:root {
  --bg: #f7f9fc;
  --surface: #ffffff;
  --text: #162033;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --accent: #0f172a;
  --border: #e2e8f0;
  --shadow: 0 20px 50px rgba(15, 23, 42, 0.10);
  --radius: 8px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.34);
  outline-offset: 3px;
}
.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.navbar { display: flex; align-items: center; justify-content: space-between; min-height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.1rem; }
.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: #fff;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.25);
}
.nav-links { display: flex; align-items: center; gap: 20px; list-style: none; margin: 0; padding: 0; color: var(--muted); font-weight: 650; }
.nav-links a:hover { color: var(--primary); }
.nav-cta { padding: 10px 16px; border: 1px solid var(--border); border-radius: 999px; background: #fff; color: var(--text) !important; }
.nav-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--border); border-radius: 12px; background: #fff; font-size: 1.35rem; cursor: pointer; }

.hero { padding: 44px 0 42px; background: radial-gradient(circle at top left, #dbeafe, transparent 34%), radial-gradient(circle at top right, #ede9fe, transparent 30%); }
.hero-grid { display: grid; grid-template-columns: 1fr 0.9fr; gap: 36px; align-items: center; }
.eyebrow { color: var(--primary); font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; font-size: 0.76rem; margin: 0 0 10px; }
h1, h2, h3 { line-height: 1.15; margin-top: 0; }
h1 { font-size: 3.25rem; letter-spacing: 0; margin-bottom: 14px; }
h2 { font-size: 2.15rem; letter-spacing: 0; margin-bottom: 10px; }
h3 { font-size: 1.25rem; margin-bottom: 10px; }
.hero-text, .section-heading p, .feature-grid p, .cta-card p, .app-body p, .detail-intro p { color: var(--muted); font-size: 1rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 20px 0; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 42px; padding: 10px 18px; border-radius: 999px; font-weight: 800; transition: 0.2s ease; border: 1px solid transparent; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 14px 30px rgba(37, 99, 235, 0.26); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-secondary { background: #fff; border-color: var(--border); color: var(--text); }
.btn-link { color: var(--primary); padding-left: 0; padding-right: 0; }
.hero-stats { display: flex; gap: 10px; flex-wrap: wrap; }
.hero-stats div { padding: 10px 14px; background: rgba(255,255,255,0.72); border: 1px solid var(--border); border-radius: 8px; }
.hero-stats strong { display: block; font-size: 1.15rem; }
.hero-stats span { color: var(--muted); font-size: 0.84rem; }
.hero-visual { min-height: 310px; position: relative; }
.phone-card { position: absolute; width: 152px; min-height: 178px; border-radius: 12px; background: rgba(255,255,255,0.9); border: 1px solid var(--border); box-shadow: var(--shadow); display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 10px; font-weight: 900; cursor: pointer; }
.phone-card img { width: 92px; height: 92px; border-radius: 18px; object-fit: cover; box-shadow: 0 12px 24px rgba(15, 23, 42, 0.16); }
.phone-card span { font-size: 0.94rem; color: var(--muted); }
.phone-card:hover, .phone-card:focus-visible { border-color: rgba(37, 99, 235, 0.45); box-shadow: 0 20px 46px rgba(37, 99, 235, 0.18); }
.phone-card-one { top: 0; left: 30px; transform: rotate(-7deg); }
.phone-card-two { top: 42px; right: 30px; transform: rotate(7deg); }
.phone-card-three { bottom: 0; left: 170px; transform: rotate(-1deg); }

.section { padding: 52px 0; }
.section-heading { text-align: center; max-width: 720px; margin: 0 auto 26px; }
.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.app-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; box-shadow: 0 12px 30px rgba(15,23,42,0.06); display: flex; flex-direction: column; gap: 14px; }
.app-card:hover { transform: translateY(-4px); transition: 0.2s ease; box-shadow: var(--shadow); }
.app-icon { width: 72px; height: 72px; border-radius: 18px; display: grid; place-items: center; color: #fff; font-weight: 900; }
.app-logo {
  object-fit: cover;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.14);
}
.pdf-icon { background: linear-gradient(135deg, #ef4444, #f97316); }
.invoice-icon { background: linear-gradient(135deg, #16a34a, #14b8a6); }
.converter-icon { background: linear-gradient(135deg, #2563eb, #7c3aed); }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.tag-list span { background: #f1f5f9; color: #475569; padding: 5px 9px; border-radius: 999px; font-size: 0.8rem; font-weight: 700; }
.card-actions { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: auto; }

.feature-band { background: #0f172a; color: #fff; }
.feature-band p { color: #cbd5e1; }
.feature-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 32px; align-items: center; }
.feature-list { display: grid; gap: 12px; }
.feature-item { display: flex; gap: 14px; padding: 16px; background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.12); border-radius: 8px; }
.feature-item span { font-size: 1.8rem; }
.feature-item h3 { margin-bottom: 4px; }

.cta-card { text-align: center; background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 34px 24px; box-shadow: var(--shadow); }
.site-footer { background: #fff; border-top: 1px solid var(--border); padding: 20px 0 14px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr auto 1fr; gap: 28px; align-items: center; }
.footer-grid h4 { margin: 0 0 8px; }
.footer-grid a { color: var(--muted); }
.footer-grid a:hover { color: var(--primary); }
.footer-grid .brand { color: var(--text); margin-bottom: 6px; }
.footer-grid .brand-mark { width: 34px; height: 34px; border-radius: 10px; }
.footer-grid p, .copyright { color: var(--muted); }
.footer-brand p { margin: 0; }
.footer-links { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.footer-links h4 { flex-basis: 100%; }
.footer-domain { justify-self: end; }
.copyright { text-align: center; border-top: 1px solid var(--border); margin: 16px auto 0; padding-top: 12px; }

.page-hero { padding: 44px 0 28px; background: linear-gradient(135deg, #eff6ff, #faf5ff); }
.detail-hero { padding: 48px 0; }
.detail-grid { display: grid; grid-template-columns: 0.95fr 1.05fr; gap: 32px; align-items: center; }
.detail-icon { width: 110px; height: 110px; border-radius: 24px; display: grid; place-items: center; color: #fff; font-size: 1.8rem; font-weight: 900; margin-bottom: 20px; }
.screenshot-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.screenshot-placeholder { min-height: 330px; border-radius: 12px; background: #fff; border: 1px solid var(--border); box-shadow: var(--shadow); padding: 18px; display: flex; flex-direction: column; justify-content: space-between; }
.screen-top { height: 16px; width: 72px; border-radius: 999px; background: #e2e8f0; margin: 0 auto; }
.screen-content { display: grid; gap: 12px; }
.screen-line { height: 16px; background: #e2e8f0; border-radius: 999px; }
.screen-box { height: 86px; background: linear-gradient(135deg, #dbeafe, #ede9fe); border-radius: 22px; }
.check-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; padding: 0; list-style: none; }
.check-list li { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; font-weight: 700; }
.check-list li::before { content: "✓"; color: var(--primary); margin-right: 10px; }
.review-grid, .faq-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.review-card, .faq-card, .contact-card { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 18px; box-shadow: 0 10px 26px rgba(15,23,42,0.05); }
.feature-band .review-card {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.14);
  color: #fff;
}
.feature-band .review-card p { color: #e2e8f0; }
.contact-layout { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 24px; }
.contact-form { display: grid; gap: 14px; }
.contact-form input, .contact-form textarea { width: 100%; padding: 14px 16px; border-radius: 14px; border: 1px solid var(--border); font: inherit; }
.contact-form textarea { min-height: 150px; resize: vertical; }

@media (max-width: 900px) {
  .hero-grid, .feature-grid, .detail-grid, .contact-layout { grid-template-columns: 1fr; }
  .app-grid, .review-grid, .faq-grid { grid-template-columns: 1fr; }
  .screenshot-grid, .check-list { grid-template-columns: 1fr; }
  h1 { font-size: 3rem; }
  h2 { font-size: 2.2rem; }
  .hero-visual { min-height: 230px; }
  .phone-card { width: 138px; min-height: 158px; }
  .phone-card img { width: 78px; height: 78px; }
  .phone-card-one { left: 10%; }
  .phone-card-two { right: 10%; }
  .phone-card-three { left: 50%; transform: translateX(-50%) rotate(-1deg); }
  .screenshot-placeholder { min-height: 300px; }
  .footer-grid { grid-template-columns: 1fr; align-items: start; gap: 16px; }
  .footer-domain { justify-self: start; }
}

@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav-links { position: absolute; top: 64px; left: 16px; right: 16px; display: none; flex-direction: column; align-items: stretch; background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 16px; box-shadow: var(--shadow); }
  .nav-links.open { display: flex; }
  h1 { font-size: 2.35rem; }
  h2 { font-size: 1.85rem; }
  .hero { padding-top: 32px; }
  .hero-visual { display: none; }
  .card-actions { flex-direction: column; align-items: stretch; }
  .btn-link { justify-content: center; }
}