/* ═══════════════════════════════════════
   Claude Skills Hub — Global Styles
   Brand: #10B981 Green | Plus Jakarta Sans + Inter
   ═══════════════════════════════════════ */

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── CSS Variables: Light Mode ── */
:root {
  --green:          #10B981;
  --green-hover:    #07A66E;
  --green-dark:     #059669;
  --green-light:    #D1FAE5;
  --green-xlight:   #ECFDF5;

  --bg:             #FFFFFF;
  --bg-alt:         #F0FDF4;
  --surface:        #FFFFFF;
  --border:         #D1FAE5;
  --border-gray:    #E5E7EB;

  --text:           #111827;
  --text-muted:     #6B7280;
  --text-on-green:  #FFFFFF;

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.07);
  --shadow:     0 4px 12px rgba(16,185,129,0.10), 0 2px 4px rgba(0,0,0,0.05);
  --shadow-lg:  0 16px 40px rgba(16,185,129,0.13), 0 8px 16px rgba(0,0,0,0.07);

  --font-heading: 'Plus Jakarta Sans', sans-serif;
  --font-body:    'Inter', sans-serif;
  --font-code:    'JetBrains Mono', monospace;

  --radius:     14px;
  --radius-sm:  8px;
  --radius-pill:100px;
  --max-width:  1100px;
}

/* ── CSS Variables: Dark Mode ── */
@media (prefers-color-scheme: dark) {
  :root {
    --green:         #10B981;
    --green-hover:   #34D399;
    --green-dark:    #059669;
    --green-light:   #1A3328;
    --green-xlight:  #0F2219;

    --bg:            #0A1A13;
    --bg-alt:        #0F2219;
    --surface:       #0F2219;
    --border:        #1A3328;
    --border-gray:   #1F2937;

    --text:          #F0FDF4;
    --text-muted:    #86EFAC;
    --text-on-green: #FFFFFF;

    --shadow-sm:  0 1px 3px rgba(0,0,0,0.4);
    --shadow:     0 4px 12px rgba(0,0,0,0.4), 0 2px 4px rgba(0,0,0,0.2);
    --shadow-lg:  0 16px 40px rgba(0,0,0,0.5), 0 8px 16px rgba(0,0,0,0.3);
  }
}

/* ── Base ── */
html {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}
body { background: var(--bg); color: var(--text); min-height: 100vh; }
a { color: var(--green); text-decoration: none; }
a:hover { color: var(--green-hover); text-decoration: underline; }
h1,h2,h3,h4,h5 { font-family: var(--font-heading); line-height: 1.2; letter-spacing: -0.03em; }
code, pre { font-family: var(--font-code); }
img { max-width: 100%; display: block; }

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

/* ── Nav ── */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg); border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex; align-items: center;
  justify-content: space-between; height: 64px; gap: 24px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; color: var(--text); }
.nav-logo:hover { text-decoration: none; }
.nav-logo img { width: 32px; height: 32px; }
.nav-logo span { font-family: var(--font-heading); font-size: 1rem; font-weight: 700; }
.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; }
.nav-links a {
  color: var(--text-muted); font-size: 0.875rem; font-weight: 500;
  padding: 6px 12px; border-radius: var(--radius-sm);
  transition: color .15s, background .15s;
}
.nav-links a:hover { color: var(--text); background: var(--bg-alt); text-decoration: none; }
.nav-links .active { color: var(--green); }
.nav-cta {
  background: var(--green) !important; color: white !important;
  padding: 8px 18px !important; border-radius: var(--radius-sm) !important;
  font-weight: 600 !important;
}
.nav-cta:hover { background: var(--green-hover) !important; }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-body); font-size: .95rem; font-weight: 600;
  padding: 12px 24px; border-radius: var(--radius-sm);
  border: none; cursor: pointer; text-decoration: none; transition: all .15s;
}
.btn-primary { background: var(--green); color: white; }
.btn-primary:hover {
  background: var(--green-hover); color: white; text-decoration: none;
  transform: translateY(-2px); box-shadow: var(--shadow);
}
.btn-outline {
  background: transparent; color: var(--text);
  border: 1.5px solid var(--border-gray);
}
.btn-outline:hover {
  background: var(--bg-alt); color: var(--text);
  text-decoration: none; transform: translateY(-1px);
}
.btn-white { background: white; color: #111827; font-weight: 600; }
.btn-white:hover {
  background: #f0fdf4; color: #111827; text-decoration: none;
  transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0,0,0,0.13);
}

/* ── Badge ── */
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--green-xlight); color: var(--green-dark);
  border: 1px solid var(--green-light);
  font-size: .78rem; font-weight: 700; letter-spacing: .06em;
  text-transform: uppercase; padding: 5px 14px;
  border-radius: var(--radius-pill); margin-bottom: 24px;
}
@media (prefers-color-scheme: dark) {
  .badge { color: #34D399; background: rgba(16,185,129,.1); border-color: rgba(16,185,129,.2); }
}
.badge-dot {
  width: 7px; height: 7px; background: var(--green);
  border-radius: 50%; animation: pulse-dot 2.4s infinite;
}
@keyframes pulse-dot {
  0%,100% { opacity:1; transform:scale(1); }
  50% { opacity:.4; transform:scale(.8); }
}

/* ── Cards ── */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow-sm);
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.card:hover {
  transform: translateY(-4px); box-shadow: var(--shadow-lg);
  border-color: var(--green-light);
}
.card-icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.icon-green   { background:#D1FAE5; color:#059669; }
.icon-teal    { background:#CCFBF1; color:#0D9488; }
.icon-emerald { background:#ECFDF5; color:#10B981; }
@media (prefers-color-scheme: dark) {
  .icon-green   { background:#064E3B; color:#34D399; }
  .icon-teal    { background:#042F2E; color:#2DD4BF; }
  .icon-emerald { background:#022C22; color:#6EE7B7; }
}
.card h3 { font-size:1.05rem; font-weight:700; margin-bottom:10px; }
.card p  { font-size:.9rem; color:var(--text-muted); line-height:1.7; margin-bottom:20px; }
.card-link {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: .875rem; font-weight: 600; color: var(--green);
  transition: gap .15s;
}
.card-link:hover { color:var(--green-hover); gap:8px; text-decoration:none; }

/* ── Footer ── */
.footer { border-top: 1px solid var(--border); padding: 28px 0; }
.footer-inner { display:flex; align-items:center; justify-content:center; }
.footer p { font-size:.85rem; color:var(--text-muted); text-align:center; }
.footer a { color:var(--green); }
.footer a:hover { color:var(--green-hover); }

/* ── Skip Link (SEO: Accessibility) ── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  background: var(--green);
  color: white;
  padding: 8px 16px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  font-weight: 600;
  font-size: 0.875rem;
  z-index: 9999;
  text-decoration: none;
  transition: top 0.15s;
}
.skip-link:focus { top: 0; }

/* ── Responsive ── */
@media (max-width:768px) {
  .container { padding:0 16px; }
  .nav-links { display:none; }
}
@media (max-width:480px) { :root { --radius:10px; } }