:root{
  --navy:#0f2344;
  --blue:#2563eb;
  --blue-dark:#1746b2;
  --text:#1f2937;
  --muted:#667085;
  --line:#e5eaf2;
  --bg:#ffffff;
  --soft:#f7f9fc;
  --card:#ffffff;
  --shadow:0 18px 45px rgba(15,35,68,.08);
  --radius:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Malgun Gothic","맑은 고딕",Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.7;letter-spacing:-.02em}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1180px,calc(100% - 48px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.nav-wrap{height:82px;display:flex;align-items:center;justify-content:space-between;gap:36px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;color:var(--navy)}
.brand-mark{width:34px;height:34px;background:url("images/favicon.svg") center/contain no-repeat;flex:none}
.brand small{display:block;font-size:13px;font-weight:700;color:var(--navy);opacity:.8;line-height:1.1}
.menu{display:flex;gap:42px;align-items:center;font-weight:700;font-size:15px;color:#1f2a44}
.menu a{position:relative;padding:28px 0;color:#17213a}
.menu a.active,.menu a:hover{color:var(--blue)}
.menu a.active::after,.menu a:hover::after{content:"";position:absolute;left:0;right:0;bottom:18px;height:3px;background:var(--blue);border-radius:99px}
.hero{padding:82px 0 72px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#fff 0%,#fbfdff 100%)}
.hero-grid{display:grid;grid-template-columns:.85fr 1.35fr;align-items:center;gap:54px}
.hero h1{margin:0 0 8px;font-size:78px;line-height:1.03;letter-spacing:-.06em;color:var(--navy)}
.hero .role{font-size:44px;font-weight:800;color:var(--blue);line-height:1.1;margin-bottom:28px;letter-spacing:-.04em}
.hero p{font-size:19px;color:#263247;margin:0 0 32px;max-width:500px;word-break:keep-all}
.btn{display:inline-flex;align-items:center;justify-content:center;min-width:178px;height:52px;border-radius:8px;border:1px solid var(--navy);font-weight:800;font-size:16px;transition:.2s}
.btn-primary{color:#fff;background:var(--blue);border-color:var(--blue);box-shadow:0 12px 24px rgba(37,99,235,.18)}
.btn-primary:hover{background:var(--blue-dark);border-color:var(--blue-dark)}
.btn-outline{color:var(--navy);background:#fff}
.btn-outline:hover{background:#f2f6fd;color:var(--blue);border-color:var(--blue)}
.hero-visual{padding:0}
.hero-visual img{width:100%;max-width:760px;margin-left:auto}
.section{padding:48px 0;border-bottom:1px solid var(--line)}
.section-title{font-size:30px;line-height:1.1;color:var(--navy);margin:0 0 28px;font-weight:800;position:relative;display:inline-block;letter-spacing:-.03em}
.section-title::after{content:"";display:block;width:48px;height:3px;background:var(--blue);border-radius:99px;margin-top:12px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.about-card{display:grid;grid-template-columns:170px 1fr;gap:36px;align-items:center;padding:36px 46px;width:min(920px,100%);margin:0 auto}
.about-icon{width:118px;height:118px;margin:auto;border-radius:24px;background:#f6f9fe;display:grid;place-items:center;color:var(--navy)}
.about-icon svg,.skill-icon svg{width:68px;height:68px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.about-card p{margin:0 0 24px;font-size:17px;color:#2d3748;word-break:keep-all}
.chips{display:flex;flex-wrap:wrap;gap:16px}
.chip{display:inline-flex;align-items:center;gap:8px;min-height:42px;padding:8px 20px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--navy);font-weight:800}
.chip svg{width:22px;height:22px;stroke:var(--blue);fill:none;stroke-width:2}
.skills-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:18px}
.skill-card{padding:30px 18px;text-align:center;min-height:230px;display:flex;flex-direction:column;align-items:center;justify-content:flex-start}
.skill-icon{width:76px;height:76px;border-radius:20px;display:grid;place-items:center;color:var(--navy);margin-bottom:16px;background:#fbfdff}
.skill-card h3{margin:0 0 10px;color:var(--navy);font-size:19px;line-height:1.3}
.skill-card p{margin:0;color:#4b5563;font-size:14.5px;word-break:keep-all}
.career-wrap{display:grid;grid-template-columns:130px 1fr;gap:30px;align-items:stretch;width:min(980px,100%);margin:0 auto}
.timeline{position:relative;padding-top:34px}
.timeline::before{content:"";position:absolute;left:64px;top:0;bottom:0;width:2px;background:#c8d5e7}
.dot{width:14px;height:14px;border:3px solid var(--blue);background:#fff;border-radius:50%;position:absolute;left:58px}
.dot.one{top:38px}.dot.two{top:150px}
.career-card{padding:0 34px}
.job{display:grid;grid-template-columns:1fr;gap:16px;padding:30px 0;border-bottom:1px solid var(--line)}
.job:last-child{border-bottom:0}
.job-left{display:flex;gap:18px;align-items:center;min-width:0}
.job-icon{width:62px;height:62px;border-radius:50%;display:grid;place-items:center;background:var(--navy);color:#fff;flex:none}
.job-icon.gray{background:#6b7280}.job-icon svg{width:34px;height:34px;stroke:currentColor;fill:none;stroke-width:1.8}
.job h3{margin:0 0 3px;font-size:20px;color:var(--navy);white-space:nowrap;letter-spacing:-0.03em;line-height:1.35}
.job .date{color:var(--blue);font-weight:800}
.job .company{color:#3d4658;font-weight:700;margin-left:6px}
.job ul,.project-card ul{margin:0;padding-left:22px;color:#2f3b4f}
.project-card li{line-height:1.65;margin-bottom:8px}
.job ul{padding-left:98px;max-width:100%;}
.projects-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.project-card{padding:22px 22px 24px;min-height:252px;display:flex;flex-direction:column}
.project-card h3{margin:0 0 16px;color:var(--navy);font-size:20px}
.project-head{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:16px}
.project-head .tags{display:flex;flex-wrap:wrap;gap:8px;flex:1;align-content:flex-start}
.project-card img{width:158px;max-width:100%;flex:0 0 158px;border-radius:12px;border:1px solid var(--line);background:#f8fafc;align-self:flex-start}
.tags{grid-column:1/-1;display:flex;gap:8px;flex-wrap:wrap;margin-top:2px}.tag{font-size:12px;padding:4px 9px;border-radius:999px;background:#eef4ff;color:#2563eb;font-weight:800}
.contact-card{display:grid;grid-template-columns:repeat(2,1fr);gap:0;padding:28px 24px;align-items:center}
.contact-item{display:grid;grid-template-columns:58px 1fr;gap:14px;align-items:center;padding:0 20px;border-right:1px solid var(--line);min-height:90px}.contact-item:last-child{border-right:0}
.contact-icon{width:54px;height:54px;border-radius:50%;background:#f1f6ff;display:grid;place-items:center;color:var(--navy)}.contact-icon svg{width:30px;height:30px;stroke:currentColor;fill:none;stroke-width:1.8}
.contact-item strong{display:block;color:var(--navy)}.contact-item span,.contact-item a{color:#4b5563;font-size:14px}
.footer{padding:24px 0;text-align:center;color:#8a94a6;font-size:14px}
.page-hero{padding:70px 0 44px;background:#fbfdff;border-bottom:1px solid var(--line)}.page-hero h1{font-size:48px;color:var(--navy);margin:0 0 10px}.page-hero p{font-size:18px;color:#4b5563;margin:0;max-width:760px;word-break:keep-all}
.detail-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}.detail-card{padding:30px}.detail-card h2{margin:0 0 14px;color:var(--navy)}.detail-card p{margin:0;color:#445064}.detail-card ul{margin:12px 0 0;padding-left:18px}.full{grid-column:1/-1}
.cert-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 28px;margin-top:12px!important}
.cert-list li{line-height:1.7}
@media(max-width:720px){.cert-list{grid-template-columns:1fr}}

@media(max-width:1024px){.hero-grid{grid-template-columns:1fr;gap:34px}.hero-visual img{margin:0 auto;max-width:760px}.skills-grid{grid-template-columns:repeat(3,1fr)}.projects-grid{grid-template-columns:1fr}.contact-card{grid-template-columns:repeat(2,1fr)}.contact-item:nth-child(2){border-right:0}.contact-item{border-bottom:1px solid var(--line);padding:18px 20px}.contact-item:nth-child(n+3){border-bottom:0}.menu{gap:22px}.hero h1{font-size:62px}}

@media(max-width:980px){.career-card{padding:0 24px}}
@media(max-width:720px){.job ul{padding-left:18px}.container{width:min(100% - 28px,1180px)}.nav-wrap{height:auto;min-height:76px;align-items:flex-start;flex-direction:column;padding:16px 0}.menu{width:100%;overflow-x:auto;gap:22px;font-size:14px}.menu a{padding:8px 0 14px}.menu a.active::after,.menu a:hover::after{bottom:6px}.hero{padding:54px 0}.hero h1{font-size:54px}.hero .role{font-size:34px}.hero p{font-size:16px}.about-card{grid-template-columns:1fr;padding:28px}.skills-grid{grid-template-columns:1fr}.career-wrap{grid-template-columns:1fr}.timeline{display:none}.job{grid-template-columns:1fr}.contact-card{grid-template-columns:1fr}.contact-item{border-right:0!important;border-bottom:1px solid var(--line)!important}.contact-item:last-child{border-bottom:0!important}.detail-grid{grid-template-columns:1fr}.project-card{grid-template-columns:1fr}.project-head{flex-direction:column;gap:12px}.project-card img{width:100%;max-width:220px}}

/* Mobile: prevent career headings from causing page-wide horizontal overflow */
@media(max-width:720px){
  .job h3{
    white-space:normal;
    overflow-wrap:anywhere;
  }
  .job-left>div{
    min-width:0;
  }
}
.project-summary{margin:0 0 12px;color:#4b5563;font-size:14px;line-height:1.55}.project-link{display:inline-flex;align-items:center;justify-content:center;align-self:flex-start;margin-top:auto;padding:10px 14px;border-radius:10px;background:var(--navy);color:#fff;text-decoration:none;font-size:14px;font-weight:700}.project-link:hover{background:var(--blue)}.project-phone-preview{width:118px!important;height:166px;object-fit:cover;object-position:top;flex:0 0 118px!important}.eyebrow{margin:0 0 12px;color:var(--blue);font-weight:800;letter-spacing:0}.case-hero{padding-bottom:48px}.case-hero-grid{display:grid;grid-template-columns:minmax(0,1.15fr) 320px;gap:42px;align-items:center}.hero-link{margin-top:18px}.case-hero-shot{display:flex;justify-content:center}.case-hero-shot img{width:240px;max-height:470px;object-fit:cover;object-position:top;border-radius:24px;border:1px solid var(--line);box-shadow:0 22px 45px rgba(15,23,42,.16);background:#fff}.detail-card h2{margin:0 0 18px;color:var(--navy);font-size:22px}.detail-card p{margin:0;color:#374151;line-height:1.75}.info-grid,.feature-grid,.entity-grid,.metric-grid,.migration-grid{display:grid;gap:14px}.info-grid{grid-template-columns:repeat(2,1fr)}.info-grid div,.feature-grid div,.entity-grid div,.metric-grid div,.migration-grid div,.timeline-list div,.bug-compare div{padding:14px;border:1px solid var(--line);border-radius:12px;background:#f8fafc}.info-grid .wide{grid-column:1/-1}.info-grid strong,.feature-grid strong,.entity-grid strong,.metric-grid strong,.migration-grid strong,.timeline-list strong,.bug-compare strong{display:block;color:var(--navy);margin-bottom:6px}.info-grid span,.feature-grid span,.entity-grid span,.migration-grid span,.timeline-list span,.bug-compare span{color:#4b5563;line-height:1.55}.feature-grid{grid-template-columns:repeat(2,1fr)}.entity-grid{grid-template-columns:repeat(4,1fr)}.metric-grid{grid-template-columns:repeat(5,1fr)}.metric-grid div{text-align:center}.metric-grid span{display:block;color:var(--blue);font-size:22px;font-weight:800}.case-list{margin:0;padding-left:22px;color:#374151;line-height:1.75}.note{margin-top:16px!important;color:#64748b!important}.table-wrap{width:100%;overflow-x:auto}.case-table{width:100%;border-collapse:collapse;min-width:680px}.case-table th,.case-table td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.case-table th{color:var(--navy);background:#f8fafc;font-size:14px}.case-table td{color:#374151;font-size:14px}.migration-grid{grid-template-columns:repeat(3,1fr);margin-bottom:16px}.timeline-list{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.bug-compare{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:18px}.screenshot-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.screenshot-grid figure{margin:0}.phone-shot{display:block;width:100%;max-height:520px;object-fit:cover;object-position:top;border-radius:14px;border:1px solid var(--line);background:#fff}.screenshot-grid figcaption{margin-top:10px;color:var(--navy);font-weight:700;text-align:center;font-size:14px}
@media(max-width:1024px){.case-hero-grid{grid-template-columns:1fr}.case-hero-shot{justify-content:flex-start}.entity-grid,.metric-grid,.timeline-list{grid-template-columns:repeat(2,1fr)}.screenshot-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:720px){.detail-grid{grid-template-columns:minmax(0,1fr)}.detail-grid>*{min-width:0}.detail-grid>.full{grid-column:auto}.case-hero-grid{gap:24px}.case-hero-shot img{width:190px;max-height:360px;border-radius:18px}.info-grid,.feature-grid,.entity-grid,.metric-grid,.migration-grid,.timeline-list,.bug-compare,.screenshot-grid{grid-template-columns:1fr}.phone-shot{max-height:360px}.case-table{min-width:560px}.project-link{width:100%}.project-phone-preview{width:100%!important;max-width:180px!important;height:230px;flex:auto!important}}