:root{font-family:system-ui,-apple-system,sans-serif;--bg: #0f172a;--panel: #1e293b;--card: #334155;--text: #e2e8f0}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}.app{padding:16px}.topbar{display:flex;align-items:center;gap:12px;margin-bottom:16px}.topbar h1{font-size:20px;margin:0}.badge{background:#f59e0b;color:#1e293b;border-radius:6px;padding:2px 8px;font-size:12px;font-weight:600}.add-col{margin-left:auto}button{cursor:pointer;background:var(--card);color:var(--text);border:1px solid #475569;border-radius:6px;padding:4px 8px}.board{display:flex;gap:12px;align-items:flex-start;overflow-x:auto;padding-bottom:12px}.column{background:var(--panel);border-radius:10px;padding:10px;min-width:260px;width:260px}.col-header{display:flex;flex-direction:column;gap:6px;border-left:4px solid;padding-left:8px;margin-bottom:8px;font-weight:600}.col-tools{display:flex;gap:4px;align-items:center;flex-wrap:wrap}.swatch{width:16px;height:16px;border-radius:50%;border:none;padding:0}.cards{display:flex;flex-direction:column;gap:8px;min-height:24px}.card{position:relative;background:var(--card);border-radius:8px;padding:8px 24px 8px 8px}.card-title{cursor:text}.card-desc{margin:4px 0 0;font-size:13px;color:#cbd5e1}.tags{display:flex;gap:4px;margin-top:6px;flex-wrap:wrap}.tag{background:#475569;border-radius:4px;padding:1px 6px;font-size:11px;display:inline-flex;align-items:center;gap:4px}.tag-del{border:none;background:transparent;color:#cbd5e1;padding:0;cursor:pointer;line-height:1}.tag-input{background:transparent;border:1px dashed #475569;border-radius:4px;color:var(--text);font-size:11px;padding:1px 6px;width:60px}.card-desc-placeholder{color:#64748b;font-style:italic;cursor:text}.card-desc{cursor:text}.card textarea{width:100%;background:#0f172a;color:var(--text);border:1px solid #475569;border-radius:6px;padding:6px;font:inherit;resize:vertical;margin-top:4px}.card-del{position:absolute;top:4px;right:4px;border:none;background:transparent;color:#94a3b8}.add-card input,.col-header input{width:100%;background:#0f172a;color:var(--text);border:1px solid #475569;border-radius:6px;padding:6px}.add-card{margin-bottom:8px}.error-banner{background:#7f1d1d;color:#fecaca;padding:8px 12px;border-radius:6px;margin-bottom:12px}.toast{position:fixed;bottom:16px;right:16px;background:#7f1d1d;color:#fecaca;padding:10px 14px;border-radius:8px}.screen{max-width:480px;margin:80px auto;text-align:center;line-height:1.6}.screen a,code{color:#38bdf8}.error-screen{min-height:100dvh;display:grid;place-items:center;padding:24px}.error-panel{width:100%;max-width:400px;background:var(--panel);border:1px solid #334155;border-left:4px solid #f43f5e;border-radius:12px;padding:28px 26px 24px;box-shadow:0 20px 50px -20px #0009;animation:error-rise .32s cubic-bezier(.2,.7,.2,1) both}.error-glyph{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px;background:#f43f5e24;color:#fb7185;margin-bottom:16px}.error-eyebrow{margin:0 0 4px;font-size:11px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:#fb7185}.error-title{margin:0 0 10px;font-size:22px;font-weight:700;letter-spacing:-.01em}.error-lead{margin:0 0 8px;color:#e2e8f0;line-height:1.5}.error-help{margin:0 0 20px;font-size:13px;color:#94a3b8;line-height:1.5}.error-actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.error-retry{background:#f43f5e;color:#fff;border:none;border-radius:8px;padding:9px 16px;font-weight:600;font-size:14px}.error-retry:hover{background:#e11d48}.error-retry:focus-visible{outline:2px solid #38bdf8;outline-offset:2px;border-radius:6px}@keyframes error-rise{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}@media(prefers-reduced-motion:reduce){.error-panel{animation:none}}