/* ===== RESET & BASE ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #090f1e;
  --bg-dark: #060b16;
  --bg-section: #0d1528;
  --bg-card: #111827;
  --accent: #0855c4;
  --accent-hover: #0648a8;
  --btn-default: #55555e;
  --btn-default-hover: #444450;
  --text: #ffffff;
  --text-muted: #9aa5be;
  --border: #1e2d4a;
  --gold: #f5a623;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
}

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

ul {
  list-style: none;
}

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  text-align: center;
  border: none;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--accent);
  color: #fff;
}

.btn--primary:hover {
  background: var(--accent-hover);
}

.btn--default {
  background: var(--btn-default);
  color: #fff;
}

.btn--default:hover {
  background: var(--btn-default-hover);
}

.btn--accent {
  background: var(--gold);
  color: #000;
  padding: 10px 22px;
  font-size: 14px;
}

.btn--accent:hover {
  background: #e09510;
}

/* ===== TOP BAR ===== */
.topbar {
  background: linear-gradient(90deg, #0855c4, #0d3d8a, #0855c4);
  text-align: center;
  padding: 10px 20px;
  font-size: 14px;
  color: #fff;
}

.topbar strong {
  color: var(--gold);
}

/* ===== HEADER ===== */
.header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: box-shadow 0.3s;
}

.header--sticky {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
  gap: 20px;
}

.logo {
  flex-shrink: 0;
}

/* ===== NAV ===== */
.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.nav__link {
  padding: 8px 12px;
  font-size: 14px;
  color: #cdd5e0;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
}

.nav__link:hover {
  color: #fff;
  background: rgba(8, 85, 196, 0.2);
}

.nav__cta {
  margin-left: 8px;
}

/* ===== BURGER ===== */
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.burger span {
  display: block;
  width: 26px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all 0.3s;
}

.burger--active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.burger--active span:nth-child(2) {
  opacity: 0;
}
.burger--active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, #060b16 0%, #0d1a35 50%, #0a1628 100%);
  padding: 80px 0 100px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(8, 85, 196, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero__title {
  font-size: clamp(28px, 5vw, 52px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 1px;
  margin-bottom: 20px;
  background: linear-gradient(90deg, #fff 60%, #7eb3ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__sub {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 30px;
  max-width: 560px;
}

.hero__banner {
  display: inline-block;
  background: linear-gradient(90deg, #0855c4, #0d3d8a);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 8px;
  padding: 14px 24px;
  font-size: 16px;
  margin-bottom: 32px;
}

.hero__banner strong {
  color: var(--gold);
  font-size: 20px;
}

.hero__btn {
  font-size: 18px;
  padding: 16px 44px;
}

/* ===== SECTIONS ===== */
.section {
  padding: 70px 0;
  background: var(--bg);
}

.section--dark {
  background: var(--bg-section);
}

.section__title {
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 800;
  margin-bottom: 16px;
  text-align: center;
}

.section__desc {
  text-align: center;
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto 40px;
  font-size: 16px;
  line-height: 1.8;
}

.section__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.section__text h2 {
  font-size: clamp(22px, 2.5vw, 30px);
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.2;
}

.section__text p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 15px;
}

.section__cta {
  text-align: center;
  margin-top: 40px;
}

/* ===== FEATURE LIST ===== */
.feature-list {
  margin: 16px 0 24px;
}

.feature-list li {
  padding: 8px 0;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-list li:last-child {
  border-bottom: none;
}

/* ===== IMAGE PLACEHOLDER ===== */
.img-placeholder {
  background: linear-gradient(135deg, #111827, #0d1528);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 50px 30px;
  text-align: center;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.img-placeholder__icon {
  font-size: 64px;
  line-height: 1;
}

.img-placeholder__text {
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 600;
}

/* ===== CARDS ===== */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 10px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 22px;
  transition: border-color 0.2s, transform 0.2s;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.card__icon {
  font-size: 36px;
  margin-bottom: 14px;
}

.card__title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
}

.card__text {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
}

/* ===== ADVANTAGES ===== */
.advantages {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}

.advantage {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px 20px;
  transition: border-color 0.2s;
}

.advantage:hover {
  border-color: var(--accent);
}

.advantage__num {
  display: block;
  font-size: 36px;
  font-weight: 900;
  color: var(--accent);
  opacity: 0.6;
  margin-bottom: 8px;
  line-height: 1;
}

.advantage h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.advantage p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
}

/* ===== STEPS ===== */
.steps {
  margin: 20px 0 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.step {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 15px;
  color: var(--text-muted);
}

.step__num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

/* ===== FEATURES ===== */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}

.feature {
  text-align: center;
  padding: 30px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color 0.2s, transform 0.2s;
}

.feature:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.feature__icon {
  font-size: 44px;
  margin-bottom: 16px;
}

.feature__title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
}

/* ===== CONCLUSION BANNERS ===== */
.conclusion__banners {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin: 40px 0;
}

.conclusion__banner {
  background: linear-gradient(135deg, #111827, #0d1a35);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px 28px;
  display: flex;
  align-items: center;
  gap: 20px;
  transition: border-color 0.2s;
}

.conclusion__banner:hover {
  border-color: var(--accent);
}

.conclusion__banner-icon {
  font-size: 48px;
  flex-shrink: 0;
}

.conclusion__banner h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.conclusion__banner p {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 16px;
}

.disclaimer {
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
  margin-top: 10px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255,255,255,0.02);
}

/* ===== FOOTER ===== */
.footer {
  background: var(--bg-dark);
  border-top: 1px solid var(--border);
  padding: 40px 0 20px;
}

.footer__inner {}

.footer__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.footer__nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer__nav a {
  color: var(--text-muted);
  font-size: 14px;
  transition: color 0.2s;
}

.footer__nav a:hover {
  color: #fff;
}

.footer__bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  text-align: center;
}

.footer__bottom p {
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.8;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1090px) {
  .section__grid {
    gap: 30px;
  }
}

@media (max-width: 768px) {
  .burger {
    display: flex;
  }

  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 16px 20px;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    z-index: 999;
  }

  .nav--open {
    display: flex;
  }

  .nav__link {
    width: 100%;
    padding: 10px 12px;
  }

  .nav__cta {
    margin-left: 0;
    margin-top: 8px;
    width: 100%;
    text-align: center;
  }

  .header {
    position: sticky;
  }

  .section__grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .section__grid .section__img:first-child {
    order: 2;
  }

  .section__grid .section__text:last-child {
    order: 1;
  }

  .hero {
    padding: 50px 0 70px;
  }

  .hero__title {
    font-size: 30px;
  }

  .hero__sub {
    font-size: 16px;
  }

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

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

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

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

  .footer__top {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer__nav {
    gap: 12px;
  }

  .topbar {
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .cards {
    grid-template-columns: 1fr;
  }

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

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

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

  .hero__btn {
    width: 100%;
  }

  .section {
    padding: 50px 0;
  }
}

/* ===== SCROLL ANIMATION ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card, .advantage, .feature {
  animation: fadeInUp 0.5s ease both;
}