:root {
  --bg-primary: #070d18;
  --bg-surface: #0e1726;
  --bg-surface-elevated: #142033;
  --border: rgba(255, 255, 255, 0.1);
  --border-focus: #00e5ff;
  --text-primary: #f0f4f8;
  --text-secondary: #8fa3bf;
  --text-muted: #536b88;
  --accent-cyan: #00e5ff;
  --accent-blue: #2979ff;
  --accent-green: #00e676;
  --accent-amber: #ffab00;
  --accent-red: #ff3d71;
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  padding: 24px;
}

.optimizer-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.optimizer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
  padding-bottom: 20px;
}

.optimizer-title h1 {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 12px;
}

.optimizer-title p {
  color: var(--text-secondary);
  font-size: 13px;
  margin-top: 4px;
}

.optimizer-badges {
  display: flex;
  gap: 10px;
}

.badge {
  font-size: 11px;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-live {
  background: rgba(0, 229, 255, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 229, 255, 0.3);
}

.badge-savings {
  background: rgba(0, 230, 118, 0.12);
  color: var(--accent-green);
  border: 1px solid rgba(0, 230, 118, 0.3);
}

/* KPI Scorecard */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.kpi-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  position: relative;
  overflow: hidden;
}

.kpi-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent-blue);
}

.kpi-card.savings::before {
  background: var(--accent-green);
}

.kpi-card.time::before {
  background: var(--accent-cyan);
}

.kpi-card.efficiency::before {
  background: var(--accent-amber);
}

.kpi-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.kpi-value {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  margin: 6px 0;
}

.kpi-sub {
  font-size: 12px;
  color: var(--text-secondary);
}

/* Controls & Settings */
.controls-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.control-group label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
}

select, input, button {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border);
  color: #fff;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  outline: none;
  transition: all 0.2s ease;
}

select:focus, input:focus {
  border-color: var(--border-focus);
}

.btn-optimize {
  background: linear-gradient(135deg, #00e5ff, #2979ff);
  color: #070d18;
  font-weight: 800;
  border: none;
  cursor: pointer;
  padding: 10px 24px;
  border-radius: 8px;
  margin-top: auto;
}

.btn-optimize:hover {
  filter: brightness(1.15);
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.4);
}

/* Gantt Chart Table */
.schedule-section {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.section-header h3 {
  font-size: 16px;
  font-weight: 700;
}

.schedule-table-wrap {
  overflow-x: auto;
}

.schedule-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

.schedule-table th {
  background: var(--bg-surface-elevated);
  color: var(--text-muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.schedule-table td {
  padding: 12px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.schedule-table tr:hover {
  background: var(--bg-surface-elevated);
}

.vessel-name-cell {
  font-weight: 700;
  color: #fff;
}

.terminal-badge {
  font-size: 10px;
  padding: 2px 6px;
  background: rgba(41, 121, 255, 0.15);
  color: #82b1ff;
  border-radius: 4px;
  font-weight: 600;
}

.tag-cargo {
  font-size: 10px;
  padding: 2px 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
}

.savings-tag {
  color: var(--accent-green);
  font-weight: 700;
}

@media (max-width: 1024px) {
  .kpi-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .kpi-row {
    grid-template-columns: 1fr;
  }
  .optimizer-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}