@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap";.flashcard-container{perspective:1000px;cursor:pointer;width:100%;max-width:500px;height:300px;margin:0 auto}.flashcard{width:100%;height:100%;transform-style:preserve-3d;transition:transform .6s cubic-bezier(.4,0,.2,1);position:relative}.flashcard.is-flipped{transform:rotateY(180deg)}.flashcard-face{backface-visibility:hidden;text-align:center;border-radius:16px;flex-direction:column;justify-content:center;align-items:center;width:100%;height:100%;padding:2rem;display:flex;position:absolute}.flashcard-front{-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#8b5cf626;border:none;box-shadow:0 10px 30px #8b5cf633,inset 0 1px #ffffff0d}.flashcard-back{-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#22c55e26;border:none;transform:rotateY(180deg);box-shadow:0 10px 30px #22c55e33,inset 0 1px #ffffff0d}.quiz-container{max-width:800px;margin:0 auto;padding:2rem 1rem}.quiz-card{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#1e293b80;border:1px solid #ffffff1a;border-radius:16px;flex-direction:column;gap:1.5rem;padding:2.5rem;display:flex;box-shadow:0 8px 32px #0003}.quiz-header{border-bottom:1px solid #ffffff1a;justify-content:space-between;align-items:center;margin-bottom:1rem;padding-bottom:1rem;display:flex}.quiz-question{text-align:center;margin-bottom:1.5rem}.quiz-question h2{color:var(--text-primary);margin-bottom:.5rem;font-size:2rem}.quiz-question p{color:var(--text-secondary);font-size:1.2rem}.quiz-options{grid-template-columns:1fr;gap:1rem;display:grid}@media (width>=640px){.quiz-options{grid-template-columns:1fr 1fr}}.quiz-option-btn{color:var(--text-primary);cursor:pointer;text-align:left;background:#ffffff0d;border:2px solid #ffffff1a;border-radius:12px;justify-content:center;align-items:center;padding:1.2rem;font-size:1.1rem;transition:all .2s;display:flex}.quiz-option-btn:hover:not(:disabled){border-color:var(--accent-primary);background:#ffffff1a;transform:translateY(-2px)}.quiz-option-btn.correct{color:#10b981;background:#10b98133;border-color:#10b981}.quiz-option-btn.incorrect{color:#ef4444;background:#ef444433;border-color:#ef4444}.quiz-option-btn:disabled{cursor:not-allowed;opacity:.8}.quiz-feedback{text-align:center;flex-direction:column;align-items:center;gap:1rem;margin-top:1.5rem;animation:.3s fadeIn;display:flex}.quiz-feedback p{font-size:1.2rem;font-weight:600}.quiz-feedback .correct-text{color:#10b981}.quiz-feedback .incorrect-text{color:#ef4444}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.verb-forms-display{justify-content:center;gap:1rem;margin-top:.5rem;display:flex}.verb-form-tag{color:var(--accent-primary);background:#8b5cf633;border-radius:20px;padding:.3rem .8rem;font-size:.9rem;font-weight:500}.tenses-layout{grid-template-columns:250px 1fr;align-items:start;gap:1.5rem;display:grid}@media (width<=768px){.tenses-layout{grid-template-columns:1fr}}.tenses-list{padding:1rem}.tense-group-title{text-transform:uppercase;color:var(--text-muted);letter-spacing:.05em;margin-bottom:.5rem;padding-left:.5rem;font-size:.875rem;font-weight:600}.tense-items{margin:0 0 1.5rem;padding:0;list-style:none}.tense-item{cursor:pointer;color:var(--text-secondary);border-radius:8px;padding:.75rem 1rem;font-weight:500;transition:all .2s}.tense-item:hover{color:var(--text-primary);background:#ffffff0d}.tense-item.active{color:var(--accent-primary);border-left:3px solid var(--accent-primary);background:#8b5cf626}.tense-detail{padding:2rem}.formulas-grid{grid-template-columns:1fr 1fr;gap:1.5rem;display:grid}@media (width<=1024px){.formulas-grid{grid-template-columns:1fr}}.formula-card{background:#0f172a80;border:1px solid #ffffff1a;border-radius:12px;padding:1.5rem}.formula-card.active-voice{border-top:3px solid #3b82f6}.formula-card.passive-voice{border-top:3px solid #ec4899}.formula-row{background:#ffffff08;border-radius:8px;align-items:center;gap:1rem;margin-bottom:1rem;padding:.75rem;display:flex}.formula-row:last-child{margin-bottom:0}.formula-sign{border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:1.1rem;font-weight:700;display:flex}.formula-sign.positive{color:#4ade80;background:#22c55e33}.formula-sign.negative{color:#f87171;background:#ef444433}.formula-sign.question{color:#c084fc;background:#a855f733}.formula-text{letter-spacing:.5px;color:var(--text-primary);font-family:Fira Code,monospace;font-size:.95rem}.badge{border-radius:9999px;padding:.25rem .75rem;font-size:.875rem;font-weight:500}.badge-primary{color:var(--accent-primary);background:#8b5cf633}.badge-secondary{color:#60a5fa;background:#3b82f633}.quiz-option{cursor:pointer;background:#0f172a80;border:1px solid #ffffff1a;border-radius:12px;justify-content:space-between;align-items:center;width:100%;padding:1.25rem;transition:all .2s;display:flex}.quiz-option:not(:disabled):hover{background:#ffffff0d;border-color:#fff3}.quiz-option.correct{background:#22c55e1a;border-color:#22c55e66}.quiz-option.incorrect{background:#ef44441a;border-color:#ef444466}.quiz-option.correct-reveal{background:#22c55e0d;border-style:dashed;border-color:#22c55e66}.quiz-score{color:var(--text-secondary);font-size:1.2rem;font-weight:600}.score-number{color:var(--accent-primary);margin-left:.5rem}.quiz-content-layout{grid-template-columns:1fr 1fr;align-items:start;gap:2rem;display:grid}@media (width<=1024px){.quiz-content-layout{flex-direction:column;grid-template-columns:1fr;display:flex}}.quiz-reference{position:sticky;top:100px}:root{--bg-primary:#0f172a;--bg-secondary:#1e293b;--text-primary:#ede9fe;--text-secondary:#94a3b8;--accent-primary:#8b5cf6;--accent-hover:#7c3aed;--glass-bg:#0f172a66;--glass-border:transparent;--glass-shadow:0 8px 32px 0 #0000005e, inset 0 1px 0 #ffffff0d;--status-new:#475569;--status-learning:#eab308;--status-learned:#22c55e}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-primary);min-height:100vh;font-family:Inter,sans-serif;overflow-x:hidden}.glass-panel{background:var(--glass-bg);-webkit-backdrop-filter:blur(20px);box-shadow:var(--glass-shadow);border:none;border-radius:20px}.h1{margin-bottom:1rem;font-size:2.5rem;font-weight:700}.h2{margin-bottom:.75rem;font-size:2rem;font-weight:600}.h3{margin-bottom:.5rem;font-size:1.5rem;font-weight:600}.text-muted{color:var(--text-secondary)}.btn{cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-family:inherit;font-weight:500;transition:all .2s;display:inline-flex;text-decoration:none!important}.btn-primary{-webkit-backdrop-filter:blur(10px);color:var(--text-primary);background:linear-gradient(135deg,#8b5cf6cc,#6366f1cc);border:1px solid #ffffff1a;box-shadow:0 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#ef44440d}.btn-danger:hover{color:#fff;background:#ef444426;border-color:#ef444499;transform:translateY(-2px);box-shadow:0 12px 40px #ef444440,inset 0 0 20px #ef444426}.form-group{margin-bottom:1.5rem}.form-label{color:var(--text-secondary);margin-bottom:.5rem;font-size:.875rem;display:block}.form-control{width:100%;color:var(--text-primary);background-color:#0f172a66;border:none;border-radius:12px;padding:.75rem 1rem;font-family:inherit;transition:border-color .2s;box-shadow:inset 0 2px 4px #0000004d,0 1px #ffffff0d}.form-control:focus{border-color:var(--accent-primary);outline:none;box-shadow:0 0 0 2px #8b5cf633}@media (width>=769px){.dictionary-row{transition:background-color .2s}.dictionary-row:hover{background-color:#ffffff08}}.action-icon-btn{color:var(--text-secondary);cursor:pointer;background:#ffffff0d;border:1px solid #ffffff1a;border-radius:8px;justify-content:center;align-items:center;width:36px;height:36px;transition:all .2s;display:inline-flex}.action-icon-btn:hover{color:var(--text-primary);background:#ffffff1a;transform:translateY(-2px)}.action-icon-btn.learning-btn:hover{color:var(--status-learning);border-color:#eab3084d;box-shadow:0 4px 10px #eab30833}.action-icon-btn.learned-btn:hover{color:var(--status-learned);border-color:#22c55e4d;box-shadow:0 4px 10px #22c55e33}.app-container{width:100%;min-height:100vh;display:flex}.flex-row{flex-direction:row}.main-content{flex:1;max-width:100%;height:100vh;margin:0 auto;padding:2rem;overflow-y:auto}.animate-fade-in{animation:.4s forwards fadeIn}.status-badge{text-transform:uppercase;border-radius:999px;padding:.25rem .75rem;font-size:.75rem;font-weight:600}.status-new{color:var(--text-primary);background-color:#4755694d;border:none;box-shadow:0 2px 8px #0003}.status-learning{color:var(--status-learning);background-color:#eab3084d;border:none;box-shadow:0 2px 8px #eab30833}.status-learned{color:var(--status-learned);background-color:#22c55e4d;border:none;box-shadow:0 2px 8px #22c55e33}.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-2{gap:.5rem}.gap-4{gap:1rem}.mt-4{margin-top:1rem}.mb-4{margin-bottom:1rem}.mb-6{margin-bottom:1.5rem}.mb-8{margin-bottom:2rem}.text-center{text-align:center}.w-full{width:100%}.stat-card{text-align:center;padding:2rem;transition:all .3s;position:relative;overflow:hidden}.stat-card:hover{transform:translateY(-5px);box-shadow:0 15px 35px #0006,inset 0 1px #ffffff1a}.stat-icon-wrapper{border-radius:50%;justify-content:center;align-items:center;width:64px;height:64px;margin-bottom:1rem;display:inline-flex;box-shadow:inset 0 2px 4px #0003,0 4px 10px #0003}.stat-value{margin-bottom:.25rem;font-size:2.5rem;font-weight:700;line-height:1}.stat-label{font-size:1rem;font-weight:500}.stat-card.new .stat-icon-wrapper{background:#47556933;box-shadow:0 0 20px #47556933}.stat-card.learning .stat-icon-wrapper{background:#eab30833;box-shadow:0 0 20px #eab30833}.stat-card.learned .stat-icon-wrapper{background:#22c55e33;box-shadow:0 0 20px #22c55e33}.progress-bar-container{background-color:#0f172a99;border-radius:12px;width:100%;height:24px;position:relative;overflow:hidden;box-shadow:inset 0 2px 8px #00000080}.progress-bar-fill{background:linear-gradient(90deg,#22c55e,#10b981);border-radius:12px;height:100%;transition:width 1s cubic-bezier(.4,0,.2,1);box-shadow:0 0 20px #22c55e80}.grid{display:grid}.grid-cols-2{grid-template-columns:repeat(2,1fr)}.grid-cols-3{grid-template-columns:repeat(3,1fr)}.sidebar{z-index:100;border-right:1px solid #ffffff0d;border-radius:0;flex-direction:column;flex-shrink:0;width:280px;height:100vh;transition:width .3s cubic-bezier(.4,0,.2,1),transform .4s cubic-bezier(.16,1,.3,1);display:flex;position:sticky;top:0;overflow:hidden}.sidebar.collapsed{width:80px}.sidebar-header{cursor:pointer;border-bottom:1px solid #ffffff0d;align-items:center;gap:1rem;height:80px;padding:1.5rem;transition:background-color .2s;display:flex}.sidebar-header:hover{background:#ffffff0d}.sidebar-logo-text{color:var(--text-primary);white-space:nowrap;font-size:1.5rem;font-weight:700}.sidebar-content{flex:1;padding:1.5rem 0;overflow-y:auto}.sidebar-group-header{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;cursor:pointer;justify-content:space-between;align-items:center;padding:.75rem 1.5rem;font-size:.85rem;font-weight:600;transition:color .2s;display:flex}.sidebar-group-header:hover{color:var(--text-primary)}.sidebar-group-header-collapsed{justify-content:center;padding:1rem 0;display:flex}.sidebar-group-divider{background:#ffffff1a;border-radius:2px;width:24px;height:2px}.sidebar-group-items{flex-direction:column;gap:.25rem;padding:.5rem 1rem;display:flex}.sidebar-group-items.hidden{display:none}.sidebar-item{color:var(--text-secondary);white-space:nowrap;border-radius:8px;align-items:center;gap:1rem;padding:.75rem 1rem;font-weight:500;text-decoration:none;transition:all .2s;display:flex}.sidebar-item-icon{justify-content:center;align-items:center;display:flex}.sidebar-item.active{color:var(--accent-primary);background:#8b5cf633}.sidebar-item:hover:not(.active){color:var(--text-primary);background:#ffffff0d}.sidebar-footer{border-top:1px solid #ffffff0d;flex-direction:column;gap:1rem;padding:1.5rem;display:flex}.sidebar-user{border-bottom:1px solid #ffffff0d;align-items:center;gap:1rem;padding-bottom:1rem;display:flex}.sidebar-user-avatar{width:36px;height:36px;color:var(--accent-primary);background-color:#8b5cf633;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;display:flex}.sidebar-user-name{white-space:nowrap;text-overflow:ellipsis;font-weight:600;overflow:hidden}.sidebar-logout-btn{color:var(--text-secondary);cursor:pointer;text-align:left;background:0 0;border:none;align-items:center;gap:1rem;width:100%;padding:.5rem 0;font-size:1rem;font-weight:500;transition:color .2s;display:flex}.sidebar-logout-btn:hover{color:#ef4444}.collapsed .sidebar-item{justify-content:center;padding:.75rem}.collapsed .sidebar-footer{align-items:center;padding:1.5rem 0}.collapsed .sidebar-user{border-bottom:1px solid #ffffff0d;justify-content:center;width:100%;padding-bottom:1rem}.collapsed .sidebar-logout-btn{justify-content:center;padding:.5rem}.hidden-desktop{display:none}@media (width<=768px){.hidden-desktop{display:flex}.mobile-topbar{-webkit-backdrop-filter:blur(20px);z-index:900;background:#0f172ad9;border-bottom:1px solid #ffffff0d;justify-content:space-between;align-items:center;height:80px;padding:0 1.5rem;position:fixed;top:0;left:0;right:0;box-shadow:0 4px 20px #0000004d}.mobile-logo{cursor:pointer;align-items:center;gap:.75rem;display:flex}.mobile-logo h2{color:var(--text-primary);margin:0;font-size:1.25rem;font-weight:700}.mobile-avatar{width:32px;height:32px;color:var(--accent-primary);cursor:pointer;background-color:#8b5cf633;border-radius:50%;justify-content:center;align-items:center;display:flex}@keyframes fadeInOverlay{0%{opacity:0;-webkit-backdrop-filter:blur();backdrop-filter:blur()}to{opacity:1;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}}.sidebar-overlay{z-index:990;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#00000080;animation:.3s forwards fadeInOverlay;position:fixed;inset:0}.app-container{flex-direction:column}.sidebar{z-index:1000;background:var(--bg-primary);border-bottom:none;border-right:1px solid #ffffff0d;border-radius:0;height:100vh;position:fixed;top:0;bottom:0;left:0;transform:translate(-100%);width:280px!important}.sidebar.mobile-open{transform:translate(0)}.sidebar-header{height:80px;padding:1.5rem}.sidebar-content{padding:1.5rem 0}.sidebar-group-items{flex-direction:column;justify-content:flex-start;padding:.5rem 1rem}.sidebar-item{flex-direction:row;justify-content:flex-start;min-width:auto;padding:.75rem 1rem}.sidebar-footer{flex-direction:column;align-items:flex-start;padding:1.5rem}.sidebar-user{border-bottom:1px solid #ffffff0d;padding-bottom:1rem}.sidebar-logout-btn{width:100%}.main-content{height:auto;padding:100px 1rem 1rem;overflow-y:visible}.grid-cols-3{gap:1rem;grid-template-columns:1fr!important}.action-buttons{flex-direction:column;width:100%}.action-buttons .btn{width:100%}.dict-header{flex-direction:column;gap:1rem;align-items:stretch!important}.dict-filters{flex-direction:column;width:100%}.dict-filters .form-control,.dict-filters select{width:100%!important}.table-responsive{overflow-x:hidden}.table-responsive.glass-panel{box-shadow:none!important;-webkit-backdrop-filter:none!important;background:0 0!important}.responsive-table thead{display:none}.responsive-table tbody tr{-webkit-backdrop-filter:blur(20px);background:#1e293b99;border-radius:24px;flex-direction:column;margin-bottom:1.25rem;padding:1.5rem;display:flex}.responsive-table td{border-bottom:1px solid #ffffff0d;justify-content:space-between;align-items:center;display:flex;text-align:right!important;padding:.75rem 0!important}.responsive-table td:last-child{border-bottom:none}.responsive-table td:before{content:attr(data-label);color:var(--text-secondary);text-align:left;margin-right:1rem;font-weight:500}.responsive-table td.base-cell{border-bottom:1px solid #ffffff1a;flex-direction:column;align-items:center;margin-bottom:.5rem;display:flex;padding-bottom:1rem!important}.responsive-table td.base-cell:before{display:none}.responsive-table td.base-cell .base-text{color:var(--accent-primary);font-size:2rem;line-height:1.2}.responsive-table td.base-cell .pronunciation-text{font-size:1rem!important}}