:root {
  --fog-bg: #0d1117;
  --fog-surface: #161b22;
  --fog-surface-2: #21262d;
  --fog-border: #30363d;
  --fog-accent: #238636;
  --fog-accent-hover: #2ea043;
  --fog-link: #58a6ff;
  --fog-highlight: #e94560;
  --fog-text: #e6edf3;
  --fog-muted: #8b949e;
  --fog-success: #3fb950;
  --fog-warning: #d29922;
  --fog-error: #f85149;
  --fog-radius: 6px;
  --fog-radius-lg: 12px;
  --fog-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --fog-font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --fog-shadow: 0 1px 3px rgba(0,0,0,0.4);
  --fog-max-width: 900px;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--fog-font);
  background: var(--fog-bg);
  color: var(--fog-text);
  line-height: 1.6;
  min-height: 100vh;
}

/* Layout */
.container { max-width: var(--fog-max-width); margin: 0 auto; padding: 0 1rem; }

/* Header */
.site-header {
  background: var(--fog-surface);
  border-bottom: 1px solid var(--fog-border);
  padding: 0.75rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--fog-text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.site-logo .fog-mark {
  color: var(--fog-accent-hover);
  font-weight: 900;
}

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

.site-nav a, .btn-nav {
  color: var(--fog-muted);
  text-decoration: none;
  font-size: 0.875rem;
  padding: 0.375rem 0.75rem;
  border-radius: var(--fog-radius);
  border: none;
  background: none;
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}

.site-nav a:hover, .btn-nav:hover {
  color: var(--fog-text);
  background: var(--fog-surface-2);
}

.site-nav a.active { color: var(--fog-text); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 1rem;
  border-radius: var(--fog-radius);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--fog-accent);
  color: #fff;
  border-color: var(--fog-accent);
}

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

.btn-secondary {
  background: var(--fog-surface-2);
  color: var(--fog-text);
  border-color: var(--fog-border);
}

.btn-secondary:hover { background: var(--fog-border); }

.btn-ghost {
  background: transparent;
  color: var(--fog-link);
  border-color: var(--fog-border);
}

.btn-ghost:hover { background: var(--fog-surface-2); }

.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* Forms */
.form-group { margin-bottom: 1rem; }

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--fog-text);
  margin-bottom: 0.375rem;
}

.label-muted { color: var(--fog-muted); font-weight: 400; }

input[type="text"],
input[type="email"],
input[type="url"],
textarea,
select {
  width: 100%;
  padding: 0.625rem 0.75rem;
  background: var(--fog-surface);
  border: 1px solid var(--fog-border);
  border-radius: var(--fog-radius);
  color: var(--fog-text);
  font-family: var(--fog-font);
  font-size: 0.9375rem;
  transition: border-color 0.15s;
  -webkit-appearance: none;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="url"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--fog-link);
  box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.15);
}

textarea {
  resize: vertical;
  min-height: 120px;
  font-family: var(--fog-font);
  line-height: 1.5;
}

.form-hint {
  font-size: 0.8rem;
  color: var(--fog-muted);
  margin-top: 0.25rem;
}

/* Cards */
.card {
  background: var(--fog-surface);
  border: 1px solid var(--fog-border);
  border-radius: var(--fog-radius-lg);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

/* Tags */
.tag-list { display: flex; flex-wrap: wrap; gap: 0.375rem; margin-top: 0.5rem; }

.tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background: var(--fog-surface-2);
  border: 1px solid var(--fog-border);
  border-radius: 99px;
  font-size: 0.75rem;
  color: var(--fog-muted);
  cursor: default;
}

.tag-input-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  padding: 0.5rem;
  background: var(--fog-surface);
  border: 1px solid var(--fog-border);
  border-radius: var(--fog-radius);
  min-height: 44px;
  cursor: text;
}

.tag-input-container input {
  border: none;
  background: none;
  padding: 0;
  flex: 1;
  min-width: 120px;
  font-size: 0.875rem;
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.15rem 0.5rem;
  background: var(--fog-surface-2);
  border: 1px solid var(--fog-border);
  border-radius: 99px;
  font-size: 0.8rem;
  color: var(--fog-text);
}

.tag-chip button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--fog-muted);
  padding: 0 0.1rem;
  font-size: 0.9rem;
  line-height: 1;
}

.tag-chip button:hover { color: var(--fog-error); }

/* Alerts / notifications */
.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--fog-radius);
  font-size: 0.875rem;
  margin-bottom: 1rem;
  border: 1px solid transparent;
}

.alert-info { background: rgba(88,166,255,0.1); border-color: rgba(88,166,255,0.3); color: var(--fog-link); }
.alert-success { background: rgba(63,185,80,0.1); border-color: rgba(63,185,80,0.3); color: var(--fog-success); }
.alert-error { background: rgba(248,81,73,0.1); border-color: rgba(248,81,73,0.3); color: var(--fog-error); }
.alert-warning { background: rgba(210,153,34,0.1); border-color: rgba(210,153,34,0.3); color: var(--fog-warning); }

/* Autosave indicator */
.autosave-status {
  font-size: 0.75rem;
  color: var(--fog-muted);
  display: flex;
  align-items: center;
  gap: 0.25rem;
  transition: color 0.3s;
}
.autosave-status.saving { color: var(--fog-warning); }
.autosave-status.saved { color: var(--fog-success); }

/* Views */
.view { display: none; }
.view.active { display: block; }

/* Hero */
.hero {
  text-align: center;
  padding: 4rem 1rem 3rem;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.hero-tagline {
  font-size: 1.125rem;
  color: var(--fog-muted);
  max-width: 520px;
  margin: 0 auto 2rem;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.feature-card {
  background: var(--fog-surface);
  border: 1px solid var(--fog-border);
  border-radius: var(--fog-radius-lg);
  padding: 1.25rem;
}

.feature-icon { font-size: 1.5rem; margin-bottom: 0.75rem; }
.feature-title { font-size: 0.9375rem; font-weight: 600; margin-bottom: 0.375rem; }
.feature-desc { font-size: 0.875rem; color: var(--fog-muted); }

/* Wiki / Grounds list */
.page-list { display: flex; flex-direction: column; gap: 0.75rem; }

.page-item {
  background: var(--fog-surface);
  border: 1px solid var(--fog-border);
  border-radius: var(--fog-radius-lg);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
  transition: border-color 0.15s;
}

.page-item:hover { border-color: var(--fog-link); }
.page-item-title { font-weight: 600; font-size: 0.9375rem; margin-bottom: 0.25rem; }
.page-item-meta { font-size: 0.8rem; color: var(--fog-muted); }

/* Markdown content */
.markdown-content {
  line-height: 1.7;
}
.markdown-content h1,.markdown-content h2,.markdown-content h3 {
  margin: 1.5rem 0 0.75rem;
  font-weight: 600;
}
.markdown-content p { margin-bottom: 1rem; }
.markdown-content code {
  background: var(--fog-surface-2);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-family: var(--fog-font-mono);
  font-size: 0.875em;
}
.markdown-content pre {
  background: var(--fog-surface-2);
  border: 1px solid var(--fog-border);
  border-radius: var(--fog-radius);
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 1rem;
}
.markdown-content pre code { background: none; padding: 0; }
.markdown-content ul, .markdown-content ol { padding-left: 1.5rem; margin-bottom: 1rem; }
.markdown-content blockquote {
  border-left: 3px solid var(--fog-border);
  padding-left: 1rem;
  color: var(--fog-muted);
}

/* Share toggle */
.share-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  cursor: pointer;
}

.toggle-switch {
  position: relative;
  width: 36px;
  height: 20px;
}

.toggle-switch input { opacity: 0; width: 0; height: 0; }

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--fog-border);
  border-radius: 20px;
  transition: 0.2s;
}

.toggle-switch input:checked + .toggle-slider { background: var(--fog-accent); }
.toggle-slider::before {
  content: "";
  position: absolute;
  height: 14px;
  width: 14px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: 0.2s;
}
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(16px); }

/* Loading */
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid var(--fog-border);
  border-top-color: var(--fog-link);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--fog-muted);
}
.empty-state-icon { font-size: 2.5rem; margin-bottom: 0.75rem; }
.empty-state h3 { font-size: 1.1rem; color: var(--fog-text); margin-bottom: 0.5rem; }

/* Page header */
.page-header {
  padding: 1.5rem 0 1rem;
  border-bottom: 1px solid var(--fog-border);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.page-header h1 { font-size: 1.375rem; font-weight: 700; }

/* Draft restore banner */
.draft-restore-banner {
  background: rgba(210,153,34,0.1);
  border: 1px solid rgba(210,153,34,0.3);
  border-radius: var(--fog-radius);
  padding: 0.625rem 1rem;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--fog-border);
  padding: 1.5rem 0;
  margin-top: 4rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--fog-muted);
}
.site-footer a { color: var(--fog-muted); }

/* Responsive */
@media (max-width: 600px) {
  .hero-title { font-size: 1.75rem; }
  .hero-tagline { font-size: 1rem; }
  .site-nav .btn-nav span { display: none; }
  .page-header { flex-direction: column; align-items: flex-start; }
  .feature-grid { grid-template-columns: 1fr; }
}