/* ============================
   Gemini Factoring — Design System
   ============================ */

:root{
  --green-50:#e9fff2;
  --green-100:#c8ffe1;
  --green-400:#00e07a;
  --green-500:#00c46a;
  --green-600:#00a558;
  --green-900:#012f21;
  --ink:#06120e;
  --ink-soft:#3b4a45;
  --paper:#ffffff;
  --paper-soft:#f4faf7;
  --border:#dcece4;
  --shadow:0 20px 50px -20px rgba(1,47,33,0.25);
  --radius:20px;
  --font-display:'Space Grotesk', sans-serif;
  --font-body:'Inter', sans-serif;
}

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

html{ scroll-behavior:smooth; }

body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--paper);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  line-height:1.15;
  margin:0 0 .5em;
  color:var(--ink);
}

p{ margin:0 0 1em; color:var(--ink-soft); }

a{ color:inherit; text-decoration:none; }

img,svg{ display:block; max-width:100%; }

.container{
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding:0 24px;
}

.section{ padding:110px 0; position:relative; }

.section-tag{
  display:inline-block;
  font-family:var(--font-display);
  font-weight:600;
  font-size:.85rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--green-600);
  margin-bottom:14px;
}

.center{ text-align:center; margin-left:auto; margin-right:auto; }
.section > .container > h2.center{ max-width:720px; }

.text-gradient{
  background:linear-gradient(100deg,var(--green-500),var(--green-900) 90%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 28px;
  border-radius:999px;
  font-weight:600;
  font-size:.95rem;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s ease;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(120deg,var(--green-500),var(--green-600));
  color:#fff;
  box-shadow:0 12px 30px -10px rgba(0,196,106,.55);
}
.btn-primary:hover{ transform:translateY(-2px); box-shadow:0 16px 34px -8px rgba(0,196,106,.65); }
.btn-ghost{
  background:transparent;
  color:var(--ink);
  border-color:var(--border);
}
.btn-ghost:hover{ border-color:var(--green-500); color:var(--green-600); }
.btn-full{ width:100%; }
.btn-nav{ padding:10px 22px; font-size:.85rem; }

/* ===== Header ===== */
.site-header{
  position:fixed;
  top:0; left:0; right:0;
  z-index:100;
  background:rgba(255,255,255,.7);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.site-header.scrolled{
  background:rgba(255,255,255,.92);
  border-bottom-color:var(--border);
  box-shadow:0 10px 30px -20px rgba(1,47,33,.25);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:76px;
}
.logo{ display:flex; align-items:center; gap:10px; }
.logo-text{ font-family:var(--font-display); font-weight:600; font-size:1.15rem; letter-spacing:-.01em; }
.logo-text strong{ color:var(--green-600); font-weight:700; }

.main-nav{ display:flex; align-items:center; gap:30px; }
.main-nav a{
  font-size:.92rem;
  font-weight:500;
  color:var(--ink-soft);
  position:relative;
  transition:color .2s ease;
}
.main-nav a:not(.btn):hover{ color:var(--green-600); }
.main-nav a:not(.btn)::after{
  content:'';
  position:absolute;
  left:0; bottom:-6px;
  width:0; height:2px;
  background:var(--green-500);
  transition:width .25s ease;
}
.main-nav a:not(.btn):hover::after{ width:100%; }

.nav-toggle{
  display:none;
  flex-direction:column;
  gap:5px;
  background:none;
  border:none;
  cursor:pointer;
  padding:8px;
}
.nav-toggle span{
  width:24px; height:2px; background:var(--ink);
  transition:transform .3s ease, opacity .3s ease;
}

/* ===== Hero ===== */
.hero{
  position:relative;
  padding:170px 0 120px;
  overflow:hidden;
  background:radial-gradient(1200px 600px at 80% -10%, var(--green-50), transparent 60%);
}
.hero-bg{ position:absolute; inset:0; z-index:0; pointer-events:none; }
.grid-lines{
  position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(1,47,33,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(1,47,33,.05) 1px, transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 70% 60% at 60% 20%, black 30%, transparent 75%);
}
.glow{ position:absolute; border-radius:50%; filter:blur(80px); opacity:.55; }
.glow-1{ width:420px; height:420px; background:var(--green-400); top:-140px; right:-100px; }
.glow-2{ width:340px; height:340px; background:var(--green-100); bottom:-120px; left:-80px; }
.hero-orbit{
  position:absolute; top:50%; right:-8%;
  width:560px; height:560px;
  transform:translateY(-50%);
  animation:spin 60s linear infinite;
}
@keyframes spin{ to{ transform:translateY(-50%) rotate(360deg); } }

.hero-inner{ position:relative; z-index:1; max-width:760px; }
.eyebrow{
  font-family:var(--font-display);
  font-size:.8rem;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--green-600);
  margin-bottom:20px;
}
.hero h1{
  font-size:clamp(2.2rem, 5vw, 3.6rem);
  max-width:14ch;
  margin-bottom:.4em;
}
.hero-sub{ font-size:1.15rem; max-width:56ch; margin-bottom:2em; }
.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; margin-bottom:64px; }

.hero-stats{
  display:flex;
  gap:48px;
  flex-wrap:wrap;
  padding-top:36px;
  border-top:1px solid var(--border);
}
.stat{ position:relative; }
.stat-number{
  font-family:var(--font-display);
  font-size:2.2rem;
  font-weight:700;
  color:var(--green-600);
}
.stat-suffix{
  font-family:var(--font-display);
  font-size:1.3rem;
  font-weight:700;
  color:var(--green-600);
}
.stat-label{ display:block; font-size:.85rem; color:var(--ink-soft); margin-top:4px; max-width:16ch; }

/* ===== About ===== */
.about-grid{
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:70px;
  align-items:center;
}
.about-text p{ font-size:1.02rem; }
.about-visual{ display:flex; justify-content:center; }

.orbit-card{
  position:relative;
  width:320px; height:320px;
  display:flex; align-items:center; justify-content:center;
}
.orbit-ring{
  position:absolute; inset:0;
  border:1.5px dashed var(--green-100);
  border-radius:50%;
  animation:spin 30s linear infinite;
}
.orbit-core{
  width:160px; height:160px;
  border-radius:50%;
  background:var(--paper-soft);
  border:1px solid var(--border);
  box-shadow:var(--shadow);
  display:flex; align-items:center; justify-content:center;
}
.orbit-dot{
  position:absolute;
  width:16px; height:16px;
  border-radius:50%;
  background:var(--green-500);
  box-shadow:0 0 0 6px var(--green-50);
}
.orbit-dot.d1{ top:6%; left:50%; }
.orbit-dot.d2{ bottom:14%; left:10%; background:var(--green-900); }
.orbit-dot.d3{ bottom:20%; right:8%; }

/* ===== Services ===== */
.services{ background:var(--paper-soft); }
.cards-grid{
  margin-top:56px;
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:24px;
}
.card{
  background:var(--paper);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:32px 26px;
  transition:transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow);
  border-color:var(--green-100);
}
.card-icon{
  width:52px; height:52px;
  border-radius:14px;
  background:linear-gradient(135deg,var(--green-50),var(--green-100));
  color:var(--green-600);
  display:flex; align-items:center; justify-content:center;
  margin-bottom:20px;
}
.card h3{ font-size:1.1rem; margin-bottom:.4em; }
.card p{ font-size:.92rem; margin-bottom:0; }

/* ===== Advantages ===== */
.advantages-grid{
  margin-top:56px;
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:1px;
  background:var(--border);
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
}
.adv{
  background:var(--paper);
  padding:34px 26px;
  transition:background .3s ease;
}
.adv:hover{ background:var(--green-50); }
.adv-num{
  display:block;
  font-family:var(--font-display);
  font-weight:700;
  font-size:1.4rem;
  color:var(--green-500);
  opacity:.7;
  margin-bottom:12px;
}
.adv h4{ font-size:1rem; margin-bottom:.4em; }
.adv p{ font-size:.88rem; margin-bottom:0; }

/* ===== How it works ===== */
.how{ background:var(--paper-soft); }
.steps{
  margin-top:56px;
  display:flex;
  align-items:flex-start;
  justify-content:center;
  gap:20px;
  flex-wrap:wrap;
}
.step{
  flex:1 1 240px;
  max-width:280px;
  background:var(--paper);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:34px 26px;
  text-align:center;
}
.step-number{
  width:48px; height:48px;
  margin:0 auto 18px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--green-500),var(--green-600));
  color:#fff;
  font-family:var(--font-display);
  font-weight:700;
  font-size:1.2rem;
  display:flex; align-items:center; justify-content:center;
}
.step h4{ font-size:1.05rem; }
.step p{ font-size:.9rem; margin-bottom:0; }
.step-arrow{
  align-self:center;
  color:var(--green-500);
  font-size:1.6rem;
  font-weight:700;
  padding-top:20px;
}

/* ===== FAQ ===== */
.faq-grid{
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  gap:70px;
  align-items:start;
}
.faq-heading h2{ margin-bottom:.5em; }
.faq-list{ display:flex; flex-direction:column; gap:14px; }
.faq-item{
  border:1px solid var(--border);
  border-radius:16px;
  overflow:hidden;
  background:var(--paper);
}
.faq-question{
  width:100%;
  text-align:left;
  background:none;
  border:none;
  padding:22px 24px;
  font-family:var(--font-body);
  font-weight:600;
  font-size:1rem;
  color:var(--ink);
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.faq-icon{
  flex-shrink:0;
  width:28px; height:28px;
  border-radius:50%;
  background:var(--green-50);
  color:var(--green-600);
  display:flex; align-items:center; justify-content:center;
  font-size:1.2rem;
  transition:transform .3s ease, background .3s ease;
}
.faq-item.active .faq-icon{ transform:rotate(45deg); background:var(--green-500); color:#fff; }
.faq-answer{
  max-height:0;
  overflow:hidden;
  transition:max-height .35s ease;
}
.faq-answer p{ padding:0 24px 22px; font-size:.94rem; margin:0; }
.faq-item.active .faq-answer{ max-height:260px; }

/* ===== Contact ===== */
.contact{ background:var(--paper-soft); }
.contact-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:60px;
  align-items:start;
}
.contact-list{ list-style:none; margin:28px 0; padding:0; display:flex; flex-direction:column; gap:20px; }
.contact-list li{ display:flex; gap:14px; align-items:flex-start; }
.contact-icon{ font-size:1.3rem; line-height:1; }
.contact-list strong{ font-size:.95rem; }
.contact-list p{ margin:2px 0 0; font-size:.92rem; }
.contact-list a{ color:var(--green-600); font-weight:600; }

.contact-form{
  background:var(--paper);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:36px;
  box-shadow:var(--shadow);
}
.form-row{ margin-bottom:18px; }
.form-row label{ display:block; font-size:.85rem; font-weight:600; margin-bottom:6px; }
.form-row input, .form-row textarea{
  width:100%;
  padding:12px 14px;
  border:1px solid var(--border);
  border-radius:10px;
  font-family:var(--font-body);
  font-size:.95rem;
  background:var(--paper-soft);
  transition:border-color .2s ease, box-shadow .2s ease;
  resize:vertical;
}
.form-row input:focus, .form-row textarea:focus{
  outline:none;
  border-color:var(--green-500);
  box-shadow:0 0 0 3px var(--green-50);
}
.form-status{ margin-top:14px; font-size:.9rem; font-weight:600; color:var(--green-600); min-height:1.2em; }

/* ===== Footer ===== */
.site-footer{ background:var(--ink); color:#cfe8dc; padding:60px 0 30px; }
.footer-inner{ display:flex; flex-direction:column; align-items:center; text-align:center; gap:18px; }
.footer-brand{ display:flex; align-items:center; gap:10px; font-family:var(--font-display); font-weight:600; font-size:1.1rem; color:#fff; }
.footer-text{ max-width:44ch; color:#9fc1b0; font-size:.9rem; }
.footer-nav{ display:flex; gap:24px; flex-wrap:wrap; justify-content:center; }
.footer-nav a{ font-size:.88rem; color:#cfe8dc; transition:color .2s ease; }
.footer-nav a:hover{ color:var(--green-400); }
.footer-copy{ font-size:.8rem; color:#7fa393; margin-top:14px; }

/* ===== Reveal animation ===== */
.reveal{
  opacity:0;
  transform:translateY(24px);
  transition:opacity .7s ease, transform .7s ease;
}
.reveal.in-view{ opacity:1; transform:translateY(0); }

/* ===== Responsive ===== */
@media (max-width: 980px){
  .cards-grid{ grid-template-columns:repeat(2,1fr); }
  .advantages-grid{ grid-template-columns:repeat(2,1fr); }
  .about-grid, .faq-grid, .contact-grid{ grid-template-columns:1fr; }
  .about-visual{ order:-1; }
  .hero-orbit{ display:none; }
}

@media (max-width: 760px){
  .main-nav{
    position:fixed;
    top:76px; left:0; right:0;
    background:#fff;
    flex-direction:column;
    align-items:flex-start;
    gap:0;
    padding:10px 24px 20px;
    border-bottom:1px solid var(--border);
    transform:translateY(-130%);
    opacity:0;
    transition:transform .3s ease, opacity .3s ease;
  }
  .main-nav.open{ transform:translateY(0); opacity:1; }
  .main-nav a{ padding:12px 0; width:100%; }
  .btn-nav{ margin-top:8px; text-align:center; }
  .nav-toggle{ display:flex; }
  .cards-grid{ grid-template-columns:1fr; }
  .advantages-grid{ grid-template-columns:1fr; }
  .steps{ flex-direction:column; align-items:stretch; }
  .step-arrow{ transform:rotate(90deg); padding:0; }
  .section{ padding:76px 0; }
  .hero{ padding:150px 0 80px; }
}

.nav-toggle.active span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2){ opacity:0; }
.nav-toggle.active span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }