/* Basic layout */
:root{--accent:#2b7cff;--muted:#f4f6f8}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,"Helvetica Neue",Arial;margin:0;background:#f7f9fb;color:#222}
.container{display:grid;grid-template-columns:1fr;gap:16px;padding:18px}
header{grid-column:1/-1}
h1{margin:0 0 8px 0}
.tabs{display:flex;gap:8px;margin-bottom:12px}
.tab{padding:8px 12px;border-radius:6px;border:1px solid #ddd;background:white;cursor:pointer}
.tab.active{background:var(--accent);color:#fff}
main{background:#fff;padding:12px;border-radius:8px;min-height:480px}
aside{background:#fff;padding:12px;border-radius:8px;min-height:480px}
.create-form{display:flex;gap:8px;margin-bottom:12px}
.create-form input{padding:8px;border:1px solid #ccc;border-radius:6px;flex:1}
.create-form button{padding:8px 12px;border:none;background:var(--accent);color:white;border-radius:6px;cursor:pointer}
.task-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
.task-item{padding:10px;border:1px solid #e2e8f0;border-radius:6px;display:flex;justify-content:space-between;align-items:center}
.task-item .meta{font-size:12px;color:#666}
.actions button{margin-left:6px}

/* modal */
.modal{position:fixed;left:0;top:0;right:0;bottom:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,0.5);z-index:999}
.modal-inner{background:#fff;padding:16px;border-radius:8px;width:360px}
.hidden{display:none}

/* timeline area */
.timeline-area{min-height:200px;border:1px dashed #ddd;padding:10px;border-radius:6px;background:#fafafa;overflow:auto}

/* graphs */
.graphs-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.graph-box{background:#fff;padding:8px;border-radius:6px;border:1px solid #eee;min-height:260px}
.canvas-wrap{width:100%;height:220px}