/* ===== 색상 · 글꼴 (여기만 바꾸면 사이트 전체 분위기가 바뀝니다) ===== */
:root {
  --paper: #F4F3EE;
  --paper-card: #FBFAF7;
  --grid: #E3E2DB;
  --ink: #1C2430;
  --ink-soft: #3F4A57;
  --muted: #5B6572;
  --line: #C9CCD1;
  --accent: #C2410C;
  --accent-dark: #9A3412;
  --pen: #1F4FB8;
  --hl-yellow: 255, 214, 10;
  --hl-mint: 94, 234, 172;
  --hl-pink: 255, 122, 168;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --sans: 'IBM Plex Sans KR', system-ui, sans-serif;
  --hand: 'Nanum Pen Script', cursive;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background-color: var(--paper);
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.6;
}
a { color: var(--accent); }
a:hover { color: var(--accent-dark); }
img { max-width: 100%; height: auto; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px 80px; }
.mono { font-family: var(--mono); }

/* ===== 노트 필기 효과 ===== */
mark { color: inherit; background: none; }
.hl, .hl-mint, .hl-pink {
  background-repeat: no-repeat;
  background-position: 0 88%;
  padding: 0 .14em;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}
.hl { background-image: linear-gradient(100deg, rgba(var(--hl-yellow), 0) 0%, rgba(var(--hl-yellow), .8) 2.5%, rgba(var(--hl-yellow), .55) 45%, rgba(var(--hl-yellow), .7) 96%, rgba(var(--hl-yellow), 0) 100%); background-size: 100% 58%; }
.hl-mint { background-image: linear-gradient(100deg, rgba(var(--hl-mint), 0) 0%, rgba(var(--hl-mint), .6) 3%, rgba(var(--hl-mint), .42) 50%, rgba(var(--hl-mint), .55) 96%, rgba(var(--hl-mint), 0) 100%); background-size: 100% 50%; }
.hl-pink { background-image: linear-gradient(100deg, rgba(var(--hl-pink), 0) 0%, rgba(var(--hl-pink), .55) 3%, rgba(var(--hl-pink), .38) 50%, rgba(var(--hl-pink), .5) 96%, rgba(var(--hl-pink), 0) 100%); background-size: 100% 52%; }
.ul { position: relative; display: inline-block; }
.ul-line { position: absolute; left: -2%; bottom: -.32em; width: 104%; height: .4em; overflow: visible; pointer-events: none; }
.ul-line path { fill: none; stroke: var(--accent); stroke-width: 3; stroke-linecap: round; }
.pen { font-family: var(--hand); color: var(--pen); font-weight: 400; line-height: 1.1; font-size: 1.45em; display: inline-block; transform: rotate(-2deg); }
.circle { position: relative; display: inline-block; padding: 2px 6px; }
.circle svg { position: absolute; left: -10%; top: -20%; width: 120%; height: 140%; overflow: visible; pointer-events: none; }
.circle path { fill: none; stroke: var(--pen); stroke-width: 2; stroke-linecap: round; }
.sticky { position: absolute; top: -18px; right: 14px; z-index: 1; padding: 4px 14px; background: #FFE45C; color: var(--ink); font-family: var(--hand); font-size: 24px; transform: rotate(4deg); box-shadow: 0 2px 0 rgba(28, 36, 48, .15); }

/* ===== 머리말 ===== */
.site-header { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 16px; padding: 24px 0; border-bottom: 2px solid var(--ink); }
.logo { font-family: var(--mono); font-weight: 600; font-size: 18px; color: var(--ink); text-decoration: none; }
.site-nav { display: flex; flex-wrap: wrap; gap: 4px; font-family: var(--mono); font-size: 14px; }
.site-nav a { padding: 12px 14px; color: var(--ink); text-decoration: none; }
.site-nav a:hover { color: var(--accent); }

/* ===== 첫 화면 ===== */
.hero { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 32px; padding: 72px 0 56px; align-items: end; }
.hero-text { display: flex; flex-direction: column; gap: 20px; }
.eyebrow { margin: 0; font-family: var(--mono); font-size: 14px; color: var(--accent); letter-spacing: .08em; }
.hero h1 { margin: 0; font-size: clamp(36px, 5vw, 52px); line-height: 1.3; font-weight: 700; letter-spacing: -.02em; }
.hero h1 .ul-line path { stroke-width: 4; }
.hero-note { margin: -4px 0 0 4px; font-size: 30px; transform: rotate(-2deg); transform-origin: left center; }
.hero-desc { margin: 0; font-size: 18px; line-height: 1.7; color: var(--ink-soft); max-width: 520px; }
.btns { display: flex; flex-wrap: wrap; gap: 12px; padding-top: 8px; }
.btn { display: inline-flex; align-items: center; min-height: 48px; padding: 0 22px; border: 1.5px solid var(--ink); color: var(--ink); text-decoration: none; font-weight: 500; background: transparent; font: inherit; cursor: pointer; }
.btn-dark { background: var(--ink); color: var(--paper); }
.btn:hover { color: var(--accent); }
.btn-dark:hover { color: #fff; background: #000; }
.title-block { border-collapse: collapse; width: 100%; font-size: 15px; background: var(--paper-card); border: 2px solid var(--ink); }
.title-block th, .title-block td { padding: 12px 16px; border: 1px solid var(--ink); text-align: left; vertical-align: top; }
.title-block th { font-family: var(--mono); font-weight: 500; font-size: 12px; width: 34%; }

/* ===== 섹션 공통 ===== */
.section { display: flex; flex-direction: column; gap: 24px; padding: 48px 0; }
.section-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 12px; border-bottom: 1px solid var(--ink); padding-bottom: 12px; }
.section-head h2 { margin: 0; font-size: 30px; font-weight: 700; display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; }
.section-no { font-family: var(--mono); color: var(--accent); font-size: 18px; }
.section-head .more { font-family: var(--mono); font-size: 14px; }
.section-head .pen { font-size: 26px; transform: rotate(-4deg); }
.empty { padding: 24px; border: 1.5px dashed var(--line); color: var(--muted); font-family: var(--mono); font-size: 14px; }

/* ===== CAD 카드 ===== */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; }
.card { position: relative; background: var(--paper-card); border: 2px solid var(--ink); display: flex; flex-direction: column; color: var(--ink); text-decoration: none; transition: transform .15s; }
.card:hover { color: var(--ink); transform: translateY(-3px); }
.card-img { aspect-ratio: 4 / 3; display: flex; align-items: center; justify-content: center; border-bottom: 1px solid var(--ink); background: repeating-linear-gradient(45deg, var(--paper-card) 0 10px, #EFEDE6 10px 11px); font-family: var(--mono); font-size: 13px; color: var(--muted); overflow: hidden; }
.card-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.card-body { padding: 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.card-body h3 { margin: 0; font-size: 20px; }
.card-body p { margin: 0; font-size: 15px; line-height: 1.6; color: var(--ink-soft); }
.card-meta { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--ink); font-family: var(--mono); font-size: 12px; }
.card-meta span { padding: 10px 12px; border-right: 1px solid var(--ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.card-meta span:last-child { border-right: 0; }

/* ===== 소프트웨어 표 ===== */
.table-box { overflow-x: auto; border: 2px solid var(--ink); background: var(--paper-card); }
.sw-table { border-collapse: collapse; width: 100%; min-width: 680px; font-size: 15px; }
.sw-table thead tr { font-family: var(--mono); font-size: 12px; text-align: left; background: var(--ink); color: var(--paper); }
.sw-table th { padding: 12px 16px; font-weight: 500; text-align: left; }
.sw-table td { padding: 16px; vertical-align: top; }
.sw-table tbody tr { border-bottom: 1px solid var(--line); }
.sw-table tbody tr:last-child { border-bottom: 0; }
.sw-code { font-family: var(--mono); color: var(--accent); white-space: nowrap; }
.sw-title a { color: var(--ink); font-weight: 600; }
.sw-title .pen { display: block; font-size: 22px; margin-top: 4px; }
.sw-desc { color: var(--ink-soft); }
.sw-desc .repo { display: inline-block; margin-top: 6px; font-family: var(--mono); font-size: 12px; }
.sw-kind { font-family: var(--mono); font-size: 13px; white-space: nowrap; }

/* ===== 설계 노트 ===== */
.notes { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); border: 2px solid var(--ink); background: var(--paper-card); }
.note { display: flex; flex-direction: column; gap: 8px; padding: 24px; border-right: 1px solid var(--ink); border-bottom: 1px solid var(--ink); margin: 0 -1px -1px 0; color: var(--ink); text-decoration: none; }
.note:hover { color: var(--ink); background: #fff; }
.note-meta { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.note-title { font-size: 19px; font-weight: 600; line-height: 1.45; }
.note-title .ul-line path { stroke: #E11D74; stroke-width: 2; }
.note-sum { font-size: 15px; color: var(--ink-soft); line-height: 1.6; }

/* ===== 소개 ===== */
.about { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 32px; padding: 48px 0 0; border-top: 2px solid var(--ink); margin-top: 24px; }
.about-text { display: flex; flex-direction: column; gap: 12px; }
.about-text h2 { margin: 0; font-size: 30px; font-weight: 700; }
.about-text p { margin: 0; font-size: 16px; line-height: 1.75; color: var(--ink-soft); }
.about-text .pen { font-size: 28px; color: var(--pen); margin-top: 4px; transform: rotate(-1.5deg); }
.contact { margin: 0; display: grid; grid-template-columns: max-content 1fr; gap: 12px 24px; font-size: 15px; align-content: start; }
.contact dt { font-family: var(--mono); font-size: 13px; color: var(--muted); }
.contact dd { margin: 0; }
.site-footer { margin-top: 64px; padding-top: 16px; border-top: 1px solid var(--line); font-family: var(--mono); font-size: 12px; color: var(--muted); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; }
.site-footer a { color: var(--muted); }

/* ===== 글 상세 페이지 ===== */
.post-head { padding: 56px 0 32px; display: flex; flex-direction: column; gap: 16px; border-bottom: 2px solid var(--ink); }
.post-head h1 { margin: 0; font-size: clamp(30px, 4.4vw, 44px); line-height: 1.3; letter-spacing: -.02em; }
.post-head .lead { margin: 0; font-size: 18px; color: var(--ink-soft); max-width: 760px; }
.post-sheet { border-collapse: collapse; font-family: var(--mono); font-size: 13px; background: var(--paper-card); border: 2px solid var(--ink); align-self: flex-start; }
.post-sheet th, .post-sheet td { padding: 8px 14px; border: 1px solid var(--ink); text-align: left; }
.post-sheet th { font-weight: 500; color: var(--muted); }
.post-cover { margin: 32px 0 0; border: 2px solid var(--ink); background: var(--paper-card); }
.post-cover img { display: block; width: 100%; }
.prose { max-width: 760px; padding: 32px 0; font-size: 17px; line-height: 1.85; }
.prose h2 { font-size: 26px; margin: 2em 0 .6em; padding-bottom: 8px; border-bottom: 1px solid var(--ink); }
.prose h3 { font-size: 21px; margin: 1.6em 0 .5em; }
.prose img { border: 2px solid var(--ink); background: var(--paper-card); display: block; margin: 8px 0; }
.prose blockquote { margin: 1.4em 0; padding: 4px 20px; border-left: 4px solid var(--accent); background: var(--paper-card); color: var(--ink-soft); }
.prose code { font-family: var(--mono); font-size: .9em; background: #E9E7DF; padding: 1px 5px; }
.prose pre { background: var(--ink); color: var(--paper); padding: 16px 20px; overflow-x: auto; }
.prose pre code { background: none; padding: 0; }
.prose table { border-collapse: collapse; width: 100%; font-size: 15px; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--ink); padding: 8px 12px; text-align: left; }
.prose th { background: var(--paper-card); font-family: var(--mono); font-size: 13px; }
.back { display: inline-flex; align-items: center; min-height: 44px; font-family: var(--mono); font-size: 14px; }

@media (max-width: 600px) {
  .hero { padding: 48px 0 40px; }
  .section-head h2, .about-text h2 { font-size: 26px; }
}

/* ===== 채용 어필 · 인사담당자 퀴즈 ===== */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); border: 0; }
.appeal-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 32px; align-items: start; }
.appeal ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 14px; counter-reset: appeal; }
.appeal li { counter-increment: appeal; position: relative; padding: 16px 18px 16px 64px; background: var(--paper-card); border: 2px solid var(--ink); font-size: 16px; line-height: 1.7; color: var(--ink-soft); }
.appeal li::before { content: counter(appeal, decimal-leading-zero); position: absolute; left: 18px; top: 16px; font-family: var(--mono); font-weight: 600; color: var(--accent); }
.appeal li strong { color: var(--ink); }
.appeal-note { margin: 16px 0 0 8px; font-size: 28px; }
.quiz { position: relative; display: flex; flex-direction: column; gap: 12px; padding: 28px; background: #FFFDF2; border: 2px dashed var(--ink); }
.quiz-open { border-style: solid; background: var(--paper-card); }
.quiz-sticky { top: -16px; right: 18px; }
.quiz-q { margin: 0; font-size: 22px; font-weight: 700; line-height: 1.4; }
.quiz-help { margin: 0; font-size: 15px; color: var(--ink-soft); }
.quiz-row { display: flex; flex-wrap: wrap; gap: 8px; }
.quiz-row input { flex: 1 1 160px; min-width: 0; width: 100%; min-height: 48px; padding: 0 14px; border: 1.5px solid var(--ink); background: #fff; font: inherit; font-size: 17px; }
.quiz-error { margin: 0; color: #B91C1C; font-size: 15px; }
.quiz-error .pen { color: #B91C1C; font-size: 24px; }
.hr-bar { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 8px 16px; padding: 8px 16px; background: var(--ink); color: var(--paper); font-size: 14px; }
.hr-bar span { display: inline-flex; align-items: center; gap: 8px; }
.hr-bar button { min-height: 36px; padding: 0 12px; border: 1px solid var(--paper); background: transparent; color: var(--paper); font: inherit; font-size: 13px; cursor: pointer; }
.hr-tag { display: inline-block; vertical-align: middle; padding: 1px 6px; border: 1.5px solid var(--pen); color: var(--pen); font-family: var(--mono); font-size: 11px; font-weight: 600; letter-spacing: .04em; transform: rotate(-2deg); }
.title-block a, .btn svg { vertical-align: -3px; }
.about-locked { grid-template-columns: 1fr; }
.resume { padding: 0; }
.resume h3:first-child { margin-top: 0; }
.locked { max-width: 640px; }
.locked h1 { display: flex; align-items: center; gap: 10px; font-size: 28px; margin: 0; }

/* ===== 분야 · 규모 필터 ===== */
.filters { display: flex; flex-direction: column; gap: 10px; padding: 16px 18px; background: var(--paper-card); border: 2px solid var(--ink); }
.filter-row { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.filter-label { font-family: var(--mono); font-size: 12px; color: var(--muted); min-width: 44px; }
.chip { display: inline-flex; align-items: center; gap: 6px; min-height: 40px; padding: 0 14px; border: 1.5px solid var(--ink); background: #fff; color: var(--ink); text-decoration: none; font-size: 14px; }
.chip:hover { color: var(--ink); background: rgba(var(--hl-yellow), .35); }
.chip[aria-current="true"] { background: var(--ink); color: var(--paper); }
.chip[aria-current="true"] .chip-n { color: rgba(var(--hl-yellow), 1); }
.chip-n { font-family: var(--mono); font-size: 12px; color: var(--accent); }
.chip-off { border-color: var(--line); color: var(--muted); background: transparent; }
.chip-off .chip-n { color: var(--muted); }
.field-tags { display: flex; flex-wrap: wrap; gap: 4px; }
.field-tag { display: inline-block; padding: 1px 7px; border: 1px solid var(--ink); font-family: var(--mono); font-size: 11px; background: #fff; white-space: nowrap; }
.card-pen { font-size: 22px; }
.mini-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; margin-top: 16px; }
.mini-head h3 { margin: 0; font-size: 20px; }
.mini-head .pen { font-size: 24px; }
.sw-kind .field-tags { flex-direction: column; align-items: flex-start; }

/* 다이어그램(SVG)은 잘리지 않게 전체를 보여 줍니다 */
.card-img img[src$=".svg"] { object-fit: contain; padding: 12px; background: #fff; }
.prose img[src$=".svg"] { background: #fff; padding: 8px; }