:root {
  --bg-void: #03070c;
  --bg-deep: #07111c;
  --surface-panel: #091521;
  --surface-panel-raised: #0d1d2c;
  --line-default: #73cdff3d;
  --line-strong: #96e1ff85;
  --text-bright: #e9fbff;
  --text-primary: #dff8ff;
  --text-soft: #9fd5e7;
  --text-dim: #7da6b7;
  --contact-light: #78d2ff;
  --success: #a0ffb8;
  --danger: #ffb0b0;

  --display-font: 'Orbitron', system-ui, sans-serif;
  --body-font: 'Electrolize', system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg-void);
  color: var(--text-primary);
  font-family: var(--body-font);
}

.ufn-scanlines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(120, 210, 255, 0.02) 0px,
    rgba(120, 210, 255, 0.02) 1px,
    transparent 1px,
    transparent 3px
  );
}

.ufn-page {
  position: relative;
  z-index: 1;
  max-width: min(1600px, 96vw);
  margin: 0 auto;
  padding: 28px clamp(20px, 3vw, 48px) 56px;
}

.ufn-header {
  margin-bottom: 24px;
}

.ufn-kicker {
  font-family: var(--display-font);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: rgba(120, 210, 255, 0.5);
  margin: 0 0 6px;
}

.ufn-page-title {
  font-family: var(--display-font);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 3px;
  line-height: 1.1;
  text-transform: uppercase;
  color: var(--text-bright);
  margin: 0;
}

.ufn-panel {
  background: rgba(12, 26, 42, 0.96);
  border-radius: 24px;
  padding: 22px;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.05) inset,
    0 20px 48px rgba(0, 0, 0, 0.45),
    0 0 0 1px rgba(130, 220, 255, 0.06) inset;
  margin-bottom: 20px;
}

.ufn-panel-nested {
  background: rgba(8, 20, 34, 0.85);
  border-radius: 16px;
  padding: 16px 18px;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.03) inset,
    0 8px 20px rgba(0, 0, 0, 0.35);
}

.ufn-panel-label {
  font-family: var(--display-font);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-soft);
  margin: 0 0 16px;
}

.ufn-panel-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.ufn-panel-header-row .ufn-panel-label {
  margin: 0;
}

.ufn-field-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
  max-width: 720px;
}

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

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

.ufn-label {
  font-family: var(--display-font);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-dim);
}

.ufn-input {
  background: #0a1623;
  border: 1px solid rgba(120, 210, 255, 0.24);
  border-radius: 12px;
  padding: 11px 14px;
  font-family: var(--display-font);
  font-size: 13px;
  color: var(--text-primary);
  width: 100%;
}

.ufn-input:focus-visible {
  outline: 2px solid rgba(120, 210, 255, 0.85);
  outline-offset: 2px;
}

.ufn-input:focus {
  border-color: rgba(120, 210, 255, 0.5);
}

.ufn-input.ufn-code {
  font-family: ui-monospace, 'SF Mono', monospace;
  font-size: 12.5px;
  letter-spacing: 0.3px;
  color: var(--contact-light);
  background: #08131f;
}

.ufn-toggle-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.ufn-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(10, 20, 32, 0.6);
  border: 1px solid rgba(120, 210, 255, 0.18);
  border-radius: 9999px;
  padding: 8px 16px 8px 8px;
  cursor: pointer;
  color: var(--text-soft);
  font-family: var(--display-font);
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.ufn-toggle-track {
  width: 32px;
  height: 18px;
  border-radius: 9999px;
  background: rgba(120, 210, 255, 0.12);
  border: 1px solid rgba(120, 210, 255, 0.28);
  position: relative;
  transition: background-color 0.15s ease, border-color 0.15s ease;
  flex: none;
}

.ufn-toggle-knob {
  position: absolute;
  top: 1px;
  left: 1px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--text-dim);
  transition: transform 0.15s ease, background-color 0.15s ease;
}

.ufn-toggle[data-on="true"] {
  border-color: rgba(120, 210, 255, 0.4);
  color: var(--text-bright);
}

.ufn-toggle[data-on="true"] .ufn-toggle-track {
  background: rgba(120, 210, 255, 0.28);
  border-color: rgba(120, 210, 255, 0.6);
}

.ufn-toggle[data-on="true"] .ufn-toggle-knob {
  transform: translateX(14px);
  background: var(--contact-light);
  box-shadow: 0 0 8px rgba(120, 210, 255, 0.7);
}

.ufn-toggle:focus-visible {
  outline: 2px solid rgba(120, 210, 255, 0.85);
  outline-offset: 2px;
}

.ufn-btn {
  font-family: var(--display-font);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  border-radius: 12px;
  padding: 11px 20px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.08s ease, box-shadow 0.15s ease;
}

.ufn-btn:active {
  transform: scale(0.96);
}

.ufn-btn-secondary {
  background: rgba(10, 20, 32, 0.6);
  border-color: rgba(120, 210, 255, 0.18);
  color: var(--text-soft);
}

.ufn-btn-secondary:hover {
  box-shadow: 0 0 0 1px rgba(120, 210, 255, 0.28) inset;
}

.ufn-btn-primary {
  background: rgba(20, 60, 110, 0.85);
  border-color: rgba(100, 180, 255, 0.4);
  color: #d8f3ff;
  padding: 11px 16px;
}

.ufn-btn-primary:hover {
  box-shadow: 0 0 16px rgba(100, 180, 255, 0.35);
}

.ufn-btn-primary.copied {
  background: rgba(20, 80, 40, 0.85);
  border-color: rgba(160, 255, 184, 0.5);
  color: var(--success);
}

.ufn-btn-danger {
  background: rgba(60, 10, 10, 0.85);
  border-color: rgba(220, 80, 80, 0.38);
  color: var(--danger);
  padding: 8px 12px;
  font-size: 14px;
  line-height: 1;
}

.ufn-btn-danger:hover {
  box-shadow: 0 0 12px rgba(220, 80, 80, 0.3);
}

.ufn-rows-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: 12px 20px;
  align-items: start;
}

.ufn-row {
  display: grid;
  grid-template-columns: 1fr 2fr auto;
  gap: 14px;
  align-items: end;
}

@media (max-width: 640px) {
  .ufn-rows-grid {
    grid-template-columns: 1fr;
  }
  .ufn-row {
    grid-template-columns: 1fr;
    align-items: stretch;
  }
  .ufn-row .remove-row {
    justify-self: flex-end;
  }
}

.ufn-row-input, .ufn-row-output {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

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

.ufn-output-row .link-output {
  flex: 1;
  min-width: 0;
}

.ufn-footer {
  margin-top: 32px;
  text-align: center;
}