:root {
  --bg: #eef2f6;
  --panel: #ffffff;
  --ink: #17202a;
  --muted: #65707d;
  --line: #d9e0e7;
  --accent: #0f8f6b;
  --danger: #b93232;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

.sponsor-page {
  width: min(1120px, calc(100% - 32px));
  margin: 32px auto;
}

.sponsor-hero {
  margin-bottom: 22px;
}

.back-link {
  color: var(--accent);
  text-decoration: none;
}

h1 {
  max-width: 760px;
  margin: 18px 0 10px;
  font-size: clamp(34px, 6vw, 64px);
  line-height: 1;
}

p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.sponsor-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(320px, 1.2fr);
  gap: 18px;
}

.sponsor-card,
.sponsor-form {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  box-shadow: 0 14px 34px rgba(30, 44, 60, 0.08);
}

.sponsor-card {
  padding: 22px;
}

.sponsor-card ul {
  display: grid;
  gap: 10px;
  padding-left: 20px;
  color: var(--muted);
}

.sponsor-form {
  display: grid;
  gap: 13px;
  padding: 22px;
}

h2 {
  margin: 0;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 14px;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 11px 12px;
  color: var(--ink);
  font: inherit;
}

textarea {
  resize: vertical;
}

.captcha-row input {
  max-width: 180px;
}

button {
  min-height: 44px;
  border: 0;
  border-radius: 8px;
  color: #ffffff;
  background: var(--accent);
  font: inherit;
  cursor: pointer;
}

.notice {
  color: #06513c;
}

.error {
  color: var(--danger);
}

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

@media (max-width: 760px) {
  .sponsor-page {
    width: min(100% - 20px, 1120px);
    margin: 16px auto 28px;
  }

  h1 {
    font-size: 34px;
  }

  .sponsor-grid {
    grid-template-columns: 1fr;
  }

  .sponsor-card,
  .sponsor-form {
    padding: 16px;
  }

  input,
  textarea {
    font-size: 16px;
  }
}