:root{--bg: #010409;--panel: #0d1117;--panel-raised: #161b22;--border: #30363d;--border-soft: #21262d;--border-faint: #1e2530;--text: #e6edf3;--text-dim: #8b949e;--text-faint: #56606b;--green: #4caf50;--green-deep: #1a6634;--red: #f44336;--red-deep: #7d1a1a;--blue: #2196f3;--blue-deep: #1f3a5f;--accent: #7c3aed;--amber: #ffeb3b;--mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", Menlo, Consolas, monospace}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{color-scheme:dark}body{background:var(--bg);color:var(--text);font-family:var(--mono);-webkit-font-smoothing:antialiased}button{font-family:inherit;color:inherit;background:none;border:none;cursor:pointer}button:disabled{cursor:not-allowed}:focus-visible{outline:2px solid var(--accent);outline-offset:1px}.app{min-height:100vh;padding:16px;max-width:1180px;margin:0 auto;display:flex;flex-direction:column}.header{display:flex;flex-wrap:wrap;align-items:center;gap:12px 16px;border-bottom:1px solid var(--border-soft);padding-bottom:12px;margin-bottom:16px}.header__brand{display:flex;align-items:center;gap:12px;margin-right:auto}.header__logo{width:36px;height:36px;flex:none}.header__title{font-size:18px;color:var(--accent);letter-spacing:2px;line-height:1.2}.header__tagline{margin-top:2px;font-size:11px;color:var(--text-dim)}.header__actions{display:flex;align-items:center;gap:8px}.scenario-select{background:var(--panel-raised);color:var(--text);border:1px solid var(--border);border-radius:6px;padding:7px 10px;font-family:var(--mono);font-size:12px;cursor:pointer}.btn-ghost{background:var(--panel-raised);border:1px solid var(--border);border-radius:6px;padding:7px 12px;font-size:12px;color:var(--text);transition:border-color .15s}.btn-ghost:hover{border-color:var(--text-dim)}.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px 260px;gap:16px;align-items:start}.panel-label{font-size:11px;color:var(--text-dim);margin-bottom:6px;letter-spacing:.5px}.card{background:var(--panel);border:1px solid var(--border);border-radius:8px;overflow:hidden}.ladder{-webkit-user-select:none;user-select:none}.ladder__header,.ladder__row{display:grid;grid-template-columns:minmax(64px,1fr) 96px minmax(64px,1fr) 84px}.ladder__header{background:var(--panel-raised);padding:6px 0;font-size:11px;color:var(--text-dim);border-bottom:2px solid var(--border);text-align:center}.ladder__body{max-height:480px;overflow-y:auto}.ladder__row{align-items:stretch;height:30px;border-bottom:1px solid var(--border-faint);font-size:13px}.ladder__row--last{background:#1a2840}.ladder__cell{position:relative;display:flex;align-items:center;height:100%;width:100%;font-size:13px}.ladder__cell--bid{justify-content:flex-end;padding-right:8px;color:var(--green)}.ladder__cell--ask{justify-content:flex-start;padding-left:8px;color:var(--red)}button.ladder__cell:hover{background:#7c3aed1f}.ladder__bar{position:absolute;top:0;height:100%;pointer-events:none}.ladder__bar--bid{right:0;background:#4caf5026}.ladder__bar--ask{left:0;background:#f4433626}.ladder__size{position:relative;z-index:1}.ladder__price{display:flex;align-items:center;justify-content:center;color:#90a4ae}.ladder__price--last{color:#fff;font-weight:700}.ladder__marker{color:var(--amber)}.ladder__orders{display:flex;align-items:center;justify-content:center;color:var(--amber);font-size:11px;white-space:nowrap}.panel{background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:16px;display:flex;flex-direction:column;gap:8px}.tick-status{font-size:12px;color:var(--text-dim);border-bottom:1px solid var(--border-soft);padding-bottom:8px;margin-bottom:4px;display:flex;justify-content:space-between;gap:8px}.tick-status strong{color:var(--text);font-weight:700}.progress{height:3px;background:var(--border-faint);border-radius:2px;overflow:hidden;margin-bottom:4px}.progress__fill{height:100%;background:var(--accent);transition:width .2s ease}.stat-row{display:flex;justify-content:space-between;align-items:baseline;padding:4px 0}.stat-row__label{color:var(--text-dim);font-size:13px}.stat-row__value{font-size:14px;font-weight:700}.pos-flat{color:#90a4ae}.pos-long,.pnl-pos{color:var(--green)}.pos-short,.pnl-neg{color:var(--red)}.pnl-zero{color:#90a4ae}.stat-accent{color:var(--accent)}.size-picker{display:flex;align-items:center;gap:6px;margin-top:8px}.size-picker__label{font-size:11px;color:var(--text-dim);margin-right:2px}.size-picker__btn{flex:1;padding:6px 0;font-size:13px;font-weight:700;border:1px solid var(--border);border-radius:6px;background:var(--panel-raised);color:var(--text-dim);transition:border-color .15s,color .15s}.size-picker__btn[aria-pressed=true]{border-color:var(--accent);color:var(--text);background:#7c3aed26}.btn-row{display:flex;gap:8px;margin-top:8px}.btn{flex:1;border-radius:6px;padding:10px 8px;font-size:14px;font-weight:700;color:#fff;transition:filter .15s}.btn:hover:not(:disabled){filter:brightness(1.25)}.btn:disabled{background:#1c2430;color:#555}.btn--buy{background:var(--green-deep)}.btn--sell{background:var(--red-deep)}.btn--step{background:var(--blue-deep)}.btn--play{background:#3d2a6d}.speed-picker{display:flex;gap:6px;align-items:center}.speed-picker .size-picker__btn{padding:4px 0;font-size:11px}.summary{text-align:center;border:1px solid var(--accent);border-radius:6px;margin-top:8px;padding:12px;display:flex;flex-direction:column;gap:8px}.summary__title{color:var(--accent);font-size:13px;letter-spacing:1px}.summary__score{font-size:26px;font-weight:700;color:var(--accent)}.summary__detail{font-size:12px;color:var(--text-dim)}.blotter{font-size:12px}.blotter__section{padding:10px 14px 8px}.blotter__section+.blotter__section{border-top:1px solid var(--border-soft)}.blotter__heading{color:var(--text-dim);margin-bottom:6px}.blotter__empty{color:var(--text-faint);padding:2px 0 4px}.blotter__row{display:grid;grid-template-columns:42px 34px 58px 42px 1fr auto;gap:4px;align-items:center;padding:3px 0;color:#c9d1d9;border-bottom:1px solid var(--panel-raised)}.blotter__row--fill{grid-template-columns:42px 62px 40px 1fr}.side-buy{color:var(--green)}.side-sell{color:var(--red)}.status-open{color:var(--green)}.status-filled{color:var(--blue)}.status-cancelled{color:var(--text-faint)}.blotter__cancel{font-size:10px;color:var(--text-dim);border:1px solid var(--border);border-radius:4px;padding:1px 6px;justify-self:end}.blotter__cancel:hover{color:var(--red);border-color:var(--red)}.sparkline-card{padding:12px 14px 8px;margin-bottom:16px}.sparkline-card svg{display:block;width:100%;height:56px}.sparkline-card__caption{display:flex;justify-content:space-between;font-size:10px;color:var(--text-faint);margin-top:4px}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#010409cc;display:flex;align-items:center;justify-content:center;padding:16px;z-index:50}.modal{background:var(--panel);border:1px solid var(--border);border-radius:10px;max-width:560px;width:100%;max-height:85vh;overflow-y:auto;padding:24px}.modal h2{color:var(--accent);font-size:16px;letter-spacing:1px;margin-bottom:12px}.modal h3{font-size:13px;color:var(--text);margin:16px 0 6px}.modal p,.modal li{font-size:13px;color:var(--text-dim);line-height:1.6}.modal ol,.modal ul{padding-left:20px}.modal kbd{background:var(--panel-raised);border:1px solid var(--border);border-radius:4px;padding:1px 6px;font-family:var(--mono);font-size:11px;color:var(--text)}.modal table{border-collapse:collapse;width:100%;font-size:12px;color:var(--text-dim)}.modal td,.modal th{border:1px solid var(--border-soft);padding:5px 8px;text-align:left}.modal th{color:var(--text)}.modal__close-row{margin-top:20px;display:flex;justify-content:flex-end}.toast{position:fixed;bottom:20px;left:50%;transform:translate(-50%);background:var(--panel-raised);border:1px solid var(--accent);color:var(--text);border-radius:6px;padding:8px 16px;font-size:12px;z-index:60;pointer-events:none}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.footer{margin-top:20px;padding-top:12px;border-top:1px solid var(--border-soft);font-size:11px;color:var(--text-faint);text-align:center;line-height:1.8}.footer kbd{background:var(--panel-raised);border:1px solid var(--border-soft);border-radius:4px;padding:0 5px;font-family:var(--mono)}@media(max-width:1020px){.layout{grid-template-columns:minmax(0,1fr) 300px}.layout>.col-blotter{grid-column:1 / -1}}@media(max-width:720px){.app{padding:12px}.layout{grid-template-columns:minmax(0,1fr)}.layout>.col-controls{order:-1}.ladder__body{max-height:320px}.ladder__header,.ladder__row{grid-template-columns:minmax(56px,1fr) 80px minmax(56px,1fr) 64px}.btn{padding:12px 8px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important}}