/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0a0c10;
  --bg-card:   #111419;
  --bg-card2:  #161b22;
  --border:    rgba(255,255,255,0.07);
  --border2:   rgba(255,255,255,0.12);
  --accent:    #3b82f6;
  --accent-2:  #60a5fa;
  --green:     #22c55e;
  --text:      #e2e8f0;
  --text-muted:#94a3b8;
  --text-dim:  #475569;
  --radius:    12px;
  --radius-lg: 20px;
  --max-w:     1100px;
  --section-gap: 100px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

/* ── Layout ───────────────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: var(--section-gap) 0;
}

/* ── Typography helpers ────────────────────────────────────── */
.section-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 14px;
}

h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 48px;
  color: #fff;
}

h3 {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
}

p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 22px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: opacity 0.15s, transform 0.15s, background 0.15s;
  cursor: pointer;
  border: none;
  white-space: nowrap;
}
.btn:hover { opacity: 0.88; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: #2563eb; opacity: 1; }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border2);
}
.btn-ghost:hover { color: #fff; border-color: rgba(255,255,255,0.25); }

.btn-sm { padding: 8px 16px; font-size: 0.85rem; }

/* ── Badge ─────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  border: 1px solid rgba(59,130,246,0.35);
  color: var(--accent-2);
  background: rgba(59,130,246,0.1);
  margin-bottom: 22px;
}

/* ── Nav ───────────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,12,16,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.nav nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav nav a:not(.btn) {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color 0.15s;
}
.nav nav a:not(.btn):hover { color: var(--text); }

/* ── Logo ──────────────────────────────────────────────────── */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 0.95rem;
  color: #fff;
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
  border-radius: 8px;
}

/* ── Hero ──────────────────────────────────────────────────── */
.hero {
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(59,130,246,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-text h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.1;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.subheadline {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 460px;
  margin-bottom: 36px;
}

.hero-ctas {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ── Phone mockup ──────────────────────────────────────────── */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.phone-mock {
  width: 280px;
  background: var(--bg-card2);
  border-radius: 36px;
  border: 1px solid var(--border2);
  padding: 16px;
  box-shadow: 0 40px 80px rgba(0,0,0,0.6), 0 0 0 1px var(--border);
  position: relative;
}

.phone-mock::before {
  content: '';
  display: block;
  width: 80px;
  height: 6px;
  background: var(--border2);
  border-radius: 999px;
  margin: 0 auto 16px;
}

.phone-screen {
  background: var(--bg);
  border-radius: 24px;
  padding: 16px;
}

.receipt-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.receipt-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 14px 12px;
  border-bottom: 1px solid var(--border);
}

.store-icon { font-size: 1.2rem; }

.store-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
}

.receipt-date {
  font-size: 0.72rem;
  color: var(--text-dim);
}

.receipt-items {
  padding: 10px 14px;
}

.item {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
  padding: 4px 0;
}

.item span:last-child { color: var(--text); font-weight: 500; }

.receipt-total {
  display: flex;
  justify-content: space-between;
  padding: 10px 14px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
}

.receipt-actions {
  display: flex;
  gap: 6px;
  padding: 10px 14px 14px;
}

.pill {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(59,130,246,0.12);
  border: 1px solid rgba(59,130,246,0.25);
  color: var(--accent-2);
  cursor: default;
}

/* ── Problem section ───────────────────────────────────────── */
.problem-section { background: var(--bg-card); }

.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.problem-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color 0.2s, transform 0.2s;
}

.problem-card:hover {
  border-color: var(--border2);
  transform: translateY(-2px);
}

.problem-icon { font-size: 1.6rem; margin-bottom: 14px; }

.problem-card p { font-size: 0.88rem; margin-top: 6px; }

/* ── Solution / Steps ──────────────────────────────────────── */
.steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 680px;
}

.step {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

.step-num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(59,130,246,0.15);
  border: 1px solid rgba(59,130,246,0.3);
  color: var(--accent-2);
  font-size: 0.78rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0.02em;
}

.step-body { padding-top: 8px; }
.step-body h3 { margin-bottom: 6px; }
.step-body p { font-size: 0.9rem; max-width: 520px; }

.step-connector {
  width: 1px;
  height: 36px;
  background: var(--border2);
  margin-left: 20px;
}

/* ── How it works ──────────────────────────────────────────── */
.how-section { background: var(--bg-card); }

.how-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.how-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: border-color 0.2s, transform 0.2s;
}

.how-card:hover {
  border-color: var(--border2);
  transform: translateY(-2px);
}

.how-icon { font-size: 1.8rem; margin-bottom: 16px; }
.how-card p { font-size: 0.9rem; margin-top: 8px; }

/* ── Benefits ──────────────────────────────────────────────── */
.benefits-cols {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 40px;
  align-items: start;
}

.benefit-divider {
  width: 1px;
  background: var(--border);
  min-height: 360px;
  align-self: stretch;
}

.benefit-audience {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 28px;
}

.audience-icon { font-size: 1.3rem; }

.benefit-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.benefit-list li {
  display: flex;
  gap: 14px;
}

.check {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  background: rgba(34,197,94,0.12);
  border: 1px solid rgba(34,197,94,0.3);
  color: var(--green);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  margin-top: 2px;
}

.benefit-list strong {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 4px;
}

.benefit-list p { font-size: 0.85rem; }

/* ── Demo ──────────────────────────────────────────────────── */
.demo-section {
  background: linear-gradient(135deg, var(--bg-card2) 0%, var(--bg) 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.demo-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 60px;
  align-items: center;
}

.demo-text h2 { margin-bottom: 16px; }
.demo-text p { margin-bottom: 28px; max-width: 500px; }

.demo-note {
  margin-top: 14px !important;
  font-size: 0.8rem !important;
  color: var(--text-dim) !important;
}

/* QR frame */
.qr-frame {
  width: 180px;
  height: 180px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border2);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  flex-shrink: 0;
}

.qr-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 100%;
}

.qr-svg {
  width: 110px;
  height: 110px;
  color: var(--text);
}

.qr-label {
  font-size: 0.65rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
  text-align: center;
}

/* ── Footer ────────────────────────────────────────────────── */
.footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 0.9rem;
  color: #fff;
}

.footer-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.footer-dot { opacity: 0.4; }

.proto-badge {
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid var(--border2);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 860px) {
  :root { --section-gap: 70px; }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-visual { order: -1; }

  .phone-mock { width: 240px; }

  .how-grid { grid-template-columns: 1fr; }

  .benefits-cols {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .benefit-divider { display: none; }

  .demo-inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .qr-frame { display: none; }

  .footer-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 600px) {
  :root { --section-gap: 56px; }

  .nav nav a:not(.btn) { display: none; }

  .problem-grid { grid-template-columns: 1fr 1fr; }

  .hero-text h1 { font-size: 2rem; }

  .hero-ctas { flex-direction: column; }
  .hero-ctas .btn { width: 100%; justify-content: center; }
}

@media (max-width: 420px) {
  .problem-grid { grid-template-columns: 1fr; }
}