:root {
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-display: 'Barlow Condensed', 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --color-bg: #f4f5fb;
  --color-surface: #ffffff;
  --color-border: #e6e8f0;
  --color-primary: #5b5bef;
  --color-primary-dark: #4747d1;
  --color-text: #1f2430;
  --color-muted: #767c8c;

  --high: #e5484d;
  --medium: #f2a007;
  --low: #4c9f70;
  --todo: #6b7280;
  --progress: #3b82f6;
  --done: #4c9f70;
  --overdue: #e5484d;

  --radius: 14px;
  --shadow: 0 1px 3px rgba(24, 28, 45, 0.06), 0 6px 18px rgba(24, 28, 45, 0.05);
}

* { box-sizing: border-box; }
[v-cloak] { display: none; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}

/* ---------- Header ---------- */
.app-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 20;
}
.header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 1rem 1.25rem 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 0.85rem; }
.brand-icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary), #8a5bef);
  color: #fff; display: grid; place-items: center; font-size: 1.35rem;
}
.brand h1 { font-family: var(--font-display); font-size: 1.65rem; margin: 0; letter-spacing: .3px; }
.brand-sub { margin: 0; color: var(--color-muted); font-size: .82rem; }

.tabs {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.25rem;
  display: flex;
  gap: .25rem;
  overflow-x: auto;
}
.tab {
  border: none; background: none; cursor: pointer;
  font-family: var(--font-sans); font-weight: 600; font-size: .9rem;
  color: var(--color-muted); padding: .7rem .9rem;
  border-bottom: 2.5px solid transparent; white-space: nowrap;
  display: flex; align-items: center; gap: .4rem;
}
.tab:hover { color: var(--color-text); }
.tab-active { color: var(--color-primary); border-bottom-color: var(--color-primary); }

.page { max-width: 1080px; margin: 0 auto; padding: 1.5rem 1.25rem 4rem; }

/* ---------- Buttons ---------- */
.btn-primary, .btn-ghost, .btn-danger {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--font-sans); font-weight: 600; font-size: .88rem;
  padding: .6rem 1.05rem; border-radius: 10px; cursor: pointer; border: 1px solid transparent;
  transition: background .15s, transform .05s;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-primary:disabled { opacity: .6; cursor: default; }
.btn-ghost { background: transparent; color: var(--color-muted); border-color: var(--color-border); }
.btn-ghost:hover { background: #f0f1f7; }
.btn-danger { background: var(--high); color: #fff; }
.btn-danger:hover { background: #cf3b40; }
.btn-primary:active, .btn-danger:active { transform: translateY(1px); }
.link-btn { background: none; border: none; color: var(--color-primary); font-weight: 600; cursor: pointer; font-size: .85rem; }
.link-btn:hover { text-decoration: underline; }

/* ---------- KPI cards ---------- */
.kpi-grid {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(1, 1fr);
  margin-bottom: 1.75rem;
}
@media (min-width: 560px) { .kpi-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .kpi-grid { grid-template-columns: repeat(4, 1fr); } }
.kpi-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 1.1rem 1.2rem; display: flex; align-items: center; gap: .9rem;
}
.kpi-icon { width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; font-size: 1.25rem; color: #fff; flex-shrink: 0; }
.kpi-today .kpi-icon { background: var(--color-primary); }
.kpi-overdue .kpi-icon { background: var(--overdue); }
.kpi-progress .kpi-icon { background: var(--progress); }
.kpi-done .kpi-icon { background: var(--done); }
.kpi-value { font-family: var(--font-display); font-size: 2rem; line-height: 1; font-weight: 700; }
.kpi-label { color: var(--color-muted); font-size: .8rem; margin-top: .25rem; }

/* ---------- Section heads ---------- */
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin: 0 0 1rem; flex-wrap: wrap; }
.section-head h2 { font-family: var(--font-display); font-size: 1.35rem; margin: 0; display: flex; align-items: center; gap: .5rem; }
.section-head h2 i { color: var(--color-primary); font-size: 1.1rem; }
.muted { color: var(--color-muted); font-size: .82rem; }

/* ---------- Task list ---------- */
.task-list { display: flex; flex-direction: column; gap: .75rem; }
.task-item {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 1rem 1.1rem; display: flex; align-items: flex-start; gap: .85rem;
}
.task-item.is-overdue { border-left: 4px solid var(--overdue); }
.check-btn { background: none; border: none; cursor: pointer; color: var(--color-muted); font-size: 1.35rem; padding: 0; margin-top: 1px; transition: color .15s; }
.check-btn:hover { color: var(--done); }
.task-main { flex: 1; min-width: 0; }
.task-title-row { display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; }
.task-title { font-weight: 600; font-size: 1rem; }
.task-meta { display: flex; align-items: center; gap: .5rem; margin-top: .5rem; flex-wrap: wrap; }
.task-notes { margin: .55rem 0 0; color: var(--color-muted); font-size: .85rem; }
.task-actions { display: flex; gap: .25rem; }
.icon-btn { background: none; border: none; cursor: pointer; color: var(--color-muted); width: 32px; height: 32px; border-radius: 8px; }
.icon-btn:hover { background: #f0f1f7; color: var(--color-text); }
.icon-danger:hover { background: #fdecec; color: var(--high); }

.cat-tag, .due-tag { display: inline-flex; align-items: center; gap: .3rem; font-size: .78rem; color: var(--color-muted); font-family: var(--font-mono); }
.chip-overdue { display: inline-flex; align-items: center; gap: .3rem; font-size: .72rem; font-weight: 600; color: var(--overdue); background: #fdecec; padding: .12rem .5rem; border-radius: 999px; }

/* ---------- Badges ---------- */
.badge { display: inline-block; font-size: .72rem; font-weight: 600; padding: .18rem .55rem; border-radius: 999px; }
.badge-priority-high { background: #fdecec; color: var(--high); }
.badge-priority-medium { background: #fef3e0; color: #b9740a; }
.badge-priority-low { background: #e9f5ef; color: var(--low); }
.badge-status-todo { background: #eef0f4; color: var(--todo); }
.badge-status-progress { background: #e8f0fe; color: var(--progress); }
.badge-status-done { background: #e9f5ef; color: var(--done); }

/* ---------- Filters ---------- */
.filter-bar { display: flex; gap: .9rem; flex-wrap: wrap; align-items: flex-end; margin-bottom: 1.1rem; }
.fld { display: flex; flex-direction: column; gap: .3rem; font-size: .78rem; color: var(--color-muted); font-weight: 600; }
.fld select { min-width: 130px; }
.fld select, .fld-full input, .fld-full select, .fld-full textarea {
  font-family: var(--font-sans); font-size: .9rem; color: var(--color-text);
  padding: .5rem .6rem; border: 1px solid var(--color-border); border-radius: 9px; background: var(--color-surface);
}
.fld select:focus, .fld-full input:focus, .fld-full select:focus, .fld-full textarea:focus {
  outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(91,91,239,.12);
}
.clear-btn { padding: .5rem .4rem; }

/* ---------- Table ---------- */
.table-wrap { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); box-shadow: var(--shadow); padding: .5rem; overflow-x: auto; }
.gridjs-flexday .gridjs-table { font-family: var(--font-sans); }
.gridjs-flexday th.gridjs-th { background: #fafbff; font-weight: 600; }
.tbl-actions { display: inline-flex; gap: .25rem; }

/* ---------- Charts ---------- */
.chart-grid { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 800px) { .chart-grid { grid-template-columns: 1fr 1fr; } }
.panel { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.1rem 1.2rem; }
.panel h3 { font-family: var(--font-display); font-size: 1.1rem; margin: 0 0 .5rem; display: flex; align-items: center; gap: .5rem; }
.panel h3 i { color: var(--color-primary); }
.chart-box { width: 100%; height: 300px; }

/* ---------- States ---------- */
.state-block { text-align: center; padding: 2rem 1rem; color: var(--color-muted); font-size: .92rem; }
.state-block i { margin-right: .4rem; }
.state-error { color: var(--high); }
.state-empty { display: flex; flex-direction: column; align-items: center; gap: .5rem; }
.state-empty i { font-size: 1.8rem; color: var(--color-primary); }
.state-empty p { margin: 0; }

/* ---------- Modal ---------- */
.modal-overlay { position: fixed; inset: 0; background: rgba(20,24,40,.45); display: flex; align-items: center; justify-content: center; padding: 1rem; z-index: 50; }
.modal { background: var(--color-surface); border-radius: 16px; width: 100%; max-width: 520px; box-shadow: 0 20px 60px rgba(0,0,0,.25); overflow: hidden; }
.modal-sm { max-width: 400px; }
.modal-head { display: flex; align-items: center; justify-content: space-between; padding: 1.1rem 1.3rem; border-bottom: 1px solid var(--color-border); }
.modal-head h3 { font-family: var(--font-display); font-size: 1.3rem; margin: 0; display: flex; align-items: center; gap: .5rem; }
.modal-head h3 i { color: var(--color-primary); }
.modal-body { padding: 1.2rem 1.3rem; display: flex; flex-direction: column; gap: 1rem; }
.modal-foot { padding: 1rem 1.3rem; border-top: 1px solid var(--color-border); display: flex; justify-content: flex-end; gap: .6rem; }
.fld-full { display: flex; flex-direction: column; gap: .35rem; font-size: .8rem; color: var(--color-muted); font-weight: 600; }
.fld-full em { color: var(--high); font-style: normal; }
.fld-row { display: grid; grid-template-columns: 1fr 1fr; gap: .9rem; }
@media (max-width: 480px) { .fld-row { grid-template-columns: 1fr; } }
.form-error { color: var(--high); font-size: .82rem; margin: 0; display: flex; align-items: center; gap: .4rem; }
.confirm-text { margin: 0; font-size: .95rem; line-height: 1.5; }

/* ---------- Toast ---------- */
.toast {
  position: fixed; bottom: 1.5rem; left: 50%; transform: translateX(-50%);
  background: #1f2430; color: #fff; padding: .7rem 1.1rem; border-radius: 10px;
  font-size: .88rem; font-weight: 500; box-shadow: 0 8px 24px rgba(0,0,0,.25); z-index: 60;
  display: flex; align-items: center; gap: .5rem;
}
.toast i { color: #7dd4a5; }