/* =========================================================
   VatFlow — Design System v2.1
   Inter + JetBrains Mono · Deep Blue #1B2B4B
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --ink:      #111111;
  --paper:    #f7f5f0;
  --paper-2:  #eeecea;
  --line:     #dddbd6;
  --muted:    #6a6a6a;
  --accent:   #1B2B4B;
  --accent-h: #263d6b;
  --white:    #ffffff;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  --section-pad: 6rem 3rem;
  --max-w: 1100px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }

/* ── Nav ─────────────────────────────────────────────── */
nav {
  position: sticky; top: 0; z-index: 100;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  padding: 0 3rem;
  display: flex; align-items: center; justify-content: space-between;
  height: 56px;
}
.nav-logo {
  display: flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-mono); font-size: 0.78rem;
  letter-spacing: 0.06em; font-weight: 500;
}
.nav-logo .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 2rem; list-style: none; }
.nav-links a {
  font-family: var(--font-mono); font-size: 0.63rem;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted); transition: color 0.15s;
}
.nav-links a:hover { color: var(--ink); }
.nav-right { display: flex; align-items: center; gap: 1.25rem; }
.nav-lang { display: flex; align-items: center; gap: 0.5rem; }
.nav-lang a {
  font-family: var(--font-mono); font-size: 0.6rem;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted); transition: color 0.15s;
}
.nav-lang a:hover, .nav-lang a.active { color: var(--ink); }
.nav-lang .sep { color: var(--line); }
.btn-nav {
  display: inline-flex; align-items: center; gap: 0.35rem;
  background: var(--accent); color: #fff;
  padding: 0.45rem 1rem;
  font-family: var(--font-mono); font-size: 0.63rem;
  letter-spacing: 0.08em; text-transform: uppercase;
  transition: background 0.15s;
}
.btn-nav:hover { background: var(--accent-h); }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 4px; }
.hamburger span { display: block; width: 20px; height: 1px; background: var(--ink); transition: all 0.2s; }

/* ── Hero ────────────────────────────────────────────── */
#hero {
  padding: 7rem 3rem 6rem;
  max-width: var(--max-w); margin: 0 auto;
  border-bottom: 1px solid var(--line);
}
.hero-label {
  font-family: var(--font-mono); font-size: 0.63rem;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 2.5rem;
  display: flex; align-items: center; gap: 0.75rem;
}
.hero-label::before { content: ''; display: block; width: 20px; height: 1px; background: var(--accent); }
.hero-h1 {
  font-family: var(--font-body); font-weight: 300;
  font-size: clamp(2.25rem, 5vw, 4.5rem);
  line-height: 1.1; letter-spacing: -0.03em;
  max-width: 18ch; margin-bottom: 1.75rem;
}
.hero-h1 strong { font-weight: 500; color: var(--accent); }
.hero-sub {
  font-size: 0.95rem; line-height: 1.75;
  max-width: 52ch; color: var(--muted); margin-bottom: 3rem;
}
.hero-bottom { display: flex; align-items: center; gap: 2.5rem; flex-wrap: wrap; }
.hero-pricing { display: flex; align-items: center; gap: 2rem; }
.hero-price { display: flex; flex-direction: column; gap: 0.1rem; }
.hero-price-label { font-family: var(--font-mono); font-size: 0.58rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
.hero-price-val { font-family: var(--font-mono); font-size: 0.82rem; font-weight: 500; color: var(--ink); }
.hero-price-sep { width: 1px; height: 28px; background: var(--line); }

/* ── Buttons ─────────────────────────────────────────── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 0.4rem;
  background: var(--accent); color: #fff;
  padding: 0.72rem 1.4rem;
  font-family: var(--font-mono); font-size: 0.68rem;
  letter-spacing: 0.08em; text-transform: uppercase;
  transition: background 0.15s; white-space: nowrap;
}
.btn-primary:hover { background: var(--accent-h); }
.btn-ghost {
  display: inline-flex; align-items: center; gap: 0.4rem;
  color: var(--muted);
  font-family: var(--font-mono); font-size: 0.68rem;
  letter-spacing: 0.08em; text-transform: uppercase;
  border-bottom: 1px solid var(--line); padding-bottom: 2px;
  transition: color 0.15s, border-color 0.15s; white-space: nowrap;
}
.btn-ghost:hover { color: var(--ink); border-color: var(--ink); }

/* ── Ticker ──────────────────────────────────────────── */
.ticker {
  background: #1B2B4B;
  overflow: hidden;
  padding: 0.55rem 0;
  width: 100%;
}
.ticker-track {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  white-space: nowrap;
  width: max-content;
  animation: ticker-scroll 40s linear infinite;
}
.ticker-track:hover { animation-play-state: paused; }
@keyframes ticker-scroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.ticker-item {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  gap: 1rem;
  padding: 0 2rem;
  font-family: var(--font-mono); font-size: 0.62rem;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: rgba(255,255,255,0.6); white-space: nowrap;
}
.ticker-item strong { color: #fff; font-weight: 500; }
.ticker-sep { width: 3px; height: 3px; border-radius: 50%; background: rgba(255,255,255,0.25); flex-shrink: 0; }

/* ── Section base ────────────────────────────────────── */
.section-wrap { border-top: 1px solid var(--line); padding: var(--section-pad); background: var(--paper); }
.section-wrap:nth-child(even) { background: var(--white); }
.inner { max-width: var(--max-w); margin: 0 auto; }
.section-meta { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 3rem; }
.section-num { font-family: var(--font-mono); font-size: 0.58rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); font-weight: 500; }
.section-title-label { font-family: var(--font-mono); font-size: 0.58rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
.section-sep { flex: 1; height: 1px; background: var(--line); }
.section-header {
  font-family: var(--font-body); font-weight: 300;
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  line-height: 1.25; letter-spacing: -0.02em;
  max-width: 34ch; margin-bottom: 3rem;
}

/* ── 01 Obligation ───────────────────────────────────── */
.obligation-grid { display: grid; grid-template-columns: 1fr 300px; gap: 5rem; align-items: start; }
.obligation-text p { font-size: 0.92rem; line-height: 1.85; color: var(--muted); margin-bottom: 1.25rem; }
.obligation-text p strong { color: var(--ink); font-weight: 500; }
.threshold-card {
  border: 1px solid var(--line);
  padding: 2rem; position: sticky; top: 72px;
  background: var(--white);
}
.threshold-label { font-family: var(--font-mono); font-size: 0.58rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.75rem; display: block; }
.threshold-amount { font-family: var(--font-mono); font-weight: 500; font-size: clamp(2.25rem, 4vw, 3.5rem); letter-spacing: -0.03em; line-height: 1; color: var(--accent); margin-bottom: 0.75rem; }
.threshold-desc { font-size: 0.8rem; line-height: 1.7; color: var(--muted); border-top: 1px solid var(--line); padding-top: 1rem; margin-top: 1rem; }

/* ── 02 Services ─────────────────────────────────────── */
.services-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--line);
  background: var(--white);
}
.service-card {
  padding: 2.25rem 2rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--white);
  transition: background 0.15s;
}
.service-card:nth-child(2n) { border-right: none; }
.service-card:nth-child(3),
.service-card:nth-child(4) { border-bottom: none; }
.service-card:hover { background: var(--paper); }
.service-num {
  font-family: var(--font-mono); font-size: 0.58rem;
  letter-spacing: 0.1em; color: var(--accent);
  margin-bottom: 1rem; font-weight: 500;
  display: block;
}
.service-title {
  font-family: var(--font-body); font-weight: 500;
  font-size: 0.92rem; margin-bottom: 0.65rem; color: var(--ink);
}
.service-desc { font-size: 0.85rem; line-height: 1.7; color: var(--muted); }

/* ── 03 Process ──────────────────────────────────────── */
.process-table { border: 1px solid var(--line); width: 100%; background: var(--white); }
.process-row {
  display: grid;
  grid-template-columns: 52px 190px 1fr 120px;
  align-items: start;
  border-bottom: 1px solid var(--line);
  transition: background 0.15s;
}
.process-row:last-child { border-bottom: none; }
.process-row:hover { background: var(--paper); }
.process-row > * {
  padding: 1.5rem 1.5rem;
  border-right: 1px solid var(--line);
}
.process-row > *:last-child { border-right: none; }
.process-step-num {
  font-family: var(--font-mono); font-size: 0.65rem;
  font-weight: 500; color: var(--accent);
  padding-top: 1.65rem;
}
.process-step-name {
  font-family: var(--font-mono); font-size: 0.72rem;
  font-weight: 500; color: var(--ink);
  line-height: 1.4;
}
.process-step-desc { font-size: 0.85rem; line-height: 1.7; color: var(--muted); }
.process-step-time {
  font-family: var(--font-mono); font-size: 0.6rem;
  letter-spacing: 0.06em; color: var(--muted);
  text-transform: uppercase; padding-top: 1.65rem;
}

/* ── Required docs ───────────────────────────────────── */
.section-sub {
  font-family: var(--font-mono); font-size: 0.6rem;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--muted); margin: 2.5rem 0 1rem;
}
.docs-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line); background: var(--white);
}
.doc-item {
  padding: 1rem 1.25rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: 0.82rem; color: var(--muted);
  display: flex; align-items: flex-start; gap: 0.5rem;
}
.doc-item:nth-child(3n) { border-right: none; }
.doc-item:nth-last-child(-n+3) { border-bottom: none; }
.doc-marker { font-family: var(--font-mono); font-size: 0.58rem; color: var(--accent); font-weight: 500; flex-shrink: 0; margin-top: 0.15em; }

/* ── 04 Pricing ──────────────────────────────────────── */
.pricing-note {
  font-family: var(--font-mono); font-size: 0.65rem;
  letter-spacing: 0.05em; color: var(--muted);
  margin-bottom: 2.5rem; line-height: 1.75; max-width: 60ch;
}
.pricing-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  border: 1px solid var(--line);
}
.pricing-card { padding: 2.5rem; border-right: 1px solid var(--line); background: var(--white); }
.pricing-card:last-child { border-right: none; }
.pricing-card.featured { background: var(--accent); color: #fff; }
.pricing-tag {
  font-family: var(--font-mono); font-size: 0.58rem;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 1.5rem; display: block;
}
.pricing-card.featured .pricing-tag { color: rgba(255,255,255,0.45); }
.pricing-name { font-family: var(--font-body); font-weight: 500; font-size: 0.95rem; margin-bottom: 0.3rem; }
.pricing-card.featured .pricing-name { color: #fff; }
.pricing-amount {
  font-family: var(--font-mono); font-weight: 500;
  font-size: clamp(1.75rem, 3vw, 2.75rem);
  letter-spacing: -0.03em; line-height: 1;
  margin: 1.1rem 0 0.3rem;
}
.pricing-card.featured .pricing-amount { color: #fff; }
.pricing-unit {
  font-family: var(--font-mono); font-size: 0.6rem;
  letter-spacing: 0.06em; color: var(--muted);
  margin-bottom: 1.5rem; text-transform: uppercase;
}
.pricing-card.featured .pricing-unit { color: rgba(255,255,255,0.45); }
.pricing-divider { height: 1px; background: var(--line); margin: 1.5rem 0; }
.pricing-card.featured .pricing-divider { background: rgba(255,255,255,0.12); }
.pricing-features { list-style: none; display: flex; flex-direction: column; gap: 0.6rem; }
.pricing-features li {
  display: flex; align-items: flex-start; gap: 0.55rem;
  font-size: 0.82rem; line-height: 1.55; color: var(--muted);
}
.pricing-card.featured .pricing-features li { color: rgba(255,255,255,0.65); }
.pricing-features li::before {
  content: '→'; font-family: var(--font-mono); font-size: 0.62rem;
  color: var(--accent); flex-shrink: 0; margin-top: 0.1em;
}
.pricing-card.featured .pricing-features li::before { color: rgba(255,255,255,0.35); }
.pricing-cta {
  display: inline-flex; align-items: center; gap: 0.35rem;
  margin-top: 2rem; font-family: var(--font-mono); font-size: 0.62rem;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted); border-bottom: 1px solid var(--line);
  padding-bottom: 2px; transition: color 0.15s, border-color 0.15s;
}
.pricing-cta:hover { color: var(--ink); border-color: var(--ink); }
.pricing-card.featured .pricing-cta { color: rgba(255,255,255,0.55); border-color: rgba(255,255,255,0.18); }
.pricing-card.featured .pricing-cta:hover { color: #fff; border-color: rgba(255,255,255,0.55); }

/* Pricing options (TDFN / Taux effectif) */
.pricing-options { display: flex; flex-direction: column; gap: 0; margin: 1.25rem 0; }
.pricing-option {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  gap: 1rem;
}
.pricing-option:first-child { border-top: 1px solid rgba(255,255,255,0.1); }
.pricing-option-label { font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.06em; text-transform: uppercase; color: rgba(255,255,255,0.55); }
.pricing-option-label small { display: block; font-size: 0.55rem; letter-spacing: 0.05em; color: rgba(255,255,255,0.35); margin-top: 0.15rem; }
.pricing-option-val { font-family: var(--font-mono); font-weight: 500; font-size: 1.1rem; color: #fff; white-space: nowrap; letter-spacing: -0.01em; }
.pricing-option-val small { font-size: 0.62rem; font-weight: 400; color: rgba(255,255,255,0.45); margin-left: 0.3rem; }

/* ── FAQ ─────────────────────────────────────────────── */
.faq-list { border-top: 1px solid var(--line); max-width: 720px; }
details.faq-item { border-bottom: 1px solid var(--line); }
details.faq-item summary {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.3rem 0; cursor: pointer; list-style: none;
  font-size: 0.9rem; font-weight: 400; transition: color 0.15s; gap: 1rem;
}
details.faq-item summary::-webkit-details-marker { display: none; }
details.faq-item summary:hover { color: var(--accent); }
.faq-icon { font-family: var(--font-mono); font-size: 0.9rem; color: var(--muted); flex-shrink: 0; transition: transform 0.25s cubic-bezier(0.16,1,0.3,1), color 0.15s; }
details[open] .faq-icon { transform: rotate(45deg); color: var(--accent); }
.faq-answer { font-size: 0.87rem; line-height: 1.8; color: var(--muted); padding-bottom: 1.3rem; max-width: 60ch; }
.faq-answer strong { color: var(--ink); font-weight: 500; }

/* ── Final CTA ───────────────────────────────────────── */
.cta-final-wrap { background: var(--accent); padding: 5rem 3rem; text-align: center; }
.cta-final-inner { max-width: var(--max-w); margin: 0 auto; display: flex; flex-direction: column; align-items: center; gap: 1.5rem; }
.cta-final-label { font-family: var(--font-mono); font-size: 0.6rem; letter-spacing: 0.12em; text-transform: uppercase; color: rgba(255,255,255,0.45); }
.cta-final-heading { font-family: var(--font-body); font-weight: 300; font-size: clamp(1.4rem, 3vw, 2.25rem); letter-spacing: -0.02em; color: #fff; line-height: 1.25; }
.btn-white { display: inline-flex; align-items: center; gap: 0.4rem; background: #fff; color: var(--accent); padding: 0.72rem 1.4rem; font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; transition: background 0.15s; }
.btn-white:hover { background: var(--paper); }

/* ── Footer ──────────────────────────────────────────── */
footer { background: var(--ink); color: rgba(255,255,255,0.4); }
.footer-main { max-width: var(--max-w); margin: 0 auto; padding: 4rem 3rem 3.5rem; display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 2.5rem; border-top: 1px solid rgba(255,255,255,0.06); }
.footer-logo { display: flex; align-items: center; gap: 0.5rem; color: #fff; font-family: var(--font-mono); font-size: 0.72rem; margin-bottom: 0.7rem; font-weight: 500; }
.footer-logo .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.footer-tagline { font-size: 0.78rem; line-height: 1.65; color: rgba(255,255,255,0.28); max-width: 22ch; }
.footer-col h4 { font-family: var(--font-mono); font-size: 0.56rem; letter-spacing: 0.12em; text-transform: uppercase; color: rgba(255,255,255,0.18); margin-bottom: 0.9rem; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }
.footer-col ul li a { font-size: 0.78rem; color: rgba(255,255,255,0.38); transition: color 0.15s; }
.footer-col ul li a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); max-width: var(--max-w); margin: 0 auto; padding: 1.2rem 3rem; display: flex; align-items: center; justify-content: space-between; }
.footer-bottom p { font-family: var(--font-mono); font-size: 0.58rem; letter-spacing: 0.08em; color: rgba(255,255,255,0.18); }

/* ── Reveal ──────────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(12px); transition: opacity 0.45s ease, transform 0.45s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 1024px) {
  .obligation-grid { grid-template-columns: 1fr; }
  .threshold-card { position: static; }
  .process-row { grid-template-columns: 40px 150px 1fr; }
  .process-step-time { display: none; }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .docs-grid { grid-template-columns: 1fr 1fr; }
  .doc-item:nth-child(3n) { border-right: 1px solid var(--line); }
  .doc-item:nth-child(2n) { border-right: none; }
}
@media (max-width: 768px) {
  :root { --section-pad: 3.5rem 1.5rem; }
  nav { padding: 0 1.5rem; }
  .nav-links { display: none; position: fixed; inset: 56px 0 0 0; background: var(--paper); flex-direction: column; gap: 0; padding: 1.5rem; border-top: 1px solid var(--line); z-index: 99; }
  .nav-links.open { display: flex; }
  .nav-links li { border-bottom: 1px solid var(--line); }
  .nav-links a { display: block; padding: 0.85rem 0; }
  .hamburger { display: flex; }
  .btn-nav { display: none; }
  #hero { padding: 4rem 1.5rem 3.5rem; }
  .services-grid { grid-template-columns: 1fr; }
  .service-card { border-right: none; }
  .service-card:nth-child(3) { border-bottom: 1px solid var(--line); }
  .service-card:nth-child(4) { border-bottom: none; }
  .process-row { grid-template-columns: 36px 1fr; }
  .process-step-name { display: none; }
  .pricing-grid { grid-template-columns: 1fr; }
  .pricing-card { border-right: none; border-bottom: 1px solid var(--line); }
  .pricing-card:last-child { border-bottom: none; }
  .footer-main { grid-template-columns: 1fr; padding: 3rem 1.5rem; }
  .footer-bottom { flex-direction: column; gap: 0.5rem; padding: 1.2rem 1.5rem; }
  .hero-bottom { flex-direction: column; align-items: flex-start; gap: 1.5rem; }
  .hero-pricing { flex-wrap: wrap; gap: 1.25rem; }
  .docs-grid { grid-template-columns: 1fr; }
  .doc-item { border-right: none !important; }
  .doc-item:last-child { border-bottom: none !important; }
  .cta-final-wrap { padding: 4rem 1.5rem; }
  .pricing-option { flex-direction: column; align-items: flex-start; gap: 0.35rem; }
}