/* ===== RESET & BASE ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:'Segoe UI',system-ui,-apple-system,sans-serif;color:#1a1a2e;background:#fff;line-height:1.6;min-height:100vh}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{cursor:pointer;border:none;background:none;font:inherit}
ul{list-style:none}
input,textarea,button{font:inherit}
textarea{resize:vertical}

/* ===== TOKENS ===== */
:root{
  --c-primary:#4f46e5;
  --c-primary-dark:#3730a3;
  --c-accent:#06b6d4;
  --c-dark:#0f0e1a;
  --c-text:#374151;
  --c-muted:#6b7280;
  --c-border:#e5e7eb;
  --c-surface:#f9fafb;
  --radius:12px;
  --shadow:0 4px 24px rgba(0,0,0,.08);
  --shadow-lg:0 12px 48px rgba(0,0,0,.14);
  --transition:all .25s ease;
  --nav-h:68px;
}

/* ===== LAYOUT ===== */
.container{width:100%;max-width:1160px;margin:0 auto;padding:0 24px}
.grid{display:grid;gap:24px}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}

/* ===== TYPOGRAPHY ===== */
h1{font-size:clamp(2.2rem,5vw,3.6rem);font-weight:800;line-height:1.1;letter-spacing:-.02em}
h2{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:700;line-height:1.2;letter-spacing:-.01em}
h3{font-size:1.15rem;font-weight:600;margin-bottom:.5rem}
p{color:var(--c-text)}

/* ===== BUTTONS ===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 28px;border-radius:9999px;font-weight:600;font-size:.95rem;background:var(--c-primary);color:#fff;transition:var(--transition);white-space:nowrap}
.btn:hover{background:var(--c-primary-dark);transform:translateY(-2px);box-shadow:0 8px 24px rgba(79,70,229,.35)}
.btn:active{transform:translateY(0)}
.btn--sm{padding:9px 20px;font-size:.85rem}
.btn--ghost{background:transparent;color:var(--c-primary);border:2px solid var(--c-primary)}
.btn--ghost:hover{background:var(--c-primary);color:#fff}

/* ===== BADGE ===== */
.badge{display:inline-block;padding:5px 14px;border-radius:9999px;font-size:.78rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;background:rgba(79,70,229,.1);color:var(--c-primary);margin-bottom:16px}
.badge--alt{background:rgba(6,182,212,.12);color:#0891b2}

/* ===== NAV ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;height:var(--nav-h);background:rgba(255,255,255,.85);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:border-color .3s,box-shadow .3s}
.nav.scrolled{border-color:var(--c-border);box-shadow:0 2px 16px rgba(0,0,0,.06)}
.nav__inner{display:flex;align-items:center;justify-content:space-between;height:100%;max-width:1160px;margin:0 auto;padding:0 24px}
.nav__logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.1rem;color:var(--c-dark)}
.nav__logo img{border-radius:8px}
.nav__links{display:flex;align-items:center;gap:32px;font-size:.9rem;font-weight:500}
.nav__links a:not(.btn){color:var(--c-text);transition:color .2s}
.nav__links a:not(.btn):hover{color:var(--c-primary)}
.nav__toggle{display:none;flex-direction:column;gap:5px;padding:8px;border-radius:8px}
.nav__toggle span{display:block;width:22px;height:2px;background:var(--c-dark);transition:var(--transition);border-radius:2px}
.nav__toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav__toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav__toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== HERO ===== */
.hero{padding:calc(var(--nav-h) + 80px) 0 80px;overflow:hidden}
.hero .container{display:flex;align-items:center;gap:48px}
.hero__content{flex:1;min-width:0}
.hero__content h1{margin-bottom:20px;background:linear-gradient(135deg,var(--c-dark) 0%,var(--c-primary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero__content>p{font-size:1.1rem;color:var(--c-muted);max-width:480px;margin-bottom:32px}
.hero__cta{display:flex;flex-wrap:wrap;gap:12px}
.hero__graphic{flex:0 0 auto;max-width:480px}
.hero__graphic img{width:100%;animation:float 5s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-16px)}}

/* ===== SECTION HEADER ===== */
.section-header{text-align:center;margin-bottom:56px}
.section-header h2{margin-bottom:12px}
.section-header p{color:var(--c-muted);font-size:1.05rem;max-width:520px;margin:0 auto}
.section-header--light h2,.section-header--light p{color:#fff}
.section-header--light p{opacity:.8}

/* ===== FEATURES ===== */
.features{padding:100px 0;background:var(--c-surface)}

/* ===== CARD ===== */
.card{background:#fff;border-radius:var(--radius);padding:32px;border:1px solid var(--c-border);transition:var(--transition);position:relative;overflow:hidden}
.card::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(79,70,229,.04),transparent);opacity:0;transition:opacity .3s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:rgba(79,70,229,.2)}
.card:hover::before{opacity:1}
.card__icon{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,rgba(79,70,229,.1),rgba(6,182,212,.1));display:flex;align-items:center;justify-content:center;margin-bottom:20px}
.card h3{color:var(--c-dark)}
.card p{font-size:.93rem;color:var(--c-muted);line-height:1.65}

/* ===== ABOUT ===== */
.about{padding:100px 0}
.about__grid{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.about__text h2{margin-bottom:16px;color:var(--c-dark)}
.about__text p{color:var(--c-muted);margin-bottom:16px}
.about__text .btn{margin-top:8px}
.about__stats{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.stat{text-align:center;padding:28px 20px;border-radius:var(--radius);background:var(--c-surface);border:1px solid var(--c-border)}
.stat__num{font-size:2.6rem;font-weight:800;color:var(--c-primary);line-height:1}
.stat span:not(.stat__num){font-size:1.4rem;font-weight:700;color:var(--c-primary)}
.stat p{font-size:.82rem;color:var(--c-muted);margin-top:6px;font-weight:500;text-transform:uppercase;letter-spacing:.05em}

/* ===== CONTACT ===== */
.contact{padding:100px 0;background:linear-gradient(135deg,var(--c-primary) 0%,#7c3aed 100%)}
.contact__form{max-width:680px;margin:0 auto;background:rgba(255,255,255,.08);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.15);border-radius:20px;padding:48px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:.88rem;font-weight:600;color:rgba(255,255,255,.85)}
.field input,.field textarea{padding:12px 16px;border-radius:10px;border:1.5px solid rgba(255,255,255,.2);background:rgba(255,255,255,.1);color:#fff;outline:none;transition:border-color .2s}
.field input::placeholder,.field textarea::placeholder{color:rgba(255,255,255,.45)}
.field input:focus,.field textarea:focus{border-color:rgba(255,255,255,.7);background:rgba(255,255,255,.15)}
.field input.error,.field textarea.error{border-color:#f87171}
.field__error{font-size:.8rem;color:#fca5a5;min-height:1.2em}
.contact__form .btn{width:100%;justify-content:center;margin-top:8px;background:#fff;color:var(--c-primary)}
.contact__form .btn:hover{background:#f1f5f9;transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.2)}
.form__success{text-align:center;color:#86efac;font-weight:600;font-size:.95rem;min-height:1.5em;margin-top:12px}

/* ===== FOOTER ===== */
.footer{padding:32px 0;background:var(--c-dark);color:rgba(255,255,255,.6)}
.footer__inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.footer__brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:1rem;color:#fff}
.footer__copy{font-size:.85rem}
.footer__links{display:flex;gap:24px;font-size:.85rem}
.footer__links a{transition:color .2s}
.footer__links a:hover{color:#fff}

/* ===== SCROLL REVEAL ===== */
.reveal{opacity:0;transform:translateY(32px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ===== RESPONSIVE ===== */
@media(max-width:900px){
  .hero .container{flex-direction:column;text-align:center}
  .hero__content>p{margin:0 auto 32px}
  .hero__cta{justify-content:center}
  .hero__graphic{max-width:340px}
  .about__grid{grid-template-columns:1fr;gap:48px}
  .about__text{text-align:center}
}
@media(max-width:680px){
  .nav__toggle{display:flex}
  .nav__links{display:none;position:absolute;top:var(--nav-h);left:0;right:0;background:#fff;flex-direction:column;align-items:flex-start;gap:0;padding:16px 24px 24px;border-bottom:1px solid var(--c-border);box-shadow:0 8px 24px rgba(0,0,0,.08)}
  .nav__links.open{display:flex}
  .nav__links a{padding:10px 0;width:100%;border-bottom:1px solid var(--c-border)}
  .nav__links a:last-child{border-bottom:none;margin-top:8px}
  .form-row{grid-template-columns:1fr}
  .contact__form{padding:28px 20px}
  .about__stats{grid-template-columns:1fr 1fr}
  .footer__inner{flex-direction:column;text-align:center}
}
@media(max-width:400px){
  .about__stats{grid-template-columns:1fr}
}