/* Nooklance — base stylesheet
   System-font stack only: no external font requests, keeps pages fast. */

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f6f7fb;
  --color-text: #1c1f2a;
  --color-text-muted: #5a6072;
  --color-primary: #4338ca;
  --color-primary-dark: #322a9e;
  --color-accent: #14b8a6;
  --color-border: #e4e6ef;
  --max-width: 1100px;
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  font-size: 17px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: 18px 0;
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(6px);
  z-index: 10;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

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

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 0;
}

.main-nav a {
  color: var(--color-text);
  font-weight: 500;
  font-size: 15px;
}

.main-nav a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

/* Hero */
.hero {
  background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
  padding: 64px 0 48px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.15;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 19px;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto;
}

/* Article grid / cards */
.section {
  padding: 48px 0;
}

.section-title {
  font-size: 26px;
  margin-bottom: 28px;
  letter-spacing: -0.01em;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--color-bg);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.card:hover {
  box-shadow: 0 8px 24px rgba(28, 31, 42, 0.08);
  transform: translateY(-2px);
}

.card .tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-accent);
  margin-bottom: 10px;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 19px;
  line-height: 1.35;
}

.card h3 a {
  color: var(--color-text);
}

.card p {
  color: var(--color-text-muted);
  font-size: 15px;
  margin: 0 0 12px;
}

.card .read-more {
  font-size: 14px;
  font-weight: 600;
}

/* Article page */
.article-header {
  padding: 48px 0 24px;
  border-bottom: 1px solid var(--color-border);
}

.article-header .tag {
  color: var(--color-accent);
  font-weight: 700;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.article-header h1 {
  font-size: clamp(26px, 4vw, 38px);
  margin: 14px 0 10px;
  letter-spacing: -0.02em;
}

.article-meta {
  color: var(--color-text-muted);
  font-size: 14px;
}

.article-body {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 24px 20px;
  font-size: 18px;
}

.article-body h2 {
  font-size: 24px;
  margin: 40px 0 16px;
  letter-spacing: -0.01em;
}

.article-body h3 {
  font-size: 20px;
  margin: 32px 0 12px;
}

.article-body p {
  margin: 0 0 20px;
}

.article-body ul,
.article-body ol {
  margin: 0 0 20px;
  padding-left: 24px;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body blockquote {
  border-left: 3px solid var(--color-primary);
  margin: 28px 0;
  padding: 4px 20px;
  color: var(--color-text-muted);
  font-style: italic;
}

.callout {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin: 28px 0;
  font-size: 16px;
}

.callout strong {
  display: block;
  margin-bottom: 6px;
  color: var(--color-primary-dark);
}

.disclosure {
  font-size: 14px;
  color: var(--color-text-muted);
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin: 24px 0 0;
}

/* Simple page (about/contact/legal) */
.page-body {
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 24px 60px;
}

.page-body h1 {
  font-size: 32px;
  margin: 0 0 24px;
  letter-spacing: -0.02em;
}

.page-body h2 {
  font-size: 22px;
  margin: 32px 0 12px;
}

.page-body p {
  margin: 0 0 18px;
  color: var(--color-text);
}

.page-body ul {
  padding-left: 22px;
  margin: 0 0 18px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 36px 0;
  margin-top: 40px;
  background: var(--color-bg-alt);
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin: 0;
  padding: 0;
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: 14px;
}

.footer-note {
  font-size: 13px;
  color: var(--color-text-muted);
  width: 100%;
  margin-top: 8px;
}

/* CTA button */
.btn {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  margin-top: 20px;
}

.btn:hover {
  background: var(--color-primary-dark);
  text-decoration: none;
}

/* Ad slot placeholders */
.ad-slot {
  max-width: 760px;
  margin: 32px auto;
  padding: 12px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 12px;
  border: 1px dashed var(--color-border);
  border-radius: 8px;
}

@media (max-width: 640px) {
  .main-nav ul {
    gap: 16px;
  }
  .hero {
    padding: 44px 0 32px;
  }
  .section {
    padding: 32px 0;
  }
}