/* ==========================================================================
   KINGSTER Design System: Base CSS & Design Tokens
   Engineered for High-Performance Hardware & Enterprise ERP
   Curated HSL Palettes, Modern Typography, Fluid Layouts, Zero Clichés
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
  /* Soothing, Clean, Eye-Friendly Light Palette (Apple / Stripe style) */
  --bg-primary: #f4f6f9;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f8fafc;
  --bg-surface-hover: #edf2f7;
  --bg-surface-active: #e2e8f0;

  --border-subtle: #e2e8f0;
  --border-strong: #cbd5e1;
  --border-focus: #0284c7;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  /* Calming Accents */
  --accent-cyan: #0284c7;
  --accent-cyan-hover: #0369a1;
  --accent-cyan-subtle: rgba(2, 132, 199, 0.1);

  --accent-amber: #d97706;
  --accent-amber-hover: #b45309;
  --accent-amber-subtle: rgba(217, 119, 6, 0.1);

  --accent-emerald: #059669;
  --accent-emerald-subtle: rgba(5, 150, 105, 0.1);

  --accent-rose: #e11d48;
  --accent-rose-subtle: rgba(225, 29, 72, 0.1);

  --accent-blue: #2563eb;
  --accent-blue-subtle: rgba(37, 99, 235, 0.1);

  /* Typography */
  --font-heading: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Shadows & Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 25px rgba(15, 23, 42, 0.08);
  --shadow-glow: 0 0 20px rgba(2, 132, 199, 0.16);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.2;
}

a {
  color: inherit;
  text-decoration: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Common Layout Utilities */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }

.grid { display: grid; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Typography Helpers */
.mono { font-family: var(--font-mono); }
.text-amber { color: var(--accent-amber); }
.text-cyan { color: var(--accent-cyan); }
.text-emerald { color: var(--accent-emerald); }
.text-rose { color: var(--accent-rose); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(2, 132, 199, 0.25);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #0369a1 0%, #075985 100%);
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.35);
}

.btn-secondary {
  background-color: #ffffff;
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:hover {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-strong);
}

.btn-danger {
  background-color: #ffe4e6;
  color: #e11d48;
  border: 1px solid #fecdd3;
}
.btn-danger:hover {
  background-color: #e11d48;
  color: #fff;
}

.btn-success {
  background-color: #dcfce7;
  color: #059669;
  border: 1px solid #bbf7d0;
}
.btn-success:hover {
  background-color: #059669;
  color: #fff;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  border-radius: var(--radius-lg);
}

/* Badges & Status Pills */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-ready, .badge-delivered, .badge-paid, .badge-approved, .badge-completed, .badge-pass {
  background-color: #ecfdf5;
  color: #047857;
  border: 1px solid #a7f3d0;
}

.badge-pending, .badge-unshipped, .badge-qc_pending, .badge-planning {
  background-color: #fffbeb;
  color: #b45309;
  border: 1px solid #fde68a;
}

.badge-packed, .badge-assembly, .badge-intransit, .badge-sent {
  background-color: #f0f9ff;
  color: #0369a1;
  border: 1px solid #bae6fd;
}

.badge-rejected, .badge-rto, .badge-cancelled, .badge-unpaid, .badge-defect {
  background-color: #fff1f2;
  color: #be123c;
  border: 1px solid #fecdd3;
}

.badge-reserved, .badge-rma {
  background-color: #eff6ff;
  color: #1d4ed8;
  border: 1px solid #bfdbfe;
}

/* Form Inputs */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.875rem;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.form-input::placeholder {
  color: var(--text-muted);
}

/* Card Surface */
.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
}

/* Data Table */
.data-table-wrapper {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
  box-shadow: var(--shadow-sm);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
}

.data-table th {
  background-color: var(--bg-surface-elevated);
  padding: 0.75rem 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
}

.data-table td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover td {
  background-color: var(--bg-surface-hover);
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-cols-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid-cols-4, .grid-cols-3, .grid-cols-2 { grid-template-columns: 1fr; }
  .container { padding: 0 1rem; }
}