/* ===== RESET & BASE ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color:#1e293b;
  background:#fff;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.2;font-weight:700;letter-spacing:-0.02em}

/* ===== LOGO FONT ===== */
@font-face{
  font-family:'Hangbird';
  src:url('fonts/hangbird-regular.otf') format('opentype');
  font-weight:400;
  font-style:normal;
  font-display:swap;
}

/* ===== CUSTOM PROPERTIES ===== */
:root{
  --green-500:#22c55e;
  --green-600:#16a34a;
  --emerald-500:#10b981;
  --cyan-500:#06b6d4;
  --dark:#0a0f1c;
  --dark-lighter:#111827;
  --surface-alt:#f8fafc;
  --text-muted:#64748b;
  --text-light:#cbd5e1;
  --radius:12px;
  --radius-lg:20px;
  --transition:0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ===== UTILITIES ===== */
.container{max-width:1140px;margin:0 auto;padding:0 24px}
.container-narrow{max-width:780px}
.gradient-text{
  background:linear-gradient(135deg, var(--green-500), var(--emerald-500), var(--cyan-500));
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}

/* ===== BUTTONS ===== */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-weight:600;font-size:0.95rem;
  border:none;border-radius:10px;cursor:pointer;
  padding:12px 24px;
  background:linear-gradient(135deg, var(--green-500), var(--emerald-500));
  color:#fff;
  transition:var(--transition);
  text-decoration:none;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-1px);box-shadow:0 8px 24px rgba(34,197,94,0.3)}
.btn-lg{padding:16px 32px;font-size:1.05rem;border-radius:12px}
.btn-sm{padding:9px 20px;font-size:0.85rem;border-radius:8px}
.btn-outline{
  background:transparent;
  border:1.5px solid rgba(255,255,255,0.25);
  color:#fff;
}
.btn-outline:hover{border-color:rgba(255,255,255,0.5);background:rgba(255,255,255,0.05);box-shadow:none;transform:translateY(-1px)}
.btn-white{
  background:#fff;
  color:var(--dark);
}
.btn-white:hover{background:#f1f5f9;box-shadow:0 8px 24px rgba(255,255,255,0.15)}

/* ===== HEADER ===== */
.header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  padding:16px 0;
  transition:var(--transition);
}
.header.scrolled{
  background:rgba(10,15,28,0.85);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  padding:10px 0;
  box-shadow:0 1px 0 rgba(255,255,255,0.06);
}
.header-inner{display:flex;align-items:center;gap:40px}

.logo{
  font-family:'Hangbird', sans-serif;
  font-size:1.65rem;font-weight:400;
  background:linear-gradient(135deg, #22c55e 0%, #16a34a 50%, #10b981 100%);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
  letter-spacing:0.02em;
  padding-right:0.3em;
}

.nav{display:flex;gap:32px;margin-right:auto}
.nav a{
  color:var(--text-light);font-size:0.9rem;font-weight:500;
  transition:color var(--transition);
}
.nav a:hover{color:#fff}

.hamburger{
  display:none;
  flex-direction:column;gap:5px;
  background:none;border:none;cursor:pointer;padding:4px;
  margin-left:auto;
}
.hamburger span{
  width:22px;height:2px;background:#fff;
  transition:var(--transition);border-radius:2px;
}
.hamburger.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.hamburger.active span:nth-child(2){opacity:0}
.hamburger.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* ===== HERO ===== */
.hero{
  position:relative;
  background:var(--dark);
  padding:160px 0 100px;
  overflow:hidden;
  min-height:90vh;
  display:flex;
  align-items:center;
}

.hero-glow{position:absolute;border-radius:50%;pointer-events:none}
.hero-glow-1{
  width:700px;height:700px;
  background:radial-gradient(circle, rgba(34,197,94,0.12) 0%, transparent 70%);
  top:-250px;right:-150px;
  animation:glow-float 25s ease-in-out infinite;
}
.hero-glow-2{
  width:500px;height:500px;
  background:radial-gradient(circle, rgba(6,182,212,0.08) 0%, transparent 70%);
  bottom:-150px;left:-100px;
  animation:glow-float 25s ease-in-out 12s infinite reverse;
}

.hero-grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse at 50% 50%, black 20%, transparent 70%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 50%, black 20%, transparent 70%);
}

.hero-content{position:relative;z-index:1;text-align:center;max-width:800px;margin:0 auto}

.hero-badge{
  display:inline-block;
  padding:6px 16px;
  border:1px solid rgba(34,197,94,0.3);
  border-radius:100px;
  font-size:0.8rem;font-weight:600;
  color:var(--green-500);
  background:rgba(34,197,94,0.06);
  margin-bottom:28px;
  letter-spacing:0.02em;
}

.hero h1{
  font-size:clamp(2.4rem, 5.5vw, 4rem);
  color:#fff;
  margin-bottom:24px;
  letter-spacing:-0.03em;
}

.hero-sub{
  font-size:clamp(1rem, 2vw, 1.2rem);
  color:var(--text-light);
  max-width:600px;
  margin:0 auto 40px;
  line-height:1.7;
}

.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:60px}

.hero-proof{
  display:flex;align-items:center;justify-content:center;gap:32px;
  flex-wrap:wrap;
}
.hero-proof-item{display:flex;flex-direction:column;align-items:center;gap:2px}
.hero-proof-item strong{
  font-size:1.3rem;color:#fff;font-weight:700;
}
.hero-proof-item span{font-size:0.8rem;color:var(--text-muted)}
.hero-proof-sep{width:1px;height:36px;background:rgba(255,255,255,0.1)}

/* ===== SECTIONS ===== */
.section{padding:100px 0}
.section-alt{background:var(--surface-alt)}

.section-header{text-align:center;margin-bottom:60px}
.section-header h2{font-size:clamp(1.6rem, 3.5vw, 2.2rem);margin-bottom:16px}
.section-sub{
  font-size:1.05rem;color:var(--text-muted);
  max-width:560px;margin:0 auto;line-height:1.6;
}

/* ===== PROBLEM CARDS ===== */
.problems-grid{
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  gap:20px;
}
.problem-card{
  padding:32px;
  background:#fff;
  border:1px solid #e2e8f0;
  border-radius:var(--radius);
  transition:var(--transition);
}
.problem-card:hover{
  border-color:#cbd5e1;
  box-shadow:0 4px 20px rgba(0,0,0,0.04);
  transform:translateY(-2px);
}
.problem-icon{
  width:48px;height:48px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg, rgba(34,197,94,0.08), rgba(6,182,212,0.08));
  border-radius:12px;
  margin-bottom:20px;
  color:var(--green-600);
}
.problem-card h3{font-size:1.1rem;margin-bottom:10px;font-weight:650}
.problem-card p{font-size:0.92rem;color:var(--text-muted);line-height:1.65}

/* ===== STEPS ===== */
.steps-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:24px;
}
.step-card{
  padding:36px 28px;
  background:#fff;
  border:1px solid #e2e8f0;
  border-radius:var(--radius);
  text-align:center;
  transition:var(--transition);
}
.step-card:hover{
  border-color:rgba(34,197,94,0.3);
  box-shadow:0 8px 30px rgba(34,197,94,0.06);
  transform:translateY(-3px);
}
.step-num{
  width:48px;height:48px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:1.2rem;font-weight:800;
  background:linear-gradient(135deg, var(--green-500), var(--emerald-500));
  color:#fff;
  border-radius:14px;
  margin-bottom:24px;
}
.step-card h3{font-size:1.05rem;margin-bottom:12px;font-weight:650}
.step-card p{font-size:0.92rem;color:var(--text-muted);line-height:1.65}

/* ===== FEATURES ===== */
.features-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:20px;
}
.feature-card{
  padding:32px 28px;
  background:#fff;
  border:1px solid #e2e8f0;
  border-radius:var(--radius);
  transition:var(--transition);
}
.feature-card:hover{
  border-color:transparent;
  background:
    linear-gradient(#fff, #fff) padding-box,
    linear-gradient(135deg, rgba(34,197,94,0.4), rgba(6,182,212,0.4)) border-box;
  border:1px solid transparent;
  box-shadow:0 4px 20px rgba(0,0,0,0.04);
  transform:translateY(-2px);
}
.feature-icon{
  width:44px;height:44px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg, rgba(34,197,94,0.08), rgba(6,182,212,0.08));
  border-radius:10px;
  margin-bottom:20px;
  color:var(--green-600);
}
.feature-card h3{font-size:1rem;margin-bottom:10px;font-weight:650}
.feature-card p{font-size:0.88rem;color:var(--text-muted);line-height:1.65}

/* ===== USE CASES ===== */
.use-case-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:24px;
}
.use-case-card{
  padding:36px 28px;
  background:#fff;
  border:1px solid #e2e8f0;
  border-radius:var(--radius);
  transition:var(--transition);
}
.use-case-card:hover{
  box-shadow:0 4px 20px rgba(0,0,0,0.04);
  transform:translateY(-2px);
}
.use-case-card h3{
  font-size:1.05rem;font-weight:650;margin-bottom:12px;
  color:var(--green-600);
}
.use-case-card p{font-size:0.92rem;color:var(--text-muted);line-height:1.65}

/* ===== FAQ ===== */
.faq-list{display:flex;flex-direction:column;gap:12px}

.faq-item{
  background:#fff;
  border:1px solid #e2e8f0;
  border-radius:var(--radius);
  overflow:hidden;
  transition:var(--transition);
}
.faq-item[open]{border-color:#cbd5e1;box-shadow:0 2px 12px rgba(0,0,0,0.04)}

.faq-item summary{
  padding:20px 24px;
  font-weight:600;font-size:1rem;
  cursor:pointer;
  list-style:none;
  display:flex;align-items:center;justify-content:space-between;
  transition:color var(--transition);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:'+';
  font-size:1.3rem;font-weight:400;
  color:var(--text-muted);
  transition:transform var(--transition);
  flex-shrink:0;margin-left:16px;
}
.faq-item[open] summary::after{content:'−'}
.faq-item[open] summary{color:var(--green-600)}

.faq-answer{
  padding:0 24px 20px;
}
.faq-answer p{
  font-size:0.92rem;color:var(--text-muted);line-height:1.7;
}
.faq-answer p+p{margin-top:12px}

/* ===== CTA SECTION ===== */
.cta-section{
  position:relative;
  background:var(--dark);
  padding:100px 0;
  overflow:hidden;
  text-align:center;
}
.cta-glow{position:absolute;border-radius:50%;pointer-events:none}
.cta-glow-1{
  width:500px;height:500px;
  background:radial-gradient(circle, rgba(34,197,94,0.1) 0%, transparent 70%);
  top:-200px;left:50%;transform:translateX(-50%);
}
.cta-glow-2{
  width:400px;height:400px;
  background:radial-gradient(circle, rgba(6,182,212,0.06) 0%, transparent 70%);
  bottom:-200px;right:-100px;
}
.cta-content{position:relative;z-index:1}
.cta-section h2{
  font-size:clamp(1.8rem, 4vw, 2.6rem);
  color:#fff;margin-bottom:20px;
  letter-spacing:-0.02em;
}
.cta-section p{
  font-size:1.1rem;color:var(--text-light);
  margin-bottom:36px;max-width:500px;margin-left:auto;margin-right:auto;
}

/* ===== FOOTER ===== */
.footer{
  background:#070a14;
  padding:60px 0 32px;
  border-top:1px solid rgba(255,255,255,0.06);
}
.footer-inner{
  display:grid;
  grid-template-columns:1fr auto;
  gap:40px 80px;
}
.footer-brand p{font-size:0.85rem;color:var(--text-muted);margin-top:12px;line-height:1.6}
.footer-links{display:flex;gap:64px}
.footer-col{display:flex;flex-direction:column;gap:10px}
.footer-col h4{font-size:0.75rem;text-transform:uppercase;letter-spacing:0.08em;color:var(--text-muted);margin-bottom:4px}
.footer-col a{font-size:0.88rem;color:var(--text-light);transition:color var(--transition)}
.footer-col a:hover{color:#fff}
.footer-bottom{
  grid-column:1/-1;
  padding-top:32px;
  border-top:1px solid rgba(255,255,255,0.06);
}
.footer-bottom p{font-size:0.8rem;color:var(--text-muted)}

/* ===== ANIMATIONS ===== */
@keyframes glow-float{
  0%,100%{transform:translate(0,0)}
  33%{transform:translate(40px,-30px)}
  66%{transform:translate(-20px,20px)}
}

.fade-up{
  opacity:0;
  transform:translateY(24px);
  transition:opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible{
  opacity:1;
  transform:translateY(0);
}

.fade-up:nth-child(2){transition-delay:0.08s}
.fade-up:nth-child(3){transition-delay:0.16s}
.fade-up:nth-child(4){transition-delay:0.24s}
.fade-up:nth-child(5){transition-delay:0.32s}
.fade-up:nth-child(6){transition-delay:0.40s}

/* ===== RESPONSIVE ===== */
@media(max-width:1024px){
  .features-grid,.steps-grid,.use-case-grid{grid-template-columns:repeat(2, 1fr)}
}

@media(max-width:768px){
  .hero{padding:130px 0 70px;min-height:auto}
  .hero h1{font-size:2rem}
  .hero-sub{font-size:1rem}
  .hero-proof{gap:20px}
  .hero-proof-sep{display:none}

  .section{padding:70px 0}
  .section-header{margin-bottom:40px}

  .problems-grid,.features-grid,.steps-grid,.use-case-grid{grid-template-columns:1fr}

  .nav{
    display:none;
    position:fixed;top:60px;left:0;right:0;
    background:rgba(10,15,28,0.97);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    flex-direction:column;
    padding:24px;gap:20px;
    border-bottom:1px solid rgba(255,255,255,0.06);
  }
  .nav.open{display:flex}
  .nav a{font-size:1rem}

  .header-inner .btn{display:none}
  .hamburger{display:flex}

  .footer-inner{grid-template-columns:1fr}
  .footer-links{gap:40px}
  .cta-section{padding:70px 0}
}

@media(max-width:480px){
  .container{padding:0 16px}
  .hero h1{font-size:1.7rem}
  .hero-actions{flex-direction:column;align-items:center}
  .hero-proof-item strong{font-size:1.1rem}
  .problem-card,.step-card,.feature-card,.use-case-card{padding:24px 20px}
}