/* Geek Theme - Dark Mode & Terminal Style */
:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #2a2a2a;
  --text-primary: #00ff41;
  --text-secondary: #00cc33;
  --text-muted: #666666;
  --accent-green: #00ff41;
  --accent-blue: #0080ff;
  --accent-purple: #8000ff;
  --accent-orange: #ff8000;
  --border-color: #333333;
  --shadow-color: rgba(0, 255, 65, 0.1);
  --terminal-bg: rgba(0, 0, 0, 0.9);
  --terminal-border: #00ff41;
  --terminal-shadow: 0 0 20px rgba(0, 255, 65, 0.3);
}

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

body {
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', 'Monaco', monospace;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Terminal-style scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

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

::-webkit-scend {
  background: var(--accent-green);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}
/* Fix typo: use correct thumb selector */
::-webkit-scrollbar-thumb {
  background: var(--accent-green);
  border-radius: 4px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--accent-green);
  font-weight: 600;
  margin-bottom: 1rem;
  text-shadow: 0 0 10px rgba(0, 255, 65, 0.3);
}

h1 {
  font-size: 2.5rem;
  background: linear-gradient(45deg, var(--accent-green), var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

p {
  color: var(--text-primary);
  margin-bottom: 1rem;
  font-size: 1rem;
}

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: all 0.3s ease;
  border-bottom: 1px solid transparent;
}

a:hover {
  color: var(--accent-green);
  border-bottom-color: var(--accent-green);
  text-shadow: 0 0 10px rgba(0, 255, 65, 0.5);
}

/* Terminal Window Effect */
.terminal-window {
  background: var(--terminal-bg);
  border: 2px solid var(--terminal-border);
  border-radius: 10px;
  padding: 2rem;
  margin: 2rem 0;
  box-shadow: var(--terminal-shadow);
  position: relative;
  overflow: hidden;
}

.terminal-window::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 30px;
  background: linear-gradient(90deg, #ff5f56, #ffbd2e, #27ca3f);
  border-radius: 8px 8px 0 0;
}

.terminal-window::after {
  content: '● ● ●';
  position: absolute;
  top: 8px;
  left: 15px;
  color: transparent;
  font-size: 12px;
  letter-spacing: 2px;
}

.terminal-content {
  margin-top: 40px;
}

/* Navigation */
.nav-container {
  background: var(--bg-secondary);
  border-bottom: 2px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
}

.nav-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav-brand {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--accent-green);
  text-shadow: 0 0 10px rgba(0, 255, 65, 0.5);
}

.nav-menu {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-menu a {
  color: var(--text-primary);
  padding: 0.5rem 1rem;
  border-radius: 5px;
  transition: all 0.3s ease;
  position: relative;
}

.nav-menu a:hover {
  background: var(--bg-tertiary);
  color: var(--accent-green);
}

.nav-menu a::before {
  content: '>';
  position: absolute;
  left: -10px;
  opacity: 0;
  transition: all 0.3s ease;
}

.nav-menu a:hover::before {
  opacity: 1;
  left: -5px;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  padding: 0.5rem;
  background: none;
  border: none;
  color: var(--accent-green);
  position: relative;
  width: 28px;
  height: 22px;
}

.mobile-menu-toggle span {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-green);
  transition: transform .28s ease, opacity .2s ease, top .28s ease;
  border-radius: 2px;
}

.mobile-menu-toggle span:nth-child(1) { top: 2px; }
.mobile-menu-toggle span:nth-child(2) { top: 10px; }
.mobile-menu-toggle span:nth-child(3) { top: 18px; }

.mobile-menu-toggle.active span:nth-child(1) {
  top: 10px;
  transform: rotate(45deg);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
  top: 10px;
  transform: rotate(-45deg);
}

/* Main Content */
.main-content {
  flex: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  width: 100%;
}

/* Cards */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 2rem;
  margin-bottom: 2rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-green), var(--accent-blue), var(--accent-purple));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.card:hover::before {
  transform: scaleX(1);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 255, 65, 0.1);
  border-color: var(--accent-green);
}

/* Buttons */
.btn {
  background: var(--bg-tertiary);
  color: var(--accent-green);
  border: 2px solid var(--accent-green);
  padding: 0.75rem 1.5rem;
  border-radius: 5px;
  cursor: pointer;
  font-family: inherit;
  font-size: 1rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 255, 65, 0.2), transparent);
  transition: left 0.5s ease;
}

.btn:hover::before {
  left: 100%;
}

.btn:hover {
  background: var(--accent-green);
  color: var(--bg-primary);
  box-shadow: 0 0 20px rgba(0, 255, 65, 0.3);
  transform: translateY(-2px);
}

/* Grid Layout */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

/* Profile Section */
.profile-section {
  text-align: center;
  padding: 3rem 0;
}

.profile-image {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border: 4px solid var(--accent-green);
  box-shadow: 0 0 30px rgba(0, 255, 65, 0.3);
  margin-bottom: 2rem;
  transition: all 0.3s ease;
}

.profile-image:hover {
  transform: scale(1.05);
  box-shadow: 0 0 40px rgba(0, 255, 65, 0.5);
}

/* Article Grid */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.article-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 2rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.article-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-green), var(--accent-blue));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.article-card:hover::before {
  transform: scaleX(1);
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 255, 65, 0.1);
  border-color: var(--accent-green);
}

.article-card h3 {
  color: var(--accent-green);
  margin-bottom: 1rem;
  font-size: 1.3rem;
}

.article-card p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.article-card .btn {
  width: 100%;
  text-align: center;
}

/* Terminal Typing Effect */
.typing-effect {
  overflow: hidden;
  border-right: 2px solid var(--accent-green);
  white-space: nowrap;
  animation: typing 3.5s steps(40, end), blink-caret 0.75s step-end infinite;
}

@keyframes typing {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes blink-caret {
  from, to { border-color: transparent; }
  50% { border-color: var(--accent-green); }
}

/* Glitch Effect */
.glitch {
  position: relative;
  animation: glitch 1s infinite;
}

@keyframes glitch {
  0% { transform: translate(0); }
  20% { transform: translate(-2px, 2px); }
  40% { transform: translate(-2px, -2px); }
  60% { transform: translate(2px, 2px); }
  80% { transform: translate(2px, -2px); }
  100% { transform: translate(0); }
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: 0.5rem 1rem 1rem;
    border-bottom: 2px solid var(--border-color);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    /* animation states */
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    max-height: 0;
    overflow: hidden;
    transition: opacity .22s ease, transform .22s ease, max-height .28s ease;
    display: flex;
    gap: .5rem;
  }

  .nav-menu.active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    max-height: 60vh;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .nav-content {
    padding: 0 1rem;
  }

  .main-content {
    padding: 1rem;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  .article-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 2rem;
  }

  .profile-image {
    width: 150px;
    height: 150px;
  }
}

@media (max-width: 480px) {
  .terminal-window {
    padding: 1rem;
    margin: 1rem 0;
  }

  .card {
    padding: 1.5rem;
  }

  .btn {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
  }
}

/* Loading Animation */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--bg-tertiary);
  border-radius: 50%;
  border-top-color: var(--accent-green);
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Matrix Rain Effect */
.matrix-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  opacity: 0.15;
}

.matrix-char {
  position: absolute;
  color: var(--accent-green);
  font-family: monospace;
  font-size: 14px;
  animation: matrix-fall 3s linear infinite;
}

@keyframes matrix-fall {
  0% {
    transform: translateY(-100vh);
    opacity: 1;
  }
  100% {
    transform: translateY(100vh);
    opacity: 0;
  }
}