:root{--bg: #080b11;--bg2: #0e131c;--card: #121926;--card2: #18222f;--text: #f3f7ff;--muted: #8595af;--accent: #3b82f6;--accent2: #60a5fa;--accent-deep: #1d4ed8;--line: #1c2636;--good: #22c55e;--warn: #f59e0b;--bad: #ef4444;--safe-bottom: env(safe-area-inset-bottom, 0px);--safe-top: env(safe-area-inset-top, 0px)}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;overscroll-behavior-y:none}button{font-family:inherit;cursor:pointer}.splash{display:grid;place-items:center;height:100%;color:var(--muted)}.app{display:flex;flex-direction:column;height:100%;max-width:560px;margin:0 auto}.screen{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch}.pad{padding:calc(16px + var(--safe-top)) 16px 100px}.home-head{display:flex;justify-content:space-between;align-items:flex-end;margin:8px 0 18px}.home-head h1{font-size:30px;margin:4px 0 0;letter-spacing:-.6px;font-weight:800}.hello{color:var(--muted);font-size:14px}.section-title{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:1.2px;margin:26px 0 12px;font-weight:700}.edit-toggle{background:none;border:1px solid var(--line);color:var(--accent2);border-radius:10px;padding:6px 12px;font-size:13px;font-weight:600}.stat-row{display:flex;gap:10px}.chip{flex:1;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:12px;display:flex;flex-direction:column;gap:2px}.chip .big{font-size:20px;font-weight:800}.chip span:not(.big){font-size:12px;color:var(--muted)}.goalbar{height:5px;background:var(--bg2);border-radius:99px;margin-top:8px;overflow:hidden}.goalbar>div{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2));transition:width .3s}.grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.tile-wrap{position:relative}.tile{position:relative;width:100%;text-align:left;color:var(--text);background:var(--card);border:1px solid var(--line);border-radius:18px;padding:16px;min-height:118px;display:flex;flex-direction:column;gap:6px;overflow:hidden;transition:transform .08s,border-color .15s}.tile:active{transform:scale(.97)}.tile:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;opacity:.14;background:radial-gradient(circle at 85% 0%,var(--accent, #3b82f6),transparent 60%)}.tile-emoji{font-size:28px}.tile-name{font-weight:700;font-size:16px}.tile-meta{margin-top:auto;display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--muted)}.due-dot{background:var(--accent);color:#fff;padding:2px 9px;border-radius:99px;font-weight:700;font-size:12px}.tile-edit{display:flex;gap:4px;justify-content:center;margin-top:6px}.tile-edit button,.row-edit button{background:var(--card2);border:1px solid var(--line);color:var(--text);border-radius:8px;padding:5px 9px;font-size:13px}.tile-edit .del,.row-edit .del{color:var(--bad)}.list{display:flex;flex-direction:column;gap:8px}.row-wrap{display:flex;flex-direction:column;gap:6px}.nav-row{display:flex;align-items:center;gap:10px;text-align:left;color:var(--text);background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px 16px;width:100%}.nav-row:active{border-color:var(--accent)}.nav-row-main{flex:1;min-width:0}.nav-row-title{font-weight:650;font-size:16px}.nav-row-sub{color:var(--muted);font-size:13px;margin-top:2px}.chev{color:var(--muted);font-size:22px;line-height:1}.row-edit{display:flex;gap:6px;padding-left:4px}.topbar{display:flex;align-items:center;gap:8px;margin-bottom:12px}.topbar-title{font-weight:700;font-size:18px;flex:1;text-align:center}.topbar-right{min-width:56px;text-align:right}.link{background:none;border:none;color:var(--accent2);font-size:15px;padding:6px}.link.danger{color:var(--bad)}.btn{border:none;border-radius:13px;padding:13px 16px;font-size:15px;font-weight:650}.btn.primary{background:linear-gradient(90deg,var(--accent-deep),var(--accent));color:#fff}.btn.ghost{background:var(--card);color:var(--text);border:1px solid var(--line)}.btn.full{width:100%}.btn.small{padding:9px 13px;font-size:13px}.btn:disabled{opacity:.45}.cta-row{display:flex;gap:10px;margin:14px 0}.big-btn{flex:1}.add-btn{margin-top:12px}.add-inline{display:flex;gap:8px;margin-top:12px}.add-inline input{flex:1;background:var(--card);border:1px solid var(--line);color:var(--text);border-radius:12px;padding:12px;font-size:16px}.card-list{display:flex;flex-direction:column;gap:10px}.row-card{text-align:left;color:var(--text);background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px}.row-q{font-weight:650;font-size:16px}.row-sum{color:var(--muted);font-size:14px;margin-top:4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.row-foot{display:flex;align-items:center;gap:10px;margin-top:10px}.mini-bar{flex:1;height:5px;background:var(--bg2);border-radius:99px;overflow:hidden}.mini-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--good))}.muted{color:var(--muted);font-size:13px}.detail .label{font-size:12px;letter-spacing:1px;text-transform:uppercase;color:var(--muted);margin:18px 0 6px}.detail .q{font-size:22px;margin:0;line-height:1.3}.summary-box{background:var(--card);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:12px;padding:14px;font-size:16px;line-height:1.5}.apply-box{background:#3b82f61a;border:1px solid var(--accent);border-radius:12px;padding:14px;font-size:15px;line-height:1.5}.deepdive{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:4px 16px;margin-top:12px}.deepdive.small{font-size:14px}.conn-list{display:flex;flex-direction:column;gap:8px}.conn-chip{text-align:left;background:var(--card2);border:1px solid var(--line);color:var(--accent2);border-radius:10px;padding:10px 12px;font-size:14px}.card-foot{display:flex;align-items:center;justify-content:space-between;margin-top:22px}.src-tag{font-size:13px;color:var(--muted);background:var(--card);border:1px solid var(--line);border-radius:99px;padding:5px 12px}.del-card{display:block;margin:24px auto 0}.md h2,.md h3,.md h4,.md h5{margin:16px 0 8px;line-height:1.25}.md h2{font-size:19px}.md h3{font-size:17px}.md h4{font-size:15px;color:var(--accent2)}.md p{line-height:1.6}.md ul,.md ol{padding-left:20px}.md li{margin:5px 0;line-height:1.5}.md code{background:var(--bg2);padding:2px 6px;border-radius:6px;font-size:.9em}.md blockquote{border-left:3px solid var(--accent);margin:10px 0;padding:4px 12px;color:var(--muted)}.md strong{color:#fff}.study{display:flex;flex-direction:column;height:100%;padding:calc(12px + var(--safe-top)) 16px calc(16px + var(--safe-bottom))}.study-top{display:flex;align-items:center;gap:12px}.progress{flex:1;height:6px;background:var(--bg2);border-radius:99px;overflow:hidden}.progress i{display:block;height:100%;background:linear-gradient(90deg,var(--accent-deep),var(--accent2));transition:width .3s}.count{color:var(--muted);font-size:13px;font-variant-numeric:tabular-nums}.flashcard{flex:1;margin:16px 0;border-radius:22px;background:var(--card2);border:1px solid var(--line);padding:24px;overflow-y:auto;display:flex;box-shadow:0 12px 40px #0006}.face{width:100%;display:flex;flex-direction:column}.face-label{font-size:12px;letter-spacing:2px;color:var(--muted)}.face-q{font-size:25px;font-weight:750;line-height:1.3;margin:auto 0;text-align:center}.face-a{font-size:20px;line-height:1.5;margin:18px 0}.front{align-items:center;justify-content:center}.front .face-q{margin:20px 0}.tap-hint{color:var(--muted);font-size:13px;margin-top:auto}.back{align-items:stretch}.rate-row{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.rate{border:none;border-radius:13px;padding:16px 6px;font-weight:700;font-size:14px;color:#fff}.rate.again{background:#ef4444}.rate.hard{background:#f59e0b}.rate.good{background:#22c55e}.rate.easy{background:var(--accent)}.center-screen{display:grid;place-items:center;min-height:70vh}.finish{text-align:center}.finish-emoji{font-size:64px}.field{display:flex;flex-direction:column;gap:6px;margin:14px 0}.field>span{font-size:13px;color:var(--muted);font-weight:600}.field input,.field select,.field textarea{background:var(--card);border:1px solid var(--line);color:var(--text);border-radius:12px;padding:12px;font-size:16px;width:100%;resize:vertical}.field-row{display:flex;gap:10px}.field-row .field{flex:1}.card-form{background:var(--bg2);border:1px solid var(--line);border-radius:16px;padding:12px;margin:12px 0 16px}.banner{background:#3b82f624;border:1px solid var(--accent);border-radius:12px;padding:12px;font-size:14px;margin:12px 0}.error{background:#ef44441f;border:1px solid var(--bad);color:#fecaca;border-radius:12px;padding:12px;margin-top:12px;font-size:14px}.empty{color:var(--muted);text-align:center;padding:36px 20px}.prev-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px;margin-bottom:12px}.prev-card .label{font-size:11px;color:var(--muted);letter-spacing:1px;margin-top:10px}.prev-card .q{font-weight:650;font-size:16px}.prev-card details summary{color:var(--accent2);margin-top:10px;cursor:pointer}.file-btn{display:inline-flex;align-items:center}.foot-note{text-align:center;margin-top:30px}.bottomnav{display:flex;border-top:1px solid var(--line);background:#080b11eb;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);padding-bottom:var(--safe-bottom)}.nav-btn{flex:1;background:none;border:none;color:var(--muted);padding:10px 0 8px;display:flex;flex-direction:column;align-items:center;gap:2px;font-size:11px}.nav-btn.active{color:var(--accent2)}.nav-icon{font-size:22px}