/* 
   a.n. Blog Platform - Custom Stylesheet
   Minimalist, Typography-driven, Distraction-free Reading Experience
*/

/* Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&family=Noto+Sans+KR:wght@400;500;700&family=Noto+Serif+JP:ital,wght@0,400;0,700;1,400&family=Noto+Serif+KR:ital,wght@0,400;0,700;1,400&display=swap');

:root {
  /* Light Theme Variables */
  --bg-color: #f7f6f3;
  --bg-container: #ffffff;
  --text-color: #2e2e2c;
  --text-muted: #6e6d6a;
  --accent-color: #cc1919;
  --accent-hover: #9e1313;
  --accent-bg: rgba(204, 25, 25, 0.08);
  --border-color: #e3e1db;
  --input-bg: #ffffff;
  --shadow-color: rgba(0, 0, 0, 0.04);
  --transition-speed: 0.25s;
  
  --font-headings: 'Noto Serif KR', 'Noto Serif JP', Georgia, serif;
  --font-body: 'Noto Sans KR', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --content-width: 700px;
}

body.dark-mode {
  /* Dark Theme Variables */
  --bg-color: #121212;
  --bg-container: #1a1a1a;
  --text-color: #e3e3e3;
  --text-muted: #a0a0a0;
  --accent-color: #ff4d4d;
  --accent-hover: #ff3333;
  --accent-bg: rgba(255, 77, 77, 0.12);
  --border-color: #2c2c2c;
  --input-bg: #222222;
  --shadow-color: rgba(0, 0, 0, 0.3);
}

/* Reset and Global Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-body);
  line-height: 1.8;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headings);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-color);
  margin-top: 1.8em;
  margin-bottom: 0.6em;
}

h1 { font-size: 2.1rem; margin-top: 1em; }
h2 { font-size: 1.7rem; }
h3 { font-size: 1.4rem; }
h4 { font-size: 1.15rem; }

p {
  margin-bottom: 1.5em;
  word-break: keep-all;
  overflow-wrap: break-word;
}

/* Scroll Progress Bar */
.scroll-progress-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: transparent;
  z-index: 1000;
}

.scroll-progress-bar {
  height: 100%;
  width: 0%;
  background-color: var(--accent-color);
  transition: width 0.05s ease-out;
}

/* Layout */
.site-wrapper {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem 1.5rem;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 2rem;
  margin-bottom: 3rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.site-branding {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.site-logo {
  width: 55px;
  height: 55px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent-color);
  background-color: var(--accent-bg);
}

.site-title {
  font-family: var(--font-headings);
  font-size: 1.6rem;
  margin: 0;
}

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

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

.site-description {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.1rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  margin-top: 0.5rem;
}

.nav-link {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-color);
  text-decoration: none;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s;
  font-size: 1.2rem;
}

.theme-toggle-btn:hover {
  color: var(--accent-color);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* Post list */
.post-list {
  list-style: none;
}

.post-item {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  transition: transform 0.2s ease;
}

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

.post-item-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
  display: flex;
  gap: 0.8rem;
  align-items: center;
}

.post-item-title {
  font-size: 1.5rem;
  margin: 0 0 0.6rem 0;
}

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

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

.post-item-description {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Post view */
.post-header {
  margin-bottom: 2.5rem;
}

.post-title {
  font-size: 2.2rem;
  margin-top: 0;
  margin-bottom: 0.8rem;
}

.post-meta {
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.post-tags {
  display: flex;
  gap: 0.4rem;
}

.post-tag {
  background-color: var(--border-color);
  color: var(--text-color);
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  transition: opacity 0.2s;
}

.post-tag:hover {
  opacity: 0.8;
  text-decoration: none;
}

.draft-badge {
  background-color: #d9534f;
  color: white;
  font-size: 0.75rem;
  font-weight: bold;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

/* Table of Contents */
.toc-container {
  background-color: var(--bg-container);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1.2rem;
  margin: 2rem 0;
  box-shadow: 0 4px 12px var(--shadow-color);
}

.toc-title {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  margin-top: 0;
  margin-bottom: 0.6rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.4rem;
}

.toc-container ul {
  list-style: none;
  padding-left: 0;
}

.toc-container ul ul {
  padding-left: 1.2rem;
  margin-top: 0.3rem;
}

.toc-container li {
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}

.toc-container a {
  color: var(--text-muted);
}

.toc-container a:hover {
  color: var(--accent-color);
  text-decoration: none;
}

.post-content {
  font-size: 1.05rem;
  line-height: 1.85;
  text-align: justify;
  text-justify: inter-word;
}

.post-content p {
  margin-bottom: 1.6em;
}

.post-content strong {
  font-weight: 700;
}

.post-content ul, .post-content ol {
  margin-bottom: 1.6em;
  padding-left: 1.8rem;
}

.post-content li {
  margin-bottom: 0.5em;
}

.post-content blockquote {
  border-left: 4px solid var(--accent-color);
  padding: 0.8rem 1.2rem;
  background-color: var(--bg-container);
  margin: 2rem 0;
  font-family: var(--font-headings);
  font-style: italic;
  box-shadow: 0 2px 8px var(--shadow-color);
}

.post-content blockquote p:last-child {
  margin-bottom: 0;
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  margin: 2rem 0;
  box-shadow: 0 4px 16px var(--shadow-color);
  display: block;
}

.post-content pre {
  background-color: var(--bg-container);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1.2rem;
  overflow-x: auto;
  margin: 2rem 0;
}

.post-content code {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.9em;
  background-color: var(--bg-container);
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  border: 1px solid var(--border-color);
}

.post-content pre code {
  background-color: transparent;
  padding: 0;
  border-radius: 0;
  border: none;
  font-size: 0.85em;
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.95rem;
}

.post-content th, .post-content td {
  border: 1px solid var(--border-color);
  padding: 0.6rem 0.8rem;
  text-align: left;
}

.post-content th {
  background-color: var(--bg-container);
  font-weight: 700;
}

/* Post footer / sharing */
.post-footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.share-buttons {
  display: flex;
  gap: 0.6rem;
}

.btn-share {
  background-color: var(--bg-container);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s;
}

.btn-share:hover {
  background-color: var(--accent-bg);
  border-color: var(--accent-color);
  color: var(--accent-color);
}

/* Common UI Elements / Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--accent-color);
  color: #ffffff !important;
  border: none;
  padding: 0.6rem 1.2rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
}

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

.btn:active {
  transform: scale(0.98);
}

.btn-secondary {
  background-color: var(--bg-container);
  border: 1px solid var(--border-color);
  color: var(--text-color) !important;
}

.btn-secondary:hover {
  background-color: var(--border-color);
}

.btn-danger {
  background-color: #d9534f;
}

.btn-danger:hover {
  background-color: #c9302c;
}

.btn-sm {
  padding: 0.35rem 0.7rem;
  font-size: 0.8rem;
  border-radius: 4px;
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text-color);
}

.form-control {
  width: 100%;
  padding: 0.65rem 0.8rem;
  font-size: 0.95rem;
  font-family: var(--font-body);
  background-color: var(--input-bg);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px var(--accent-bg);
}

.form-check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.form-check input {
  cursor: pointer;
}

/* Login Page Styling */
.login-container {
  max-width: 400px;
  margin: 5rem auto;
  padding: 2.2rem;
  background-color: var(--bg-container);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 10px 30px var(--shadow-color);
}

.login-title {
  font-size: 1.6rem;
  margin-top: 0;
  margin-bottom: 1.5rem;
  text-align: center;
}

.login-error {
  color: #d9534f;
  background-color: rgba(217, 83, 79, 0.1);
  padding: 0.6rem 0.8rem;
  border-radius: 4px;
  font-size: 0.85rem;
  margin-bottom: 1.2rem;
  border-left: 3px solid #d9534f;
}

/* Admin Dashboard */
.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.admin-title {
  margin: 0;
  font-size: 1.8rem;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

.admin-table th, .admin-table td {
  padding: 0.8rem;
  border-bottom: 1px solid var(--border-color);
  text-align: left;
}

.admin-table th {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.admin-table td {
  font-size: 0.95rem;
}

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

/* Editor Form */
.editor-container {
  background-color: var(--bg-container);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 2rem;
  box-shadow: 0 4px 16px var(--shadow-color);
}

.editor-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 600px) {
  .editor-form-grid {
    grid-template-columns: 1fr;
  }
}

.editor-textarea {
  min-height: 400px;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.95rem;
  line-height: 1.6;
}

.editor-buttons {
  margin-top: 2rem;
  display: flex;
  justify-content: flex-end;
  gap: 0.8rem;
}

/* Live Preview Modal/Tab */
.editor-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1rem;
}

.editor-tab {
  padding: 0.5rem 1rem;
  cursor: pointer;
  border: 1px solid transparent;
  border-bottom: none;
  margin-bottom: -1px;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.editor-tab.active {
  color: var(--accent-color);
  border-color: var(--border-color);
  background-color: var(--bg-container);
  border-top-left-radius: 4px;
  border-top-right-radius: 4px;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.preview-area {
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1.5rem;
  background-color: var(--bg-container);
  min-height: 400px;
  max-height: 600px;
  overflow-y: auto;
}

/* Back to top button */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 45px;
  height: 45px;
  background-color: var(--bg-container);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-color);
  cursor: pointer;
  box-shadow: 0 4px 10px var(--shadow-color);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 99;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
  transform: translateY(-3px);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  margin-top: 5rem;
  padding-top: 2rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
}

.footer-credits {
  margin-bottom: 0.5rem;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn 0.4s ease forwards;
}

/* Print styles */
@media print {
  body {
    background: white;
    color: black;
    font-size: 12pt;
  }
  .site-wrapper {
    padding: 0;
    max-width: 100%;
  }
  .site-header, .site-footer, .scroll-progress-container, .theme-toggle-btn, .toc-container, .post-footer, .back-to-top {
    display: none !important;
  }
  .post-content {
    font-size: 11pt;
    line-height: 1.6;
  }
  .post-content pre {
    border: 1px solid #ccc;
    background: transparent;
  }
}

/* Blog Layout (Grid with tag sidebar) */
.blog-layout {
  display: grid;
  grid-template-columns: 2.7fr 1fr;
  gap: 3rem;
  align-items: start;
}

.blog-main {
  min-width: 0; /* Prevents layout breakage with large tables/code blocks */
}

.blog-sidebar {
  position: sticky;
  top: 2rem;
}

/* Tag list item styling in Sidebar (Memos inspired) */
.memos-tag-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  text-decoration: none !important;
  color: var(--text-color) !important;
  font-size: 0.9rem;
  transition: background-color 0.2s, color 0.2s;
  background-color: transparent;
}

.memos-tag-item:hover {
  background-color: var(--accent-bg);
  color: var(--accent-color) !important;
}

.memos-tag-item:hover span {
  color: var(--accent-color) !important;
}

.memos-tag-item.active {
  background-color: var(--accent-color);
  color: #ffffff !important;
}

.memos-tag-item.active span {
  color: #ffffff !important;
}

.memos-tag-item.active span:last-child {
  background-color: rgba(255, 255, 255, 0.25) !important;
  color: #ffffff !important;
}

/* Post Tag Badges on details and lists */
.post-tag {
  background-color: var(--accent-bg);
  color: var(--accent-color) !important;
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  margin-right: 0.4rem;
  transition: background-color 0.2s, color 0.2s;
  text-decoration: none !important;
  display: inline-block;
}

.post-tag:hover {
  background-color: var(--accent-color);
  color: #ffffff !important;
  text-decoration: none !important;
}

/* Responsive adjustments */
@media (max-width: 820px) {
  .blog-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .blog-sidebar {
    position: static;
    margin-top: 1rem;
  }
}