/* ═══════════════ TOKENS ═══════════════ */
:root{
  --ink:#1a1a2e;
  --navy-deep:#16213e;
  --navy:#0f3460;
  --coral:#e94560;
  --coral-deep:#c62a47;
  --paper:#fdfbf6;
  --paper-dim:#f5f1e8;
  --slate:#5b6478;
  --slate-light:#8a92a3;
  --line:#e8e3d8;
  --success:#1f7a4d;
  --success-bg:#e7f4ec;

  --font-display:'Space Grotesk', sans-serif;
  --font-body:'Inter', sans-serif;
  --font-mono:'JetBrains Mono', monospace;

  --max-w:1180px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  line-height:1.5;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:0.01ms !important; animation-iteration-count:1 !important; transition-duration:0.01ms !important; scroll-behavior:auto !important;}
}

/* ═══════════════ NAV ═══════════════ */
.site-nav{
  position:sticky; top:0; z-index:100;
  background:rgba(253,251,246,0.88);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  max-width:var(--max-w); margin:0 auto;
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 24px;
}
.nav-brand{display:flex; align-items:center; gap:10px; font-family:var(--font-display); font-weight:600; font-size:17px; letter-spacing:-.01em}
.nav-logo{width:30px; height:30px; border-radius:8px}
.nav-links{display:flex; gap:32px}
.nav-links a{font-size:14px; font-weight:500; color:var(--slate); transition:color .15s}
.nav-links a:hover{color:var(--ink)}
.nav-cta{
  background:var(--ink); color:#fff; font-size:13px; font-weight:600;
  padding:9px 18px; border-radius:100px; transition:background .15s;
}
.nav-cta:hover{background:var(--coral)}

@media (max-width:760px){
  .nav-links{display:none}
}

/* ═══════════════ HERO ═══════════════ */
.hero{
  max-width:var(--max-w); margin:0 auto;
  padding:76px 24px 60px;
}
.hero-inner{
  display:grid; grid-template-columns:1.05fr 0.95fr; gap:56px; align-items:center;
}
.eyebrow{
  font-family:var(--font-mono); font-size:12px; font-weight:500;
  color:var(--coral-deep); text-transform:uppercase; letter-spacing:.12em;
  margin-bottom:16px;
}
.hero-copy h1{
  font-family:var(--font-display); font-size:52px; line-height:1.06;
  font-weight:600; letter-spacing:-.02em; color:var(--ink); margin-bottom:22px;
}
.hero-sub{
  font-size:17px; color:var(--slate); max-width:480px; margin-bottom:32px; line-height:1.6;
}
.hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-bottom:14px}
.hero-note{font-size:13px; color:var(--slate-light)}

.btn-download{
  display:flex; align-items:center; gap:10px;
  padding:13px 20px; border-radius:14px;
  border:1.5px solid transparent; cursor:pointer;
  font-family:var(--font-body); transition:all .15s;
}
.btn-download.primary{background:var(--ink); color:#fff}
.btn-download.primary:hover{background:var(--coral); transform:translateY(-1px)}
.btn-download.secondary{background:transparent; border-color:var(--line); color:var(--ink)}
.btn-download.secondary:hover{border-color:var(--ink)}
.btn-download strong{display:block; font-size:14.5px; font-weight:600}
.btn-download small{display:block; font-size:11.5px; opacity:.7; margin-top:1px}
.btn-download.full{width:100%; justify-content:center; flex-direction:column; align-items:center; gap:2px; padding:16px}
.os-icon{width:22px; height:22px; flex-shrink:0}

/* ── Hero visual: ledger stack ── */
.hero-visual{position:relative; display:flex; justify-content:center; padding:20px 0}
.ledger-stack{position:relative; width:340px; height:430px}
.ledger-sheet{
  position:absolute; inset:0; background:#fff;
  border-radius:18px; border:1px solid var(--line);
  box-shadow:0 30px 60px -20px rgba(26,26,46,.18);
}
.sheet-back{ transform:rotate(7deg) translate(10px, 6px); background:var(--paper-dim); }
.sheet-mid{ transform:rotate(-4deg) translate(-6px, 2px); background:#fff; }

.invoice-card{
  position:relative; width:100%; height:100%;
  background:#fff; border-radius:18px; border:1px solid var(--line);
  box-shadow:0 30px 70px -18px rgba(26,26,46,.28);
  padding:26px 24px; display:flex; flex-direction:column; gap:18px;
  overflow:hidden;
}
.ic-head{display:flex; justify-content:space-between; align-items:flex-start}
.ic-brand{display:flex; align-items:center; gap:10px}
.ic-logo{width:30px; height:30px; border-radius:8px; background:linear-gradient(135deg,var(--coral),var(--coral-deep))}
.ic-bizname{font-family:var(--font-display); font-weight:600; font-size:13.5px}
.ic-bizline{font-size:10.5px; color:var(--slate-light)}
.ic-title{text-align:right}
.ic-invoice-word{font-family:var(--font-mono); font-size:10px; letter-spacing:.12em; color:var(--slate-light)}
.ic-num{font-family:var(--font-mono); font-size:12px; font-weight:600; color:var(--ink)}

.ic-rows{display:flex; flex-direction:column; gap:9px; border-top:1px solid var(--line); border-bottom:1px solid var(--line); padding:14px 0}
.ic-row{display:flex; justify-content:space-between; font-size:12.5px; color:var(--slate)}
.ic-amt{font-family:var(--font-mono); font-weight:500; color:var(--ink); transition:opacity .3s}

.ic-total-wrap{position:relative}
.ic-total-row{display:flex; justify-content:space-between; align-items:baseline}
.ic-total-row span:first-child{font-size:13px; color:var(--slate); font-weight:500}
.ic-total-amt{font-family:var(--font-mono); font-size:20px; font-weight:700; color:var(--coral-deep)}

.ic-stamp{
  position:absolute; top:-58px; right:-2px;
  font-family:var(--font-display); font-weight:700; font-size:24px;
  color:var(--success); border:2.5px solid var(--success);
  padding:2px 10px; border-radius:7px;
  transform:rotate(-14deg) scale(0);
  opacity:0;
  letter-spacing:.06em;
  transition:transform .5s cubic-bezier(.34,1.56,.64,1), opacity .3s;
  pointer-events:none;
  white-space:nowrap;
  background:#fff;
}
.ic-stamp.show{transform:rotate(-14deg) scale(1); opacity:.88}

@media (max-width:900px){
  .hero-inner{grid-template-columns:1fr; gap:48px}
  .hero-copy h1{font-size:40px}
  .hero-visual{order:-1}
  .ledger-stack{width:280px; height:360px}
}
@media (max-width:480px){
  .hero{padding:48px 18px 40px}
  .hero-copy h1{font-size:32px}
  .btn-download{width:100%}
  .hero-actions{flex-direction:column}
  .ledger-stack{width:240px; height:310px}
  .invoice-card{padding:20px 18px; gap:14px}
  .ic-stamp{font-size:18px; padding:1px 8px; top:-44px; right:-2px}
}

/* ═══════════════ TRUST STRIP ═══════════════ */
.trust-strip{background:var(--ink); padding:28px 24px}
.trust-inner{
  max-width:var(--max-w); margin:0 auto;
  display:grid; grid-template-columns:repeat(4,1fr); gap:20px; text-align:center;
}
.trust-item{display:flex; flex-direction:column; gap:4px}
.trust-num{font-family:var(--font-display); font-size:28px; font-weight:700; color:#fff}
.trust-item span:last-child{font-size:12px; color:rgba(255,255,255,.55); font-weight:500}
@media (max-width:600px){
  .trust-inner{grid-template-columns:repeat(2,1fr); gap:24px}
}

/* ═══════════════ SECTION HEAD (shared) ═══════════════ */
.section-head{max-width:var(--max-w); margin:0 auto; padding:88px 24px 0; text-align:left}
.section-head h2{
  font-family:var(--font-display); font-size:34px; font-weight:600;
  letter-spacing:-.015em; color:var(--ink); max-width:600px; line-height:1.2;
}
@media (max-width:600px){
  .section-head{padding:60px 20px 0}
  .section-head h2{font-size:26px}
}

/* ═══════════════ HOW IT WORKS ═══════════════ */
.how{padding-bottom:40px}
.how-grid{max-width:var(--max-w); margin:0 auto; padding:48px 24px 0; display:flex; flex-direction:column; gap:90px}
.how-step{display:grid; grid-template-columns:1.1fr 0.9fr; gap:56px; align-items:center}
.how-step.reverse{grid-template-columns:0.9fr 1.1fr}
.how-step.reverse .how-frame{order:2}
.how-step.reverse .how-text{order:1}

.how-frame{
  background:var(--paper-dim); border-radius:20px; border:1px solid var(--line);
  padding:18px; box-shadow:0 24px 50px -24px rgba(26,26,46,.15);
}
.how-frame img{border-radius:10px; width:100%}

.how-tag{font-family:var(--font-mono); font-size:11.5px; font-weight:600; color:var(--coral-deep); letter-spacing:.08em}
.how-text h3{font-family:var(--font-display); font-size:24px; font-weight:600; margin:10px 0 12px; color:var(--ink)}
.how-text p{font-size:15px; color:var(--slate); line-height:1.65; max-width:420px}

@media (max-width:860px){
  .how-step, .how-step.reverse{grid-template-columns:1fr; gap:28px}
  .how-step.reverse .how-frame{order:1}
  .how-step.reverse .how-text{order:2}
  .how-grid{gap:56px}
}

/* ═══════════════ FEATURES ═══════════════ */
.features{padding-bottom:40px}
.feature-grid{
  max-width:var(--max-w); margin:0 auto; padding:48px 24px 0;
  display:grid; grid-template-columns:repeat(3,1fr); gap:1px;
  background:var(--line); border:1px solid var(--line); border-radius:20px; overflow:hidden;
}
.feature-card{background:var(--paper); padding:32px 28px}
.feature-icon{font-size:26px; margin-bottom:14px}
.feature-card h3{font-family:var(--font-display); font-size:17px; font-weight:600; margin-bottom:8px; color:var(--ink)}
.feature-card p{font-size:13.5px; color:var(--slate); line-height:1.6}

@media (max-width:860px){
  .feature-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:560px){
  .feature-grid{grid-template-columns:1fr}
}

/* ═══════════════ DOWNLOAD ═══════════════ */
.download{background:var(--ink); padding:100px 24px; margin-top:60px}
.download-inner{max-width:var(--max-w); margin:0 auto; text-align:center}
.download .eyebrow{color:var(--coral); text-align:center}
.download h2{
  font-family:var(--font-display); font-size:38px; font-weight:600;
  color:#fff; letter-spacing:-.015em; margin-bottom:14px;
}
.download-sub{color:rgba(255,255,255,.6); max-width:520px; margin:0 auto 48px; font-size:15px; line-height:1.6}

.download-cards{display:grid; grid-template-columns:repeat(2,1fr); gap:20px; max-width:620px; margin:0 auto}
.download-card{
  background:rgba(255,255,255,.04); border:1px solid rgba(255,255,255,.12);
  border-radius:18px; padding:32px 24px; text-align:center;
}
.dl-icon{color:#fff; display:flex; justify-content:center; margin-bottom:16px}
.download-card h3{font-family:var(--font-display); font-size:19px; font-weight:600; color:#fff; margin-bottom:6px}
.download-card p{font-size:12.5px; color:rgba(255,255,255,.55); margin-bottom:22px; min-height:32px}

.download-footnote{
  max-width:560px; margin:40px auto 0; font-size:12.5px;
  color:rgba(255,255,255,.45); line-height:1.7;
}
.download-footnote em{color:rgba(255,255,255,.7); font-style:normal; font-weight:500}

@media (max-width:560px){
  .download-cards{grid-template-columns:1fr}
  .download{padding:70px 20px}
}

/* ═══════════════ FAQ ═══════════════ */
.faq{padding-bottom:100px}
.faq-list{max-width:760px; margin:0 auto; padding:48px 24px 0}
.faq-item{
  border-bottom:1px solid var(--line); padding:22px 0;
}
.faq-item summary{
  font-family:var(--font-display); font-size:16.5px; font-weight:500;
  cursor:pointer; list-style:none; position:relative; padding-right:30px;
  color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:'+'; position:absolute; right:0; top:0;
  font-size:20px; color:var(--slate-light); transition:transform .2s;
}
.faq-item[open] summary::after{ content:'–'; }
.faq-body{font-size:14.5px; color:var(--slate); line-height:1.7; margin-top:14px; max-width:640px}
.faq-body a{color:var(--coral-deep); font-weight:500; text-decoration:underline}

/* ═══════════════ FOOTER ═══════════════ */
.site-footer{border-top:1px solid var(--line); padding:56px 24px 40px}
.footer-inner{max-width:var(--max-w); margin:0 auto; text-align:center}
.footer-brand{display:flex; align-items:center; justify-content:center; gap:10px; font-family:var(--font-display); font-weight:600; font-size:16px; margin-bottom:14px}
.footer-tag{font-size:13.5px; color:var(--slate); max-width:380px; margin:0 auto 26px; line-height:1.6}
.footer-links{display:flex; justify-content:center; gap:28px; margin-bottom:26px}
.footer-links a{font-size:13px; color:var(--slate); font-weight:500}
.footer-links a:hover{color:var(--ink)}
.footer-copy{font-size:12px; color:var(--slate-light)}