/* Modern Minimalist Design System for Gentlemanimal */
/* Inspired by carnbo.org: Zero-rot, pure CSS, accessible, fast */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&family=Plus+Jakarta+Sans:wght@500;600;700;800&display=swap');

:root {
  color-scheme: dark light;
  
  /* Color Palette - Dark Mode Defaults */
  --bg-main: #0b0f19;
  --bg-card: #151c2c;
  --bg-card-hover: #1e283d;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.2);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent: #cbd5e1;
  --accent-glow: rgba(203, 213, 225, 0.12);
  --accent-pill: #1e293b;
  --accent-pill-text: #e2e8f0;
  
  --code-bg: #070a10;
  --code-border: rgba(255, 255, 255, 0.1);
  --quote-border: #475569;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.3);
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Plus Jakarta Sans', var(--font-sans);
  --font-mono: 'JetBrains Mono', monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Mode Overrides */
[data-theme="light"] {
  color-scheme: light;
  
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --border-color: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.25);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --accent: #334155;
  --accent-glow: rgba(51, 65, 85, 0.08);
  --accent-pill: #e2e8f0;
  --accent-pill-text: #1e293b;
  
  --code-bg: #f1f5f9;
  --code-border: rgba(0, 0, 0, 0.08);
  --quote-border: #94a3b8;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
}

/* CSS Reset & General Setup */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 1.25rem;
}

.site-container {
  width: 100%;
  max-width: 720px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 2.5rem 0 3rem 0;
}

/* Header & Nav */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: var(--accent-pill);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.brand-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
}

nav a:hover, nav a.active {
  color: var(--text-primary);
}

.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.theme-toggle:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* Main Content Area */
main {
  flex: 1;
}

/* Hero Section */
.hero {
  margin-bottom: 3.5rem;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.hero .subtitle {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

.hero p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.hero a {
  color: var(--text-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background: var(--accent-pill);
  color: var(--accent-pill-text);
  font-size: 0.85rem;
  font-weight: 500;
  border: 1px solid var(--border-color);
}

/* Sections */
section {
  margin-bottom: 3.5rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.section-title a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
}

.section-title a:hover {
  color: var(--text-primary);
}

/* Article & Project Cards */
.card-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card {
  display: block;
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

div.card:hover {
  border-color: var(--border-hover);
}

a.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.4rem;
}

.card-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
}

.card-title-link {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition);
}

.card-title-link:hover {
  color: var(--text-primary);
  text-decoration: underline;
}

.card-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.card-excerpt {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.card-footer-links {
  margin-top: 0.75rem;
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.card-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.card-link-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

/* Tag / Badge items inside cards */
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.75rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  color: var(--text-secondary);
}

/* Post Layout */
.article-header {
  margin-bottom: 2.5rem;
}

.article-title {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.article-body {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.article-body p {
  margin-bottom: 1.5rem;
}

.article-body h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 2rem 0 1rem 0;
}

.article-body h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 1.75rem 0 0.75rem 0;
}

.article-body ul, .article-body ol {
  margin: 0 0 1.5rem 1.5rem;
}

.article-body li {
  margin-bottom: 0.5rem;
}

.article-body blockquote {
  border-left: 3px solid var(--quote-border);
  padding-left: 1.25rem;
  margin: 1.5rem 0;
  color: var(--text-primary);
  font-style: italic;
}

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--code-bg);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  border: 1px solid var(--code-border);
}

.article-body pre {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

.article-body pre code {
  background: transparent;
  padding: 0;
  border: none;
  font-size: 0.9rem;
}

/* Footer */
footer {
  margin-top: auto;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.social-links {
  display: flex;
  gap: 1.25rem;
}

.social-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
}

.social-links a:hover {
  color: var(--text-primary);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  margin-bottom: 2rem;
  transition: var(--transition);
}

.back-link:hover {
  color: var(--text-primary);
}

/* Mobile Responsiveness */
@media (max-width: 640px) {
  .site-container {
    padding: 1.5rem 0;
  }
  
  header {
    margin-bottom: 2.5rem;
  }
  
  .hero h1 {
    font-size: 1.75rem;
  }
  
  footer {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }
}