:root {
  --bg: #0d1117;
  --surface: #161b22;
  --surface2: #1c2230;
  --border: #2a3444;
  --accent: #e95420;
  --accent2: #f97316;
  --ubuntu-aubergine: #2c001e;
  --text: #e6edf3;
  --text-muted: #7d8590;
  --text-dim: #4a5568;
  --green: #3fb950;
  --blue: #58a6ff;
  --yellow: #d29922;
  --red: #f85149;
  --purple: #bc8cff;
}

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

body {
  font-family: 'Syne', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Header */
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 58px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 32px; height: 32px;
  background: var(--accent);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
}

.logo span { color: var(--accent); }

.header-actions { display: flex; gap: 10px; align-items: center; }

.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 7px 16px;
  border: none; border-radius: 6px; cursor: pointer;
  font-family: 'Syne', sans-serif; font-size: 13px; font-weight: 600;
  transition: all 0.15s; text-decoration: none;
}

.btn-ghost {
  background: transparent; color: var(--text-muted); border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--surface2); color: var(--text); border-color: var(--text-dim); }

.btn-primary {
  background: var(--accent); color: white;
}
.btn-primary:hover { background: var(--accent2); transform: translateY(-1px); }

.btn-success {
  background: #1a3a25; color: var(--green); border: 1px solid #2d5a3a;
}
.btn-success:hover { background: #233f2a; }

/* Layout */
.app-layout {
  display: grid;
  grid-template-columns: 280px 1fr 400px;
  height: calc(100vh - 58px);
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  overflow: hidden;
}

.sidebar-header {
  padding: 16px;
  border-bottom: 1px solid var(--border);
  font-size: 11px; font-weight: 700; letter-spacing: 1.5px;
  color: var(--text-muted); text-transform: uppercase;
  display: flex; justify-content: space-between; align-items: center;
}

.sidebar-scroll { flex: 1; overflow-y: auto; padding: 8px; }

.section-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border-radius: 6px; cursor: pointer;
  font-size: 13px; font-weight: 600; color: var(--text-muted);
  transition: all 0.15s; margin-bottom: 2px;
  border: 1px solid transparent;
}

.section-item:hover { background: var(--surface2); color: var(--text); }
.section-item.active { background: rgba(233, 84, 32, 0.12); color: var(--accent); border-color: rgba(233,84,32,0.25); }

.section-item .icon { font-size: 15px; width: 20px; text-align: center; }
.section-item .badge {
  margin-left: auto; background: var(--accent); color: white;
  border-radius: 4px; padding: 1px 6px; font-size: 10px;
}

.section-group-label {
  padding: 12px 12px 4px;
  margin-top: 8px;
  font-size: 10px; font-weight: 700; letter-spacing: 1.5px;
  color: var(--text-dim); text-transform: uppercase;
}
.section-group-label:first-child { margin-top: 0; }

.field-group-desc {
  font-size: 11px; color: var(--text-muted); margin-bottom: 12px; line-height: 1.5;
}

/* Form Panel */
.form-panel {
  overflow-y: auto;
  background: var(--bg);
  padding: 24px;
}

.section-block {
  display: none;
}
.section-block.active {
  display: block;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.section-title {
  font-size: 22px; font-weight: 800; letter-spacing: -0.5px;
  margin-bottom: 6px;
}

.section-desc {
  font-size: 13px; color: var(--text-muted); margin-bottom: 24px;
  line-height: 1.5;
}

.field-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 16px;
}

.field-group-title {
  font-size: 12px; font-weight: 700; letter-spacing: 1px;
  text-transform: uppercase; color: var(--text-muted);
  margin-bottom: 16px; padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.field-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
  margin-bottom: 14px;
}
.field-row.full { grid-template-columns: 1fr; }
.field-row.triple { grid-template-columns: 1fr 1fr 1fr; }

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

label {
  font-size: 12px; font-weight: 600; color: var(--text-muted);
  letter-spacing: 0.3px;
}

label .required { color: var(--accent); margin-left: 3px; }

input[type="text"], input[type="password"], input[type="number"],
select, textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 9px 12px;
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  transition: border-color 0.15s, box-shadow 0.15s;
  width: 100%;
  outline: none;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(233,84,32,0.15);
}

textarea { resize: vertical; min-height: 80px; }

select option { background: var(--surface); }

.toggle-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 0;
}
.toggle-row.disabled { opacity: 0.38; pointer-events: none; }

.hash-status {
  font-size: 10px; color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
  min-height: 14px; margin-top: 3px;
  transition: color 0.2s;
}
.hash-status.hashing { color: var(--yellow); }
.hash-status.ready   { color: var(--green); }
.toggle-label { font-size: 13px; font-weight: 600; }
.toggle-sub { font-size: 11px; color: var(--text-muted); margin-top: 2px; }

.toggle {
  position: relative; width: 42px; height: 22px;
  flex-shrink: 0;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute; inset: 0;
  background: var(--border); border-radius: 22px; cursor: pointer;
  transition: 0.2s;
}
.toggle-slider::before {
  content: ''; position: absolute;
  width: 16px; height: 16px;
  background: white; border-radius: 50%;
  top: 3px; left: 3px; transition: 0.2s;
}
.toggle input:checked + .toggle-slider { background: var(--accent); }
.toggle input:checked + .toggle-slider::before { transform: translateX(20px); }

/* Dynamic list items */
.list-item {
  display: grid; gap: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  margin-bottom: 10px;
  position: relative;
}

.list-item-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 8px;
}

.list-item-title { font-size: 12px; font-weight: 700; color: var(--text-muted); }

.btn-remove {
  background: rgba(248,81,73,0.1); color: var(--red);
  border: 1px solid rgba(248,81,73,0.2); border-radius: 4px;
  padding: 3px 8px; font-size: 11px; cursor: pointer; font-family: 'Syne', sans-serif;
  transition: all 0.15s;
}
.btn-remove:hover { background: rgba(248,81,73,0.2); }

.btn-add {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 14px; border-radius: 6px;
  border: 1px dashed var(--border); background: transparent;
  color: var(--text-muted); cursor: pointer;
  font-family: 'Syne', sans-serif; font-size: 12px; font-weight: 600;
  transition: all 0.15s; width: 100%; justify-content: center;
  margin-top: 8px;
}
.btn-add:hover { border-color: var(--accent); color: var(--accent); background: rgba(233,84,32,0.05); }

/* YAML Preview */
.yaml-panel {
  background: var(--surface);
  border-left: 1px solid var(--border);
  display: flex; flex-direction: column;
  overflow: hidden;
}

.yaml-header {
  padding: 0 16px;
  height: 48px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  background: var(--ubuntu-aubergine);
}

.yaml-title {
  font-size: 12px; font-weight: 700; letter-spacing: 1px;
  color: #c08070; text-transform: uppercase;
  display: flex; align-items: center; gap: 8px;
}

.yaml-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }

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

.yaml-output {
  flex: 1; overflow-y: auto;
  padding: 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  line-height: 1.7;
  white-space: pre;
  color: #e6edf3;
}

/* Syntax highlighting */
.y-key { color: var(--blue); }
.y-val { color: #a5d6ff; }
.y-str { color: #79c0ff; }
.y-num { color: var(--purple); }
.y-bool-true { color: var(--green); }
.y-bool-false { color: var(--red); }
.y-comment { color: var(--text-dim); font-style: italic; }
.y-dash { color: var(--accent); }
.y-section { color: var(--yellow); font-weight: 700; }

/* Tabs in yaml panel */
.yaml-tabs {
  display: flex; gap: 0;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.yaml-tab {
  padding: 10px 18px;
  font-size: 12px; font-weight: 600;
  color: var(--text-muted); cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
}
.yaml-tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.yaml-tab:hover:not(.active) { color: var(--text); }

/* Raw edit */
.raw-editor {
  flex: 1; display: none; flex-direction: column;
}
.raw-editor.active { display: flex; }
.raw-editor textarea {
  flex: 1; border: none; border-radius: 0;
  background: var(--bg); color: var(--text);
  padding: 20px; font-size: 12px; line-height: 1.7;
  resize: none;
  box-shadow: none !important;
}
.raw-editor textarea:focus { box-shadow: none !important; border-color: transparent !important; }

.preview-wrap { flex: 1; overflow: hidden; display: flex; flex-direction: column; }
.preview-wrap.hidden { display: none; }

/* Scrollbars */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* Support banner */
.support-bar {
  background: var(--ubuntu-aubergine);
  border-top: 1px solid #3a1a2e;
  padding: 6px 20px;
  font-size: 12px;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  color: #c08070;
}
.support-bar a {
  color: var(--accent); font-weight: 700; text-decoration: none;
}
.support-bar a:hover { text-decoration: underline; }

/* Status bar */
.status-bar {
  padding: 5px 20px; font-size: 11px; color: var(--text-dim);
  background: var(--surface); border-top: 1px solid var(--border);
  display: flex; gap: 16px; align-items: center;
}
.status-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--green); }

/* Notification */
.toast {
  position: fixed; bottom: 24px; right: 24px;
  background: var(--green); color: #0d1117;
  padding: 10px 18px; border-radius: 8px;
  font-size: 13px; font-weight: 700;
  opacity: 0; transform: translateY(10px);
  transition: all 0.25s; z-index: 999; pointer-events: none;
}
.toast.show { opacity: 1; transform: translateY(0); }

/* File drop zone */
.drop-zone {
  border: 2px dashed var(--border); border-radius: 8px;
  padding: 24px; text-align: center;
  color: var(--text-muted); font-size: 13px;
  transition: all 0.2s; cursor: pointer; margin-bottom: 16px;
}
.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--accent); background: rgba(233,84,32,0.05); color: var(--accent);
}
.drop-zone .drop-icon { font-size: 28px; margin-bottom: 8px; }

/* Chip / tag */
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.chip {
  display: flex; align-items: center; gap: 5px;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 20px; padding: 3px 10px; font-size: 12px;
  font-family: 'JetBrains Mono', monospace; color: var(--blue);
}
.chip-del { cursor: pointer; color: var(--text-muted); font-size: 14px; }
.chip-del:hover { color: var(--red); }

/* Responsive hint */
@media (max-width: 1100px) {
  .app-layout { grid-template-columns: 220px 1fr 340px; }
}