:root{
  --paper:#FAF7F1;
  --paper-deep:#F3EDE1;
  --ink:#20261F;
  --ink-soft:#4B5248;
  --teal:#0F6E5D;
  --teal-deep:#0A4F42;
  --teal-soft:#E3EFEA;
  --brass:#A9793F;
  --line:#DED7C4;
  --serif: 'Noto Serif KR', serif;
  --sans: 'Noto Sans KR', sans-serif;
}
*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--sans);
  background:var(--paper);
  color:var(--ink);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%; display:block;}
.wrap{max-width:1120px; margin:0 auto; padding:0 32px;}
a{color:inherit; text-decoration:none;}

@media (prefers-reduced-motion: reduce){
  *{animation:none !important; transition:none !important;}
}

/* NAV */
header.nav{
  position:sticky; top:0; z-index:50;
  background:rgba(250,247,241,0.9);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding:18px 32px; max-width:1120px; margin:0 auto;
}
.logo{font-family:var(--serif); font-weight:700; font-size:20px; letter-spacing:0.02em;}
.logo span{color:var(--teal);}
.nav-links{display:flex; gap:28px; align-items:center; font-size:14px; color:var(--ink-soft);}
.nav-links a.active{color:var(--teal); font-weight:700;}
.lang-pill{
  border:1px solid var(--teal); color:var(--teal);
  border-radius:999px; padding:5px 14px; font-size:13px; font-weight:600;
}

section{padding:88px 0;}
.page-hero{padding:72px 0 56px; border-bottom:1px solid var(--line); background:var(--paper-deep);}
.page-eyebrow{font-size:13px; letter-spacing:0.14em; text-transform:uppercase; color:var(--brass); font-weight:700; margin-bottom:14px;}
.page-title{font-family:var(--serif); font-weight:700; font-size:clamp(28px,3.2vw,40px); line-height:1.35;}
.page-desc{margin-top:16px; color:var(--ink-soft); font-size:16px; max-width:640px;}

.section-head{max-width:640px; margin-bottom:52px;}
.section-label{font-size:13px; letter-spacing:0.14em; text-transform:uppercase; color:var(--brass); font-weight:700; margin-bottom:14px;}
h2.section-title{font-family:var(--serif); font-weight:600; font-size:clamp(24px,2.6vw,32px); color:var(--ink); line-height:1.4;}
.section-desc{margin-top:16px; color:var(--ink-soft); font-size:16px;}

.eyebrow{font-size:13px; letter-spacing:0.14em; text-transform:uppercase; color:var(--teal); font-weight:600; margin-bottom:18px;}
h1.headline{font-family:var(--serif); font-weight:600; font-size:clamp(28px, 3.4vw, 40px); line-height:1.42; color:var(--ink); margin-bottom:28px; letter-spacing:-0.01em;}

.compare-lines{margin:32px 0; font-family:var(--serif);}
.compare-lines p{font-size:19px; color:var(--ink-soft); margin-bottom:6px; padding-left:18px; border-left:2px solid var(--line);}
.compare-lines p.final{color:var(--teal-deep); font-weight:700; font-size:23px; border-left:2px solid var(--teal); margin-top:14px;}

.btn{display:inline-flex; align-items:center; gap:10px; background:var(--teal); color:#fff; padding:14px 28px; border-radius:6px; font-weight:600; font-size:15px;}
.btn.ghost{background:transparent; color:var(--teal); border:1px solid var(--teal);}
.hero-note{margin-top:14px; font-size:13px; color:var(--ink-soft);}

.hero{padding:96px 0 64px; position:relative; overflow:hidden;}
.hero-grid{display:grid; grid-template-columns:1.05fr 0.95fr; gap:56px; align-items:center;}
.hero-visual{position:relative;}
.device-frame{background:#fff; border-radius:18px; border:1px solid var(--line); box-shadow:0 30px 60px -20px rgba(32,38,31,0.25); overflow:hidden; transform:rotate(1.2deg);}
.device-frame img{width:100%;}
.device-tag{position:absolute; bottom:-18px; left:24px; background:var(--brass); color:#fff; font-size:12px; font-weight:600; padding:8px 16px; border-radius:6px; box-shadow:0 8px 18px rgba(169,121,63,0.35);}

.philosophy{background:var(--teal-deep); color:#EFEAE0;}
.philosophy .section-label{color:#B7D9CF;}
.philosophy h2.section-title{color:#fff;}
.philosophy .section-desc{color:#CFE3DC;}
.quote-block{font-family:var(--serif); font-size:clamp(20px,2.2vw,26px); line-height:1.7; max-width:820px; color:#fff; font-weight:500; border-left:3px solid #B7D9CF; padding-left:28px; margin-top:40px;}
.quote-block .fade{color:#A9C4BB; font-size:16px; font-family:var(--sans); font-weight:400; margin-top:22px; line-height:1.9;}

.principle-row{display:grid; grid-template-columns:repeat(3,1fr); gap:24px;}
.principle-card{background:#fff; border:1px solid var(--line); border-radius:10px; padding:32px 26px; text-align:center;}
.principle-num{font-family:var(--serif); font-size:14px; color:var(--brass); font-weight:700; margin-bottom:14px;}
.principle-title{font-family:var(--serif); font-size:20px; font-weight:600; margin-bottom:10px;}
.principle-owner{font-size:22px; font-weight:700; color:var(--teal); margin-bottom:8px;}
.principle-desc{font-size:14px; color:var(--ink-soft);}

.screens{background:var(--paper-deep);}
.screen-toggle-note{display:inline-flex; gap:8px; align-items:center; font-size:13px; color:var(--ink-soft); border:1px dashed var(--line); border-radius:999px; padding:6px 14px; margin-bottom:36px;}
.screen-pair{display:grid; grid-template-columns:1fr 1fr; gap:32px;}
.screen-card{background:#fff; border-radius:14px; border:1px solid var(--line); overflow:hidden; box-shadow:0 20px 40px -24px rgba(32,38,31,0.2);}
.screen-card img{width:100%;}
.screen-caption{padding:18px 22px; font-size:14px; color:var(--ink-soft); border-top:1px solid var(--line);}
.screen-caption b{color:var(--ink); font-weight:600;}

.cat-grid{display:grid; grid-template-columns:repeat(5,1fr); gap:1px; background:var(--line); border:1px solid var(--line); border-radius:12px; overflow:hidden;}
.cat-cell{background:#fff; padding:26px 20px; min-height:150px; display:flex; flex-direction:column; justify-content:space-between;}
.cat-idx{font-family:var(--serif); font-size:13px; color:var(--brass); font-weight:700;}
.cat-name{font-family:var(--serif); font-size:18px; font-weight:600; margin-top:24px;}
.cat-desc{font-size:12.5px; color:var(--ink-soft); margin-top:6px; line-height:1.5;}

.arch-row{display:grid; grid-template-columns:repeat(3,1fr); gap:24px;}
.arch-card{border:1px solid var(--line); border-radius:10px; padding:30px 26px; background:#fff; position:relative;}
.arch-card::before{content:''; position:absolute; top:0; left:0; width:100%; height:3px; background:var(--teal); border-radius:10px 10px 0 0;}
.arch-title{font-family:var(--serif); font-size:18px; font-weight:600; margin-bottom:10px;}
.arch-desc{font-size:14px; color:var(--ink-soft);}

.letter-section{padding:100px 0;}
.letter-wrap{max-width:760px; margin:0 auto; position:relative;}
.index-card{background:#fffdf8; border:1px solid var(--line); box-shadow:0 24px 50px -28px rgba(32,38,31,0.35); padding:52px 48px; position:relative; background-image: repeating-linear-gradient(to bottom, transparent, transparent 34px, var(--teal-soft) 35px); background-position: 0 100px;}
.index-card::before{content:'HYSS 365 · FAMILY MEMO'; position:absolute; top:-13px; left:40px; background:var(--brass); color:#fff; font-size:11px; letter-spacing:0.1em; padding:5px 14px; border-radius:3px; font-weight:700;}
.index-card .letter-body{font-family:var(--serif); font-size:16.5px; line-height:2.2; color:var(--ink); white-space:pre-line;}
.index-card .letter-sign{margin-top:24px; text-align:right; font-family:var(--serif); font-weight:700; color:var(--teal-deep);}

/* ABOUT PAGE */
.info-table{width:100%; border-collapse:collapse; margin-top:24px;}
.info-table tr{border-bottom:1px solid var(--line);}
.info-table th, .info-table td{text-align:left; padding:16px 8px; font-size:15px;}
.info-table th{width:180px; color:var(--ink-soft); font-weight:600;}
.placeholder{color:#B8A98C; font-style:italic;}

/* CONTACT PAGE */
.contact-grid{display:grid; grid-template-columns:1fr 1fr; gap:56px;}
.contact-info-card{background:#fff; border:1px solid var(--line); border-radius:12px; padding:36px;}
.contact-info-card h3{font-family:var(--serif); font-size:18px; margin-bottom:6px;}
.contact-info-card .val{color:var(--ink-soft); margin-bottom:22px; font-size:15px;}
.form-mock label{display:block; font-size:13px; font-weight:600; color:var(--ink-soft); margin-bottom:6px; margin-top:18px;}
.form-mock input, .form-mock textarea{
  width:100%; border:1px solid var(--line); border-radius:6px; padding:12px 14px; font-family:var(--sans); font-size:14px; background:#fff;
}
.form-mock textarea{min-height:120px; resize:vertical;}
.form-note{font-size:12px; color:var(--ink-soft); margin-top:10px;}

/* FOOTER */
footer{background:var(--ink); color:#D9D4C6; padding:56px 0 36px;}
.footer-grid{display:flex; justify-content:space-between; flex-wrap:wrap; gap:24px; margin-bottom:32px;}
.footer-logo{font-family:var(--serif); font-size:20px; font-weight:700; color:#fff;}
.footer-slogan{font-size:13px; color:#9BA396; margin-top:8px;}
.footer-meta{font-size:13px; color:#9BA396; line-height:1.9;}
.footer-legal{font-size:12px; color:#77806F; line-height:1.9; margin-top:6px;}
.footer-bottom{border-top:1px solid #3A4238; padding-top:22px; font-size:12px; color:#77806F; display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;}
.footer-bottom a{color:#9BA396;}

@media (max-width: 860px){
  .hero-grid, .principle-row, .screen-pair, .arch-row, .contact-grid{grid-template-columns:1fr;}
  .cat-grid{grid-template-columns:repeat(2,1fr);}
  .hero{padding-top:64px;}
  .device-frame{transform:none;}
  .index-card{padding:36px 24px;}
}