:root{--bg-deep: #020617;--bg-surface: #0f172a;--bg-card: rgba(30, 41, 59, .7);--primary-accent: #f59e0b;--cta-green: #10b981;--cta-green-hover: #059669;--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--border-subtle: rgba(255, 255, 255, .05);--border-focus: rgba(245, 158, 11, .5);--shadow-premium: 0 10px 25px -5px rgba(0, 0, 0, .5), 0 8px 10px -6px rgba(0, 0, 0, .5);--shadow-glow-green: 0 0 15px rgba(16, 185, 129, .2);--shadow-glow-saffron: 0 0 20px rgba(245, 158, 11, .2);--transition-smooth: all .3s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;overflow:hidden;background:radial-gradient(circle at top,#0f172a,#020617);color:var(--text-primary);font-family:Inter,-apple-system,sans-serif;-webkit-font-smoothing:antialiased}#root{height:100%}.app-container{display:flex;flex-direction:column;height:100%;max-width:100%}.app-content-wrapper{flex:1;overflow-y:auto;padding-top:64px;scrollbar-width:none;scroll-behavior:smooth}.app-content-wrapper::-webkit-scrollbar{display:none}.app-content{padding-bottom:8rem}.global-header{position:fixed;top:0;left:0;right:0;height:64px;background:var(--bg-surface);border-bottom:1px solid var(--border-subtle);z-index:1000;display:flex;align-items:center;padding:0 2rem;box-shadow:0 4px 15px #0000004d}.header-inner{width:100%;max-width:1000px;margin:0 auto;display:flex;justify-content:space-between;align-items:center}.guru-logo{font-size:1.8rem;font-weight:900;color:var(--primary-accent);letter-spacing:-1px}.guru-logo.clickable{cursor:pointer;transition:var(--transition-smooth);-webkit-user-select:none;user-select:none}.guru-logo.clickable:hover{filter:brightness(1.2);text-shadow:0 0 10px rgba(245,158,11,.3)}.header-right{display:flex;align-items:center;gap:1.5rem}.streak-counter{background:#f59e0b1a;color:var(--primary-accent);padding:.4rem 1rem;border-radius:20px;font-weight:800;font-size:.9rem}.profile-avatar-wrapper{width:40px;height:40px;border-radius:50%;overflow:hidden;border:2px solid var(--primary-accent);cursor:pointer;transition:var(--transition-smooth)}.profile-avatar-wrapper:hover{transform:scale(1.05);box-shadow:var(--shadow-glow-saffron)}.profile-avatar-img{width:100%;height:100%;object-fit:cover}.marathi-script:hover{filter:brightness(1.2);text-shadow:0 0 10px rgba(245,158,11,.3)}.marathi-script:active{transform:scale(.95)}.speaking{animation:pulse-speech 1.5s infinite ease-in-out}@keyframes pulse-speech{0%,to{opacity:1;transform:scale(1)}50%{opacity:.7;transform:scale(1.05)}}.example-text:hover{background:#ffffff14!important;color:#fff!important}.story-bubble{position:relative;background:var(--bg-surface);border:2px solid var(--primary-accent);border-radius:24px;padding:1.5rem;margin-top:1rem;cursor:pointer;transition:var(--transition-smooth);box-shadow:0 4px 20px #0000004d}.story-bubble:hover{transform:scale(1.02);box-shadow:0 0 20px #f59e0b26;background:#f59e0b0d}.story-bubble:before{content:"";position:absolute;top:-12px;left:50%;transform:translate(-50%);border-width:0 12px 12px 12px;border-style:solid;border-color:transparent transparent var(--primary-accent) transparent}.sentence-builder-area{min-height:80px;background:#ffffff0d;border-radius:16px;border:2px solid var(--border-subtle);padding:1rem;display:flex;flex-wrap:wrap;gap:.8rem;align-items:center;justify-content:flex-start;margin-bottom:2rem;transition:var(--transition-smooth)}.sentence-builder-area.success{border-color:var(--cta-green);background:#10b9811a;box-shadow:0 0 20px #10b98133}.word-chip{background:var(--bg-surface);border:1px solid var(--border-subtle);color:var(--text-primary);padding:.8rem 1.2rem;border-radius:12px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .15s cubic-bezier(.4,0,.2,1);box-shadow:0 4px #00000080;-webkit-user-select:none;user-select:none;position:relative;top:0}.word-chip:hover{background:var(--bg-card);transform:translateY(-1px)}.word-chip:active{transform:translateY(2px);box-shadow:0 0 #0000}.word-chip.selected{background:var(--primary-accent);color:#000;border-color:var(--primary-accent);box-shadow:0 4px #b45309}.word-chip.ghost{opacity:0;pointer-events:none;background:#ffffff1a;box-shadow:none;border:2px dashed var(--border-subtle);color:transparent}.word-chip.locked{cursor:default;pointer-events:none}.chat-word-interactive{display:inline-block;color:var(--primary-accent);font-weight:600;cursor:pointer;padding:2px 4px;margin:0 2px;border-radius:8px;border-bottom:2px dotted rgba(245,158,11,.5);position:relative;transition:all .2s cubic-bezier(.4,0,.2,1);line-height:1.6}.chat-word-interactive:hover{background:#f59e0b1a;border-bottom-style:solid}.chat-word-interactive.active{background:var(--primary-accent);color:#0d0f14;border-bottom:2px solid transparent;box-shadow:0 2px 8px #f59e0b4d;transform:none}.word-tooltip{background:#1e293b;border:1px solid var(--border-subtle);color:#fff;padding:10px 14px;border-radius:14px;box-shadow:0 10px 25px #00000080;animation:tooltip-pop .3s cubic-bezier(.34,1.56,.64,1);min-width:120px;text-align:center;pointer-events:none}@keyframes tooltip-pop{0%{opacity:0;transform:translate(-50%) scale(.9)}to{opacity:1;transform:translate(-50%,-10px) scale(1)}}.word-tooltip:after{content:"";position:absolute;top:100%;left:50%;margin-left:-6px;border-width:6px;border-style:solid;border-color:#1e293b transparent transparent transparent}.tooltip-meaning{display:block;font-size:.95rem;font-weight:800;color:var(--primary-accent);margin-bottom:3px;letter-spacing:.5px}.tooltip-transliteration{display:block;font-size:.8rem;color:#94a3b8;font-style:italic;font-weight:500}.grammar-card{margin-top:1rem;background:#ffffff08;border:1px solid rgba(239,68,68,.3);border-radius:16px;padding:1rem;font-size:.9rem}.grammar-diff{display:flex;flex-direction:column;gap:.5rem;margin-bottom:.8rem}.diff-wrong{color:#f87171;text-decoration:line-through;opacity:.8}.diff-correct{color:#4ade80;font-weight:700}.grammar-explanation{color:var(--text-secondary);font-style:italic;font-size:.85rem;border-top:1px solid var(--border-subtle);padding-top:.5rem}.profile-overlay-backdrop{position:fixed;top:0;left:0;right:0;bottom:0;background:#0009;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);z-index:2000;display:flex;align-items:center;justify-content:center;animation:fadeIn .2s ease-out}.profile-overlay-card{width:90%;max-width:440px;background:#0f172af2;border:1px solid var(--primary-accent);border-radius:32px;box-shadow:var(--shadow-premium),var(--shadow-glow-saffron);overflow:hidden;animation:slideUp .3s cubic-bezier(.34,1.56,.64,1)}.profile-header{padding:1.5rem 2rem;border-bottom:1px solid var(--border-subtle);display:flex;justify-content:space-between;align-items:center}.profile-header h2{font-size:1.25rem;font-weight:800;color:var(--primary-accent);margin:0}.close-btn{background:none;border:none;color:var(--text-secondary);font-size:1.4rem;cursor:pointer;transition:color .2s}.close-btn:hover{color:#fff}.profile-content{padding:2rem;display:flex;flex-direction:column;gap:2rem}.profile-section{display:flex;flex-direction:column;gap:.75rem}.profile-section label{font-size:.75rem;font-weight:800;color:var(--text-secondary);text-transform:uppercase;letter-spacing:1.5px}.avatar-preview-main{width:100px;height:100px;margin:0 auto;border-radius:50%;overflow:hidden;border:3px solid var(--primary-accent);box-shadow:var(--shadow-glow-saffron);margin-bottom:.5rem}.avatar-preview-main img{width:100%;height:100%;object-fit:cover}.avatar-picker-grid{display:flex;justify-content:center;gap:.75rem;flex-wrap:wrap}.avatar-choice{width:50px;height:50px;border-radius:50%;overflow:hidden;border:2px solid transparent;cursor:pointer;transition:var(--transition-smooth)}.avatar-choice.active{border-color:var(--primary-accent);transform:scale(1.15);box-shadow:0 0 10px #f59e0b66}.avatar-choice img{width:100%;height:100%;object-fit:cover}.profile-input{width:100%;background:#0003;border:none;border-bottom:2px solid var(--border-subtle);padding:.75rem 0;font-size:1.1rem;color:#fff;outline:none;transition:border-color .3s}.profile-input:focus{border-color:var(--primary-accent)}.profile-select{width:100%;background:#0003;border:1px solid var(--border-subtle);padding:.75rem 1rem;border-radius:12px;color:#fff;font-size:1rem;outline:none;-webkit-appearance:none;-moz-appearance:none;appearance:none;cursor:pointer}.setting-hint{font-size:.75rem;color:var(--text-muted);line-height:1.4}.profile-footer{padding:1.5rem 2rem 2rem;display:flex;flex-direction:column;gap:1rem}.save-changes-btn{width:100%;padding:1.1rem;background:var(--primary-accent);color:#000;border:none;border-radius:16px;font-weight:800;font-size:1rem;cursor:pointer;transition:transform .2s,background-color .2s}.save-changes-btn:hover{background:#fbbf24;transform:translateY(-2px)}.logout-secondary-btn{width:100%;padding:.75rem;background:transparent;color:var(--text-muted);border:1px solid var(--border-subtle);border-radius:16px;font-size:.85rem;font-weight:600;cursor:pointer;transition:all .2s}.logout-secondary-btn:hover{color:#ef4444;border-color:#ef444455;background:#ef444411}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.auth-container{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;padding:2rem;background:radial-gradient(circle at center,#1e293b,#020617)}.auth-logo-section{text-align:center;margin-bottom:3rem}.guru-logo.large{font-size:4rem;font-weight:900;color:var(--primary-accent);letter-spacing:-2px;text-shadow:0 0 30px rgba(245,158,11,.3)}.guru-tagline{font-size:1.1rem;color:var(--text-secondary);font-style:italic;font-weight:400;margin-top:-.5rem}.auth-card{background:var(--bg-card);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--border-subtle);border-radius:24px;padding:2.5rem;width:100%;max-width:420px;box-shadow:var(--shadow-premium);animation:float 6s ease-in-out infinite}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.auth-form input{width:100%;padding:1.1rem 1.25rem;background:#0f172a99;border:1px solid var(--border-subtle);border-radius:16px;color:#fff;font-size:1rem;margin-bottom:1.25rem;transition:var(--transition-smooth)}.auth-form input:focus{border-color:var(--primary-accent);outline:none;background:#0f172acc}.cta-button{width:100%;padding:1.1rem;background:var(--cta-green);color:#fff;border:none;border-radius:16px;font-size:1.1rem;font-weight:700;cursor:pointer;transition:var(--transition-smooth);box-shadow:var(--shadow-glow-green)}.cta-button:hover{background:var(--cta-green-hover);transform:translateY(-2px);box-shadow:0 10px 20px #10b9814d}.cta-button:disabled{background:var(--text-muted);box-shadow:none;cursor:not-allowed;transform:none}.language-selection-container{padding:2rem;max-width:800px;margin:0 auto}.language-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;margin-top:2rem}.language-card-select{position:relative;height:180px;border-radius:20px;overflow:hidden;background:var(--bg-surface);border:1px solid var(--border-subtle);cursor:pointer;transition:var(--transition-smooth);box-shadow:var(--shadow-premium)}.language-card-select:hover{transform:translateY(-8px);border-color:var(--primary-accent)}.lang-thumbnail-wrapper{position:absolute;top:0;left:0;width:100%;height:100%;z-index:1}.lang-thumbnail-wrapper img{width:100%;height:100%;object-fit:cover;transition:var(--transition-smooth);filter:brightness(.6)}.language-card-select:hover img{filter:brightness(.85)}.lang-card-content{position:absolute;bottom:1.5rem;left:1.5rem;z-index:2;text-align:left}.lang-name{font-size:1.4rem;font-weight:800;color:#fff;text-shadow:0 2px 4px rgba(0,0,0,.5)}.lang-native{font-size:.9rem;color:var(--text-secondary);font-weight:500;margin-top:.1rem}.lesson-path-container{max-width:480px;margin:0 auto;position:relative;padding-bottom:4rem}.unit-container{padding-bottom:5rem;position:relative}.unit-banner{width:100%;padding:2rem 1.5rem;background:var(--bg-surface);margin-bottom:2rem;border-bottom:1px solid var(--border-subtle);position:sticky;top:0;z-index:10}.unit-title{color:var(--primary-accent);font-weight:900;font-size:1.2rem;letter-spacing:2px;margin-bottom:.25rem}.unit-path{position:relative;display:flex;flex-direction:column;align-items:center;gap:3.5rem}.unit-path:before{content:"";position:absolute;top:0;bottom:0;left:50%;width:10px;background:#1e293b;transform:translate(-50%);z-index:0;border-radius:5px}.lesson-node-container{position:relative;z-index:2;display:flex;flex-direction:column;align-items:center;width:100%;transition:transform .6s cubic-bezier(.34,1.56,.64,1)}.lesson-node-circle{width:100px;height:100px;border-radius:50%;display:flex;align-items:center;justify-content:center;border:none;cursor:pointer;transition:var(--transition-smooth);box-shadow:0 8px #0000004d;position:relative}.lesson-icon-inner{font-size:3.5rem;display:flex;align-items:center;justify-content:center;transition:transform .2s}.lesson-node-circle:hover .lesson-icon-inner{transform:scale(1.1)}.lesson-node-circle.completed{background:var(--cta-green);box-shadow:0 8px #065f46,0 0 20px #10b98133}.lesson-node-circle.unlocked{background:var(--primary-accent);box-shadow:0 8px #b45309,var(--shadow-glow-saffron)}.lesson-node-circle.locked{background:#334155;box-shadow:0 8px #1e293b;cursor:not-allowed;opacity:.8}.completion-check{position:absolute;bottom:-2px;right:-2px;background:var(--cta-green);color:#fff;width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:900;border:4px solid var(--bg-deep);font-size:1rem;box-shadow:0 2px 10px #0000004d}.lesson-node-circle.unlocked:not(.completed){animation:pulse-ring 2s infinite cubic-bezier(.4,0,.6,1)}@keyframes pulse-ring{0%{box-shadow:0 8px #b45309,0 0 #f59e0b66}70%{box-shadow:0 8px #b45309,0 0 0 15px #f59e0b00}to{box-shadow:0 8px #b45309,0 0 #f59e0b00}}.lesson-node-label{margin-top:1rem;font-weight:700;color:var(--text-primary);background:var(--bg-surface);padding:.4rem 1rem;border-radius:12px;border:1px solid var(--border-subtle);font-size:.9rem;white-space:nowrap}.main-nav{position:fixed;bottom:1.5rem;left:50%;transform:translate(-50%);width:calc(100% - 3rem);max-width:420px;background:#0f172ad9;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:28px;padding:.8rem;display:flex;justify-content:space-around;box-shadow:var(--shadow-premium);border:1px solid var(--border-subtle);z-index:1000}.main-nav button{background:none;border:none;display:flex;flex-direction:column;align-items:center;gap:.3rem;color:var(--text-secondary);font-weight:700;font-size:.8rem;cursor:pointer;transition:var(--transition-smooth)}.main-nav button.active{color:var(--primary-accent)}.nav-icon{font-size:1.6rem}