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

:root {
  --ms-blue: #0078D4;
  --ms-green: #7FBA00;
  --ms-yellow: #FFB900;
  --ms-red: #F25022;
  --ms-orange: #FF8C00;
  --ms-purple: #6264A7;
  --ms-dark: #242424;
  --ms-gray: #605E5C;
  --ms-light-gray: #F5F5F5;
  --ms-border: #E1E1E1;
  --white: #FFFFFF;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --radius: 8px;
  --radius-lg: 12px;
}

body {
  font-family: 'Segoe UI', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--white);
  color: var(--ms-dark);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* === Header === */
.header {
  background: var(--white);
  border-bottom: 1px solid var(--ms-border);
  padding: 24px 0;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

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

.logo h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--ms-dark);
  letter-spacing: -0.02em;
}

.tagline {
  color: var(--ms-gray);
  font-size: 0.95rem;
  margin-top: 4px;
  padding-left: 44px;
}

/* === Main === */
.main {
  flex: 1;
  padding: 48px 0;
}

/* === Tools Grid === */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

/* === Tool Card === */
.tool-card {
  background: var(--white);
  border: 1px solid var(--ms-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
  position: relative;
  overflow: hidden;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--card-color, var(--ms-blue));
}

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

.tool-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
}

.tool-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.tool-icon svg {
  width: 24px;
  height: 24px;
  fill: var(--white);
}

.tool-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ms-dark);
}

.tool-card p {
  color: var(--ms-gray);
  font-size: 0.9rem;
  line-height: 1.5;
  flex: 1;
}

.tool-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--white);
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.15s ease, box-shadow 0.15s ease;
  align-self: flex-start;
}

.tool-btn:hover {
  opacity: 0.9;
  box-shadow: var(--shadow-sm);
}

.tool-btn svg {
  width: 16px;
  height: 16px;
  fill: var(--white);
}

/* === Loading === */
.loading {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 64px 0;
  color: var(--ms-gray);
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--ms-border);
  border-top-color: var(--ms-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* === Empty State === */
.empty-state {
  text-align: center;
  padding: 80px 24px;
  color: var(--ms-gray);
}

.empty-state p {
  margin-top: 16px;
  font-size: 1.1rem;
}

/* === Footer === */
.footer {
  border-top: 1px solid var(--ms-border);
  padding: 24px 0;
  text-align: center;
  color: var(--ms-gray);
  font-size: 0.85rem;
}

/* === Admin Page === */
.admin-login {
  max-width: 400px;
  margin: 80px auto;
  padding: 40px;
  border: 1px solid var(--ms-border);
  border-radius: var(--radius-lg);
  text-align: center;
}

.admin-login h2 {
  margin-bottom: 24px;
  font-size: 1.5rem;
}

.form-group {
  margin-bottom: 16px;
  text-align: left;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ms-dark);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--ms-border);
  border-radius: 6px;
  font-size: 0.9rem;
  font-family: inherit;
  transition: border-color 0.15s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--ms-blue);
  box-shadow: 0 0 0 3px rgba(0, 120, 212, 0.1);
}

.btn {
  padding: 10px 24px;
  border: none;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s ease;
}

.btn:hover {
  opacity: 0.9;
}

.btn-primary {
  background: var(--ms-blue);
  color: var(--white);
}

.btn-danger {
  background: var(--ms-red);
  color: var(--white);
}

.btn-secondary {
  background: var(--ms-light-gray);
  color: var(--ms-dark);
  border: 1px solid var(--ms-border);
}

/* Admin Layout */
.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.admin-header h2 {
  font-size: 1.5rem;
}

.tools-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 32px;
}

.tools-table th,
.tools-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--ms-border);
}

.tools-table th {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ms-gray);
  background: var(--ms-light-gray);
}

.tools-table tr:hover td {
  background: #FAFAFA;
}

.color-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  display: inline-block;
}

.status-badge {
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 600;
}

.status-active {
  background: #E6F4EA;
  color: #1E7E34;
}

.status-inactive {
  background: #FDE8E8;
  color: #C62828;
}

.actions {
  display: flex;
  gap: 8px;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px;
  width: 100%;
  max-width: 520px;
  box-shadow: var(--shadow-lg);
  max-height: 90vh;
  overflow-y: auto;
}

.modal h3 {
  font-size: 1.25rem;
  margin-bottom: 24px;
}

.modal-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 24px;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  border-radius: 8px;
  color: var(--white);
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: var(--shadow-md);
  z-index: 2000;
  animation: slideIn 0.3s ease, fadeOut 0.3s ease 2.7s;
}

.toast-success { background: var(--ms-green); }
.toast-error { background: var(--ms-red); }

@keyframes slideIn {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* === Responsive === */
@media (max-width: 768px) {
  .tools-grid {
    grid-template-columns: 1fr;
  }

  .header-inner {
    padding: 0 16px;
  }

  .tagline {
    padding-left: 0;
  }

  .tools-table {
    font-size: 0.85rem;
  }

  .tools-table th:nth-child(3),
  .tools-table td:nth-child(3) {
    display: none;
  }
}