:root {
  /* Colours — dark default, navy + green */
  --bg: #0B1120;
  --bg-card: #111827;
  --bg-elevated: #1F2937;
  --border: #374151;
  --border-hover: #4B5563;
  --text: #E5E7EB;
  --text-muted: #9CA3AF;
  --text-bright: #F9FAFB;
  --accent: #10B981;
  --accent-hover: #059669;
  --accent-muted: rgba(16,185,129,.15);
  --amber: #F59E0B;
  --amber-bg: rgba(245,158,11,.15);
  --red: #EF4444;
  --green: #10B981;
  --green-bg: rgba(16,185,129,.1);
  /* Typography */
  --sans: 'Archivo', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  /* Spacing (4px base) */
  --sp-1: 4px; --sp-2: 8px; --sp-3: 12px; --sp-4: 16px; --sp-5: 20px;
  --sp-6: 24px; --sp-8: 32px; --sp-10: 40px; --sp-12: 48px; --sp-16: 64px; --sp-20: 80px; --sp-25: 100px;
  /* Radii */
  --radius-sm: 6px; --radius-md: 8px; --radius-lg: 12px; --radius-xl: 16px; --radius-pill: 20px;
  /* Shadows */
  --shadow-card-hover: 0 8px 24px rgba(0,0,0,.3);
  --shadow-glow-accent: 0 0 40px rgba(16,185,129,.1);
  --shadow-glow-accent-hover: 0 0 60px rgba(16,185,129,.15);
  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 150ms; --dur-norm: 200ms; --dur-slow: 300ms;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--sans);line-height:1.6;-webkit-font-smoothing:antialiased}

/* NAV */
nav{background:rgba(11,17,32,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);padding:16px 48px;display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;z-index:100}
.nav-logo{font-size:22px;font-weight:300;color:var(--text-bright);letter-spacing:-.5px;text-decoration:none}
.nav-logo strong{font-weight:700;color:var(--accent)}
.nav-links{display:flex;gap:32px;align-items:center;list-style:none}
.nav-links a{color:var(--text-muted);text-decoration:none;font-size:14px;transition:color .2s}
.nav-links a:hover{color:var(--text-bright)}
.nav-links a.btn-p{color:#000}

/* BUTTONS */
.btn-p,.btn-g,.btn-dl{transition:background var(--dur-norm) var(--ease-out),border-color var(--dur-norm) var(--ease-out),color var(--dur-norm) var(--ease-out),transform var(--dur-fast) var(--ease-out),box-shadow var(--dur-norm) var(--ease-out)}
.btn-p{background:var(--accent);color:#000;padding:10px 24px;border-radius:8px;font-weight:600;font-size:14px;text-decoration:none;display:inline-block;border:none;cursor:pointer}
.btn-p:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 4px 16px rgba(232,98,76,.25)}
.btn-g{border:1px solid var(--border);color:var(--text);padding:10px 24px;border-radius:8px;font-weight:500;font-size:14px;text-decoration:none;display:inline-block}
.btn-g:hover{border-color:var(--text-muted);color:var(--text-bright);transform:translateY(-1px)}
.btn-dl{background:var(--bg-elevated);border:1px solid var(--border);color:var(--text);padding:10px 20px;border-radius:8px;font-weight:500;font-size:13px;text-decoration:none;display:inline-flex;align-items:center;gap:8px}
.btn-dl:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}

/* LAYOUT */
section{max-width:1200px;margin:0 auto;padding:80px 48px}
.divider{border:0;border-top:1px solid var(--border);margin:0 auto;max-width:1296px}
.eyebrow{font-size:13px;font-weight:600;color:var(--accent);text-transform:uppercase;letter-spacing:1px;margin-bottom:12px}
h1{font-size:56px;font-weight:700;color:var(--text-bright);line-height:1.1;letter-spacing:-1.5px;margin-bottom:20px}
h2{font-size:40px;font-weight:700;color:var(--text-bright);line-height:1.15;letter-spacing:-1px;margin-bottom:16px}
h3{font-size:20px;font-weight:600;color:var(--text-bright);margin-bottom:8px}
.sub{font-size:18px;color:var(--text-muted);max-width:640px;line-height:1.7;margin-bottom:32px}

/* FOOTER */
footer{border-top:1px solid var(--border);padding:48px;max-width:1200px;margin:0 auto;text-align:center}
.ft-logo{font-size:20px;font-weight:300;color:var(--text-bright);margin-bottom:16px}
.ft-logo strong{font-weight:700;color:var(--accent)}
.ft-links{display:flex;gap:24px;justify-content:center;margin-bottom:16px}
.ft-links a{color:var(--text-muted);text-decoration:none;font-size:14px}
.ft-links a:hover{color:var(--text-bright)}
.ft-email{color:var(--accent);text-decoration:none;font-size:14px;display:block;margin-bottom:24px}
.ft-disc{font-size:12px;color:var(--text-muted);max-width:600px;margin:0 auto 16px;line-height:1.6}
.ft-copy{font-size:12px;color:var(--text-muted)}
.ft-copy a{color:var(--text-muted);text-decoration:none}

/* Mobile nav */
.nav-mob{display:none;align-items:center;gap:12px}
.nav-mob a{color:var(--text-muted);text-decoration:none;font-size:14px}
.nav-mob a.btn-p{color:#1A1512}
.burger{background:none;border:1px solid var(--border);border-radius:6px;padding:8px;cursor:pointer;color:var(--text-muted);display:flex;align-items:center;justify-content:center}
.burger svg{width:18px;height:18px}
.mob-menu{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:var(--bg);z-index:200;flex-direction:column;align-items:center;justify-content:center;gap:24px}
.mob-menu.open{display:flex}
.mob-menu a{color:var(--text);text-decoration:none;font-size:18px;font-weight:500}
.mob-menu a.btn-p{color:#1A1512;margin-top:8px}
.mob-close{position:absolute;top:16px;right:24px;background:none;border:none;color:var(--text-muted);font-size:28px;cursor:pointer;padding:8px}

/* DARK THEME */
[data-theme="light"]{
  --bg:#FBFAF6;--bg-card:#FFFFFF;--bg-elevated:#F1F5F2;--border:#E5E7EB;--border-hover:#D1D5DB;
  --text:#374151;--text-muted:#6B7280;--text-bright:#111827;--accent:#10B981;--accent-hover:#059669;
  --accent-muted:rgba(16,185,129,.12);--amber:#D97706;--amber-bg:rgba(217,119,6,.12);--red:#DC2626;
  --green:#10B981;--green-bg:rgba(16,185,129,.1);
  --shadow-card-hover:0 8px 24px rgba(0,0,0,.08);--shadow-glow-accent:0 0 40px rgba(16,185,129,.06);--shadow-glow-accent-hover:0 0 60px rgba(16,185,129,.1);
}
[data-theme="light"] nav{background:rgba(251,250,246,.95)}

/* Theme toggle button */
.theme-toggle{background:none;border:1px solid var(--border);border-radius:8px;padding:8px;cursor:pointer;color:var(--text-muted);display:flex;align-items:center;justify-content:center;transition:border-color .2s,color .2s}
.theme-toggle:hover{border-color:var(--accent);color:var(--text-bright)}
.theme-toggle svg{width:18px;height:18px}
.theme-toggle .icon-sun{display:none}
[data-theme="light"] .theme-toggle .icon-moon{display:none}
[data-theme="light"] .theme-toggle .icon-sun{display:block}

/* AA products bar */
.aa-bar{display:flex;align-items:center;justify-content:center;gap:24px;padding:20px 0;margin-top:20px;border-top:1px solid rgba(255,255,255,.06);flex-wrap:wrap}
[data-theme="light"] .aa-bar{border-color:rgba(0,0,0,.06)}
.aa-bar{border-color:rgba(255,255,255,.06)}
.aa-bar .aa-label{font-size:11px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.08em;font-weight:600}
.aa-bar a{font-size:13px;color:var(--text-muted);text-decoration:none;padding:4px 12px;border:1px solid var(--border);border-radius:6px;transition:border-color .2s,color .2s}
.aa-bar a:hover{border-color:var(--accent);color:var(--accent)}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important}
  html{scroll-behavior:auto}
}

@media(max-width:768px){
  nav{padding:16px 24px}
  .nav-links{display:none}
  .nav-mob{display:flex !important}
  h1{font-size:36px;letter-spacing:-1px}
  h2{font-size:28px;letter-spacing:-.5px}
  section{padding:48px 24px}
}

/* ===== BLOG INDEX ===== */
.blog-header{max-width:1200px;margin:0 auto;padding:80px 48px 40px}
.blog-header h1{font-size:48px}
.blog-header p{font-size:18px;color:var(--text-muted);max-width:640px}

.tabs{max-width:1200px;margin:0 auto;padding:0 48px 32px;display:flex;gap:8px;flex-wrap:wrap}
.tab{padding:8px 20px;border-radius:20px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s;border:1px solid var(--border);color:var(--text-muted);background:transparent}
.tab:hover{border-color:var(--border-hover);color:var(--text-bright)}
.tab.active{background:var(--accent);color:#000;border-color:var(--accent);font-weight:600}

.posts-grid{max-width:1200px;margin:0 auto;padding:0 48px 80px;display:grid;grid-template-columns:repeat(3,1fr);gap:24px}

.post-card{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;overflow:hidden;transition:border-color var(--dur-norm) var(--ease-out),box-shadow var(--dur-slow) var(--ease-out),transform var(--dur-norm) var(--ease-out);cursor:pointer;text-decoration:none;display:block;color:inherit}
.post-card:hover{border-color:var(--border-hover);transform:translateY(-2px);box-shadow:var(--shadow-card-hover)}
.post-card img{width:100%;height:200px;object-fit:cover;display:block}
.card-body{padding:20px}
.card-category{font-size:12px;font-weight:600;color:var(--accent);text-transform:uppercase;letter-spacing:1px;margin-bottom:8px}
.card-title{font-size:18px;font-weight:600;color:var(--text-bright);line-height:1.3;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-excerpt{font-size:14px;color:var(--text-muted);line-height:1.5;margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{font-size:13px;color:var(--text-muted);display:flex;align-items:center;gap:8px}
.card-meta svg{width:14px;height:14px;opacity:.5}

.pagination{max-width:1200px;margin:0 auto;padding:0 48px 80px;display:flex;justify-content:center;gap:8px}
.page-btn{width:40px;height:40px;border-radius:8px;border:1px solid var(--border);background:transparent;color:var(--text-muted);font-size:14px;font-weight:500;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}
.page-btn:hover{border-color:var(--border-hover);color:var(--text-bright)}
.page-btn.active{background:var(--accent);color:#000;border-color:var(--accent)}
.page-btn:disabled{opacity:.3;cursor:default}

/* ===== BLOG POST ===== */
.article-header{max-width:720px;margin:0 auto;padding:80px 24px 0}
.article-header .card-category{margin-bottom:0}
.article-meta-row{display:flex;align-items:center;gap:8px;margin-bottom:4px;flex-wrap:wrap}
.article-header h1{font-size:40px;margin-top:12px;margin-bottom:16px}
.author-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:32px;flex-wrap:wrap;gap:12px}
.author-info{display:flex;align-items:center;gap:12px}
.author-avatar{width:40px;height:40px;border-radius:50%;background:var(--accent);color:#000;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px}
.author-name{font-size:14px;font-weight:600;color:var(--text-bright)}
.author-role{font-size:13px;color:var(--text-muted)}
.share-btn{background:none;border:1px solid var(--border);border-radius:8px;padding:8px 16px;color:var(--text-muted);font-size:13px;cursor:pointer;display:flex;align-items:center;gap:6px;transition:all .2s}
.share-btn:hover{border-color:var(--accent);color:var(--accent)}
.share-btn svg{width:14px;height:14px}

.article-hero{max-width:720px;margin:0 auto;padding:0 24px}
.article-hero img{width:100%;height:auto;border-radius:12px;display:block}

.article-body{max-width:720px;margin:0 auto;padding:40px 24px 0;font-size:17px;line-height:1.8;color:var(--text)}
.article-body h2{font-size:28px;margin-top:48px;margin-bottom:16px}
.article-body h3{font-size:22px;margin-top:32px;margin-bottom:12px}
.article-body p{margin-bottom:20px}
.article-body ul,.article-body ol{margin-bottom:20px;padding-left:24px}
.article-body li{margin-bottom:8px;color:var(--text-muted)}
.article-body a{color:var(--accent);text-decoration:underline;text-underline-offset:2px}
.article-body a:hover{color:var(--accent-hover)}
.article-body blockquote{border-left:3px solid var(--accent);padding:16px 24px;margin:24px 0;background:var(--bg-card);border-radius:0 8px 8px 0;font-style:italic;color:var(--text-muted)}
.article-body code{font-family:var(--mono);font-size:14px;background:var(--bg-elevated);padding:2px 6px;border-radius:4px;color:var(--accent)}
.article-body pre{background:var(--bg-card);border:1px solid var(--border);border-radius:8px;padding:20px;overflow-x:auto;margin:24px 0}
.article-body pre code{background:none;padding:0;font-size:14px;color:var(--text)}
.article-body em{font-style:italic;color:var(--text-muted)}

.article-disclaimer{max-width:720px;margin:0 auto;padding:32px 24px 0;font-size:13px;color:var(--text-muted);line-height:1.6;border-top:1px solid var(--border);padding-top:24px}

.article-cta{max-width:720px;margin:32px auto 0;padding:0 24px}
.article-cta-inner{background:var(--accent-muted);border:1px solid rgba(16,185,129,.2);border-radius:16px;padding:40px;text-align:center}
.article-cta-inner h3{font-size:22px;margin-bottom:8px}
.article-cta-inner p{font-size:15px;color:var(--text-muted);margin-bottom:20px}

.recommended{max-width:1200px;margin:0 auto;padding:64px 48px 80px}
.recommended h2{font-size:28px;margin-bottom:24px}
.recommended-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}

/* ===== BLOG RESPONSIVE ===== */
@media(max-width:768px){
  .blog-header{padding:60px 24px 32px}
  .blog-header h1{font-size:36px}
  .tabs{padding:0 24px 24px}
  .posts-grid{grid-template-columns:1fr;padding:0 24px 60px}
  .pagination{padding:0 24px 60px}
  .article-header{padding:60px 20px 0}
  .article-header h1{font-size:32px}
  .article-hero{padding:0 20px}
  .article-body{padding:32px 20px 0}
  .article-disclaimer{padding:24px 20px 0}
  .article-cta{padding:0 20px}
  .recommended{padding:48px 24px 60px}
  .recommended-grid{grid-template-columns:1fr}
  .post-card:hover{transform:none}
}