* {
  box-sizing: border-box;
}

:root {
  --navy: #0f1b2a;
  --navy-light: #1c2d42;
  --red: #e8473f;
  --red-dark: #c93a33;
  --bg: #eef1f5;
  --text: #1b2430;
  --muted: #5d6a7a;
  --border: #cfd6df;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  font-family: "DM Sans", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.card {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  width: 100%;
  max-width: 880px;
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(15, 27, 42, 0.12);
}

.intro {
  background: var(--navy);
  color: #fff;
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
}

.intro h1 {
  margin: 0 0 12px;
  font-size: 2rem;
  line-height: 1.15;
}

.tagline {
  margin: 0 0 32px;
  color: #b9c4d2;
  line-height: 1.6;
}

.steps {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 14px;
  line-height: 1.5;
}

.steps li::marker {
  color: var(--red);
  font-weight: 700;
}

.built-with {
  margin: auto 0 0;
  padding-top: 32px;
  font-size: 0.85rem;
  color: #8493a6;
}

.form-side {
  padding: 40px 32px;
}

label {
  display: block;
  margin: 16px 0 6px;
  font-size: 0.9rem;
  font-weight: 500;
}

label:first-child {
  margin-top: 0;
}

input,
select,
textarea {
  width: 100%;
  padding: 11px 12px;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
}

input::placeholder,
textarea::placeholder {
  color: #8a96a5;
}

textarea {
  resize: vertical;
  min-height: 70px;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--navy);
  outline-offset: 1px;
  border-color: var(--navy);
}

button {
  width: 100%;
  margin-top: 22px;
  padding: 13px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  background: var(--red);
  border: none;
  border-radius: 8px;
  cursor: pointer;
}

button:hover {
  background: var(--red-dark);
}

button:focus-visible {
  outline: 2px solid var(--navy);
  outline-offset: 2px;
}

button:disabled {
  opacity: 0.6;
  cursor: wait;
}

.success {
  min-height: 1.4em;
  margin: 14px 0 0;
  text-align: center;
  font-weight: 500;
  color: var(--navy);
}

.success.error {
  color: var(--red-dark);
}

.contact-box {
  margin-top: 16px;
  padding: 16px;
  background: var(--bg);
  border-left: 4px solid var(--red);
  border-radius: 8px;
  font-size: 0.92rem;
  line-height: 1.5;
}

.contact-box[hidden] {
  display: none;
}

.contact-box p {
  margin: 0 0 12px;
}

.mail-address {
  margin: 0;
  font-weight: 700;
  color: var(--navy);
  word-break: break-all;
  user-select: all;
}

@media (max-width: 720px) {
  .card {
    grid-template-columns: 1fr;
  }

  .intro,
  .form-side {
    padding: 28px 22px;
  }

  .intro h1 {
    font-size: 1.6rem;
  }

  .tagline {
    margin-bottom: 20px;
  }

  .built-with {
    display: none;
  }
}