:root {
  --bg: #0d1117;
  --bg-alt: #131a24;
  --card: #161d27;
  --border: #232b36;
  --text: #e6e9ef;
  --text-muted: #9aa4b2;
  --accent: #f2a93b;
  --accent-2: #3ea6ff;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max-width: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

h1, h2, h3 { line-height: 1.25; font-weight: 700; }
h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin: 0 0 0.5rem; }
h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); margin: 0 0 1.5rem; }
h3 { font-size: 1.15rem; margin: 0 0 0.5rem; }

p { color: var(--text-muted); }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #111;
  padding: 0.5rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: 0; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.container--narrow { max-width: 760px; }

/* NAV */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(13, 17, 23, 0.9);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.nav__brand {
  font-weight: 700;
  margin-right: auto;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.nav__icon { display: block; }
.nav__links {
  display: flex;
  gap: 1.25rem;
}
.nav__links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
}
.nav__links a:hover { color: var(--text); }

@media (max-width: 640px) {
  .nav__links { display: none; }
}

/* BUTTONS */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}
.btn--primary {
  background: var(--accent);
  color: #17120a;
}
.btn--primary:hover { opacity: 0.9; }
.btn--nav {
  padding: 0.5rem 1rem;
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
}
.btn--nav:hover { background: var(--accent); color: #17120a; }

/* HERO */
.hero {
  padding: 6rem 0 5rem;
  border-bottom: 1px solid var(--border);
}
.hero__subtitle {
  font-size: 1.2rem;
  color: var(--accent-2);
  margin: 0 0 1.25rem;
}
.hero__lead {
  max-width: 620px;
  font-size: 1.05rem;
}
.hero__cta {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.9rem;
}
.hero__alt {
  color: var(--text-muted);
  font-size: 0.9rem;
  text-decoration: underline;
}

/* SECTIONS */
.section { padding: 5rem 0; }
.section--alt { background: var(--bg-alt); }
.section--contact { text-align: center; border-top: 1px solid var(--border); }
.section--contact .hero__cta { align-items: center; }

/* GRID / CARDS */
.grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 800px) {
  .grid--3, .grid--2 { grid-template-columns: 1fr; }
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.75rem;
}
.card p { margin: 0 0 1rem; }
.card ul { padding-left: 1.1rem; margin: 0; color: var(--text-muted); }
.card li { margin-bottom: 0.4rem; }
/* CAROUSEL */
.carousel {
  position: relative;
  margin-top: 2rem;
}
.carousel__viewport {
  overflow: hidden;
  border-radius: 8px;
}
.carousel__track {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  transition: transform 0.4s ease;
}
.carousel__slide {
  flex: 0 0 100%;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 2rem;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.carousel__img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 8px 0 0 8px;
  background: var(--bg-alt);
}
.carousel__info { padding: 1rem 2rem 1rem 0; }
.carousel__tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
}
.carousel__info h3 { margin-bottom: 0.75rem; }

@media (max-width: 700px) {
  .carousel__slide { grid-template-columns: 1fr; }
  .carousel__img { border-radius: 8px 8px 0 0; }
  .carousel__info { padding: 1.25rem; }
}

.carousel__btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
}
.carousel__btn:hover { border-color: var(--accent); color: var(--accent); }
.carousel__btn--prev { left: -1.25rem; }
.carousel__btn--next { right: -1.25rem; }
@media (max-width: 700px) {
  .carousel__btn { display: none; }
}

.carousel__dots {
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  margin-top: 1.5rem;
}
.carousel__dot {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  border: 1px solid var(--accent);
  background: transparent;
  padding: 0;
  cursor: pointer;
}
.carousel__dot[aria-selected="true"] { background: var(--accent); }

/* STEPS */
.steps {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(2, 1fr);
  row-gap: 2.5rem;
}
@media (max-width: 700px) {
  .steps { grid-template-columns: 1fr; }
}
.steps li { display: flex; gap: 1rem; align-items: flex-start; }
.steps__num {
  flex-shrink: 0;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  border: 1px solid var(--accent);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

/* FAQ */
.faq details {
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before {
  content: "+ ";
  color: var(--accent);
}
.faq details[open] summary::before {
  content: "– ";
}
.faq p { margin-top: 0.75rem; }

/* FOOTER */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  text-align: center;
}
.footer p {
  font-size: 0.85rem;
  margin: 0;
}