:root {
  /* ===== SPACING ===== */
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;

  /* ===== BORDERS ===== */
  --border-radius: 12px;
  --border-radius-lg: 16px;

  /* ===== COLORS - LIGHT THEME ===== */
  --color-bg-primary: #ffd6e7;
  --color-bg-secondary: #ffb6ce;
  --color-bg-tertiary: #ff97b5;
  --color-bg-card: #fff;
  --color-text-primary: #333;
  --color-text-secondary: #777;
  --color-text-accent: #ff97b5;
  --color-text-heading: #222121;
  --color-text-white: #fff;
  --color-border-primary: #ffb6ce;
  --color-border-secondary: #ff97b5;
}

.dark {
  --color-bg-primary: #101624;
  --color-bg-secondary: #22304a;
  --color-bg-tertiary: #2a3a5a;
  --color-bg-card: #18213a;
  --color-text-primary: #f3f3f3;
  --color-text-secondary: #b0b8c1;
  --color-text-accent: #b0b8c1;
  --color-text-heading: #f3f3f3;
  --color-border-primary: #22304a;
  --color-border-secondary: #2a3a5a;
}

/* ===== BASE STYLES ===== */
*, *::before, *::after { box-sizing: border-box; }

body {
  overflow-x: hidden;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color .3s, color .3s;
}

/* ===== LAYOUT ===== */
.container { max-width: 800px; margin: 0 auto; padding: var(--spacing-md); }

.main-container {
  display: flex;
  flex: 1;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  padding: 0 var(--spacing-md);
  align-items: flex-start;
}

.main-content { flex: 1; padding: 0 var(--spacing-md); }

/* ===== CARDS ===== */
.page-content, .blog-post-content, .blog-post,
.subscribe-widget, .sidebar-widget, .welcome-container {
  background: var(--color-bg-card);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  margin-bottom: var(--spacing-lg);
  transition: all .3s ease;
}

/* ===== HEADER & FOOTER ===== */
header, footer {
  padding: var(--spacing-lg) 0;
  text-align: center;
  margin-bottom: var(--spacing-lg);
  background: var(--color-bg-secondary);
}

header { border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg); }
footer { margin-top: auto; border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0; }

.site-title { font-size: 2.5rem; margin-bottom: var(--spacing-sm); color: var(--color-text-heading); }
.site-subtitle { font-size: 1.2rem; color: var(--color-text-secondary); font-weight: 400; }

/* ===== NAVIGATION ===== */
nav {
  padding: var(--spacing-lg) 0;
  text-align: center;
  margin-bottom: var(--spacing-md);
  background: var(--color-bg-tertiary);
  border-radius: var(--border-radius);
}

nav .container {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

nav ul {
  margin: 0 auto;
  display: flex;
  justify-content: center;
  list-style: none;
  gap: var(--spacing-lg);
}

nav a {
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  transition: all .3s ease;
}

nav a:hover { background: var(--color-bg-secondary); }
.dark nav a:hover { background: var(--color-bg-tertiary); }

.theme-toggle-container {
  position: absolute;
  right: var(--spacing-lg);
  top: 50%;
  transform: translateY(-50%);
}

/* ===== TYPOGRAPHY ===== */
.page-title {
  margin-bottom: var(--spacing-md);
  text-align: center;
  color: var(--color-text-heading);
  font-size: 2.2rem;
}

h1, h2, h3 { color: var(--color-text-heading); }

.page-content, .blog-post-content { border: 2px solid var(--color-border-primary); }

.page-content h1, .blog-post-content h1 {
  margin-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--color-border-primary);
  padding-bottom: var(--spacing-sm);
}

.page-content h2, .blog-post-content h2 { margin: var(--spacing-lg) 0 var(--spacing-sm); }

p { margin-bottom: var(--spacing-md); line-height: 1.7; }
ul, ol { margin-bottom: var(--spacing-md); padding-left: var(--spacing-lg); }
li { margin-bottom: var(--spacing-sm); }

code, pre {
  background: var(--color-bg-primary);
  border-radius: var(--border-radius);
  font-family: 'Courier New', monospace;
  font-size: .9em;
}

code { padding: 2px 6px; }
pre {
  padding: var(--spacing-md);
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
  border: 1px solid var(--color-border-primary);
}

blockquote {
  border-left: 4px solid var(--color-border-primary);
  padding-left: var(--spacing-md);
  font-style: italic;
  color: var(--color-text-secondary);
}

img, .blog-post-content figure img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  margin: var(--spacing-lg) auto;
  display: block;
}

table { width: 100%; border-collapse: collapse; margin-bottom: var(--spacing-md); }
th, td { padding: var(--spacing-sm); border: 1px solid var(--color-border-primary); text-align: left; }
th { background: var(--color-bg-primary); font-weight: 600; }

/* ===== WELCOME ===== */
.welcome-container { margin-top: 0; border-left: 4px solid var(--color-border-primary); line-height: 1.7; color: var(--color-text-secondary); font-style: italic; }

/* ===== BLOG ===== */
.blog-posts { display: flex; flex-direction: column; gap: 1rem; margin-top: var(--spacing-lg); }

.blog-post { border: 2px solid transparent; }
.blog-post:hover { transform: translateY(-5px); box-shadow: 0 8px 20px rgba(0,0,0,0.12); border-color: var(--color-border-primary); }

.blog-post h2 { margin-bottom: var(--spacing-sm); font-size: 1.5rem; }
.blog-post h2 a { color: inherit; text-decoration: none; transition: color .3s ease; display: block; padding: 4px 0; }
.blog-post h2 a:hover { color: var(--color-text-accent); }

.post-meta { color: var(--color-text-secondary); font-size: .9rem; margin-bottom: var(--spacing-md); font-style: italic; }

.read-more {
  display: inline-block;
  margin-top: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  border-radius: var(--border-radius);
  font-weight: 500;
  transition: all .3s ease;
  border: 1px solid transparent;
  align-self: center;
}
.read-more:hover { background: var(--color-bg-secondary); color: var(--color-text-white); border-color: var(--color-bg-tertiary); }

.post-preview { display: flex; gap: var(--spacing-lg); align-items: center; height: 100%; }

.blog-post .post-image {
  width: 350px; height: 350px;
  object-fit: contain;
  border-radius: var(--border-radius);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: var(--spacing-sm);
}

.post-content { flex: 1; display: flex; flex-direction: column; justify-content: center; text-align: center; padding: var(--spacing-sm); }

/* ===== SIDEBAR ===== */
.sidebar { width: 300px; padding: var(--spacing-lg) var(--spacing-md); flex-shrink: 0; }
.subscribe-widget h3, .sidebar-widget h3 { margin-bottom: var(--spacing-sm); font-size: 1.3rem; }
.subscribe-widget p { margin-bottom: var(--spacing-md); color: var(--color-text-secondary); line-height: 1.5; }

.subscribe-widget form { display: flex; flex-direction: column; gap: var(--spacing-sm); }
.subscribe-widget input { padding: var(--spacing-sm); border-radius: var(--border-radius); font-family: inherit; }
.subscribe-widget input[type=email] { border: 1px solid var(--color-border-primary); }
.subscribe-widget input[type=submit] {
  background: var(--color-bg-tertiary);
  color: var(--color-text-white);
  border: none;
  cursor: pointer;
  font-weight: 500;
  transition: background-color .3s ease;
}
.subscribe-widget input[type=submit]:hover { background: var(--color-bg-secondary); }
.form-note { font-size: 12px; margin-top: 8px; color: var(--color-text-secondary); font-style: italic; }

.sidebar-widget ul { list-style: none; }
.sidebar-widget li { margin-bottom: var(--spacing-sm); padding-left: var(--spacing-sm); position: relative; }
.sidebar-widget li:before { content: "•"; color: var(--color-border-primary); position: absolute; left: 0; }
.sidebar-widget + .sidebar-widget,
.subscribe-widget + .sidebar-widget {
  margin-top: var(--spacing-md);
}

/* ===== SOCIAL ===== */
.social-links { display: flex; justify-content: center; gap: var(--spacing-md); margin-bottom: var(--spacing-md); }
.social-links a {
  display: inline-block;
  padding: var(--spacing-sm);
  background: var(--color-bg-primary);
  border-radius: var(--border-radius);
  transition: background-color .3s ease;
}
.social-links a:hover { background: var(--color-bg-tertiary); color: var(--color-text-white); }

.copyright { color: var(--color-text-secondary); font-size: .9rem; }

/* ===== LINKS ===== */
a { color: var(--color-text-primary); text-decoration: none; transition: all .3s ease; }
a:hover { color: var(--color-text-accent); }

/* ===== DARK THEME ===== */
.dark .page-content, .dark .blog-post-content {
  background: var(--color-bg-card);
  border: 2px solid var(--color-border-secondary);
}
.dark .page-content h1, .dark .blog-post-content h1,
.dark .page-content blockquote, .dark .blog-post-content blockquote {
  border-color: var(--color-border-secondary);
}
.dark .blog-post:hover { border-color: var(--color-border-secondary); }
.dark .read-more { background: var(--color-bg-tertiary); }
.dark .page-content code, .dark .blog-post-content code,
.dark .page-content pre, .dark .blog-post-content pre,
.dark .page-content th, .dark .blog-post-content th {
  background: var(--color-bg-secondary);
  border-color: var(--color-border-secondary);
}
.dark .subscribe-widget input[type=email] { border: 1px solid var(--color-border-secondary); }
.dark .sidebar-widget li:before { color: var(--color-border-secondary); }
.dark .social-links a { background: var(--color-bg-tertiary); }
.dark th, .dark td { border-color: var(--color-border-secondary); }

/* ===== RESPONSIVE ===== */

/* Tablets (≤968px) */
@media (max-width: 968px) {
  .main-container {
    flex-direction: column;
    padding: 0;
    gap: var(--spacing-lg);
    width: 100%;
    max-width: 100%;
  }

  .main-content,
  .sidebar {
    width: 100%;
    padding: 0;
    margin: 0;
  }

  .main-content {
    order: 1;
  }

  .sidebar {
    order: 2;
    padding: 0 var(--spacing-md);
  }

  .page-content,
  .blog-post-content,
  .blog-post,
  .subscribe-widget,
  .sidebar-widget {
    width: 100%;
    box-sizing: border-box;
    padding: var(--spacing-lg) var(--spacing-md);
    margin: 0 auto var(--spacing-lg);
    max-width: 95%;
  }

  footer {
    margin-top: var(--spacing-lg);
  }
}

/* Phones (≤768px) */
@media (max-width: 768px) {
  nav .container {
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
  }

  nav ul {
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
    padding: 0 var(--spacing-sm);
    order: 1;
    width: 100%;
  }

  .theme-toggle-container {
    position: static;
    transform: none;
    margin-top: var(--spacing-sm);
    order: 2;
  }

  .container {
    padding: var(--spacing-sm);
    width: 100%;
    max-width: 100%;
  }

  .site-title {
    font-size: 2rem;
  }

  .page-title {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
  }

  header {
    margin-bottom: var(--spacing-md);
  }

  nav {
    margin-top: var(--spacing-md);
  }

  .blog-post,
  .sidebar,
  .page-content,
  .blog-post-content,
  .subscribe-widget,
  .sidebar-widget,
  .welcome-container {
    padding: var(--spacing-md);
    margin: 0 auto var(--spacing-lg);
    width: calc(100% - var(--spacing-sm) * 2);
  }

  .subscribe-widget,
  .sidebar-widget {
    border-radius: var(--border-radius);
  }

  .subscribe-widget h3,
  .sidebar-widget h3 {
    font-size: 1.2rem;
  }

  header,
  footer {
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    margin: 0 var(--spacing-sm);
    width: calc(100% - var(--spacing-sm) * 2);
  }

  footer {
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    margin-top: var(--spacing-lg); 
  }

  .post-preview {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }

  .blog-post .post-image {
    width: 100%;
    aspect-ratio: 1 / 1;
    max-width: 100%;
    max-height: calc(100vw - var(--spacing-md) * 2);
    object-fit: cover;
    border-radius: var(--border-radius);
    margin: 0 auto var(--spacing-md);
    display: block;
  }

  .post-content {
    text-align: center;
    padding: 0;
  }

  img,
  .blog-post-content figure img {
    margin: var(--spacing-md) auto;
    width: 100%;
  }
}