:root{
  --brand:#0f5c4d;
  --brand-dark:#0c4a3e;
  --brand-light:#e7f3ef;
  --accent:#c97a2b;
  --bg:#f6f7f5;
  --card:#ffffff;
  --text:#1f2933;
  --muted:#616e7c;
  --border:#e1e6e3;
  --danger:#a3271e;
  --danger-bg:#fdecea;
  --ok:#1e6b3a;
  --ok-bg:#e7f6ec;
  --warn-bg:#fff4e0;
  --warn-border:#f0c987;
  --def-bg:#eaf1fb;
  --def-border:#a9c6ec;
  --tip-bg:#eef7ec;
  --tip-border:#a9d6a5;
  --example-bg:#f5f0fa;
  --example-border:#c9b3e6;
  --radius:10px;
}
*{box-sizing:border-box}
body{margin:0;font-family:'Segoe UI',system-ui,Arial,sans-serif;background:var(--bg);color:var(--text);}
a{color:var(--brand);text-decoration:none}
button{font-family:inherit}
.boot-loader{display:flex;align-items:center;justify-content:center;height:100vh;font-size:1.1rem;color:var(--muted);gap:.5rem}

/* ---------- Layout ---------- */
.app-shell{min-height:100vh;display:flex;flex-direction:column}
.header{background:var(--card);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:.7rem 1.2rem;position:sticky;top:0;z-index:20}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:700;color:var(--brand);font-size:1.15rem}
.brand i{font-size:1.4rem}
.header-actions{display:flex;align-items:center;gap:.6rem}
.icon-btn{background:none;border:1px solid var(--border);border-radius:8px;padding:.5rem .7rem;cursor:pointer;color:var(--text);font-size:1rem}
.icon-btn:hover{background:var(--brand-light)}
.user-chip{display:flex;align-items:center;gap:.5rem;font-size:.9rem;color:var(--muted)}

.body-layout{flex:1;display:flex;min-height:0}
.panel{background:var(--card);border-right:1px solid var(--border);width:280px;flex-shrink:0;overflow-y:auto;transition:margin-left .2s ease}
.panel.right{border-right:none;border-left:1px solid var(--border)}
.panel.collapsed{margin-left:-280px}
.panel.right.collapsed{margin-left:0;margin-right:-280px}
.main{flex:1;min-width:0;padding:1.5rem;overflow-y:auto}
.footer{background:var(--card);border-top:1px solid var(--border);text-align:center;padding:.8rem;font-size:.8rem;color:var(--muted)}

.toc h3{font-size:.8rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);padding:1rem 1rem .3rem}
.toc-module{border-bottom:1px solid var(--border)}
.toc-module>.toc-module-title{padding:.7rem 1rem;font-weight:600;font-size:.9rem;cursor:pointer;display:flex;justify-content:space-between;align-items:center;color:var(--text)}
.toc-lesson{padding:.5rem 1rem .5rem 2rem;font-size:.85rem;cursor:pointer;color:var(--muted);display:flex;align-items:center;gap:.4rem}
.toc-lesson:hover{background:var(--brand-light)}
.toc-lesson.active{background:var(--brand-light);color:var(--brand-dark);font-weight:600}
.toc-lesson.done i.fa-circle-check{color:var(--brand)}
.toc-lesson.locked{color:#b7bec4;cursor:not-allowed}
.toc-lesson.locked:hover{background:none}
.toc-lesson.locked i{color:#b7bec4}

.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.2rem;margin-bottom:1rem}

/* ---------- Slide content blocks ---------- */
.slide h2{color:var(--brand-dark);margin-top:0}
.block{border-radius:8px;padding:.9rem 1.1rem;margin:.9rem 0;line-height:1.55}
.block-content{white-space:pre-line}
.block-text{background:var(--card);border:1px solid var(--border)}
.block-definition{background:var(--def-bg);border:1px solid var(--def-border)}
.block-warning{background:var(--warn-bg);border:1px solid var(--warn-border)}
.block-tip{background:var(--tip-bg);border:1px solid var(--tip-border)}
.block-example{background:var(--example-bg);border:1px solid var(--example-border)}
.block-title{font-weight:700;margin-bottom:.3rem;display:flex;align-items:center;gap:.4rem}

.accordion{border:1px solid var(--border);border-radius:8px;margin:.8rem 0;overflow:hidden}
.accordion-q{padding:.8rem 1rem;background:#fbfbf9;cursor:pointer;font-weight:600;display:flex;justify-content:space-between;align-items:center;gap:.5rem}
.accordion-a{padding:0 1rem;max-height:0;overflow:hidden;transition:max-height .25s ease;background:var(--brand-light)}
.accordion.open .accordion-a{padding:.9rem 1rem}
.accordion-q i{transition:transform .2s}
.accordion.open .accordion-q i{transform:rotate(180deg)}

.slide-nav{display:flex;justify-content:space-between;margin-top:1.5rem}

/* ---------- Buttons / forms ---------- */
.btn{display:inline-flex;align-items:center;gap:.5rem;background:var(--brand);color:#fff;border:none;padding:.65rem 1.2rem;border-radius:8px;font-size:.95rem;cursor:pointer}
.btn:hover{background:var(--brand-dark)}
.btn.secondary{background:#fff;color:var(--brand);border:1px solid var(--brand)}
.btn.secondary:hover{background:var(--brand-light)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.form-group{margin-bottom:.9rem}
.form-group label{display:block;font-size:.85rem;font-weight:600;margin-bottom:.3rem}
.form-group input,.form-group select{width:100%;padding:.55rem .7rem;border:1px solid var(--border);border-radius:7px;font-size:.95rem}
.form-row{display:flex;gap:1rem}
.form-row>.form-group{flex:1}

.alert{padding:.7rem 1rem;border-radius:8px;margin-bottom:1rem;font-size:.9rem}
.alert-error{background:var(--danger-bg);color:var(--danger);border:1px solid #f5c2c0}
.alert-ok{background:var(--ok-bg);color:var(--ok);border:1px solid #b7e4c7}

/* ---------- Landing / auth ---------- */
.auth-wrap{max-width:520px;margin:2rem auto;width:100%}
.tabs{display:flex;border-bottom:1px solid var(--border);margin-bottom:1.2rem}
.tab{padding:.7rem 1.1rem;cursor:pointer;color:var(--muted);border-bottom:2px solid transparent;font-weight:600;font-size:.92rem}
.tab.active{color:var(--brand);border-color:var(--brand)}
.hero{text-align:center;padding:1.5rem 1rem 0}
.hero h1{color:var(--brand-dark);font-size:1.6rem}
.hero p{color:var(--muted)}

/* ---------- Progress ---------- */
.progress-bar{background:var(--border);border-radius:20px;height:10px;overflow:hidden}
.progress-bar-fill{background:var(--brand);height:100%}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem}
.stat-box{background:var(--brand-light);border-radius:8px;padding:1rem;text-align:center}
.stat-box .num{font-size:1.6rem;font-weight:700;color:var(--brand-dark)}
.stat-box .label{font-size:.78rem;color:var(--muted)}

table.data-table{width:100%;border-collapse:collapse;font-size:.9rem}
table.data-table th,table.data-table td{padding:.6rem .5rem;border-bottom:1px solid var(--border);text-align:left}
.badge{padding:.15rem .55rem;border-radius:20px;font-size:.75rem;font-weight:600}
.badge-pending{background:#fff4e0;color:#8a5a12}
.badge-approved{background:var(--ok-bg);color:var(--ok)}
.badge-rejected{background:var(--danger-bg);color:var(--danger)}

/* ---------- Toggle switches (4 poziomy testu) ---------- */
.switch-row{display:flex;align-items:center;gap:.9rem;margin:.8rem 0}
.switch{position:relative;width:52px;height:28px;flex-shrink:0}
.switch input{opacity:0;width:0;height:0}
.switch-slider{position:absolute;inset:0;background:#c8cfd3;border-radius:28px;cursor:pointer;transition:.2s}
.switch-slider:before{content:'';position:absolute;width:22px;height:22px;left:3px;top:3px;background:#fff;border-radius:50%;transition:.2s;box-shadow:0 1px 3px rgba(0,0,0,.3)}
.switch input:checked + .switch-slider{background:var(--brand)}
.switch input:checked + .switch-slider:before{transform:translateX(24px)}
.level-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:.7rem;margin-top:.8rem}
.level-card{border:2px solid var(--border);border-radius:10px;padding:.9rem .5rem;text-align:center;cursor:pointer}
.level-card.selected{border-color:var(--brand);background:var(--brand-light)}
.level-card .pct{font-size:1.3rem;font-weight:700;color:var(--brand-dark)}
.level-card .name{font-size:.78rem;color:var(--muted)}

/* ---------- Owner panel ---------- */
.owner-page{max-width:820px;margin:0 auto}
.owner-hero{display:flex;align-items:center;gap:1rem;margin-bottom:1.4rem}
.owner-hero-icon{width:54px;height:54px;border-radius:14px;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.4rem;flex-shrink:0;box-shadow:0 4px 10px rgba(15,92,77,.25)}
.owner-hero h2{margin:0;color:var(--brand-dark)}
.owner-hero p{margin:.15rem 0 0;color:var(--muted);font-size:.9rem}

.owner-card{border-radius:14px;margin-bottom:1.3rem;overflow:hidden;background:var(--card);box-shadow:0 1px 2px rgba(15,25,20,.04),0 8px 20px -12px rgba(15,25,20,.18);border:1px solid var(--border)}
.owner-card-head{display:flex;align-items:center;gap:.6rem;padding:.9rem 1.3rem;font-weight:700;font-size:1rem;color:#fff}
.owner-card-body{padding:1.2rem 1.3rem 1.4rem;background:var(--card)}
.owner-card-body>p{margin-top:0;color:var(--muted);font-size:.9rem;line-height:1.5}

.owner-card-invite .owner-card-head{background:linear-gradient(135deg,var(--brand),var(--brand-dark))}
.owner-card-settings .owner-card-head{background:linear-gradient(135deg,#3a7ca5,#2c5f80)}
.owner-card-employees .owner-card-head{background:linear-gradient(135deg,#6a4c93,#523a72)}
.owner-card-posters .owner-card-head{background:linear-gradient(135deg,var(--accent),#a5611f)}

.invite-code-box{background:var(--brand-light);border:2px dashed var(--brand);border-radius:10px;padding:.9rem 1rem;text-align:center;font-size:1.6rem;font-weight:700;color:var(--brand-dark);letter-spacing:.05em;margin:.6rem 0 1rem}
.owner-usage-row{display:flex;align-items:center;gap:.8rem}
.owner-usage-row .progress-bar{flex:1}
.owner-usage-row span{font-size:.85rem;color:var(--muted);white-space:nowrap}

.owner-save-row{display:flex;align-items:center;gap:.8rem;margin-top:1.1rem}
#settings-msg{font-size:.85rem;color:var(--ok);font-weight:600}

.poster-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:1rem;margin-top:.8rem}
.poster-card{border-radius:12px;padding:1.1rem 1rem;display:flex;flex-direction:column;align-items:flex-start;border:1px solid var(--border)}
.poster-card-icon{width:42px;height:42px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:#fff;margin-bottom:.7rem}
.poster-card-title{font-weight:700;font-size:.95rem;color:var(--text);margin-bottom:.3rem}
.poster-card-desc{font-size:.82rem;color:var(--muted);line-height:1.4;margin-bottom:.9rem;flex:1}
.poster-card-btn{width:100%;justify-content:center;padding:.5rem .6rem;font-size:.82rem}
.poster-green{background:var(--brand-light)}
.poster-green .poster-card-icon{background:var(--brand)}
.poster-orange{background:var(--warn-bg)}
.poster-orange .poster-card-icon{background:var(--accent)}
.poster-amber{background:#fdf2e3}
.poster-amber .poster-card-icon{background:#8a5a12}

@media (max-width:600px){
  .owner-hero{flex-direction:column;text-align:center}
}

/* ---------- Lena AI ---------- */
.lena-box{border:1px solid var(--border);border-radius:10px;padding:1rem;background:#fbfbf9}
.lena-msg{padding:.6rem .8rem;border-radius:10px;margin-bottom:.5rem;max-width:85%;font-size:.9rem;line-height:1.4}
.lena-msg.user{background:var(--brand-light);margin-left:auto}
.lena-msg.bot{background:#fff;border:1px solid var(--border)}
.lena-input-row{display:flex;gap:.5rem;margin-top:.7rem}
.lena-input-row input{flex:1}
.lena-typing{display:flex;align-items:center;min-height:1.2rem}
.lena-typing-dots{display:inline-flex;gap:4px}
.lena-typing-dots span{width:7px;height:7px;border-radius:50%;background:var(--muted);opacity:.5;animation:lena-dot-bounce 1.2s infinite ease-in-out}
.lena-typing-dots span:nth-child(2){animation-delay:.2s}
.lena-typing-dots span:nth-child(3){animation-delay:.4s}
@keyframes lena-dot-bounce{
  0%, 60%, 100% { transform: translateY(0); opacity:.5; }
  30% { transform: translateY(-4px); opacity:1; }
}

/* ---------- Responsive: mobile ---------- */
@media (max-width: 860px){
  .panel{position:fixed;top:0;bottom:0;left:0;width:82%;max-width:320px;z-index:30;margin-left:-100%;box-shadow:2px 0 12px rgba(0,0,0,.15)}
  .panel.open{margin-left:0}
  .panel.right{left:auto;right:0;margin-left:0;margin-right:-100%}
  .panel.right.open{margin-right:0}
  .main{padding:1rem .9rem 5rem}
  .form-row{flex-direction:column}
  .level-cards{grid-template-columns:repeat(2,1fr)}
  .bottom-nav{position:fixed;bottom:0;left:0;right:0;background:var(--card);border-top:1px solid var(--border);display:flex;z-index:25}
  .bottom-nav button{flex:1;background:none;border:none;padding:.6rem 0;color:var(--muted);font-size:1.15rem}
  .bottom-nav button.active{color:var(--brand)}
  .overlay{position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:29}
  .header-actions{gap:.35rem}
  .header-actions .icon-btn{padding:.5rem .55rem}
  .user-chip-name{display:none}
}
@media (min-width:861px){
  .bottom-nav{display:none}
}