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

:root {
  /* Brand Colors */
  --primary-crimson: #af101a;
  --primary-container: #d32f2f;
  --on-primary: #ffffff;

  /* Neutral / Surface Colors */
  --bg-surface: #f9f9f9; /* Base Canvas */
  --surface-low: #f3f3f3; /* Subtle Sectioning */
  --surface-card: #ffffff; /* Lifted Elements */
  --outline-variant: rgba(228, 190, 186, 0.15); /* Ghost Border */

  /* Text Colors */
  --on-surface: #1a1c1c; /* High Authority Text (Avoid Pure Black) */
  --secondary-slate: #5f5e5e; /* Metadata & Supporting UI */

  /* Accents */
  --tertiary-fixed: #bee9ff; /* Cool counterpoint for tech tags */
  --on-tertiary-fixed: #001f2a;
}

body {
  font-family: "Plus Jakarta Sans";
  width: 100%;
}

header {
  width: 100%;
  background: var(--bg-surface);
  border: 2px solid rgba(243, 243, 243, 1);
  backdrop-filter: blur(20px);
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 14rem;
  z-index: 10;
}

header h1 {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--primary-crimson);
  letter-spacing: -0.05em;
}

nav {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

nav a {
  color: var(--secondary-slate);
  letter-spacing: 0.025em;
  text-decoration: none;
}

nav .active-link {
  font-weight: 800;
  color: var(--primary-crimson);
  text-decoration: underline;
  text-underline-offset: 0.5rem;
  text-decoration-thickness: 0.1rem;
}

nav a:hover {
  color: var(--primary-crimson);
  transform: scale(1.01);
}

header button {
  /* display: flex; */
  justify-content: center;
  align-items: center;
  display: none;
  background: transparent;
  border: none;
  height: 1rem;
  width: auto;
  color: var(--primary-crimson);
}

#menu-icon {
  font-size: 2rem;
}

.hero {
  width: 100%;
  padding: 3rem 14rem;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  z-index: 1;
}
.hero-content {
  width: 50%;
}
.hero-content h1 {
  font-size: 6rem;
  font-weight: 800;
  color: var(--on-surface);
  line-height: 6rem;
}
.hero-content h1 .itallic-text {
  color: var(--primary-container);
  font-style: italic;
}

.hero-content p {
  margin-top: 2rem;
  font-size: 1.6rem;
  color: var(--secondary-slate);
}

.members-card {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
}
.members-count {
  color: var(--primary-container);
  font-weight: 800;
  font-size: 5rem;
}
.info-label {
  font-weight: 600;
  font-size: 1.5rem;
  letter-spacing: 0.1rem;
  color: var(--secondary-slate);
}

.hero-image {
  width: 40%;
  height: 40rem;
  overflow: hidden;
  border-radius: 24px;
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: grayscale(70);
}

.about {
  padding: 6rem 14rem;
  background-color: var(--bg-surface);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.about h2 {
  font-size: 4rem;
  font-weight: 800;
}

.subtext {
  color: var(--secondary-slate);
  font-size: 1.2rem;
  text-align: center;
  width: 60%;
}

.about-cards {
  margin-top: 4rem;
  display: flex;
  flex-direction: row;
  justify-content: space-evenly;
  gap: 1rem;
}

.about-card-item {
  display: flex;
  flex-direction: column;
  padding: 2rem;
  background-color: var(--on-primary);
  border: 3px solid var(--surface-low);
  border-radius: 2rem;
  gap: 2rem;
  width: 30%;
}

.icon {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 4rem;
  width: 4rem;
  background-color: rgba(211, 47, 47, 0.1);
  color: var(--primary-container);
  border-radius: 1rem;
}

.about-card-item h3 {
  font-size: 1.6rem;
}

.about-card-item p {
  color: var(--secondary-slate);
  line-height: 1.6rem;
}

.features,
.cta {
  padding: 6rem 14rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.features h2 {
  font-size: 3.5rem;
  font-weight: 800;
}

.feature-cards {
  margin-top: 4rem;
  display: flex;
  flex-direction: row;
  justify-content: space-evenly;
  gap: 1rem;
}

.feature-card-item {
  display: flex;
  flex-direction: column;
  padding: 2rem;
  background-color: var(--bg-surface);
  border-radius: 2rem;
  gap: 2rem;
  width: 30%;
  border-top: 4px solid var(--primary-container);
}

.feature-card-item h3 {
  font-size: 1.6rem;
}

.feature-card-item p {
  color: var(--secondary-slate);
  line-height: 1.6rem;
}

.cta-card {
  width: 100%;
  padding: 6rem 10rem;
  border-radius: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  background-color: rgba(211, 47, 47, 0.1);
}

.cta-card h2 {
  font-size: 4rem;
  font-weight: 800;
}

.cta-card p {
  color: var(--secondary-slate);
  font-size: 1.4rem;
  text-align: center;
  width: 70%;
}

.cta-card a {
  text-decoration: none;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  background-color: var(--primary-container);
  padding: 2rem 4rem;
  color: var(--on-primary);
  font-size: 1.6rem;
  font-weight: 600;
  border-radius: 1rem;
  transition: 1s ease-in-out;
}

.cta-card img {
  width: 2rem;
  height: 2rem;
}

.cta-card a:hover {
  transform: scale(1.05);
}

footer {
  background-color: var(--bg-surface);
  text-align: center;
  padding: 2rem;
}
/* Mobile */
@media (max-width: 768px) {
  header,
  .hero,
  .about,
  .features,
  .cta {
    padding: 2rem 1.5rem !important;
  }

  nav {
    display: none;
    background-color: var(--on-primary);
    border-bottom: 1px solid var(--bg-surface);
    backdrop-filter: blur(20px) brightness(0.9);
    box-shadow: 0 10px 15px -15px rgba(0, 0, 0, 0.3);
    position: absolute;
    flex-direction: column;
    padding: 1.6rem;
    top: 6rem;
    left: -0.01rem;
    width: 100%;
    align-items: flex-start;
  }
  nav .active-link {
    text-decoration: none;
  }
  nav a {
    font-size: 1.2rem;
  }
  header button {
    display: flex;
  }

  .hero {
    flex-direction: column;
    gap: 2rem;
  }

  .hero-content {
    width: 100%;
  }

  .hero h1 {
    font-size: 3rem;
    line-height: 3.5rem;
  }

  .hero p {
    font-size: 1.5rem;
  }

  .info-label {
    font-size: 1rem;
  }

  .hero-image {
    width: 100%;
    height: fit-content;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
  }

  .about {
    margin-top: -2.3rem;
  }

  .about h2,
  .features h2 {
    font-size: 2rem;
  }

  .subtext {
    font-size: 1rem;
    width: 100%;
  }

  .features .subtext {
    text-align: left;
  }

  .about-cards,
  .feature-cards {
    flex-direction: column;
    align-items: center;
  }

  .about-card-item,
  .feature-card-item {
    width: 100%;
    margin-bottom: 1rem;
  }

  .cta-card {
    padding: 3rem 1.5rem;
    gap: 0.5rem;
  }

  .cta-card h2 {
    font-size: 2rem;
  }

  .cta-card p {
    font-size: 1rem;
    text-align: left;
    width: 100%;
  }
  .cta-card a {
    margin-top: 1.5rem;
    padding: 2rem;
    height: 1rem;
    width: 100%;
    font-size: 1rem;
  }
}