:root {
  /* Ink-tinted dark neutral ramp */
  --bg-deep: #07080d;
  --bg-main: #0b0d14;
  --bg-card: #11141c;
  --bg-elevated: #1a1e28;

  /* Hairlines & borders */
  --border: rgba(238, 240, 245, 0.08);
  --border-strong: rgba(238, 240, 245, 0.14);
  --border-focus: #38bdf8;

  /* 3 Text roles */
  --text-primary: #eef0f5;
  --text-secondary: #a3a9b8;
  --text-muted: #7a8296;

  /* Single accent + toned semantic colors */
  --accent: #38bdf8;
  --accent-hover: #5cc9fa;
  --accent-ink: #07080d;
  --success: #4cc38a;
  --warning: #e5a93c;
  --danger: #e5484d;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SFMono-Regular', Consolas, monospace;

  /* Motion */
  --ease: cubic-bezier(0.2, 0, 0, 1);
}

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

body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Focus visibility */
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
a:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

/* Header */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 24px;
  min-height: 64px;
  background-color: var(--bg-deep);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
  flex-wrap: wrap;
  gap: 16px;
}

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

.logo-badge {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.topbar h1 {
  font-size: 16px;
  font-weight: 500;
  line-height: 1.25;
  color: var(--text-primary);
}

.subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.topbar-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* Container */
.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 20px 24px 48px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Stats Strip */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.stat-pill {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-label {
  font-size: 12px;
  font-weight: 400;
  color: var(--text-muted);
}

.stat-value {
  font-size: 20px;
  font-weight: 500;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
  color: var(--text-primary);
}

.stat-value.highlight { color: var(--accent); }
.stat-value.success { color: var(--success); }
.stat-value.warning { color: var(--warning); }
.stat-value.info { color: var(--text-primary); }

/* Workspace Grid */
.workspace-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 20px;
}

@media (max-width: 1100px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }
}

/* Cards */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.card-header h2 {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
}

.helper-text {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.helper-text code {
  background-color: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-primary);
}

/* Textareas */
.code-textarea {
  width: 100%;
  background-color: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  resize: vertical;
  outline: none;
  transition: border-color 150ms var(--ease);
}

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

.output-area {
  min-height: 224px;
  color: var(--text-primary);
}

/* Controls Panel */
.controls-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-top: 4px;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.control-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}

.segmented-control {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  background-color: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px;
}

.seg-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-sans);
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 150ms var(--ease), color 150ms var(--ease), border-color 150ms var(--ease);
}

.seg-btn:hover {
  color: var(--text-primary);
}

.seg-btn.active {
  background-color: var(--bg-elevated);
  border-color: var(--border-strong);
  color: var(--text-primary);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.control-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

@media (max-width: 600px) {
  .control-row {
    grid-template-columns: 1fr;
  }
}

.control-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.control-field label {
  font-size: 13px;
  color: var(--text-secondary);
}

.control-field input,
.url-input-group input,
.search-box input,
.form-field input,
.form-field select,
.modal-preview input {
  background-color: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  height: 36px;
  color: var(--text-primary);
  font-size: 13px;
  font-family: var(--font-sans);
  outline: none;
  transition: border-color 150ms var(--ease);
}

.control-field input:focus,
.url-input-group input:focus,
.search-box input:focus,
.form-field input:focus,
.form-field select:focus {
  border-color: var(--border-focus);
}

.checkbox-row {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 36px;
  padding: 0 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 150ms var(--ease), border-color 150ms var(--ease), color 150ms var(--ease), transform 100ms var(--ease);
}

.btn:active {
  transform: scale(0.99);
}

.btn .icon {
  flex-shrink: 0;
}

.btn-block {
  width: 100%;
  height: 40px;
}

.btn-sm {
  height: 32px;
  padding: 0 12px;
  font-size: 12px;
}

.btn-primary {
  background-color: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
}

.btn-secondary {
  background-color: var(--bg-elevated);
  border-color: var(--border-strong);
  color: var(--text-primary);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.btn-secondary:hover {
  background-color: #222836;
  border-color: rgba(238, 240, 245, 0.22);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.btn-outline:hover {
  background-color: var(--bg-elevated);
}

.btn-ghost {
  background-color: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  color: var(--text-primary);
  background-color: var(--bg-elevated);
}

.btn-hiddify,
.btn-v2ray {
  background-color: var(--bg-elevated);
  border-color: var(--border-strong);
  color: var(--text-primary);
  flex: 1;
}

.btn-hiddify:hover,
.btn-v2ray:hover {
  background-color: #222836;
  border-color: rgba(238, 240, 245, 0.22);
}

/* Signature Live/Static Status Dot */
.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  background-color: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 6px;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--text-muted);
  flex-shrink: 0;
}

.status-dot.is-live {
  background-color: var(--success);
}

.status-dot.is-static {
  background-color: var(--accent);
}

/* Subscription URLs & QR */
.sub-box {
  display: grid;
  grid-template-columns: 1fr 200px;
  gap: 16px;
  background-color: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}

@media (max-width: 720px) {
  .sub-box {
    grid-template-columns: 1fr;
  }
}

.sub-links-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.url-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.url-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
}

.url-hint {
  font-size: 12px;
  color: var(--text-muted);
}

.url-input-group {
  display: flex;
  gap: 8px;
}

.url-input-group input {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
}

.deeplink-row {
  display: flex;
  gap: 8px;
  margin-top: 4px;
  flex-wrap: wrap;
}

.qr-col {
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-card {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: 100%;
}

.qr-svg-wrap {
  width: 168px;
  height: 168px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-svg-wrap svg {
  width: 100%;
  height: 100%;
  display: block;
}

.qr-caption {
  font-size: 11px;
  font-weight: 500;
  color: #11141c;
  text-align: center;
  word-break: break-word;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  border: 1px solid var(--border);
}

.badge-singbox {
  background-color: rgba(76, 195, 138, 0.12);
  color: var(--success);
  border-color: rgba(76, 195, 138, 0.24);
}

.badge-xray {
  background-color: rgba(229, 169, 60, 0.12);
  color: var(--warning);
  border-color: rgba(229, 169, 60, 0.24);
}

.badge-json {
  background-color: rgba(56, 189, 248, 0.12);
  color: var(--accent);
  border-color: rgba(56, 189, 248, 0.24);
}

.badge-proto {
  background-color: var(--bg-elevated);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 11px;
}

.badge-fix {
  background-color: var(--bg-elevated);
  color: var(--text-secondary);
}

/* Output Tabs */
.output-tabs-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.tabs-nav {
  display: flex;
  gap: 4px;
  background-color: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px;
  flex-wrap: wrap;
}

.tab-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: background-color 150ms var(--ease), color 150ms var(--ease), border-color 150ms var(--ease);
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  background-color: var(--bg-elevated);
  border-color: var(--border-strong);
  color: var(--text-primary);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

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

/* Nodes Inspector Table */
.search-box input {
  width: 260px;
}

.table-responsive {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  background-color: var(--bg-deep);
}

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

.nodes-table th {
  text-align: left;
  padding: 10px 12px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.nodes-table td {
  padding: 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.nodes-table tbody tr {
  transition: background-color 120ms var(--ease);
}

.nodes-table tbody tr:hover {
  background-color: var(--bg-elevated);
}

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

.mono-cell {
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.sub-detail {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

.row-actions {
  display: flex;
  gap: 6px;
}

.empty-state {
  text-align: center;
  padding: 32px 16px;
  color: var(--text-muted);
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(7, 8, 13, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 100;
}

.modal-backdrop.hidden {
  display: none;
}

.modal {
  background-color: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  width: 100%;
  max-width: 680px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
}

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

.modal-header h3 {
  font-size: 15px;
  font-weight: 500;
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

@media (max-width: 560px) {
  .form-grid {
    grid-template-columns: 1fr;
  }
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-field.span-2 {
  grid-column: span 2;
}

@media (max-width: 560px) {
  .form-field.span-2 {
    grid-column: span 1;
  }
}

.form-field label,
.modal-preview label {
  font-size: 12px;
  color: var(--text-secondary);
}

.modal-preview {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.modal-preview input {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
}

.modal-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  z-index: 200;
  transition: opacity 150ms var(--ease), transform 150ms var(--ease);
}

.toast.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
}