:root {
  --bg-color: #0d0d0d;
  --text-color: #33ff33;
  --accent: #ffffff;
  --link-color: #00bfff;
  --header-bg: #111;
  --section-bg: #0a0a0a;
  --border-color: #33ff33;
  --hover-color: #66ff66;
  --transition-speed: 0.3s;
}
[data-theme="light"] {
  --bg-color: #f5f5f5;
  --text-color: #2d2d2d;
  --accent: #0066cc;
  --link-color: #0066cc;
  --header-bg: #e0e0e0;
  --section-bg: #ffffff;
  --border-color: #0066cc;
  --hover-color: #004499;
}
* {
  scroll-behavior: smooth;
}
body {
  background: var(--bg-color);
  color: var(--text-color);
  font-family: 'Courier New', monospace;
  margin: 0;
  padding: 0;
  transition: background-color var(--transition-speed), color var(--transition-speed);
}
header {
  background-color: var(--header-bg);
  padding: 2rem 1rem;
  text-align: center;
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background-color var(--transition-speed);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}
header h1 {
  font-size: 1.8rem;
  margin: 0;
  position: relative;
}
header h1::after {
  content: '|';
  animation: blink 1s infinite;
  color: var(--accent);
}
@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}
header p {
  font-size: 1rem;
  color: #aaa;
  margin: 0.5rem 0;
}
nav {
  margin-top: 1rem;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}
nav a {
  text-decoration: none;
  color: var(--accent);
  font-weight: bold;
  padding: 0.5rem 1rem;
  border: 2px solid transparent;
  border-radius: 4px;
  transition: all var(--transition-speed);
  position: relative;
  overflow: hidden;
}
nav a::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--accent);
  transition: left var(--transition-speed);
  z-index: -1;
}
nav a:hover::before {
  left: 0;
}
nav a:hover {
  color: var(--bg-color);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 255, 255, 0.3);
}
nav a.active {
  background: var(--accent);
  color: var(--bg-color);
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 255, 255, 0.4);
  font-weight: bold;
}
nav a.active::before {
  left: 0;
}
nav a.active::after {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(45deg, var(--accent), var(--hover-color));
  border-radius: 6px;
  z-index: -2;
  opacity: 0.3;
  animation: activeGlow 2s ease-in-out infinite alternate;
}
@keyframes activeGlow {
  from {
    opacity: 0.3;
    transform: scale(1);
  }
  to {
    opacity: 0.5;
    transform: scale(1.02);
  }
}
.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  padding: 10px;
  background: transparent;
  border: none;
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 1001;
  transition: all var(--transition-speed);
}
.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--accent);
  margin: 3px 0;
  transition: all var(--transition-speed);
  border-radius: 2px;
}
.hamburger:hover span {
  background: var(--hover-color);
}
.mobile-menu {
  position: fixed;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100vh;
  background: var(--bg-color);
  z-index: 1000;
  transition: left var(--transition-speed);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
}
.mobile-menu.active {
  left: 0;
  opacity: 1;
}
.mobile-menu a {
  color: var(--text-color);
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: bold;
  margin: 1rem 0;
  padding: 1rem 2rem;
  border: 2px solid transparent;
  border-radius: 8px;
  transition: all var(--transition-speed);
  position: relative;
  overflow: hidden;
  min-width: 150px;
  text-align: center;
  opacity: 0;
  transform: translateX(-50px);
}
.mobile-menu.active a {
  animation: slideInFromLeft 0.3s ease forwards;
}
.mobile-menu.active a:nth-child(2) { animation-delay: 0.1s; }
.mobile-menu.active a:nth-child(3) { animation-delay: 0.2s; }
.mobile-menu.active a:nth-child(4) { animation-delay: 0.3s; }
.mobile-menu.active a:nth-child(5) { animation-delay: 0.4s; }
.mobile-menu.active a:nth-child(6) { animation-delay: 0.5s; }
@keyframes slideInFromLeft {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}
.mobile-menu a::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--accent);
  transition: left var(--transition-speed);
  z-index: -1;
}
.mobile-menu a:hover::before {
  left: 0;
}
.mobile-menu a:hover {
  color: var(--bg-color);
  border-color: var(--accent);
  transform: scale(1.05);
  box-shadow: 0 4px 15px rgba(0, 255, 255, 0.3);
}
.mobile-menu a.active {
  background: var(--accent);
  color: var(--bg-color);
  border-color: var(--accent);
  transform: scale(1.05);
  box-shadow: 0 4px 15px rgba(0, 255, 255, 0.4);
  font-weight: bold;
}
.mobile-menu a.active::before {
  left: 0;
}
.mobile-menu a.active::after {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(45deg, var(--accent), var(--hover-color));
  border-radius: 10px;
  z-index: -2;
  opacity: 0.3;
  animation: mobileActiveGlow 2s ease-in-out infinite alternate;
}
@keyframes mobileActiveGlow {
  from {
    opacity: 0.3;
    transform: scale(1);
  }
  to {
    opacity: 0.5;
    transform: scale(1.02);
  }
}
.mobile-menu-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: transparent;
  border: none;
  color: var(--accent);
  font-size: 2rem;
  cursor: pointer;
  padding: 10px;
  transition: all var(--transition-speed);
}
.mobile-menu-close:hover {
  color: var(--hover-color);
  transform: rotate(90deg);
}
.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}
.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-speed);
}
.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--accent);
  color: var(--bg-color);
  border: none;
  padding: 10px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
  transition: all var(--transition-speed);
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}
.theme-toggle:hover {
  transform: rotate(180deg);
  box-shadow: 0 4px 15px rgba(0, 255, 255, 0.5);
}
.container {
  max-width: 1000px;
  margin: auto;
  padding: 1.5rem;
}
.terminal-section {
  border-left: 4px solid var(--border-color);
  padding-left: 1rem;
  margin-bottom: 2rem;
  background: var(--section-bg);
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  transition: all var(--transition-speed);
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease forwards;
}
.terminal-section:nth-child(1) { animation-delay: 0.1s; }
.terminal-section:nth-child(2) { animation-delay: 0.2s; }
.terminal-section:nth-child(3) { animation-delay: 0.3s; }
.terminal-section:nth-child(4) { animation-delay: 0.4s; }
.terminal-section:nth-child(5) { animation-delay: 0.5s; }
@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.terminal-section:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
  border-left-color: var(--hover-color);
}
h2 {
  color: var(--accent);
  font-size: 1.3rem;
  margin-bottom: 1rem;
  position: relative;
  animation: pulse 2s infinite; 
}

h2::before {
  content: '> ';
  color: var(--text-color);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}
.skills-grid div {
  margin-bottom: 20px;
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  transition: all var(--transition-speed);
  background: rgba(51, 255, 51, 0.05);
}
.skills-grid div:hover {
  background: rgba(51, 255, 51, 0.1);
  transform: scale(1.02);
  box-shadow: 0 4px 15px rgba(51, 255, 51, 0.2);
}
.project {
  margin-bottom: 1.5rem;
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  transition: all var(--transition-speed);
  background: rgba(0, 255, 255, 0.05);
}
.project:hover {
  background: rgba(0, 255, 255, 0.1);
  transform: translateX(10px);
  box-shadow: 0 4px 15px rgba(0, 255, 255, 0.2);
}
.project h3 {
  color: var(--text-color);
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}
.project p {
  margin: 0.5rem 0;
  line-height: 1.6;
}
.project ul {
  margin: 0.5rem 0;
  padding-left: 1.5rem;
}
.project li {
  margin: 0.3rem 0;
  line-height: 1.5;
}
#experience .project {
  background: rgba(51, 255, 51, 0.05);
  border-color: var(--text-color);
}
#experience .project:hover {
  background: rgba(51, 255, 51, 0.1);
  box-shadow: 0 4px 15px rgba(51, 255, 51, 0.2);
}
#experience .project h3 {
  color: var(--text-color);
  font-size: 1.2rem;
}
#certs ul {
  list-style: none;
  padding: 0;
}
#certs li {
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(51, 255, 51, 0.2);
  transition: all var(--transition-speed);
}
#certs li:hover {
  background: rgba(51, 255, 51, 0.05);
  padding-left: 0.5rem;
  border-left: 3px solid var(--text-color);
}
#certs li:last-child {
  border-bottom: none;
}
a {
  color: var(--link-color);
  text-decoration: none;
  transition: all var(--transition-speed);
  position: relative;
}
a:hover {
  color: var(--hover-color);
  text-shadow: 0 0 8px var(--hover-color);
}
a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -2px;
  left: 0;
  background: var(--hover-color);
  transition: width var(--transition-speed);
}
a:hover::after {
  width: 100%;
}
.contact-form {
  display: grid;
  gap: 1rem;
  max-width: 500px;
  margin: 0 auto;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.form-group label {
  font-weight: bold;
  color: var(--accent);
}
.form-group input,
.form-group textarea {
  padding: 0.8rem;
  border: 2px solid var(--border-color);
  border-radius: 4px;
  background: var(--bg-color);
  color: var(--text-color);
  font-family: 'Courier New', monospace;
  transition: all var(--transition-speed);
}
.form-group #captcha-img {
  width: 100%;
  height: 4.0rem;
  max-height: 6rem;
  border-radius: 4px;
}
.form-group #captcha-refresh {
  align-self: start;
  background: transparent;
  color: var(--accent);
  border: 2px solid #55266c;
  padding: 0.4rem 1rem;
  font-family: 'Courier New', monospace;
  font-weight: bold;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-speed);
  font-size: 0.9rem;
}
.form-group #captcha-refresh:hover {
  background: #55266c;
  color: #fff;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
  transform: scale(1.02);
}
.submit-btn {
  background: var(--accent);
  color: var(--bg-color);
  border: none;
  padding: 1rem 2rem;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
  font-weight: bold;
  cursor: pointer;
  transition: all var(--transition-speed);
  position: relative;
  overflow: hidden;
}
.submit-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--hover-color);
  transition: left var(--transition-speed);
  z-index: -1;
}
.submit-btn:hover::before {
  left: 0;
}
.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0, 255, 255, 0.4);
}
.submit-btn:active {
  transform: translateY(0);
}
.message {
  padding: 1rem;
  border-radius: 4px;
  margin: 1rem 0;
  text-align: center;
  font-weight: bold;
  animation: slideIn 0.3s ease;
}
.success,
.error {
  width: fit-content;
  margin: 1rem auto;
  padding: 1rem;
  border-radius: 4px;
  font-weight: bold;
  text-align: center;
  animation: slideIn 0.3s ease;
  background: rgba(0, 255, 0, 0.1);
  border: 1px solid #00ff00;
  color: #00ff00;
}
.error {
  background: rgba(255, 0, 0, 0.1);
  border: 1px solid #ff0000;
  color: #ff0000;
}
@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
footer {
  text-align: center;
  padding: 1rem;
  background: var(--header-bg);
  color: #666;
  font-size: 0.9rem;
  transition: background-color var(--transition-speed);
}
@media (max-width: 768px) {
  header h1 {
    font-size: 1.5rem;
  }
  nav {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .terminal-section {
    padding: 1rem;
  }
  .skills-grid {
    grid-template-columns: 1fr;
  }
}
@media (min-width: 769px) {
  .hamburger,
  .mobile-menu,
  .mobile-menu-overlay {
    display: none !important;
  }
}