:root {
  color-scheme: dark;
  --bg: #060816;
  --surface: #0f1528;
  --surface-2: #121b32;
  --border: rgba(255,255,255,0.1);
  --text: #f5f7fb;
  --muted: #92a0bc;
  --accent: #69c9ff;
  --accent-strong: #5aa8e5;
  --ok: #3bc88b;
  --danger: #ff7b7b;
}

html[data-theme='light'] {
  color-scheme: light;
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-2: #f4f7fc;
  --border: rgba(15, 23, 42, 0.08);
  --text: #111827;
  --muted: #5f6b7a;
  --accent: #1677b8;
  --accent-strong: #0f5b90;
  --ok: #23996d;
  --danger: #b95353;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

button, input, select {
  font: inherit;
}

.app-shell {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: linear-gradient(180deg, rgba(105,201,255,0.16), rgba(255,255,255,0.03));
  border-right: 1px solid var(--border);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: #06101d;
  font-weight: 800;
}

.brand-block h1, .brand-block p {
  margin: 0;
}

.side-nav {
  display: grid;
  gap: 0.5rem;
}

.nav-link {
  text-align: left;
  padding: 0.8rem 0.9rem;
  border-radius: 14px;
  background: transparent;
  color: var(--text);
  border: 1px solid transparent;
}

.nav-link.active {
  background: rgba(105, 201, 255, 0.14);
  color: var(--accent);
  border-color: var(--border);
}

.sidebar-card {
  margin-top: auto;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface);
}

.sidebar-label, .eyebrow {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.76rem;
}

.main-panel {
  padding: 1.25rem;
}

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

.topbar h2 {
  margin: 0.25rem 0 0;
}

.topbar-actions {
  display: flex;
  gap: 0.7rem;
}

.btn {
  border-radius: 999px;
  padding: 0.8rem 1rem;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #06101d;
  font-weight: 700;
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
}

.view { display: none; }
.view.active { display: block; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.stat-card, .panel-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 1rem;
  box-shadow: 0 18px 40px rgba(0,0,0,0.12);
}

.stat-card p, .panel-header span, .message, .table-wrap, .inventory-item p, .customer-card p {
  color: var(--muted);
}

.stat-card strong {
  display: block;
  margin-top: 0.35rem;
  font-size: 1.28rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.8rem;
}

.panel-header h3 { margin: 0; }
.panel-copy { color: var(--muted); margin: 0 0 0.9rem; }
.composer-card {
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 0.9rem;
  background: var(--surface-2);
  margin-bottom: 0.9rem;
}
.composer-card.hidden { display: none; }
.form-grid.compact { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.btn:active { transform: scale(0.98); }
.btn:hover { transform: translateY(-1px); }

canvas {
  width: 100%;
  height: 220px;
}

.list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.7rem;
}

.list li {
  display: flex;
  justify-content: space-between;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--border);
}

.table-wrap table {
  width: 100%;
  border-collapse: collapse;
}

.table-wrap th, .table-wrap td {
  text-align: left;
  padding: 0.7rem 0.45rem;
  border-bottom: 1px solid var(--border);
}

.toolbar {
  display: flex;
  gap: 0.7rem;
  margin-bottom: 0.8rem;
}

.toolbar input, .toolbar select, .form-grid select, .form-grid input {
  width: 100%;
  padding: 0.8rem 0.9rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
  align-items: end;
}

.form-grid label {
  display: grid;
  gap: 0.45rem;
}

.message {
  margin-top: 0.7rem;
}

.inventory-list, .customer-list {
  display: grid;
  gap: 0.8rem;
}

.inventory-item, .customer-card {
  padding: 0.9rem;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface-2);
}

.inventory-item strong, .customer-card strong {
  display: block;
  margin-bottom: 0.2rem;
}

.reports-list {
  display: grid;
  gap: 0.8rem;
}

.report-card {
  padding: 0.95rem;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface-2);
}

@media (max-width: 920px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { border-right: none; border-bottom: 1px solid var(--border); }
  .stats-grid, .grid-2, .form-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .stats-grid, .grid-2, .form-grid { grid-template-columns: 1fr; }
  .topbar, .toolbar { flex-direction: column; align-items: stretch; }
  .topbar-actions { width: 100%; }
  .btn { width: 100%; }
}