*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-primary: #2d2d2d;
  --color-secondary: #767676;
  --color-success: #018849;
  --color-success-hover: #016b3a;
  --color-border: #ddd;
  --color-bg: #ffffff;
  --color-bg-muted: #f5f5f5;
}

body {
  font-family: "DM Sans", sans-serif;
  color: var(--color-primary);
  background: var(--color-bg);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

a { color: var(--color-primary); }

img { display: block; max-width: 100%; height: auto; }

/* ── Layout ── */
.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

.wrap-narrow {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Nav ── */
.nav {
  border-bottom: 1px solid var(--color-border);
  padding: 20px 0;
}

.nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.125rem;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-logo-go {
  color: var(--color-success);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-link {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  color: var(--color-secondary);
}

.nav-link:hover { color: var(--color-primary); }

.lang-switch {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  color: var(--color-secondary);
}

.lang-switch:hover { color: var(--color-primary); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 10px 24px;
  border: 1px solid var(--color-primary);
  text-decoration: none;
  transition: background 150ms;
}

.nav-cta:hover { background: #1a1a1a; }

/* ── Hero ── */
.hero {
  position: relative;
  background: var(--color-primary);
  color: #fff;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: url("https://images.unsplash.com/photo-1558618666-fcd25c85f82e?w=1400&h=700&fit=crop") center/cover no-repeat;
  opacity: 0.3;
}

.hero-content {
  position: relative;
  padding: 100px 24px;
  max-width: 1080px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 2.75rem;
  max-width: 680px;
  margin-bottom: 24px;
}

.hero p {
  font-size: 1.125rem;
  max-width: 540px;
  line-height: 1.7;
  opacity: 0.85;
  margin-bottom: 40px;
}

.btn-hero {
  display: inline-flex;
  align-items: center;
  background: var(--color-success);
  color: #fff;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.1em;
  padding: 14px 36px;
  border: none;
  text-decoration: none;
  transition: background 150ms;
}

.btn-hero:hover { background: var(--color-success-hover); }

/* ── Sections ── */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--color-bg-muted);
}

.section-label {
  font-weight: 700;
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--color-secondary);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2rem;
  margin-bottom: 20px;
}

.section-subtitle {
  color: var(--color-secondary);
  font-size: 1.0625rem;
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 48px;
}

/* ── Three-column grid ── */
.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.grid-3-item h3 {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.grid-3-item p {
  color: var(--color-secondary);
  line-height: 1.7;
}

.grid-3-icon {
  width: 48px;
  height: 48px;
  border: 2px solid var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 20px;
}

/* ── Concepts ── */
.concepts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.concept-card {
  border: 1px solid var(--color-border);
  padding: 32px;
}

.concept-icon {
  width: 48px;
  height: 48px;
  border: 2px solid var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 20px;
}

.concept-card h3 {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.concept-card p {
  color: var(--color-secondary);
  line-height: 1.7;
}

/* ── Concept Examples ── */
.example-card {
  border: 1px solid var(--color-border);
  padding: 40px;
  margin-bottom: 40px;
}

.example-card:last-child {
  margin-bottom: 0;
}

.example-images {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.example-images img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.example-text h3 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.example-text p {
  color: var(--color-secondary);
  line-height: 1.8;
}

/* ── Alternating rows ── */
.row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 64px;
}

.row:last-child { margin-bottom: 0; }

.row-img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.row-text h3 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.row-text p {
  color: var(--color-secondary);
  line-height: 1.7;
}

/* ── Steps ── */
.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  counter-reset: step;
}

.step {
  counter-increment: step;
  padding-left: 56px;
  position: relative;
}

.step::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 40px;
  height: 40px;
  border: 2px solid var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
}

.step h3 {
  font-size: 1.125rem;
  margin-bottom: 6px;
}

.step p {
  color: var(--color-secondary);
  line-height: 1.7;
}

/* ── Checklist ── */
.checklist {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.checklist li {
  padding-left: 32px;
  position: relative;
  line-height: 1.6;
}

.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-success);
  background: var(--color-success);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23fff' d='M10 3L4.5 8.5 2 6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

/* ── Testimonials ── */
.testimonials {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.testimonial {
  border: 1px solid var(--color-border);
  padding: 32px;
}

.testimonial blockquote {
  font-size: 1.0625rem;
  line-height: 1.7;
  margin-bottom: 16px;
  font-style: italic;
}

.testimonial cite {
  font-style: normal;
  font-weight: 700;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.testimonial cite span {
  font-style: normal;
  font-weight: 400;
  color: var(--color-secondary);
  text-transform: none;
  letter-spacing: 0;
}

/* ── Contact ── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.contact-item h3 {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-secondary);
  margin-bottom: 8px;
}

.contact-item p {
  font-size: 1.0625rem;
}

.contact-item a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
  color: var(--color-secondary);
  font-size: 0.875rem;
}

.footer .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

/* ── CTA Banner ── */
.cta-banner {
  background: var(--color-primary);
  color: #fff;
  padding: 64px 0;
  text-align: center;
}

.cta-banner h2 {
  font-size: 2rem;
  margin-bottom: 16px;
}

.cta-banner p {
  opacity: 0.8;
  margin-bottom: 32px;
  font-size: 1.0625rem;
}

/* ── Responsive ── */
@media (min-width: 640px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .concepts-grid { grid-template-columns: repeat(3, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .checklist { grid-template-columns: repeat(2, 1fr); }
  .testimonials { grid-template-columns: repeat(3, 1fr); }
  .contact-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 768px) {
  .hero h1 { font-size: 3.25rem; }
  .hero-content { padding: 120px 24px; }
  .row { grid-template-columns: 1fr 1fr; }
  .row-reverse { direction: rtl; }
  .row-reverse > * { direction: ltr; }
  .example-images { grid-template-columns: 1fr 1fr; }
  .example-images-3 { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1024px) {
  .steps { grid-template-columns: repeat(4, 1fr); }
}