/* easySFTP site — plain CSS, no build step.
   Type: IBM Plex Mono (display, labels, code) + IBM Plex Sans (body).
   Signature: section headers styled as YAML keys, "=>" as recurring motif. */

:root {
  --bg: #fafbf9;
  --surface: #f0f2ee;
  --line: #dce1db;
  --ink: #1c2420;
  --muted: #62706a;
  --accent: #0e6b5c;
  --term-bg: #10201b;
  --term-line: #23352e;
  --term-ink: #d5e3dc;
  --term-dim: #8aa69b;
  --term-accent: #55c9a6;
  --term-str: #e8c170;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --maxw: 60rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1513;
    --surface: #16201c;
    --line: #263129;
    --ink: #dee7e1;
    --muted: #8ca096;
    --accent: #4ec5a2;
    --term-bg: #0a100e;
    --term-line: #1f2b26;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

code, pre, kbd { font-family: var(--mono); }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- nav ---------- */

.nav {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.nav .wrap {
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
}
.brand {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1rem;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.brand:hover { text-decoration: none; }
.brand .cursor { color: var(--accent); }
.nav-links {
  margin-left: auto;
  display: flex;
  gap: 1.25rem;
  font-family: var(--mono);
  font-size: 0.85rem;
}
.nav-links a { color: var(--muted); }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); }

/* ---------- hero ---------- */

.hero { padding: 5rem 0 4rem; }
.hero .wrap {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 3rem;
  align-items: center;
}
.eyebrow {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--muted);
  margin: 0 0 1.25rem;
}
.eyebrow .key { color: var(--accent); }
.hero h1 {
  font-family: var(--mono);
  font-weight: 600;
  font-size: clamp(1.5rem, 3.4vw, 2.3rem);
  letter-spacing: -0.03em;
  line-height: 1.25;
  margin: 0 0 1.25rem;
  overflow-wrap: break-word;
}
.hero h1 .arrow { color: var(--accent); }
.hero .lede {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 34rem;
  margin: 0 0 2rem;
}
.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.85rem;
  padding: 0.55rem 1rem;
  border: 1px solid var(--line);
  color: var(--ink);
}
.btn:hover { text-decoration: none; border-color: var(--muted); }
.btn-primary {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--bg);
}
.btn-primary:hover { border-color: var(--ink); }

/* ---------- terminal panel ---------- */

.term {
  background: var(--term-bg);
  border: 1px solid var(--term-line);
  border-radius: 6px;
  font-size: 0.82rem;
  line-height: 1.7;
  min-width: 0;
}
.term-head {
  display: flex;
  align-items: center;
  padding: 0.5rem 0.9rem;
  border-bottom: 1px solid var(--term-line);
  color: var(--term-dim);
  font-family: var(--mono);
  font-size: 0.75rem;
}
.term pre {
  margin: 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  color: var(--term-ink);
}
.term .k { color: var(--term-dim); }
.term .s { color: var(--term-str); }
.term .a { color: var(--term-accent); }
.copy-btn {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.72rem;
  background: none;
  border: 1px solid var(--term-line);
  color: var(--term-dim);
  padding: 0.15rem 0.6rem;
  border-radius: 4px;
  cursor: pointer;
}
.copy-btn:hover { color: var(--term-ink); border-color: var(--term-dim); }

/* ---------- sections ---------- */

.section { padding: 3.5rem 0; border-top: 1px solid var(--line); }
.section-key {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1.05rem;
  margin: 0 0 2rem;
  letter-spacing: -0.02em;
}
.section-key::after { content: ":"; color: var(--accent); }

.features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem 3rem;
  padding: 0;
  margin: 0;
  list-style: none;
}
.features h3 {
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0 0 0.4rem;
}
.features h3::before { content: "- "; color: var(--accent); }
.features p { margin: 0; color: var(--muted); font-size: 0.95rem; }

/* strategy + generic tables */
.table-wrap { overflow-x: auto; }
table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.92rem;
}
th, td {
  text-align: left;
  padding: 0.6rem 1rem 0.6rem 0;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--muted);
}
td code { font-size: 0.85em; background: var(--surface); padding: 0.1em 0.35em; border-radius: 3px; }
.section .aside { color: var(--muted); font-size: 0.9rem; margin-top: 1.5rem; max-width: 44rem; }

/* docs index on landing */
.doc-list { list-style: none; margin: 0; padding: 0; max-width: 44rem; }
.doc-list li { border-bottom: 1px solid var(--line); }
.doc-list a {
  display: flex;
  gap: 1rem;
  align-items: baseline;
  padding: 0.8rem 0;
  color: var(--ink);
}
.doc-list a:hover { text-decoration: none; }
.doc-list a:hover .doc-name { text-decoration: underline; text-underline-offset: 3px; }
.doc-name { font-family: var(--mono); font-size: 0.9rem; font-weight: 500; min-width: 11rem; }
.doc-name::after { content: " =>"; color: var(--accent); }
.doc-desc { color: var(--muted); font-size: 0.92rem; }

/* ---------- footer ---------- */

.footer { border-top: 1px solid var(--line); padding: 2rem 0 3rem; }
.footer .wrap {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--muted);
}
.footer a { color: var(--muted); }
.footer a:hover { color: var(--ink); }
.footer .spacer { margin-left: auto; }

/* ---------- docs page ---------- */

.docs-layout {
  display: grid;
  grid-template-columns: 14rem minmax(0, 1fr);
  gap: 3rem;
  padding: 2.5rem 0 4rem;
}
.sidebar {
  position: sticky;
  top: 2rem;
  align-self: start;
  font-family: var(--mono);
  font-size: 0.85rem;
}
.sidebar .group {
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: lowercase;
  margin: 1.5rem 0 0.5rem;
}
.sidebar .group::after { content: ":"; color: var(--accent); }
.sidebar .group:first-child { margin-top: 0; }
.sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar a {
  display: block;
  padding: 0.25rem 0 0.25rem 0.9rem;
  color: var(--muted);
  border-left: 2px solid transparent;
}
.sidebar a:hover { color: var(--ink); text-decoration: none; }
.sidebar a.active { color: var(--ink); border-left-color: var(--accent); }

/* rendered markdown */
.md { max-width: 44rem; min-width: 0; }
.md > :first-child { margin-top: 0; }
.md h1, .md h2, .md h3, .md h4 {
  font-family: var(--mono);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
  scroll-margin-top: 1.5rem;
}
.md h1 { font-size: 1.6rem; margin: 0 0 1.5rem; }
.md h2 { font-size: 1.2rem; margin: 2.5rem 0 1rem; padding-top: 1.5rem; border-top: 1px solid var(--line); }
.md h3 { font-size: 1rem; margin: 2rem 0 0.75rem; }
.md h4 { font-size: 0.9rem; margin: 1.5rem 0 0.5rem; }
.md .anchor { color: var(--line); margin-left: 0.5rem; font-weight: 400; }
.md h1:hover .anchor, .md h2:hover .anchor, .md h3:hover .anchor, .md h4:hover .anchor { color: var(--accent); }
.md p, .md ul, .md ol { margin: 0 0 1rem; }
.md li { margin-bottom: 0.3rem; }
.md li > ul, .md li > ol { margin: 0.3rem 0 0; }
.md code {
  font-size: 0.85em;
  background: var(--surface);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}
.md pre {
  background: var(--term-bg);
  border: 1px solid var(--term-line);
  border-radius: 6px;
  color: var(--term-ink);
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-size: 0.82rem;
  line-height: 1.7;
  margin: 0 0 1.25rem;
  position: relative;
}
.md pre code { background: none; padding: 0; font-size: 1em; border-radius: 0; }
.md pre .copy-btn { position: absolute; top: 0.5rem; right: 0.6rem; margin: 0; }
.md blockquote {
  margin: 0 0 1rem;
  padding: 0.1rem 0 0.1rem 1rem;
  border-left: 2px solid var(--accent);
  color: var(--muted);
}
.md hr { border: none; border-top: 1px solid var(--line); margin: 2rem 0; }
.md table { margin: 0 0 1.25rem; }
.md .table-wrap { margin: 0 0 1.25rem; }
.md .table-wrap table { margin: 0; }
.md-status { color: var(--muted); font-family: var(--mono); font-size: 0.85rem; }

/* ---------- responsive ---------- */

@media (max-width: 56rem) {
  .hero .wrap { grid-template-columns: 1fr; gap: 2rem; }
  .hero .lede { max-width: 40rem; }
}

@media (max-width: 48rem) {
  .hero { padding: 3rem 0 2.5rem; }
  .features { grid-template-columns: 1fr; }
  .doc-list a { flex-direction: column; gap: 0.1rem; }
  .docs-layout { grid-template-columns: 1fr; gap: 1.5rem; padding-top: 1.5rem; }
  .sidebar { position: static; }
  .sidebar ul { display: flex; flex-wrap: wrap; gap: 0 1rem; }
  .sidebar a { border-left: none; padding-left: 0; }
  .sidebar a.active { text-decoration: underline; text-underline-offset: 4px; }
  .nav .wrap { flex-wrap: wrap; gap: 0.75rem 1.25rem; }
  .nav-links { margin-left: 0; }
}