:root {
  --sidebar: #0f172a;
  --sidebar-hover: #1e293b;
  --sidebar-text: #94a3b8;
  --sidebar-active: #f8fafc;
  --accent: #0d9488;
  --accent-soft: #ccfbf1;
  --bg: #f1f5f9;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --up: #059669;
  --down: #dc2626;
  --warn: #d97706;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.06), 0 4px 12px rgba(15, 23, 42, 0.04);
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

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

html, body {
  height: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  display: flex;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; }

/* Sidebar */
.sidebar {
  width: 240px;
  background: var(--sidebar);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  padding: 1.25rem 0.85rem;
  flex-shrink: 0;
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 40;
  transition: transform 0.25s ease;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem 1.5rem;
  color: #fff;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--accent);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 1rem;
}

.brand-name {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 0.85rem;
  border-radius: 8px;
  font-size: 0.925rem;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}

.nav-item:hover {
  background: var(--sidebar-hover);
  color: #e2e8f0;
}

.nav-item.active {
  background: rgba(13, 148, 136, 0.18);
  color: var(--sidebar-active);
}

.nav-icon {
  width: 1.25rem;
  text-align: center;
  opacity: 0.85;
}

/* Shell */
.shell {
  flex: 1;
  margin-left: 240px;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.header {
  height: 64px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 20;
}

.menu-btn {
  display: none;
  font-size: 1.25rem;
  color: var(--text);
  padding: 0.35rem;
}

.search {
  flex: 1;
  max-width: 420px;
}

.search input {
  width: 100%;
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  outline: none;
}

.search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-left: auto;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--bg);
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 0.8rem;
  font-weight: 700;
}

/* Main */
.main {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.page-head h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.page-sub {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 0.2rem;
}

/* KPIs */
.kpis {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.kpi {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.15rem 1.25rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.kpi-label {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 500;
}

.kpi-value {
  font-size: 1.65rem;
  font-weight: 700;
  margin: 0.35rem 0;
  letter-spacing: -0.03em;
}

.kpi-delta {
  font-size: 0.78rem;
  font-weight: 500;
}

.kpi-delta.up { color: var(--up); }
.kpi-delta.down { color: var(--down); }

/* Panels */
.grid-2 {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1rem;
}

.panel {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.15rem 1.25rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

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

.panel-head h2 {
  font-size: 1rem;
  font-weight: 650;
}

.chip {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}

.chip.warn {
  background: #fef3c7;
  color: var(--warn);
}

.link-btn {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
}

.chart-wrap {
  position: relative;
  width: 100%;
}

/* Alerts */
.alerts {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.alert-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  border-radius: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
}

.alert-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--warn);
  flex-shrink: 0;
}

.alert-item.critical .alert-dot {
  background: var(--down);
}

.alert-info {
  flex: 1;
  min-width: 0;
}

.alert-name {
  font-size: 0.875rem;
  font-weight: 600;
}

.alert-meta {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.15rem;
}

.alert-qty {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--warn);
  white-space: nowrap;
}

.alert-item.critical .alert-qty {
  color: var(--down);
}

/* Table */
.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

th {
  text-align: left;
  padding: 0.65rem 0.75rem;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border);
}

td {
  padding: 0.85rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr:hover {
  background: var(--bg);
}

.status {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 650;
}

.status.completed { background: #d1fae5; color: var(--up); }
.status.pending { background: #fef3c7; color: var(--warn); }
.status.processing { background: #e0f2fe; color: #0284c7; }
.status.cancelled { background: #fee2e2; color: var(--down); }

.overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  z-index: 30;
}

/* Responsive */
@media (max-width: 1100px) {
  .kpis { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .shell {
    margin-left: 0;
  }

  .menu-btn {
    display: block;
  }

  .overlay.show {
    display: block;
  }

  .kpis {
    grid-template-columns: 1fr;
  }

  .main {
    padding: 1rem;
  }

  .search {
    max-width: none;
  }
}