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

html {
  scroll-behavior: smooth;
}

body {
  background: #0a0a0a;
  color: #e0e0e0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

a {
  color: #8a8a8a;
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: #ffffff;
}

code {
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", "Courier New", monospace;
}

/* ===== Navbar ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid #1a1a1a;
}

.navbar-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 0.875rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-brand {
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  font-size: 1rem;
  font-weight: 600;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.navbar-brand:hover {
  color: #ffffff;
}

.navbar-links {
  display: flex;
  gap: 1.5rem;
}

.navbar-links a {
  font-size: 0.875rem;
  color: #8a8a8a;
}

.navbar-links a:hover {
  color: #ffffff;
}

.navbar-icon {
  display: flex;
  align-items: center;
}

/* ===== Hero ===== */
.hero {
  text-align: center;
  padding: 6rem 1.5rem 4rem;
  max-width: 960px;
  margin: 0 auto;
}

.hero-logo {
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  font-size: 0.55rem;
  line-height: 1.2;
  color: #ffffff;
  display: inline-block;
  text-align: left;
  overflow-x: auto;
  max-width: 100%;
}

.hero-tagline {
  margin-top: 1.5rem;
  font-size: 1.25rem;
  color: #8a8a8a;
  font-style: italic;
}

/* ===== Install Block ===== */
.install-block {
  margin-top: 2.5rem;
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
  background: #111111;
  border: 1px solid #2a2a2a;
  border-radius: 8px;
}

.install-tabs {
  display: flex;
  gap: 0;
  padding: 0.75rem 1.25rem 0;
  border-bottom: 1px solid #2a2a2a;
}

.install-tab {
  background: none;
  border: none;
  color: #6a6a6a;
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  font-size: 0.8125rem;
  padding: 0.5rem 0.75rem 0.625rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  margin-bottom: -1px;
}

.install-tab:hover {
  color: #c0c0c0;
}

.install-tab.active {
  color: #ffffff;
  border-bottom-color: #ffffff;
}

.install-panel {
  display: none;
  padding: 1.25rem 1.25rem;
  text-align: left;
  overflow-x: auto;
  align-items: center;
  gap: 0.75rem;
}

.install-panel.active {
  display: flex;
}

.install-panel code {
  font-size: 0.875rem;
  color: #e0e0e0;
  white-space: nowrap;
}

/* ===== Copy Button ===== */
.copy-btn {
  color: #4a4a4a;
  background: none;
  border: none;
  padding: 0.25rem;
  cursor: pointer;
  transition: color 0.2s;
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.copy-btn:hover {
  color: #ffffff;
}

.install-text {
  font-size: 0.875rem;
  color: #8a8a8a;
}

.install-text code {
  background: #1a1a1a;
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

.install-link {
  color: #e0e0e0;
  text-decoration: underline;
  text-underline-offset: 2px;
  font-size: 0.875rem;
  margin-left: 0.25rem;
}

.install-link:hover {
  color: #ffffff;
}

/* ===== Features ===== */
.features {
  max-width: 720px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.features h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: #ffffff;
}

.features-intro {
  color: #8a8a8a;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.feature-list li {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}

.feature-marker {
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  color: #5a5a5a;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.feature-title {
  font-weight: 600;
  color: #e0e0e0;
  white-space: nowrap;
}

.feature-desc {
  color: #6a6a6a;
}

/* ===== Highlights ===== */
.highlights {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.highlights-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.highlight-card {
  border: 1px solid #1a1a1a;
  border-radius: 8px;
  padding: 1.25rem 1rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.highlight-icon {
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  font-size: 1.25rem;
  color: #5a5a5a;
}

.highlight-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: #e0e0e0;
}

.highlight-desc {
  font-size: 0.75rem;
  color: #5a5a5a;
}

/* ===== Story ===== */
.story {
  max-width: 720px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.story h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 1rem;
}

.story-body {
  font-size: 1.0625rem;
  color: #8a8a8a;
  line-height: 1.8;
  max-width: 600px;
}

.story-aside {
  margin-top: 1.25rem;
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  font-size: 0.75rem;
  color: #4a4a4a;
}

/* ===== Footer ===== */
.footer {
  border-top: 1px solid #1a1a1a;
  padding: 1.25rem 1.5rem;
  margin-top: 2rem;
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  font-size: 0.8125rem;
}

.footer-inner a {
  color: #6a6a6a;
}

.footer-inner a:hover {
  color: #ffffff;
}

.footer-copy {
  color: #4a4a4a;
}

.footer-sep {
  width: 1px;
  height: 0.75rem;
  background: #2a2a2a;
}

.footer-by {
  color: #4a4a4a;
}

.footer-by a {
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
}

.footer-note {
  color: #3a3a3a;
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
}

/* ===== Changelog ===== */
.changelog-page {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.changelog-page > h1 {
  font-size: 1.5rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 2rem;
}

.changelog-back {
  display: inline-block;
  font-size: 0.875rem;
  color: #6a6a6a;
  margin-bottom: 2rem;
}

.changelog-back:hover {
  color: #ffffff;
}

.changelog-list {
  display: flex;
  flex-direction: column;
}

.changelog-entry {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 2.5rem;
  padding: 2.5rem 0;
  border-top: 1px solid #1a1a1a;
}

.changelog-entry:last-child {
  border-bottom: 1px solid #1a1a1a;
}

.changelog-meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding-top: 0.1rem;
}

.changelog-version {
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
}

.changelog-meta time {
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  font-size: 0.8125rem;
  color: #5a5a5a;
}

.changelog-content h2 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: #e0e0e0;
  margin: 0 0 0.5rem;
}

.changelog-content h2:not(:first-child) {
  margin-top: 1.5rem;
}

.changelog-content h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: #c0c0c0;
  margin: 1.25rem 0 0.375rem;
}

.changelog-content p {
  color: #8a8a8a;
  font-size: 0.9375rem;
  line-height: 1.6;
  margin-bottom: 0.5rem;
}

.changelog-content ul {
  list-style: none;
  padding-left: 0;
  color: #8a8a8a;
  font-size: 0.9375rem;
  line-height: 1.7;
}

.changelog-content li {
  padding-left: 1rem;
  position: relative;
}

.changelog-content li::before {
  content: "-";
  position: absolute;
  left: 0;
  color: #5a5a5a;
}

.changelog-content strong {
  color: inherit;
  font-weight: 600;
}

/* ===== Download ===== */
.download-page {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.download-hero {
  margin-bottom: 3rem;
}

.download-hero h1 {
  font-size: 1.5rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 0.375rem;
}

.download-desc {
  color: #6a6a6a;
  font-size: 0.9375rem;
}

.download-section {
  margin-bottom: 3rem;
}

.download-section h2 {
  font-size: 0.8125rem;
  font-weight: 600;
  color: #6a6a6a;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.download-terminal {
  background: #111111;
  border: 1px solid #1a1a1a;
  border-radius: 6px;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  overflow: hidden;
}

.download-terminal code {
  font-size: 0.875rem;
  color: #e0e0e0;
  overflow-x: auto;
  min-width: 0;
}

.download-version {
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  font-size: 0.8125rem;
  color: #5a5a5a;
  margin-bottom: 1rem;
}

.download-version strong {
  color: #e0e0e0;
}

.download-coming-soon {
  font-size: 0.875rem;
  color: #5a5a5a;
}

.download-table {
  display: flex;
  flex-direction: column;
}

.download-row {
  display: flex;
  align-items: center;
  padding: 0.75rem 0;
  border-top: 1px solid #1a1a1a;
}

.download-row:last-child {
  border-bottom: 1px solid #1a1a1a;
}

.download-platform {
  flex: 1;
  font-size: 0.9375rem;
  color: #e0e0e0;
}

.download-btn {
  font-family: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  font-size: 0.8125rem;
  color: #e0e0e0;
  border: 1px solid #2a2a2a;
  border-radius: 4px;
  padding: 0.3rem 0.875rem;
  transition: border-color 0.2s, color 0.2s;
  flex-shrink: 0;
}

.download-btn:hover {
  color: #ffffff;
  border-color: #5a5a5a;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero {
    padding: 4rem 1rem 3rem;
  }

  .hero-logo {
    font-size: 0.35rem;
  }

  .hero-tagline {
    font-size: 1.1rem;
  }

  .highlights-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature-list li {
    flex-wrap: wrap;
  }

  .feature-desc {
    width: 100%;
    padding-left: 2.75rem;
  }

  .changelog-entry {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

}

@media (max-width: 480px) {
  .hero-logo {
    font-size: 0.25rem;
  }

  .highlights-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .navbar-inner {
    padding: 0.75rem 1rem;
  }

  .navbar-links {
    gap: 1rem;
  }
}