:root {
  --bg: #f3f6f4;
  --bg-elev: #eaf0ec;
  --card: #ffffff;
  --card-alt: #f7faf8;
  --text: #0e1a13;
  --muted: #53635a;
  --line: #dce5df;
  --green: #16a34a;
  --green-bright: #22c55e;
  --green-soft: #dcf7e5;
  --on-green: #04140a;
  --blue: #2563eb;
  --blue-soft: #dbeafe;
  --amber: #b45309;
  --amber-soft: #fef3c7;
  --red: #dc2626;
  --red-soft: #fee2e2;
  --purple: #7c3aed;
  --purple-soft: #ede9fe;
  --shadow: 0 12px 32px rgba(8, 24, 14, .08);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #080d0a;
    --bg-elev: #0e1611;
    --card: #121b16;
    --card-alt: #17231c;
    --text: #f3f7f4;
    --muted: #98a89f;
    --line: #223029;
    --green: #2bd45f;
    --green-bright: #39e26b;
    --green-soft: #11351e;
    --on-green: #04140a;
    --blue: #60a5fa;
    --blue-soft: #13253e;
    --amber: #fbbf24;
    --amber-soft: #352708;
    --red: #f87171;
    --red-soft: #381515;
    --purple: #a78bfa;
    --purple-soft: #261a42;
    --shadow: 0 16px 40px rgba(0, 0, 0, .48);
  }
}

:root[data-theme="dark"] {
  --bg: #080d0a;
  --bg-elev: #0e1611;
  --card: #121b16;
  --card-alt: #17231c;
  --text: #f3f7f4;
  --muted: #98a89f;
  --line: #223029;
  --green: #2bd45f;
  --green-bright: #39e26b;
  --green-soft: #11351e;
  --on-green: #04140a;
  --blue: #60a5fa;
  --blue-soft: #13253e;
  --amber: #fbbf24;
  --amber-soft: #352708;
  --red: #f87171;
  --red-soft: #381515;
  --purple: #a78bfa;
  --purple-soft: #261a42;
  --shadow: 0 16px 40px rgba(0, 0, 0, .48);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 78px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--green); }
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
}

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 18px; }
.wrap-wide { max-width: 1320px; margin: 0 auto; padding: 0 18px; }
.wrap-narrow { max-width: 840px; margin: 0 auto; padding: 0 18px; }

/* Unified Sticky Navbar */
nav.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
  margin-right: auto;
}
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.brand .tag {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--green-soft);
  color: var(--green);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14.5px;
  font-weight: 600;
  padding: 7px 11px;
  border-radius: 10px;
  white-space: nowrap;
  transition: background .15s, color .15s;
}
.nav-links a:hover { color: var(--text); background: var(--bg-elev); }
.nav-links a.active { color: var(--green); background: var(--green-soft); }

.nav-actions { display: flex; align-items: center; gap: 8px; }
.icon-btn {
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text);
  border-radius: 10px;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  cursor: pointer;
  font-size: 16px;
}
.icon-btn:hover { border-color: var(--green); }
.menu-toggle { display: none; }

@media (max-width: 860px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--card);
    border-bottom: 1px solid var(--line);
    padding: 12px 18px;
    box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
  .menu-toggle { display: grid; }
}

/* Search Bar (Guide) */
.search-wrap {
  flex: 1;
  max-width: 340px;
  position: relative;
}
.search-wrap input {
  width: 100%;
  padding: 8px 32px;
  border-radius: 11px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text);
  font: inherit;
  font-size: 14px;
  outline: none;
}
.search-wrap input:focus { border-color: var(--green); }
.search-wrap .s-ico {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-size: 14px;
  pointer-events: none;
}
.search-wrap button.clear-q {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: 0;
  color: var(--muted);
  cursor: pointer;
  display: none;
  font-size: 15px;
}
@media (max-width: 640px) {
  .brand .tag { display: none; }
  .search-wrap { max-width: 190px; }
}

/* Shared Hero */
.site-hero {
  background: radial-gradient(ellipse at top, rgba(34, 197, 94, .22), transparent 68%);
  border-bottom: 1px solid var(--line);
  padding: 48px 0 40px;
}
.site-hero.center { text-align: center; }
.site-hero h1 {
  font-size: clamp(28px, 4.8vw, 48px);
  line-height: 1.12;
  margin: 12px 0;
}
.site-hero h1 span { color: var(--green); }
.site-hero p.lead { color: var(--muted); font-size: 18px; max-width: 660px; margin: 0 auto; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips.center { justify-content: center; margin-top: 20px; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--green-soft);
  color: var(--green);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 13.5px;
  font-weight: 600;
}
.chip.blue { background: var(--blue-soft); color: var(--blue); }
.chip.amber { background: var(--amber-soft); color: var(--amber); }
.chip.purple { background: var(--purple-soft); color: var(--purple); }
.chip.red { background: var(--red-soft); color: var(--red); }

.cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.cta.center { justify-content: center; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 14px;
  font-weight: 700;
  text-decoration: none;
  font-size: 15.5px;
  transition: transform .12s, opacity .12s;
}
.btn:hover { transform: translateY(-1px); }
.btn.primary { background: var(--green-bright); color: var(--on-green); }
.btn.ghost { border: 1px solid var(--line); color: var(--text); background: var(--card); }

/* Landing Sections */
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 30px;
  align-items: center;
}
@media (max-width: 920px) { .hero-grid { grid-template-columns: 1fr; text-align: center; } .hero-grid .cta, .hero-grid .chips { justify-content: center; } }
.hero-media {
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: var(--card);
}
.hero-media img { width: 100%; display: block; cursor: zoom-in; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 12px; margin: 28px 0 8px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 18px; text-align: center; }
.stat b { display: block; font-size: 28px; color: var(--green); }
.stat span { color: var(--muted); font-size: 14px; }

section.block { padding: 42px 0; }
section.block h2 { font-size: clamp(24px, 3.5vw, 32px); text-align: center; margin: 0 0 8px; }
section.block p.sub { text-align: center; color: var(--muted); margin: 0 auto 28px; max-width: 640px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 14px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 22px; }
.card .ico {
  width: 46px; height: 46px; border-radius: 50%; display: grid; place-items: center;
  background: var(--green-soft); font-size: 22px; margin-bottom: 12px;
}
.card h3 { margin: 0 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

/* Screenshots Showcase Strip */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px;
}
figure.shot {
  margin: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 9px;
  box-shadow: 0 4px 16px rgba(0,0,0,.04);
}
figure.shot img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
  cursor: zoom-in;
  border: 1px solid var(--line);
}
figure.shot.phone img { max-width: 265px; margin: 0 auto; }
figure.shot figcaption {
  font-size: 13.5px;
  color: var(--muted);
  text-align: center;
  line-height: 1.45;
}
figure.shot figcaption b { color: var(--text); }
figure.shot figcaption a.more { display: inline-block; margin-top: 4px; font-weight: 600; text-decoration: none; font-size: 12.5px; }

.steps { counter-reset: s; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 22px; position: relative; }
.step::before {
  counter-increment: s; content: counter(s); position: absolute; top: -14px; left: 20px;
  width: 30px; height: 30px; border-radius: 50%; background: var(--green-bright); color: var(--on-green);
  display: grid; place-items: center; font-weight: 800;
}
.step h3 { margin: 6px 0 6px; font-size: 17px; }
.step p { margin: 0; color: var(--muted); font-size: 15px; }

.note {
  background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--amber);
  border-radius: 16px; padding: 18px 20px; color: var(--muted);
}
.note b { color: var(--text); }

details { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 16px 20px; margin: 10px 0; }
summary { cursor: pointer; font-weight: 700; }
details p { color: var(--muted); margin: 10px 0 0; }

.contact-box {
  text-align: center;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 36px 20px;
  background-image: radial-gradient(ellipse at top, rgba(34,197,94,.18), transparent 70%);
}
.contact-box h2 { margin: 0 0 6px; }
.contact-box p { color: var(--muted); margin: 0 0 18px; }

/* Legal / Doc Pages (Privacy & Terms) */
main.doc-page { padding: 24px 18px 56px; max-width: 840px; margin: 0 auto; }
main.doc-page section {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 22px 24px;
  margin: 14px 0;
}
main.doc-page h2 { margin: 0 0 10px; font-size: 20px; display: flex; align-items: center; gap: 10px; }
main.doc-page h2 .ico { font-size: 22px; }
main.doc-page ul { padding-left: 22px; margin: 8px 0; }
main.doc-page li { margin: 6px 0; }
main.doc-page section.summary { border-color: var(--green); }
main.doc-page section.warn { border-color: var(--red); background: linear-gradient(var(--red-soft), var(--card) 70%); }
main.doc-page .pill-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; margin-top: 10px; }
main.doc-page .pill { border: 1px solid var(--line); border-radius: 14px; padding: 12px 14px; }
main.doc-page .pill b { display: block; }
main.doc-page .pill span { color: var(--muted); font-size: 14px; }
main.doc-page section.notice { border: 2px solid var(--green); background: var(--green-soft); }
main.doc-page section.notice.amber { border-color: var(--amber); background: var(--amber-soft); }
main.doc-page section.notice h2 { font-size: 19px; }

/* Guide Layout */
.layout {
  max-width: 1320px; margin: 0 auto; padding: 24px 18px 64px;
  display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 28px; align-items: start;
}
@media (max-width: 1020px) { .layout { grid-template-columns: 1fr; } }

aside.toc {
  position: sticky; top: 82px;
  background: var(--card); border: 1px solid var(--line); border-radius: 18px;
  padding: 16px; max-height: calc(100vh - 100px); overflow-y: auto;
}
aside.toc h3 {
  margin: 0 0 10px; font-size: 12px; text-transform: uppercase; letter-spacing: .07em; color: var(--muted);
}
aside.toc a {
  display: flex; align-items: center; gap: 8px; padding: 7px 10px; border-radius: 10px;
  text-decoration: none; color: var(--muted); font-size: 13.5px; font-weight: 600;
}
aside.toc a:hover, aside.toc a.active { background: var(--green-soft); color: var(--green); }
aside.toc .sub { padding-left: 26px; font-size: 12.5px; font-weight: 500; }
@media (max-width: 1020px) {
  aside.toc { position: static; max-height: none; display: flex; flex-wrap: wrap; gap: 6px; padding: 12px; }
  aside.toc h3 { width: 100%; margin-bottom: 4px; }
  aside.toc a.sub { display: none; }
}

.search-status {
  display: none; margin-bottom: 16px; padding: 12px 16px; border-radius: 14px;
  background: var(--card); border: 1px solid var(--green); font-weight: 600;
}
section.chapter { margin-bottom: 36px; scroll-margin-top: 80px; }
.chapter-head {
  display: flex; align-items: center; gap: 12px; margin-bottom: 14px;
  padding-bottom: 10px; border-bottom: 2px solid var(--line);
}
.chapter-num {
  width: 36px; height: 36px; border-radius: 11px; display: grid; place-items: center;
  background: var(--green-bright); color: var(--on-green); font-weight: 800; font-size: 16px; flex-shrink: 0;
}
.chapter-head h2 { margin: 0; font-size: clamp(21px, 3vw, 27px); line-height: 1.2; }
.chapter-lead { color: var(--muted); margin: 0 0 18px; }
.gallery-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin: 16px 0 22px; }

.split {
  display: grid; grid-template-columns: minmax(0, 1fr) 265px; gap: 20px; align-items: start;
  background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 20px;
  margin: 14px 0 20px;
}
.split.reverse { grid-template-columns: 265px minmax(0, 1fr); }
@media (max-width: 760px) { .split, .split.reverse { grid-template-columns: 1fr; } }
.split .shot { border: 0; padding: 0; box-shadow: none; background: transparent; }

.option-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 14px; margin: 14px 0; }
.opt-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 18px;
  padding: 18px 20px; display: flex; flex-direction: column; gap: 10px;
}
.opt-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.opt-head h3 { margin: 0; font-size: 17px; line-height: 1.3; }
.badge {
  font-size: 11.5px; font-weight: 700; padding: 3px 9px; border-radius: 999px; white-space: nowrap;
  background: var(--bg-elev); color: var(--muted); border: 1px solid var(--line);
}
.badge.on { background: var(--green-soft); color: var(--green); border-color: transparent; }
.badge.off { background: var(--card-alt); color: var(--muted); }
.badge.opt { background: var(--blue-soft); color: var(--blue); border-color: transparent; }
.badge.warn { background: var(--amber-soft); color: var(--amber); border-color: transparent; }
.opt-card p { margin: 0; color: var(--muted); font-size: 14.5px; }
.opt-card ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 14px; }
.opt-card li { margin: 4px 0; }
.use-case {
  background: var(--card-alt); border: 1px solid var(--line); border-left: 3px solid var(--green);
  border-radius: 10px; padding: 10px 12px; font-size: 13.8px; margin-top: auto;
}
.use-case b { color: var(--green); display: block; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; margin-bottom: 2px; }

.callout {
  border-radius: 16px;
  padding: 14px 18px;
  margin: 14px 0;
  border: 1px solid var(--line);
  background: var(--card);
}
.callout.warn { border-left: 4px solid var(--amber); background: color-mix(in srgb, var(--amber-soft) 35%, var(--card)); }
.callout.info { border-left: 4px solid var(--blue); background: color-mix(in srgb, var(--blue-soft) 35%, var(--card)); }
.callout.good { border-left: 4px solid var(--green); background: color-mix(in srgb, var(--green-soft) 35%, var(--card)); }
.callout b.title { display: block; margin-bottom: 4px; }

.table-wrap { overflow-x: auto; margin: 14px 0; border: 1px solid var(--line); border-radius: 16px; background: var(--card); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: var(--card-alt); font-weight: 700; font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: .03em; }
tr:last-child td { border-bottom: 0; }

.flow { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 18px; margin: 14px 0; overflow-x: auto; }
.flow-steps { display: flex; align-items: stretch; gap: 10px; min-width: 680px; }
.flow-box { flex: 1; background: var(--card-alt); border: 1px solid var(--line); border-radius: 14px; padding: 12px; }
.flow-box b { display: block; font-size: 14px; margin-bottom: 4px; color: var(--green); }
.flow-box span { font-size: 13px; color: var(--muted); display: block; }
.flow-arrow { display: grid; place-items: center; font-weight: 800; color: var(--green); font-size: 20px; }

/* Lightbox */
.lightbox {
  position: fixed; inset: 0; z-index: 100; background: rgba(0, 0, 0, .88);
  display: none; align-items: center; justify-content: center; padding: 20px;
}
.lightbox.open { display: flex; }
.lightbox img { max-width: 95vw; max-height: 88vh; border-radius: 14px; box-shadow: 0 20px 60px rgba(0,0,0,.7); }
.lightbox .cap {
  position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%);
  background: rgba(18, 27, 22, .92); color: #fff; padding: 8px 16px; border-radius: 999px;
  font-size: 13.5px; max-width: 90vw; text-align: center;
}
.lightbox .close-lb {
  position: fixed; top: 16px; right: 20px; width: 42px; height: 42px; border-radius: 50%;
  border: 0; background: rgba(255,255,255,.15); color: #fff; font-size: 22px; cursor: pointer;
}

.hidden-by-search { display: none !important; }

/* Unified Footer */
footer.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  padding: 30px 18px 48px;
  border-top: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg-elev) 45%, transparent);
}
footer.site-footer a { color: var(--muted); text-decoration: none; font-weight: 600; }
footer.site-footer a:hover { color: var(--green); }