/* mterm project page · dark terminal theme · accent teal #34c9b5 on #0b1110 */
:root {
  --bg: #0b1110;
  --bg-soft: #101817;
  --bg-raised: #14201d;
  --paper: #f2f7f5;
  --paper-deep: #b9cdc7;
  --ink: #0b1110;
  --line: #26413b;
  --line-dark: #1e332e;
  --accent: #34c9b5;
  --accent-ink: #06231e;
  --accent-soft: #9fe8da;
  --warn: #e8b44a;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-round: 999px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  overflow-x: clip;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--paper);
  font-family: "Hiragino Kaku Gothic ProN", "Noto Sans JP", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.8;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--accent-soft);
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.6rem 1rem;
  min-height: 44px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  border-radius: var(--radius-sm);
  transform: translateY(-250%);
  text-decoration: none;
}

.skip-link:focus {
  transform: translateY(0);
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(11, 17, 16, 0.96);
  border-bottom: 1px solid var(--line-dark);
}

.header-inner,
.page-width {
  width: min(100% - 2.5rem, 74rem);
  margin-inline: auto;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding-block: 0.7rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.125rem;
  text-decoration: none;
  margin-right: auto;
  min-height: 44px;
}

.brand .prompt {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--accent);
}

.main-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  font-size: 0.9375rem;
}

.main-nav a {
  text-decoration: none;
  opacity: 0.85;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.main-nav a:hover {
  opacity: 1;
}

.nav-download {
  padding: 0.35rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-round);
  opacity: 1 !important;
  color: var(--accent-soft);
}

.header-release {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.8125rem;
  color: var(--accent);
  border: 1px solid var(--line);
  border-radius: var(--radius-round);
  padding: 0.2rem 0.8rem;
  white-space: nowrap;
}

.language-switcher-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.25rem;
  border-top: 1px solid var(--line-dark);
  padding: 0.35rem max(1.25rem, calc((100% - 74rem) / 2));
  font-size: 0.875rem;
}

.language-switcher-bar a {
  text-decoration: none;
  opacity: 0.7;
  padding: 0.45rem 0.8rem;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border-radius: var(--radius-sm);
}

.language-switcher-bar a:hover {
  opacity: 1;
}

.language-switcher-bar a[aria-current="page"] {
  opacity: 1;
  color: var(--accent);
  font-weight: 700;
}

/* Hero */

.hero {
  padding-block: 3.5rem 4rem;
  background: radial-gradient(60rem 30rem at 80% -10%, rgba(52, 201, 181, 0.14), transparent 60%), var(--bg);
}

.hero-grid {
  width: min(100% - 2.5rem, 74rem);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.hero-grid > *,
.edition-cards > *,
.project-note > * {
  min-width: 0;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.release-line {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.875rem;
  letter-spacing: 0.03em;
  color: var(--accent);
  margin: 0 0 1rem;
}

.hero-copy h1 {
  font-size: clamp(1.75rem, 4.5vw, 2.75rem);
  line-height: 1.5;
  margin: 0;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.hero-lead {
  font-size: 1.125rem;
  line-height: 1.9;
  color: var(--paper-deep);
  max-width: 38rem;
  margin: 1.25rem 0 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius-round);
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  text-decoration: none;
  border: 2px solid var(--accent);
}

.button:hover {
  color: var(--accent-ink);
  transform: translateY(-1px);
}

.button-secondary {
  background: transparent;
  color: var(--paper);
  border-color: var(--line);
}

.button-secondary:hover {
  color: var(--accent-soft);
  border-color: var(--accent);
}

.hero-aside {
  background: var(--bg-soft);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  align-items: center;
  text-align: center;
}

.terminal-mock {
  width: 100%;
  text-align: left;
  background: #060c0b;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-md);
  overflow: hidden;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.8125rem;
  line-height: 1.7;
}

.terminal-bar {
  display: flex;
  gap: 0.4rem;
  padding: 0.55rem 0.8rem;
  background: var(--bg-raised);
  border-bottom: 1px solid var(--line-dark);
}

.terminal-bar i {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--line);
}

.terminal-bar i:first-child {
  background: var(--warn);
}

.terminal-bar i:last-child {
  background: var(--accent);
}

.terminal-mock pre {
  margin: 0;
  padding: 0.9rem 1rem;
  white-space: pre-wrap;
  word-break: break-all;
  color: var(--paper-deep);
}

.terminal-mock .p {
  color: var(--accent);
}

.aside-note {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--paper-deep);
}

.aside-facts {
  list-style: none;
  margin: 0;
  padding: 1rem 0 0;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  border-top: 1px solid var(--line-dark);
  font-size: 0.875rem;
}

.aside-facts li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.aside-facts span {
  color: var(--accent);
}

/* Page index */

.page-index {
  border-block: 1px solid var(--line-dark);
  background: var(--bg-soft);
}

.page-index-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.5rem;
  padding-block: 0.6rem;
  font-size: 0.875rem;
}

.page-index-label {
  color: var(--accent);
  font-weight: 700;
}

.page-index-inner ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  margin: 0;
  padding: 0;
}

.page-index-inner a {
  text-decoration: none;
  opacity: 0.75;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.page-index-inner a:hover {
  opacity: 1;
}

/* Sections */

.section {
  padding-block: 3.5rem;
}

.section-alt {
  background: var(--bg-soft);
  border-block: 1px solid var(--line-dark);
}

.section-heading {
  max-width: 44rem;
  margin-bottom: 2rem;
}

.section-heading h2 {
  font-size: clamp(1.375rem, 3vw, 1.875rem);
  line-height: 1.6;
  margin: 0 0 1rem;
}

.section-heading p {
  color: var(--paper-deep);
  line-height: 1.9;
  margin: 0;
}

.section-heading code,
.desktop-points code,
.step-list code,
.edition-card code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: #060c0b;
  border: 1px solid var(--line-dark);
  padding: 0.1em 0.45em;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
  color: var(--accent-soft);
}

.feature-ledger {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem 2.5rem;
  margin: 0;
}

.feature-row {
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

.feature-number {
  display: block;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.feature-row dt {
  font-weight: 700;
  font-size: 1.125rem;
  line-height: 1.6;
  margin-bottom: 0.4rem;
}

.feature-row dd {
  margin: 0;
  color: var(--paper-deep);
  line-height: 1.85;
}

/* Editions */

.edition-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.edition-card {
  background: var(--bg-raised);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.edition-card.is-main {
  border-color: var(--accent);
}

.edition-tag {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.edition-card h3 {
  margin: 0;
  font-size: 1.25rem;
  line-height: 1.6;
}

.edition-card p,
.edition-card li {
  color: var(--paper-deep);
  font-size: 0.9375rem;
  line-height: 1.85;
}

.edition-card p {
  margin: 0;
}

.edition-card ul {
  margin: 0;
  padding-left: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

/* Safety / lists */

.desktop-points {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 46rem;
}

.desktop-points li {
  padding-left: 1.5rem;
  position: relative;
  line-height: 1.85;
  color: var(--paper-deep);
}

.desktop-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: var(--radius-round);
  background: var(--accent);
}

.desktop-points li strong {
  color: var(--paper);
}

/* Languages */

.lang-chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0 0;
  padding: 0;
}

.lang-chips li {
  padding: 0.55rem 1.4rem;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-round);
  font-weight: 600;
}

/* Get started */

.install-platform {
  background: var(--bg-raised);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  max-width: 44rem;
}

.install-platform h3 {
  margin: 0 0 1rem;
  font-size: 1.125rem;
  line-height: 1.6;
}

.step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.step-list li {
  display: flex;
  gap: 0.75rem;
  align-items: baseline;
  line-height: 1.85;
  color: var(--paper-deep);
}

.step-number {
  flex-shrink: 0;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: var(--radius-round);
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  font-size: 0.875rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: flex-start;
  margin-top: 0.25rem;
}

.install-reference {
  margin: 1.25rem 0 0;
}

.release-warning {
  margin-top: 1.5rem;
  color: var(--warn);
  font-size: 0.875rem;
  line-height: 1.85;
  max-width: 46rem;
}

/* Community */

.project-note {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2rem;
  align-items: start;
}

.project-note h2 {
  font-size: clamp(1.375rem, 3vw, 1.875rem);
  line-height: 1.6;
  margin: 0 0 1rem;
}

.project-note p {
  color: var(--paper-deep);
  line-height: 1.9;
  margin: 0;
}

.link-columns {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.link-columns a {
  padding: 0.7rem 1.25rem;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
}

.link-columns a:hover {
  border-color: var(--accent);
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--line-dark);
  font-size: 0.875rem;
  color: var(--paper-deep);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  padding-block: 1.25rem;
}

.footer-inner a {
  text-decoration: none;
  opacity: 0.85;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.footer-inner a:hover {
  opacity: 1;
}

/* Responsive */

@media (max-width: 900px) {
  .hero-grid,
  .project-note {
    grid-template-columns: 1fr;
  }

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

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

  .main-nav {
    display: none;
  }
}

@media (max-width: 560px) {
  .header-inner {
    gap: 0.75rem;
  }

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

  .hero {
    padding-block: 2.5rem 3rem;
  }

  .section {
    padding-block: 2.5rem;
  }
}