/* Noba legal site — minimal, readable, GitHub-README-ish */

:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --fg-muted: #555c66;
  --border: #e4e8ee;
  --link: #2b6ef5;
  --link-hover: #1a4fc9;
  --code-bg: #f4f6f9;
  --card-bg: #fafbfc;
  --heading-grad-a: #2b6ef5;
  --heading-grad-b: #8ab4ff;
  --max: 720px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1014;
    --fg: #e6e9ef;
    --fg-muted: #9aa3b2;
    --border: #222832;
    --link: #6ea2ff;
    --link-hover: #a7c3ff;
    --code-bg: #151922;
    --card-bg: #151922;
    --heading-grad-a: #6ea2ff;
    --heading-grad-b: #a7c3ff;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC",
    "Microsoft JhengHei", "Noto Sans TC", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  scroll-behavior: smooth;
}

/* ===== Header / Nav ===== */
.site-header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
  backdrop-filter: saturate(180%) blur(6px);
}

.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.3px;
  color: var(--fg);
  text-decoration: none;
}
.brand:hover { color: var(--link); }

.nav-links {
  display: flex;
  gap: 18px;
  font-size: 14px;
}
.nav-links a {
  color: var(--fg-muted);
  text-decoration: none;
}
.nav-links a:hover {
  color: var(--link);
}

/* ===== Main content ===== */
.content {
  max-width: var(--max);
  margin: 0 auto;
  padding: 36px 20px 60px;
  word-wrap: break-word;
}

.content p, .content li {
  color: var(--fg);
}

.content a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.content a:hover {
  color: var(--link-hover);
}

.content h1, .content h2, .content h3, .content h4 {
  line-height: 1.3;
  margin-top: 2em;
  margin-bottom: 0.6em;
  font-weight: 700;
  scroll-margin-top: 80px;
}

.content h1 {
  font-size: 1.9rem;
  margin-top: 0.2em;
  padding-bottom: 0.3em;
  border-bottom: 2px solid transparent;
  border-image: linear-gradient(90deg, var(--heading-grad-a), var(--heading-grad-b)) 1;
}

.content h2 {
  font-size: 1.45rem;
  padding-bottom: 0.25em;
  border-bottom: 1px solid transparent;
  border-image: linear-gradient(90deg, var(--heading-grad-a), var(--heading-grad-b)) 1;
}

.content h3 {
  font-size: 1.15rem;
  color: var(--fg);
}

.content h4 {
  font-size: 1rem;
  color: var(--fg-muted);
}

.content blockquote {
  margin: 1.2em 0;
  padding: 0.6em 1em;
  border-left: 4px solid var(--link);
  background: var(--card-bg);
  color: var(--fg-muted);
  border-radius: 4px;
}

.content ul, .content ol {
  padding-left: 1.6em;
}
.content li + li { margin-top: 0.25em; }

.content hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2.4em 0;
}

.content code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.9em;
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
}

.content pre {
  background: var(--code-bg);
  padding: 14px 16px;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 0.9em;
}
.content pre code {
  background: transparent;
  padding: 0;
}

.content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.2em 0;
  font-size: 0.95em;
}
.content th, .content td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}
.content th {
  background: var(--card-bg);
  font-weight: 600;
}

.content strong { color: var(--fg); }

.lead {
  font-size: 1.05rem;
  color: var(--fg-muted);
}

/* ===== Cards (index page) ===== */
.card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 1.5em 0 2em;
}

.card {
  display: block;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card-bg);
  color: var(--fg);
  text-decoration: none !important;
  transition: border-color 0.15s ease, transform 0.1s ease;
}
.card:hover {
  border-color: var(--link);
  transform: translateY(-1px);
}
.card h3 {
  margin: 0 0 4px;
  font-size: 1.05rem;
  color: var(--fg);
}
.card p {
  margin: 0;
  color: var(--fg-muted);
  font-size: 0.92rem;
}

@media (max-width: 560px) {
  .card-grid { grid-template-columns: 1fr; }
}

/* ===== Lang switcher ===== */
.lang-switcher {
  max-width: var(--max);
  margin: 8px auto 0;
  padding: 0 20px;
  text-align: center;
  color: var(--fg-muted);
  font-size: 14px;
}
.lang-switcher a {
  color: var(--link);
  text-decoration: none;
  padding: 0 6px;
}
.lang-switcher a:hover { text-decoration: underline; }

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 40px;
  padding: 20px;
  text-align: center;
  color: var(--fg-muted);
  font-size: 13px;
}
.site-footer a {
  color: var(--fg-muted);
  text-decoration: underline;
}
.site-footer a:hover { color: var(--link); }

/* ===== Mobile tweaks ===== */
@media (max-width: 520px) {
  body { font-size: 15.5px; }
  .content { padding: 24px 16px 48px; }
  .nav { padding: 12px 16px; }
  .nav-links { gap: 12px; }
  .content h1 { font-size: 1.6rem; }
  .content h2 { font-size: 1.25rem; }
}