@import "https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap";:root{--bg-primary:#0f1115;--bg-secondary:#1a1d24;--bg-tertiary:#252a34;--accent-primary:#7c3aed;--accent-secondary:#a78bfa;--text-primary:#f8fafc;--text-secondary:#94a3b8;--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--border-color:#ffffff0d;--glass-bg:#1a1d24b3;--glass-border:#ffffff1a;--shadow-sm:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-md:0 10px 15px -3px #0000004d, 0 4px 6px -2px #00000026;--shadow-lg:0 20px 25px -5px #0006, 0 10px 10px -5px #0003}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-primary);min-height:100vh;font-family:Outfit,sans-serif;line-height:1.5;overflow-x:hidden}#root{min-height:100vh;display:flex}.glass{background:var(--glass-bg);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-border);box-shadow:var(--shadow-md);border-radius:16px}.app-container{width:100%;height:100vh;display:flex}.sidebar{background:var(--bg-secondary);border-right:1px solid var(--border-color);flex-direction:column;gap:8px;width:280px;padding:24px;display:flex}.sidebar-logo{color:var(--text-primary);align-items:center;gap:12px;margin-bottom:40px;padding:0 12px;font-size:24px;font-weight:700;display:flex}.sidebar-logo span{background:linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));-webkit-text-fill-color:transparent;-webkit-background-clip:text}.nav-item{color:var(--text-secondary);cursor:pointer;text-align:left;background:0 0;border:none;border-radius:12px;align-items:center;gap:12px;width:100%;padding:12px 16px;font-size:16px;font-weight:500;text-decoration:none;transition:all .2s;display:flex}.nav-item:hover{background:var(--bg-tertiary);color:var(--text-primary)}.nav-item.active{color:var(--accent-secondary);background:#7c3aed1a;position:relative}.nav-item.active:before{content:"";background:var(--accent-primary);border-radius:0 4px 4px 0;width:4px;height:20px;position:absolute;top:50%;left:0;transform:translateY(-50%)}.main-content{flex:1;padding:40px;position:relative;overflow-y:auto}.main-content:before{content:"";pointer-events:none;z-index:-1;background:radial-gradient(circle,#7c3aed26 0%,#0f111500 70%);width:50%;height:50%;position:absolute;top:-20%;left:-10%}h1,h2,h3,h4,h5,h6{color:var(--text-primary);margin-bottom:16px;font-weight:600}.page-title{margin-bottom:8px;font-size:32px}.page-subtitle{color:var(--text-secondary);margin-bottom:32px;font-size:16px}.btn{cursor:pointer;border:none;border-radius:10px;justify-content:center;align-items:center;gap:8px;padding:10px 20px;font-family:Outfit,sans-serif;font-size:14px;font-weight:600;transition:all .2s;display:inline-flex}.btn-primary{background:linear-gradient(135deg, var(--accent-primary), #5b21b6);color:#fff;box-shadow:0 4px 12px #7c3aed4d}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 16px #7c3aed66}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-color)}.btn-secondary:hover{background:var(--bg-secondary);border-color:var(--glass-border)}.btn-icon{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-radius:8px;padding:8px;transition:all .2s}.btn-icon:hover{background:var(--bg-tertiary);color:var(--text-primary)}.card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:16px;padding:24px;transition:transform .2s,box-shadow .2s}.card:hover{box-shadow:var(--shadow-lg);border-color:#7c3aed4d;transform:translateY(-4px)}.input-group{margin-bottom:16px}.input-label{color:var(--text-secondary);margin-bottom:8px;font-size:14px;font-weight:500;display:block}.input-field{background:var(--bg-tertiary);border:1px solid var(--border-color);width:100%;color:var(--text-primary);border-radius:10px;padding:12px 16px;font-family:Outfit,sans-serif;font-size:15px;transition:all .2s}.input-field:focus{border-color:var(--accent-primary);outline:none;box-shadow:0 0 0 2px #7c3aed33}.badge{border-radius:20px;padding:4px 10px;font-size:12px;font-weight:600}.badge-purple{color:var(--accent-secondary);background:#7c3aed26}.badge-green{color:var(--success);background:#10b98126}.badge-red{color:var(--danger);background:#ef444426}.badge-yellow{color:var(--warning);background:#f59e0b26}.grid-2{grid-template-columns:repeat(2,1fr);gap:24px;display:grid}.grid-3{grid-template-columns:repeat(3,1fr);gap:24px;display:grid}.grid-4{grid-template-columns:repeat(4,1fr);gap:24px;display:grid}.flex{display:flex}.flex-col{flex-direction:column;display:flex}.items-center{align-items:center}.justify-between{justify-content:space-between}.justify-center{justify-content:center}.gap-2{gap:8px}.gap-4{gap:16px}.gap-6{gap:24px}.mt-2{margin-top:8px}.mt-4{margin-top:16px}.mt-6{margin-top:24px}.mb-2{margin-bottom:8px}.mb-4{margin-bottom:16px}.mb-6{margin-bottom:24px}.w-full{width:100%}.text-center{text-align:center}.text-right{text-align:right}.text-muted{color:var(--text-secondary)}.text-accent{color:var(--accent-secondary)}.progress-container{background:var(--bg-tertiary);border-radius:4px;width:100%;height:8px;overflow:hidden}.progress-bar{background:linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));border-radius:4px;height:100%;transition:width .3s}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:.4s forwards fadeIn}.timer-circle{background:conic-gradient(var(--accent-primary) var(--progress), var(--bg-tertiary) 0deg);border-radius:50%;justify-content:center;align-items:center;width:250px;height:250px;margin:0 auto;display:flex;position:relative}.timer-circle:before{content:"";background:var(--bg-secondary);border-radius:50%;width:230px;height:230px;position:absolute}.timer-display{z-index:1;font-variant-numeric:tabular-nums;flex-direction:column;align-items:center;font-size:48px;font-weight:700;display:flex;position:relative}.timer-label{color:var(--text-secondary);margin-top:4px;font-size:16px;font-weight:500}.flashcard-container{perspective:1000px;width:100%;height:300px}.flashcard{width:100%;height:100%;transform-style:preserve-3d;cursor:pointer;transition:transform .6s;position:relative}.flashcard.flipped{transform:rotateY(180deg)}.flashcard-front,.flashcard-back{backface-visibility:hidden;text-align:center;border-radius:16px;flex-direction:column;justify-content:center;align-items:center;width:100%;height:100%;padding:32px;display:flex;position:absolute}.flashcard-front{background:linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));border:1px solid var(--border-color)}.flashcard-back{background:linear-gradient(135deg, var(--accent-primary), #5b21b6);color:#fff;border:1px solid #fff3;transform:rotateY(180deg)}