improve code , show full version: 
:root {
  --bg-color: #1b1b1b;
  --text-color: #e0e0e0;
  --primary-color: #ff4081;
  --secondary-color: #00bcd4;
  --highlight-color: #ffeb3b;
  --neutral-light: #2c2c2c;
  --neutral-dark: #121212;
  --transition-speed: 0.3s;
  --border-radius: 8px;
  --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  --skew-angle: 10deg;
  --curve-radius: 20px;
  --noise-texture: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvdpM...");
  --glass-opacity: 0.8;
}

body {
  font-family: 'Montserrat', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color var(--transition-speed), color var(--transition-speed);
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  background-image: var(--noise-texture);
  background-size: 300px 300px;
}

h1, h2, h3 {
  font-family: 'Playfair Display', serif;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin: 20px;
  transform: skewY(var(--skew-angle));
  perspective: 1000px;
}

.grid-item {
  transform: skewY(calc(-1 * var(--skew-angle)));
  transition: transform var(--transition-speed);
}

.grid-item:hover {
  transform: skewY(calc(-1 * var(--skew-angle))) translateY(-10px) rotateX(10deg);
}

.header {
  background-color: var(--neutral-dark);
  color: var(--text-color);
  padding: 20px;
  text-align: center;
  box-shadow: var(--box-shadow);
}

.navigation {
  display: flex;
  justify-content: center;
  list-style: none;
  padding: 0;
  margin: 0;
}

.navigation__link {
  color: var(--text-color);
  text-decoration: none;
  margin: 0 15px;
  transition: color var(--transition-speed);
}

.navigation__link:hover,
.navigation__link:focus {
  color: var(--highlight-color);
  text-decoration: underline;
}

.hero {
  background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
  color: var(--text-color);
  text-align: center;
  padding: 60px 20px;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  margin: 20px;
  overflow: hidden;
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: var(--curve-radius);
  background-color: var(--neutral-light);
  border-radius: 0 0 100% 100%;
  transform: translateY(calc(var(--curve-radius) / 2));
}

.hero::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(circle, rgba(255, 255, 255, 0.1), transparent 10px);
  background-size: 20px 20px;
  opacity: 0.5;
  z-index: 0;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-content h2 {
  font-size: 2.5em;
  margin-bottom: 20px;
}

.hero-content p {
  font-size: 1.2em;
  margin-bottom: 20px;
}

.card {
  background-color: rgba(44, 44, 44, var(--glass-opacity));
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  margin: 20px;
  padding: 20px;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed), backdrop-filter var(--transition-speed);
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: var(--box-shadow), 0 6px 12px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(20px);
}

.card__image {
  max-width: 100%;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
  transition: transform var(--transition-speed);
}

.card:hover .card__image {
  transform: scale(1.1);
}

.card__title {
  font-family: 'Playfair Display', serif;
  color: var(--primary-color);
  font-size: 1.5em;
  margin-bottom: 10px;
}

.card__content {
  font-size: 1em;
  color: var(--text-color);
}

.button {
  padding: 12px 18px;
  border-radius: var(--border-radius);
  cursor: pointer;
  color: white;
  text-transform: uppercase;
  letter-spacing: 1px;
  box-shadow: var(--box-shadow);
  transition: transform var(--transition-speed), box-shadow var(--transition-speed), background-color var(--transition-speed);
  margin: 10px 5px;
  display: inline-block;
  background-color: transparent;
  border: 2px solid var(--primary-color);
  position: relative;
  overflow: hidden;
}

.button::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
  transform: translateX(-100%);
  transition: transform var(--transition-speed);
  z-index: -1;
}

.button:hover::before {
  transform: translateX(0);
}

.button:hover {
  transform: translateY(-4px);
  box-shadow: var(--box-shadow), 0 6px 12px rgba(0, 0, 0, 0.4);
  background-color: rgba(255, 255, 255, 0.1);
}

.button--primary {
  border-color: var(--primary-color);
}

.button--secondary {
  border-color: var(--secondary-color);
}

.form {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.form__input,
.form__textarea {
  background-color: var(--neutral-light);
  border: 1px solid var(--neutral-dark);
  border-radius: var(--border-radius);
  padding: 12px;
  width: calc(100% - 24px);
  box-sizing: border-box;
  margin-bottom: 12px;
  font-size: 1em;
  color: var(--text-color);
  transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.form__input:focus,
.form__textarea:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 8px var(--primary-color);
  outline: none;
}

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

.full-width {
  width: 100%;
}

.mt-20 {
  margin-top: 20px;
}

.mb-20 {
  margin-bottom: 20px;
}

.p-20 {
  padding: 20px;
}

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

.text-uppercase {
  text-transform: uppercase;
}

a:focus,
button:focus,
input:focus,
textarea:focus {
  outline: 2px dashed var(--highlight-color);
  outline-offset: 4px;
  box-shadow: 0 0 10px var(--highlight-color);
}

.hidden {
  display: none;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.fade-in {
  animation: fadeIn var(--transition-speed) ease-in;
}

@keyframes slideInLeft {
  from {
    transform: translateX(-100%);
    opacity: 0;
  }

  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.slide-in-left {
  animation: slideInLeft var(--transition-speed) ease-out;
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }

  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.slide-in-right {
  animation: slideInRight var(--transition-speed) ease-out;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }

  40% {
    transform: translateY(-30px);
  }

  60% {
    transform: translateY(-15px);
  }
}

.bounce {
  animation: bounce 2s infinite;
}

/* Mobile styles (default) */
.hero-content {
  max-width: 100%;
  margin: auto;
  padding: 40px 20px;
}

.hero-content h2 {
  font-size: 1.8em;
}

.grid {
  grid-template-columns: 1fr;
  transform: skewY(0);
}

.grid-item {
  transform: skewY(0);
}

.form__input,
.form__textarea {
  width: 100%;
}

@media (min-width: 768px) {
  .hero-content {
    max-width: 800px;
    padding: 60px 20px;
  }

  .hero-content h2 {
    font-size: 2.5em;
  }

  .grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    transform: skewY(var(--skew-angle));
  }

  .grid-item {
    transform: skewY(calc(-1 * var(--skew-angle)));
  }

  .navigation {
    flex-direction: row;
  }

  .form__input,
  .form__textarea {
    width: 80%;
  }
}

/* ... (rest of the media queries and other styles) ... */

footer {
  background-color: var(--neutral-dark);
  color: var(--text-color);
  padding: 20px;
  text-align: center;
  position: fixed;
  bottom: 0;
  width: 100%;
  box-shadow: var(--box-shadow);
}

footer p {
  margin: 0;
  font-size: 0.9em;
}

.info-section {
  padding: 40px 20px;
  background-color: var(--neutral-light);
  margin: 20px;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
}

.info-section h2 {
  font-family: 'Playfair Display', serif;
  color: var(--primary-color);
  font-size: 2em;
  margin-bottom: 20px;
}

.frequency-display {
  background: var(--neutral-light);
  border-radius: var(--border-radius);
  padding: 20px;
  margin: 10px 0;
  text-align: center;
  font-size: 1.2em;
  color: var(--primary-color);
  transition: background var(--transition-speed);
}

input,
textarea {
  background-color: var(--neutral-light);
  border: 1px solid var(--neutral-dark);
  border-radius: var(--border-radius);
  padding: 12px;
  width: calc(100% - 24px);
  box-sizing: border-box;
  margin-bottom: 12px;
  font-size: 1em;
  color: var(--text-color);
}