*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;

  --clr-white:#fff;
  --clr-bg:#fff;
  --clr-surface:#f8fafc;
  --clr-surface-2:#f1f5f9;
  --clr-text:#0f172a;
  --clr-text-2:#475569;
  --clr-text-3:#94a3b8;
  --clr-border:#e2e8f0;
  --clr-primary:#1d4ed8;
  --clr-primary-hover:#1e40af;
  --clr-primary-light:#eff6ff;
  --clr-accent:#059669;
  --clr-accent-hover:#047857;
  --clr-accent-light:#ecfdf5;
  --clr-hero-bg:#f0f5ff;
  --clr-card-shadow:rgba(0,0,0,.06);

  --radius:12px;
  --radius-sm:8px;
  --radius-lg:20px;
  --shadow-sm:0 1px 3px rgba(0,0,0,.08),0 1px 2px rgba(0,0,0,.06);
  --shadow-md:0 4px 12px rgba(0,0,0,.08);
  --shadow-lg:0 10px 40px rgba(0,0,0,.1);
  --max-w:1200px;
  --nav-h:72px
}

[data-theme=dark]{
  --clr-bg:#0b1120;
  --clr-surface:#111827;
  --clr-surface-2:#1e293b;
  --clr-text:#f1f5f9;
  --clr-text-2:#94a3b8;
  --clr-text-3:#64748b;
  --clr-border:#1e293b;
  --clr-primary:#3b82f6;
  --clr-primary-hover:#60a5fa;
  --clr-primary-light:#172554;
  --clr-accent:#34d399;
  --clr-accent-hover:#6ee7b7;
  --clr-accent-light:#064e3b;
  --clr-hero-bg:#0f1729;
  --clr-card-shadow:rgba(0,0,0,.3)
}

html{scroll-behavior:smooth;scroll-padding-top:var(--nav-h)}
body{
  font-family:var(--font);
  background:var(--clr-bg);
  color:var(--clr-text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  transition:background .3s,color .3s
}

img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{width:100%;max-width:var(--max-w);margin:0 auto;padding:0 24px}

.text-accent{color:var(--clr-primary)}

/* ---- Nav ---- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:var(--nav-h);
  background:var(--clr-bg);
  border-bottom:1px solid var(--clr-border);
  transition:background .3s,border-color .3s,box-shadow .3s
}
.nav--scrolled{box-shadow:0 1px 8px rgba(0,0,0,.08)}
.nav__inner{display:flex;align-items:center;height:100%;gap:32px}
.nav__logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav__logo-text{font-weight:700;font-size:1.1rem;color:var(--clr-text);transition:color .3s}
.nav__menu{display:flex;align-items:center;gap:24px;flex:1;justify-content:flex-end}
.nav__link{
  font-size:.9rem;font-weight:500;color:var(--clr-text-2);
  transition:color .2s;position:relative
}
.nav__link:hover,.nav__link:focus-visible{color:var(--clr-primary)}
.nav__actions{display:flex;align-items:center;gap:12px;margin-left:16px;padding-left:16px;border-left:1px solid var(--clr-border)}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px;z-index:1001}
.nav__toggle-bar{display:block;width:24px;height:2px;background:var(--clr-text);border-radius:2px;transition:all .3s}
.nav__toggle.active .nav__toggle-bar:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav__toggle.active .nav__toggle-bar:nth-child(2){opacity:0}
.nav__toggle.active .nav__toggle-bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---- Theme Toggle ---- */
.theme-toggle{
  background:var(--clr-surface-2);border:none;border-radius:50%;
  width:40px;height:40px;display:flex;align-items:center;justify-content:center;
  cursor:pointer;color:var(--clr-text-2);transition:all .3s;flex-shrink:0
}
.theme-toggle:hover{background:var(--clr-border);color:var(--clr-text)}
.theme-toggle__icon{position:absolute;transition:all .3s}
[data-theme=light] .theme-toggle__icon--sun{opacity:1;transform:rotate(0) scale(1)}
[data-theme=light] .theme-toggle__icon--moon{opacity:0;transform:rotate(90deg) scale(0)}
[data-theme=dark] .theme-toggle__icon--sun{opacity:0;transform:rotate(-90deg) scale(0)}
[data-theme=dark] .theme-toggle__icon--moon{opacity:1;transform:rotate(0) scale(1)}

/* ---- Buttons ---- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font);font-weight:600;font-size:.9rem;
  padding:10px 20px;border-radius:var(--radius-sm);
  border:2px solid transparent;cursor:pointer;
  transition:all .2s;white-space:nowrap
}
.btn--primary{
  background:var(--clr-primary);color:var(--clr-white);border-color:var(--clr-primary)
}
.btn--primary:hover{background:var(--clr-primary-hover);border-color:var(--clr-primary-hover)}
.btn--outline{
  background:transparent;color:var(--clr-primary);border-color:var(--clr-primary)
}
.btn--outline:hover{background:var(--clr-primary);color:var(--clr-white)}
.btn--ghost{background:transparent;color:var(--clr-text-2);border-color:transparent}
.btn--ghost:hover{color:var(--clr-primary);background:var(--clr-surface-2)}
.btn--lg{padding:14px 28px;font-size:1rem;border-radius:var(--radius)}

/* ---- Section common ---- */
section{padding:100px 0}
.section-header{text-align:center;margin-bottom:64px}
.section-badge{
  display:inline-block;padding:4px 14px;border-radius:999px;
  background:var(--clr-primary-light);color:var(--clr-primary);
  font-size:.8rem;font-weight:600;margin-bottom:16px;letter-spacing:.3px
}
.section-title{
  font-size:clamp(1.75rem,4vw,2.75rem);font-weight:800;
  line-height:1.2;margin-bottom:16px
}
.section-subtitle{font-size:1.1rem;color:var(--clr-text-2);max-width:640px;margin:0 auto}

/* ---- Hero ---- */
.hero{
  padding:160px 0 100px;
  background:linear-gradient(180deg,var(--clr-hero-bg) 0%,var(--clr-bg) 100%);
  overflow:hidden;position:relative;transition:background .3s
}
.hero__inner{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.hero__badge{
  display:inline-block;padding:6px 16px;border-radius:999px;
  background:var(--clr-primary-light);color:var(--clr-primary);
  font-size:.85rem;font-weight:600;margin-bottom:24px;letter-spacing:.3px
}
.hero__title{
  font-size:clamp(2rem,5vw,3.5rem);font-weight:800;
  line-height:1.15;margin-bottom:20px;letter-spacing:-.5px
}
.hero__subtitle{font-size:1.1rem;color:var(--clr-text-2);margin-bottom:32px;max-width:540px;line-height:1.7}
.hero__actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:48px}
.hero__stats{display:flex;gap:40px}
.stat{text-align:left}
.stat__number{
  font-size:1.75rem;font-weight:800;color:var(--clr-primary);
  display:block;line-height:1
}
.stat__label{font-size:.85rem;color:var(--clr-text-3);margin-top:4px;display:block}

/* ---- Mockup ---- */
.hero__visual{position:relative}
.mockup{
  background:var(--clr-surface);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);
  border:1px solid var(--clr-border);
  overflow:hidden;
  transition:background .3s,border-color .3s
}
.mockup__header{
  display:flex;align-items:center;gap:12px;
  padding:14px 20px;
  background:var(--clr-surface-2);
  border-bottom:1px solid var(--clr-border);
  transition:background .3s,border-color .3s
}
.mockup__dots{display:flex;gap:6px}
.mockup__dots span{width:10px;height:10px;border-radius:50%;background:var(--clr-text-3)}
.mockup__title{font-size:.8rem;font-weight:600;color:var(--clr-text-3)}
.mockup__body{display:grid;grid-template-columns:80px 1fr;min-height:280px}
.mockup__sidebar{
  background:var(--clr-surface-2);padding:12px 8px;
  display:flex;flex-direction:column;gap:8px;
  border-right:1px solid var(--clr-border);
  transition:background .3s,border-color .3s
}
.mockup__menu-item{
  height:16px;border-radius:4px;background:var(--clr-border)
}
.mockup__menu-item.active{background:var(--clr-primary);opacity:.6}
.mockup__content{padding:16px;display:flex;flex-direction:column;gap:12px}
.mockup__content-header{height:18px;width:60%;border-radius:4px;background:var(--clr-border)}
.mockup__card{height:40px;border-radius:6px;background:var(--clr-border);opacity:.5}
.hero__decoration{
  position:absolute;border-radius:50%;z-index:-1;
  pointer-events:none;opacity:.15;filter:blur(60px)
}
.hero__decoration--1{
  width:400px;height:400px;background:var(--clr-primary);
  top:-100px;right:-100px
}
.hero__decoration--2{
  width:250px;height:250px;background:var(--clr-accent);
  bottom:-50px;left:-50px
}

/* ---- Problem ---- */
.problem{background:var(--clr-surface);transition:background .3s}
.problem__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px}
.problem__card{
  background:var(--clr-bg);padding:32px 24px;border-radius:var(--radius);
  border:1px solid var(--clr-border);transition:all .3s
}
.problem__card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.problem__icon{font-size:2rem;margin-bottom:16px}
.problem__card h3{font-size:1.1rem;font-weight:700;margin-bottom:8px}
.problem__card p{font-size:.9rem;color:var(--clr-text-2);line-height:1.6}

/* ---- Features ---- */
.features{background:var(--clr-bg);transition:background .3s}
.features__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px}
.feature-card{
  background:var(--clr-surface);padding:32px 24px;border-radius:var(--radius);
  border:1px solid var(--clr-border);transition:all .4s;position:relative;overflow:hidden
}
.feature-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:var(--icon-color);transform:scaleX(0);transform-origin:left;
  transition:transform .4s
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.feature-card:hover::before{transform:scaleX(1)}
.feature-card__icon{
  width:52px;height:52px;border-radius:var(--radius-sm);
  display:flex;align-items:center;justify-content:center;
  background:color-mix(in srgb,var(--icon-color) 12%,transparent);
  color:var(--icon-color);margin-bottom:20px;transition:background .3s
}
.feature-card__title{font-size:1.1rem;font-weight:700;margin-bottom:8px}
.feature-card__desc{font-size:.9rem;color:var(--clr-text-2);line-height:1.65}

/* ---- Benefits ---- */
.benefits{background:var(--clr-surface);transition:background .3s}
.benefits__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:32px}
.benefit-card{text-align:center;padding:32px 20px}
.benefit-card__icon{
  width:64px;height:64px;margin:0 auto 20px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--clr-primary-light);color:var(--clr-primary)
}
.benefit-card h3{font-size:1.05rem;font-weight:700;margin-bottom:8px}
.benefit-card p{font-size:.9rem;color:var(--clr-text-2);line-height:1.6}

/* ---- How it works ---- */
.how-it-works{background:var(--clr-bg);transition:background .3s}
.steps{max-width:700px;margin:0 auto}
.step{display:flex;gap:24px;align-items:flex-start}
.step__number{
  width:48px;height:48px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:var(--clr-primary);color:var(--clr-white);
  font-weight:800;font-size:1.2rem
}
.step__content h3{font-size:1.15rem;font-weight:700;margin-bottom:6px}
.step__content p{font-size:.95rem;color:var(--clr-text-2);line-height:1.6}
.step-connector{
  width:2px;height:40px;background:var(--clr-border);
  margin:8px 0 8px 23px
}

/* ---- Pricing ---- */
.pricing{background:var(--clr-surface);transition:background .3s}
.pricing__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:32px;align-items:start}
.pricing-card{
  background:var(--clr-bg);border-radius:var(--radius-lg);
  border:1px solid var(--clr-border);padding:40px 32px;
  transition:all .3s;position:relative;cursor:pointer;user-select:none
}
.pricing-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.pricing-card.active{
  transform:translateY(-6px)
}
.pricing-card.active.pricing-card--basic{
  border-color:#059669;
  box-shadow:0 0 0 2px #059669,var(--shadow-lg)
}
.pricing-card.active.pricing-card--standard{
  border-color:#2563eb;
  box-shadow:0 0 0 2px #2563eb,var(--shadow-lg)
}
.pricing-card.active.pricing-card--pro{
  border-color:#7c3aed;
  box-shadow:0 0 0 2px #7c3aed,var(--shadow-lg)
}
.pricing-card.active .pricing-card__btn{opacity:1}
.pricing-card__badge{
  display:inline-block;
  padding:4px 14px;border-radius:999px;font-size:.8rem;font-weight:700;
  margin-bottom:8px;transition:transform .35s cubic-bezier(.34,1.56,.64,1),box-shadow .35s,opacity .35s
}
.pricing-card.active .pricing-card__badge{
  transform:translateY(-3px) scale(1.07);
  box-shadow:0 3px 10px rgba(0,0,0,.18)
}
.pricing-card__header{text-align:center;padding-bottom:24px;border-bottom:1px solid var(--clr-border)}
.pricing-card__name{font-size:1.1rem;font-weight:600;color:var(--clr-text-2);margin-bottom:12px}
.pricing-card__price{margin-bottom:8px}
.pricing-card__amount{font-size:2.75rem;font-weight:800}
.pricing-card__period{color:var(--clr-text-3);font-size:.95rem}
.pricing-card__desc{font-size:.85rem;color:var(--clr-text-3);margin-top:4px}
.pricing-card__setup{font-size:.8rem;color:var(--clr-text-3);margin-top:2px}
.pricing-card__features{padding:24px 0;display:flex;flex-direction:column;gap:14px}
.pricing-card__features li{
  display:flex;align-items:center;gap:10px;
  font-size:.9rem;color:var(--clr-text-2)
}
.pricing-card__features li svg{color:var(--clr-accent);flex-shrink:0}
.pricing-card__btn{width:100%}
.pricing-card__footnote{
  text-align:center;font-size:.85rem;font-style:italic;
  color:var(--clr-text-3);margin-bottom:16px;line-height:1.4
}
.pricing-card--basic .pricing-card__header .pricing-card__name{color:#059669}
.pricing-card--standard .pricing-card__header .pricing-card__name{color:#2563eb}
.pricing-card--pro .pricing-card__header .pricing-card__name{color:#7c3aed}


.cta{padding:80px 0;background:var(--clr-bg);transition:background .3s}
.cta__box{
  text-align:center;padding:64px 40px;border-radius:var(--radius-lg);
  background:linear-gradient(135deg,var(--clr-primary) 0%,#2563eb 100%);
  color:var(--clr-white)
}
.cta__title{font-size:clamp(1.5rem,3vw,2.25rem);font-weight:800;margin-bottom:16px}
.cta__text{font-size:1.05rem;opacity:.9;margin-bottom:32px;max-width:500px;margin-left:auto;margin-right:auto}
.cta__box .btn--primary{background:var(--clr-white);color:var(--clr-primary);border-color:var(--clr-white)}
.cta__box .btn--primary:hover{background:transparent;color:var(--clr-white)}

/* ---- Footer ---- */
.footer{background:var(--clr-surface);border-top:1px solid var(--clr-border);padding:64px 0 32px;transition:all .3s}
.footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;padding-bottom:48px;border-bottom:1px solid var(--clr-border)}
.footer__brand .nav__logo{margin-bottom:16px}
.footer__desc{font-size:.9rem;color:var(--clr-text-2);line-height:1.6;max-width:300px}
.footer__heading{font-size:.85rem;font-weight:700;text-transform:uppercase;letter-spacing:1px;margin-bottom:16px;color:var(--clr-text-2)}
.footer__links{display:flex;flex-direction:column;gap:10px}
.footer__links a{font-size:.9rem;color:var(--clr-text-3);transition:color .2s}
.footer__links a:hover{color:var(--clr-primary)}
.footer__bottom{text-align:center;padding-top:32px}
.footer__bottom p{font-size:.85rem;color:var(--clr-text-3)}

/* ---- Animations ---- */
.feature-card,.benefit-card,.step{opacity:0;transform:translateY(30px);transition:opacity .6s ease,transform .6s ease}
.feature-card.visible,.benefit-card.visible,.step.visible{opacity:1;transform:translateY(0)}
.feature-card:nth-child(1){transition-delay:0s}
.feature-card:nth-child(2){transition-delay:.05s}
.feature-card:nth-child(3){transition-delay:.1s}
.feature-card:nth-child(4){transition-delay:.15s}
.feature-card:nth-child(5){transition-delay:.2s}
.feature-card:nth-child(6){transition-delay:.25s}
.feature-card:nth-child(7){transition-delay:.3s}
.feature-card:nth-child(8){transition-delay:.35s}

/* ---- Responsive ---- */
@media(max-width:1024px){
  .hero__inner{grid-template-columns:1fr;gap:48px}
  .hero__visual{display:none}
  .hero__stats{justify-content:center}
  .hero__content{text-align:center}
  .hero__subtitle{margin-left:auto;margin-right:auto}
  .hero__actions{justify-content:center}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:768px){
  section{padding:64px 0}
  .nav__menu{
    position:fixed;top:var(--nav-h);left:0;right:0;
    background:var(--clr-bg);flex-direction:column;padding:24px;
    gap:16px;border-bottom:1px solid var(--clr-border);
    transform:translateY(-110%);opacity:0;
    transition:all .3s;box-shadow:var(--shadow-md);
    align-items:stretch
  }
  .nav__menu.open{transform:translateY(0);opacity:1}
  .nav__link{padding:8px 0;font-size:1rem}
  .nav__actions{margin-left:0;padding-left:0;border-left:none;flex-wrap:wrap}
  .nav__toggle{display:flex}
  .hero__stats{gap:24px}
  .stat__number{font-size:1.4rem}
  .hero{padding:120px 0 64px}
  .pricing__grid{grid-template-columns:1fr;max-width:400px;margin:0 auto}
  .footer__grid{grid-template-columns:1fr;gap:32px}
  .section-header{margin-bottom:40px}
}
@media(max-width:480px){
  .container{padding:0 16px}
  .hero__actions{flex-direction:column}
  .hero__actions .btn{width:100%}
  .hero__stats{flex-direction:column;gap:16px;align-items:center}
  .stat{text-align:center}
  .problem__grid{grid-template-columns:1fr}
  .features__grid{grid-template-columns:1fr}
  .benefits__grid{grid-template-columns:1fr}
}