/* ===== D2Coding Font Import ===== */
@font-face {
    font-family: 'D2Coding';
    src: url('https://cdn.jsdelivr.net/gh/projectnoonnu/noonfonts_three@1.0/D2Coding.woff') format('woff');
    font-weight: normal;
    font-style: normal;
}

@font-face {
    font-family: 'D2CodingBold';
    src: url('https://cdn.jsdelivr.net/gh/projectnoonnu/noonfonts_three@1.0/D2CodingBold.woff') format('woff');
    font-weight: bold;
    font-style: normal;
}

/* ===== CSS Variables ===== */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --accent-color: #0066cc;
    --accent-hover: #0052a3;
    --border-color: #dee2e6;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);
    --header-height: 70px;
    --max-width: 1350px;
    --sidebar-width: 320px;
    --transition: all 0.3s ease;
    --code-bg: #f5f5f5;
    --code-text: #d63384;
    --code-border: #e0e0e0;
}

[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;
    --text-primary: #e9ecef;
    --text-secondary: #adb5bd;
    --accent-color: #4da3ff;
    --accent-hover: #3d8ae6;
    --border-color: #495057;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.4);
    --code-bg: #2d2d2d;
    --code-text: #ff79c6;
    --code-border: #495057;
}

/* ===== Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
}

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

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

small {
    display: inline-block;
}

/* ===== Web Components Placeholder ===== */
blog-header {
    display: block;
    min-height: var(--header-height);
    width: 100%;
}

blog-footer {
    display: block;
    min-height: 100px;
    width: 100%;
}

recent-posts {
    display: block;
    min-height: 300px;
}

/* ===== Container ===== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* ===== Content Layout ===== */
.content-wrapper {
    display: grid;
    grid-template-columns: 1fr var(--sidebar-width);
    gap: 2rem;
    align-items: start;
}

/* ===== Main Content ===== */
.main-content {
    background-color: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    min-height: 400px;
}

.main-content:hover {
    box-shadow: var(--shadow-hover);
}

.main-content h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.post-meta {
    display: flex;
    gap: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.post-content {
    font-size: 1.1rem;
    line-height: 1.8;
}

.post-content p {
    margin-bottom: 1rem;
}

/* ===== Code Styles ===== */
code {
    font-family: 'D2Coding', 'D2CodingBold', 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.8em;
    background-color: var(--code-bg);
    color: var(--code-text);
    padding: 0.2em 0.5em;
    border-radius: 4px;
    border: 1px solid var(--code-border);
    font-weight: normal;
    letter-spacing: 0.01em;
    white-space: pre-wrap;
    word-break: break-word;
}

pre {
    position: relative;
    background-color: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: 8px;
    margin: 1.5rem 0;
    overflow: hidden;
}

pre code {
    display: block;
    padding: 0;
    margin: 0;
    overflow-x: auto;
    line-height: 1;
    font-size: 0.8em;
    font-family: 'D2Coding', 'D2CodingBold', 'Consolas', 'Monaco', 'Courier New', monospace;
    font-weight: normal;
    background-color: transparent;
    border: none;
    box-shadow: none;
    tab-size: 4;
}

.post-content code {
    vertical-align: baseline;
}

/* ===== Syntax Highlighting (Highlight.js) ===== */
/* D2Coding 폰트를 Highlight.js 코드 블록에 적용 */
.hljs {
    font-family: 'D2Coding', 'D2CodingBold', 'Consolas', 'Monaco', 'Courier New', monospace !important;
    line-height: 1.35 !important;
    font-size: 0.8em !important;
    padding: 1.2rem !important;
    border-radius: 8px !important;
    background: #282c34 !important;
}

/* 코드 블록 배경 및 스타일 조정 */
pre code.hljs {
    display: block;
    overflow-x: auto;
    padding: 1.2rem;
}

/* 인라인 코드는 기존 스타일 유지 */
:not(pre) > code {
    font-family: 'D2Coding', 'D2CodingBold', 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.8em;
    background-color: var(--code-bg);
    color: var(--code-text);
    padding: 0.2em 0.5em;
    border-radius: 4px;
    border: 1px solid var(--code-border);
}

/* ===== Sidebar ===== */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    position: sticky;
    top: calc(var(--header-height) + 2rem);
    min-height: 500px;
}

.sidebar-section {
    background-color: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    min-height: 120px;
}

.sidebar-section:hover {
    box-shadow: var(--shadow-hover);
}

.sidebar-section h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.sidebar-section p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

/* ===== Posts Preview ===== */
.posts-preview {
    margin-top: 2rem;
}

.post-preview-item {
    padding: 2rem 0;
    border-bottom: 1px solid var(--border-color);
}

.post-preview-item:first-child {
    padding-top: 0;
}

.post-preview-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.post-preview-item h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.post-preview-item h3 a {
    color: var(--text-primary);
    transition: var(--transition);
}

.post-preview-item h3 a:hover {
    color: var(--accent-color);
}

.post-preview-item .post-meta {
    margin-bottom: 1rem;
}

.post-preview-item p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.read-more {
    display: inline-flex;
    align-items: center;
    color: var(--accent-color);
    font-weight: 600;
    transition: var(--transition);
}

.read-more:hover {
    color: var(--accent-hover);
    transform: translateX(4px);
}

/* ===== Buttons ===== */
.btn-primary {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--accent-color);
    color: white;
    border-radius: 8px;
    font-weight: 500;
    text-align: center;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    color: white;
}

.btn-link {
    display: inline-block;
    color: var(--accent-color);
    font-weight: 500;
    transition: var(--transition);
}

.btn-link:hover {
    transform: translateX(4px);
}

/* ===== Responsive Design ===== */

/* Tablet */
@media (max-width: 968px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
        grid-row: 2;
    }

    .main-content h1 {
        font-size: 2rem;
    }
}

/* Mobile */
@media (max-width: 640px) {
    .container {
        padding: 1rem 0.75rem;
    }

    .main-content {
        padding: 1.5rem;
        border-radius: 8px;
    }

    .main-content h1 {
        font-size: 1.75rem;
    }

    .post-meta {
        flex-direction: column;
        gap: 0.5rem;
    }

    .post-content {
        font-size: 1rem;
    }

    .post-content h2 {
        font-size: 1.5rem;
        margin-top: 2rem;
        margin-bottom: 0.875rem;
    }

    .post-content h3 {
        font-size: 1.25rem;
        margin-top: 1.75rem;
        margin-bottom: 0.625rem;
    }

    .post-content h4 {
        font-size: 1.1rem;
        margin-top: 1.5rem;
        margin-bottom: 0.625rem;
    }

    .post-content h5 {
        font-size: 1rem;
        margin-top: 1.25rem;
        margin-bottom: 0.5rem;
    }

    .post-content h6 {
        font-size: 0.95rem;
        margin-top: 1rem;
        margin-bottom: 0.5rem;
    }

    .sidebar-section {
        padding: 1.25rem;
    }
}

/* ===== Utility Classes ===== */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.muted {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ===== Contact Page Styles ===== */
.contact-form-section {
    margin-top: 2rem;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.contact-item {
    padding: 1.5rem;
    background-color: var(--bg-primary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.contact-item:hover {
    border-color: var(--accent-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.contact-item h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.contact-item p {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.contact-desc {
    font-size: 0.9rem;
    color: var(--text-secondary) !important;
}

.contact-note {
    padding: 1.5rem 3rem 1.5rem 3rem;
    background-color: var(--bg-primary);
    border-left: 4px solid var(--accent-color);
    border-radius: 4px;
}

.contact-note h3 {
    margin-bottom: 0.5rem;
}

.social-links-contact {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.social-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-weight: 500;
    transition: var(--transition);
}

.social-link:hover {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

/* ===== About Page Styles ===== */
.post-content h2 {
    font-size: 1.75rem;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    line-height: 1.3;
}

.post-content h2:first-child {
    margin-top: 1.5rem;
}

.post-content h3 {
    font-size: 1.35rem;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    line-height: 1.4;
}

.post-content h4 {
    font-size: 1.2rem;
    margin-top: 1.75rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    line-height: 1.4;
}

.post-content h5 {
    font-size: 1.1rem;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    line-height: 1.5;
}

.post-content h6 {
    font-size: 1rem;
    margin-top: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    line-height: 1.5;
}

.post-content ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.post-content ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.post-content strong {
    color: var(--accent-color);
    font-weight: 600;
}

@media (max-width: 640px) {
    .contact-info {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .social-links-contact {
        flex-direction: column;
    }

    .social-link {
        width: 100%;
        justify-content: center;
    }
}