/* ========================================
   REFLECTIVE NOMAD - PHILOSOPHY JOURNAL
   Minimalist academic typography design
   ======================================== */

:root {
  /* Color palette: Minimalist academic aesthetic */
  --color-text: #222222;
  --color-text-secondary: #4a4a4a;
  --color-text-light: #6b6b6b;
  --color-bg: #ffffff;
  --color-bg-subtle: #fafafa;
  --color-border: #e5e5e5;
  --color-accent-blue: #2c5aa0;
  --color-accent-blue-hover: #1e3f6b;
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --font-serif: 'Source Serif 4', 'Georgia', serif;
  --font-mono: 'Monaco', 'Courier New', monospace;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  
  /* Typography properties */
  --line-height: 1.75;
  --line-height-heading: 1.3;
  --letter-spacing: 0;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-bg);
  letter-spacing: var(--letter-spacing);
}

.page-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ========================================
   HEADER & NAVIGATION
   ======================================== */

.site-header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-lg) var(--spacing-md);
}

.header-content {
  max-width: 720px;
  margin: 0 auto var(--spacing-lg);
}

.site-title {
  font-family: var(--font-sans);
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  letter-spacing: -0.5px;
  line-height: 1.2;
  color: var(--color-text);
}

.site-title a {
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.2s ease;
}

.site-title a:hover {
  color: var(--color-accent-blue);
}

.site-tagline {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--color-text-light);
  letter-spacing: 0.2px;
}

.site-nav {
  max-width: 720px;
  margin: 0 auto;
}

.nav-list {
  list-style: none;
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.nav-list a {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: all 0.2s ease;
  padding-bottom: 2px;
}

.nav-list a:hover {
  color: var(--color-accent-blue);
  border-bottom-color: var(--color-accent-blue);
}

/* ========================================
   MAIN CONTENT
   ======================================== */

.main-content {
  flex: 1;
  max-width: 720px;
  width: 100%;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
}

/* ========================================
   TYPOGRAPHY: HEADINGS
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  line-height: var(--line-height-heading);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
  font-weight: 600;
}

h1 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-top: 0;
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.5px;
}

h2 {
  font-size: 1.6rem;
  font-weight: 600;
  margin-top: var(--spacing-xl);
  border-top: 2px solid var(--color-border);
  padding-top: var(--spacing-lg);
}

h3 {
  font-size: 1.3rem;
  font-weight: 600;
}

h4 {
  font-size: 1.1rem;
  font-weight: 600;
}

h5, h6 {
  font-size: 1rem;
  font-weight: 600;
}

/* ========================================
   TYPOGRAPHY: BODY TEXT
   ======================================== */

p {
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height);
  text-align: left;
}

/* ========================================
   TYPOGRAPHY: LINKS & EMPHASIS
   ======================================== */

a {
  color: var(--color-accent-blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: all 0.2s ease;
}

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

strong {
  font-weight: 600;
  color: var(--color-text);
  font-family: var(--font-sans);
}

em {
  font-style: italic;
  color: var(--color-text);
}

/* ========================================
   TYPOGRAPHY: LISTS
   ======================================== */

ul, ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

li {
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height);
}

/* ========================================
   TYPOGRAPHY: BLOCKQUOTES
   ======================================== */

blockquote {
  border-left: 3px solid var(--color-accent-blue);
  padding-left: var(--spacing-md);
  margin-left: 0;
  margin-right: 0;
  margin-bottom: var(--spacing-md);
  margin-top: var(--spacing-md);
  color: var(--color-text-secondary);
  font-style: italic;
  line-height: 1.8;
  font-size: 1rem;
}

blockquote p {
  margin-bottom: 0;
}

/* ========================================
   CODE & PREFORMATTED TEXT
   ======================================== */

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background-color: var(--color-bg-subtle);
  padding: 0.2em 0.4em;
  border-radius: 3px;
  color: #c85c3c;
  word-break: break-word;
}

pre {
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: var(--spacing-md);
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
  line-height: 1.5;
}

pre code {
  background-color: transparent;
  color: var(--color-text);
  padding: 0;
  border-radius: 0;
}

/* ========================================
   HORIZONTAL RULES
   ======================================== */

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--spacing-lg) 0;
}

/* ========================================
   TABLES
   ======================================== */

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-md);
  font-size: 0.95rem;
  font-family: var(--font-serif);
}

thead {
  background-color: var(--color-bg-subtle);
  border-bottom: 1px solid var(--color-border);
}

th {
  padding: var(--spacing-sm);
  text-align: left;
  font-weight: 600;
  color: var(--color-text);
  font-family: var(--font-sans);
}

td {
  padding: var(--spacing-sm);
  border-bottom: 1px solid var(--color-border);
}

tbody tr:nth-child(even) {
  background-color: var(--color-bg-subtle);
}

/* ========================================
   IMAGES
   ======================================== */

img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: var(--spacing-md) 0;
  border-radius: 2px;
}

/* ========================================
   FOOTER
   ======================================== */

.site-footer {
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-md);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-light);
  font-size: 0.9rem;
  font-family: var(--font-sans);
  background-color: var(--color-bg-subtle);
}

/* ========================================
   RESPONSIVE: TABLET (≤ 768px)
   ======================================== */

@media (max-width: 768px) {
  :root {
    font-size: 15px;
  }

  body {
    font-size: 16px;
  }

  .site-header {
    padding: var(--spacing-md) var(--spacing-md);
  }

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

  .site-title {
    font-size: 1.6rem;
  }

  .site-tagline {
    font-size: 0.9rem;
  }

  .nav-list {
    gap: var(--spacing-md);
  }

  .nav-list a {
    font-size: 0.9rem;
  }

  .main-content {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  h1 {
    font-size: 1.9rem;
  }

  h2 {
    font-size: 1.4rem;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
  }

  h3 {
    font-size: 1.2rem;
  }

  h4 {
    font-size: 1rem;
  }

  p {
    font-size: 16px;
  }

  blockquote {
    font-size: 0.95rem;
  }

  ul, ol {
    margin-left: var(--spacing-md);
  }
}

/* ========================================
   RESPONSIVE: MOBILE (≤ 480px)
   ======================================== */

@media (max-width: 480px) {
  :root {
    font-size: 14px;
  }

  body {
    font-size: 15px;
  }

  .site-header {
    padding: var(--spacing-md) var(--spacing-sm);
  }

  .header-content {
    margin-bottom: var(--spacing-sm);
  }

  .site-title {
    font-size: 1.4rem;
  }

  .site-tagline {
    font-size: 0.85rem;
  }

  .nav-list {
    gap: var(--spacing-sm);
    flex-direction: column;
  }

  .nav-list a {
    font-size: 0.85rem;
  }

  .main-content {
    padding: var(--spacing-md) var(--spacing-sm);
  }

  h1 {
    font-size: 1.6rem;
  }

  h2 {
    font-size: 1.2rem;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
  }

  h3 {
    font-size: 1.1rem;
  }

  h4 {
    font-size: 0.95rem;
  }

  p {
    font-size: 15px;
  }

  blockquote {
    font-size: 0.9rem;
    padding-left: var(--spacing-md);
  }

  ul, ol {
    margin-left: var(--spacing-md);
  }
}

/* ========================================
   DARK MODE
   ======================================== */

@media (prefers-color-scheme: dark) {
  :root {
    --color-text: #e8e8e8;
    --color-text-secondary: #b8b8b8;
    --color-text-light: #909090;
    --color-bg: #1a1a1a;
    --color-bg-subtle: #242424;
    --color-border: #3a3a3a;
    --color-accent-blue: #5a8fd6;
    --color-accent-blue-hover: #7ba3e0;
  }

  blockquote {
    border-left-color: var(--color-accent-blue);
  }

  .site-header {
    background-color: var(--color-bg);
    border-bottom-color: var(--color-border);
  }

  .site-footer {
    background-color: var(--color-bg-subtle);
    border-top-color: var(--color-border);
  }
}