/* ============================================================
   contribute.css — 문제 기여 가이드 페이지
   ============================================================ */

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: NanumGothic, 'Nanum Gothic', 'Malgun Gothic', sans-serif;
    background: #f9f8f7;
    color: #2c313d;
    min-height: 100vh;
    letter-spacing: -0.3px;
    line-height: 1.6;
}

/* ---------- Header ---------- */
header {
    background: #2c313d;
    color: #fff;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    letter-spacing: -0.3px;
}
.back-link {
    color: #8ba4b3;
    font-size: 13px;
    text-decoration: none;
    transition: color 0.15s;
}
.back-link:hover { color: #fff; }
.header-title {
    font-size: 16px;
    font-weight: bold;
}
.beta-badge {
    display: inline-block;
    margin-left: 8px;
    padding: 2px 8px;
    background: #fa5536;
    color: #fff;
    font-size: 10px;
    font-weight: bold;
    border-radius: 3px;
    letter-spacing: 1px;
    vertical-align: middle;
}

/* ---------- Container ---------- */
.container {
    max-width: 760px;
    margin: 32px auto;
    padding: 0 16px;
}

h1 {
    font-size: 26px;
    font-weight: bold;
    letter-spacing: -0.5px;
    margin-bottom: 8px;
}
.lead {
    font-size: 15px;
    color: #555;
    margin-bottom: 28px;
}

/* ---------- TOC box ---------- */
.toc-box {
    background: #ecf8ff;
    border: 1px solid #d6e9f4;
    border-radius: 6px;
    padding: 16px 20px;
    margin-bottom: 36px;
    font-size: 14px;
}
.toc-box strong {
    display: block;
    margin-bottom: 8px;
    color: #4f80ff;
}
.toc-box ol {
    margin: 0;
    padding-left: 20px;
    line-height: 1.8;
}

/* ---------- Sections ---------- */
h2 {
    font-size: 18px;
    font-weight: bold;
    color: #2c313d;
    letter-spacing: -0.4px;
    margin-top: 36px;
    margin-bottom: 12px;
    padding-top: 20px;
    border-top: 1px solid #e2e2e2;
}
h2:first-of-type {
    margin-top: 28px;
    padding-top: 0;
    border-top: none;
}
h3 {
    font-size: 15px;
    font-weight: bold;
    color: #2c313d;
    letter-spacing: -0.3px;
    margin-top: 20px;
    margin-bottom: 8px;
}

.required, .optional, .recommended {
    display: inline-block;
    margin-left: 8px;
    padding: 2px 8px;
    font-size: 11px;
    font-weight: bold;
    border-radius: 3px;
    letter-spacing: 0;
    vertical-align: middle;
}
.required    { background: #fa5536; color: #fff; }
.recommended { background: #4f80ff; color: #fff; }
.optional    { background: #e2e2e2; color: #555; }

p, ul, ol {
    font-size: 14px;
    margin-bottom: 12px;
    color: #2c313d;
}
ul, ol {
    padding-left: 24px;
}
li { margin-bottom: 4px; }

/* ---------- Tables ---------- */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0 20px;
    font-size: 13px;
    background: #fff;
}
th, td {
    border: 1px solid #d6e9f4;
    padding: 8px 12px;
    text-align: left;
    vertical-align: top;
}
th {
    background: #ecf8ff;
    font-weight: bold;
    color: #2c313d;
}

/* ---------- Code ---------- */
code {
    background: #f1f3f5;
    padding: 1px 6px;
    border-radius: 3px;
    font-size: 12.5px;
    font-family: 'Consolas', 'Monaco', monospace;
    color: #e03131;
}
pre {
    background: #2c313d;
    color: #f0f2f5;
    padding: 16px 20px;
    border-radius: 6px;
    overflow-x: auto;
    margin: 12px 0 20px;
    font-size: 13px;
    line-height: 1.55;
}
pre code {
    background: none;
    color: inherit;
    padding: 0;
    font-size: 13px;
}

kbd {
    background: #fff;
    border: 1px solid #d6e9f4;
    border-bottom-width: 2px;
    border-radius: 3px;
    padding: 1px 6px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 12px;
    color: #2c313d;
}

/* ---------- Step list (GitHub 기여 절차) ---------- */
ol.steps {
    counter-reset: steps;
    list-style: none;
    padding-left: 0;
    margin-top: 8px;
}
ol.steps > li {
    counter-increment: steps;
    position: relative;
    padding-left: 40px;
    margin-bottom: 24px;
}
ol.steps > li::before {
    content: counter(steps);
    position: absolute;
    left: 0;
    top: 2px;
    width: 28px;
    height: 28px;
    background: #4f80ff;
    color: #fff;
    border-radius: 50%;
    text-align: center;
    line-height: 28px;
    font-weight: bold;
    font-size: 13px;
}
ol.steps > li strong {
    display: block;
    margin-bottom: 6px;
    font-size: 15px;
    color: #2c313d;
    letter-spacing: -0.3px;
}
ol.steps > li p {
    margin-bottom: 6px;
}
ol.steps > li pre {
    margin-top: 6px;
}
ol.steps > li ul {
    margin-top: 6px;
    padding-left: 20px;
}

/* ---------- Links ---------- */
a {
    color: #4f80ff;
    text-decoration: none;
}
a:hover { text-decoration: underline; }

/* ---------- Effective date (legal pages) ---------- */
.effective-date {
    margin-top: 36px;
    padding-top: 20px;
    border-top: 1px solid #e2e2e2;
    font-size: 13px;
    color: #555;
}

/* ---------- Disclaimer footer ---------- */
.disclaimer {
    max-width: 960px;
    margin: 32px auto;
    padding: 0 16px;
    text-align: center;
    font-size: 11px;
    line-height: 1.6;
    color: #8ba4b3;
    letter-spacing: -0.2px;
}
.disclaimer a {
    color: #8ba4b3;
    text-decoration: underline;
    text-underline-offset: 2px;
}
.disclaimer a:hover {
    color: #4f80ff;
}
.disclaimer .tm-notice {
    margin-top: 6px;
    font-size: 10px;
    opacity: 0.7;
}
.disclaimer .tm-notice sup {
    font-size: 8px;
}