:root {
  --bg: #F4F3EF;
  --sidebar: #1A1A1A;
  --card: #FFFFFF;
  --yellow: #F1C40F;
  --yellow-dark: #D4AC0D;
  --text: #1A1A1A;
  --text-muted: #777;
  --border: #E5E3DC;
  --danger: #E74C3C;
  --success: #27AE60;
  --info: #2980B9;
  --low-stock: #FFF3CD;
  --low-stock-border: #FFD700;
  --radius: 10px;
  --font: 'DM Sans', sans-serif;
  --mono: 'Space Mono', monospace;
  --shadow: 0 2px 12px rgba(0,0,0,0.07);
  --shadow-md: 0 4px 24px rgba(0,0,0,0.11);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; font-family: var(--font); background: var(--bg); color: var(--text); }

/* ─── Login ─── */
#login-screen {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh;
  background: var(--sidebar);
}
.login-box {
  background: var(--card); border-radius: 16px; padding: 48px 40px;
  width: 380px; box-shadow: 0 8px 48px rgba(0,0,0,0.35);
}
.login-logo { font-family: var(--mono); font-size: 11px; color: var(--text-muted); letter-spacing:2px; text-transform:uppercase; margin-bottom:32px; }
.login-title { font-size: 28px; font-weight: 700; margin-bottom: 32px; }
.login-box input {
  width: 100%; padding: 12px 14px; border: 1.5px solid var(--border);
  border-radius: 8px; font-size: 15px; font-family: var(--font);
  background: var(--bg); transition: border .2s;
  margin-bottom: 16px; display: block;
}
.login-box input:focus { outline: none; border-color: var(--yellow); }
.btn-login {
  width: 100%; background: var(--yellow); color: var(--text); border: none;
  border-radius: 8px; padding: 14px; font-size: 15px; font-weight: 700;
  cursor: pointer; font-family: var(--font); transition: background .2s;
}
.btn-login:hover { background: var(--yellow-dark); }
.login-hint { font-size: 12px; color: var(--text-muted); margin-top: 16px; text-align:center; }

/* ─── App Layout ─── */
#app { display: none; height: 100vh; overflow: hidden; }
.layout { display: flex; height: 100%; }

/* ─── Sidebar ─── */
.sidebar {
  width: 230px; min-width: 230px; background: var(--sidebar); color: #bbb;
  display: flex; flex-direction: column; padding: 0; overflow-y: auto;
  transition: width .3s;
}
.sidebar-header {
  padding: 22px 20px 16px; border-bottom: 1px solid rgba(255,255,255,.07);
}
.sidebar-logo { font-family: var(--mono); font-size: 10px; color: #555; letter-spacing:2px; text-transform:uppercase; margin-bottom:4px; }
.sidebar-title { font-size: 18px; font-weight: 700; color: #fff; }
.sidebar-user { font-size: 12px; color: #666; margin-top:6px; }
.nav-section { padding: 12px 12px 4px; font-size: 10px; color: #444; letter-spacing: 1.5px; text-transform: uppercase; font-family: var(--mono); }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 20px; cursor: pointer; border-radius: 8px;
  margin: 2px 8px; font-size: 14px; color: #888; font-weight:500;
  transition: all .15s;
}
.nav-item:hover { background: rgba(255,255,255,.05); color: #ccc; }
.nav-item.active { background: var(--yellow); color: #1a1a1a; }
.nav-item svg { width: 16px; height: 16px; flex-shrink:0; }
.nav-sub { padding: 0 8px 4px 20px; }
.nav-sub .nav-item { margin: 1px 0; font-size: 13px; padding: 8px 14px; }
.sidebar-footer { margin-top: auto; padding: 12px; border-top: 1px solid rgba(255,255,255,.07); }
.btn-logout {
  width: 100%; padding: 10px; background: transparent; border: 1px solid #333;
  color: #666; border-radius: 8px; cursor: pointer; font-family: var(--font);
  font-size: 13px; transition: all .2s;
}
.btn-logout:hover { border-color: var(--danger); color: var(--danger); }

/* ─── Main ─── */
.main { flex: 1; overflow-y: auto; padding: 28px 32px; }
.page { display: none; }
.page.active { display: block; }
.page-header { margin-bottom: 24px; }
.page-title { font-size: 26px; font-weight: 700; }
.page-sub { font-size: 14px; color: var(--text-muted); margin-top: 4px; }

/* ─── Cards ─── */
.cards-row { display: flex; gap: 16px; margin-bottom: 24px; flex-wrap: wrap; }
.stat-card {
  flex: 1; min-width: 160px; background: var(--card); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow); border: 1.5px solid var(--border);
}
.stat-card .label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing:1px; font-family: var(--mono); }
.stat-card .value { font-size: 32px; font-weight: 700; margin: 6px 0 2px; }
.stat-card .sub { font-size: 12px; color: var(--text-muted); }
.stat-card.yellow { border-color: var(--yellow); background: #FFFBEA; }
.stat-card.red { border-color: #FFCDD2; background: #FFF5F5; }

/* ─── Table Card ─── */
.card {
  background: var(--card); border-radius: var(--radius);
  box-shadow: var(--shadow); border: 1.5px solid var(--border);
  overflow: hidden; margin-bottom: 24px;
}
.card-header {
  padding: 16px 20px; border-bottom: 1.5px solid var(--border);
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px;
}
.card-title { font-size: 15px; font-weight: 700; }
.card-body { padding: 0; }
.card-body-padded { padding: 20px; }

/* ─── Table ─── */
.tbl-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
thead th {
  background: #F8F7F3; padding: 10px 14px; text-align: left;
  font-size: 11px; font-family: var(--mono); color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 1px;
  border-bottom: 1.5px solid var(--border); cursor: pointer; user-select: none;
  white-space: nowrap;
}
thead th:hover { background: #F0EEE8; }
tbody tr { border-bottom: 1px solid var(--border); transition: background .1s; }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: #F9F8F4; }
tbody td { padding: 10px 14px; vertical-align: middle; }
.badge {
  display: inline-block; padding: 2px 8px; border-radius: 20px; font-size: 11px; font-weight: 600;
}
.badge-ativo { background:#DCFCE7; color:#15803D; }
.badge-inativo { background:#FEE2E2; color:#B91C1C; }
.badge-low { background:var(--low-stock); color:#92400E; border:1px solid var(--low-stock-border); }
.row-low { background: #FFFCEB !important; }

/* ─── Form ─── */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-grid.single { grid-template-columns: 1fr; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group.full { grid-column: 1 / -1; }
label { font-size: 12px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing:.5px; }
input[type=text], input[type=number], input[type=email], input[type=password],
select, textarea {
  padding: 10px 12px; border: 1.5px solid var(--border); border-radius: 8px;
  font-size: 14px; font-family: var(--font); background: var(--bg);
  transition: border .2s; width: 100%;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--yellow); }
textarea { resize: vertical; min-height: 70px; }
.btn {
  padding: 10px 20px; border: none; border-radius: 8px; font-size: 13.5px;
  font-weight: 700; cursor: pointer; font-family: var(--font); transition: all .15s;
  display: inline-flex; align-items: center; gap: 6px; white-space: nowrap;
}
.btn-primary { background: var(--yellow); color: var(--text); }
.btn-primary:hover { background: var(--yellow-dark); }
.btn-secondary { background: #F0EEE8; color: var(--text); }
.btn-secondary:hover { background: #E5E3DC; }
.btn-danger { background: #FEE2E2; color: var(--danger); }
.btn-danger:hover { background: #FECACA; }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

/* ─── Filters ─── */
.filters { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.filters input, .filters select {
  padding: 8px 12px; font-size: 13px; border: 1.5px solid var(--border);
  border-radius: 8px; background: var(--bg); min-width: 160px;
}
.filters input:focus, .filters select:focus { outline: none; border-color: var(--yellow); }

/* ─── Tabs ─── */
.tabs { display: flex; border-bottom: 2px solid var(--border); margin-bottom: 24px; }
.tab {
  padding: 10px 20px; cursor: pointer; font-weight: 600; font-size: 14px;
  color: var(--text-muted); border-bottom: 3px solid transparent; margin-bottom: -2px;
  transition: all .15s;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--text); border-color: var(--yellow); }

/* ─── Modal ─── */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity .2s;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal {
  background: var(--card); border-radius: 14px; width: 520px; max-width: 95vw;
  max-height: 90vh; overflow-y: auto;
  box-shadow: 0 16px 60px rgba(0,0,0,.3); padding: 28px;
  transform: translateY(12px); transition: transform .2s;
}
.modal-overlay.open .modal { transform: translateY(0); }
.modal-title { font-size: 18px; font-weight: 700; margin-bottom: 20px; }
.modal-footer { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }

/* ─── Alert ─── */
.alert {
  padding: 10px 16px; border-radius: 8px; font-size: 13px;
  margin-bottom: 16px; display: none;
}
.alert.show { display: block; }
.alert-success { background: #DCFCE7; color: #166534; }
.alert-error { background: #FEE2E2; color: #991B1B; }
.alert-info { background: #DBEAFE; color: #1E40AF; }

/* ─── Chart ─── */
.chart-container { padding: 20px; height: 260px; }

/* ─── Misc ─── */
.empty-state { text-align: center; padding: 40px; color: var(--text-muted); font-size: 14px; }
.text-right { text-align: right; }
.text-center { text-align: center; }
.gap-2 { gap: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.w-full { width: 100%; }
.font-mono { font-family: var(--mono); }
.text-sm { font-size: 12px; }
.text-muted { color: var(--text-muted); }
hr { border: none; border-top: 1.5px solid var(--border); margin: 20px 0; }
.spinner {
  display: inline-block; width: 18px; height: 18px;
  border: 2px solid #ddd; border-top-color: var(--yellow);
  border-radius: 50%; animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-overlay {
  position: fixed; inset: 0; background: rgba(255,255,255,.75);
  display: flex; align-items: center; justify-content: center; z-index: 9999;
}