:root {
  --navy: #0A0F1E; --navy2: #0D1525; --navy3: #111D30;
  --emerald: #10B981; --emerald-dim: rgba(16,185,129,0.12); --emerald-line: rgba(16,185,129,0.25);
  --cyan: #00D4FF; --cyan-dim: rgba(0,212,255,0.12);
  --amber: #F59E0B; --purple: #8B5CF6;
  --text: #E8EDF5; --muted: #7A90A8;
  --border: rgba(255,255,255,0.07); --border2: rgba(255,255,255,0.13);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'DM Sans',sans-serif;background:var(--navy);color:var(--text);line-height:1.7;overflow-x:hidden}
[data-lang]{display:none}
a{text-decoration:none;color:var(--emerald);transition:0.2s}
a:hover{color:#34D399}

/* NAV */
nav{position:fixed;top:0;left:0;right:0;z-index:200;display:flex;align-items:center;justify-content:space-between;padding:14px 48px;background:rgba(10,15,30,0.92);backdrop-filter:blur(18px);border-bottom:1px solid var(--border)}
.nav-brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.nav-brand-text{font-family:'Cormorant Garamond',serif;font-size:22px;font-weight:700;color:#fff;letter-spacing:2px}
.nav-brand-text em{font-style:normal;color:var(--emerald)}
.nav-right{display:flex;align-items:center;gap:24px}
nav .nav-links{list-style:none;display:flex;gap:28px;align-items:center}
nav .nav-links a{color:var(--muted);font-size:13px;text-decoration:none}
nav .nav-links .btn{color:#fff}
nav .nav-links a.btn{color:#fff}
nav .nav-links a:hover{color:#fff}
.lang-toggle{display:flex;border:1px solid var(--border2);border-radius:5px;overflow:hidden}
.lang-toggle button{background:transparent;border:none;color:var(--muted);padding:6px 12px;font-size:11px;font-weight:500;cursor:pointer;font-family:'DM Sans',sans-serif}
.lang-toggle button.active{background:var(--emerald);color:var(--navy)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 22px;border-radius:6px;font-size:13px;font-weight:500;text-decoration:none;cursor:pointer;border:none;transition:0.2s;font-family:'DM Sans',sans-serif}
.btn-emerald{background:var(--emerald);color:#fff}.btn-emerald:hover{background:#059669;color:#fff}
.btn-outline{border:1px solid var(--border2);color:var(--text);background:transparent}.btn-outline:hover{border-color:rgba(255,255,255,.4);color:#fff}
.btn-ghost{color:var(--emerald);background:var(--emerald-dim)}.btn-ghost:hover{background:rgba(16,185,129,0.2);color:#fff}
.btn-sm{padding:7px 16px;font-size:12px}
.btn-danger{background:rgba(239,68,68,0.15);color:#f87171}.btn-danger:hover{background:rgba(239,68,68,0.25)}

/* HERO */
.hero{min-height:85vh;display:flex;align-items:center;padding:120px 48px 80px;position:relative;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:radial-gradient(ellipse 50% 60% at 70% 40%,rgba(16,185,129,0.05),transparent 65%),radial-gradient(ellipse 40% 50% at 10% 80%,rgba(0,212,255,0.04),transparent 55%)}
.hero-inner{position:relative;z-index:1;max-width:700px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--emerald-line);background:var(--emerald-dim);color:var(--emerald);font-size:10px;letter-spacing:2.5px;font-weight:500;padding:6px 16px;border-radius:20px;margin-bottom:24px}
h1{font-family:'Cormorant Garamond',serif;font-size:clamp(40px,5vw,68px);font-weight:700;line-height:1.08;color:#fff;margin-bottom:20px}
h1 em{font-style:normal;color:var(--emerald)}
.hero-sub{font-size:16px;color:var(--muted);max-width:520px;margin-bottom:36px;font-weight:300;line-height:1.85}

/* SECTIONS */
section{padding:100px 48px}
.section-dark{background:var(--navy2)}
.eyebrow{font-size:10px;color:var(--emerald);letter-spacing:3.5px;font-weight:500;margin-bottom:12px;text-transform:uppercase}
h2{font-family:'Cormorant Garamond',serif;font-size:clamp(28px,3.5vw,46px);font-weight:700;line-height:1.1;color:#fff;margin-bottom:12px}
h2 em{font-style:normal;color:var(--emerald)}
.lead{font-size:15px;color:var(--muted);max-width:500px;margin-bottom:48px;font-weight:300;line-height:1.85}
.section-header{text-align:center;margin-bottom:48px}
.section-header .lead{margin:8px auto 0}

/* COURSE CARDS */
.grid-3{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.card{background:var(--navy2);border:1px solid var(--border);border-radius:12px;padding:28px 24px;transition:0.25s}
.card:hover{border-color:var(--emerald-line);transform:translateY(-3px)}
.card-icon{font-size:32px;margin-bottom:14px}
.card-title{font-family:'Cormorant Garamond',serif;font-size:20px;font-weight:700;color:#fff;margin-bottom:8px}
.card-desc{font-size:13px;color:var(--muted);line-height:1.75;margin-bottom:16px}
.card-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.tag{font-size:9px;letter-spacing:1.5px;padding:3px 10px;border-radius:3px;font-weight:500}
.tag-beginner{background:rgba(16,185,129,0.1);color:var(--emerald)}
.tag-intermediate{background:rgba(245,158,11,0.1);color:var(--amber)}
.tag-advanced{background:rgba(139,92,246,0.1);color:var(--purple)}
.tag-free{background:rgba(0,212,255,0.1);color:var(--cyan)}

/* AI TOOL CARDS */
.tool-card{background:var(--navy2);border:1px solid var(--border);border-radius:10px;padding:20px;transition:0.25s;display:flex;gap:16px;align-items:flex-start}
.tool-card:hover{border-color:var(--emerald-line)}
.tool-logo{width:48px;height:48px;border-radius:10px;background:var(--navy3);display:flex;align-items:center;justify-content:center;flex-shrink:0;overflow:hidden}
.tool-logo img{width:100%;height:100%;object-fit:cover;border-radius:10px}
.tool-name{font-size:15px;font-weight:500;color:#fff;margin-bottom:4px}
.tool-desc{font-size:12px;color:var(--muted);line-height:1.65}
.tool-meta{display:flex;gap:8px;margin-top:8px;flex-wrap:wrap}

/* BLOG CARDS */
.blog-card{background:var(--navy2);border:1px solid var(--border);border-radius:12px;overflow:hidden;transition:0.25s}
.blog-card:hover{border-color:var(--emerald-line);transform:translateY(-3px)}
.blog-cover{width:100%;height:180px;object-fit:cover;background:linear-gradient(135deg,var(--navy2),var(--navy3))}
.blog-body{padding:24px}
.blog-category{font-size:9px;letter-spacing:2px;color:var(--emerald);font-weight:500;margin-bottom:8px}
.blog-title{font-family:'Cormorant Garamond',serif;font-size:20px;font-weight:700;color:#fff;margin-bottom:8px;line-height:1.3}
.blog-excerpt{font-size:13px;color:var(--muted);line-height:1.7}

/* PROGRESS & GAMIFICATION */
.xp-bar{height:8px;background:var(--navy3);border-radius:10px;overflow:hidden;margin:8px 0}
.xp-fill{height:100%;background:linear-gradient(90deg,var(--emerald),var(--cyan));border-radius:10px;transition:width 0.5s}
.streak-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(245,158,11,0.1);border:1px solid rgba(245,158,11,0.2);color:var(--amber);padding:6px 14px;border-radius:20px;font-size:12px;font-weight:500}
.badge-item{display:flex;align-items:center;gap:10px;padding:10px;background:var(--navy3);border-radius:8px;border:1px solid var(--border)}
.badge-icon{font-size:24px}
.level-circle{width:64px;height:64px;border-radius:50%;border:3px solid var(--emerald);display:flex;align-items:center;justify-content:center;font-family:'Cormorant Garamond',serif;font-size:24px;font-weight:700;color:var(--emerald);flex-shrink:0}

/* LESSON */
.lesson-content{max-width:700px;margin:0 auto;font-size:15px;line-height:1.9;color:var(--text)}
.lesson-content h3{font-family:'Cormorant Garamond',serif;font-size:24px;color:#fff;margin:32px 0 12px}
.lesson-content p{margin-bottom:16px}
.lesson-content ul,.lesson-content ol{margin:0 0 16px 20px}
.quiz-option{display:block;width:100%;text-align:left;padding:14px 20px;background:var(--navy2);border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:14px;cursor:pointer;transition:0.2s;margin-bottom:8px;font-family:'DM Sans',sans-serif}
.quiz-option:hover{border-color:var(--emerald-line);background:var(--navy3)}
.quiz-option.correct{border-color:var(--emerald);background:var(--emerald-dim);color:var(--emerald)}
.quiz-option.wrong{border-color:#EF4444;background:rgba(239,68,68,0.08);color:#f87171}
.xp-popup{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background:var(--navy2);border:2px solid var(--emerald);border-radius:16px;padding:40px;text-align:center;z-index:999;box-shadow:0 20px 60px rgba(0,0,0,0.5)}

/* FILTERS */
.filter-bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:32px}
.filter-btn{padding:7px 16px;border-radius:20px;font-size:12px;border:1px solid var(--border);color:var(--muted);background:transparent;cursor:pointer;transition:0.2s;font-family:'DM Sans',sans-serif}
.filter-btn:hover,.filter-btn.active{border-color:var(--emerald);color:var(--emerald);background:var(--emerald-dim)}
.search-box{background:var(--navy2);border:1px solid var(--border2);border-radius:8px;padding:10px 16px;color:var(--text);font-size:14px;font-family:'DM Sans',sans-serif;width:100%;max-width:360px;outline:none;transition:border-color 0.2s}
.search-box:focus{border-color:var(--emerald)}

/* DASHBOARD */
.dash-grid{display:grid;grid-template-columns:280px 1fr;gap:32px;align-items:start}
.dash-profile{background:var(--navy2);border:1px solid var(--border);border-radius:14px;padding:32px 24px;text-align:center}
.dash-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:20px 0}
.dash-stat{background:var(--navy3);border-radius:8px;padding:12px;text-align:center}
.dash-stat-n{font-family:'Cormorant Garamond',serif;font-size:24px;font-weight:700;color:var(--emerald)}
.dash-stat-l{font-size:10px;color:var(--muted);letter-spacing:1px;margin-top:2px}

/* ADMIN */
.admin-layout{display:flex;min-height:100vh;padding-top:62px}
.admin-sidebar{width:220px;background:var(--navy2);border-right:1px solid var(--border);padding:20px 0;flex-shrink:0}
.admin-sidebar a{display:flex;align-items:center;gap:10px;padding:10px 20px;color:var(--muted);font-size:13px;transition:0.2s}
.admin-sidebar a:hover,.admin-sidebar a.active{color:var(--emerald);background:var(--emerald-dim);border-right:2px solid var(--emerald)}
.admin-content{flex:1;padding:28px}
.admin-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}
.admin-header h2{font-family:'DM Sans',sans-serif;font-size:1.4rem;margin-bottom:0}
.admin-card{background:var(--navy2);border-radius:12px;border:1px solid var(--border);padding:24px;margin-bottom:20px}
.stat-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:28px}
.stat-card-admin{background:var(--navy2);border-radius:12px;border:1px solid var(--border);padding:20px}
.stat-number{font-family:'Cormorant Garamond',serif;font-size:2rem;font-weight:700;color:var(--emerald)}
.stat-label{font-size:11px;color:var(--muted);margin-top:4px}
.admin-table{width:100%;border-collapse:collapse}
.admin-table th{text-align:left;padding:10px 14px;font-size:10px;font-weight:500;color:var(--muted);letter-spacing:1.5px;text-transform:uppercase;border-bottom:1px solid var(--border)}
.admin-table td{padding:12px 14px;font-size:13px;border-bottom:1px solid rgba(255,255,255,0.03)}
.admin-table tr:hover{background:rgba(16,185,129,0.02)}
.badge-status{padding:3px 10px;border-radius:20px;font-size:9px;font-weight:500;letter-spacing:1px}
.badge-active{background:var(--emerald-dim);color:var(--emerald)}
.badge-inactive{background:rgba(239,68,68,0.15);color:#f87171}
.form-group{margin-bottom:18px}
.form-group label{display:block;font-size:11px;color:var(--muted);letter-spacing:1.5px;margin-bottom:6px;font-weight:500}
.form-control{width:100%;padding:10px 14px;border-radius:6px;background:rgba(255,255,255,0.05);border:1px solid var(--border2);color:var(--text);font-family:'DM Sans',sans-serif;font-size:14px;outline:none;transition:border-color 0.2s}
.form-control:focus{border-color:var(--emerald)}
textarea.form-control{min-height:120px;resize:vertical}
select.form-control{background:var(--navy2);cursor:pointer}

/* FOOTER */
footer{padding:48px;border-top:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px}
footer p{font-size:12px;color:var(--muted)}
.footer-links{display:flex;gap:20px}
.footer-links a{font-size:12px;color:var(--muted)}

/* FLASH */
.flash-container{position:fixed;top:76px;right:24px;z-index:9999}
.flash{padding:12px 20px;border-radius:6px;font-size:13px;font-weight:500;margin-bottom:8px;animation:slideIn 0.3s}
.flash-success{background:var(--emerald-dim);border:1px solid var(--emerald-line);color:var(--emerald)}
.flash-error{background:rgba(239,68,68,0.08);border:1px solid rgba(239,68,68,0.25);color:#f87171}
@keyframes slideIn{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}

/* AUTH */
.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding-top:62px}
.auth-box{width:100%;max-width:420px;padding:40px;background:var(--navy2);border-radius:14px;border:1px solid var(--border)}
.auth-box h2{text-align:center;margin-bottom:28px}

/* RESPONSIVE */
@media(max-width:960px){
  nav{padding:14px 20px}
  nav .nav-links{display:none}
  .hero,section{padding:80px 20px}
  .grid-3,.grid-4{grid-template-columns:1fr}
  .dash-grid{grid-template-columns:1fr}
  .admin-sidebar{display:none}
  .admin-content{padding:16px}
  footer{flex-direction:column;text-align:center}
}