:root{color-scheme:dark;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;--bg: #0a0a0a;--surface: #141418;--surface-hover: #1a1a20;--border: rgba(255, 255, 255, .08);--text: #fafafa;--text-muted: rgba(255, 255, 255, .55);--accent: #7c6cff;--accent-glow: rgba(124, 108, 255, .15);--good: #34d399;--ok: #fbbf24;--bad: #f87171;--radius: .75rem}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{min-height:100vh;background:var(--bg);color:var(--text)}.app{max-width:52rem;margin:0 auto;padding:2rem 1.5rem 4rem}.header{text-align:center;margin-bottom:2.5rem}.header h1{font-size:1.75rem;font-weight:700;letter-spacing:-.03em;margin-bottom:.25rem}.header h1 span{color:var(--accent)}.header p{color:var(--text-muted);font-size:.9rem}.tabs{display:flex;gap:.25rem;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:.25rem;margin-bottom:2rem}.tab-btn{flex:1;padding:.6rem 1rem;border:none;border-radius:calc(var(--radius) - 4px);background:transparent;color:var(--text-muted);font-size:.85rem;font-weight:500;cursor:pointer;transition:all .2s}.tab-btn:hover{color:var(--text);background:#ffffff0a}.tab-btn.active{background:var(--accent);color:#fff;box-shadow:0 2px 8px #7c6cff4d}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;margin-bottom:1.25rem}.card-title{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted);margin-bottom:1rem}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.form-group{display:flex;flex-direction:column;gap:.35rem}.form-group.full{grid-column:1 / -1}.form-group label{font-size:.8rem;font-weight:500;color:var(--text-muted)}.form-group input,.form-group select,.form-group textarea{padding:.6rem .75rem;border:1px solid var(--border);border-radius:calc(var(--radius) - 4px);background:var(--bg);color:var(--text);font-size:.9rem;font-family:inherit;outline:none;transition:border-color .2s}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.form-group textarea{resize:vertical;min-height:4rem}.quality-selector{display:flex;gap:.5rem;margin-top:.25rem}.quality-btn{flex:1;padding:.5rem;border:1px solid var(--border);border-radius:calc(var(--radius) - 4px);background:var(--bg);color:var(--text-muted);font-size:.8rem;font-weight:500;cursor:pointer;transition:all .2s;text-align:center}.quality-btn:hover{border-color:#fff3;color:var(--text)}.quality-btn.selected{border-color:var(--accent);background:var(--accent-glow);color:#fff}.quality-btn[data-quality="1"].selected{border-color:var(--bad);background:#f8717126}.quality-btn[data-quality="2"].selected{border-color:var(--ok);background:#fbbf2426}.quality-btn[data-quality="3"].selected{border-color:var(--good);background:#34d39926}.btn-primary{width:100%;padding:.75rem;margin-top:1rem;border:none;border-radius:calc(var(--radius) - 4px);background:var(--accent);color:#fff;font-size:.9rem;font-weight:600;cursor:pointer;transition:all .2s}.btn-primary:hover{box-shadow:0 4px 16px #7c6cff59;transform:translateY(-1px)}.btn-primary:active{transform:translateY(0)}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:.75rem}.stat-card{text-align:center;padding:1rem .5rem;background:var(--bg);border:1px solid var(--border);border-radius:calc(var(--radius) - 4px)}.stat-value{font-size:1.5rem;font-weight:700;letter-spacing:-.02em}.stat-value.good{color:var(--good)}.stat-value.ok{color:var(--ok)}.stat-value.bad{color:var(--bad)}.stat-label{font-size:.7rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.08em;margin-top:.2rem}.chart-container{display:flex;align-items:flex-end;gap:.35rem;height:10rem;padding-top:1rem}.chart-bar-wrapper{flex:1;display:flex;flex-direction:column;align-items:center;height:100%;justify-content:flex-end;gap:.35rem}.chart-bar{width:100%;max-width:2.5rem;border-radius:4px 4px 0 0;transition:height .3s ease;min-height:4px;position:relative}.chart-bar:hover{opacity:.85}.chart-bar .tooltip{display:none;position:absolute;bottom:calc(100% + 6px);left:50%;transform:translate(-50%);background:#222;color:#fff;padding:.3rem .5rem;border-radius:6px;font-size:.7rem;white-space:nowrap;z-index:10;pointer-events:none}.chart-bar:hover .tooltip{display:block}.chart-label{font-size:.6rem;color:var(--text-muted);text-align:center;line-height:1.1}.chart-empty{display:flex;align-items:center;justify-content:center;height:100%;color:var(--text-muted);font-size:.85rem}.sleep-entry{display:flex;align-items:center;gap:1rem;padding:1rem;background:var(--bg);border:1px solid var(--border);border-radius:calc(var(--radius) - 4px);margin-bottom:.5rem;transition:border-color .2s}.sleep-entry:hover{border-color:#ffffff26}.entry-date{min-width:4.5rem;text-align:center}.entry-date .day{font-size:1.2rem;font-weight:700}.entry-date .month{font-size:.7rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em}.entry-times{flex:1;display:flex;flex-direction:column;gap:.15rem}.entry-time-row{display:flex;align-items:center;gap:.5rem;font-size:.85rem}.entry-time-row .icon{width:1.2rem;text-align:center}.entry-time-row .label{color:var(--text-muted);font-size:.75rem;min-width:3rem}.entry-duration{font-size:1.1rem;font-weight:700;min-width:4rem;text-align:right}.entry-quality{display:flex;gap:3px;min-width:3.5rem;justify-content:center}.quality-dot{width:8px;height:8px;border-radius:50%;background:var(--border)}.quality-dot.filled.good{background:var(--good)}.quality-dot.filled.ok{background:var(--ok)}.quality-dot.filled.bad{background:var(--bad)}.entry-note{font-size:.75rem;color:var(--text-muted);max-width:8rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.entry-delete{background:none;border:none;color:var(--text-muted);cursor:pointer;padding:.25rem;border-radius:4px;font-size:.9rem;transition:all .2s;opacity:0}.sleep-entry:hover .entry-delete{opacity:1}.entry-delete:hover{color:var(--bad);background:#f871711a}.empty-state{text-align:center;padding:3rem 1rem;color:var(--text-muted)}.empty-state .icon{font-size:2.5rem;margin-bottom:.75rem}.empty-state p{font-size:.9rem}.streak-badge{display:inline-flex;align-items:center;gap:.4rem;padding:.35rem .75rem;background:var(--accent-glow);border:1px solid rgba(124,108,255,.25);border-radius:2rem;font-size:.8rem;font-weight:600;color:var(--accent);margin-top:.5rem}.goal-bar{height:6px;background:var(--border);border-radius:3px;margin-top:.5rem;overflow:hidden}.goal-bar-fill{height:100%;border-radius:3px;transition:width .4s ease}@media(max-width:640px){.app{padding:1.25rem 1rem 3rem}.stats-grid{grid-template-columns:repeat(2,1fr)}.form-grid{grid-template-columns:1fr}.sleep-entry{flex-wrap:wrap;gap:.5rem}.entry-note{max-width:100%;flex-basis:100%;order:5}}