/* ====================================================================
   Niezależna kopia wyglądu interfejsu aplikacji kursowej (na potrzeby
   samodzielnego dema animacji). Ten plik nie jest w żaden sposób
   dołączany przez aplikację w Lenavio/LENAvio/public_html — to osobna,
   wolnostojąca kopia reguł wizualnych, tak aby demo wyglądało
   identycznie, pozostając całkowicie odseparowane od kodu aplikacji.
   ==================================================================== */
@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root{
  --brand:#a47864;
  --brand-dark:#7c5a49;
  --brand-light:#f2e7e1;
  --accent:#c97a2b;
  --accent-text:var(--brand-dark);
  --accent-tint:var(--brand-light);
  --bg:#f3f3f3;
  --card:#ffffff;
  --text:#1f1f1f;
  --muted:#6e7681;
  --border:#e2e2e2;
  --hover:rgba(0,0,0,.045);
  --code-bg:#f6f6f6;
  --danger:#a3271e;
  --danger-bg:#fdecea;
  --ok:#1e6b3a;
  --ok-bg:#e7f6ec;
  --warn-bg:#fff4e0;
  --warn-border:#f0c987;
  --warn-text:#8a5a12;
  --def-bg:#eaf1fb;
  --def-border:#a9c6ec;
  --tip-bg:#eef7ec;
  --tip-border:#a9d6a5;
  --example-bg:#f5f0fa;
  --example-border:#c9b3e6;
  --chip-blue-bg:#e7effa; --chip-blue-text:#2c5f80;
  --chip-purple-bg:#f1eaf9; --chip-purple-text:#6a4c93;
  --chip-orange-bg:#fbeee0;
  --radius-sm:6px;
  --radius:9px;
  --radius-lg:13px;
  --font-display:'Manrope','Segoe UI',system-ui,sans-serif;
  --font-mono:'JetBrains Mono','Cascadia Code','Fira Code',Consolas,monospace;
  --shadow-xs:0 1px 2px rgba(16,24,32,.05);
  --shadow-sm:0 1px 2px rgba(16,24,32,.05);
  --shadow-md:0 6px 16px rgba(16,24,32,.12);
  --shadow-lg:0 12px 32px rgba(16,24,32,.16);
}

:root[data-theme="dark"]{
  --brand:#a47864;
  --accent-text:color-mix(in srgb, var(--brand) 62%, white);
  --accent-tint:color-mix(in srgb, var(--brand) 16%, var(--card));
  --bg:#1e1e1e;
  --card:#252526;
  --text:#cccccc;
  --muted:#8f8f8f;
  --border:#3c3c3c;
  --hover:rgba(255,255,255,.07);
  --code-bg:#181818;
  --danger:#f14c4c;
  --danger-bg:rgba(241,76,76,.14);
  --ok:#4ec9b0;
  --ok-bg:rgba(78,201,176,.14);
  --warn-bg:rgba(204,167,0,.16);
  --warn-border:rgba(204,167,0,.4);
  --warn-text:#e0b23d;
  --def-bg:rgba(86,156,214,.16);
  --def-border:rgba(86,156,214,.4);
  --tip-bg:rgba(78,201,176,.14);
  --tip-border:rgba(78,201,176,.4);
  --example-bg:rgba(197,134,192,.14);
  --example-border:rgba(197,134,192,.4);
  --chip-blue-bg:rgba(86,156,214,.18); --chip-blue-text:#8ab4e0;
  --chip-purple-bg:rgba(197,134,192,.18); --chip-purple-text:#d9a8d4;
  --chip-orange-bg:rgba(201,122,43,.2);
  --shadow-xs:0 1px 2px rgba(0,0,0,.3);
  --shadow-sm:0 1px 2px rgba(0,0,0,.3);
  --shadow-md:0 6px 16px rgba(0,0,0,.4);
  --shadow-lg:0 14px 36px rgba(0,0,0,.5);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]):not([data-theme="dark"]){
    --accent-text:color-mix(in srgb, var(--brand) 62%, white);
    --accent-tint:color-mix(in srgb, var(--brand) 16%, var(--card));
    --bg:#1e1e1e; --card:#252526; --text:#cccccc; --muted:#8f8f8f; --border:#3c3c3c;
    --hover:rgba(255,255,255,.07); --code-bg:#181818;
    --danger:#f14c4c; --danger-bg:rgba(241,76,76,.14);
    --ok:#4ec9b0; --ok-bg:rgba(78,201,176,.14);
    --warn-bg:rgba(204,167,0,.16); --warn-border:rgba(204,167,0,.4); --warn-text:#e0b23d;
    --def-bg:rgba(86,156,214,.16); --def-border:rgba(86,156,214,.4);
    --tip-bg:rgba(78,201,176,.14); --tip-border:rgba(78,201,176,.4);
    --example-bg:rgba(197,134,192,.14); --example-border:rgba(197,134,192,.4);
    --chip-blue-bg:rgba(86,156,214,.18); --chip-blue-text:#8ab4e0;
    --chip-purple-bg:rgba(197,134,192,.18); --chip-purple-text:#d9a8d4;
    --chip-orange-bg:rgba(201,122,43,.2);
    --shadow-xs:0 1px 2px rgba(0,0,0,.3); --shadow-sm:0 1px 2px rgba(0,0,0,.3);
    --shadow-md:0 6px 16px rgba(0,0,0,.4); --shadow-lg:0 14px 36px rgba(0,0,0,.5);
  }
}

*{box-sizing:border-box}
html,body{overflow-x:hidden;max-width:100%}
body{margin:0;font-family:'Manrope','Segoe UI',system-ui,Arial,sans-serif;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;background:var(--bg);color:var(--text);line-height:1.55;transition:background-color .2s ease,color .2s ease}
h1,h2,h3,h4{font-family:var(--font-display);letter-spacing:-.015em;line-height:1.2}
a{color:var(--brand);text-decoration:none}
button{font-family:inherit}
code{background:var(--code-bg);border:1px solid var(--border);padding:.1rem .35rem;border-radius:4px;font-size:.85em;font-family:var(--font-mono)}
.boot-loader{display:flex;align-items:center;justify-content:center;height:100vh;font-size:1.1rem;color:var(--muted);gap:.5rem;font-family:var(--font-mono)}

a:focus-visible,button:focus-visible,.btn:focus-visible,.icon-btn:focus-visible,
input:focus-visible,select:focus-visible,textarea:focus-visible,
.tab:focus-visible,.toc-lesson:focus-visible,.level-card:focus-visible,
.course-select-card:focus-visible,.lena-tile:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  border-radius:4px;
}
input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline-offset:0;
  border-color:var(--brand);
}

.theme-toggle-btn{position:relative}
.theme-toggle-btn .theme-icon-sun{display:none}
.theme-toggle-btn .theme-icon-moon{display:inline-block}
:root[data-theme="dark"] .theme-toggle-btn .theme-icon-sun{display:inline-block}
:root[data-theme="dark"] .theme-toggle-btn .theme-icon-moon{display:none}

.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 1.4rem;position:sticky;top:0;z-index:20;gap:.6rem;transition:background-color .2s ease,border-color .2s ease}
.brand{display:flex;align-items:center;gap:.65rem;font-weight:700;color:var(--brand);font-size:1.15rem;min-width:0;overflow:hidden;font-family:var(--font-display)}
.brand-mark{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:var(--radius-sm);background:var(--brand);color:#fff;font-size:.9rem;flex-shrink:0;overflow:hidden}
.brand-mark img{width:100%;height:100%;object-fit:contain}
.brand-text{font-family:var(--font-display);font-weight:800;font-size:1.12rem;color:var(--text);letter-spacing:-.02em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand-sub{display:block;font-weight:600;font-size:.6rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-top:1px;font-family:var(--font-mono)}
.brand-accent{color:var(--brand)}
.header-actions{display:flex;align-items:center;gap:.3rem;flex-shrink:0}
.icon-btn{background:none;border:1px solid transparent;border-radius:var(--radius-sm);padding:.5rem .65rem;cursor:pointer;color:var(--muted);font-size:1rem;transition:background .15s ease,color .15s ease}
.icon-btn:hover{background:var(--hover);color:var(--text)}
.user-chip{display:flex;align-items:center;gap:.5rem;font-size:.88rem;color:var(--text);font-weight:600}

.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,margin-right .2s ease,background-color .2s ease,border-color .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:2rem 2.2rem;overflow-y:auto}
.footer{background:var(--brand);border-top:none;text-align:center;padding:.5rem 1rem;font-size:.76rem;color:#fff;font-family:var(--font-mono)}
.powered-by{display:inline-flex;align-items:center;gap:.35rem;background:rgba(255,255,255,.16);color:#fff;font-weight:600;font-size:.7rem;padding:.22rem .65rem .22rem .55rem;border-radius:20px;vertical-align:middle}
.powered-by i{color:#fff;font-size:.66rem}
.powered-by a{color:inherit;text-decoration:none;font-weight:700}
.powered-by a:hover{text-decoration:underline}

.toc h3{font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);padding:1.1rem 1.1rem .4rem;font-family:var(--font-mono)}
.toc-module{border-bottom:1px solid var(--border)}
.toc-module>.toc-module-title{padding:.75rem 1.1rem;font-weight:700;font-size:.87rem;cursor:pointer;display:flex;justify-content:space-between;align-items:center;color:var(--text)}
.toc-lesson{padding:.55rem 1.1rem .55rem 2.1rem;font-size:.85rem;cursor:pointer;color:var(--muted);display:flex;align-items:center;gap:.5rem;border-left:2px solid transparent;transition:background .12s ease,color .12s ease}
.toc-lesson:hover{background:var(--hover);color:var(--text)}
.toc-lesson.active{background:var(--accent-tint);color:var(--accent-text);font-weight:700;border-left-color:var(--brand)}
.toc-lesson.done i.fa-circle-check{color:var(--brand)}
.toc-lesson.locked{color:var(--muted);opacity:.55;cursor:not-allowed}
.toc-lesson.locked:hover{background:none}

.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.4rem;margin-bottom:1.1rem;box-shadow:var(--shadow-xs);transition:background-color .2s ease,border-color .2s ease}

.slide h2{color:var(--text);margin-top:0;font-family:var(--font-display);letter-spacing:-.02em;font-weight:800}
.block{border-radius:var(--radius-sm);padding:1rem 1.2rem;margin:1rem 0;line-height:1.6}
.block-content{white-space:pre-line}
.block-text{background:var(--code-bg);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:.35rem;display:flex;align-items:center;gap:.45rem}

.accordion{border:1px solid var(--border);border-radius:var(--radius-sm);margin:.9rem 0;overflow:hidden}
.accordion-q{padding:.85rem 1.05rem;background:var(--card);cursor:pointer;font-weight:600;display:flex;justify-content:space-between;align-items:center;gap:.5rem}
.accordion-a{padding:0 1.05rem;max-height:0;overflow:hidden;transition:max-height .25s ease;background:var(--code-bg)}
.accordion.open .accordion-a{padding:1rem 1.05rem}
.accordion-q i{transition:transform .2s;color:var(--muted)}
.accordion.open .accordion-q i{transform:rotate(180deg)}

.slide-nav{display:flex;justify-content:space-between;margin-top:1.6rem}

.btn{display:inline-flex;align-items:center;gap:.5rem;background:var(--brand);color:#fff;border:none;padding:.62rem 1.15rem;border-radius:var(--radius-sm);font-size:.9rem;font-weight:600;cursor:pointer;transition:background .15s ease,transform .1s ease,box-shadow .15s ease}
.btn:hover{background:var(--brand-dark)}
.btn:active{transform:translateY(1px)}
.btn.secondary{background:transparent;color:var(--text);border:1px solid var(--border)}
.btn.secondary:hover{background:var(--hover);border-color:var(--muted)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn.danger{background:var(--danger)}
.btn.danger:hover{background:var(--danger)}
.btn-sm{padding:.4rem .75rem;font-size:.8rem;text-decoration:none}
.form-group{margin-bottom:1rem}
.form-group label{display:block;font-size:.78rem;font-weight:600;margin-bottom:.35rem;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:.6rem .75rem;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:.94rem;font-family:inherit;box-sizing:border-box;resize:vertical;transition:border-color .15s ease,box-shadow .15s ease;background:var(--code-bg);color:var(--text)}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--accent-tint);outline:none}
.form-row{display:flex;gap:1rem}
.form-row>.form-group{flex:1}

.alert{padding:.7rem 1rem;border-radius:var(--radius-sm);margin-bottom:1rem;font-size:.86rem;font-weight:500}
.alert-error{background:var(--danger-bg);color:var(--danger);border:1px solid var(--danger)}
.alert-ok{background:var(--ok-bg);color:var(--ok);border:1px solid var(--ok)}

.landing-shell .header{background:transparent;border-bottom:none;position:absolute;width:100%}
.landing-shell .header .icon-btn{color:rgba(255,255,255,.85)}
.landing-shell .header .icon-btn:hover{background:rgba(255,255,255,.14);color:#fff}
.landing-shell .header .brand-text{color:#fff}
.landing-shell .header .brand-sub{color:rgba(255,255,255,.6)}
.landing-split{flex:1;display:grid;grid-template-columns:1.05fr 1fr;min-height:100vh}
.landing-brand-panel{
  position:relative;display:flex;flex-direction:column;justify-content:center;
  padding:6rem 4rem;color:#fff;overflow:hidden;
  background:radial-gradient(120% 140% at 15% 15%, #3a291f 0%, #1e1e1e 65%, #181818 100%);
}
.landing-brand-panel::before{
  content:'';position:absolute;inset:0;opacity:.5;
  background-image:radial-gradient(circle at 1px 1px, rgba(164,120,100,.4) 1px, transparent 0);
  background-size:26px 26px;
  mask-image:radial-gradient(ellipse 70% 60% at 30% 30%, black 0%, transparent 70%);
}
.landing-brand-content{position:relative;max-width:440px}
.landing-badge{display:inline-flex;align-items:center;gap:.5rem;background:rgba(164,120,100,.22);border:1px solid rgba(164,120,100,.5);color:#dbb8a4;font-weight:600;font-size:.74rem;padding:.35rem .8rem;border-radius:var(--radius-sm);margin-bottom:1.6rem;font-family:var(--font-mono);letter-spacing:.02em}
.landing-brand-content .hero{text-align:left;padding:0}
.landing-brand-content .hero h1{color:#fff;font-size:clamp(2.2rem,3.4vw,3rem);font-weight:800}
.landing-brand-content .hero-slogan{color:rgba(255,255,255,.55);font-family:var(--font-mono);text-transform:none;letter-spacing:.02em}
.landing-brand-content .hero p{color:rgba(255,255,255,.72);font-size:1.05rem;margin-top:.9rem;line-height:1.6}
.landing-points{list-style:none;margin:2.2rem 0 0;padding:0;display:flex;flex-direction:column;gap:.9rem}
.landing-points li{display:flex;align-items:center;gap:.75rem;font-size:.95rem;color:rgba(255,255,255,.9)}
.landing-points li i{display:flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:var(--radius-sm);background:rgba(164,120,100,.24);color:#dbb8a4;flex-shrink:0}
.landing-board-link{display:inline-flex;align-items:center;gap:.5rem;margin-top:2.4rem;color:#fff;font-weight:600;font-size:.9rem;border-bottom:1px solid rgba(255,255,255,.4);padding-bottom:2px}

.landing-form-panel{display:flex;align-items:center;justify-content:center;padding:2.5rem 2rem;background:var(--bg)}
.auth-wrap{max-width:420px;margin:0;width:100%}
.auth-wrap.card{border:none;box-shadow:none;padding:0;background:transparent}
.tabs{display:flex;gap:1.6rem;border-bottom:1px solid var(--border);margin-bottom:1.6rem;overflow-x:auto}
.tab{padding:0 0 .85rem;cursor:pointer;color:var(--muted);border-bottom:2px solid transparent;font-weight:600;font-size:.92rem;white-space:nowrap;transition:color .15s ease,border-color .15s ease}
.tab:hover{color:var(--text)}
.tab.active{color:var(--accent-text);border-color:var(--brand)}
.hero{text-align:center;padding:1.5rem 1rem 0}
.hero h1{color:var(--text);font-size:2.2rem;letter-spacing:-.03em;font-family:var(--font-display);font-weight:800}
.hero-slogan{display:block;font-weight:600;font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-top:.4rem}
.hero p{color:var(--muted);margin-top:.6rem}
.hero-tags{display:flex;justify-content:center;flex-wrap:wrap;gap:.6rem;margin-top:1rem}
.hero-tag{display:inline-flex;align-items:center;gap:.4rem;background:var(--accent-tint);color:var(--accent-text);font-weight:600;font-size:.82rem;padding:.4rem .85rem;border-radius:var(--radius-sm)}
.hero-tag i{color:var(--brand);font-size:.8rem}

@media (max-width:900px){
  .landing-split{grid-template-columns:1fr}
  .landing-brand-panel{padding:7.5rem 2rem 3rem;text-align:left}
  .landing-form-panel{padding:2rem 1.3rem 3rem}
}

.progress-bar{background:var(--border);border-radius:20px;height:8px;overflow:hidden}
.progress-bar-fill{background:var(--brand);height:100%;border-radius:20px;transition:width .4s ease}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:1rem}
.stat-box{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.1rem 1rem;text-align:left;transition:background-color .2s ease,border-color .2s ease}
.stat-box .num{font-size:1.75rem;font-weight:700;color:var(--text);font-family:var(--font-mono);letter-spacing:-.01em}
.stat-box .label{font-size:.76rem;color:var(--muted);font-weight:500;margin-top:.2rem}

.badge{padding:.2rem .55rem;border-radius:4px;font-size:.7rem;font-weight:700;font-family:var(--font-mono)}
.badge-pending{background:var(--warn-bg);color:var(--warn-text)}
.badge-approved{background:var(--ok-bg);color:var(--ok)}
.badge-rejected{background:var(--danger-bg);color:var(--danger)}

.course-select-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;margin-top:1rem}
.course-select-card{cursor:pointer;padding:1.4rem;transition:box-shadow .15s ease,border-color .15s ease,transform .15s ease}
.course-select-card:hover{border-color:var(--brand);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.course-select-card h3{margin:0 0 .4rem;font-size:1.05rem;color:var(--text)}
.course-select-card p{margin:0 0 .9rem;font-size:.85rem;color:var(--muted);line-height:1.45}

.lena-fab{
  position:fixed;right:1.2rem;bottom:1.2rem;width:58px;height:58px;border-radius:50%;
  background:var(--brand);border:3px solid var(--card);padding:0;cursor:pointer;z-index:40;
  box-shadow:var(--shadow-lg);display:flex;align-items:center;justify-content:center;
  overflow:hidden;transition:transform .15s ease;
}
.lena-fab:hover{transform:scale(1.06)}
.lena-fab i{color:#fff;font-size:1.3rem}
@media (max-width:860px){
  .lena-fab{right:.9rem;bottom:4.6rem;width:52px;height:52px}
}

/* ---------- Lena AI ---------- */
.lena-modal-overlay{
  position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:50;
  display:flex;align-items:center;justify-content:center;
  padding:1rem;overflow-y:auto;
}
.lena-modal-card{
  max-width:600px;width:100%;max-height:85vh;display:flex;flex-direction:column;
  overflow-y:auto;margin:auto;
}
.lena-modal-header{
  position:sticky;top:0;z-index:1;background:var(--card);
  display:flex;align-items:center;justify-content:space-between;gap:.5rem;
  padding-bottom:.5rem;margin-bottom:.3rem;
}
.lena-modal-header h3{margin:0}
.lena-modal-header-actions{display:flex;gap:.4rem;flex-shrink:0}
@media (max-width:480px){
  .lena-modal-overlay{padding:.6rem;align-items:flex-start}
  .lena-modal-card{max-height:none;min-height:calc(100vh - 1.2rem);margin-top:.6rem}
}
.lena-box{border:1px solid var(--border);border-radius:var(--radius-sm);padding:1rem;background:var(--code-bg)}
.lena-msg{padding:.6rem .85rem;border-radius:var(--radius-sm);margin-bottom:.5rem;max-width:85%;font-size:.9rem;line-height:1.45}
.lena-msg.user{background:var(--brand);color:#fff;margin-left:auto}
.lena-msg.bot{background:var(--card);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:6px;height:6px;border-radius:50%;background:var(--muted);opacity:.5;animation:lena-dot-bounce 1.2s infinite cubic-bezier(.4,0,.2,1)}
.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; }
}
.lena-menu-item{cursor:pointer;transition:border-color .15s ease}
.lena-menu-item:hover{border-color:var(--brand)}
.lena-tiles{display:grid;grid-template-columns:repeat(2,1fr);gap:.8rem}
.lena-tile{
  cursor:pointer;border:1px solid var(--border);border-radius:var(--radius);
  background:var(--card);
  padding:1.1rem 1rem;transition:border-color .15s ease,transform .15s ease,box-shadow .15s ease;
  box-shadow:var(--shadow-xs);
}
.lena-tile:hover{border-color:var(--brand);transform:translateY(-3px);box-shadow:var(--shadow-md)}
.lena-tile-icon{
  display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:var(--radius-sm);
  background:var(--accent-tint);color:var(--accent-text);font-size:1rem;margin-bottom:.65rem;
}
.lena-tile-scenario .lena-tile-icon{background:var(--chip-orange-bg);color:var(--accent)}
.lena-tile strong{display:block;font-size:.94rem;line-height:1.3;color:var(--text)}
.lena-tile p{margin:.35rem 0 0;font-size:.78rem;color:var(--muted)}
@media (max-width:480px){
  .lena-tiles{grid-template-columns:1fr}
}

.flashcard{perspective:1200px;cursor:pointer;margin:1rem 0;min-height:220px}
.flashcard-inner{position:relative;width:100%;height:220px;text-align:center;transition:transform .5s;transform-style:preserve-3d}
.flashcard.flipped .flashcard-inner{transform:rotateY(180deg)}
.flashcard-face{
  position:absolute;inset:0;backface-visibility:hidden;border-radius:var(--radius);
  border:1px solid var(--border);background:var(--card);display:flex;flex-direction:column;
  align-items:center;justify-content:center;padding:1.5rem;box-shadow:var(--shadow-sm);
}
.flashcard-front{background:var(--accent-tint)}
.flashcard-back{transform:rotateY(180deg)}
.flashcard-type{font-size:.72rem;text-transform:uppercase;letter-spacing:.04em;color:var(--accent-text);font-weight:700;margin-bottom:.5rem;font-family:var(--font-mono)}
.flashcard-text{font-size:1.05rem;line-height:1.5;color:var(--text)}
.flashcard-actions{margin-top:1rem}

@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,.25)}
  .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:1.2rem 1rem 5rem}
  .form-row{flex-direction:column}
  .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,.5);z-index:29}
  .header-actions{gap:.15rem}
  .header-actions .icon-btn{padding:.5rem .55rem}
  .user-chip-name{display:none}
}
@media (max-width: 420px){
  .header{padding:.6rem .7rem}
  .brand-mark{width:28px;height:28px;font-size:.8rem;border-radius:var(--radius-sm)}
  .brand-text{font-size:.92rem}
  .brand-sub{font-size:.55rem}
}
@media (min-width:861px){
  .bottom-nav{display:none}
}