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:root{--bg-base:#f8fafc;--bg-surface:#ffffffb3;--bg-surface-hover:#fffffff2;--brand-primary:#09f;--brand-secondary:#0284c7;--brand-gradient:linear-gradient(135deg, #09f, #38bdf8);--color-success:#10b981;--color-error:#f43f5e;--text-primary:#0f172a;--text-secondary:#475569;--text-muted:#64748b;--border-glass:1px solid #0099ff1f;--shadow-glass:0 10px 30px -10px #0099ff14, 0 1px 3px #00000005;--shadow-glow:0 0 25px #0099ff59;--radius-sm:8px;--radius-md:16px;--radius-lg:24px;--radius-full:9999px}.dark{--bg-base:#0b1120;--bg-surface:#0f172ab3;--bg-surface-hover:#1e293bf2;--brand-primary:#38bdf8;--brand-secondary:#7dd3fc;--brand-gradient:linear-gradient(135deg, #38bdf8, #818cf8);--color-success:#34d399;--color-error:#fb7185;--text-primary:#f8fafc;--text-secondary:#cbd5e1;--text-muted:#94a3b8;--border-glass:1px solid #38bdf826;--shadow-glass:0 10px 30px -10px #00000080, 0 1px 3px #0003;--shadow-glow:0 0 25px #38bdf840}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-base);color:var(--text-primary);font-family:var(--font-inter), sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;flex-direction:column;min-height:100vh;transition:background-color .3s,color .3s;display:flex}h1,h2,h3,h4,h5,h6{font-family:var(--font-outfit), sans-serif;font-weight:700;line-height:1.2}a{color:inherit;text-decoration:none}input[type=text],select,textarea{color:var(--text-primary);background:var(--bg-base);border:var(--border-glass);border-radius:var(--radius-sm);outline:none;width:100%;padding:12px;font-family:inherit;font-size:1rem;transition:border-color .2s,box-shadow .2s}input[type=text]:focus,select:focus,textarea:focus{border-color:var(--brand-primary);box-shadow:0 0 0 2px #09f3}.glass-card{background:var(--bg-surface);-webkit-backdrop-filter:blur(16px);border:var(--border-glass);border-radius:var(--radius-md);box-shadow:var(--shadow-glass);padding:24px;transition:transform .4s cubic-bezier(.16,1,.3,1),background .4s,border-color .4s;position:relative;overflow:hidden}.glass-card:before{content:"";z-index:1;pointer-events:none;background:linear-gradient(90deg,#fff0 0%,#ffffff1a 50%,#fff0 100%);width:50%;height:100%;transition:all .75s;position:absolute;top:0;left:-100%;transform:skew(-25deg)}.glass-card:hover{background:var(--bg-surface-hover);box-shadow:var(--shadow-glow);border-color:#38bdf866;transform:translateY(-6px)}.glass-card:hover:before{left:200%}.btn-primary{background:var(--brand-gradient);color:var(--text-primary);border-radius:var(--radius-full);font-family:var(--font-outfit), sans-serif;cursor:pointer;border:none;padding:12px 28px;font-size:1rem;font-weight:600;transition:all .3s;box-shadow:0 4px 15px #0003}.btn-primary:hover{box-shadow:var(--shadow-glow);transform:translateY(-2px)scale(1.02)}.btn-primary:active{transform:translateY(0)scale(.98)}.btn-outline-glass{background:var(--bg-surface);border:var(--border-glass);border-radius:var(--radius-sm);width:100%;color:var(--brand-primary);cursor:pointer;padding:12px;font-weight:600;transition:background .2s,transform .2s}.btn-outline-glass:hover{background:#0099ff1a;transform:translateY(-2px)}.btn-outline-glass:active{transform:translateY(0)scale(.98)}.text-gradient{background:var(--brand-gradient);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:.6s cubic-bezier(.16,1,.3,1) forwards fadeIn}@keyframes float{0%{transform:translateY(0)}50%{transform:translateY(-10px)}to{transform:translateY(0)}}.animate-float{animation:6s ease-in-out infinite float}.dashboard-container{background:radial-gradient(circle at top left, #0099ff1f, transparent 50%), radial-gradient(circle at bottom right, #38bdf814, transparent 50%), var(--bg-base);width:100%;min-height:100vh;display:flex}.dashboard-sidebar{background:var(--bg-surface);-webkit-backdrop-filter:blur(20px);border-right:var(--border-glass);flex-direction:column;width:280px;height:100vh;padding:24px;display:flex;position:sticky;top:0}.sidebar-logo{align-items:center;gap:12px;margin-bottom:40px;font-size:1.5rem;font-weight:700;display:flex}.sidebar-nav{flex-direction:column;flex:1;gap:8px;display:flex}.nav-item{border-radius:var(--radius-sm);color:var(--text-secondary);align-items:center;gap:12px;padding:12px 16px;font-weight:500;transition:all .2s;display:flex}.nav-item:hover,.nav-item.active{color:var(--text-primary);background:#ffffff0d}.nav-item.active{border-left:3px solid var(--brand-primary);background:linear-gradient(90deg,#0099ff1a 0%,#0000 100%)}.dashboard-main{flex-direction:column;flex:1;display:flex}.dashboard-header{border-bottom:var(--border-glass);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:10;justify-content:space-between;align-items:center;height:80px;padding:0 40px;display:flex;position:sticky;top:0}.dashboard-content{flex:1;padding:40px;overflow-y:auto}.dashboard-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px;margin-top:24px;display:grid}.stat-value{font-size:2.5rem;font-weight:700;font-family:var(--font-outfit);margin:8px 0}.chat-container{flex-direction:column;height:calc(100vh - 160px);display:flex;position:relative}.chat-messages{flex-direction:column;flex:1;gap:24px;margin-bottom:24px;padding-right:16px;display:flex;overflow-y:auto}.chat-messages::-webkit-scrollbar{width:6px}.chat-messages::-webkit-scrollbar-track{background:0 0}.chat-messages::-webkit-scrollbar-thumb{border-radius:var(--radius-full);background:#ffffff1a}.chat-bubble{border-radius:var(--radius-lg);max-width:80%;padding:16px 20px;line-height:1.6;animation:.3s fadeIn;position:relative}.chat-bubble.user{background:var(--brand-gradient);color:#fff;border-bottom-right-radius:4px;align-self:flex-end;box-shadow:0 4px 15px #8b5cf64d}.chat-bubble.ai{background:var(--bg-surface);-webkit-backdrop-filter:blur(12px);border:var(--border-glass);border-bottom-left-radius:4px;align-self:flex-start}.chat-input-area{background:var(--bg-surface);-webkit-backdrop-filter:blur(20px);border:var(--border-glass);border-radius:var(--radius-full);box-shadow:var(--shadow-glass);align-items:center;padding:8px 16px;transition:border-color .3s;display:flex;position:relative}.chat-input-area:focus-within{border-color:#8b5cf680;box-shadow:0 0 15px #8b5cf633}.chat-input{color:var(--text-primary);font-size:1rem;font-family:var(--font-inter);background:0 0;border:none;outline:none;flex:1;padding:12px}.chat-input::placeholder{color:var(--text-muted)}.chat-send-btn{background:var(--brand-gradient);color:#fff;cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;transition:transform .2s;display:flex}.chat-send-btn:hover{transform:scale(1.05)}.chat-send-btn:disabled{color:var(--text-muted);cursor:not-allowed;background:#0000000d;transform:none}.typing-indicator{align-items:center;gap:4px;padding:12px 16px;display:flex}.typing-dot{background:var(--text-muted);border-radius:50%;width:8px;height:8px;animation:1.4s ease-in-out infinite typing}.typing-dot:first-child{animation-delay:-.32s}.typing-dot:nth-child(2){animation-delay:-.16s}@keyframes typing{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}.flashcard-container{perspective:1000px;cursor:pointer;width:100%;max-width:600px;height:580px;margin:0 auto;position:relative}.flashcard{width:100%;height:100%;transform-style:preserve-3d;transition:transform .6s cubic-bezier(.4,0,.2,1);position:relative}.flashcard.flipped{transform:rotateY(180deg)}.flashcard-face{backface-visibility:hidden;border-radius:var(--radius-lg);background:var(--bg-surface);-webkit-backdrop-filter:blur(12px);border:var(--border-glass);width:100%;height:100%;box-shadow:var(--shadow-glass);text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:32px;display:flex;position:absolute}.flashcard-back{background:linear-gradient(135deg,#0099ff14,#38bdf826);border:1px solid #0099ff40;transform:rotateY(180deg)}@keyframes shake{0%,to{transform:translate(0)}10%,30%,50%,70%,90%{transform:translate(-5px)}20%,40%,60%,80%{transform:translate(5px)}}.quiz-option{border-radius:var(--radius-sm);width:100%;color:var(--text-primary);cursor:pointer;text-align:left;background:#0099ff0a;border:1px solid #0099ff1a;margin-bottom:12px;padding:16px 24px;font-size:1.1rem;transition:all .2s}.quiz-option:hover{background:#0099ff14;transform:translateY(-2px)}.quiz-option.correct{border-color:var(--color-success);background:#10b98126;box-shadow:0 0 20px #10b9814d}.quiz-option.wrong{border-color:var(--color-error);background:#f43f5e26;animation:.5s cubic-bezier(.36,.07,.19,.97) both shake}@keyframes spin{to{transform:rotate(360deg)}}.menu-item{color:var(--text-secondary);cursor:pointer;text-align:left;background:0 0;border:none;border-radius:6px;align-items:center;gap:12px;width:100%;padding:10px 12px;transition:background .2s,color .2s;display:flex}.menu-item:hover{background:var(--bg-surface-hover);color:var(--text-primary)}.menu-item-danger{color:var(--color-error)}.menu-item-danger:hover{color:var(--color-error);background:#f43f5e1a}