@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #f0f2f5;
  --sidebar-bg: #0f172a;
  --sidebar-text: #64748b;
  --sidebar-active-bg: rgba(99,102,241,.15);
  --sidebar-active-text: #818cf8;
  --white: #ffffff;
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-glow: rgba(99,102,241,.2);
  --danger: #f43f5e;
  --danger-dark: #e11d48;
  --success: #10b981;
  --warning: #f59e0b;
  --text: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,.08);
  --shadow-lg: 0 16px 32px rgba(0,0,0,.12);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Sidebar ── */
.sidebar {
  width: 232px;
  min-height: 100vh;
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  border-right: 1px solid rgba(255,255,255,.04);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 28px 20px 24px;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.logo-icon { font-size: 1.5rem; }
.logo-text {
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.4px;
}

.sidebar-nav { padding: 12px 12px; display: flex; flex-direction: column; gap: 2px; }
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: .875rem;
  font-weight: 500;
  transition: background .15s, color .15s;
  border-radius: 8px;
}
.nav-item:hover { background: rgba(255,255,255,.05); color: #cbd5e1; }
.nav-item.active {
  background: var(--sidebar-active-bg);
  color: var(--sidebar-active-text);
}
.nav-icon { font-size: 1rem; width: 20px; text-align: center; flex-shrink: 0; }

/* ── Main ── */
.main {
  margin-left: 232px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* ── Header ── */
.header {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-title { font-size: 1.1rem; font-weight: 700; color: var(--text); letter-spacing: -0.3px; }

/* ── Views ── */
.view { display: none; padding: 32px; }
.view.active { display: block; }

/* ── Stats Grid ── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}
.stat-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 16px;
  border: 1px solid var(--border);
  transition: box-shadow .2s, transform .2s;
}
.stat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-1px); }
.stat-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.stat-value { font-size: 1.6rem; font-weight: 700; color: var(--text); letter-spacing: -0.5px; }
.stat-label { font-size: .75rem; color: var(--text-muted); margin-top: 2px; font-weight: 500; }

/* ── Section Title ── */
.section-title { font-size: .875rem; font-weight: 600; color: var(--text); margin-bottom: 14px; letter-spacing: .1px; }

/* ── Alerts List ── */
.alerts-list { display: flex; flex-direction: column; gap: 8px; }
.alert-row {
  background: var(--white);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  border-left: 3px solid var(--warning);
}
.alert-row.out { border-left-color: var(--danger); }
.alert-name { font-weight: 600; font-size: .875rem; }
.alert-meta { font-size: .78rem; color: var(--text-muted); margin-top: 2px; }

/* ── Toolbar ── */
.toolbar {
  display: flex;
  gap: 10px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}
.search-input, .select-filter {
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .875rem;
  background: var(--white);
  color: var(--text);
  outline: none;
  font-family: inherit;
  transition: border-color .2s, box-shadow .2s;
}
.search-input { flex: 1; min-width: 200px; }
.search-input:focus, .select-filter:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

/* ── Table ── */
.table-wrapper {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  overflow: hidden;
}
.inventory-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .875rem;
}
.inventory-table thead { background: #f8fafc; }
.inventory-table th {
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  color: var(--text-muted);
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .6px;
  border-bottom: 1px solid var(--border);
}
.inventory-table td {
  padding: 13px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
.inventory-table tbody tr:last-child td { border-bottom: none; }
.inventory-table tbody tr:hover { background: #fafbfc; }

.item-name { font-weight: 600; }
.item-sku { font-size: .75rem; color: var(--text-muted); font-family: 'SF Mono', 'Fira Code', monospace; }

/* ── Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .1px;
}
.badge-ok    { background: #d1fae5; color: #065f46; }
.badge-low   { background: #fef3c7; color: #92400e; }
.badge-out   { background: #ffe4e6; color: #9f1239; }
.badge-cat   { background: #ede9fe; color: #5b21b6; }

/* ── Actions ── */
.actions { display: flex; gap: 6px; }
.btn-icon {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--white);
  cursor: pointer;
  font-size: .8rem;
  font-family: inherit;
  transition: background .15s, border-color .15s, color .15s;
}
.btn-icon:hover { background: #f8fafc; }
.btn-icon.edit:hover { border-color: var(--primary); color: var(--primary); background: #eef2ff; }
.btn-icon.delete:hover { border-color: var(--danger); color: var(--danger); background: #fff1f2; }

/* ── Empty State ── */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}
.empty-icon { font-size: 2.5rem; margin-bottom: 12px; }
.hidden { display: none !important; }

/* ── Buttons ── */
.btn {
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  border: none;
  font-size: .875rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background .15s, box-shadow .15s, transform .1s;
  letter-spacing: -0.1px;
}
.btn:active { transform: scale(.98); }
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 1px 3px rgba(99,102,241,.3);
}
.btn-primary:hover { background: var(--primary-dark); box-shadow: 0 4px 12px rgba(99,102,241,.35); }
.btn-secondary {
  background: #f8fafc;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: #f1f5f9; }
.btn-danger { background: var(--danger); color: #fff; box-shadow: 0 1px 3px rgba(244,63,94,.25); }
.btn-danger:hover { background: var(--danger-dark); }

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn .15s ease;
}
@keyframes fadeIn { from { opacity:0 } to { opacity:1 } }

.modal {
  background: var(--white);
  border-radius: 16px;
  width: 100%;
  max-width: 580px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  animation: slideUp .2s cubic-bezier(.16,1,.3,1);
}
.modal-sm { max-width: 400px; }
@keyframes slideUp {
  from { opacity:0; transform:translateY(16px) scale(.98) }
  to   { opacity:1; transform:translateY(0) scale(1) }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 24px 0;
}
.modal-header h2 { font-size: 1rem; font-weight: 700; letter-spacing: -0.2px; }
.modal-close {
  background: none; border: none; font-size: 1.4rem; cursor: pointer;
  color: var(--text-muted); line-height: 1; transition: color .15s;
  width: 28px; height: 28px; display: flex; align-items: center; justify-content: center;
  border-radius: 6px;
}
.modal-close:hover { color: var(--text); background: #f1f5f9; }

.modal-body { padding: 20px 24px; }
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 0 24px 24px;
}

/* ── Form ── */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group-full { grid-column: 1 / -1; }
.form-group label { font-size: .75rem; font-weight: 600; color: var(--text-muted); letter-spacing: .1px; }
.form-group input, .form-group textarea, .form-group select {
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .875rem;
  font-family: inherit;
  color: var(--text);
  outline: none;
  transition: border-color .2s, box-shadow .2s;
  background: var(--white);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}
.form-group textarea { resize: vertical; }

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 28px; right: 28px;
  background: #0f172a;
  color: #fff;
  padding: 12px 18px;
  border-radius: 10px;
  font-size: .875rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 999;
  border: 1px solid rgba(255,255,255,.08);
  animation: slideInRight .25s cubic-bezier(.16,1,.3,1);
}
.toast.success { background: #064e3b; border-color: rgba(16,185,129,.2); }
.toast.error   { background: #881337; border-color: rgba(244,63,94,.2); }
@keyframes slideInRight {
  from { opacity:0; transform:translateX(20px) }
  to   { opacity:1; transform:translateX(0) }
}

/* ── Orders ── */
.order-line-add { display: flex; gap: 8px; align-items: center; }
.order-lines-table { font-size: .82rem; }
.badge-pending   { background: #fef3c7; color: #92400e; }
.badge-fulfilled { background: #d1fae5; color: #065f46; }
.badge-cancelled { background: #f1f5f9; color: #64748b; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .sidebar { width: 64px; }
  .logo-text, .nav-item span:not(.nav-icon) { display: none; }
  .main { margin-left: 64px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .view { padding: 20px; }
}