:root {
  --ink: #0B1424;
  --surface: #131E33;
  --surface-raised: #1B2A47;
  --surface-hover: #223257;
  --line: #263C63;
  --line-soft: #1D2E4D;
  --text: #E8EDF7;
  --text-muted: #8AA0C7;
  --text-dim: #5A6E93;
  --accent: #2DD4BF;
  --accent-dim: rgba(45, 212, 191, 0.16);
  --morning: #F5B841;
  --evening: #FB8A5C;
  --night: #6C7BF5;
  --off: #46557A;
  --error: #F0475E;
  --error-dim: rgba(240, 71, 94, 0.14);
  --warning: #EFC13B;
  --warning-dim: rgba(239, 193, 59, 0.14);
  --radius: 8px;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --sans: 'Space Grotesk', 'Inter', sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--sans);
  background-image:
    linear-gradient(180deg, rgba(255,255,255,0.02) 0%, transparent 6%),
    repeating-linear-gradient(0deg, rgba(255,255,255,0.012) 0px, rgba(255,255,255,0.012) 1px, transparent 1px, transparent 40px);
}

button { font-family: inherit; cursor: pointer; }

/* ---------- Top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 24px;
  background: linear-gradient(180deg, var(--surface) 0%, var(--ink) 100%);
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  font-size: 22px;
  color: var(--accent);
  text-shadow: 0 0 14px rgba(45,212,191,0.5);
}
.brand-text h1 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.brand-sub {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.topbar-center { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }

.view-toggle {
  display: flex;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px;
}
.view-toggle button {
  border: none;
  background: transparent;
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  transition: all .15s ease;
}
.view-toggle button.active {
  background: var(--accent-dim);
  color: var(--accent);
}

.date-nav { display: flex; align-items: center; gap: 8px; }
.icon-btn {
  width: 28px; height: 28px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font-size: 15px;
  line-height: 1;
}
.icon-btn:hover { background: var(--surface-hover); }
.range-label {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--text);
  min-width: 150px;
  text-align: center;
}
.ghost-btn {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-muted);
  padding: 5px 12px;
  border-radius: 6px;
  font-size: 12px;
}
.ghost-btn:hover { color: var(--text); border-color: var(--accent); }

.topbar-actions { display: flex; align-items: center; gap: 16px; }
.clock {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}
.strategy-select {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 8px 10px;
  font-family: inherit;
  font-size: 12px;
  max-width: 280px;
  cursor: pointer;
}
.strategy-select:hover { border-color: var(--accent); }
.primary-btn {
  display: flex; align-items: center; gap: 6px;
  background: var(--accent);
  color: #04231F;
  border: none;
  padding: 9px 16px;
  border-radius: 7px;
  font-weight: 700;
  font-size: 13px;
  box-shadow: 0 0 0 1px rgba(45,212,191,0.3), 0 4px 14px rgba(45,212,191,0.18);
  transition: transform .1s ease;
}
.primary-btn:hover { transform: translateY(-1px); }
.primary-btn:active { transform: translateY(0); }

/* ---------- Main layout ---------- */
.app-main {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 16px;
  padding: 16px 24px;
  align-items: start;
}

.grid-panel { min-width: 0; }

.palette {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  margin-bottom: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  flex-wrap: wrap;
}
.palette-label {
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-right: 4px;
}
.palette-hint {
  margin-left: auto;
  font-size: 11px;
  color: var(--text-dim);
  font-style: italic;
}
.chip {
  font-size: 12px;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: 6px;
  cursor: grab;
  border: 1px solid transparent;
  color: #0B1424;
  display: flex;
  align-items: baseline;
  gap: 5px;
  user-select: none;
}
.chip small { font-family: var(--mono); font-weight: 500; font-size: 9.5px; opacity: 0.75; }
.chip-morning { background: var(--morning); }
.chip-evening { background: var(--evening); }
.chip-night { background: var(--night); color: #EEF0FF; }
.chip-off { background: var(--off); color: #E8EDF7; }
.chip:active { cursor: grabbing; opacity: 0.7; }

.grid-scroll {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  max-height: 62vh;
}

.roster-grid {
  border-collapse: separate;
  border-spacing: 0;
  width: 100%;
}
.roster-grid thead th {
  position: sticky;
  top: 0;
  background: var(--surface-raised);
  z-index: 3;
  padding: 8px 6px;
  font-size: 11px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--line);
  text-align: center;
  min-width: 78px;
}
.roster-grid thead th.emp-col-head {
  position: sticky;
  left: 0;
  top: 0;
  z-index: 4;
  text-align: left;
  padding-left: 14px;
  min-width: 150px;
}
.roster-grid thead th .day-name {
  display: block;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 10px;
}
.roster-grid thead th .day-date {
  display: block;
  font-weight: 700;
  color: var(--text);
  font-size: 13px;
  margin-top: 2px;
}
.roster-grid thead th.today .day-date { color: var(--accent); }

.roster-grid tbody td.emp-col {
  position: sticky;
  left: 0;
  background: var(--surface);
  z-index: 2;
  border-bottom: 1px solid var(--line-soft);
  border-right: 1px solid var(--line);
  padding: 10px 14px;
  min-width: 150px;
}
.emp-name-row { display: flex; align-items: center; gap: 8px; }
.emp-avatar {
  width: 26px; height: 26px;
  border-radius: 7px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
  font-size: 12px;
  color: #0B1424;
  flex-shrink: 0;
}
.emp-name { font-weight: 600; font-size: 13px; }
.emp-note { font-size: 10px; color: var(--text-dim); margin-left: 34px; margin-top: 2px; line-height: 1.3; }

.roster-grid tbody td.cell {
  border-bottom: 1px solid var(--line-soft);
  border-right: 1px solid var(--line-soft);
  padding: 6px;
  text-align: center;
  vertical-align: middle;
  transition: background .12s ease;
}
.roster-grid tbody td.cell.weekend-col { background: rgba(255,255,255,0.012); }
.roster-grid tbody td.cell.dragover { background: var(--surface-hover); }

.shift-pill {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 40px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  color: #0B1424;
  cursor: grab;
  position: relative;
  border: 1px solid transparent;
}
.shift-pill.morning { background: var(--morning); }
.shift-pill.evening { background: var(--evening); }
.shift-pill.night { background: var(--night); color: #EEF0FF; }
.shift-pill.off { background: transparent; color: var(--text-dim); border: 1px dashed var(--line); font-weight: 600; }
.shift-pill .pill-time { font-family: var(--mono); font-size: 8.5px; font-weight: 500; opacity: 0.8; }
.shift-pill.empty { background: var(--error-dim); border: 1px dashed var(--error); color: var(--error); font-size: 10px; }

/* HUD corner brackets — reserved for cells with a live violation */
.shift-pill.flag-error, .shift-pill.flag-warning {
  border-width: 1.5px;
}
.shift-pill.flag-error { border-color: var(--error); }
.shift-pill.flag-warning { border-color: var(--warning); }
.shift-pill.flag-error::before, .shift-pill.flag-error::after,
.shift-pill.flag-warning::before, .shift-pill.flag-warning::after {
  content: "";
  position: absolute;
  width: 7px; height: 7px;
  border-style: solid;
  border-width: 0;
}
.shift-pill.flag-error::before, .shift-pill.flag-warning::before {
  top: -1px; left: -1px; border-top-width: 2px; border-left-width: 2px;
}
.shift-pill.flag-error::after, .shift-pill.flag-warning::after {
  bottom: -1px; right: -1px; border-bottom-width: 2px; border-right-width: 2px;
}
.shift-pill.flag-error::before, .shift-pill.flag-error::after { border-color: var(--error); }
.shift-pill.flag-warning::before, .shift-pill.flag-warning::after { border-color: var(--warning); }

/* ---------- Side panel ---------- */
.side-panel { display: flex; flex-direction: column; gap: 14px; position: sticky; top: 16px; }
.panel-block {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.panel-title {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 12px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--line);
  background: var(--surface-raised);
}
.pt-icon { color: var(--accent); }
.alert-count {
  margin-left: auto;
  background: var(--error);
  color: #200;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  padding: 1px 7px;
  border-radius: 999px;
}
.alert-count.zero { background: var(--line); color: var(--text-dim); }

.alerts-list { max-height: 380px; overflow-y: auto; }
.empty-state { padding: 18px 14px; color: var(--text-dim); font-size: 12px; text-align: center; }
.alert-item {
  padding: 9px 12px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 12px;
  line-height: 1.4;
  cursor: pointer;
  display: flex;
  gap: 8px;
}
.alert-item:hover { background: var(--surface-hover); }
.alert-item .sev-dot { width: 8px; height: 8px; border-radius: 2px; margin-top: 3px; flex-shrink: 0; }
.alert-item.error .sev-dot { background: var(--error); }
.alert-item.warning .sev-dot { background: var(--warning); }
.alert-item .alert-meta { color: var(--text-dim); font-family: var(--mono); font-size: 10px; display: block; margin-top: 2px; }

.legend-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 12px;
  font-size: 11.5px;
  color: var(--text-muted);
}
.dot { display: inline-block; width: 9px; height: 9px; border-radius: 3px; margin-right: 6px; vertical-align: middle; }
.dot-morning { background: var(--morning); }
.dot-evening { background: var(--evening); }
.dot-night { background: var(--night); }
.dot-off { background: var(--off); }
.dot-error { background: var(--error); }
.dot-warning { background: var(--warning); }

/* ---------- Stats panel ---------- */
.stats-panel {
  margin: 0 24px 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.stats-scroll { overflow-x: auto; }
.stats-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.stats-table th, .stats-table td {
  padding: 8px 12px;
  text-align: center;
  border-bottom: 1px solid var(--line-soft);
  white-space: nowrap;
}
.stats-table thead th {
  background: var(--surface-raised);
  color: var(--text-muted);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  position: sticky; top: 0;
}
.stats-table td.emp-cell { text-align: left; font-weight: 600; }
.stats-table td.metric-morning { color: var(--morning); font-family: var(--mono); }
.stats-table td.metric-evening { color: var(--evening); font-family: var(--mono); }
.stats-table td.metric-night { color: var(--night); font-family: var(--mono); }
.stats-table td.metric-off { color: var(--text-muted); font-family: var(--mono); }
.stats-table tr.week-divider td { border-top: 1px solid var(--line); }

@media (max-width: 980px) {
  .app-main { grid-template-columns: 1fr; }
  .side-panel { position: static; }
}