:root {
  --navy: #10283e;
  --navy-2: #173b57;
  --teal: #18cfd8;
  --teal-dark: #087f89;
  --gold: #f2b544;
  --ink: #172331;
  --muted: #69747d;
  --paper: #f6f8f8;
  --line: #dce8ea;
  --success: #277a4e;
  --success-bg: #eaf6ef;
  --warning-bg: #fff7e3;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body { margin: 0; color: var(--ink); background: #fff; font-family: Arial, Helvetica, sans-serif; }
a { color: inherit; }
button, input { font: inherit; }

.site-header {
  position: sticky; top: 0; z-index: 20; min-height: 76px; padding: 0 5vw;
  display: flex; align-items: center; justify-content: space-between; gap: 32px;
  background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(16px);
}
.brand { display: inline-flex; align-items: baseline; text-decoration: none; color: var(--navy); font-weight: 900; letter-spacing: -.04em; }
.brand strong { color: var(--teal); }
.brand small { margin-left: 13px; padding-left: 13px; border-left: 1px solid var(--line); color: var(--muted); font-size: .72rem; font-weight: 700; letter-spacing: .04em; }
.site-header nav { display: flex; align-items: center; gap: 26px; }
.site-header nav a { font-size: .9rem; font-weight: 700; text-decoration: none; }
.site-header nav a:not(.app-link):hover { color: var(--teal-dark); }
.app-link, .button.primary { background: var(--navy); color: #fff; }
.app-link { padding: 12px 17px; border-radius: 12px; }
.menu-toggle { display: none; border: 0; background: transparent; font-size: 1.55rem; color: var(--navy); }

.hero { min-height: 650px; padding: 96px 7vw 88px; display: grid; grid-template-columns: minmax(0,1.25fr) minmax(320px,.75fr); align-items: center; gap: 7vw; background: linear-gradient(135deg,#f8fbfb 0%,#fff 56%,#e9fafb 100%); border-bottom: 1px solid var(--line); }
.kicker { margin: 0 0 16px; color: var(--teal-dark); font-size: .76rem; font-weight: 900; letter-spacing: .16em; }
.hero h1 { max-width: 850px; margin: 0; color: var(--navy); font-size: clamp(3rem,6vw,6.2rem); line-height: .98; letter-spacing: -.055em; }
.hero h1 em { display: block; color: var(--teal-dark); font-style: normal; }
.hero-copy > p:not(.kicker) { max-width: 720px; margin: 28px 0 0; color: var(--muted); font-size: 1.17rem; line-height: 1.7; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button { padding: 15px 20px; border-radius: 13px; font-size: .94rem; font-weight: 800; text-decoration: none; }
.button.secondary { color: var(--navy); background: #fff; border: 1px solid var(--line); }
.golden-rule { padding: 34px; border-radius: 30px; color: #fff; background: var(--navy); box-shadow: 0 30px 70px rgba(16,40,62,.18); }
.golden-rule > span { color: var(--teal); font-size: .75rem; font-weight: 900; letter-spacing: .16em; }
.golden-rule ol { margin: 25px 0 0; padding: 0; list-style: none; counter-reset: steps; }
.golden-rule li { position: relative; padding: 18px 0 18px 54px; border-top: 1px solid rgba(255,255,255,.13); }
.golden-rule li::before { counter-increment: steps; content: counter(steps); position: absolute; left: 0; top: 18px; width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; color: var(--navy); background: var(--teal); font-weight: 900; }
.golden-rule li b, .golden-rule li small { display: block; }
.golden-rule li small { margin-top: 4px; color: #bdccd7; }

.setup-section, .manual-section, .help-section { padding: 100px 7vw; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 38px; }
.section-heading h2 { margin: 0; color: var(--navy); font-size: clamp(2.1rem,4vw,4.2rem); letter-spacing: -.045em; }
.section-heading p:not(.kicker) { max-width: 690px; color: var(--muted); line-height: 1.65; }
.progress-chip { padding: 11px 15px; border-radius: 999px; color: var(--navy); background: #e7f9fa; font-size: .86rem; font-weight: 900; white-space: nowrap; }
.setup-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; }
.setup-card { position: relative; min-height: 230px; padding: 62px 24px 25px; border: 1px solid var(--line); border-radius: 20px; background: #fff; box-shadow: 0 10px 30px rgba(16,40,62,.05); }
.setup-card .checkbox { position: absolute; left: 23px; top: 20px; color: var(--teal-dark); font-size: 1.75rem; }
.setup-card small { color: var(--teal-dark); font-weight: 900; letter-spacing: .12em; }
.setup-card h3 { margin: 13px 0 10px; color: var(--navy); font-size: 1.25rem; }
.setup-card p { margin: 0; color: var(--muted); line-height: 1.55; }
.success-strip { margin-top: 18px; padding: 18px 22px; border-left: 4px solid var(--success); color: #245c40; background: var(--success-bg); border-radius: 3px 14px 14px 3px; line-height: 1.55; }

.manual-section { display: grid; grid-template-columns: 300px minmax(0,1fr); gap: 48px; background: var(--paper); }
.manual-index { position: sticky; top: 108px; align-self: start; max-height: calc(100vh - 128px); overflow: auto; padding: 27px; border-radius: 22px; background: var(--navy); color: #fff; }
.manual-index h2 { margin: 0; font-size: 2rem; }
.manual-index > p:not(.kicker) { color: #bfcdd8; line-height: 1.5; }
.search-box { display: block; margin: 25px 0; }
.search-box span { display: block; margin-bottom: 8px; color: #bfcdd8; font-size: .76rem; font-weight: 800; }
.search-box input { width: 100%; padding: 13px; border: 1px solid rgba(255,255,255,.14); border-radius: 11px; background: #fff; color: var(--ink); outline: none; }
.search-box input:focus { box-shadow: 0 0 0 3px var(--teal); }
.manual-index nav { display: grid; }
.manual-index nav a { padding: 12px 0; border-top: 1px solid rgba(255,255,255,.12); color: var(--teal); font-size: .7rem; font-weight: 900; text-decoration: none; }
.manual-index nav span { display: block; margin-top: 4px; color: #fff; font-size: .88rem; font-weight: 700; }
.guide-list { min-width: 0; display: grid; gap: 28px; }
.search-result { margin: 0; color: var(--muted); }
.guide-card { overflow: hidden; border: 1px solid var(--line); border-radius: 24px; background: #fff; scroll-margin-top: 100px; }
.guide-card > header { padding: 35px 40px 28px; border-bottom: 1px solid var(--line); }
.guide-card > header span { color: var(--teal-dark); font-size: .75rem; font-weight: 900; letter-spacing: .12em; }
.guide-card > header h2 { margin: 10px 0 11px; color: var(--navy); font-size: clamp(1.8rem,3.6vw,3.3rem); letter-spacing: -.04em; }
.guide-card > header p { max-width: 780px; margin: 0; color: var(--muted); font-size: 1.04rem; line-height: 1.65; }
.guide-body { display: grid; grid-template-columns: minmax(0,1.25fr) minmax(260px,.75fr); gap: 35px; padding: 34px 40px 42px; }
.guide-body h3 { margin: 0 0 20px; color: var(--navy); font-size: 1.16rem; }
.instruction-list { display: grid; gap: 15px; margin: 0; padding: 0; list-style: none; }
.instruction-list li { display: grid; grid-template-columns: 34px 1fr; gap: 12px; align-items: start; }
.instruction-list li > span { width: 30px; height: 30px; display: grid; place-items: center; color: var(--navy); background: var(--teal); border-radius: 50%; font-size: .78rem; font-weight: 900; }
.instruction-list p { margin: 3px 0 0; line-height: 1.55; }
.guide-body aside { display: grid; align-content: start; gap: 12px; }
.result-box, .warning-box { padding: 20px; border-radius: 14px; }
.result-box { border-left: 4px solid var(--success); background: var(--success-bg); }
.warning-box { border-left: 4px solid var(--gold); background: var(--warning-bg); }
.result-box span, .warning-box span { color: var(--navy); font-size: .72rem; font-weight: 900; letter-spacing: .1em; }
.result-box p, .warning-box p { margin: 8px 0 0; line-height: 1.5; }
.media-block { display: grid; grid-template-columns: minmax(0,1.35fr) minmax(270px,.65fr); gap: 26px; padding: 32px 40px; background: #f2f7f7; border-bottom: 1px solid var(--line); }
.media-block > img { width: 100%; border-radius: 16px; border: 1px solid var(--line); }
.video-copy > span { color: var(--teal-dark); font-size: .74rem; font-weight: 900; letter-spacing: .1em; }
.video-copy h3 { margin: 10px 0 8px; color: var(--navy); font-size: 1.55rem; }
.video-copy p { margin: 0 0 18px; color: var(--muted); line-height: 1.55; }
.video-copy video { display: block; width: min(100%,280px); max-height: 480px; margin: 0 auto; border-radius: 18px; background: #081a29; }
.privacy-note { display: block; margin-top: 14px; color: var(--muted); font-size: .74rem; line-height: 1.45; }
.empty-search { padding: 50px; text-align: center; border: 1px dashed #b9c9cb; border-radius: 20px; color: var(--muted); background: #fff; }

.videos-section { padding: 100px 7vw; color: #fff; background: var(--navy); }
.section-heading.light h2 { color: #fff; }
.section-heading.light p:not(.kicker) { color: #bac9d4; }
.video-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 12px; }
.video-grid article { display: grid; grid-template-columns: 48px 1fr auto; align-items: center; gap: 18px; padding: 19px; border: 1px solid rgba(255,255,255,.12); border-radius: 15px; background: rgba(255,255,255,.04); }
.video-grid article > span { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 10px; color: var(--navy); background: #d4dee3; font-weight: 900; }
.video-grid article.available > span { background: var(--teal); }
.video-grid h3 { margin: 0; font-size: 1rem; }
.video-grid p { margin: 5px 0 0; color: #b8c8d2; font-size: .82rem; }
.video-grid a, .video-grid em { font-size: .76rem; font-weight: 900; font-style: normal; }
.video-grid a { color: var(--teal); }
.video-grid em { color: #91a5b4; }

.help-table { border: 1px solid var(--line); border-radius: 20px; overflow: hidden; }
.help-table article { display: grid; grid-template-columns: 1fr 1fr 1fr; }
.help-table article + article { border-top: 1px solid var(--line); }
.help-table article:nth-child(even) { background: var(--paper); }
.help-table div { padding: 22px; }
.help-table div + div { border-left: 1px solid var(--line); }
.help-table small { display: block; margin-bottom: 8px; color: var(--teal-dark); font-size: .68rem; font-weight: 900; letter-spacing: .09em; }
.help-table b { color: var(--navy); }
.help-table p { margin: 0; line-height: 1.5; }

footer { padding: 36px 7vw; display: flex; align-items: center; justify-content: space-between; gap: 28px; color: #c1d0da; background: #091c2c; font-size: .85rem; }
footer .brand { color: #fff; }
footer p { margin: 0; }
footer p a { color: var(--teal); font-weight: 800; }
footer > a { color: #fff; font-weight: 800; }

@media (max-width: 1050px) {
  .site-header nav { gap: 14px; }
  .setup-grid { grid-template-columns: repeat(2,1fr); }
  .manual-section { grid-template-columns: 250px minmax(0,1fr); gap: 25px; }
  .guide-body, .media-block { grid-template-columns: 1fr; }
}

@media (max-width: 780px) {
  html { scroll-padding-top: 72px; }
  .site-header { min-height: 68px; }
  .menu-toggle { display: block; }
  .site-header nav { position: absolute; left: 0; right: 0; top: 68px; display: none; padding: 18px 5vw 25px; flex-direction: column; align-items: stretch; background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 18px 35px rgba(16,40,62,.12); }
  .site-header nav.open { display: flex; }
  .site-header nav a { padding: 8px; }
  .hero { min-height: auto; padding: 70px 6vw; grid-template-columns: 1fr; }
  .hero h1 { font-size: clamp(2.75rem,13vw,4.4rem); }
  .setup-section, .manual-section, .help-section, .videos-section { padding: 70px 5vw; }
  .section-heading { align-items: start; flex-direction: column; }
  .manual-section { display: block; }
  .manual-index { position: static; max-height: none; margin-bottom: 25px; }
  .manual-index nav { grid-template-columns: 1fr 1fr; gap: 0 14px; }
  .guide-card > header, .guide-body, .media-block { padding-left: 22px; padding-right: 22px; }
  .video-grid { grid-template-columns: 1fr; }
  .help-table { border: 0; display: grid; gap: 12px; overflow: visible; }
  .help-table article { grid-template-columns: 1fr; border: 1px solid var(--line); border-radius: 15px; overflow: hidden; }
  .help-table article + article { border-top: 1px solid var(--line); }
  .help-table div + div { border-left: 0; border-top: 1px solid var(--line); }
  footer { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 520px) {
  .brand small { display: none; }
  .hero-actions { display: grid; }
  .button { text-align: center; }
  .setup-grid { grid-template-columns: 1fr; }
  .manual-index nav { grid-template-columns: 1fr; }
  .video-grid article { grid-template-columns: 44px 1fr; }
  .video-grid article > a, .video-grid article > em { grid-column: 2; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }