* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f4f7fb;
  color: #182230;
}

/* Header */
header {
  background: #173b57;
  color: white;
  padding: 22px 7%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 24px;
  font-weight: bold;
}

header p {
  margin: 0;
}

/* Main */
main {
  max-width: 1000px;
  margin: auto;
  padding: 30px 20px;
}

/* Hero */
.hero {
  text-align: center;
  padding: 45px 15px;
}

.hero h1 {
  font-size: 42px;
  margin-bottom: 10px;
}

.hero p {
  color: #5b6875;
  font-size: 18px;
}

/* Form Card */
.card {
  background: white;
  padding: 25px;
  border-radius: 16px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
  margin-bottom: 35px;
}

.card h2 {
  margin-top: 0;
}

input,
textarea {
  width: 100%;
  padding: 13px;
  margin: 8px 0;
  border: 1px solid #d5dce5;
  border-radius: 9px;
  font-size: 15px;
  font-family: Arial, sans-serif;
}

textarea {
  min-height: 90px;
  resize: vertical;
}

/* Button */
button {
  border: none;
  background: #1769aa;
  color: white;
  padding: 13px 22px;
  border-radius: 9px;
  cursor: pointer;
  font-weight: bold;
  font-size: 15px;
}

button:hover {
  background: #125787;
}

#message {
  color: #1769aa;
  font-weight: bold;
}

/* Ideas */
#ideas {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.idea {
  background: white;
  padding: 20px;
  border-radius: 14px;
  border-left: 5px solid #1769aa;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
}

.idea h3 {
  margin-top: 0;
}

.idea small {
  color: #687583;
}

/* Footer */
footer {
  text-align: center;
  padding: 25px;
  color: #687583;
}

/* Mobile */
@media (max-width: 650px) {
  header {
    display: block;
    text-align: center;
  }

  header p {
    margin-top: 6px;
  }

  .hero h1 {
    font-size: 32px;
  }
}