:root {
  --ferdi-red: #E73137;
  --ferdi-red-dark: #c6202a;
  --ferdi-red-soft: #fff1f2;
  --text: #162033;
  --muted: #6b7280;
  --bg: #f5f7fb;
  --white: #ffffff;
  --border: #e5e7eb;
  --shadow: 0 18px 40px rgba(0,0,0,0.08);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(231,49,55,0.12), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, #f6f7fb 100%);
}

.container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(255,255,255,0.86);
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

.header-inner {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: inherit;
}

.brand-logo {
  width: 56px;
  height: 56px;
  object-fit: contain;
  background: white;
  border-radius: 16px;
  padding: 8px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

.brand-kicker {
  display: block;
  color: var(--ferdi-red);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.brand-text h1 {
  margin: 0;
  font-size: 1.2rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.nav a {
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
}

.nav-cta {
  background: var(--ferdi-red);
  color: white !important;
  padding: 12px 16px;
  border-radius: 14px;
}

.hero {
  padding: 56px 0 36px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--ferdi-red-soft);
  color: var(--ferdi-red-dark);
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.hero-left h2 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 4vw, 3.15rem);
  line-height: 1.15;
}

.hero-left p {
  margin: 0 0 24px;
  color: var(--muted);
  line-height: 1.75;
  font-size: 1.03rem;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  padding: 14px 20px;
  border-radius: 16px;
  font-weight: 700;
}

.btn-primary {
  background: linear-gradient(135deg, var(--ferdi-red), var(--ferdi-red-dark));
  color: white;
  box-shadow: 0 12px 24px rgba(231,49,55,0.22);
}

.btn-secondary {
  background: white;
  border: 1px solid var(--border);
  color: var(--text);
}

.preview-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.preview-header {
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.preview-dot {
  width: 10px;
  height: 10px;
  background: var(--ferdi-red);
  border-radius: 50%;
}

.preview-body {
  padding: 18px;
  display: grid;
  gap: 12px;
}

.preview-msg {
  border-radius: 16px;
  padding: 14px;
}

.preview-msg.user {
  background: #fff1f2;
}

.preview-msg.bot {
  background: #f8fafc;
}

.preview-msg strong {
  display: block;
  margin-bottom: 6px;
}

.preview-msg p {
  margin: 0;
  line-height: 1.6;
}

.section {
  padding: 40px 0;
}

.section-alt {
  background: rgba(255,255,255,0.7);
  border-top: 1px solid rgba(0,0,0,0.04);
  border-bottom: 1px solid rgba(0,0,0,0.04);
}

.section-head {
  margin-bottom: 24px;
}

.section-kicker {
  display: inline-block;
  color: var(--ferdi-red);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.section-head h3 {
  margin: 0 0 10px;
  font-size: 1.85rem;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
  max-width: 920px;
}

.card-grid,
.method-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.info-card,
.method-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 22px;
  box-shadow: 0 10px 24px rgba(0,0,0,0.05);
}

.info-card h4,
.method-card h4 {
  margin: 0 0 10px;
}

.info-card p,
.method-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.feature-list {
  display: grid;
  gap: 16px;
}

.feature-item {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 16px;
  background: white;
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 20px;
}

.feature-index {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: var(--ferdi-red-soft);
  color: var(--ferdi-red-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
}

.feature-item h4 {
  margin: 0 0 8px;
}

.feature-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.cta-strip {
  margin-top: 28px;
  border: 1px solid rgba(231,49,55,0.16);
  background: linear-gradient(135deg, rgba(231,49,55,0.08), rgba(255,255,255,0.96));
  border-radius: 24px;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.cta-strip h4 {
  margin: 0 0 6px;
}

.cta-strip p {
  margin: 0;
  color: var(--muted);
}

@media (max-width: 920px) {
  .hero-grid,
  .card-grid,
  .method-grid {
    grid-template-columns: 1fr;
  }

  .feature-item {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 14px 0;
  }

  .nav {
    width: 100%;
  }

  .hero {
    padding-top: 32px;
  }

  .hero-left h2 {
    font-size: 2rem;
  }
}