/* Power BI Tutorials — 工具页共用样式（与站点 token 对齐） */

:root {
  --t-bg: #ffffff;
  --t-bg-soft: #f8f9fb;
  --t-bg-elevated: #f5f4ee;
  --t-border: #e5e3d8;
  --t-text: #1a1a1a;
  --t-text-muted: #4a4a4a;
  --t-text-dim: #777;
  --t-accent: #f2c811;
  --t-accent-hover: #e0b90f;
  --t-accent-soft: #fffbea;
  --t-accent-border: #f2c811;
  --t-accent-dark: #8a6d0a;
  --t-code-bg: #252423;
  --t-code-text: #e8e6e3;
  --radius: 8px;
  --radius-lg: 12px;
  --t-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --t-font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

.tool-page {
  margin: 0;
  font-family: var(--t-font-sans);
  color: var(--t-text);
  background: var(--t-bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--t-accent-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  border-bottom: 1px solid var(--t-border);
  background: var(--t-bg);
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-header .inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--t-text);
}
.logo-mark {
  background: var(--t-accent);
  color: #1a1a1a;
  border-radius: 5px;
  padding: 2px 7px;
  font-weight: 900;
}
.site-nav { margin-left: auto; display: flex; gap: 16px; font-size: 13.5px; font-weight: 600; }
.site-nav a { color: var(--t-text-muted); }
.site-nav a:hover { color: var(--t-text); text-decoration: none; }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 20px; }

.hero { padding: 30px 0 18px; }
.hero .eyebrow {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--t-accent-dark);
  background: var(--t-accent-soft);
  border: 1px solid var(--t-accent-border);
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.hero h1 { font-size: clamp(26px, 3.4vw, 38px); line-height: 1.15; letter-spacing: -0.03em; margin: 0 0 10px; }
.hero p { margin: 0; color: var(--t-text-muted); max-width: 720px; font-size: 15.5px; }

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 18px;
  padding: 18px 0 40px;
  align-items: start;
}
.layout.single { grid-template-columns: 1fr; }

.panel {
  border: 1px solid var(--t-border);
  border-radius: var(--radius-lg);
  background: var(--t-bg);
  overflow: hidden;
}
.panel-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--t-border);
  background: var(--t-bg-soft);
  font-size: 13px;
  font-weight: 700;
}
.panel-head .spacer { margin-left: auto; }
.panel-body { padding: 14px; }

textarea.code-input {
  width: 100%;
  min-height: 360px;
  resize: vertical;
  border: 1px solid var(--t-border);
  border-radius: var(--radius);
  padding: 12px 14px;
  font-family: var(--t-font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--t-text);
  background: #fcfcfb;
  tab-size: 4;
}
textarea.code-input:focus { outline: 2px solid var(--t-accent); outline-offset: -1px; }

pre.code-output {
  margin: 0;
  min-height: 360px;
  max-height: 620px;
  overflow: auto;
  background: var(--t-code-bg);
  color: var(--t-code-text);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-family: var(--t-font-mono);
  font-size: 12.5px;
  line-height: 1.65;
  white-space: pre;
}
pre.code-output.light {
  background: #fbfbf8;
  color: #23211f;
  border: 1px solid var(--t-border);
}

.btn {
  appearance: none;
  border: 1px solid var(--t-border);
  background: var(--t-bg);
  color: var(--t-text);
  border-radius: var(--radius);
  padding: 7px 13px;
  font-size: 13px;
  font-weight: 650;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover { border-color: #c9c5b6; background: var(--t-bg-soft); }
.btn-primary { background: var(--t-accent); border-color: var(--t-accent); color: #1a1a1a; }
.btn-primary:hover { background: var(--t-accent-hover); border-color: var(--t-accent-hover); }
.btn-ghost { border-color: transparent; color: var(--t-text-muted); }
.btn-ghost:hover { background: var(--t-bg-soft); }

.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 10px; }
.toolbar .spacer { margin-left: auto; }

.stats { display: flex; flex-wrap: wrap; gap: 14px; font-size: 12px; color: var(--t-text-dim); padding: 10px 2px 0; }
.stats b { color: var(--t-text); font-weight: 700; }

.issue {
  border: 1px solid var(--t-border);
  border-left-width: 4px;
  border-radius: var(--radius);
  padding: 11px 13px;
  margin-bottom: 10px;
  background: var(--t-bg);
}
.issue.warn { border-left-color: #e0a80c; background: #fffdf3; }
.issue.info { border-left-color: #7a8aa0; background: #fafbfc; }
.issue.error { border-left-color: #d64545; background: #fff7f7; }
.issue h4 { margin: 0 0 5px; font-size: 13.5px; display: flex; gap: 8px; align-items: baseline; }
.issue .sev {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: 4px;
  background: #eee;
  color: #555;
  flex: none;
}
.issue.warn .sev { background: #fbe8b5; color: #7a5a00; }
.issue.info .sev { background: #e6ebf2; color: #46536a; }
.issue.error .sev { background: #f8d7d7; color: #8c2020; }
.issue p { margin: 0 0 6px; font-size: 13px; color: var(--t-text-muted); }
.issue .fix { font-size: 12.5px; color: #2f5d3a; background: #f2f8f3; border-radius: 5px; padding: 7px 9px; }
.issue .learn { font-size: 12px; font-weight: 600; }

.empty-state { color: var(--t-text-dim); font-size: 13.5px; padding: 16px 4px; }

.cta {
  border: 1px solid var(--t-border);
  background: linear-gradient(180deg, #fffdf4, #fff);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
  margin: 0 0 36px;
}
.cta h3 { margin: 0 0 4px; font-size: 16px; }
.cta p { margin: 0; font-size: 13.5px; color: var(--t-text-muted); }
.cta .btn { margin-left: auto; }

.note {
  font-size: 12.5px;
  color: var(--t-text-dim);
  border-top: 1px solid var(--t-border);
  padding-top: 10px;
  margin-top: 10px;
}

details.faq { border-top: 1px solid var(--t-border); padding: 14px 0; }
details.faq summary { cursor: pointer; font-weight: 700; font-size: 14.5px; list-style: none; }
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::before { content: "+ "; color: var(--t-accent-dark); font-weight: 800; }
details.faq[open] summary::before { content: "− "; }
details.faq p { color: var(--t-text-muted); font-size: 14px; margin: 8px 0 0; }

.field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 16px; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field label { font-size: 12.5px; font-weight: 700; color: var(--t-text-muted); }
.field input[type="text"], .field input[type="number"], .field input[type="date"], .field select {
  padding: 8px 10px;
  border: 1px solid var(--t-border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 13.5px;
  color: var(--t-text);
  background: #fff;
}
.field input:focus, .field select:focus { outline: 2px solid var(--t-accent); outline-offset: -1px; }
.field .hint { font-size: 11.5px; color: var(--t-text-dim); }
.checks { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 14px; }
.checks label { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--t-text-muted); }

.tabs { display: flex; gap: 4px; }
.tab {
  border: 1px solid transparent;
  background: transparent;
  padding: 5px 11px;
  border-radius: 6px;
  font-size: 12.5px;
  font-weight: 650;
  cursor: pointer;
  color: var(--t-text-muted);
  font-family: inherit;
}
.tab[aria-selected="true"] { background: var(--t-accent-soft); border-color: var(--t-accent-border); color: #5c4900; }

.footer { border-top: 1px solid var(--t-border); margin-top: 20px; }
.footer .inner {
  max-width: 1180px; margin: 0 auto; padding: 22px 20px 40px;
  display: flex; flex-wrap: wrap; gap: 12px; align-items: center;
  font-size: 12.5px; color: var(--t-text-dim);
}

pre.code-output.wrap { white-space: pre-wrap; word-break: break-word; }
.field.wide { grid-column: 1 / -1; }
@media (min-width: 901px) {
  .layout > .panel:first-child { position: sticky; top: 72px; }
}

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .field-grid { grid-template-columns: 1fr; }
  .site-nav { display: none; }
  .cta .btn { margin-left: 0; }
}

/* summary + misc */
.summary { font-size: 11.5px; font-weight: 700; color: var(--t-text-dim); }
.summary.has-issues { color: #7a5a00; background: #fdf0cd; padding: 2px 8px; border-radius: 999px; }
.summary.ok { color: #2f6b45; }
pre.code-output.empty { color: #8c8c86; font-style: italic; }
kbd {
  font-family: var(--t-font-mono);
  font-size: 10.5px;
  border: 1px solid var(--t-border);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 1px 5px;
  background: #fff;
  color: var(--t-text-muted);
}
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}