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

body {
  background-color: #161616;
  color: #c4c4c4;
  font-family: 'JetBrains Mono', Consolas, 'Courier New', monospace;
  font-size: 14px;
  line-height: 1.65;
  padding: 3.5rem 1.5rem 4rem;
  display: flex;
  justify-content: center;
}

.container {
  width: 100%;
  max-width: 820px;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

/* Links */
a {
  color: #ef4444;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

code {
  font-family: inherit;
  font-size: 0.9em;
  color: #f87171;
  background: #202020;
  padding: 0.15em 0.35em;
  border-radius: 2px;
}

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid #262626;
}

.brand {
  color: #ef4444;
  font-weight: 700;
  font-size: 1.05rem;
}

.nav {
  display: flex;
  gap: 1.2rem;
}

.nav a {
  color: #888888;
}

.nav a:hover {
  color: #ffffff;
}

/* Intro */
.intro {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.title {
  font-size: 2rem;
  font-weight: 800;
  color: #ffffff;
}

.tagline {
  color: #ef4444;
  font-weight: 700;
  font-size: 0.95rem;
}

.desc {
  color: #9e9e9e;
  font-size: 0.9rem;
  margin-top: 0.4rem;
}

/* Sections */
main {
  display: flex;
  flex-direction: column;
  gap: 2.8rem;
}

.section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

h2 {
  font-size: 0.95rem;
  font-weight: 800;
  color: #ffffff;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.section-text {
  color: #9e9e9e;
  font-size: 0.88rem;
}

.notice {
  color: #888888;
  font-size: 0.84rem;
  border-left: 2px solid #ef4444;
  padding-left: 0.8rem;
  margin-top: 0.2rem;
}

/* Price Banner */
.price-banner {
  background: #1f1f1f;
  border: 1px solid #2e2e2e;
  padding: 0.8rem 1.2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.price {
  font-size: 1.15rem;
  font-weight: 800;
  color: #ffffff;
}

.price-note {
  font-size: 0.82rem;
  color: #888888;
}

/* Tables */
.simple-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
  margin-top: 0.3rem;
}

.simple-table th,
.simple-table td {
  padding: 0.65rem 0.85rem;
  border: 1px solid #262626;
  text-align: left;
}

.simple-table th {
  background: #1c1c1c;
  color: #ffffff;
  font-weight: 700;
}

.simple-table td {
  color: #a8a8a8;
  background: #181818;
}

.simple-table td:first-child {
  color: #ffffff;
}

/* Code box */
.code-box {
  background: #121212;
  border: 1px solid #262626;
  padding: 0.8rem 1rem;
  font-size: 0.82rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.code-title {
  color: #666666;
  font-size: 0.75rem;
}

.code-box pre {
  overflow-x: auto;
}

.code-box code {
  color: #e2e8f0;
  background: transparent;
  padding: 0;
}

/* Steps */
.steps-list {
  padding-left: 1.2rem;
  color: #a8a8a8;
  font-size: 0.88rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.steps-list li::marker {
  color: #ef4444;
  font-weight: 700;
}

/* Footer */
.footer {
  padding-top: 1.5rem;
  border-top: 1px solid #262626;
  font-size: 0.8rem;
  color: #666666;
}

/* Responsive */
@media (max-width: 650px) {
  body {
    padding: 2rem 1rem;
  }
  
  .header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.8rem;
  }
}