/* ==========================================================================
   Industrial Engineering (IE) Dashboard - Design System & Modern Styles
   ========================================================================== */

:root {
  /* Color Palette - Modern Slate & Blue */
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --primary-border: #bfdbfe;
  
  --success: #10b981;
  --success-hover: #059669;
  --success-light: #ecfdf5;
  --success-border: #a7f3d0;

  --warning: #f59e0b;
  --warning-hover: #d97706;
  --warning-light: #fffbeb;
  --warning-border: #fde68a;

  --danger: #ef4444;
  --danger-hover: #dc2626;
  --danger-light: #fef2f2;
  --danger-border: #fecaca;

  --info: #06b6d4;
  --info-light: #ecfeff;

  --purple: #8b5cf6;
  --purple-light: #f5f3ff;

  /* Neutrals & Surfaces */
  --bg: #f8fafc;
  --card: #ffffff;
  --card-hover: #f1f5f9;
  --sidebar: #0f172a;
  --text-main: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  
  /* Shadows & Glassmorphism */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.08), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.04);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.05);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Typography */
  --font-family: 'Segoe UI', 'Sarabun', 'Leelawadee UI', 'Noto Sans Khmer', 'Khmer OS', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme */
body.dark-mode {
  --bg: #0b0f19;
  --card: #131b2e;
  --card-hover: #1e293b;
  --text-main: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --border: #1e293b;
  --border-light: #182234;
  --primary-light: rgba(37, 99, 235, 0.15);
  --primary-border: rgba(37, 99, 235, 0.3);
  --success-light: rgba(16, 185, 129, 0.15);
  --success-border: rgba(16, 185, 129, 0.3);
  --warning-light: rgba(245, 158, 11, 0.15);
  --warning-border: rgba(245, 158, 11, 0.3);
  --danger-light: rgba(239, 68, 68, 0.15);
  --danger-border: rgba(239, 68, 68, 0.3);
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* Container */
.app-container {
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
  padding: 16px 24px 40px;
  flex: 1;
}

/* Header Navbar */
.app-header {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-logo {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary) 0%, #4f46e5 100%);
  color: #fff;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
}

.brand-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.brand-subtitle {
  font-size: 12.5px;
  color: var(--text-muted);
  font-weight: 500;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* Sync & Status Badge */
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.status-pill:hover {
  border-color: var(--primary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 2px var(--success-light);
}

.status-dot.local {
  background: var(--warning);
  box-shadow: 0 0 0 2px var(--warning-light);
}

.status-dot.syncing {
  background: var(--primary);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.8; }
}

/* Language & Theme Controls */
.segmented-control {
  display: inline-flex;
  background: var(--bg);
  padding: 3px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.segmented-btn {
  padding: 6px 12px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  border-radius: calc(var(--radius-md) - 3px);
  cursor: pointer;
  transition: var(--transition);
}

.segmented-btn:hover {
  color: var(--text-main);
}

.segmented-btn.active {
  background: var(--card);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
  font-weight: 700;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  cursor: pointer;
  transition: var(--transition);
}

.icon-btn:hover {
  background: var(--card-hover);
  color: var(--text-main);
  border-color: var(--text-muted);
}

/* Main Navigation Tabs */
.main-nav-tabs {
  display: flex;
  gap: 8px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 6px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
  overflow-x: auto;
}

.main-tab-btn {
  flex: 1;
  min-width: 170px;
  padding: 12px 18px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: var(--transition);
}

.main-tab-btn:hover {
  background: var(--bg);
  color: var(--text-main);
}

.main-tab-btn.active {
  background: linear-gradient(135deg, var(--primary) 0%, #1d4ed8 100%);
  color: #fff;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
  font-weight: 700;
}

.main-tab-btn .tab-icon {
  font-size: 18px;
}

/* Tab Panels */
.tab-panel {
  display: none;
  animation: fadeIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Common Card Components */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
  flex-wrap: wrap;
  gap: 10px;
}

.card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-subtitle {
  font-size: 12.5px;
  color: var(--text-muted);
  font-weight: 400;
}

/* Grid Layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

/* Stat KPI Cards */
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--primary);
}

.stat-card.success::before { background: var(--success); }
.stat-card.warning::before { background: var(--warning); }
.stat-card.danger::before { background: var(--danger); }
.stat-card.purple::before { background: var(--purple); }

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.stat-card.success .stat-icon { background: var(--success-light); color: var(--success); }
.stat-card.warning .stat-icon { background: var(--warning-light); color: var(--warning); }
.stat-card.danger .stat-icon { background: var(--danger-light); color: var(--danger); }
.stat-card.purple .stat-icon { background: var(--purple-light); color: var(--purple); }

.stat-info {
  flex: 1;
}

.stat-value {
  font-size: 26px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 12.5px;
  color: var(--text-muted);
  font-weight: 600;
  margin-top: 4px;
}

.stat-sub {
  font-size: 11.5px;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* Forms & Inputs */
.form-group {
  margin-bottom: 14px;
}

label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.form-control, select, input[type="text"], input[type="number"], input[type="date"], textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 13.5px;
  background-color: var(--card);
  color: var(--text-main);
  font-family: inherit;
  transition: var(--transition);
}

.form-control:focus, select:focus, input:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

textarea {
  min-height: 70px;
  resize: vertical;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
}

.btn-success {
  background: var(--success);
  color: #fff;
}
.btn-success:hover {
  background: var(--success-hover);
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}
.btn-danger:hover {
  background: var(--danger-hover);
}

.btn-secondary {
  background: var(--bg);
  border-color: var(--border);
  color: var(--text-secondary);
}
.btn-secondary:hover {
  background: var(--card-hover);
  color: var(--text-main);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
  border-radius: var(--radius-sm);
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none !important;
}

/* Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  text-align: left;
}

th, td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

th {
  background: var(--bg);
  font-weight: 700;
  color: var(--text-secondary);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  position: sticky;
  top: 0;
  z-index: 2;
}

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

tr:hover td {
  background-color: var(--card-hover);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.badge-success { background: var(--success-light); color: var(--success); border: 1px solid var(--success-border); }
.badge-danger { background: var(--danger-light); color: var(--danger); border: 1px solid var(--danger-border); }
.badge-warning { background: var(--warning-light); color: var(--warning); border: 1px solid var(--warning-border); }
.badge-neutral { background: var(--bg); color: var(--text-muted); border: 1px solid var(--border); }
.badge-primary { background: var(--primary-light); color: var(--primary); border: 1px solid var(--primary-border); }

/* Machine Card Grid (First Start Tab) */
.machine-entry-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px;
  transition: var(--transition);
  position: relative;
}

.machine-entry-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.machine-entry-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.machine-title {
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.status-selector {
  display: flex;
  gap: 4px;
  margin-bottom: 10px;
}

.status-btn {
  flex: 1;
  padding: 7px 4px;
  font-size: 11.5px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-secondary);
  cursor: pointer;
  text-align: center;
  transition: var(--transition);
}

.status-btn.selected-ok {
  background: var(--success);
  border-color: var(--success);
  color: #fff;
}

.status-btn.selected-no {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

.status-btn.selected-off {
  background: #64748b;
  border-color: #64748b;
  color: #fff;
}

/* Timer Box (Downtime Tab) */
.timer-hero-box {
  background: linear-gradient(135deg, rgba(37,99,235,0.05) 0%, rgba(79,70,229,0.05) 100%);
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  margin: 16px 0;
  transition: var(--transition);
}

.timer-hero-box.active-running {
  background: linear-gradient(135deg, rgba(239,68,68,0.08) 0%, rgba(220,38,38,0.04) 100%);
  border-color: var(--danger);
  border-style: solid;
}

.timer-clock {
  font-size: 42px;
  font-weight: 900;
  color: var(--danger);
  font-family: 'Courier New', Courier, monospace;
  letter-spacing: 2px;
  margin: 8px 0;
  font-variant-numeric: tabular-nums;
  text-shadow: 0 2px 10px rgba(239,68,68,0.2);
}

/* Downtime Machine Status Grid */
.downtime-machine-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(135px, 1fr));
  gap: 10px;
  margin-bottom: 16px;
}

.downtime-machine-pill {
  padding: 10px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg);
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
}

.downtime-machine-pill:hover {
  border-color: var(--primary);
  transform: translateY(-1px);
}

.downtime-machine-pill.selected {
  border-color: var(--primary);
  background: var(--primary-light);
  box-shadow: 0 0 0 2px var(--primary);
}

.downtime-machine-pill.running {
  border-color: var(--danger);
  background: var(--danger-light);
  animation: pulse-border 2s infinite;
}

@keyframes pulse-border {
  0% { box-shadow: 0 0 0 0 rgba(239,68,68,0.4); }
  70% { box-shadow: 0 0 0 6px rgba(239,68,68,0); }
  100% { box-shadow: 0 0 0 0 rgba(239,68,68,0); }
}

/* Modal */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal-backdrop.show {
  display: flex;
}

.modal-content {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  animation: modalScale 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalScale {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.modal-header {
  padding: 18px 22px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-body {
  padding: 22px;
}

.modal-footer {
  padding: 14px 22px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  background: var(--bg);
  border-bottom-left-radius: var(--radius-lg);
  border-bottom-right-radius: var(--radius-lg);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  background: var(--sidebar);
  color: #fff;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  font-size: 13.5px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  pointer-events: auto;
  animation: toastIn 0.3s ease;
  min-width: 260px;
  max-width: 400px;
}

.toast.toast-success { background: #065f46; border-left: 4px solid var(--success); }
.toast.toast-error { background: #991b1b; border-left: 4px solid var(--danger); }
.toast.toast-info { background: #1e3a8a; border-left: 4px solid var(--primary); }

@keyframes toastIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Cause selection list (Downtime) */
.cause-list-container {
  max-height: 240px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 4px;
  background: var(--bg);
}

.cause-item {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2px;
  transition: var(--transition);
}

.cause-item:hover {
  background: var(--card);
  color: var(--primary);
}

.cause-item.selected {
  background: var(--danger-light);
  color: var(--danger);
  font-weight: 700;
  border: 1px solid var(--danger-border);
}

/* Standard Time Live Calculator Preview */
.calc-preview-card {
  background: linear-gradient(135deg, var(--bg) 0%, var(--primary-light) 100%);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-lg);
  padding: 18px;
}

.calc-preview-val {
  font-size: 28px;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

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

@media (max-width: 768px) {
  .app-container { padding: 12px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .app-header { flex-direction: column; align-items: stretch; }
  .header-actions { justify-content: space-between; }
  .main-tab-btn { min-width: 120px; font-size: 13px; padding: 10px; }
  .timer-clock { font-size: 32px; }
}