:root{--bg: #1a1a2e;--bg-panel: #16162a;--bg-card: #1f1f38;--accent: #00d4ff;--accent-dim: #0a8bb0;--border: #2c2c4a;--text: #e6e6f0;--text-dim: #8a8aa8;--new: #00ff9d;--mono: "SFMono-Regular", "JetBrains Mono", "Fira Code", Consolas, "Liberation Mono", Menlo, monospace;--sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:var(--sans);-webkit-font-smoothing:antialiased}.app{display:grid;grid-template-columns:300px 1fr;min-height:100vh}.sidebar{background:var(--bg-panel);border-right:1px solid var(--border);padding:20px;position:sticky;top:0;height:100vh;overflow-y:auto}.main{padding:20px 28px 60px;max-width:920px}.brand{display:flex;align-items:center;gap:10px;margin-bottom:4px}.brand h1{font-size:22px;margin:0;letter-spacing:.5px}.brand .bolt{color:var(--accent);font-size:24px;filter:drop-shadow(0 0 6px var(--accent-dim))}.brand .feed-accent{color:var(--accent)}.tagline{color:var(--text-dim);font-size:12px;margin:0 0 22px;font-family:var(--mono)}.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px;flex-wrap:wrap}.topbar h2{margin:0;font-size:18px;display:flex;align-items:center;gap:10px}.badge{background:var(--new);color:#04241a;font-family:var(--mono);font-size:12px;font-weight:700;padding:2px 9px;border-radius:11px;box-shadow:0 0 10px #00ff9d66}.badge.zero{background:var(--border);color:var(--text-dim);box-shadow:none}button{cursor:pointer;font-family:var(--sans)}.btn{background:transparent;color:var(--accent);border:1px solid var(--accent-dim);border-radius:6px;padding:7px 12px;font-size:13px;transition:all .15s ease}.btn:hover{background:var(--accent);color:#04181f;box-shadow:0 0 12px #00d4ff66}.btn:disabled{opacity:.4;cursor:not-allowed}.sub-form{display:flex;gap:8px;margin-bottom:16px}.sub-input{flex:1;background:var(--bg-card);border:1px solid var(--border);color:var(--text);padding:9px 11px;border-radius:6px;font-size:13px;font-family:var(--mono);min-width:0}.sub-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 2px #00d4ff26}.add-btn{background:var(--accent);color:#04181f;border:none;border-radius:6px;padding:0 14px;font-weight:700;font-size:16px}.add-btn:hover{box-shadow:0 0 12px #00d4ff80}.section-label{font-family:var(--mono);font-size:11px;text-transform:uppercase;letter-spacing:1.5px;color:var(--text-dim);margin:0 0 10px}.sub-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:7px}.sub-item{display:flex;align-items:center;justify-content:space-between;background:var(--bg-card);border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:5px;padding:8px 8px 8px 11px;font-family:var(--mono);font-size:13px}.sub-remove{background:transparent;border:none;color:var(--text-dim);font-size:17px;line-height:1;padding:0 5px}.sub-remove:hover{color:#f57}.sub-empty{color:var(--text-dim);font-size:13px;font-family:var(--mono);line-height:1.6}.suggestions{margin-top:16px}.chip{display:inline-block;background:var(--bg-card);border:1px solid var(--border);color:var(--text-dim);border-radius:14px;padding:4px 10px;font-size:12px;font-family:var(--mono);margin:0 6px 6px 0}.chip:hover{border-color:var(--accent);color:var(--accent)}.filter-bar{display:flex;align-items:center;gap:7px;flex-wrap:wrap;margin-bottom:20px}.filter-chip{background:var(--bg-card);border:1px solid var(--border);color:var(--text-dim);border-radius:14px;padding:4px 12px;font-size:12px;font-family:var(--mono)}.filter-chip.active{border-color:var(--accent);color:var(--accent);background:#00d4ff14}.feed{display:flex;flex-direction:column;gap:14px}.card{position:relative;background:linear-gradient(180deg,var(--bg-card),#1a1a30);border:1px solid var(--border);border-radius:8px;padding:16px 18px;box-shadow:inset 0 1px #ffffff08,0 2px 8px #0000004d;transition:border-color .15s ease,transform .1s ease}.card:hover{border-color:var(--accent-dim);transform:translateY(-1px)}.card.is-new{border-color:#00ff9d80;box-shadow:0 0 16px #00ff9d1f,inset 0 1px #ffffff08}.card-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.card-title{font-size:17px;font-weight:600;margin:0}.card-artist{color:var(--accent);font-size:14px;margin:2px 0 0;font-family:var(--mono)}.new-tag{background:var(--new);color:#04241a;font-family:var(--mono);font-size:10px;font-weight:700;letter-spacing:1px;padding:2px 7px;border-radius:4px;flex-shrink:0;box-shadow:0 0 8px #00ff9d66}.card-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;font-family:var(--mono);font-size:12px}.meta-pill{background:#00000040;border:1px solid var(--border);border-radius:4px;padding:3px 8px;color:var(--text-dim)}.meta-pill b{color:var(--text);font-weight:600}.diff-Beginner{color:#00ff9d}.diff-Intermediate{color:#ffd23f}.diff-Advanced{color:#ff8a3d}.diff-Expert{color:#f57}.card-bottom{display:flex;align-items:center;justify-content:space-between;margin-top:12px;font-family:var(--mono);font-size:11px;color:var(--text-dim)}.card-link{color:var(--accent);text-decoration:none}.card-link:hover{text-decoration:underline}.empty{border:1px dashed var(--border);border-radius:10px;padding:48px 32px;text-align:center;color:var(--text-dim)}.empty .big{font-size:40px;margin-bottom:12px;filter:drop-shadow(0 0 10px var(--accent-dim))}.empty h3{color:var(--text);margin:0 0 8px}.empty p{margin:6px 0;font-size:14px;line-height:1.6}.empty code{font-family:var(--mono);color:var(--accent);background:#00d4ff14;padding:1px 6px;border-radius:4px}.live-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--new);box-shadow:0 0 8px var(--new);animation:pulse 2s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.3}}.status-line{font-family:var(--mono);font-size:11px;color:var(--text-dim);display:flex;align-items:center;gap:7px;margin-top:24px}@media (max-width: 720px){.app{grid-template-columns:1fr}.sidebar{position:relative;height:auto}}