/* ===== RESET & DESIGN TOKENS ===== */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#F7F7F7;--bg-card:#FFFFFF;--bg-hover:#F0F0F0;--bg-code:#F6F8FA;
  --border:#E5E5E5;--border-light:#EEEEEE;
  --text:#1F1F1F;--text-secondary:#555555;--text-muted:#636363;--heading:#111111;
  --accent:#111111;--accent-soft:rgba(17,17,17,0.04);
  --green:#10B981;--green-soft:rgba(16,185,129,0.07);
  --yellow:#E8A308;--yellow-soft:rgba(232,163,8,0.07);
  --red:#EF4444;--red-soft:rgba(239,68,68,0.07);
  --orange:#F97316;--orange-soft:rgba(249,115,22,0.07);
  --purple:#8B5CF6;--purple-soft:rgba(139,92,246,0.06);
  --blue:#3B82F6;--blue-soft:rgba(59,130,246,0.07);
  --sidebar-w:280px;--radius:10px;--radius-sm:8px;
  --shadow-sm:0 1px 3px rgba(0,0,0,0.04);--shadow-card:0 2px 12px rgba(0,0,0,0.03);--shadow-hover:0 8px 24px rgba(0,0,0,0.06);
  --ease:250ms ease;--ease-fast:150ms ease;
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  --mono:'JetBrains Mono','Cascadia Code','Fira Code',Consolas,monospace;
}
[data-theme="dark"]{
  --bg:#0F0F0F;--bg-card:#1A1A1A;--bg-hover:#222222;--bg-code:#1A1A1A;
  --border:#2A2A2A;--border-light:#333333;
  --text:#D4D4D4;--text-secondary:#999999;--text-muted:#777777;--heading:#F5F5F5;
  --accent:#FFFFFF;--accent-soft:rgba(255,255,255,0.04);
  --green:#34D399;--green-soft:rgba(52,211,153,0.1);
  --yellow:#FBBF24;--yellow-soft:rgba(251,191,36,0.1);
  --red:#F87171;--red-soft:rgba(248,113,113,0.1);
  --orange:#FB923C;--orange-soft:rgba(251,146,60,0.1);
  --purple:#A78BFA;--purple-soft:rgba(167,139,250,0.08);
  --blue:#60A5FA;--blue-soft:rgba(96,165,250,0.1);
  --shadow-sm:0 1px 3px rgba(0,0,0,0.2);--shadow-card:0 2px 12px rgba(0,0,0,0.15);--shadow-hover:0 8px 24px rgba(0,0,0,0.25);
}

/* ===== LAYOUT ===== */
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;margin:0;min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
#appShell{display:none}
#appShell.visible{display:flex;min-height:100vh}

/* ===== SIDEBAR ===== */
.sidebar{width:var(--sidebar-w);min-width:var(--sidebar-w);height:100vh;position:sticky;top:0;background:var(--bg-card);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden;z-index:100;transition:transform var(--ease);box-shadow:var(--shadow-sm)}
.sidebar-header{padding:20px 20px 16px;border-bottom:1px solid var(--border)}
.sidebar-logo{font-style:italic;font-weight:800;font-size:1.4rem;letter-spacing:-0.03em;color:var(--heading);line-height:1}
.sidebar-logo-sub{font-size:0.6rem;font-weight:500;letter-spacing:0.08em;text-transform:uppercase;color:var(--text-muted);margin-top:4px}
.sidebar-search{padding:10px 14px}
.sidebar-search input{width:100%;padding:8px 12px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg);color:var(--text);font-size:12px;font-family:var(--font);outline:none;transition:border-color var(--ease-fast)}
.sidebar-search input:focus{border-color:var(--accent)}
.sidebar-nav{flex:1;overflow-y:auto;padding:4px 0}
.sidebar-nav::-webkit-scrollbar{width:4px}
.sidebar-nav::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}
/* ===== NAV ICONS ===== */
.ni{width:15px;height:15px;flex-shrink:0;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;fill:none;stroke:currentColor}
.ni-sm{width:13px;height:13px}

/* ===== NAV MODULE SECTIONS ===== */
.nav-module{margin:0 0 2px;position:relative}
.nav-module-header{display:flex;align-items:center;gap:8px;padding:10px 14px;cursor:pointer;user-select:none;transition:all var(--ease-fast);border-radius:0}
.nav-module-header:hover{background:var(--bg-hover)}
.nav-module-header .ni{stroke:var(--text-muted);transition:stroke var(--ease-fast)}
.nav-module-header:hover .ni{stroke:var(--heading)}
.nav-module-label{flex:1;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--text-muted);transition:color var(--ease-fast)}
.nav-module-header:hover .nav-module-label{color:var(--heading)}
.nav-module-count{font-size:9px;padding:2px 6px;border-radius:10px;font-weight:700;min-width:18px;text-align:center;line-height:1}
.nav-module-chevron{width:10px;height:10px;stroke:var(--text-muted);stroke-width:2;fill:none;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s ease;opacity:.5}
.nav-module.collapsed .nav-module-chevron{transform:rotate(-90deg)}
.nav-module-body{overflow:hidden;transition:max-height .28s ease;max-height:2000px}
.nav-module.collapsed .nav-module-body{max-height:0}

/* Module color accents */
.nav-module[data-color="neutral"] .nav-module-count{background:var(--accent-soft);color:var(--text-muted)}
.nav-module[data-color="blue"] .nav-module-count{background:var(--blue-soft);color:var(--blue)}
.nav-module[data-color="blue"] .nav-module-header .ni{stroke:var(--blue)}
.nav-module[data-color="green"] .nav-module-count{background:var(--green-soft);color:var(--green)}
.nav-module[data-color="green"] .nav-module-header .ni{stroke:var(--green)}
.nav-module[data-color="purple"] .nav-module-count{background:var(--purple-soft);color:var(--purple)}
.nav-module[data-color="purple"] .nav-module-header .ni{stroke:var(--purple)}
.nav-module[data-color="orange"] .nav-module-count{background:var(--orange-soft);color:var(--orange)}
.nav-module[data-color="orange"] .nav-module-header .ni{stroke:var(--orange)}
.nav-module.locked-module .nav-module-header{cursor:default;opacity:.4}
.nav-module.locked-module .nav-module-header:hover{background:transparent}
.nav-module.locked-module .nav-module-label{font-style:italic}
.nav-module-tag{font-size:8px;font-weight:600;letter-spacing:.5px;text-transform:uppercase;margin-left:auto;color:var(--text-muted);opacity:.6}

/* ===== NAV SUB-HEADER (Teoria / Ćwiczenia / Narzędzia inside module) ===== */
.nav-subsection{margin:0}
.nav-subsection-header{display:flex;align-items:center;gap:6px;padding:7px 14px 5px;cursor:pointer;user-select:none;margin-top:2px}
.nav-subsection-header:hover .nav-sub-header-label{color:var(--text-secondary)}
.nav-sub-header-label{font-size:9px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);opacity:.6;transition:color var(--ease-fast)}
.nav-sub-header-line{flex:1;height:1px;background:var(--border)}
.nav-subsection-chevron{width:8px;height:8px;stroke:var(--text-muted);stroke-width:2;fill:none;stroke-linecap:round;stroke-linejoin:round;opacity:.4;transition:transform .2s ease}
.nav-subsection.collapsed .nav-subsection-chevron{transform:rotate(-90deg)}
.nav-subsection-body{overflow:hidden;transition:max-height .25s ease;max-height:600px}
.nav-subsection.collapsed .nav-subsection-body{max-height:0}
.nav-subsection-count{font-size:8px;font-weight:700;padding:1px 5px;border-radius:8px;background:var(--accent-soft);color:var(--text-muted);line-height:1.2}

/* ===== NAV SUBGROUPS (exercises) ===== */
.nav-subgroup{margin:2px 0 0;position:relative}
.nav-subgroup + .nav-subgroup{margin-top:2px}
.nav-subgroup + .nav-subgroup::before{content:'';display:block;margin:0 20px 2px 36px;border-top:1px solid var(--border-light)}
.nav-subgroup-title{display:flex;align-items:center;gap:7px;padding:6px 10px 6px 14px;font-size:12px;color:var(--text-secondary);cursor:pointer;user-select:none;font-weight:600;transition:all var(--ease-fast);border-radius:0;margin:0}
.nav-subgroup-title:hover{color:var(--heading);background:var(--bg-hover)}
.nav-subgroup-title .ni{stroke:var(--text-muted);transition:stroke var(--ease-fast)}
.nav-subgroup-title:hover .ni{stroke:var(--heading)}
.nav-subgroup-title .chevron{font-size:7px;margin-left:auto;opacity:.4;transition:transform .2s}
.nav-subgroup.collapsed .nav-subgroup-title .chevron{transform:rotate(-90deg)}
.nav-subgroup:not(.collapsed) .nav-subgroup-title .chevron{transform:rotate(0deg)}
.nav-subgroup-items{overflow:hidden;transition:max-height .2s ease;max-height:300px;border-left:2px solid var(--border-light);margin-left:26px;padding-left:0}
.nav-subgroup.collapsed .nav-subgroup-items{max-height:0}
.ex-num{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;border-radius:6px;font-size:10px;font-weight:800;line-height:1;flex-shrink:0;color:#fff}
.ex-num-1{background:var(--blue)}
.ex-num-2{background:var(--green)}
.ex-num-3{background:var(--orange)}
.ex-num-4{background:var(--purple)}

/* ===== NAV ITEMS ===== */
.nav-item{display:flex;align-items:center;gap:7px;padding:5px 12px 5px 14px;font-size:12.5px;color:var(--text-secondary);cursor:pointer;border-left:3px solid transparent;transition:all var(--ease-fast);text-decoration:none}
.nav-item .ni{stroke:var(--text-muted);transition:stroke var(--ease-fast)}
.nav-item:hover{background:var(--bg-hover);color:var(--heading)}
.nav-item:hover .ni{stroke:var(--heading)}
.nav-item.active{border-left-color:var(--accent);background:var(--accent-soft);color:var(--heading);font-weight:600}
.nav-item.active .ni{stroke:var(--heading)}
.nav-item .badge{margin-left:auto;font-size:9px;padding:1px 6px;border-radius:10px;background:var(--accent);color:var(--bg-card);font-weight:600}
.nav-subgroup .nav-item{padding-left:12px;font-size:11.5px;border-left:none}

/* ===== NAV DIVIDERS ===== */
.nav-divider{margin:6px 14px;border-top:1px solid var(--border)}
.nav-section-divider{margin:8px 0;position:relative}
.nav-section-divider::after{content:'';display:block;margin:0 16px;border-top:1px dashed var(--border)}

/* ===== SIDEBAR FOOTER ===== */
.sidebar-footer{padding:10px 14px;border-top:1px solid var(--border);display:flex;align-items:center;gap:8px}
.btn-logout{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border:1px solid var(--border);border-radius:8px;background:transparent;cursor:pointer;color:var(--text-muted);transition:all .2s ease;margin-left:auto;flex-shrink:0}
.btn-logout:hover{background:var(--red-soft,rgba(239,68,68,.1));color:#ef4444;border-color:#ef4444}

/* ===== THEME TOGGLE — pill switch ===== */
.theme-switch{position:relative;width:52px;height:28px;border-radius:14px;border:1px solid var(--border);background:var(--bg);cursor:pointer;transition:all .3s ease;flex-shrink:0}
.theme-switch::before{content:'';position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:var(--heading);transition:transform .3s ease;box-shadow:0 1px 3px rgba(0,0,0,.15)}
[data-theme="dark"] .theme-switch::before{transform:translateX(24px)}
.theme-switch .icon-sun,.theme-switch .icon-moon{position:absolute;top:50%;transform:translateY(-50%);font-size:11px;transition:opacity .2s}
.theme-switch .icon-sun{left:7px;opacity:1}
.theme-switch .icon-moon{right:7px;opacity:.3}
[data-theme="dark"] .theme-switch .icon-sun{opacity:.3}
[data-theme="dark"] .theme-switch .icon-moon{opacity:1}

/* ===== PDF BUTTON ===== */
.btn-pdf{display:flex;align-items:center;gap:5px;padding:6px 10px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg);color:var(--text-secondary);font-size:11px;font-family:var(--font);cursor:pointer;transition:all var(--ease-fast);white-space:nowrap}
.btn-pdf:hover{background:var(--bg-hover);color:var(--heading);border-color:var(--accent)}
.btn-pdf svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.btn-pdf-inline{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg-card);color:var(--text-secondary);font-size:13px;font-weight:600;font-family:var(--font);cursor:pointer;transition:all var(--ease-fast);margin:12px 0 4px;box-shadow:var(--shadow-sm)}
.btn-pdf-inline:hover{background:var(--accent);color:var(--bg-card);border-color:var(--accent);box-shadow:var(--shadow-hover)}
.btn-pdf-inline:hover svg{stroke:var(--bg-card)}
.btn-pdf-inline svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

@media print{.sidebar,.menu-toggle,.btn-pdf,.btn-pdf-inline,.copy-btn,.sidebar-footer,.step-check input{display:none!important}.main{max-width:100%;margin:0;padding:20px}.section{display:block!important;page-break-inside:avoid}.section h1{font-size:18pt}.section h2{font-size:14pt}pre[class*="language-"]{font-size:9pt;border:1px solid #ccc}}

/* ===== MAIN CONTENT ===== */
.main{flex:1;max-width:100%;margin:0;padding:32px 48px 120px}
.main h1{font-size:24px;font-weight:700;color:var(--heading);margin-bottom:8px;border-bottom:1px solid var(--border);padding-bottom:10px;letter-spacing:-0.02em}
.main h2{font-size:18px;font-weight:600;color:var(--heading);margin:28px 0 10px;letter-spacing:-0.01em}
.main h3{font-size:15px;font-weight:600;color:var(--heading);margin:20px 0 8px}
.main h4{font-size:12px;font-weight:600;color:var(--text-muted);margin:14px 0 6px;text-transform:uppercase;letter-spacing:.5px}
.main p,.main li{color:var(--text);font-size:14px;margin-bottom:6px}
.main ul,.main ol{padding-left:22px;margin-bottom:10px}
.main a{color:var(--accent);text-decoration:none}
.main hr{border:none;border-top:1px solid var(--border);margin:28px 0}
.main table{width:100%;border-collapse:collapse;margin:10px 0;font-size:12.5px}
.main th{background:var(--bg-hover);color:var(--heading);text-align:left;padding:8px 10px;border:1px solid var(--border);font-weight:600}
.main td{padding:7px 10px;border:1px solid var(--border);vertical-align:top}
.main code:not(pre code){background:var(--bg-hover);padding:1px 5px;border-radius:4px;font-family:var(--mono);font-size:12.5px;color:var(--accent);border:1px solid var(--border-light)}

/* ===== CODE BLOCKS ===== */
pre[class*="language-"]{background:var(--bg-code)!important;border:1px solid var(--border);border-radius:var(--radius);margin:10px 0;padding:14px;font-size:12.5px;overflow-x:auto;position:relative}
pre .copy-btn{position:absolute;top:6px;right:6px;padding:3px 10px;border-radius:6px;border:1px solid var(--border);background:var(--bg-card);color:var(--text-muted);font-size:10px;font-family:var(--font);cursor:pointer;opacity:0;transition:opacity .2s}
pre:hover .copy-btn{opacity:1}

/* ===== SECTIONS ===== */
.section{display:none;animation:fadeIn .25s ease}
.section.active{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}

/* ===== COLLAPSIBLE ===== */
.collapsible{margin:8px 0}
.collapsible-header{display:flex;align-items:center;gap:8px;padding:10px 14px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;font-size:13.5px;font-weight:600;color:var(--heading);transition:all var(--ease-fast);user-select:none;box-shadow:var(--shadow-sm)}
.collapsible-header:hover{background:var(--bg-hover)}
.collapsible-header::before{content:'▶';font-size:9px;transition:transform .2s;color:var(--text-muted)}
.collapsible.open .collapsible-header::before{transform:rotate(90deg)}
.collapsible-body{display:none;padding:14px;border:1px solid var(--border);border-top:none;border-radius:0 0 var(--radius-sm) var(--radius-sm);background:var(--bg)}
.collapsible.open .collapsible-body{display:block}

/* ===== STEP CARDS ===== */
.step-card{border:1px solid var(--border);border-radius:var(--radius);margin:14px 0;overflow:hidden;background:var(--bg-card);transition:border-color .2s;box-shadow:var(--shadow-sm)}
.step-card.done{border-color:var(--green)}
.step-header{display:flex;align-items:center;gap:10px;padding:12px 16px;background:var(--bg-hover);cursor:pointer;user-select:none;transition:background var(--ease-fast)}
.step-header:hover{background:var(--border-light)}
.step-number{width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;background:var(--accent);color:var(--bg-card);flex-shrink:0}
.step-card.done .step-number{background:var(--green)}
.step-title{flex:1;font-size:14px;font-weight:600;color:var(--heading)}
.step-toggle{font-size:11px;color:var(--text-muted);transition:transform .2s}
.step-card.open .step-toggle{transform:rotate(180deg)}
.step-body{display:none;padding:16px;border-top:1px solid var(--border)}
.step-card.open .step-body{display:block}
.step-check{display:flex;align-items:center;gap:8px;margin-top:12px;padding:8px 12px;background:var(--bg);border-radius:var(--radius-sm);cursor:pointer;font-size:12px}
.step-check input{accent-color:var(--green);width:15px;height:15px}

/* ===== INFO BOXES ===== */
.info-box{padding:10px 14px;border-radius:var(--radius-sm);margin:10px 0;font-size:13px;border-left:4px solid}
.info-box.tip{background:var(--blue-soft);border-color:var(--blue)}
.info-box.warn{background:var(--yellow-soft);border-color:var(--yellow)}
.info-box.error{background:var(--red-soft);border-color:var(--red)}
.info-box.success{background:var(--green-soft);border-color:var(--green)}
.info-box strong{display:block;margin-bottom:3px;color:var(--heading)}

/* ===== TEACHER DIALOGUE BOXES ===== */
.teacher-box{padding:14px 16px;border-radius:var(--radius);margin:12px 0;font-size:13px;border:1px solid;position:relative}
.teacher-box::before{position:absolute;top:-10px;left:14px;padding:0 8px;font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;border-radius:4px;background:var(--bg)}
.step-body .teacher-box::before{background:var(--bg-card)}
.teacher-say{border-color:var(--green);background:var(--green-soft)}
.teacher-say::before{content:'🗣 POWIEDZ';color:var(--green)}
.teacher-ask{border-color:var(--purple);background:var(--purple-soft)}
.teacher-ask::before{content:'❓ ZAPYTAJ';color:var(--purple)}
.teacher-react{border-color:var(--orange);background:var(--orange-soft)}
.teacher-react::before{content:'⚡ REAGUJ';color:var(--orange)}
.teacher-tip{border-color:var(--yellow);background:var(--yellow-soft)}
.teacher-tip::before{content:'💡 WSKAZÓWKA';color:var(--yellow)}
.teacher-box .dialog{font-style:italic;color:var(--heading);margin:4px 0;padding-left:10px;border-left:2px solid var(--border)}
.teacher-box table{margin:6px 0;font-size:12px}
.teacher-box th{font-size:11px}

/* ===== PROGRESS BAR ===== */
.progress-bar-wrap{margin:14px 0;background:var(--bg-hover);border-radius:20px;height:6px;overflow:hidden;border:1px solid var(--border)}
.progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--green));border-radius:20px;transition:width .5s ease}
.progress-text{font-size:11px;color:var(--text-muted);margin-top:3px;text-align:right}

/* ===== CARD GRID ===== */
.cheat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:10px;margin:10px 0}
.cheat-card{padding:14px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-card);cursor:pointer;transition:all .2s;box-shadow:var(--shadow-sm)}
.cheat-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-1px)}
.cheat-card h4{margin:0 0 4px;font-size:12px;color:var(--heading)}
.cheat-card pre{margin:4px 0 0;font-size:11.5px;padding:8px!important}

/* ===== REQ TABLE ===== */
.req-table td:first-child{font-weight:600;white-space:nowrap;width:28%}
.req-status{display:inline-block;padding:1px 7px;border-radius:12px;font-size:10px;font-weight:600}
.req-status.ok{background:var(--green-soft);color:var(--green)}

/* ===== EXAM INSTRUCTION ===== */
.exam-instruction{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin:14px 0;font-size:13px;line-height:1.7;box-shadow:var(--shadow-sm)}
.exam-instruction h3{color:var(--text-muted);font-size:13px;font-weight:700;margin:16px 0 6px;border-bottom:1px solid var(--border);padding-bottom:4px;text-transform:uppercase;letter-spacing:.3px}
.exam-instruction ul{margin:6px 0 10px 18px}
.exam-instruction li{margin:3px 0}

/* ===== SKILL TAGS ===== */
.skill-tag{display:inline-block;padding:2px 8px;border-radius:12px;font-size:10px;font-weight:600;margin:2px}
.skill-tag.new{background:var(--green-soft);color:var(--green)}
.skill-tag.repeat{background:var(--blue-soft);color:var(--blue)}

/* ===== KNOWLEDGE BASE CARD ===== */
.kb-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px;margin:16px 0;box-shadow:var(--shadow-card);position:relative;overflow:hidden}
.kb-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),var(--green))}
.kb-card h3{margin:0 0 12px;font-size:15px;font-weight:700;color:var(--heading)}
.kb-card table{margin:0}
.kb-card table td:first-child{font-weight:600;color:var(--heading)}
.kb-tools{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:14px}
.kb-tools .cheat-card{margin:0}
.kb-skills{margin-top:20px}
.kb-skills summary{cursor:pointer;font-size:14px;font-weight:600;color:var(--heading);padding:8px 0;user-select:none}
.kb-skills summary:hover{color:var(--accent)}
.kb-skills[open] summary::after{content:'  ▾'}
.kb-skills:not([open]) summary::after{content:'  ▸'}

/* ===== WARMUP (Rozgrzewka) ===== */
.warmup-box{background:linear-gradient(135deg,rgba(59,130,246,.06),rgba(139,92,246,.06));border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin:16px 0}
.warmup-box h2{font-size:18px;margin:0 0 16px;display:flex;align-items:center;gap:8px}
.warmup-q{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 16px;margin:8px 0;cursor:pointer;transition:all var(--ease-fast)}
.warmup-q:hover{border-color:var(--accent);box-shadow:var(--shadow-sm)}
.warmup-q .wq-question{font-weight:600;font-size:13px;color:var(--heading);margin:0}
.warmup-q .wq-answer{display:none;margin-top:10px;padding-top:10px;border-top:1px dashed var(--border);font-size:12.5px;color:var(--text-secondary);line-height:1.5}
.warmup-q.open .wq-answer{display:block}
.warmup-q .wq-tag{display:inline-block;font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;padding:2px 6px;border-radius:4px;margin-bottom:6px}
.warmup-q .wq-tag.recall{background:rgba(59,130,246,.12);color:#3b82f6}
.warmup-q .wq-tag.concept{background:rgba(16,185,129,.12);color:#10b981}
.warmup-q .wq-tag.code{background:rgba(245,158,11,.12);color:#f59e0b}

/* ===== QUIZ (Sprawdzian) ===== */
.quiz-container{background:var(--bg-card);border:2px solid var(--border);border-radius:var(--radius);padding:24px;margin:16px 0}
.quiz-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;flex-wrap:wrap;gap:10px}
.quiz-header h2{margin:0;font-size:18px}
.quiz-timer{font-family:'JetBrains Mono',Consolas,monospace;font-size:20px;font-weight:700;color:var(--accent);background:var(--bg);padding:6px 14px;border-radius:var(--radius-sm);border:1px solid var(--border)}
.quiz-timer.warning{color:#ef4444;border-color:#ef4444;animation:pulse 1s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}
.quiz-q{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;margin:12px 0}
.quiz-q .qq-num{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:50%;background:var(--accent);color:#fff;font-size:11px;font-weight:700;margin-right:8px}
.quiz-q .qq-text{font-weight:600;font-size:13px;color:var(--heading);margin:0 0 10px;display:inline}
.quiz-q pre{margin:8px 0}
.quiz-option{display:flex;align-items:flex-start;gap:8px;padding:8px 12px;margin:4px 0;border-radius:var(--radius-sm);border:1px solid transparent;cursor:pointer;font-size:12.5px;transition:all var(--ease-fast)}
.quiz-option:hover{background:var(--bg-hover);border-color:var(--border)}
.quiz-option input[type="radio"]{margin-top:2px;accent-color:var(--accent)}
.quiz-option.correct{background:rgba(16,185,129,.1);border-color:#10b981}
.quiz-option.wrong{background:rgba(239,68,68,.08);border-color:#ef4444}
.quiz-actions{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}
.quiz-btn{padding:10px 20px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--accent);color:#fff;font-size:13px;font-weight:600;font-family:var(--font);cursor:pointer;transition:all var(--ease-fast)}
.quiz-btn:hover{opacity:.9;box-shadow:var(--shadow-hover)}
.quiz-btn.secondary{background:var(--bg);color:var(--text);border-color:var(--border)}
.quiz-btn.secondary:hover{background:var(--bg-hover)}
.quiz-btn.danger{background:#ef4444;color:#fff;border-color:#ef4444}
.quiz-btn.danger:hover{background:#dc2626}
.btn-reset-section{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg);color:var(--text-muted);font-size:12px;font-weight:600;font-family:var(--font);cursor:pointer;transition:all var(--ease-fast);margin-top:12px}
.btn-reset-section:hover{background:#ef4444;color:#fff;border-color:#ef4444}
.quiz-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:12px}
.quiz-result{background:var(--bg);border:2px solid var(--border);border-radius:var(--radius-sm);padding:20px;margin-top:16px;text-align:center}
.quiz-result .qr-score{font-size:36px;font-weight:800;color:var(--accent)}
.quiz-result .qr-label{font-size:12px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px}
.quiz-result.pass{border-color:#10b981}.quiz-result.pass .qr-score{color:#10b981}
.quiz-result.fail{border-color:#ef4444}.quiz-result.fail .qr-score{color:#ef4444}

/* ===== THEORY TASKS ===== */
.theory-task{background:var(--bg);border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:var(--radius-sm);padding:16px;margin:12px 0}
.theory-task h4{font-size:12px;text-transform:uppercase;letter-spacing:.5px;color:var(--accent);margin:0 0 8px}
.theory-task-solution{display:none;margin-top:12px;padding-top:12px;border-top:1px dashed var(--border)}
.theory-task.open .theory-task-solution{display:block}
.theory-task .tt-toggle{font-size:11px;color:var(--text-muted);cursor:pointer;display:inline-flex;align-items:center;gap:4px;margin-top:8px;padding:4px 8px;border-radius:4px;border:1px solid var(--border);background:var(--bg-card);transition:all var(--ease-fast)}
.theory-task .tt-toggle:hover{color:var(--accent);border-color:var(--accent)}

/* ===== RESPONSIVE ===== */
.menu-toggle{display:none;position:fixed;top:12px;left:12px;z-index:200;width:36px;height:36px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg-card);color:var(--heading);font-size:16px;cursor:pointer;align-items:center;justify-content:center;box-shadow:var(--shadow-sm)}
@media(max-width:768px){.sidebar{position:fixed;transform:translateX(-100%);height:100vh}.sidebar.show{transform:translateX(0)}.menu-toggle{display:flex}.main{padding:24px 16px 80px}.main h1{font-size:20px}}

/* ===== LOGIN SCREEN ===== */
.login-overlay{position:fixed;inset:0;z-index:9999;background:#0a0a0a;display:flex;align-items:center;justify-content:center;transition:opacity .5s ease,visibility .5s ease}
.login-overlay.hidden{opacity:0;visibility:hidden;pointer-events:none}
.login-card{width:380px;background:#141414;border:1px solid #2a2a2a;border-radius:16px;padding:48px 40px 40px;box-shadow:0 24px 80px rgba(0,0,0,.6);position:relative;overflow:hidden}
.login-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#555,#888,#555)}
.login-brand{text-align:center;margin-bottom:36px}
.login-brand-logo{font-family:var(--font);font-size:32px;font-weight:800;font-style:italic;color:#fff;letter-spacing:-1px}
.login-brand-sub{font-size:11px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:#555;margin-top:6px}
.login-field{position:relative;margin-bottom:20px}
.login-field label{display:block;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.8px;color:#666;margin-bottom:8px;font-family:var(--font)}
.login-field input{width:100%;padding:12px 16px;background:#1a1a1a;border:1px solid #333;border-radius:10px;color:#eee;font-size:14px;font-family:var(--font);outline:none;transition:border-color .2s ease,box-shadow .2s ease}
.login-field input:focus{border-color:#3B82F6;box-shadow:0 0 0 3px rgba(59,130,246,.15)}
.login-field input::placeholder{color:#444}
.login-btn{width:100%;padding:13px;background:#fff;color:#0a0a0a;border:none;border-radius:10px;font-size:14px;font-weight:700;font-family:var(--font);cursor:pointer;transition:all .2s ease;margin-top:8px;letter-spacing:.3px}
.login-btn:hover{background:#e5e5e5;transform:translateY(-1px);box-shadow:0 4px 16px rgba(255,255,255,.15)}
.login-btn:active{transform:translateY(0)}
.login-error{text-align:center;font-size:12px;color:#EF4444;margin-top:14px;min-height:18px;font-weight:500;opacity:0;transition:opacity .2s}
.login-error.visible{opacity:1}
.login-particles{position:absolute;inset:0;overflow:hidden;pointer-events:none;z-index:-1}
.login-particle{position:absolute;width:2px;height:2px;border-radius:50%;background:rgba(255,255,255,.06);animation:floatParticle linear infinite}
@keyframes floatParticle{0%{transform:translateY(100vh) scale(0);opacity:0}10%{opacity:1}90%{opacity:1}100%{transform:translateY(-10vh) scale(1);opacity:0}}

/* ===== PAGE LOADER ===== */
.page-loader{position:fixed;inset:0;z-index:8000;display:flex;align-items:center;justify-content:center;background:var(--bg);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .15s ease,visibility .15s ease}
.page-loader.active{opacity:1;visibility:visible;pointer-events:auto}
.loader-spinner{position:relative;width:48px;height:48px}
.loader-ring{position:absolute;inset:0;border-radius:50%;border:3px solid transparent}
.loader-ring:nth-child(1){border-top-color:var(--heading);animation:loaderSpin .8s ease-in-out infinite}
.loader-ring:nth-child(2){border-right-color:var(--text-secondary);animation:loaderSpin .8s ease-in-out infinite .15s;inset:4px}
.loader-ring:nth-child(3){border-bottom-color:var(--text-muted);animation:loaderSpin .8s ease-in-out infinite .3s;inset:8px}
.loader-dot{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:6px;height:6px;border-radius:50%;background:var(--heading);animation:loaderPulse .8s ease-in-out infinite alternate}
@keyframes loaderSpin{0%{transform:rotate(0deg)}100%{transform:rotate(360deg)}}
@keyframes loaderPulse{0%{transform:translate(-50%,-50%) scale(.6);opacity:.4}100%{transform:translate(-50%,-50%) scale(1.2);opacity:1}}