/* MAIN CSS FOR ANDRAS KUPCSIK */
:root {
  /* Color Palette - Light Mode */
  --bg-base: #ffffff;      /* White background */
  --bg-surface: #ffffff;   
  --bg-sidebar: #f1f5f9;   /* Light grey panel */
  --text-main: #334155;
  --text-muted: #64748b;
  --text-sidebar: #334155; /* Dark text on light sidebar */
  --text-sidebar-muted: #64748b;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  
  --border-color: #e2e8f0;
  --border-color-subtle: #f1f5f9;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;

  --btn-bg: rgba(0, 0, 0, 0.03);
  --btn-border: rgba(0, 0, 0, 0.08);
  --btn-bg-hover: rgba(0, 0, 0, 0.08);
  --profile-border: rgba(0, 0, 0, 0.05);
}

:root[data-theme="dark"] {
  /* Color Palette - Dark Mode */
  --bg-base: #334155;      /* Grey background */
  --bg-surface: #334155;   /* Grey surface */
  --bg-sidebar: #1e293b;   /* Dark grey panel */
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-sidebar: #f8fafc;
  --text-sidebar-muted: #94a3b8;
  --accent: #60a5fa;
  --accent-hover: #93c5fd;
  
  --border-color: #475569;
  --border-color-subtle: #334155;
  
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.25);

  --btn-bg: rgba(255, 255, 255, 0.05);
  --btn-border: rgba(255, 255, 255, 0.1);
  --btn-bg-hover: rgba(255, 255, 255, 0.1);
  --profile-border: rgba(255, 255, 255, 0.1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg-base: #334155;
    --bg-surface: #334155;
    --bg-sidebar: #1e293b;
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --text-sidebar: #f8fafc;
    --text-sidebar-muted: #94a3b8;
    --accent: #60a5fa;
    --accent-hover: #93c5fd;
    --border-color: #475569;
    --border-color-subtle: #334155;
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.25);
    --btn-bg: rgba(255, 255, 255, 0.05);
    --btn-border: rgba(255, 255, 255, 0.1);
    --btn-bg-hover: rgba(255, 255, 255, 0.1);
    --profile-border: rgba(255, 255, 255, 0.1);
  }
}

/* Base Clear & Defaults */
html, body {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

*, *::before, *::after {
  box-sizing: inherit;
}

body {
  background-color: var(--bg-base);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--text-main);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

h1 { font-size: 2.5rem; }
h2 { 
  font-size: 1.875rem; 
  border-bottom: 2px solid var(--border-color-subtle);
  padding-bottom: 0.5rem;
}
h3 { font-size: 1.5rem; }

p {
  margin-top: 0;
  margin-bottom: 1.5rem;
  color: var(--text-main);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  text-decoration: underline;
  color: var(--accent-hover);
}

strong {
  font-weight: 600;
}

/* Layout Grid */
.app-wrapper {
  display: flex;
  min-height: 100vh;
  flex-direction: column;
}

@media (min-width: 1024px) {
  .app-wrapper {
    flex-direction: row;
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    gap: 2rem;
  }
}

/* Sidebar Styles */
.sidebar {
  background-color: var(--bg-sidebar);
  color: var(--text-sidebar);
  padding: 3rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

@media (min-width: 1024px) {
  .sidebar {
    width: 320px;
    flex-shrink: 0;
    border-radius: var(--radius-lg);
    justify-content: flex-start;
    position: sticky;
    top: 2rem;
    max-height: calc(100vh - 4rem);
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
  }
}

.profile-img {
  width: 160px;
  height: 160px;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 4px solid var(--profile-border);
  box-shadow: var(--shadow-lg);
  margin-bottom: 1.5rem;
  transition: transform var(--transition-normal);
}

.profile-img:hover {
  transform: scale(1.03);
}

.profile-name {
  color: var(--text-sidebar);
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.75rem;
  border-bottom: none;
}

.profile-description {
  color: var(--text-sidebar-muted);
  font-size: 0.95rem;
  margin-bottom: 2rem;
  max-width: 300px;
  margin-left: auto;
  margin-right: auto;
}

/* Social Links */
.social-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
}

.link-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background-color: var(--btn-bg);
  color: var(--text-sidebar) !important;
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-weight: 500;
  text-decoration: none !important;
  border: 1px solid var(--btn-border);
  transition: all var(--transition-fast);
  backdrop-filter: blur(8px);
}

.link-btn:hover {
  background-color: var(--btn-bg-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.link-btn .icon {
  font-size: 1.1rem;
}

/* Main Content Area */
.content-area {
  flex: 1;
  background-color: var(--bg-surface);
  padding: 2.5rem 1.5rem;
  border-radius: 0;
  box-shadow: none;
}

@media (min-width: 1024px) {
  .content-area {
    padding: 3rem 4rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
  }
}

.content-wrapper {
  max-width: 800px;
  margin: 0 auto;
}

/* Content Element Overrides */
.content-wrapper ul {
  padding-left: 1.25rem;
  margin-bottom: 1.5rem;
}

.content-wrapper li {
  margin-bottom: 0.5rem;
  position: relative;
}

/* Publications list styling (based on bolding) */
.content-wrapper li strong {
  color: var(--text-main);
  display: block;
}

.content-wrapper li em {
  color: var(--text-muted);
}

/* Timeline Custom Elements */
.timeline-item {
  position: relative;
  padding-left: 2rem;
  padding-bottom: 2rem;
  border-left: 2px solid var(--border-color);
}

.timeline-item:last-child {
  border-left-color: transparent;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -7px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--accent);
  box-shadow: 0 0 0 4px var(--bg-surface);
}

.timeline-item a {
  font-weight: 500;
}

.timeline-item strong {
  display: inline-block;
  margin-bottom: 0.25rem;
  color: var(--accent);
  font-family: var(--font-display);
}

/* Footer Section */
footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

footer a {
  color: var(--text-muted);
}

footer a:hover {
  filter: brightness(0.8);
}

/* Theme Toggle Floating Button */
.global-theme-toggle {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 100;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--btn-bg);
  border: 1px solid var(--btn-border);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-main);
  font-size: 1.25rem;
  backdrop-filter: blur(8px);
}

.global-theme-toggle:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  background-color: var(--btn-bg-hover);
}

@media (max-width: 1023px) {
  .global-theme-toggle {
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
}