:root{--accent: #3d55c8;--accent-strong: #2f44a8;--accent-weak: #e9edfb;--accent-contrast: #ffffff;--bg: #f4f5f1;--bg-card: #ffffff;--bg-hover: #edeef0;--bg-active: #e6e9f9;--fg: #1b2330;--fg-secondary: #454f61;--fg-dim: #616b7d;--danger: #c73545;--danger-weak: #fbe9eb;--success: #1f8a5a;--warning: #b07a15;--border: #e3e5dd;--border-strong: #cccfc6;--shadow-sm: 0 1px 2px rgba(27, 35, 48, .05), 0 1px 3px rgba(27, 35, 48, .06);--shadow-md: 0 2px 4px rgba(27, 35, 48, .05), 0 8px 24px rgba(27, 35, 48, .09);--shadow-lg: 0 4px 12px rgba(27, 35, 48, .08), 0 20px 48px rgba(27, 35, 48, .16);--r-sm: 8px;--r-md: 11px;--r-lg: 14px;--r-xl: 18px;--ease: cubic-bezier(.22, 1, .36, 1);--t-fast: .12s var(--ease);--t-med: .18s var(--ease)}[data-theme=dark]{--accent: #8b9dff;--accent-strong: #a3b1ff;--accent-weak: #2a3356;--accent-contrast: #10132b;--bg: #14161b;--bg-card: #1d2027;--bg-hover: #262a33;--bg-active: #2c3350;--fg: #e8eaf0;--fg-secondary: #aab2c1;--fg-dim: #7d8595;--danger: 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var(--accent-weak)}.progress{height:6px;border-radius:99px;background:var(--bg-hover);overflow:hidden;cursor:pointer}.progress>div{height:100%;width:100%;background:var(--accent);border-radius:99px;transform-origin:left center;transform:scaleX(0);transition:transform .1s linear}.waveform{display:flex;align-items:center;gap:2px;height:34px;cursor:pointer;padding:0 2px;border-radius:6px;background:var(--bg)}.waveform span{flex:1;min-width:1.5px;border-radius:2px;transition:background var(--t-fast)}.row{display:flex;align-items:center;gap:8px}.row.wrap{flex-wrap:wrap}.flashcard{border:1px solid var(--border);border-radius:var(--r-lg);padding:20px 16px;min-height:118px;display:flex;align-items:center;justify-content:center;text-align:center;cursor:pointer;background:var(--bg);font-size:15px;line-height:1.6;transition:border-color var(--t-fast),box-shadow var(--t-fast)}.flashcard:hover{border-color:var(--accent);box-shadow:0 0 0 3px 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var(--border);border-radius:var(--r-md);padding:13px;line-height:1.75;font-size:13.5px}.modal-mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f131e7a;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);display:flex;align-items:center;justify-content:center;z-index:100;animation:fade-in .14s var(--ease)}@keyframes fade-in{0%{opacity:0}}.modal{background:var(--bg-card);border-radius:var(--r-xl);padding:22px;width:min(430px,92vw);max-height:86vh;overflow:auto;display:flex;flex-direction:column;gap:13px;box-shadow:var(--shadow-lg);border:1px solid var(--border);animation:pop-in .15s var(--ease)}@keyframes pop-in{0%{opacity:0;transform:scale(.97) translateY(6px)}}.modal h3{margin:0;font-size:16px;font-weight:650}.dropdown{position:absolute;z-index:80;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-lg);display:flex;flex-direction:column;padding:6px;min-width:200px;transform-origin:top right;animation:menu-in .15s var(--ease)}.dropdown button{text-align:left;white-space:nowrap;border-radius:var(--r-sm);height:34px;padding:0 11px;display:flex;align-items:center;gap:10px;font-size:13px;transition:background var(--t-fast),color var(--t-fast)}.dropdown button:hover{background:var(--bg-hover)}.dropdown button:active{background:var(--bg-active)}.dropdown button:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}.dropdown button svg{color:var(--fg-dim);transition:color var(--t-fast)}.dropdown button:hover svg{color:var(--accent)}.dropdown button.danger,.dropdown button.danger svg{color:var(--danger)}.dropdown button.danger:hover{background:var(--danger-weak)}.dropdown button.danger:hover svg{color:var(--danger)}.dropdown hr{border:none;border-top:1px solid var(--border);margin:5px 8px}.dropdown .row{padding:0;gap:2px}.dropdown .row button{flex:1}.dropdown .row .btn.danger{flex:none;width:30px;height:30px;border-radius:var(--r-sm);opacity:.75}.dropdown .row .btn.danger:hover{opacity:1}@keyframes menu-in{0%{opacity:0;transform:scale(.96) translateY(-5px)}}.select{position:relative;display:inline-flex}.select-trigger{display:inline-flex;align-items:center;justify-content:space-between;gap:8px;width:100%;height:34px;padding:0 9px 0 11px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-sm);font-size:13px;color:var(--fg);white-space:nowrap;transition:border-color var(--t-fast),background var(--t-fast),box-shadow var(--t-fast)}.select-trigger:hover{border-color:var(--border-strong);background:var(--bg-hover)}.select-trigger[aria-expanded=true]{border-color:var(--accent);background:var(--bg-card);box-shadow:0 0 0 3px var(--accent-weak)}.select-trigger svg{color:var(--fg-dim);flex-shrink:0;transition:transform var(--t-fast)}.select-trigger[aria-expanded=true] svg{transform:rotate(180deg)}.select.sm .select-trigger{height:28px;font-size:12px;padding:0 6px 0 9px;gap:5px}.select-menu{top:calc(100% + 4px);min-width:100%;transform-origin:top right}.select.align-left .select-menu{transform-origin:top left}.select-menu button.selected{color:var(--accent);background:var(--accent-weak)}.select-menu button.selected svg{color:var(--accent)}.select-menu button.selected:hover{background:var(--accent-weak)}.toasts{position:fixed;bottom:20px;left:50%;transform:translate(-50%);z-index:200;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none}.toast{display:inline-flex;align-items:center;gap:8px;background:var(--fg);color:var(--bg-card);padding:10px 17px;border-radius:99px;box-shadow:var(--shadow-lg);font-size:13px;animation:toast-in .2s var(--ease);max-width:78vw}[data-theme=dark] .toast{background:#e8eaf0;color:#14161b}.toast.error{background:var(--danger);color:#fff}.toast svg{flex-shrink:0}@keyframes toast-in{0%{opacity:0;transform:translateY(8px) scale(.97)}}.empty{text-align:center;color:var(--fg-dim);padding:72px 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input:checked+span:after{transform:translate(16px)}.settings{flex:1;overflow:auto;padding:26px 24px 60px;max-width:720px;margin:0 auto;width:100%}.settings section{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-lg);padding:20px;margin-bottom:16px;display:flex;flex-direction:column;gap:12px;box-shadow:var(--shadow-sm)}.settings h2{font-size:15.5px;font-weight:650;margin:0 0 2px;display:flex;align-items:center;gap:8px}.settings h2 svg{color:var(--accent)}.settings h1{font-size:20px;font-weight:650;margin:0}.quota-bar{height:7px;border-radius:99px;background:var(--bg-hover);overflow:hidden}.quota-bar>div{height:100%;background:var(--accent);border-radius:99px}kbd{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:11.5px;background:var(--bg-hover);border:1px solid var(--border);border-bottom-width:2px;border-radius:5px;padding:1px 6px}.auth{flex:1;display:grid;grid-template-columns:minmax(380px,5fr) 6fr;min-height:0}.auth-brand{background:#1b2330;color:#eef0f6;padding:48px 52px;display:flex;flex-direction:column;overflow:auto;background-image:linear-gradient(rgba(139,157,255,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(139,157,255,.055) 1px,transparent 1px);background-size:26px 26px}[data-theme=dark] .auth-brand{background-color:#10141f}.auth-brand .brand{color:#fff;font-size:20px}.auth-brand .brand .brand-mark{background:var(--accent)}.auth-tagline{font-size:26px;font-weight:650;line-height:1.42;margin:56px 0 14px;letter-spacing:.3px}.auth-tagline em{font-style:normal;color:#a9b8ff}.auth-points{display:flex;flex-direction:column;gap:18px;margin-top:34px}.auth-point{display:flex;gap:13px;align-items:flex-start}.auth-point svg{color:#a9b8ff;margin-top:2px;flex-shrink:0}.auth-point b{display:block;font-size:14px;font-weight:600}.auth-point span{font-size:12.5px;color:#9aa3b8;line-height:1.55;display:block;margin-top:2px}.auth-foot{margin-top:auto;padding-top:40px;font-size:12px;color:#6d7689}.auth-main{display:flex;align-items:center;justify-content:center;padding:32px 24px;overflow:auto}.auth-card{width:min(380px,100%);display:flex;flex-direction:column;gap:15px}.auth-card h1{font-size:22px;font-weight:650;margin:0}.auth-card .sub{color:var(--fg-dim);font-size:13.5px;margin-top:-9px}.auth-tabs{display:flex;background:var(--bg-hover);border-radius:10px;padding:4px;gap:4px}.auth-tabs button{flex:1;height:32px;border-radius:7px;font-size:13.5px;font-weight:500;color:var(--fg-dim);transition:background var(--t-fast),color var(--t-fast),box-shadow var(--t-fast)}.auth-tabs button.active{background:var(--bg-card);color:var(--fg);box-shadow:var(--shadow-sm)}.auth-field{display:flex;flex-direction:column;gap:6px}.auth-field label{font-size:12.5px;font-weight:500;color:var(--fg-secondary)}.auth-error{background:var(--danger-weak);color:var(--danger);font-size:12.5px;border-radius:var(--r-sm);padding:9px 12px;display:flex;gap:7px;align-items:flex-start}@media(max-width:860px){.auth{grid-template-columns:1fr}.auth-brand{display:none}}@media(max-width:760px){.side-panel{position:fixed;right:0;top:0;bottom:0;z-index:70;width:min(340px,92vw);box-shadow:var(--shadow-lg)}.page-rail{width:64px}.library{padding:16px 14px 40px}.lib-head input{width:100%!important}}.swatch-btn{width:22px;height:22px;border-radius:50%;flex-shrink:0;border:2px solid var(--bg-card);outline:1px solid var(--border);cursor:pointer;padding:0;transition:transform var(--t-fast),outline-color var(--t-fast)}.swatch-btn:hover{transform:scale(1.12)}.swatch-btn.active{outline:2px solid var(--accent);transform:scale(1.06)}.color-input{width:24px;height:24px;padding:0;border-radius:50%;border:1px solid var(--border);background:none;cursor:pointer;overflow:hidden}.color-input::-webkit-color-swatch-wrapper{padding:0}.color-input::-webkit-color-swatch{border:none;border-radius:50%}.spin-icon{animation:rotate .9s linear infinite}@media(hover:none){.card .menu{opacity:1}}.sticker-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.sticker-cell{aspect-ratio:1;border:1px solid var(--border);border-radius:10px;background:var(--bg-card);display:flex;align-items:center;justify-content:center;cursor:pointer;padding:8px;position:relative;transition:border-color var(--t-fast),transform var(--t-fast)}.sticker-cell:hover{border-color:var(--accent);transform:scale(1.05)}.sticker-cell img{width:100%;height:100%;object-fit:contain;pointer-events:none}.sticker-cell.mine button:first-child{width:100%;height:100%;padding:8px;background:none;border:none;cursor:pointer}.sticker-del{position:absolute;top:-5px;right:-5px;width:17px;height:17px;border-radius:50%;background:var(--fg);color:var(--bg-card);display:none;align-items:center;justify-content:center;padding:0}.sticker-cell.mine:hover .sticker-del{display:inline-flex}@media(hover:none){.sticker-del{display:inline-flex}}