@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800;900&display=swap";:root{--bg-color:#0f172a;--bg-secondary:#1e293b;--panel-bg:#1e293bb3;--panel-bg-solid:#1e293b;--border-color:#ffffff1a;--border-hover:#ffffff40;--text-main:#f8fafc;--text-muted:#94a3b8;--text-dim:#64748b;--accent-color:#3b82f6;--accent-glow:#3b82f680;--accent-dark:#2563eb;--accent-light:#60a5fa;--srs-new:#06b6d4;--srs-new-glow:#06b6d466;--srs-learning:#ef4444;--srs-learning-glow:#ef444466;--srs-review:#22c55e;--srs-review-glow:#22c55e66;--srs-relearning:#f59e0b;--rating-again:#ef4444;--rating-hard:#f59e0b;--rating-good:#22c55e;--rating-easy:#06b6d4;--success-color:#22c55e;--danger-color:#ef4444;--warning-color:#f59e0b;--info-color:#06b6d4;--purple-accent:#8b5cf6;--radius-sm:6px;--radius-md:10px;--radius-lg:14px;--radius-xl:20px;--radius-full:9999px;--transition-fast:all .15s ease;--transition-base:all .25s cubic-bezier(.2, .8, .2, 1);--transition-slow:all .4s cubic-bezier(.2, .8, .2, 1);--shadow-sm:0 2px 8px #0000004d;--shadow-md:0 4px 15px #0006;--shadow-lg:0 8px 30px #00000080;--shadow-glow:0 0 20px var(--accent-glow)}*,:before,:after{box-sizing:border-box;margin:0;padding:0}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#1e293b80;border-radius:4px}::-webkit-scrollbar-thumb{background:var(--accent-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--accent-dark)}html,body{background-color:var(--bg-color);color:var(--text-main);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-image:radial-gradient(circle at 15%,#3b82f61f 0%,#0000 50%),radial-gradient(circle at 85% 30%,#8b5cf61a 0%,#0000 50%);min-height:100vh;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;overflow-x:hidden}#root{flex-direction:column;min-height:100vh;display:flex}.glass-panel{background:var(--panel-bg);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border-color);border-radius:var(--radius-lg)}.glass-btn{border:1px solid var(--border-color);color:var(--text-main);border-radius:var(--radius-md);cursor:pointer;transition:var(--transition-base);white-space:nowrap;background:#ffffff0d;outline:none;justify-content:center;align-items:center;gap:8px;padding:10px 20px;font-family:Inter,sans-serif;font-size:.875rem;font-weight:600;text-decoration:none;display:inline-flex;position:relative;overflow:hidden}.glass-btn:hover{border-color:var(--border-hover);background:#ffffff1f;transform:translateY(-1px);box-shadow:0 4px 12px #0000004d,inset 0 0 10px #ffffff0d}.glass-btn:active{transform:translateY(0)}.glass-btn.active{color:#fff;background:linear-gradient(135deg,#3b82f640,#2563eb66);border:1px solid #3b82f680;box-shadow:0 4px 12px #3b82f64d}.primary-btn{background:linear-gradient(135deg, var(--accent-color), var(--accent-dark));border:1px solid var(--accent-color);color:#fff;border-radius:var(--radius-md);cursor:pointer;transition:var(--transition-base);white-space:nowrap;outline:none;justify-content:center;align-items:center;gap:8px;padding:10px 24px;font-family:Inter,sans-serif;font-size:.875rem;font-weight:600;display:inline-flex;box-shadow:0 4px 15px #3b82f64d}.primary-btn:hover{background:linear-gradient(135deg, var(--accent-dark), #1d4ed8);border-color:var(--accent-light);transform:translateY(-2px);box-shadow:0 6px 25px #3b82f680}.primary-btn:active{transform:translateY(0)}.primary-btn:disabled{cursor:not-allowed;box-shadow:none;opacity:.6;background:#334155;border-color:#334155;transform:none}.danger-btn{background:linear-gradient(135deg, var(--danger-color), #dc2626);border:1px solid var(--danger-color);color:#fff;border-radius:var(--radius-md);cursor:pointer;transition:var(--transition-base);outline:none;justify-content:center;align-items:center;gap:8px;padding:10px 24px;font-family:Inter,sans-serif;font-size:.875rem;font-weight:600;display:inline-flex;box-shadow:0 4px 15px #ef44444d}.danger-btn:hover{transform:translateY(-2px);box-shadow:0 6px 25px #ef444480}.glass-input{border:1px solid var(--border-color);color:#fff;border-radius:var(--radius-md);transition:var(--transition-base);background:#0f172a99;outline:none;width:100%;padding:10px 14px;font-family:Inter,sans-serif;font-size:.875rem}.glass-input::placeholder{color:#ffffff59}.glass-input:focus{border-color:var(--accent-color);background:#0f172ad9;box-shadow:0 0 15px #3b82f64d}.glass-select{border:1px solid var(--border-color);color:#fff;border-radius:var(--radius-md);transition:var(--transition-base);appearance:none;cursor:pointer;background:#0f172a99 url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e") right 10px center/16px no-repeat;outline:none;width:100%;padding:10px 32px 10px 14px;font-family:Inter,sans-serif;font-size:.875rem}.glass-select:focus{border-color:var(--accent-color);box-shadow:0 0 15px #3b82f64d}.glass-select option{background:var(--bg-color);color:var(--text-main)}textarea.glass-input{resize:vertical;min-height:80px;line-height:1.5}.app-layout{min-height:100vh;display:flex}.sidebar{border-right:1px solid var(--border-color);z-index:100;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#0f172af2;flex-direction:column;width:260px;transition:transform .3s cubic-bezier(.2,.8,.2,1);display:flex;position:fixed;top:0;bottom:0;left:0}.sidebar-header{border-bottom:1px solid var(--border-color);align-items:center;gap:12px;padding:20px;display:flex}.sidebar-logo{background:linear-gradient(135deg, #fff, var(--accent-light));-webkit-text-fill-color:transparent;letter-spacing:.5px;-webkit-background-clip:text;font-family:Outfit,sans-serif;font-size:1.4rem;font-weight:800}.sidebar-logo-icon{background:linear-gradient(135deg, var(--accent-color), var(--purple-accent));border-radius:var(--radius-md);flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;font-size:1.1rem;display:flex}.sidebar-nav{flex-direction:column;flex:1;gap:4px;padding:12px;display:flex;overflow-y:auto}.sidebar-link{border-radius:var(--radius-md);color:var(--text-muted);transition:var(--transition-fast);cursor:pointer;text-align:left;background:0 0;border:none;align-items:center;gap:12px;width:100%;padding:10px 14px;font-size:.9rem;font-weight:500;text-decoration:none;display:flex}.sidebar-link:hover{color:var(--text-main);background:#ffffff0f}.sidebar-link.active{color:var(--text-main);background:linear-gradient(135deg,#3b82f626,#8b5cf61a);font-weight:600}.sidebar-link .link-icon{text-align:center;flex-shrink:0;width:24px;font-size:1.1rem}.sidebar-section-title{color:var(--text-dim);text-transform:uppercase;letter-spacing:1px;padding:16px 14px 6px;font-size:.7rem;font-weight:700}.sidebar-footer{border-top:1px solid var(--border-color);padding:16px}.main-content{flex:1;width:calc(100% - 260px);max-width:1400px;margin-left:260px;padding:24px}.page-header{margin-bottom:28px}.page-header h1{background:linear-gradient(135deg,#fff,#94a3b8);-webkit-text-fill-color:transparent;-webkit-background-clip:text;margin-bottom:6px;font-family:Outfit,sans-serif;font-size:1.8rem;font-weight:800}.page-header p{color:var(--text-muted);font-size:.9rem}.decks-grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px;display:grid}.deck-card{background:var(--panel-bg);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--border-color);border-radius:var(--radius-lg);cursor:pointer;transition:var(--transition-base);padding:20px;position:relative;overflow:hidden}.deck-card:before{content:"";background:linear-gradient(90deg, var(--accent-color), var(--purple-accent));opacity:0;height:3px;transition:opacity .3s;position:absolute;top:0;left:0;right:0}.deck-card:hover{border-color:var(--border-hover);box-shadow:var(--shadow-lg);transform:translateY(-3px)}.deck-card:hover:before{opacity:1}.deck-card-header{justify-content:space-between;align-items:flex-start;margin-bottom:16px;display:flex}.deck-card-name{color:var(--text-main);font-family:Outfit,sans-serif;font-size:1.15rem;font-weight:700}.deck-card-menu{color:var(--text-dim);cursor:pointer;border-radius:var(--radius-sm);transition:var(--transition-fast);background:0 0;border:none;padding:4px;font-size:1.1rem}.deck-card-menu:hover{color:var(--text-main);background:#ffffff14}.deck-card-counts{gap:16px;margin-bottom:16px;display:flex}.deck-count{flex-direction:column;align-items:center;gap:4px;display:flex}.deck-count-number{font-family:Outfit,sans-serif;font-size:1.3rem;font-weight:700}.deck-count-number.new{color:var(--srs-new)}.deck-count-number.learning{color:var(--srs-learning)}.deck-count-number.review{color:var(--srs-review)}.deck-count-label{color:var(--text-dim);text-transform:uppercase;letter-spacing:.5px;font-size:.7rem;font-weight:600}.deck-card-progress{border-radius:var(--radius-full);background:#ffffff0f;height:4px;margin-bottom:16px;overflow:hidden}.deck-card-progress-bar{border-radius:var(--radius-full);background:linear-gradient(90deg, var(--srs-review), var(--accent-color));height:100%;transition:width .5s}.deck-card-actions{gap:8px;display:flex}.deck-study-btn{background:linear-gradient(135deg, var(--accent-color), var(--accent-dark));color:#fff;border-radius:var(--radius-md);cursor:pointer;transition:var(--transition-base);border:none;flex:1;padding:10px;font-family:Inter,sans-serif;font-size:.85rem;font-weight:600}.deck-study-btn:hover{transform:translateY(-1px);box-shadow:0 4px 20px #3b82f680}.deck-action-btn{border:1px solid var(--border-color);color:var(--text-muted);border-radius:var(--radius-md);cursor:pointer;transition:var(--transition-fast);background:#ffffff0d;padding:10px 14px;font-size:.95rem}.deck-action-btn:hover{color:var(--text-main);background:#ffffff1a}.deck-card-new{cursor:pointer;min-height:180px;transition:var(--transition-base);border-radius:var(--radius-lg);background:#ffffff05;border:2px dashed #ffffff1a;flex-direction:column;justify-content:center;align-items:center;gap:12px;display:flex}.deck-card-new:hover{border-color:var(--accent-color);background:#3b82f60d}.deck-card-new-icon{color:var(--text-dim);transition:var(--transition-base);font-size:2rem}.deck-card-new:hover .deck-card-new-icon{color:var(--accent-color);transform:scale(1.1)}.deck-card-new-text{color:var(--text-dim);font-size:.9rem;font-weight:500}.study-container{max-width:700px;margin:0 auto;padding:20px 0}.study-header{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.study-deck-name{color:var(--text-main);font-family:Outfit,sans-serif;font-size:1.2rem;font-weight:700}.study-progress{align-items:center;gap:12px;font-size:.85rem;font-weight:600;display:flex}.study-count{border-radius:var(--radius-full);padding:4px 10px;font-size:.8rem;font-weight:700}.study-count.new{color:var(--srs-new);background:#06b6d426}.study-count.learning{color:var(--srs-learning);background:#ef444426}.study-count.review{color:var(--srs-review);background:#22c55e26}.flashcard-wrapper{perspective:1200px;margin-bottom:24px}.flashcard{width:100%;min-height:350px;transform-style:preserve-3d;cursor:pointer;transition:transform .6s cubic-bezier(.4,0,.2,1);position:relative}.flashcard.flipped{transform:rotateY(180deg)}.flashcard-face{backface-visibility:hidden;background:var(--panel-bg);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid var(--border-color);border-radius:var(--radius-xl);text-align:center;flex-direction:column;justify-content:center;align-items:center;width:100%;min-height:350px;padding:40px;display:flex;position:absolute;top:0;left:0;overflow:auto}.flashcard-front{z-index:2}.flashcard-back{z-index:1;transform:rotateY(180deg)}.flashcard-face-label{text-transform:uppercase;letter-spacing:1px;color:var(--text-dim);font-size:.7rem;font-weight:700;position:absolute;top:16px;left:20px}.flashcard-content{color:var(--text-main);word-break:break-word;font-size:1.3rem;line-height:1.6}.flashcard-content img{border-radius:var(--radius-md);max-width:100%;margin:10px 0}.flashcard-hint{border-radius:var(--radius-md);color:var(--text-dim);background:#ffffff0a;margin-top:20px;padding:10px 16px;font-size:.85rem;font-style:italic}.flashcard-tap-hint{color:var(--text-dim);align-items:center;gap:6px;font-size:.75rem;display:flex;position:absolute;bottom:20px}.rating-buttons{grid-template-columns:repeat(4,1fr);gap:10px;display:grid}.rating-btn{border-radius:var(--radius-md);border:1px solid var(--border-color);cursor:pointer;transition:var(--transition-base);background:#ffffff08;flex-direction:column;align-items:center;gap:4px;padding:14px 8px;font-family:Inter,sans-serif;display:flex}.rating-btn .rating-label{text-transform:uppercase;letter-spacing:.5px;font-size:.8rem;font-weight:700}.rating-btn .rating-interval{color:var(--text-dim);font-size:.7rem}.rating-btn .rating-key{color:var(--text-dim);background:#ffffff0f;border-radius:4px;margin-top:4px;padding:2px 6px;font-size:.65rem}.rating-btn.again{border-color:#ef44444d}.rating-btn.again 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20px}.empty-state-icon{opacity:.6;margin-bottom:16px;font-size:3.5rem}.empty-state h3{color:var(--text-main);margin-bottom:8px;font-family:Outfit,sans-serif;font-size:1.3rem;font-weight:700}.empty-state p{color:var(--text-muted);max-width:400px;margin-bottom:24px;margin-left:auto;margin-right:auto;font-size:.9rem}.toast-container{z-index:2000;flex-direction:column;gap:10px;display:flex;position:fixed;bottom:24px;right:24px}.toast{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-main);box-shadow:var(--shadow-lg);align-items:center;gap:10px;min-width:280px;padding:12px 20px;font-size:.85rem;animation:.3s slideInRight;display:flex}.toast.success{border-left:3px solid var(--success-color)}.toast.error{border-left:3px solid var(--danger-color)}.toast.info{border-left:3px solid var(--info-color)}.sidebar-overlay{z-index:99;background:#00000080;display:none;position:fixed;inset:0}.mobile-header{z-index:98;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid var(--border-color);background:#0f172af2;justify-content:space-between;align-items:center;padding:12px 16px;display:none;position:sticky;top:0}.mobile-menu-btn{color:var(--text-main);cursor:pointer;background:0 0;border:none;padding:4px;font-size:1.4rem}.mobile-header-title{background:linear-gradient(135deg, #fff, var(--accent-light));-webkit-text-fill-color:transparent;-webkit-background-clip:text;font-family:Outfit,sans-serif;font-size:1.1rem;font-weight:800}@media (width<=768px){.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0)}.sidebar-overlay.visible{display:block}.mobile-header{display:flex}.main-content{width:100%;margin-left:0;padding:16px}.decks-grid,.editor-grid{grid-template-columns:1fr}.rating-buttons{grid-template-columns:repeat(2,1fr)}.flashcard-face{min-height:280px;padding:24px}.flashcard-content{font-size:1.1rem}.page-header h1{font-size:1.4rem}.stats-grid{grid-template-columns:repeat(2,1fr)}.session-stats{flex-wrap:wrap}}@media (width<=480px){.deck-card-counts{gap:12px}.study-header{flex-direction:column;align-items:flex-start;gap:10px}}.text-muted{color:var(--text-muted)}.text-dim{color:var(--text-dim)}.text-success{color:var(--success-color)}.text-danger{color:var(--danger-color)}.text-warning{color:var(--warning-color)}.text-info{color:var(--info-color)}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-between{justify-content:space-between}.justify-center{justify-content:center}.gap-sm{gap:8px}.gap-md{gap:16px}.gap-lg{gap:24px}.mt-sm{margin-top:8px}.mt-md{margin-top:16px}.mt-lg{margin-top:24px}.mb-sm{margin-bottom:8px}.mb-md{margin-bottom:16px}.mb-lg{margin-bottom:24px}.w-full{width:100%}.text-center{text-center:center}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.auth-page{background:var(--bg-color);min-height:100vh;padding:var(--spacing-lg);background-image:radial-gradient(at 20%,#3b82f626 0%,#0000 60%),radial-gradient(at 80% 20%,#8b5cf61f 0%,#0000 50%),radial-gradient(at 60% 80%,#06b6d414 0%,#0000 50%);justify-content:center;align-items:center;display:flex}.auth-card{width:100%;max-width:420px;padding:var(--spacing-2xl);border-radius:var(--radius-xl);gap:var(--spacing-lg);flex-direction:column;display:flex}.auth-logo{text-align:center;align-items:center;gap:var(--spacing-xs);flex-direction:column;display:flex}.auth-logo-icon{filter:drop-shadow(0 0 20px #3b82f699);font-size:3rem;line-height:1;animation:2s ease-in-out infinite pulse-glow}@keyframes pulse-glow{0%,to{filter:drop-shadow(0 0 20px #3b82f699)}50%{filter:drop-shadow(0 0 30px #8b5cf6cc)}}.auth-logo-text{background:linear-gradient(135deg, var(--accent-color), var(--purple-accent));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin:0;font-family:Outfit,sans-serif;font-size:2rem;font-weight:800}.auth-logo-sub{color:var(--text-muted);margin:0;font-size:.875rem}.auth-tabs{gap:var(--spacing-xs);border-radius:var(--radius-md);background:#ffffff0a;padding:4px;display:flex}.auth-tab{padding:var(--spacing-sm) var(--spacing-md);border-radius:calc(var(--radius-md) - 2px);color:var(--text-muted);cursor:pointer;background:0 0;border:none;flex:1;font-size:.875rem;font-weight:500;transition:all .2s}.auth-form{gap:var(--spacing-md);flex-direction:column;display:flex}.form-group{gap:var(--spacing-xs);flex-direction:column;display:flex}.form-group label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-size:.8125rem;font-weight:500}.form-input{border:1px solid var(--border-color);border-radius:var(--radius-md);width:100%;color:var(--text-main);box-sizing:border-box;background:#ffffff0f;padding:.75rem 1rem;font-family:inherit;font-size:.9375rem;transition:all .2s}.form-input:focus{border-color:var(--accent-color);background:#3b82f614;outline:none;box-shadow:0 0 0 3px #3b82f626}.form-input::placeholder{color:var(--text-dim)}.btn-full{justify-content:center;width:100%;padding:.85rem;font-size:1rem}.auth-error{border-radius:var(--radius-md);padding:var(--spacing-sm) var(--spacing-md);color:#fca5a5;align-items:center;gap:var(--spacing-xs);background:#ef44441f;border:1px solid #ef44444d;font-size:.875rem;display:flex}.auth-footer{text-align:center;color:var(--text-muted);margin:0;font-size:.875rem}.link-btn{color:var(--accent-light);font-size:inherit;cursor:pointer;background:0 0;border:none;padding:0;text-decoration:underline}.link-btn:hover{color:var(--accent-color)}.spinner-sm{border:2px solid #ffffff4d;border-top-color:#fff;border-radius:50%;width:18px;height:18px;animation:.7s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.auth-page{background:radial-gradient(circle at 50% 0%, var(--bg-secondary), var(--bg-color));justify-content:center;align-items:center;min-height:100vh;padding:2rem;display:flex}.auth-card{border-radius:var(--radius-xl);flex-direction:column;gap:2rem;width:100%;max-width:440px;padding:3rem 2.5rem;animation:.6s cubic-bezier(.2,.8,.2,1) forwards slideUp;display:flex}.auth-logo{text-align:center;flex-direction:column;align-items:center;gap:.5rem;display:flex}.auth-logo-icon{background:linear-gradient(135deg, var(--accent-light), var(--accent-color));-webkit-text-fill-color:transparent;filter:drop-shadow(0 0 10px var(--accent-glow));-webkit-background-clip:text;margin-bottom:.5rem;font-size:3rem}.auth-logo-text{letter-spacing:-.03em;color:var(--text-main);font-family:Outfit,sans-serif;font-size:2rem;font-weight:800}.auth-logo-sub{color:var(--text-muted);font-size:.95rem}.auth-tabs{border-radius:var(--radius-md);background:#0f172a66;gap:.35rem;padding:.35rem;display:flex}.auth-tab{color:var(--text-muted);border-radius:calc(var(--radius-md) - 2px);cursor:pointer;transition:var(--transition-fast);background:0 0;border:none;flex:1;padding:.75rem;font-family:inherit;font-size:.95rem;font-weight:500}.auth-tab:hover{color:var(--text-main)}.auth-tab.active{background:var(--panel-bg-solid);color:var(--text-main);box-shadow:var(--shadow-sm)}.auth-form{flex-direction:column;gap:1.25rem;display:flex}.form-group{flex-direction:column;gap:.5rem;display:flex}.form-group label{color:var(--text-muted);margin-left:.25rem;font-size:.85rem;font-weight:500}.form-input{border:1px solid var(--border-color);border-radius:var(--radius-md);width:100%;color:var(--text-main);transition:var(--transition-base);background:#0f172a66;padding:.875rem 1rem;font-family:inherit;font-size:1rem}.form-input:focus{border-color:var(--accent-color);box-shadow:0 0 0 3px var(--accent-glow);background:#0f172a99;outline:none}.auth-error{border-left:3px solid var(--danger-color);color:#fca5a5;background:#ef44441a;border-radius:4px;align-items:center;gap:.75rem;padding:.875rem 1rem;font-size:.9rem;display:flex}.auth-footer{text-align:center;color:var(--text-muted);font-size:.9rem}.link-btn{color:var(--accent-light);font-family:inherit;font-size:inherit;cursor:pointer;background:0 0;border:none;padding:0;font-weight:500}.link-btn:hover{text-decoration:underline}.rating-buttons{flex-wrap:wrap;justify-content:center;gap:1rem;width:100%;margin-top:2rem;display:flex}.rating-btn{border-radius:var(--radius-lg);border:1px solid var(--border-color);color:var(--text-main);cursor:pointer;transition:var(--transition-base);background:#1e293b99;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:.25rem;min-width:110px;max-width:160px;padding:1rem 1.5rem;display:flex}.rating-btn:hover{transform:translateY(-2px)}.rating-btn.again{border-bottom:4px solid var(--rating-again)}.rating-btn.again:hover{border-color:var(--rating-again);background:#ef44441a;box-shadow:0 4px 15px #ef444433}.rating-btn.hard{border-bottom:4px solid var(--rating-hard)}.rating-btn.hard:hover{border-color:var(--rating-hard);background:#f59e0b1a;box-shadow:0 4px 15px #f59e0b33}.rating-btn.good{border-bottom:4px solid var(--rating-good)}.rating-btn.good:hover{border-color:var(--rating-good);background:#22c55e1a;box-shadow:0 4px 15px #22c55e33}.rating-btn.easy{border-bottom:4px solid var(--rating-easy)}.rating-btn.easy:hover{border-color:var(--rating-easy);background:#06b6d41a;box-shadow:0 4px 15px #06b6d433}.rating-interval{color:var(--text-main);font-size:1.25rem;font-weight:700}.rating-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-size:.85rem;font-weight:600}.rating-key{color:var(--text-dim);margin-top:.25rem;font-size:.75rem}