/* ==========================
   Base Variables & Reset
========================== */
:root {
  --bg-color: #f9f9f9;
  --text-color: #222;
  --header-bg: #fff;
  --container-bg: #fff;
  --footer-color: #777;
  --link-color: #0066cc;
  --link-hover: #004a99;
  --accent: #ffb400;
  --card-border: #e5e5e5;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', 'Helvetica Neue', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.7;
  transition: background-color 0.4s ease, color 0.4s ease;
}

a {
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

h1, h2, h3 {
  margin-bottom: 0.5em;
  line-height: 1.3;
}

p {
  margin-bottom: 1.2em;
  font-size: 1.05rem;
  color: #444;
}

ul {
  margin: 1em 0;
  padding-left: 1.5em;
}

.date {
  font-size: 0.9rem;
  color: #888;
  margin-bottom: 1em;
}

/* ==========================
   Header
========================== */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  background-color: var(--header-bg);
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  position: sticky;
  top: 0;
  z-index: 1000;
}

header h1 {
  font-size: 1.6rem;
  margin: 0;
}

header h1 a {
  color: var(--text-color);
}

#darkToggle {
  padding: 6px 12px;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  background-color: #eee;
  color: #333;
  border-radius: 8px;
  transition: background-color 0.3s ease, transform 0.3s ease;
}

#darkToggle:hover {
  background-color: #ddd;
  transform: rotate(10deg);
}

/* ==========================
   Container
========================== */
.container {
  max-width: 800px;
  margin: 40px auto;
  padding: 25px 25px 40px;
  background-color: var(--container-bg);
  border-radius: 14px;
  box-shadow: 0 6px 16px rgba(0,0,0,0.05);
  transition: box-shadow 0.3s ease, background-color 0.4s ease;
}

/* ==========================
   Hero Section (Homepage)
========================== */
.hero {
  text-align: center;
  padding: 40px 20px 60px;
  border-bottom: 2px solid var(--card-border);
  margin-bottom: 50px;
}

.hero h2 {
  font-size: 2.5rem;
  margin-bottom: 0.3em;
  color: var(--text-color);
}

.tagline {
  font-size: 1.3rem;
  font-style: italic;
  color: var(--accent);
  margin-bottom: 1.5em;
}

.intro {
  font-size: 1.15rem;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
  color: #555;
}

/* ==========================
   Currently Reading Section
========================== */
.currently-reading {
  margin-top: 30px;
  margin-bottom: 50px;
  padding: 30px;
  background-color: rgba(255, 180, 0, 0.05);
  border-radius: 12px;
  border: 1px solid var(--card-border);
}

.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.book-item {
  padding: 20px;
  background-color: var(--container-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.book-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.book-item h4 {
  margin: 0 0 8px 0;
  font-size: 1.1rem;
  color: var(--text-color);
  line-height: 1.4;
}

.book-author {
  margin: 0;
  font-size: 0.9rem;
  color: #888;
  font-style: italic;
}

/* ==========================
   Blog Posts Section
========================== */
.blog-posts {
  margin-top: 30px;
}

.section-title {
  font-size: 1.8rem;
  margin-bottom: 30px;
  color: var(--text-color);
  border-bottom: 2px solid var(--accent);
  padding-bottom: 10px;
}

.post-card {
  padding: 30px;
  margin-bottom: 30px;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  background-color: var(--container-bg);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.1);
  border-color: var(--accent);
}

.post-card h3 {
  font-size: 1.7rem;
  margin-bottom: 8px;
}

.post-card h3 a {
  color: var(--text-color);
  transition: color 0.3s ease;
}

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

.excerpt {
  font-size: 1rem;
  line-height: 1.7;
  color: #666;
}

.read-more {
  display: inline-block;
  margin-top: 10px;
  font-weight: 600;
  color: var(--accent);
  transition: color 0.3s ease, transform 0.3s ease;
}

.read-more:hover {
  color: darkorange;
  transform: translateX(5px);
}

/* ==========================
   Article Pages (Full Post)
========================== */
article {
  margin-bottom: 40px;
}

article h2 {
  font-size: 1.9rem;
  margin-bottom: 8px;
}

blockquote {
  font-style: italic;
  padding: 0.5em 1em;
  border-left: 4px solid var(--accent);
  margin: 1.5em 0;
  color: #555;
  background-color: rgba(0,0,0,0.03);
  border-radius: 6px;
}

/* ==========================
   Footer
========================== */
footer {
  text-align: center;
  padding: 20px 0;
  margin-top: 60px;
  color: var(--footer-color);
  font-size: 0.9rem;
}

/* ==========================
   Dark Mode
========================== */
body.dark-mode {
  --bg-color: #1b1b1b;
  --text-color: #f1f1f1;
  --header-bg: #242424;
  --container-bg: #2b2b2b;
  --footer-color: #aaa;
  --link-color: #4ea0ff;
  --link-hover: #73b9ff;
  --accent: #ff9800;
  --card-border: #3a3a3a;
}

body.dark-mode p {
  color: #ddd;
}

body.dark-mode .intro {
  color: #ccc;
}

body.dark-mode .excerpt {
  color: #aaa;
}

body.dark-mode blockquote {
  color: #ddd;
  background-color: rgba(255,255,255,0.05);
}