:root {
  --md-primary: #1a73e8;
  --md-primary-dark: #1557b0;
  --md-success: #1e8e3e;
  --md-error: #d93025;
  --md-warning: #f9ab00;
  --md-surface: #ffffff;
  --md-surface-variant: #f8f9fa;
  --md-on-surface: #202124;
  --md-on-surface-secondary: #5f6368;
  --md-outline: #dadce0;
  --md-radius: 8px;
  --md-radius-lg: 12px;
}

* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}

html, body {
  max-width: 100vw;
  overflow-x: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--md-on-surface);
  background: var(--md-surface-variant);
  -webkit-font-smoothing: antialiased;
}

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

.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.spinning {
  animation: spin 1s linear infinite;
}

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  color: var(--md-primary);
}

.loading .material-symbols-outlined {
  font-size: 36px;
}

.auth-loading {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--md-surface-variant);
}

.auth-loading .material-symbols-outlined {
  font-size: 48px;
  color: var(--md-primary);
}

.card {
  background: var(--md-surface);
  border-radius: var(--md-radius-lg);
  border: 1px solid var(--md-outline);
  overflow: hidden;
}

.card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--md-outline);
  font-size: 14px;
  font-weight: 500;
  color: var(--md-on-surface);
}

.card-header .material-symbols-outlined {
  font-size: 20px;
  color: var(--md-primary);
}

.card-body {
  padding: 20px;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  border: 1px solid var(--md-outline);
  border-radius: 20px;
  background: transparent;
  color: var(--md-on-surface-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-outline:hover {
  background: var(--md-surface-variant);
}

.btn-outline .material-symbols-outlined {
  font-size: 16px;
}

.empty-message {
  text-align: center;
  padding: 32px;
  color: var(--md-on-surface-secondary);
  font-size: 14px;
}

.home-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 20px;
}

.home-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.home-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.home-title .material-symbols-outlined {
  font-size: 32px;
  color: var(--md-primary);
}

.home-title h1 {
  font-size: 24px;
  font-weight: 500;
}

.home-user {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--md-on-surface-secondary);
}

.tenant-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.tenant-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 24px 16px;
  border: 1px solid var(--md-outline);
  border-radius: var(--md-radius-lg);
  background: var(--md-surface);
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.tenant-card:hover {
  border-color: var(--md-primary);
  box-shadow: 0 2px 8px rgba(26, 115, 232, 0.15);
}

.tenant-icon {
  font-size: 36px;
  color: var(--md-primary);
}

.tenant-name {
  font-size: 15px;
  font-weight: 500;
  color: var(--md-on-surface);
}

.tenant-id {
  font-size: 12px;
  color: var(--md-on-surface-secondary);
}

.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--md-surface-variant);
  padding: 20px;
}

.login-card {
  background: var(--md-surface);
  border-radius: var(--md-radius-lg);
  padding: 40px;
  width: 100%;
  max-width: 400px;
  border: 1px solid var(--md-outline);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.05);
}

.login-header {
  text-align: center;
  margin-bottom: 32px;
}

.login-icon {
  font-size: 48px;
  color: var(--md-primary);
  margin-bottom: 12px;
  display: block;
}

.login-header h1 {
  font-size: 24px;
  font-weight: 500;
  margin: 0 0 8px 0;
}

.login-header p {
  font-size: 14px;
  color: var(--md-on-surface-secondary);
  margin: 0;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.login-error {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: #fce8e6;
  border-radius: var(--md-radius);
  color: var(--md-error);
  font-size: 14px;
}

.login-error .material-symbols-outlined {
  font-size: 20px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-field label {
  font-size: 14px;
  font-weight: 500;
  color: var(--md-on-surface-secondary);
}

.form-field input {
  padding: 14px 16px;
  border: 1px solid var(--md-outline);
  border-radius: var(--md-radius);
  background: var(--md-surface);
  color: var(--md-on-surface);
  font-size: 16px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-field input:focus {
  outline: none;
  border-color: var(--md-primary);
  box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.2);
}

.form-field input::placeholder {
  color: #9aa0a6;
}

.form-field input:disabled {
  background: #f1f3f4;
  opacity: 0.7;
  cursor: not-allowed;
}

.login-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  background: var(--md-primary);
  color: #ffffff;
  border: none;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s;
  margin-top: 8px;
}

.login-button:hover:not(:disabled) {
  background: var(--md-primary-dark);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.login-button:disabled {
  background: #a8c7fa;
  cursor: not-allowed;
}

.login-button .material-symbols-outlined {
  font-size: 18px;
}

.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--md-radius);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  min-width: 300px;
  max-width: 480px;
  animation: toast-in 0.3s ease;
}

.toast-success { background: #e6f4ea; color: var(--md-success); }
.toast-error { background: #fce8e6; color: var(--md-error); }
.toast-info { background: #e8f0fe; color: var(--md-primary); }

.toast-icon { font-size: 20px; }
.toast-message { flex: 1; font-size: 14px; }

.toast-close {
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
  opacity: 0.6;
  padding: 4px;
}

.toast-close:hover { opacity: 1; }

.toast-exit {
  animation: toast-out 0.3s ease forwards;
}

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

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

/* ===== TopNav ===== */
.topnav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  background: var(--md-surface);
  border-bottom: 1px solid var(--md-outline);
  z-index: 100;
}

.topnav-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topnav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--md-radius);
  color: var(--md-primary);
  transition: background 0.2s;
}

.topnav-brand:hover {
  background: var(--md-surface-variant);
}

.topnav-brand .material-symbols-outlined {
  font-size: 24px;
}

.topnav-app-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--md-on-surface);
}

.topnav-divider {
  width: 1px;
  height: 24px;
  background: var(--md-outline);
}

.topnav-tenant {
  font-size: 14px;
  font-weight: 500;
  color: var(--md-on-surface-secondary);
}

.topnav-center {
  display: flex;
  align-items: center;
  gap: 4px;
}

.topnav-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: none;
  border: none;
  border-radius: 20px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--md-on-surface-secondary);
  transition: background 0.2s, color 0.2s;
}

.topnav-item:hover {
  background: var(--md-surface-variant);
  color: var(--md-on-surface);
}

.topnav-item.active {
  background: #e8f0fe;
  color: var(--md-primary);
}

.topnav-item .material-symbols-outlined {
  font-size: 18px;
}

.topnav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topnav-user {
  font-size: 13px;
  color: var(--md-on-surface-secondary);
}

/* ===== Tenant Layout ===== */
.tenant-layout {
  min-height: 100vh;
}

.tenant-main {
  padding-top: 56px;
}

/* ===== Page Common ===== */
.page-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.page-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 500;
}

.page-title .material-symbols-outlined {
  font-size: 28px;
  color: var(--md-primary);
}

.page-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 80px 20px;
  color: var(--md-error);
}

.page-error .material-symbols-outlined {
  font-size: 48px;
}

.page-error p {
  font-size: 16px;
  color: var(--md-on-surface-secondary);
}

.page-breadcrumb {
  margin-bottom: 16px;
}

/* ===== Buttons ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  background: var(--md-primary);
  color: #ffffff;
  border: none;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s;
}

.btn-primary:hover:not(:disabled) {
  background: var(--md-primary-dark);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary .material-symbols-outlined {
  font-size: 18px;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

.btn-sm .material-symbols-outlined {
  font-size: 16px;
}

.btn-text {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: none;
  color: var(--md-on-surface-secondary);
  font-size: 13px;
  cursor: pointer;
  padding: 6px 8px;
  border-radius: var(--md-radius);
  transition: background 0.2s, color 0.2s;
}

.btn-text:hover {
  background: var(--md-surface-variant);
  color: var(--md-on-surface);
}

.btn-text .material-symbols-outlined {
  font-size: 18px;
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  color: var(--md-on-surface-secondary);
  transition: background 0.2s, color 0.2s;
}

.btn-icon:hover {
  background: var(--md-surface-variant);
  color: var(--md-on-surface);
}

.btn-icon .material-symbols-outlined {
  font-size: 18px;
}

.btn-icon-danger:hover {
  background: #fce8e6;
  color: var(--md-error);
}

/* ===== Empty State ===== */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 60px 20px;
  color: var(--md-on-surface-secondary);
}

.empty-state .material-symbols-outlined {
  font-size: 48px;
  opacity: 0.4;
}

.empty-state p {
  font-size: 15px;
}

/* ===== Machine Grid ===== */
.machine-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.machine-card {
  background: var(--md-surface);
  border: 1px solid var(--md-outline);
  border-radius: var(--md-radius-lg);
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.machine-card:hover {
  border-color: var(--md-primary);
  box-shadow: 0 2px 8px rgba(26, 115, 232, 0.12);
}

.machine-card-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px;
  cursor: pointer;
}

.machine-card-icon {
  color: var(--md-primary);
}

.machine-card-icon .material-symbols-outlined {
  font-size: 32px;
}

.machine-card-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.machine-card-name {
  font-size: 16px;
  font-weight: 500;
}

.machine-card-code {
  font-size: 13px;
  color: var(--md-on-surface-secondary);
  font-family: 'SF Mono', 'Menlo', monospace;
}

.machine-card-model {
  font-size: 12px;
  color: var(--md-on-surface-secondary);
}

.machine-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 8px;
  border-top: 1px solid var(--md-outline);
}

.machine-card-parts {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--md-on-surface-secondary);
}

.machine-card-parts .material-symbols-outlined {
  font-size: 16px;
}

.machine-card-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  padding: 8px 12px;
  border-top: 1px solid var(--md-outline);
  background: var(--md-surface-variant);
}

/* ===== Detail Page ===== */
.detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding: 20px;
  background: var(--md-surface);
  border: 1px solid var(--md-outline);
  border-radius: var(--md-radius-lg);
}

.detail-header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.detail-icon {
  font-size: 36px;
  color: var(--md-primary);
}

.detail-title {
  font-size: 20px;
  font-weight: 500;
  margin: 0;
}

.detail-subtitle {
  font-size: 14px;
  color: var(--md-on-surface-secondary);
}

/* ===== Section ===== */
.section {
  background: var(--md-surface);
  border: 1px solid var(--md-outline);
  border-radius: var(--md-radius-lg);
  overflow: hidden;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--md-outline);
}

.section-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 500;
  margin: 0;
}

.section-title .material-symbols-outlined {
  font-size: 20px;
  color: var(--md-primary);
}

/* ===== Part Table ===== */
.part-table-wrap {
  overflow-x: auto;
}

.part-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.part-table th {
  text-align: left;
  padding: 10px 16px;
  font-weight: 500;
  color: var(--md-on-surface-secondary);
  background: var(--md-surface-variant);
  border-bottom: 1px solid var(--md-outline);
  white-space: nowrap;
}

.part-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--md-outline);
  vertical-align: middle;
}

.part-table tbody tr:hover {
  background: #f8f9fa;
}

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

.part-row-warning {
  background: #fff8e1 !important;
}

.part-name-cell {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.part-name-cell strong {
  font-weight: 500;
}

.part-number {
  font-size: 11px;
  color: var(--md-on-surface-secondary);
  font-family: 'SF Mono', 'Menlo', monospace;
}

.part-actions {
  display: flex;
  align-items: center;
  gap: 2px;
}

/* ===== Percentage Bar ===== */
.pct-bar-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 100px;
}

.pct-bar {
  height: 6px;
  background: var(--md-primary);
  border-radius: 3px;
  transition: width 0.3s;
}

.pct-bar-warning {
  background: var(--md-warning);
}

.pct-label {
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
}

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 20px;
}

.modal-content {
  background: var(--md-surface);
  border-radius: var(--md-radius-lg);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.modal-lg {
  max-width: 640px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 0;
}

.modal-header h3 {
  font-size: 18px;
  font-weight: 500;
  margin: 0;
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  color: var(--md-on-surface-secondary);
  transition: background 0.2s;
}

.modal-close:hover {
  background: var(--md-surface-variant);
}

.modal-content form {
  padding: 20px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding-top: 8px;
}

/* ===== Form Grid ===== */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-field select {
  padding: 14px 16px;
  border: 1px solid var(--md-outline);
  border-radius: var(--md-radius);
  background: var(--md-surface);
  color: var(--md-on-surface);
  font-size: 16px;
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
}

.form-field select:focus {
  outline: none;
  border-color: var(--md-primary);
  box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.2);
}

.form-field select:disabled {
  background: #f1f3f4;
  opacity: 0.7;
  cursor: not-allowed;
}

.form-field input[type="number"] {
  -moz-appearance: textfield;
}

.form-field input[type="number"]::-webkit-outer-spin-button,
.form-field input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .topnav-center {
    display: none;
  }

  .topnav-app-name {
    display: none;
  }

  .machine-grid {
    grid-template-columns: 1fr;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .part-table {
    font-size: 12px;
  }

  .part-table th,
  .part-table td {
    padding: 8px 10px;
  }
}

@media (max-width: 480px) {
  .login-card {
    padding: 32px 24px;
    border-radius: 0;
    border: none;
    box-shadow: none;
    max-width: none;
  }

  .login-container {
    padding: 0;
    background: var(--md-surface);
  }

  .home-header {
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
  }

  .tenant-grid {
    grid-template-columns: 1fr;
  }
}