/* The introduction page and its user manual (templates/site/): the apps' navy, ivory and gold. No scripts, no web fonts. */
:root {
  --navy-950: #0b0f19; --navy: #121826; --navy-2: #1a2235; --navy-3: #232c42; --on-navy: #f3efe6; --on-navy-2: #b9bfcc;
  --ivory: #f6f4ef; --paper: #fffdf9; --ink: #161a24; --ink-2: #4b5161; --line: #e5dfd2;
  --gold: #c9aa5f; --gold-2: #e2c47e; --gold-deep: #7d5f18; --gold-soft: #f3ead3; --good: #1d7a47; --bad: #b3261e;
  --radius: 18px; --shadow: 0 1px 2px rgba(18, 24, 38, .05), 0 12px 32px -12px rgba(18, 24, 38, .18);
  --gutter: 20px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ivory: #10141e; --paper: #171c28; --ink: #ece8df; --ink-2: #aab0bd; --line: #2a3142;
    --gold-deep: #e2c47e; --gold-soft: #2b2617; --good: #5fcf92; --bad: #ff8a80;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 14px 34px -14px rgba(0, 0, 0, .6);
    color-scheme: dark;
  }
}
@media (max-width: 600px) { :root { --gutter: 16px; } }

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 84px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--ivory); color: var(--ink);
  font: 17px/1.65 "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", system-ui, -apple-system, "Segoe UI", sans-serif;
  word-break: keep-all; overflow-wrap: break-word; -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--gold-deep); text-underline-offset: 3px; }
h1, h2, h3 { line-height: 1.25; letter-spacing: -0.02em; margin: 0; }
p { margin: 0; }
b { font-weight: 700; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 var(--gutter); }
.wrap.narrow { max-width: 820px; }
.i { width: 1.2em; height: 1.2em; flex: none; }
:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; border-radius: 6px; }
main:focus { outline: none; }
.skip { position: absolute; left: -10000px; top: 8px; z-index: 50; background: var(--paper); color: var(--ink); padding: 10px 16px; border-radius: 10px; }
.skip:focus { left: 8px; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 52px; padding: 12px 22px;
  border-radius: 14px; font: inherit; font-weight: 700; font-size: 17px; text-decoration: none; border: 1.5px solid transparent;
  transition: transform .15s ease, box-shadow .15s ease, background-color .15s ease; white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn.gold { background: var(--gold); color: #1b1608; box-shadow: 0 10px 24px -10px rgba(201, 170, 95, .7); }
.btn.gold:hover { background: var(--gold-2); }
.btn.ghost { color: var(--on-navy); border-color: rgba(243, 239, 230, .35); background: rgba(255, 255, 255, .04); }
.btn.ghost:hover { border-color: var(--gold-2); color: #fff; }
.btn.small { min-height: 42px; padding: 8px 16px; font-size: 15px; border-radius: 12px; }
.btn.block { display: flex; width: 100%; }
.btn.disabled { background: rgba(255, 255, 255, .06); color: var(--on-navy-2); border-color: rgba(255, 255, 255, .14); cursor: default; }
.btn.disabled:hover { transform: none; }
.btn .ver { font-weight: 600; opacity: .75; font-size: 14px; }
@media (prefers-reduced-motion: reduce) { .btn { transition: none; } .btn:hover { transform: none; } }

/* banner and header */
.banner { background: var(--gold); color: #1b1608; text-align: center; font-weight: 700; font-size: 15px; padding: 9px var(--gutter); }
.top { position: sticky; top: 0; z-index: 20; background: rgba(18, 24, 38, .86); backdrop-filter: saturate(1.4) blur(14px); -webkit-backdrop-filter: saturate(1.4) blur(14px); border-bottom: 1px solid rgba(255, 255, 255, .07); }
.top-row { display: flex; align-items: center; gap: 24px; min-height: 68px; }
.logo { display: inline-flex; align-items: center; gap: 10px; color: var(--on-navy); text-decoration: none; font-weight: 800; font-size: 19px; letter-spacing: -0.01em; }
.logo img { width: 40px; height: 40px; object-fit: contain; }
.nav { display: flex; gap: 4px; margin-left: auto; }
.nav a, .menu nav a { color: var(--on-navy-2); text-decoration: none; font-size: 15.5px; font-weight: 600; padding: 9px 11px; border-radius: 10px; }
.nav a[aria-current="page"], .menu nav a[aria-current="page"] { color: var(--gold-2); }
.nav a:hover, .menu nav a:hover { color: #fff; background: rgba(255, 255, 255, .07); }
.top-cta .i { width: 18px; height: 18px; }
.menu { display: none; position: relative; }
.menu summary { list-style: none; cursor: pointer; color: var(--on-navy); font-weight: 700; font-size: 15px; padding: 9px 14px; border-radius: 12px; border: 1px solid rgba(255, 255, 255, .2); }
.menu summary::-webkit-details-marker { display: none; }
.menu[open] summary { background: rgba(255, 255, 255, .08); }
.menu nav { position: absolute; right: 0; top: calc(100% + 10px); display: grid; min-width: 210px; padding: 8px; background: var(--navy-2); border: 1px solid rgba(255, 255, 255, .1); border-radius: 14px; box-shadow: 0 20px 40px rgba(0, 0, 0, .4); }
@media (max-width: 1060px) { .nav { display: none; } .top-cta { margin-left: auto; } .menu { display: block; } }
@media (max-width: 420px) { .top-row { gap: 10px; } .logo span { font-size: 17px; } .top-cta { padding: 8px 12px; } }

/* hero */
.hero { position: relative; overflow: hidden; color: var(--on-navy); padding: 72px 0 40px;
  background: radial-gradient(1100px 600px at 78% 30%, rgba(201, 170, 95, .16), transparent 60%), radial-gradient(800px 500px at 10% 90%, rgba(70, 92, 150, .22), transparent 60%), var(--navy); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr); gap: 40px; align-items: center; }
.eyebrow { display: inline-block; color: var(--gold-2); font-weight: 700; font-size: 14px; letter-spacing: .06em; padding: 6px 12px; border: 1px solid rgba(226, 196, 126, .35); border-radius: 999px; margin-bottom: 22px; }
.hero h1 { font-size: clamp(34px, 4.6vw, 56px); font-weight: 800; letter-spacing: -0.035em; line-height: 1.16; }
.hero h1 em { font-style: normal; background: linear-gradient(100deg, #f1d896, #c9aa5f 60%, #e9cf8c); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .lead { margin-top: 22px; font-size: clamp(17px, 1.7vw, 19.5px); color: var(--on-navy-2); max-width: 34em; }
.hero .lead b { color: var(--on-navy); }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero-note { display: flex; align-items: center; gap: 8px; margin-top: 18px; color: var(--on-navy-2); font-size: 15px; }
.hero-note .i { color: var(--gold-2); }
.hero-art { position: relative; min-height: 560px; }
.hero-art .glow { position: absolute; inset: 10% 5% 5% 15%; background: radial-gradient(closest-side, rgba(226, 196, 126, .28), transparent); filter: blur(10px); }
.pc-window { position: absolute; left: 0; top: 70px; width: 78%; margin: 0; border-radius: 14px; overflow: hidden; background: #f6f4ef; box-shadow: 0 30px 60px -20px rgba(0, 0, 0, .65), 0 0 0 1px rgba(255, 255, 255, .08); transform: rotate(-2deg); }
.pc-bar { display: flex; align-items: center; gap: 6px; height: 30px; padding: 0 12px; background: #ebe7de; border-bottom: 1px solid #ddd6c8; color: #6b6556; font-size: 12.5px; }
.pc-bar span { width: 10px; height: 10px; border-radius: 50%; background: #d4cdbd; }
.pc-bar b { margin-left: 8px; font-weight: 600; }
.phone { margin: 0; border-radius: 40px; padding: 9px; background: linear-gradient(160deg, #2b3349, #0d111b); box-shadow: 0 40px 70px -24px rgba(0, 0, 0, .75), inset 0 0 0 1px rgba(255, 255, 255, .12); }
.phone img { border-radius: 32px; }
.hero-art .phone { position: absolute; right: 2%; top: 0; width: 46%; max-width: 280px; }
.pulse { position: absolute; left: 16%; bottom: 40px; display: inline-flex; align-items: center; gap: 10px; padding: 10px 16px 10px 10px; border-radius: 999px; background: rgba(18, 24, 38, .82); border: 1px solid rgba(226, 196, 126, .4); color: var(--on-navy); font-weight: 700; font-size: 14.5px; box-shadow: 0 10px 30px rgba(0, 0, 0, .35); }
.pulse span { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--gold); color: #1b1608; }
.pulse .i { width: 20px; height: 20px; }
.proof { list-style: none; margin: 56px 0 0; padding: 18px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; border-radius: var(--radius); background: rgba(255, 255, 255, .04); border: 1px solid rgba(255, 255, 255, .08); }
.proof li { display: flex; align-items: center; gap: 12px; color: var(--on-navy-2); font-size: 15.5px; }
.proof li .i { width: 26px; height: 26px; color: var(--gold-2); }
.proof b { color: var(--on-navy); display: block; font-size: 16.5px; }
@media (max-width: 960px) {
  .hero { padding-top: 48px; }
  .hero-grid { grid-template-columns: minmax(0, 1fr); }
  .hero-art { min-height: 0; height: clamp(380px, 92vw, 560px); max-width: 560px; width: 100%; margin: 0 auto; }
  .proof { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 520px) {
  .cta-row .btn { flex: 1 1 100%; }
  .hero-art .phone { width: 52%; }
  .pc-window { width: 86%; top: 56px; }
  .pulse { left: 6%; bottom: 14px; }
  .proof { grid-template-columns: minmax(0, 1fr); margin-top: 36px; }
}

/* sections */
section { padding: 96px 0; }
@media (max-width: 720px) { section { padding: 64px 0; } }
section.band { background: var(--ivory); }
section.plain { background: var(--paper); }
section.dark { background: radial-gradient(900px 500px at 85% 0%, rgba(201, 170, 95, .12), transparent 60%), var(--navy); color: var(--on-navy); }
.sec-head { text-align: center; max-width: 760px; margin: 0 auto 48px; }
.sec-head.left { text-align: left; margin: 0 0 32px; }
.kicker { color: var(--gold-deep); font-weight: 800; font-size: 14.5px; letter-spacing: .08em; margin-bottom: 12px; }
.kicker.gold, .dark .kicker { color: var(--gold-2); }
.sec-head h2 { font-size: clamp(28px, 3.6vw, 42px); font-weight: 800; }
.sec-lead { margin-top: 16px; color: var(--ink-2); font-size: 17.5px; }
.dark .sec-lead { color: var(--on-navy-2); }
.dark .fine { color: var(--on-navy-2); }
.fine { color: var(--ink-2); font-size: 14.5px; margin-top: 14px; }
.fine.center { text-align: center; max-width: 760px; margin: 28px auto 0; }

/* cards */
.cards { display: grid; gap: 18px; }
.cards.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.cards.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.cards.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 1040px) { .cards.four { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 900px) { .cards.three, .cards.two { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 560px) { .cards.four { grid-template-columns: minmax(0, 1fr); } }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); min-width: 0; }
.plain .card { background: var(--ivory); }
.card h3 { font-size: 20px; margin: 16px 0 8px; }
.card p { color: var(--ink-2); font-size: 16px; }
.badge-icon { display: inline-grid; place-items: center; width: 48px; height: 48px; border-radius: 14px; background: var(--gold-soft); color: var(--gold-deep); }
.badge-icon .i { width: 26px; height: 26px; }
.dark .card { background: var(--navy-2); border-color: rgba(255, 255, 255, .08); box-shadow: none; color: var(--on-navy); }
.dark .card p { color: var(--on-navy-2); }
.dark .badge-icon { background: rgba(226, 196, 126, .14); color: var(--gold-2); }

/* how it works */
.how-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr); gap: 56px; align-items: center; }
.how-grid .phone { max-width: 300px; justify-self: center; }
.phone.tilt { transform: rotate(3deg); }
@media (max-width: 900px) { .how-grid { grid-template-columns: minmax(0, 1fr); } .how-grid .phone { max-width: 250px; } }
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.steps li { display: flex; gap: 18px; align-items: flex-start; padding: 22px; border-radius: var(--radius); background: var(--ivory); border: 1px solid var(--line); }
.steps .num { flex: none; display: grid; place-items: center; width: 40px; height: 40px; border-radius: 12px; background: var(--navy); color: var(--gold-2); font-weight: 800; font-size: 18px; }
.steps h3 { font-size: 19px; margin: 6px 0 6px; }
.steps p { color: var(--ink-2); font-size: 16px; }
.steps.light li { background: var(--navy-2); border-color: rgba(255, 255, 255, .08); }
.steps.light .num { background: var(--gold); color: #1b1608; }
.steps.light p { color: var(--on-navy-2); }
.steps.light b { color: var(--on-navy); }
.addr { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: .95em; padding: 2px 8px; border-radius: 8px; background: var(--gold-soft); color: var(--gold-deep); white-space: nowrap; }
.dark .addr { background: rgba(226, 196, 126, .16); color: var(--gold-2); }
.offline-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 48px; align-items: start; }
.offline-grid > .sec-head { position: sticky; top: 100px; }
@media (max-width: 900px) { .offline-grid { grid-template-columns: minmax(0, 1fr); gap: 8px; } .offline-grid > .sec-head { position: static; } }

/* devices: the two app cards stacked beside the taller card for the devices without an app */
.cards.devices { align-items: start; grid-template-rows: auto 1fr; }
.cards.devices .web { grid-column: 2; grid-row: 1 / span 2; }
@media (max-width: 900px) { .cards.devices { grid-template-rows: none; } .cards.devices .web { grid-column: auto; grid-row: auto; } }
.device-head { display: flex; gap: 14px; align-items: center; }
.device-head h3 { margin: 0; }
.tag { font-size: 14.5px !important; color: var(--gold-deep) !important; font-weight: 700; margin-top: 2px !important; }
.device-lead { margin-top: 14px; }
.mini-steps { list-style: none; counter-reset: step; margin: 18px 0 0; padding: 0; display: grid; gap: 8px; }
.mini-steps li { counter-increment: step; display: flex; gap: 12px; align-items: flex-start; font-size: 16px; }
.mini-steps li::before { content: counter(step); flex: none; display: grid; place-items: center; width: 26px; height: 26px; margin-top: 1px;
  border-radius: 8px; background: var(--navy); color: var(--gold-2); font-weight: 800; font-size: 14px; }
.ticks { list-style: none; margin: 18px 0 0; padding: 0; display: grid; gap: 10px; }
.ticks li { display: flex; gap: 10px; align-items: flex-start; font-size: 16px; }
.ticks .i { width: 20px; height: 20px; margin-top: 3px; color: var(--good); }
.can { margin-top: 18px; padding: 16px 18px; border-radius: 14px; background: var(--ivory); border: 1px solid var(--line); }
.can-title { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 15.5px; color: var(--ink) !important; }
.can-title + ul { margin: 8px 0 14px; padding-left: 30px; color: var(--ink-2); font-size: 15.5px; }
.can-title + ul:last-child { margin-bottom: 0; }
.can-title.ok .i { color: var(--good); }
.can-title.no .i { color: var(--bad); }
.can li + li { margin-top: 3px; }

/* features */
.features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 34px 28px; }
@media (max-width: 900px) { .features { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .features { grid-template-columns: minmax(0, 1fr); } }
.features h3 { font-size: 19px; margin: 16px 0 8px; }
.features p { color: var(--ink-2); font-size: 16px; }

/* plans */
/* as many plans as the catalog shows: four side by side on a wide screen, fewer as it narrows */
.plans { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(236px, 100%), 1fr)); gap: 16px; align-items: stretch; }
.plain .plan:not(.featured) { background: var(--ivory); }
.plan { position: relative; background: var(--paper); border: 1px solid var(--line); border-radius: 22px; padding: 28px 24px; box-shadow: var(--shadow); min-width: 0; }
.plan.featured { background: var(--navy); color: var(--on-navy); border-color: var(--navy); box-shadow: 0 30px 60px -28px rgba(18, 24, 38, .8); }
.plan h3 { font-size: 22px; }
.plan .flag { position: absolute; top: 22px; right: 22px; padding: 3px 12px; border-radius: 999px; background: var(--gold); color: #1b1608; font-weight: 800; font-size: 14px; }
.plan .price { margin-top: 14px; display: flex; align-items: baseline; gap: 6px; }
.plan .price b { font-size: 36px; font-weight: 800; letter-spacing: -0.03em; }
.plan .price span { color: var(--ink-2); font-size: 16px; }
.plan .tagline { margin-top: 8px; color: var(--ink-2); font-size: 15.5px; }
.plan.featured .price span, .plan.featured .tagline { color: var(--on-navy-2); }
.plan.featured .ticks .i { color: var(--gold-2); }
.plan .ticks { margin-top: 22px; padding-top: 20px; border-top: 1px solid var(--line); }
.plan.featured .ticks { border-color: rgba(255, 255, 255, .12); }

/* download */
.card.dl { display: flex; flex-direction: column; gap: 4px; }
.card.dl p { flex: 1; margin-bottom: 18px; }
.more { display: inline-flex; align-items: center; gap: 6px; margin-top: 14px; color: var(--gold-2); font-weight: 700; text-decoration: none; font-size: 15.5px; }
.more:hover { text-decoration: underline; }
.more .i { width: 18px; height: 18px; }
.card.dl .btn + .more { justify-content: center; }

/* questions */
.faq { display: grid; gap: 12px; }
.faq details { background: var(--ivory); border: 1px solid var(--line); border-radius: 16px; padding: 0 22px; }
.faq summary { list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; font-weight: 700; font-size: 17.5px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; flex: none; display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--gold-soft); color: var(--gold-deep); font-weight: 800; font-size: 20px; line-height: 1; }
.faq details[open] summary::after { content: "−"; }
.faq details p { padding: 0 0 20px; color: var(--ink-2); font-size: 16.5px; }

/* footer */
.foot { background: var(--navy-950); color: var(--on-navy-2); padding: 56px 0 40px; font-size: 15px; }
.foot-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 28px; }
.foot-lead { margin-top: 10px; }
.foot-links { display: flex; flex-wrap: wrap; gap: 6px 22px; align-items: center; max-width: 640px; }
.foot-links a { color: var(--on-navy); text-decoration: none; display: inline-flex; align-items: center; gap: 6px; min-height: 36px; }
.foot-links a:hover { text-decoration: underline; }
.foot-links .i { width: 17px; height: 17px; color: var(--gold-2); }
.foot-legal { margin-top: 32px; padding-top: 24px; border-top: 1px solid rgba(255, 255, 255, .08); font-size: 13.5px; display: grid; gap: 8px; }
.foot-legal .business { white-space: pre-line; }


/* small shared pieces */
.vh { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.tier { display: inline-block; vertical-align: 3px; margin-left: 6px; padding: 2px 9px; border-radius: 999px; background: var(--navy); color: var(--gold-2); font-size: 12.5px; font-weight: 800; letter-spacing: 0; white-space: nowrap; }
.more.dark { color: var(--gold-deep); margin-top: 18px; }
.sub-title { font-size: 21px; margin: 0 0 16px; }

/* 데이터 무제한: right under the hero, warm */
section.accent { background: linear-gradient(180deg, var(--gold-soft), var(--ivory)); padding: 80px 0 64px; }
.unl-grid { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); gap: 48px; align-items: center; }
.unl-grid .sec-head { margin: 0; }
.unl-grid h2 { font-size: clamp(30px, 3.8vw, 46px); }
.unl-points { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.unl-points li { display: flex; gap: 16px; align-items: flex-start; padding: 20px 22px; border-radius: var(--radius); background: var(--paper); border: 1px solid var(--line); box-shadow: var(--shadow); }
.unl-points h3 { font-size: 19px; margin: 4px 0 4px; }
.unl-points p { color: var(--ink-2); font-size: 16px; }
.unl-fine { margin-top: 28px; }
@media (max-width: 900px) { .unl-grid { grid-template-columns: minmax(0, 1fr); gap: 28px; } section.accent { padding: 56px 0 48px; } }

/* 이럴 때: four groups of moments */
.uses { display: grid; gap: 40px; }
.use-head { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.use-head h3 { font-size: 22px; }
.use-head p { color: var(--ink-2); font-size: 15.5px; }
.use-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.use { position: relative; padding: 22px 20px 20px; border-radius: var(--radius); background: var(--ivory); border: 1px solid var(--line); min-width: 0; }
.use::before { content: ""; position: absolute; left: 20px; right: 20px; top: 0; height: 3px; border-radius: 0 0 3px 3px; background: linear-gradient(90deg, var(--gold), transparent); }
.use-tag { display: inline-block; font-size: 13px; font-weight: 800; color: var(--gold-deep); background: var(--gold-soft); padding: 3px 10px; border-radius: 999px; }
.use h4 { margin: 12px 0 8px; font-size: 17.5px; line-height: 1.4; letter-spacing: -0.02em; }
.use p:last-child { color: var(--ink-2); font-size: 15.5px; }
@media (max-width: 1040px) { .use-list { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
/* a phone: each group swipes sideways instead of stacking sixteen cards */
@media (max-width: 640px) {
  .use-list { grid-template-columns: none; grid-auto-flow: column; grid-auto-columns: 84%; overflow-x: auto; scroll-snap-type: x mandatory;
    margin: 0 calc(-1 * var(--gutter)); padding: 4px var(--gutter) 12px; scroll-padding: 0 var(--gutter); scrollbar-width: thin; }
  .use { scroll-snap-align: start; }
}
.callout { display: flex; align-items: center; gap: 18px; margin-top: 40px; padding: 22px 24px; border-radius: var(--radius); background: var(--navy); color: var(--on-navy); }
.callout h3 { font-size: 19px; margin-bottom: 4px; }
.callout p { color: var(--on-navy-2); font-size: 15.5px; }
.callout .badge-icon { background: rgba(226, 196, 126, .14); color: var(--gold-2); flex: none; }
.callout .more { margin: 0 0 0 auto; white-space: nowrap; }
@media (max-width: 720px) { .callout { flex-wrap: wrap; } .callout .more { margin-left: 0; } }

/* 기능 on the band */
.band .features article { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.features h3 .tier { vertical-align: 2px; }
/* a phone: the icon beside the words, so nine features stay short */
@media (max-width: 560px) {
  .features { gap: 12px; }
  .band .features article { display: grid; grid-template-columns: 48px minmax(0, 1fr); column-gap: 14px; padding: 18px; }
  .features article .badge-icon { grid-row: 1 / span 2; }
  .features article h3 { margin: 2px 0 4px; font-size: 17.5px; }
  .features article p { font-size: 15.5px; }
}

/* 연결 방법: who gives, who takes */
.roles { display: grid; grid-template-columns: minmax(0, .8fr) auto minmax(0, 1.2fr); gap: 18px; align-items: center; }
.role { padding: 22px 24px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--ivory); min-width: 0; }
.role.give { background: var(--navy); color: var(--on-navy); border-color: var(--navy); }
.role-label { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 15px; letter-spacing: .02em; color: var(--gold-deep); margin-bottom: 12px; }
.role.give .role-label { color: var(--gold-2); }
.role ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.role li { display: flex; align-items: center; gap: 12px; }
.role li > .i { width: 26px; height: 26px; color: var(--gold-deep); }
.role.give li > .i { color: var(--gold-2); }
.role li b { display: block; font-size: 17px; }
.role li small { display: block; color: var(--ink-2); font-size: 14.5px; }
.role.give li small { color: var(--on-navy-2); }
.role-arrow { display: grid; justify-items: center; gap: 2px; color: var(--gold-deep); font-weight: 800; font-size: 13px; }
.role-arrow .i { width: 24px; height: 24px; }
@media (max-width: 760px) { .roles { grid-template-columns: minmax(0, 1fr); } .role-arrow { grid-auto-flow: column; justify-content: center; align-items: center; gap: 6px; } .role-arrow .i:last-child { transform: rotate(90deg); } }
.note-box { display: flex; gap: 12px; align-items: flex-start; margin: 18px 0 56px; padding: 16px 20px; border-radius: 14px; background: var(--gold-soft); color: var(--ink); font-size: 16px; }
.note-box > .i { width: 22px; height: 22px; margin-top: 2px; color: var(--gold-deep); }
#connect .how-grid { align-items: start; }

/* iPhone·iPad: one step after another, each saying which device it happens on */
.flow { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 14px; counter-reset: none; }
.flow-step { position: relative; display: flex; flex-direction: column; gap: 6px; padding: 18px 18px 20px; border-radius: var(--radius); background: var(--paper); border: 1px solid var(--line); box-shadow: var(--shadow); min-width: 0; }
.flow-step:not(:last-child)::after { content: ""; position: absolute; top: 50%; right: -12px; width: 10px; height: 10px; border-top: 2.5px solid var(--gold); border-right: 2.5px solid var(--gold); transform: translateY(-50%) rotate(45deg); z-index: 1; }
.wheres { display: flex; flex-wrap: wrap; gap: 4px; align-self: flex-start; justify-self: start; }
.flow-step .where { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 999px; font-size: 13px; font-weight: 800; background: var(--ivory); color: var(--ink-2); border: 1px solid var(--line); }
.flow-step .where .i { width: 15px; height: 15px; }
.flow-step .where.host { background: var(--navy); color: var(--gold-2); border-color: var(--navy); }
.flow-step .where.guest { background: var(--gold-soft); color: var(--gold-deep); border-color: transparent; }
.flow-step .num { display: grid; place-items: center; width: 34px; height: 34px; margin-top: 8px; border-radius: 10px; background: var(--gold); color: #1b1608; font-weight: 800; font-size: 17px; }
.flow-step .num .i { width: 20px; height: 20px; }
.flow-step h3 { font-size: 17.5px; line-height: 1.35; margin: 4px 0 2px; }
.flow-step h3 small { display: inline-block; margin-left: 4px; font-size: 12.5px; font-weight: 800; color: var(--gold-deep); }
.flow-step p { color: var(--ink-2); font-size: 15px; }
.flow-step.done { background: var(--navy); border-color: var(--navy); color: var(--on-navy); }
.flow-step.done p { color: var(--on-navy-2); }
.flow-step.done .where { background: rgba(255, 255, 255, .08); color: var(--on-navy); border-color: transparent; }
.flow-step.done .num { background: var(--good); color: #fff; }
@media (max-width: 1040px) {
  .flow { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .flow-step { display: grid; grid-template-columns: 34px minmax(0, 1fr); column-gap: 16px; row-gap: 4px; margin-bottom: 18px; }
  .flow-step .num { grid-column: 1; grid-row: 1 / span 3; margin-top: 0; }
  .flow-step .wheres, .flow-step h3, .flow-step p { grid-column: 2; }
  .flow-step:not(:last-child)::after { top: auto; bottom: -15px; left: 35px; right: auto; transform: rotate(135deg); }
}
.band .flow + .fine.center, .doc .flow + .fine { margin-top: 24px; }

/* the user manual (guide.html) */
.guide-hero { padding: 64px 0 48px; color: var(--on-navy); background: radial-gradient(900px 400px at 85% 0%, rgba(201, 170, 95, .14), transparent 60%), var(--navy); }
.guide-hero .kicker { display: flex; align-items: center; gap: 8px; }
.guide-hero h1 { font-size: clamp(30px, 4vw, 44px); font-weight: 800; }
.guide-hero .lead { margin-top: 14px; color: var(--on-navy-2); font-size: 18px; }
.guide-grid { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 48px; align-items: start; padding-top: 48px; padding-bottom: 96px; }
.toc { position: sticky; top: 92px; }
.toc summary { list-style: none; font-weight: 800; font-size: 14.5px; letter-spacing: .06em; color: var(--gold-deep); margin-bottom: 10px; cursor: default; }
.toc summary::-webkit-details-marker { display: none; }
.toc ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; counter-reset: toc; }
.toc li { counter-increment: toc; }
.toc a { display: flex; gap: 10px; padding: 8px 10px; border-radius: 10px; color: var(--ink-2); text-decoration: none; font-size: 15.5px; font-weight: 600; }
.toc a::before { content: counter(toc); min-width: 1.2em; color: var(--gold-deep); font-weight: 800; }
.toc a:hover { background: var(--paper); color: var(--ink); }
@media (max-width: 900px) {
  .guide-grid { grid-template-columns: minmax(0, 1fr); gap: 24px; padding-top: 24px; }
  .toc { position: static; padding: 14px 16px; border-radius: 14px; background: var(--paper); border: 1px solid var(--line); }
  .toc summary { cursor: pointer; margin: 0; }
  .toc details[open] summary { margin-bottom: 8px; }
}
.doc section { padding: 0 0 44px; margin-bottom: 44px; border-bottom: 1px solid var(--line); background: none; }
.doc section:last-child { border-bottom: 0; margin-bottom: 0; }
.doc h2 { display: flex; align-items: center; gap: 12px; font-size: clamp(24px, 2.6vw, 30px); margin-bottom: 16px; }
.doc h2 .n { display: grid; place-items: center; flex: none; width: 36px; height: 36px; border-radius: 10px; background: var(--navy); color: var(--gold-2); font-size: 17px; }
.doc > section > p { color: var(--ink-2); margin-bottom: 14px; }
.doc .fine { margin: 12px 0 18px; }
.num-list { margin: 0 0 16px; padding-left: 1.4em; display: grid; gap: 10px; }
.num-list li { padding-left: 4px; }
.num-list li::marker { font-weight: 800; color: var(--gold-deep); }
.dots { margin: 8px 0 16px; padding-left: 1.2em; display: grid; gap: 8px; color: var(--ink-2); }
.dots b, .num-list b { color: var(--ink); }
.need { width: 100%; border-collapse: collapse; margin: 6px 0 18px; font-size: 15.5px; background: var(--paper); border-radius: 14px; overflow: hidden; box-shadow: 0 0 0 1px var(--line); }
.need th, .need td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: middle; }
.need thead th { background: var(--navy); color: var(--on-navy); font-size: 14px; }
.need tbody tr:last-child > * { border-bottom: 0; }
.need .yes { color: var(--good); } .need .no { color: var(--bad); }
.need td.yes, .need td.no { text-align: center; width: 84px; }
.need .i { width: 22px; height: 22px; }
@media (max-width: 600px) { .need { font-size: 14px; } .need th, .need td { padding: 10px 8px; } .need td.yes, .need td.no { width: 56px; } }
.tip { margin: 14px 0; padding: 16px 18px; border-radius: 14px; background: var(--gold-soft); }
.tip-title { display: flex; align-items: center; gap: 8px; font-weight: 800; margin-bottom: 4px; }
.tip-title .i { color: var(--gold-deep); }
.tip p:last-child { color: var(--ink-2); font-size: 16px; }
.tip b { color: var(--ink); }
.more-box { margin: 14px 0; border: 1px solid var(--line); border-radius: 14px; background: var(--paper); padding: 0 18px; }
.more-box summary { cursor: pointer; min-height: 52px; display: flex; align-items: center; font-weight: 700; }
.more-box p { padding: 0 0 16px; color: var(--ink-2); font-size: 16px; }
.doc .can { margin: 18px 0; }
.doc .flow { grid-template-columns: minmax(0, 1fr); gap: 0; margin: 18px 0 6px; }
.doc .flow-step { display: grid; grid-template-columns: 34px minmax(0, 1fr); column-gap: 16px; row-gap: 4px; margin-bottom: 18px; }
.doc .flow-step .num { grid-column: 1; grid-row: 1 / span 3; margin-top: 0; }
.doc .flow-step .wheres, .doc .flow-step h3, .doc .flow-step p { grid-column: 2; }
.doc .flow-step:not(:last-child)::after { top: auto; bottom: -15px; left: 35px; right: auto; transform: rotate(135deg); }

/* dark: the navy pieces would sink into the dark page, so they take the lighter navy */
@media (prefers-color-scheme: dark) {
  .role.give, .steps .num, .doc h2 .n, .flow-step.done, .flow-step .where.host, .need thead th, .callout, .plan.featured { background: var(--navy-3); border-color: var(--navy-3); }
  .tier { background: rgba(226, 196, 126, .16); }
  .use::before { background: linear-gradient(90deg, var(--gold-2), transparent); }
}