/* =============================================
   PRODUCT LIBRARY — DESIGN SYSTEM
   Based on brand.sonance.com guidelines
   Consistent with Purchase Requests app
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700&display=swap');

/* ---- CSS Variables ---- */
:root {
  /* Sonance Brand Colors */
  --sonance-charcoal: #333F48;
  --sonance-blue: #00A3E1;
  --sonance-green: #00B2A9;
  --sonance-light-gray: #D9D9D6;

  /* Gray Scale */
  --gray-50: #f8f9fa;
  --gray-100: #f0f2f3;
  --gray-200: #D9D9D6;
  --gray-300: #b8bfc4;
  --gray-400: #8f999f;
  --gray-500: #6b7780;
  --gray-600: #515c64;
  --gray-700: #424c54;
  --gray-800: #3a444c;
  --gray-900: #333F48;

  /* Feedback */
  --success: #2E7D32;
  --error: #C62828;
  --warning: #F57C00;
  --info: #1565C0;

  /* Light Mode (default) */
  --bg: #FFFFFF;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #f0f2f3;
  --fg: #333F48;
  --fg-secondary: #515c64;
  --fg-muted: #6b7780;
  --border: #D9D9D6;
  --primary: #333F48;
  --primary-hover: #424c54;
  --accent: #00A3E1;
  --surface: #FFFFFF;
  --surface-elevated: #f8f9fa;
  --input-bg: #FFFFFF;
  --shadow-sm: 0 1px 2px rgba(51, 63, 72, 0.06);
  --shadow-md: 0 4px 12px rgba(51, 63, 72, 0.08);
  --shadow-lg: 0 8px 24px rgba(51, 63, 72, 0.12);

  /* Typography */
  --font-sans: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  /* Spacing */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;

  /* Transitions */
  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- Dark Mode ---- */
[data-theme="dark"] {
  --bg: #1a1f24;
  --bg-secondary: #242a31;
  --bg-tertiary: #2d343c;
  --fg: #FFFFFF;
  --fg-secondary: #D9D9D6;
  --fg-muted: #8f999f;
  --border: #3a444c;
  --primary: #FFFFFF;
  --primary-hover: #D9D9D6;
  --accent: #00A3E1;
  --surface: #242a31;
  --surface-elevated: #333F48;
  --input-bg: #2d343c;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
}

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

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

body {
  font-family: var(--font-sans);
  font-weight: var(--font-normal);
  color: var(--fg);
  background: var(--bg);
  line-height: 1.6;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity var(--transition);
}
a:hover { opacity: 0.8; }

/* ---- Typography ---- */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-medium);
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--fg);
}

h1 { font-size: clamp(1.5rem, 2.5vw, 2.25rem); font-weight: var(--font-light); }
h2 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h3 { font-size: clamp(1.1rem, 1.5vw, 1.25rem); }
h4 { font-size: 1rem; font-weight: var(--font-semibold); }

.text-xs { font-size: clamp(0.625rem, 1vw, 0.75rem); }
.text-sm { font-size: clamp(0.75rem, 1.2vw, 0.875rem); }
.text-base { font-size: clamp(0.875rem, 1.3vw, 1rem); }
.text-lg { font-size: clamp(1rem, 1.5vw, 1.125rem); }
.text-muted { color: var(--fg-muted); }
.text-secondary { color: var(--fg-secondary); }
.text-center { text-align: center; }
.text-success { color: var(--success); }
.text-error { color: var(--error); }

.hidden { display: none !important; }

/* ---- Layout ---- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  width: 100%;
}

.page-header {
  margin-bottom: 2rem;
}

.page-header h1 {
  margin-bottom: 0.25rem;
}

.page-header p,
.page-subtitle {
  color: var(--fg-muted);
  font-size: 0.875rem;
}

/* ---- Navbar ---- */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  height: 60px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.navbar-brand {
  font-weight: var(--font-semibold);
  font-size: 0.875rem;
  color: var(--fg);
  letter-spacing: -0.01em;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.navbar-nav a {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius);
  font-size: 0.8125rem;
  font-weight: var(--font-medium);
  color: var(--fg-muted);
  transition: all var(--transition);
}

.navbar-nav a:hover,
.navbar-nav a.active {
  color: var(--fg);
  background: var(--bg-tertiary);
  opacity: 1;
}

.navbar-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.user-name {
  font-size: 0.8125rem;
  font-weight: var(--font-medium);
  color: var(--fg-secondary);
}

.btn-logout {
  font-size: 0.75rem;
  color: var(--fg-muted);
}

/* ---- Theme Toggle ---- */
.theme-toggle {
  position: relative;
  width: 44px;
  height: 24px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  padding: 0 3px;
}

.theme-toggle::after {
  content: '';
  width: 18px;
  height: 18px;
  background: var(--fg);
  border-radius: 50%;
  transition: transform var(--transition);
  transform: translateX(0);
}

[data-theme="dark"] .theme-toggle::after {
  transform: translateX(19px);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  position: absolute;
  font-size: 10px;
  pointer-events: none;
}

.theme-toggle .icon-sun { left: 5px; }
.theme-toggle .icon-moon { right: 5px; }

/* ---- Cards ---- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  transition: all var(--transition);
}

.card h3 {
  margin-bottom: 0.5rem;
}

.card p {
  margin-bottom: 0.75rem;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: var(--font-semibold);
  line-height: 1;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  min-height: 40px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--primary);
  color: var(--bg);
}
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); }

.btn-accent {
  background: var(--accent);
  color: #FFFFFF;
}
.btn-accent:hover:not(:disabled) { opacity: 0.9; }

.btn-ghost {
  background: transparent;
  color: var(--fg-secondary);
  border: 1px solid var(--border);
}
.btn-ghost:hover:not(:disabled) {
  background: var(--bg-tertiary);
  color: var(--fg);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
  min-height: 32px;
  border-radius: var(--radius-sm);
}

/* ---- Forms ---- */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.75rem;
  font-weight: var(--font-semibold);
  color: var(--fg-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.375rem;
}

.form-input,
select.form-input {
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: var(--font-normal);
  color: var(--fg);
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
  min-height: 44px;
  outline: none;
}

.form-input:focus,
select.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 163, 225, 0.12);
}

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

.form-error {
  font-size: 0.6875rem;
  color: var(--error);
  margin-top: 0.25rem;
}

/* ---- Filters Bar ---- */
.filters-bar {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.filters-bar .form-input,
.filters-bar select.form-input {
  min-width: 160px;
  flex: 1;
  max-width: 280px;
}

/* ---- Tables ---- */
.table-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow-x: auto;
}

table, .data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
}

thead th {
  padding: 0.75rem 1rem;
  text-align: left;
  font-size: 0.6875rem;
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-muted);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

tbody td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--fg-secondary);
  vertical-align: middle;
}

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

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

.clickable-row {
  cursor: pointer;
}

/* ---- Badges ---- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.625rem;
  font-size: 0.6875rem;
  font-weight: var(--font-semibold);
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
  background: var(--bg-tertiary);
  color: var(--fg-secondary);
}

.badge-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

/* Item Type Badges */
.badge-FG { background: #E3F2FD; color: #1565C0; }
.badge-SFG { background: #F3E5F5; color: #7B1FA2; }
.badge-component { background: #FFF3E0; color: #E65100; }
.badge-raw_material { background: #EFEBE9; color: #4E342E; }

[data-theme="dark"] .badge-FG { background: #1565C0; color: #E3F2FD; }
[data-theme="dark"] .badge-SFG { background: #7B1FA2; color: #F3E5F5; }
[data-theme="dark"] .badge-component { background: #E65100; color: #FFF3E0; }
[data-theme="dark"] .badge-raw_material { background: #4E342E; color: #EFEBE9; }

/* Item Status Badges */
.badge-active { background: #E8F5E9; color: #2E7D32; }
.badge-npd { background: #E3F2FD; color: #1565C0; }
.badge-eol { background: #FFF3E0; color: #E65100; }
.badge-discontinued { background: #FFEBEE; color: #C62828; }

[data-theme="dark"] .badge-active { background: #2E7D32; color: #E8F5E9; }
[data-theme="dark"] .badge-npd { background: #1565C0; color: #E3F2FD; }
[data-theme="dark"] .badge-eol { background: #E65100; color: #FFF3E0; }
[data-theme="dark"] .badge-discontinued { background: #C62828; color: #FFEBEE; }

/* ---- Tabs ---- */
.tab-bar {
  display: flex;
  gap: 0.25rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.tab {
  padding: 0.75rem 1.25rem;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: var(--font-medium);
  color: var(--fg-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}

.tab:hover {
  color: var(--fg);
}

.tab.active {
  color: var(--fg);
  border-bottom-color: var(--accent);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* ---- BOM Explorer ---- */
.bom-header {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.bom-header h2 {
  margin-bottom: 0.25rem;
}

.bom-header-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.bom-header-actions {
  display: flex;
  gap: 0.5rem;
  flex-shrink: 0;
}

.bom-tree {
  margin-bottom: 2rem;
}

/* Tree structure */
.bom-tree-root,
.bom-tree-children {
  list-style: none;
  padding: 0;
  margin: 0;
}

.bom-tree-children {
  padding-left: 1.5rem;
  border-left: 1px solid var(--border);
  margin-left: 0.5rem;
}

.bom-tree-children.collapsed {
  display: none;
}

.bom-tree-node {
  padding: 0.5rem 0;
  position: relative;
}

.bom-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.25rem;
  height: 1.25rem;
  font-size: 0.625rem;
  color: var(--fg-muted);
  flex-shrink: 0;
  user-select: none;
}

.bom-toggle.has-children {
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.bom-toggle.has-children:hover {
  background: var(--bg-tertiary);
  color: var(--fg);
}

.bom-node-info {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  font-size: 0.8125rem;
}

.bom-type-icon {
  font-size: 0.625rem;
  width: 1rem;
  text-align: center;
}

.bom-type-icon.badge-FG { color: #1565C0; }
.bom-type-icon.badge-SFG { color: #7B1FA2; }
.bom-type-icon.badge-component { color: #E65100; }
.bom-type-icon.badge-raw_material { color: #4E342E; }

[data-theme="dark"] .bom-type-icon.badge-FG { color: #64B5F6; }
[data-theme="dark"] .bom-type-icon.badge-SFG { color: #CE93D8; }
[data-theme="dark"] .bom-type-icon.badge-component { color: #FFB74D; }
[data-theme="dark"] .bom-type-icon.badge-raw_material { color: #BCAAA4; }

.bom-sku {
  color: var(--accent);
  cursor: pointer;
  font-family: var(--font-sans);
}

.bom-sku:hover {
  text-decoration: underline;
}

.bom-desc {
  color: var(--fg-secondary);
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.bom-qty {
  font-weight: var(--font-semibold);
  color: var(--fg);
  background: var(--bg-tertiary);
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
}

.bom-cost {
  color: var(--fg-muted);
  font-size: 0.75rem;
}

.bom-lt {
  color: var(--fg-muted);
  font-size: 0.75rem;
}

.bom-rules-tag {
  background: #E3F2FD;
  color: #1565C0;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.625rem;
  font-weight: var(--font-semibold);
  cursor: help;
}

[data-theme="dark"] .bom-rules-tag {
  background: #1565C0;
  color: #E3F2FD;
}

/* Where Used */
.where-used-item {
  padding: 0.75rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.5rem;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.where-used-item:hover {
  background: var(--bg-secondary);
}

/* ---- Configurator Layout ---- */
.configurator-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 1.5rem;
  align-items: start;
}

.config-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  position: sticky;
  top: 76px;
}

.bom-result {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  min-height: 300px;
}

@media (max-width: 768px) {
  .configurator-layout {
    grid-template-columns: 1fr;
  }

  .config-panel {
    position: static;
  }

  .navbar {
    flex-wrap: wrap;
    height: auto;
    padding: 0.5rem 1rem;
    gap: 0.5rem;
  }

  .navbar-nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
  }

  .filters-bar {
    flex-direction: column;
  }

  .filters-bar .form-input,
  .filters-bar select.form-input {
    max-width: none;
  }
}

/* ---- Login ---- */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-lg);
}

.login-logo {
  text-align: center;
  margin-bottom: 2rem;
}

.login-logo svg {
  margin-bottom: 1rem;
}

.login-logo h2 {
  font-size: 1rem;
  font-weight: var(--font-medium);
  margin-bottom: 0.25rem;
}

.login-logo p {
  font-size: 0.8125rem;
  color: var(--fg-muted);
}

.login-form .btn {
  width: 100%;
  margin-top: 0.5rem;
}

.login-footer {
  text-align: center;
}

/* ---- Toggle Switch (Configurator) ---- */
.toggle {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  cursor: pointer;
}

.toggle input { display: none; }

.toggle-track {
  position: relative;
  width: 44px;
  height: 24px;
  background: var(--border);
  border-radius: 12px;
  transition: background var(--transition);
  flex-shrink: 0;
}

.toggle-track::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background: white;
  border-radius: 50%;
  transition: transform var(--transition);
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

.toggle input:checked + .toggle-track {
  background: var(--accent);
}

.toggle input:checked + .toggle-track::after {
  transform: translateX(20px);
}

.toggle-label {
  font-size: 0.875rem;
  font-weight: var(--font-medium);
  color: var(--fg);
}