:root {
  --bg: #090d16;
  --bg-subtle: #0f172a;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --card-bg: #0f172a;
  --card-border: #1e293b;
  --card-hover-border: #38bdf8;
  --accent: #38bdf8;
  --accent-hover: #0284c7;
  --accent-admin: #a855f7;
  --accent-admin-bg: rgba(168, 85, 247, 0.1);
  --accent-admin-border: rgba(168, 85, 247, 0.3);
  --code-bg: #070b12;
  --code-border: #1e293b;
  --status-bg: rgba(16, 185, 129, 0.12);
  --status-border: rgba(16, 185, 129, 0.35);
  --status-text: #34d399;
  --header-border: #1e293b;
  --footer-border: #1e293b;
  --btn-active-bg: #0284c7;
  --btn-active-text: #ffffff;
}

[data-theme="light"] {
  --bg: #f8fafc;
  --bg-subtle: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --card-bg: #ffffff;
  --card-border: #e2e8f0;
  --card-hover-border: #0284c7;
  --accent: #0284c7;
  --accent-hover: #0369a1;
  --accent-admin: #7c3aed;
  --accent-admin-bg: #f5f3ff;
  --accent-admin-border: #ddd6fe;
  --code-bg: #f1f5f9;
  --code-border: #e2e8f0;
  --status-bg: #ecfdf5;
  --status-border: #a7f3d0;
  --status-text: #059669;
  --header-border: #e2e8f0;
  --footer-border: #e2e8f0;
  --btn-active-bg: #0284c7;
  --btn-active-text: #ffffff;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
  transition: background-color 0.15s ease, color 0.15s ease;
}

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  border-bottom: 1px solid var(--header-border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.brand-badge {
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--accent);
}

.brand-sub {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.15rem 0.4rem;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 4px;
  color: var(--text-muted);
}

.controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 6px;
  padding: 2px;
  gap: 2px;
}

.lang-divider {
  width: 1px;
  height: 12px;
  background-color: var(--card-border);
}

.lang-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  padding: 0.25rem 0.55rem;
  border-radius: 4px;
  cursor: pointer;
  outline: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.lang-btn:hover:not(.active) {
  color: var(--text-main);
  background-color: var(--code-bg);
}

.lang-btn.active {
  background: var(--btn-active-bg);
  color: var(--btn-active-text);
}

.theme-toggle {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-muted);
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.theme-toggle:hover {
  color: var(--text-main);
  border-color: var(--card-hover-border);
}

[data-theme="dark"] .theme-toggle .sun-icon { display: block; }
[data-theme="dark"] .theme-toggle .moon-icon { display: none; }
[data-theme="light"] .theme-toggle .sun-icon { display: none; }
[data-theme="light"] .theme-toggle .moon-icon { display: block; }

/* Main Container */
.container {
  flex: 1;
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Hero */
.hero {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
}

.hero-top {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.25rem 0.65rem;
  background: var(--status-bg);
  border: 1px solid var(--status-border);
  border-radius: 5px;
  font-size: 0.75rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--status-text);
  text-decoration: none;
  transition: border-color 0.15s ease;
}

.status-pill:hover {
  border-color: var(--status-text);
}

.status-dot {
  width: 6px;
  height: 6px;
  background-color: var(--status-text);
  border-radius: 50%;
  animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.proto-tag {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  padding: 0.25rem 0.55rem;
  border-radius: 5px;
}

.node-title {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-main);
  word-break: break-all;
}

.node-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 650px;
}

/* Grid Layout */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.25rem;
}

.box {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  transition: border-color 0.15s ease;
}

.box:hover {
  border-color: var(--card-hover-border);
}

.box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--card-border);
}

.box-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.box-badge {
  font-family: ui-monospace, SFMono-Regular, monospace;
  font-size: 0.7rem;
  color: var(--text-muted);
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
}

.admin-badge-tag {
  color: var(--accent-admin);
  border-color: var(--accent-admin-border);
  background: var(--accent-admin-bg);
}

/* NS List */
.ns-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.ns-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  padding: 0.55rem 0.75rem;
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.85rem;
  transition: border-color 0.15s ease;
}

.ns-item.current-node {
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.07);
}

.ns-info {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.ns-num {
  font-size: 0.7rem;
  color: var(--text-muted);
  opacity: 0.7;
}

.ns-item code {
  color: var(--text-main);
  user-select: all;
}

/* Endpoint Links */
.endpoint-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.endpoint-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  padding: 0.6rem 0.75rem;
  border-radius: 6px;
  text-decoration: none;
  color: var(--text-main);
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.endpoint-link:hover {
  border-color: var(--accent);
}

.endpoint-left {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.endpoint-main {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.85rem;
  font-weight: 600;
}

.endpoint-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.badge-role {
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  background: var(--accent-admin);
  color: #ffffff;
}

.admin-highlight {
  border-color: var(--accent-admin-border);
  background: var(--accent-admin-bg);
}

.admin-highlight:hover {
  border-color: var(--accent-admin);
}

.ext-icon {
  color: var(--text-muted);
  flex-shrink: 0;
}

.endpoint-link:hover .ext-icon {
  color: var(--text-main);
}

/* Copy Button */
.copy-btn {
  background: none;
  border: 1px solid transparent;
  color: var(--text-muted);
  cursor: pointer;
  padding: 3px 5px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.copy-btn:hover {
  color: var(--text-main);
  background: var(--card-bg);
  border-color: var(--card-border);
}

.copy-tooltip {
  position: absolute;
  top: 50%;
  right: calc(100% + 6px);
  transform: translateY(-50%);
  background: var(--accent);
  color: var(--bg);
  font-size: 0.68rem;
  font-weight: 700;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  padding: 2px 6px;
  border-radius: 3px;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.15s ease, visibility 0.15s ease;
  white-space: nowrap;
  z-index: 10;
}

.copy-btn.copied .copy-tooltip {
  opacity: 1;
  visibility: visible;
}

/* Terminal Box */
.terminal-box {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 8px;
  overflow: hidden;
}

.terminal-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--code-border);
  padding: 0.45rem 0.85rem;
}

.term-dots {
  display: flex;
  gap: 5px;
}

.term-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--card-border);
}

.term-title {
  font-family: ui-monospace, SFMono-Regular, monospace;
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: lowercase;
}

.term-body {
  padding: 0.75rem 0.85rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.85rem;
  position: relative;
}

.term-prompt {
  color: var(--accent);
  font-weight: 700;
  user-select: none;
  flex-shrink: 0;
}

.term-body code {
  color: var(--text-main);
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  user-select: all;
  white-space: nowrap;
}

.copy-btn.copy-term {
  flex-shrink: 0;
}

/* Footer */
.footer {
  border-top: 1px solid var(--footer-border);
  padding: 1.25rem 1.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-container {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-meta {
  font-family: ui-monospace, SFMono-Regular, monospace;
  font-size: 0.75rem;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.sep {
  opacity: 0.3;
}

@media (max-width: 600px) {
  .container {
    padding: 1.5rem 1rem 2rem;
    gap: 1.5rem;
  }
  .grid {
    grid-template-columns: 1fr;
  }
  .footer-container {
    flex-direction: column;
    align-items: flex-start;
  }
}