:root {
  --paper: #e9e7e1;
  --paper-deep: #dddacc;
  --paper-lift: #f3f1eb;
  --ink: #14161c;
  --ink-soft: #5c616b;
  --now: #b91c2c;
  --rule: rgba(20, 22, 28, 0.1);
  --font-display: "Instrument Serif", "Times New Roman", serif;
  --font-body: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
}

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 70% 50% at 12% 0%, rgba(185, 28, 44, 0.08), transparent 55%),
    radial-gradient(ellipse 55% 45% at 88% 12%, rgba(47, 93, 80, 0.09), transparent 50%),
    linear-gradient(160deg, var(--paper) 0%, var(--paper-deep) 100%);
  animation: wash 18s ease-in-out infinite alternate;
}

@keyframes wash {
  from { opacity: 1; }
  to { opacity: 0.92; }
}

.shell {
  width: min(74rem, 100%);
  margin: 0 auto;
  padding: 0 clamp(1.5rem, 4vw, 3.75rem);
}

/* —— Header —— */
.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: clamp(1.35rem, 2.5vw, 1.85rem) 0;
  border-bottom: 1px solid transparent;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.55rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.mark {
  display: block;
  flex-shrink: 0;
  color: var(--ink);
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.98rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

.nav a:hover {
  color: var(--ink);
}

.nav-cta {
  color: var(--ink) !important;
  font-weight: 600 !important;
}

/* —— Hero —— */
main {
  padding-bottom: 4rem;
}

.hero {
  display: grid;
  gap: clamp(2.5rem, 5vw, 4rem);
  align-items: center;
  min-height: min(82vh, 46rem);
  padding: clamp(2.5rem, 6vh, 4.5rem) 0 clamp(2rem, 4vh, 3rem);
  animation: rise 0.85s ease-out both;
}

@media (min-width: 960px) {
  .hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 3.5rem;
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.brand {
  display: flex;
  align-items: center;
  gap: clamp(0.65rem, 1.5vw, 1.1rem);
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(3.75rem, 8vw, 6.25rem);
  margin: 0 0 0.85rem;
  letter-spacing: -0.035em;
  line-height: 0.92;
  animation: rise 0.95s 0.05s ease-out both;
}

.brand-mark {
  display: block;
  width: clamp(2.75rem, 6vw, 4.5rem);
  height: auto;
  flex-shrink: 0;
  color: var(--ink);
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
  font-size: clamp(1.7rem, 2.8vw, 2.4rem);
  line-height: 1.2;
  margin: 0 0 1rem;
  max-width: 16ch;
  color: var(--ink);
}

.lede {
  margin: 0 0 2.15rem;
  color: var(--ink-soft);
  max-width: 32rem;
  font-size: clamp(1.08rem, 1.35vw, 1.22rem);
  line-height: 1.55;
  font-weight: 400;
}

/* —— Install panel (Terminal-first) —— */
.install-panel {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.85rem;
  width: min(100%, 36rem);
  padding: 1.35rem 1.4rem 1.45rem;
  background: var(--paper-lift);
  border: 1px solid var(--rule);
  border-radius: 8px;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.45) inset;
}

.install-title {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: 1.65rem;
  margin: 0;
  letter-spacing: -0.02em;
}

.os-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.os-tab {
  appearance: none;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--ink-soft);
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 0.4rem 0.85rem;
  border-radius: 4px;
  cursor: pointer;
}

.os-tab:hover {
  color: var(--ink);
  border-color: rgba(20, 22, 28, 0.25);
}

.os-tab.is-active {
  color: var(--paper);
  background: var(--ink);
  border-color: var(--ink);
}

.install-howto {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1.25rem;
}

.install-howto li {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.install-howto li span {
  color: var(--ink);
  font-weight: 600;
}

.install-cmd {
  width: 100%;
  border-radius: 4px;
  background: var(--ink);
  overflow: hidden;
}

.install-cmd code {
  display: block;
  padding: 1rem 1.1rem;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: clamp(0.72rem, 1.6vw, 0.84rem);
  line-height: 1.45;
  color: var(--paper);
  word-break: break-all;
  user-select: all;
}

.install-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  width: 100%;
}

.btn-primary {
  appearance: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--paper);
  background: var(--ink);
  padding: 0.9rem 1.45rem;
  border-radius: 4px;
  transition: background 0.2s ease, transform 0.2s ease;
}

.btn-primary:hover {
  background: var(--now);
  transform: translateY(-1px);
}

.btn-primary:focus-visible {
  outline: 2px solid var(--now);
  outline-offset: 3px;
}

.btn-primary.is-copied {
  background: var(--now);
}

.install-hint {
  margin: 0;
  min-height: 1.25em;
  color: var(--now);
  font-size: 0.95rem;
  font-weight: 600;
}

.install-note {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.install-more {
  width: 100%;
  margin-top: 0.25rem;
  border-top: 1px solid var(--rule);
  padding-top: 0.75rem;
}

.install-more summary {
  cursor: pointer;
  color: var(--ink-soft);
  font-size: 0.92rem;
  font-weight: 500;
  list-style: none;
}

.install-more summary::-webkit-details-marker {
  display: none;
}

.install-more summary::after {
  content: " +";
  color: var(--now);
}

.install-more[open] summary::after {
  content: " −";
}

.install-more p {
  margin: 0.75rem 0 0;
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.5;
}

.install-more a {
  color: var(--ink);
  font-weight: 600;
}

.install-more a:hover {
  color: var(--now);
}

.os-note {
  margin: 0.25rem 0 0;
  color: var(--now);
  font-size: 0.95rem;
  font-weight: 500;
}

code.inline {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.86em;
  background: rgba(20, 22, 28, 0.06);
  padding: 0.12em 0.35em;
  border-radius: 3px;
  word-break: break-all;
}

/* —— Product visual —— */
.hero-visual {
  display: flex;
  justify-content: center;
  animation: rise 1.05s 0.12s ease-out both;
}

.journal {
  width: min(100%, 26rem);
  background: var(--paper-lift);
  border: 1px solid var(--rule);
  border-radius: 10px;
  overflow: hidden;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.5) inset,
    0 24px 48px rgba(20, 22, 28, 0.08);
  transform: rotate(-0.6deg);
}

.journal-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--rule);
  background: rgba(233, 231, 225, 0.65);
}

.journal-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(20, 22, 28, 0.18);
}

.journal-title {
  margin-left: auto;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--ink);
}

.journal-body {
  padding: 1.35rem 1.35rem 1.5rem;
}

.journal-kicker {
  margin: 0 0 1rem;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.journal-line {
  margin: 0 0 0.7rem;
  font-size: 0.98rem;
  color: var(--ink);
  display: flex;
  gap: 0.75rem;
}

.journal-line.accent {
  color: var(--now);
}

.jl-time {
  flex: 0 0 2.6rem;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
  font-size: 0.92rem;
}

.journal-line.accent .jl-time {
  color: var(--now);
  opacity: 0.75;
}

.journal-ask {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.ask-label {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--now);
  font-size: 1.05rem;
}

.ask-q {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* —— Trust —— */
.trust {
  padding: 1.4rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  animation: rise 1s 0.16s ease-out both;
}

.trust ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem 2rem;
}

@media (min-width: 700px) {
  .trust ul {
    grid-template-columns: repeat(3, 1fr);
  }
}

.trust li {
  color: var(--ink-soft);
  font-size: 1.02rem;
  font-weight: 500;
  position: relative;
  padding-left: 1rem;
}

.trust li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--now);
}

/* —— Pillars —— */
.pillars {
  display: grid;
  gap: 2rem;
  margin: clamp(3rem, 7vw, 4.5rem) 0 0;
  padding-top: clamp(0.5rem, 2vw, 1rem);
}

@media (min-width: 800px) {
  .pillars {
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
  }
}

.pillars h2 {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.65rem, 2.2vw, 2rem);
  margin: 0 0 0.65rem;
}

.pillars p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
  max-width: 28ch;
  line-height: 1.5;
}

/* —— Footer —— */
footer {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding: 2.5rem 0 3.5rem;
  border-top: 1px solid var(--rule);
  margin-top: 1rem;
}

.foot-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.25rem;
  color: var(--ink);
}

.foot-note {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

@media (prefers-reduced-motion: reduce) {
  .atmosphere,
  .hero,
  .brand,
  .hero-visual,
  .trust {
    animation: none;
  }
  .btn-primary:hover {
    transform: none;
  }
  .journal {
    transform: none;
  }
}