:root{
  --teal: #48A6A7;
  --navy: #013d71;
  --paper: #F2EFE7;
  --ink: #2a2f33;
  --ring: 0 0 0 2px rgba(72,166,167,.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.7;
}

/* Headings */
h1{
  margin: 32px 0 6px;
  font-size: clamp(28px, 4vw, 44px);
  color: var(--teal);
  text-align: center;
}
h2{
  margin: 0 0 32px;
  font-size: clamp(16px, 2.2vw, 20px);
  color: var(--navy);
  font-weight: 500;
  text-align: center;
  opacity: .85;
}

.container{
  width: min(700px, 90%);
  margin: 0 auto 60px;
}

.form{
  display: grid;
  gap: 24px;
}

label{
  font-size: 15px;
  color: var(--navy);
  font-weight: 600;
  display: block;
  margin-bottom: 6px;
}

.input, .textarea{
  width: 100%;
  padding: 8px 4px;
  border: none;
  border-bottom: 2px solid rgba(0,0,0,.2);
  background: transparent;
  color: var(--ink);
  font-size: 16px;
  outline: none;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.input:focus, .textarea:focus{
  border-color: var(--teal);
  box-shadow: var(--ring);
}
.input::placeholder, .textarea::placeholder{
  color: rgba(0,0,0,.4);
}

.textarea{
  min-height: 120px;
  resize: vertical;
}

.count-row{
  text-align: right;
  font-size: 13px;
  color: rgba(0,0,0,.6);
  margin-top: 4px;
}

.button{
  background-color: var(--teal);
  color: #fff;
  font-size: 16px;
  padding: 12px 18px;
  border: 0;
  border-radius: 6px;
  cursor: pointer;
  transition: transform .06s ease, background-color .15s ease;
}
.button:hover{ background-color: #3a8e8f; }
.button:active{ transform: translateY(1px); }
.button:focus-visible{ outline: none; box-shadow: var(--ring); }