:root {
  --ink: #14212b;
  --ink-soft: #3a4a57;
  --muted: #6b7c89;
  --line: rgba(20, 33, 43, 0.12);
  --surface: rgba(255, 255, 255, 0.78);
  --surface-solid: #f7f4ef;
  --panel: #fffdf9;
  --accent: #0f766e;
  --accent-deep: #0b4f4a;
  --accent-soft: rgba(15, 118, 110, 0.12);
  --warn: #b45309;
  --danger: #b91c1c;
  --ok: #15803d;
  --shadow: 0 18px 40px rgba(20, 33, 43, 0.08);
  --radius: 18px;
  --font-ui: "Outfit", system-ui, sans-serif;
  --font-display: "Source Serif 4", Georgia, serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-ui);
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(15, 118, 110, 0.16), transparent 55%),
    radial-gradient(900px 420px at 90% 0%, rgba(180, 83, 9, 0.1), transparent 50%),
    linear-gradient(180deg, #e8eef2 0%, #f4efe6 48%, #efe8dc 100%);
}

.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(20, 33, 43, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 33, 43, 0.035) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 90%);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.5rem;
  backdrop-filter: blur(12px);
  background: rgba(247, 244, 239, 0.82);
  border-bottom: 1px solid var(--line);
}

.brand-mark {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.7rem;
  letter-spacing: -0.03em;
  line-height: 1;
}

.brand-sub {
  margin: 0.15rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.top-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: end;
}

.field-inline {
  display: grid;
  gap: 0.25rem;
  font-size: 0.75rem;
  color: var(--muted);
}

.field-inline select,
.table-tools select,
.table-tools input {
  font: inherit;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  padding: 0.55rem 0.7rem;
  color: var(--ink);
  min-width: 10rem;
}

.btn {
  border: 0;
  border-radius: 999px;
  padding: 0.65rem 1.1rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, opacity 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:disabled {
  opacity: 0.55;
  cursor: wait;
  transform: none;
}

.btn.primary {
  background: var(--accent);
  color: #fff;
}

.btn.primary:hover {
  background: var(--accent-deep);
}

.btn.ghost {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
  color: var(--ink);
}

.btn.sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}

.layout {
  width: min(1200px, calc(100% - 2rem));
  margin: 1.25rem auto 3rem;
  display: grid;
  gap: 1rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem 1.15rem;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.panel h2,
.tab-panel h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

#payloadEditor {
  width: 100%;
  min-height: 220px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.45;
  background: #f3f7f8;
  color: var(--ink);
}

.payload-panel.collapsed #payloadEditor,
.payload-panel.collapsed .hint {
  display: none;
}

.hint {
  margin: 0.6rem 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.status-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
}

.eyebrow {
  margin: 0 0 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.7rem;
  color: var(--muted);
}

.badge {
  display: inline-flex;
  margin: 0;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.9rem;
  background: var(--accent-soft);
  color: var(--accent-deep);
}

.badge.feasible {
  background: rgba(21, 128, 61, 0.12);
  color: var(--ok);
}

.badge.best_effort {
  background: rgba(180, 83, 9, 0.14);
  color: var(--warn);
}

.badge.infeasible {
  background: rgba(185, 28, 28, 0.12);
  color: var(--danger);
}

.meta-title {
  margin: 0;
  font-weight: 700;
  font-size: 1.05rem;
}

.meta-line,
.error-line {
  margin: 0.25rem 0 0;
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.error-line {
  color: var(--danger);
}

.meta-block.right {
  text-align: right;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.9rem;
}

.chip {
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  background: rgba(20, 33, 43, 0.06);
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.75rem;
}

.kpi {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 0.9rem 1rem;
  box-shadow: var(--shadow);
}

.kpi .label {
  margin: 0;
  color: var(--muted);
  font-size: 0.75rem;
}

.kpi .value {
  margin: 0.35rem 0 0;
  font-family: var(--font-display);
  font-size: 1.7rem;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.kpi .unit {
  display: inline-block;
  margin-left: 0.35rem;
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0;
  vertical-align: middle;
}

.kpi .note {
  margin: 0.4rem 0 0;
  color: var(--ink-soft);
  font-size: 0.75rem;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.75rem;
}

.tab {
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-weight: 600;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  cursor: pointer;
}

.tab.active {
  background: var(--accent-soft);
  color: var(--accent-deep);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 14px;
  max-height: 520px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

th,
td {
  padding: 0.55rem 0.7rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  white-space: nowrap;
}

th {
  position: sticky;
  top: 0;
  background: #eef4f4;
  color: var(--ink-soft);
  font-weight: 600;
  z-index: 1;
}

tr:hover td {
  background: rgba(15, 118, 110, 0.04);
}

.soc {
  font-family: var(--font-mono);
  font-weight: 500;
}

.soc.low {
  color: var(--danger);
}

.soc.mid {
  color: var(--warn);
}

.soc.high {
  color: var(--ok);
}

.table-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 0.85rem 0;
  align-items: center;
}

.stack {
  display: grid;
  gap: 0.85rem;
}

.card-soft {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.85rem;
  background: rgba(255, 255, 255, 0.65);
}

.card-soft h4 {
  margin: 0 0 0.45rem;
  font-size: 0.95rem;
}

.muted {
  color: var(--muted);
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.day-tag {
  display: inline-block;
  margin-left: 0.35rem;
  padding: 0.05rem 0.3rem;
  border-radius: 0.35rem;
  background: rgba(120, 120, 160, 0.18);
  color: var(--muted);
  font-family: var(--font-sans, inherit);
  font-size: 0.68rem;
  font-weight: 600;
  white-space: nowrap;
}

.day-tag.double-gun {
  background: rgba(40, 120, 90, 0.16);
  color: #1f6b4a;
  margin-left: 0;
}

.history-panel {
  margin-bottom: 0.75rem;
}

.history-list {
  display: grid;
  gap: 0.45rem;
  max-height: 240px;
  overflow: auto;
}

.history-item {
  display: grid;
  grid-template-columns: 9.5rem 1fr auto auto auto;
  gap: 0.65rem;
  align-items: center;
  width: 100%;
  text-align: left;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.55rem 0.7rem;
  background: rgba(255, 255, 255, 0.7);
  font: inherit;
  cursor: pointer;
}

.history-item:hover {
  border-color: rgba(15, 118, 110, 0.45);
  background: rgba(15, 118, 110, 0.06);
}

.history-item .badge {
  font-size: 0.7rem;
  padding: 0.15rem 0.45rem;
}

@media (max-width: 760px) {
  .history-item {
    grid-template-columns: 1fr 1fr;
  }
}

.view-toggle {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.7);
}

.view-btn {
  border: 0;
  background: transparent;
  padding: 0.4rem 0.85rem;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--muted);
  cursor: pointer;
}

.view-btn.active {
  background: var(--accent);
  color: #fff;
}

.view-btn:not(.active):hover {
  background: rgba(15, 118, 110, 0.08);
  color: var(--ink);
}

.gantt {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.7);
  overflow: auto;
  max-height: min(70vh, 720px);
}

.gantt-axis-row,
.gantt-row {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  min-width: 720px;
}

.gantt-axis-row {
  position: sticky;
  top: 0;
  z-index: 2;
  background: #f3efe7;
  border-bottom: 1px solid var(--line);
}

.gantt-label {
  padding: 0.45rem 0.55rem;
  border-right: 1px solid var(--line);
  font-size: 0.78rem;
  display: flex;
  align-items: center;
  background: inherit;
  position: sticky;
  left: 0;
  z-index: 1;
}

.gantt-axis,
.gantt-track {
  position: relative;
  height: 2.2rem;
}

.gantt-axis {
  height: 1.8rem;
}

.gantt-tick {
  position: absolute;
  top: 0;
  bottom: 0;
  border-left: 1px dashed rgba(20, 33, 43, 0.12);
  transform: translateX(-0.5px);
}

.gantt-tick span {
  position: absolute;
  top: 0.25rem;
  left: 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--muted);
  white-space: nowrap;
}

.gantt-row {
  border-bottom: 1px solid rgba(20, 33, 43, 0.06);
  background: rgba(255, 255, 255, 0.45);
}

.gantt-row:nth-child(even) {
  background: rgba(243, 239, 231, 0.55);
}

.gantt-row:hover {
  background: rgba(15, 118, 110, 0.06);
}

.gantt-track {
  height: 2.4rem;
}

.gantt-bar {
  position: absolute;
  top: 0.4rem;
  height: 1.55rem;
  border-radius: 5px;
  font-size: 0.62rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.95);
  padding: 0.2rem 0.3rem;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  cursor: default;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.08);
  transition: transform 0.12s ease, filter 0.12s ease;
}

.gantt-bar:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
  z-index: 3;
}

.gantt-active {
  background: linear-gradient(180deg, #1f8f86, #0f766e);
}

.gantt-deadhead {
  background: linear-gradient(180deg, #8b7355, #6b5740);
}

.gantt-charge {
  background: linear-gradient(180deg, #d97706, #b45309);
}

.gantt-mandatory {
  background: linear-gradient(180deg, #dc2626, #b91c1c);
}

.gantt-final {
  background: linear-gradient(180deg, #7c3aed, #5b21b6);
}

.gantt-overnight {
  background: linear-gradient(180deg, #1e3a5f, #0f2744);
}

.gantt-swatch {
  display: inline-block;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 3px;
  margin: 0 0.2rem 0 0.55rem;
  vertical-align: -0.1rem;
}

.bus-bars {
  display: grid;
  gap: 0.45rem;
}

.bus-bar-row {
  display: grid;
  grid-template-columns: 3.5rem 1fr 3rem;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.8rem;
}

.bar-track {
  height: 10px;
  border-radius: 999px;
  background: rgba(20, 33, 43, 0.08);
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #0f766e, #2a9d8f);
}

.empty {
  text-align: center;
  padding: 3.5rem 1rem;
  color: var(--ink-soft);
}

.empty h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
}

.footer {
  width: min(1200px, calc(100% - 2rem));
  margin: 0 auto 2rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.8rem;
}

.footer a {
  color: var(--accent-deep);
}

@media (max-width: 760px) {
  .topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .status-row {
    grid-template-columns: 1fr;
  }

  .meta-block.right {
    text-align: left;
  }
}