/* ==========================================================================
   Heretic Design System Theme - Light & Dark Modes
   dsmenov.github.io
   ========================================================================== */

:root {
  /* Default Theme Variables (Light Mode) */
  --bg-color: #faf9f6;
  --bg-card: rgba(255, 255, 255, 0.7);
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  --bg-secondary: #f3f4f6;
  --text-color: #111827;
  --text-secondary: #4b5563;
  --text-muted: #6b7280;
  
  --accent-color: #6d28d9;       /* Deep Violet */
  --accent-secondary: #db2777;   /* Fuchsia/Pink */
  --accent-cyan: #0891b2;        /* Cyan/Teal */
  
  --border-color: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(109, 40, 217, 0.35);
  --glass-border: rgba(0, 0, 0, 0.04);
  
  --glow-shadow: 0 4px 20px rgba(0, 0, 0, 0.05), 0 0 15px rgba(109, 40, 217, 0.02);
  --glow-shadow-hover: 0 10px 30px rgba(0, 0, 0, 0.1), 0 0 25px rgba(109, 40, 217, 0.15), 0 0 40px rgba(219, 39, 119, 0.05);
  
  /* Background Details (Light Mode) */
  --dot-color: rgba(0, 0, 0, 0.025);
  --radial-glow-1: rgba(109, 40, 217, 0.04);
  --radial-glow-2: rgba(219, 39, 119, 0.03);
  --radial-glow-3: rgba(8, 145, 178, 0.025);
  
  /* Toggle Button (Light Mode) */
  --toggle-btn-bg: rgba(0, 0, 0, 0.04);
  --toggle-btn-hover: rgba(0, 0, 0, 0.08);
  
  /* Title Gradients */
  --title-gradient-start: #111827;
  --title-gradient-end: #4b5563;

  /* Fonts */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-header: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

[data-theme="dark"] {
  /* Dark Theme Variables (Heretic Matches) */
  --bg-color: #0a0a0f;
  --bg-card: rgba(18, 18, 30, 0.7);
  --bg-card-hover: rgba(24, 24, 40, 0.85);
  --bg-secondary: #0f0f18;
  --text-color: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  
  --accent-color: #8b5cf6;       /* Violet/Purple */
  --accent-secondary: #ec4899;   /* Fuchsia/Pink */
  --accent-cyan: #06b6d4;        /* Cyan/Teal */
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(139, 92, 246, 0.35);
  --glass-border: rgba(255, 255, 255, 0.05);
  
  --glow-shadow: 0 4px 20px rgba(0, 0, 0, 0.4), 0 0 15px rgba(139, 92, 246, 0.08);
  --glow-shadow-hover: 0 10px 30px rgba(0, 0, 0, 0.6), 0 0 25px rgba(139, 92, 246, 0.25), 0 0 40px rgba(236, 72, 153, 0.1);
  
  /* Background Details (Dark Mode) */
  --dot-color: rgba(255, 255, 255, 0.015);
  --radial-glow-1: rgba(139, 92, 246, 0.07);
  --radial-glow-2: rgba(236, 72, 153, 0.05);
  --radial-glow-3: rgba(6, 182, 212, 0.03);
  
  /* Toggle Button (Dark Mode) */
  --toggle-btn-bg: rgba(255, 255, 255, 0.05);
  --toggle-btn-hover: rgba(255, 255, 255, 0.1);
  
  /* Title Gradients */
  --title-gradient-start: #ffffff;
  --title-gradient-end: var(--text-secondary);
}

* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  
  /* Transition for theme swaps */
  transition: background-color 0.3s ease, color 0.3s ease;
  
  /* Dots grid pattern & Ambient Glows matching current theme */
  background-image: 
    radial-gradient(circle at 10% 15%, var(--radial-glow-1) 0%, transparent 35%),
    radial-gradient(circle at 90% 85%, var(--radial-glow-2) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, var(--radial-glow-3) 0%, transparent 50%),
    radial-gradient(var(--dot-color) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 100% 100%, 24px 24px;
  background-attachment: fixed;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-header);
  font-weight: 700;
  letter-spacing: -0.02em;
  transition: color 0.3s ease;
}

h1 {
  font-size: 2.75rem;
  margin-top: 1rem;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--title-gradient-start) 40%, var(--title-gradient-end) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Gradient text elements */
h1 strong,
h2 strong,
.gradient-text {
  background: linear-gradient(135deg, var(--accent-color), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: 1.65rem;
  color: var(--text-color);
  margin-top: 2.75rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

h2::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, rgba(139, 92, 246, 0.25), transparent);
  margin-left: 1rem;
  transition: opacity 0.3s ease;
}

h3 {
  font-size: 1.2rem;
  color: var(--text-color);
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
}

p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-top: 0;
  margin-bottom: 1.25rem;
  transition: color 0.3s ease;
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: color 0.2s ease, text-shadow 0.2s ease;
}

a:hover {
  color: var(--accent-secondary);
  text-shadow: 0 0 8px rgba(236, 72, 153, 0.3);
}

/* Header & Navigation */
.main-header {
  background-color: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 1.1rem 0;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.nav-container {
  max-width: 850px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo a {
  font-family: var(--font-header);
  font-weight: 800;
  font-size: 1.3rem;
  background: linear-gradient(135deg, var(--title-gradient-start), var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  letter-spacing: -0.03em;
  transition: background 0.3s ease;
}

.logo a:hover {
  background: linear-gradient(135deg, var(--accent-color), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 0.25rem 0;
  transition: color 0.3s ease;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: linear-gradient(to right, var(--accent-color), var(--accent-secondary));
  transition: width 0.2s ease;
}

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

.nav-links a:hover::after {
  width: 100%;
}

.nav-links i {
  font-size: 1.1rem;
}

/* Theme Switcher Button */
.theme-toggle-btn {
  background: var(--toggle-btn-bg);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s, transform 0.2s;
  width: 34px;
  height: 34px;
}

.theme-toggle-btn:hover {
  background: var(--toggle-btn-hover);
  border-color: var(--border-hover);
  color: var(--text-color);
  transform: translateY(-1px) scale(1.05);
}

.theme-toggle-btn i {
  font-size: 0.95rem !important;
}

/* Content Wrappers */
main,
.content-wrapper {
  flex: 1;
  max-width: 850px;
  width: 100%;
  margin: 3rem auto;
  padding: 0 1.5rem;
  z-index: 2;
}

/* Bullet List card wrappers */
.content-wrapper ul {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
}

/* For list-items formatting */
.content-wrapper li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.8rem;
  color: var(--text-secondary);
  font-size: 1rem;
  transition: color 0.3s ease;
}

.content-wrapper li::before {
  content: '';
  position: absolute;
  left: 0.15rem;
  top: 0.6rem;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: linear-gradient(135deg, var(--accent-color), var(--accent-cyan));
  box-shadow: 0 0 6px var(--accent-color);
}

/* Auto-wrap CV list items into modern cards */
.content-wrapper h2 + ul,
.content-wrapper p + ul {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.75rem;
  margin: 1.5rem 0 2.5rem 0;
  box-shadow: var(--glow-shadow);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease;
}

.content-wrapper h2 + ul:hover,
.content-wrapper p + ul:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--glow-shadow-hover);
}

/* Sub lists styling */
.content-wrapper li ul {
  background: none !important;
  border: none !important;
  box-shadow: none !important;
  padding: 0.5rem 0 0 1rem !important;
  margin: 0 !important;
  backdrop-filter: none !important;
}

.content-wrapper li ul li::before {
  background: var(--accent-cyan);
  box-shadow: 0 0 4px var(--accent-cyan);
}

/* Video Container Section */
.video-frame-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
  height: 0;
  overflow: hidden;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  box-shadow: var(--glow-shadow);
  margin: 3rem auto 1.5rem auto;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease, border-color 0.4s ease;
}

.video-frame-container:hover {
  transform: translateY(-8px) scale(1.01);
  border-color: var(--border-hover);
  box-shadow: var(--glow-shadow-hover);
}

.video-frame-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-link-wrapper {
  text-align: center;
  margin-bottom: 3.5rem;
}

.video-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s ease, transform 0.2s ease;
}

.video-link-btn:hover {
  color: var(--accent-color);
  transform: translateY(-1px);
}

/* GDPR Box styling */
.gdpr {
  font-size: 0.85rem;
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  padding: 1.1rem 1.4rem;
  border-radius: 12px;
  margin-bottom: 2.5rem;
  font-family: var(--font-mono);
  background-color: rgba(18, 18, 30, 0.2);
  position: relative;
  overflow: hidden;
  line-height: 1.5;
  transition: color 0.3s ease, border-color 0.3s ease, background-color 0.3s ease;
}

.gdpr::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(to bottom, var(--accent-color), var(--accent-cyan));
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.35rem;
  background: linear-gradient(135deg, var(--accent-color), var(--accent-secondary));
  color: #ffffff !important;
  border-radius: 10px;
  text-decoration: none;
  font-family: var(--font-header);
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.35);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease, filter 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(139, 92, 246, 0.55);
  filter: brightness(1.08);
}

.btn i {
  font-size: 1.05rem;
}

/* Footer Section */
footer {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  font-size: 0.9rem;
  z-index: 2;
  background-color: rgba(10, 10, 15, 0.05);
  transition: color 0.3s ease, border-color 0.3s ease;
}

footer p {
  margin: 0;
  color: var(--text-muted);
}

/* Page Break for Print */
.page-break {
  display: none;
}

/* Print Styles Override for pristine PDFs and physical pages */
@media print {
  body {
    background: none !important;
    background-color: #ffffff !important;
    color: #000000 !important;
    font-family: var(--font-sans) !important;
    font-size: 10pt !important;
  }

  .main-header,
  .btn,
  .no-print,
  footer,
  h2::after,
  .theme-toggle-btn {
    display: none !important;
  }

  main,
  .content-wrapper {
    margin: 0 !important;
    padding: 0 !important;
    max-width: 100% !important;
  }

  .content-wrapper h2 + ul,
  .content-wrapper p + ul {
    background: none !important;
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
    margin: 1rem 0 !important;
  }

  .content-wrapper li {
    color: #000000 !important;
    padding-left: 1.25rem !important;
    font-size: 9.5pt !important;
    margin-bottom: 0.4rem !important;
  }

  .content-wrapper li::before {
    background: #000000 !important;
    box-shadow: none !important;
    border-radius: 50% !important;
    width: 4px !important;
    height: 4px !important;
    top: 0.55rem !important;
  }

  .gdpr {
    border: 1px solid #cccccc !important;
    background: none !important;
    color: #555555 !important;
    font-family: inherit !important;
    padding: 0.75rem !important;
    font-size: 8pt !important;
    margin-bottom: 1.5rem !important;
  }

  .gdpr::before {
    display: none !important;
  }

  a {
    text-decoration: none !important;
    color: #000000 !important;
  }

  h1, h2, h3, h4 {
    color: #000000 !important;
    background: none !important;
    -webkit-text-fill-color: initial !important;
    page-break-after: avoid;
  }
  
  h1 {
    font-size: 20pt !important;
    margin-bottom: 1rem !important;
  }

  h2 {
    font-size: 14pt !important;
    margin-top: 1.5rem !important;
    margin-bottom: 0.75rem !important;
  }

  h3 {
    font-size: 11pt !important;
    margin-top: 1rem !important;
    margin-bottom: 0.5rem !important;
  }

  .page-break {
    display: block !important;
    page-break-after: always !important;
  }
}

/* Mobile Responsiveness Overrides */
@media (max-width: 600px) {
  h1 {
    font-size: 2rem !important;
    margin-bottom: 1.25rem !important;
  }
  
  h2 {
    font-size: 1.4rem !important;
    margin-top: 2rem !important;
    margin-bottom: 1rem !important;
    gap: 0.25rem !important;
  }

  h2::after {
    margin-left: 0.5rem !important;
  }
  
  .nav-container {
    flex-direction: column !important;
    gap: 0.75rem !important;
    padding: 0 1rem !important;
    text-align: center !important;
  }
  
  .logo a {
    font-size: 1.2rem !important;
  }
  
  .nav-links {
    gap: 1.25rem !important;
    width: 100% !important;
    justify-content: center !important;
  }
  
  main,
  .content-wrapper {
    margin: 1.5rem auto !important;
    padding: 0 1rem !important;
  }
  
  .content-wrapper h2 + ul,
  .content-wrapper p + ul {
    padding: 1.25rem !important;
    margin: 1rem 0 2rem 0 !important;
    border-radius: 12px !important;
  }
  
  .video-frame-container {
    margin: 2rem auto 1rem auto !important;
    border-radius: 12px !important;
  }
  .video-link-wrapper {
    margin-bottom: 2.5rem !important;
  }

  .gdpr {
    padding: 1rem !important;
    font-size: 0.8rem !important;
    margin-bottom: 2rem !important;
    border-radius: 8px !important;
  }

  footer {
    padding: 2rem 1rem !important;
  }
}