@import url('https://fonts.googleapis.com/css2?family=Cinzel+Decorative:wght@700;900&family=Creepster&family=Inter:wght@300;400;600;700&display=swap');

:root {
  --bg-primary: #000000;
  --bg-secondary: #080808;
  --bg-tertiary: #120303;
  --accent-red: #8b0000;
  --accent-blood: #ff0000;
  --accent-glow: rgba(255, 0, 0, 0.6);
  --accent-dark: #3a0000;
  --text-primary: #f5f5f5;
  --text-secondary: #c0c0c0;
  --text-muted: #707070;

  --font-horror: 'Creepster', cursive;
  --font-gothic: 'Cinzel Decorative', serif;
  --font-body: 'Inter', sans-serif;

  --transition-speed: 0.3s;
  --border-radius: 4px;
}

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

html {
  scroll-behavior: smooth;
  height: 100%;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--accent-red);
  border-radius: var(--border-radius);
  box-shadow: 0 0 10px var(--accent-glow);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-blood);
}

/* Background Canvas Overlay */
#background-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

/* Background Dark Overlay for better text readability */
.background-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, transparent 30%, rgba(0, 0, 0, 0.8) 100%);
  z-index: -1;
  pointer-events: none;
}

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--accent-dark);
  box-shadow: 0 5px 25px rgba(0, 0, 0, 0.9);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo a {
  font-family: var(--font-gothic);
  font-size: 2.2rem;
  color: var(--accent-blood);
  text-decoration: none;
  text-shadow: 0 0 10px var(--accent-glow), 0 0 20px var(--accent-dark);
  letter-spacing: 2px;
  transition: var(--transition-speed);
}

.logo a:hover {
  color: #fff;
  text-shadow: 0 0 15px var(--accent-blood), 0 0 30px var(--accent-blood);
  animation: flicker 0.5s infinite alternate;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 2.5rem;
}

nav ul li a {
  text-decoration: none;
  color: var(--text-secondary);
  font-family: var(--font-gothic);
  font-size: 0.95rem;
  letter-spacing: 1.5px;
  font-weight: 700;
  transition: var(--transition-speed);
  position: relative;
  padding: 0.5rem 0;
}

nav ul li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-blood);
  box-shadow: 0 0 8px var(--accent-blood);
  transition: width var(--transition-speed);
}

nav ul li a:hover {
  color: var(--accent-blood);
  text-shadow: 0 0 8px var(--accent-glow);
}

nav ul li a:hover::after {
  width: 100%;
}

nav ul li a.active {
  color: var(--accent-blood);
  text-shadow: 0 0 10px var(--accent-glow);
}

nav ul li a.active::after {
  width: 100%;
}

/* Mobile Nav Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  z-index: 101;
}

.menu-toggle span {
  display: block;
  width: 25px;
  height: 2px;
  background-color: var(--text-primary);
  transition: var(--transition-speed);
}

/* Main Layout & Page Containers */
main {
  margin-top: 75px;
  /* Offset for sticky header */
  min-height: calc(100vh - 150px);
}

section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.hero {
  height: calc(100vh - 75px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
}

.hero-tagline {
  font-family: var(--font-gothic);
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 8px;
  color: #888888;
  margin-bottom: 1.2rem;
  opacity: 0.9;
}

.hero-title {
  font-family: var(--font-gothic);
  font-size: 4.8rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 2rem;
  letter-spacing: 2px;
  position: relative;
  display: inline-block;
}

.hero-title .drop-v {
  font-size: 1.15em;
  font-weight: 900;
  vertical-align: baseline;
  margin-right: -0.05em;
  color: #ffffff;
}

.hero-title .glow-red {
  color: var(--accent-blood);
  text-shadow: 0 0 15px var(--accent-glow), 0 0 35px var(--accent-dark);
  animation: pulse 3s infinite;
}

.hero-description {
  max-width: 650px;
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  font-weight: 400;
  opacity: 0.9;
}

/* Section Headings */
.section-title {
  font-family: var(--font-gothic);
  font-size: 3rem;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 3.5rem;
  position: relative;
  text-shadow: 0 0 15px rgba(0, 0, 0, 0.9);
}

.section-title::after {
  content: '†';
  display: block;
  font-family: var(--font-horror);
  color: var(--accent-blood);
  font-size: 2rem;
  margin-top: 0.5rem;
  text-shadow: 0 0 10px var(--accent-glow);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.9rem 2.2rem;
  font-family: var(--font-gothic);
  font-size: 0.9rem;
  letter-spacing: 2px;
  text-decoration: none;
  font-weight: 700;
  text-transform: uppercase;
  border-radius: 2px;
  /* Sharper corners to match design */
  cursor: pointer;
  transition: all var(--transition-speed);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background-color: #6a0000;
  /* Darker red matching mockup */
  color: #fff;
  border: 1px solid #990000;
  box-shadow: 0 0 15px rgba(106, 0, 0, 0.4);
}

.btn-primary:hover {
  background-color: var(--accent-red);
  box-shadow: 0 0 25px var(--accent-glow);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: transparent;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.4);
}

.btn-secondary:hover {
  border-color: #ffffff;
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.05);
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.button-group {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
}

/* About Section & CV */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.profile-container {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.profile-card {
  background: var(--bg-secondary);
  border: 1px solid var(--accent-dark);
  padding: 2.5rem;
  border-radius: var(--border-radius);
  position: relative;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
}

.profile-card::before {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  bottom: -1px;
  background: linear-gradient(135deg, var(--accent-red), transparent, var(--accent-dark));
  z-index: -1;
  border-radius: var(--border-radius);
  opacity: 0.3;
  transition: var(--transition-speed);
}

.profile-card:hover::before {
  opacity: 0.6;
}

.profile-card h3 {
  font-family: var(--font-gothic);
  font-size: 1.8rem;
  color: var(--accent-blood);
  margin-bottom: 1rem;
  text-shadow: 0 0 8px var(--accent-glow);
}

.profile-card p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.skills-container {
  background: var(--bg-secondary);
  border: 1px solid var(--accent-dark);
  padding: 2.5rem;
  border-radius: var(--border-radius);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
}

.skills-container h3 {
  font-family: var(--font-gothic);
  font-size: 1.8rem;
  color: var(--accent-blood);
  margin-bottom: 2rem;
  text-shadow: 0 0 8px var(--accent-glow);
}

.skill-item {
  margin-bottom: 1.5rem;
}

.skill-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  font-family: var(--font-gothic);
  letter-spacing: 1px;
}

.skill-bar {
  height: 6px;
  background: #111;
  border-radius: 3px;
  overflow: hidden;
  border: 1px solid rgba(255, 0, 0, 0.1);
}

.skill-progress {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-red), var(--accent-blood));
  box-shadow: 0 0 8px var(--accent-glow);
  width: 0;
  /* Animated via JS or static */
  transition: width 1.5s cubic-bezier(0.1, 0.8, 0.25, 1);
}

/* Timeline (CV) */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 4rem auto 0;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(to bottom, var(--accent-red), var(--accent-dark), transparent);
  box-shadow: 0 0 5px var(--accent-glow);
}

.timeline-item {
  position: relative;
  margin-bottom: 3rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2.35rem;
  top: 0.25rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-blood);
  border: 2px solid var(--bg-primary);
  box-shadow: 0 0 8px var(--accent-blood);
  transition: var(--transition-speed);
}

.timeline-item:hover::before {
  transform: scale(1.4);
  background: #fff;
  box-shadow: 0 0 12px var(--accent-blood);
}

.timeline-date {
  font-family: var(--font-gothic);
  font-size: 0.9rem;
  color: var(--accent-blood);
  font-weight: 700;
  margin-bottom: 0.3rem;
  letter-spacing: 1px;
}

.timeline-content {
  background: var(--bg-secondary);
  border: 1px solid var(--accent-dark);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  transition: var(--transition-speed);
}

.timeline-content:hover {
  border-color: var(--accent-red);
  box-shadow: 0 5px 20px rgba(139, 0, 0, 0.2);
}

.timeline-title {
  font-family: var(--font-gothic);
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.timeline-subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  font-style: italic;
}

/* Projects Section */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2.5rem;
}

.project-card {
  background: var(--bg-secondary);
  border: 1px solid var(--accent-dark);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: all var(--transition-speed) ease;
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.project-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-red);
  box-shadow: 0 10px 30px rgba(255, 0, 0, 0.15);
}

.project-image {
  height: 200px;
  background: #111;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.7;
  transition: var(--transition-speed);
}

.project-card:hover .project-image img {
  opacity: 0.9;
  transform: scale(1.05);
}

.project-image::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, transparent, var(--bg-secondary));
}

.project-content {
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-title {
  font-family: var(--font-gothic);
  font-size: 1.4rem;
  margin-bottom: 0.8rem;
  color: var(--text-primary);
}

.project-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tag {
  font-size: 0.75rem;
  background: rgba(139, 0, 0, 0.2);
  border: 1px solid rgba(139, 0, 0, 0.4);
  color: var(--text-primary);
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
  font-family: var(--font-gothic);
  letter-spacing: 0.5px;
}

.project-links {
  display: flex;
  gap: 1rem;
}

.project-links a {
  font-size: 0.85rem;
  font-family: var(--font-gothic);
  text-decoration: none;
  color: var(--accent-blood);
  font-weight: 700;
  letter-spacing: 1px;
  transition: var(--transition-speed);
}

.project-links a:hover {
  color: #fff;
  text-shadow: 0 0 5px var(--accent-blood);
}

/* Contact Section & Form */
.contact-container {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4rem;
  align-items: start;
}

.contact-info {
  background: var(--bg-secondary);
  border: 1px solid var(--accent-dark);
  padding: 2.5rem;
  border-radius: var(--border-radius);
}

.contact-info h3 {
  font-family: var(--font-gothic);
  font-size: 1.8rem;
  color: var(--accent-blood);
  margin-bottom: 1.5rem;
  text-shadow: 0 0 8px var(--accent-glow);
}

.contact-info p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-method {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.contact-icon {
  width: 40px;
  height: 40px;
  background: var(--bg-tertiary);
  border: 1px solid var(--accent-red);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-blood);
  border-radius: 50%;
  font-size: 1.1rem;
  box-shadow: 0 0 8px rgba(255, 0, 0, 0.2);
}

.contact-text h4 {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.contact-text a,
.contact-text p {
  font-size: 1rem;
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition-speed);
}

.contact-text a:hover {
  color: var(--accent-blood);
}

.contact-form-container {
  background: var(--bg-secondary);
  border: 1px solid var(--accent-dark);
  padding: 2.5rem;
  border-radius: var(--border-radius);
  position: relative;
}

.form-group {
  margin-bottom: 2rem;
  position: relative;
}

.form-group input,
.form-group textarea {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--text-muted);
  padding: 0.8rem 0.5rem;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: var(--transition-speed);
  outline: none;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group label {
  position: absolute;
  left: 0.5rem;
  top: 0.8rem;
  color: var(--text-muted);
  pointer-events: none;
  transition: var(--transition-speed) ease;
  font-family: var(--font-gothic);
  letter-spacing: 1px;
  font-size: 0.95rem;
}

/* Floating labels effect */
.form-group input:focus~label,
.form-group input:not(:placeholder-shown)~label,
.form-group textarea:focus~label,
.form-group textarea:not(:placeholder-shown)~label {
  top: -1.2rem;
  font-size: 0.8rem;
  color: var(--accent-blood);
  text-shadow: 0 0 5px var(--accent-glow);
}

.form-group input:focus,
.form-group textarea:focus {
  border-bottom: 1px solid var(--accent-blood);
  box-shadow: 0 1px 0 var(--accent-blood);
}

/* Footer */
footer {
  background: #000;
  border-top: 1px solid var(--accent-dark);
  padding: 2rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-socials {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.footer-socials a {
  color: var(--text-muted);
  font-size: 1.2rem;
  transition: var(--transition-speed);
}

.footer-socials a:hover {
  color: var(--accent-blood);
  text-shadow: 0 0 8px var(--accent-blood);
}

/* Animations */
@keyframes flicker {

  0%,
  19%,
  21%,
  23%,
  25%,
  54%,
  56%,
  100% {
    text-shadow: 0 0 15px var(--accent-blood), 0 0 30px var(--accent-blood);
    opacity: 1;
  }

  20%,
  24%,
  55% {
    text-shadow: none;
    opacity: 0.7;
  }
}

@keyframes pulse {
  0% {
    text-shadow: 0 0 15px var(--accent-glow), 0 0 30px var(--accent-dark);
  }

  50% {
    text-shadow: 0 0 25px var(--accent-blood), 0 0 45px var(--accent-red), 0 0 5px #fff;
  }

  100% {
    text-shadow: 0 0 15px var(--accent-glow), 0 0 30px var(--accent-dark);
  }
}

/* Responsive Media Queries */
@media (max-width: 900px) {

  .about-grid,
  .contact-container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero-title {
    font-size: 3.5rem;
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  nav ul {
    position: fixed;
    top: 75px;
    right: -100%;
    width: 100%;
    height: calc(100vh - 75px);
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(15px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3rem;
    transition: var(--transition-speed) cubic-bezier(0.77, 0, 0.175, 1);
    border-top: 1px solid var(--accent-dark);
  }

  nav ul.active {
    right: 0;
  }

  .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }

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

  .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  /* Opravy pro mobilní zobrazení textů a tlačítek */
  .hero-title {
    font-size: 2.2rem;
  }

  .hero-description {
    font-size: 0.95rem;
    padding: 0 1rem;
  }

  .hero-tagline {
    font-size: 0.9rem;
    letter-spacing: 4px;
  }

  .button-group {
    flex-direction: column;
    gap: 1rem;
    width: 100%;
    max-width: 300px;
    margin: 0 auto;
  }

  .button-group .btn {
    width: 100%;
    text-align: center;
  }
}