.sidebar{position:fixed;left:0;top:0;height:100vh;width:var(--sidebar-width);background:var(--bg-chrome);border-right:1px solid var(--border);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);display:flex;flex-direction:column;gap:var(--space-4);padding:var(--space-5);z-index:100;transition:width var(--transition-base),transform var(--transition-base);overflow:hidden}.sidebar--collapsed{width:72px}.sidebar--collapsed .sidebar-logo__text,.sidebar--collapsed .sidebar-nav__label,.sidebar--collapsed .sidebar-nav__item span,.sidebar--collapsed .sidebar-xp{opacity:0;pointer-events:none;width:0;overflow:hidden}.sidebar--collapsed .sidebar-collapse-btn{margin-left:0}.sidebar-collapse-btn{margin-left:auto;flex-shrink:0}.sidebar-logo{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-2);min-height:48px}.sidebar-logo__icon{font-size:28px;flex-shrink:0;filter:drop-shadow(0 0 12px rgba(124,58,237,.6))}.sidebar-logo__text{font-size:1.1rem;font-weight:800;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;white-space:nowrap;transition:opacity var(--transition-base),width var(--transition-base)}.sidebar-xp{padding:var(--space-4);border-radius:var(--radius-md);transition:opacity var(--transition-base)}.sidebar-xp__header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-2)}.sidebar-xp__level{display:flex;align-items:center;gap:var(--space-1);font-size:.8rem;font-weight:700;color:var(--accent-violet-light)}.xp-icon{color:var(--accent-amber)}.sidebar-xp__points{font-size:.75rem;color:var(--text-muted)}.sidebar-xp__stats{display:flex;justify-content:space-between;margin-top:var(--space-2)}.xp-stat{display:flex;align-items:center;gap:var(--space-1);font-size:.7rem;color:var(--text-muted)}.sidebar-nav{display:flex;flex-direction:column;gap:var(--space-1);flex:1}.sidebar-nav__label{font-size:.65rem;font-weight:700;color:var(--text-muted);letter-spacing:.1em;padding:var(--space-2) var(--space-3) var(--space-1);transition:opacity var(--transition-base)}.sidebar-nav__item{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-3);border-radius:var(--radius-md);color:var(--text-secondary);text-decoration:none;font-size:.875rem;font-weight:500;transition:all var(--transition-fast);cursor:pointer;background:none;border:none;width:100%;min-height:44px;white-space:nowrap}.sidebar-nav__item svg{flex-shrink:0}.sidebar-nav__item:hover{color:var(--text-primary);background:var(--bg-card)}.sidebar-nav__item--active{color:var(--accent-violet-light)!important;background:#7c3aed26!important;border:1px solid rgba(124,58,237,.2)}.sidebar-bottom{border-top:1px solid var(--border);padding-top:var(--space-4)}.sidebar-backdrop{display:none}@media (max-width: 1024px){.sidebar{position:fixed;left:0;top:0;height:100vh;width:var(--sidebar-width);background:var(--bg-chrome);z-index:200;transition:transform var(--transition-base)}.sidebar--collapsed{width:var(--sidebar-width);transform:translate(-100%)}.sidebar--open{width:256px;box-shadow:var(--shadow-lg)}.sidebar-backdrop{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background:var(--overlay);z-index:199;animation:fadeIn .2s ease}}@media (max-width: 768px){.sidebar{padding:var(--space-4);gap:var(--space-3)}.sidebar--open{width:256px;transform:translate(0)}.sidebar-logo{min-height:40px;padding:var(--space-2)}.sidebar-logo__icon{font-size:24px}.sidebar-logo__text{font-size:1rem}.sidebar-nav__item{padding:var(--space-2) var(--space-2);font-size:.8rem;min-height:40px;gap:var(--space-2)}.sidebar-xp{padding:var(--space-3)}.sidebar-xp__header{margin-bottom:var(--space-1)}.sidebar-xp__level{font-size:.7rem}.sidebar-xp__points{font-size:.65rem}.xp-stat{font-size:.6rem}}@media (max-width: 480px){.sidebar{padding:var(--space-3);gap:var(--space-2)}.sidebar--open{width:calc(100% - var(--space-6));max-width:240px}.sidebar-collapse-btn{width:32px;height:32px}.sidebar-nav__item{padding:var(--space-1) var(--space-2);font-size:.75rem;min-height:36px}}.topbar{height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 var(--space-8);border-bottom:1px solid var(--border);background:var(--bg-chrome-soft);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);position:sticky;top:0;z-index:50}.topbar-left{display:flex;align-items:center;gap:var(--space-4)}.topbar .topbar-hamburger{display:none;width:40px;height:40px;flex-shrink:0}@media (max-width: 1024px){.topbar .topbar-hamburger{display:inline-flex}}.topbar-title{font-size:1.25rem;font-weight:700;color:var(--text-primary);line-height:1.2}.topbar-subtitle{font-size:.8rem;color:var(--text-muted);margin-top:2px}.topbar-right{display:flex;align-items:center;gap:var(--space-3)}.topbar-btn{width:36px;height:36px;border-radius:var(--radius-sm)}.topbar-avatar{width:36px;height:36px;border-radius:var(--radius-full);background:var(--gradient-primary);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.875rem;cursor:pointer;box-shadow:var(--shadow-glow-violet);flex-shrink:0}.topbar-avatar-container{position:relative}.topbar-avatar-container .topbar-avatar{border:none;background:var(--gradient-primary);transition:all var(--transition-fast)}.topbar-avatar-container .topbar-avatar:hover{transform:scale(1.05);box-shadow:var(--shadow-glow-violet-lg)}.topbar-menu{position:absolute;top:100%;right:0;margin-top:var(--space-2);background:var(--bg-modal);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);min-width:200px;z-index:100;animation:slideDown .2s ease-out}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.topbar-menu-header{padding:var(--space-3) var(--space-4);border-bottom:1px solid var(--border);color:var(--text-primary);font-weight:600;font-size:.9rem}.topbar-menu-item{width:100%;padding:var(--space-3) var(--space-4);background:none;border:none;color:var(--text-secondary);text-align:left;cursor:pointer;display:flex;align-items:center;gap:var(--space-2);font-size:.9rem;transition:all var(--transition-fast)}.topbar-menu-item:hover{background:#7c3aed1a;color:var(--accent-violet)}@media (max-width: 768px){.topbar{padding:0 var(--space-4);height:64px}.topbar-title{font-size:1.1rem}.topbar-subtitle{font-size:.7rem}.topbar-btn{width:32px;height:32px}.topbar-avatar{width:32px;height:32px;font-size:.8rem}}@media (max-width: 480px){.topbar{padding:0 var(--space-3);height:56px}.topbar-left{gap:var(--space-2)}.topbar-title{font-size:.95rem}.topbar-subtitle{display:none}.topbar-right{gap:var(--space-2)}.topbar-btn{width:28px;height:28px}.topbar-avatar{width:28px;height:28px;font-size:.7rem}.topbar-menu{min-width:160px;right:calc(var(--space-2) * -1)}}.heatmap{overflow-x:auto}.heatmap__month-row{display:grid;grid-template-columns:repeat(52,14px);gap:3px;margin-bottom:4px;position:relative;height:16px}.heatmap__month{font-size:.65rem;color:var(--text-muted);white-space:nowrap}.heatmap__grid{display:flex;gap:3px}.heatmap__week{display:flex;flex-direction:column;gap:3px}.heatmap__day{width:11px;height:11px;border-radius:2px;transition:transform var(--transition-fast);cursor:default}.heatmap__day:hover{transform:scale(1.4)}.heatmap__day--0{background:#ffffff0d}.heatmap__day--1{background:#7c3aed4d}.heatmap__day--2{background:#7c3aed8c}.heatmap__day--3{background:#7c3aedcc}.heatmap__day--4{background:#7c3aed;box-shadow:0 0 6px #7c3aed80}.heatmap__legend{display:flex;align-items:center;gap:4px;margin-top:var(--space-3);justify-content:flex-end}.heatmap__legend-label{font-size:.65rem;color:var(--text-muted)}@media (max-width: 768px){.heatmap__day{width:9px;height:9px}.heatmap__month{font-size:.6rem}}@media (max-width: 480px){.heatmap__day{width:8px;height:8px}.heatmap__legend-label{font-size:.65rem}.heatmap__day:hover{transform:none}}.pomodoro{display:flex;flex-direction:column;align-items:center;gap:var(--space-4)}.pomodoro__tabs{display:flex;gap:var(--space-2);background:var(--bg-card);border-radius:var(--radius-full);padding:4px}.pomodoro__tab{display:flex;align-items:center;gap:var(--space-1);padding:var(--space-2) var(--space-3);border-radius:var(--radius-full);border:none;background:transparent;color:var(--text-muted);font-size:.75rem;font-family:var(--font-family);font-weight:500;cursor:pointer;transition:all var(--transition-fast)}.pomodoro__tab--active{background:var(--tab-color, var(--accent-violet));color:#fff;box-shadow:0 2px 8px #0000004d}.pomodoro__ring-wrap{position:relative;width:180px;height:180px}.pomodoro__ring{width:100%;height:100%;transform:rotate(-90deg)}.pomodoro__ring-bg{fill:none;stroke:#ffffff0f;stroke-width:6}.pomodoro__ring-fill{fill:none;stroke-width:6;stroke-linecap:round;transition:stroke-dashoffset 1s linear,stroke .5s ease;filter:drop-shadow(0 0 6px currentColor)}.pomodoro__time{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px}.pomodoro__time-display{font-size:2.2rem;font-weight:800;font-variant-numeric:tabular-nums;line-height:1}.pomodoro__mode-label{font-size:.7rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.08em}.pomodoro__controls{display:flex;align-items:center;gap:var(--space-4)}.pomodoro__reset{width:40px;height:40px;border-radius:var(--radius-full)}.pomodoro__play-btn{width:56px;height:56px;border-radius:var(--radius-full);border:none;background:var(--play-color, var(--accent-violet));color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition-fast);box-shadow:0 0 20px #7c3aed66}.pomodoro__play-btn:hover{transform:scale(1.1);box-shadow:0 0 30px #7c3aed99}.pomodoro__sessions{display:flex;gap:var(--space-1)}.pomodoro__dot{width:8px;height:8px;border-radius:var(--radius-full);background:#ffffff26;transition:background var(--transition-fast)}.pomodoro__dot--done{background:var(--accent-violet);box-shadow:0 0 6px var(--accent-violet-glow)}@media (max-width: 768px){.pomodoro{gap:var(--space-3)}.pomodoro__tab{padding:var(--space-1) var(--space-2);font-size:.7rem}.pomodoro__ring-wrap{width:160px;height:160px}.pomodoro__time-display{font-size:1.8rem}.pomodoro__play-btn{width:48px;height:48px}}@media (max-width: 640px){.pomodoro{gap:var(--space-2)}.pomodoro__ring-wrap{width:140px;height:140px}.pomodoro__time-display{font-size:1.5rem}.pomodoro__mode-label{font-size:.6rem}.pomodoro__tab{padding:var(--space-1) var(--space-2);font-size:.65rem}.pomodoro__controls{gap:var(--space-3)}.pomodoro__reset{width:36px;height:36px}.pomodoro__play-btn{width:44px;height:44px}.pomodoro__sessions{gap:4px}.pomodoro__dot{width:6px;height:6px}}@media (max-width: 480px){.pomodoro__ring-wrap{width:120px;height:120px}.pomodoro__ring{stroke-width:5}.pomodoro__time-display{font-size:1.25rem}.pomodoro__play-btn{width:40px;height:40px;font-size:.8rem}}.streak-goal{display:flex;flex-direction:column;align-items:center;gap:var(--space-4)}.streak-goal__streak{display:flex;align-items:center;gap:var(--space-3);align-self:stretch;padding:var(--space-3) var(--space-4);border:1px solid var(--border);border-radius:var(--radius-md);background:var(--bg-card)}.streak-goal__flame{color:var(--text-muted);flex-shrink:0}.streak-goal__flame--lit{color:var(--accent-amber);filter:drop-shadow(0 0 8px rgba(245,158,11,.45))}.streak-goal__streak-num{font-size:1.5rem;font-weight:800;line-height:1}.streak-goal__streak-label{font-size:.72rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;margin-top:2px}.streak-goal__ring-wrap{position:relative;width:150px;height:150px}.streak-goal__ring{width:100%;height:100%;transform:rotate(-90deg)}.streak-goal__ring-track{fill:none;stroke:var(--bg-card-hover);stroke-width:8}.streak-goal__ring-fill{fill:none;stroke-width:8;stroke-linecap:round;transition:stroke-dashoffset .6s ease,stroke .3s ease}.streak-goal__ring-center{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center;pointer-events:none}.streak-goal__count{font-size:1.35rem;font-weight:800;line-height:1}.streak-goal__count-sep{color:var(--text-muted);margin:0 2px;font-weight:600}.streak-goal__count-label{font-size:.7rem;color:var(--text-muted);margin-top:4px}.streak-goal__footer{display:flex;align-items:center;gap:var(--space-2);font-size:.8rem;color:var(--text-secondary)}.streak-goal__input{width:84px;padding:var(--space-1) var(--space-2);font-size:.85rem}@media (max-width: 640px){.streak-goal__ring-wrap{width:120px;height:120px}.streak-goal__count{font-size:1.15rem}.streak-goal__streak-num{font-size:1.3rem}}.dashboard__hero{padding:var(--space-8);border-radius:var(--radius-xl);display:flex;align-items:center;justify-content:space-between;gap:var(--space-8);position:relative;overflow:hidden}.dashboard__hero:before{content:"";position:absolute;top:-50%;right:-10%;width:300px;height:300px;background:radial-gradient(circle,rgba(124,58,237,.2) 0%,transparent 70%);pointer-events:none}.dashboard__hero-text h2{font-size:1.75rem;font-weight:800;margin-bottom:var(--space-3)}.dashboard__hero-text p{color:var(--text-secondary);margin-bottom:var(--space-5);font-size:1rem}.highlight{color:var(--accent-violet-light);font-weight:700}.dashboard__hero-visual{display:flex;flex-direction:column;align-items:center;gap:var(--space-3);flex-shrink:0}.hero-brain{font-size:5rem;filter:drop-shadow(0 0 30px rgba(124,58,237,.5))}.hero-xp-badge{display:flex;align-items:center;gap:var(--space-1);background:var(--badge-amber-bg);border:1px solid rgba(245,158,11,.3);border-radius:var(--radius-full);padding:var(--space-2) var(--space-3);font-size:.8rem;font-weight:700;color:var(--badge-amber-text)}.stat-card{padding:var(--space-5);display:flex;align-items:center;gap:var(--space-4);transition:all .3s ease}.stat-card:hover{transform:translateY(-4px)}.stat-card__icon{width:48px;height:48px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;flex-shrink:0}.stat-card__info{display:flex;flex-direction:column}.stat-card__value{font-size:1.75rem;font-weight:800;line-height:1}.stat-card__label{font-size:.75rem;color:var(--text-muted);margin-top:4px;font-weight:500}.dashboard__grid{display:grid;grid-template-columns:1fr 380px;gap:var(--space-6)}.dashboard__section{padding:var(--space-6)}.due-deck-item{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);cursor:pointer;transition:background var(--transition-fast);border:1px solid transparent}.due-deck-item:hover{background:var(--bg-card);border-color:var(--border)}.due-deck__icon{font-size:1.5rem}.due-deck__info{flex:1;display:flex;flex-direction:column;gap:2px}.due-deck__name{font-size:.9rem;font-weight:600}.due-deck__count{font-size:.75rem;color:var(--accent-amber);font-weight:500}.dashboard__quote{display:flex;align-items:flex-start;gap:var(--space-4);padding:var(--space-5) var(--space-6)}.dashboard__quote-text{font-size:.92rem;color:var(--text-secondary);font-style:italic;line-height:1.5;margin-bottom:4px}.dashboard__quote-author{font-size:.78rem;color:var(--text-muted);font-weight:600}@media (max-width: 1200px){.dashboard__grid{grid-template-columns:1fr}}@media (max-width: 768px){.dashboard__hero{padding:var(--space-6);gap:var(--space-6)}.dashboard__hero:before{width:200px;height:200px;top:-30%;right:-5%}.dashboard__hero-text h2{font-size:1.5rem}.dashboard__hero-text p{font-size:.9rem;margin-bottom:var(--space-3)}.hero-brain{font-size:4rem}.dashboard__section{padding:var(--space-4)}.dashboard__grid{gap:var(--space-4)}.stat-card{padding:var(--space-4);gap:var(--space-3)}.stat-card__value{font-size:1.5rem}.stat-card__icon{width:40px;height:40px}.due-deck-item{padding:var(--space-2) var(--space-3)}.due-deck__name{font-size:.85rem}}@media (max-width: 640px){.dashboard__hero{padding:var(--space-4);flex-direction:column;text-align:center;gap:var(--space-4)}.dashboard__hero:before{width:150px;height:150px}.dashboard__hero-visual{width:100%}.dashboard__hero-text h2{font-size:1.25rem}.dashboard__hero-text p{font-size:.8rem}.hero-brain{font-size:3rem}.stat-card{padding:var(--space-3);gap:var(--space-2)}.stat-card__icon{width:36px;height:36px}.stat-card__value{font-size:1.25rem}.stat-card__label{font-size:.7rem}}@media (max-width: 480px){.dashboard__hero{padding:var(--space-3)}.dashboard__hero-text h2{font-size:1.1rem}.hero-brain{font-size:2.5rem}.stat-card{padding:var(--space-2);gap:var(--space-1)}.stat-card__value{font-size:1.1rem}}.deck-card{padding:0;overflow:hidden;cursor:pointer;display:flex;flex-direction:column;position:relative;transition:all .3s ease}.deck-card:hover{transform:translateY(-6px);box-shadow:0 20px 40px #0006,0 0 0 1px var(--border-accent)}.deck-card__accent{height:4px;background:var(--deck-color, var(--gradient-primary));width:100%}.deck-card__header{display:flex;align-items:flex-start;justify-content:space-between;padding:var(--space-5) var(--space-5) 0}.deck-card__icon{font-size:2rem;line-height:1;filter:drop-shadow(0 2px 8px rgba(0,0,0,.3))}.deck-card__menu-wrap{position:relative}.deck-card__menu-btn{opacity:.5}.deck-card:hover .deck-card__menu-btn{opacity:1}.deck-card__dropdown{position:absolute;right:0;top:100%;background:#1a2340;border:1px solid var(--border-accent);border-radius:var(--radius-md);padding:var(--space-2);z-index:10;min-width:130px;box-shadow:var(--shadow-lg)}.deck-card__dropdown button{display:flex;align-items:center;gap:var(--space-2);width:100%;padding:var(--space-2) var(--space-3);background:none;border:none;color:var(--text-secondary);font-size:.85rem;font-family:var(--font-family);cursor:pointer;border-radius:var(--radius-sm);transition:all var(--transition-fast)}.deck-card__dropdown button:hover{background:var(--bg-card);color:var(--text-primary)}.deck-card__dropdown button.danger:hover{color:var(--accent-rose)}.deck-card__body{padding:var(--space-4) var(--space-5);flex:1}.deck-card__name{font-size:1.05rem;font-weight:700;color:var(--text-primary);margin-bottom:var(--space-2)}.deck-card__desc{font-size:.8rem;color:var(--text-muted);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.deck-card__tags{display:flex;gap:var(--space-1);flex-wrap:wrap;margin-top:var(--space-3)}.deck-card__stats{display:flex;align-items:center;gap:var(--space-4);padding:0 var(--space-5) var(--space-3)}.deck-stat{display:flex;align-items:center;gap:var(--space-1);font-size:.75rem;color:var(--text-muted);font-weight:500}.deck-card__progress{padding:0 var(--space-5) var(--space-4);display:flex;align-items:center;gap:var(--space-3)}.deck-card__progress-label{font-size:.65rem;color:var(--text-muted);white-space:nowrap}.deck-card__study-btn{margin:0 var(--space-5) var(--space-5);justify-content:center}@media (max-width: 768px){.deck-card:hover{transform:translateY(-3px)}.deck-card__icon{font-size:1.5rem}.deck-card__name{font-size:.95rem}.deck-card__desc{font-size:.75rem}.deck-card__header{padding:var(--space-4) var(--space-4) 0}.deck-card__body{padding:var(--space-3) var(--space-4)}.deck-card__stats{padding:0 var(--space-4) var(--space-2)}.deck-stat{font-size:.7rem}.deck-card__progress{padding:0 var(--space-4) var(--space-3);gap:var(--space-2)}.deck-card__study-btn{margin:0 var(--space-4) var(--space-4);font-size:.9rem;padding:var(--space-2) var(--space-3)}}@media (max-width: 640px){.deck-card__icon{font-size:1.25rem}.deck-card__name{font-size:.9rem}.deck-card__header{padding:var(--space-3) var(--space-3) 0}.deck-card__body{padding:var(--space-2) var(--space-3)}.deck-card__dropdown{min-width:120px}.deck-card__stats{padding:0 var(--space-3) var(--space-2);gap:var(--space-2)}.deck-card__progress{padding:0 var(--space-3) var(--space-2)}.deck-card__study-btn{margin:0 var(--space-3) var(--space-3);font-size:.8rem}}@media (max-width: 480px){.deck-card{border-radius:var(--radius-lg)}.deck-card__header{padding:var(--space-2) var(--space-3) 0}.deck-card__body{padding:var(--space-2) var(--space-3)}.deck-card__stats{flex-wrap:wrap;gap:var(--space-1)}.deck-card__study-btn{margin:0 var(--space-3) var(--space-2);min-height:40px}}.search-box{display:flex;align-items:center;gap:var(--space-3);background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-md);padding:var(--space-2) var(--space-4);min-width:260px;transition:border-color var(--transition-fast)}.search-box:focus-within{border-color:var(--accent-violet)}.search-input{background:none;border:none;outline:none;color:var(--text-primary);font-family:var(--font-family);font-size:.875rem;flex:1}.search-input::placeholder{color:var(--text-muted)}.icon-picker{display:flex;flex-wrap:wrap;gap:var(--space-2)}.icon-btn{width:40px;height:40px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg-card);font-size:1.2rem;cursor:pointer;transition:all var(--transition-fast);display:flex;align-items:center;justify-content:center}.icon-btn:hover,.icon-btn--active{border-color:var(--accent-violet);background:#7c3aed26;transform:scale(1.1)}.color-picker{display:flex;gap:var(--space-2);flex-wrap:wrap}.color-btn{width:32px;height:32px;border-radius:var(--radius-full);border:2px solid transparent;cursor:pointer;transition:all var(--transition-fast)}.color-btn:hover{transform:scale(1.15);box-shadow:0 0 10px currentColor}.color-btn--active{border-color:#fff;transform:scale(1.2);box-shadow:0 0 12px #fff6}@media (max-width: 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var(--space-4)}.card-item__srs{display:flex;gap:var(--space-4);font-size:.75rem;color:var(--text-muted)}.card-item__srs strong{color:var(--text-secondary)}select.input{cursor:pointer;-webkit-appearance:none;-moz-appearance:none;appearance:none}@media (max-width: 768px){.deck-detail__header{gap:var(--space-3)}.deck-detail__title-row{flex-wrap:wrap;gap:var(--space-3)}.deck-detail__icon{font-size:2rem}.deck-detail__name{font-size:1.25rem}.deck-detail__actions{width:100%;flex-wrap:wrap}.deck-detail__stats{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-3)}.card-item__header{flex-wrap:wrap;gap:var(--space-2)}.card-item__front{font-size:.9rem}}@media (max-width: 480px){.card-item{padding:var(--space-3)}.card-item__meta,.card-item__srs{font-size:.7rem}}.flashcard-wrapper{display:flex;flex-direction:column;align-items:center;gap:var(--space-8);width:100%}.flashcard{width:100%;max-width:640px;perspective:1200px;cursor:pointer;transition:filter 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#06b6d41a;transform:rotateY(180deg);min-height:280px}.flashcard__tag{position:absolute;top:var(--space-4);left:var(--space-5);display:flex;gap:var(--space-2);flex-wrap:wrap}.flashcard__label{font-size:.65rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--text-muted)}.flashcard__text{font-size:clamp(1rem,2vw,1.25rem);font-weight:600;color:var(--text-primary);line-height:1.65;max-height:200px;overflow-y:auto;word-break:break-word;scrollbar-width:thin}.flashcard__text--answer{font-size:clamp(.9rem,1.8vw,1.1rem)}.flashcard__hint-btn{margin-top:var(--space-1);color:var(--accent-amber)!important}.flashcard__hint{background:#f59e0b1a;border:1px solid rgba(245,158,11,.25);border-radius:var(--radius-sm);padding:var(--space-2) var(--space-4);font-size:.82rem;color:var(--badge-amber-text);max-width:90%}.flashcard__tap-hint{position:absolute;bottom:var(--space-4);left:50%;transform:translate(-50%);display:flex;align-items:center;gap:4px;font-size:.72rem;color:var(--text-muted);white-space:nowrap;pointer-events:none;list-style:none;-webkit-user-select:none;user-select:none}.flashcard__grades{width:100%;max-width:640px;display:flex;flex-direction:column;align-items:center;gap:var(--space-4)}.flashcard__grades-label{font-size:.85rem;color:var(--text-secondary);font-weight:500}.flashcard__grade-btns{display:flex;gap:var(--space-3);width:100%}.flashcard__grade-btn{flex:1;padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);border:1px solid;font-family:var(--font-family);font-size:.9rem;font-weight:700;cursor:pointer;transition:all var(--transition-fast);min-height:48px}.flashcard__grade-btn:hover{transform:translateY(-3px);filter:brightness(1.2);box-shadow:0 8px 20px #0000004d}.flashcard__grade-btn:active{transform:translateY(0)}@media (max-width: 768px){.flashcard{max-width:100%}.flashcard__face{padding:40px var(--space-6) 40px;min-height:240px}.flashcard__back{min-height:240px}.flashcard__text{font-size:clamp(.95rem,2vw,1.1rem)}.flashcard__text--answer{font-size:clamp(.85rem,1.8vw,1rem)}.flashcard__tag{top:var(--space-3);left:var(--space-4)}.flashcard__grade-btns{gap:var(--space-2)}.flashcard__grade-btn{font-size:.85rem;padding:var(--space-2) var(--space-3)}}@media (max-width: 640px){.flashcard-wrapper{gap:var(--space-6)}.flashcard{max-width:100%}.flashcard__face{padding:30px var(--space-4) 30px;min-height:200px}.flashcard__back{min-height:200px}.flashcard__text{font-size:clamp(.9rem,1.8vw,1rem);max-height:120px}.flashcard__text--answer{font-size:clamp(.8rem,1.5vw,.95rem)}.flashcard__label{font-size:.6rem}.flashcard__hint{padding:var(--space-2) var(--space-3);font-size:.75rem}.flashcard__grades{max-width:100%;padding:0 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var(--border);background:var(--bg-card);color:var(--text-secondary);font-size:.85rem;font-weight:600;cursor:pointer;transition:all .2s;font-family:var(--font-family)}.achievements-filter__btn:hover{background:var(--bg-card-hover);color:var(--text-primary);border-color:var(--border-accent)}.achievements-filter__btn--active{background:#7c3aed33;border-color:#7c3aed80;color:var(--accent-violet-light)}.achievements-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:var(--space-5)}.achievement-card{display:flex;align-items:flex-start;gap:var(--space-4);padding:var(--space-5);border-radius:var(--radius-lg);position:relative;transition:transform .2s,box-shadow .2s}.achievement-card--unlocked{transform:none}.achievement-card--unlocked:hover{transform:translateY(-3px);box-shadow:0 8px 30px 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var(--accent-violet-glow);background:var(--bg-card-hover)}.form-input:disabled{opacity:.6;cursor:not-allowed}.form-input::placeholder{color:var(--text-muted)}.password-input-wrapper{position:relative;display:flex;align-items:center}.password-input-wrapper .form-input{padding-right:44px}.password-toggle{position:absolute;right:12px;background:none;border:none;color:var(--text-muted);cursor:pointer;padding:4px;display:flex;align-items:center;transition:color .15s}.password-toggle:hover:not(:disabled){color:var(--text-primary)}.password-toggle:disabled{opacity:.5;cursor:not-allowed}.auth-error{padding:10px 14px;background:var(--badge-rose-bg);border:1px solid rgba(244,63,94,.3);border-radius:10px;color:var(--badge-rose-text);font-size:.875rem;animation:shake .3s ease-in-out}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-5px)}75%{transform:translate(5px)}}.auth-button{padding:13px 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p{color:var(--text-secondary);font-size:.9rem;margin-bottom:var(--space-3)}.pyq__disclaimer{font-size:.72rem;color:var(--text-muted);line-height:1.5;text-align:center}@media (max-width: 768px){.pyq__card{padding:var(--space-5);gap:var(--space-4)}.pyq__icon{font-size:2.5rem}.pyq__card h2{font-size:1.15rem}.pyq__pills .btn{flex:1 1 auto;justify-content:center}}.leaderboard{max-width:720px;margin:0 auto}.leaderboard__list{display:flex;flex-direction:column;gap:var(--space-2)}.leaderboard__row{display:flex;align-items:center;gap:var(--space-4);padding:var(--space-3) var(--space-4);min-height:56px}.leaderboard__row--me{border-color:var(--accent-violet);background:var(--badge-violet-bg)}.leaderboard__rank{font-size:1rem;font-weight:800;color:var(--text-secondary);width:44px;flex-shrink:0;text-align:center}.leaderboard__name{flex:1;min-width:0;display:flex;align-items:center;gap:var(--space-2);font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.leaderboard__you{flex-shrink:0;font-size:.65rem}.leaderboard__xp{font-weight:700;color:var(--text-accent);flex-shrink:0}.leaderboard__divider{text-align:center;color:var(--text-muted);padding:var(--space-3) 0;letter-spacing:.2em}.leaderboard__error{padding:var(--space-6);text-align:center;display:flex;flex-direction:column;align-items:center;gap:var(--space-3);color:var(--badge-rose-text)}.leaderboard__note{text-align:center;font-size:.75rem;color:var(--text-muted);margin-top:var(--space-5)}@media (max-width: 640px){.leaderboard__row{gap:var(--space-3);padding:var(--space-2) var(--space-3);min-height:48px;font-size:.875rem}.leaderboard__rank{width:34px;font-size:.9rem}.leaderboard__xp{font-size:.8rem}}.content-page{position:relative;min-height:100vh;background:var(--bg-base);color:var(--text-primary)}.content-nav{display:flex;align-items:center;justify-content:space-between;padding:20px clamp(20px,5vw,64px);border-bottom:1px solid var(--border)}.content-nav__brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:1.1rem;color:var(--text-primary);text-decoration:none}.content-wrap{max-width:760px;margin:0 auto;padding:clamp(32px,6vw,64px) 24px 80px}.content-eyebrow{font-size:.75rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--text-accent);margin-bottom:12px}.content-wrap h1{font-size:clamp(1.7rem,4vw,2.4rem);font-weight:800;line-height:1.2;margin-bottom:16px}.content-lede{font-size:1.05rem;color:var(--text-secondary);line-height:1.7;margin-bottom:40px}.content-wrap h2{font-size:1.25rem;font-weight:700;margin:40px 0 12px;line-height:1.35}.content-wrap h3{font-size:1rem;font-weight:700;margin:28px 0 8px}.content-wrap p{line-height:1.75;margin-bottom:16px;color:var(--text-primary)}.content-wrap ul,.content-wrap ol{margin:0 0 20px 20px;line-height:1.75}.content-wrap li{margin-bottom:8px}.content-wrap a{color:var(--accent-cyan);text-decoration:underline}.faq-item{padding:22px 0;border-bottom:1px solid var(--border)}.faq-item:last-child{border-bottom:none}.faq-item h2{font-size:1.05rem;margin:0 0 10px}.faq-item p:last-child{margin-bottom:0}.content-cta{margin-top:56px;padding:28px;border:1px solid var(--border-accent);border-radius:var(--radius-lg);background:var(--gradient-card);text-align:center}.content-cta h2{margin:0 0 8px;font-size:1.15rem}.content-cta p{color:var(--text-secondary);font-size:.9rem;margin-bottom:18px}.content-footer{border-top:1px solid var(--border);padding:24px clamp(20px,5vw,64px) 40px;color:var(--text-muted);font-size:.8rem;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between}.content-footer a{color:var(--text-muted)}.content-footer a:hover{color:var(--text-secondary)}@media (max-width: 640px){.content-wrap{padding-left:18px;padding-right:18px}.content-nav{padding:16px 18px}}:root{--bg-base: #05080f;--bg-surface: #0d1120;--bg-card: rgba(255, 255, 255, .04);--bg-card-hover: rgba(255, 255, 255, .07);--bg-input: rgba(255, 255, 255, .06);--accent-violet: #7c3aed;--accent-violet-light: #a855f7;--accent-violet-glow: rgba(124, 58, 237, .35);--accent-cyan: #06b6d4;--accent-cyan-light: #22d3ee;--accent-cyan-glow: rgba(6, 182, 212, .3);--accent-green: #10b981;--accent-amber: #f59e0b;--accent-rose: #f43f5e;--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-muted: #475569;--text-accent: #a78bfa;--border: rgba(255, 255, 255, .09);--border-accent: rgba(124, 58, 237, .4);--bg-chrome: rgba(10, 15, 30, .95);--bg-chrome-soft: rgba(10, 15, 30, .8);--bg-modal: #0f1729;--bg-tooltip: #1e293b;--text-on-tooltip: #f1f5f9;--overlay: rgba(0, 0, 0, .7);--scrollbar-thumb: rgba(124, 58, 237, .4);--badge-violet-bg: rgba(124, 58, 237, .2);--badge-cyan-bg: rgba(6, 182, 212, .15);--badge-green-bg: rgba(16, 185, 129, .15);--badge-amber-bg: rgba(245, 158, 11, .15);--badge-rose-bg: rgba(244, 63, 94, .15);--badge-green-text: #34d399;--badge-amber-text: #fbbf24;--badge-rose-text: #fb7185;--gradient-primary: linear-gradient(135deg, #7c3aed 0%, #06b6d4 100%);--gradient-card: linear-gradient(135deg, rgba(124, 58, 237, .15) 0%, rgba(6, 182, 212, .08) 100%);--gradient-hero: linear-gradient(135deg, #1e1040 0%, #0a1628 50%, #071018 100%);--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--space-8: 32px;--space-10: 40px;--space-12: 48px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 20px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 40px rgba(0, 0, 0, .5);--shadow-glow-violet: 0 0 30px rgba(124, 58, 237, .4);--shadow-glow-cyan: 0 0 30px rgba(6, 182, 212, .3);--transition-fast: .15s ease;--transition-base: .25s ease;--transition-slow: .4s ease;--sidebar-width: 260px;--font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif}:root[data-theme=light]{--bg-base: #f4f6fb;--bg-surface: #ffffff;--bg-card: rgba(255, 255, 255, .75);--bg-card-hover: rgba(255, 255, 255, .95);--bg-input: rgba(15, 23, 42, .04);--accent-violet-glow: rgba(124, 58, 237, .18);--accent-cyan-glow: rgba(6, 182, 212, .15);--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #94a3b8;--text-accent: #7c3aed;--border: rgba(15, 23, 42, .09);--border-accent: rgba(124, 58, 237, .35);--bg-chrome: rgba(255, 255, 255, .92);--bg-chrome-soft: rgba(255, 255, 255, .8);--bg-modal: #ffffff;--bg-tooltip: #0f172a;--text-on-tooltip: #f8fafc;--overlay: rgba(15, 23, 42, .45);--scrollbar-thumb: rgba(124, 58, 237, .3);--badge-violet-bg: rgba(124, 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var(--space-2);font-size:.65rem}.sidebar__item-label{font-size:.75rem}.modal{border-radius:var(--radius-md);max-height:90vh}.due-deck-item{padding:var(--space-2) var(--space-3)}.analytics-section{padding:var(--space-4)}.empty-state{padding:var(--space-6)}.empty-state-icon{width:60px;height:60px}.pomodoro{padding:var(--space-4)}.input-label{font-size:.7rem}}@media (max-width: 480px){:root{--space-8: 8px;--space-6: 6px}.page-container{padding:var(--space-3)}.btn{padding:var(--space-1) var(--space-2);font-size:.75rem}.stat-card__value{font-size:1.1rem}.hero-brain{font-size:2.5rem}h1{font-size:1.1rem}h2{font-size:1rem}h3{font-size:.9rem}.dashboard__grid{grid-template-columns:1fr}.topbar__title{font-size:.9rem}}