/* AI Beginners Bible - shared stylesheet
   System fonts only (no fonts.googleapis.com) per blog-seo-geo standard:
   faster, no third-party IP transfer. */
:root{
  --carta:#f2e7d8; --inchiostro:#211c15; --accento:#c95f37; --accento-scuro:#a34a28;
  --crema:#fbf5ec; --riga:#ddcdb6; --ok:#2e7d4f; --grigio:#544a3c; --muto:#8a7c66;
  --display: Georgia, 'Iowan Old Style', 'Palatino Linotype', 'Book Antiqua', serif;
  --testo: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--carta);color:var(--inchiostro);font-family:var(--testo);line-height:1.65;
  background-image:radial-gradient(rgba(33,28,21,.05) 1px,transparent 1px);background-size:26px 26px}
.wrap{max-width:900px;margin:0 auto;padding:0 24px}
img{max-width:100%;display:block}
a{color:var(--accento-scuro)}
header{border-bottom:2px solid var(--inchiostro);background:var(--carta);position:relative;z-index:5}
.mast{display:flex;justify-content:space-between;align-items:center;padding:16px 0;max-width:900px;margin:0 auto;padding-left:24px;padding-right:24px}
.logo{font-family:var(--display);font-weight:700;font-size:1.2rem;text-decoration:none;color:var(--inchiostro)}
.logo em{color:var(--accento);font-style:italic;font-weight:400}
.mast nav a{margin-left:18px;text-decoration:none;color:var(--grigio);font-size:.92rem;font-weight:600}
.mast .cta-mini{background:var(--accento);color:#fff;text-decoration:none;font-weight:700;font-size:.85rem;padding:10px 18px;border-radius:4px;margin-left:18px}
.kicker{display:inline-flex;font-size:.72rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--accento);border:1px solid var(--accento);padding:6px 14px;border-radius:99px;margin-bottom:18px}
h1{font-family:var(--display);font-weight:700;font-size:clamp(1.9rem,4.4vw,2.9rem);line-height:1.12;letter-spacing:-.01em}
h1 em{color:var(--accento);font-style:italic;font-weight:400}
h2{font-family:var(--display);font-weight:700;font-size:clamp(1.35rem,2.6vw,1.7rem);letter-spacing:-.005em;margin:38px 0 12px}
h3{font-family:var(--display);font-weight:700;font-size:1.12rem;margin:22px 0 8px}
p{margin:0 0 16px;color:var(--inchiostro)}
.lead{color:var(--grigio);font-size:1.06rem;max-width:60ch}
.stelle{display:flex;align-items:center;gap:10px;margin:14px 0;font-size:.94rem;color:var(--grigio);flex-wrap:wrap}
.stelle .s{color:var(--accento);letter-spacing:2px;font-size:1.05rem}
.stelle b{color:var(--inchiostro)}
.badge{display:inline-block;background:var(--inchiostro);color:var(--crema);font-size:.7rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;padding:4px 10px;border-radius:3px}
section{padding:40px 0}
.hero-section{padding:56px 0 20px}
.cta-box{background:var(--crema);border:2px solid var(--inchiostro);border-radius:10px;padding:26px;margin:30px 0;box-shadow:6px 6px 0 rgba(33,28,21,.1)}
.cta-box h3{margin-top:0}
.cta-box p{color:var(--grigio);margin-bottom:16px}
.btn{display:inline-block;background:var(--accento);color:#fff !important;text-decoration:none;font-weight:800;font-size:1rem;
  padding:14px 26px;border-radius:5px;box-shadow:4px 4px 0 var(--inchiostro);transition:transform .12s,box-shadow .12s}
.btn:hover{transform:translate(2px,2px);box-shadow:2px 2px 0 var(--inchiostro)}
.micro{font-size:.78rem;color:var(--muto);margin-top:10px}
.disclosure{font-size:.82rem;color:var(--muto);background:#fff9f1;border:1px dashed var(--riga);border-radius:6px;padding:12px 14px;margin:18px 0}
.faq dt{font-family:var(--display);font-weight:700;font-size:1.05rem;margin-top:20px;color:var(--inchiostro)}
.faq dd{margin:8px 0 0;color:var(--grigio)}
.limits{border-left:3px solid var(--accento);padding-left:16px;color:var(--grigio);margin:20px 0}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin:24px 0}
.card{background:var(--crema);border:1px solid var(--riga);border-radius:8px;padding:20px}
.card h3{margin-top:0;font-size:1.02rem}
.card p{font-size:.92rem;color:var(--grigio);margin-bottom:10px}
.card a{font-weight:700;font-size:.88rem;text-decoration:none}
.trio-cover{max-width:220px;margin:24px auto;border-radius:3px 9px 9px 3px;box-shadow:10px 12px 0 rgba(33,28,21,.14)}
.byline{display:flex;gap:12px;align-items:center;margin:24px 0;padding:16px;background:var(--crema);border:1px solid var(--riga);border-radius:8px}
.byline b{display:block;font-family:var(--display)}
.byline span{font-size:.86rem;color:var(--grigio)}
.related{display:flex;flex-wrap:wrap;gap:12px;margin:18px 0}
.related a{background:var(--crema);border:1px solid var(--riga);border-radius:6px;padding:10px 14px;text-decoration:none;font-size:.88rem;font-weight:600;color:var(--inchiostro)}
.optin-box{background:var(--inchiostro);color:var(--crema);border-radius:10px;padding:28px;margin:30px 0}
.optin-box h3{color:#fff;margin-top:0;font-family:var(--display)}
.optin-box p{color:var(--riga);margin-bottom:16px;font-size:.95rem}
.optin-form{display:flex;gap:10px;flex-wrap:wrap}
.optin-form input[type=email]{flex:1;min-width:200px;padding:13px 14px;border-radius:5px;border:2px solid var(--riga);font-size:1rem;font-family:var(--testo)}
.optin-form button{background:var(--accento);color:#fff;border:none;font-weight:800;font-size:.98rem;padding:13px 22px;border-radius:5px;cursor:pointer;box-shadow:4px 4px 0 rgba(0,0,0,.35)}
.optin-form button:hover{transform:translate(1px,1px);box-shadow:2px 2px 0 rgba(0,0,0,.35)}
.optin-form button:disabled{opacity:.6;cursor:default}
.optin-msg{font-size:.88rem;margin-top:10px;min-height:1.2em}
.optin-msg.ok{color:#8fd9a8}
.optin-msg.err{color:#f2a48b}
.optin-micro{font-size:.74rem;color:var(--muto);margin-top:8px}
footer{border-top:2px solid var(--inchiostro);margin-top:60px;padding:32px 0;font-size:.82rem;color:var(--muto)}
footer .wrap{display:flex;flex-direction:column;gap:8px}
footer a{color:var(--muto)}
.meta{font-size:.82rem;color:var(--muto);margin-bottom:8px}
/* Interactivity layer */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.is-visible{opacity:1;transform:none}
.reveal:nth-child(2){transition-delay:.08s}
.reveal:nth-child(3){transition-delay:.16s}
.reveal:nth-child(4){transition-delay:.24s}

#reading-progress{position:fixed;top:0;left:0;height:3px;width:0%;background:var(--accento);z-index:50;transition:width .1s linear}

.faq dt.faq-toggle{cursor:pointer;position:relative;padding-right:28px;user-select:none}
.faq dt.faq-toggle::after{content:'+';position:absolute;right:0;top:0;font-size:1.3rem;color:var(--accento);transition:transform .3s ease;font-family:var(--testo);font-weight:400}
.faq dt.faq-toggle.is-open::after{content:'\2212';transform:rotate(180deg)}
.faq dd{animation:faqOpen .25s ease}
@keyframes faqOpen{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

.hero-parallax{transition:transform .25s ease-out;transform-style:preserve-3d;will-change:transform}

.hero-video-wrap{position:relative;border-radius:10px;overflow:hidden;box-shadow:10px 12px 0 rgba(33,28,21,.14);margin:24px auto;max-width:520px}
.hero-video-wrap video{display:block;width:100%;height:auto}
.hero-video-wrap .cover-overlay{position:absolute;inset:0;display:flex;align-items:flex-end;justify-content:center;padding:18px;background:linear-gradient(180deg,rgba(0,0,0,0) 55%,rgba(33,28,21,.55) 100%)}
.hero-video-wrap .cover-overlay img{max-height:82%;border-radius:3px;box-shadow:0 8px 24px rgba(0,0,0,.4)}

.rating-bars{max-width:420px;margin:22px 0}
.rbar{display:flex;align-items:center;gap:10px;margin:6px 0;font-size:.85rem;color:var(--grigio)}
.rbar-label{width:44px;flex-shrink:0}
.rbar-track{flex:1;height:9px;background:var(--riga);border-radius:99px;overflow:hidden}
.rbar-fill{height:100%;width:0;background:var(--accento);border-radius:99px;transition:width 1.1s cubic-bezier(.2,.7,.3,1)}
.rbar-pct{width:34px;text-align:right;flex-shrink:0;font-weight:600;color:var(--inchiostro)}
.rank-badges{display:flex;gap:10px;flex-wrap:wrap;margin:16px 0}
.rank-badge{background:var(--crema);border:1px solid var(--riga);border-radius:99px;padding:6px 14px;font-size:.78rem;font-weight:700;color:var(--accento-scuro)}
.quote-block{border-left:3px solid var(--accento);background:var(--crema);padding:20px 22px;border-radius:0 8px 8px 0;margin:22px 0}
.quote-block p{font-style:italic;color:var(--inchiostro);margin-bottom:8px;font-size:1.02rem}
.quote-block cite{font-style:normal;font-size:.84rem;color:var(--muto)}
.review-card{border:1px solid var(--riga);border-radius:8px;padding:18px;margin-bottom:14px;background:#fff}
.review-card .stars{color:var(--accento);letter-spacing:2px;font-size:.9rem}
.review-card h4{font-family:var(--display);font-size:.98rem;margin:6px 0 4px}
.review-card p{font-size:.92rem;color:var(--grigio);margin-bottom:6px}
.review-card .meta2{font-size:.76rem;color:var(--muto)}
.specs-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:4px 24px;margin:18px 0;font-size:.9rem}
.specs-grid div{padding:8px 0;border-bottom:1px solid var(--riga);display:flex;justify-content:space-between;gap:12px}
.specs-grid b{color:var(--muto);font-weight:600}
.stat-row{display:flex;gap:28px;flex-wrap:wrap;margin:20px 0}
.stat{min-width:100px}
.stat .num{font-family:var(--display);font-weight:700;font-size:1.7rem;color:var(--accento-scuro);display:block;line-height:1.1}
.stat .lbl{font-size:.78rem;color:var(--muto);text-transform:uppercase;letter-spacing:.06em}

.btn{position:relative;overflow:hidden}
.btn::after{content:'';position:absolute;top:0;left:-60%;width:40%;height:100%;background:linear-gradient(120deg,transparent,rgba(255,255,255,.35),transparent);transform:skewX(-20deg)}
.btn:hover::after{animation:shine .9s ease}
@keyframes shine{from{left:-60%}to{left:120%}}

/* ============ Futuristic AI layer: circuits, code ticker, gears, light beams ============ */
:root{
  --tech-bg:#0b0f1a; --tech-bg2:#121826;
  --circuit-line:rgba(94,234,212,.32); --circuit-line-dim:rgba(94,234,212,.16);
  --circuit-glow:#5eead4; --circuit-text:rgba(226,232,240,.85); --circuit-text-dim:rgba(226,232,240,.5);
  --mono: 'SFMono-Regular',Consolas,'Liberation Mono',Menlo,monospace;
}

/* Scrolling code / prompt ticker, terminal style */
.code-ticker{background:var(--tech-bg);overflow:hidden;white-space:nowrap;position:relative;
  padding:13px 0;border-top:1px solid var(--circuit-line-dim);border-bottom:1px solid var(--circuit-line-dim)}
.code-ticker::before{content:'';position:absolute;inset:0;background:linear-gradient(100deg,transparent 0%,rgba(94,234,212,.14) 45%,transparent 90%);
  background-size:60% 100%;background-repeat:no-repeat;animation:beamSweep 7s linear infinite;pointer-events:none}
.code-ticker .track{display:inline-flex;animation:tickerScroll 46s linear infinite}
.code-ticker .seg{display:inline-flex;flex-shrink:0}
.code-ticker .tok{font-family:var(--mono);font-size:.82rem;color:var(--circuit-text);padding:0 26px;border-right:1px solid var(--circuit-line-dim)}
.code-ticker .tok em{color:var(--circuit-glow);font-style:normal}
@keyframes tickerScroll{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@keyframes beamSweep{from{background-position:-70% 0}to{background-position:170% 0}}

/* Circuit-line SVG frame (hero) and tech panel (stats dashboard) */
.circuit-frame{position:relative;max-width:560px;margin:24px auto}
.circuit-frame .circuit-svg{position:absolute;inset:-22px;width:calc(100% + 44px);height:calc(100% + 44px);pointer-events:none;z-index:0}
.circuit-frame .hero-video-wrap{position:relative;z-index:1;margin:0}
.circuit-svg path{fill:none;stroke:var(--circuit-line);stroke-width:2}
.circuit-svg .node{fill:var(--circuit-line)}
.circuit-svg .pulse{fill:var(--circuit-glow);filter:drop-shadow(0 0 6px var(--circuit-glow))}

.tech-panel{position:relative;background:var(--tech-bg);border-radius:14px;padding:30px 24px;overflow:hidden;
  box-shadow:0 0 0 1px var(--circuit-line-dim),6px 8px 0 rgba(0,0,0,.18)}
.tech-panel::before{content:'';position:absolute;inset:0;background:linear-gradient(100deg,transparent 0%,rgba(94,234,212,.10) 45%,transparent 90%);
  background-size:55% 100%;background-repeat:no-repeat;animation:beamSweep 8s linear infinite;pointer-events:none}
.tech-panel .circuit-svg{position:absolute;inset:0;width:100%;height:100%;opacity:.6}
.tech-panel > *:not(.circuit-svg){position:relative;z-index:1}
.tech-panel .stat .num{color:#fff}
.tech-panel .stat .lbl{color:var(--circuit-text-dim)}
.tech-panel .rank-badge{background:rgba(255,255,255,.04);border-color:var(--circuit-line);color:var(--circuit-glow)}
.tech-panel .rbar{color:var(--circuit-text-dim)}
.tech-panel .rbar-label,.tech-panel .rbar-pct{color:var(--circuit-text)}
.tech-panel .rbar-track{background:rgba(255,255,255,.1)}
.tech-panel .rbar-fill{background:var(--circuit-glow);box-shadow:0 0 8px var(--circuit-glow)}
.tech-panel .micro{color:var(--circuit-text-dim)}

/* Optin box gets a faint circuit backdrop, it's already dark */
.optin-box{position:relative;overflow:hidden}
.optin-box .circuit-svg{position:absolute;inset:0;width:100%;height:100%;opacity:.35;pointer-events:none}
.optin-box > *{position:relative;z-index:1}

/* Rotating gear / chip accents, decorative watermarks */
.gear-spin{position:absolute;opacity:.14;pointer-events:none;z-index:0;color:var(--muto)}
.gear-spin svg{width:100%;height:100%;display:block}
.gear-spin.spin-cw{animation:spinCW 34s linear infinite}
.gear-spin.spin-ccw{animation:spinCCW 26s linear infinite}
@keyframes spinCW{from{transform:rotate(0)}to{transform:rotate(360deg)}}
@keyframes spinCCW{from{transform:rotate(0)}to{transform:rotate(-360deg)}}
.hero-section{position:relative;overflow:hidden}
section{position:relative}

@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .btn::after{display:none}
  .hero-parallax{transition:none}
  .hero-video-wrap video{display:none}
  .hero-video-wrap .cover-overlay{position:static;background:none;padding:0}
  .hero-video-wrap .cover-overlay img{max-height:none;width:100%}
  .code-ticker .track{animation:none}
  .code-ticker::before,.tech-panel::before{animation:none;display:none}
  .circuit-svg .pulse{display:none}
  .gear-spin{animation:none}
}

@media (max-width:600px){
  .mast nav{display:none}
  section{padding:28px 0}
  .gear-spin{display:none}
}