:root{--bg-primary:#0b0f1a;--bg-elev-1:#111729;--bg-elev-2:#162036;--bg-glass:#0f162899;--accent-cyan:#00d9ff;--accent-blue:#3b82f6;--accent-violet:#7c3aed;--accent-green:#10b981;--text-primary:#f8fafc;--text-secondary:#cbd5e1;--text-muted:#8aa0b7;--line:#94a3b81f;--line-strong:#94a3b83d;--glow-cyan:0 0 24px #00d9ff59;--glow-blue:0 0 24px #3b82f647}body,html{height:100%}body{background:radial-gradient(1200px 600px at 50% -200px,#00d9ff14,#0000 70%),radial-gradient(900px 500px at 110% 20%,#7c3aed12,#0000 70%),#0b0f1a;background:radial-gradient(1200px 600px at 50% -200px,#00d9ff14,#0000 70%),radial-gradient(900px 500px at 110% 20%,#7c3aed12,#0000 70%),var(--bg-primary);color:#cbd5e1;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}body:before{background-image:linear-gradient(#ffffff08 1px,#0000 0),linear-gradient(90deg,#ffffff08 1px,#0000 0);background-size:40px 40px;content:"";inset:0;-webkit-mask-image:radial-gradient(60% 60% at 50% 20%,#000,#0000 80%);mask-image:radial-gradient(60% 60% at 50% 20%,#000,#0000 80%);opacity:.35;pointer-events:none;position:fixed}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;margin:0}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}.flashcard-modal{max-width:600px!important;padding:30px!important}.flashcard-modal h2{margin-bottom:10px}.flashcard-modal p{color:var(--text-muted);margin-bottom:25px}.lesson-selection-list{border-bottom:1px solid var(--bg-tertiary);border-top:1px solid var(--bg-tertiary);margin:0 -10px 25px;max-height:40vh;overflow-y:auto;padding:10px}.lesson-item,.select-all-container{align-items:center;border-radius:8px;display:flex;padding:12px 10px;transition:background-color .2s}.lesson-item:hover{background-color:var(--bg-tertiary)}.lesson-item input[type=checkbox],.select-all-container input[type=checkbox]{accent-color:var(--accent-cyan);cursor:pointer;height:18px;margin-right:15px;width:18px}.lesson-item label,.select-all-container label{color:var(--text-secondary);cursor:pointer;display:flex;font-weight:500;justify-content:space-between;width:100%}.select-all-container{border-bottom:2px solid var(--bg-tertiary);margin-bottom:5px}.select-all-container label{color:var(--text-primary);font-weight:600}.card-count{color:var(--text-muted);font-size:.9rem}.lesson-selection-list::-webkit-scrollbar{width:8px}.lesson-selection-list::-webkit-scrollbar-track{background:var(--bg-secondary)}.lesson-selection-list::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:4px}.lesson-selection-list::-webkit-scrollbar-thumb:hover{background:var(--accent-purple)}.btn-confirm:disabled{box-shadow:none;cursor:not-allowed;opacity:.5;transform:none}.flashcard-stats-widget{background:var(--bg-secondary);border:2px solid var(--bg-tertiary);border-radius:16px;box-shadow:0 4px 20px #0000004d;margin:0 auto 40px;max-width:1200px;padding:32px;transition:all .3s ease}.flashcard-stats-widget:hover{border-color:var(--accent-cyan);box-shadow:0 8px 32px #00d9ff33}.widget-header{align-items:center;border-bottom:1px solid var(--bg-tertiary);display:flex;gap:12px;margin-bottom:24px;padding-bottom:20px}.widget-header h2{color:var(--text-primary);font-family:Space Grotesk,sans-serif;font-size:1.5rem;font-weight:700;margin:0}.widget-body{grid-gap:20px;align-items:center;display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}.stats-row{display:flex;gap:16px}.stat-badge{align-items:center;background:var(--bg-primary);border:2px solid var(--bg-tertiary);border-radius:12px;display:flex;flex:1 1;gap:12px;padding:16px 20px;transition:all .3s ease}.stat-badge:hover{border-color:var(--accent-cyan);transform:translateY(-2px)}.stat-badge.streak{border-color:#ff6b6b66}.stat-badge.streak:hover{border-color:#ff6b6b;box-shadow:0 4px 16px #ff6b6b4d}.stat-badge.due{border-color:#00d9ff66}.stat-badge.due:hover{border-color:var(--accent-cyan);box-shadow:0 4px 16px #00d9ff4d}.badge-icon{flex-shrink:0;font-size:2rem}.badge-content{display:flex;flex-direction:column;gap:2px}.badge-value{color:var(--text-primary);font-family:Space Grotesk,sans-serif;font-size:2rem;font-weight:700;line-height:1}.badge-label{color:var(--text-muted);font-size:.8rem;font-weight:500}.progress-section{background:var(--bg-primary);border:1px solid var(--bg-tertiary);border-radius:12px;display:flex;flex-direction:column;gap:12px;grid-column:1/-1;padding:20px}.progress-label{align-items:center;color:var(--text-muted);display:flex;font-size:.9rem;font-weight:500;justify-content:space-between}.progress-bar-widget{background:#0000004d;border-radius:10px;height:10px;overflow:hidden;position:relative}.progress-bar-fill-widget{background:linear-gradient(90deg,var(--accent-cyan),var(--accent-purple));border-radius:10px;box-shadow:0 0 10px var(--accent-cyan);height:100%;transition:width .8s cubic-bezier(.4,0,.2,1)}.weekly-stats{background:#00d9ff0d;border:1px solid #00d9ff33;border-radius:8px;padding:12px;text-align:center}.weekly-label{color:var(--text-muted);font-size:.9rem;font-weight:500}.review-link{text-decoration:none}.btn-start-review{align-items:center;background:linear-gradient(135deg,var(--accent-cyan),var(--accent-purple));border:none;border-radius:12px;box-shadow:0 4px 15px #00d9ff4d;color:var(--text-primary);cursor:pointer;display:flex;font-family:Space Grotesk,sans-serif;font-size:1rem;font-weight:700;gap:8px;grid-column:1/-1;justify-content:center;padding:14px 24px;transition:all .3s ease}.btn-start-review:hover{box-shadow:0 6px 25px #00d9ff80;transform:translateY(-2px)}.btn-get-started{background:linear-gradient(135deg,var(--accent-green),#0c7);box-shadow:0 4px 15px #00ff884d}.btn-get-started:hover{box-shadow:0 6px 25px #00ff8880}.all-caught-up{background:#00ff8814;border:1px solid #00ff884d;border-radius:10px;color:var(--text-primary);font-size:1rem;font-weight:600;grid-column:1/-1;padding:16px;text-align:center}@media (max-width:768px){.flashcard-stats-widget{padding:24px}.widget-body{grid-template-columns:1fr}.stats-row{flex-direction:column}.widget-header h2{font-size:1.3rem}.badge-value{font-size:1.8rem}.progress-section{padding:16px}}.focus-bar{background:linear-gradient(90deg,var(--accent-cyan) 0,var(--accent-purple) 50%,var(--accent-cyan) 100%);box-shadow:0 0 10px #00d9ff80;height:3px;left:0;position:fixed;top:0;width:100%;z-index:101}*{box-sizing:border-box;margin:0;padding:0}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color:var(--text-secondary);line-height:1.6}.dashboard,body{background:var(--bg-primary)}.dashboard{min-height:100vh}.header{-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);background:#121b2dd9;border-bottom:none;box-shadow:0 4px 12px #0009;justify-content:space-between;padding:1rem 2rem;position:-webkit-sticky;position:sticky;top:0;z-index:100}.header,.logo{align-items:center;display:flex}.logo{color:var(--text-primary);font-family:Space Grotesk,sans-serif;font-size:1.5rem;font-weight:700;gap:.5rem;letter-spacing:-.5px}.logo-icon{color:var(--accent-cyan);filter:drop-shadow(var(--glow-cyan));font-size:1.75rem}nav{align-items:center;display:flex;gap:1rem}.user-info{background:var(--bg-tertiary);border-radius:8px;padding:.5rem 1rem}.nav-btn,.user-info{align-items:center;color:var(--text-secondary);display:flex;font-size:.875rem;gap:.5rem}.nav-btn{background:#0000;border:1px solid var(--bg-tertiary);border-radius:8px;cursor:pointer;font-weight:500;padding:.5rem 1.25rem;transition:all .2s cubic-bezier(.4,0,.2,1)}.nav-btn:hover{background:var(--bg-tertiary);border-color:var(--accent-cyan);box-shadow:0 0 15px #00d9ff66;color:var(--text-primary);transform:translateY(-1px)}.hero{padding:5rem 2rem 4rem;position:relative;text-align:center}.hero:before{background:radial-gradient(ellipse at center,#00d9ff1a,#0000 70%);content:"";height:500px;left:50%;pointer-events:none;position:absolute;top:0;transform:translateX(-50%);width:900px;z-index:0}.hero-content{margin:0 auto;max-width:1000px;position:relative;z-index:1}.hero h1{-webkit-text-fill-color:#0000;background:linear-gradient(135deg,var(--text-primary) 30%,var(--accent-cyan) 80%);-webkit-background-clip:text;font-family:Space Grotesk,sans-serif;font-size:4rem;font-weight:800;letter-spacing:-2px;line-height:1.1;margin-bottom:1rem}.hero-subtitle{color:var(--text-muted);font-size:1.125rem;font-weight:400;margin-bottom:3rem}.hero-stats{display:flex;gap:4rem;justify-content:center;margin-top:2.5rem}.stat-item{padding:1rem;position:relative;text-align:center}.stat-value{color:var(--accent-cyan);display:block;filter:drop-shadow(0 0 5px rgba(0,217,255,.5));font-family:Space Grotesk,sans-serif;font-size:3rem;font-weight:700;line-height:1;margin-bottom:.25rem}.stat-label{font-size:.8rem;font-weight:600;letter-spacing:1.5px;text-transform:uppercase}.progress-section{grid-gap:1.5rem;display:grid;gap:1.5rem;grid-template-columns:1fr 1fr;margin:0 auto 5rem;max-width:1000px;padding:0 2rem}.progress-card{background:var(--bg-secondary);border:1px solid var(--bg-tertiary);border-radius:16px;box-shadow:inset 0 0 8px #00d9ff0d,0 10px 30px #0009;padding:2.5rem;position:relative}.practice-card-body{align-items:center;display:flex;flex-direction:column;height:100%;justify-content:center;text-align:center}.practice-card-body p{color:var(--text-muted);font-size:.95rem;margin-bottom:2rem;max-width:80%}.btn-start-practice{background:linear-gradient(135deg,var(--accent-cyan) 0,var(--accent-purple) 100%);border:none;border-radius:10px;box-shadow:0 4px 15px #00d9ff4d;color:var(--text-primary);cursor:pointer;font-family:Space Grotesk,sans-serif;font-size:1rem;font-weight:600;padding:1rem 2rem;transition:all .2s cubic-bezier(.4,0,.2,1)}.btn-start-practice:hover{box-shadow:0 6px 20px #00d9ff80;transform:translateY(-2px)}.progress-header{align-items:center;display:flex;justify-content:space-between;margin-bottom:1.5rem}.progress-header h2{color:var(--text-primary);font-family:Space Grotesk,sans-serif;font-size:1.5rem;font-weight:700}.circular-progress-container{align-items:center;display:flex;height:80px;justify-content:center;position:relative;width:80px}.progress-ring{left:0;position:absolute;top:0;transform:rotate(-90deg)}.ring-bg{stroke-dasharray:283;stroke-dashoffset:0;stroke:var(--bg-tertiary);stroke-width:5;fill:#0000}.ring-fill{stroke-dasharray:283;stroke-dashoffset:283;stroke:url(#progressGradient);stroke-width:5;fill:#0000;stroke-linecap:round;filter:drop-shadow(0 0 5px rgba(0,217,255,.7));transition:stroke-dashoffset 1.5s cubic-bezier(.4,0,.2,1)}.progress-percentage-arc{color:var(--accent-cyan);font-family:Space Grotesk,sans-serif;font-size:1.5rem;font-weight:700;position:relative;z-index:5}.progress-bar-container{background:var(--bg-primary);border:1px solid var(--bg-tertiary);border-radius:8px;height:16px;margin-bottom:1rem;overflow:hidden;position:relative}.progress-bar-fill{background:linear-gradient(90deg,var(--accent-cyan) 0,var(--accent-purple) 100%);border-radius:8px;box-shadow:var(--glow-cyan);height:100%;position:relative;transition:width .6s cubic-bezier(.4,0,.2,1)}.progress-details{color:var(--text-muted);display:flex;font-size:.9rem;font-weight:500;justify-content:space-between}.lessons-section{margin:0 auto;max-width:1200px;padding:0 2rem 6rem}.section-header{margin-bottom:3rem;text-align:center}.section-title{color:var(--text-primary);font-family:Space Grotesk,sans-serif;font-size:2.25rem;font-weight:700;margin-bottom:.5rem}.section-subtitle{color:var(--text-muted);font-size:1rem}.daily-tiles-grid{grid-gap:24px;display:grid;gap:24px;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));padding:20px 0}.daily-tile{background:var(--bg-secondary);border:2px solid var(--bg-tertiary);border-radius:16px;box-shadow:inset 0 0 8px #00d9ff0d,0 4px 16px #0000004d;display:flex;flex-direction:column;gap:16px;min-height:280px;overflow:hidden;padding:24px;position:relative;transition:all .3s cubic-bezier(.4,0,.2,1)}.daily-tile:hover:not(.locked){border-color:var(--domain-color);box-shadow:0 12px 32px var(--domain-glow);transform:translateY(-4px) scale(1.01) perspective(1000px) rotateX(.5deg) rotateY(.5deg)}.daily-tile.completed{animation:completionPulse .6s ease-out;border-color:var(--accent-green)}.daily-tile.completed:before{background:linear-gradient(90deg,var(--accent-green),var(--accent-cyan));content:"";height:3px;left:0;position:absolute;right:0;top:0}.daily-tile.locked{border-color:var(--bg-tertiary);cursor:not-allowed;opacity:.5}.tile-icon-section{align-items:flex-start;display:flex;justify-content:space-between}.lesson-icon{align-items:center;background:#0003;border-radius:12px;display:flex;justify-content:center;padding:12px;transition:transform .3s ease}.daily-tile:hover:not(.locked) .lesson-icon{transform:scale(1.1) rotate(5deg)}.lesson-number-badge{border-radius:20px;display:inline-block;font-family:Space Grotesk,sans-serif;font-size:.75rem;font-weight:700;letter-spacing:.5px;padding:6px 14px;text-transform:uppercase}.completion-checkbox{-webkit-appearance:none;appearance:none;background-color:#0000004d;border:2.5px solid #ffffff4d;border-radius:8px;box-shadow:0 0 0 0 #0f80;cursor:pointer;flex-shrink:0;height:28px;position:relative;transition:all .3s ease;width:28px}.completion-checkbox:hover:not(:disabled){background-color:#00ff881a;border-color:var(--accent-green);box-shadow:0 0 12px #0f86;transform:scale(1.15)}.completion-checkbox:checked{animation:checkboxPulse .4s ease-out;background:linear-gradient(135deg,var(--accent-green),#0c7);border-color:var(--accent-green);box-shadow:0 0 16px #0f89}.completion-checkbox:checked:after{color:#fff;content:"✓";font-size:18px;font-weight:700;left:50%;position:absolute;text-shadow:0 1px 2px #0000004d;top:50%;transform:translate(-50%,-50%)}.completion-checkbox:disabled{cursor:not-allowed;opacity:.4}@keyframes checkboxPulse{0%{box-shadow:0 0 0 0 #0f89;transform:scale(1)}50%{box-shadow:0 0 20px #0f8c;transform:scale(1.2)}to{box-shadow:0 0 16px #0f89;transform:scale(1)}}.tile-content{display:flex;flex-direction:column;flex-grow:1;gap:8px}.day-title{color:var(--text-primary);font-family:Space Grotesk,sans-serif;font-size:1.4rem;font-weight:700;line-height:1.3;margin:0}.lesson-description{font-size:.9rem;font-weight:600;margin:0;opacity:.9}.tile-actions{margin-top:auto}.tile-btn-link{display:block;text-decoration:none}.tile-btn{align-items:center;border:none;border-radius:12px;cursor:pointer;display:flex;font-family:Space Grotesk,sans-serif;font-size:1rem;font-weight:700;gap:8px;justify-content:center;padding:14px 20px;transition:all .3s ease;width:100%}.btn-start{color:var(--text-primary)}.btn-start:hover{box-shadow:0 8px 24px var(--domain-glow)!important;transform:translateY(-2px)}.btn-start svg{transition:transform .3s ease}.btn-start:hover svg{transform:translateX(3px)}.btn-locked{background-color:var(--bg-tertiary);box-shadow:none;color:var(--text-muted);cursor:not-allowed}@keyframes completionPulse{0%{transform:scale(1)}50%{box-shadow:0 0 30px var(--accent-green);transform:scale(1.03)}to{transform:scale(1)}}@keyframes confetti{0%{opacity:1;transform:translateY(0) rotate(0deg)}to{opacity:0;transform:translateY(-100px) rotate(2turn)}}@media (max-width:1024px){.lessons-grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}.hero h1{font-size:3rem}}@media (max-width:768px){.header{padding:1rem}.hero{padding:3rem 1rem 2rem}.hero h1{font-size:2.5rem}.hero-subtitle{font-size:1rem;margin-bottom:2rem}.hero-stats{flex-direction:column;gap:1.5rem}.stat-value{font-size:2rem}.lessons-grid{grid-template-columns:1fr}.lessons-section,.progress-section{padding-left:1rem;padding-right:1rem}.progress-section{grid-template-columns:1fr}.progress-card{padding:1.5rem}.progress-header h2,.progress-percentage-arc{font-size:1.2rem}}.flashcard-activity{margin:0 auto;max-width:800px;padding:40px 20px}.flashcard-header{margin-bottom:40px;text-align:center}.flashcard-header h2{color:var(--text-primary);font-family:Space Grotesk,sans-serif;font-size:2rem;margin-bottom:10px}.progress{color:var(--text-muted);font-size:1.1rem}.flashcard{cursor:pointer;height:400px;margin-bottom:40px;perspective:1000px}.flashcard-inner{height:100%;position:relative;transform-style:preserve-3d;transition:transform .6s;width:100%}.flashcard.flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-back,.flashcard-front{align-items:center;-webkit-backface-visibility:hidden;backface-visibility:hidden;border:1px solid var(--bg-tertiary);border-radius:16px;box-shadow:0 8px 32px #0006;display:flex;flex-direction:column;height:100%;justify-content:center;padding:40px;position:absolute;width:100%}.flashcard-front{background:linear-gradient(135deg,#00d9ff26,#667eea26)}.flashcard-back,.flashcard-front{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.flashcard-back{background:linear-gradient(135deg,#667eea26,#764ba226);transform:rotateY(180deg)}.card-label{color:var(--accent-cyan);font-family:Space Grotesk,sans-serif;font-size:.9rem;font-weight:700;letter-spacing:2px;margin-bottom:20px;text-transform:uppercase}.card-content{color:var(--text-primary);font-size:1.5rem;font-weight:500;line-height:1.6;text-align:center}.card-hint{color:var(--text-muted);font-size:.9rem;font-style:italic;margin-top:30px}.flashcard-controls{display:flex;flex-wrap:wrap;gap:20px;justify-content:center}.btn-master,.btn-nav{border:none;border-radius:10px;cursor:pointer;font-family:Space Grotesk,sans-serif;font-size:1rem;font-weight:600;padding:14px 32px;transition:all .3s}.btn-nav{background:var(--bg-secondary);border:2px solid var(--accent-cyan);color:var(--accent-cyan)}.btn-nav:hover{background:var(--bg-tertiary);box-shadow:0 0 20px #00d9ff4d}.btn-master{background:linear-gradient(135deg,var(--accent-green),#0c7);box-shadow:0 4px 15px #00ff884d;color:var(--bg-primary)}.btn-master:hover{box-shadow:0 6px 25px #00ff8880;transform:translateY(-2px)}.btn-put-back{background:var(--bg-secondary);border:2px solid var(--warning);color:var(--warning)}.btn-put-back:hover:not(:disabled){background:var(--bg-tertiary);box-shadow:0 0 20px #ffaa004d}.complete-message{animation:slideIn .5s;background:#00ff881a;border:1px solid var(--accent-green);border-radius:12px;color:var(--text-primary);margin-top:30px;padding:20px;text-align:center}.complete-message p{font-size:1.2rem;font-weight:600;margin-bottom:15px}.btn-restart{background:linear-gradient(135deg,var(--accent-cyan),var(--accent-purple));color:var(--text-primary)}.btn-master:disabled,.btn-put-back:disabled{box-shadow:none;cursor:not-allowed;opacity:.5;transform:none}.btn-master:disabled{background:var(--accent-green)}.btn-put-back:disabled{background:var(--bg-secondary);border-color:var(--warning)}.session-subtitle{color:var(--text-muted);font-size:1rem;margin-top:10px}.session-stats-preview{display:flex;gap:40px;justify-content:center;margin:30px 0}.stat-preview{align-items:center;background:var(--bg-secondary);border:1px solid var(--bg-tertiary);border-radius:12px;display:flex;flex-direction:column;min-width:120px;padding:20px}.stat-number{color:var(--accent-cyan);font-family:Space Grotesk,sans-serif;font-size:2.5rem;font-weight:700}.stat-label{color:var(--text-muted);font-size:.9rem;margin-top:8px}.session-size-selector{grid-gap:20px;display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));margin:40px 0}.session-option{align-items:center;background:var(--bg-secondary);border:2px solid var(--bg-tertiary);border-radius:16px;cursor:pointer;display:flex;flex-direction:column;font-family:Space Grotesk,sans-serif;gap:12px;padding:30px 20px;transition:all .3s}.session-option:hover:not(:disabled){border-color:var(--accent-cyan);box-shadow:0 8px 24px #00d9ff33;transform:translateY(-4px)}.session-option:disabled{cursor:not-allowed;opacity:.4}.session-option.quick-sprint:hover:not(:disabled){border-color:var(--accent-green);box-shadow:0 8px 24px #0f83}.session-option.standard-session:hover:not(:disabled){border-color:var(--accent-cyan);box-shadow:0 8px 24px #00d9ff33}.session-option.deep-practice:hover:not(:disabled){border-color:var(--accent-purple);box-shadow:0 8px 24px #667eea33}.session-option.clear-all:hover:not(:disabled){border-color:var(--warning);box-shadow:0 8px 24px #fa03}.option-icon{font-size:3rem}.option-title{color:var(--text-primary);font-size:1.3rem;font-weight:700}.option-details{color:var(--text-muted);font-size:.9rem}.no-cards-message{background:#00ff881a;border:1px solid var(--accent-green);border-radius:12px;color:var(--text-primary);font-size:1.1rem;padding:40px}.rating-buttons{animation:fadeIn .3s;display:flex;gap:20px;justify-content:center;margin-top:30px}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.rating-btn{align-items:center;border:none;border-radius:12px;cursor:pointer;display:flex;flex:1 1;flex-direction:column;font-family:Space 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