:root{
  --rail: #0052CC;
  --sidebar: #F4F5F7;
  --bg: #FFFFFF;
  --border: rgba(9, 30, 66, 0.13);
  --text: #172B4D;
  --muted: #6B778C;

  --card: #FFFFFF;
  --shadow: 0 1px 2px rgba(9,30,66,0.15);
  --shadow2: 0 8px 24px rgba(9,30,66,0.15);

  --todo-col: #F4F5F7;
  --done-col: #F4F5F7;
  --doing-col: #FFFAE6;

  --radius: 8px;
  --radius2: 10px;
}

*{ box-sizing: border-box; }
html,body{ height: 100%; }
body{
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial;
  color: var(--text);
  background: #EEEFF2;
}

/* APP LAYOUT */
.app{
  height: 100%;
  display: grid;
  grid-template-columns: 64px 260px 1fr;
}

/* LEFT RAIL */
.rail{
  background: var(--rail);
  display:flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 10px 0;
}
.rail-top, .rail-bottom{
  display:flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.rail-btn{
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 12px;
  background: rgba(255,255,255,0.08);
  color: #fff;
  cursor: pointer;
}
.rail-btn:hover{ background: rgba(255,255,255,0.14); }
.rail-ic{ font-size: 18px; font-weight: 700; }

.rail-avatar{
  width: 44px;
  height: 44px;
  border: 2px solid rgba(255,255,255,0.25);
  border-radius: 999px;
  background: rgba(0,0,0,0.12);
  color: #fff;
  font-weight: 800;
  cursor: pointer;
}

/* SIDEBAR */
.sidebar{
  background: var(--sidebar);
  border-right: 1px solid var(--border);
  padding: 14px 14px;
}

.project{
  display:flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  border-radius: var(--radius);
}
.project-badge{
  width: 40px;
  height: 40px;
  display:grid;
  place-items:center;
  background: #E9ECF2;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 18px;
}
.project-name{ font-weight: 700; }
.project-sub{ color: var(--muted); font-size: 12px; margin-top: 2px; }

.nav{ margin-top: 8px; display:flex; flex-direction: column; gap: 4px; }
.nav-item{
  width: 100%;
  border: none;
  background: transparent;
  display:flex;
  align-items:center;
  gap: 10px;
  padding: 10px;
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--text);
}
.nav-item:hover{ background: rgba(9,30,66,0.06); }
.nav-item.active{
  background: rgba(9,30,66,0.08);
  color: #0052CC;
  font-weight: 700;
}
.nav-ic{ width: 20px; text-align:center; color: #42526E; }
.nav-item.active .nav-ic{ color: #0052CC; }
.nav-sep{
  height: 1px;
  background: rgba(9,30,66,0.10);
  margin: 10px 0;
}

/* MAIN */
.main{
  background: var(--bg);
  padding: 22px 22px 18px;
  overflow: hidden;
}

.main-head{
  padding-bottom: 12px;
}

.title-row{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 12px;
}
h1{ margin: 0; font-size: 28px; font-weight: 600; }

.head-actions{ display:flex; gap: 10px; align-items:center; }

.primary, .ghost{
  border-radius: 8px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  cursor: pointer;
  font-weight: 600;
}
.primary{
  background: #0052CC;
  border-color: #0052CC;
  color: #fff;
}
.primary:hover{ filter: brightness(0.97); }
.ghost{
  background: transparent;
  color: #344563;
}
.ghost:hover{ background: rgba(9,30,66,0.06); }

.filters-row{
  margin-top: 14px;
  display:flex;
  align-items:center;
  gap: 14px;
}

.search{
  display:flex;
  align-items:center;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  min-width: 320px;
  background: #F4F5F7;
}
.search-ic{ color: #42526E; }
.search input{
  border: none;
  outline: none;
  background: transparent;
  width: 100%;
  font-size: 14px;
}

.people{
  display:flex;
  align-items:center;
  gap: 6px;
}
.avatar{
  width: 30px;
  height: 30px;
  border-radius: 999px;
  display:grid;
  place-items:center;
  font-size: 12px;
  font-weight: 800;
  color: #fff;
}
.avatar.a1{ background: #6554C0; }
.avatar.a2{ background: #2684FF; }
.avatar.a3{ background: #FF5630; }
.avatar.a4{ background: #36B37E; }
.avatar.add{
  background: #DFE1E6;
  color: #253858;
  border: 1px solid var(--border);
  font-weight: 900;
}

.label-filter{
  display:flex;
  align-items:center;
  gap: 10px;
  color: #42526E;
  font-size: 14px;
}
.label-filter select{
  padding: 10px 10px;
  border: 1px solid var(--border);
  background: #F4F5F7;
  border-radius: 8px;
  outline: none;
  cursor: pointer;
}

.hint{
  margin-top: 10px;
  color: #42526E;
  font-size: 12px;
  padding: 8px 10px;
  border: 1px dashed rgba(9,30,66,0.22);
  border-radius: 8px;
  background: rgba(9,30,66,0.03);
}

/* BOARD */
.board{
  position: relative;
  margin-top: 12px;
  display:flex;
  gap: 16px;
  overflow-x: auto;
  padding-bottom: 10px;
}

.col{
  width: 320px;
  flex: 0 0 320px;
  border-radius: 6px;
  background: var(--todo-col);
  padding: 10px;
  max-height: calc(100vh - 210px);
  display:flex;
  flex-direction: column;
}
.col.inprogress{ background: var(--doing-col); }
.col-head{
  display:flex;
  align-items:center;
  justify-content: space-between;
  padding: 6px 6px 10px;
}
.col-title{ display:flex; align-items:center; gap: 10px; }
.col-name{
  font-size: 12px;
  letter-spacing: 0.06em;
  color: #42526E;
  font-weight: 800;
}
.col-count{
  font-size: 12px;
  color: #42526E;
}
.wip{
  font-size: 11px;
  font-weight: 800;
  padding: 4px 8px;
  border-radius: 6px;
  background: #FFAB00;
  color: #172B4D;
}
.wip.breach{
  background: #FF5630;
  color: #fff;
}

.list{
  list-style: none;
  margin: 0;
  padding: 0 4px 0;
  display:flex;
  flex-direction: column;
  gap: 10px;
  overflow-y: auto;
  min-height: 120px;
}

.list:empty::before{
  content: "Drop tasks here";
  display:block;
  text-align:center;
  color: #6B778C;
  font-size: 12px;
  padding: 14px 8px;
  border: 1px dashed rgba(9,30,66,0.18);
  border-radius: 6px;
  margin-top: 6px;
}

.col-add{
  margin-top: 10px;
  border: none;
  background: rgba(9,30,66,0.06);
  color: #42526E;
  padding: 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 16px;
}
.col-add:hover{ background: rgba(9,30,66,0.10); }

/* CARD */
.card{
  background: var(--card);
  border-radius: 6px;
  box-shadow: var(--shadow);
  padding: 12px;
  border: 1px solid rgba(9,30,66,0.10);
  cursor: grab;
  user-select: none;
}
.card:active{ cursor: grabbing; }
.card.dragging{
  opacity: 0.65;
  transform: rotate(0.3deg);
}

.card-top{
  display:flex;
  align-items:flex-start;
  justify-content: space-between;
  gap: 10px;
}
.card-title{
  margin: 0;
  font-size: 14px;
  line-height: 1.35;
  font-weight: 600;
  color: #172B4D;
}
.card-desc{
  margin: 8px 0 0;
  font-size: 12px;
  color: #5E6C84;
  line-height: 1.35;
  white-space: pre-wrap;
}

.card-actions{
  display:flex;
  gap: 6px;
}
.icon{
  border: 1px solid rgba(9,30,66,0.12);
  background: #F4F5F7;
  border-radius: 6px;
  padding: 6px 8px;
  cursor: pointer;
  color: #344563;
}
.icon:hover{ background: #EBECF0; }

.card-bottom{
  margin-top: 12px;
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 10px;
}
.key{
  font-size: 12px;
  color: #5E6C84;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.meta-right{
  display:flex;
  align-items:center;
  gap: 8px;
}
.dot{
  width: 12px;
  height: 12px;
  border-radius: 999px;
}
.dot.low{ background: #36B37E; }
.dot.medium{ background: #FFAB00; }
.dot.high{ background: #FF5630; }

.assignee{
  width: 26px;
  height: 26px;
  border-radius: 999px;
  display:grid;
  place-items:center;
  font-size: 12px;
  font-weight: 800;
  color: #fff;
  background: #2684FF;
}
.assignee.alt1{ background:#6554C0; }
.assignee.alt2{ background:#FF5630; }
.assignee.alt3{ background:#36B37E; }

/* FLOATING + */
.floating-plus{
  position: sticky;
  left: 100%;
  align-self: flex-start;
  margin-top: 6px;
  margin-left: 6px;

  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  background: #F4F5F7;
  border-radius: 8px;
  cursor: pointer;
  font-size: 20px;
  color: #42526E;
}
.floating-plus:hover{ background: #EBECF0; }

/* MODAL */
.backdrop{
  position: fixed;
  inset: 0;
  background: rgba(9,30,66,0.45);
}

.modal{
  border: none;
  padding: 0;
  background: transparent;
}
.modal::backdrop{ background: transparent; }

.modal-card{
  width: min(560px, calc(100vw - 24px));
  background: #fff;
  border-radius: 10px;
  box-shadow: var(--shadow2);
  border: 1px solid rgba(9,30,66,0.14);
  padding: 14px;
}

.modal-head{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(9,30,66,0.10);
}
.modal-head h2{
  margin: 0;
  font-size: 16px;
  font-weight: 800;
  color: #172B4D;
}

.field{
  display:flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 12px;
}
.field span{
  font-size: 12px;
  font-weight: 700;
  color: #5E6C84;
}

input, textarea, select{
  padding: 10px 10px;
  border: 1px solid rgba(9,30,66,0.18);
  border-radius: 8px;
  outline: none;
  font-size: 14px;
  background: #FAFBFC;
  color: #172B4D;
}
textarea{ resize: vertical; }

.grid2{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.modal-actions{
  display:flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 14px;
}

@media (max-width: 980px){
  .app{ grid-template-columns: 64px 1fr; }
  .sidebar{ display:none; }
  .search{ min-width: 220px; }
  .grid2{ grid-template-columns: 1fr; }
}