/* ============================================================
   비온 특허법률사무소 — IP 칼럼 공통 스타일
   column.css

   칼럼 HTML 7편이 공유합니다. 여기를 고치면 전편에 반영됩니다.
   새 칼럼을 만들 때는 <head>에 아래 한 줄만 넣으면 됩니다.

     <link rel="stylesheet" href="/column.css">

   폰트(Pretendard, Noto Serif KR, Montserrat)는 각 HTML의
   <head>에서 계속 불러옵니다. 이 파일에는 포함돼 있지 않습니다.
   ============================================================ */

:root {
    --navy: #16233D;
    --navy-deep: #111A2E;
    --navy-tint: #F1ECE1;
    --ivory: #F8F4EC;
    --ivory-lift: #FDFBF6;
    --ivory-soft: #F1ECE1;
    --line: #E4DDD0;
    --text: #111A2E;
    --muted: #5B6472;
    --caption: #918E85;
    --accent: #7C93A6;
    --serif-kr: 'Noto Serif KR', serif;
    --sans: 'Pretendard', 'Pretendard Variable', system-ui, -apple-system, 'Apple SD Gothic Neo', sans-serif;
    --mont: 'Montserrat', 'Pretendard', system-ui, sans-serif;
  }
* { box-sizing: border-box; }
body {
    margin: 0;
    background: var(--ivory);
    font-family: var(--sans);
    color: var(--text);
    line-height: 1.85;
    -webkit-font-smoothing: antialiased;
    word-break: keep-all;
    overflow-wrap: normal;
  }
.wrap {
    max-width: 760px;
    margin: 0 auto;
    background: var(--ivory-lift);
    padding: 0 0 80px;
  }
/* Header */
  header.masthead {
    border-top: 4px solid var(--navy);
    padding: 46px 56px 34px;
    border-bottom: 1px solid var(--line);
  }
/* Logo & Eyebrow */
  .eyebrow {
    display: flex;
    align-items: center;
    font-size: 12px;
    letter-spacing: 0.18em;
    color: var(--caption);
    font-family: var(--mont);
    font-weight: 600;
    margin-bottom: 18px;
  }
.logo-text {
    font-family: var(--sans);
    font-size: 16px;
    font-weight: 800;
    letter-spacing: 0;
    margin-right: 8px;
  }
.logo-text .be { color: #1B365D; }
.logo-text .on { color: #677A8B; }
.eyebrow-text { padding-top: 2px; }
h1 {
    font-family: var(--serif-kr);
    font-size: 32px;
    line-height: 1.42;
    font-weight: 400;
    color: var(--navy-deep);
    margin: 0 0 18px;
    letter-spacing: -0.02em;
  }
.deck {
    font-size: 16px;
    color: var(--muted);
    font-weight: 400;
    margin: 0;
  }
.byline {
    margin-top: 26px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
    font-size: 13px;
    color: var(--muted);
  }
.byline strong { color: var(--navy); font-weight: 500; }
main { padding: 44px 56px 0; }
h2 {
    font-family: var(--serif-kr);
    font-size: 21px;
    color: var(--navy-deep);
    font-weight: 500;
    margin: 54px 0 20px;
    padding-left: 14px;
    border-left: 4px solid var(--navy);
    line-height: 1.5;
    letter-spacing: -0.01em;
  }
h3 {
    font-family: var(--serif-kr);
    font-size: 16px;
    color: var(--navy);
    font-weight: 700;
    margin: 32px 0 10px;
  }
p { margin: 0 0 18px; font-size: 15.5px; font-weight: 400; }
strong { font-weight: 600; color: var(--navy-deep); }
/* Opening quotes */
  .voices {
    background: var(--navy-tint);
    border-radius: 4px;
    padding: 26px 30px;
    margin: 0 0 30px;
  }
.voices p {
    margin: 0 0 12px;
    font-size: 15.5px;
    color: var(--navy-deep);
    font-weight: 400;
    padding-left: 18px;
    position: relative;
  }
.voices p:last-child { margin-bottom: 0; }
.voices p::before {
    content: '';
    position: absolute;
    left: 0; top: 12px;
    width: 5px; height: 5px;
    border-radius: 50%;
    background: var(--accent);
  }
/* Pull callout */
  .pull {
    margin: 34px 0;
    padding: 22px 26px;
    border-left: 3px solid var(--accent);
    background: var(--ivory-soft);
    font-size: 16.5px;
    font-weight: 500;
    color: var(--navy-deep);
    line-height: 1.7;
  }
/* Warning box */
  .warn {
    margin: 30px 0;
    border: 1px solid var(--line);
    border-radius: 4px;
    overflow: hidden;
  }
.warn-h {
    background: var(--navy);
    color: var(--ivory);
    padding: 12px 22px;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.02em;
  }
.warn-b { padding: 20px 24px; }
.warn-b p:last-child { margin-bottom: 0; }
/* Table */
  .tbl-cap {
    font-size: 13px;
    color: var(--muted);
    margin: 30px 0 10px;
    font-weight: 500;
  }
table {
    width: 100%;
    border-collapse: collapse;
    margin: 0 0 12px;
    font-size: 14px;
  }
thead th {
    background: var(--navy);
    color: var(--ivory);
    font-weight: 500;
    padding: 12px 14px;
    text-align: left;
    font-size: 13.5px;
  }
tbody td {
    padding: 13px 14px;
    border-bottom: 1px solid var(--line);
    vertical-align: top;
    font-weight: 400;
  }
tbody tr:nth-child(even) { background: var(--ivory); }
tbody td:first-child {
    font-weight: 500;
    color: var(--navy-deep);
    white-space: nowrap;
  }
/* Checklist */
  .steps {
    counter-reset: s;
    list-style: none;
    padding: 0;
    margin: 26px 0;
  }
.steps li {
    counter-increment: s;
    position: relative;
    padding: 0 0 20px 46px;
    font-size: 15.5px;
    font-weight: 400;
  }
.steps li::before {
    content: counter(s);
    position: absolute;
    left: 0; top: 2px;
    width: 28px; height: 28px;
    border-radius: 50%;
    background: var(--navy);
    color: var(--ivory);
    font-size: 13px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
  }
.steps li b {
    display: block;
    color: var(--navy-deep);
    font-weight: 500;
    margin-bottom: 2px;
  }
/* Series navigation */
  .series {
    margin: 46px 0 0;
    padding: 20px 24px;
    border: 1px solid var(--line);
    border-radius: 4px;
    background: var(--ivory);
  }
.series .series-h {
    font-family: var(--mont);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.14em;
    color: var(--caption);
    margin-bottom: 12px;
  }
.series ol {
    margin: 0;
    padding-left: 0;
    list-style: none;
    counter-reset: c;
  }
.series li {
    counter-increment: c;
    font-size: 14px;
    color: var(--muted);
    line-height: 1.7;
    padding: 4px 0 4px 26px;
    position: relative;
  }
.series li::before {
    content: counter(c) '.';
    position: absolute;
    left: 0;
    font-family: var(--mont);
    font-weight: 700;
    font-size: 12.5px;
    color: var(--accent);
  }
.series li b { color: var(--navy-deep); font-weight: 600; }
.series li.here { color: var(--navy-deep); }
.series li.here::before { color: var(--navy); }
.series .here-tag {
    display: inline-block;
    font-size: 10.5px;
    font-family: var(--mont);
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--ivory);
    background: var(--navy);
    padding: 1px 7px;
    border-radius: 2px;
    margin-left: 6px;
    vertical-align: 2px;
  }
.close h3 {
    color: var(--ivory);
    margin: 0 0 12px;
    font-size: 17px;
  }
.close p {
    color: var(--ivory-soft);
    font-size: 14.5px;
    margin-bottom: 0;
    font-weight: 400;
  }
.close p strong { color: var(--ivory); }
.close .firm {
    margin-top: 20px;
    padding-top: 18px;
    border-top: 1px solid rgba(248,244,236,0.18);
    font-size: 13px;
    color: var(--accent);
  }
.close .firm b { color: var(--ivory); font-weight: 500; }
.close .cta {
    display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px;
  }
.close .cta a {
    display: inline-block; padding: 11px 20px; border-radius: 3px;
    font-size: 14px; text-decoration: none;
    transition: background .2s, color .2s, border-color .2s;
  }
.close .cta .btn-primary {
    background: var(--ivory); color: var(--navy); font-weight: 600;
  }
.close .cta .btn-primary:hover { background: #fff; }
.close .cta .btn-ghost {
    border: 1px solid rgba(248,244,236,0.35); color: var(--ivory);
  }
.close .cta .btn-ghost:hover {
    border-color: var(--ivory); background: rgba(248,244,236,0.08);
  }
.more {
    margin-top: 40px; padding-top: 22px;
    border-top: 1px solid var(--line); font-size: 14px;
  }
.more span {
    display: block; color: var(--caption); font-size: 12.5px;
    letter-spacing: .04em; margin-bottom: 8px;
  }
.more a {
    color: var(--navy); text-decoration: none;
    border-bottom: 1px solid var(--line); font-weight: 500;
    display: block; margin-bottom: 6px;
  }
.more a:hover { border-color: var(--navy); }
.disclaimer {
    margin-top: 26px;
    font-size: 12px;
    color: var(--muted);
    font-weight: 400;
    line-height: 1.7;
  }
/* Case study */
  .case {
    margin: 28px 0;
    padding: 24px 26px;
    background: var(--ivory);
    border: 1px solid var(--line);
    border-radius: 4px;
  }
.case-tag {
    display: inline-block;
    font-size: 11px;
    font-family: var(--mont);
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--ivory);
    background: var(--navy);
    padding: 4px 10px;
    border-radius: 2px;
    margin-bottom: 14px;
  }
.case p { margin-bottom: 12px; }
.case p:last-child { margin-bottom: 0; }
.case-take {
    margin-top: 16px;
    padding-top: 14px;
    border-top: 1px dashed var(--line);
    font-size: 14.5px;
    color: var(--navy-deep);
    font-weight: 500;
  }
.sources {
    margin: 0 0 34px;
    padding-left: 20px;
  }
.sources li {
    margin-bottom: 8px;
    font-size: 13px;
    line-height: 1.65;
    color: var(--muted);
  }
.sources a {
    color: var(--navy);
    text-decoration-color: var(--accent);
    text-underline-offset: 3px;
  }

/* Closing block */
.close {
    margin-top: 50px;
    padding: 30px 32px;
    background: var(--navy);
    border-radius: 4px;
    color: var(--ivory);
  }
/* 시리즈 내비게이션 바로 뒤에 오는 경우 간격을 좁힌다 */
.series + .close { margin-top: 24px; }

.tbl-note {
    font-size: 12.5px;
    color: var(--muted);
    font-weight: 400;
    margin-bottom: 0;
    line-height: 1.7;
  }

/* 모바일 */
@media (max-width: 640px) {
    header.masthead { padding: 34px 22px 26px; }
    main { padding: 32px 22px 0; }
    h1 { font-size: 24px; }
    h2 { font-size: 18.5px; }
    table { font-size: 13px; }
    tbody td:first-child { white-space: normal; }
  }
