/* =============================================
   리셋 & 기본 변수
   ============================================= */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-bg: #fafaf9;
    --color-text: #1c1917;
    --color-muted: #78716c;
    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-border: #e7e5e4;
    --color-surface: #ffffff;
    --color-danger: #dc2626;
    --color-success: #16a34a;
    --color-warning: #d97706;
    --font-sans: 'Apple SD Gothic Neo', 'Noto Sans KR', 'Malgun Gothic', sans-serif;
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;
    --max-width: 720px;
    --radius: 6px;
}

body {
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.75;
}

a {
    color: var(--color-accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* =============================================
   공통 레이아웃
   ============================================= */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2.5rem 1.25rem;
}

/* =============================================
   퍼블릭 헤더
   ============================================= */
.site-header {
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.site-title {
    font-size: 1.125rem;
    font-weight: 800;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.site-title:hover {
    text-decoration: none;
    color: var(--color-accent);
}

.site-nav {
    display: flex;
    gap: 1.5rem;
}

.site-nav a {
    font-size: 0.9rem;
    color: var(--color-muted);
    font-weight: 500;
}

.site-nav a:hover {
    color: var(--color-text);
    text-decoration: none;
}

/* =============================================
   퍼블릭 푸터
   ============================================= */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: 2rem 1.25rem;
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-muted);
}

.site-footer a {
    color: var(--color-muted);
    margin-left: 1rem;
}

/* =============================================
   글 목록 (홈 / 카테고리)
   ============================================= */
.page-title {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 2rem;
}

.post-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.post-card {
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 2rem;
}

.post-card-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
    color: var(--color-muted);
}

.post-card-title {
    font-size: 1.375rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 0.5rem;
}

.post-card-title a {
    color: var(--color-text);
}

.post-card-title a:hover {
    color: var(--color-accent);
    text-decoration: none;
}

.post-card-summary {
    font-size: 0.95rem;
    color: var(--color-muted);
    line-height: 1.6;
}

/* =============================================
   카테고리 배지
   ============================================= */
.category-badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    background: #f0f9ff;
    color: var(--color-accent);
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* =============================================
   글 상세
   ============================================= */
.post-article {
    margin-bottom: 3rem;
}

.post-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.post-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: var(--color-muted);
}

.view-count {
    margin-left: auto;
}

.post-title {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.35;
    letter-spacing: -0.02em;
}

/* 마크다운 렌더링 영역 */
.post-content {
    font-size: 1.05rem;
    line-height: 1.85;
    color: #292524;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4 {
    margin: 2rem 0 1rem;
    font-weight: 700;
    line-height: 1.4;
    letter-spacing: -0.01em;
}

.post-content h1 { font-size: 1.75rem; }
.post-content h2 { font-size: 1.4rem; }
.post-content h3 { font-size: 1.2rem; }

.post-content p {
    margin-bottom: 1.25rem;
}

.post-content ul,
.post-content ol {
    padding-left: 1.5rem;
    margin-bottom: 1.25rem;
}

.post-content li {
    margin-bottom: 0.4rem;
}

.post-content blockquote {
    border-left: 4px solid var(--color-accent);
    padding-left: 1rem;
    margin: 1.5rem 0;
    color: var(--color-muted);
    font-style: italic;
}

.post-content pre {
    background: #1e1e2e;
    color: #cdd6f4;
    padding: 1.25rem;
    border-radius: var(--radius);
    overflow-x: auto;
    margin-bottom: 1.25rem;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
}

.post-content code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: #f3f4f6;
    padding: 0.15em 0.4em;
    border-radius: 3px;
}

.post-content pre code {
    background: none;
    padding: 0;
}

.post-content img {
    max-width: 100%;
    border-radius: var(--radius);
}

.post-content a {
    color: var(--color-accent);
    text-decoration: underline;
}

.post-nav {
    margin-top: 2rem;
}

.btn-back {
    color: var(--color-muted);
    font-size: 0.9rem;
}

/* =============================================
   페이지네이션
   ============================================= */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 3rem;
}

.page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2.25rem;
    height: 2.25rem;
    padding: 0 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-text);
    font-size: 0.9rem;
    background: var(--color-surface);
}

.page-btn:hover {
    background: var(--color-bg);
    text-decoration: none;
}

.page-btn.active {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

/* =============================================
   공통 버튼
   ============================================= */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    line-height: 1;
}

.btn:hover {
    background: var(--color-bg);
    text-decoration: none;
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background: var(--color-accent-hover);
}

.btn-danger {
    background: var(--color-danger);
    color: #fff;
    border-color: var(--color-danger);
}

.btn-danger:hover {
    background: #b91c1c;
}

.btn-sm {
    padding: 0.3rem 0.7rem;
    font-size: 0.8rem;
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.btn-link {
    background: none;
    border: none;
    color: var(--color-muted);
    cursor: pointer;
    font-size: 0.9rem;
    padding: 0;
}

.btn-link:hover {
    color: var(--color-text);
}

/* =============================================
   빈 메시지
   ============================================= */
.empty-msg {
    color: var(--color-muted);
    text-align: center;
    padding: 3rem 0;
}

/* =============================================
   로그인 페이지
   ============================================= */
.login-page {
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.login-wrap {
    width: 100%;
    max-width: 400px;
    padding: 2rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.login-title {
    font-size: 1.5rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 1.5rem;
}

.login-error {
    background: #fef2f2;
    color: var(--color-danger);
    padding: 0.75rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    margin-bottom: 1rem;
    text-align: center;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* =============================================
   관리자 레이아웃
   ============================================= */
.admin-body {
    background: #f8fafc;
    min-height: 100vh;
}

.admin-header {
    background: #1e293b;
    color: #fff;
    padding: 0 1.5rem;
}

.admin-header-inner {
    max-width: 1200px;
    margin: 0 auto;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.admin-logo {
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
}

.admin-logo:hover {
    text-decoration: none;
    color: #94a3b8;
}

.admin-nav {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.admin-nav a {
    color: #94a3b8;
    font-size: 0.875rem;
}

.admin-nav a:hover {
    color: #fff;
    text-decoration: none;
}

.admin-main {
    padding: 2rem 1.25rem;
}

.admin-container {
    max-width: 1200px;
    margin: 0 auto;
}

.admin-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    gap: 1rem;
}

.admin-toolbar h1 {
    font-size: 1.5rem;
    font-weight: 700;
}

.admin-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* =============================================
   관리자 테이블
   ============================================= */
.admin-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--color-border);
    font-size: 0.9rem;
}

.admin-table th {
    background: #f1f5f9;
    padding: 0.75rem 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--color-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    border-bottom: 1px solid var(--color-border);
}

.admin-table td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--color-border);
    vertical-align: middle;
}

.admin-table tr:last-child td {
    border-bottom: none;
}

.admin-table tr:hover td {
    background: #f8fafc;
}

.admin-table a {
    color: var(--color-text);
    font-weight: 500;
}

.admin-table a:hover {
    color: var(--color-accent);
}

/* =============================================
   상태 배지
   ============================================= */
.badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-published {
    background: #dcfce7;
    color: var(--color-success);
}

.badge-draft {
    background: #fef9c3;
    color: var(--color-warning);
}

/* =============================================
   관리자 폼
   ============================================= */
.post-form {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
}

.form-group label small {
    font-weight: 400;
    color: var(--color-muted);
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="password"],
.form-group select {
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--color-surface);
    width: 100%;
    transition: border-color 0.15s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.12);
}

.content-textarea {
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-family: var(--font-mono);
    line-height: 1.6;
    resize: vertical;
    width: 100%;
    background: var(--color-surface);
}

.radio-group {
    display: flex;
    gap: 1.5rem;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    cursor: pointer;
    font-size: 0.9rem;
}

.field-error {
    color: var(--color-danger);
    font-size: 0.8rem;
}

.form-actions {
    display: flex;
    gap: 0.75rem;
    padding-top: 0.5rem;
}

/* =============================================
   관리자 글 상세
   ============================================= */
.admin-post-detail {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.admin-post-meta {
    display: flex;
    gap: 1.5rem;
    font-size: 0.85rem;
    color: var(--color-muted);
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

/* =============================================
   관리자 푸터
   ============================================= */
.admin-footer {
    padding: 1rem 1.5rem;
    text-align: center;
    font-size: 0.8rem;
    color: var(--color-muted);
    border-top: 1px solid var(--color-border);
    margin-top: 3rem;
}

/* =============================================
   반응형 (모바일)
   ============================================= */
@media (max-width: 640px) {
    .site-header .container {
        flex-direction: column;
        gap: 0.75rem;
        padding-top: 0.75rem;
        padding-bottom: 0.75rem;
    }

    .site-nav {
        gap: 1rem;
    }

    .post-title {
        font-size: 1.5rem;
    }

    .admin-header-inner {
        height: auto;
        padding: 0.75rem 0;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .admin-table {
        font-size: 0.8rem;
    }

    .admin-toolbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .radio-group {
        flex-direction: column;
        gap: 0.75rem;
    }
}