.protocol-indicator {
  display: none !important;
  position: fixed;
  left: 36px;
  bottom: 32px;
  right: auto;
  z-index: 120;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--line-strong, #333);
  padding: 8px 14px;
  background: color-mix(in srgb, var(--panel, #0c0e14) 88%, transparent);
  color: var(--ink, #f4f7f8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  text-align: left;
  cursor: pointer;
  clip-path: var(--notch);
  transition: border-color .3s, transform .2s, box-shadow .3s;
}

.protocol-indicator:hover {
  border-color: var(--signal-text, #d6ff73);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 0, 0, .4), 0 0 16px color-mix(in srgb, var(--signal, #d6ff73) 25%, transparent);
}

.protocol-indicator::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--signal-text, #d6ff73);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  box-shadow: 0 0 10px var(--signal-text, #d6ff73);
  animation: protocol-pulse 2.2s ease-in-out infinite;
}

@keyframes protocol-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .4; transform: scale(.75); }
}

.protocol-indicator[data-state="idle"]::before {
  background: var(--ink-faint, #666);
  box-shadow: none;
  animation: none;
}

.protocol-indicator[data-state="online"]::before {
  background: var(--cyan, #78d7e3);
  box-shadow: 0 0 12px var(--cyan, #78d7e3);
}

.protocol-indicator > div {
  display: grid;
  gap: 2px;
}

.protocol-indicator span {
  display: block;
  font: 500 var(--fs-micro)/1 var(--font-mono, monospace);
  letter-spacing: .24em;
  color: var(--ink-faint, #8d96a0);
  text-transform: uppercase;
}

.protocol-indicator b {
  display: block;
  font: 600 11px/1.2 var(--font-mono, monospace);
  letter-spacing: .12em;
  color: var(--ink, #f4f7f8);
}

.platform-utility-dock {
  display: contents;
}

/* Modal Shell */
.protocol-dialog {
  width: min(840px, calc(100vw - 32px));
  max-height: min(88vh, 800px);
  margin: auto;
  border: 1px solid var(--line-strong, #333);
  padding: 0;
  background: var(--bg, #08090d);
  color: var(--ink, #f4f7f8);
  clip-path: var(--notch);
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(0, 0, 0, .7), 0 0 0 1px color-mix(in srgb, var(--signal, #d6ff73) 15%, transparent);
}

.protocol-dialog::backdrop {
  background: rgba(3, 5, 10, .82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.protocol-shell {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  height: 100%;
  max-height: min(88vh, 800px);
  padding: clamp(20px, 3.5vw, 36px);
  box-sizing: border-box;
  overflow-y: auto;
  overscroll-behavior: contain;
}

/* Header */
.protocol-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line, #222);
}

.protocol-head small {
  display: block;
  font: 500 var(--fs-micro)/1 var(--font-mono, monospace);
  letter-spacing: .28em;
  color: var(--signal-text, #d6ff73);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.protocol-head h2 {
  margin: 0;
  font: 600 clamp(20px, 2.5vw, 26px)/1.2 var(--font-serif, serif);
  color: var(--ink, #f4f7f8);
}

.protocol-close {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  background: transparent;
  border: 1px solid var(--line, #333);
  color: var(--ink-dim, #888);
  cursor: pointer;
  transition: color .2s, border-color .2s;
  font-size: 20px;
}

.protocol-close:hover {
  color: var(--ink, #fff);
  border-color: var(--line-strong, #666);
}

/* Progress Step Tracker */
.protocol-progress {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin: 18px 0;
}

.protocol-progress-step {
  display: grid;
  gap: 6px;
}

.protocol-progress-step i {
  height: 3px;
  background: var(--line, #333);
  transition: background-color .4s;
}

.protocol-progress-step span {
  font: 500 var(--fs-micro)/1 var(--font-mono, monospace);
  letter-spacing: .12em;
  color: var(--ink-faint, #666);
  text-transform: uppercase;
}

.protocol-progress-step.is-complete i {
  background: var(--signal-text, #d6ff73);
}

.protocol-progress-step.is-complete span {
  color: var(--signal-text, #d6ff73);
}

.protocol-progress-step.is-active i {
  background: var(--cyan, #78d7e3);
  box-shadow: 0 0 8px var(--cyan, #78d7e3);
}

.protocol-progress-step.is-active span {
  color: var(--cyan, #78d7e3);
}

/* Stage Workspace */
.protocol-stage {
  min-height: 280px;
  padding: 12px 0 24px;
  display: grid;
  align-content: start;
}

.platform-kicker {
  font: 500 var(--fs-micro)/1 var(--font-mono, monospace);
  letter-spacing: .3em;
  color: var(--signal-text, #d6ff73);
  margin-bottom: 8px;
}

.protocol-stage h3 {
  font: 600 22px/1.3 var(--font-serif, serif);
  margin: 0 0 8px;
  color: var(--ink, #f4f7f8);
}

.protocol-stage > p {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-dim, #a0abb6);
  max-width: 580px;
  margin: 0 0 20px;
}

/* Receiver Stage (Step 1) */
.protocol-receiver-visual {
  display: grid;
  place-items: center;
  padding: 30px 0;
  position: relative;
}

.protocol-antenna-ring {
  width: 140px;
  height: 140px;
  border: 1px dashed var(--line-strong, #444);
  border-radius: 50%;
  display: grid;
  place-items: center;
  position: relative;
  animation: protocol-radar-spin 20s linear infinite;
}

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

.protocol-antenna-core {
  width: 56px;
  height: 56px;
  border: 1px solid var(--signal-text, #d6ff73);
  border-radius: 50%;
  background: color-mix(in srgb, var(--signal, #d6ff73) 12%, transparent);
  box-shadow: 0 0 24px color-mix(in srgb, var(--signal, #d6ff73) 30%, transparent);
}

/* Tuner Stage (Step 2) */
.protocol-tuner {
  display: grid;
  gap: 16px;
  padding: 10px 0 20px;
}

.protocol-tuner-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font: 500 11px/1 var(--font-mono, monospace);
  letter-spacing: .2em;
  color: var(--ink-dim, #888);
}

.protocol-tuner-header output {
  font: 600 18px/1 var(--font-mono, monospace);
  color: var(--signal-text, #d6ff73);
}

.protocol-tuner-header output.is-locked {
  color: var(--cyan, #78d7e3);
  text-shadow: 0 0 10px var(--cyan, #78d7e3);
}

.protocol-scope-canvas {
  width: 100%;
  height: 100px;
  border: 1px solid var(--line-strong, #333);
  background: #040609;
  clip-path: var(--notch);
  display: block;
}

.protocol-tuner input[type="range"] {
  width: 100%;
  accent-color: var(--signal-text, #d6ff73);
  cursor: pointer;
  margin: 10px 0;
}

/* Coordinate Grid (Step 3) */
.protocol-coordinate-wrap {
  display: grid;
  gap: 16px;
}

.protocol-coordinate-hud {
  display: flex;
  justify-content: space-between;
  font: 500 11px/1 var(--font-mono, monospace);
  letter-spacing: .15em;
  color: var(--ink-dim, #888);
}

.protocol-coordinate-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  max-width: 420px;
  margin: 10px auto;
}

.protocol-coordinate-grid button {
  aspect-ratio: 1;
  border: 1px solid var(--line, #333);
  background: color-mix(in srgb, var(--panel, #111) 60%, transparent);
  color: var(--ink-faint, #777);
  font: 500 11px/1 var(--font-mono, monospace);
  cursor: pointer;
  transition: all .2s;
  position: relative;
}

.protocol-coordinate-grid button:hover,
.protocol-coordinate-grid button:focus-visible {
  border-color: var(--signal-text, #d6ff73);
  color: var(--ink, #fff);
  background: color-mix(in srgb, var(--signal, #d6ff73) 14%, transparent);
}

.protocol-coordinate-grid button.is-signal {
  border-color: var(--cyan, #78d7e3);
  color: var(--cyan, #78d7e3);
  box-shadow: 0 0 16px color-mix(in srgb, var(--cyan, #78d7e3) 35%, transparent);
  animation: protocol-signal-pulse 1.8s ease-in-out infinite;
}

@keyframes protocol-signal-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.08); box-shadow: 0 0 24px color-mix(in srgb, var(--cyan, #78d7e3) 60%, transparent); }
}

/* Synchronizer (Step 4) */
.protocol-sync-wrap {
  display: grid;
  place-items: center;
  margin: 20px 0;
  position: relative;
}

.protocol-sync-ring {
  position: relative;
  width: 170px;
  height: 170px;
  border: 1px dashed var(--line-strong, #444);
  border-radius: 50%;
  display: grid;
  place-items: center;
}

.protocol-sync-ring::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid var(--cyan, #78d7e3);
  border-radius: 50%;
  transform: rotate(calc(var(--sync, 78) * 3.6deg));
  transition: transform .1s;
}

.protocol-sync-ring button {
  position: relative;
  z-index: 2;
  width: 80px;
  height: 80px;
  border: 1px solid var(--signal-text, #d6ff73);
  border-radius: 50%;
  background: color-mix(in srgb, var(--panel, #111) 90%, transparent);
  color: var(--signal-text, #d6ff73);
  font: 600 11px/1.2 var(--font-mono, monospace);
  letter-spacing: .1em;
  cursor: pointer;
  transition: all .2s;
}

.protocol-sync-ring button:hover,
.protocol-sync-ring button:active {
  transform: scale(1.05);
  background: color-mix(in srgb, var(--signal, #d6ff73) 20%, transparent);
  box-shadow: 0 0 24px color-mix(in srgb, var(--signal, #d6ff73) 40%, transparent);
}

/* Map / Deep Survey (Step 5) */
.protocol-scan-options {
  display: flex;
  gap: 10px;
  margin: 12px 0 18px;
}

.protocol-scan-options button {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--line, #333);
  background: color-mix(in srgb, var(--panel, #111) 60%, transparent);
  color: var(--ink-dim, #888);
  font: 500 11px/1 var(--font-mono, monospace);
  letter-spacing: .15em;
  cursor: pointer;
  transition: all .2s;
}

.protocol-scan-options button[aria-pressed="true"] {
  border-color: var(--signal-text, #d6ff73);
  color: var(--signal-text, #d6ff73);
  background: color-mix(in srgb, var(--signal, #d6ff73) 12%, transparent);
}

.protocol-map {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 8px;
  margin: 14px 0 20px;
}

.protocol-map article {
  padding: 12px 14px;
  border: 1px solid var(--line, #222);
  background: color-mix(in srgb, var(--panel, #111) 40%, transparent);
}

.protocol-map small {
  display: block;
  font: 500 var(--fs-micro)/1 var(--font-mono, monospace);
  letter-spacing: .2em;
  color: var(--cyan, #78d7e3);
  margin-bottom: 4px;
}

.protocol-map b {
  font: 500 12px/1.3 var(--font-sans, sans-serif);
  color: var(--ink, #f4f7f8);
}

/* Primary Action Buttons */
.protocol-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font: 600 12px/1 var(--font-mono, monospace);
  letter-spacing: .2em;
  color: #0c0e14;
  background: var(--signal-text, #d6ff73);
  border: 0;
  clip-path: var(--notch);
  cursor: pointer;
  transition: all .2s;
  justify-self: start;
}

.protocol-action:hover:not(:disabled) {
  background: #e6ff99;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, .4), 0 0 16px color-mix(in srgb, var(--signal, #d6ff73) 40%, transparent);
}

.protocol-action:disabled {
  opacity: .4;
  cursor: not-allowed;
}

.protocol-hint {
  min-height: 20px;
  font: 400 11px/1.4 var(--font-mono, monospace);
  letter-spacing: .12em;
  color: var(--amber, #e6c44c);
  margin: 10px 0 0;
}

/* Discovery Log */
.protocol-discovery {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px dashed var(--line-strong, #333);
}

.protocol-discovery header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 12px;
}

.protocol-discovery h4 {
  margin: 0;
  font: 600 16px/1.2 var(--font-serif, serif);
}

.protocol-discovery-list {
  display: grid;
  gap: 8px;
  max-height: 220px;
  overflow-y: auto;
}

.protocol-discovery-list article {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border: 1px solid var(--line, #222);
  background: color-mix(in srgb, var(--panel, #111) 40%, transparent);
}

.protocol-discovery-list strong {
  display: block;
  font: 500 13px/1.3 var(--font-sans, sans-serif);
  color: var(--ink, #fff);
}

.protocol-discovery-list p {
  margin: 4px 0 0;
  font-size: 11.5px;
  color: var(--ink-dim, #888);
}

.protocol-discovery-list a,
.protocol-discovery-list button {
  padding: 6px 12px;
  font: 500 var(--fs-micro)/1 var(--font-mono, monospace);
  letter-spacing: .15em;
  border: 1px solid var(--line-strong, #444);
  background: transparent;
  color: var(--signal-text, #d6ff73);
  text-decoration: none;
  cursor: pointer;
}

/* Footer tools */
.protocol-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--line, #222);
}

.protocol-tools button {
  padding: 6px 10px;
  font: 400 var(--fs-micro)/1 var(--font-mono, monospace);
  letter-spacing: .12em;
  color: var(--ink-dim, #888);
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line, #444);
  cursor: pointer;
  transition: color .2s, border-color .2s;
}

.protocol-tools button:hover {
  color: var(--ink, #fff);
  border-color: var(--signal-text, #d6ff73);
}

@media (max-width: 620px) {
  .protocol-indicator {
    left: 16px;
    bottom: 16px;
    padding: 6px 10px;
  }
  .protocol-progress {
    gap: 4px;
  }
  .protocol-progress-step span {
    display: none;
  }
}



/* ============================================================
   NEBULA NIGHT MODE (SAFE AMBIENT LAYER & TRANSPARENT HEADER)
   ============================================================ */
body.series-nebula-mode .ambient {
  background:
    radial-gradient(60% 50% at 20% 15%, rgba(138, 43, 226, 0.18), transparent 70%),
    radial-gradient(55% 45% at 85% 25%, rgba(0, 210, 255, 0.16), transparent 70%),
    radial-gradient(70% 50% at 50% 80%, rgba(255, 20, 147, 0.12), transparent 75%),
    radial-gradient(40% 35% at 75% 70%, rgba(57, 211, 83, 0.10), transparent 60%) !important;
}

html[data-theme="light"] body.series-nebula-mode .ambient {
  background:
    radial-gradient(60% 50% at 20% 15%, rgba(185, 160, 250, 0.22), transparent 70%),
    radial-gradient(55% 45% at 85% 25%, rgba(130, 215, 255, 0.20), transparent 70%),
    radial-gradient(70% 50% at 50% 80%, rgba(255, 185, 205, 0.18), transparent 75%),
    radial-gradient(40% 35% at 75% 70%, rgba(160, 235, 160, 0.15), transparent 60%) !important;
}

body.series-nebula-mode .site-header,
body.series-nebula-mode .archive-header,
body.series-nebula-mode .lab-header {
  background: rgba(5, 6, 12, 0.55) !important;
  backdrop-filter: blur(12px) !important;
  -webkit-backdrop-filter: blur(12px) !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08) !important;
}

html[data-theme="light"] body.series-nebula-mode .site-header,
html[data-theme="light"] body.series-nebula-mode .archive-header,
html[data-theme="light"] body.series-nebula-mode .lab-header {
  background: rgba(246, 242, 233, 0.72) !important;
  backdrop-filter: blur(12px) !important;
  -webkit-backdrop-filter: blur(12px) !important;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06) !important;
}