/* ─── PileStack Blog — shared stylesheet ─────────────────────────────── */

/* Design tokens (mirror main site) */
:root {
  --green:       #1D9E75;
  --green-dark:  #116048;
  --green-light: #27C48F;
  --green-bg:    #E8F8F1;
  --amber:       #C4820A;
  --amber-bg:    #FDF3DC;
  --text:        #1A1916;
  --text-sec:    #6B6760;
  --text-ter:    #B0ADA6;
  --bg:          #F6F4EF;
  --card:        #FFFFFF;
  --border:      #E4E1DA;
  --border-str:  #C8C5BE;

  --font-display: 'Fraunces', Georgia, serif;
  --font-body:    'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Mono', 'Cascadia Code', monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.05);
  --shadow-lg: 0 8px 24px rgba(0,0,0,.10), 0 4px 8px rgba(0,0,0,.06);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Nav ── */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(246,244,239,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1160px; margin: 0 auto; padding: 0 24px;
  height: 60px; display: flex; align-items: center;
  justify-content: space-between; gap: 24px;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-style: italic;
  font-size: 20px; font-weight: 600; color: var(--green-dark);
  white-space: nowrap;
}
.nav-logo img { border-radius: 7px; flex-shrink: 0; }
.nav-logo:hover { text-decoration: none; color: var(--green); }
.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-links a {
  font-size: 14px; font-weight: 500; color: var(--text-sec);
  padding: 7px 14px; border-radius: var(--radius-sm);
  transition: background .15s, color .15s;
}
.nav-links a:hover { background: rgba(0,0,0,.04); color: var(--text); text-decoration: none; }
.nav-links a.active { color: var(--green); background: var(--green-bg); }
.nav-cta {
  display: flex; align-items: center; gap: 8px;
}
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 10px 20px; border-radius: var(--radius-lg);
  font-family: var(--font-body); font-size: 14px; font-weight: 600;
  line-height: 1; cursor: pointer; border: none; white-space: nowrap;
  transition: transform .15s, box-shadow .15s, background .15s;
}
.btn:active { transform: scale(.97); }
.btn-primary {
  background: var(--green); color: #fff;
  box-shadow: 0 2px 8px rgba(29,158,117,.28);
}
.btn-primary:hover { background: var(--green-dark); transform: translateY(-1px); text-decoration: none; }
.btn-sm { padding: 8px 16px; font-size: 13px; }

/* Hamburger */
.nav-hamburger {
  display: none; flex-direction: column; gap: 5px;
  padding: 8px; cursor: pointer; background: none; border: none;
}
.nav-hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--text); border-radius: 2px;
  transition: transform .25s, opacity .25s;
}
.nav-mobile {
  display: none; flex-direction: column;
  padding: 8px 24px 16px; border-top: 1px solid var(--border);
  background: rgba(246,244,239,.97); gap: 2px;
}
.nav-mobile a {
  font-size: 15px; font-weight: 500; color: var(--text-sec);
  padding: 10px 8px; border-radius: var(--radius-sm);
}
.nav-mobile a.active { color: var(--green); }
.nav-mobile a:hover { color: var(--text); text-decoration: none; }
.nav-mobile .btn { justify-content: center; margin-top: 8px; }

/* ── Tag pill ── */
.tag {
  display: inline-flex; align-items: center;
  font-size: 11px; font-weight: 700; letter-spacing: .8px;
  text-transform: uppercase; padding: 4px 10px;
  border-radius: 100px; line-height: 1;
  border: 1px solid transparent;
}
.tag-tips        { background: var(--green-bg);  color: var(--green-dark); border-color: rgba(29,158,117,.2); }
.tag-updates     { background: #EEF0FF;            color: #3B46CC;           border-color: rgba(59,70,204,.2); }
.tag-productivity{ background: var(--amber-bg);   color: var(--amber);      border-color: rgba(196,130,10,.2); }
.tag-story       { background: #FDE8F0;            color: #C0366A;           border-color: rgba(192,54,106,.2); }

/* ── Footer ── */
.footer {
  background: var(--text); color: rgba(255,255,255,.55);
  padding: 40px 24px 28px;
}
.footer-inner {
  max-width: 1160px; margin: 0 auto;
  display: flex; align-items: center;
  justify-content: space-between; flex-wrap: wrap; gap: 16px;
}
.footer-logo {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-display); font-style: italic;
  font-size: 18px; font-weight: 600; color: #fff;
}
.footer-logo img { border-radius: 6px; opacity: .9; }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-links a { font-size: 13px; color: rgba(255,255,255,.55); }
.footer-links a:hover { color: #fff; text-decoration: none; }
.footer-copy { font-size: 12px; width: 100%; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.08); }

/* ── Utilities ── */
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.eyebrow {
  font-size: 11px; font-weight: 700; letter-spacing: 1.4px;
  text-transform: uppercase; color: var(--green);
}
.fade-in { opacity: 0; transform: translateY(18px); transition: opacity .55s ease, transform .55s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 640px) {
  .nav-links, .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
}