:root {
  --bg: #040604;
  --bg-soft: #0a100a;
  --green: #39ff14;
  --green-soft: #22cc11;
  --text: #d8ffd1;
  --muted: #9ac493;
  --panel: rgba(3, 20, 3, 0.78);
  --border: rgba(57, 255, 20, 0.35);
  --shadow: 0 0 18px rgba(57, 255, 20, 0.2);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "Share Tech Mono", monospace;
  scroll-behavior: smooth;
}

#matrix {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.25;
  pointer-events: none;
}

.overlay {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(to bottom, rgba(0, 0, 0, 0.05), rgba(0, 0, 0, 0.55)),
    repeating-linear-gradient(
      to bottom,
      rgba(57, 255, 20, 0.03) 0,
      rgba(57, 255, 20, 0.03) 1px,
      transparent 2px,
      transparent 4px
    );
}

.page {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem;
}

header {
  position: sticky;
  top: 0;
  z-index: 5;
  margin: 0.5rem auto 1rem;
  padding: 0.8rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  backdrop-filter: blur(5px);
  background: rgba(2, 10, 2, 0.8);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.logo {
  font-family: "Bitwise", "Share Tech Mono", monospace;
  font-size: clamp(1.2rem, 2.6vw, 2rem);
  color: var(--green);
  letter-spacing: 0.08em;
  text-shadow: 0 0 10px rgba(57, 255, 20, 0.7);
  text-transform: lowercase;
  line-height: 1;
  margin: 0;
}

.lang-switch {
  display: flex;
  gap: 0.45rem;
}

.lang-btn {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  padding: 0.35rem 0.65rem;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s ease;
  font-size: 0.95rem;
}

.lang-btn:hover,
.lang-btn.active {
  color: var(--bg);
  background: var(--green);
  border-color: var(--green);
  box-shadow: 0 0 10px rgba(57, 255, 20, 0.5);
}

.hero,
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.hero {
  padding: 2rem 1.2rem;
  margin-bottom: 1rem;
}

.hero h1 {
  margin: 0 0 0.8rem;
  font-size: clamp(1.7rem, 3.5vw, 2.7rem);
  color: var(--green);
  line-height: 1.15;
  text-shadow: 0 0 12px rgba(57, 255, 20, 0.45);
}

.hero p {
  margin: 0;
  max-width: 75ch;
  color: var(--text);
  font-size: 1.1rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.panel {
  padding: 1rem;
}

.panel h2,
.panel h3 {
  margin-top: 0;
  color: var(--green);
  text-shadow: 0 0 8px rgba(57, 255, 20, 0.4);
}

.panel p {
  color: var(--text);
  line-height: 1.45;
  margin: 0.5rem 0 0;
}

ul {
  margin: 0.6rem 0 0;
  padding-left: 1.15rem;
}

li {
  margin: 0.35rem 0;
  color: var(--text);
}

.cta {
  margin-top: 1rem;
  display: inline-block;
  border: 1px solid var(--green);
  color: var(--green);
  text-decoration: none;
  padding: 0.55rem 0.9rem;
  transition: all 0.2s ease;
}

.cta:hover {
  background: var(--green);
  color: #001000;
  box-shadow: 0 0 12px rgba(57, 255, 20, 0.5);
}

footer {
  margin: 1.5rem 0 1rem;
  padding: 1rem;
  text-align: center;
  border: 1px solid var(--border);
  background: rgba(2, 10, 2, 0.75);
  color: var(--muted);
  font-size: 0.95rem;
}

[data-lang] {
  display: none;
}

[data-lang].visible {
  display: block;
}

.terminal-line {
  color: var(--muted);
  margin: 0.2rem 0 0.8rem;
  font-size: 0.95rem;
}

@media (max-width: 640px) {
  header {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    padding: 1.5rem 1rem;
  }
}