/* ==========================================================================
   style.css — gaya halaman (aman diedit langsung).
   ✏️ Ganti warna brand cukup di :root di bawah (mis. --signal).
   Setelah mengedit file ini, naikkan angka ?v= pada <link rel="stylesheet"> di index.html
   (mis. style.css?v=1 → ?v=2) agar browser pengunjung memuat versi baru.

   "Panduan saku" — kertas, tinta, satu warna sinyal.
   Mobile-first. Satu font display (Archivo Expanded 800), sisanya font sistem.
   ========================================================================== */

:root {
  --paper: #f3efe6;
  --paper-2: #e8e2d4;
  --paper-3: #fbf9f4;
  --ink: #17160f;
  --ink-2: #34312a;
  --muted: #5f594c;
  --rule: #17160f;
  --rule-soft: #cbc3b1;
  --signal: #ff4f1a;
  --signal-deep: #d93a0b;
  --on-ink: #f3efe6;
  --on-ink-muted: #b9b2a2;

  --display: "Archivo", "Arial Black", "Helvetica Neue", system-ui, sans-serif;
  --body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono", Menlo, Consolas, monospace;

  --wrap: 76rem;
  --gutter: 1.25rem;
  --header-h: 3.75rem;
  --radius: 4px;
  color-scheme: light;
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1.25rem);
}

body {
  margin: 0;
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink-2);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: rgb(255 79 26 / 20%);
}

img,
svg { display: block; max-width: 100%; }
img { height: auto; }

h1,
h2,
h3 { color: var(--ink); margin: 0 0 0.6em; text-wrap: balance; }
h1,
h2 {
  font-family: var(--display);
  font-weight: 800;
  font-stretch: 125%;
  line-height: 1.02;
  letter-spacing: -0.025em;
}
h1 { font-size: clamp(2.05rem, 1.1rem + 3.9vw, 4.1rem); }
h2 { font-size: clamp(1.7rem, 1.2rem + 2.1vw, 2.9rem); }
h3 { font-size: 1.125rem; font-weight: 700; line-height: 1.3; letter-spacing: -0.005em; }
p { margin: 0 0 1em; }
ul,
ol { margin: 0; padding: 0; list-style: none; }
strong { color: var(--ink); }

a { color: var(--ink); text-decoration-color: var(--signal); text-decoration-thickness: 2px; text-underline-offset: 0.2em; }
a:hover { color: var(--signal-deep); }

code {
  font-family: var(--mono);
  font-size: 0.875em;
  background: var(--paper-3);
  border: 1px solid var(--rule-soft);
  padding: 0.05em 0.35em;
  border-radius: 3px;
  color: var(--ink);
}

:focus-visible { outline: 3px solid var(--signal); outline-offset: 3px; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

.ico {
  width: 1.15em;
  height: 1.15em;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: square;
  stroke-linejoin: miter;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -10rem;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  padding: 0.6rem 1rem;
  font-weight: 700;
}
.skip-link:focus { top: 1rem; color: var(--paper); }

/* ---------- Tombol ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  min-height: 3rem;
  padding: 0.75rem 1.3rem;
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  font: inherit;
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s, border-color 0.15s;
}
.btn .ico { transition: transform 0.2s; }
.btn:hover .ico { transform: translateX(3px); }
.btn-sm { min-height: 2.75rem; padding: 0.5rem 1rem; font-size: 0.9375rem; }
.btn-lg { min-height: 3.5rem; padding: 0.9rem 1.5rem; font-size: 1.0625rem; }

.btn-signal { background: var(--signal); color: var(--ink); }
.btn-signal:hover { background: var(--ink); color: var(--paper); }
.btn-ink { background: var(--ink); color: var(--paper); }
.btn-ink:hover { background: var(--paper); color: var(--ink); }
.btn-line { background: transparent; color: var(--ink); }
.btn-line:hover { background: var(--ink); color: var(--paper); }

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--signal);
  text-decoration-thickness: 2px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 2px solid var(--rule);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-right: auto;
  text-decoration: none;
  color: var(--ink);
}
.brand:hover { color: var(--ink); }
.brand img { display: block; height: 2.25rem; width: auto; flex: none; }
.logo-text {
  font-family: var(--display);
  font-weight: 800;
  font-stretch: 125%;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  line-height: 1;
}
.logo-sub {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-left: 0.15rem;
  color: var(--muted);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 2.75rem;
  padding: 0 0.85rem;
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  font-family: var(--mono);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  cursor: pointer;
}
.nav-toggle[aria-expanded="true"] { background: var(--ink); color: var(--paper); }
.nav-toggle-bars,
.nav-toggle-bars::before {
  display: block;
  width: 1rem;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s;
}
.nav-toggle-bars { position: relative; transform: translateY(-3px); }
.nav-toggle-bars::before { content: ""; position: absolute; left: 0; top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars { transform: translateY(0) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(-6px) rotate(-90deg); }

.header-cta { display: none; }

/* Panel menu mobile */
.site-nav {
  position: absolute;
  inset: 100% 0 auto;
  background: var(--paper);
  border-bottom: 2px solid var(--rule);
  padding: 0.25rem var(--gutter) 1rem;
  display: none;
  max-height: calc(100dvh - var(--header-h));
  overflow-y: auto;
}
.site-nav.is-open { display: block; }
.nav-list a {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--rule-soft);
  font-family: var(--display);
  font-weight: 800;
  font-stretch: 125%;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--ink);
}
.nav-no { font-family: var(--mono); font-size: 0.75rem; font-weight: 500; color: var(--muted); }

/* Tanpa JavaScript: menu tetap terlihat */
.no-js .nav-toggle { display: none; }
.no-js .header-inner { flex-wrap: wrap; }
.no-js .site-nav { position: static; display: block; width: 100%; border: 0; padding: 0 0 0.75rem; }

/* ---------- Hero ---------- */
.hero {
  background-color: var(--paper);
  background-image:
    linear-gradient(rgb(23 22 15 / 6%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(23 22 15 / 6%) 1px, transparent 1px);
  background-size: 28px 28px;
  background-position: -1px -1px;
  border-bottom: 2px solid var(--rule);
  padding: 2.25rem 0 0;
}
.hero-grid { display: grid; gap: 2rem; align-items: center; }
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 1.25rem;
}
.tag::before { content: ""; width: 0.75rem; height: 0.75rem; background: var(--signal); flex: none; }
.lead { font-size: 1.125rem; line-height: 1.6; max-width: 34rem; color: var(--ink-2); }
.hero-actions { display: grid; gap: 0.75rem; margin: 1.75rem 0 0; }
.hero-media { max-width: 28rem; width: 100%; margin-inline: auto; }

.index-strip {
  display: grid;
  margin-top: 2.5rem;
  border-top: 2px solid var(--rule);
  background: var(--paper);
}
.index-strip a {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--rule-soft);
  text-decoration: none;
  color: var(--ink);
  min-height: 3.5rem;
}
.index-strip li:last-child a { border-bottom: 0; }
.index-num {
  font-family: var(--display);
  font-weight: 800;
  font-stretch: 125%;
  font-size: 1.75rem;
  line-height: 1;
  min-width: 2.6ch;
}
.index-txt { flex: 1; font-weight: 600; }
.index-strip .ico { color: var(--signal-deep); }
.index-strip a:hover .index-txt { text-decoration: underline; text-decoration-color: var(--signal); text-decoration-thickness: 2px; }

/* ---------- Gambar (hero & konten) ---------- */
.media { margin: 0; }
.media img { display: block; width: 100%; height: auto; }

/* ---------- Seksi ---------- */
.section { padding: 4rem 0; }
.section-alt { background: var(--paper-2); border-block: 2px solid var(--rule); }
.section-ink { background: var(--ink); color: var(--on-ink-muted); }
.section-ink h2,
.section-ink h3,
.section-ink strong { color: var(--on-ink); }

.sec-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 1.25rem;
}
.sec-label::after { content: ""; flex: 1; height: 2px; background: currentColor; }
.sec-no { background: var(--ink); color: var(--paper); padding: 0.15rem 0.4rem; letter-spacing: 0.04em; }
.section-ink .sec-label { color: var(--on-ink); }
.section-ink .sec-no { background: var(--signal); color: var(--ink); }

.sec-head { margin-bottom: 2.25rem; }
.sec-intro { color: var(--muted); max-width: 36rem; }
.intro { font-size: 1.1875rem; line-height: 1.55; color: var(--ink); }
.section-ink .intro { color: var(--on-ink); }

.split { display: grid; gap: 2.5rem; align-items: center; }

/* ---------- 01 Ikhtisar ---------- */
.reasons { margin-top: 3rem; }
.reasons h3 { font-size: 1.25rem; margin-bottom: 1rem; }
.reason-list { border-top: 2px solid var(--rule); }
.reason-list li { padding: 1.1rem 0; border-bottom: 1px solid var(--rule-soft); }
.reason-list p { margin: 0; }
.reason-key {
  font-family: var(--display);
  font-weight: 800;
  font-stretch: 125%;
  font-size: 1.125rem;
  color: var(--ink);
  margin-bottom: 0.3rem !important;
}
.reason-key::before { content: ""; display: inline-block; width: 0.55rem; height: 0.55rem; background: var(--signal); margin-right: 0.55rem; vertical-align: 0.12em; }
.note {
  margin-top: 1.5rem;
  font-size: 0.9375rem;
  color: var(--muted);
  padding-left: 1rem;
  border-left: 3px solid var(--signal);
}

/* ---------- 02 Fitur (checklist) ---------- */
.checklist { background: var(--paper-3); border: 2px solid var(--rule); border-radius: var(--radius); }
.checklist-status {
  display: none;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem 0.75rem;
  margin: 0;
  padding: 0.9rem 1.1rem;
  border-bottom: 2px solid var(--rule);
  font-family: var(--mono);
  font-size: 0.8125rem;
  color: var(--ink);
}
.js .checklist-status { display: flex; }
.checklist-count { font-family: var(--display); font-weight: 800; font-stretch: 125%; font-size: 1.25rem; line-height: 1; }
.checklist-bar { flex: 1 0 100%; height: 6px; background: var(--paper-2); border: 1px solid var(--ink); }
.checklist-bar span { display: block; height: 100%; width: 0; background: var(--signal); transition: width 0.3s; }

.spec-row {
  display: grid;
  grid-template-columns: 2rem 1fr auto;
  gap: 0.25rem 0.85rem;
  align-items: start;
  padding: 1.15rem 1.1rem;
  border-bottom: 1px solid var(--rule-soft);
  transition: background-color 0.2s;
}
.spec-row:last-child { border-bottom: 0; }
.spec-row:has(input:checked) { background: rgb(255 79 26 / 7%); }
.spec-code {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border: 2px solid var(--ink);
  font-family: var(--mono);
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--ink);
}
.spec-body h3 { margin: 0.2rem 0 0.35rem; }
.spec-body p { margin: 0; font-size: 1rem; color: var(--muted); }

.spec-check { position: relative; display: grid; place-items: center; width: 2.75rem; height: 2.75rem; margin: -0.35rem -0.4rem 0 0; cursor: pointer; }
.spec-check input { position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; opacity: 0; cursor: pointer; }
.spec-check .box { width: 1.6rem; height: 1.6rem; border: 2px solid var(--ink); background: var(--paper); transition: background-color 0.15s; }
.spec-check input:checked + .box {
  background: var(--signal) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M5 12.5l4.5 4.5L19 7' fill='none' stroke='%2317160f' stroke-width='3.2'/%3E%3C/svg%3E") center/1.1rem no-repeat;
}
.spec-check input:focus-visible + .box { outline: 3px solid var(--signal); outline-offset: 3px; }

/* ---------- 03 Panduan ---------- */
.guide { display: grid; gap: 2.5rem; align-items: start; }
.steps { counter-reset: step; border-top: 2px solid var(--rule); }
.step {
  counter-increment: step;
  position: relative;
  padding: 1.4rem 0 1.4rem 4.25rem;
  border-bottom: 1px solid var(--rule-soft);
}
.step::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1.25rem;
  font-family: var(--display);
  font-weight: 800;
  font-stretch: 125%;
  font-size: 2rem;
  line-height: 1;
  color: var(--ink);
}
.step::after { content: ""; position: absolute; left: 0; top: 3.6rem; width: 2.6rem; height: 4px; background: var(--signal); }
.step h3 { margin-bottom: 0.35rem; font-size: 1.1875rem; }
.step p { margin: 0; color: var(--muted); }
.os-tips { display: grid; gap: 0.6rem; margin-top: 1rem; }
.os-tips p { margin: 0; padding: 0.8rem 0.95rem; border: 2px solid var(--ink); background: var(--paper-3); color: var(--ink-2); font-size: 0.9375rem; }
.os-name { display: block; font-family: var(--mono); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink); margin-bottom: 0.25rem; }
.guide-media { max-width: 26rem; width: 100%; margin-inline: auto; }

/* ---------- 04 Tips ---------- */
.tips { display: grid; border-top: 2px solid var(--rule); counter-reset: tip; }
.tip { counter-increment: tip; padding: 1.4rem 0; border-bottom: 1px solid var(--rule-soft); position: relative; }
.tip::before {
  content: "Tip " counter(tip, decimal-leading-zero);
  position: absolute;
  right: 0;
  top: 1.5rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
}
.tip > .ico { width: 1.75rem; height: 1.75rem; color: var(--ink); margin-bottom: 0.9rem; stroke-width: 1.8; }
.tip h3 { margin-bottom: 0.4rem; }
.tip p { margin: 0; font-size: 1rem; color: var(--muted); }

/* ---------- 05 Keamanan ---------- */
.section-ink h3 { margin-top: 2rem; }
.check-list { display: grid; gap: 0; border-top: 1px solid rgb(243 239 230 / 22%); }
.check-list li { position: relative; padding: 0.8rem 0 0.8rem 2rem; border-bottom: 1px solid rgb(243 239 230 / 22%); color: var(--on-ink); }
.check-list li::before { content: ""; position: absolute; left: 0; top: 1.25rem; width: 0.75rem; height: 0.75rem; background: var(--signal); }
.section-ink em { color: var(--on-ink); }

/* ---------- 06 FAQ ---------- */
.faq-layout { display: grid; gap: 2rem; }
.faq-list { border-top: 2px solid var(--rule); }
.faq-item { border-bottom: 1px solid var(--rule-soft); }
.faq-item summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 0;
  cursor: pointer;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover .faq-q { text-decoration: underline; text-decoration-color: var(--signal); text-decoration-thickness: 2px; text-underline-offset: 0.2em; }
.faq-q { font-size: 1.0625rem; margin: 0; padding-top: 0.2rem; }
.faq-icon { position: relative; flex: none; width: 2rem; height: 2rem; border: 2px solid var(--ink); background: var(--paper); transition: background-color 0.15s; }
.faq-icon::before,
.faq-icon::after { content: ""; position: absolute; left: 50%; top: 50%; width: 0.8rem; height: 2px; background: var(--ink); transform: translate(-50%, -50%); transition: transform 0.2s; }
.faq-icon::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq-item[open] .faq-icon { background: var(--signal); }
.faq-item[open] .faq-icon::after { transform: translate(-50%, -50%); }
.faq-a { padding: 0 3rem 1.25rem 0; }
.faq-a p { margin: 0; color: var(--muted); }

/* ---------- CTA ---------- */
.cta-band { background: var(--signal); color: var(--ink); padding: 3.5rem 0; border-top: 2px solid var(--rule); }
.cta-inner { display: grid; gap: 1.5rem; }
.cta-band h2 { font-size: clamp(2rem, 1.2rem + 3.4vw, 3.75rem); margin: 0; }
.cta-side p { color: var(--ink); max-width: 30rem; }
.cta-side .btn { width: 100%; margin: 0.25rem 0 1rem; }
.cta-note { font-family: var(--mono); font-size: 0.75rem; margin: 0; }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: var(--on-ink-muted); padding: 3rem 0 6rem; font-size: 0.9375rem; }
.site-footer .brand { color: var(--on-ink); }
.site-footer .logo-sub { color: var(--on-ink-muted); }
.site-footer .brand img { box-sizing: content-box; padding: 0.35rem; background: var(--paper); border-radius: var(--radius); }
.footer-grid { display: grid; gap: 2rem; }
.footer-brand p { margin-top: 1rem; max-width: 22rem; }
.footer-title { font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--on-ink); margin-bottom: 0.75rem; }
.footer-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 1rem; }
.footer-links a { display: block; padding: 0.4rem 0; }
.site-footer a { color: var(--on-ink); text-decoration: none; }
.site-footer a:hover { color: var(--signal); }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgb(243 239 230 / 20%);
  font-family: var(--mono);
  font-size: 0.8125rem;
}
.footer-bottom p { margin: 0; }
.to-top { display: inline-flex; align-items: center; gap: 0.4rem; min-height: 2.75rem; }

/* ---------- Dock CTA mobile ---------- */
.dock {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem var(--gutter) calc(0.6rem + env(safe-area-inset-bottom));
  background: var(--paper);
  border-top: 2px solid var(--rule);
  transform: translateY(110%);
  visibility: hidden;
  transition: transform 0.25s ease, visibility 0s linear 0.25s;
}
.dock.is-visible { transform: none; visibility: visible; transition: transform 0.25s ease, visibility 0s; }
.dock-text { margin: 0; font-family: var(--mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); line-height: 1.3; }
.dock-brand { display: block; font-family: var(--display); font-weight: 800; font-stretch: 125%; font-size: 0.95rem; text-transform: none; letter-spacing: 0; color: var(--ink); }

/* ---------- Peringatan konfigurasi (muncul hanya bila masih ada placeholder) ---------- */
.cek-config {
  position: fixed;
  left: 1rem;
  right: 1rem;
  top: 1rem;
  z-index: 200;
  max-width: 34rem;
  margin-inline: auto;
  padding: 1rem 1.1rem;
  background: #fff4d6;
  color: var(--ink);
  border: 2px solid var(--ink);
  box-shadow: 6px 6px 0 var(--ink);
  font-size: 0.9375rem;
  line-height: 1.5;
}
.cek-config strong { display: block; margin-bottom: 0.4rem; }
.cek-config ul { list-style: disc; padding-left: 1.25rem; margin: 0 0 0.75rem; }
.cek-config code { background: #fff; }
.cek-config button { font: inherit; font-weight: 700; padding: 0.4rem 0.8rem; border: 2px solid var(--ink); background: var(--ink); color: var(--paper); cursor: pointer; }

/* ---------- Gerak ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

/* ==========================================================================
   ≥ 640px
   ========================================================================== */
@media (min-width: 40em) {
  :root { --gutter: 2rem; }
  .hero-actions { display: flex; flex-wrap: wrap; }
  .index-strip { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .index-strip a { padding: 1.1rem 1.25rem 1.1rem 0; border-bottom: 0; }
  .index-strip li + li a { border-left: 1px solid var(--rule-soft); padding-left: 1.25rem; }
  .reason-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .reason-list li { padding: 1.25rem 1.25rem 1.25rem 0; }
  .reason-list li + li { border-left: 1px solid var(--rule-soft); padding-left: 1.25rem; }
  .os-tips { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tips { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tip { padding: 1.5rem 1.5rem 1.5rem 0; }
  .tip:nth-child(2n) { border-left: 1px solid var(--rule-soft); padding-left: 1.5rem; }
  .tip::before { right: 1.5rem; }
  .tip:nth-child(2n)::before { right: 0; }
  .spec-row { grid-template-columns: 2.5rem minmax(0, 14rem) 1fr auto; gap: 1.25rem; align-items: center; padding: 1.25rem 1.5rem; }
  .spec-code { width: 2.5rem; height: 2.5rem; }
  .spec-body { display: contents; }
  .spec-body h3 { margin: 0; }
  .spec-check { margin: 0; }
  .checklist-status { padding: 1rem 1.5rem; }
  .checklist-bar { flex: 0 1 14rem; margin-left: auto; }
  .cta-side .btn { width: auto; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .header-cta { display: inline-flex; }
}

/* ==========================================================================
   ≥ 960px
   ========================================================================== */
@media (min-width: 60em) {
  :root { --header-h: 4.25rem; }
  .dock { display: none; }
  .site-footer { padding-bottom: 2rem; }

  .hero { padding-top: 4rem; }
  .hero-grid { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 3.5rem; }
  .hero-media { max-width: none; }
  .index-strip { margin-top: 3.5rem; }

  .section { padding: 6.5rem 0; }
  .sec-head-row { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 3.5rem; align-items: end; }
  .sec-head-row .sec-intro { margin-bottom: 0.6em; }
  .split { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 4.5rem; }
  .section-ink .split { grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); }

  .guide { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 4.5rem; }
  .guide-media { position: sticky; top: calc(var(--header-h) + 2rem); max-width: none; }
  .step { padding-left: 6rem; }
  .step::before { font-size: 2.75rem; }
  .step::after { top: 4.4rem; width: 3.5rem; }

  .tips { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .tip,
  .tip:nth-child(2n) { padding: 1.75rem 1.5rem 1.75rem 0; border-left: 0; border-bottom: 0; }
  .tip + .tip { border-left: 1px solid var(--rule-soft); padding-left: 1.5rem; }
  .tip::before,
  .tip:nth-child(2n)::before { right: 1.5rem; top: 1.85rem; }
  .tip:last-child::before { right: 0; }

  .faq-layout { grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); gap: 4.5rem; align-items: start; }
  .faq-aside { position: sticky; top: calc(var(--header-h) + 2rem); }

  .cta-band { padding: 5.5rem 0; }
  .cta-inner { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 4rem; align-items: end; }

  .footer-grid { grid-template-columns: 1.4fr 1fr 1.4fr; gap: 3rem; }
}

/* ==========================================================================
   ≥ 1152px — navigasi penuh di header
   ========================================================================== */
@media (min-width: 72em) {
  .nav-toggle { display: none; }
  .brand { margin-right: 0; }
  .site-nav,
  .no-js .site-nav {
    position: static;
    display: block;
    width: auto;
    margin: 0 auto;
    padding: 0;
    border: 0;
    max-height: none;
    overflow: visible;
    background: none;
  }
  .no-js .header-inner { flex-wrap: nowrap; }
  .nav-list { display: flex; gap: 0.25rem; }
  .nav-list a {
    gap: 0.35rem;
    padding: 0.5rem 0.6rem;
    border: 0;
    font-family: var(--body);
    font-weight: 600;
    font-stretch: normal;
    font-size: 0.9375rem;
    text-decoration: none;
  }
  .nav-list a:hover { color: var(--ink); text-decoration: underline; text-decoration-color: var(--signal); text-decoration-thickness: 2px; text-underline-offset: 0.35em; }
  .nav-list a[aria-current="true"] { box-shadow: inset 0 -3px 0 var(--signal); }
  .nav-no { font-size: 0.6875rem; }
}

@media print {
  .site-header,
  .hero-actions,
  .dock,
  .cta-band { display: none; }
  .hero { background: none; }
}