@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;500;600&family=Plus+Jakarta+Sans:wght@300;400;500;600&display=swap');

:root{
  --bg-page:#f0f7fc;--bg-surface:#e4eef5;--bg-card:#ffffff;--bg-subtle:#eaf3f8;
  --text-primary:#0d2840;--text-secondary:#4a6885;--text-muted:#7a96b0;
  --accent:#1d6fa5;--accent-soft:#d0e6f5;--accent-hover:#155785;--accent-mid:#2d8cc8;
  --gold:#5b8caf;--gold-soft:#dce8f0;
  --border:rgba(13,40,64,.10);--border-mid:rgba(13,40,64,.18);--border-strong:rgba(13,40,64,.28);
  --danger-soft:#faeaea;--danger-text:#8b2020;--warn-soft:#fdf3e3;--warn-text:#7a4a10;
  --ff-display:'Playfair Display',Georgia,serif;--ff-body:'Plus Jakarta Sans',system-ui,sans-serif;
  --r-sm:8px;--r-md:12px;--r-lg:18px;--r-xl:24px;--ease:.22s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg-page);color:var(--text-primary);font-family:var(--ff-body);line-height:1.65;overflow-x:hidden;-webkit-font-smoothing:antialiased}
::-webkit-scrollbar{width:5px}
::-webkit-scrollbar-track{background:var(--bg-page)}
::-webkit-scrollbar-thumb{background:var(--accent-soft);border-radius:4px}

/* NAV */
.topnav{position:fixed;top:0;width:100%;z-index:200;padding:0 64px;height:64px;display:flex;align-items:center;justify-content:space-between;background:rgba(250,248,244,.93);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.back-btn{display:flex;align-items:center;gap:6px;font-size:12px;font-weight:500;color:var(--text-muted);text-decoration:none;letter-spacing:.3px;transition:color var(--ease);position:relative;z-index:10;cursor:pointer}
.back-btn:hover{color:var(--accent)}
.back-btn::before{content:'←';font-size:15px}
.nav-logo{font-family:var(--ff-display);font-size:20px;font-weight:600;color:var(--text-primary);text-decoration:none}
.nav-logo span{color:var(--accent)}

/* HERO */
.dev-hero{padding:120px 64px 72px;position:relative;overflow:hidden;background:var(--bg-page)}
.dev-hero::before{content:'';position:absolute;top:-120px;right:-160px;width:600px;height:600px;background:radial-gradient(circle,rgba(29,111,165,.08) 0%,transparent 70%);pointer-events:none}
.dev-hero::after{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(42,31,26,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(42,31,26,.025) 1px,transparent 1px);background-size:52px 52px;pointer-events:none}
.hero-label{font-size:10px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:var(--accent);margin-bottom:10px;display:flex;align-items:center;gap:10px;position:relative;z-index:1}
.hero-label::before{content:'';width:28px;height:1.5px;background:var(--accent)}
.hero-tag{display:inline-block;padding:5px 14px;background:var(--accent-soft);color:var(--accent);font-size:11px;font-weight:600;letter-spacing:.8px;text-transform:uppercase;border-radius:99px;margin-bottom:18px;position:relative;z-index:1}
.dev-title{font-family:var(--ff-display);font-size:clamp(52px,8vw,110px);line-height:.95;font-weight:600;letter-spacing:-.5px;margin-bottom:18px;position:relative;z-index:1}
.dev-title .accent{color:var(--accent)}
.dev-subtitle{font-family:var(--ff-display);font-size:19px;font-weight:400;font-style:italic;color:var(--text-secondary);max-width:620px;line-height:1.6;margin-bottom:40px;position:relative;z-index:1}
.hero-badges{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:1}
.hero-badge{padding:14px 20px;background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--r-lg)}
.hb-num{font-family:var(--ff-display);font-size:26px;font-weight:600;color:var(--accent);display:block;line-height:1}
.hb-label{font-size:10px;font-weight:600;color:var(--text-muted);letter-spacing:1px;text-transform:uppercase;margin-top:3px}

/* SECTIONS */
.section{padding:80px 64px;border-top:1px solid var(--border)}
.section.alt{background:var(--bg-surface)}
.sec-label{font-size:10px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:var(--accent);margin-bottom:10px;display:flex;align-items:center;gap:8px}
.sec-label::before{content:'°';font-size:15px}
.sec-title{font-family:var(--ff-display);font-size:clamp(26px,3.5vw,48px);font-weight:600;line-height:1.1;letter-spacing:-.3px;margin-bottom:14px}
.sec-desc{font-size:16px;font-weight:300;color:var(--text-secondary);max-width:660px;line-height:1.75;margin-bottom:44px}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 26px;font-family:var(--ff-body);font-size:13px;font-weight:500;border-radius:var(--r-md);text-decoration:none;cursor:pointer;border:none;transition:all var(--ease)}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:0 8px 24px rgba(29,111,165,.2)}
.btn-outline{background:transparent;color:var(--text-primary);border:1.5px solid var(--border-mid)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}

/* FEATURES */
.feat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px}
.feat-card{padding:26px;border:1.5px solid var(--border);border-radius:var(--r-xl);background:var(--bg-card);transition:all var(--ease)}
.feat-card:hover{border-color:rgba(29,111,165,.3);transform:translateY(-4px);box-shadow:0 10px 36px rgba(13,40,64,.08)}
.feat-icon{font-size:28px;margin-bottom:14px;display:block}
.feat-num{font-family:var(--ff-display);font-size:32px;font-weight:600;color:var(--accent-soft);line-height:1;margin-bottom:4px}
.feat-title{font-family:var(--ff-display);font-size:17px;font-weight:500;color:var(--accent);margin-bottom:8px}
.feat-desc{font-size:13px;color:var(--text-secondary);line-height:1.6}

/* BENEFITS */
.benefits-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px}
.benefit-item{padding:14px 18px;border:1.5px solid var(--border);border-radius:var(--r-md);background:var(--bg-card);display:flex;align-items:flex-start;gap:10px;transition:border-color var(--ease)}
.benefit-item:hover{border-color:rgba(29,111,165,.3)}
.benefit-item::before{content:'';width:18px;height:18px;background:var(--accent-soft);border-radius:50%;flex-shrink:0;margin-top:1px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 18'%3E%3Cpath d='M4 9l3.5 3.5 6.5-7' stroke='%231d6fa5' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}
.benefit-item p{font-size:13px;color:var(--text-secondary);line-height:1.5}
.benefit-item b{color:var(--text-primary);font-weight:500}

/* CONTRA */
.contra-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.contra-box{padding:26px;border-radius:var(--r-xl)}
.contra-box.danger{border:1.5px solid rgba(180,60,60,.2);background:var(--danger-soft)}
.contra-box.warn{border:1.5px solid rgba(91,140,175,.25);background:var(--warn-soft)}
.contra-title{font-family:var(--ff-display);font-size:18px;font-weight:500;margin-bottom:14px}
.contra-box.danger .contra-title{color:var(--danger-text)}
.contra-box.warn .contra-title{color:var(--warn-text)}
.contra-list{list-style:none;display:flex;flex-direction:column;gap:6px}
.contra-list li{font-size:13px;color:var(--text-secondary);padding:8px 12px;border-radius:var(--r-sm);display:flex;align-items:flex-start;gap:8px;line-height:1.5}
.contra-box.danger .contra-list li{background:rgba(180,60,60,.06)}
.contra-box.warn .contra-list li{background:rgba(91,140,175,.08)}
.contra-list li::before{font-size:13px;flex-shrink:0;margin-top:1px}
.contra-box.danger .contra-list li::before{content:'⚠'}
.contra-box.warn .contra-list li::before{content:'ℹ️';color:var(--warn-text)}

/* STEPS */
.steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:0;position:relative;margin-top:52px}
.steps::before{content:'';position:absolute;top:36px;left:5%;right:5%;height:1.5px;background:linear-gradient(90deg,transparent,rgba(29,111,165,.2),transparent)}
.step-item{text-align:center;padding:0 18px;position:relative}
.step-circle{width:72px;height:72px;border-radius:50%;border:2px solid rgba(29,111,165,.2);background:var(--bg-card);display:flex;align-items:center;justify-content:center;margin:0 auto 20px;font-family:var(--ff-display);font-size:22px;font-weight:600;color:var(--accent);position:relative;z-index:1;transition:all var(--ease)}
.step-item:hover .step-circle{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 8px 24px rgba(29,111,165,.22)}
.step-item h4{font-family:var(--ff-display);font-size:16px;font-weight:500;margin-bottom:8px}
.step-item p{font-size:13px;color:var(--text-secondary);line-height:1.6}

/* HOWTO */
.howto-steps{display:flex;flex-direction:column;gap:12px;max-width:680px}
.howto-step{display:flex;gap:18px;padding:18px 22px;border:1.5px solid var(--border);border-radius:var(--r-lg);background:var(--bg-card);transition:border-color var(--ease)}
.howto-step:hover{border-color:rgba(29,111,165,.25)}
.hs-num{font-family:var(--ff-display);font-size:28px;font-weight:600;color:var(--accent-soft);flex-shrink:0;line-height:1;min-width:36px}
.hs-content h4{font-family:var(--ff-display);font-size:15px;font-weight:500;color:var(--accent);margin-bottom:5px}
.hs-content p{font-size:13px;color:var(--text-secondary);line-height:1.6}

/* SPEC TABLE */
.spec-table{width:100%;border-collapse:collapse}
.spec-table tr:nth-child(even) td{background:rgba(29,111,165,.04)}
.spec-table td{padding:11px 15px;font-size:13px;border-bottom:1px solid var(--border)}
.spec-table td:first-child{color:var(--text-muted);width:48%}
.spec-table td:last-child{color:var(--text-primary);font-weight:500}

/* TWO COL */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start}

/* APPLICATOR */
.applicator-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.app-card{padding:16px;border:1.5px solid var(--border);border-radius:var(--r-lg);background:var(--bg-card);text-align:center;transition:border-color var(--ease)}
.app-card:hover{border-color:rgba(29,111,165,.3)}
.app-icon{font-size:26px;margin-bottom:8px}
.app-name{font-family:var(--ff-display);font-size:13px;font-weight:500;color:var(--accent)}
.app-desc{font-size:11px;color:var(--text-muted);margin-top:3px}

/* TREATMENT TABLE */
.treatment-table-wrap{overflow-x:auto;border-radius:var(--r-lg);border:1.5px solid var(--border)}
.treatment-table{width:100%;border-collapse:collapse;font-size:12px}
.treatment-table th{background:var(--accent-soft);padding:10px 14px;text-align:left;font-size:10px;letter-spacing:1.5px;text-transform:uppercase;color:var(--accent);font-weight:600}
.treatment-table td{padding:10px 14px;border-bottom:1px solid var(--border);color:var(--text-secondary)}
.treatment-table tr:last-child td{border:none}
.treatment-table tr:hover td{background:rgba(29,111,165,.04)}

/* CTA */
.cta-bar{background:linear-gradient(135deg,#dcecf5 0%,#cce0ee 100%);padding:64px;text-align:center;border-top:1px solid var(--border)}
.cta-bar h3{font-family:var(--ff-display);font-size:36px;font-weight:600;letter-spacing:-.3px;margin-bottom:10px}
.cta-bar p{font-family:var(--ff-display);font-size:17px;font-weight:400;font-style:italic;color:var(--text-secondary);margin-bottom:28px}

/* FOOTER */
footer{background:var(--text-primary);color:rgba(255,255,255,.6);padding:36px 64px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px}
footer p{font-size:12px}

/* REVEAL */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .65s ease,transform .65s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* WAVE BAR */
.wave-bar{display:flex;align-items:center;gap:14px;padding:14px 18px;border:1.5px solid var(--border);border-radius:var(--r-md);background:var(--bg-card);margin-bottom:10px}
.wave-dot{width:14px;height:14px;border-radius:50%;flex-shrink:0}
.wave-red{background:#e05252}
.wave-nir{background:#8b0000}
.wave-info h4{font-size:14px;font-weight:500;margin-bottom:3px}
.wave-info p{font-size:12px;color:var(--text-secondary);line-height:1.5}

/* RESPONSIVE */
@media(max-width:1000px){
  .topnav{padding:0 24px}
  .dev-hero{padding:100px 24px 56px}
  .section{padding:60px 24px}
  .two-col{grid-template-columns:1fr}
  .contra-grid{grid-template-columns:1fr}
  .steps::before{display:none}
  footer{padding:28px 24px;flex-direction:column;text-align:center}
  .cta-bar{padding:48px 24px}
}
@media(max-width:600px){
  .dev-title{font-size:48px}
  .hero-badges{gap:10px}
}