:root{
  --primary:#1a7a6e;
  --secondary:#e8a13d;
  --accent:#ff6b4a;
  --background:#0a1614;
  --surface:rgba(20,38,35,0.55);
  --surface-solid:#122824;
  --text:#f3efe6;
  --muted:#9fb3ac;
  --glass-border:rgba(232,161,61,0.18);
  --shadow:0 20px 50px rgba(0,0,0,0.45);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--background);
  color:var(--text);
  font-family:'Segoe UI',system-ui,-apple-system,'Helvetica Neue',Arial,sans-serif;
  line-height:1.65;
  overflow-x:hidden;
  min-height:100vh;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font:inherit;cursor:pointer;background:none;border:none;color:inherit}
h1,h2,h3{font-weight:700;line-height:1.2;letter-spacing:-0.01em}
h2{font-size:clamp(1.5rem,3vw,2.1rem);margin-bottom:1rem;background:linear-gradient(90deg,var(--text),var(--secondary));-webkit-background-clip:text;background-clip:text;color:transparent}
h3{font-size:1.15rem;margin-bottom:.5rem;color:var(--secondary)}
p{color:var(--text);margin-bottom:.9rem}
.text-gradient{background:linear-gradient(90deg,var(--secondary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}

/* Reading progress */
.reading-progress{position:fixed;top:0;left:0;height:3px;width:0%;background:linear-gradient(90deg,var(--secondary),var(--accent));z-index:1000;transition:width .1s linear}

/* Header */
.site-header{position:sticky;top:0;z-index:900;padding:.9rem 1.5rem;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);background:rgba(10,22,20,0.55);border-bottom:1px solid var(--glass-border);transition:background .3s ease}
.header-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:700}
.brand-mark{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--primary),var(--accent));box-shadow:0 0 18px rgba(232,161,61,0.4);font-size:.9rem}
.brand-mark.small{width:34px;height:34px}
.brand-name{font-size:1.05rem}
.main-nav{display:flex;align-items:center;gap:1.6rem}
.main-nav a{font-size:.92rem;color:var(--muted);transition:color .25s ease}
.main-nav a:hover,.main-nav a:focus-visible{color:var(--secondary)}
.nav-cta{padding:.5rem 1.1rem;border-radius:999px;background:linear-gradient(90deg,var(--primary),var(--accent));color:#fff!important;box-shadow:0 0 16px rgba(255,107,74,0.35)}
.hamburger{display:none;flex-direction:column;gap:5px;padding:6px;z-index:950}
.hamburger span{width:22px;height:2px;background:var(--text);transition:transform .3s ease,opacity .3s ease}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* Hero */
.hero{position:relative;min-height:92vh;display:flex;flex-direction:column;justify-content:center;overflow:hidden;padding:2rem 1.5rem}
.hero-bg{position:absolute;inset:0;z-index:0;perspective:1000px}
.grid-plane{position:absolute;inset:-20% -20% -40%;background-image:linear-gradient(rgba(232,161,61,0.08) 1px,transparent 1px),linear-gradient(90deg,rgba(232,161,61,0.08) 1px,transparent 1px);background-size:48px 48px;transform:rotateX(60deg);animation:gridMove 18s linear infinite}
@keyframes gridMove{from{background-position:0 0}to{background-position:0 480px}}
.orb{position:absolute;border-radius:50%;filter:blur(50px);opacity:.55}
.orb-1{width:340px;height:340px;background:radial-gradient(circle,var(--primary),transparent 70%);top:-6%;left:-8%;animation:float1 12s ease-in-out infinite}
.orb-2{width:280px;height:280px;background:radial-gradient(circle,var(--accent),transparent 70%);bottom:-10%;right:-6%;animation:float2 14s ease-in-out infinite}
.orb-3{width:220px;height:220px;background:radial-gradient(circle,var(--secondary),transparent 70%);top:40%;right:20%;animation:float1 16s ease-in-out infinite reverse}
@keyframes float1{0%,100%{transform:translate(0,0)}50%{transform:translate(30px,-25px)}}
@keyframes float2{0%,100%{transform:translate(0,0)}50%{transform:translate(-25px,20px)}}
.light-ray{position:absolute;width:2px;height:140%;top:-20%;background:linear-gradient(180deg,transparent,rgba(232,161,61,0.25),transparent);opacity:.5}
.ray-1{left:22%;transform:rotate(12deg);animation:rayShift 9s ease-in-out infinite}
.ray-2{right:28%;transform:rotate(-10deg);animation:rayShift 11s ease-in-out infinite reverse}
@keyframes rayShift{0%,100%{opacity:.2}50%{opacity:.6}}
.particles{position:absolute;inset:0}
.particle{position:absolute;width:3px;height:3px;border-radius:50%;background:var(--secondary);opacity:.5;animation:drift linear infinite}
@keyframes drift{from{transform:translateY(0)}to{transform:translateY(-120vh)}}

.hero-content{position:relative;z-index:2;max-width:1200px;margin:0 auto;width:100%;display:grid;grid-template-columns:1.1fr .9fr;gap:2.5rem;align-items:center}
.eyebrow{display:inline-block;padding:.35rem .9rem;border-radius:999px;border:1px solid var(--glass-border);background:var(--surface);font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;color:var(--secondary);margin-bottom:1rem;backdrop-filter:blur(8px)}
.hero-text h1{font-size:clamp(2rem,4.5vw,3.1rem);margin-bottom:1rem}
.hero-sub{color:var(--muted);font-size:1.05rem;max-width:52ch;margin-bottom:1.6rem}
.hero-actions{display:flex;gap:1rem;flex-wrap:wrap}
.btn{padding:.85rem 1.6rem;border-radius:12px;font-weight:600;font-size:.95rem;transition:transform .25s ease,box-shadow .25s ease;display:inline-block}
.btn-primary{background:linear-gradient(90deg,var(--primary),var(--accent));color:#fff;box-shadow:0 10px 30px rgba(255,107,74,0.3)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 16px 36px rgba(255,107,74,0.45)}
.btn-ghost{border:1px solid var(--glass-border);background:var(--surface);backdrop-filter:blur(8px)}
.btn-ghost:hover{transform:translateY(-3px);border-color:var(--secondary)}

.hero-visual{position:relative;height:340px;display:flex;align-items:center;justify-content:center;transform-style:preserve-3d}
.ring{position:absolute;border-radius:50%;border:1px solid var(--glass-border);animation:spin linear infinite}
.ring-1{width:260px;height:260px;border-color:rgba(232,161,61,0.35);animation-duration:22s}
.ring-2{width:200px;height:200px;border-color:rgba(255,107,74,0.3);animation-duration:16s;animation-direction:reverse}
.ring-3{width:320px;height:320px;border-color:rgba(26,122,110,0.4);animation-duration:30s}
@keyframes spin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}
.shape{position:absolute;opacity:.6;animation:floatShape 7s ease-in-out infinite}
.shape-tri{width:0;height:0;border-left:14px solid transparent;border-right:14px solid transparent;border-bottom:22px solid var(--secondary);top:10%;left:8%;animation-delay:0s}
.shape-sq{width:20px;height:20px;background:var(--accent);top:70%;right:10%;border-radius:4px;animation-delay:1.5s}
.shape-hex{width:22px;height:22px;background:var(--primary);top:20%;right:6%;clip-path:polygon(50% 0%,100% 25%,100% 75%,50% 100%,0% 75%,0% 25%);animation-delay:3s}
@keyframes floatShape{0%,100%{transform:translateY(0) rotate(0)}50%{transform:translateY(-14px) rotate(20deg)}}
.logo-core{position:relative;width:120px;height:120px;border-radius:28px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,rgba(26,122,110,0.5),rgba(255,107,74,0.4));backdrop-filter:blur(10px);border:1px solid var(--glass-border);box-shadow:0 0 60px rgba(232,161,61,0.35),inset 0 0 30px rgba(255,255,255,0.05);animation:corePulse 5s ease-in-out infinite}
@keyframes corePulse{0%,100%{box-shadow:0 0 60px rgba(232,161,61,0.35),inset 0 0 30px rgba(255,255,255,0.05)}50%{box-shadow:0 0 90px rgba(232,161,61,0.55),inset 0 0 40px rgba(255,255,255,0.08)}}
.logo-text{font-size:2.4rem;font-weight:800;background:linear-gradient(135deg,var(--secondary),#fff);-webkit-background-clip:text;background-clip:text;color:transparent}
.logo-glow{position:absolute;inset:-30%;border-radius:50%;background:radial-gradient(circle,rgba(232,161,61,0.25),transparent 70%);z-index:-1}

.scroll-indicator{position:absolute;bottom:1.6rem;left:50%;transform:translateX(-50%);width:26px;height:42px;border:2px solid var(--glass-border);border-radius:20px;display:flex;justify-content:center;padding-top:8px;z-index:2}
.scroll-dot{width:4px;height:8px;border-radius:2px;background:var(--secondary);animation:scrollDot 1.6s ease-in-out infinite}
@keyframes scrollDot{0%{opacity:1;transform:translateY(0)}70%{opacity:0}100%{opacity:0;transform:translateY(12px)}}

/* Content layout */
.content-wrap{max-width:1200px;margin:0 auto;padding:3rem 1.5rem 1rem;display:grid;grid-template-columns:240px 1fr;gap:2.5rem;align-items:start}
.toc{position:sticky;top:5.5rem}
.toc-card{background:var(--surface);border:1px solid var(--glass-border);border-radius:16px;padding:1.1rem;backdrop-filter:blur(10px)}
.toc-toggle{display:none;width:100%;justify-content:space-between;align-items:center;font-weight:600;color:var(--secondary)}
.toc-chevron{transition:transform .3s ease}
.toc-list li{margin-bottom:.15rem}
.toc-list a{display:block;padding:.45rem .6rem;border-radius:8px;font-size:.88rem;color:var(--muted);border-left:2px solid transparent;transition:all .25s ease}
.toc-list a:hover{color:var(--text);background:rgba(255,255,255,0.03)}
.toc-list a.active{color:var(--secondary);border-left-color:var(--secondary);background:rgba(232,161,61,0.08)}

.article{max-width:72ch}
.lede{font-size:1.12rem;color:var(--muted);margin-bottom:2rem}
.article section{margin-bottom:2.4rem;opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.article section.revealed{opacity:1;transform:translateY(0)}
.anchor-link{color:var(--secondary);border-bottom:1px solid rgba(232,161,61,0.4);transition:color .2s ease,border-color .2s ease}
.anchor-link:hover{color:var(--accent);border-color:var(--accent)}
.styled-list li{position:relative;padding-left:1.4rem;margin-bottom:.7rem;color:var(--text)}
.styled-list li::before{content:'';position:absolute;left:0;top:.55rem;width:7px;height:7px;border-radius:50%;background:linear-gradient(135deg,var(--secondary),var(--accent))}

.tip-card{display:flex;gap:1rem;background:var(--surface);border:1px solid var(--glass-border);border-radius:16px;padding:1.2rem;margin:1.4rem 0;backdrop-filter:blur(10px);position:relative;overflow:hidden}
.tip-card::before{content:'';position:absolute;inset:0;border-radius:16px;padding:1px;background:linear-gradient(120deg,var(--secondary),transparent 40%,var(--accent));-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:.4}
.tip-icon{font-size:1.3rem;color:var(--secondary);flex-shrink:0}

.step-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1.1rem;margin-top:1.4rem}
.step-card{background:var(--surface);border:1px solid var(--glass-border);border-radius:16px;padding:1.3rem;backdrop-filter:blur(10px);transition:transform .3s ease,box-shadow .3s ease;transform-style:preserve-3d}
.step-card:hover{transform:translateY(-6px) rotateX(4deg);box-shadow:0 18px 40px rgba(0,0,0,0.4),0 0 24px rgba(232,161,61,0.15)}
.step-num{display:inline-flex;width:32px;height:32px;border-radius:9px;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--primary),var(--accent));font-weight:700;margin-bottom:.7rem}

.highlight-box{border-left:3px solid var(--secondary);background:linear-gradient(90deg,rgba(232,161,61,0.08),transparent);border-radius:0 12px 12px 0;padding:1.1rem 1.3rem;margin:1.4rem 0}
.highlight-box p{margin:0;color:var(--text)}

/* CTA */
.cta-section{padding:4rem 1.5rem;max-width:1200px;margin:0 auto}
.cta-card{position:relative;border-radius:24px;padding:3rem 2rem;background:linear-gradient(160deg,rgba(26,122,110,0.25),rgba(255,107,74,0.12));border:1px solid var(--glass-border);backdrop-filter:blur(14px);overflow:hidden;text-align:center;box-shadow:var(--shadow)}
.cta-glow{position:absolute;top:-30%;left:50%;transform:translateX(-50%);width:500px;height:300px;background:radial-gradient(circle,rgba(232,161,61,0.3),transparent 70%);filter:blur(30px)}
.cta-card h2{position:relative}
.cta-sub{position:relative;color:var(--muted);max-width:50ch;margin:0 auto 2rem}
.cta-grid{position:relative;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;text-align:left}
.cta-item{display:flex;align-items:center;gap:.9rem;background:var(--surface);border:1px solid var(--glass-border);border-radius:14px;padding:1rem 1.1rem;transition:transform .25s ease,border-color .25s ease}
.cta-item:hover{transform:translateY(-4px);border-color:var(--secondary)}
.cta-icon{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;flex-shrink:0}
.cta-item strong{display:block;font-size:.85rem;color:var(--secondary)}
.cta-item span span{color:var(--muted);font-size:.88rem}

/* Footer */
.site-footer{border-top:1px solid var(--glass-border);padding:2.5rem 1.5rem 1.2rem;background:var(--surface-solid)}
.footer-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);gap:1.8rem}
.footer-brand{display:flex;align-items:center;gap:.7rem}
.footer-name{font-weight:700}
.footer-loc{color:var(--muted);font-size:.85rem}
.footer-nav{display:flex;flex-direction:column;gap:.5rem}
.footer-nav a,.footer-contact a{color:var(--muted);font-size:.88rem;transition:color .2s ease}
.footer-nav a:hover,.footer-contact a:hover{color:var(--secondary)}
.footer-contact{display:flex;flex-direction:column;gap:.5rem}
.footer-social p{color:var(--muted);font-size:.82rem;margin-bottom:.6rem}
.social-icon{display:inline-flex;width:38px;height:38px;border-radius:10px;align-items:center;justify-content:center;background:var(--surface);border:1px solid var(--glass-border);transition:transform .3s ease,box-shadow .3s ease,color .3s ease}
.social-icon:hover{transform:translateY(-4px) scale(1.06);box-shadow:0 0 18px rgba(232,161,61,0.4);color:var(--secondary)}
.footer-bottom{max-width:1200px;margin:1.8rem auto 0;padding-top:1.2rem;border-top:1px solid var(--glass-border);text-align:center;color:var(--muted);font-size:.82rem}

.back-to-top{position:fixed;bottom:1.6rem;right:1.6rem;width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;box-shadow:0 10px 26px rgba(0,0,0,0.4);opacity:0;pointer-events:none;transform:translateY(10px);transition:opacity .3s ease,transform .3s ease;z-index:800}
.back-to-top.visible{opacity:1;pointer-events:auto;transform:translateY(0)}

@media (max-width:900px){
  .hero-content{grid-template-columns:1fr}
  .hero-visual{height:260px;order:-1}
  .content-wrap{grid-template-columns:1fr}
  .toc{position:relative;top:0}
  .toc-toggle{display:flex}
  .toc-list{max-height:0;overflow:hidden;transition:max-height .35s ease}
  .toc-list.open{max-height:600px;margin-top:.6rem}
  .toc-toggle.open .toc-chevron{transform:rotate(180deg)}
  .step-cards{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr 1fr;gap:1.6rem}
}
@media (max-width:640px){
  .main-nav{position:fixed;inset:0 0 0 30%;top:64px;background:rgba(10,22,20,0.97);backdrop-filter:blur(16px);flex-direction:column;align-items:flex-start;padding:2rem 1.5rem;gap:1.4rem;transform:translateX(100%);transition:transform .35s ease;border-left:1px solid var(--glass-border)}
  .main-nav.open{transform:translateX(0)}
  .hamburger{display:flex}
  .hero{min-height:auto;padding-top:2.4rem;padding-bottom:3rem}
  .cta-card{padding:2rem 1.3rem}
  .footer-inner{grid-template-columns:1fr}
}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:0.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:0.01ms !important;
    scroll-behavior:auto !important;
  }
}

a:focus-visible,button:focus-visible{outline:2px solid var(--secondary);outline-offset:3px;border-radius:6px}