:root {
  --green: #4dbd00;
  --green-dark: #3a9300;
  --text: #2f3437;
  --muted: #667078;
  --line: #e7ebed;
  --soft: #f5f8f2;
  --white: #ffffff;
  --shadow: 0 22px 60px rgba(31, 41, 47, 0.10);
}

* { box-sizing: border-box; }

html { min-width: 320px; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 50% -10%, rgba(77, 189, 0, 0.09), transparent 34rem),
    #f7f8f8;
}

body::before {
  content: "";
  position: fixed;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--green);
}

.page-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 40px 20px;
}

.support-card {
  width: min(100%, 720px);
  overflow: hidden;
  background: var(--white);
  border: 1px solid rgba(37, 50, 56, 0.08);
  border-radius: 22px;
  box-shadow: var(--shadow);
  text-align: center;
}

.brand {
  display: inline-flex;
  margin-top: 38px;
  padding: 8px;
}

.brand img {
  display: block;
  width: 275px;
  height: auto;
}

.content {
  padding: 26px 64px 42px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--green-dark);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  max-width: 560px;
  margin: 0 auto;
  font-size: clamp(1.7rem, 4vw, 2.15rem);
  line-height: 1.15;
  letter-spacing: -0.035em;
}

.lead {
  max-width: 590px;
  margin: 20px auto 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: min(100%, 470px);
  min-height: 58px;
  margin-top: 30px;
  padding: 15px 24px;
  border-radius: 8px;
  color: var(--white);
  background: var(--green);
  box-shadow: 0 10px 24px rgba(77, 189, 0, 0.23);
  font-weight: 600;
  line-height: 1.35;
  text-decoration: none;
  transition: transform .18s ease, background-color .18s ease, box-shadow .18s ease;
}

.primary-button svg,
.notice svg { fill: currentColor; flex: 0 0 auto; }

.primary-button:hover {
  background: var(--green-dark);
  box-shadow: 0 12px 28px rgba(58, 147, 0, 0.28);
  transform: translateY(-2px);
}

.primary-button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(77, 189, 0, 0.32);
  outline-offset: 4px;
}

.notice {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin: 24px auto 0;
  padding: 17px 18px;
  border: 1px solid #dce8d4;
  border-radius: 10px;
  background: var(--soft);
  color: #52604b;
  text-align: left;
}

.notice svg { color: var(--green-dark); margin-top: 2px; }

.notice p {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.55;
}

footer {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 9px 12px;
  padding: 21px 28px;
  border-top: 1px solid var(--line);
  background: #fbfcfc;
  color: var(--muted);
  font-size: 0.86rem;
}

footer a {
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
}

footer a:hover { color: var(--green-dark); }

.divider {
  width: 1px;
  height: 16px;
  background: #cfd5d8;
}

@media (max-width: 640px) {
  .page-shell { padding: 18px 22px; }
  .support-card { border-radius: 16px; }
  .brand { margin-top: 24px; }
  .brand img { width: 174px; }
  .content { padding: 20px 22px 30px; }
  .lead { font-size: 0.94rem; }
  .primary-button { min-height: 56px; padding-inline: 18px; }
  footer { padding: 18px 20px; }
}

@media (max-width: 430px) {
  footer { flex-direction: column; }
  .divider { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}