:root {
  --bg: #0b1220;
  --card: #121c2f;
  --text: #f4f7ff;
  --muted: #a9b7d3;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --border: rgba(169, 183, 211, 0.25);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background: linear-gradient(150deg, #0b1220 0%, #121f37 100%);
  color: var(--text);
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.brand {
  font-size: 24px;
  font-weight: 700;
}

.nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.nav a {
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid transparent;
}

.nav a:hover {
  border-color: var(--border);
  background: rgba(255, 255, 255, 0.05);
}

.card {
  margin-top: 22px;
  background: rgba(18, 28, 47, 0.92);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 30px 24px;
  box-shadow: 0 10px 34px rgba(0, 0, 0, 0.34);
}

h1, h2 {
  margin-top: 0;
}

.hero {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 18px;
  align-items: center;
}

.hero-logo-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-logo-img {
  width: min(100%, 420px);
  height: auto;
  display: block;
  mix-blend-mode: screen;
  filter: contrast(1.04) saturate(1.05);
}

p, li {
  color: var(--muted);
  line-height: 1.6;
}

a {
  color: #7fb0ff;
}

a:hover {
  color: #a9c9ff;
}

ul {
  padding-left: 22px;
}

.btn {
  display: inline-block;
  margin-top: 14px;
  padding: 11px 16px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 700;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
}

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

.btn.secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn.secondary:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--text);
}

.muted {
  color: var(--muted);
  font-size: 14px;
}

.version-chip {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #dce7ff;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 10px;
  margin-bottom: 10px;
  background: rgba(255, 255, 255, 0.04);
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.list-clean {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.list-clean li {
  padding: 7px 0;
  border-bottom: 1px dashed rgba(169, 183, 211, 0.2);
}

.list-clean li:last-child {
  border-bottom: 0;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 10px;
  overflow: hidden;
}

.faq-btn {
  width: 100%;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  border: 0;
  text-align: left;
  padding: 12px 14px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}

.faq-btn:hover {
  background: rgba(255, 255, 255, 0.07);
}

.faq-content {
  display: none;
  padding: 0 14px 12px;
}

.faq-item.open .faq-content {
  display: block;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.contact-form {
  display: grid;
  gap: 10px;
  margin-top: 8px;
}

.contact-form label {
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font: inherit;
}

.contact-form textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: #7fb0ff;
  box-shadow: 0 0 0 3px rgba(127, 176, 255, 0.16);
}

.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

@media (max-width: 760px) {
  .container {
    padding: 14px;
  }

  .card {
    padding: 22px 16px;
  }

  .hero {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-logo-img {
    width: min(100%, 320px);
  }

  .brand {
    font-size: 20px;
  }

  .nav a {
    font-size: 13px;
    padding: 7px 9px;
  }

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