3cd;border:1px solid #ffe69c;color:#7a5b00;padding:10px;border-radius:12px;margin:10px 0}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
@media (max-width:820px){.grid{grid-template-columns:1fr}}
.list{margin:0;padding-left:18px}

.pagehead{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin:10px 0 14px}
.small{font-size:12px}
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
@media (max-width:980px){.cards{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:640px){.cards{grid-template-columns:1fr}}
.course-card{background:#fff;border:1px solid var(--border);border-radius:16px;overflow:hidden;box-shadow:0 6px 18px rgba(15,23,42,.05)}
.thumb{height:140px;background-size:cover;background-position:center}
.course-body{padding:14px}
.course-title{font-weight:900;margin-bottom:6px}
.price{margin:10px 0;font-weight:900}
.btn2{display:inline-block;padding:10px 12px;border-radius:12px;border:1px solid var(--border);text-decoration:none;font-weight:900;background:#fff}
.btn2:hover{background:#f3f4f6}
.bread{margin:10px 0}
.course-hero{display:grid;grid-template-columns:260px 1fr;gap:14px}
@media (max-width:820px){.course-hero{grid-template-columns:1fr}}
.course-hero-thumb{height:200px;border-radius:16px;background-size:cover;background-position:center;border:1px solid var(--border)}
.course-hero-body{background:#fff;border:1px solid var(--border);border-radius:16px;padding:16px;box-shadow:0 6px 18px rgba(15,23,42,.05)}
.row{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}
.ok{margin-top:10px;font-weight:900;color:#176a00}
.lesson-list{display:flex;flex-direction:column;gap:10px;margin-top:10px}
.lesson-item{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px;border:1px solid var(--border);border-radius:14px;background:#fff}
.lesson-title{font-weight:900}
.lesson-actions{white-space:nowrap}
textarea{width:100%;padding:12px;border:1px solid var(--border);border-radius:12px;font-family:inherit}
.table{width:100%;border-collapse:collapse}
.table th,.table td{padding:10px;border-bottom:1px solid var(--border);text-align:left}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:820px){.grid2{grid-template-columns:1fr}}
.content p{line-height:1.6}


/* Marketing */
body.marketing{background:linear-gradient(180deg,#f6f8fb 0%, #ffffff 60%);font-family:'Nunito',system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}
.m-nav{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}
.m-brand{font-weight:900}
.m-links{display:flex;gap:14px;align-items:center}
.m-links a{text-decoration:none;color:var(--text);font-weight:800}
.m-cta{padding:10px 12px;border-radius:12px;border:1px solid var(--border)}
.m-wrap{max-width:1100px;margin:0 auto;padding:18px}
.m-footer{border-top:1px solid var(--border);background:#fff;padding:18px;margin-top:30px}
.hero{display:grid;grid-template-columns:1.3fr .7fr;gap:14px;margin-top:12px}
@media(max-width:820px){.hero{grid-template-columns:1fr}}
.hero-card{background:#fff;border:1px solid var(--border);border-radius:20px;padding:22px;box-shadow:0 10px 26px rgba(15,23,42,.06)}
.hero h1{font-size:40px;line-height:1.05;margin:10px 0 10px}
.green{color:var(--brand)}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px}
.hero-badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.hero-side{display:grid;gap:14px}
.stat-card{background:#fff;border:1px solid var(--border);border-radius:20px;padding:18px;box-shadow:0 10px 26px rgba(15,23,42,.06)}
.stat-num{font-size:32px;font-weight:900}
.feature-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:14px}
@media(max-width:980px){.feature-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:520px){.feature-grid{grid-template-columns:1fr}}
.fcard{background:#fff;border:1px solid var(--border);border-radius:20px;padding:18px;box-shadow:0 10px 26px rgba(15,23,42,.06)}
.fic{width:44px;height:44px;border-radius:14px;background:#eef8e6;color:#176a00;display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:10px}

/* Shell sidebar (Vuexy-ish light) */
.shell{display:grid;grid-template-columns:270px 1fr;min-height:calc(100vh - 58px)}
@media(max-width:980px){.shell{grid-template-columns:1fr}.sidebar{display:none}}
.sidebar{background:#fff;border-right:1px solid var(--border);padding:14px;position:sticky;top:58px;height:calc(100vh - 58px);overflow:auto}
.main{padding:18px;max-width:1100px}
.sb-user{display:flex;gap:10px;align-items:center;padding:10px;border:1px solid var(--border);border-radius:16px;margin-bottom:12px}
.avatar{width:42px;height:42px;border-radius:14px;background:#eef8e6;color:#176a00;display:flex;align-items:center;justify-content:center;font-weight:900}
.sb-name{font-weight:900}
.sb-link{display:flex;gap:10px;align-items:center;padding:10px 10px;border-radius:14px;text-decoration:none;color:var(--text);font-weight:800;margin:4px 0}
.sb-link:hover{background:#f3f4f6}
.sb-link.active{background:#eef8e6;color:#176a00}
.sb-sep{height:1px;background:var(--border);margin:10px 0}
.sb-title{font-size:12px;color:var(--muted);font-weight:900;text-transform:uppercase;margin-bottom:6px}

/* Practice */
.practice{display:grid;grid-template-columns:360px 1fr;gap:14px}
@media(max-width:980px){.practice{grid-template-columns:1fr}}
.select{width:100%;padding:12px;border:1px solid var(--border);border-radius:12px;background:#fff}
.practice-chat{border:1px solid var(--border);border-radius:16px;background:#fff;padding:12px}
.chatbox{height:320px;overflow:auto;border:1px solid var(--border);border-radius:14px;padding:10px;background:#fbfbfc}
.bubble{max-width:82%;padding:10px 12px;border-radius:14px;margin:10px 0;border:1px solid var(--border)}
.bubble.me{margin-left:auto;background:#eef8e6}
.bubble.ai{background:#fff}
.b-sender{font-size:12px;font-weight:900;color:var(--muted);margin-bottom:4px}
.msgform{display:flex;gap:10px;margin-top:10px}
.msgform input{flex:1}

/* Community */
.posts{margin-top:12px;display:flex;flex-direction:column;gap:10px}
.post{border:1px solid var(--border);border-radius:16px;padding:12px;background:#fff}
.post-head{display:flex;justify-content:space-between;gap:10px;margin-bottom:6px}

/* Pricing cards */
.pricing{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
@media(max-width:980px){.pricing{grid-template-columns:1fr}}
.price-card{background:#fff;border:1px solid var(--border);border-radius:20px;padding:18px;box-shadow:0 10px 26px rgba(15,23,42,.06)}
.price-card.featured{border-color:#c5f2a8}
.price-num{font-size:28px;font-weight:900;margin:8px 0}
.price-card ul{margin:10px 0 0;padding-left:18px}


/* ===== FRONT_UI POLISH (Duolingo-inspired) ===== */
.lead{font-size:18px;line-height:1.65}
.hero2{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:center;margin-top:14px}
@media(max-width:980px){.hero2{grid-template-columns:1fr}}
.hero2-left{padding:6px}
.hero2-right{position:relative}
.hero-illustration{background:#fff;border:1px solid var(--border);border-radius:22px;padding:14px;box-shadow:0 10px 26px rgba(15,23,42,.06)}
.floating-cards{display:grid;gap:10px;position:absolute;right:-10px;bottom:-12px;width:min(320px, 92%)}
@media(max-width:980px){.floating-cards{position:static;margin-top:12px;width:100%}}
.float-card{display:flex;gap:10px;align-items:center;background:#fff;border:1px solid var(--border);border-radius:18px;padding:12px;box-shadow:0 10px 26px rgba(15,23,42,.06)}
.fc-ic{width:42px;height:42px;border-radius:14px;background:#eef8e6;color:#176a00;display:flex;align-items:center;justify-content:center;font-size:18px}
.fc-title{font-weight:900}
.trustrow{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.mini-metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-top:14px}
@media(max-width:980px){.mini-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}}
.metric{background:#fff;border:1px solid var(--border);border-radius:18px;padding:12px;box-shadow:0 10px 26px rgba(15,23,42,.06)}
.metric-num{font-size:20px;font-weight:900}
.metric-label{font-size:12px;color:var(--muted);font-weight:800;text-transform:uppercase;letter-spacing:.04em}

.section{margin-top:26px}
.section.alt{background:linear-gradient(180deg,#ffffff 0%, #f6f8fb 100%);border:1px solid var(--border);border-radius:24px;padding:18px}
.sec-head{display:flex;justify-content:space-between;gap:14px;align-items:flex-end;margin-bottom:14px}
.sec-head h2{margin:0}
.sec-head p{margin:0;max-width:620px}
@media(max-width:820px){.sec-head{flex-direction:column;align-items:flex-start}}

.feature-grid2{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
@media(max-width:980px){.feature-grid2{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:520px){.feature-grid2{grid-template-columns:1fr}}
.fcard2{background:#fff;border:1px solid var(--border);border-radius:22px;padding:18px;box-shadow:0 10px 26px rgba(15,23,42,.06)}
.fcard2 h3{margin:10px 0 6px}
.fcard2 .small{margin-top:10px}

.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:10px}
@media(max-width:980px){.steps{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:520px){.steps{grid-template-columns:1fr}}
.step{background:#fff;border:1px solid var(--border);border-radius:22px;padding:16px;box-shadow:0 10px 26px rgba(15,23,42,.06)}
.step-num{width:38px;height:38px;border-radius:14px;background:#eef8e6;color:#176a00;display:flex;align-items:center;justify-content:center;font-weight:900}

.mockshots{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:14px}
@media(max-width:980px){.mockshots{grid-template-columns:1fr}}
.mock{background:#fff;border:1px solid var(--border);border-radius:22px;overflow:hidden;box-shadow:0 10px 26px rgba(15,23,42,.06)}
.mock-top{padding:10px;border-bottom:1px solid var(--border);display:flex;gap:6px;background:#fbfbfc}
.dot{width:10px;height:10px;border-radius:50%}
.dot.r{background:#ff6b6b}.dot.y{background:#ffd93d}.dot.g{background:#6bcb77}
.mock-body{padding:14px}
.mock-title{font-weight:900;margin-bottom:10px}
.mock-row{height:12px;border-radius:10px;background:#e5e7eb;margin:10px 0}
.mock-row.w70{width:70%}.mock-row.w85{width:85%}.mock-row.w60{width:60%}.mock-row.w90{width:90%}.mock-row.w65{width:65%}
.mock-chip{display:inline-flex;gap:8px;align-items:center;margin-top:6px;padding:10px 12px;border-radius:999px;border:1px solid var(--border);background:#eef8e6;color:#176a00;font-weight:900}

.split{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
@media(max-width:980px){.split{grid-template-columns:1fr}}
.split-card{background:#fff;border:1px solid var(--border);border-radius:22px;padding:18px;box-shadow:0 10px 26px rgba(15,23,42,.06)}
.split-card h3{margin:0 0 10px}
.split-card i{color:#176a00}

.cta2{margin-top:26px}
.cta2-card{display:flex;justify-content:space-between;gap:14px;align-items:center;background:#fff;border:1px solid var(--border);border-radius:24px;padding:18px;box-shadow:0 10px 26px rgba(15,23,42,.06)}
@media(max-width:820px){.cta2-card{flex-direction:column;align-items:flex-start}}
.cta2-actions{display:flex;gap:12px;flex-wrap:wrap}

.pagehead2{display:flex;justify-content:space-between;gap:14px;align-items:flex-end;margin-top:12px}
@media(max-width:820px){.pagehead2{flex-direction:column;align-items:flex-start}}
.pagehead2-side{display:flex;gap:10px;flex-wrap:wrap}
.ph-card{display:flex;gap:10px;align-items:center;background:#fff;border:1px solid var(--border);border-radius:18px;padding:12px;box-shadow:0 10px 26px rgba(15,23,42,.06)}
.ph-ic{width:42px;height:42px;border-radius:14px;background:#eef8e6;color:#176a00;display:flex;align-items:center;justify-content:center;font-size:18px}
.ph-title{font-weight:900}

.note{display:flex;gap:10px;align-items:flex-start;margin-top:14px;background:#fff;border:1px solid var(--border);border-radius:18px;padding:12px}
.note-ic{width:36px;height:36px;border-radius:14px;background:#eef8e6;color:#176a00;display:flex;align-items:center;justify-content:center;font-size:16px;flex:0 0 auto}