/* ========================================
   Blaz Kos - Personal Website
   Inspired by darioamodei.com design
   ======================================== */

/* CSS Variables - Light Theme (default) */
:root {
  --color-bg: #faf9f7;
  --color-text: #1a1a1a;
  --color-text-secondary: #666666;
  --color-border: #e5e5e5;
  --color-link: #1a1a1a;
  --color-link-hover: #555555;
  --color-accent: #2563eb;
  --font-serif: 'Source Serif 4', 'Georgia', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 680px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;
}

/* Dark Theme */
[data-theme="dark"] {
  --color-bg: #141414;
  --color-text: #e8e8e8;
  --color-text-secondary: #a0a0a0;
  --color-border: #333333;
  --color-link: #e8e8e8;
  --color-link-hover: #cccccc;
  --color-accent: #60a5fa;
}

/* Prevent flash of wrong theme */
html {
  background-color: var(--color-bg);
}

/* Base Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Body */
body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Apply transitions after load to prevent flash */
body.transitions-enabled {
  transition: background-color 0.2s ease, color 0.2s ease;
}

body.transitions-enabled * {
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

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

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-title {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.site-logo {
  height: 48px;
  width: 48px;
}

[data-theme="dark"] .site-logo {
  filter: invert(1);
  opacity: 0.85;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-link {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  text-decoration: none;
}

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

/* Theme Toggle */
/* Dropdown Menu */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-toggle {
  cursor: pointer;
}

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.5rem 0;
  min-width: 180px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  z-index: 200;
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu {
  display: block;
}

.nav-dropdown-menu a {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
}

.nav-dropdown-menu a:hover {
  background: var(--color-border);
  color: var(--color-text);
}

/* Language Switch */
.lang-switch {
  font-weight: 500;
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 0.85rem;
}

.lang-switch:hover {
  background-color: var(--color-border);
  text-decoration: none;
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  border-radius: 4px;
}

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

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

.theme-toggle .sun-icon {
  display: none;
}

.theme-toggle .moon-icon {
  display: block;
}

[data-theme="dark"] .theme-toggle .sun-icon {
  display: block;
}

[data-theme="dark"] .theme-toggle .moon-icon {
  display: none;
}

/* Main Content */
.main {
  padding: var(--spacing-xxl) 0 var(--spacing-sm) 0;
}

/* Bio Section */
.bio {
  margin-bottom: var(--spacing-xxl);
}

.bio-text {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  line-height: 1.5;
  color: var(--color-text);
  text-wrap: balance;
}

.bio-text a {
  color: var(--color-text);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

.bio-more {
  margin-top: var(--spacing-sm);
}

.bio-more-toggle {
  background: none;
  border: none;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.bio-more-toggle:hover {
  color: var(--color-text);
}

.bio-expanded {
  display: none;
  margin-top: var(--spacing-md);
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.bio-expanded.show {
  display: block;
}

/* Content Sections */
.section {
  margin-bottom: var(--spacing-xl);
}

.section-title {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
}

/* Content List */
.content-list {
  list-style: none;
}

.compact-list {
  list-style: disc;
  padding-left: var(--spacing-lg);
}

.compact-list li {
  margin-bottom: var(--spacing-xs);
}

.compact-list a {
  font-size: 1.05rem;
  color: var(--color-text);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

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

.content-list a {
  font-size: 1.05rem;
  color: var(--color-text);
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
  gap: var(--spacing-xs);
}

.content-list a:hover {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.content-list .date {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.content-list .category {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-left: var(--spacing-xs);
}

/* External Link Icon */
.external-link::after {
  content: " \2197";
  font-size: 0.9em;
}

/* Article Page */
.article {
  max-width: var(--max-width);
}

.article-header {
  margin-bottom: var(--spacing-xl);
}

.article-title {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.article-meta {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.article-meta span::after {
  content: "\00b7";
  margin-left: var(--spacing-sm);
}

.article-meta span:last-child::after {
  content: none;
}

/* Article Content */
.article-content {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  line-height: 1.8;
}

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

.article-content h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.article-content h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

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

.article-content li {
  margin-bottom: var(--spacing-xs);
}

.article-content blockquote {
  border-left: 3px solid var(--color-border);
  padding-left: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

.article-content a {
  color: var(--color-text);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

.article-content strong {
  font-weight: 600;
}

/* Back Link */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  margin-bottom: var(--spacing-lg);
}

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

.back-link::before {
  content: "\2190";
}

/* Archive Page */
.archive-list {
  list-style: none;
}

.archive-year {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

.archive-year:first-child {
  margin-top: 0;
}

.archive-list li {
  margin-bottom: var(--spacing-sm);
  display: flex;
  gap: var(--spacing-md);
  align-items: baseline;
}

.archive-list .date {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  min-width: 80px;
  flex-shrink: 0;
}

.archive-list a {
  font-size: 1.05rem;
  color: var(--color-text);
  text-decoration: none;
}

.archive-list a:hover {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

/* Footer */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  margin-top: 1rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.footer-links {
  display: flex;
  gap: var(--spacing-md);
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  text-decoration: none;
}

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

.footer-copyright {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.footer-copyright a {
  color: var(--color-text-secondary);
  text-decoration: underline;
}

.footer-copyright a:hover {
  color: var(--color-text);
}

/* Hamburger Button */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  flex-direction: column;
  gap: 5px;
  z-index: 301;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Responsive Design */
@media (max-width: 767px) {
  body {
    font-size: 20px;
  }

  .bio-text {
    font-size: 1.45rem;
  }

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

  .article-content {
    font-size: 1.25rem;
  }

  .hamburger {
    display: flex;
  }

  .header-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-bg);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    z-index: 300;
  }

  .header-nav.open {
    display: flex;
  }

  .header-nav .nav-link {
    font-size: 1.35rem;
  }

  .header-nav .nav-dropdown {
    text-align: center;
  }

  .header-nav .nav-dropdown-menu {
    position: static;
    display: none;
    box-shadow: none;
    border: none;
    padding: 0;
    min-width: auto;
    text-align: center;
    background: transparent;
  }

  .header-nav .nav-dropdown.open .nav-dropdown-menu {
    display: block;
  }

  .header-nav .nav-dropdown-menu a {
    font-size: 1.1rem;
    padding: 0.4rem 1rem;
  }

  .site-logo {
    height: 58px;
    width: 58px;
  }

  .section-title {
    font-size: 1rem;
  }

  .content-list a {
    font-size: 1.25rem;
  }

  .content-list .date {
    font-size: 1.05rem;
  }

  .compact-list a {
    font-size: 1.25rem;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }

  .archive-list li {
    flex-direction: column;
    gap: 0.25rem;
  }
}

/* ========================================
   MindDrive — Learning Roadmap Tracker
   ======================================== */

/* Overall Progress */
.md-progress-overall {
  margin-bottom: var(--spacing-xl);
}

.md-progress-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: var(--spacing-xs);
}

.md-progress-label {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
}

.md-progress-count {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.md-progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--color-border);
  border-radius: 4px;
  overflow: hidden;
}

.md-progress-fill {
  height: 100%;
  background-color: var(--color-accent);
  border-radius: 4px;
  transition: width 0.3s ease;
}

/* Section */
.md-section {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.md-section:last-child {
  border-bottom: none;
}

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

.md-section-title-row {
  margin-bottom: var(--spacing-sm);
}

.md-section-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.25rem;
  line-height: 1.3;
}

.md-section-subtitle {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.md-section-progress {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.md-section-progress .md-progress-bar {
  flex: 1;
  height: 6px;
}

.md-section-count {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  white-space: nowrap;
  min-width: 32px;
  text-align: right;
}

/* Items */
.md-items {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--spacing-md) 0;
}

.md-item {
  margin-bottom: 2px;
}

.md-item-label {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.5rem 0.25rem;
  border-radius: 4px;
}

.md-item-check {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-text-secondary);
  border-radius: 4px;
  margin-top: 2px;
  position: relative;
}

.md-item-check--checked {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.md-item-check--checked::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 1px;
  width: 6px;
  height: 10px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.md-item-text {
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
}

.md-item--checked .md-item-text {
  color: var(--color-text-secondary);
}

/* Section Outcome */
.md-section-outcome {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-style: italic;
  line-height: 1.6;
  color: var(--color-text-secondary);
  border-left: 3px solid var(--color-accent);
  padding-left: var(--spacing-md);
  margin-top: var(--spacing-sm);
}

/* MindDrive Responsive */
@media (max-width: 767px) {
  .md-section-title {
    font-size: 1.15rem;
  }

  .md-item-label {
    gap: 0.5rem;
  }

  .md-item-text {
    font-size: 0.95rem;
  }

  .md-section-outcome {
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .md-progress-header {
    flex-direction: column;
    gap: 0.25rem;
  }

  .md-section-title {
    font-size: 1.05rem;
  }

  .md-item-check {
    width: 18px;
    height: 18px;
  }

  .md-item-check--checked::after {
    left: 4px;
    top: 1px;
    width: 5px;
    height: 9px;
  }
}