/* ═══════════════════════════════════════
   Autodesk Landing — SolverPro
   Dark theme inspired by autodesk.com
═══════════════════════════════════════ */

/* === RESET & VARIABLES === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --accent:#0696D7;--accent-hover:#1AABE8;--accent-dark:#0578AE;
  --bg-dark:#0D0D0D;--bg-card:#1A1A1A;--bg-card2:#222;--bg-card3:#2A2A2A;
  --text:#FFFFFF;--text2:#B0B0B0;--text3:#707070;
  --border:#333;--border-light:#444;
  --radius:10px;--radius-lg:16px;
  --shadow:0 2px 12px rgba(0,0,0,0.3);
  --shadow-lg:0 8px 40px rgba(0,0,0,0.4);
  --max-w:1200px;
  --green-wa:#25D366;
  --font:'Segoe UI',-apple-system,BlinkMacSystemFont,'Helvetica Neue',Arial,sans-serif;
}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--text);background:var(--bg-dark);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}

/* === LAYOUT === */
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--dark{background:#111}
.section-title{font-size:36px;font-weight:700;text-align:center;color:var(--text);margin-bottom:12px;letter-spacing:-0.5px}
.section-sub{font-size:17px;color:var(--text2);text-align:center;max-width:620px;margin:0 auto 56px;line-height:1.6}

/* === BUTTONS === */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 28px;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer;transition:all 0.25s;border:2px solid transparent;font-family:var(--font)}
.btn-accent{background:var(--accent);color:#000;border-color:var(--accent)}
.btn-accent:hover{background:var(--accent-hover);border-color:var(--accent-hover)}
.btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,0.35)}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,0.06)}
.btn-outline-accent{background:transparent;color:var(--accent);border-color:var(--accent)}
.btn-outline-accent:hover{background:var(--accent);color:#000}
.btn-full{width:100%;text-align:center}

/* === NAV === */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(13,13,13,0.8);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border-bottom:1px solid transparent;transition:all 0.3s}
.nav.scrolled{background:rgba(13,13,13,0.95);border-bottom-color:var(--border)}
.nav-inner{max-width:var(--max-w);margin:0 auto;padding:0 24px;height:56px;display:flex;align-items:center;gap:16px}
.nav-logo img{height:26px;width:auto;display:block}
.nav-sep{width:1px;height:20px;background:var(--border)}
.nav-brand{display:flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--text);letter-spacing:1px;white-space:nowrap}
.nav-adsk-logo{height:14px;width:auto}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-links a{padding:8px 16px;font-size:14px;color:var(--text2);border-radius:6px;transition:all 0.2s;font-weight:500}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,0.06)}
.nav-cta{margin-left:8px;padding:8px 20px;font-size:13px;font-weight:600;background:var(--accent);color:#000;border-radius:6px;transition:background 0.2s;white-space:nowrap}
.nav-cta:hover{background:var(--accent-hover)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:22px;height:2px;background:#fff;border-radius:2px;transition:all 0.3s}
.nav-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* === HERO === */
.hero{position:relative;min-height:600px;display:flex;align-items:center;padding:120px 0 80px;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0;background:linear-gradient(160deg,#000 0%,#0a0a0a 30%,#0e1a24 60%,#000 100%)}
.hero-bg::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 900px 500px at 70% 50%,rgba(6,150,215,0.10),transparent 70%)}
.hero-bg::after{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 500px 400px at 20% 80%,rgba(6,150,215,0.05),transparent 70%)}
.hero-inner{position:relative;z-index:1;max-width:var(--max-w);margin:0 auto;padding:0 24px}
.hero-eyebrow{font-size:13px;font-weight:600;color:var(--accent);text-transform:uppercase;letter-spacing:2px;margin-bottom:20px}
.hero h1{font-size:56px;font-weight:700;color:#fff;line-height:1.08;margin-bottom:22px;max-width:680px;letter-spacing:-1.5px}
.hero-sub{font-size:18px;color:var(--text2);max-width:540px;line-height:1.6;margin-bottom:36px}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap}

/* === PRODUCTS === */
.products-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-bottom:32px}
.product-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px 28px;position:relative;display:flex;flex-direction:column;transition:border-color 0.3s,box-shadow 0.3s,transform 0.3s}
.product-card:hover{border-color:var(--border-light);box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.product-card--featured{border-color:var(--accent);background:linear-gradient(180deg,rgba(0,191,179,0.06) 0%,var(--bg-card) 40%)}
.product-tag{position:absolute;top:-12px;left:20px;background:var(--accent);color:#000;padding:4px 14px;border-radius:20px;font-size:11px;font-weight:700;letter-spacing:0.5px;text-transform:uppercase}
.product-tag--popular{background:#0696D7;color:#fff}
.product-tag--cloud{background:#0696D7;color:#fff}
.product-header{display:flex;align-items:center;gap:16px;margin-bottom:16px}
.product-icon{width:52px;height:52px;border-radius:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.product-icon svg{width:28px;height:28px}
.product-icon--img{background:transparent;border-radius:0}
.product-icon--img img{width:52px;height:52px;object-fit:contain;display:block}
.product-header h3{font-size:22px;font-weight:700;color:#fff}
.product-subtitle{font-size:13px;color:var(--text3);margin-top:2px}
.product-desc{font-size:14px;color:var(--text2);line-height:1.6;margin-bottom:20px}
.product-price{display:flex;align-items:baseline;gap:6px;margin-bottom:20px}
.product-price-old{font-size:16px;color:var(--text3);text-decoration:line-through;margin-bottom:4px}
.product-price-amount{font-size:42px;font-weight:700;color:var(--accent);letter-spacing:-1px}
.product-price-unit{font-size:14px;color:var(--text3)}
.product-savings{display:inline-block;background:rgba(6,150,215,0.12);color:var(--accent);padding:3px 10px;border-radius:4px;font-size:12px;font-weight:600;margin-top:6px}
.product-includes{margin-bottom:24px;display:flex;flex-direction:column;gap:8px;flex:1}
.product-includes li{font-size:13px;color:var(--text2);padding-left:20px;position:relative;line-height:1.5}
.product-includes li::before{content:'✓';position:absolute;left:0;color:var(--accent);font-weight:700;font-size:12px}
.products-note{font-size:12px;color:var(--text3);text-align:center;margin-top:8px}

/* === BENEFITS === */
.benefits-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.benefit-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:28px 24px;transition:border-color 0.3s,transform 0.3s}
.benefit-card:hover{border-color:var(--accent);transform:translateY(-4px)}
.benefit-icon{width:40px;height:40px;margin-bottom:16px}
.benefit-icon svg{width:40px;height:40px}
.benefit-card h3{font-size:16px;font-weight:600;margin-bottom:8px;color:#fff}
.benefit-card p{font-size:13px;color:var(--text2);line-height:1.6}

/* === VALUE-ADD === */
.value-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.value-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:28px 24px;text-align:center;transition:border-color 0.3s,transform 0.3s}
.value-card:hover{border-color:var(--accent);transform:translateY(-4px)}
.value-icon{width:40px;height:40px;margin:0 auto 16px;color:var(--accent)}
.value-icon svg{width:40px;height:40px}
.value-card h3{font-size:16px;font-weight:600;margin-bottom:8px;color:#fff}
.value-card p{font-size:13px;color:var(--text2);line-height:1.6}

/* === CTA SECTION === */
.section--cta{background:linear-gradient(160deg,#000 0%,#0e1a24 50%,#000 100%);padding:80px 0;border-top:1px solid var(--border)}
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:800px;margin:0 auto}
.contact-card{display:flex;flex-direction:column;align-items:center;gap:12px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:32px 24px;text-align:center;transition:all 0.3s}
.contact-card:hover{border-color:var(--accent);transform:translateY(-4px)}
.contact-card svg{width:36px;height:36px}
.contact-card h3{font-size:16px;font-weight:600;color:#fff}
.contact-card p{font-size:14px;color:var(--text2)}

/* === FOOTER === */
.footer{background:#080808;color:#fff;padding:56px 0 0;border-top:1px solid var(--border)}
.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px;padding-bottom:48px}
.footer-brand img{margin-bottom:16px}
.footer-brand p{font-size:13px;color:var(--text3);line-height:1.6}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links h4{font-size:13px;font-weight:600;color:var(--text2);margin-bottom:4px;text-transform:uppercase;letter-spacing:0.5px}
.footer-links a{font-size:13px;color:var(--text3);transition:color 0.2s}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.06);padding:20px 0}
.footer-bottom p{font-size:11px;color:var(--text3);text-align:center}

/* === WHATSAPP FLOAT === */
.wa-float{position:fixed;bottom:28px;right:28px;z-index:90;width:56px;height:56px;background:var(--green-wa);border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 16px rgba(37,211,102,0.35);transition:transform 0.3s,box-shadow 0.3s}
.wa-float:hover{transform:scale(1.1);box-shadow:0 6px 24px rgba(37,211,102,0.5)}
.wa-float svg{width:28px;height:28px;fill:#fff}

/* === ANIMATIONS === */
.fade-in{opacity:0;transform:translateY(24px);transition:opacity 0.6s ease,transform 0.6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* === RESPONSIVE === */
@media(max-width:1024px){
  .products-grid{grid-template-columns:1fr 1fr}
  .benefits-grid{grid-template-columns:repeat(2,1fr)}
  .value-grid{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr 1fr}
}

@media(max-width:768px){
  .section{padding:64px 0}
  .section-title{font-size:28px}
  .section-sub{font-size:15px;margin-bottom:40px}
  .hero{min-height:auto;padding:100px 0 60px}
  .hero h1{font-size:36px}
  .hero-sub{font-size:16px}

  .nav-links{position:fixed;top:56px;left:0;right:0;background:rgba(13,13,13,0.97);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);flex-direction:column;padding:16px;border-bottom:1px solid var(--border);display:none}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 16px;font-size:16px;width:100%}
  .nav-cta{display:none}
  .nav-toggle{display:flex}

  .products-grid{grid-template-columns:1fr}
  .benefits-grid{grid-template-columns:1fr}
  .value-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr;max-width:360px}
  .footer-inner{grid-template-columns:1fr;gap:32px}
  .hero-ctas{flex-direction:column;align-items:flex-start}
  .hero-ctas .btn{width:100%;text-align:center}
}

@media(max-width:480px){
  .hero h1{font-size:30px}
  .product-price-amount{font-size:34px}
  .wa-float{bottom:20px;right:20px;width:50px;height:50px}
  .wa-float svg{width:24px;height:24px}
}