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

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface-hover: #222633;
  --border: #2a2e3d;
  --primary: #6c5ce7;
  --primary-light: #a29bfe;
  --accent-green: #00cec9;
  --accent-orange: #fdcb6e;
  --accent-red: #ff7675;
  --text: #e4e6eb;
  --text-dim: #8b8fa3;
  --text-bright: #ffffff;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background: linear-gradient(135deg, #1a1d27 0%, #2d1b69 100%);
  border-bottom: 1px solid var(--border);
  padding: 40px 0 36px;
  text-align: center;
}

header h1 {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 6px;
}

header h1 .icon {
  color: var(--primary-light);
}

/* Domain nav links */
.domain-nav {
  margin-top: 14px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
}

.domain-link {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 16px;
  border: 1px solid transparent;
  transition: all 0.2s;
}

.domain-link:hover {
  color: var(--text);
  border-color: var(--border);
}

.domain-link.active {
  color: var(--primary-light);
  border-color: var(--primary);
  background: rgba(108, 92, 231, 0.15);
}

.nav-sep {
  color: var(--border);
  font-size: 0.8rem;
}

/* Domain-specific theme overrides */
body.theme-v4 {
  --primary: #6c5ce7;
  --primary-light: #a29bfe;
}

body.theme-v6 {
  --primary: #00b894;
  --primary-light: #55efc4;
}

body.theme-v4 header {
  background: linear-gradient(135deg, #1a1d27 0%, #2d1b69 100%);
}

body.theme-v6 header {
  background: linear-gradient(135deg, #1a1d27 0%, #0a3d2e 100%);
}

body.theme-v6 .your-ip {
  border-color: var(--primary);
}

.tagline {
  color: var(--text-dim);
  font-size: 1.05rem;
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin: 24px 0;
  box-shadow: var(--shadow);
}

.card h2 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-bright);
  margin-bottom: 6px;
}

.card-desc {
  color: var(--text-dim);
  font-size: 0.92rem;
  margin-bottom: 18px;
}

/* Your IP Section */
.your-ip {
  text-align: center;
  border-color: var(--primary);
  border-width: 2px;
}

.ip-display {
  margin: 20px 0 12px;
}

.ip-result {
  font-size: 1.8rem;
  font-weight: 700;
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  color: var(--accent-green);
  word-break: break-all;
}

.ip-badges {
  margin-top: 12px;
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-ipv4 {
  background: rgba(108, 92, 231, 0.2);
  color: var(--primary-light);
  border: 1px solid var(--primary);
}

.badge-ipv6 {
  background: rgba(0, 206, 201, 0.2);
  color: var(--accent-green);
  border: 1px solid var(--accent-green);
}

.badge-private {
  background: rgba(253, 203, 110, 0.2);
  color: var(--accent-orange);
  border: 1px solid var(--accent-orange);
}

.badge-public {
  background: rgba(0, 206, 201, 0.15);
  color: var(--accent-green);
  border: 1px solid rgba(0, 206, 201, 0.5);
}

.ip-details {
  margin-top: 12px;
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* Spinner */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--border);
  border-top-color: var(--primary-light);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  vertical-align: middle;
  margin-right: 8px;
}

.spinner.hidden {
  display: none;
}

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

/* Input Group */
.input-group {
  display: flex;
  gap: 10px;
}

.input-group input, #cidr-input, #convert-input, #range-ip, #range-start, #range-end {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--text);
  font-size: 1rem;
  font-family: 'SF Mono', 'Fira Code', monospace;
  outline: none;
  transition: border-color 0.2s;
}

.input-group input:focus, input:focus {
  border-color: var(--primary);
}

button {
  background: var(--primary);
  color: var(--text-bright);
  border: none;
  border-radius: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  white-space: nowrap;
}

button:hover {
  background: var(--primary-light);
  color: var(--bg);
}

button:active {
  transform: scale(0.97);
}

/* Range inputs */
.range-inputs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.range-inputs .input-group {
  flex: 1;
  min-width: 150px;
}

.range-inputs button {
  align-self: flex-start;
  margin-top: 0;
}

/* Generator controls */
.gen-controls {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.gen-controls label {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.92rem;
  cursor: pointer;
  color: var(--text-dim);
}

.gen-controls input[type="radio"] {
  accent-color: var(--primary);
}

.gen-controls select {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  color: var(--text);
  font-size: 0.92rem;
  outline: none;
  cursor: pointer;
}

/* Result Box */
.result-box {
  margin-top: 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  animation: fadeIn 0.3s ease;
}

.result-box.hidden {
  display: none;
}

.result-box.error {
  border-color: var(--accent-red);
}

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

/* Result Table */
.result-table {
  width: 100%;
  border-collapse: collapse;
}

.result-table tr {
  border-bottom: 1px solid var(--border);
}

.result-table tr:last-child {
  border-bottom: none;
}

.result-table td {
  padding: 8px 0;
  vertical-align: top;
}

.result-table td:first-child {
  color: var(--text-dim);
  font-size: 0.88rem;
  width: 160px;
  padding-right: 16px;
  font-weight: 500;
}

.result-table td:last-child {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.92rem;
  word-break: break-all;
  color: var(--text);
}

.result-label {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-bottom: 2px;
}

.result-value {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.95rem;
  margin-bottom: 12px;
  word-break: break-all;
}

.result-value.success {
  color: var(--accent-green);
}

.result-value.fail {
  color: var(--accent-red);
}

/* Generated IPs list */
.gen-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.gen-list li {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.92rem;
  padding: 6px 12px;
  background: var(--surface);
  border-radius: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.gen-list .badge {
  font-size: 0.7rem;
  padding: 2px 8px;
}

/* Category headers */
.category-header {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--primary-light);
  padding: 32px 0 8px;
  margin-top: 16px;
  border-bottom: 1px solid var(--border);
}

/* Note labels */
.note {
  color: var(--accent-orange);
  font-size: 0.82rem;
}

/* Textareas */
textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--text);
  font-size: 0.9rem;
  font-family: 'SF Mono', 'Fira Code', monospace;
  outline: none;
  resize: vertical;
  transition: border-color 0.2s;
}

textarea:focus {
  border-color: var(--primary);
}

/* Select styling (for new tools) */
select {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  color: var(--text);
  font-size: 0.92rem;
  outline: none;
  cursor: pointer;
}

/* Regex controls */
.regex-controls {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}

.regex-controls select {
  min-width: 180px;
}

.regex-controls input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  color: var(--text);
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.9rem;
  outline: none;
}

.regex-controls input:focus {
  border-color: var(--primary);
}

/* Mask visualizer binary grid */
.mask-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.8rem;
  margin-top: 12px;
}

.mask-bit {
  width: 18px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 3px;
}

.mask-bit.one {
  background: rgba(108, 92, 231, 0.3);
  color: var(--primary-light);
}

.mask-bit.zero {
  background: rgba(139, 143, 163, 0.1);
  color: var(--text-dim);
}

.mask-sep {
  width: 6px;
}

/* Bulk result rows */
.bulk-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 5px 10px;
  border-radius: 5px;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.88rem;
  margin-bottom: 3px;
}

.bulk-row.valid {
  background: rgba(0, 206, 201, 0.08);
}

.bulk-row.invalid {
  background: rgba(255, 118, 117, 0.08);
}

.bulk-row .ip-text {
  word-break: break-all;
}

.bulk-row .bulk-info {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-shrink: 0;
  margin-left: 10px;
}

/* Diff table */
.diff-table {
  width: 100%;
  border-collapse: collapse;
}

.diff-table th {
  text-align: left;
  color: var(--text-dim);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 8px;
  border-bottom: 1px solid var(--border);
}

.diff-table td {
  padding: 6px 8px;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.88rem;
  word-break: break-all;
  border-bottom: 1px solid var(--border);
}

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

.diff-match {
  color: var(--accent-green);
}

.diff-mismatch {
  color: var(--accent-orange);
}

/* Headers table */
.headers-table td:first-child {
  white-space: nowrap;
}

/* WebRTC results */
.leak-found {
  color: var(--accent-red);
  font-weight: 600;
}

.no-leak {
  color: var(--accent-green);
  font-weight: 600;
}

/* Loading state for buttons */
button.loading {
  opacity: 0.7;
  pointer-events: none;
}

/* Footer */
footer {
  text-align: center;
  padding: 32px 0;
  color: var(--text-dim);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}

.footer-credit {
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.footer-credit a {
  color: var(--primary-light);
  text-decoration: none;
}

.footer-credit a:hover {
  text-decoration: underline;
}

.terminal-output {
  background: #0a0c10;
  color: #c9d1d9;
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
  font-size: 0.8rem;
  line-height: 1.5;
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow-x: auto;
  white-space: pre;
  margin: 0;
}

/* Responsive */
@media (max-width: 600px) {
  header h1 {
    font-size: 1.8rem;
  }

  .ip-result {
    font-size: 1.2rem;
  }

  .card {
    padding: 20px;
  }

  .input-group {
    flex-direction: column;
  }

  .range-inputs {
    flex-direction: column;
  }

  .result-table td:first-child {
    width: 120px;
  }

  .regex-controls {
    flex-direction: column;
  }

  .diff-table {
    font-size: 0.78rem;
  }
}