/* RESET */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

/* BODY */
body {
  background: radial-gradient(circle at top, #1a2a6c, #0f2027);
  color: #ffffff;
  line-height: 1.6;
}

/* HERO */
.hero {
  min-height: 100vh;
  text-align: center;
  padding: 140px 20px;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.2),
    rgba(0, 0, 0, 0.7)
  );
}

.hero h1 {
  font-size: 4rem;
  font-weight: 800;
  letter-spacing: 2px;
}

.hero p {
  font-size: 1.2rem;
  margin: 20px 0 40px;
  opacity: 0.9;
}

/* BUTTON */
.btn {
  display: inline-block;
  padding: 15px 36px;
  background: linear-gradient(135deg, #00ffd5, #00bcd4);
  color: #000;
  text-decoration: none;
  font-weight: bold;
  border-radius: 40px;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
  transform: scale(1.05);
  box-shadow: 0 15px 30px rgba(0, 255, 213, 0.4);
}

/* SECTIONS */
.section {
  max-width: 1000px;
  margin: 80px auto;
  padding: 80px 30px;
  text-align: center;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 25px;
}

.section h2 {
  font-size: 2.4rem;
  margin-bottom: 20px;
}

/* CARDS */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 25px;
  margin-top: 40px;
}

.card {
  background: rgba(255, 255, 255, 0.15);
  padding: 35px;
  border-radius: 20px;
  font-size: 1.1rem;
  transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* TEXTAREA */
textarea {
  width: 100%;
  max-width: 600px;
  padding: 16px;
  border-radius: 15px;
  border: none;
  font-size: 1rem;
  resize: none;
}

/* NOTE */
.note {
  margin-top: 15px;
  font-size: 0.9rem;
  opacity: 0.7;
}

/* FOOTER */
footer {
  text-align: center;
  padding: 40px 20px;
  opacity: 0.7;
  font-size: 0.9rem;
}

/* MOBILE */
@media (max-width: 600px) {
  .hero h1 {
    font-size: 2.6rem;
  }

  .section {
    padding: 60px 20px;
  }
}
/* ICON NAVIGATION */
.nav-icons {
  display: flex;
  gap: 12px;
}

.nav-icons a {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 10px;
  text-decoration: none;
  font-size: 1.2rem;
  transition: transform 0.2s, background 0.2s;
}

.nav-icons a:hover {
  transform: scale(1.1);
  background: rgba(255, 255, 255, 0.3);
}
/* FADE-IN ANIMATION */
.section {
  animation: fadeUp 0.8s ease forwards;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* BUTTON CLICK FEEL */
.btn:active {
  transform: scale(0.95);
}
/* IDEA FORM */
.idea-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 500px;
  margin: 30px auto 0;
}

.idea-form input,
.idea-form textarea {
  padding: 14px;
  border-radius: 14px;
  border: none;
  font-size: 1rem;
}
/* IDEAS GRID */
.ideas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.idea-card {
  background: rgba(255,255,255,0.12);
  padding: 20px;
  border-radius: 20px;
  backdrop-filter: blur(10px);
  transition: transform 0.3s;
}

.idea-card:hover {
  transform: translateY(-5px);
}

.idea-card h3 {
  margin-bottom: 10px;
}

.idea-card span {
  font-size: 0.85rem;
  opacity: 0.7;
}
/* LIGHT MODE */
body.light {
  background: #f5f5f5;
  color: #111;
}

body.light .navbar {
  background: rgba(255,255,255,0.9);
}

body.light .idea-card {
  background: white;
}

body.light .btn {
  background: #111;
  color: white;
}