:root {
  --bg: #0d141b;
  --surface: #15212b;
  --text: #eaf3f8;
  --muted: #b4cad7;
  --border: #253746;
  --accent: #6bd0ea;
  --accent-strong: #4ac2e2;
  --error: #f4a9a9;
  --success: #99e3b9;
}

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

body {
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(circle at top, #162532 0%, var(--bg) 55%);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  width: min(780px, 92vw);
  margin: 4.5rem auto 2rem;
  flex: 1;
}

.sale-box {
  border: 1px solid var(--border);
  background: rgba(21, 33, 43, 0.9);
  padding: 2rem;
  border-radius: 14px;
}

.sale-box h1 {
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  line-height: 1.1;
  margin-bottom: 0.95rem;
}

.sale-box p {
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.65;
  margin-bottom: 0.75rem;
}

footer {
  width: min(780px, 92vw);
  margin: 0 auto 2.5rem;
  border: 1px solid var(--border);
  background: rgba(21, 33, 43, 0.88);
  border-radius: 14px;
  padding: 1.5rem;
}

footer h2 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.contact-form {
  display: grid;
  gap: 0.85rem;
}

.form-group {
  display: grid;
  gap: 0.4rem;
}

.form-label {
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
}

.form-input,
.form-textarea {
  width: 100%;
  border: 1px solid var(--border);
  background: #0f1a23;
  color: var(--text);
  padding: 0.75rem 0.9rem;
  border-radius: 10px;
  font: inherit;
}

.form-textarea {
  min-height: 130px;
  resize: vertical;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-strong);
}

.consent {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.45;
}

.consent input {
  margin-top: 0.2rem;
}

.form-submit {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #03202a;
  font-weight: 700;
  padding: 0.8rem 1.2rem;
  border-radius: 10px;
  cursor: pointer;
  width: fit-content;
}

.form-submit:hover:not(:disabled) {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
}

.form-submit:disabled {
  opacity: 0.75;
  cursor: wait;
}

.form-feedback {
  min-height: 1.2rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.form-feedback.success {
  color: var(--success);
}

.form-feedback.error {
  color: var(--error);
}

.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.legal-links {
  list-style: none;
  display: flex;
  gap: 1rem;
  margin-top: 1.25rem;
  flex-wrap: wrap;
}

.legal-links a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  font-size: 0.9rem;
}

.legal-links a:hover,
.legal-links a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
  outline: none;
}

@media (max-width: 640px) {
  main {
    margin-top: 2.5rem;
  }

  .sale-box,
  footer {
    padding: 1.1rem;
    border-radius: 12px;
  }
}