@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:wght@400;600;700&family=DM+Sans:wght@400;500;600;700&display=swap');

*{margin:0;padding:0;box-sizing:border-box}

:root{
  --font-display:'Source Serif 4',Georgia,serif;
  --font-body:'DM Sans',-apple-system,BlinkMacSystemFont,sans-serif;
  --primary:#2d5016;--primary-light:#4a7c2c;--primary-soft:#6b8e23;
  --accent:#d4a039;--accent-glow:rgba(212,160,57,0.15);
  --bg-main:#faf9f6;--bg-card:#ffffff;--bg-elevated:#f5f4f0;--bg-code:#f0ede6;--bg-danger:#fef2f2;
  --text-dark:#1a1a1a;--text-medium:#4a4a4a;--text-light:#7a7a7a;--text-muted:#9a9a9a;
  --border:#e5e2db;--border-subtle:#eeecea;
  --success:#2d6a1e;--success-bg:rgba(45,106,30,0.08);
  --warning:#b8860b;--warning-bg:rgba(184,134,11,0.08);
  --error:#c41e1e;--error-bg:rgba(196,30,30,0.06);
  --info-bg:rgba(45,80,22,0.05);
  --shadow-sm:0 1px 3px rgba(0,0,0,0.06),0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:0 4px 12px rgba(0,0,0,0.06),0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg:0 12px 40px rgba(0,0,0,0.08);
  --shadow-glow:0 0 0 3px rgba(45,80,22,0.12);
  --radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:24px;
  --space-xs:0.5rem;--space-sm:1rem;--space-md:1.5rem;--space-lg:2rem;--space-xl:3rem
}

[data-theme="dark"], body[data-theme="dark"]{
  --primary:#7cb563;--primary-light:#8fc978;--primary-soft:#a3d68e;
  --accent:#e8b84d;--accent-glow:rgba(232,184,77,0.12);
  --bg-main:#141413;--bg-card:#1e1e1c;--bg-elevated:#262624;--bg-code:#2a2a27;--bg-danger:#2a1616;
  --text-dark:#eaeae6;--text-medium:#b8b8b0;--text-light:#8a8a82;--text-muted:#606058;
  --border:#333330;--border-subtle:#2a2a27;
  --success:#7cb563;--success-bg:rgba(124,181,99,0.1);
  --warning:#e8b84d;--warning-bg:rgba(232,184,77,0.1);
  --error:#e85555;--error-bg:rgba(232,85,85,0.08);
  --info-bg:rgba(124,181,99,0.06);
  --shadow-sm:0 1px 3px rgba(0,0,0,0.2);--shadow-md:0 4px 12px rgba(0,0,0,0.25);--shadow-lg:0 12px 40px rgba(0,0,0,0.35);
  --shadow-glow:0 0 0 3px rgba(124,181,99,0.15)
}

@keyframes fadeInUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes scaleIn{from{opacity:0;transform:scale(0.95)}to{opacity:1;transform:scale(1)}}
@keyframes slideDown{from{opacity:0;max-height:0}to{opacity:1;max-height:2000px}}
@keyframes progressGrow{from{width:0}}
@keyframes confetti{0%{transform:translateY(0) rotate(0deg);opacity:1}100%{transform:translateY(-80px) rotate(720deg);opacity:0}}

.anim-in{animation:fadeInUp .4s ease-out both}
.anim-fade{animation:fadeIn .3s ease-out both}
.anim-scale{animation:scaleIn .3s ease-out both}
.anim-slide{animation:slideDown .4s ease-out both;overflow:hidden}

.stagger>*{opacity:0;animation:fadeInUp .4s ease-out both}
.stagger>*:nth-child(1){animation-delay:.04s}
.stagger>*:nth-child(2){animation-delay:.08s}
.stagger>*:nth-child(3){animation-delay:.12s}
.stagger>*:nth-child(4){animation-delay:.16s}
.stagger>*:nth-child(5){animation-delay:.2s}
.stagger>*:nth-child(6){animation-delay:.24s}
.stagger>*:nth-child(7){animation-delay:.28s}
.stagger>*:nth-child(8){animation-delay:.32s}
.stagger>*:nth-child(9){animation-delay:.36s}
.stagger>*:nth-child(10){animation-delay:.4s}
.stagger>*:nth-child(11){animation-delay:.44s}
.stagger>*:nth-child(12){animation-delay:.48s}

body{font-family:var(--font-body);background:var(--bg-main);color:var(--text-dark);line-height:1.6;-webkit-font-smoothing:antialiased;transition:background .3s,color .3s}
#root{min-height:100vh;display:flex;flex-direction:column}

.app-container{max-width:860px;margin:0 auto;padding:var(--space-md);width:100%}
.app-header{text-align:center;padding:var(--space-lg) 0 var(--space-md);margin-bottom:var(--space-lg);position:relative}
.app-header::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60px;height:3px;background:linear-gradient(90deg,var(--primary),var(--accent));border-radius:2px}
.app-header h1{font-family:var(--font-display);font-size:1.75rem;color:var(--primary);margin-bottom:var(--space-xs);font-weight:700;letter-spacing:-.02em}
.app-header p{color:var(--text-medium);font-size:1rem}

.theme-toggle{position:fixed;top:1rem;right:1rem;z-index:100;background:var(--bg-card);border:1px solid var(--border);border-radius:50%;width:42px;height:42px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:1.2rem;box-shadow:var(--shadow-sm);transition:all .2s}
.theme-toggle:hover{box-shadow:var(--shadow-md);transform:scale(1.08)}

.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--space-md);margin-bottom:var(--space-md);box-shadow:var(--shadow-sm);transition:all .25s}
.card-click{cursor:pointer}
.card-click:hover{border-color:var(--primary);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.card-click:active{transform:translateY(0)}
.card-done{border-color:var(--success);position:relative}
.card-done::before{content:'✓';position:absolute;top:-8px;right:-8px;width:24px;height:24px;background:var(--success);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.7rem;font-weight:700;box-shadow:var(--shadow-sm)}
.card-title{font-family:var(--font-display);font-size:1.2rem;color:var(--text-dark);margin-bottom:var(--space-sm);font-weight:600}
.card-text{color:var(--text-medium);margin-bottom:var(--space-sm);line-height:1.7}

.dashboard{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);border-radius:var(--radius-lg);padding:var(--space-lg);color:#fff;margin-bottom:var(--space-lg);position:relative;overflow:hidden}
.dashboard::before{content:'';position:absolute;top:-50%;right:-20%;width:200px;height:200px;background:rgba(255,255,255,.06);border-radius:50%}
.dashboard::after{content:'';position:absolute;bottom:-30%;left:-10%;width:150px;height:150px;background:rgba(255,255,255,.04);border-radius:50%}
.dashboard h2{font-family:var(--font-display);font-size:1.1rem;font-weight:600;margin-bottom:var(--space-sm);position:relative;z-index:1}
.pbar-wrap{background:rgba(255,255,255,.2);border-radius:20px;height:10px;overflow:hidden;position:relative;z-index:1}
.pbar-fill{height:100%;background:rgba(255,255,255,.9);border-radius:20px;transition:width .8s cubic-bezier(.25,1,.5,1)}
.pbar-stats{display:flex;justify-content:space-between;margin-top:var(--space-xs);font-size:.85rem;opacity:.9;position:relative;z-index:1}
.badges{display:flex;gap:var(--space-xs);flex-wrap:wrap;margin-top:var(--space-sm);position:relative;z-index:1}
.badge{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:20px;font-size:.75rem;font-weight:600;background:rgba(255,255,255,.15);backdrop-filter:blur(4px)}
.badge-off{opacity:.35;filter:grayscale(1)}

.mod-icon{font-size:2rem;width:52px;height:52px;display:flex;align-items:center;justify-content:center;background:var(--bg-elevated);border-radius:var(--radius-md);flex-shrink:0;transition:background .2s}
.card-click:hover .mod-icon{background:var(--accent-glow)}
.mod-arrow{font-size:1.2rem;color:var(--text-muted);transition:all .2s;flex-shrink:0}
.card-click:hover .mod-arrow{color:var(--primary);transform:translateX(3px)}

.level-selector{display:grid;gap:var(--space-md);margin:var(--space-lg) 0}
.level-card{background:var(--bg-card);border:2px solid var(--border);border-radius:var(--radius-lg);padding:var(--space-md);cursor:pointer;transition:all .2s;text-align:left}
.level-card:hover{border-color:var(--primary);box-shadow:var(--shadow-glow);transform:translateY(-2px)}
.level-icon{font-size:1.8rem;margin-bottom:var(--space-xs)}
.level-title{font-family:var(--font-display);font-size:1.05rem;font-weight:600;color:var(--text-dark);margin-bottom:4px}
.level-description{color:var(--text-medium);font-size:.9rem}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:.7rem 1.4rem;border:none;border-radius:var(--radius-md);font-size:.95rem;font-weight:600;cursor:pointer;transition:all .2s;text-align:center;text-decoration:none;font-family:var(--font-body);letter-spacing:-.01em}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none!important}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover:not(:disabled){background:var(--primary-light);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-secondary{background:transparent;border:2px solid var(--border);color:var(--text-medium)}
.btn-secondary:hover:not(:disabled){border-color:var(--primary);color:var(--primary);background:var(--info-bg)}
.btn-full{width:100%}
.btn-group{display:flex;gap:var(--space-sm);flex-wrap:wrap}

.input-field{width:100%;padding:.7rem .9rem;border:2px solid var(--border);border-radius:var(--radius-md);font-size:.95rem;font-family:var(--font-body);transition:all .2s;margin-bottom:var(--space-sm);background:var(--bg-card);color:var(--text-dark)}
.input-field:focus{outline:none;border-color:var(--primary);box-shadow:var(--shadow-glow)}
.textarea-field{width:100%;min-height:120px;padding:.7rem .9rem;border:2px solid var(--border);border-radius:var(--radius-md);font-size:.95rem;font-family:var(--font-body);resize:vertical;transition:all .2s;margin-bottom:var(--space-sm);background:var(--bg-card);color:var(--text-dark);line-height:1.6}
.textarea-field:focus{outline:none;border-color:var(--primary);box-shadow:var(--shadow-glow)}

.prompt-box{background:var(--bg-code);border-left:4px solid var(--primary);padding:var(--space-md);margin:var(--space-md) 0;border-radius:0 var(--radius-md) var(--radius-md) 0;font-family:'Courier New',monospace;font-size:.88rem;line-height:1.65;color:var(--text-dark)}
.prompt-danger{background:var(--bg-danger);border-left-color:var(--error)}

.options-list{list-style:none;margin:var(--space-md) 0}
.option-item{background:var(--bg-card);border:2px solid var(--border);border-radius:var(--radius-md);padding:var(--space-md);margin-bottom:var(--space-sm);cursor:pointer;transition:all .2s;line-height:1.5}
.option-item:hover:not(.correct):not(.incorrect){border-color:var(--primary-soft);background:var(--info-bg)}
.option-item.selected{border-color:var(--primary);background:var(--info-bg)}
.option-item.correct{border-color:var(--success);background:var(--success-bg)}
.option-item.incorrect{border-color:var(--error);background:var(--error-bg)}

.checkbox-wrapper{display:flex;align-items:flex-start;gap:10px;margin-bottom:var(--space-xs);cursor:pointer;padding:var(--space-xs);border-radius:var(--radius-sm);transition:background .15s;line-height:1.5}
.checkbox-wrapper:hover{background:var(--info-bg)}
.checkbox-wrapper input[type="checkbox"],.checkbox-wrapper input[type="radio"]{width:18px;height:18px;cursor:pointer;accent-color:var(--primary);flex-shrink:0;margin-top:2px}

.feedback-box{padding:var(--space-md);border-radius:var(--radius-lg);margin:var(--space-md) 0;border-left:4px solid;animation:scaleIn .3s ease-out}
.feedback-box.success{background:var(--success-bg);border-color:var(--success)}
.feedback-box.error{background:var(--error-bg);border-color:var(--error)}
.feedback-box.info{background:var(--info-bg);border-color:var(--primary)}
.feedback-box.warning{background:var(--warning-bg);border-color:var(--warning)}
.feedback-title{font-family:var(--font-display);font-weight:600;font-size:1.05rem;margin-bottom:var(--space-xs);display:flex;align-items:center;gap:var(--space-xs)}

.book-reference{background:linear-gradient(135deg,var(--info-bg),var(--accent-glow));border:1px solid var(--primary);border-radius:var(--radius-lg);padding:var(--space-md);margin-top:var(--space-lg);display:flex;align-items:flex-start;gap:var(--space-sm)}
.book-icon{font-size:1.4rem;flex-shrink:0}
.book-text{color:var(--text-dark);font-size:.92rem;line-height:1.55}
.book-chapter{font-weight:600;color:var(--primary)}

.progress-bar{width:100%;height:6px;background:var(--border);border-radius:20px;overflow:hidden;margin:var(--space-sm) 0}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--primary-light));transition:width .5s cubic-bezier(.25,1,.5,1);border-radius:20px}

.score-display{text-align:center;margin:var(--space-lg) 0}
.score-number{font-family:var(--font-display);font-size:3.5rem;font-weight:700;color:var(--primary);line-height:1}
.score-label{font-size:.95rem;color:var(--text-medium);margin-top:var(--space-xs)}

.question-container{margin:var(--space-lg) 0}
.question-text{font-family:var(--font-display);font-size:1.08rem;color:var(--text-dark);margin-bottom:var(--space-md);font-weight:600;line-height:1.5}

.section-title{font-family:var(--font-display);font-size:1.15rem;font-weight:600;color:var(--text-dark);margin:var(--space-lg) 0 var(--space-md)}

.certificate{background:linear-gradient(135deg,#f8f6f0,#faf9f6);border:3px solid var(--accent);border-radius:var(--radius-xl);padding:var(--space-xl) var(--space-lg);text-align:center;position:relative;overflow:hidden}
[data-theme="dark"] .certificate{background:linear-gradient(135deg,#1e1e1c,#262624)}
.certificate::before,.certificate::after{content:'✦';position:absolute;font-size:6rem;color:var(--accent);opacity:.06}
.certificate::before{top:-10px;left:-10px}
.certificate::after{bottom:-10px;right:-10px}

.footer{text-align:center;margin-top:var(--space-xl);padding:var(--space-lg) 0;border-top:1px solid var(--border);color:var(--text-light);font-size:.88rem}
.footer a{color:var(--primary);text-decoration:none;transition:opacity .2s}
.footer a:hover{opacity:.8}
.footer-links{display:flex;justify-content:center;gap:var(--space-lg);margin-top:var(--space-sm);flex-wrap:wrap}

.confetti-particle{position:fixed;pointer-events:none;z-index:1000;animation:confetti 1.5s ease-out forwards}

.hint{font-size:.85rem;color:var(--text-light);margin-top:-.4rem;margin-bottom:.6rem}

@media(max-width:768px){
  .app-container{padding:var(--space-sm)}
  .app-header h1{font-size:1.4rem}
  .btn-group{flex-direction:column}
  .btn-group .btn{width:100%}
  .dashboard{padding:var(--space-md)}
  .score-number{font-size:2.8rem}
  .footer-links{flex-direction:column;align-items:center;gap:var(--space-xs)}
  .theme-toggle{top:.5rem;right:.5rem;width:36px;height:36px;font-size:1rem}
  .badges{justify-content:center}
}

.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
*:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
@media print{.theme-toggle,.btn,.progress-bar{display:none}.app-container{max-width:100%}.card{box-shadow:none;border:1px solid #ccc}}