:root{
  --ink:#0a0a12;--ink2:#2d2d3f;--ink3:#6b7280;
  --violet:#6c47ff;--violet2:#8b67ff;--violet-pale:#f0edff;--violet-border:#d4cbff;
  --emerald:#10b981;--amber:#f59e0b;--rose:#f43f5e;--sky:#0ea5e9;
  --white:#ffffff;--bg:#f8f7ff;--bg2:#f0eeff;--card:#fff;
  --border:#e8e4f4;--border2:#d4cbff;
  --sidebar-bg:#0a0a12;--sidebar-w:300px;
  --radius:16px;--radius-sm:10px;
  --shadow:0 4px 24px rgba(108,71,255,.10);
  --shadow-lg:0 12px 48px rgba(108,71,255,.16);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:'DM Sans',sans-serif;font-size:15px;line-height:1.65;min-height:100vh;overflow-x:hidden}
h1,h2,h3,h4,h5{font-family:'Sora',sans-serif;line-height:1.2}

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar{width:5px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--violet-border);border-radius:999px}

/* ─── LOGIN ─── */
.login-screen{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#f0edff 0%,#fff 60%,#f0edff 100%);padding:1.5rem;position:relative;overflow:hidden}
.login-screen::before{content:'';position:absolute;width:600px;height:600px;border-radius:50%;background:radial-gradient(circle,rgba(108,71,255,.08) 0%,transparent 70%);top:-200px;left:-200px;pointer-events:none}
.login-screen::after{content:'';position:absolute;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(16,185,129,.06) 0%,transparent 70%);bottom:-100px;right:-100px;pointer-events:none}
.login-card{background:#fff;border-radius:28px;padding:3rem 3.5rem;max-width:440px;width:100%;border:1.5px solid var(--violet-border);box-shadow:var(--shadow-lg);position:relative;z-index:1;animation:slideUp .5s ease}
@keyframes slideUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
.login-logo{font-family:'Sora',sans-serif;font-size:20px;font-weight:700;color:var(--ink);margin-bottom:2rem;text-align:center;display:flex;align-items:center;justify-content:center;gap:8px}
.logo-badge{background:var(--violet);color:#fff;padding:4px 10px;border-radius:8px;font-size:13px;font-weight:700}
.login-card h2{font-size:26px;font-weight:700;color:var(--ink);margin-bottom:.4rem;text-align:center}
.login-card .subtitle{font-size:14px;color:var(--ink3);margin-bottom:2rem;text-align:center;line-height:1.6}
.form-group{margin-bottom:1.1rem}
.form-group label{display:block;font-size:13px;font-weight:600;color:var(--ink2);margin-bottom:5px}
.form-group input{width:100%;border:1.5px solid var(--border);border-radius:var(--radius-sm);padding:13px 16px;font-size:15px;font-family:'DM Sans',sans-serif;outline:none;transition:border-color .2s,box-shadow .2s;color:var(--ink);background:#fafafa}
.form-group input:focus{border-color:var(--violet);box-shadow:0 0 0 3px rgba(108,71,255,.1);background:#fff}
.login-btn{width:100%;background:linear-gradient(135deg,var(--violet),var(--violet2));color:#fff;border:none;padding:15px;border-radius:var(--radius-sm);font-family:'Sora',sans-serif;font-size:15px;font-weight:700;cursor:pointer;margin-top:.5rem;transition:transform .15s,box-shadow .15s;letter-spacing:-.01em}
.login-btn:hover{transform:translateY(-1px);box-shadow:0 6px 24px rgba(108,71,255,.35)}
.login-btn:active{transform:translateY(0)}
.login-err{background:#fff1f2;border:1px solid #fecdd3;color:#e11d48;border-radius:8px;padding:10px 14px;font-size:13px;margin-top:1rem;display:none;border-radius:var(--radius-sm)}
.login-note{font-size:12px;color:var(--ink3);text-align:center;margin-top:1.5rem;line-height:1.6}

/* ─── APP SHELL ─── */
.app{display:none;min-height:100vh}
.app.show{display:flex}

/* ─── SIDEBAR ─── */
.sidebar{width:var(--sidebar-w);background:var(--sidebar-bg);color:#fff;display:flex;flex-direction:column;flex-shrink:0;position:sticky;top:0;height:100vh;overflow-y:auto}
.sb-brand{padding:1.75rem 1.75rem 1.25rem;display:flex;align-items:center;gap:10px;border-bottom:1px solid rgba(255,255,255,.06)}
.sb-brand-text{font-family:'Sora',sans-serif;font-size:17px;font-weight:700;color:#fff}
.sb-brand-text span{color:#a78bfa}
.sb-brand-tag{font-size:10px;font-weight:700;background:var(--violet);color:#fff;padding:2px 8px;border-radius:6px;margin-left:auto}
.sb-user{padding:1.25rem 1.75rem;border-bottom:1px solid rgba(255,255,255,.06);display:flex;align-items:center;gap:12px}
.sb-avatar{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--violet),var(--violet2));display:flex;align-items:center;justify-content:center;font-family:'Sora',sans-serif;font-size:14px;font-weight:700;flex-shrink:0;color:#fff}
.sb-name{font-size:13px;font-weight:700;color:#fff}
.sb-email{font-size:11px;color:#6b7280;margin-top:1px}
.sb-progress{padding:1.25rem 1.75rem;border-bottom:1px solid rgba(255,255,255,.06)}
.sb-plabel{font-size:10px;color:#6b7280;font-weight:700;text-transform:uppercase;letter-spacing:1.2px;margin-bottom:8px}
.pbar{background:rgba(255,255,255,.08);border-radius:999px;height:5px;overflow:hidden}
.pbar-fill{background:linear-gradient(90deg,var(--violet),#a78bfa);height:100%;border-radius:999px;transition:width .6s cubic-bezier(.34,1.56,.64,1)}
.pbar-text{font-size:11px;color:#9ca3af;margin-top:6px}
.sb-nav{padding:1rem 0;flex:1}
.sb-section{padding:.5rem 1.75rem .2rem;font-size:10px;color:#4b5563;font-weight:700;text-transform:uppercase;letter-spacing:1.5px;margin-top:.75rem}
.sb-item{display:flex;align-items:center;gap:10px;padding:.65rem 1.75rem;cursor:pointer;transition:background .15s;position:relative;border-left:3px solid transparent}
.sb-item:hover{background:rgba(255,255,255,.04)}
.sb-item.active{background:rgba(108,71,255,.2);border-left-color:var(--violet)}
.sb-icon{font-size:16px;flex-shrink:0;width:20px;text-align:center}
.sb-label{font-size:13px;color:#9ca3af;flex:1;line-height:1.3;transition:color .15s}
.sb-item.active .sb-label,.sb-item:hover .sb-label{color:#fff}
.sb-item.active .sb-label{font-weight:600}
.sb-badge{font-size:10px;font-weight:700;padding:2px 7px;border-radius:999px;flex-shrink:0}
.bd-done{background:#065f46;color:#6ee7b7}
.bd-free{background:#78350f;color:#fcd34d}
.bd-lock{background:rgba(255,255,255,.06);color:#4b5563}
.sb-bottom{padding:1.25rem 1.75rem;border-top:1px solid rgba(255,255,255,.06)}
.sb-logout{font-size:13px;color:#6b7280;cursor:pointer;display:flex;align-items:center;gap:8px;transition:color .2s}
.sb-logout:hover{color:#d1d5db}

/* ─── MAIN ─── */
.main{flex:1;overflow-y:auto;display:flex;flex-direction:column;min-width:0}
.main-header{background:rgba(255,255,255,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);padding:1.1rem 2.5rem;display:flex;align-items:center;justify-content:space-between;gap:1rem;position:sticky;top:0;z-index:100}
.main-title{font-family:'Sora',sans-serif;font-size:16px;font-weight:700;color:var(--ink)}
.main-actions{display:flex;align-items:center;gap:10px}
.hdr-btn{background:var(--violet-pale);color:var(--violet);border:1px solid var(--violet-border);padding:8px 16px;border-radius:8px;font-size:13px;font-weight:600;cursor:pointer;font-family:'Sora',sans-serif;transition:all .2s}
.hdr-btn:hover{background:var(--violet);color:#fff}

/* ─── SCREENS ─── */
.screen{display:none;padding:2.5rem;flex:1;animation:fadeIn .3s ease}
.screen.active{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

/* ─── DASHBOARD ─── */
.welcome-banner{background:linear-gradient(135deg,var(--violet) 0%,#4f35d6 50%,#7c3aed 100%);border-radius:24px;padding:2.75rem 3rem;color:#fff;margin-bottom:2rem;position:relative;overflow:hidden}
.welcome-banner::before{content:'';position:absolute;right:-80px;top:-80px;width:320px;height:320px;background:rgba(255,255,255,.05);border-radius:50%;pointer-events:none}
.welcome-banner::after{content:'';position:absolute;right:100px;bottom:-120px;width:200px;height:200px;background:rgba(255,255,255,.04);border-radius:50%;pointer-events:none}
.wb-tag{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.2);padding:5px 12px;border-radius:999px;font-size:12px;font-weight:600;margin-bottom:1rem;backdrop-filter:blur(8px)}
.welcome-banner h2{font-size:28px;font-weight:700;margin-bottom:.6rem;line-height:1.25}
.welcome-banner p{font-size:15px;color:#ddd6fe;margin-bottom:1.75rem;line-height:1.65;max-width:560px}
.wb-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.wb-btn-primary{background:#fff;color:var(--violet);border:none;padding:12px 24px;border-radius:10px;font-family:'Sora',sans-serif;font-size:14px;font-weight:700;cursor:pointer;transition:all .2s}
.wb-btn-primary:hover{background:#f5f3ff;transform:translateY(-1px)}
.wb-btn-secondary{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.25);padding:12px 24px;border-radius:10px;font-family:'Sora',sans-serif;font-size:14px;font-weight:600;cursor:pointer;backdrop-filter:blur(8px)}

.stats-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:14px;margin-bottom:2rem}
.stat-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:1.4rem 1.25rem;transition:box-shadow .2s}
.stat-card:hover{box-shadow:var(--shadow)}
.sc-num{font-family:'Sora',sans-serif;font-size:30px;font-weight:700;color:var(--violet);margin-bottom:3px}
.sc-label{font-size:12px;color:var(--ink3);font-weight:500}
.sc-icon{font-size:22px;margin-bottom:.5rem}

.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.25rem}
.section-head h3{font-size:18px;font-weight:700;color:var(--ink)}
.section-head span{font-size:13px;color:var(--ink3)}

.module-grid{display:flex;flex-direction:column;gap:10px}
.mod-card{background:#fff;border:1.5px solid var(--border);border-radius:var(--radius);padding:1.4rem 1.5rem;display:flex;align-items:center;gap:16px;cursor:pointer;transition:all .22s}
.mod-card:hover{border-color:var(--violet-border);transform:translateY(-2px);box-shadow:var(--shadow)}
.mod-card.done{border-color:#a7f3d0;background:#f0fdf4}
.mod-card.locked{opacity:.55;cursor:not-allowed}
.mod-card.locked:hover{transform:none;box-shadow:none;border-color:var(--border)}
.mc-num{width:46px;height:46px;border-radius:12px;background:var(--violet-pale);color:var(--violet);display:flex;align-items:center;justify-content:center;font-family:'Sora',sans-serif;font-size:13px;font-weight:700;flex-shrink:0}
.mod-card.done .mc-num{background:#dcfce7;color:#16a34a}
.mc-body{flex:1;min-width:0}
.mc-title{font-family:'Sora',sans-serif;font-size:15px;font-weight:700;color:var(--ink);margin-bottom:3px}
.mc-desc{font-size:13px;color:var(--ink3);line-height:1.5;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mc-meta{font-size:12px;color:var(--ink3);margin-top:6px;display:flex;gap:14px;flex-wrap:wrap}
.mc-right{display:flex;flex-direction:column;align-items:flex-end;gap:6px;flex-shrink:0}
.mc-tag{font-size:11px;font-weight:700;padding:3px 10px;border-radius:999px}
.tag-free{background:#fef3c7;color:#92400e}
.tag-proj{background:#ede9fe;color:#6d28d9}
.tag-bonus{background:#ecfdf5;color:#065f46}
.tag-money{background:#fce7f3;color:#9d174d}

/* ─── LESSON VIEW ─── */
.lesson-header{margin-bottom:2rem}
.breadcrumb{font-size:13px;color:var(--ink3);margin-bottom:.75rem;cursor:pointer;display:inline-flex;align-items:center;gap:5px;transition:color .2s}
.breadcrumb:hover{color:var(--violet)}
.lesson-title{font-family:'Sora',sans-serif;font-size:28px;font-weight:700;color:var(--ink);margin-bottom:.5rem;line-height:1.25}
.lesson-meta{font-size:13px;color:var(--ink3);display:flex;gap:1rem;flex-wrap:wrap;align-items:center}
.lm-pill{background:var(--violet-pale);color:var(--violet);padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600}

/* ─── LESSONS LIST ─── */
.lessons-list{display:flex;flex-direction:column;gap:8px;margin-top:1.5rem;max-width:780px}
.lesson-item{display:flex;align-items:center;gap:12px;padding:1rem 1.25rem;background:#fff;border:1.5px solid var(--border);border-radius:12px;cursor:pointer;transition:all .2s}
.lesson-item:hover{border-color:var(--violet-border);background:var(--violet-pale)}
.lesson-item.done{border-color:#a7f3d0;background:#f0fdf4}
.li-num{width:32px;height:32px;border-radius:8px;background:var(--violet-pale);color:var(--violet);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;flex-shrink:0}
.lesson-item.done .li-num{background:#dcfce7;color:#16a34a}
.li-title{flex:1;font-size:14px;font-weight:600;color:var(--ink)}
.li-dur{font-size:12px;color:var(--ink3);flex-shrink:0}
.li-arrow{font-size:16px;flex-shrink:0}

/* ─── LESSON CONTENT ─── */
.lesson-body{background:#fff;border:1.5px solid var(--border);border-radius:20px;padding:2.75rem;margin-bottom:1.5rem;max-width:780px}
.lesson-body h3{font-family:'Sora',sans-serif;font-size:20px;font-weight:700;color:var(--ink);margin:2rem 0 .9rem;line-height:1.3}
.lesson-body h3:first-child{margin-top:0}
.lesson-body h4{font-family:'Sora',sans-serif;font-size:16px;font-weight:700;color:var(--ink2);margin:1.5rem 0 .6rem}
.lesson-body p{font-size:15px;color:#374151;line-height:1.85;margin-bottom:1.25rem}
.lesson-body ul,.lesson-body ol{padding-left:1.5rem;margin-bottom:1.25rem}
.lesson-body li{font-size:15px;color:#374151;line-height:1.8;margin-bottom:.5rem}
.lesson-body strong{font-weight:700;color:var(--ink)}
.lesson-body em{font-style:italic;color:#6d28d9}
.lesson-body blockquote{border-left:4px solid var(--violet);padding:1rem 1.5rem;background:var(--violet-pale);border-radius:0 12px 12px 0;margin:1.5rem 0}
.lesson-body blockquote p{margin-bottom:0;color:#4c1d95;font-weight:500;font-style:italic}
.task-box{background:#f0fdf4;border:1.5px solid #bbf7d0;border-radius:12px;padding:1.25rem 1.5rem;margin:1.5rem 0}
.task-box strong{color:#15803d}
.highlight{background:#fefce8;border:1.5px solid #fde68a;border-radius:10px;padding:.85rem 1.25rem;margin:1rem 0;font-size:14px;color:#92400e;display:flex;gap:10px;align-items:flex-start}
.tip-box{background:#eff6ff;border:1.5px solid #bfdbfe;border-radius:10px;padding:.85rem 1.25rem;margin:1rem 0;font-size:14px;color:#1e40af}
.warn-box{background:#fff7ed;border:1.5px solid #fed7aa;border-radius:10px;padding:.85rem 1.25rem;margin:1rem 0;font-size:14px;color:#c2410c}

/* GIF ILLUSTRATION BOX */
.gif-box{border-radius:16px;overflow:hidden;margin:1.75rem 0;position:relative;border:1.5px solid var(--border);background:#f8f7ff}
.gif-box img{width:100%;display:block;max-height:280px;object-fit:cover}
.gif-caption{padding:.75rem 1.25rem;font-size:12px;color:var(--ink3);text-align:center;background:#fff;border-top:1px solid var(--border)}

/* ─── MINI QUIZ ─── */
.quiz-block{background:linear-gradient(135deg,#1e1b4b,#2d1b69);border-radius:20px;padding:2rem;margin:2rem 0;color:#fff;position:relative;overflow:hidden}
.quiz-block::before{content:'';position:absolute;right:-40px;top:-40px;width:180px;height:180px;background:rgba(255,255,255,.04);border-radius:50%}
.quiz-header{display:flex;align-items:center;gap:10px;margin-bottom:.5rem}
.quiz-chip{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);padding:4px 12px;border-radius:999px;font-size:11px;font-weight:700;color:#c4b5fd;letter-spacing:.05em;text-transform:uppercase}
.quiz-num{font-size:11px;color:#7c6fb5}
.quiz-q{font-family:'Sora',sans-serif;font-size:17px;font-weight:700;color:#fff;margin-bottom:1.25rem;line-height:1.4}
.quiz-options{display:flex;flex-direction:column;gap:10px;margin-bottom:1.25rem}
.quiz-opt{display:flex;align-items:flex-start;gap:12px;background:rgba(255,255,255,.07);border:1.5px solid rgba(255,255,255,.12);border-radius:12px;padding:.9rem 1.1rem;cursor:pointer;transition:all .2s;text-align:left}
.quiz-opt:hover:not(.disabled){background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.25);transform:translateX(3px)}
.quiz-opt.correct{background:rgba(16,185,129,.2);border-color:#10b981;pointer-events:none}
.quiz-opt.wrong{background:rgba(244,63,94,.15);border-color:#f43f5e;pointer-events:none}
.quiz-opt.disabled{pointer-events:none;opacity:.7}
.opt-letter{width:28px;height:28px;border-radius:8px;background:rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:#c4b5fd;flex-shrink:0}
.quiz-opt.correct .opt-letter{background:#10b981;color:#fff}
.quiz-opt.wrong .opt-letter{background:#f43f5e;color:#fff}
.opt-text{font-size:14px;color:#e2e8f0;line-height:1.5;padding-top:4px}
.quiz-feedback{display:none;padding:1rem 1.25rem;border-radius:12px;font-size:14px;line-height:1.6;margin-top:.5rem}
.quiz-feedback.show{display:block}
.quiz-feedback.good{background:rgba(16,185,129,.15);border:1px solid rgba(16,185,129,.3);color:#6ee7b7}
.quiz-feedback.bad{background:rgba(244,63,94,.12);border:1px solid rgba(244,63,94,.3);color:#fda4af}
.quiz-explain{background:rgba(255,255,255,.06);border-radius:10px;padding:.9rem 1.1rem;font-size:13px;color:#c4b5fd;margin-top:1rem;display:none;line-height:1.65}
.quiz-explain.show{display:block}
.quiz-next-btn{background:linear-gradient(135deg,var(--violet),#8b5cf6);color:#fff;border:none;padding:11px 22px;border-radius:10px;font-family:'Sora',sans-serif;font-size:13px;font-weight:700;cursor:pointer;margin-top:.75rem;transition:all .2s;display:none}
.quiz-next-btn.show{display:inline-flex;align-items:center;gap:6px}
.quiz-next-btn:hover{transform:translateY(-1px);box-shadow:0 4px 16px rgba(108,71,255,.4)}
.quiz-score{font-size:12px;color:#7c6fb5;margin-top:.5rem}

/* FILL IN BLANK quiz */
.quiz-fill{background:linear-gradient(135deg,#0f172a,#1e293b);border-radius:20px;padding:2rem;margin:2rem 0;color:#fff}
.fill-input-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:1rem}
.fill-before,.fill-after{font-size:15px;color:#cbd5e1;line-height:1.8}
.fill-input{background:rgba(255,255,255,.08);border:1.5px solid rgba(255,255,255,.2);border-radius:8px;padding:8px 14px;color:#fff;font-size:14px;font-family:'DM Sans',sans-serif;outline:none;min-width:120px;transition:border-color .2s}
.fill-input:focus{border-color:#a78bfa}
.fill-input.correct{border-color:#10b981;background:rgba(16,185,129,.1)}
.fill-input.wrong{border-color:#f43f5e;background:rgba(244,63,94,.08)}
.fill-check-btn{background:var(--violet);color:#fff;border:none;padding:9px 18px;border-radius:8px;font-family:'Sora',sans-serif;font-size:13px;font-weight:700;cursor:pointer}

/* ─── LESSON NAV ─── */
.lesson-nav{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;max-width:780px;margin-top:1rem}
.ln-btn{display:flex;align-items:center;gap:8px;padding:13px 22px;border-radius:10px;font-family:'Sora',sans-serif;font-size:14px;font-weight:700;cursor:pointer;border:none;transition:all .2s}
.ln-prev{background:#fff;color:var(--ink);border:1.5px solid var(--border)}
.ln-prev:hover{background:var(--violet-pale);border-color:var(--violet-border)}
.ln-next{background:linear-gradient(135deg,var(--violet),var(--violet2));color:#fff}
.ln-next:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(108,71,255,.35)}
.ln-complete{background:linear-gradient(135deg,#10b981,#059669);color:#fff}
.ln-complete:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(16,185,129,.3)}

/* ─── CERTIFICATE ─── */
.cert-screen{text-align:center;padding:3rem 2rem}
.cert-card{background:#fff;border:2px solid var(--violet-border);border-radius:28px;padding:4rem 3.5rem;max-width:620px;margin:0 auto;box-shadow:var(--shadow-lg);position:relative;overflow:hidden}
.cert-card::before{content:'';position:absolute;top:0;left:0;right:0;height:6px;background:linear-gradient(90deg,var(--violet),#a78bfa,var(--violet))}
.cert-badge{font-size:64px;margin-bottom:1.5rem}
.cert-card h2{font-family:'Sora',sans-serif;font-size:30px;font-weight:700;color:var(--ink);margin-bottom:.4rem}
.cert-card h3{font-family:'Sora',sans-serif;font-size:20px;font-weight:500;color:var(--violet);margin-bottom:1rem}
.cert-card p{font-size:15px;color:var(--ink3);line-height:1.7;margin-bottom:.4rem}
.cert-line{width:200px;height:2px;background:var(--violet-border);margin:2rem auto}
.cert-sig{font-family:'Sora',sans-serif;font-size:16px;font-weight:700;color:var(--ink)}
.cert-sig-label{font-size:12px;color:var(--ink3);margin-top:4px}
.cert-dl-btn{background:linear-gradient(135deg,var(--violet),var(--violet2));color:#fff;border:none;padding:15px 36px;border-radius:12px;font-family:'Sora',sans-serif;font-size:15px;font-weight:700;cursor:pointer;margin-top:2rem;transition:all .2s}
.cert-dl-btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(108,71,255,.4)}

/* ─── COMMUNITY ─── */
.community-card{background:#fff;border:1.5px solid var(--border);border-radius:20px;padding:2rem;margin-bottom:16px;max-width:620px}
.community-card h3{font-family:'Sora',sans-serif;font-size:18px;font-weight:700;color:var(--ink);margin-bottom:.5rem}
.community-card p{font-size:14px;color:var(--ink3);line-height:1.7;margin-bottom:1.25rem}
.comm-btn{display:inline-flex;align-items:center;gap:8px;background:var(--violet);color:#fff;border:none;padding:11px 22px;border-radius:10px;font-family:'Sora',sans-serif;font-size:14px;font-weight:700;cursor:pointer;text-decoration:none;transition:all .2s}
.comm-btn:hover{background:#5b38d4;transform:translateY(-1px)}

/* ─── PROGRESS TRACKER ─── */
.progress-tracker{background:#fff;border:1.5px solid var(--border);border-radius:20px;padding:2rem;margin-bottom:2rem;max-width:780px}
.pt-title{font-family:'Sora',sans-serif;font-size:16px;font-weight:700;color:var(--ink);margin-bottom:1.25rem}
.pt-modules{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px}
.pt-mod{text-align:center;background:var(--bg);border:1.5px solid var(--border);border-radius:12px;padding:.75rem .5rem;transition:all .2s}
.pt-mod.done{background:#f0fdf4;border-color:#a7f3d0}
.pt-mod-icon{font-size:20px;margin-bottom:4px}
.pt-mod-label{font-size:11px;color:var(--ink3);font-weight:600;line-height:1.3}

/* ─── TOAST ─── */
.toast{position:fixed;bottom:2rem;right:2rem;background:var(--ink);color:#fff;padding:14px 20px;border-radius:14px;font-size:14px;font-weight:500;z-index:9999;transform:translateY(80px);opacity:0;transition:all .3s cubic-bezier(.34,1.56,.64,1);max-width:340px;box-shadow:0 8px 32px rgba(0,0,0,.25)}
.toast.show{transform:translateY(0);opacity:1}
.toast.success{border-left:4px solid var(--emerald)}
.toast.info{border-left:4px solid var(--sky)}

/* ─── CONFETTI ─── */
.confetti-container{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:9998;overflow:hidden}
.confetti-piece{position:absolute;width:10px;height:10px;border-radius:2px;animation:confettiFall linear forwards}
@keyframes confettiFall{0%{transform:translateY(-20px) rotate(0deg);opacity:1}100%{transform:translateY(100vh) rotate(720deg);opacity:0}}

/* ─── RESPONSIVE ─── */
@media(max-width:768px){
  .sidebar{display:none}
  .screen{padding:1.25rem}
  .lesson-body{padding:1.5rem}
  .welcome-banner{padding:1.75rem}
  .welcome-banner h2{font-size:22px}
  .quiz-block,.quiz-fill{padding:1.5rem}
  .stat-card{padding:1rem}
}

/* ─── CODE BLOCK ─── */
.code-block{background:#0f172a;border-radius:12px;padding:1.25rem 1.5rem;margin:1.25rem 0;overflow-x:auto;border:1px solid #1e293b}
.code-block pre{font-family:'Courier New',monospace;font-size:13px;color:#e2e8f0;line-height:1.7;white-space:pre;margin:0}
.code-block .kw{color:#c084fc}
.code-block .str{color:#86efac}
.code-block .cmt{color:#475569}
.code-block .fn{color:#7dd3fc}
.code-block .num{color:#fca5a5}

/* ─── ACCORDION ─── */
.accordion{background:#fff;border:1.5px solid var(--border);border-radius:14px;margin:1.25rem 0;overflow:hidden}
.accordion-header{padding:1rem 1.25rem;cursor:pointer;display:flex;align-items:center;justify-content:space-between;font-weight:600;color:var(--ink);transition:background .2s}
.accordion-header:hover{background:var(--violet-pale)}
.accordion-body{display:none;padding:0 1.25rem 1rem;font-size:14px;color:var(--ink3);line-height:1.7;border-top:1px solid var(--border)}
.accordion-body.open{display:block}
.accordion-arrow{transition:transform .3s;font-size:12px}
.accordion-header.open .accordion-arrow{transform:rotate(180deg)}

/* ─── PROGRESS MODULE BAR ─── */
.module-progress{display:flex;align-items:center;gap:10px;margin-bottom:1.5rem;max-width:780px}
.mp-label{font-size:13px;color:var(--ink3);font-weight:600;flex-shrink:0}
.mp-bar{flex:1;background:var(--bg2);border-radius:999px;height:8px;overflow:hidden;border:1px solid var(--border)}
.mp-fill{background:linear-gradient(90deg,var(--violet),#a78bfa);height:100%;border-radius:999px;transition:width .5s ease}
.mp-pct{font-size:13px;color:var(--violet);font-weight:700;flex-shrink:0}