/* pgviz — shared stylesheet. Dark mode is the default; light mode via [data-theme="light"]. */

:root {
  --bg: #0d1117;
  --bg-surface: #161b22;
  --bg-inset: #010409;
  --border: #30363d;
  --border-strong: #484f58;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --accent-strong: #1f6feb;
  --ok: #3fb950;
  --warn: #d29922;
  --bad: #f85149;
  --badge-warn-bg: rgba(210, 153, 34, 0.15);
  --badge-bad-bg: rgba(248, 81, 73, 0.15);
  --shadow: 0 1px 3px rgba(1, 4, 9, 0.5);
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color-scheme: dark;
}

[data-theme="light"] {
  --bg: #ffffff;
  --bg-surface: #f6f8fa;
  --bg-inset: #eff2f5;
  --border: #d0d7de;
  --border-strong: #afb8c1;
  --text: #1f2328;
  --text-muted: #656d76;
  --accent: #0969da;
  --accent-strong: #0550ae;
  --ok: #1a7f37;
  --warn: #9a6700;
  --bad: #cf222e;
  --badge-warn-bg: rgba(154, 103, 0, 0.12);
  --badge-bad-bg: rgba(207, 34, 46, 0.1);
  --shadow: 0 1px 3px rgba(31, 35, 40, 0.12);
  color-scheme: light;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- Header ---------- */

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

.site-logo {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

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

.header-spacer { flex: 1; }

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 0.3rem 0.55rem;
  line-height: 1;
}
.theme-toggle:hover { color: var(--text); border-color: var(--border-strong); }

/* ---------- Typography ---------- */

h1 { font-size: 1.8rem; line-height: 1.25; margin: 1.5rem 0 0.5rem; }
h2 { font-size: 1.35rem; margin: 2rem 0 0.5rem; }
h3 { font-size: 1.1rem; margin: 1.5rem 0 0.5rem; }

a { color: var(--accent); }
a:hover { color: var(--accent-strong); }

p.lead { font-size: 1.1rem; color: var(--text-muted); margin-top: 0; }

code, pre, textarea.plan-input, .mono {
  font-family: var(--mono);
  font-size: 0.875em;
}

code {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1em 0.35em;
}

pre {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
}
pre code { background: none; border: none; padding: 0; }

/* ---------- Tool cards (homepage) ---------- */

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.tool-card {
  display: block;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
  text-decoration: none;
  color: var(--text);
  box-shadow: var(--shadow);
  transition: border-color 0.15s ease;
}
.tool-card:hover { border-color: var(--accent); color: var(--text); }
.tool-card h2 { margin: 0 0 0.4rem; font-size: 1.15rem; color: var(--accent); }
.tool-card p { margin: 0; color: var(--text-muted); font-size: 0.95rem; }

.privacy-note {
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--ok);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  margin: 1.5rem 0;
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  cursor: pointer;
  font-family: var(--sans);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.45rem 1rem;
}
.btn:hover { border-color: var(--border-strong); }
.btn:active { transform: translateY(1px); }

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

.btn-ghost {
  background: transparent;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.75rem 0;
  align-items: center;
}

/* ---------- Plan input ---------- */

textarea.plan-input {
  width: 100%;
  min-height: 220px;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 0.75rem;
  resize: vertical;
  line-height: 1.45;
}
textarea.plan-input:focus {
  outline: none;
  border-color: var(--accent);
}

.parse-error {
  background: var(--badge-bad-bg);
  border: 1px solid var(--bad);
  border-radius: 8px;
  color: var(--text);
  padding: 0.75rem 1rem;
  margin: 0.75rem 0;
  font-size: 0.95rem;
}
.parse-error strong { color: var(--bad); }

/* ---------- Plan summary bar ---------- */

.plan-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem 1.25rem;
  margin: 1.25rem 0 0.75rem;
}

.plan-summary .stat { min-width: 120px; }
.plan-summary .stat-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}
.plan-summary .stat-value {
  font-family: var(--mono);
  font-size: 1.15rem;
  font-weight: 600;
}
.plan-summary .stat-value.is-warn { color: var(--warn); }
.plan-summary .stat-value.is-bad { color: var(--bad); }

/* ---------- Plan tree ---------- */

.plan-tree { margin: 1rem 0 2rem; }

.plan-node { margin: 0.4rem 0; }

/* Indentazione dei figli con guida verticale */
.plan-node .plan-children {
  margin-left: 1.4rem;
  padding-left: 1rem;
  border-left: 2px solid var(--border);
}

.node-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.node-card.severity-warn { border-left: 3px solid var(--warn); }
.node-card.severity-bad { border-left: 3px solid var(--bad); }

.node-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.85rem;
  cursor: pointer;
  user-select: none;
}
.node-header:hover { background: var(--bg-inset); }

.node-toggle {
  flex: none;
  width: 1.1rem;
  color: var(--text-muted);
  font-family: var(--mono);
  font-size: 0.8rem;
  text-align: center;
}

.node-title {
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
}
.node-title .node-relation { color: var(--text-muted); font-weight: 400; }

.node-badges { display: flex; gap: 0.35rem; flex-wrap: wrap; }

.badge {
  font-size: 0.7rem;
  font-weight: 600;
  border-radius: 999px;
  padding: 0.1rem 0.55rem;
  white-space: nowrap;
}
.badge-warn { background: var(--badge-warn-bg); color: var(--warn); border: 1px solid var(--warn); }
.badge-bad { background: var(--badge-bad-bg); color: var(--bad); border: 1px solid var(--bad); }
.badge-muted { background: var(--bg-inset); color: var(--text-muted); border: 1px solid var(--border); }

.node-timing {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex: none;
}

.time-bar {
  width: 140px;
  height: 8px;
  background: var(--bg-inset);
  border-radius: 4px;
  overflow: hidden;
}
.time-bar-fill { height: 100%; border-radius: 4px; min-width: 1px; }

.node-time {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  min-width: 110px;
  text-align: right;
}

.node-details {
  border-top: 1px solid var(--border);
  padding: 0.6rem 0.85rem 0.75rem;
  font-size: 0.85rem;
}

.node-details dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.15rem 1rem;
  margin: 0;
}
.node-details dt { color: var(--text-muted); }
.node-details dd { margin: 0; font-family: var(--mono); overflow-wrap: anywhere; }
.node-details dd.est-off { color: var(--warn); font-weight: 600; }

.node-warnings { margin: 0.6rem 0 0; padding: 0; list-style: none; }
.node-warnings li {
  display: flex;
  gap: 0.5rem;
  align-items: baseline;
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  margin-top: 0.3rem;
  background: var(--bg-inset);
  font-size: 0.85rem;
}
.node-warnings li .warn-icon { flex: none; }
.node-warnings li.level-warn .warn-icon { color: var(--warn); }
.node-warnings li.level-bad .warn-icon { color: var(--bad); }
.node-warnings li .warn-hint { color: var(--text-muted); }

.plan-node.collapsed > .node-card .node-details { display: none; }
.plan-node.children-collapsed > .plan-children { display: none; }

.collapsed-count {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-style: italic;
}

/* ---------- Prose / SEO content ---------- */

.prose { max-width: 760px; }
.prose h2 { border-bottom: 1px solid var(--border); padding-bottom: 0.3rem; }
.prose ul li { margin: 0.3rem 0; }
.prose .example-note { color: var(--text-muted); font-size: 0.9rem; }

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 3rem;
  padding: 1.5rem 0 2rem;
  color: var(--text-muted);
  font-size: 0.875rem;
}
.site-footer .container { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; }

/* ---------- Responsive ---------- */

@media (max-width: 720px) {
  .node-timing { display: none; }
  .node-title { white-space: normal; }
  .plan-summary { gap: 1rem; }
}