/* =============================================================
   고백기술 홈페이지 스타일
   - 밝은 본문 + 짙은 네이비 히어로/푸터
   - 포인트 컬러는 브랜드 블루 하나, 인식(detection) 그린은 영상 화면에만 사용
   ============================================================= */
:root{
  --bg:#FFFFFF;
  --bg-soft:#F4F6F9;
  --ink:#0C1424;
  --ink-2:#4A5468;
  --ink-3:#8B94A7;
  --line:#E3E7EE;

  --navy:#0A1020;
  --navy-2:#131B2F;
  --navy-line:rgba(255,255,255,.12);
  --on-navy:#E9EDF5;
  --on-navy-2:#9AA4B8;

  --accent:#2F6BFF;
  --accent-hover:#1F57E6;
  --accent-soft:#EAF0FF;
  --signal:#3CE0A0;
  --danger:#D93F3F;

  --font:'Pretendard Variable','Pretendard',-apple-system,BlinkMacSystemFont,'Apple SD Gothic Neo','Malgun Gothic',sans-serif;
  --mono:'JetBrains Mono',ui-monospace,'SFMono-Regular',Consolas,monospace;

  --maxw:1200px;
  --header-h:72px;
  --r-sm:8px;
  --r-lg:16px;
}

*,*::before,*::after{box-sizing:border-box;}
[hidden]{display:none !important;}
html{scroll-behavior:smooth;scroll-padding-top:var(--header-h);}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--font);font-size:16px;line-height:1.7;
  -webkit-font-smoothing:antialiased;word-break:keep-all;
  padding-bottom:env(safe-area-inset-bottom,0px);
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,p,dl,dd{margin:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px;}
.wrap{max-width:var(--maxw);margin:0 auto;padding-left:28px;padding-right:28px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 26px;border-radius:var(--r-sm);
  font-size:16px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:background-color .15s,border-color .15s,color .15s;
  white-space:nowrap;
}
.btn-sm{height:40px;padding:0 18px;font-size:14.5px;}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:var(--accent-hover);}
.btn-outline{background:transparent;border-color:var(--line);color:var(--ink);}
.btn-outline:hover{border-color:var(--ink-3);}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.35);color:#fff;}
.btn-outline-light:hover{border-color:#fff;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(12px);-webkit-backdrop-filter:saturate(180%) blur(12px);
  padding-top:env(safe-area-inset-top,0px);
  border-bottom:1px solid transparent;transition:border-color .2s;
}
.site-header.scrolled{border-bottom-color:var(--line);}
.header-inner{height:var(--header-h);display:flex;align-items:center;gap:40px;}
.brand{display:flex;align-items:center;flex:0 0 auto;}
.brand-logo{height:34px;width:auto;}
.brand-name{font-size:20px;font-weight:800;letter-spacing:-0.03em;}
.main-nav{display:flex;gap:36px;margin-left:auto;}
.main-nav a{font-size:15.5px;font-weight:500;color:var(--ink-2);transition:color .15s;}
.main-nav a:hover{color:var(--ink);}
.menu-btn{display:none;margin-left:auto;width:40px;height:40px;border:none;background:none;cursor:pointer;position:relative;}
.menu-btn span{position:absolute;left:10px;right:10px;height:2px;background:var(--ink);transition:transform .2s;}
.menu-btn span:first-child{top:15px;}
.menu-btn span:last-child{top:23px;}
.menu-btn[aria-expanded="true"] span:first-child{transform:translateY(4px) rotate(45deg);}
.menu-btn[aria-expanded="true"] span:last-child{transform:translateY(-4px) rotate(-45deg);}
.mobile-nav{display:none;}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;background:var(--navy);color:#fff;
  min-height:min(780px, calc(100vh - var(--header-h)));
  display:flex;align-items:center;
}
.hero-canvas{position:absolute;inset:0;width:100%;height:100%;display:block;}
.hero-shade{
  position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(90deg, rgba(10,16,32,.97) 0%, rgba(10,16,32,.9) 38%, rgba(10,16,32,.35) 58%, rgba(10,16,32,0) 74%);
}
.hero-inner{position:relative;z-index:1;width:100%;padding-top:96px;padding-bottom:96px;}
.hero-title{
  font-size:clamp(40px, 5.4vw, 72px);font-weight:700;line-height:1.16;letter-spacing:-0.035em;
  max-width:11em;
}
.hero-lede{margin-top:28px;max-width:30em;font-size:18px;line-height:1.75;color:var(--on-navy-2);}
.hero-cta{display:flex;gap:12px;margin-top:44px;flex-wrap:wrap;}

/* ---------- sections ---------- */
.section{padding:128px 0;}
.section-soft{background:var(--bg-soft);}
.section-title{font-size:clamp(30px, 3.4vw, 44px);font-weight:700;letter-spacing:-0.03em;line-height:1.25;}
.section-desc{margin-top:16px;font-size:17px;color:var(--ink-2);max-width:34em;}
.section-head{margin-bottom:64px;}
.split{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.4fr);gap:72px;align-items:start;}
.split-head{position:sticky;top:calc(var(--header-h) + 40px);}

/* ---------- business ---------- */
.biz-list{border-top:1px solid var(--ink);}
.biz-row{display:grid;grid-template-columns:48px minmax(0,1fr);gap:28px;padding:36px 0;border-bottom:1px solid var(--line);}
.biz-icon{width:48px;height:48px;border-radius:12px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;}
.biz-icon svg{width:24px;height:24px;}
.biz-row h3{font-size:22px;font-weight:700;letter-spacing:-0.02em;line-height:1.4;}
.biz-row p{margin-top:8px;font-size:16px;color:var(--ink-2);max-width:40em;}

/* ---------- products ---------- */
.product-list{display:flex;flex-direction:column;gap:28px;}
.product{
  display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);
  background:var(--bg);border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
}
.product-media{position:relative;background:var(--navy);display:flex;align-items:center;justify-content:center;padding:36px;min-height:360px;}
.product-media img{width:100%;height:auto;border-radius:10px;}
/* 관리자가 업로드한 이미지: 영역을 꽉 채우되 잘리지 않게 */
.product-media.has-upload{background:#EEF1F5;padding:0;}
.product-media.has-upload img{position:absolute;inset:24px;width:calc(100% - 48px);height:calc(100% - 48px);object-fit:contain;border-radius:6px;}
.media-tools{position:absolute;right:16px;bottom:16px;z-index:2;display:flex;gap:8px;}
.media-btn{height:36px;padding:0 14px;border:none;border-radius:var(--r-sm);background:rgba(255,255,255,.94);color:var(--ink);font-family:inherit;font-size:13.5px;font-weight:600;cursor:pointer;box-shadow:0 2px 10px rgba(10,16,32,.18);}
.media-btn:hover{background:#fff;}
.product-media.is-dragover{outline:3px dashed var(--accent);outline-offset:-12px;}
.product-media.is-uploading::after{content:'업로드 중…';position:absolute;inset:0;z-index:3;display:grid;place-items:center;background:rgba(10,16,32,.6);color:#fff;font-weight:600;}
.product-body{padding:56px 56px;display:flex;flex-direction:column;justify-content:center;}
.product-tag{font-family:var(--mono);font-size:12.5px;color:var(--accent);letter-spacing:.02em;}
.product-body h3{margin-top:14px;font-size:clamp(28px, 2.8vw, 36px);font-weight:800;letter-spacing:-0.03em;line-height:1.2;}
.product-tagline{margin-top:10px;font-size:18px;font-weight:600;color:var(--ink);}
.product-desc{margin-top:18px;font-size:16px;color:var(--ink-2);max-width:30em;}
.product:nth-child(even) .product-media{order:2;} /* 짝수 번째 제품은 이미지를 오른쪽에 (좌우 번갈아 배치) */
.product-admin{margin-top:28px;}

/* ---------- projects (과제) ---------- */
/* 본문 폭 안에서 한 번에 3개만 보이고, 경계 밖으로 나간 카드는 바로 가려짐 */
.project-viewport{overflow:hidden;--pj-gap:24px;--pj-per-view:3;}
.project-track{display:flex;gap:var(--pj-gap);margin:0;padding:0;list-style:none;will-change:transform;}
.project-card{flex:0 0 calc((100% - var(--pj-gap) * (var(--pj-per-view) - 1)) / var(--pj-per-view));min-width:0;}
.project-thumb{position:relative;aspect-ratio:4/3;border-radius:var(--r-lg);overflow:hidden;background:var(--bg-soft);border:1px solid var(--line);}
.project-thumb img{width:100%;height:100%;object-fit:cover;display:block;}
.project-title{margin-top:16px;font-size:18px;font-weight:700;letter-spacing:-0.02em;line-height:1.45;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.project-card .btn-text{margin-top:6px;}
.project-empty{padding:40px 0;color:var(--ink-3);}
.project-thumb.is-uploading::after{content:'업로드 중…';position:absolute;inset:0;display:grid;place-items:center;background:rgba(10,16,32,.6);color:#fff;font-weight:600;}
.project-thumb.is-dragover{outline:3px dashed var(--accent);outline-offset:-10px;}
/* 편집 모드: 롤링을 멈추고 3개씩 줄바꿈해서 전부 펼침 */
body.is-editing .project-viewport{overflow:visible;}
body.is-editing .project-track{flex-wrap:wrap;row-gap:40px;transform:none !important;}
body.is-editing .project-title{-webkit-line-clamp:unset;display:block;}

/* ---------- about ---------- */
.about-statement{
  margin-top:36px;max-width:26em;
  font-size:clamp(22px, 2.3vw, 30px);font-weight:600;line-height:1.6;letter-spacing:-0.02em;color:var(--ink);
}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);margin-top:80px;border-top:1px solid var(--ink);}
.stat{padding:32px 24px 0 0;}
.stat + .stat{padding-left:24px;border-left:1px solid var(--line);}
.stat dt{font-size:14.5px;color:var(--ink-3);font-weight:500;}
.stat dd{margin-top:10px;font-size:clamp(32px, 3.6vw, 48px);font-weight:700;letter-spacing:-0.03em;font-variant-numeric:tabular-nums;line-height:1.1;}

/* ---------- history ---------- */
.history-list{border-top:1px solid var(--ink);}
.hist-group{display:grid;grid-template-columns:120px minmax(0,1fr);gap:24px;padding:32px 0;border-bottom:1px solid var(--line);}
.hist-year{font-size:28px;font-weight:700;letter-spacing:-0.03em;line-height:1.3;font-variant-numeric:tabular-nums;}
.hist-items{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px;}
.hist-item{display:grid;grid-template-columns:72px minmax(0,1fr) auto;gap:16px;align-items:baseline;}
.hist-date{font-family:var(--mono);font-size:13.5px;color:var(--ink-3);}
.hist-text{font-size:17px;color:var(--ink);}
.history-empty{padding:32px 0;color:var(--ink-3);}

/* ---------- footer / contact ---------- */
.site-footer{background:var(--navy);color:var(--on-navy);padding:120px 0 40px;}
.contact-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:72px;}
.contact-intro h2{font-size:clamp(30px, 3.4vw, 44px);font-weight:700;line-height:1.3;letter-spacing:-0.03em;color:#fff;}
.contact-intro p{margin-top:20px;color:var(--on-navy-2);max-width:28em;}
.contact-list{display:flex;flex-direction:column;margin-top:48px;border-top:1px solid var(--navy-line);}
.contact-list > div{display:grid;grid-template-columns:96px minmax(0,1fr);gap:16px;padding:20px 0;border-bottom:1px solid var(--navy-line);}
.contact-list dt{font-size:14px;color:var(--on-navy-2);padding-top:2px;}
.contact-list dd{font-size:16px;color:#fff;}
/* 문의 작성란 */
.contact-form-wrap{align-self:start;background:var(--navy-2);border:1px solid var(--navy-line);border-radius:var(--r-lg);padding:40px;}
.contact-form-title,.contact-done h3{font-size:22px;font-weight:700;color:#fff;letter-spacing:-0.02em;margin-bottom:8px;}
.cf-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.cf-field{margin-top:18px;}
.cf-field label{display:block;margin-bottom:8px;font-size:14px;font-weight:600;color:var(--on-navy);}
.cf-field input,.cf-field textarea{
  width:100%;padding:0 14px;border:1px solid rgba(255,255,255,.16);border-radius:var(--r-sm);
  background:rgba(255,255,255,.04);color:#fff;font-family:inherit;font-size:15px;
  transition:border-color .15s,background-color .15s;
}
.cf-field input{height:48px;}
.cf-field textarea{padding:12px 14px;line-height:1.6;resize:vertical;min-height:132px;}
.cf-field input::placeholder,.cf-field textarea::placeholder{color:#6B768C;}
.cf-field input:focus,.cf-field textarea:focus{outline:none;border-color:var(--accent);background:rgba(255,255,255,.07);box-shadow:0 0 0 3px rgba(47,107,255,.25);}
.cf-field input[aria-invalid="true"],.cf-field textarea[aria-invalid="true"]{border-color:#FF6B6B;}
.cf-trap{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden;}
.cf-agree{display:flex;gap:10px;align-items:flex-start;margin-top:20px;font-size:14px;color:var(--on-navy-2);cursor:pointer;line-height:1.55;}
.cf-agree input{flex:0 0 auto;width:18px;height:18px;margin-top:2px;accent-color:var(--accent);}
.cf-status{margin-top:16px;font-size:14px;color:#FF8A8A;}
.cf-status a{color:#fff;text-decoration:underline;}
.cf-submit{width:100%;margin-top:24px;}
.cf-submit:disabled{opacity:.6;cursor:default;}
.contact-done{text-align:left;padding:8px 0;}
.contact-done p{margin-top:8px;color:var(--on-navy-2);}
.contact-done .btn{margin-top:28px;}
.footer-bottom{margin-top:96px;padding-top:28px;border-top:1px solid var(--navy-line);display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;font-size:13.5px;color:var(--on-navy-2);}
.footer-brand{font-size:17px;font-weight:800;color:#fff;letter-spacing:-0.02em;}

/* ---------- admin: editable fields ---------- */
body.is-editing [data-editable]{outline:1px dashed rgba(47,107,255,.55);outline-offset:3px;border-radius:3px;cursor:text;}
body.is-editing [data-editable]:hover{background:rgba(47,107,255,.06);}
body.is-editing [data-editable]:focus{outline:2px solid var(--accent);background:rgba(47,107,255,.08);}
body.is-editing .site-footer [data-editable]{outline-color:rgba(255,255,255,.4);}
body.is-editing .site-footer [data-editable]:focus{outline-color:#fff;background:rgba(255,255,255,.08);}
.admin-actions{margin-top:28px;}
.btn-text{background:none;border:none;padding:4px 0;font-size:14px;font-weight:600;cursor:pointer;color:var(--ink-3);}
.btn-text.danger:hover{color:var(--danger);}

.login-fab{
  position:fixed;right:20px;bottom:calc(20px + env(safe-area-inset-bottom,0px));z-index:60;
  height:36px;padding:0 14px;border-radius:999px;border:1px solid var(--line);
  background:rgba(255,255,255,.9);color:var(--ink-3);font-size:13px;font-weight:600;cursor:pointer;
  backdrop-filter:blur(8px);
}
.login-fab:hover{color:var(--ink);}
.admin-bar{
  position:fixed;left:50%;transform:translateX(-50%);bottom:calc(20px + env(safe-area-inset-bottom,0px));z-index:60;
  display:flex;align-items:center;gap:6px;padding:6px;border-radius:999px;
  background:var(--ink);color:#fff;box-shadow:0 10px 30px rgba(12,20,36,.25);font-size:14px;
}
.admin-bar-user{padding:0 12px;color:#9AA4B8;font-weight:500;}
.edit-switch{display:flex;align-items:center;gap:10px;height:36px;padding:0 14px 0 10px;border-radius:999px;border:none;background:rgba(255,255,255,.08);color:#fff;cursor:pointer;font-size:14px;font-weight:600;}
.edit-switch-track{position:relative;width:34px;height:20px;border-radius:999px;background:#4A5468;transition:background .15s;}
.edit-switch-thumb{position:absolute;top:2px;left:2px;width:16px;height:16px;border-radius:50%;background:#fff;transition:transform .15s;}
.edit-switch[aria-pressed="true"] .edit-switch-track{background:var(--accent);}
.edit-switch[aria-pressed="true"] .edit-switch-thumb{transform:translateX(14px);}
.admin-bar-logout{height:36px;padding:0 14px;border-radius:999px;border:none;background:transparent;color:#9AA4B8;cursor:pointer;font-size:14px;font-weight:600;}
.admin-bar-logout:hover{color:#fff;}

/* ---------- modal / toast ---------- */
.modal-backdrop{position:fixed;inset:0;z-index:90;background:rgba(10,16,32,.55);display:flex;align-items:center;justify-content:center;padding:20px;}
.modal{width:100%;max-width:380px;background:#fff;border-radius:var(--r-lg);padding:32px;box-shadow:0 24px 60px rgba(10,16,32,.3);}
.modal h3{font-size:21px;font-weight:700;letter-spacing:-0.02em;}
.modal label{display:block;margin-top:20px;margin-bottom:8px;font-size:14px;font-weight:600;color:var(--ink-2);}
.modal input{width:100%;height:48px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-sm);font-family:inherit;font-size:15px;color:var(--ink);background:#fff;}
.modal input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(47,107,255,.15);}
.form-error{margin-top:14px;font-size:14px;color:var(--danger);}
.modal-wide{max-width:520px;max-height:calc(100vh - 40px);overflow-y:auto;}
.modal textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--r-sm);font-family:inherit;font-size:15px;line-height:1.6;color:var(--ink);background:#fff;resize:vertical;}
.modal textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(47,107,255,.15);}
.req{color:var(--danger);}
.file-drop{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;min-height:150px;padding:18px;border:1.5px dashed var(--line);border-radius:var(--r-sm);background:var(--bg-soft);text-align:center;color:var(--ink-3);font-size:14px;transition:border-color .15s,background-color .15s;}
.file-drop:hover,.file-drop.is-dragover{border-color:var(--accent);background:var(--accent-soft);}
.file-drop input[type="file"]{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer;}
.file-drop img{max-height:180px;width:auto;max-width:100%;border-radius:6px;}
.file-drop small{font-size:12.5px;color:var(--ink-3);}
.file-drop-text{word-break:break-all;}
.modal-actions .btn:disabled{opacity:.6;cursor:default;}
.modal-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:28px;}
.modal-actions .btn{height:48px;}
.toast{
  position:fixed;left:50%;top:calc(var(--header-h) + 16px);transform:translate(-50%,-8px);z-index:95;
  background:var(--ink);color:#fff;padding:12px 20px;border-radius:var(--r-sm);font-size:14.5px;font-weight:500;
  opacity:0;pointer-events:none;transition:opacity .2s, transform .2s;max-width:calc(100vw - 40px);text-align:center;
}
.toast.show{opacity:1;transform:translate(-50%,0);}
.toast.error{background:var(--danger);}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .split{grid-template-columns:1fr;gap:48px;}
  .split-head{position:static;}
  .product-body{padding:44px 40px;}
}
@media (max-width:860px){
  :root{--header-h:64px;}
  .main-nav,.header-cta{display:none;}
  .menu-btn{display:block;}
  .mobile-nav{display:none;flex-direction:column;padding:8px 28px 20px;border-top:1px solid var(--line);background:#fff;}
  .mobile-nav.open{display:flex;}
  .mobile-nav a{padding:14px 0;font-size:17px;font-weight:600;border-bottom:1px solid var(--line);}
  .brand-logo{height:28px;}

  .hero{flex-direction:column;align-items:stretch;min-height:0;}
  .hero-inner{padding-top:64px;padding-bottom:40px;order:1;}
  .hero-canvas{position:relative;order:2;height:340px;}
  .hero-shade{display:none;}
  .hero-lede{font-size:16.5px;}

  .section{padding:88px 0;}
  .section-head{margin-bottom:40px;}
  .product{grid-template-columns:1fr;}
  .product:nth-child(even) .product-media{order:0;} /* 모바일은 항상 이미지가 위 */
  .product-media{min-height:0;padding:24px;}
  .product-media.has-upload{aspect-ratio:4/3;}
  .product-media.has-upload img{inset:16px;width:calc(100% - 32px);height:calc(100% - 32px);}
  .media-tools{right:12px;bottom:12px;}
  .product-body{padding:32px 24px 36px;}
  .stat-grid{grid-template-columns:repeat(2,1fr);margin-top:56px;}
  .stat:nth-child(3){padding-left:0;border-left:none;}
  .stat:nth-child(n+3){padding-top:28px;}
  .hist-group{grid-template-columns:1fr;gap:12px;}
  .hist-item{grid-template-columns:64px minmax(0,1fr) auto;}
  .contact-grid{grid-template-columns:1fr;gap:48px;}
  .contact-form-wrap{padding:28px 20px;}
  .project-viewport{--pj-gap:16px;--pj-per-view:2;}
  .project-title{font-size:16.5px;}
  .cf-row{grid-template-columns:1fr;gap:0;}
  .site-footer{padding-top:88px;}
  .admin-bar{left:12px;right:12px;transform:none;justify-content:space-between;}
  .login-fab{height:32px;padding:0 12px;font-size:12px;opacity:.8;}
}
@media (max-width:480px){
  .wrap{padding-left:20px;padding-right:20px;}
  .project-viewport{--pj-per-view:1;}
  .btn{height:48px;padding:0 20px;}
  .hero-cta .btn{flex:1;}
  .contact-list > div{grid-template-columns:80px minmax(0,1fr);}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *{transition:none !important;}
}