@import "https://api.fontshare.com/v2/css?f[]=clash-display@500,600,700&f[]=general-sans@400,500,600,700&display=swap";@import "https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@1&display=swap";*{box-sizing:border-box;margin:0;padding:0}:root{--bg:#f2efe9;--bg2:#fbf9f4;--border:#1c191424;--border-hover:#1c191466;--text:#1c1914;--muted:#625b50;--accent:#b24824;--accent2:#b24824;--accent-bright:#e45e33;--accent3:#46647a;--green:#2f6338;--danger:#a82f22;--yellow:#8c6d1f;--btn-bg:#1c1914;--btn-fg:#f7f4ee;--accent-fill:#b24824;--accent-fill-fg:#fff;--grad-main:var(--accent-fill);--grad-warm:#8c6d1f;--grad-cool:#46647a;--grad-green:#4a7a57;--shadow-sm:0 1px 2px #1c19140a;--shadow:0 2px 10px #1c19140f;--shadow-lg:0 6px 24px #1c191414;--shadow-accent:0 2px 10px #1c191414;--font-display:"Clash Display", "General Sans", sans-serif;--font-body:"General Sans", system-ui, sans-serif;--font-serif:"Instrument Serif", Georgia, serif}html{scroll-behavior:smooth}[data-theme=dark]{--bg:#211b14;--bg2:#2a231b;--border:#f0eade24;--border-hover:#f0eade66;--text:#f0eae0;--muted:#a89c8a;--accent:#f0764a;--accent2:#f0764a;--accent-bright:#e8633a;--accent3:#9db8c9;--green:#86bf90;--danger:#e08573;--yellow:#d9a441;--btn-bg:#f0eae0;--btn-fg:#211b14;--accent-fill:#f0764a;--accent-fill-fg:#211b14;--shadow-sm:0 1px 2px #0003;--shadow:0 2px 10px #00000040;--shadow-lg:0 6px 24px #0000004d;--shadow-accent:0 2px 10px #00000040}[data-theme=dark] input,[data-theme=dark] textarea{color:var(--text);border-color:var(--border);background:#2a231b}[data-theme=dark] .topbar{border-color:var(--border);background:#211b14eb}[data-theme=dark] .auth-right{background:var(--bg)}[data-theme=dark] .landing-card-mock{color:var(--text)}[data-theme=dark] .btn-danger{background:#c03a2b1a;border-color:#c03a2b33}[data-theme=dark] .stat-card,[data-theme=dark] .deck-card,[data-theme=dark] .generate-form,[data-theme=dark] .sidebar-card,[data-theme=dark] .settings-card,[data-theme=dark] .flashcard-front,[data-theme=dark] .profile-dropdown,[data-theme=dark] .topbar-icon-btn,[data-theme=dark] .profile-btn{border-color:var(--border);background:#2a231b}[data-theme=dark] .count-btn,[data-theme=dark] .difficulty-btn{border-color:var(--border);color:var(--muted);background:#211b14}[data-theme=dark] .empty-state{background:#2a231b;border-color:#d9480f26}[data-theme=dark] .profile-divider,[data-theme=dark] .settings-row{border-color:var(--border)}[data-theme=dark] .profile-logout:hover,[data-theme=dark] .toggle-btn{background:#211b14}[data-theme=dark] .toggle-btn.active{background:var(--accent-fill);color:var(--accent-fill-fg)}[data-theme=dark] .topbar-icon-btn:hover,[data-theme=dark] .profile-btn:hover{border-color:var(--accent)}body{font-family:var(--font-body);background:var(--bg);color:var(--text);min-height:100vh}h1,h2,h3{font-family:var(--font-display);letter-spacing:-.02em;word-spacing:.06em}@keyframes fadeUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes spin{to{transform:rotate(360deg)}}input,textarea{border:1px solid var(--border);background:var(--bg2);width:100%;color:var(--text);border-radius:8px;outline:none;padding:14px 18px;font-family:inherit;font-size:1rem;transition:border-color .2s,box-shadow .2s}input::placeholder,textarea::placeholder{color:#a59d90}input:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px #d9480f1f}.btn-primary{background:var(--btn-bg);color:var(--btn-fg);border:1px solid var(--btn-bg);cursor:pointer;white-space:nowrap;border-radius:99px;justify-content:center;align-items:center;gap:8px;padding:12px 26px;font-family:inherit;font-size:.92rem;font-weight:600;text-decoration:none;transition:background .2s,color .2s,border-color .2s;display:inline-flex}.btn-primary:hover{background:var(--accent-fill);border-color:var(--accent-fill);color:var(--accent-fill-fg)}.btn-primary:disabled{opacity:.55;cursor:not-allowed}.btn-ghost{color:var(--text);border:1px solid var(--border-hover);cursor:pointer;background:0 0;border-radius:99px;align-items:center;gap:6px;padding:11px 20px;font-family:inherit;font-size:.9rem;font-weight:600;text-decoration:none;transition:background .2s,color .2s,border-color .2s;display:inline-flex}.btn-ghost:hover{background:var(--btn-bg);border-color:var(--btn-bg);color:var(--btn-fg)}.btn-danger{color:var(--danger);cursor:pointer;background:#c03a2b0f;border:1px solid #c03a2b2e;border-radius:8px;align-items:center;padding:11px 18px;font-family:inherit;font-size:.9rem;font-weight:600;transition:all .18s;display:inline-flex}.btn-danger:hover{background:#c03a2b1f;border-color:#c03a2b5c}.page{flex-direction:column;min-height:100vh;display:flex}.topbar{border-bottom:1px solid var(--border);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);z-index:100;background:#f2efe9e6;justify-content:space-between;align-items:center;padding:18px 48px;display:flex;position:sticky;top:0}.topbar-logo{align-items:center;gap:10px;text-decoration:none;display:flex}.topbar-logo-icon{border-radius:8px;width:40px;height:40px;display:block}.topbar-logo-name{font-family:var(--font-display);color:var(--text);letter-spacing:-.02em;font-size:1.15rem;font-weight:600}.topbar-actions{align-items:center;gap:10px;display:flex}.topbar-icon-btn{border:1px solid var(--border);background:var(--bg2);width:40px;height:40px;color:var(--muted);cursor:pointer;border-radius:7px;flex-shrink:0;justify-content:center;align-items:center;text-decoration:none;transition:all .18s;display:flex}.topbar-icon-btn:hover{color:var(--accent);border-color:var(--accent);background:#d9480f0d}.profile-wrap{position:relative}.profile-btn{border:1px solid var(--border);background:var(--bg2);cursor:pointer;border-radius:7px;justify-content:center;align-items:center;width:40px;height:40px;padding:0;transition:all .18s;display:flex}.profile-btn:hover{border-color:var(--accent);box-shadow:0 0 0 3px #d9480f1a}.profile-avatar{background:var(--grad-main);color:#fff;border-radius:6px;justify-content:center;align-items:center;width:28px;height:28px;font-size:.82rem;font-weight:700;display:flex}.profile-dropdown{background:var(--bg2);border:1px solid var(--border);z-index:200;border-radius:10px;width:240px;animation:.2s cubic-bezier(.16,1,.3,1) both fadeUp;position:absolute;top:calc(100% + 10px);right:0;overflow:hidden;box-shadow:0 16px 48px #d9480f29}.profile-info{align-items:center;gap:12px;padding:18px 18px 16px;display:flex}.profile-avatar-lg{background:var(--grad-main);color:#fff;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;font-size:1rem;font-weight:700;display:flex}.profile-email{color:var(--text);word-break:break-all;font-size:.82rem;font-weight:600}.profile-label{color:var(--muted);margin-top:2px;font-size:.72rem}.profile-divider{background:var(--border);height:1px;margin:0}.profile-meta{flex-direction:column;gap:8px;padding:12px 18px;display:flex}.profile-meta-row{justify-content:space-between;align-items:center;font-size:.82rem;display:flex}.profile-meta-row span{color:var(--muted)}.profile-meta-row strong{color:var(--text);font-weight:700}.profile-logout{width:100%;color:var(--danger);cursor:pointer;text-align:left;background:0 0;border:none;align-items:center;gap:9px;padding:14px 18px;font-family:inherit;font-size:.88rem;font-weight:600;transition:background .15s;display:flex}.profile-logout:hover{background:#c03a2b0d}.content{flex:1;width:100%;max-width:1280px;margin:0 auto;padding:44px 48px 72px}@keyframes errorShake{0%,to{transform:translate(0)}20%,60%{transform:translate(-5px)}40%,80%{transform:translate(5px)}}.error{color:var(--danger);background:#c03a2b0f;border:1px solid #c03a2b2e;border-radius:8px;padding:12px 16px;font-size:.88rem;animation:.4s errorShake}.auth-container{grid-template-columns:1fr 1fr;min-height:100vh;animation:.4s both fadeIn;display:grid}.auth-left{background:var(--bg);border-right:1px solid var(--border);flex-direction:column;justify-content:center;align-items:center;gap:32px;padding:60px;display:flex;position:relative;overflow:hidden}.auth-left-content{z-index:1;color:var(--text);text-align:center;position:relative}.auth-left-icon{width:84px;height:84px;color:var(--accent);background:#d9480f14;border-radius:12px;justify-content:center;align-items:center;margin:0 auto 20px;display:flex}.auth-left-content h2{letter-spacing:-.02em;margin-bottom:12px;font-size:2rem;font-weight:700}.auth-left-content p{opacity:.85;max-width:320px;font-size:1.05rem;line-height:1.6}.auth-features{z-index:1;flex-direction:column;gap:12px;display:flex;position:relative}.auth-feature{background:var(--bg2);border:1px solid var(--border);color:var(--text);border-radius:8px;align-items:center;gap:12px;padding:12px 16px;font-size:.92rem;font-weight:500;display:flex}.auth-feature-icon{color:var(--accent);align-items:center;display:flex}.auth-right{background:var(--bg2);justify-content:center;align-items:center;padding:60px 40px;display:flex}.auth-card{width:100%;max-width:380px;animation:.5s cubic-bezier(.16,1,.3,1) .1s both fadeUp}.auth-logo{justify-content:center;align-items:center;gap:10px;margin-bottom:32px;display:flex}.auth-logo-icon{border-radius:8px;width:40px;height:40px;display:block}.auth-logo-name{font-family:var(--font-display);letter-spacing:-.02em;color:var(--text);font-size:1.3rem;font-weight:600}.auth-title{letter-spacing:-.03em;text-align:center;margin-bottom:6px;font-size:1.5rem;font-weight:700}.auth-subtitle{color:var(--muted);text-align:center;margin-bottom:28px;font-size:.92rem}.auth-form{flex-direction:column;gap:14px;display:flex}.auth-form .btn-primary{width:100%;margin-top:4px;padding:14px;font-size:1rem}.auth-link{text-align:center;color:var(--muted);margin-top:20px;font-size:.88rem}.auth-link a{color:var(--accent);font-weight:700;text-decoration:none}.auth-link a:hover{color:var(--accent2)}.dash-hero{background:var(--bg2);border:1px solid var(--border);border-radius:14px;justify-content:space-between;align-items:center;gap:32px;margin-bottom:36px;padding:48px 56px;display:flex;position:relative}.dash-hero-text{z-index:1;position:relative}.dash-hero-text h1{letter-spacing:-.03em;color:var(--text);margin-bottom:10px;font-size:2.4rem;font-weight:600;line-height:1.1}.dash-hero-text p{color:var(--muted);font-size:1.05rem}.dash-hero-actions{z-index:1;flex-shrink:0;gap:10px;display:flex;position:relative}.btn-white{background:var(--btn-bg);color:var(--btn-fg);border:1px solid var(--btn-bg);cursor:pointer;border-radius:99px;align-items:center;gap:6px;padding:12px 22px;font-family:inherit;font-size:.9rem;font-weight:600;text-decoration:none;transition:background .2s,color .2s,border-color .2s;display:inline-flex}.btn-white:hover{background:var(--accent-fill);border-color:var(--accent-fill);color:var(--accent-fill-fg)}.btn-white-outline{color:var(--text);border:1px solid var(--border-hover);cursor:pointer;background:0 0;border-radius:99px;align-items:center;gap:6px;padding:12px 22px;font-family:inherit;font-size:.9rem;font-weight:600;text-decoration:none;transition:background .2s,color .2s,border-color .2s;display:inline-flex}.btn-white-outline:hover{background:var(--btn-bg);border-color:var(--btn-bg);color:var(--btn-fg)}.dash-stats{grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:40px;display:grid}.stat-card{background:var(--bg2);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:12px;align-items:center;gap:20px;padding:28px 30px;transition:transform .18s,box-shadow .18s;display:flex}.stat-card:hover{border-color:var(--border-hover);transform:translateY(-2px)}.stat-icon{border-radius:9px;flex-shrink:0;justify-content:center;align-items:center;width:58px;height:58px;font-size:1.7rem;display:flex}.stat-icon.purple,.stat-icon.pink,.stat-icon.cyan{color:var(--accent);border:1px solid var(--border);background:#d9480f14}.stat-info strong{letter-spacing:-.02em;color:var(--text);margin-bottom:5px;font-size:1.9rem;font-weight:700;line-height:1;display:block}.stat-info span{color:var(--muted);font-size:.88rem;font-weight:500}.section-title{color:var(--text);letter-spacing:-.02em;justify-content:space-between;align-items:center;margin-bottom:20px;font-size:1.15rem;font-weight:700;display:flex}.empty-state{text-align:center;background:var(--bg2);border:1.5px dashed #d9480f33;border-radius:10px;flex-direction:column;align-items:center;gap:14px;padding:60px 0;display:flex}.empty-icon{font-size:3.5rem}.empty-state h3{font-size:1.15rem;font-weight:700}.empty-state p{color:var(--muted);font-size:.92rem}.deck-grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;display:grid}.deck-card{background:var(--bg2);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:12px;padding:30px 28px;transition:transform .2s cubic-bezier(.16,1,.3,1),box-shadow .2s,border-color .2s;position:relative;overflow:hidden}.deck-card-stripe{border-radius:12px 12px 0 0;height:5px;display:none;position:absolute;top:0;left:0;right:0}.deck-card:nth-child(4n+1) .deck-card-stripe{background:var(--accent-bright);display:none}.deck-card:nth-child(4n+2) .deck-card-stripe{background:var(--grad-warm);display:none}.deck-card:nth-child(4n+3) .deck-card-stripe{background:var(--grad-cool);display:none}.deck-card:nth-child(4n+4) .deck-card-stripe{background:var(--grad-green);display:none}.deck-card:hover{border-color:var(--border-hover);transform:translateY(-2px)}.deck-card-icon{margin-bottom:16px;font-size:2.5rem;display:block}.deck-card h3{letter-spacing:-.02em;margin-bottom:6px;font-size:1.05rem;font-weight:700}.deck-card-date{color:var(--muted);margin-bottom:22px;font-size:.8rem}.deck-actions{gap:10px;display:flex}.generate-layout{grid-template-columns:1fr 360px;align-items:start;gap:28px;display:grid}.generate-form{background:var(--bg2);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:12px;flex-direction:column;gap:22px;padding:36px;display:flex}.generate-form textarea{resize:vertical;min-height:260px;line-height:1.7}.form-label{color:var(--muted);letter-spacing:.06em;text-transform:uppercase;flex-direction:column;gap:8px;font-size:.8rem;font-weight:700;display:flex}.generate-sidebar{flex-direction:column;gap:16px;display:flex;position:sticky;top:90px}.sidebar-card{background:var(--bg2);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:10px;padding:22px}.sidebar-card h3{color:var(--muted);letter-spacing:.06em;text-transform:uppercase;margin-bottom:14px;font-size:.85rem;font-weight:700}.count-selector{grid-template-columns:repeat(5,1fr);gap:8px;display:grid}.count-btn{border:1px solid var(--border);background:var(--bg);height:44px;color:var(--muted);cursor:pointer;border-radius:7px;font-family:inherit;font-size:.9rem;font-weight:700;transition:all .18s}.count-btn:hover{border-color:var(--accent);color:var(--accent);background:#d9480f0d}.count-btn.active{background:var(--accent-fill);border-color:var(--accent-fill);color:var(--accent-fill-fg)}.difficulty-selector{flex-direction:column;gap:8px;display:flex}.difficulty-btn{border:1px solid var(--border);background:var(--bg);cursor:pointer;text-align:left;border-radius:8px;align-items:center;gap:12px;padding:12px 14px;font-family:inherit;transition:all .18s;display:flex}.difficulty-btn:hover{border-color:var(--accent);background:#d9480f0a}.difficulty-btn.active{border-color:var(--accent);background:#d9480f12;box-shadow:0 0 0 3px #d9480f1a}.difficulty-btn span:first-child{flex-shrink:0;font-size:1.3rem}.difficulty-text{flex-direction:column;display:flex}.difficulty-label{color:var(--text);font-size:.88rem;font-weight:700}.difficulty-desc{color:var(--muted);margin-top:1px;font-size:.75rem}.generate-submit{width:100%;padding:15px 32px;font-size:1rem}.loading-text{align-items:center;gap:10px;display:flex}.spinner{border:2px solid #ffffff4d;border-top-color:#fff;border-radius:50%;width:16px;height:16px;animation:.7s linear infinite spin}.generate-tip{color:var(--accent);background:#d9480f0f;border:1px solid #d9480f26;border-radius:8px;padding:14px 16px;font-size:.85rem;line-height:1.55}.generate-tip strong{margin-bottom:4px;font-weight:700;display:block}.notes-label-row{justify-content:space-between;align-items:center;display:flex}.upload-btn{border:1px solid var(--border);background:var(--bg);color:var(--accent);text-transform:none;letter-spacing:0;cursor:pointer;border-radius:7px;align-items:center;gap:7px;padding:7px 13px;font-family:inherit;font-size:.78rem;font-weight:700;transition:all .16s;display:inline-flex}.upload-btn:hover{border-color:var(--accent);background:#d9480f0f}.upload-btn:disabled{opacity:.6;cursor:default}.spinner-dark{border:2px solid #d9480f40;border-top-color:var(--accent)}.notes-meta{justify-content:space-between;align-items:center;margin-top:-2px;display:flex}.upload-hint{color:var(--muted);text-transform:none;letter-spacing:0;font-size:.72rem;font-weight:500}.char-count{color:var(--muted);text-transform:none;letter-spacing:0;font-size:.74rem;font-weight:600}.char-count.over{color:var(--danger)}[data-theme=dark] .upload-btn{background:#211b14}.study-content{flex-direction:column;align-items:center;display:flex}.study-hero{background:var(--bg2);border:1px solid var(--border);border-radius:12px;justify-content:space-between;align-items:center;gap:20px;width:100%;margin-bottom:32px;padding:28px 32px;display:flex;position:relative}.study-hero-text{z-index:1;position:relative}.study-hero-text h1{color:var(--text);letter-spacing:-.02em;margin-bottom:4px;font-size:1.5rem;font-weight:600}.study-hero-text p{color:var(--muted);font-size:.88rem}.progress-wrap{width:100%;max-width:640px}.progress-bar-track{border:1px solid var(--border);background:#d9480f1a;border-radius:99px;height:8px;margin-bottom:8px;overflow:hidden}.progress-bar-fill{background:var(--accent-bright);border-radius:99px;height:100%;transition:width .4s cubic-bezier(.16,1,.3,1)}.progress-meta{color:var(--muted);justify-content:space-between;font-size:.82rem;font-weight:600;display:flex}.flashcard{perspective:1400px;cursor:pointer;width:100%;max-width:700px;height:380px;margin:28px 0 12px}.flashcard-inner{width:100%;height:100%;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.16,1,.3,1);position:relative}.flashcard.flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-front,.flashcard-back{backface-visibility:hidden;text-align:center;border-radius:12px;flex-direction:column;justify-content:center;align-items:center;gap:16px;padding:44px;display:flex;position:absolute;inset:0}.flashcard-front{background:var(--bg2);border:1px solid var(--border);box-shadow:var(--shadow-lg)}.flashcard-back{background:var(--btn-bg);border:1px solid var(--btn-bg);box-shadow:var(--shadow-lg);color:var(--btn-fg);transform:rotateY(180deg)}.card-label{letter-spacing:.12em;text-transform:uppercase;color:var(--muted);background:#d9480f14;border-radius:99px;padding:5px 12px;font-size:.7rem;font-weight:700}.flashcard-back .card-label{color:var(--btn-fg);background:#d9480f40}.flashcard-front p{color:var(--text);font-size:1.3rem;font-weight:500;line-height:1.65}.flashcard-back p{color:var(--btn-fg);font-size:1.3rem;font-weight:500;line-height:1.65}.flip-hint{color:var(--muted);align-items:center;gap:6px;margin-bottom:24px;font-size:.82rem;display:flex}.study-nav{align-items:center;gap:12px;display:flex}.study-complete{text-align:center;flex-direction:column;align-items:center;gap:16px;padding:60px 0;animation:.5s cubic-bezier(.16,1,.3,1) both fadeUp;display:flex}.complete-icon{font-size:4.5rem}.complete-badge{color:var(--accent);letter-spacing:.04em;background:#d9480f1a;border:1px solid #d9480f33;border-radius:99px;padding:6px 18px;font-size:.82rem;font-weight:700}.study-complete h2{letter-spacing:-.02em;font-size:1.8rem;font-weight:700}.study-complete p{color:var(--muted);font-size:.95rem}.settings-stack{flex-direction:column;gap:20px;max-width:620px;display:flex}.settings-card{background:var(--bg2);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:10px;overflow:hidden}.settings-danger-card{border-color:#c03a2b2e}.settings-section-title{letter-spacing:.08em;text-transform:uppercase;color:var(--muted);padding:18px 24px 12px;font-size:.78rem;font-weight:700}.danger-title{color:var(--danger)}.settings-row{border-top:1px solid var(--border);justify-content:space-between;align-items:center;gap:16px;padding:16px 24px;display:flex}.settings-row-label{flex:1}.settings-row-label span{color:var(--muted);margin-bottom:3px;font-size:.88rem;display:block}.settings-row-label p{color:var(--text);font-size:.92rem;font-weight:600}.settings-form{border-top:1px solid var(--border);flex-direction:column;gap:12px;padding:16px 24px 20px;display:flex}.settings-btn{align-self:flex-start}.settings-success{color:var(--green);font-size:.88rem;font-weight:600}.toggle-group{flex-shrink:0;gap:6px;display:flex}.toggle-btn{border:1px solid var(--border);background:var(--bg);color:var(--muted);cursor:pointer;white-space:nowrap;border-radius:7px;padding:8px 14px;font-family:inherit;font-size:.82rem;font-weight:600;transition:all .15s}.toggle-btn:hover{border-color:var(--accent);color:var(--accent)}.toggle-btn.active{background:var(--accent-fill);border-color:var(--accent-fill);color:var(--accent-fill-fg)}.delete-confirm{background:#c03a2b05;border-top:1px solid #c03a2b1f;padding:16px 24px 20px}.delete-confirm 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.paper:first-child{transform:translate(calc(-120% + var(--magnet-x,0px)), calc(-70% + var(--magnet-y,0px))) rotateZ(-15deg)}.folder.open .paper:nth-child(2){transform:translate(calc(10% + var(--magnet-x,0px)), calc(-70% + var(--magnet-y,0px))) rotateZ(15deg);height:80%}.folder.open .paper:nth-child(3){transform:translate(calc(-50% + var(--magnet-x,0px)), calc(-100% + var(--magnet-y,0px))) rotateZ(5deg);height:80%}.folder.open .folder__front{transform:skew(15deg)scaleY(.6)}.folder.open .right{transform:skew(-15deg)scaleY(.6)}.folder__back{background:var(--folder-back-color);border-radius:0 7px 7px;width:100px;height:80px;position:relative}.folder__back:after{z-index:0;content:"";background:var(--folder-back-color);border-radius:4px 4px 0 0;width:30px;height:10px;position:absolute;bottom:98%;left:0}.paper{z-index:2;background:var(--paper-1);border-radius:7px;width:70%;height:80%;transition:all .3s ease-in-out;position:absolute;bottom:10%;left:50%;transform:translate(-50%,10%);box-shadow:0 1px 4px #00000014}.paper:nth-child(2){background:var(--paper-2);width:80%;height:70%}.paper:nth-child(3){background:var(--paper-3);width:90%;height:60%}.folder__front{z-index:3;background:var(--folder-color);transform-origin:bottom;border-radius:4px 7px 7px;width:100%;height:100%;transition:all .3s ease-in-out;position:absolute}.folder-name{color:var(--text);letter-spacing:-.01em;text-overflow:ellipsis;white-space:nowrap;max-width:100%;font-size:.85rem;font-weight:700;overflow:hidden}.folder-count{color:var(--muted);font-size:.72rem;font-weight:600}.folder-actions{opacity:0;gap:4px;transition:opacity .18s;display:flex;position:absolute;top:8px;right:8px}.folder-card:hover .folder-actions{opacity:1}.folder-mini-btn{border:1px solid var(--border);background:var(--bg2);width:26px;height:26px;color:var(--muted);cursor:pointer;border-radius:6px;justify-content:center;align-items:center;padding:0;transition:all .15s;display:flex}.folder-mini-btn:hover{color:var(--accent);border-color:var(--accent)}.folder-mini-btn.danger:hover{color:var(--danger);border-color:var(--danger)}.folder-new{color:var(--accent);border-style:dashed;border-color:#d9480f4d;justify-content:center;gap:10px;min-height:138px}.folder-new:hover{background:#d9480f0a}.folder-new-icon{background:#d9480f1a;border-radius:8px;justify-content:center;align-items:center;width:44px;height:44px;transition:transform .2s cubic-bezier(.16,1,.3,1);display:flex}.folder-new:hover .folder-new-icon{transform:scale(1.1)}.folder-new .folder-name{color:var(--accent)}.folder-new-form{cursor:default;width:210px;min-height:138px;box-shadow:0 0 0 3px #d9480f14, var(--shadow);border-color:#d9480f59;justify-content:center;align-items:stretch;gap:10px;padding:16px}.folder-new-form:hover{transform:none}.folder-form-head{align-items:center;gap:8px;display:flex}.folder-form-icon{width:26px;height:26px;color:var(--accent);background:#d9480f1a;border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;display:flex}.folder-form-title{color:var(--text);letter-spacing:-.01em;text-align:left;flex:1;font-size:.85rem;font-weight:700}.folder-new-form input{border-radius:7px;padding:10px 12px;font-size:.85rem}.folder-create-btn{border-radius:7px;justify-content:center;width:100%;padding:9px 12px;font-size:.8rem}.folder-rename{align-items:center;gap:6px;width:100%;min-height:90px;display:flex}.folder-rename input{border-radius:7px;min-width:0;padding:8px 10px;font-size:.82rem}.deck-card-iconchip{background:color-mix(in srgb, var(--chip-color) 12%, transparent);width:44px;height:44px;color:var(--chip-color);border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;display:flex}.deck-card-top-right{align-items:center;gap:8px;display:flex}.deck-move-wrap{position:relative}.deck-move-btn{border:1px solid var(--border);background:var(--bg2);width:30px;height:30px;color:var(--muted);cursor:pointer;border-radius:7px;justify-content:center;align-items:center;padding:0;transition:all .15s;display:flex}.deck-move-btn:hover{color:var(--accent);border-color:var(--accent)}.move-menu{background:var(--bg2);border:1px solid var(--border);min-width:170px;box-shadow:var(--shadow-lg);z-index:50;border-radius:8px;flex-direction:column;gap:2px;max-height:240px;padding:6px;display:flex;position:absolute;top:calc(100% + 6px);right:0;overflow:auto}.move-item{width:100%;color:var(--text);text-align:left;cursor:pointer;background:0 0;border:none;border-radius:7px;align-items:center;gap:8px;padding:9px 11px;font-family:inherit;font-size:.83rem;font-weight:600;transition:background .13s;display:flex}.move-item:hover{background:#d9480f12}.move-item.active{color:var(--accent);background:#d9480f14}.stat-locked{border-style:dashed;text-decoration:none}.stat-locked:hover{border-color:var(--accent)}.tier-badge{letter-spacing:.02em;border-radius:99px;align-items:center;gap:5px;padding:4px 12px;font-size:.8rem;font-weight:700;display:inline-flex}.tier-badge.tier-free{color:var(--muted);background:#6e675c1f}.tier-badge.tier-plus{color:var(--accent3);background:#1c19141f}.tier-badge.tier-pro{color:var(--accent);background:#d9480f1f}.tier-badge.tier-ultra{color:var(--yellow);background:#8c6d1f24}.tier-text.tier-plus{color:var(--accent3)}.tier-text.tier-pro{color:var(--accent)}.tier-text.tier-ultra{color:var(--yellow)}.pricing-header{text-align:center}.pricing-notice{color:var(--yellow);text-align:center;background:#8c6d1f14;border:1px solid #8c6d1f40;border-radius:8px;margin-bottom:24px;padding:14px 18px;font-size:.9rem;font-weight:600}.upgrade-success-banner{color:var(--green);background:#3d7a461a;border:1px solid #3d7a464d;border-radius:8px;align-items:center;gap:10px;padding:15px 18px;font-size:.92rem;font-weight:700;display:flex}[data-theme=dark] .upgrade-success-banner{color:#86bf90}.settings-thanks{color:var(--muted)!important;font-size:.88rem!important;font-weight:500!important}.api-key-value{background:var(--bg);border:1px solid var(--border);word-break:break-all;border-radius:7px;margin-top:8px;padding:7px 10px;font-family:SF Mono,ui-monospace,monospace;font-size:.78rem!important}.pricing-grid{grid-template-columns:repeat(4,1fr);align-items:stretch;gap:20px;display:grid}.pricing-card{background:var(--bg2);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:12px;flex-direction:column;padding:30px 26px;transition:transform .22s cubic-bezier(.16,1,.3,1),box-shadow .22s,border-color .22s;display:flex;position:relative}.pricing-card:hover{border-color:var(--border-hover);transform:translateY(-2px)}.pricing-card.popular{border-color:var(--accent);box-shadow:var(--shadow-lg)}.pricing-card.current{border-color:var(--green)}.popular-badge{background:var(--accent-fill);color:var(--accent-fill-fg);letter-spacing:.05em;text-transform:uppercase;box-shadow:var(--shadow-accent);white-space:nowrap;border-radius:99px;padding:5px 16px;font-size:.72rem;font-weight:600;position:absolute;top:-13px;left:50%;transform:translate(-50%)}.pricing-icon{border-radius:8px;justify-content:center;align-items:center;width:44px;height:44px;margin-bottom:14px;display:flex}.tier-card-free .pricing-icon{color:var(--muted);background:#6e675c1f}.tier-card-plus .pricing-icon{color:var(--accent3);background:#1c19141f}.tier-card-pro .pricing-icon{color:var(--accent);background:#d9480f1f}.tier-card-ultra .pricing-icon{color:var(--yellow);background:#8c6d1f24}.pricing-tier-name{letter-spacing:-.02em;margin-bottom:6px;font-size:1.1rem;font-weight:700}.pricing-price{letter-spacing:-.02em;color:var(--text);flex-wrap:wrap;align-items:baseline;gap:8px;margin-bottom:20px;font-size:2rem;font-weight:700;display:flex}.pricing-price-stack{flex-direction:column;gap:2px;display:flex}.pricing-price-stack .pricing-price{margin-bottom:16px}.pricing-price-old{color:var(--muted);font-size:1.05rem;font-weight:700;-webkit-text-decoration:line-through #c03a2b8c;text-decoration:line-through #c03a2b8c;text-decoration-thickness:2px}.pricing-discount-badge{letter-spacing:.01em;color:var(--green);white-space:nowrap;background:#3d7a461a;border:1px solid #3d7a4640;border-radius:99px;padding:4px 10px;font-size:.7rem;font-weight:700}[data-theme=dark] .pricing-discount-badge{color:#86bf90}.pricing-features{flex-direction:column;flex:1;gap:11px;margin-bottom:26px;list-style:none;display:flex}.pricing-features li{color:var(--text);align-items:flex-start;gap:9px;font-size:.86rem;line-height:1.45;display:flex}.pricing-check{width:19px;height:19px;color:var(--green);background:#3d7a461f;border-radius:5px;flex-shrink:0;justify-content:center;align-items:center;margin-top:1px;display:flex}.pricing-btn{justify-content:center;width:100%}.pricing-current-badge{text-align:center;width:100%;color:var(--green);background:#3d7a461a;border:1px solid #3d7a464d;border-radius:8px;padding:11px;font-size:.88rem;font-weight:700}[data-theme=dark] .pricing-current-badge{color:#86bf90}.locked-state{text-align:center;background:var(--bg2);border:1.5px dashed #d9480f40;border-radius:12px;flex-direction:column;align-items:center;gap:14px;padding:70px 24px;display:flex}.locked-icon{width:68px;height:68px;color:var(--accent);background:#d9480f17;border-radius:10px;justify-content:center;align-items:center;margin-bottom:4px;display:flex}.locked-state h3{letter-spacing:-.02em;font-size:1.2rem;font-weight:700}.locked-state p{color:var(--muted);max-width:380px;font-size:.92rem;line-height:1.6}.stats-panels{grid-template-columns:1fr 1fr;gap:20px;margin-top:8px;display:grid}.stats-panel{background:var(--bg2);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:12px;padding:28px}.week-chart{justify-content:space-between;align-items:flex-end;gap:10px;height:180px;padding-top:20px;display:flex}.week-col{flex-direction:column;flex:1;justify-content:flex-end;align-items:center;gap:7px;height:100%;display:flex}.week-bar{background:var(--accent-bright);border-radius:6px 6px 4px 4px;width:100%;max-width:38px}.week-day{color:var(--muted);text-transform:capitalize;font-size:.72rem;font-weight:700}.week-value{color:var(--accent);min-height:16px;font-size:.75rem;font-weight:700}.stats-empty{color:var(--muted);font-size:.9rem;line-height:1.6}.mastery-list{flex-direction:column;gap:18px;display:flex}.mastery-head{justify-content:space-between;align-items:center;gap:12px;margin-bottom:10px;display:flex}.mastery-title{border:1px solid var(--border-hover);color:var(--text);white-space:nowrap;border-radius:99px;align-items:center;gap:6px;padding:6px 13px;font-size:.85rem;font-weight:600;text-decoration:none;transition:background .18s,color .18s,border-color .18s;display:inline-flex}.mastery-title:after{content:"→";transition:transform .2s var(--ease-out,cubic-bezier(.22, 1, .36, 1));font-size:.95em;transform:translate(0)}.mastery-title:hover{background:var(--btn-bg);border-color:var(--btn-bg);color:var(--btn-fg)}.mastery-title:hover:after{transform:translate(3px)}.mastery-pct{color:var(--accent);font-size:.85rem;font-weight:700}.mastery-track{background:#d9480f1a;border-radius:99px;gap:2px;height:8px;display:flex;overflow:hidden}.mastery-fill{background:var(--accent-bright);border-radius:99px;height:100%}.mastery-sub{color:var(--muted);margin-top:6px;font-size:.75rem;font-weight:600;display:block}.mastery-seg{border-radius:99px;height:100%}.seg-mature{background:var(--accent-bright,var(--accent))}.seg-young{background:color-mix(in srgb, var(--accent) 55%, transparent)}.seg-learning{background:color-mix(in srgb, var(--accent) 25%, transparent)}.mastery-due{color:var(--accent);margin-top:3px;font-style:normal;font-weight:500;display:block}.complete-icon-wrap{width:96px;height:96px;color:var(--accent);background:#d9480f1f;border-radius:14px;justify-content:center;align-items:center;display:flex}.grade-section{flex-direction:column;align-items:center;gap:12px;margin-bottom:24px;animation:.3s cubic-bezier(.16,1,.3,1) both fadeUp;display:flex}.grade-question{color:var(--muted);font-size:.88rem;font-weight:600}.grade-row{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.grade-btn{cursor:pointer;border:1px solid;border-radius:8px;padding:12px 26px;font-family:inherit;font-size:.92rem;font-weight:700;transition:transform .16s,box-shadow .16s}.grade-btn:hover{transform:translateY(-2px)}.grade-again{color:var(--danger);background:#c03a2b14;border-color:#c03a2b4d}.grade-hard{color:var(--yellow);background:#8c6d1f1a;border-color:#8c6d1f4d}.grade-good{color:var(--accent);background:#d9480f14;border-color:#d9480f4d}.grade-easy{color:var(--green);background:#3d7a461a;border-color:#3d7a464d}[data-theme=dark] .grade-hard{color:#d9a441}[data-theme=dark] .grade-easy{color:#86bf90}.type-card-top{justify-content:space-between;align-items:flex-start;margin-bottom:14px;display:flex}.type-card-iconchip{background:color-mix(in srgb, var(--chip-color) 12%, transparent);width:52px;height:52px;color:var(--chip-color);border-radius:9px;justify-content:center;align-items:center;display:flex}.lock-badge{color:var(--accent2);letter-spacing:.03em;background:#d9480f1a;border:1px solid #d9480f40;border-radius:99px;align-items:center;gap:5px;padding:5px 11px;font-size:.72rem;font-weight:700;display:inline-flex}.type-card.locked{opacity:.85}.page-header-iconchip{background:color-mix(in srgb, var(--chip-color) 12%, transparent);width:46px;height:46px;color:var(--chip-color);vertical-align:-12px;border-radius:8px;justify-content:center;align-items:center;margin-right:12px;display:inline-flex}.difficulty-dot{width:12px;height:12px;box-shadow:0 0 0 4px color-mix(in srgb, currentColor 0%, transparent);border-radius:50%;flex-shrink:0}.empty-illustration{justify-content:center;align-items:center;padding:10px 0 6px;display:flex;position:relative}.empty-cards{width:120px;height:84px;position:relative}.empty-card-mock{background:var(--bg2);box-shadow:var(--shadow-sm);border:2px solid #d9480f40;border-radius:8px;position:absolute;inset:0}.empty-card-mock.c1{background:#d9480f0f;transform:rotate(-8deg)translate(-10px)}.empty-card-mock.c2{background:#d9480f0f;transform:rotate(4deg)translate(10px)}.empty-card-mock.c3{background:var(--grad-main);border:none;justify-content:center;align-items:center;display:flex}.empty-card-mock.c3:after{content:"Aa";color:#fff;letter-spacing:-.02em;font-size:1.3rem;font-weight:700}.empty-spark{color:var(--accent2);position:absolute}.empty-spark.s1{top:-4px;right:calc(50% - 86px)}.empty-spark.s2{animation-delay:.8s;bottom:2px;left:calc(50% - 82px)}.shared-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px;display:grid}.shared-flashcard{background:var(--bg2);border:1px solid var(--border);min-height:160px;box-shadow:var(--shadow-sm);text-align:left;cursor:pointer;border-radius:10px;flex-direction:column;align-items:flex-start;gap:12px;padding:26px 24px;font-family:inherit;transition:transform .2s cubic-bezier(.16,1,.3,1),box-shadow .2s,border-color .2s;display:flex}.shared-flashcard:hover{border-color:var(--border-hover);transform:translateY(-2px)}.shared-flashcard.flipped{background:#d9480f12;border-color:#d9480f4d}.shared-flashcard p{color:var(--text);font-size:1rem;font-weight:500;line-height:1.6}.shared-mm-list{padding-left:0;list-style:none}.shared-mm-list:not(.root){border-left:2px solid #d9480f26;margin-top:8px;margin-left:8px;padding-left:26px}.shared-mm-item{margin-bottom:8px}.shared-mm-title{background:var(--bg2);border:1px solid var(--border);color:var(--text);border-radius:7px;padding:7px 14px;font-size:.88rem;font-weight:600;display:inline-block}.shared-mm-list.root>.shared-mm-item>.shared-mm-title{background:var(--grad-main);color:#fff;border:none;font-weight:700}:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}.flip-hint svg{vertical-align:-2px}[data-theme=dark] .folder-card,[data-theme=dark] .pricing-card,[data-theme=dark] .stats-panel,[data-theme=dark] .locked-state,[data-theme=dark] .shared-flashcard,[data-theme=dark] .move-menu,[data-theme=dark] .mm2-modal,[data-theme=dark] .site-footer,[data-theme=dark] .shared-mm-title{background:#2a231b}[data-theme=dark] .folder-paper{background:#ede6d8}[data-theme=dark] .deck-move-btn,[data-theme=dark] .folder-mini-btn{background:#211b14}[data-theme=dark] .pricing-notice{color:#d9a441}[data-theme=dark] .grade-again{color:#e08573}[data-theme=dark] .mm2-modal-close,[data-theme=dark] .api-key-value{background:#211b14}[data-theme=dark] .tier-badge.tier-ultra,[data-theme=dark] .tier-text.tier-ultra{color:#d9a441}[data-theme=dark] .tier-badge.tier-plus,[data-theme=dark] .tier-text.tier-plus{color:#9db8c9}[data-theme=dark] .empty-card-mock{background:#2a231b}[data-theme=dark] .empty-card-mock.c1,[data-theme=dark] .empty-card-mock.c2{background:#d9480f1f}[data-theme=dark] .empty-card-mock.c3{background:var(--grad-main)}@media (width<=1100px){.pricing-grid{grid-template-columns:1fr 1fr}}@media (width<=900px){.stats-panels{grid-template-columns:1fr}}@media (width<=640px){.pricing-grid{grid-template-columns:1fr}.folder-shelf{gap:10px}.folder-card{width:calc(50% - 5px)}.site-footer{padding:28px 20px}.footer-inner{flex-direction:column;align-items:flex-start;gap:12px}.mm2-controls{width:100%}.mm2-modal{padding:26px 22px}.grade-row{width:100%}.grade-btn{flex:1;padding:12px 10px;font-size:.85rem}.week-chart{height:150px}.page-header-iconchip{vertical-align:-10px;border-radius:11px;width:38px;height:38px;margin-right:9px}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}@media (width<=640px){.folder-mini-btn,.deck-move-btn{width:36px;height:36px}.footer-link{padding:12px 0}}