/* ==============================================
   Subnet Calculator Tool Styles
   Matches existing tool theme (warm cream/beige)
   ============================================== */

.subnet-page-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 15px 40px;
  background: #faf8f5;
  min-height: 100vh;
}

.subnet-tool {
  max-width: 1200px;
  width: 100%;
  padding: 0;
  background: #faf8f5;
}

body:has(.subnet-tool) {
  background: #faf8f5 !important;
}

.subnet-tool .tool-header {
  text-align: center;
  margin-bottom: 24px;
  padding: 40px 30px;
  background: linear-gradient(135deg, #292524 0%, #44403c 100%);
  border-radius: 16px;
  color: #faf8f5;
  box-shadow: 0 4px 20px rgba(41, 37, 36, 0.2);
  position: relative;
  overflow: hidden;
}

.subnet-tool .tool-title {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 2rem;
  font-weight: 800;
  margin: 0 0 8px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: #faf8f5;
  position: relative;
  z-index: 1;
}

.subnet-tool .tool-title i {
  font-size: 1.6rem;
  color: #fef3c7;
  animation: pulse-network 2s ease-in-out infinite;
}

@keyframes pulse-network {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.08); opacity: 0.85; }
}

.subnet-tool .tool-subtitle {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 1rem;
  color: #d6d3d1;
  margin: 0;
  opacity: 0.85;
  position: relative;
  z-index: 1;
}

.subnet-tool .tool-intro {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.95rem;
  color: #57534e;
  line-height: 1.7;
  text-align: center;
  margin: 0 auto 24px;
  padding: 0 16px;
  max-width: 800px;
}

.subnet-tool .tool-intro strong {
  color: #44403c;
}

.subnet-tool .tool-intro code {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
  background: #292524;
  color: #fef3c7;
  padding: 2px 7px;
  border-radius: 4px;
  font-size: 0.88rem;
}

/* Mode Tabs */
.subnet-tool .mode-tabs {
  display: flex;
  margin-bottom: 24px;
  background: #f5f0e8;
  border: 2px solid #e7e0d5;
  border-radius: 12px;
  padding: 4px;
  gap: 4px;
}

.subnet-tool .mode-tab {
  flex: 1;
  padding: 10px 20px;
  border: none;
  background: transparent;
  border-radius: 8px;
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  color: #78716c;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.15s ease;
}

.subnet-tool .mode-tab:hover {
  color: #44403c;
}

.subnet-tool .mode-tab.active {
  background: #fffdf9;
  color: #292524;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.subnet-tool .mode-content {
  display: none;
}

.subnet-tool .mode-content.active {
  display: block;
}

/* Calculator Panel */
.subnet-tool .calculator-main {
  background: #fffdf9;
  border: 2px solid #e7e0d5;
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 24px;
}

.subnet-tool .input-section {
  margin-bottom: 20px;
}

.subnet-tool .input-section > label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: #374151;
  margin-bottom: 8px;
}

.subnet-tool .input-section > label i {
  color: #78716c;
}

.subnet-tool .input-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: stretch;
}

.subnet-tool .input-primary {
  flex: 1;
  min-width: 200px;
  padding: 12px 16px;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
  font-size: 1rem;
  border: 2px solid #e7e0d5;
  border-radius: 10px;
  background: #292524;
  color: #fef3c7;
  outline: none;
  transition: border-color 0.15s ease;
}

.subnet-tool .input-primary:focus {
  border-color: #78716c;
}

.subnet-tool .input-primary::placeholder {
  color: #57534e;
}

.subnet-tool .cidr-controls {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 140px;
}

.subnet-tool .cidr-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.subnet-tool .cidr-label {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  color: #57534e;
  white-space: nowrap;
}

.subnet-tool .cidr-select {
  padding: 8px 10px;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
  font-size: 0.95rem;
  font-weight: 700;
  border: 2px solid #e7e0d5;
  border-radius: 8px;
  background: #fffdf9;
  color: #292524;
  cursor: pointer;
  min-width: 72px;
}

.subnet-tool .cidr-slider {
  width: 100%;
  accent-color: #44403c;
  cursor: pointer;
}

.subnet-tool .mask-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.subnet-tool .mask-row label {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  color: #57534e;
}

.subnet-tool .mask-input {
  flex: 1;
  min-width: 160px;
  max-width: 200px;
  padding: 8px 12px;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
  font-size: 0.9rem;
  border: 2px solid #e7e0d5;
  border-radius: 8px;
  background: #f5f0e8;
  color: #292524;
  outline: none;
}

.subnet-tool .mask-input:focus {
  border-color: #78716c;
  background: #fffdf9;
}

.subnet-tool .input-error {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.85rem;
  color: #b91c1c;
  margin-top: 8px;
  padding: 8px 12px;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 8px;
}

.subnet-tool .input-error[hidden] {
  display: none;
}

/* Presets */
.subnet-tool .presets-section {
  margin-bottom: 20px;
}

.subnet-tool .presets-label {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  color: #57534e;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.subnet-tool .presets-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.subnet-tool .preset-chip {
  padding: 6px 14px;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
  font-size: 0.85rem;
  font-weight: 600;
  background: #f5f0e8;
  border: 2px solid #e7e0d5;
  border-radius: 20px;
  color: #44403c;
  cursor: pointer;
  transition: all 0.15s ease;
}

.subnet-tool .preset-chip:hover {
  background: #292524;
  color: #fef3c7;
  border-color: #292524;
}

/* Results Grid */
.subnet-tool .results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.subnet-tool .result-card {
  background: #f5f0e8;
  border: 2px solid #e7e0d5;
  border-radius: 10px;
  padding: 12px 14px;
  position: relative;
}

.subnet-tool .result-card-wide {
  grid-column: 1 / -1;
}

.subnet-tool .result-label {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: #78716c;
  margin-bottom: 4px;
}

.subnet-tool .result-value {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
  font-size: 0.95rem;
  font-weight: 600;
  color: #292524;
  word-break: break-all;
  padding-right: 32px;
}

.subnet-tool .result-value.result-placeholder {
  color: #a8a29e;
  font-weight: 500;
}

.subnet-tool .result-value.result-error {
  color: #b91c1c;
}

.subnet-tool .btn-copy-result {
  position: absolute;
  top: 10px;
  right: 10px;
  background: transparent;
  border: 1px solid #d6cfc4;
  color: #78716c;
  padding: 4px 8px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.75rem;
  transition: all 0.15s ease;
}

.subnet-tool .btn-copy-result:hover {
  background: #292524;
  color: #fef3c7;
  border-color: #292524;
}

/* Split Subnet */
.subnet-tool .split-section {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 2px solid #e7e0d5;
}

.subnet-tool .split-section h4 {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: #374151;
  margin: 0 0 12px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.subnet-tool .split-section h4 i {
  color: #78716c;
}

.subnet-tool .split-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.subnet-tool .split-controls label {
  font-size: 0.85rem;
  font-weight: 600;
  color: #57534e;
}

.subnet-tool .split-results {
  overflow-x: auto;
}

.subnet-tool .split-results[hidden] {
  display: none;
}

.subnet-tool .split-table {
  width: 100%;
  border-collapse: collapse;
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.85rem;
}

.subnet-tool .split-table th,
.subnet-tool .split-table td {
  padding: 8px 12px;
  text-align: left;
  border-bottom: 1px solid #e7e0d5;
}

.subnet-tool .split-table th {
  background: #f5f0e8;
  font-weight: 600;
  color: #374151;
  font-size: 0.78rem;
  text-transform: uppercase;
}

.subnet-tool .split-table code {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
  background: #292524;
  color: #fef3c7;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.82rem;
}

/* Reference / FAQ / Guide - shared with chmod pattern */
.subnet-tool .reference-section {
  margin-bottom: 32px;
}

.subnet-tool .reference-section h3 {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: #374151;
  margin: 0 0 16px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.subnet-tool .reference-section h3 i {
  color: #059669;
}

.subnet-tool .reference-table-wrapper {
  background: #fffdf9;
  border: 2px solid #e7e0d5;
  border-radius: 12px;
  overflow-x: auto;
}

.subnet-tool .cidr-table {
  width: 100%;
  border-collapse: collapse;
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.85rem;
}

.subnet-tool .cidr-table th,
.subnet-tool .cidr-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid #e7e0d5;
}

.subnet-tool .cidr-table th {
  background: #f5f0e8;
  font-weight: 600;
  color: #374151;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: sticky;
  top: 0;
}

.subnet-tool .cidr-table td {
  color: #57534e;
}

.subnet-tool .cidr-table code {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
  font-size: 0.85rem;
  background: #292524;
  color: #fef3c7;
  padding: 3px 8px;
  border-radius: 4px;
}

.subnet-tool .cidr-table .cidr-example-row {
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.subnet-tool .cidr-table .cidr-example-row:hover {
  background: #f5f0e8;
}

.subnet-tool .table-hint {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.8rem;
  color: #a8a29e;
  text-align: center;
  margin: 12px 0 0 0;
}

.subnet-tool .table-hint i {
  margin-right: 4px;
}

.subnet-tool .examples-intro {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.9rem;
  color: #57534e;
  margin: 0 0 12px 0;
  line-height: 1.6;
}

.subnet-tool .syntax-guide-section {
  margin-bottom: 32px;
}

.subnet-tool .syntax-guide-section > h3 {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: #374151;
  margin: 0 0 16px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.subnet-tool .syntax-guide-section > h3 i {
  color: #7c3aed;
}

.subnet-tool .syntax-guide-content {
  background: #fffdf9;
  border: 2px solid #e7e0d5;
  border-radius: 12px;
  overflow: hidden;
}

.subnet-tool .guide-article {
  padding: 24px 28px;
  border-bottom: 1px solid #e7e0d5;
}

.subnet-tool .guide-article:last-child {
  border-bottom: none;
}

.subnet-tool .guide-article h2 {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: #292524;
  margin: 0 0 12px 0;
}

.subnet-tool .guide-article p {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.9rem;
  color: #57534e;
  line-height: 1.7;
  margin: 0 0 12px 0;
}

.subnet-tool .guide-article code {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
  background: #292524;
  color: #fef3c7;
  padding: 2px 7px;
  border-radius: 4px;
  font-size: 0.85rem;
}

.subnet-tool .guide-article ul {
  list-style: none;
  margin: 10px 0;
  padding-left: 0;
}

.subnet-tool .guide-article li {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.9rem;
  color: #57534e;
  line-height: 1.7;
  padding: 8px 0 8px 20px;
  position: relative;
  border-bottom: 1px solid #f5f0e8;
}

.subnet-tool .guide-article li::before {
  content: "•";
  color: #059669;
  font-weight: bold;
  position: absolute;
  left: 0;
}

.subnet-tool .guide-article li strong {
  color: #292524;
}

.subnet-tool .faq-section {
  margin-bottom: 32px;
  padding: 30px;
  background: #f5f0e8;
  border-radius: 16px;
  border: 2px solid #e7e0d5;
}

.subnet-tool .faq-section > h2 {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: #374151;
  margin: 0 0 24px 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.subnet-tool .faq-section > h2 i {
  color: #78716c;
}

.subnet-tool .faq-item {
  background: #fffdf9;
  border: 2px solid #e7e0d5;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 12px;
}

.subnet-tool .faq-item:last-child {
  margin-bottom: 0;
}

.subnet-tool .faq-item h3 {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: #292524;
  margin: 0 0 10px 0;
}

.subnet-tool .faq-item p {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.9rem;
  color: #78716c;
  line-height: 1.6;
  margin: 0;
}

.subnet-tool .faq-item code {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
  background: #292524;
  color: #fef3c7;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85rem;
}

@media (max-width: 768px) {
  .subnet-tool .tool-title {
    font-size: 1.5rem;
    flex-direction: column;
    gap: 8px;
  }

  .subnet-tool .tool-header {
    padding: 28px 20px;
  }

  .subnet-tool .input-row {
    flex-direction: column;
  }

  .subnet-tool .cidr-controls {
    width: 100%;
  }

  .subnet-tool .results-grid {
    grid-template-columns: 1fr;
  }

  .subnet-tool .calculator-main {
    padding: 16px;
  }

  .subnet-tool .faq-section {
    padding: 20px 16px;
  }
}