/* 차곡차곡 홍보 사이트 공통 스타일. 다크 전용. 외부 폰트·CDN 없음. */
:root{
  color-scheme: dark;
  --bg:#05070B; --surface:#0D1218; --surface-high:#141B24;
  --line:#1F2A36; --line-strong:#2E3D4C;
  --cyan:#00F0FF; --lime:#B6FF3B; --on-cyan:#001518;
  --text:#E8F4F8; --muted:#8A9BA8;
  --radius:14px; --radius-pill:999px;
  --s1:4px; --s2:8px; --s3:12px; --s4:16px; --s5:24px; --s6:32px; --s7:48px; --s8:64px; --s9:96px;
  --maxw:1080px; --maxw-text:720px;
  --font: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Pretendard", "Noto Sans KR", "Malgun Gothic", system-ui, sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.75;word-break:keep-all;overflow-wrap:anywhere}
img,svg{max-width:100%}
img{height:auto;display:block}
h1,h2,h3,p,ul,ol,dl,dd,figure{margin:0}
ul,ol{padding:0;list-style:none}
h1{font-size:clamp(30px,6vw,52px);font-weight:800;line-height:1.25;letter-spacing:-.02em}
h2{font-size:clamp(24px,4vw,34px);font-weight:800;line-height:1.3;letter-spacing:-.015em}
h3{font-size:19px;font-weight:700;line-height:1.45}
small,.small{font-size:14px}
a{color:inherit}
:focus-visible{outline:3px solid var(--lime);outline-offset:3px;border-radius:4px}
[id]{scroll-margin-top:76px}
.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}
.skip{position:absolute;left:16px;top:-80px;z-index:30;background:var(--lime);color:#0a1400;font-weight:800;padding:10px 16px;border-radius:10px;text-decoration:none}
.skip:focus{top:10px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.wrap-text{max-width:var(--maxw-text)}
.muted{color:var(--muted)}
.center{text-align:center}
.icon{width:24px;height:24px;flex:none;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}

/* 버튼·링크 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:52px;padding:0 22px;border-radius:var(--radius);font:inherit;font-weight:800;font-size:16px;line-height:1.2;text-decoration:none;border:1.2px solid transparent;cursor:pointer;white-space:nowrap;transition:box-shadow .15s,background-color .15s,color .15s,border-color .15s}
.btn-sm{min-height:44px;padding:0 16px;font-size:15px;border-radius:12px}
.btn-primary{background:var(--cyan);color:var(--on-cyan)}
.btn-primary:hover{box-shadow:0 0 18px rgba(0,240,255,.45)}
.btn-primary:active,.btn-outline:active{transform:translateY(1px)}
.btn-outline{background:transparent;border-color:var(--cyan);color:var(--cyan)}
.btn-outline:hover{background:rgba(0,240,255,.1)}
.btn-disabled{background:var(--surface-high);color:var(--muted);border-color:var(--line);cursor:default}
.btn-block{width:100%}
.btn[disabled]{opacity:.7;cursor:progress}
.link{color:var(--cyan);text-decoration:underline;text-underline-offset:3px;transition:color .15s}
.link:hover{color:var(--lime)}
.link-row{display:inline-flex;align-items:center;min-height:44px}

/* 뱃지·눈썹글 */
.badge{display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:var(--radius-pill);font-size:13px;font-weight:700;line-height:1;border:1px solid}
.badge-cyan{color:var(--cyan);border-color:var(--cyan);background:rgba(0,240,255,.12)}
.badge-lime{color:var(--lime);border-color:var(--lime);background:rgba(182,255,59,.12)}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--lime)}

/* 헤더 */
.site-header{position:sticky;top:0;z-index:20;background:rgba(5,7,11,.88);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;gap:12px;min-height:60px}
.logo{display:inline-flex;align-items:center;gap:10px;min-height:44px;font-weight:800;font-size:18px;text-decoration:none;color:var(--text);letter-spacing:-.01em}
.logo img{width:28px;height:28px;border-radius:7px}
.nav-desktop{display:none}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:8px}
.header-actions .only-desktop{display:none}
.menu{position:static}
.menu>summary{list-style:none;display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--line-strong);border-radius:12px;cursor:pointer;color:var(--text)}
.menu>summary::-webkit-details-marker{display:none}
.menu[open]>summary{border-color:var(--cyan);color:var(--cyan)}
.menu-panel{position:absolute;left:0;right:0;top:100%;background:var(--surface);border-bottom:1px solid var(--line-strong);padding:8px 20px 20px;max-height:calc(100vh - 60px);overflow:auto}
.menu-panel a{display:flex;align-items:center;min-height:48px;text-decoration:none;font-weight:700;border-bottom:1px solid var(--line)}
.menu-panel a:hover{color:var(--cyan)}
.menu-panel .menu-extra{color:var(--cyan)}
@media (min-width:860px){
  .wrap{padding:0 32px}
  body{font-size:17px}
  .menu{display:none}
  .nav-desktop{display:flex;gap:16px;margin-left:24px;font-size:15px}
  .nav-desktop a{display:inline-flex;align-items:center;min-height:44px;padding:0 4px;text-decoration:none;color:var(--muted);font-weight:700;white-space:nowrap;transition:color .15s}
  .nav-desktop a:hover{color:var(--text)}
  .header-actions .only-desktop{display:inline-flex}
}
@media (min-width:1024px){.nav-desktop{gap:26px;font-size:16px;margin-left:36px}}
.site-header.is-simple .wrap{justify-content:flex-start}

/* 섹션 공통 */
.section{padding:var(--s8) 0}
.section-alt{background:linear-gradient(180deg,rgba(13,18,24,.75),rgba(13,18,24,.35));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:var(--maxw-text);margin-bottom:var(--s6)}
.section-head p{margin-top:var(--s3);color:var(--muted)}
@media (min-width:860px){.section{padding:var(--s9) 0}.section-head{margin-bottom:var(--s7)}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
@media (min-width:860px){.card{padding:24px}}
.limit{color:var(--muted);font-size:14px;border-left:2px solid var(--line);padding-left:12px;line-height:1.65}
.callout{background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--lime);border-radius:var(--radius);padding:20px}
.callout h3{font-size:17px;margin-bottom:6px}

/* 폰 틀 */
.phone{position:relative;width:260px;max-width:100%;margin:0 auto;padding:6px;border-radius:28px;border:1px solid var(--line-strong);background:#080B10;box-shadow:0 0 40px rgba(0,240,255,.12)}
.phone img{width:100%;border-radius:22px}
.phone-mark{position:absolute;left:6px;right:6px;top:calc(6px + (100% - 12px)*.2015);height:calc((100% - 12px)*.0705);border:2px solid var(--lime);border-radius:10px;box-shadow:0 0 14px rgba(182,255,59,.35);pointer-events:none}
@media (min-width:860px){.phone{width:280px}}

/* 히어로 */
.hero{position:relative;overflow:hidden;padding:40px 0 var(--s8)}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(520px 420px at 8% 0%,rgba(0,240,255,.12),transparent 70%),radial-gradient(560px 460px at 96% 88%,rgba(182,255,59,.09),transparent 70%)}
.hero .wrap{position:relative;display:grid;gap:var(--s7)}
.hero h1{margin:var(--s4) 0 var(--s5);font-size:clamp(26px,7.2vw,40px)}
.hero h1 span{display:block}
.hero-lead{color:var(--text);max-width:34em}
.hero-cta{display:grid;gap:12px;margin-top:var(--s6)}
.hero-note{margin-top:var(--s3);font-size:14px;color:var(--muted)}
.hero-badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:var(--s5)}
@media (min-width:560px){.hero-cta{display:flex;flex-wrap:wrap;align-items:center}}
@media (min-width:860px){
  .hero{padding:72px 0 var(--s9)}
  .hero .wrap{grid-template-columns:55fr 45fr;align-items:center;gap:var(--s6)}
  .hero h1{font-size:clamp(32px,3.5vw,40px)}
}

/* 문제 */
.problem-grid{display:grid;gap:var(--s4)}
.problem-grid .card{display:grid;gap:10px;align-content:start}
.problem-grid .icon{color:var(--cyan)}
.problem-grid p{color:var(--muted);font-size:16px}
.closing{margin-top:var(--s6);font-weight:700;font-size:18px}
@media (min-width:860px){.problem-grid{grid-template-columns:repeat(3,1fr);gap:var(--s5)}}

/* 기능 */
.feature{display:grid;gap:var(--s6);padding:var(--s7) 0;border-top:1px solid var(--line)}
.feature:first-of-type{border-top:0;padding-top:0}
.feature-text{display:grid;gap:var(--s4);align-content:start;justify-items:start}
.feature-text>p{color:var(--text)}
.ticks{display:grid;gap:10px}
.ticks li{display:grid;grid-template-columns:22px 1fr;gap:10px;align-items:start}
.ticks .icon{width:20px;height:20px;margin-top:5px;color:var(--lime)}
.ticks .no .icon{color:var(--muted)}
.ticks .no{color:var(--muted)}
.formula{font-size:14px;color:var(--muted)}
@media (min-width:860px){
  .feature{grid-template-columns:1fr 340px;align-items:center;gap:var(--s8);padding:var(--s8) 0}
  .feature.flip .feature-text{order:2}
  .feature.flip{grid-template-columns:340px 1fr}
}
.extras{margin-top:var(--s6);padding-top:var(--s6);border-top:1px solid var(--line)}
.extras h3{margin-bottom:var(--s4)}
.extras ul{display:flex;flex-wrap:wrap;gap:8px}
.extras li{border:1px solid var(--line-strong);border-radius:var(--radius-pill);padding:6px 14px;font-size:14px;color:var(--text);background:var(--surface)}

/* 사용 흐름 */
.steps{display:grid;gap:0;counter-reset:step}
.steps li{position:relative;display:grid;grid-template-columns:32px 1fr;column-gap:16px;padding-bottom:var(--s6)}
.steps li::before{counter-increment:step;content:counter(step);grid-row:1 / span 3;width:32px;height:32px;border-radius:50%;border:1.5px solid var(--lime);color:var(--lime);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px;line-height:1;background:var(--bg);z-index:1}
.steps li::after{content:"";position:absolute;left:15px;top:36px;bottom:4px;border-left:1.5px dashed var(--line-strong)}
.steps li:last-child{padding-bottom:0}
.steps li:last-child::after{display:none}
.steps h3{grid-column:2;margin-top:1px}
.steps p{grid-column:2;color:var(--muted);font-size:16px;margin-top:6px}
.steps .link-row{grid-column:2}
@media (min-width:1024px){
  .steps{grid-template-columns:repeat(5,1fr);gap:var(--s5)}
  .steps li{display:block;padding-bottom:0}
  .steps li::before{margin-bottom:var(--s4)}
  .steps li::after{left:44px;right:-12px;top:16px;bottom:auto;border-left:0;border-top:1.5px dashed var(--line-strong)}
  .steps p{font-size:15px}
}

/* 역할 */
.roles{display:grid;gap:var(--s4)}
.roles h3{margin-bottom:var(--s4);display:flex;align-items:center;gap:10px}
.roles h3 .icon{color:var(--cyan)}
.roles-note{margin-top:var(--s5);font-size:14px;color:var(--muted)}
@media (min-width:860px){.roles{grid-template-columns:1fr 1fr;gap:var(--s5)}}

/* 개인정보 요약 */
.privacy-grid{display:grid;gap:var(--s6)}
.privacy-grid li{display:grid;grid-template-columns:24px 1fr;gap:6px 14px}
.privacy-grid .icon{color:var(--cyan);margin-top:3px}
.privacy-grid p{grid-column:2;color:var(--muted);font-size:16px}
.privacy-more{margin-top:var(--s7)}
@media (min-width:860px){.privacy-grid{grid-template-columns:repeat(3,1fr);gap:var(--s7) var(--s6)}}

/* 요금 */
.plans{display:grid;gap:var(--s5);justify-content:center;grid-template-columns:minmax(0,420px)}
.plan{background:var(--surface);border:1px solid var(--cyan);border-radius:var(--radius);padding:24px;display:grid;gap:var(--s4);align-content:start;box-shadow:0 0 32px rgba(0,240,255,.07)}
.plan-price{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px;color:var(--muted);font-size:18px;line-height:1.2}
.plan-price b{font-size:40px;font-weight:800;color:var(--text);letter-spacing:-.02em}
.plan-meta{font-size:14px;color:var(--muted)}
.plan .ticks{font-size:16px;padding:var(--s4) 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.plans-note{margin-top:var(--s5);text-align:center;font-size:14px;color:var(--muted)}
@media (min-width:860px){.plans[data-count="2"]{grid-template-columns:repeat(2,minmax(0,420px))}.plans[data-count="3"]{grid-template-columns:repeat(3,minmax(0,1fr))}}

/* FAQ */
.faq{max-width:var(--maxw-text)}
.faq details{border-bottom:1px solid var(--line)}
.faq details:first-child{border-top:1px solid var(--line)}
.faq summary{list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 0;font-weight:700;cursor:pointer}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";flex:none;width:14px;height:14px;background:linear-gradient(var(--cyan),var(--cyan)) center/100% 2px no-repeat,linear-gradient(var(--cyan),var(--cyan)) center/2px 100% no-repeat;transition:transform .15s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 0 20px;color:var(--text)}

/* 문의 */
.contact{text-align:center}
.contact .section-head{margin-left:auto;margin-right:auto}
.contact-box{max-width:640px;margin:0 auto;border:1px solid var(--cyan);border-radius:var(--radius);padding:28px 20px;background:var(--surface);box-shadow:0 0 36px rgba(0,240,255,.08);display:grid;gap:var(--s4);justify-items:center}
.contact-box p{color:var(--muted)}
.contact-email{font-size:15px;color:var(--text);user-select:all}
.contact-sub{margin-top:var(--s5);font-size:14px;color:var(--muted)}

/* 푸터 */
.site-footer{border-top:1px solid var(--line);padding:var(--s7) 0 var(--s6);font-size:14px;color:var(--muted)}
.site-footer .wrap{display:grid;gap:var(--s4)}
.footer-brand{color:var(--text);font-weight:800;font-size:16px}
.footer-brand span{font-weight:400;color:var(--muted);font-size:14px;margin-left:8px}
.footer-links{display:flex;flex-wrap:wrap;gap:0 20px}
.footer-links a{display:inline-flex;align-items:center;min-height:44px;color:var(--muted);text-decoration:none}
.footer-links a:hover{color:var(--cyan)}
.footer-links a.strong{color:var(--text);font-weight:800}
.biz{font-size:12px;display:flex;flex-wrap:wrap;gap:2px 0}
.biz div{display:flex;gap:6px}
.biz dt{font-weight:700}
.biz div+div::before{content:"|";margin:0 10px;color:var(--line-strong)}
@media (max-width:859px){.biz{display:grid}.biz div+div::before{content:none}}

/* 문서형 페이지(download·privacy·404) */
.page{padding:40px 0 var(--s8)}
.page h1{font-size:clamp(28px,5vw,40px);margin-bottom:var(--s3)}
.page-lead{color:var(--muted)}
.dl-actions{display:grid;gap:10px;margin:var(--s6) 0 var(--s7)}
.dl-actions .btn{min-height:56px;font-size:17px}
.dl-actions .note{font-size:14px;color:var(--muted);text-align:center;margin-bottom:10px}
.doc-block{margin-top:var(--s7)}
.doc-block h2{font-size:22px;margin-bottom:var(--s4)}
.num{counter-reset:n;display:grid;gap:14px}
.num li{counter-increment:n;display:grid;grid-template-columns:28px 1fr;gap:12px}
.num li::before{content:counter(n);width:28px;height:28px;border-radius:50%;border:1.5px solid var(--lime);color:var(--lime);font-weight:800;font-size:14px;display:flex;align-items:center;justify-content:center;margin-top:2px}
.num b{color:var(--cyan);font-weight:700}
.doc-block .callout,.doc-block .small-note{margin-top:var(--s5)}
.small-note{font-size:14px;color:var(--muted)}
.page-foot-links{margin-top:var(--s8);padding-top:var(--s5);border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:0 20px;font-size:15px}
@media (min-width:560px){.btn-auto{width:auto}}

/* 처리방침 본문(기존 모양 유지) */
.policy{max-width:760px}
.policy h1{font-size:26px;margin:0 0 4px;letter-spacing:.5px}
.policy .meta{color:var(--muted);font-size:14px;margin-bottom:28px}
.policy h2{font-size:18px;margin:32px 0 8px;color:var(--cyan);font-weight:700}
.policy p{margin:1em 0}
.policy ul{list-style:disc;padding-left:20px;margin:6px 0}
.policy table{width:100%;border-collapse:collapse;font-size:14px;margin:8px 0}
.policy th,.policy td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.policy th{background:var(--surface);color:var(--lime);font-weight:700}
.policy .box{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.policy .table-wrap{overflow-x:auto}
.policy .table-wrap table{min-width:520px}
.policy a{color:var(--cyan)}

/* 404 */
.notfound{min-height:60vh;display:grid;align-content:center;justify-items:center;text-align:center;gap:var(--s4)}
.notfound .actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:var(--s4)}

/* 로그인 */
.auth{min-height:100vh;min-height:100dvh;display:grid;grid-template-rows:1fr auto;padding:24px 20px;background:radial-gradient(520px 420px at 10% 0%,rgba(0,240,255,.10),transparent 70%),radial-gradient(520px 420px at 95% 100%,rgba(182,255,59,.07),transparent 70%),var(--bg)}
.auth-main{align-self:center;justify-self:center;width:100%;max-width:400px;padding:16px 0}
.auth-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px 22px}
.auth .logo{margin-bottom:var(--s5);font-size:20px}
.auth .logo img{width:40px;height:40px;border-radius:10px}
.auth h1{font-size:26px}
.auth-lead{color:var(--muted);font-size:15px;margin:6px 0 var(--s5)}
.field{display:grid;gap:6px;margin-bottom:var(--s4)}
.field label{font-size:14px;color:var(--muted);font-weight:700}
.field-box{position:relative}
.field input{width:100%;height:52px;background:#0A0E14;border:1px solid var(--line);border-radius:var(--radius);color:var(--text);font:inherit;font-size:16px;padding:0 14px}
.field input:hover{border-color:var(--line-strong)}
.field input:focus-visible{border:1.6px solid var(--cyan);outline:3px solid var(--lime);outline-offset:2px}
.field input[aria-invalid="true"]{border-color:var(--lime)}
.field input:disabled{opacity:.6}
.field-box.has-toggle input{padding-right:52px}
.field-toggle{position:absolute;right:4px;top:4px;width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:none;border:0;border-radius:10px;color:var(--muted);cursor:pointer}
.field-toggle[aria-pressed="true"]{color:var(--cyan)}
.field-toggle .icon-off{display:none}
.field-toggle[aria-pressed="true"] .icon-on{display:none}
.field-toggle[aria-pressed="true"] .icon-off{display:block}
.field-error{font-size:14px;color:var(--lime);min-height:0}
.field-error:empty{display:none}
.check{display:inline-flex;align-items:center;gap:10px;min-height:44px;font-size:15px;cursor:pointer;margin-bottom:var(--s3)}
.check input{width:20px;height:20px;accent-color:var(--cyan);margin:0}
.alert{display:grid;grid-template-columns:22px 1fr;gap:10px;background:var(--surface-high);border-left:3px solid var(--lime);border-radius:10px;padding:12px 14px;font-size:15px;line-height:1.6;margin-bottom:var(--s4)}
.alert:empty{display:none}
.alert .icon{width:20px;height:20px;color:var(--lime);margin-top:2px}
.alert small{display:block;color:var(--muted);font-size:13px;margin-top:4px}
.auth-links{margin-top:var(--s5);display:grid;gap:4px;font-size:15px}
.auth-links summary{list-style:none;cursor:pointer;display:inline-flex;align-items:center;min-height:44px}
.auth-links summary::-webkit-details-marker{display:none}
.auth-links details p{background:var(--surface-high);border-radius:10px;padding:12px 14px;font-size:14px;color:var(--text);margin-bottom:8px}
.auth-links .hint{display:block;font-size:13px;color:var(--muted);line-height:1.6}
.auth-foot-links{margin-top:var(--s5);display:flex;flex-wrap:wrap;justify-content:center;gap:0 18px;font-size:14px}
.auth-foot-links a{display:inline-flex;align-items:center;min-height:44px;color:var(--muted)}
.auth-foot-links a:hover{color:var(--cyan)}
.auth-copy{text-align:center;font-size:13px;color:var(--muted);padding-top:16px}
.auth-checking{text-align:center;color:var(--muted);padding:32px 0}
.noscript-box{display:grid;gap:12px;margin-bottom:var(--s4)}
[hidden]{display:none!important}

@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important}}