:root {
  --bg-color: #0b0b0f;
  --bg-secondary: #0f1115; /* slightly lighter for cards/sections */
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0a0;
  --accent-color: #00ff41; /* Matrix Green */
  --accent-hover: #00cc33;
  --accent-dark: #003b00;

  --font-base: "Space Grotesk", system-ui, -apple-system, sans-serif;
  --font-mono: "Fira Code", monospace;

  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 32px;
  --spacing-xl: 64px;

  --transition-speed: 0.3s;
}

/* Reset & Base */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-family: var(--font-base);
  color: var(--text-primary);
  background-color: var(--bg-color);
  line-height: 1.6;
}

body {
  overflow-x: hidden;
  width: 100%;
}

body.no-scroll {
  overflow: hidden;
}

ul {
  list-style: none;
}
a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-speed);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Utilities */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container--flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.text-center {
  text-align: center;
}

/* Typography */
h1,
h2,
h3 {
  font-family: var(--font-mono);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2rem, 5vw, 4rem);
  letter-spacing: -1px;
}
h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  margin-bottom: var(--spacing-lg);
  color: var(--accent-color);
  text-transform: uppercase;
}
h3 {
  font-size: 1.25rem;
  color: var(--accent-color);
}
p {
  margin-bottom: var(--spacing-md);
  font-size: 1rem;
  color: var(--text-secondary);
}

.lead-text {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 24px;
  font-family: var(--font-mono);
  font-weight: 600;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 1px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-speed);
}

.btn--primary {
  background-color: var(--accent-color);
  color: var(--bg-color);
  border-color: var(--accent-color);
}
.btn--primary:hover {
  background-color: transparent;
  color: var(--accent-color);
  box-shadow: 0 0 10px var(--accent-dark);
}

.btn--outline {
  background-color: transparent;
  border-color: var(--accent-color);
  color: var(--accent-color);
}
.btn--outline:hover {
  background-color: var(--accent-dark);
  color: var(--accent-color);
}

.btn--text {
  background: none;
  border: none;
  color: var(--text-secondary);
  text-decoration: underline;
  padding: 12px;
}
.btn--text:hover {
  color: var(--accent-color);
}

.btn--large {
  font-size: 1.2rem;
  padding: 16px 32px;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: var(--spacing-md) 0;
  background-color: rgba(11, 11, 15, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(0, 255, 65, 0.1);
}

.logo {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-color);
}

.nav-list {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}
.nav-list a {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  text-transform: uppercase;
}
.nav-list a:hover {
  color: var(--accent-color);
  text-shadow: 0 0 5px var(--accent-dark);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 6px;
  padding: 5px;
  z-index: 1200; /* Higher than nav-list (1100) */
  margin: 0 0 0 auto;
}

.mobile-menu-toggle span {
  display: block;
  width: 25px;
  height: 2px;
  background-color: var(--accent-color);
  transition: transform 0.3s, opacity 0.3s;
  transform-origin: center;
}

/* Hamburger to X Animation */
.mobile-menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Sections */
.section {
  padding: var(--spacing-xl) 0;
}
.section--darker {
  background-color: var(--bg-secondary);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 80px; /* header height */
  overflow: hidden;
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}
.hero__subtitle {
  font-family: var(--font-mono);
  color: var(--accent-color);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: var(--spacing-sm);
}
.hero__actions {
  margin-top: var(--spacing-lg);
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

canvas#matrix-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  opacity: 0.3;
}

/* Glitch Effect */
.glitch {
  position: relative;
  color: var(--text-primary);
}
.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.8;
}
.glitch::before {
  color: #ff00ff;
  z-index: -1;
  animation: glitch-anim-1 2s infinite linear alternate-reverse;
}
.glitch::after {
  color: #00ffff;
  z-index: -2;
  animation: glitch-anim-2 3s infinite linear alternate-reverse;
}

@keyframes glitch-anim-1 {
  0% {
    clip-path: inset(20% 0 80% 0);
    transform: translate(-2px, 0);
  }
  20% {
    clip-path: inset(60% 0 10% 0);
    transform: translate(2px, 0);
  }
  40% {
    clip-path: inset(40% 0 50% 0);
    transform: translate(-2px, 0);
  }
  60% {
    clip-path: inset(80% 0 5% 0);
    transform: translate(2px, 0);
  }
  80% {
    clip-path: inset(10% 0 60% 0);
    transform: translate(-2px, 0);
  }
  100% {
    clip-path: inset(30% 0 30% 0);
    transform: translate(2px, 0);
  }
}
@keyframes glitch-anim-2 {
  0% {
    clip-path: inset(10% 0 60% 0);
    transform: translate(2px, 0);
  }
  20% {
    clip-path: inset(30% 0 20% 0);
    transform: translate(-2px, 0);
  }
  40% {
    clip-path: inset(70% 0 10% 0);
    transform: translate(2px, 0);
  }
  60% {
    clip-path: inset(20% 0 50% 0);
    transform: translate(-2px, 0);
  }
  80% {
    clip-path: inset(50% 0 30% 0);
    transform: translate(2px, 0);
  }
  100% {
    clip-path: inset(0% 0 80% 0);
    transform: translate(-2px, 0);
  }
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}
.grid--2col {
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid--2col {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
}

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.skill-card {
  background: rgba(255, 255, 255, 0.03);
  padding: var(--spacing-lg);
  border: 1px solid rgba(0, 255, 65, 0.2);
  border-radius: 8px;
  transition:
    transform 0.3s,
    border-color 0.3s;
}
.skill-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-color);
  box-shadow: 0 5px 15px rgba(0, 255, 65, 0.1);
}
.skill-desc {
  font-size: 0.9rem;
  margin-top: var(--spacing-sm);
}

/* Timeline (Experience) */
.timeline {
  border-left: 2px solid var(--accent-color);
  padding-left: var(--spacing-lg);
  margin-left: var(--spacing-md);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--spacing-lg);
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--spacing-lg) - 9px); /* aligned to line center */
  top: 6px;
  width: 16px;
  height: 16px;
  background-color: var(--bg-color);
  border: 2px solid var(--accent-color);
  border-radius: 50%;
}

/* FAQ */
details {
  background: rgba(255, 255, 255, 0.03);
  margin-bottom: var(--spacing-sm);
  border-radius: 4px;
  overflow: hidden;
}

summary {
  padding: var(--spacing-md);
  cursor: pointer;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text-primary);
  list-style: none; /* simple removal of marker */
  position: relative;
}

summary::-webkit-details-marker {
  display: none;
} /* chrome marker removal */

summary::after {
  content: "+";
  position: absolute;
  right: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent-color);
  font-weight: bold;
}

details[open] summary::after {
  content: "-";
}

.faq-answer {
  padding: 0 var(--spacing-md) var(--spacing-md);
  color: var(--text-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Footer */
.site-footer {
  padding: var(--spacing-lg) 0;
  border-top: 1px solid rgba(0, 255, 65, 0.1);
  text-align: center;
}
.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  margin: var(--spacing-md) 0;
}
.socials a {
  color: var(--text-secondary);
  margin: 0 var(--spacing-sm);
  font-family: var(--font-mono);
}
.socials a:hover {
  color: var(--accent-color);
}
.copyright {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: var(--spacing-md);
}

/* Animations - Reveal */
.reveal-ready {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s cubic-bezier(0.5, 0, 0, 1);
}
.reveal-in {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal-ready {
    transition: none;
    transform: none;
    opacity: 1;
  }
  .glitch,
  .glitch::before,
  .glitch::after {
    animation: none;
  }
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  gap: var(--spacing-sm);
  margin-left: var(--spacing-lg);
}

.lang-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  padding: 4px;
  border: 1px solid transparent;
  transition: all 0.3s ease;
}

.lang-link:hover, .lang-link.active {
  color: var(--accent-color);
  border-bottom: 1px solid var(--accent-color);
}

/* Mobile Styles */
@media (max-width: 768px) {
  .container--flex {
    justify-content: space-between;
  }

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

  .nav-list {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    height: 100vh;
    background-color: var(--bg-color);
    flex-direction: column;
    justify-content: center;
    transition: right 0.3s cubic-bezier(0.77, 0.2, 0.05, 1.0);
    border-left: 1px solid var(--accent-color);
    box-shadow: -5px 0 15px rgba(0,0,0,0.5);
    z-index: 1100; /* Ensure it's on top of everything */
    padding: 2rem;
  }

  .nav-list.active {
    right: 0;
    visibility: visible;
  }

  .lang-switcher {
    margin-left: 0;
    margin-top: var(--spacing-lg);
    justify-content: center;
  }
}